FFmpeg 4.2.2
avcodec.h
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1/*
2 * copyright (c) 2001 Fabrice Bellard
3 *
4 * This file is part of FFmpeg.
5 *
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
21#ifndef AVCODEC_AVCODEC_H
22#define AVCODEC_AVCODEC_H
23
24/**
25 * @file
26 * @ingroup libavc
27 * Libavcodec external API header
28 */
29
30#include <errno.h>
31#include "libavutil/samplefmt.h"
33#include "libavutil/avutil.h"
34#include "libavutil/buffer.h"
35#include "libavutil/cpu.h"
37#include "libavutil/dict.h"
38#include "libavutil/frame.h"
39#include "libavutil/hwcontext.h"
40#include "libavutil/log.h"
41#include "libavutil/pixfmt.h"
42#include "libavutil/rational.h"
43
44#include "version.h"
45
46/**
47 * @defgroup libavc libavcodec
48 * Encoding/Decoding Library
49 *
50 * @{
51 *
52 * @defgroup lavc_decoding Decoding
53 * @{
54 * @}
55 *
56 * @defgroup lavc_encoding Encoding
57 * @{
58 * @}
59 *
60 * @defgroup lavc_codec Codecs
61 * @{
62 * @defgroup lavc_codec_native Native Codecs
63 * @{
64 * @}
65 * @defgroup lavc_codec_wrappers External library wrappers
66 * @{
67 * @}
68 * @defgroup lavc_codec_hwaccel Hardware Accelerators bridge
69 * @{
70 * @}
71 * @}
72 * @defgroup lavc_internal Internal
73 * @{
74 * @}
75 * @}
76 */
77
78/**
79 * @ingroup libavc
80 * @defgroup lavc_encdec send/receive encoding and decoding API overview
81 * @{
82 *
83 * The avcodec_send_packet()/avcodec_receive_frame()/avcodec_send_frame()/
84 * avcodec_receive_packet() functions provide an encode/decode API, which
85 * decouples input and output.
86 *
87 * The API is very similar for encoding/decoding and audio/video, and works as
88 * follows:
89 * - Set up and open the AVCodecContext as usual.
90 * - Send valid input:
91 * - For decoding, call avcodec_send_packet() to give the decoder raw
92 * compressed data in an AVPacket.
93 * - For encoding, call avcodec_send_frame() to give the encoder an AVFrame
94 * containing uncompressed audio or video.
95 * In both cases, it is recommended that AVPackets and AVFrames are
96 * refcounted, or libavcodec might have to copy the input data. (libavformat
97 * always returns refcounted AVPackets, and av_frame_get_buffer() allocates
98 * refcounted AVFrames.)
99 * - Receive output in a loop. Periodically call one of the avcodec_receive_*()
100 * functions and process their output:
101 * - For decoding, call avcodec_receive_frame(). On success, it will return
102 * an AVFrame containing uncompressed audio or video data.
103 * - For encoding, call avcodec_receive_packet(). On success, it will return
104 * an AVPacket with a compressed frame.
105 * Repeat this call until it returns AVERROR(EAGAIN) or an error. The
106 * AVERROR(EAGAIN) return value means that new input data is required to
107 * return new output. In this case, continue with sending input. For each
108 * input frame/packet, the codec will typically return 1 output frame/packet,
109 * but it can also be 0 or more than 1.
110 *
111 * At the beginning of decoding or encoding, the codec might accept multiple
112 * input frames/packets without returning a frame, until its internal buffers
113 * are filled. This situation is handled transparently if you follow the steps
114 * outlined above.
115 *
116 * In theory, sending input can result in EAGAIN - this should happen only if
117 * not all output was received. You can use this to structure alternative decode
118 * or encode loops other than the one suggested above. For example, you could
119 * try sending new input on each iteration, and try to receive output if that
120 * returns EAGAIN.
121 *
122 * End of stream situations. These require "flushing" (aka draining) the codec,
123 * as the codec might buffer multiple frames or packets internally for
124 * performance or out of necessity (consider B-frames).
125 * This is handled as follows:
126 * - Instead of valid input, send NULL to the avcodec_send_packet() (decoding)
127 * or avcodec_send_frame() (encoding) functions. This will enter draining
128 * mode.
129 * - Call avcodec_receive_frame() (decoding) or avcodec_receive_packet()
130 * (encoding) in a loop until AVERROR_EOF is returned. The functions will
131 * not return AVERROR(EAGAIN), unless you forgot to enter draining mode.
132 * - Before decoding can be resumed again, the codec has to be reset with
133 * avcodec_flush_buffers().
134 *
135 * Using the API as outlined above is highly recommended. But it is also
136 * possible to call functions outside of this rigid schema. For example, you can
137 * call avcodec_send_packet() repeatedly without calling
138 * avcodec_receive_frame(). In this case, avcodec_send_packet() will succeed
139 * until the codec's internal buffer has been filled up (which is typically of
140 * size 1 per output frame, after initial input), and then reject input with
141 * AVERROR(EAGAIN). Once it starts rejecting input, you have no choice but to
142 * read at least some output.
143 *
144 * Not all codecs will follow a rigid and predictable dataflow; the only
145 * guarantee is that an AVERROR(EAGAIN) return value on a send/receive call on
146 * one end implies that a receive/send call on the other end will succeed, or
147 * at least will not fail with AVERROR(EAGAIN). In general, no codec will
148 * permit unlimited buffering of input or output.
149 *
150 * This API replaces the following legacy functions:
151 * - avcodec_decode_video2() and avcodec_decode_audio4():
152 * Use avcodec_send_packet() to feed input to the decoder, then use
153 * avcodec_receive_frame() to receive decoded frames after each packet.
154 * Unlike with the old video decoding API, multiple frames might result from
155 * a packet. For audio, splitting the input packet into frames by partially
156 * decoding packets becomes transparent to the API user. You never need to
157 * feed an AVPacket to the API twice (unless it is rejected with AVERROR(EAGAIN) - then
158 * no data was read from the packet).
159 * Additionally, sending a flush/draining packet is required only once.
160 * - avcodec_encode_video2()/avcodec_encode_audio2():
161 * Use avcodec_send_frame() to feed input to the encoder, then use
162 * avcodec_receive_packet() to receive encoded packets.
163 * Providing user-allocated buffers for avcodec_receive_packet() is not
164 * possible.
165 * - The new API does not handle subtitles yet.
166 *
167 * Mixing new and old function calls on the same AVCodecContext is not allowed,
168 * and will result in undefined behavior.
169 *
170 * Some codecs might require using the new API; using the old API will return
171 * an error when calling it. All codecs support the new API.
172 *
173 * A codec is not allowed to return AVERROR(EAGAIN) for both sending and receiving. This
174 * would be an invalid state, which could put the codec user into an endless
175 * loop. The API has no concept of time either: it cannot happen that trying to
176 * do avcodec_send_packet() results in AVERROR(EAGAIN), but a repeated call 1 second
177 * later accepts the packet (with no other receive/flush API calls involved).
178 * The API is a strict state machine, and the passage of time is not supposed
179 * to influence it. Some timing-dependent behavior might still be deemed
180 * acceptable in certain cases. But it must never result in both send/receive
181 * returning EAGAIN at the same time at any point. It must also absolutely be
182 * avoided that the current state is "unstable" and can "flip-flop" between
183 * the send/receive APIs allowing progress. For example, it's not allowed that
184 * the codec randomly decides that it actually wants to consume a packet now
185 * instead of returning a frame, after it just returned AVERROR(EAGAIN) on an
186 * avcodec_send_packet() call.
187 * @}
188 */
189
190/**
191 * @defgroup lavc_core Core functions/structures.
192 * @ingroup libavc
193 *
194 * Basic definitions, functions for querying libavcodec capabilities,
195 * allocating core structures, etc.
196 * @{
197 */
198
199
200/**
201 * Identify the syntax and semantics of the bitstream.
202 * The principle is roughly:
203 * Two decoders with the same ID can decode the same streams.
204 * Two encoders with the same ID can encode compatible streams.
205 * There may be slight deviations from the principle due to implementation
206 * details.
207 *
208 * If you add a codec ID to this list, add it so that
209 * 1. no value of an existing codec ID changes (that would break ABI),
210 * 2. it is as close as possible to similar codecs
211 *
212 * After adding new codec IDs, do not forget to add an entry to the codec
213 * descriptor list and bump libavcodec minor version.
214 */
217
218 /* video codecs */
220 AV_CODEC_ID_MPEG2VIDEO, ///< preferred ID for MPEG-1/2 video decoding
355#define AV_CODEC_ID_IFF_BYTERUN1 AV_CODEC_ID_IFF_ILBM
393#define AV_CODEC_ID_H265 AV_CODEC_ID_HEVC
413
460
461 /* various PCM "codecs" */
462 AV_CODEC_ID_FIRST_AUDIO = 0x10000, ///< A dummy id pointing at the start of audio codecs
494
500
501 /* various ADPCM codecs */
533
545
546 /* AMR */
549
550 /* RealAudio codecs*/
553
554 /* various DPCM codecs */
559
562
563 /* audio codecs */
565 AV_CODEC_ID_MP3, ///< preferred ID for decoding MPEG audio layer 1, 2 or 3
582 AV_CODEC_ID_GSM, ///< as in Berlin toast format
594 AV_CODEC_ID_GSM_MS, /* as found in WAV */
632
655
656 /* subtitle codecs */
657 AV_CODEC_ID_FIRST_SUBTITLE = 0x17000, ///< A dummy ID pointing at the start of subtitle codecs.
660 AV_CODEC_ID_TEXT, ///< raw UTF-8 text
667
685
686 /* other specific kind of codecs (generally used for attachments) */
687 AV_CODEC_ID_FIRST_UNKNOWN = 0x18000, ///< A dummy ID pointing at the start of various fake codecs.
689
690 AV_CODEC_ID_SCTE_35, ///< Contain timestamp estimated through PCR of program stream.
699
700
701 AV_CODEC_ID_PROBE = 0x19000, ///< codec_id is not known (like AV_CODEC_ID_NONE) but lavf should attempt to identify it
702
703 AV_CODEC_ID_MPEG2TS = 0x20000, /**< _FAKE_ codec to indicate a raw MPEG-2 TS
704 * stream (only used by libavformat) */
705 AV_CODEC_ID_MPEG4SYSTEMS = 0x20001, /**< _FAKE_ codec to indicate a MPEG-4 Systems
706 * stream (only used by libavformat) */
707 AV_CODEC_ID_FFMETADATA = 0x21000, ///< Dummy codec for streams containing only metadata information.
708 AV_CODEC_ID_WRAPPED_AVFRAME = 0x21001, ///< Passthrough codec, AVFrames wrapped in AVPacket
709};
710
711/**
712 * This struct describes the properties of a single codec described by an
713 * AVCodecID.
714 * @see avcodec_descriptor_get()
715 */
716typedef struct AVCodecDescriptor {
719 /**
720 * Name of the codec described by this descriptor. It is non-empty and
721 * unique for each codec descriptor. It should contain alphanumeric
722 * characters and '_' only.
723 */
724 const char *name;
725 /**
726 * A more descriptive name for this codec. May be NULL.
727 */
728 const char *long_name;
729 /**
730 * Codec properties, a combination of AV_CODEC_PROP_* flags.
731 */
732 int props;
733 /**
734 * MIME type(s) associated with the codec.
735 * May be NULL; if not, a NULL-terminated array of MIME types.
736 * The first item is always non-NULL and is the preferred MIME type.
737 */
738 const char *const *mime_types;
739 /**
740 * If non-NULL, an array of profiles recognized for this codec.
741 * Terminated with FF_PROFILE_UNKNOWN.
742 */
743 const struct AVProfile *profiles;
745
746/**
747 * Codec uses only intra compression.
748 * Video and audio codecs only.
749 */
750#define AV_CODEC_PROP_INTRA_ONLY (1 << 0)
751/**
752 * Codec supports lossy compression. Audio and video codecs only.
753 * @note a codec may support both lossy and lossless
754 * compression modes
755 */
756#define AV_CODEC_PROP_LOSSY (1 << 1)
757/**
758 * Codec supports lossless compression. Audio and video codecs only.
759 */
760#define AV_CODEC_PROP_LOSSLESS (1 << 2)
761/**
762 * Codec supports frame reordering. That is, the coded order (the order in which
763 * the encoded packets are output by the encoders / stored / input to the
764 * decoders) may be different from the presentation order of the corresponding
765 * frames.
766 *
767 * For codecs that do not have this property set, PTS and DTS should always be
768 * equal.
769 */
770#define AV_CODEC_PROP_REORDER (1 << 3)
771/**
772 * Subtitle codec is bitmap based
773 * Decoded AVSubtitle data can be read from the AVSubtitleRect->pict field.
774 */
775#define AV_CODEC_PROP_BITMAP_SUB (1 << 16)
776/**
777 * Subtitle codec is text based.
778 * Decoded AVSubtitle data can be read from the AVSubtitleRect->ass field.
779 */
780#define AV_CODEC_PROP_TEXT_SUB (1 << 17)
781
782/**
783 * @ingroup lavc_decoding
784 * Required number of additionally allocated bytes at the end of the input bitstream for decoding.
785 * This is mainly needed because some optimized bitstream readers read
786 * 32 or 64 bit at once and could read over the end.<br>
787 * Note: If the first 23 bits of the additional bytes are not 0, then damaged
788 * MPEG bitstreams could cause overread and segfault.
789 */
790#define AV_INPUT_BUFFER_PADDING_SIZE 64
791
792/**
793 * @ingroup lavc_encoding
794 * minimum encoding buffer size
795 * Used to avoid some checks during header writing.
796 */
797#define AV_INPUT_BUFFER_MIN_SIZE 16384
798
799/**
800 * @ingroup lavc_decoding
801 */
803 /* We leave some space between them for extensions (drop some
804 * keyframes for intra-only or drop just some bidir frames). */
805 AVDISCARD_NONE =-16, ///< discard nothing
806 AVDISCARD_DEFAULT = 0, ///< discard useless packets like 0 size packets in avi
807 AVDISCARD_NONREF = 8, ///< discard all non reference
808 AVDISCARD_BIDIR = 16, ///< discard all bidirectional frames
809 AVDISCARD_NONINTRA= 24, ///< discard all non intra frames
810 AVDISCARD_NONKEY = 32, ///< discard all frames except keyframes
811 AVDISCARD_ALL = 48, ///< discard all
812};
813
824 AV_AUDIO_SERVICE_TYPE_NB , ///< Not part of ABI
825};
826
827/**
828 * @ingroup lavc_encoding
829 */
830typedef struct RcOverride{
833 int qscale; // If this is 0 then quality_factor will be used instead.
835} RcOverride;
836
837/* encoding support
838 These flags can be passed in AVCodecContext.flags before initialization.
839 Note: Not everything is supported yet.
840*/
841
842/**
843 * Allow decoders to produce frames with data planes that are not aligned
844 * to CPU requirements (e.g. due to cropping).
845 */
846#define AV_CODEC_FLAG_UNALIGNED (1 << 0)
847/**
848 * Use fixed qscale.
849 */
850#define AV_CODEC_FLAG_QSCALE (1 << 1)
851/**
852 * 4 MV per MB allowed / advanced prediction for H.263.
853 */
854#define AV_CODEC_FLAG_4MV (1 << 2)
855/**
856 * Output even those frames that might be corrupted.
857 */
858#define AV_CODEC_FLAG_OUTPUT_CORRUPT (1 << 3)
859/**
860 * Use qpel MC.
861 */
862#define AV_CODEC_FLAG_QPEL (1 << 4)
863/**
864 * Don't output frames whose parameters differ from first
865 * decoded frame in stream.
866 */
867#define AV_CODEC_FLAG_DROPCHANGED (1 << 5)
868/**
869 * Use internal 2pass ratecontrol in first pass mode.
870 */
871#define AV_CODEC_FLAG_PASS1 (1 << 9)
872/**
873 * Use internal 2pass ratecontrol in second pass mode.
874 */
875#define AV_CODEC_FLAG_PASS2 (1 << 10)
876/**
877 * loop filter.
878 */
879#define AV_CODEC_FLAG_LOOP_FILTER (1 << 11)
880/**
881 * Only decode/encode grayscale.
882 */
883#define AV_CODEC_FLAG_GRAY (1 << 13)
884/**
885 * error[?] variables will be set during encoding.
886 */
887#define AV_CODEC_FLAG_PSNR (1 << 15)
888/**
889 * Input bitstream might be truncated at a random location
890 * instead of only at frame boundaries.
891 */
892#define AV_CODEC_FLAG_TRUNCATED (1 << 16)
893/**
894 * Use interlaced DCT.
895 */
896#define AV_CODEC_FLAG_INTERLACED_DCT (1 << 18)
897/**
898 * Force low delay.
899 */
900#define AV_CODEC_FLAG_LOW_DELAY (1 << 19)
901/**
902 * Place global headers in extradata instead of every keyframe.
903 */
904#define AV_CODEC_FLAG_GLOBAL_HEADER (1 << 22)
905/**
906 * Use only bitexact stuff (except (I)DCT).
907 */
908#define AV_CODEC_FLAG_BITEXACT (1 << 23)
909/* Fx : Flag for H.263+ extra options */
910/**
911 * H.263 advanced intra coding / MPEG-4 AC prediction
912 */
913#define AV_CODEC_FLAG_AC_PRED (1 << 24)
914/**
915 * interlaced motion estimation
916 */
917#define AV_CODEC_FLAG_INTERLACED_ME (1 << 29)
918#define AV_CODEC_FLAG_CLOSED_GOP (1U << 31)
919
920/**
921 * Allow non spec compliant speedup tricks.
922 */
923#define AV_CODEC_FLAG2_FAST (1 << 0)
924/**
925 * Skip bitstream encoding.
926 */
927#define AV_CODEC_FLAG2_NO_OUTPUT (1 << 2)
928/**
929 * Place global headers at every keyframe instead of in extradata.
930 */
931#define AV_CODEC_FLAG2_LOCAL_HEADER (1 << 3)
932
933/**
934 * timecode is in drop frame format. DEPRECATED!!!!
935 */
936#define AV_CODEC_FLAG2_DROP_FRAME_TIMECODE (1 << 13)
937
938/**
939 * Input bitstream might be truncated at a packet boundaries
940 * instead of only at frame boundaries.
941 */
942#define AV_CODEC_FLAG2_CHUNKS (1 << 15)
943/**
944 * Discard cropping information from SPS.
945 */
946#define AV_CODEC_FLAG2_IGNORE_CROP (1 << 16)
947
948/**
949 * Show all frames before the first keyframe
950 */
951#define AV_CODEC_FLAG2_SHOW_ALL (1 << 22)
952/**
953 * Export motion vectors through frame side data
954 */
955#define AV_CODEC_FLAG2_EXPORT_MVS (1 << 28)
956/**
957 * Do not skip samples and export skip information as frame side data
958 */
959#define AV_CODEC_FLAG2_SKIP_MANUAL (1 << 29)
960/**
961 * Do not reset ASS ReadOrder field on flush (subtitles decoding)
962 */
963#define AV_CODEC_FLAG2_RO_FLUSH_NOOP (1 << 30)
964
965/* Unsupported options :
966 * Syntax Arithmetic coding (SAC)
967 * Reference Picture Selection
968 * Independent Segment Decoding */
969/* /Fx */
970/* codec capabilities */
971
972/**
973 * Decoder can use draw_horiz_band callback.
974 */
975#define AV_CODEC_CAP_DRAW_HORIZ_BAND (1 << 0)
976/**
977 * Codec uses get_buffer() for allocating buffers and supports custom allocators.
978 * If not set, it might not use get_buffer() at all or use operations that
979 * assume the buffer was allocated by avcodec_default_get_buffer.
980 */
981#define AV_CODEC_CAP_DR1 (1 << 1)
982#define AV_CODEC_CAP_TRUNCATED (1 << 3)
983/**
984 * Encoder or decoder requires flushing with NULL input at the end in order to
985 * give the complete and correct output.
986 *
987 * NOTE: If this flag is not set, the codec is guaranteed to never be fed with
988 * with NULL data. The user can still send NULL data to the public encode
989 * or decode function, but libavcodec will not pass it along to the codec
990 * unless this flag is set.
991 *
992 * Decoders:
993 * The decoder has a non-zero delay and needs to be fed with avpkt->data=NULL,
994 * avpkt->size=0 at the end to get the delayed data until the decoder no longer
995 * returns frames.
996 *
997 * Encoders:
998 * The encoder needs to be fed with NULL data at the end of encoding until the
999 * encoder no longer returns data.
1000 *
1001 * NOTE: For encoders implementing the AVCodec.encode2() function, setting this
1002 * flag also means that the encoder must set the pts and duration for
1003 * each output packet. If this flag is not set, the pts and duration will
1004 * be determined by libavcodec from the input frame.
1005 */
1006#define AV_CODEC_CAP_DELAY (1 << 5)
1007/**
1008 * Codec can be fed a final frame with a smaller size.
1009 * This can be used to prevent truncation of the last audio samples.
1010 */
1011#define AV_CODEC_CAP_SMALL_LAST_FRAME (1 << 6)
1012
1013/**
1014 * Codec can output multiple frames per AVPacket
1015 * Normally demuxers return one frame at a time, demuxers which do not do
1016 * are connected to a parser to split what they return into proper frames.
1017 * This flag is reserved to the very rare category of codecs which have a
1018 * bitstream that cannot be split into frames without timeconsuming
1019 * operations like full decoding. Demuxers carrying such bitstreams thus
1020 * may return multiple frames in a packet. This has many disadvantages like
1021 * prohibiting stream copy in many cases thus it should only be considered
1022 * as a last resort.
1023 */
1024#define AV_CODEC_CAP_SUBFRAMES (1 << 8)
1025/**
1026 * Codec is experimental and is thus avoided in favor of non experimental
1027 * encoders
1028 */
1029#define AV_CODEC_CAP_EXPERIMENTAL (1 << 9)
1030/**
1031 * Codec should fill in channel configuration and samplerate instead of container
1032 */
1033#define AV_CODEC_CAP_CHANNEL_CONF (1 << 10)
1034/**
1035 * Codec supports frame-level multithreading.
1036 */
1037#define AV_CODEC_CAP_FRAME_THREADS (1 << 12)
1038/**
1039 * Codec supports slice-based (or partition-based) multithreading.
1040 */
1041#define AV_CODEC_CAP_SLICE_THREADS (1 << 13)
1042/**
1043 * Codec supports changed parameters at any point.
1044 */
1045#define AV_CODEC_CAP_PARAM_CHANGE (1 << 14)
1046/**
1047 * Codec supports avctx->thread_count == 0 (auto).
1048 */
1049#define AV_CODEC_CAP_AUTO_THREADS (1 << 15)
1050/**
1051 * Audio encoder supports receiving a different number of samples in each call.
1052 */
1053#define AV_CODEC_CAP_VARIABLE_FRAME_SIZE (1 << 16)
1054/**
1055 * Decoder is not a preferred choice for probing.
1056 * This indicates that the decoder is not a good choice for probing.
1057 * It could for example be an expensive to spin up hardware decoder,
1058 * or it could simply not provide a lot of useful information about
1059 * the stream.
1060 * A decoder marked with this flag should only be used as last resort
1061 * choice for probing.
1062 */
1063#define AV_CODEC_CAP_AVOID_PROBING (1 << 17)
1064/**
1065 * Codec is intra only.
1066 */
1067#define AV_CODEC_CAP_INTRA_ONLY 0x40000000
1068/**
1069 * Codec is lossless.
1070 */
1071#define AV_CODEC_CAP_LOSSLESS 0x80000000
1072
1073/**
1074 * Codec is backed by a hardware implementation. Typically used to
1075 * identify a non-hwaccel hardware decoder. For information about hwaccels, use
1076 * avcodec_get_hw_config() instead.
1077 */
1078#define AV_CODEC_CAP_HARDWARE (1 << 18)
1079
1080/**
1081 * Codec is potentially backed by a hardware implementation, but not
1082 * necessarily. This is used instead of AV_CODEC_CAP_HARDWARE, if the
1083 * implementation provides some sort of internal fallback.
1084 */
1085#define AV_CODEC_CAP_HYBRID (1 << 19)
1086
1087/**
1088 * This codec takes the reordered_opaque field from input AVFrames
1089 * and returns it in the corresponding field in AVCodecContext after
1090 * encoding.
1091 */
1092#define AV_CODEC_CAP_ENCODER_REORDERED_OPAQUE (1 << 20)
1093
1094/**
1095 * Pan Scan area.
1096 * This specifies the area which should be displayed.
1097 * Note there may be multiple such areas for one frame.
1098 */
1099typedef struct AVPanScan {
1100 /**
1101 * id
1102 * - encoding: Set by user.
1103 * - decoding: Set by libavcodec.
1104 */
1105 int id;
1106
1107 /**
1108 * width and height in 1/16 pel
1109 * - encoding: Set by user.
1110 * - decoding: Set by libavcodec.
1111 */
1114
1115 /**
1116 * position of the top left corner in 1/16 pel for up to 3 fields/frames
1117 * - encoding: Set by user.
1118 * - decoding: Set by libavcodec.
1119 */
1120 int16_t position[3][2];
1121} AVPanScan;
1122
1123/**
1124 * This structure describes the bitrate properties of an encoded bitstream. It
1125 * roughly corresponds to a subset the VBV parameters for MPEG-2 or HRD
1126 * parameters for H.264/HEVC.
1127 */
1128typedef struct AVCPBProperties {
1129 /**
1130 * Maximum bitrate of the stream, in bits per second.
1131 * Zero if unknown or unspecified.
1132 */
1133#if FF_API_UNSANITIZED_BITRATES
1135#else
1136 int64_t max_bitrate;
1137#endif
1138 /**
1139 * Minimum bitrate of the stream, in bits per second.
1140 * Zero if unknown or unspecified.
1141 */
1142#if FF_API_UNSANITIZED_BITRATES
1144#else
1145 int64_t min_bitrate;
1146#endif
1147 /**
1148 * Average bitrate of the stream, in bits per second.
1149 * Zero if unknown or unspecified.
1150 */
1151#if FF_API_UNSANITIZED_BITRATES
1153#else
1154 int64_t avg_bitrate;
1155#endif
1156
1157 /**
1158 * The size of the buffer to which the ratecontrol is applied, in bits.
1159 * Zero if unknown or unspecified.
1160 */
1162
1163 /**
1164 * The delay between the time the packet this structure is associated with
1165 * is received and the time when it should be decoded, in periods of a 27MHz
1166 * clock.
1167 *
1168 * UINT64_MAX when unknown or unspecified.
1169 */
1170 uint64_t vbv_delay;
1172
1173/**
1174 * The decoder will keep a reference to the frame and may reuse it later.
1175 */
1176#define AV_GET_BUFFER_FLAG_REF (1 << 0)
1177
1178/**
1179 * @defgroup lavc_packet AVPacket
1180 *
1181 * Types and functions for working with AVPacket.
1182 * @{
1183 */
1185 /**
1186 * An AV_PKT_DATA_PALETTE side data packet contains exactly AVPALETTE_SIZE
1187 * bytes worth of palette. This side data signals that a new palette is
1188 * present.
1189 */
1191
1192 /**
1193 * The AV_PKT_DATA_NEW_EXTRADATA is used to notify the codec or the format
1194 * that the extradata buffer was changed and the receiving side should
1195 * act upon it appropriately. The new extradata is embedded in the side
1196 * data buffer and should be immediately used for processing the current
1197 * frame or packet.
1198 */
1200
1201 /**
1202 * An AV_PKT_DATA_PARAM_CHANGE side data packet is laid out as follows:
1203 * @code
1204 * u32le param_flags
1205 * if (param_flags & AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_COUNT)
1206 * s32le channel_count
1207 * if (param_flags & AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_LAYOUT)
1208 * u64le channel_layout
1209 * if (param_flags & AV_SIDE_DATA_PARAM_CHANGE_SAMPLE_RATE)
1210 * s32le sample_rate
1211 * if (param_flags & AV_SIDE_DATA_PARAM_CHANGE_DIMENSIONS)
1212 * s32le width
1213 * s32le height
1214 * @endcode
1215 */
1217
1218 /**
1219 * An AV_PKT_DATA_H263_MB_INFO side data packet contains a number of
1220 * structures with info about macroblocks relevant to splitting the
1221 * packet into smaller packets on macroblock edges (e.g. as for RFC 2190).
1222 * That is, it does not necessarily contain info about all macroblocks,
1223 * as long as the distance between macroblocks in the info is smaller
1224 * than the target payload size.
1225 * Each MB info structure is 12 bytes, and is laid out as follows:
1226 * @code
1227 * u32le bit offset from the start of the packet
1228 * u8 current quantizer at the start of the macroblock
1229 * u8 GOB number
1230 * u16le macroblock address within the GOB
1231 * u8 horizontal MV predictor
1232 * u8 vertical MV predictor
1233 * u8 horizontal MV predictor for block number 3
1234 * u8 vertical MV predictor for block number 3
1235 * @endcode
1236 */
1238
1239 /**
1240 * This side data should be associated with an audio stream and contains
1241 * ReplayGain information in form of the AVReplayGain struct.
1242 */
1244
1245 /**
1246 * This side data contains a 3x3 transformation matrix describing an affine
1247 * transformation that needs to be applied to the decoded video frames for
1248 * correct presentation.
1249 *
1250 * See libavutil/display.h for a detailed description of the data.
1251 */
1253
1254 /**
1255 * This side data should be associated with a video stream and contains
1256 * Stereoscopic 3D information in form of the AVStereo3D struct.
1257 */
1259
1260 /**
1261 * This side data should be associated with an audio stream and corresponds
1262 * to enum AVAudioServiceType.
1263 */
1265
1266 /**
1267 * This side data contains quality related information from the encoder.
1268 * @code
1269 * u32le quality factor of the compressed frame. Allowed range is between 1 (good) and FF_LAMBDA_MAX (bad).
1270 * u8 picture type
1271 * u8 error count
1272 * u16 reserved
1273 * u64le[error count] sum of squared differences between encoder in and output
1274 * @endcode
1275 */
1277
1278 /**
1279 * This side data contains an integer value representing the stream index
1280 * of a "fallback" track. A fallback track indicates an alternate
1281 * track to use when the current track can not be decoded for some reason.
1282 * e.g. no decoder available for codec.
1283 */
1285
1286 /**
1287 * This side data corresponds to the AVCPBProperties struct.
1288 */
1290
1291 /**
1292 * Recommmends skipping the specified number of samples
1293 * @code
1294 * u32le number of samples to skip from start of this packet
1295 * u32le number of samples to skip from end of this packet
1296 * u8 reason for start skip
1297 * u8 reason for end skip (0=padding silence, 1=convergence)
1298 * @endcode
1299 */
1301
1302 /**
1303 * An AV_PKT_DATA_JP_DUALMONO side data packet indicates that
1304 * the packet may contain "dual mono" audio specific to Japanese DTV
1305 * and if it is true, recommends only the selected channel to be used.
1306 * @code
1307 * u8 selected channels (0=mail/left, 1=sub/right, 2=both)
1308 * @endcode
1309 */
1311
1312 /**
1313 * A list of zero terminated key/value strings. There is no end marker for
1314 * the list, so it is required to rely on the side data size to stop.
1315 */
1317
1318 /**
1319 * Subtitle event position
1320 * @code
1321 * u32le x1
1322 * u32le y1
1323 * u32le x2
1324 * u32le y2
1325 * @endcode
1326 */
1328
1329 /**
1330 * Data found in BlockAdditional element of matroska container. There is
1331 * no end marker for the data, so it is required to rely on the side data
1332 * size to recognize the end. 8 byte id (as found in BlockAddId) followed
1333 * by data.
1334 */
1336
1337 /**
1338 * The optional first identifier line of a WebVTT cue.
1339 */
1341
1342 /**
1343 * The optional settings (rendering instructions) that immediately
1344 * follow the timestamp specifier of a WebVTT cue.
1345 */
1347
1348 /**
1349 * A list of zero terminated key/value strings. There is no end marker for
1350 * the list, so it is required to rely on the side data size to stop. This
1351 * side data includes updated metadata which appeared in the stream.
1352 */
1354
1355 /**
1356 * MPEGTS stream ID as uint8_t, this is required to pass the stream ID
1357 * information from the demuxer to the corresponding muxer.
1358 */
1360
1361 /**
1362 * Mastering display metadata (based on SMPTE-2086:2014). This metadata
1363 * should be associated with a video stream and contains data in the form
1364 * of the AVMasteringDisplayMetadata struct.
1365 */
1367
1368 /**
1369 * This side data should be associated with a video stream and corresponds
1370 * to the AVSphericalMapping structure.
1371 */
1373
1374 /**
1375 * Content light level (based on CTA-861.3). This metadata should be
1376 * associated with a video stream and contains data in the form of the
1377 * AVContentLightMetadata struct.
1378 */
1380
1381 /**
1382 * ATSC A53 Part 4 Closed Captions. This metadata should be associated with
1383 * a video stream. A53 CC bitstream is stored as uint8_t in AVPacketSideData.data.
1384 * The number of bytes of CC data is AVPacketSideData.size.
1385 */
1387
1388 /**
1389 * This side data is encryption initialization data.
1390 * The format is not part of ABI, use av_encryption_init_info_* methods to
1391 * access.
1392 */
1394
1395 /**
1396 * This side data contains encryption info for how to decrypt the packet.
1397 * The format is not part of ABI, use av_encryption_info_* methods to access.
1398 */
1400
1401 /**
1402 * Active Format Description data consisting of a single byte as specified
1403 * in ETSI TS 101 154 using AVActiveFormatDescription enum.
1404 */
1406
1407 /**
1408 * The number of side data types.
1409 * This is not part of the public API/ABI in the sense that it may
1410 * change when new side data types are added.
1411 * This must stay the last enum value.
1412 * If its value becomes huge, some code using it
1413 * needs to be updated as it assumes it to be smaller than other limits.
1414 */
1417
1418#define AV_PKT_DATA_QUALITY_FACTOR AV_PKT_DATA_QUALITY_STATS //DEPRECATED
1419
1420typedef struct AVPacketSideData {
1421 uint8_t *data;
1422 int size;
1425
1426/**
1427 * This structure stores compressed data. It is typically exported by demuxers
1428 * and then passed as input to decoders, or received as output from encoders and
1429 * then passed to muxers.
1430 *
1431 * For video, it should typically contain one compressed frame. For audio it may
1432 * contain several compressed frames. Encoders are allowed to output empty
1433 * packets, with no compressed data, containing only side data
1434 * (e.g. to update some stream parameters at the end of encoding).
1435 *
1436 * AVPacket is one of the few structs in FFmpeg, whose size is a part of public
1437 * ABI. Thus it may be allocated on stack and no new fields can be added to it
1438 * without libavcodec and libavformat major bump.
1439 *
1440 * The semantics of data ownership depends on the buf field.
1441 * If it is set, the packet data is dynamically allocated and is
1442 * valid indefinitely until a call to av_packet_unref() reduces the
1443 * reference count to 0.
1444 *
1445 * If the buf field is not set av_packet_ref() would make a copy instead
1446 * of increasing the reference count.
1447 *
1448 * The side data is always allocated with av_malloc(), copied by
1449 * av_packet_ref() and freed by av_packet_unref().
1450 *
1451 * @see av_packet_ref
1452 * @see av_packet_unref
1453 */
1454typedef struct AVPacket {
1455 /**
1456 * A reference to the reference-counted buffer where the packet data is
1457 * stored.
1458 * May be NULL, then the packet data is not reference-counted.
1459 */
1461 /**
1462 * Presentation timestamp in AVStream->time_base units; the time at which
1463 * the decompressed packet will be presented to the user.
1464 * Can be AV_NOPTS_VALUE if it is not stored in the file.
1465 * pts MUST be larger or equal to dts as presentation cannot happen before
1466 * decompression, unless one wants to view hex dumps. Some formats misuse
1467 * the terms dts and pts/cts to mean something different. Such timestamps
1468 * must be converted to true pts/dts before they are stored in AVPacket.
1469 */
1470 int64_t pts;
1471 /**
1472 * Decompression timestamp in AVStream->time_base units; the time at which
1473 * the packet is decompressed.
1474 * Can be AV_NOPTS_VALUE if it is not stored in the file.
1475 */
1476 int64_t dts;
1477 uint8_t *data;
1478 int size;
1480 /**
1481 * A combination of AV_PKT_FLAG values
1482 */
1484 /**
1485 * Additional packet data that can be provided by the container.
1486 * Packet can contain several types of side information.
1487 */
1490
1491 /**
1492 * Duration of this packet in AVStream->time_base units, 0 if unknown.
1493 * Equals next_pts - this_pts in presentation order.
1494 */
1495 int64_t duration;
1496
1497 int64_t pos; ///< byte position in stream, -1 if unknown
1498
1499#if FF_API_CONVERGENCE_DURATION
1500 /**
1501 * @deprecated Same as the duration field, but as int64_t. This was required
1502 * for Matroska subtitles, whose duration values could overflow when the
1503 * duration field was still an int.
1504 */
1507#endif
1508} AVPacket;
1509#define AV_PKT_FLAG_KEY 0x0001 ///< The packet contains a keyframe
1510#define AV_PKT_FLAG_CORRUPT 0x0002 ///< The packet content is corrupted
1511/**
1512 * Flag is used to discard packets which are required to maintain valid
1513 * decoder state but are not required for output and should be dropped
1514 * after decoding.
1515 **/
1516#define AV_PKT_FLAG_DISCARD 0x0004
1517/**
1518 * The packet comes from a trusted source.
1519 *
1520 * Otherwise-unsafe constructs such as arbitrary pointers to data
1521 * outside the packet may be followed.
1522 */
1523#define AV_PKT_FLAG_TRUSTED 0x0008
1524/**
1525 * Flag is used to indicate packets that contain frames that can
1526 * be discarded by the decoder. I.e. Non-reference frames.
1527 */
1528#define AV_PKT_FLAG_DISPOSABLE 0x0010
1529
1530
1536};
1537/**
1538 * @}
1539 */
1540
1541struct AVCodecInternal;
1542
1546 AV_FIELD_TT, //< Top coded_first, top displayed first
1547 AV_FIELD_BB, //< Bottom coded first, bottom displayed first
1548 AV_FIELD_TB, //< Top coded first, bottom displayed first
1549 AV_FIELD_BT, //< Bottom coded first, top displayed first
1550};
1551
1552/**
1553 * main external API structure.
1554 * New fields can be added to the end with minor version bumps.
1555 * Removal, reordering and changes to existing fields require a major
1556 * version bump.
1557 * You can use AVOptions (av_opt* / av_set/get*()) to access these fields from user
1558 * applications.
1559 * The name string for AVOptions options matches the associated command line
1560 * parameter name and can be found in libavcodec/options_table.h
1561 * The AVOption/command line parameter names differ in some cases from the C
1562 * structure field names for historic reasons or brevity.
1563 * sizeof(AVCodecContext) must not be used outside libav*.
1564 */
1565typedef struct AVCodecContext {
1566 /**
1567 * information on struct for av_log
1568 * - set by avcodec_alloc_context3
1569 */
1572
1573 enum AVMediaType codec_type; /* see AVMEDIA_TYPE_xxx */
1574 const struct AVCodec *codec;
1575 enum AVCodecID codec_id; /* see AV_CODEC_ID_xxx */
1576
1577 /**
1578 * fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
1579 * This is used to work around some encoder bugs.
1580 * A demuxer should set this to what is stored in the field used to identify the codec.
1581 * If there are multiple such fields in a container then the demuxer should choose the one
1582 * which maximizes the information about the used codec.
1583 * If the codec tag field in a container is larger than 32 bits then the demuxer should
1584 * remap the longer ID to 32 bits with a table or other structure. Alternatively a new
1585 * extra_codec_tag + size could be added but for this a clear advantage must be demonstrated
1586 * first.
1587 * - encoding: Set by user, if not then the default based on codec_id will be used.
1588 * - decoding: Set by user, will be converted to uppercase by libavcodec during init.
1589 */
1590 unsigned int codec_tag;
1591
1593
1594 /**
1595 * Private context used for internal data.
1596 *
1597 * Unlike priv_data, this is not codec-specific. It is used in general
1598 * libavcodec functions.
1599 */
1600 struct AVCodecInternal *internal;
1601
1602 /**
1603 * Private data of the user, can be used to carry app specific stuff.
1604 * - encoding: Set by user.
1605 * - decoding: Set by user.
1606 */
1607 void *opaque;
1608
1609 /**
1610 * the average bitrate
1611 * - encoding: Set by user; unused for constant quantizer encoding.
1612 * - decoding: Set by user, may be overwritten by libavcodec
1613 * if this info is available in the stream
1614 */
1615 int64_t bit_rate;
1616
1617 /**
1618 * number of bits the bitstream is allowed to diverge from the reference.
1619 * the reference can be CBR (for CBR pass1) or VBR (for pass2)
1620 * - encoding: Set by user; unused for constant quantizer encoding.
1621 * - decoding: unused
1622 */
1624
1625 /**
1626 * Global quality for codecs which cannot change it per frame.
1627 * This should be proportional to MPEG-1/2/4 qscale.
1628 * - encoding: Set by user.
1629 * - decoding: unused
1630 */
1632
1633 /**
1634 * - encoding: Set by user.
1635 * - decoding: unused
1636 */
1638#define FF_COMPRESSION_DEFAULT -1
1639
1640 /**
1641 * AV_CODEC_FLAG_*.
1642 * - encoding: Set by user.
1643 * - decoding: Set by user.
1644 */
1646
1647 /**
1648 * AV_CODEC_FLAG2_*
1649 * - encoding: Set by user.
1650 * - decoding: Set by user.
1651 */
1653
1654 /**
1655 * some codecs need / can use extradata like Huffman tables.
1656 * MJPEG: Huffman tables
1657 * rv10: additional flags
1658 * MPEG-4: global headers (they can be in the bitstream or here)
1659 * The allocated memory should be AV_INPUT_BUFFER_PADDING_SIZE bytes larger
1660 * than extradata_size to avoid problems if it is read with the bitstream reader.
1661 * The bytewise contents of extradata must not depend on the architecture or CPU endianness.
1662 * Must be allocated with the av_malloc() family of functions.
1663 * - encoding: Set/allocated/freed by libavcodec.
1664 * - decoding: Set/allocated/freed by user.
1665 */
1666 uint8_t *extradata;
1668
1669 /**
1670 * This is the fundamental unit of time (in seconds) in terms
1671 * of which frame timestamps are represented. For fixed-fps content,
1672 * timebase should be 1/framerate and timestamp increments should be
1673 * identically 1.
1674 * This often, but not always is the inverse of the frame rate or field rate
1675 * for video. 1/time_base is not the average frame rate if the frame rate is not
1676 * constant.
1677 *
1678 * Like containers, elementary streams also can store timestamps, 1/time_base
1679 * is the unit in which these timestamps are specified.
1680 * As example of such codec time base see ISO/IEC 14496-2:2001(E)
1681 * vop_time_increment_resolution and fixed_vop_rate
1682 * (fixed_vop_rate == 0 implies that it is different from the framerate)
1683 *
1684 * - encoding: MUST be set by user.
1685 * - decoding: the use of this field for decoding is deprecated.
1686 * Use framerate instead.
1687 */
1689
1690 /**
1691 * For some codecs, the time base is closer to the field rate than the frame rate.
1692 * Most notably, H.264 and MPEG-2 specify time_base as half of frame duration
1693 * if no telecine is used ...
1694 *
1695 * Set to time_base ticks per frame. Default 1, e.g., H.264/MPEG-2 set it to 2.
1696 */
1698
1699 /**
1700 * Codec delay.
1701 *
1702 * Encoding: Number of frames delay there will be from the encoder input to
1703 * the decoder output. (we assume the decoder matches the spec)
1704 * Decoding: Number of frames delay in addition to what a standard decoder
1705 * as specified in the spec would produce.
1706 *
1707 * Video:
1708 * Number of frames the decoded output will be delayed relative to the
1709 * encoded input.
1710 *
1711 * Audio:
1712 * For encoding, this field is unused (see initial_padding).
1713 *
1714 * For decoding, this is the number of samples the decoder needs to
1715 * output before the decoder's output is valid. When seeking, you should
1716 * start decoding this many samples prior to your desired seek point.
1717 *
1718 * - encoding: Set by libavcodec.
1719 * - decoding: Set by libavcodec.
1720 */
1722
1723
1724 /* video only */
1725 /**
1726 * picture width / height.
1727 *
1728 * @note Those fields may not match the values of the last
1729 * AVFrame output by avcodec_decode_video2 due frame
1730 * reordering.
1731 *
1732 * - encoding: MUST be set by user.
1733 * - decoding: May be set by the user before opening the decoder if known e.g.
1734 * from the container. Some decoders will require the dimensions
1735 * to be set by the caller. During decoding, the decoder may
1736 * overwrite those values as required while parsing the data.
1737 */
1739
1740 /**
1741 * Bitstream width / height, may be different from width/height e.g. when
1742 * the decoded frame is cropped before being output or lowres is enabled.
1743 *
1744 * @note Those field may not match the value of the last
1745 * AVFrame output by avcodec_receive_frame() due frame
1746 * reordering.
1747 *
1748 * - encoding: unused
1749 * - decoding: May be set by the user before opening the decoder if known
1750 * e.g. from the container. During decoding, the decoder may
1751 * overwrite those values as required while parsing the data.
1752 */
1754
1755 /**
1756 * the number of pictures in a group of pictures, or 0 for intra_only
1757 * - encoding: Set by user.
1758 * - decoding: unused
1759 */
1761
1762 /**
1763 * Pixel format, see AV_PIX_FMT_xxx.
1764 * May be set by the demuxer if known from headers.
1765 * May be overridden by the decoder if it knows better.
1766 *
1767 * @note This field may not match the value of the last
1768 * AVFrame output by avcodec_receive_frame() due frame
1769 * reordering.
1770 *
1771 * - encoding: Set by user.
1772 * - decoding: Set by user if known, overridden by libavcodec while
1773 * parsing the data.
1774 */
1776
1777 /**
1778 * If non NULL, 'draw_horiz_band' is called by the libavcodec
1779 * decoder to draw a horizontal band. It improves cache usage. Not
1780 * all codecs can do that. You must check the codec capabilities
1781 * beforehand.
1782 * When multithreading is used, it may be called from multiple threads
1783 * at the same time; threads might draw different parts of the same AVFrame,
1784 * or multiple AVFrames, and there is no guarantee that slices will be drawn
1785 * in order.
1786 * The function is also used by hardware acceleration APIs.
1787 * It is called at least once during frame decoding to pass
1788 * the data needed for hardware render.
1789 * In that mode instead of pixel data, AVFrame points to
1790 * a structure specific to the acceleration API. The application
1791 * reads the structure and can change some fields to indicate progress
1792 * or mark state.
1793 * - encoding: unused
1794 * - decoding: Set by user.
1795 * @param height the height of the slice
1796 * @param y the y position of the slice
1797 * @param type 1->top field, 2->bottom field, 3->frame
1798 * @param offset offset into the AVFrame.data from which the slice should be read
1799 */
1801 const AVFrame *src, int offset[AV_NUM_DATA_POINTERS],
1802 int y, int type, int height);
1803
1804 /**
1805 * callback to negotiate the pixelFormat
1806 * @param fmt is the list of formats which are supported by the codec,
1807 * it is terminated by -1 as 0 is a valid format, the formats are ordered by quality.
1808 * The first is always the native one.
1809 * @note The callback may be called again immediately if initialization for
1810 * the selected (hardware-accelerated) pixel format failed.
1811 * @warning Behavior is undefined if the callback returns a value not
1812 * in the fmt list of formats.
1813 * @return the chosen format
1814 * - encoding: unused
1815 * - decoding: Set by user, if not set the native format will be chosen.
1816 */
1817 enum AVPixelFormat (*get_format)(struct AVCodecContext *s, const enum AVPixelFormat * fmt);
1818
1819 /**
1820 * maximum number of B-frames between non-B-frames
1821 * Note: The output will be delayed by max_b_frames+1 relative to the input.
1822 * - encoding: Set by user.
1823 * - decoding: unused
1824 */
1826
1827 /**
1828 * qscale factor between IP and B-frames
1829 * If > 0 then the last P-frame quantizer will be used (q= lastp_q*factor+offset).
1830 * If < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset).
1831 * - encoding: Set by user.
1832 * - decoding: unused
1833 */
1835
1836#if FF_API_PRIVATE_OPT
1837 /** @deprecated use encoder private options instead */
1840#endif
1841
1842 /**
1843 * qscale offset between IP and B-frames
1844 * - encoding: Set by user.
1845 * - decoding: unused
1846 */
1848
1849 /**
1850 * Size of the frame reordering buffer in the decoder.
1851 * For MPEG-2 it is 1 IPB or 0 low delay IP.
1852 * - encoding: Set by libavcodec.
1853 * - decoding: Set by libavcodec.
1854 */
1856
1857#if FF_API_PRIVATE_OPT
1858 /** @deprecated use encoder private options instead */
1861#endif
1862
1863 /**
1864 * qscale factor between P- and I-frames
1865 * If > 0 then the last P-frame quantizer will be used (q = lastp_q * factor + offset).
1866 * If < 0 then normal ratecontrol will be done (q= -normal_q*factor+offset).
1867 * - encoding: Set by user.
1868 * - decoding: unused
1869 */
1871
1872 /**
1873 * qscale offset between P and I-frames
1874 * - encoding: Set by user.
1875 * - decoding: unused
1876 */
1878
1879 /**
1880 * luminance masking (0-> disabled)
1881 * - encoding: Set by user.
1882 * - decoding: unused
1883 */
1885
1886 /**
1887 * temporary complexity masking (0-> disabled)
1888 * - encoding: Set by user.
1889 * - decoding: unused
1890 */
1892
1893 /**
1894 * spatial complexity masking (0-> disabled)
1895 * - encoding: Set by user.
1896 * - decoding: unused
1897 */
1899
1900 /**
1901 * p block masking (0-> disabled)
1902 * - encoding: Set by user.
1903 * - decoding: unused
1904 */
1906
1907 /**
1908 * darkness masking (0-> disabled)
1909 * - encoding: Set by user.
1910 * - decoding: unused
1911 */
1913
1914 /**
1915 * slice count
1916 * - encoding: Set by libavcodec.
1917 * - decoding: Set by user (or 0).
1918 */
1920
1921#if FF_API_PRIVATE_OPT
1922 /** @deprecated use encoder private options instead */
1925#define FF_PRED_LEFT 0
1926#define FF_PRED_PLANE 1
1927#define FF_PRED_MEDIAN 2
1928#endif
1929
1930 /**
1931 * slice offsets in the frame in bytes
1932 * - encoding: Set/allocated by libavcodec.
1933 * - decoding: Set/allocated by user (or NULL).
1934 */
1936
1937 /**
1938 * sample aspect ratio (0 if unknown)
1939 * That is the width of a pixel divided by the height of the pixel.
1940 * Numerator and denominator must be relatively prime and smaller than 256 for some video standards.
1941 * - encoding: Set by user.
1942 * - decoding: Set by libavcodec.
1943 */
1945
1946 /**
1947 * motion estimation comparison function
1948 * - encoding: Set by user.
1949 * - decoding: unused
1950 */
1952 /**
1953 * subpixel motion estimation comparison function
1954 * - encoding: Set by user.
1955 * - decoding: unused
1956 */
1958 /**
1959 * macroblock comparison function (not supported yet)
1960 * - encoding: Set by user.
1961 * - decoding: unused
1962 */
1964 /**
1965 * interlaced DCT comparison function
1966 * - encoding: Set by user.
1967 * - decoding: unused
1968 */
1970#define FF_CMP_SAD 0
1971#define FF_CMP_SSE 1
1972#define FF_CMP_SATD 2
1973#define FF_CMP_DCT 3
1974#define FF_CMP_PSNR 4
1975#define FF_CMP_BIT 5
1976#define FF_CMP_RD 6
1977#define FF_CMP_ZERO 7
1978#define FF_CMP_VSAD 8
1979#define FF_CMP_VSSE 9
1980#define FF_CMP_NSSE 10
1981#define FF_CMP_W53 11
1982#define FF_CMP_W97 12
1983#define FF_CMP_DCTMAX 13
1984#define FF_CMP_DCT264 14
1985#define FF_CMP_MEDIAN_SAD 15
1986#define FF_CMP_CHROMA 256
1987
1988 /**
1989 * ME diamond size & shape
1990 * - encoding: Set by user.
1991 * - decoding: unused
1992 */
1994
1995 /**
1996 * amount of previous MV predictors (2a+1 x 2a+1 square)
1997 * - encoding: Set by user.
1998 * - decoding: unused
1999 */
2001
2002#if FF_API_PRIVATE_OPT
2003 /** @deprecated use encoder private options instead */
2006#endif
2007
2008 /**
2009 * motion estimation prepass comparison function
2010 * - encoding: Set by user.
2011 * - decoding: unused
2012 */
2014
2015 /**
2016 * ME prepass diamond size & shape
2017 * - encoding: Set by user.
2018 * - decoding: unused
2019 */
2021
2022 /**
2023 * subpel ME quality
2024 * - encoding: Set by user.
2025 * - decoding: unused
2026 */
2028
2029 /**
2030 * maximum motion estimation search range in subpel units
2031 * If 0 then no limit.
2032 *
2033 * - encoding: Set by user.
2034 * - decoding: unused
2035 */
2037
2038 /**
2039 * slice flags
2040 * - encoding: unused
2041 * - decoding: Set by user.
2042 */
2044#define SLICE_FLAG_CODED_ORDER 0x0001 ///< draw_horiz_band() is called in coded order instead of display
2045#define SLICE_FLAG_ALLOW_FIELD 0x0002 ///< allow draw_horiz_band() with field slices (MPEG-2 field pics)
2046#define SLICE_FLAG_ALLOW_PLANE 0x0004 ///< allow draw_horiz_band() with 1 component at a time (SVQ1)
2047
2048 /**
2049 * macroblock decision mode
2050 * - encoding: Set by user.
2051 * - decoding: unused
2052 */
2054#define FF_MB_DECISION_SIMPLE 0 ///< uses mb_cmp
2055#define FF_MB_DECISION_BITS 1 ///< chooses the one which needs the fewest bits
2056#define FF_MB_DECISION_RD 2 ///< rate distortion
2057
2058 /**
2059 * custom intra quantization matrix
2060 * Must be allocated with the av_malloc() family of functions, and will be freed in
2061 * avcodec_free_context().
2062 * - encoding: Set/allocated by user, freed by libavcodec. Can be NULL.
2063 * - decoding: Set/allocated/freed by libavcodec.
2064 */
2065 uint16_t *intra_matrix;
2066
2067 /**
2068 * custom inter quantization matrix
2069 * Must be allocated with the av_malloc() family of functions, and will be freed in
2070 * avcodec_free_context().
2071 * - encoding: Set/allocated by user, freed by libavcodec. Can be NULL.
2072 * - decoding: Set/allocated/freed by libavcodec.
2073 */
2074 uint16_t *inter_matrix;
2075
2076#if FF_API_PRIVATE_OPT
2077 /** @deprecated use encoder private options instead */
2080
2081 /** @deprecated use encoder private options instead */
2084#endif
2085
2086 /**
2087 * precision of the intra DC coefficient - 8
2088 * - encoding: Set by user.
2089 * - decoding: Set by libavcodec
2090 */
2092
2093 /**
2094 * Number of macroblock rows at the top which are skipped.
2095 * - encoding: unused
2096 * - decoding: Set by user.
2097 */
2099
2100 /**
2101 * Number of macroblock rows at the bottom which are skipped.
2102 * - encoding: unused
2103 * - decoding: Set by user.
2104 */
2106
2107 /**
2108 * minimum MB Lagrange multiplier
2109 * - encoding: Set by user.
2110 * - decoding: unused
2111 */
2113
2114 /**
2115 * maximum MB Lagrange multiplier
2116 * - encoding: Set by user.
2117 * - decoding: unused
2118 */
2120
2121#if FF_API_PRIVATE_OPT
2122 /**
2123 * @deprecated use encoder private options instead
2124 */
2127#endif
2128
2129 /**
2130 * - encoding: Set by user.
2131 * - decoding: unused
2132 */
2134
2135#if FF_API_PRIVATE_OPT
2136 /** @deprecated use encoder private options instead */
2139#endif
2140
2141 /**
2142 * minimum GOP size
2143 * - encoding: Set by user.
2144 * - decoding: unused
2145 */
2147
2148 /**
2149 * number of reference frames
2150 * - encoding: Set by user.
2151 * - decoding: Set by lavc.
2152 */
2153 int refs;
2154
2155#if FF_API_PRIVATE_OPT
2156 /** @deprecated use encoder private options instead */
2159#endif
2160
2161 /**
2162 * Note: Value depends upon the compare function used for fullpel ME.
2163 * - encoding: Set by user.
2164 * - decoding: unused
2165 */
2167
2168#if FF_API_PRIVATE_OPT
2169 /** @deprecated use encoder private options instead */
2172#endif
2173
2174 /**
2175 * Chromaticity coordinates of the source primaries.
2176 * - encoding: Set by user
2177 * - decoding: Set by libavcodec
2178 */
2180
2181 /**
2182 * Color Transfer Characteristic.
2183 * - encoding: Set by user
2184 * - decoding: Set by libavcodec
2185 */
2187
2188 /**
2189 * YUV colorspace type.
2190 * - encoding: Set by user
2191 * - decoding: Set by libavcodec
2192 */
2194
2195 /**
2196 * MPEG vs JPEG YUV range.
2197 * - encoding: Set by user
2198 * - decoding: Set by libavcodec
2199 */
2201
2202 /**
2203 * This defines the location of chroma samples.
2204 * - encoding: Set by user
2205 * - decoding: Set by libavcodec
2206 */
2208
2209 /**
2210 * Number of slices.
2211 * Indicates number of picture subdivisions. Used for parallelized
2212 * decoding.
2213 * - encoding: Set by user
2214 * - decoding: unused
2215 */
2217
2218 /** Field order
2219 * - encoding: set by libavcodec
2220 * - decoding: Set by user.
2221 */
2223
2224 /* audio only */
2225 int sample_rate; ///< samples per second
2226 int channels; ///< number of audio channels
2227
2228 /**
2229 * audio sample format
2230 * - encoding: Set by user.
2231 * - decoding: Set by libavcodec.
2232 */
2233 enum AVSampleFormat sample_fmt; ///< sample format
2234
2235 /* The following data should not be initialized. */
2236 /**
2237 * Number of samples per channel in an audio frame.
2238 *
2239 * - encoding: set by libavcodec in avcodec_open2(). Each submitted frame
2240 * except the last must contain exactly frame_size samples per channel.
2241 * May be 0 when the codec has AV_CODEC_CAP_VARIABLE_FRAME_SIZE set, then the
2242 * frame size is not restricted.
2243 * - decoding: may be set by some decoders to indicate constant frame size
2244 */
2246
2247 /**
2248 * Frame counter, set by libavcodec.
2249 *
2250 * - decoding: total number of frames returned from the decoder so far.
2251 * - encoding: total number of frames passed to the encoder so far.
2252 *
2253 * @note the counter is not incremented if encoding/decoding resulted in
2254 * an error.
2255 */
2257
2258 /**
2259 * number of bytes per packet if constant and known or 0
2260 * Used by some WAV based audio codecs.
2261 */
2263
2264 /**
2265 * Audio cutoff bandwidth (0 means "automatic")
2266 * - encoding: Set by user.
2267 * - decoding: unused
2268 */
2270
2271 /**
2272 * Audio channel layout.
2273 * - encoding: set by user.
2274 * - decoding: set by user, may be overwritten by libavcodec.
2275 */
2277
2278 /**
2279 * Request decoder to use this channel layout if it can (0 for default)
2280 * - encoding: unused
2281 * - decoding: Set by user.
2282 */
2284
2285 /**
2286 * Type of service that the audio stream conveys.
2287 * - encoding: Set by user.
2288 * - decoding: Set by libavcodec.
2289 */
2291
2292 /**
2293 * desired sample format
2294 * - encoding: Not used.
2295 * - decoding: Set by user.
2296 * Decoder will decode to this format if it can.
2297 */
2299
2300 /**
2301 * This callback is called at the beginning of each frame to get data
2302 * buffer(s) for it. There may be one contiguous buffer for all the data or
2303 * there may be a buffer per each data plane or anything in between. What
2304 * this means is, you may set however many entries in buf[] you feel necessary.
2305 * Each buffer must be reference-counted using the AVBuffer API (see description
2306 * of buf[] below).
2307 *
2308 * The following fields will be set in the frame before this callback is
2309 * called:
2310 * - format
2311 * - width, height (video only)
2312 * - sample_rate, channel_layout, nb_samples (audio only)
2313 * Their values may differ from the corresponding values in
2314 * AVCodecContext. This callback must use the frame values, not the codec
2315 * context values, to calculate the required buffer size.
2316 *
2317 * This callback must fill the following fields in the frame:
2318 * - data[]
2319 * - linesize[]
2320 * - extended_data:
2321 * * if the data is planar audio with more than 8 channels, then this
2322 * callback must allocate and fill extended_data to contain all pointers
2323 * to all data planes. data[] must hold as many pointers as it can.
2324 * extended_data must be allocated with av_malloc() and will be freed in
2325 * av_frame_unref().
2326 * * otherwise extended_data must point to data
2327 * - buf[] must contain one or more pointers to AVBufferRef structures. Each of
2328 * the frame's data and extended_data pointers must be contained in these. That
2329 * is, one AVBufferRef for each allocated chunk of memory, not necessarily one
2330 * AVBufferRef per data[] entry. See: av_buffer_create(), av_buffer_alloc(),
2331 * and av_buffer_ref().
2332 * - extended_buf and nb_extended_buf must be allocated with av_malloc() by
2333 * this callback and filled with the extra buffers if there are more
2334 * buffers than buf[] can hold. extended_buf will be freed in
2335 * av_frame_unref().
2336 *
2337 * If AV_CODEC_CAP_DR1 is not set then get_buffer2() must call
2338 * avcodec_default_get_buffer2() instead of providing buffers allocated by
2339 * some other means.
2340 *
2341 * Each data plane must be aligned to the maximum required by the target
2342 * CPU.
2343 *
2344 * @see avcodec_default_get_buffer2()
2345 *
2346 * Video:
2347 *
2348 * If AV_GET_BUFFER_FLAG_REF is set in flags then the frame may be reused
2349 * (read and/or written to if it is writable) later by libavcodec.
2350 *
2351 * avcodec_align_dimensions2() should be used to find the required width and
2352 * height, as they normally need to be rounded up to the next multiple of 16.
2353 *
2354 * Some decoders do not support linesizes changing between frames.
2355 *
2356 * If frame multithreading is used and thread_safe_callbacks is set,
2357 * this callback may be called from a different thread, but not from more
2358 * than one at once. Does not need to be reentrant.
2359 *
2360 * @see avcodec_align_dimensions2()
2361 *
2362 * Audio:
2363 *
2364 * Decoders request a buffer of a particular size by setting
2365 * AVFrame.nb_samples prior to calling get_buffer2(). The decoder may,
2366 * however, utilize only part of the buffer by setting AVFrame.nb_samples
2367 * to a smaller value in the output frame.
2368 *
2369 * As a convenience, av_samples_get_buffer_size() and
2370 * av_samples_fill_arrays() in libavutil may be used by custom get_buffer2()
2371 * functions to find the required data size and to fill data pointers and
2372 * linesize. In AVFrame.linesize, only linesize[0] may be set for audio
2373 * since all planes must be the same size.
2374 *
2375 * @see av_samples_get_buffer_size(), av_samples_fill_arrays()
2376 *
2377 * - encoding: unused
2378 * - decoding: Set by libavcodec, user can override.
2379 */
2381
2382 /**
2383 * If non-zero, the decoded audio and video frames returned from
2384 * avcodec_decode_video2() and avcodec_decode_audio4() are reference-counted
2385 * and are valid indefinitely. The caller must free them with
2386 * av_frame_unref() when they are not needed anymore.
2387 * Otherwise, the decoded frames must not be freed by the caller and are
2388 * only valid until the next decode call.
2389 *
2390 * This is always automatically enabled if avcodec_receive_frame() is used.
2391 *
2392 * - encoding: unused
2393 * - decoding: set by the caller before avcodec_open2().
2394 */
2397
2398 /* - encoding parameters */
2399 float qcompress; ///< amount of qscale change between easy & hard scenes (0.0-1.0)
2400 float qblur; ///< amount of qscale smoothing over time (0.0-1.0)
2401
2402 /**
2403 * minimum quantizer
2404 * - encoding: Set by user.
2405 * - decoding: unused
2406 */
2407 int qmin;
2408
2409 /**
2410 * maximum quantizer
2411 * - encoding: Set by user.
2412 * - decoding: unused
2413 */
2414 int qmax;
2415
2416 /**
2417 * maximum quantizer difference between frames
2418 * - encoding: Set by user.
2419 * - decoding: unused
2420 */
2422
2423 /**
2424 * decoder bitstream buffer size
2425 * - encoding: Set by user.
2426 * - decoding: unused
2427 */
2429
2430 /**
2431 * ratecontrol override, see RcOverride
2432 * - encoding: Allocated/set/freed by user.
2433 * - decoding: unused
2434 */
2437
2438 /**
2439 * maximum bitrate
2440 * - encoding: Set by user.
2441 * - decoding: Set by user, may be overwritten by libavcodec.
2442 */
2444
2445 /**
2446 * minimum bitrate
2447 * - encoding: Set by user.
2448 * - decoding: unused
2449 */
2451
2452 /**
2453 * Ratecontrol attempt to use, at maximum, <value> of what can be used without an underflow.
2454 * - encoding: Set by user.
2455 * - decoding: unused.
2456 */
2458
2459 /**
2460 * Ratecontrol attempt to use, at least, <value> times the amount needed to prevent a vbv overflow.
2461 * - encoding: Set by user.
2462 * - decoding: unused.
2463 */
2465
2466 /**
2467 * Number of bits which should be loaded into the rc buffer before decoding starts.
2468 * - encoding: Set by user.
2469 * - decoding: unused
2470 */
2472
2473#if FF_API_CODER_TYPE
2474#define FF_CODER_TYPE_VLC 0
2475#define FF_CODER_TYPE_AC 1
2476#define FF_CODER_TYPE_RAW 2
2477#define FF_CODER_TYPE_RLE 3
2478 /**
2479 * @deprecated use encoder private options instead
2480 */
2483#endif /* FF_API_CODER_TYPE */
2484
2485#if FF_API_PRIVATE_OPT
2486 /** @deprecated use encoder private options instead */
2489#endif
2490
2491#if FF_API_PRIVATE_OPT
2492 /** @deprecated use encoder private options instead */
2495
2496 /** @deprecated use encoder private options instead */
2499
2500 /** @deprecated use encoder private options instead */
2503
2504 /** @deprecated use encoder private options instead */
2507#endif /* FF_API_PRIVATE_OPT */
2508
2509 /**
2510 * trellis RD quantization
2511 * - encoding: Set by user.
2512 * - decoding: unused
2513 */
2515
2516#if FF_API_PRIVATE_OPT
2517 /** @deprecated use encoder private options instead */
2520
2521 /** @deprecated use encoder private options instead */
2524
2525 /** @deprecated use encoder private options instead */
2528#endif
2529
2530#if FF_API_RTP_CALLBACK
2531 /**
2532 * @deprecated unused
2533 */
2534 /* The RTP callback: This function is called */
2535 /* every time the encoder has a packet to send. */
2536 /* It depends on the encoder if the data starts */
2537 /* with a Start Code (it should). H.263 does. */
2538 /* mb_nb contains the number of macroblocks */
2539 /* encoded in the RTP payload. */
2541 void (*rtp_callback)(struct AVCodecContext *avctx, void *data, int size, int mb_nb);
2542#endif
2543
2544#if FF_API_PRIVATE_OPT
2545 /** @deprecated use encoder private options instead */
2547 int rtp_payload_size; /* The size of the RTP payload: the coder will */
2548 /* do its best to deliver a chunk with size */
2549 /* below rtp_payload_size, the chunk will start */
2550 /* with a start code on some codecs like H.263. */
2551 /* This doesn't take account of any particular */
2552 /* headers inside the transmitted RTP payload. */
2553#endif
2554
2555#if FF_API_STAT_BITS
2556 /* statistics, used for 2-pass encoding */
2573
2574 /** @deprecated this field is unused */
2577#endif
2578
2579 /**
2580 * pass1 encoding statistics output buffer
2581 * - encoding: Set by libavcodec.
2582 * - decoding: unused
2583 */
2585
2586 /**
2587 * pass2 encoding statistics input buffer
2588 * Concatenated stuff from stats_out of pass1 should be placed here.
2589 * - encoding: Allocated/set/freed by user.
2590 * - decoding: unused
2591 */
2593
2594 /**
2595 * Work around bugs in encoders which sometimes cannot be detected automatically.
2596 * - encoding: Set by user
2597 * - decoding: Set by user
2598 */
2600#define FF_BUG_AUTODETECT 1 ///< autodetection
2601#define FF_BUG_XVID_ILACE 4
2602#define FF_BUG_UMP4 8
2603#define FF_BUG_NO_PADDING 16
2604#define FF_BUG_AMV 32
2605#define FF_BUG_QPEL_CHROMA 64
2606#define FF_BUG_STD_QPEL 128
2607#define FF_BUG_QPEL_CHROMA2 256
2608#define FF_BUG_DIRECT_BLOCKSIZE 512
2609#define FF_BUG_EDGE 1024
2610#define FF_BUG_HPEL_CHROMA 2048
2611#define FF_BUG_DC_CLIP 4096
2612#define FF_BUG_MS 8192 ///< Work around various bugs in Microsoft's broken decoders.
2613#define FF_BUG_TRUNCATED 16384
2614#define FF_BUG_IEDGE 32768
2615
2616 /**
2617 * strictly follow the standard (MPEG-4, ...).
2618 * - encoding: Set by user.
2619 * - decoding: Set by user.
2620 * Setting this to STRICT or higher means the encoder and decoder will
2621 * generally do stupid things, whereas setting it to unofficial or lower
2622 * will mean the encoder might produce output that is not supported by all
2623 * spec-compliant decoders. Decoders don't differentiate between normal,
2624 * unofficial and experimental (that is, they always try to decode things
2625 * when they can) unless they are explicitly asked to behave stupidly
2626 * (=strictly conform to the specs)
2627 */
2629#define FF_COMPLIANCE_VERY_STRICT 2 ///< Strictly conform to an older more strict version of the spec or reference software.
2630#define FF_COMPLIANCE_STRICT 1 ///< Strictly conform to all the things in the spec no matter what consequences.
2631#define FF_COMPLIANCE_NORMAL 0
2632#define FF_COMPLIANCE_UNOFFICIAL -1 ///< Allow unofficial extensions
2633#define FF_COMPLIANCE_EXPERIMENTAL -2 ///< Allow nonstandardized experimental things.
2634
2635 /**
2636 * error concealment flags
2637 * - encoding: unused
2638 * - decoding: Set by user.
2639 */
2641#define FF_EC_GUESS_MVS 1
2642#define FF_EC_DEBLOCK 2
2643#define FF_EC_FAVOR_INTER 256
2644
2645 /**
2646 * debug
2647 * - encoding: Set by user.
2648 * - decoding: Set by user.
2649 */
2651#define FF_DEBUG_PICT_INFO 1
2652#define FF_DEBUG_RC 2
2653#define FF_DEBUG_BITSTREAM 4
2654#define FF_DEBUG_MB_TYPE 8
2655#define FF_DEBUG_QP 16
2656#if FF_API_DEBUG_MV
2657/**
2658 * @deprecated this option does nothing
2659 */
2660#define FF_DEBUG_MV 32
2661#endif
2662#define FF_DEBUG_DCT_COEFF 0x00000040
2663#define FF_DEBUG_SKIP 0x00000080
2664#define FF_DEBUG_STARTCODE 0x00000100
2665#define FF_DEBUG_ER 0x00000400
2666#define FF_DEBUG_MMCO 0x00000800
2667#define FF_DEBUG_BUGS 0x00001000
2668#if FF_API_DEBUG_MV
2669#define FF_DEBUG_VIS_QP 0x00002000
2670#define FF_DEBUG_VIS_MB_TYPE 0x00004000
2671#endif
2672#define FF_DEBUG_BUFFERS 0x00008000
2673#define FF_DEBUG_THREADS 0x00010000
2674#define FF_DEBUG_GREEN_MD 0x00800000
2675#define FF_DEBUG_NOMC 0x01000000
2676
2677#if FF_API_DEBUG_MV
2678 /**
2679 * debug
2680 * - encoding: Set by user.
2681 * - decoding: Set by user.
2682 */
2683 int debug_mv;
2684#define FF_DEBUG_VIS_MV_P_FOR 0x00000001 // visualize forward predicted MVs of P-frames
2685#define FF_DEBUG_VIS_MV_B_FOR 0x00000002 // visualize forward predicted MVs of B-frames
2686#define FF_DEBUG_VIS_MV_B_BACK 0x00000004 // visualize backward predicted MVs of B-frames
2687#endif
2688
2689 /**
2690 * Error recognition; may misdetect some more or less valid parts as errors.
2691 * - encoding: unused
2692 * - decoding: Set by user.
2693 */
2695
2696/**
2697 * Verify checksums embedded in the bitstream (could be of either encoded or
2698 * decoded data, depending on the codec) and print an error message on mismatch.
2699 * If AV_EF_EXPLODE is also set, a mismatching checksum will result in the
2700 * decoder returning an error.
2701 */
2702#define AV_EF_CRCCHECK (1<<0)
2703#define AV_EF_BITSTREAM (1<<1) ///< detect bitstream specification deviations
2704#define AV_EF_BUFFER (1<<2) ///< detect improper bitstream length
2705#define AV_EF_EXPLODE (1<<3) ///< abort decoding on minor error detection
2706
2707#define AV_EF_IGNORE_ERR (1<<15) ///< ignore errors and continue
2708#define AV_EF_CAREFUL (1<<16) ///< consider things that violate the spec, are fast to calculate and have not been seen in the wild as errors
2709#define AV_EF_COMPLIANT (1<<17) ///< consider all spec non compliances as errors
2710#define AV_EF_AGGRESSIVE (1<<18) ///< consider things that a sane encoder should not do as an error
2711
2712
2713 /**
2714 * opaque 64-bit number (generally a PTS) that will be reordered and
2715 * output in AVFrame.reordered_opaque
2716 * - encoding: Set by libavcodec to the reordered_opaque of the input
2717 * frame corresponding to the last returned packet. Only
2718 * supported by encoders with the
2719 * AV_CODEC_CAP_ENCODER_REORDERED_OPAQUE capability.
2720 * - decoding: Set by user.
2721 */
2723
2724 /**
2725 * Hardware accelerator in use
2726 * - encoding: unused.
2727 * - decoding: Set by libavcodec
2728 */
2729 const struct AVHWAccel *hwaccel;
2730
2731 /**
2732 * Hardware accelerator context.
2733 * For some hardware accelerators, a global context needs to be
2734 * provided by the user. In that case, this holds display-dependent
2735 * data FFmpeg cannot instantiate itself. Please refer to the
2736 * FFmpeg HW accelerator documentation to know how to fill this
2737 * is. e.g. for VA API, this is a struct vaapi_context.
2738 * - encoding: unused
2739 * - decoding: Set by user
2740 */
2742
2743 /**
2744 * error
2745 * - encoding: Set by libavcodec if flags & AV_CODEC_FLAG_PSNR.
2746 * - decoding: unused
2747 */
2749
2750 /**
2751 * DCT algorithm, see FF_DCT_* below
2752 * - encoding: Set by user.
2753 * - decoding: unused
2754 */
2756#define FF_DCT_AUTO 0
2757#define FF_DCT_FASTINT 1
2758#define FF_DCT_INT 2
2759#define FF_DCT_MMX 3
2760#define FF_DCT_ALTIVEC 5
2761#define FF_DCT_FAAN 6
2762
2763 /**
2764 * IDCT algorithm, see FF_IDCT_* below.
2765 * - encoding: Set by user.
2766 * - decoding: Set by user.
2767 */
2769#define FF_IDCT_AUTO 0
2770#define FF_IDCT_INT 1
2771#define FF_IDCT_SIMPLE 2
2772#define FF_IDCT_SIMPLEMMX 3
2773#define FF_IDCT_ARM 7
2774#define FF_IDCT_ALTIVEC 8
2775#define FF_IDCT_SIMPLEARM 10
2776#define FF_IDCT_XVID 14
2777#define FF_IDCT_SIMPLEARMV5TE 16
2778#define FF_IDCT_SIMPLEARMV6 17
2779#define FF_IDCT_FAAN 20
2780#define FF_IDCT_SIMPLENEON 22
2781#define FF_IDCT_NONE 24 /* Used by XvMC to extract IDCT coefficients with FF_IDCT_PERM_NONE */
2782#define FF_IDCT_SIMPLEAUTO 128
2783
2784 /**
2785 * bits per sample/pixel from the demuxer (needed for huffyuv).
2786 * - encoding: Set by libavcodec.
2787 * - decoding: Set by user.
2788 */
2790
2791 /**
2792 * Bits per sample/pixel of internal libavcodec pixel/sample format.
2793 * - encoding: set by user.
2794 * - decoding: set by libavcodec.
2795 */
2797
2798#if FF_API_LOWRES
2799 /**
2800 * low resolution decoding, 1-> 1/2 size, 2->1/4 size
2801 * - encoding: unused
2802 * - decoding: Set by user.
2803 */
2805#endif
2806
2807#if FF_API_CODED_FRAME
2808 /**
2809 * the picture in the bitstream
2810 * - encoding: Set by libavcodec.
2811 * - decoding: unused
2812 *
2813 * @deprecated use the quality factor packet side data instead
2814 */
2816#endif
2817
2818 /**
2819 * thread count
2820 * is used to decide how many independent tasks should be passed to execute()
2821 * - encoding: Set by user.
2822 * - decoding: Set by user.
2823 */
2825
2826 /**
2827 * Which multithreading methods to use.
2828 * Use of FF_THREAD_FRAME will increase decoding delay by one frame per thread,
2829 * so clients which cannot provide future frames should not use it.
2830 *
2831 * - encoding: Set by user, otherwise the default is used.
2832 * - decoding: Set by user, otherwise the default is used.
2833 */
2835#define FF_THREAD_FRAME 1 ///< Decode more than one frame at once
2836#define FF_THREAD_SLICE 2 ///< Decode more than one part of a single frame at once
2837
2838 /**
2839 * Which multithreading methods are in use by the codec.
2840 * - encoding: Set by libavcodec.
2841 * - decoding: Set by libavcodec.
2842 */
2844
2845 /**
2846 * Set by the client if its custom get_buffer() callback can be called
2847 * synchronously from another thread, which allows faster multithreaded decoding.
2848 * draw_horiz_band() will be called from other threads regardless of this setting.
2849 * Ignored if the default get_buffer() is used.
2850 * - encoding: Set by user.
2851 * - decoding: Set by user.
2852 */
2854
2855 /**
2856 * The codec may call this to execute several independent things.
2857 * It will return only after finishing all tasks.
2858 * The user may replace this with some multithreaded implementation,
2859 * the default implementation will execute the parts serially.
2860 * @param count the number of things to execute
2861 * - encoding: Set by libavcodec, user can override.
2862 * - decoding: Set by libavcodec, user can override.
2863 */
2864 int (*execute)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg), void *arg2, int *ret, int count, int size);
2865
2866 /**
2867 * The codec may call this to execute several independent things.
2868 * It will return only after finishing all tasks.
2869 * The user may replace this with some multithreaded implementation,
2870 * the default implementation will execute the parts serially.
2871 * Also see avcodec_thread_init and e.g. the --enable-pthread configure option.
2872 * @param c context passed also to func
2873 * @param count the number of things to execute
2874 * @param arg2 argument passed unchanged to func
2875 * @param ret return values of executed functions, must have space for "count" values. May be NULL.
2876 * @param func function that will be called count times, with jobnr from 0 to count-1.
2877 * threadnr will be in the range 0 to c->thread_count-1 < MAX_THREADS and so that no
2878 * two instances of func executing at the same time will have the same threadnr.
2879 * @return always 0 currently, but code should handle a future improvement where when any call to func
2880 * returns < 0 no further calls to func may be done and < 0 is returned.
2881 * - encoding: Set by libavcodec, user can override.
2882 * - decoding: Set by libavcodec, user can override.
2883 */
2884 int (*execute2)(struct AVCodecContext *c, int (*func)(struct AVCodecContext *c2, void *arg, int jobnr, int threadnr), void *arg2, int *ret, int count);
2885
2886 /**
2887 * noise vs. sse weight for the nsse comparison function
2888 * - encoding: Set by user.
2889 * - decoding: unused
2890 */
2892
2893 /**
2894 * profile
2895 * - encoding: Set by user.
2896 * - decoding: Set by libavcodec.
2897 */
2899#define FF_PROFILE_UNKNOWN -99
2900#define FF_PROFILE_RESERVED -100
2901
2902#define FF_PROFILE_AAC_MAIN 0
2903#define FF_PROFILE_AAC_LOW 1
2904#define FF_PROFILE_AAC_SSR 2
2905#define FF_PROFILE_AAC_LTP 3
2906#define FF_PROFILE_AAC_HE 4
2907#define FF_PROFILE_AAC_HE_V2 28
2908#define FF_PROFILE_AAC_LD 22
2909#define FF_PROFILE_AAC_ELD 38
2910#define FF_PROFILE_MPEG2_AAC_LOW 128
2911#define FF_PROFILE_MPEG2_AAC_HE 131
2912
2913#define FF_PROFILE_DNXHD 0
2914#define FF_PROFILE_DNXHR_LB 1
2915#define FF_PROFILE_DNXHR_SQ 2
2916#define FF_PROFILE_DNXHR_HQ 3
2917#define FF_PROFILE_DNXHR_HQX 4
2918#define FF_PROFILE_DNXHR_444 5
2919
2920#define FF_PROFILE_DTS 20
2921#define FF_PROFILE_DTS_ES 30
2922#define FF_PROFILE_DTS_96_24 40
2923#define FF_PROFILE_DTS_HD_HRA 50
2924#define FF_PROFILE_DTS_HD_MA 60
2925#define FF_PROFILE_DTS_EXPRESS 70
2926
2927#define FF_PROFILE_MPEG2_422 0
2928#define FF_PROFILE_MPEG2_HIGH 1
2929#define FF_PROFILE_MPEG2_SS 2
2930#define FF_PROFILE_MPEG2_SNR_SCALABLE 3
2931#define FF_PROFILE_MPEG2_MAIN 4
2932#define FF_PROFILE_MPEG2_SIMPLE 5
2933
2934#define FF_PROFILE_H264_CONSTRAINED (1<<9) // 8+1; constraint_set1_flag
2935#define FF_PROFILE_H264_INTRA (1<<11) // 8+3; constraint_set3_flag
2936
2937#define FF_PROFILE_H264_BASELINE 66
2938#define FF_PROFILE_H264_CONSTRAINED_BASELINE (66|FF_PROFILE_H264_CONSTRAINED)
2939#define FF_PROFILE_H264_MAIN 77
2940#define FF_PROFILE_H264_EXTENDED 88
2941#define FF_PROFILE_H264_HIGH 100
2942#define FF_PROFILE_H264_HIGH_10 110
2943#define FF_PROFILE_H264_HIGH_10_INTRA (110|FF_PROFILE_H264_INTRA)
2944#define FF_PROFILE_H264_MULTIVIEW_HIGH 118
2945#define FF_PROFILE_H264_HIGH_422 122
2946#define FF_PROFILE_H264_HIGH_422_INTRA (122|FF_PROFILE_H264_INTRA)
2947#define FF_PROFILE_H264_STEREO_HIGH 128
2948#define FF_PROFILE_H264_HIGH_444 144
2949#define FF_PROFILE_H264_HIGH_444_PREDICTIVE 244
2950#define FF_PROFILE_H264_HIGH_444_INTRA (244|FF_PROFILE_H264_INTRA)
2951#define FF_PROFILE_H264_CAVLC_444 44
2952
2953#define FF_PROFILE_VC1_SIMPLE 0
2954#define FF_PROFILE_VC1_MAIN 1
2955#define FF_PROFILE_VC1_COMPLEX 2
2956#define FF_PROFILE_VC1_ADVANCED 3
2957
2958#define FF_PROFILE_MPEG4_SIMPLE 0
2959#define FF_PROFILE_MPEG4_SIMPLE_SCALABLE 1
2960#define FF_PROFILE_MPEG4_CORE 2
2961#define FF_PROFILE_MPEG4_MAIN 3
2962#define FF_PROFILE_MPEG4_N_BIT 4
2963#define FF_PROFILE_MPEG4_SCALABLE_TEXTURE 5
2964#define FF_PROFILE_MPEG4_SIMPLE_FACE_ANIMATION 6
2965#define FF_PROFILE_MPEG4_BASIC_ANIMATED_TEXTURE 7
2966#define FF_PROFILE_MPEG4_HYBRID 8
2967#define FF_PROFILE_MPEG4_ADVANCED_REAL_TIME 9
2968#define FF_PROFILE_MPEG4_CORE_SCALABLE 10
2969#define FF_PROFILE_MPEG4_ADVANCED_CODING 11
2970#define FF_PROFILE_MPEG4_ADVANCED_CORE 12
2971#define FF_PROFILE_MPEG4_ADVANCED_SCALABLE_TEXTURE 13
2972#define FF_PROFILE_MPEG4_SIMPLE_STUDIO 14
2973#define FF_PROFILE_MPEG4_ADVANCED_SIMPLE 15
2974
2975#define FF_PROFILE_JPEG2000_CSTREAM_RESTRICTION_0 1
2976#define FF_PROFILE_JPEG2000_CSTREAM_RESTRICTION_1 2
2977#define FF_PROFILE_JPEG2000_CSTREAM_NO_RESTRICTION 32768
2978#define FF_PROFILE_JPEG2000_DCINEMA_2K 3
2979#define FF_PROFILE_JPEG2000_DCINEMA_4K 4
2980
2981#define FF_PROFILE_VP9_0 0
2982#define FF_PROFILE_VP9_1 1
2983#define FF_PROFILE_VP9_2 2
2984#define FF_PROFILE_VP9_3 3
2985
2986#define FF_PROFILE_HEVC_MAIN 1
2987#define FF_PROFILE_HEVC_MAIN_10 2
2988#define FF_PROFILE_HEVC_MAIN_STILL_PICTURE 3
2989#define FF_PROFILE_HEVC_REXT 4
2990
2991#define FF_PROFILE_AV1_MAIN 0
2992#define FF_PROFILE_AV1_HIGH 1
2993#define FF_PROFILE_AV1_PROFESSIONAL 2
2994
2995#define FF_PROFILE_MJPEG_HUFFMAN_BASELINE_DCT 0xc0
2996#define FF_PROFILE_MJPEG_HUFFMAN_EXTENDED_SEQUENTIAL_DCT 0xc1
2997#define FF_PROFILE_MJPEG_HUFFMAN_PROGRESSIVE_DCT 0xc2
2998#define FF_PROFILE_MJPEG_HUFFMAN_LOSSLESS 0xc3
2999#define FF_PROFILE_MJPEG_JPEG_LS 0xf7
3000
3001#define FF_PROFILE_SBC_MSBC 1
3002
3003#define FF_PROFILE_PRORES_PROXY 0
3004#define FF_PROFILE_PRORES_LT 1
3005#define FF_PROFILE_PRORES_STANDARD 2
3006#define FF_PROFILE_PRORES_HQ 3
3007#define FF_PROFILE_PRORES_4444 4
3008#define FF_PROFILE_PRORES_XQ 5
3009
3010#define FF_PROFILE_ARIB_PROFILE_A 0
3011#define FF_PROFILE_ARIB_PROFILE_C 1
3012
3013 /**
3014 * level
3015 * - encoding: Set by user.
3016 * - decoding: Set by libavcodec.
3017 */
3019#define FF_LEVEL_UNKNOWN -99
3020
3021 /**
3022 * Skip loop filtering for selected frames.
3023 * - encoding: unused
3024 * - decoding: Set by user.
3025 */
3027
3028 /**
3029 * Skip IDCT/dequantization for selected frames.
3030 * - encoding: unused
3031 * - decoding: Set by user.
3032 */
3034
3035 /**
3036 * Skip decoding for selected frames.
3037 * - encoding: unused
3038 * - decoding: Set by user.
3039 */
3041
3042 /**
3043 * Header containing style information for text subtitles.
3044 * For SUBTITLE_ASS subtitle type, it should contain the whole ASS
3045 * [Script Info] and [V4+ Styles] section, plus the [Events] line and
3046 * the Format line following. It shouldn't include any Dialogue line.
3047 * - encoding: Set/allocated/freed by user (before avcodec_open2())
3048 * - decoding: Set/allocated/freed by libavcodec (by avcodec_open2())
3049 */
3052
3053#if FF_API_VBV_DELAY
3054 /**
3055 * VBV delay coded in the last frame (in periods of a 27 MHz clock).
3056 * Used for compliant TS muxing.
3057 * - encoding: Set by libavcodec.
3058 * - decoding: unused.
3059 * @deprecated this value is now exported as a part of
3060 * AV_PKT_DATA_CPB_PROPERTIES packet side data
3061 */
3063 uint64_t vbv_delay;
3064#endif
3065
3066#if FF_API_SIDEDATA_ONLY_PKT
3067 /**
3068 * Encoding only and set by default. Allow encoders to output packets
3069 * that do not contain any encoded data, only side data.
3070 *
3071 * Some encoders need to output such packets, e.g. to update some stream
3072 * parameters at the end of encoding.
3073 *
3074 * @deprecated this field disables the default behaviour and
3075 * it is kept only for compatibility.
3076 */
3079#endif
3080
3081 /**
3082 * Audio only. The number of "priming" samples (padding) inserted by the
3083 * encoder at the beginning of the audio. I.e. this number of leading
3084 * decoded samples must be discarded by the caller to get the original audio
3085 * without leading padding.
3086 *
3087 * - decoding: unused
3088 * - encoding: Set by libavcodec. The timestamps on the output packets are
3089 * adjusted by the encoder so that they always refer to the
3090 * first sample of the data actually contained in the packet,
3091 * including any added padding. E.g. if the timebase is
3092 * 1/samplerate and the timestamp of the first input sample is
3093 * 0, the timestamp of the first output packet will be
3094 * -initial_padding.
3095 */
3097
3098 /**
3099 * - decoding: For codecs that store a framerate value in the compressed
3100 * bitstream, the decoder may export it here. { 0, 1} when
3101 * unknown.
3102 * - encoding: May be used to signal the framerate of CFR content to an
3103 * encoder.
3104 */
3106
3107 /**
3108 * Nominal unaccelerated pixel format, see AV_PIX_FMT_xxx.
3109 * - encoding: unused.
3110 * - decoding: Set by libavcodec before calling get_format()
3111 */
3113
3114 /**
3115 * Timebase in which pkt_dts/pts and AVPacket.dts/pts are.
3116 * - encoding unused.
3117 * - decoding set by user.
3118 */
3120
3121 /**
3122 * AVCodecDescriptor
3123 * - encoding: unused.
3124 * - decoding: set by libavcodec.
3125 */
3127
3128#if !FF_API_LOWRES
3129 /**
3130 * low resolution decoding, 1-> 1/2 size, 2->1/4 size
3131 * - encoding: unused
3132 * - decoding: Set by user.
3133 */
3134 int lowres;
3135#endif
3136
3137 /**
3138 * Current statistics for PTS correction.
3139 * - decoding: maintained and used by libavcodec, not intended to be used by user apps
3140 * - encoding: unused
3141 */
3142 int64_t pts_correction_num_faulty_pts; /// Number of incorrect PTS values so far
3143 int64_t pts_correction_num_faulty_dts; /// Number of incorrect DTS values so far
3144 int64_t pts_correction_last_pts; /// PTS of the last frame
3145 int64_t pts_correction_last_dts; /// DTS of the last frame
3146
3147 /**
3148 * Character encoding of the input subtitles file.
3149 * - decoding: set by user
3150 * - encoding: unused
3151 */
3153
3154 /**
3155 * Subtitles character encoding mode. Formats or codecs might be adjusting
3156 * this setting (if they are doing the conversion themselves for instance).
3157 * - decoding: set by libavcodec
3158 * - encoding: unused
3159 */
3161#define FF_SUB_CHARENC_MODE_DO_NOTHING -1 ///< do nothing (demuxer outputs a stream supposed to be already in UTF-8, or the codec is bitmap for instance)
3162#define FF_SUB_CHARENC_MODE_AUTOMATIC 0 ///< libavcodec will select the mode itself
3163#define FF_SUB_CHARENC_MODE_PRE_DECODER 1 ///< the AVPacket data needs to be recoded to UTF-8 before being fed to the decoder, requires iconv
3164#define FF_SUB_CHARENC_MODE_IGNORE 2 ///< neither convert the subtitles, nor check them for valid UTF-8
3165
3166 /**
3167 * Skip processing alpha if supported by codec.
3168 * Note that if the format uses pre-multiplied alpha (common with VP6,
3169 * and recommended due to better video quality/compression)
3170 * the image will look as if alpha-blended onto a black background.
3171 * However for formats that do not use pre-multiplied alpha
3172 * there might be serious artefacts (though e.g. libswscale currently
3173 * assumes pre-multiplied alpha anyway).
3174 *
3175 * - decoding: set by user
3176 * - encoding: unused
3177 */
3179
3180 /**
3181 * Number of samples to skip after a discontinuity
3182 * - decoding: unused
3183 * - encoding: set by libavcodec
3184 */
3186
3187#if !FF_API_DEBUG_MV
3188 /**
3189 * debug motion vectors
3190 * - encoding: Set by user.
3191 * - decoding: Set by user.
3192 */
3194#define FF_DEBUG_VIS_MV_P_FOR 0x00000001 //visualize forward predicted MVs of P frames
3195#define FF_DEBUG_VIS_MV_B_FOR 0x00000002 //visualize forward predicted MVs of B frames
3196#define FF_DEBUG_VIS_MV_B_BACK 0x00000004 //visualize backward predicted MVs of B frames
3197#endif
3198
3199 /**
3200 * custom intra quantization matrix
3201 * - encoding: Set by user, can be NULL.
3202 * - decoding: unused.
3203 */
3205
3206 /**
3207 * dump format separator.
3208 * can be ", " or "\n " or anything else
3209 * - encoding: Set by user.
3210 * - decoding: Set by user.
3211 */
3213
3214 /**
3215 * ',' separated list of allowed decoders.
3216 * If NULL then all are allowed
3217 * - encoding: unused
3218 * - decoding: set by user
3219 */
3221
3222 /**
3223 * Properties of the stream that gets decoded
3224 * - encoding: unused
3225 * - decoding: set by libavcodec
3226 */
3227 unsigned properties;
3228#define FF_CODEC_PROPERTY_LOSSLESS 0x00000001
3229#define FF_CODEC_PROPERTY_CLOSED_CAPTIONS 0x00000002
3230
3231 /**
3232 * Additional data associated with the entire coded stream.
3233 *
3234 * - decoding: unused
3235 * - encoding: may be set by libavcodec after avcodec_open2().
3236 */
3239
3240 /**
3241 * A reference to the AVHWFramesContext describing the input (for encoding)
3242 * or output (decoding) frames. The reference is set by the caller and
3243 * afterwards owned (and freed) by libavcodec - it should never be read by
3244 * the caller after being set.
3245 *
3246 * - decoding: This field should be set by the caller from the get_format()
3247 * callback. The previous reference (if any) will always be
3248 * unreffed by libavcodec before the get_format() call.
3249 *
3250 * If the default get_buffer2() is used with a hwaccel pixel
3251 * format, then this AVHWFramesContext will be used for
3252 * allocating the frame buffers.
3253 *
3254 * - encoding: For hardware encoders configured to use a hwaccel pixel
3255 * format, this field should be set by the caller to a reference
3256 * to the AVHWFramesContext describing input frames.
3257 * AVHWFramesContext.format must be equal to
3258 * AVCodecContext.pix_fmt.
3259 *
3260 * This field should be set before avcodec_open2() is called.
3261 */
3263
3264 /**
3265 * Control the form of AVSubtitle.rects[N]->ass
3266 * - decoding: set by user
3267 * - encoding: unused
3268 */
3270#define FF_SUB_TEXT_FMT_ASS 0
3271#if FF_API_ASS_TIMING
3272#define FF_SUB_TEXT_FMT_ASS_WITH_TIMINGS 1
3273#endif
3274
3275 /**
3276 * Audio only. The amount of padding (in samples) appended by the encoder to
3277 * the end of the audio. I.e. this number of decoded samples must be
3278 * discarded by the caller from the end of the stream to get the original
3279 * audio without any trailing padding.
3280 *
3281 * - decoding: unused
3282 * - encoding: unused
3283 */
3285
3286 /**
3287 * The number of pixels per image to maximally accept.
3288 *
3289 * - decoding: set by user
3290 * - encoding: set by user
3291 */
3292 int64_t max_pixels;
3293
3294 /**
3295 * A reference to the AVHWDeviceContext describing the device which will
3296 * be used by a hardware encoder/decoder. The reference is set by the
3297 * caller and afterwards owned (and freed) by libavcodec.
3298 *
3299 * This should be used if either the codec device does not require
3300 * hardware frames or any that are used are to be allocated internally by
3301 * libavcodec. If the user wishes to supply any of the frames used as
3302 * encoder input or decoder output then hw_frames_ctx should be used
3303 * instead. When hw_frames_ctx is set in get_format() for a decoder, this
3304 * field will be ignored while decoding the associated stream segment, but
3305 * may again be used on a following one after another get_format() call.
3306 *
3307 * For both encoders and decoders this field should be set before
3308 * avcodec_open2() is called and must not be written to thereafter.
3309 *
3310 * Note that some decoders may require this field to be set initially in
3311 * order to support hw_frames_ctx at all - in that case, all frames
3312 * contexts used must be created on the same device.
3313 */
3315
3316 /**
3317 * Bit set of AV_HWACCEL_FLAG_* flags, which affect hardware accelerated
3318 * decoding (if active).
3319 * - encoding: unused
3320 * - decoding: Set by user (either before avcodec_open2(), or in the
3321 * AVCodecContext.get_format callback)
3322 */
3324
3325 /**
3326 * Video decoding only. Certain video codecs support cropping, meaning that
3327 * only a sub-rectangle of the decoded frame is intended for display. This
3328 * option controls how cropping is handled by libavcodec.
3329 *
3330 * When set to 1 (the default), libavcodec will apply cropping internally.
3331 * I.e. it will modify the output frame width/height fields and offset the
3332 * data pointers (only by as much as possible while preserving alignment, or
3333 * by the full amount if the AV_CODEC_FLAG_UNALIGNED flag is set) so that
3334 * the frames output by the decoder refer only to the cropped area. The
3335 * crop_* fields of the output frames will be zero.
3336 *
3337 * When set to 0, the width/height fields of the output frames will be set
3338 * to the coded dimensions and the crop_* fields will describe the cropping
3339 * rectangle. Applying the cropping is left to the caller.
3340 *
3341 * @warning When hardware acceleration with opaque output frames is used,
3342 * libavcodec is unable to apply cropping from the top/left border.
3343 *
3344 * @note when this option is set to zero, the width/height fields of the
3345 * AVCodecContext and output AVFrames have different meanings. The codec
3346 * context fields store display dimensions (with the coded dimensions in
3347 * coded_width/height), while the frame fields store the coded dimensions
3348 * (with the display dimensions being determined by the crop_* fields).
3349 */
3351
3352 /*
3353 * Video decoding only. Sets the number of extra hardware frames which
3354 * the decoder will allocate for use by the caller. This must be set
3355 * before avcodec_open2() is called.
3356 *
3357 * Some hardware decoders require all frames that they will use for
3358 * output to be defined in advance before decoding starts. For such
3359 * decoders, the hardware frame pool must therefore be of a fixed size.
3360 * The extra frames set here are on top of any number that the decoder
3361 * needs internally in order to operate normally (for example, frames
3362 * used as reference pictures).
3363 */
3365
3366 /**
3367 * The percentage of damaged samples to discard a frame.
3368 *
3369 * - decoding: set by user
3370 * - encoding: unused
3371 */
3374
3375#if FF_API_CODEC_GET_SET
3376/**
3377 * Accessors for some AVCodecContext fields. These used to be provided for ABI
3378 * compatibility, and do not need to be used anymore.
3379 */
3384
3389
3392
3393#if FF_API_LOWRES
3398#endif
3399
3404
3409#endif
3410
3411/**
3412 * AVProfile.
3413 */
3414typedef struct AVProfile {
3416 const char *name; ///< short name for the profile
3417} AVProfile;
3418
3419enum {
3420 /**
3421 * The codec supports this format via the hw_device_ctx interface.
3422 *
3423 * When selecting this format, AVCodecContext.hw_device_ctx should
3424 * have been set to a device of the specified type before calling
3425 * avcodec_open2().
3426 */
3428 /**
3429 * The codec supports this format via the hw_frames_ctx interface.
3430 *
3431 * When selecting this format for a decoder,
3432 * AVCodecContext.hw_frames_ctx should be set to a suitable frames
3433 * context inside the get_format() callback. The frames context
3434 * must have been created on a device of the specified type.
3435 */
3437 /**
3438 * The codec supports this format by some internal method.
3439 *
3440 * This format can be selected without any additional configuration -
3441 * no device or frames context is required.
3442 */
3444 /**
3445 * The codec supports this format by some ad-hoc method.
3446 *
3447 * Additional settings and/or function calls are required. See the
3448 * codec-specific documentation for details. (Methods requiring
3449 * this sort of configuration are deprecated and others should be
3450 * used in preference.)
3451 */
3453};
3454
3455typedef struct AVCodecHWConfig {
3456 /**
3457 * A hardware pixel format which the codec can use.
3458 */
3460 /**
3461 * Bit set of AV_CODEC_HW_CONFIG_METHOD_* flags, describing the possible
3462 * setup methods which can be used with this configuration.
3463 */
3465 /**
3466 * The device type associated with the configuration.
3467 *
3468 * Must be set for AV_CODEC_HW_CONFIG_METHOD_HW_DEVICE_CTX and
3469 * AV_CODEC_HW_CONFIG_METHOD_HW_FRAMES_CTX, otherwise unused.
3470 */
3473
3475
3476struct AVSubtitle;
3477
3478/**
3479 * AVCodec.
3480 */
3481typedef struct AVCodec {
3482 /**
3483 * Name of the codec implementation.
3484 * The name is globally unique among encoders and among decoders (but an
3485 * encoder and a decoder can share the same name).
3486 * This is the primary way to find a codec from the user perspective.
3487 */
3488 const char *name;
3489 /**
3490 * Descriptive name for the codec, meant to be more human readable than name.
3491 * You should use the NULL_IF_CONFIG_SMALL() macro to define it.
3492 */
3493 const char *long_name;
3496 /**
3497 * Codec capabilities.
3498 * see AV_CODEC_CAP_*
3499 */
3501 const AVRational *supported_framerates; ///< array of supported framerates, or NULL if any, array is terminated by {0,0}
3502 const enum AVPixelFormat *pix_fmts; ///< array of supported pixel formats, or NULL if unknown, array is terminated by -1
3503 const int *supported_samplerates; ///< array of supported audio samplerates, or NULL if unknown, array is terminated by 0
3504 const enum AVSampleFormat *sample_fmts; ///< array of supported sample formats, or NULL if unknown, array is terminated by -1
3505 const uint64_t *channel_layouts; ///< array of support channel layouts, or NULL if unknown. array is terminated by 0
3506 uint8_t max_lowres; ///< maximum value for lowres supported by the decoder
3507 const AVClass *priv_class; ///< AVClass for the private context
3508 const AVProfile *profiles; ///< array of recognized profiles, or NULL if unknown, array is terminated by {FF_PROFILE_UNKNOWN}
3509
3510 /**
3511 * Group name of the codec implementation.
3512 * This is a short symbolic name of the wrapper backing this codec. A
3513 * wrapper uses some kind of external implementation for the codec, such
3514 * as an external library, or a codec implementation provided by the OS or
3515 * the hardware.
3516 * If this field is NULL, this is a builtin, libavcodec native codec.
3517 * If non-NULL, this will be the suffix in AVCodec.name in most cases
3518 * (usually AVCodec.name will be of the form "<codec_name>_<wrapper_name>").
3519 */
3520 const char *wrapper_name;
3521
3522 /*****************************************************************
3523 * No fields below this line are part of the public API. They
3524 * may not be used outside of libavcodec and can be changed and
3525 * removed at will.
3526 * New public fields should be added right above.
3527 *****************************************************************
3528 */
3530 struct AVCodec *next;
3531 /**
3532 * @name Frame-level threading support functions
3533 * @{
3534 */
3535 /**
3536 * If defined, called on thread contexts when they are created.
3537 * If the codec allocates writable tables in init(), re-allocate them here.
3538 * priv_data will be set to a copy of the original.
3539 */
3541 /**
3542 * Copy necessary context variables from a previous thread context to the current one.
3543 * If not defined, the next thread will start automatically; otherwise, the codec
3544 * must call ff_thread_finish_setup().
3545 *
3546 * dst and src will (rarely) point to the same context, in which case memcpy should be skipped.
3547 */
3549 /** @} */
3550
3551 /**
3552 * Private codec-specific defaults.
3553 */
3555
3556 /**
3557 * Initialize codec static data, called from avcodec_register().
3558 *
3559 * This is not intended for time consuming operations as it is
3560 * run for every codec regardless of that codec being used.
3561 */
3562 void (*init_static_data)(struct AVCodec *codec);
3563
3565 int (*encode_sub)(AVCodecContext *, uint8_t *buf, int buf_size,
3566 const struct AVSubtitle *sub);
3567 /**
3568 * Encode data to an AVPacket.
3569 *
3570 * @param avctx codec context
3571 * @param avpkt output AVPacket (may contain a user-provided buffer)
3572 * @param[in] frame AVFrame containing the raw data to be encoded
3573 * @param[out] got_packet_ptr encoder sets to 0 or 1 to indicate that a
3574 * non-empty packet was returned in avpkt.
3575 * @return 0 on success, negative error code on failure
3576 */
3577 int (*encode2)(AVCodecContext *avctx, AVPacket *avpkt, const AVFrame *frame,
3578 int *got_packet_ptr);
3579 int (*decode)(AVCodecContext *, void *outdata, int *outdata_size, AVPacket *avpkt);
3581 /**
3582 * Encode API with decoupled packet/frame dataflow. The API is the
3583 * same as the avcodec_ prefixed APIs (avcodec_send_frame() etc.), except
3584 * that:
3585 * - never called if the codec is closed or the wrong type,
3586 * - if AV_CODEC_CAP_DELAY is not set, drain frames are never sent,
3587 * - only one drain frame is ever passed down,
3588 */
3589 int (*send_frame)(AVCodecContext *avctx, const AVFrame *frame);
3591
3592 /**
3593 * Decode API with decoupled packet/frame dataflow. This function is called
3594 * to get one output frame. It should call ff_decode_get_packet() to obtain
3595 * input data.
3596 */
3598 /**
3599 * Flush buffers.
3600 * Will be called when seeking
3601 */
3603 /**
3604 * Internal codec capabilities.
3605 * See FF_CODEC_CAP_* in internal.h
3606 */
3608
3609 /**
3610 * Decoding only, a comma-separated list of bitstream filters to apply to
3611 * packets before decoding.
3612 */
3613 const char *bsfs;
3614
3615 /**
3616 * Array of pointers to hardware configurations supported by the codec,
3617 * or NULL if no hardware supported. The array is terminated by a NULL
3618 * pointer.
3619 *
3620 * The user can only access this field via avcodec_get_hw_config().
3621 */
3622 const struct AVCodecHWConfigInternal **hw_configs;
3623} AVCodec;
3624
3625#if FF_API_CODEC_GET_SET
3628#endif
3629
3630struct MpegEncContext;
3631
3632/**
3633 * Retrieve supported hardware configurations for a codec.
3634 *
3635 * Values of index from zero to some maximum return the indexed configuration
3636 * descriptor; all other values return NULL. If the codec does not support
3637 * any hardware configurations then it will always return NULL.
3638 */
3639const AVCodecHWConfig *avcodec_get_hw_config(const AVCodec *codec, int index);
3640
3641/**
3642 * @defgroup lavc_hwaccel AVHWAccel
3643 *
3644 * @note Nothing in this structure should be accessed by the user. At some
3645 * point in future it will not be externally visible at all.
3646 *
3647 * @{
3648 */
3649typedef struct AVHWAccel {
3650 /**
3651 * Name of the hardware accelerated codec.
3652 * The name is globally unique among encoders and among decoders (but an
3653 * encoder and a decoder can share the same name).
3654 */
3655 const char *name;
3656
3657 /**
3658 * Type of codec implemented by the hardware accelerator.
3659 *
3660 * See AVMEDIA_TYPE_xxx
3661 */
3663
3664 /**
3665 * Codec implemented by the hardware accelerator.
3666 *
3667 * See AV_CODEC_ID_xxx
3668 */
3670
3671 /**
3672 * Supported pixel format.
3673 *
3674 * Only hardware accelerated formats are supported here.
3675 */
3677
3678 /**
3679 * Hardware accelerated codec capabilities.
3680 * see AV_HWACCEL_CODEC_CAP_*
3681 */
3683
3684 /*****************************************************************
3685 * No fields below this line are part of the public API. They
3686 * may not be used outside of libavcodec and can be changed and
3687 * removed at will.
3688 * New public fields should be added right above.
3689 *****************************************************************
3690 */
3691
3692 /**
3693 * Allocate a custom buffer
3694 */
3696
3697 /**
3698 * Called at the beginning of each frame or field picture.
3699 *
3700 * Meaningful frame information (codec specific) is guaranteed to
3701 * be parsed at this point. This function is mandatory.
3702 *
3703 * Note that buf can be NULL along with buf_size set to 0.
3704 * Otherwise, this means the whole frame is available at this point.
3705 *
3706 * @param avctx the codec context
3707 * @param buf the frame data buffer base
3708 * @param buf_size the size of the frame in bytes
3709 * @return zero if successful, a negative value otherwise
3710 */
3711 int (*start_frame)(AVCodecContext *avctx, const uint8_t *buf, uint32_t buf_size);
3712
3713 /**
3714 * Callback for parameter data (SPS/PPS/VPS etc).
3715 *
3716 * Useful for hardware decoders which keep persistent state about the
3717 * video parameters, and need to receive any changes to update that state.
3718 *
3719 * @param avctx the codec context
3720 * @param type the nal unit type
3721 * @param buf the nal unit data buffer
3722 * @param buf_size the size of the nal unit in bytes
3723 * @return zero if successful, a negative value otherwise
3724 */
3725 int (*decode_params)(AVCodecContext *avctx, int type, const uint8_t *buf, uint32_t buf_size);
3726
3727 /**
3728 * Callback for each slice.
3729 *
3730 * Meaningful slice information (codec specific) is guaranteed to
3731 * be parsed at this point. This function is mandatory.
3732 * The only exception is XvMC, that works on MB level.
3733 *
3734 * @param avctx the codec context
3735 * @param buf the slice data buffer base
3736 * @param buf_size the size of the slice in bytes
3737 * @return zero if successful, a negative value otherwise
3738 */
3739 int (*decode_slice)(AVCodecContext *avctx, const uint8_t *buf, uint32_t buf_size);
3740
3741 /**
3742 * Called at the end of each frame or field picture.
3743 *
3744 * The whole picture is parsed at this point and can now be sent
3745 * to the hardware accelerator. This function is mandatory.
3746 *
3747 * @param avctx the codec context
3748 * @return zero if successful, a negative value otherwise
3749 */
3751
3752 /**
3753 * Size of per-frame hardware accelerator private data.
3754 *
3755 * Private data is allocated with av_mallocz() before
3756 * AVCodecContext.get_buffer() and deallocated after
3757 * AVCodecContext.release_buffer().
3758 */
3760
3761 /**
3762 * Called for every Macroblock in a slice.
3763 *
3764 * XvMC uses it to replace the ff_mpv_reconstruct_mb().
3765 * Instead of decoding to raw picture, MB parameters are
3766 * stored in an array provided by the video driver.
3767 *
3768 * @param s the mpeg context
3769 */
3770 void (*decode_mb)(struct MpegEncContext *s);
3771
3772 /**
3773 * Initialize the hwaccel private data.
3774 *
3775 * This will be called from ff_get_format(), after hwaccel and
3776 * hwaccel_context are set and the hwaccel private data in AVCodecInternal
3777 * is allocated.
3778 */
3779 int (*init)(AVCodecContext *avctx);
3780
3781 /**
3782 * Uninitialize the hwaccel private data.
3783 *
3784 * This will be called from get_format() or avcodec_close(), after hwaccel
3785 * and hwaccel_context are already uninitialized.
3786 */
3787 int (*uninit)(AVCodecContext *avctx);
3788
3789 /**
3790 * Size of the private data to allocate in
3791 * AVCodecInternal.hwaccel_priv_data.
3792 */
3794
3795 /**
3796 * Internal hwaccel capabilities.
3797 */
3799
3800 /**
3801 * Fill the given hw_frames context with current codec parameters. Called
3802 * from get_format. Refer to avcodec_get_hw_frames_parameters() for
3803 * details.
3804 *
3805 * This CAN be called before AVHWAccel.init is called, and you must assume
3806 * that avctx->hwaccel_priv_data is invalid.
3807 */
3808 int (*frame_params)(AVCodecContext *avctx, AVBufferRef *hw_frames_ctx);
3809} AVHWAccel;
3810
3811/**
3812 * HWAccel is experimental and is thus avoided in favor of non experimental
3813 * codecs
3814 */
3815#define AV_HWACCEL_CODEC_CAP_EXPERIMENTAL 0x0200
3816
3817/**
3818 * Hardware acceleration should be used for decoding even if the codec level
3819 * used is unknown or higher than the maximum supported level reported by the
3820 * hardware driver.
3821 *
3822 * It's generally a good idea to pass this flag unless you have a specific
3823 * reason not to, as hardware tends to under-report supported levels.
3824 */
3825#define AV_HWACCEL_FLAG_IGNORE_LEVEL (1 << 0)
3826
3827/**
3828 * Hardware acceleration can output YUV pixel formats with a different chroma
3829 * sampling than 4:2:0 and/or other than 8 bits per component.
3830 */
3831#define AV_HWACCEL_FLAG_ALLOW_HIGH_DEPTH (1 << 1)
3832
3833/**
3834 * Hardware acceleration should still be attempted for decoding when the
3835 * codec profile does not match the reported capabilities of the hardware.
3836 *
3837 * For example, this can be used to try to decode baseline profile H.264
3838 * streams in hardware - it will often succeed, because many streams marked
3839 * as baseline profile actually conform to constrained baseline profile.
3840 *
3841 * @warning If the stream is actually not supported then the behaviour is
3842 * undefined, and may include returning entirely incorrect output
3843 * while indicating success.
3844 */
3845#define AV_HWACCEL_FLAG_ALLOW_PROFILE_MISMATCH (1 << 2)
3846
3847/**
3848 * @}
3849 */
3850
3851#if FF_API_AVPICTURE
3852/**
3853 * @defgroup lavc_picture AVPicture
3854 *
3855 * Functions for working with AVPicture
3856 * @{
3857 */
3858
3859/**
3860 * Picture data structure.
3861 *
3862 * Up to four components can be stored into it, the last component is
3863 * alpha.
3864 * @deprecated use AVFrame or imgutils functions instead
3865 */
3866typedef struct AVPicture {
3868 uint8_t *data[AV_NUM_DATA_POINTERS]; ///< pointers to the image data planes
3870 int linesize[AV_NUM_DATA_POINTERS]; ///< number of bytes per line
3871} AVPicture;
3872
3873/**
3874 * @}
3875 */
3876#endif
3877
3880
3881 SUBTITLE_BITMAP, ///< A bitmap, pict will be set
3882
3883 /**
3884 * Plain text, the text field must be set by the decoder and is
3885 * authoritative. ass and pict fields may contain approximations.
3886 */
3888
3889 /**
3890 * Formatted text, the ass field must be set by the decoder and is
3891 * authoritative. pict and text fields may contain approximations.
3892 */
3894};
3895
3896#define AV_SUBTITLE_FLAG_FORCED 0x00000001
3897
3898typedef struct AVSubtitleRect {
3899 int x; ///< top left corner of pict, undefined when pict is not set
3900 int y; ///< top left corner of pict, undefined when pict is not set
3901 int w; ///< width of pict, undefined when pict is not set
3902 int h; ///< height of pict, undefined when pict is not set
3903 int nb_colors; ///< number of colors in pict, undefined when pict is not set
3904
3905#if FF_API_AVPICTURE
3906 /**
3907 * @deprecated unused
3908 */
3911#endif
3912 /**
3913 * data+linesize for the bitmap of this subtitle.
3914 * Can be set for text/ass as well once they are rendered.
3915 */
3916 uint8_t *data[4];
3917 int linesize[4];
3918
3920
3921 char *text; ///< 0 terminated plain UTF-8 text
3922
3923 /**
3924 * 0 terminated ASS/SSA compatible event line.
3925 * The presentation of this is unaffected by the other values in this
3926 * struct.
3927 */
3928 char *ass;
3929
3932
3933typedef struct AVSubtitle {
3934 uint16_t format; /* 0 = graphics */
3935 uint32_t start_display_time; /* relative to packet pts, in ms */
3936 uint32_t end_display_time; /* relative to packet pts, in ms */
3937 unsigned num_rects;
3939 int64_t pts; ///< Same as packet pts, in AV_TIME_BASE
3940} AVSubtitle;
3941
3942/**
3943 * This struct describes the properties of an encoded stream.
3944 *
3945 * sizeof(AVCodecParameters) is not a part of the public ABI, this struct must
3946 * be allocated with avcodec_parameters_alloc() and freed with
3947 * avcodec_parameters_free().
3948 */
3949typedef struct AVCodecParameters {
3950 /**
3951 * General type of the encoded data.
3952 */
3954 /**
3955 * Specific type of the encoded data (the codec used).
3956 */
3958 /**
3959 * Additional information about the codec (corresponds to the AVI FOURCC).
3960 */
3961 uint32_t codec_tag;
3962
3963 /**
3964 * Extra binary data needed for initializing the decoder, codec-dependent.
3965 *
3966 * Must be allocated with av_malloc() and will be freed by
3967 * avcodec_parameters_free(). The allocated size of extradata must be at
3968 * least extradata_size + AV_INPUT_BUFFER_PADDING_SIZE, with the padding
3969 * bytes zeroed.
3970 */
3971 uint8_t *extradata;
3972 /**
3973 * Size of the extradata content in bytes.
3974 */
3976
3977 /**
3978 * - video: the pixel format, the value corresponds to enum AVPixelFormat.
3979 * - audio: the sample format, the value corresponds to enum AVSampleFormat.
3980 */
3982
3983 /**
3984 * The average bitrate of the encoded data (in bits per second).
3985 */
3986 int64_t bit_rate;
3987
3988 /**
3989 * The number of bits per sample in the codedwords.
3990 *
3991 * This is basically the bitrate per sample. It is mandatory for a bunch of
3992 * formats to actually decode them. It's the number of bits for one sample in
3993 * the actual coded bitstream.
3994 *
3995 * This could be for example 4 for ADPCM
3996 * For PCM formats this matches bits_per_raw_sample
3997 * Can be 0
3998 */
4000
4001 /**
4002 * This is the number of valid bits in each output sample. If the
4003 * sample format has more bits, the least significant bits are additional
4004 * padding bits, which are always 0. Use right shifts to reduce the sample
4005 * to its actual size. For example, audio formats with 24 bit samples will
4006 * have bits_per_raw_sample set to 24, and format set to AV_SAMPLE_FMT_S32.
4007 * To get the original sample use "(int32_t)sample >> 8"."
4008 *
4009 * For ADPCM this might be 12 or 16 or similar
4010 * Can be 0
4011 */
4013
4014 /**
4015 * Codec-specific bitstream restrictions that the stream conforms to.
4016 */
4019
4020 /**
4021 * Video only. The dimensions of the video frame in pixels.
4022 */
4025
4026 /**
4027 * Video only. The aspect ratio (width / height) which a single pixel
4028 * should have when displayed.
4029 *
4030 * When the aspect ratio is unknown / undefined, the numerator should be
4031 * set to 0 (the denominator may have any value).
4032 */
4034
4035 /**
4036 * Video only. The order of the fields in interlaced video.
4037 */
4039
4040 /**
4041 * Video only. Additional colorspace characteristics.
4042 */
4048
4049 /**
4050 * Video only. Number of delayed frames.
4051 */
4053
4054 /**
4055 * Audio only. The channel layout bitmask. May be 0 if the channel layout is
4056 * unknown or unspecified, otherwise the number of bits set must be equal to
4057 * the channels field.
4058 */
4060 /**
4061 * Audio only. The number of audio channels.
4062 */
4064 /**
4065 * Audio only. The number of audio samples per second.
4066 */
4068 /**
4069 * Audio only. The number of bytes per coded audio frame, required by some
4070 * formats.
4071 *
4072 * Corresponds to nBlockAlign in WAVEFORMATEX.
4073 */
4075 /**
4076 * Audio only. Audio frame size, if known. Required by some formats to be static.
4077 */
4079
4080 /**
4081 * Audio only. The amount of padding (in samples) inserted by the encoder at
4082 * the beginning of the audio. I.e. this number of leading decoded samples
4083 * must be discarded by the caller to get the original audio without leading
4084 * padding.
4085 */
4087 /**
4088 * Audio only. The amount of padding (in samples) appended by the encoder to
4089 * the end of the audio. I.e. this number of decoded samples must be
4090 * discarded by the caller from the end of the stream to get the original
4091 * audio without any trailing padding.
4092 */
4094 /**
4095 * Audio only. Number of samples to skip after a discontinuity.
4096 */
4099
4100/**
4101 * Iterate over all registered codecs.
4102 *
4103 * @param opaque a pointer where libavcodec will store the iteration state. Must
4104 * point to NULL to start the iteration.
4105 *
4106 * @return the next registered codec or NULL when the iteration is
4107 * finished
4108 */
4109const AVCodec *av_codec_iterate(void **opaque);
4110
4111#if FF_API_NEXT
4112/**
4113 * If c is NULL, returns the first registered codec,
4114 * if c is non-NULL, returns the next registered codec after c,
4115 * or NULL if c is the last one.
4116 */
4119#endif
4120
4121/**
4122 * Return the LIBAVCODEC_VERSION_INT constant.
4123 */
4124unsigned avcodec_version(void);
4125
4126/**
4127 * Return the libavcodec build-time configuration.
4128 */
4129const char *avcodec_configuration(void);
4130
4131/**
4132 * Return the libavcodec license.
4133 */
4134const char *avcodec_license(void);
4135
4136#if FF_API_NEXT
4137/**
4138 * Register the codec codec and initialize libavcodec.
4139 *
4140 * @warning either this function or avcodec_register_all() must be called
4141 * before any other libavcodec functions.
4142 *
4143 * @see avcodec_register_all()
4144 */
4147
4148/**
4149 * Register all the codecs, parsers and bitstream filters which were enabled at
4150 * configuration time. If you do not call this function you can select exactly
4151 * which formats you want to support, by using the individual registration
4152 * functions.
4153 *
4154 * @see avcodec_register
4155 * @see av_register_codec_parser
4156 * @see av_register_bitstream_filter
4157 */
4160#endif
4161
4162/**
4163 * Allocate an AVCodecContext and set its fields to default values. The
4164 * resulting struct should be freed with avcodec_free_context().
4165 *
4166 * @param codec if non-NULL, allocate private data and initialize defaults
4167 * for the given codec. It is illegal to then call avcodec_open2()
4168 * with a different codec.
4169 * If NULL, then the codec-specific defaults won't be initialized,
4170 * which may result in suboptimal default settings (this is
4171 * important mainly for encoders, e.g. libx264).
4172 *
4173 * @return An AVCodecContext filled with default values or NULL on failure.
4174 */
4176
4177/**
4178 * Free the codec context and everything associated with it and write NULL to
4179 * the provided pointer.
4180 */
4182
4183#if FF_API_GET_CONTEXT_DEFAULTS
4184/**
4185 * @deprecated This function should not be used, as closing and opening a codec
4186 * context multiple time is not supported. A new codec context should be
4187 * allocated for each new use.
4188 */
4190#endif
4191
4192/**
4193 * Get the AVClass for AVCodecContext. It can be used in combination with
4194 * AV_OPT_SEARCH_FAKE_OBJ for examining options.
4195 *
4196 * @see av_opt_find().
4197 */
4199
4200#if FF_API_COPY_CONTEXT
4201/**
4202 * Get the AVClass for AVFrame. It can be used in combination with
4203 * AV_OPT_SEARCH_FAKE_OBJ for examining options.
4204 *
4205 * @see av_opt_find().
4206 */
4208
4209/**
4210 * Get the AVClass for AVSubtitleRect. It can be used in combination with
4211 * AV_OPT_SEARCH_FAKE_OBJ for examining options.
4212 *
4213 * @see av_opt_find().
4214 */
4216
4217/**
4218 * Copy the settings of the source AVCodecContext into the destination
4219 * AVCodecContext. The resulting destination codec context will be
4220 * unopened, i.e. you are required to call avcodec_open2() before you
4221 * can use this AVCodecContext to decode/encode video/audio data.
4222 *
4223 * @param dest target codec context, should be initialized with
4224 * avcodec_alloc_context3(NULL), but otherwise uninitialized
4225 * @param src source codec context
4226 * @return AVERROR() on error (e.g. memory allocation error), 0 on success
4227 *
4228 * @deprecated The semantics of this function are ill-defined and it should not
4229 * be used. If you need to transfer the stream parameters from one codec context
4230 * to another, use an intermediate AVCodecParameters instance and the
4231 * avcodec_parameters_from_context() / avcodec_parameters_to_context()
4232 * functions.
4233 */
4236#endif
4237
4238/**
4239 * Allocate a new AVCodecParameters and set its fields to default values
4240 * (unknown/invalid/0). The returned struct must be freed with
4241 * avcodec_parameters_free().
4242 */
4244
4245/**
4246 * Free an AVCodecParameters instance and everything associated with it and
4247 * write NULL to the supplied pointer.
4248 */
4250
4251/**
4252 * Copy the contents of src to dst. Any allocated fields in dst are freed and
4253 * replaced with newly allocated duplicates of the corresponding fields in src.
4254 *
4255 * @return >= 0 on success, a negative AVERROR code on failure.
4256 */
4258
4259/**
4260 * Fill the parameters struct based on the values from the supplied codec
4261 * context. Any allocated fields in par are freed and replaced with duplicates
4262 * of the corresponding fields in codec.
4263 *
4264 * @return >= 0 on success, a negative AVERROR code on failure
4265 */
4267 const AVCodecContext *codec);
4268
4269/**
4270 * Fill the codec context based on the values from the supplied codec
4271 * parameters. Any allocated fields in codec that have a corresponding field in
4272 * par are freed and replaced with duplicates of the corresponding field in par.
4273 * Fields in codec that do not have a counterpart in par are not touched.
4274 *
4275 * @return >= 0 on success, a negative AVERROR code on failure.
4276 */
4278 const AVCodecParameters *par);
4279
4280/**
4281 * Initialize the AVCodecContext to use the given AVCodec. Prior to using this
4282 * function the context has to be allocated with avcodec_alloc_context3().
4283 *
4284 * The functions avcodec_find_decoder_by_name(), avcodec_find_encoder_by_name(),
4285 * avcodec_find_decoder() and avcodec_find_encoder() provide an easy way for
4286 * retrieving a codec.
4287 *
4288 * @warning This function is not thread safe!
4289 *
4290 * @note Always call this function before using decoding routines (such as
4291 * @ref avcodec_receive_frame()).
4292 *
4293 * @code
4294 * avcodec_register_all();
4295 * av_dict_set(&opts, "b", "2.5M", 0);
4296 * codec = avcodec_find_decoder(AV_CODEC_ID_H264);
4297 * if (!codec)
4298 * exit(1);
4299 *
4300 * context = avcodec_alloc_context3(codec);
4301 *
4302 * if (avcodec_open2(context, codec, opts) < 0)
4303 * exit(1);
4304 * @endcode
4305 *
4306 * @param avctx The context to initialize.
4307 * @param codec The codec to open this context for. If a non-NULL codec has been
4308 * previously passed to avcodec_alloc_context3() or
4309 * for this context, then this parameter MUST be either NULL or
4310 * equal to the previously passed codec.
4311 * @param options A dictionary filled with AVCodecContext and codec-private options.
4312 * On return this object will be filled with options that were not found.
4313 *
4314 * @return zero on success, a negative value on error
4315 * @see avcodec_alloc_context3(), avcodec_find_decoder(), avcodec_find_encoder(),
4316 * av_dict_set(), av_opt_find().
4317 */
4318int avcodec_open2(AVCodecContext *avctx, const AVCodec *codec, AVDictionary **options);
4319
4320/**
4321 * Close a given AVCodecContext and free all the data associated with it
4322 * (but not the AVCodecContext itself).
4323 *
4324 * Calling this function on an AVCodecContext that hasn't been opened will free
4325 * the codec-specific data allocated in avcodec_alloc_context3() with a non-NULL
4326 * codec. Subsequent calls will do nothing.
4327 *
4328 * @note Do not use this function. Use avcodec_free_context() to destroy a
4329 * codec context (either open or closed). Opening and closing a codec context
4330 * multiple times is not supported anymore -- use multiple codec contexts
4331 * instead.
4332 */
4334
4335/**
4336 * Free all allocated data in the given subtitle struct.
4337 *
4338 * @param sub AVSubtitle to free.
4339 */
4341
4342/**
4343 * @}
4344 */
4345
4346/**
4347 * @addtogroup lavc_packet
4348 * @{
4349 */
4350
4351/**
4352 * Allocate an AVPacket and set its fields to default values. The resulting
4353 * struct must be freed using av_packet_free().
4354 *
4355 * @return An AVPacket filled with default values or NULL on failure.
4356 *
4357 * @note this only allocates the AVPacket itself, not the data buffers. Those
4358 * must be allocated through other means such as av_new_packet.
4359 *
4360 * @see av_new_packet
4361 */
4363
4364/**
4365 * Create a new packet that references the same data as src.
4366 *
4367 * This is a shortcut for av_packet_alloc()+av_packet_ref().
4368 *
4369 * @return newly created AVPacket on success, NULL on error.
4370 *
4371 * @see av_packet_alloc
4372 * @see av_packet_ref
4373 */
4375
4376/**
4377 * Free the packet, if the packet is reference counted, it will be
4378 * unreferenced first.
4379 *
4380 * @param pkt packet to be freed. The pointer will be set to NULL.
4381 * @note passing NULL is a no-op.
4382 */
4384
4385/**
4386 * Initialize optional fields of a packet with default values.
4387 *
4388 * Note, this does not touch the data and size members, which have to be
4389 * initialized separately.
4390 *
4391 * @param pkt packet
4392 */
4394
4395/**
4396 * Allocate the payload of a packet and initialize its fields with
4397 * default values.
4398 *
4399 * @param pkt packet
4400 * @param size wanted payload size
4401 * @return 0 if OK, AVERROR_xxx otherwise
4402 */
4404
4405/**
4406 * Reduce packet size, correctly zeroing padding
4407 *
4408 * @param pkt packet
4409 * @param size new size
4410 */
4412
4413/**
4414 * Increase packet size, correctly zeroing padding
4415 *
4416 * @param pkt packet
4417 * @param grow_by number of bytes by which to increase the size of the packet
4418 */
4419int av_grow_packet(AVPacket *pkt, int grow_by);
4420
4421/**
4422 * Initialize a reference-counted packet from av_malloc()ed data.
4423 *
4424 * @param pkt packet to be initialized. This function will set the data, size,
4425 * and buf fields, all others are left untouched.
4426 * @param data Data allocated by av_malloc() to be used as packet data. If this
4427 * function returns successfully, the data is owned by the underlying AVBuffer.
4428 * The caller may not access the data through other means.
4429 * @param size size of data in bytes, without the padding. I.e. the full buffer
4430 * size is assumed to be size + AV_INPUT_BUFFER_PADDING_SIZE.
4431 *
4432 * @return 0 on success, a negative AVERROR on error
4433 */
4434int av_packet_from_data(AVPacket *pkt, uint8_t *data, int size);
4435
4436#if FF_API_AVPACKET_OLD_API
4437/**
4438 * @warning This is a hack - the packet memory allocation stuff is broken. The
4439 * packet is allocated if it was not really allocated.
4440 *
4441 * @deprecated Use av_packet_ref or av_packet_make_refcounted
4442 */
4445/**
4446 * Copy packet, including contents
4447 *
4448 * @return 0 on success, negative AVERROR on fail
4449 *
4450 * @deprecated Use av_packet_ref
4451 */
4453int av_copy_packet(AVPacket *dst, const AVPacket *src);
4454
4455/**
4456 * Copy packet side data
4457 *
4458 * @return 0 on success, negative AVERROR on fail
4459 *
4460 * @deprecated Use av_packet_copy_props
4461 */
4464
4465/**
4466 * Free a packet.
4467 *
4468 * @deprecated Use av_packet_unref
4469 *
4470 * @param pkt packet to free
4471 */
4474#endif
4475/**
4476 * Allocate new information of a packet.
4477 *
4478 * @param pkt packet
4479 * @param type side information type
4480 * @param size side information size
4481 * @return pointer to fresh allocated data or NULL otherwise
4482 */
4484 int size);
4485
4486/**
4487 * Wrap an existing array as a packet side data.
4488 *
4489 * @param pkt packet
4490 * @param type side information type
4491 * @param data the side data array. It must be allocated with the av_malloc()
4492 * family of functions. The ownership of the data is transferred to
4493 * pkt.
4494 * @param size side information size
4495 * @return a non-negative number on success, a negative AVERROR code on
4496 * failure. On failure, the packet is unchanged and the data remains
4497 * owned by the caller.
4498 */
4500 uint8_t *data, size_t size);
4501
4502/**
4503 * Shrink the already allocated side data buffer
4504 *
4505 * @param pkt packet
4506 * @param type side information type
4507 * @param size new side information size
4508 * @return 0 on success, < 0 on failure
4509 */
4511 int size);
4512
4513/**
4514 * Get side information from packet.
4515 *
4516 * @param pkt packet
4517 * @param type desired side information type
4518 * @param size pointer for side information size to store (optional)
4519 * @return pointer to data if present or NULL otherwise
4520 */
4522 int *size);
4523
4524#if FF_API_MERGE_SD_API
4527
4530#endif
4531
4533
4534/**
4535 * Pack a dictionary for use in side_data.
4536 *
4537 * @param dict The dictionary to pack.
4538 * @param size pointer to store the size of the returned data
4539 * @return pointer to data if successful, NULL otherwise
4540 */
4541uint8_t *av_packet_pack_dictionary(AVDictionary *dict, int *size);
4542/**
4543 * Unpack a dictionary from side_data.
4544 *
4545 * @param data data from side_data
4546 * @param size size of the data
4547 * @param dict the metadata storage dictionary
4548 * @return 0 on success, < 0 on failure
4549 */
4550int av_packet_unpack_dictionary(const uint8_t *data, int size, AVDictionary **dict);
4551
4552
4553/**
4554 * Convenience function to free all the side data stored.
4555 * All the other fields stay untouched.
4556 *
4557 * @param pkt packet
4558 */
4560
4561/**
4562 * Setup a new reference to the data described by a given packet
4563 *
4564 * If src is reference-counted, setup dst as a new reference to the
4565 * buffer in src. Otherwise allocate a new buffer in dst and copy the
4566 * data from src into it.
4567 *
4568 * All the other fields are copied from src.
4569 *
4570 * @see av_packet_unref
4571 *
4572 * @param dst Destination packet
4573 * @param src Source packet
4574 *
4575 * @return 0 on success, a negative AVERROR on error.
4576 */
4577int av_packet_ref(AVPacket *dst, const AVPacket *src);
4578
4579/**
4580 * Wipe the packet.
4581 *
4582 * Unreference the buffer referenced by the packet and reset the
4583 * remaining packet fields to their default values.
4584 *
4585 * @param pkt The packet to be unreferenced.
4586 */
4588
4589/**
4590 * Move every field in src to dst and reset src.
4591 *
4592 * @see av_packet_unref
4593 *
4594 * @param src Source packet, will be reset
4595 * @param dst Destination packet
4596 */
4598
4599/**
4600 * Copy only "properties" fields from src to dst.
4601 *
4602 * Properties for the purpose of this function are all the fields
4603 * beside those related to the packet data (buf, data, size)
4604 *
4605 * @param dst Destination packet
4606 * @param src Source packet
4607 *
4608 * @return 0 on success AVERROR on failure.
4609 */
4611
4612/**
4613 * Ensure the data described by a given packet is reference counted.
4614 *
4615 * @note This function does not ensure that the reference will be writable.
4616 * Use av_packet_make_writable instead for that purpose.
4617 *
4618 * @see av_packet_ref
4619 * @see av_packet_make_writable
4620 *
4621 * @param pkt packet whose data should be made reference counted.
4622 *
4623 * @return 0 on success, a negative AVERROR on error. On failure, the
4624 * packet is unchanged.
4625 */
4627
4628/**
4629 * Create a writable reference for the data described by a given packet,
4630 * avoiding data copy if possible.
4631 *
4632 * @param pkt Packet whose data should be made writable.
4633 *
4634 * @return 0 on success, a negative AVERROR on failure. On failure, the
4635 * packet is unchanged.
4636 */
4638
4639/**
4640 * Convert valid timing fields (timestamps / durations) in a packet from one
4641 * timebase to another. Timestamps with unknown values (AV_NOPTS_VALUE) will be
4642 * ignored.
4643 *
4644 * @param pkt packet on which the conversion will be performed
4645 * @param tb_src source timebase, in which the timing fields in pkt are
4646 * expressed
4647 * @param tb_dst destination timebase, to which the timing fields will be
4648 * converted
4649 */
4651
4652/**
4653 * @}
4654 */
4655
4656/**
4657 * @addtogroup lavc_decoding
4658 * @{
4659 */
4660
4661/**
4662 * Find a registered decoder with a matching codec ID.
4663 *
4664 * @param id AVCodecID of the requested decoder
4665 * @return A decoder if one was found, NULL otherwise.
4666 */
4668
4669/**
4670 * Find a registered decoder with the specified name.
4671 *
4672 * @param name name of the requested decoder
4673 * @return A decoder if one was found, NULL otherwise.
4674 */
4676
4677/**
4678 * The default callback for AVCodecContext.get_buffer2(). It is made public so
4679 * it can be called by custom get_buffer2() implementations for decoders without
4680 * AV_CODEC_CAP_DR1 set.
4681 */
4683
4684/**
4685 * Modify width and height values so that they will result in a memory
4686 * buffer that is acceptable for the codec if you do not use any horizontal
4687 * padding.
4688 *
4689 * May only be used if a codec with AV_CODEC_CAP_DR1 has been opened.
4690 */
4692
4693/**
4694 * Modify width and height values so that they will result in a memory
4695 * buffer that is acceptable for the codec if you also ensure that all
4696 * line sizes are a multiple of the respective linesize_align[i].
4697 *
4698 * May only be used if a codec with AV_CODEC_CAP_DR1 has been opened.
4699 */
4701 int linesize_align[AV_NUM_DATA_POINTERS]);
4702
4703/**
4704 * Converts AVChromaLocation to swscale x/y chroma position.
4705 *
4706 * The positions represent the chroma (0,0) position in a coordinates system
4707 * with luma (0,0) representing the origin and luma(1,1) representing 256,256
4708 *
4709 * @param xpos horizontal chroma sample position
4710 * @param ypos vertical chroma sample position
4711 */
4712int avcodec_enum_to_chroma_pos(int *xpos, int *ypos, enum AVChromaLocation pos);
4713
4714/**
4715 * Converts swscale x/y chroma position to AVChromaLocation.
4716 *
4717 * The positions represent the chroma (0,0) position in a coordinates system
4718 * with luma (0,0) representing the origin and luma(1,1) representing 256,256
4719 *
4720 * @param xpos horizontal chroma sample position
4721 * @param ypos vertical chroma sample position
4722 */
4724
4725/**
4726 * Decode the audio frame of size avpkt->size from avpkt->data into frame.
4727 *
4728 * Some decoders may support multiple frames in a single AVPacket. Such
4729 * decoders would then just decode the first frame and the return value would be
4730 * less than the packet size. In this case, avcodec_decode_audio4 has to be
4731 * called again with an AVPacket containing the remaining data in order to
4732 * decode the second frame, etc... Even if no frames are returned, the packet
4733 * needs to be fed to the decoder with remaining data until it is completely
4734 * consumed or an error occurs.
4735 *
4736 * Some decoders (those marked with AV_CODEC_CAP_DELAY) have a delay between input
4737 * and output. This means that for some packets they will not immediately
4738 * produce decoded output and need to be flushed at the end of decoding to get
4739 * all the decoded data. Flushing is done by calling this function with packets
4740 * with avpkt->data set to NULL and avpkt->size set to 0 until it stops
4741 * returning samples. It is safe to flush even those decoders that are not
4742 * marked with AV_CODEC_CAP_DELAY, then no samples will be returned.
4743 *
4744 * @warning The input buffer, avpkt->data must be AV_INPUT_BUFFER_PADDING_SIZE
4745 * larger than the actual read bytes because some optimized bitstream
4746 * readers read 32 or 64 bits at once and could read over the end.
4747 *
4748 * @note The AVCodecContext MUST have been opened with @ref avcodec_open2()
4749 * before packets may be fed to the decoder.
4750 *
4751 * @param avctx the codec context
4752 * @param[out] frame The AVFrame in which to store decoded audio samples.
4753 * The decoder will allocate a buffer for the decoded frame by
4754 * calling the AVCodecContext.get_buffer2() callback.
4755 * When AVCodecContext.refcounted_frames is set to 1, the frame is
4756 * reference counted and the returned reference belongs to the
4757 * caller. The caller must release the frame using av_frame_unref()
4758 * when the frame is no longer needed. The caller may safely write
4759 * to the frame if av_frame_is_writable() returns 1.
4760 * When AVCodecContext.refcounted_frames is set to 0, the returned
4761 * reference belongs to the decoder and is valid only until the
4762 * next call to this function or until closing or flushing the
4763 * decoder. The caller may not write to it.
4764 * @param[out] got_frame_ptr Zero if no frame could be decoded, otherwise it is
4765 * non-zero. Note that this field being set to zero
4766 * does not mean that an error has occurred. For
4767 * decoders with AV_CODEC_CAP_DELAY set, no given decode
4768 * call is guaranteed to produce a frame.
4769 * @param[in] avpkt The input AVPacket containing the input buffer.
4770 * At least avpkt->data and avpkt->size should be set. Some
4771 * decoders might also require additional fields to be set.
4772 * @return A negative error code is returned if an error occurred during
4773 * decoding, otherwise the number of bytes consumed from the input
4774 * AVPacket is returned.
4775 *
4776* @deprecated Use avcodec_send_packet() and avcodec_receive_frame().
4777 */
4780 int *got_frame_ptr, const AVPacket *avpkt);
4781
4782/**
4783 * Decode the video frame of size avpkt->size from avpkt->data into picture.
4784 * Some decoders may support multiple frames in a single AVPacket, such
4785 * decoders would then just decode the first frame.
4786 *
4787 * @warning The input buffer must be AV_INPUT_BUFFER_PADDING_SIZE larger than
4788 * the actual read bytes because some optimized bitstream readers read 32 or 64
4789 * bits at once and could read over the end.
4790 *
4791 * @warning The end of the input buffer buf should be set to 0 to ensure that
4792 * no overreading happens for damaged MPEG streams.
4793 *
4794 * @note Codecs which have the AV_CODEC_CAP_DELAY capability set have a delay
4795 * between input and output, these need to be fed with avpkt->data=NULL,
4796 * avpkt->size=0 at the end to return the remaining frames.
4797 *
4798 * @note The AVCodecContext MUST have been opened with @ref avcodec_open2()
4799 * before packets may be fed to the decoder.
4800 *
4801 * @param avctx the codec context
4802 * @param[out] picture The AVFrame in which the decoded video frame will be stored.
4803 * Use av_frame_alloc() to get an AVFrame. The codec will
4804 * allocate memory for the actual bitmap by calling the
4805 * AVCodecContext.get_buffer2() callback.
4806 * When AVCodecContext.refcounted_frames is set to 1, the frame is
4807 * reference counted and the returned reference belongs to the
4808 * caller. The caller must release the frame using av_frame_unref()
4809 * when the frame is no longer needed. The caller may safely write
4810 * to the frame if av_frame_is_writable() returns 1.
4811 * When AVCodecContext.refcounted_frames is set to 0, the returned
4812 * reference belongs to the decoder and is valid only until the
4813 * next call to this function or until closing or flushing the
4814 * decoder. The caller may not write to it.
4815 *
4816 * @param[in] avpkt The input AVPacket containing the input buffer.
4817 * You can create such packet with av_init_packet() and by then setting
4818 * data and size, some decoders might in addition need other fields like
4819 * flags&AV_PKT_FLAG_KEY. All decoders are designed to use the least
4820 * fields possible.
4821 * @param[in,out] got_picture_ptr Zero if no frame could be decompressed, otherwise, it is nonzero.
4822 * @return On error a negative value is returned, otherwise the number of bytes
4823 * used or zero if no frame could be decompressed.
4824 *
4825 * @deprecated Use avcodec_send_packet() and avcodec_receive_frame().
4826 */
4829 int *got_picture_ptr,
4830 const AVPacket *avpkt);
4831
4832/**
4833 * Decode a subtitle message.
4834 * Return a negative value on error, otherwise return the number of bytes used.
4835 * If no subtitle could be decompressed, got_sub_ptr is zero.
4836 * Otherwise, the subtitle is stored in *sub.
4837 * Note that AV_CODEC_CAP_DR1 is not available for subtitle codecs. This is for
4838 * simplicity, because the performance difference is expect to be negligible
4839 * and reusing a get_buffer written for video codecs would probably perform badly
4840 * due to a potentially very different allocation pattern.
4841 *
4842 * Some decoders (those marked with AV_CODEC_CAP_DELAY) have a delay between input
4843 * and output. This means that for some packets they will not immediately
4844 * produce decoded output and need to be flushed at the end of decoding to get
4845 * all the decoded data. Flushing is done by calling this function with packets
4846 * with avpkt->data set to NULL and avpkt->size set to 0 until it stops
4847 * returning subtitles. It is safe to flush even those decoders that are not
4848 * marked with AV_CODEC_CAP_DELAY, then no subtitles will be returned.
4849 *
4850 * @note The AVCodecContext MUST have been opened with @ref avcodec_open2()
4851 * before packets may be fed to the decoder.
4852 *
4853 * @param avctx the codec context
4854 * @param[out] sub The Preallocated AVSubtitle in which the decoded subtitle will be stored,
4855 * must be freed with avsubtitle_free if *got_sub_ptr is set.
4856 * @param[in,out] got_sub_ptr Zero if no subtitle could be decompressed, otherwise, it is nonzero.
4857 * @param[in] avpkt The input AVPacket containing the input buffer.
4858 */
4860 int *got_sub_ptr,
4861 AVPacket *avpkt);
4862
4863/**
4864 * Supply raw packet data as input to a decoder.
4865 *
4866 * Internally, this call will copy relevant AVCodecContext fields, which can
4867 * influence decoding per-packet, and apply them when the packet is actually
4868 * decoded. (For example AVCodecContext.skip_frame, which might direct the
4869 * decoder to drop the frame contained by the packet sent with this function.)
4870 *
4871 * @warning The input buffer, avpkt->data must be AV_INPUT_BUFFER_PADDING_SIZE
4872 * larger than the actual read bytes because some optimized bitstream
4873 * readers read 32 or 64 bits at once and could read over the end.
4874 *
4875 * @warning Do not mix this API with the legacy API (like avcodec_decode_video2())
4876 * on the same AVCodecContext. It will return unexpected results now
4877 * or in future libavcodec versions.
4878 *
4879 * @note The AVCodecContext MUST have been opened with @ref avcodec_open2()
4880 * before packets may be fed to the decoder.
4881 *
4882 * @param avctx codec context
4883 * @param[in] avpkt The input AVPacket. Usually, this will be a single video
4884 * frame, or several complete audio frames.
4885 * Ownership of the packet remains with the caller, and the
4886 * decoder will not write to the packet. The decoder may create
4887 * a reference to the packet data (or copy it if the packet is
4888 * not reference-counted).
4889 * Unlike with older APIs, the packet is always fully consumed,
4890 * and if it contains multiple frames (e.g. some audio codecs),
4891 * will require you to call avcodec_receive_frame() multiple
4892 * times afterwards before you can send a new packet.
4893 * It can be NULL (or an AVPacket with data set to NULL and
4894 * size set to 0); in this case, it is considered a flush
4895 * packet, which signals the end of the stream. Sending the
4896 * first flush packet will return success. Subsequent ones are
4897 * unnecessary and will return AVERROR_EOF. If the decoder
4898 * still has frames buffered, it will return them after sending
4899 * a flush packet.
4900 *
4901 * @return 0 on success, otherwise negative error code:
4902 * AVERROR(EAGAIN): input is not accepted in the current state - user
4903 * must read output with avcodec_receive_frame() (once
4904 * all output is read, the packet should be resent, and
4905 * the call will not fail with EAGAIN).
4906 * AVERROR_EOF: the decoder has been flushed, and no new packets can
4907 * be sent to it (also returned if more than 1 flush
4908 * packet is sent)
4909 * AVERROR(EINVAL): codec not opened, it is an encoder, or requires flush
4910 * AVERROR(ENOMEM): failed to add packet to internal queue, or similar
4911 * other errors: legitimate decoding errors
4912 */
4914
4915/**
4916 * Return decoded output data from a decoder.
4917 *
4918 * @param avctx codec context
4919 * @param frame This will be set to a reference-counted video or audio
4920 * frame (depending on the decoder type) allocated by the
4921 * decoder. Note that the function will always call
4922 * av_frame_unref(frame) before doing anything else.
4923 *
4924 * @return
4925 * 0: success, a frame was returned
4926 * AVERROR(EAGAIN): output is not available in this state - user must try
4927 * to send new input
4928 * AVERROR_EOF: the decoder has been fully flushed, and there will be
4929 * no more output frames
4930 * AVERROR(EINVAL): codec not opened, or it is an encoder
4931 * AVERROR_INPUT_CHANGED: current decoded frame has changed parameters
4932 * with respect to first decoded frame. Applicable
4933 * when flag AV_CODEC_FLAG_DROPCHANGED is set.
4934 * other negative values: legitimate decoding errors
4935 */
4937
4938/**
4939 * Supply a raw video or audio frame to the encoder. Use avcodec_receive_packet()
4940 * to retrieve buffered output packets.
4941 *
4942 * @param avctx codec context
4943 * @param[in] frame AVFrame containing the raw audio or video frame to be encoded.
4944 * Ownership of the frame remains with the caller, and the
4945 * encoder will not write to the frame. The encoder may create
4946 * a reference to the frame data (or copy it if the frame is
4947 * not reference-counted).
4948 * It can be NULL, in which case it is considered a flush
4949 * packet. This signals the end of the stream. If the encoder
4950 * still has packets buffered, it will return them after this
4951 * call. Once flushing mode has been entered, additional flush
4952 * packets are ignored, and sending frames will return
4953 * AVERROR_EOF.
4954 *
4955 * For audio:
4956 * If AV_CODEC_CAP_VARIABLE_FRAME_SIZE is set, then each frame
4957 * can have any number of samples.
4958 * If it is not set, frame->nb_samples must be equal to
4959 * avctx->frame_size for all frames except the last.
4960 * The final frame may be smaller than avctx->frame_size.
4961 * @return 0 on success, otherwise negative error code:
4962 * AVERROR(EAGAIN): input is not accepted in the current state - user
4963 * must read output with avcodec_receive_packet() (once
4964 * all output is read, the packet should be resent, and
4965 * the call will not fail with EAGAIN).
4966 * AVERROR_EOF: the encoder has been flushed, and no new frames can
4967 * be sent to it
4968 * AVERROR(EINVAL): codec not opened, refcounted_frames not set, it is a
4969 * decoder, or requires flush
4970 * AVERROR(ENOMEM): failed to add packet to internal queue, or similar
4971 * other errors: legitimate decoding errors
4972 */
4974
4975/**
4976 * Read encoded data from the encoder.
4977 *
4978 * @param avctx codec context
4979 * @param avpkt This will be set to a reference-counted packet allocated by the
4980 * encoder. Note that the function will always call
4981 * av_frame_unref(frame) before doing anything else.
4982 * @return 0 on success, otherwise negative error code:
4983 * AVERROR(EAGAIN): output is not available in the current state - user
4984 * must try to send input
4985 * AVERROR_EOF: the encoder has been fully flushed, and there will be
4986 * no more output packets
4987 * AVERROR(EINVAL): codec not opened, or it is an encoder
4988 * other errors: legitimate decoding errors
4989 */
4991
4992/**
4993 * Create and return a AVHWFramesContext with values adequate for hardware
4994 * decoding. This is meant to get called from the get_format callback, and is
4995 * a helper for preparing a AVHWFramesContext for AVCodecContext.hw_frames_ctx.
4996 * This API is for decoding with certain hardware acceleration modes/APIs only.
4997 *
4998 * The returned AVHWFramesContext is not initialized. The caller must do this
4999 * with av_hwframe_ctx_init().
5000 *
5001 * Calling this function is not a requirement, but makes it simpler to avoid
5002 * codec or hardware API specific details when manually allocating frames.
5003 *
5004 * Alternatively to this, an API user can set AVCodecContext.hw_device_ctx,
5005 * which sets up AVCodecContext.hw_frames_ctx fully automatically, and makes
5006 * it unnecessary to call this function or having to care about
5007 * AVHWFramesContext initialization at all.
5008 *
5009 * There are a number of requirements for calling this function:
5010 *
5011 * - It must be called from get_format with the same avctx parameter that was
5012 * passed to get_format. Calling it outside of get_format is not allowed, and
5013 * can trigger undefined behavior.
5014 * - The function is not always supported (see description of return values).
5015 * Even if this function returns successfully, hwaccel initialization could
5016 * fail later. (The degree to which implementations check whether the stream
5017 * is actually supported varies. Some do this check only after the user's
5018 * get_format callback returns.)
5019 * - The hw_pix_fmt must be one of the choices suggested by get_format. If the
5020 * user decides to use a AVHWFramesContext prepared with this API function,
5021 * the user must return the same hw_pix_fmt from get_format.
5022 * - The device_ref passed to this function must support the given hw_pix_fmt.
5023 * - After calling this API function, it is the user's responsibility to
5024 * initialize the AVHWFramesContext (returned by the out_frames_ref parameter),
5025 * and to set AVCodecContext.hw_frames_ctx to it. If done, this must be done
5026 * before returning from get_format (this is implied by the normal
5027 * AVCodecContext.hw_frames_ctx API rules).
5028 * - The AVHWFramesContext parameters may change every time time get_format is
5029 * called. Also, AVCodecContext.hw_frames_ctx is reset before get_format. So
5030 * you are inherently required to go through this process again on every
5031 * get_format call.
5032 * - It is perfectly possible to call this function without actually using
5033 * the resulting AVHWFramesContext. One use-case might be trying to reuse a
5034 * previously initialized AVHWFramesContext, and calling this API function
5035 * only to test whether the required frame parameters have changed.
5036 * - Fields that use dynamically allocated values of any kind must not be set
5037 * by the user unless setting them is explicitly allowed by the documentation.
5038 * If the user sets AVHWFramesContext.free and AVHWFramesContext.user_opaque,
5039 * the new free callback must call the potentially set previous free callback.
5040 * This API call may set any dynamically allocated fields, including the free
5041 * callback.
5042 *
5043 * The function will set at least the following fields on AVHWFramesContext
5044 * (potentially more, depending on hwaccel API):
5045 *
5046 * - All fields set by av_hwframe_ctx_alloc().
5047 * - Set the format field to hw_pix_fmt.
5048 * - Set the sw_format field to the most suited and most versatile format. (An
5049 * implication is that this will prefer generic formats over opaque formats
5050 * with arbitrary restrictions, if possible.)
5051 * - Set the width/height fields to the coded frame size, rounded up to the
5052 * API-specific minimum alignment.
5053 * - Only _if_ the hwaccel requires a pre-allocated pool: set the initial_pool_size
5054 * field to the number of maximum reference surfaces possible with the codec,
5055 * plus 1 surface for the user to work (meaning the user can safely reference
5056 * at most 1 decoded surface at a time), plus additional buffering introduced
5057 * by frame threading. If the hwaccel does not require pre-allocation, the
5058 * field is left to 0, and the decoder will allocate new surfaces on demand
5059 * during decoding.
5060 * - Possibly AVHWFramesContext.hwctx fields, depending on the underlying
5061 * hardware API.
5062 *
5063 * Essentially, out_frames_ref returns the same as av_hwframe_ctx_alloc(), but
5064 * with basic frame parameters set.
5065 *
5066 * The function is stateless, and does not change the AVCodecContext or the
5067 * device_ref AVHWDeviceContext.
5068 *
5069 * @param avctx The context which is currently calling get_format, and which
5070 * implicitly contains all state needed for filling the returned
5071 * AVHWFramesContext properly.
5072 * @param device_ref A reference to the AVHWDeviceContext describing the device
5073 * which will be used by the hardware decoder.
5074 * @param hw_pix_fmt The hwaccel format you are going to return from get_format.
5075 * @param out_frames_ref On success, set to a reference to an _uninitialized_
5076 * AVHWFramesContext, created from the given device_ref.
5077 * Fields will be set to values required for decoding.
5078 * Not changed if an error is returned.
5079 * @return zero on success, a negative value on error. The following error codes
5080 * have special semantics:
5081 * AVERROR(ENOENT): the decoder does not support this functionality. Setup
5082 * is always manual, or it is a decoder which does not
5083 * support setting AVCodecContext.hw_frames_ctx at all,
5084 * or it is a software format.
5085 * AVERROR(EINVAL): it is known that hardware decoding is not supported for
5086 * this configuration, or the device_ref is not supported
5087 * for the hwaccel referenced by hw_pix_fmt.
5088 */
5090 AVBufferRef *device_ref,
5092 AVBufferRef **out_frames_ref);
5093
5094
5095
5096/**
5097 * @defgroup lavc_parsing Frame parsing
5098 * @{
5099 */
5100
5103 AV_PICTURE_STRUCTURE_TOP_FIELD, //< coded as top field
5104 AV_PICTURE_STRUCTURE_BOTTOM_FIELD, //< coded as bottom field
5105 AV_PICTURE_STRUCTURE_FRAME, //< coded as frame
5106};
5107
5108typedef struct AVCodecParserContext {
5111 int64_t frame_offset; /* offset of the current frame */
5112 int64_t cur_offset; /* current offset
5113 (incremented by each av_parser_parse()) */
5114 int64_t next_frame_offset; /* offset of the next frame */
5115 /* video info */
5116 int pict_type; /* XXX: Put it back in AVCodecContext. */
5117 /**
5118 * This field is used for proper frame duration computation in lavf.
5119 * It signals, how much longer the frame duration of the current frame
5120 * is compared to normal frame duration.
5121 *
5122 * frame_duration = (1 + repeat_pict) * time_base
5123 *
5124 * It is used by codecs like H.264 to display telecined material.
5125 */
5126 int repeat_pict; /* XXX: Put it back in AVCodecContext. */
5127 int64_t pts; /* pts of the current frame */
5128 int64_t dts; /* dts of the current frame */
5129
5130 /* private data */
5131 int64_t last_pts;
5132 int64_t last_dts;
5134
5135#define AV_PARSER_PTS_NB 4
5140
5142#define PARSER_FLAG_COMPLETE_FRAMES 0x0001
5143#define PARSER_FLAG_ONCE 0x0002
5144/// Set if the parser has a valid file offset
5145#define PARSER_FLAG_FETCHED_OFFSET 0x0004
5146#define PARSER_FLAG_USE_CODEC_TS 0x1000
5147
5148 int64_t offset; ///< byte offset from starting packet start
5150
5151 /**
5152 * Set by parser to 1 for key frames and 0 for non-key frames.
5153 * It is initialized to -1, so if the parser doesn't set this flag,
5154 * old-style fallback using AV_PICTURE_TYPE_I picture type as key frames
5155 * will be used.
5156 */
5158
5159#if FF_API_CONVERGENCE_DURATION
5160 /**
5161 * @deprecated unused
5162 */
5165#endif
5166
5167 // Timestamp generation support:
5168 /**
5169 * Synchronization point for start of timestamp generation.
5170 *
5171 * Set to >0 for sync point, 0 for no sync point and <0 for undefined
5172 * (default).
5173 *
5174 * For example, this corresponds to presence of H.264 buffering period
5175 * SEI message.
5176 */
5178
5179 /**
5180 * Offset of the current timestamp against last timestamp sync point in
5181 * units of AVCodecContext.time_base.
5182 *
5183 * Set to INT_MIN when dts_sync_point unused. Otherwise, it must
5184 * contain a valid timestamp offset.
5185 *
5186 * Note that the timestamp of sync point has usually a nonzero
5187 * dts_ref_dts_delta, which refers to the previous sync point. Offset of
5188 * the next frame after timestamp sync point will be usually 1.
5189 *
5190 * For example, this corresponds to H.264 cpb_removal_delay.
5191 */
5193
5194 /**
5195 * Presentation delay of current frame in units of AVCodecContext.time_base.
5196 *
5197 * Set to INT_MIN when dts_sync_point unused. Otherwise, it must
5198 * contain valid non-negative timestamp delta (presentation time of a frame
5199 * must not lie in the past).
5200 *
5201 * This delay represents the difference between decoding and presentation
5202 * time of the frame.
5203 *
5204 * For example, this corresponds to H.264 dpb_output_delay.
5205 */
5207
5208 /**
5209 * Position of the packet in file.
5210 *
5211 * Analogous to cur_frame_pts/dts
5212 */
5214
5215 /**
5216 * Byte position of currently parsed frame in stream.
5217 */
5218 int64_t pos;
5219
5220 /**
5221 * Previous frame byte position.
5222 */
5223 int64_t last_pos;
5224
5225 /**
5226 * Duration of the current frame.
5227 * For audio, this is in units of 1 / AVCodecContext.sample_rate.
5228 * For all other types, this is in units of AVCodecContext.time_base.
5229 */
5231
5233
5234 /**
5235 * Indicate whether a picture is coded as a frame, top field or bottom field.
5236 *
5237 * For example, H.264 field_pic_flag equal to 0 corresponds to
5238 * AV_PICTURE_STRUCTURE_FRAME. An H.264 picture with field_pic_flag
5239 * equal to 1 and bottom_field_flag equal to 0 corresponds to
5240 * AV_PICTURE_STRUCTURE_TOP_FIELD.
5241 */
5243
5244 /**
5245 * Picture number incremented in presentation or output order.
5246 * This field may be reinitialized at the first picture of a new sequence.
5247 *
5248 * For example, this corresponds to H.264 PicOrderCnt.
5249 */
5251
5252 /**
5253 * Dimensions of the decoded video intended for presentation.
5254 */
5257
5258 /**
5259 * Dimensions of the coded video.
5260 */
5263
5264 /**
5265 * The format of the coded data, corresponds to enum AVPixelFormat for video
5266 * and for enum AVSampleFormat for audio.
5267 *
5268 * Note that a decoder can have considerable freedom in how exactly it
5269 * decodes the data, so the format reported here might be different from the
5270 * one returned by a decoder.
5271 */
5274
5275typedef struct AVCodecParser {
5276 int codec_ids[5]; /* several codec IDs are permitted */
5279 /* This callback never returns an error, a negative value means that
5280 * the frame start was in a previous packet. */
5282 AVCodecContext *avctx,
5283 const uint8_t **poutbuf, int *poutbuf_size,
5284 const uint8_t *buf, int buf_size);
5286 int (*split)(AVCodecContext *avctx, const uint8_t *buf, int buf_size);
5289
5290/**
5291 * Iterate over all registered codec parsers.
5292 *
5293 * @param opaque a pointer where libavcodec will store the iteration state. Must
5294 * point to NULL to start the iteration.
5295 *
5296 * @return the next registered codec parser or NULL when the iteration is
5297 * finished
5298 */
5299const AVCodecParser *av_parser_iterate(void **opaque);
5300
5303
5307
5308/**
5309 * Parse a packet.
5310 *
5311 * @param s parser context.
5312 * @param avctx codec context.
5313 * @param poutbuf set to pointer to parsed buffer or NULL if not yet finished.
5314 * @param poutbuf_size set to size of parsed buffer or zero if not yet finished.
5315 * @param buf input buffer.
5316 * @param buf_size buffer size in bytes without the padding. I.e. the full buffer
5317 size is assumed to be buf_size + AV_INPUT_BUFFER_PADDING_SIZE.
5318 To signal EOF, this should be 0 (so that the last frame
5319 can be output).
5320 * @param pts input presentation timestamp.
5321 * @param dts input decoding timestamp.
5322 * @param pos input byte position in stream.
5323 * @return the number of bytes of the input bitstream used.
5324 *
5325 * Example:
5326 * @code
5327 * while(in_len){
5328 * len = av_parser_parse2(myparser, AVCodecContext, &data, &size,
5329 * in_data, in_len,
5330 * pts, dts, pos);
5331 * in_data += len;
5332 * in_len -= len;
5333 *
5334 * if(size)
5335 * decode_frame(data, size);
5336 * }
5337 * @endcode
5338 */
5340 AVCodecContext *avctx,
5341 uint8_t **poutbuf, int *poutbuf_size,
5342 const uint8_t *buf, int buf_size,
5343 int64_t pts, int64_t dts,
5344 int64_t pos);
5345
5346/**
5347 * @return 0 if the output buffer is a subset of the input, 1 if it is allocated and must be freed
5348 * @deprecated use AVBitStreamFilter
5349 */
5351 AVCodecContext *avctx,
5352 uint8_t **poutbuf, int *poutbuf_size,
5353 const uint8_t *buf, int buf_size, int keyframe);
5355
5356/**
5357 * @}
5358 * @}
5359 */
5360
5361/**
5362 * @addtogroup lavc_encoding
5363 * @{
5364 */
5365
5366/**
5367 * Find a registered encoder with a matching codec ID.
5368 *
5369 * @param id AVCodecID of the requested encoder
5370 * @return An encoder if one was found, NULL otherwise.
5371 */
5373
5374/**
5375 * Find a registered encoder with the specified name.
5376 *
5377 * @param name name of the requested encoder
5378 * @return An encoder if one was found, NULL otherwise.
5379 */
5381
5382/**
5383 * Encode a frame of audio.
5384 *
5385 * Takes input samples from frame and writes the next output packet, if
5386 * available, to avpkt. The output packet does not necessarily contain data for
5387 * the most recent frame, as encoders can delay, split, and combine input frames
5388 * internally as needed.
5389 *
5390 * @param avctx codec context
5391 * @param avpkt output AVPacket.
5392 * The user can supply an output buffer by setting
5393 * avpkt->data and avpkt->size prior to calling the
5394 * function, but if the size of the user-provided data is not
5395 * large enough, encoding will fail. If avpkt->data and
5396 * avpkt->size are set, avpkt->destruct must also be set. All
5397 * other AVPacket fields will be reset by the encoder using
5398 * av_init_packet(). If avpkt->data is NULL, the encoder will
5399 * allocate it. The encoder will set avpkt->size to the size
5400 * of the output packet.
5401 *
5402 * If this function fails or produces no output, avpkt will be
5403 * freed using av_packet_unref().
5404 * @param[in] frame AVFrame containing the raw audio data to be encoded.
5405 * May be NULL when flushing an encoder that has the
5406 * AV_CODEC_CAP_DELAY capability set.
5407 * If AV_CODEC_CAP_VARIABLE_FRAME_SIZE is set, then each frame
5408 * can have any number of samples.
5409 * If it is not set, frame->nb_samples must be equal to
5410 * avctx->frame_size for all frames except the last.
5411 * The final frame may be smaller than avctx->frame_size.
5412 * @param[out] got_packet_ptr This field is set to 1 by libavcodec if the
5413 * output packet is non-empty, and to 0 if it is
5414 * empty. If the function returns an error, the
5415 * packet can be assumed to be invalid, and the
5416 * value of got_packet_ptr is undefined and should
5417 * not be used.
5418 * @return 0 on success, negative error code on failure
5419 *
5420 * @deprecated use avcodec_send_frame()/avcodec_receive_packet() instead
5421 */
5424 const AVFrame *frame, int *got_packet_ptr);
5425
5426/**
5427 * Encode a frame of video.
5428 *
5429 * Takes input raw video data from frame and writes the next output packet, if
5430 * available, to avpkt. The output packet does not necessarily contain data for
5431 * the most recent frame, as encoders can delay and reorder input frames
5432 * internally as needed.
5433 *
5434 * @param avctx codec context
5435 * @param avpkt output AVPacket.
5436 * The user can supply an output buffer by setting
5437 * avpkt->data and avpkt->size prior to calling the
5438 * function, but if the size of the user-provided data is not
5439 * large enough, encoding will fail. All other AVPacket fields
5440 * will be reset by the encoder using av_init_packet(). If
5441 * avpkt->data is NULL, the encoder will allocate it.
5442 * The encoder will set avpkt->size to the size of the
5443 * output packet. The returned data (if any) belongs to the
5444 * caller, he is responsible for freeing it.
5445 *
5446 * If this function fails or produces no output, avpkt will be
5447 * freed using av_packet_unref().
5448 * @param[in] frame AVFrame containing the raw video data to be encoded.
5449 * May be NULL when flushing an encoder that has the
5450 * AV_CODEC_CAP_DELAY capability set.
5451 * @param[out] got_packet_ptr This field is set to 1 by libavcodec if the
5452 * output packet is non-empty, and to 0 if it is
5453 * empty. If the function returns an error, the
5454 * packet can be assumed to be invalid, and the
5455 * value of got_packet_ptr is undefined and should
5456 * not be used.
5457 * @return 0 on success, negative error code on failure
5458 *
5459 * @deprecated use avcodec_send_frame()/avcodec_receive_packet() instead
5460 */
5463 const AVFrame *frame, int *got_packet_ptr);
5464
5465int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size,
5466 const AVSubtitle *sub);
5467
5468
5469/**
5470 * @}
5471 */
5472
5473#if FF_API_AVPICTURE
5474/**
5475 * @addtogroup lavc_picture
5476 * @{
5477 */
5478
5479/**
5480 * @deprecated unused
5481 */
5484
5485/**
5486 * @deprecated unused
5487 */
5490
5491/**
5492 * @deprecated use av_image_fill_arrays() instead.
5493 */
5495int avpicture_fill(AVPicture *picture, const uint8_t *ptr,
5496 enum AVPixelFormat pix_fmt, int width, int height);
5497
5498/**
5499 * @deprecated use av_image_copy_to_buffer() instead.
5500 */
5503 int width, int height,
5504 unsigned char *dest, int dest_size);
5505
5506/**
5507 * @deprecated use av_image_get_buffer_size() instead.
5508 */
5511
5512/**
5513 * @deprecated av_image_copy() instead.
5514 */
5517 enum AVPixelFormat pix_fmt, int width, int height);
5518
5519/**
5520 * @deprecated unused
5521 */
5524 enum AVPixelFormat pix_fmt, int top_band, int left_band);
5525
5526/**
5527 * @deprecated unused
5528 */
5531 int padtop, int padbottom, int padleft, int padright, int *color);
5532
5533/**
5534 * @}
5535 */
5536#endif
5537
5538/**
5539 * @defgroup lavc_misc Utility functions
5540 * @ingroup libavc
5541 *
5542 * Miscellaneous utility functions related to both encoding and decoding
5543 * (or neither).
5544 * @{
5545 */
5546
5547/**
5548 * @defgroup lavc_misc_pixfmt Pixel formats
5549 *
5550 * Functions for working with pixel formats.
5551 * @{
5552 */
5553
5554#if FF_API_GETCHROMA
5555/**
5556 * @deprecated Use av_pix_fmt_get_chroma_sub_sample
5557 */
5558
5560void avcodec_get_chroma_sub_sample(enum AVPixelFormat pix_fmt, int *h_shift, int *v_shift);
5561#endif
5562
5563/**
5564 * Return a value representing the fourCC code associated to the
5565 * pixel format pix_fmt, or 0 if no associated fourCC code can be
5566 * found.
5567 */
5569
5570/**
5571 * @deprecated see av_get_pix_fmt_loss()
5572 */
5573int avcodec_get_pix_fmt_loss(enum AVPixelFormat dst_pix_fmt, enum AVPixelFormat src_pix_fmt,
5574 int has_alpha);
5575
5576/**
5577 * Find the best pixel format to convert to given a certain source pixel
5578 * format. When converting from one pixel format to another, information loss
5579 * may occur. For example, when converting from RGB24 to GRAY, the color
5580 * information will be lost. Similarly, other losses occur when converting from
5581 * some formats to other formats. avcodec_find_best_pix_fmt_of_2() searches which of
5582 * the given pixel formats should be used to suffer the least amount of loss.
5583 * The pixel formats from which it chooses one, are determined by the
5584 * pix_fmt_list parameter.
5585 *
5586 *
5587 * @param[in] pix_fmt_list AV_PIX_FMT_NONE terminated array of pixel formats to choose from
5588 * @param[in] src_pix_fmt source pixel format
5589 * @param[in] has_alpha Whether the source pixel format alpha channel is used.
5590 * @param[out] loss_ptr Combination of flags informing you what kind of losses will occur.
5591 * @return The best pixel format to convert to or -1 if none was found.
5592 */
5594 enum AVPixelFormat src_pix_fmt,
5595 int has_alpha, int *loss_ptr);
5596
5597/**
5598 * @deprecated see av_find_best_pix_fmt_of_2()
5599 */
5601 enum AVPixelFormat src_pix_fmt, int has_alpha, int *loss_ptr);
5602
5605 enum AVPixelFormat src_pix_fmt, int has_alpha, int *loss_ptr);
5606
5608
5609/**
5610 * @}
5611 */
5612
5613#if FF_API_TAG_STRING
5614/**
5615 * Put a string representing the codec tag codec_tag in buf.
5616 *
5617 * @param buf buffer to place codec tag in
5618 * @param buf_size size in bytes of buf
5619 * @param codec_tag codec tag to assign
5620 * @return the length of the string that would have been generated if
5621 * enough space had been available, excluding the trailing null
5622 *
5623 * @deprecated see av_fourcc_make_string() and av_fourcc2str().
5624 */
5626size_t av_get_codec_tag_string(char *buf, size_t buf_size, unsigned int codec_tag);
5627#endif
5628
5629void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode);
5630
5631/**
5632 * Return a name for the specified profile, if available.
5633 *
5634 * @param codec the codec that is searched for the given profile
5635 * @param profile the profile value for which a name is requested
5636 * @return A name for the profile if found, NULL otherwise.
5637 */
5638const char *av_get_profile_name(const AVCodec *codec, int profile);
5639
5640/**
5641 * Return a name for the specified profile, if available.
5642 *
5643 * @param codec_id the ID of the codec to which the requested profile belongs
5644 * @param profile the profile value for which a name is requested
5645 * @return A name for the profile if found, NULL otherwise.
5646 *
5647 * @note unlike av_get_profile_name(), which searches a list of profiles
5648 * supported by a specific decoder or encoder implementation, this
5649 * function searches the list of profiles from the AVCodecDescriptor
5650 */
5651const char *avcodec_profile_name(enum AVCodecID codec_id, int profile);
5652
5653int avcodec_default_execute(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2),void *arg, int *ret, int count, int size);
5654int avcodec_default_execute2(AVCodecContext *c, int (*func)(AVCodecContext *c2, void *arg2, int, int),void *arg, int *ret, int count);
5655//FIXME func typedef
5656
5657/**
5658 * Fill AVFrame audio data and linesize pointers.
5659 *
5660 * The buffer buf must be a preallocated buffer with a size big enough
5661 * to contain the specified samples amount. The filled AVFrame data
5662 * pointers will point to this buffer.
5663 *
5664 * AVFrame extended_data channel pointers are allocated if necessary for
5665 * planar audio.
5666 *
5667 * @param frame the AVFrame
5668 * frame->nb_samples must be set prior to calling the
5669 * function. This function fills in frame->data,
5670 * frame->extended_data, frame->linesize[0].
5671 * @param nb_channels channel count
5672 * @param sample_fmt sample format
5673 * @param buf buffer to use for frame data
5674 * @param buf_size size of buffer
5675 * @param align plane size sample alignment (0 = default)
5676 * @return >=0 on success, negative error code on failure
5677 * @todo return the size in bytes required to store the samples in
5678 * case of success, at the next libavutil bump
5679 */
5681 enum AVSampleFormat sample_fmt, const uint8_t *buf,
5682 int buf_size, int align);
5683
5684/**
5685 * Reset the internal decoder state / flush internal buffers. Should be called
5686 * e.g. when seeking or when switching to a different stream.
5687 *
5688 * @note when refcounted frames are not used (i.e. avctx->refcounted_frames is 0),
5689 * this invalidates the frames previously returned from the decoder. When
5690 * refcounted frames are used, the decoder just releases any references it might
5691 * keep internally, but the caller's reference remains valid.
5692 */
5694
5695/**
5696 * Return codec bits per sample.
5697 *
5698 * @param[in] codec_id the codec
5699 * @return Number of bits per sample or zero if unknown for the given codec.
5700 */
5702
5703/**
5704 * Return the PCM codec associated with a sample format.
5705 * @param be endianness, 0 for little, 1 for big,
5706 * -1 (or anything else) for native
5707 * @return AV_CODEC_ID_PCM_* or AV_CODEC_ID_NONE
5708 */
5710
5711/**
5712 * Return codec bits per sample.
5713 * Only return non-zero if the bits per sample is exactly correct, not an
5714 * approximation.
5715 *
5716 * @param[in] codec_id the codec
5717 * @return Number of bits per sample or zero if unknown for the given codec.
5718 */
5720
5721/**
5722 * Return audio frame duration.
5723 *
5724 * @param avctx codec context
5725 * @param frame_bytes size of the frame, or 0 if unknown
5726 * @return frame duration, in samples, if known. 0 if not able to
5727 * determine.
5728 */
5729int av_get_audio_frame_duration(AVCodecContext *avctx, int frame_bytes);
5730
5731/**
5732 * This function is the same as av_get_audio_frame_duration(), except it works
5733 * with AVCodecParameters instead of an AVCodecContext.
5734 */
5736
5737#if FF_API_OLD_BSF
5743 /**
5744 * Internal default arguments, used if NULL is passed to av_bitstream_filter_filter().
5745 * Not for access by library users.
5746 */
5747 char *args;
5749#endif
5750
5752
5753/**
5754 * The bitstream filter state.
5755 *
5756 * This struct must be allocated with av_bsf_alloc() and freed with
5757 * av_bsf_free().
5758 *
5759 * The fields in the struct will only be changed (by the caller or by the
5760 * filter) as described in their documentation, and are to be considered
5761 * immutable otherwise.
5762 */
5763typedef struct AVBSFContext {
5764 /**
5765 * A class for logging and AVOptions
5766 */
5768
5769 /**
5770 * The bitstream filter this context is an instance of.
5771 */
5773
5774 /**
5775 * Opaque libavcodec internal data. Must not be touched by the caller in any
5776 * way.
5777 */
5779
5780 /**
5781 * Opaque filter-specific private data. If filter->priv_class is non-NULL,
5782 * this is an AVOptions-enabled struct.
5783 */
5785
5786 /**
5787 * Parameters of the input stream. This field is allocated in
5788 * av_bsf_alloc(), it needs to be filled by the caller before
5789 * av_bsf_init().
5790 */
5792
5793 /**
5794 * Parameters of the output stream. This field is allocated in
5795 * av_bsf_alloc(), it is set by the filter in av_bsf_init().
5796 */
5798
5799 /**
5800 * The timebase used for the timestamps of the input packets. Set by the
5801 * caller before av_bsf_init().
5802 */
5804
5805 /**
5806 * The timebase used for the timestamps of the output packets. Set by the
5807 * filter in av_bsf_init().
5808 */
5810} AVBSFContext;
5811
5812typedef struct AVBitStreamFilter {
5813 const char *name;
5814
5815 /**
5816 * A list of codec ids supported by the filter, terminated by
5817 * AV_CODEC_ID_NONE.
5818 * May be NULL, in that case the bitstream filter works with any codec id.
5819 */
5821
5822 /**
5823 * A class for the private data, used to declare bitstream filter private
5824 * AVOptions. This field is NULL for bitstream filters that do not declare
5825 * any options.
5826 *
5827 * If this field is non-NULL, the first member of the filter private data
5828 * must be a pointer to AVClass, which will be set by libavcodec generic
5829 * code to this class.
5830 */
5832
5833 /*****************************************************************
5834 * No fields below this line are part of the public API. They
5835 * may not be used outside of libavcodec and can be changed and
5836 * removed at will.
5837 * New public fields should be added right above.
5838 *****************************************************************
5839 */
5840
5842 int (*init)(AVBSFContext *ctx);
5844 void (*close)(AVBSFContext *ctx);
5845 void (*flush)(AVBSFContext *ctx);
5847
5848#if FF_API_OLD_BSF
5849/**
5850 * @deprecated the old bitstream filtering API (using AVBitStreamFilterContext)
5851 * is deprecated. Use the new bitstream filtering API (using AVBSFContext).
5852 */
5855/**
5856 * @deprecated the old bitstream filtering API (using AVBitStreamFilterContext)
5857 * is deprecated. Use av_bsf_get_by_name(), av_bsf_alloc(), and av_bsf_init()
5858 * from the new bitstream filtering API (using AVBSFContext).
5859 */
5862/**
5863 * @deprecated the old bitstream filtering API (using AVBitStreamFilterContext)
5864 * is deprecated. Use av_bsf_send_packet() and av_bsf_receive_packet() from the
5865 * new bitstream filtering API (using AVBSFContext).
5866 */
5869 AVCodecContext *avctx, const char *args,
5870 uint8_t **poutbuf, int *poutbuf_size,
5871 const uint8_t *buf, int buf_size, int keyframe);
5872/**
5873 * @deprecated the old bitstream filtering API (using AVBitStreamFilterContext)
5874 * is deprecated. Use av_bsf_free() from the new bitstream filtering API (using
5875 * AVBSFContext).
5876 */
5879/**
5880 * @deprecated the old bitstream filtering API (using AVBitStreamFilterContext)
5881 * is deprecated. Use av_bsf_iterate() from the new bitstream filtering API (using
5882 * AVBSFContext).
5883 */
5886#endif
5887
5888/**
5889 * @return a bitstream filter with the specified name or NULL if no such
5890 * bitstream filter exists.
5891 */
5892const AVBitStreamFilter *av_bsf_get_by_name(const char *name);
5893
5894/**
5895 * Iterate over all registered bitstream filters.
5896 *
5897 * @param opaque a pointer where libavcodec will store the iteration state. Must
5898 * point to NULL to start the iteration.
5899 *
5900 * @return the next registered bitstream filter or NULL when the iteration is
5901 * finished
5902 */
5903const AVBitStreamFilter *av_bsf_iterate(void **opaque);
5904#if FF_API_NEXT
5906const AVBitStreamFilter *av_bsf_next(void **opaque);
5907#endif
5908
5909/**
5910 * Allocate a context for a given bitstream filter. The caller must fill in the
5911 * context parameters as described in the documentation and then call
5912 * av_bsf_init() before sending any data to the filter.
5913 *
5914 * @param filter the filter for which to allocate an instance.
5915 * @param ctx a pointer into which the pointer to the newly-allocated context
5916 * will be written. It must be freed with av_bsf_free() after the
5917 * filtering is done.
5918 *
5919 * @return 0 on success, a negative AVERROR code on failure
5920 */
5922
5923/**
5924 * Prepare the filter for use, after all the parameters and options have been
5925 * set.
5926 */
5928
5929/**
5930 * Submit a packet for filtering.
5931 *
5932 * After sending each packet, the filter must be completely drained by calling
5933 * av_bsf_receive_packet() repeatedly until it returns AVERROR(EAGAIN) or
5934 * AVERROR_EOF.
5935 *
5936 * @param pkt the packet to filter. The bitstream filter will take ownership of
5937 * the packet and reset the contents of pkt. pkt is not touched if an error occurs.
5938 * This parameter may be NULL, which signals the end of the stream (i.e. no more
5939 * packets will be sent). That will cause the filter to output any packets it
5940 * may have buffered internally.
5941 *
5942 * @return 0 on success, a negative AVERROR on error.
5943 */
5945
5946/**
5947 * Retrieve a filtered packet.
5948 *
5949 * @param[out] pkt this struct will be filled with the contents of the filtered
5950 * packet. It is owned by the caller and must be freed using
5951 * av_packet_unref() when it is no longer needed.
5952 * This parameter should be "clean" (i.e. freshly allocated
5953 * with av_packet_alloc() or unreffed with av_packet_unref())
5954 * when this function is called. If this function returns
5955 * successfully, the contents of pkt will be completely
5956 * overwritten by the returned data. On failure, pkt is not
5957 * touched.
5958 *
5959 * @return 0 on success. AVERROR(EAGAIN) if more packets need to be sent to the
5960 * filter (using av_bsf_send_packet()) to get more output. AVERROR_EOF if there
5961 * will be no further output from the filter. Another negative AVERROR value if
5962 * an error occurs.
5963 *
5964 * @note one input packet may result in several output packets, so after sending
5965 * a packet with av_bsf_send_packet(), this function needs to be called
5966 * repeatedly until it stops returning 0. It is also possible for a filter to
5967 * output fewer packets than were sent to it, so this function may return
5968 * AVERROR(EAGAIN) immediately after a successful av_bsf_send_packet() call.
5969 */
5971
5972/**
5973 * Reset the internal bitstream filter state / flush internal buffers.
5974 */
5976
5977/**
5978 * Free a bitstream filter context and everything associated with it; write NULL
5979 * into the supplied pointer.
5980 */
5982
5983/**
5984 * Get the AVClass for AVBSFContext. It can be used in combination with
5985 * AV_OPT_SEARCH_FAKE_OBJ for examining options.
5986 *
5987 * @see av_opt_find().
5988 */
5990
5991/**
5992 * Structure for chain/list of bitstream filters.
5993 * Empty list can be allocated by av_bsf_list_alloc().
5994 */
5995typedef struct AVBSFList AVBSFList;
5996
5997/**
5998 * Allocate empty list of bitstream filters.
5999 * The list must be later freed by av_bsf_list_free()
6000 * or finalized by av_bsf_list_finalize().
6001 *
6002 * @return Pointer to @ref AVBSFList on success, NULL in case of failure
6003 */
6005
6006/**
6007 * Free list of bitstream filters.
6008 *
6009 * @param lst Pointer to pointer returned by av_bsf_list_alloc()
6010 */
6012
6013/**
6014 * Append bitstream filter to the list of bitstream filters.
6015 *
6016 * @param lst List to append to
6017 * @param bsf Filter context to be appended
6018 *
6019 * @return >=0 on success, negative AVERROR in case of failure
6020 */
6022
6023/**
6024 * Construct new bitstream filter context given it's name and options
6025 * and append it to the list of bitstream filters.
6026 *
6027 * @param lst List to append to
6028 * @param bsf_name Name of the bitstream filter
6029 * @param options Options for the bitstream filter, can be set to NULL
6030 *
6031 * @return >=0 on success, negative AVERROR in case of failure
6032 */
6033int av_bsf_list_append2(AVBSFList *lst, const char * bsf_name, AVDictionary **options);
6034/**
6035 * Finalize list of bitstream filters.
6036 *
6037 * This function will transform @ref AVBSFList to single @ref AVBSFContext,
6038 * so the whole chain of bitstream filters can be treated as single filter
6039 * freshly allocated by av_bsf_alloc().
6040 * If the call is successful, @ref AVBSFList structure is freed and lst
6041 * will be set to NULL. In case of failure, caller is responsible for
6042 * freeing the structure by av_bsf_list_free()
6043 *
6044 * @param lst Filter list structure to be transformed
6045 * @param[out] bsf Pointer to be set to newly created @ref AVBSFContext structure
6046 * representing the chain of bitstream filters
6047 *
6048 * @return >=0 on success, negative AVERROR in case of failure
6049 */
6051
6052/**
6053 * Parse string describing list of bitstream filters and create single
6054 * @ref AVBSFContext describing the whole chain of bitstream filters.
6055 * Resulting @ref AVBSFContext can be treated as any other @ref AVBSFContext freshly
6056 * allocated by av_bsf_alloc().
6057 *
6058 * @param str String describing chain of bitstream filters in format
6059 * `bsf1[=opt1=val1:opt2=val2][,bsf2]`
6060 * @param[out] bsf Pointer to be set to newly created @ref AVBSFContext structure
6061 * representing the chain of bitstream filters
6062 *
6063 * @return >=0 on success, negative AVERROR in case of failure
6064 */
6065int av_bsf_list_parse_str(const char *str, AVBSFContext **bsf);
6066
6067/**
6068 * Get null/pass-through bitstream filter.
6069 *
6070 * @param[out] bsf Pointer to be set to new instance of pass-through bitstream filter
6071 *
6072 * @return
6073 */
6075
6076/* memory */
6077
6078/**
6079 * Same behaviour av_fast_malloc but the buffer has additional
6080 * AV_INPUT_BUFFER_PADDING_SIZE at the end which will always be 0.
6081 *
6082 * In addition the whole buffer will initially and after resizes
6083 * be 0-initialized so that no uninitialized data will ever appear.
6084 */
6085void av_fast_padded_malloc(void *ptr, unsigned int *size, size_t min_size);
6086
6087/**
6088 * Same behaviour av_fast_padded_malloc except that buffer will always
6089 * be 0-initialized after call.
6090 */
6091void av_fast_padded_mallocz(void *ptr, unsigned int *size, size_t min_size);
6092
6093/**
6094 * Encode extradata length to a buffer. Used by xiph codecs.
6095 *
6096 * @param s buffer to write to; must be at least (v/255+1) bytes long
6097 * @param v size of extradata in bytes
6098 * @return number of bytes written to the buffer.
6099 */
6100unsigned int av_xiphlacing(unsigned char *s, unsigned int v);
6101
6102#if FF_API_USER_VISIBLE_AVHWACCEL
6103/**
6104 * Register the hardware accelerator hwaccel.
6105 *
6106 * @deprecated This function doesn't do anything.
6107 */
6110
6111/**
6112 * If hwaccel is NULL, returns the first registered hardware accelerator,
6113 * if hwaccel is non-NULL, returns the next registered hardware accelerator
6114 * after hwaccel, or NULL if hwaccel is the last one.
6115 *
6116 * @deprecated AVHWaccel structures contain no user-serviceable parts, so
6117 * this function should not be used.
6118 */
6121#endif
6122
6123#if FF_API_LOCKMGR
6124/**
6125 * Lock operation used by lockmgr
6126 *
6127 * @deprecated Deprecated together with av_lockmgr_register().
6128 */
6130 AV_LOCK_CREATE, ///< Create a mutex
6131 AV_LOCK_OBTAIN, ///< Lock the mutex
6132 AV_LOCK_RELEASE, ///< Unlock the mutex
6133 AV_LOCK_DESTROY, ///< Free mutex resources
6134};
6135
6136/**
6137 * Register a user provided lock manager supporting the operations
6138 * specified by AVLockOp. The "mutex" argument to the function points
6139 * to a (void *) where the lockmgr should store/get a pointer to a user
6140 * allocated mutex. It is NULL upon AV_LOCK_CREATE and equal to the
6141 * value left by the last call for all other ops. If the lock manager is
6142 * unable to perform the op then it should leave the mutex in the same
6143 * state as when it was called and return a non-zero value. However,
6144 * when called with AV_LOCK_DESTROY the mutex will always be assumed to
6145 * have been successfully destroyed. If av_lockmgr_register succeeds
6146 * it will return a non-negative value, if it fails it will return a
6147 * negative value and destroy all mutex and unregister all callbacks.
6148 * av_lockmgr_register is not thread-safe, it must be called from a
6149 * single thread before any calls which make use of locking are used.
6150 *
6151 * @param cb User defined callback. av_lockmgr_register invokes calls
6152 * to this callback and the previously registered callback.
6153 * The callback will be used to create more than one mutex
6154 * each of which must be backed by its own underlying locking
6155 * mechanism (i.e. do not use a single static object to
6156 * implement your lock manager). If cb is set to NULL the
6157 * lockmgr will be unregistered.
6158 *
6159 * @deprecated This function does nothing, and always returns 0. Be sure to
6160 * build with thread support to get basic thread safety.
6161 */
6163int av_lockmgr_register(int (*cb)(void **mutex, enum AVLockOp op));
6164#endif
6165
6166/**
6167 * Get the type of the given codec.
6168 */
6170
6171/**
6172 * Get the name of a codec.
6173 * @return a static string identifying the codec; never NULL
6174 */
6175const char *avcodec_get_name(enum AVCodecID id);
6176
6177/**
6178 * @return a positive value if s is open (i.e. avcodec_open2() was called on it
6179 * with no corresponding avcodec_close()), 0 otherwise.
6180 */
6182
6183/**
6184 * @return a non-zero number if codec is an encoder, zero otherwise
6185 */
6187
6188/**
6189 * @return a non-zero number if codec is a decoder, zero otherwise
6190 */
6192
6193/**
6194 * @return descriptor for given codec ID or NULL if no descriptor exists.
6195 */
6197
6198/**
6199 * Iterate over all codec descriptors known to libavcodec.
6200 *
6201 * @param prev previous descriptor. NULL to get the first descriptor.
6202 *
6203 * @return next descriptor or NULL after the last descriptor
6204 */
6206
6207/**
6208 * @return codec descriptor with the given name or NULL if no such descriptor
6209 * exists.
6210 */
6212
6213/**
6214 * Allocate a CPB properties structure and initialize its fields to default
6215 * values.
6216 *
6217 * @param size if non-NULL, the size of the allocated struct will be written
6218 * here. This is useful for embedding it in side data.
6219 *
6220 * @return the newly allocated struct or NULL on failure
6221 */
6223
6224/**
6225 * @}
6226 */
6227
6228#endif /* AVCODEC_AVCODEC_H */
Macro definitions for various function/variable attributes.
#define attribute_deprecated
Definition: attributes.h:94
#define AV_PARSER_PTS_NB
Definition: avcodec.h:5135
Convenience header that includes libavutil's core.
refcounted data buffer API
audio channel layout utility functions
static int width
static AVPacket pkt
static enum AVPixelFormat pix_fmt
static int height
static AVFrame * frame
Public dictionary API.
static void encode(AVCodecContext *ctx, AVFrame *frame, AVPacket *pkt, FILE *output)
Definition: encode_audio.c:95
reference-counted frame API
#define AV_NUM_DATA_POINTERS
Definition: frame.h:296
int avcodec_parameters_from_context(AVCodecParameters *par, const AVCodecContext *codec)
Fill the parameters struct based on the values from the supplied codec context.
int avcodec_open2(AVCodecContext *avctx, const AVCodec *codec, AVDictionary **options)
Initialize the AVCodecContext to use the given AVCodec.
attribute_deprecated void av_codec_set_pkt_timebase(AVCodecContext *avctx, AVRational val)
int avcodec_get_context_defaults3(AVCodecContext *s, const AVCodec *codec)
const AVClass * avcodec_get_class(void)
Get the AVClass for AVCodecContext.
struct AVCodecDefault AVCodecDefault
Definition: avcodec.h:3474
const AVClass * avcodec_get_subtitle_rect_class(void)
Get the AVClass for AVSubtitleRect.
attribute_deprecated uint16_t * av_codec_get_chroma_intra_matrix(const AVCodecContext *avctx)
AVCodecContext * avcodec_alloc_context3(const AVCodec *codec)
Allocate an AVCodecContext and set its fields to default values.
attribute_deprecated AVRational av_codec_get_pkt_timebase(const AVCodecContext *avctx)
Accessors for some AVCodecContext fields.
attribute_deprecated AVCodec * av_codec_next(const AVCodec *c)
If c is NULL, returns the first registered codec, if c is non-NULL, returns the next registered codec...
AVCodecParameters * avcodec_parameters_alloc(void)
Allocate a new AVCodecParameters and set its fields to default values (unknown/invalid/0).
attribute_deprecated void av_codec_set_codec_descriptor(AVCodecContext *avctx, const AVCodecDescriptor *desc)
int avcodec_parameters_copy(AVCodecParameters *dst, const AVCodecParameters *src)
Copy the contents of src to dst.
attribute_deprecated void avcodec_register(AVCodec *codec)
Register the codec codec and initialize libavcodec.
attribute_deprecated void av_codec_set_chroma_intra_matrix(AVCodecContext *avctx, uint16_t *val)
AVSubtitleType
Definition: avcodec.h:3878
void avcodec_parameters_free(AVCodecParameters **par)
Free an AVCodecParameters instance and everything associated with it and write NULL to the supplied p...
AVFieldOrder
Definition: avcodec.h:1543
attribute_deprecated int av_codec_get_lowres(const AVCodecContext *avctx)
void avsubtitle_free(AVSubtitle *sub)
Free all allocated data in the given subtitle struct.
attribute_deprecated void av_codec_set_lowres(AVCodecContext *avctx, int val)
AVCodecID
Identify the syntax and semantics of the bitstream.
Definition: avcodec.h:215
attribute_deprecated const AVCodecDescriptor * av_codec_get_codec_descriptor(const AVCodecContext *avctx)
const AVCodecHWConfig * avcodec_get_hw_config(const AVCodec *codec, int index)
Retrieve supported hardware configurations for a codec.
attribute_deprecated unsigned av_codec_get_codec_properties(const AVCodecContext *avctx)
const char * avcodec_license(void)
Return the libavcodec license.
const AVClass * avcodec_get_frame_class(void)
Get the AVClass for AVFrame.
int avcodec_parameters_to_context(AVCodecContext *codec, const AVCodecParameters *par)
Fill the codec context based on the values from the supplied codec parameters.
attribute_deprecated int av_codec_get_seek_preroll(const AVCodecContext *avctx)
attribute_deprecated void av_codec_set_seek_preroll(AVCodecContext *avctx, int val)
AVAudioServiceType
Definition: avcodec.h:814
unsigned avcodec_version(void)
Return the LIBAVCODEC_VERSION_INT constant.
attribute_deprecated int avcodec_copy_context(AVCodecContext *dest, const AVCodecContext *src)
Copy the settings of the source AVCodecContext into the destination AVCodecContext.
const AVCodec * av_codec_iterate(void **opaque)
Iterate over all registered codecs.
attribute_deprecated int av_codec_get_max_lowres(const AVCodec *codec)
const char * avcodec_configuration(void)
Return the libavcodec build-time configuration.
attribute_deprecated void avcodec_register_all(void)
Register all the codecs, parsers and bitstream filters which were enabled at configuration time.
int avcodec_close(AVCodecContext *avctx)
Close a given AVCodecContext and free all the data associated with it (but not the AVCodecContext its...
void avcodec_free_context(AVCodecContext **avctx)
Free the codec context and everything associated with it and write NULL to the provided pointer.
@ SUBTITLE_BITMAP
A bitmap, pict will be set.
Definition: avcodec.h:3881
@ SUBTITLE_ASS
Formatted text, the ass field must be set by the decoder and is authoritative.
Definition: avcodec.h:3893
@ SUBTITLE_TEXT
Plain text, the text field must be set by the decoder and is authoritative.
Definition: avcodec.h:3887
@ SUBTITLE_NONE
Definition: avcodec.h:3879
@ AV_FIELD_TT
Definition: avcodec.h:1546
@ AV_FIELD_BB
Definition: avcodec.h:1547
@ AV_FIELD_UNKNOWN
Definition: avcodec.h:1544
@ AV_FIELD_PROGRESSIVE
Definition: avcodec.h:1545
@ AV_FIELD_BT
Definition: avcodec.h:1549
@ AV_FIELD_TB
Definition: avcodec.h:1548
@ AV_CODEC_ID_PCM_F24LE
Definition: avcodec.h:498
@ AV_CODEC_ID_DIRAC
Definition: avcodec.h:334
@ AV_CODEC_ID_FIRST_SUBTITLE
A dummy ID pointing at the start of subtitle codecs.
Definition: avcodec.h:657
@ AV_CODEC_ID_RSCC
Definition: avcodec.h:411
@ AV_CODEC_ID_PCM_F32LE
Definition: avcodec.h:484
@ AV_CODEC_ID_G723_1
Definition: avcodec.h:616
@ AV_CODEC_ID_FFVHUFF
Definition: avcodec.h:285
@ AV_CODEC_ID_DFA
Definition: avcodec.h:368
@ AV_CODEC_ID_DAALA
Definition: avcodec.h:429
@ AV_CODEC_ID_MPEG2TS
FAKE codec to indicate a raw MPEG-2 TS stream (only used by libavformat)
Definition: avcodec.h:703
@ AV_CODEC_ID_PCM_S24BE
Definition: avcodec.h:476
@ AV_CODEC_ID_IFF_ILBM
Definition: avcodec.h:354
@ AV_CODEC_ID_ADPCM_SWF
Definition: avcodec.h:515
@ AV_CODEC_ID_IDCIN
Definition: avcodec.h:265
@ AV_CODEC_ID_XAN_WC3
Definition: avcodec.h:258
@ AV_CODEC_ID_MSMPEG4V1
Definition: avcodec.h:232
@ AV_CODEC_ID_MUSEPACK7
Definition: avcodec.h:592
@ AV_CODEC_ID_SHORTEN
Definition: avcodec.h:579
@ AV_CODEC_ID_ESCAPE124
Definition: avcodec.h:333
@ AV_CODEC_ID_BMV_VIDEO
Definition: avcodec.h:372
@ AV_CODEC_ID_CYUV
Definition: avcodec.h:244
@ AV_CODEC_ID_ATRAC1
Definition: avcodec.h:610
@ AV_CODEC_ID_YOP
Definition: avcodec.h:357
@ AV_CODEC_ID_AGM
Definition: avcodec.h:457
@ AV_CODEC_ID_AURA2
Definition: avcodec.h:342
@ AV_CODEC_ID_INTERPLAY_ACM
Definition: avcodec.h:643
@ AV_CODEC_ID_TRUEMOTION2RT
Definition: avcodec.h:431
@ AV_CODEC_ID_8BPS
Definition: avcodec.h:266
@ AV_CODEC_ID_BETHSOFTVID
Definition: avcodec.h:321
@ AV_CODEC_ID_PAF_VIDEO
Definition: avcodec.h:397
@ AV_CODEC_ID_LSCR
Definition: avcodec.h:458
@ AV_CODEC_ID_VP6
Definition: avcodec.h:309
@ AV_CODEC_ID_VORBIS
Definition: avcodec.h:569
@ AV_CODEC_ID_MSA1
Definition: avcodec.h:381
@ AV_CODEC_ID_VP3
Definition: avcodec.h:247
@ AV_CODEC_ID_V210
Definition: avcodec.h:345
@ AV_CODEC_ID_H261
Definition: avcodec.h:221
@ AV_CODEC_ID_YUV4
Definition: avcodec.h:422
@ AV_CODEC_ID_PCM_S64BE
Definition: avcodec.h:496
@ AV_CODEC_ID_TIMED_ID3
Definition: avcodec.h:697
@ AV_CODEC_ID_CMV
Definition: avcodec.h:336
@ AV_CODEC_ID_FLV1
Definition: avcodec.h:239
@ AV_CODEC_ID_PNG
Definition: avcodec.h:279
@ AV_CODEC_ID_HDMV_PGS_SUBTITLE
Definition: avcodec.h:664
@ AV_CODEC_ID_VP6F
Definition: avcodec.h:310
@ AV_CODEC_ID_EAC3
Definition: avcodec.h:604
@ AV_CODEC_ID_IAC
Definition: avcodec.h:622
@ AV_CODEC_ID_Y41P
Definition: avcodec.h:414
@ AV_CODEC_ID_XPM
Definition: avcodec.h:442
@ AV_CODEC_ID_MPL2
Definition: avcodec.h:678
@ AV_CODEC_ID_ADPCM_CT
Definition: avcodec.h:514
@ AV_CODEC_ID_INDEO5
Definition: avcodec.h:330
@ AV_CODEC_ID_DVB_SUBTITLE
Definition: avcodec.h:659
@ AV_CODEC_ID_S302M
Definition: avcodec.h:489
@ AV_CODEC_ID_G729
Definition: avcodec.h:617
@ AV_CODEC_ID_ADPCM_IMA_WS
Definition: avcodec.h:506
@ AV_CODEC_ID_RAWVIDEO
Definition: avcodec.h:231
@ AV_CODEC_ID_PCM_S16BE_PLANAR
Definition: avcodec.h:493
@ AV_CODEC_ID_ADPCM_EA_R1
Definition: avcodec.h:522
@ AV_CODEC_ID_DSD_LSBF
Definition: avcodec.h:638
@ AV_CODEC_ID_PCM_U8
Definition: avcodec.h:468
@ AV_CODEC_ID_ADPCM_4XM
Definition: avcodec.h:509
@ AV_CODEC_ID_SMACKVIDEO
Definition: avcodec.h:301
@ AV_CODEC_ID_YLC
Definition: avcodec.h:435
@ AV_CODEC_ID_APNG
Definition: avcodec.h:428
@ AV_CODEC_ID_ADPCM_IMA_OKI
Definition: avcodec.h:535
@ AV_CODEC_ID_ADPCM_IMA_EA_EACS
Definition: avcodec.h:526
@ AV_CODEC_ID_HUFFYUV
Definition: avcodec.h:243
@ AV_CODEC_ID_PSD
Definition: avcodec.h:436
@ AV_CODEC_ID_QTRLE
Definition: avcodec.h:273
@ AV_CODEC_ID_R210
Definition: avcodec.h:351
@ AV_CODEC_ID_INDEO4
Definition: avcodec.h:329
@ AV_CODEC_ID_SNOW
Definition: avcodec.h:426
@ AV_CODEC_ID_VMDAUDIO
Definition: avcodec.h:575
@ AV_CODEC_ID_PCM_DVD
Definition: avcodec.h:482
@ AV_CODEC_ID_MOTIONPIXELS
Definition: avcodec.h:337
@ AV_CODEC_ID_CLLC
Definition: avcodec.h:384
@ AV_CODEC_ID_PJS
Definition: avcodec.h:680
@ AV_CODEC_ID_V408
Definition: avcodec.h:421
@ AV_CODEC_ID_TGV
Definition: avcodec.h:338
@ AV_CODEC_ID_SAMI
Definition: avcodec.h:671
@ AV_CODEC_ID_DSICINVIDEO
Definition: avcodec.h:312
@ AV_CODEC_ID_PCM_S16LE
Definition: avcodec.h:463
@ AV_CODEC_ID_4GV
Definition: avcodec.h:642
@ AV_CODEC_ID_JACOSUB
Definition: avcodec.h:670
@ AV_CODEC_ID_PCM_S32LE_PLANAR
Definition: avcodec.h:492
@ AV_CODEC_ID_XMA1
Definition: avcodec.h:644
@ AV_CODEC_ID_WCMV
Definition: avcodec.h:453
@ AV_CODEC_ID_FFWAVESYNTH
Definition: avcodec.h:633
@ AV_CODEC_ID_PTX
Definition: avcodec.h:322
@ AV_CODEC_ID_GSM
as in Berlin toast format
Definition: avcodec.h:582
@ AV_CODEC_ID_PCM_F16LE
Definition: avcodec.h:497
@ AV_CODEC_ID_8SVX_EXP
Definition: avcodec.h:618
@ AV_CODEC_ID_DVD_SUBTITLE
Definition: avcodec.h:658
@ AV_CODEC_ID_TTML
Definition: avcodec.h:683
@ AV_CODEC_ID_ARBC
Definition: avcodec.h:456
@ AV_CODEC_ID_CELT
Definition: avcodec.h:615
@ AV_CODEC_ID_PCM_F32BE
Definition: avcodec.h:483
@ AV_CODEC_ID_RPZA
Definition: avcodec.h:260
@ AV_CODEC_ID_PROBE
codec_id is not known (like AV_CODEC_ID_NONE) but lavf should attempt to identify it
Definition: avcodec.h:701
@ AV_CODEC_ID_AURA
Definition: avcodec.h:341
@ AV_CODEC_ID_ADPCM_SBPRO_2
Definition: avcodec.h:519
@ AV_CODEC_ID_ADPCM_G722
Definition: avcodec.h:530
@ AV_CODEC_ID_PICTOR
Definition: avcodec.h:359
@ AV_CODEC_ID_DSD_MSBF_PLANAR
Definition: avcodec.h:641
@ AV_CODEC_ID_MP4ALS
Definition: avcodec.h:609
@ AV_CODEC_ID_XSUB
Definition: avcodec.h:661
@ AV_CODEC_ID_PCM_BLURAY
Definition: avcodec.h:487
@ AV_CODEC_ID_PIXLET
Definition: avcodec.h:437
@ AV_CODEC_ID_WS_VQA
Definition: avcodec.h:262
@ AV_CODEC_ID_UTVIDEO
Definition: avcodec.h:371
@ AV_CODEC_ID_ADPCM_DTK
Definition: avcodec.h:536
@ AV_CODEC_ID_PROSUMER
Definition: avcodec.h:451
@ AV_CODEC_ID_RASC
Definition: avcodec.h:454
@ AV_CODEC_ID_GIF
Definition: avcodec.h:315
@ AV_CODEC_ID_SVQ3
Definition: avcodec.h:241
@ AV_CODEC_ID_XAN_WC4
Definition: avcodec.h:259
@ AV_CODEC_ID_DOLBY_E
Definition: avcodec.h:649
@ AV_CODEC_ID_CLEARVIDEO
Definition: avcodec.h:441
@ AV_CODEC_ID_VIXL
Definition: avcodec.h:277
@ AV_CODEC_ID_SRT
Definition: avcodec.h:666
@ AV_CODEC_ID_SIPR
Definition: avcodec.h:605
@ AV_CODEC_ID_XMA2
Definition: avcodec.h:645
@ AV_CODEC_ID_WMAVOICE
Definition: avcodec.h:600
@ AV_CODEC_ID_TEXT
raw UTF-8 text
Definition: avcodec.h:660
@ AV_CODEC_ID_V410
Definition: avcodec.h:375
@ AV_CODEC_ID_M101
Definition: avcodec.h:432
@ AV_CODEC_ID_H264
Definition: avcodec.h:245
@ AV_CODEC_ID_WRAPPED_AVFRAME
Passthrough codec, AVFrames wrapped in AVPacket.
Definition: avcodec.h:708
@ AV_CODEC_ID_SMV
Definition: avcodec.h:637
@ AV_CODEC_ID_AIC
Definition: avcodec.h:387
@ AV_CODEC_ID_VP7
Definition: avcodec.h:399
@ AV_CODEC_ID_APE
Definition: avcodec.h:596
@ AV_CODEC_ID_AVRP
Definition: avcodec.h:415
@ AV_CODEC_ID_SBC
Definition: avcodec.h:652
@ AV_CODEC_ID_CFHD
Definition: avcodec.h:430
@ AV_CODEC_ID_ADPCM_IMA_EA_SEAD
Definition: avcodec.h:525
@ AV_CODEC_ID_APTX
Definition: avcodec.h:650
@ AV_CODEC_ID_SMPTE_KLV
Definition: avcodec.h:695
@ AV_CODEC_ID_STL
Definition: avcodec.h:673
@ AV_CODEC_ID_TARGA
Definition: avcodec.h:311
@ AV_CODEC_ID_PGM
Definition: avcodec.h:282
@ AV_CODEC_ID_NONE
Definition: avcodec.h:216
@ AV_CODEC_ID_DSD_LSBF_PLANAR
Definition: avcodec.h:640
@ AV_CODEC_ID_EVRC
Definition: avcodec.h:636
@ AV_CODEC_ID_MSRLE
Definition: avcodec.h:263
@ AV_CODEC_ID_VB
Definition: avcodec.h:326
@ AV_CODEC_ID_FRWU
Definition: avcodec.h:348
@ AV_CODEC_ID_AVS
Definition: avcodec.h:300
@ AV_CODEC_ID_MAD
Definition: avcodec.h:347
@ AV_CODEC_ID_CPIA
Definition: avcodec.h:424
@ AV_CODEC_ID_JPEG2000
Definition: avcodec.h:306
@ AV_CODEC_ID_PCM_S24LE_PLANAR
Definition: avcodec.h:491
@ AV_CODEC_ID_ZLIB
Definition: avcodec.h:272
@ AV_CODEC_ID_MWSC
Definition: avcodec.h:452
@ AV_CODEC_ID_PCM_S16BE
Definition: avcodec.h:464
@ AV_CODEC_ID_HDMV_TEXT_SUBTITLE
Definition: avcodec.h:682
@ AV_CODEC_ID_VMNC
Definition: avcodec.h:307
@ AV_CODEC_ID_WMV2
Definition: avcodec.h:236
@ AV_CODEC_ID_LAGARITH
Definition: avcodec.h:365
@ AV_CODEC_ID_INTERPLAY_DPCM
Definition: avcodec.h:556
@ AV_CODEC_ID_REALTEXT
Definition: avcodec.h:672
@ AV_CODEC_ID_ADPCM_PSX
Definition: avcodec.h:540
@ AV_CODEC_ID_PCM_S24LE
Definition: avcodec.h:475
@ AV_CODEC_ID_MXPEG
Definition: avcodec.h:364
@ AV_CODEC_ID_ADPCM_XA
Definition: avcodec.h:510
@ AV_CODEC_ID_PCM_U24BE
Definition: avcodec.h:478
@ AV_CODEC_ID_MSMPEG4V2
Definition: avcodec.h:233
@ AV_CODEC_ID_SSA
Definition: avcodec.h:662
@ AV_CODEC_ID_MP1
Definition: avcodec.h:606
@ AV_CODEC_ID_CINEPAK
Definition: avcodec.h:261
@ AV_CODEC_ID_ESCAPE130
Definition: avcodec.h:388
@ AV_CODEC_ID_SGIRLE
Definition: avcodec.h:401
@ AV_CODEC_ID_SUBRIP
Definition: avcodec.h:676
@ AV_CODEC_ID_RALF
Definition: avcodec.h:621
@ AV_CODEC_ID_CLJR
Definition: avcodec.h:254
@ AV_CODEC_ID_MTS2
Definition: avcodec.h:383
@ AV_CODEC_ID_IMC
Definition: avcodec.h:591
@ AV_CODEC_ID_SUNRAST
Definition: avcodec.h:328
@ AV_CODEC_ID_VC1IMAGE
Definition: avcodec.h:370
@ AV_CODEC_ID_PCM_S24DAUD
Definition: avcodec.h:479
@ AV_CODEC_ID_TSCC
Definition: avcodec.h:274
@ AV_CODEC_ID_ADPCM_YAMAHA
Definition: avcodec.h:516
@ AV_CODEC_ID_FIRST_UNKNOWN
A dummy ID pointing at the start of various fake codecs.
Definition: avcodec.h:687
@ AV_CODEC_ID_APTX_HD
Definition: avcodec.h:651
@ AV_CODEC_ID_BITPACKED
Definition: avcodec.h:444
@ AV_CODEC_ID_ADPCM_SBPRO_3
Definition: avcodec.h:518
@ AV_CODEC_ID_FFV1
Definition: avcodec.h:251
@ AV_CODEC_ID_SCTE_35
Contain timestamp estimated through PCR of program stream.
Definition: avcodec.h:690
@ AV_CODEC_ID_MVC1
Definition: avcodec.h:402
@ AV_CODEC_ID_SDX2_DPCM
Definition: avcodec.h:560
@ AV_CODEC_ID_ADPCM_EA_R2
Definition: avcodec.h:524
@ AV_CODEC_ID_PCM_S32LE
Definition: avcodec.h:471
@ AV_CODEC_ID_RA_288
Definition: avcodec.h:552
@ AV_CODEC_ID_ATRAC3P
Definition: avcodec.h:603
@ AV_CODEC_ID_CSCD
Definition: avcodec.h:297
@ AV_CODEC_ID_ADPCM_G726LE
Definition: avcodec.h:538
@ AV_CODEC_ID_ADPCM_IMA_ISS
Definition: avcodec.h:529
@ AV_CODEC_ID_PCM_S8
Definition: avcodec.h:467
@ AV_CODEC_ID_ULTI
Definition: avcodec.h:275
@ AV_CODEC_ID_WESTWOOD_SND1
Definition: avcodec.h:581
@ AV_CODEC_ID_GDV
Definition: avcodec.h:448
@ AV_CODEC_ID_IDF
Definition: avcodec.h:693
@ AV_CODEC_ID_SGI
Definition: avcodec.h:319
@ AV_CODEC_ID_BINKAUDIO_DCT
Definition: avcodec.h:612
@ AV_CODEC_ID_AV1
Definition: avcodec.h:443
@ AV_CODEC_ID_SOL_DPCM
Definition: avcodec.h:558
@ AV_CODEC_ID_ADPCM_ADX
Definition: avcodec.h:511
@ AV_CODEC_ID_ADPCM_MS
Definition: avcodec.h:508
@ AV_CODEC_ID_GSM_MS
Definition: avcodec.h:594
@ AV_CODEC_ID_PAM
Definition: avcodec.h:284
@ AV_CODEC_ID_PCM_U32LE
Definition: avcodec.h:473
@ AV_CODEC_ID_PCM_VIDC
Definition: avcodec.h:499
@ AV_CODEC_ID_FLASHSV2
Definition: avcodec.h:349
@ AV_CODEC_ID_BINKVIDEO
Definition: avcodec.h:353
@ AV_CODEC_ID_TTF
Definition: avcodec.h:688
@ AV_CODEC_ID_INDEO2
Definition: avcodec.h:293
@ AV_CODEC_ID_XBM
Definition: avcodec.h:378
@ AV_CODEC_ID_INTERPLAY_VIDEO
Definition: avcodec.h:257
@ AV_CODEC_ID_ADPCM_SBPRO_4
Definition: avcodec.h:517
@ AV_CODEC_ID_SHEERVIDEO
Definition: avcodec.h:434
@ AV_CODEC_ID_SRGC
Definition: avcodec.h:446
@ AV_CODEC_ID_ADPCM_EA_MAXIS_XA
Definition: avcodec.h:528
@ AV_CODEC_ID_PBM
Definition: avcodec.h:281
@ AV_CODEC_ID_CDGRAPHICS
Definition: avcodec.h:350
@ AV_CODEC_ID_A64_MULTI5
Definition: avcodec.h:362
@ AV_CODEC_ID_VC1
Definition: avcodec.h:288
@ AV_CODEC_ID_VP8
Definition: avcodec.h:358
@ AV_CODEC_ID_PCM_ALAW
Definition: avcodec.h:470
@ AV_CODEC_ID_PCM_F64LE
Definition: avcodec.h:486
@ AV_CODEC_ID_SUBVIEWER1
Definition: avcodec.h:674
@ AV_CODEC_ID_WMV3IMAGE
Definition: avcodec.h:369
@ AV_CODEC_ID_VCR1
Definition: avcodec.h:253
@ AV_CODEC_ID_VBLE
Definition: avcodec.h:373
@ AV_CODEC_ID_DSICINAUDIO
Definition: avcodec.h:590
@ AV_CODEC_ID_ADPCM_IMA_APC
Definition: avcodec.h:531
@ AV_CODEC_ID_WMALOSSLESS
Definition: avcodec.h:602
@ AV_CODEC_ID_ALAC
Definition: avcodec.h:580
@ AV_CODEC_ID_INDEO3
Definition: avcodec.h:246
@ AV_CODEC_ID_TXD
Definition: avcodec.h:323
@ AV_CODEC_ID_WMV1
Definition: avcodec.h:235
@ AV_CODEC_ID_PCX
Definition: avcodec.h:327
@ AV_CODEC_ID_WEBVTT
Definition: avcodec.h:677
@ AV_CODEC_ID_XFACE
Definition: avcodec.h:425
@ AV_CODEC_ID_WMAV1
Definition: avcodec.h:571
@ AV_CODEC_ID_V308
Definition: avcodec.h:420
@ AV_CODEC_ID_EIA_608
Definition: avcodec.h:669
@ AV_CODEC_ID_BMV_AUDIO
Definition: avcodec.h:620
@ AV_CODEC_ID_RV10
Definition: avcodec.h:223
@ AV_CODEC_ID_KGV1
Definition: avcodec.h:356
@ AV_CODEC_ID_FITS
Definition: avcodec.h:449
@ AV_CODEC_ID_COMFORT_NOISE
Definition: avcodec.h:625
@ AV_CODEC_ID_ARIB_CAPTION
Definition: avcodec.h:684
@ AV_CODEC_ID_AMR_NB
Definition: avcodec.h:547
@ AV_CODEC_ID_VP6A
Definition: avcodec.h:324
@ AV_CODEC_ID_CAVS
Definition: avcodec.h:305
@ AV_CODEC_ID_TIERTEXSEQVIDEO
Definition: avcodec.h:313
@ AV_CODEC_ID_SCPR
Definition: avcodec.h:440
@ AV_CODEC_ID_VMDVIDEO
Definition: avcodec.h:270
@ AV_CODEC_ID_THEORA
Definition: avcodec.h:248
@ AV_CODEC_ID_ADPCM_IMA_AMV
Definition: avcodec.h:521
@ AV_CODEC_ID_TRUESPEECH
Definition: avcodec.h:585
@ AV_CODEC_ID_ADPCM_EA_XAS
Definition: avcodec.h:527
@ AV_CODEC_ID_PCM_U16BE
Definition: avcodec.h:466
@ AV_CODEC_ID_CODEC2
Definition: avcodec.h:631
@ AV_CODEC_ID_SANM
Definition: avcodec.h:400
@ AV_CODEC_ID_FLIC
Definition: avcodec.h:268
@ AV_CODEC_ID_ATRAC3AL
Definition: avcodec.h:647
@ AV_CODEC_ID_MUSEPACK8
Definition: avcodec.h:598
@ AV_CODEC_ID_MP2
Definition: avcodec.h:564
@ AV_CODEC_ID_V210X
Definition: avcodec.h:343
@ AV_CODEC_ID_DVAUDIO
Definition: avcodec.h:570
@ AV_CODEC_ID_ADPCM_AGM
Definition: avcodec.h:544
@ AV_CODEC_ID_DXV
Definition: avcodec.h:409
@ AV_CODEC_ID_TRUEMOTION1
Definition: avcodec.h:269
@ AV_CODEC_ID_WMAV2
Definition: avcodec.h:572
@ AV_CODEC_ID_VPLAYER
Definition: avcodec.h:679
@ AV_CODEC_ID_ATRAC3PAL
Definition: avcodec.h:648
@ AV_CODEC_ID_TQI
Definition: avcodec.h:340
@ AV_CODEC_ID_TTA
Definition: avcodec.h:586
@ AV_CODEC_ID_BRENDER_PIX
Definition: avcodec.h:396
@ AV_CODEC_ID_MSS2
Definition: avcodec.h:385
@ AV_CODEC_ID_TAK
Definition: avcodec.h:626
@ AV_CODEC_ID_MDEC
Definition: avcodec.h:255
@ AV_CODEC_ID_TMV
Definition: avcodec.h:344
@ AV_CODEC_ID_ASS
Definition: avcodec.h:681
@ AV_CODEC_ID_HQX
Definition: avcodec.h:404
@ AV_CODEC_ID_ADPCM_IMA_DK4
Definition: avcodec.h:505
@ AV_CODEC_ID_NUV
Definition: avcodec.h:302
@ AV_CODEC_ID_CDXL
Definition: avcodec.h:377
@ AV_CODEC_ID_ROQ_DPCM
Definition: avcodec.h:555
@ AV_CODEC_ID_KMVC
Definition: avcodec.h:303
@ AV_CODEC_ID_TGQ
Definition: avcodec.h:339
@ AV_CODEC_ID_ADPCM_IMA_DK3
Definition: avcodec.h:504
@ AV_CODEC_ID_PCM_LXF
Definition: avcodec.h:488
@ AV_CODEC_ID_JV
Definition: avcodec.h:367
@ AV_CODEC_ID_SPEEDHQ
Definition: avcodec.h:438
@ AV_CODEC_ID_RV40
Definition: avcodec.h:287
@ AV_CODEC_ID_ADPCM_IMA_DAT4
Definition: avcodec.h:542
@ AV_CODEC_ID_RL2
Definition: avcodec.h:332
@ AV_CODEC_ID_DVVIDEO
Definition: avcodec.h:242
@ AV_CODEC_ID_FMVC
Definition: avcodec.h:439
@ AV_CODEC_ID_ADPCM_IMA_QT
Definition: avcodec.h:502
@ AV_CODEC_ID_ADPCM_EA
Definition: avcodec.h:512
@ AV_CODEC_ID_DTS
Definition: avcodec.h:568
@ AV_CODEC_ID_DSD_MSBF
Definition: avcodec.h:639
@ AV_CODEC_ID_HEVC
Definition: avcodec.h:392
@ AV_CODEC_ID_RV30
Definition: avcodec.h:286
@ AV_CODEC_ID_COOK
Definition: avcodec.h:584
@ AV_CODEC_ID_FFMETADATA
Dummy codec for streams containing only metadata information.
Definition: avcodec.h:707
@ AV_CODEC_ID_BIN_DATA
Definition: avcodec.h:698
@ AV_CODEC_ID_PCM_S64LE
Definition: avcodec.h:495
@ AV_CODEC_ID_MMVIDEO
Definition: avcodec.h:298
@ AV_CODEC_ID_MJPEGB
Definition: avcodec.h:226
@ AV_CODEC_ID_ADPCM_G726
Definition: avcodec.h:513
@ AV_CODEC_ID_G2M
Definition: avcodec.h:389
@ AV_CODEC_ID_DVD_NAV
Definition: avcodec.h:696
@ AV_CODEC_ID_SMC
Definition: avcodec.h:267
@ AV_CODEC_ID_ATRAC3
Definition: avcodec.h:595
@ AV_CODEC_ID_SUBVIEWER
Definition: avcodec.h:675
@ AV_CODEC_ID_AASC
Definition: avcodec.h:292
@ AV_CODEC_ID_AAC
Definition: avcodec.h:566
@ AV_CODEC_ID_VP4
Definition: avcodec.h:459
@ AV_CODEC_ID_A64_MULTI
Definition: avcodec.h:361
@ AV_CODEC_ID_ADPCM_IMA_SMJPEG
Definition: avcodec.h:507
@ AV_CODEC_ID_PGMYUV
Definition: avcodec.h:283
@ AV_CODEC_ID_SMVJPEG
Definition: avcodec.h:427
@ AV_CODEC_ID_ADPCM_MTAF
Definition: avcodec.h:543
@ AV_CODEC_ID_RV20
Definition: avcodec.h:224
@ AV_CODEC_ID_PRORES
Definition: avcodec.h:366
@ AV_CODEC_ID_TIFF
Definition: avcodec.h:314
@ AV_CODEC_ID_XWD
Definition: avcodec.h:376
@ AV_CODEC_ID_XAN_DPCM
Definition: avcodec.h:557
@ AV_CODEC_ID_ON2AVC
Definition: avcodec.h:629
@ AV_CODEC_ID_PPM
Definition: avcodec.h:280
@ AV_CODEC_ID_ALIAS_PIX
Definition: avcodec.h:395
@ AV_CODEC_ID_BFI
Definition: avcodec.h:335
@ AV_CODEC_ID_DST
Definition: avcodec.h:646
@ AV_CODEC_ID_HCOM
Definition: avcodec.h:654
@ AV_CODEC_ID_TRUEHD
Definition: avcodec.h:608
@ AV_CODEC_ID_NELLYMOSER
Definition: avcodec.h:597
@ AV_CODEC_ID_ATRAC9
Definition: avcodec.h:653
@ AV_CODEC_ID_FIRST_AUDIO
A dummy id pointing at the start of audio codecs.
Definition: avcodec.h:462
@ AV_CODEC_ID_SONIC_LS
Definition: avcodec.h:635
@ AV_CODEC_ID_PAF_AUDIO
Definition: avcodec.h:628
@ AV_CODEC_ID_FLAC
Definition: avcodec.h:576
@ AV_CODEC_ID_BMP
Definition: avcodec.h:296
@ AV_CODEC_ID_FIC
Definition: avcodec.h:394
@ AV_CODEC_ID_VP5
Definition: avcodec.h:308
@ AV_CODEC_ID_PCM_F64BE
Definition: avcodec.h:485
@ AV_CODEC_ID_TRUEMOTION2
Definition: avcodec.h:295
@ AV_CODEC_ID_HAP
Definition: avcodec.h:407
@ AV_CODEC_ID_EXR
Definition: avcodec.h:398
@ AV_CODEC_ID_LJPEG
Definition: avcodec.h:227
@ AV_CODEC_ID_HNM4_VIDEO
Definition: avcodec.h:391
@ AV_CODEC_ID_MSCC
Definition: avcodec.h:445
@ AV_CODEC_ID_AYUV
Definition: avcodec.h:418
@ AV_CODEC_ID_ADPCM_AICA
Definition: avcodec.h:541
@ AV_CODEC_ID_C93
Definition: avcodec.h:320
@ AV_CODEC_ID_H263
Definition: avcodec.h:222
@ AV_CODEC_ID_HYMT
Definition: avcodec.h:455
@ AV_CODEC_ID_MVC2
Definition: avcodec.h:403
@ AV_CODEC_ID_QCELP
Definition: avcodec.h:588
@ AV_CODEC_ID_AMR_WB
Definition: avcodec.h:548
@ AV_CODEC_ID_WNV1
Definition: avcodec.h:291
@ AV_CODEC_ID_OTF
Definition: avcodec.h:694
@ AV_CODEC_ID_AC3
Definition: avcodec.h:567
@ AV_CODEC_ID_WEBP
Definition: avcodec.h:390
@ AV_CODEC_ID_MP3ON4
Definition: avcodec.h:578
@ AV_CODEC_ID_JPEGLS
Definition: avcodec.h:229
@ AV_CODEC_ID_IMM4
Definition: avcodec.h:450
@ AV_CODEC_ID_TSCC2
Definition: avcodec.h:382
@ AV_CODEC_ID_MACE3
Definition: avcodec.h:573
@ AV_CODEC_ID_SCREENPRESSO
Definition: avcodec.h:410
@ AV_CODEC_ID_QPEG
Definition: avcodec.h:278
@ AV_CODEC_ID_DVB_TELETEXT
Definition: avcodec.h:665
@ AV_CODEC_ID_MACE6
Definition: avcodec.h:574
@ AV_CODEC_ID_GREMLIN_DPCM
Definition: avcodec.h:561
@ AV_CODEC_ID_QDM2
Definition: avcodec.h:583
@ AV_CODEC_ID_PCM_S32BE
Definition: avcodec.h:472
@ AV_CODEC_ID_DNXHD
Definition: avcodec.h:317
@ AV_CODEC_ID_SONIC
Definition: avcodec.h:634
@ AV_CODEC_ID_ADPCM_THP
Definition: avcodec.h:520
@ AV_CODEC_ID_ANSI
Definition: avcodec.h:360
@ AV_CODEC_ID_8SVX_FIB
Definition: avcodec.h:619
@ AV_CODEC_ID_QDRAW
Definition: avcodec.h:276
@ AV_CODEC_ID_SMACKAUDIO
Definition: avcodec.h:587
@ AV_CODEC_ID_SVQ1
Definition: avcodec.h:240
@ AV_CODEC_ID_MLP
Definition: avcodec.h:593
@ AV_CODEC_ID_RA_144
Definition: avcodec.h:551
@ AV_CODEC_ID_ADPCM_AFC
Definition: avcodec.h:534
@ AV_CODEC_ID_MPEG4
Definition: avcodec.h:230
@ AV_CODEC_ID_SVG
Definition: avcodec.h:447
@ AV_CODEC_ID_MJPEG
Definition: avcodec.h:225
@ AV_CODEC_ID_ADPCM_IMA_WAV
Definition: avcodec.h:503
@ AV_CODEC_ID_ASV1
Definition: avcodec.h:249
@ AV_CODEC_ID_AVS2
Definition: avcodec.h:412
@ AV_CODEC_ID_WMV3
Definition: avcodec.h:289
@ AV_CODEC_ID_ADPCM_THP_LE
Definition: avcodec.h:539
@ AV_CODEC_ID_DSS_SP
Definition: avcodec.h:630
@ AV_CODEC_ID_MAGICYUV
Definition: avcodec.h:433
@ AV_CODEC_ID_MP3ADU
Definition: avcodec.h:577
@ AV_CODEC_ID_R10K
Definition: avcodec.h:363
@ AV_CODEC_ID_SP5X
Definition: avcodec.h:228
@ AV_CODEC_ID_BINKAUDIO_RDFT
Definition: avcodec.h:611
@ AV_CODEC_ID_PCM_ZORK
Definition: avcodec.h:480
@ AV_CODEC_ID_PCM_S16LE_PLANAR
Definition: avcodec.h:481
@ AV_CODEC_ID_MIMIC
Definition: avcodec.h:331
@ AV_CODEC_ID_MPEG4SYSTEMS
FAKE codec to indicate a MPEG-4 Systems stream (only used by libavformat)
Definition: avcodec.h:705
@ AV_CODEC_ID_LOCO
Definition: avcodec.h:290
@ AV_CODEC_ID_ADPCM_EA_R3
Definition: avcodec.h:523
@ AV_CODEC_ID_PCM_U24LE
Definition: avcodec.h:477
@ AV_CODEC_ID_TWINVQ
Definition: avcodec.h:607
@ AV_CODEC_ID_SPEEX
Definition: avcodec.h:599
@ AV_CODEC_ID_ASV2
Definition: avcodec.h:250
@ AV_CODEC_ID_WAVPACK
Definition: avcodec.h:589
@ AV_CODEC_ID_H263I
Definition: avcodec.h:238
@ AV_CODEC_ID_ADPCM_VIMA
Definition: avcodec.h:532
@ AV_CODEC_ID_ZMBV
Definition: avcodec.h:299
@ AV_CODEC_ID_ADPCM_IMA_RAD
Definition: avcodec.h:537
@ AV_CODEC_ID_AVUI
Definition: avcodec.h:417
@ AV_CODEC_ID_ROQ
Definition: avcodec.h:256
@ AV_CODEC_ID_ILBC
Definition: avcodec.h:623
@ AV_CODEC_ID_ANM
Definition: avcodec.h:352
@ AV_CODEC_ID_THP
Definition: avcodec.h:318
@ AV_CODEC_ID_MP3
preferred ID for decoding MPEG audio layer 1, 2 or 3
Definition: avcodec.h:565
@ AV_CODEC_ID_VP9
Definition: avcodec.h:386
@ AV_CODEC_ID_FLASHSV
Definition: avcodec.h:304
@ AV_CODEC_ID_XBIN
Definition: avcodec.h:692
@ AV_CODEC_ID_MPEG1VIDEO
Definition: avcodec.h:219
@ AV_CODEC_ID_ZEROCODEC
Definition: avcodec.h:379
@ AV_CODEC_ID_BINTEXT
Definition: avcodec.h:691
@ AV_CODEC_ID_AAC_LATM
Definition: avcodec.h:613
@ AV_CODEC_ID_QDMC
Definition: avcodec.h:614
@ AV_CODEC_ID_DPX
Definition: avcodec.h:346
@ AV_CODEC_ID_H263P
Definition: avcodec.h:237
@ AV_CODEC_ID_MSMPEG4V3
Definition: avcodec.h:234
@ AV_CODEC_ID_DXA
Definition: avcodec.h:316
@ AV_CODEC_ID_OPUS
Definition: avcodec.h:624
@ AV_CODEC_ID_TDSC
Definition: avcodec.h:405
@ AV_CODEC_ID_012V
Definition: avcodec.h:416
@ AV_CODEC_ID_DXTORY
Definition: avcodec.h:374
@ AV_CODEC_ID_MPEG2VIDEO
preferred ID for MPEG-1/2 video decoding
Definition: avcodec.h:220
@ AV_CODEC_ID_MSZH
Definition: avcodec.h:271
@ AV_CODEC_ID_PCM_U16LE
Definition: avcodec.h:465
@ AV_CODEC_ID_FRAPS
Definition: avcodec.h:294
@ AV_CODEC_ID_MSS1
Definition: avcodec.h:380
@ AV_CODEC_ID_MSVIDEO1
Definition: avcodec.h:264
@ AV_CODEC_ID_PCM_S8_PLANAR
Definition: avcodec.h:490
@ AV_CODEC_ID_HQ_HQA
Definition: avcodec.h:406
@ AV_CODEC_ID_PCM_U32BE
Definition: avcodec.h:474
@ AV_CODEC_ID_AMV
Definition: avcodec.h:325
@ AV_CODEC_ID_DDS
Definition: avcodec.h:408
@ AV_CODEC_ID_MICRODVD
Definition: avcodec.h:668
@ AV_CODEC_ID_4XM
Definition: avcodec.h:252
@ AV_CODEC_ID_AVRN
Definition: avcodec.h:423
@ AV_CODEC_ID_WMAPRO
Definition: avcodec.h:601
@ AV_CODEC_ID_TARGA_Y216
Definition: avcodec.h:419
@ AV_CODEC_ID_MOV_TEXT
Definition: avcodec.h:663
@ AV_CODEC_ID_PCM_MULAW
Definition: avcodec.h:469
@ AV_CODEC_ID_METASOUND
Definition: avcodec.h:627
@ AV_CODEC_HW_CONFIG_METHOD_AD_HOC
The codec supports this format by some ad-hoc method.
Definition: avcodec.h:3452
@ AV_CODEC_HW_CONFIG_METHOD_HW_FRAMES_CTX
The codec supports this format via the hw_frames_ctx interface.
Definition: avcodec.h:3436
@ AV_CODEC_HW_CONFIG_METHOD_HW_DEVICE_CTX
The codec supports this format via the hw_device_ctx interface.
Definition: avcodec.h:3427
@ AV_CODEC_HW_CONFIG_METHOD_INTERNAL
The codec supports this format by some internal method.
Definition: avcodec.h:3443
@ AV_AUDIO_SERVICE_TYPE_VOICE_OVER
Definition: avcodec.h:822
@ AV_AUDIO_SERVICE_TYPE_EMERGENCY
Definition: avcodec.h:821
@ AV_AUDIO_SERVICE_TYPE_EFFECTS
Definition: avcodec.h:816
@ AV_AUDIO_SERVICE_TYPE_MAIN
Definition: avcodec.h:815
@ AV_AUDIO_SERVICE_TYPE_DIALOGUE
Definition: avcodec.h:819
@ AV_AUDIO_SERVICE_TYPE_KARAOKE
Definition: avcodec.h:823
@ AV_AUDIO_SERVICE_TYPE_HEARING_IMPAIRED
Definition: avcodec.h:818
@ AV_AUDIO_SERVICE_TYPE_COMMENTARY
Definition: avcodec.h:820
@ AV_AUDIO_SERVICE_TYPE_NB
Not part of ABI.
Definition: avcodec.h:824
@ AV_AUDIO_SERVICE_TYPE_VISUALLY_IMPAIRED
Definition: avcodec.h:817
int avcodec_default_get_buffer2(AVCodecContext *s, AVFrame *frame, int flags)
The default callback for AVCodecContext.get_buffer2().
int avcodec_receive_frame(AVCodecContext *avctx, AVFrame *frame)
Return decoded output data from a decoder.
int avcodec_enum_to_chroma_pos(int *xpos, int *ypos, enum AVChromaLocation pos)
Converts AVChromaLocation to swscale x/y chroma position.
AVCodec * avcodec_find_decoder(enum AVCodecID id)
Find a registered decoder with a matching codec ID.
enum AVChromaLocation avcodec_chroma_pos_to_enum(int xpos, int ypos)
Converts swscale x/y chroma position to AVChromaLocation.
void avcodec_align_dimensions2(AVCodecContext *s, int *width, int *height, int linesize_align[AV_NUM_DATA_POINTERS])
Modify width and height values so that they will result in a memory buffer that is acceptable for the...
AVDiscard
Definition: avcodec.h:802
AVCodec * avcodec_find_decoder_by_name(const char *name)
Find a registered decoder with the specified name.
attribute_deprecated int avcodec_decode_video2(AVCodecContext *avctx, AVFrame *picture, int *got_picture_ptr, const AVPacket *avpkt)
Decode the video frame of size avpkt->size from avpkt->data into picture.
int avcodec_decode_subtitle2(AVCodecContext *avctx, AVSubtitle *sub, int *got_sub_ptr, AVPacket *avpkt)
Decode a subtitle message.
void avcodec_align_dimensions(AVCodecContext *s, int *width, int *height)
Modify width and height values so that they will result in a memory buffer that is acceptable for the...
int avcodec_send_packet(AVCodecContext *avctx, const AVPacket *avpkt)
Supply raw packet data as input to a decoder.
int avcodec_receive_packet(AVCodecContext *avctx, AVPacket *avpkt)
Read encoded data from the encoder.
int avcodec_get_hw_frames_parameters(AVCodecContext *avctx, AVBufferRef *device_ref, enum AVPixelFormat hw_pix_fmt, AVBufferRef **out_frames_ref)
Create and return a AVHWFramesContext with values adequate for hardware decoding.
int avcodec_send_frame(AVCodecContext *avctx, const AVFrame *frame)
Supply a raw video or audio frame to the encoder.
attribute_deprecated int avcodec_decode_audio4(AVCodecContext *avctx, AVFrame *frame, int *got_frame_ptr, const AVPacket *avpkt)
Decode the audio frame of size avpkt->size from avpkt->data into frame.
@ AVDISCARD_ALL
discard all
Definition: avcodec.h:811
@ AVDISCARD_NONKEY
discard all frames except keyframes
Definition: avcodec.h:810
@ AVDISCARD_BIDIR
discard all bidirectional frames
Definition: avcodec.h:808
@ AVDISCARD_DEFAULT
discard useless packets like 0 size packets in avi
Definition: avcodec.h:806
@ AVDISCARD_NONE
discard nothing
Definition: avcodec.h:805
@ AVDISCARD_NONINTRA
discard all non intra frames
Definition: avcodec.h:809
@ AVDISCARD_NONREF
discard all non reference
Definition: avcodec.h:807
attribute_deprecated int avcodec_encode_video2(AVCodecContext *avctx, AVPacket *avpkt, const AVFrame *frame, int *got_packet_ptr)
Encode a frame of video.
AVCodec * avcodec_find_encoder_by_name(const char *name)
Find a registered encoder with the specified name.
int avcodec_encode_subtitle(AVCodecContext *avctx, uint8_t *buf, int buf_size, const AVSubtitle *sub)
AVCodec * avcodec_find_encoder(enum AVCodecID id)
Find a registered encoder with a matching codec ID.
attribute_deprecated int avcodec_encode_audio2(AVCodecContext *avctx, AVPacket *avpkt, const AVFrame *frame, int *got_packet_ptr)
Encode a frame of audio.
attribute_deprecated void avcodec_get_chroma_sub_sample(enum AVPixelFormat pix_fmt, int *h_shift, int *v_shift)
enum AVPixelFormat avcodec_find_best_pix_fmt_of_2(enum AVPixelFormat dst_pix_fmt1, enum AVPixelFormat dst_pix_fmt2, enum AVPixelFormat src_pix_fmt, int has_alpha, int *loss_ptr)
enum AVPixelFormat avcodec_default_get_format(struct AVCodecContext *s, const enum AVPixelFormat *fmt)
int avcodec_get_pix_fmt_loss(enum AVPixelFormat dst_pix_fmt, enum AVPixelFormat src_pix_fmt, int has_alpha)
unsigned int avcodec_pix_fmt_to_codec_tag(enum AVPixelFormat pix_fmt)
Return a value representing the fourCC code associated to the pixel format pix_fmt,...
enum AVPixelFormat avcodec_find_best_pix_fmt_of_list(const enum AVPixelFormat *pix_fmt_list, enum AVPixelFormat src_pix_fmt, int has_alpha, int *loss_ptr)
Find the best pixel format to convert to given a certain source pixel format.
attribute_deprecated enum AVPixelFormat avcodec_find_best_pix_fmt2(enum AVPixelFormat dst_pix_fmt1, enum AVPixelFormat dst_pix_fmt2, enum AVPixelFormat src_pix_fmt, int has_alpha, int *loss_ptr)
attribute_deprecated AVBitStreamFilterContext * av_bitstream_filter_init(const char *name)
void av_fast_padded_malloc(void *ptr, unsigned int *size, size_t min_size)
Same behaviour av_fast_malloc but the buffer has additional AV_INPUT_BUFFER_PADDING_SIZE at the end w...
int av_get_bits_per_sample(enum AVCodecID codec_id)
Return codec bits per sample.
void av_bsf_free(AVBSFContext **ctx)
Free a bitstream filter context and everything associated with it; write NULL into the supplied point...
void av_bsf_list_free(AVBSFList **lst)
Free list of bitstream filters.
const AVCodecDescriptor * avcodec_descriptor_get(enum AVCodecID id)
unsigned int av_xiphlacing(unsigned char *s, unsigned int v)
Encode extradata length to a buffer.
const AVBitStreamFilter * av_bsf_iterate(void **opaque)
Iterate over all registered bitstream filters.
int av_get_audio_frame_duration2(AVCodecParameters *par, int frame_bytes)
This function is the same as av_get_audio_frame_duration(), except it works with AVCodecParameters in...
int av_bsf_init(AVBSFContext *ctx)
Prepare the filter for use, after all the parameters and options have been set.
attribute_deprecated void av_bitstream_filter_close(AVBitStreamFilterContext *bsf)
int av_codec_is_encoder(const AVCodec *codec)
int av_get_audio_frame_duration(AVCodecContext *avctx, int frame_bytes)
Return audio frame duration.
int avcodec_default_execute2(AVCodecContext *c, int(*func)(AVCodecContext *c2, void *arg2, int, int), void *arg, int *ret, int count)
attribute_deprecated int av_lockmgr_register(int(*cb)(void **mutex, enum AVLockOp op))
Register a user provided lock manager supporting the operations specified by AVLockOp.
int av_bsf_list_append(AVBSFList *lst, AVBSFContext *bsf)
Append bitstream filter to the list of bitstream filters.
attribute_deprecated AVHWAccel * av_hwaccel_next(const AVHWAccel *hwaccel)
If hwaccel is NULL, returns the first registered hardware accelerator, if hwaccel is non-NULL,...
const char * avcodec_profile_name(enum AVCodecID codec_id, int profile)
Return a name for the specified profile, if available.
attribute_deprecated const AVBitStreamFilter * av_bsf_next(void **opaque)
int avcodec_fill_audio_frame(AVFrame *frame, int nb_channels, enum AVSampleFormat sample_fmt, const uint8_t *buf, int buf_size, int align)
Fill AVFrame audio data and linesize pointers.
void avcodec_string(char *buf, int buf_size, AVCodecContext *enc, int encode)
attribute_deprecated void av_register_bitstream_filter(AVBitStreamFilter *bsf)
int av_codec_is_decoder(const AVCodec *codec)
void av_bsf_flush(AVBSFContext *ctx)
Reset the internal bitstream filter state / flush internal buffers.
const AVClass * av_bsf_get_class(void)
Get the AVClass for AVBSFContext.
attribute_deprecated void av_register_hwaccel(AVHWAccel *hwaccel)
Register the hardware accelerator hwaccel.
AVLockOp
Lock operation used by lockmgr.
Definition: avcodec.h:6129
int av_bsf_alloc(const AVBitStreamFilter *filter, AVBSFContext **ctx)
Allocate a context for a given bitstream filter.
int av_bsf_receive_packet(AVBSFContext *ctx, AVPacket *pkt)
Retrieve a filtered packet.
attribute_deprecated int av_bitstream_filter_filter(AVBitStreamFilterContext *bsfc, AVCodecContext *avctx, const char *args, uint8_t **poutbuf, int *poutbuf_size, const uint8_t *buf, int buf_size, int keyframe)
struct AVBSFInternal AVBSFInternal
Definition: avcodec.h:5751
int avcodec_is_open(AVCodecContext *s)
enum AVMediaType avcodec_get_type(enum AVCodecID codec_id)
Get the type of the given codec.
attribute_deprecated const AVBitStreamFilter * av_bitstream_filter_next(const AVBitStreamFilter *f)
int avcodec_default_execute(AVCodecContext *c, int(*func)(AVCodecContext *c2, void *arg2), void *arg, int *ret, int count, int size)
int av_bsf_list_finalize(AVBSFList **lst, AVBSFContext **bsf)
Finalize list of bitstream filters.
const char * avcodec_get_name(enum AVCodecID id)
Get the name of a codec.
int av_bsf_send_packet(AVBSFContext *ctx, AVPacket *pkt)
Submit a packet for filtering.
AVCPBProperties * av_cpb_properties_alloc(size_t *size)
Allocate a CPB properties structure and initialize its fields to default values.
AVBSFList * av_bsf_list_alloc(void)
Allocate empty list of bitstream filters.
int av_bsf_list_parse_str(const char *str, AVBSFContext **bsf)
Parse string describing list of bitstream filters and create single AVBSFContext describing the whole...
const AVCodecDescriptor * avcodec_descriptor_next(const AVCodecDescriptor *prev)
Iterate over all codec descriptors known to libavcodec.
struct AVBSFList AVBSFList
Structure for chain/list of bitstream filters.
Definition: avcodec.h:5995
const AVCodecDescriptor * avcodec_descriptor_get_by_name(const char *name)
int av_bsf_get_null_filter(AVBSFContext **bsf)
Get null/pass-through bitstream filter.
int av_get_exact_bits_per_sample(enum AVCodecID codec_id)
Return codec bits per sample.
void av_fast_padded_mallocz(void *ptr, unsigned int *size, size_t min_size)
Same behaviour av_fast_padded_malloc except that buffer will always be 0-initialized after call.
void avcodec_flush_buffers(AVCodecContext *avctx)
Reset the internal decoder state / flush internal buffers.
const AVBitStreamFilter * av_bsf_get_by_name(const char *name)
int av_bsf_list_append2(AVBSFList *lst, const char *bsf_name, AVDictionary **options)
Construct new bitstream filter context given it's name and options and append it to the list of bitst...
attribute_deprecated size_t av_get_codec_tag_string(char *buf, size_t buf_size, unsigned int codec_tag)
Put a string representing the codec tag codec_tag in buf.
const char * av_get_profile_name(const AVCodec *codec, int profile)
Return a name for the specified profile, if available.
enum AVCodecID av_get_pcm_codec(enum AVSampleFormat fmt, int be)
Return the PCM codec associated with a sample format.
@ AV_LOCK_CREATE
Create a mutex.
Definition: avcodec.h:6130
@ AV_LOCK_RELEASE
Unlock the mutex.
Definition: avcodec.h:6132
@ AV_LOCK_DESTROY
Free mutex resources.
Definition: avcodec.h:6133
@ AV_LOCK_OBTAIN
Lock the mutex.
Definition: avcodec.h:6131
void av_packet_free(AVPacket **pkt)
Free the packet, if the packet is reference counted, it will be unreferenced first.
int av_packet_unpack_dictionary(const uint8_t *data, int size, AVDictionary **dict)
Unpack a dictionary from side_data.
attribute_deprecated int av_dup_packet(AVPacket *pkt)
uint8_t * av_packet_pack_dictionary(AVDictionary *dict, int *size)
Pack a dictionary for use in side_data.
const char * av_packet_side_data_name(enum AVPacketSideDataType type)
AVSideDataParamChangeFlags
Definition: avcodec.h:1531
void av_packet_free_side_data(AVPacket *pkt)
Convenience function to free all the side data stored.
void av_packet_unref(AVPacket *pkt)
Wipe the packet.
attribute_deprecated int av_packet_split_side_data(AVPacket *pkt)
int av_grow_packet(AVPacket *pkt, int grow_by)
Increase packet size, correctly zeroing padding.
int av_packet_from_data(AVPacket *pkt, uint8_t *data, int size)
Initialize a reference-counted packet from av_malloc()ed data.
attribute_deprecated int av_packet_merge_side_data(AVPacket *pkt)
AVPacket * av_packet_clone(const AVPacket *src)
Create a new packet that references the same data as src.
int av_packet_make_refcounted(AVPacket *pkt)
Ensure the data described by a given packet is reference counted.
int av_packet_add_side_data(AVPacket *pkt, enum AVPacketSideDataType type, uint8_t *data, size_t size)
Wrap an existing array as a packet side data.
void av_packet_move_ref(AVPacket *dst, AVPacket *src)
Move every field in src to dst and reset src.
AVPacketSideDataType
Definition: avcodec.h:1184
attribute_deprecated int av_copy_packet_side_data(AVPacket *dst, const AVPacket *src)
Copy packet side data.
int av_packet_make_writable(AVPacket *pkt)
Create a writable reference for the data described by a given packet, avoiding data copy if possible.
uint8_t * av_packet_new_side_data(AVPacket *pkt, enum AVPacketSideDataType type, int size)
Allocate new information of a packet.
void av_init_packet(AVPacket *pkt)
Initialize optional fields of a packet with default values.
attribute_deprecated int av_copy_packet(AVPacket *dst, const AVPacket *src)
Copy packet, including contents.
void av_shrink_packet(AVPacket *pkt, int size)
Reduce packet size, correctly zeroing padding.
uint8_t * av_packet_get_side_data(const AVPacket *pkt, enum AVPacketSideDataType type, int *size)
Get side information from packet.
attribute_deprecated void av_free_packet(AVPacket *pkt)
Free a packet.
AVPacket * av_packet_alloc(void)
Allocate an AVPacket and set its fields to default values.
int av_packet_ref(AVPacket *dst, const AVPacket *src)
Setup a new reference to the data described by a given packet.
int av_packet_copy_props(AVPacket *dst, const AVPacket *src)
Copy only "properties" fields from src to dst.
int av_new_packet(AVPacket *pkt, int size)
Allocate the payload of a packet and initialize its fields with default values.
void av_packet_rescale_ts(AVPacket *pkt, AVRational tb_src, AVRational tb_dst)
Convert valid timing fields (timestamps / durations) in a packet from one timebase to another.
int av_packet_shrink_side_data(AVPacket *pkt, enum AVPacketSideDataType type, int size)
Shrink the already allocated side data buffer.
@ AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_COUNT
Definition: avcodec.h:1532
@ AV_SIDE_DATA_PARAM_CHANGE_CHANNEL_LAYOUT
Definition: avcodec.h:1533
@ AV_SIDE_DATA_PARAM_CHANGE_SAMPLE_RATE
Definition: avcodec.h:1534
@ AV_SIDE_DATA_PARAM_CHANGE_DIMENSIONS
Definition: avcodec.h:1535
@ AV_PKT_DATA_JP_DUALMONO
An AV_PKT_DATA_JP_DUALMONO side data packet indicates that the packet may contain "dual mono" audio s...
Definition: avcodec.h:1310
@ AV_PKT_DATA_STRINGS_METADATA
A list of zero terminated key/value strings.
Definition: avcodec.h:1316
@ AV_PKT_DATA_SKIP_SAMPLES
Recommmends skipping the specified number of samples.
Definition: avcodec.h:1300
@ AV_PKT_DATA_MPEGTS_STREAM_ID
MPEGTS stream ID as uint8_t, this is required to pass the stream ID information from the demuxer to t...
Definition: avcodec.h:1359
@ AV_PKT_DATA_H263_MB_INFO
An AV_PKT_DATA_H263_MB_INFO side data packet contains a number of structures with info about macroblo...
Definition: avcodec.h:1237
@ AV_PKT_DATA_MASTERING_DISPLAY_METADATA
Mastering display metadata (based on SMPTE-2086:2014).
Definition: avcodec.h:1366
@ AV_PKT_DATA_AUDIO_SERVICE_TYPE
This side data should be associated with an audio stream and corresponds to enum AVAudioServiceType.
Definition: avcodec.h:1264
@ AV_PKT_DATA_MATROSKA_BLOCKADDITIONAL
Data found in BlockAdditional element of matroska container.
Definition: avcodec.h:1335
@ AV_PKT_DATA_A53_CC
ATSC A53 Part 4 Closed Captions.
Definition: avcodec.h:1386
@ AV_PKT_DATA_SPHERICAL
This side data should be associated with a video stream and corresponds to the AVSphericalMapping str...
Definition: avcodec.h:1372
@ AV_PKT_DATA_QUALITY_STATS
This side data contains quality related information from the encoder.
Definition: avcodec.h:1276
@ AV_PKT_DATA_WEBVTT_SETTINGS
The optional settings (rendering instructions) that immediately follow the timestamp specifier of a W...
Definition: avcodec.h:1346
@ AV_PKT_DATA_METADATA_UPDATE
A list of zero terminated key/value strings.
Definition: avcodec.h:1353
@ AV_PKT_DATA_SUBTITLE_POSITION
Subtitle event position.
Definition: avcodec.h:1327
@ AV_PKT_DATA_PALETTE
An AV_PKT_DATA_PALETTE side data packet contains exactly AVPALETTE_SIZE bytes worth of palette.
Definition: avcodec.h:1190
@ AV_PKT_DATA_ENCRYPTION_INFO
This side data contains encryption info for how to decrypt the packet.
Definition: avcodec.h:1399
@ AV_PKT_DATA_DISPLAYMATRIX
This side data contains a 3x3 transformation matrix describing an affine transformation that needs to...
Definition: avcodec.h:1252
@ AV_PKT_DATA_AFD
Active Format Description data consisting of a single byte as specified in ETSI TS 101 154 using AVAc...
Definition: avcodec.h:1405
@ AV_PKT_DATA_ENCRYPTION_INIT_INFO
This side data is encryption initialization data.
Definition: avcodec.h:1393
@ AV_PKT_DATA_CPB_PROPERTIES
This side data corresponds to the AVCPBProperties struct.
Definition: avcodec.h:1289
@ AV_PKT_DATA_NEW_EXTRADATA
The AV_PKT_DATA_NEW_EXTRADATA is used to notify the codec or the format that the extradata buffer was...
Definition: avcodec.h:1199
@ AV_PKT_DATA_NB
The number of side data types.
Definition: avcodec.h:1415
@ AV_PKT_DATA_PARAM_CHANGE
An AV_PKT_DATA_PARAM_CHANGE side data packet is laid out as follows:
Definition: avcodec.h:1216
@ AV_PKT_DATA_STEREO3D
This side data should be associated with a video stream and contains Stereoscopic 3D information in f...
Definition: avcodec.h:1258
@ AV_PKT_DATA_WEBVTT_IDENTIFIER
The optional first identifier line of a WebVTT cue.
Definition: avcodec.h:1340
@ AV_PKT_DATA_CONTENT_LIGHT_LEVEL
Content light level (based on CTA-861.3).
Definition: avcodec.h:1379
@ AV_PKT_DATA_FALLBACK_TRACK
This side data contains an integer value representing the stream index of a "fallback" track.
Definition: avcodec.h:1284
@ AV_PKT_DATA_REPLAYGAIN
This side data should be associated with an audio stream and contains ReplayGain information in form ...
Definition: avcodec.h:1243
attribute_deprecated void av_register_codec_parser(AVCodecParser *parser)
void av_parser_close(AVCodecParserContext *s)
int av_parser_change(AVCodecParserContext *s, AVCodecContext *avctx, uint8_t **poutbuf, int *poutbuf_size, const uint8_t *buf, int buf_size, int keyframe)
attribute_deprecated AVCodecParser * av_parser_next(const AVCodecParser *c)
int av_parser_parse2(AVCodecParserContext *s, AVCodecContext *avctx, uint8_t **poutbuf, int *poutbuf_size, const uint8_t *buf, int buf_size, int64_t pts, int64_t dts, int64_t pos)
Parse a packet.
AVCodecParserContext * av_parser_init(int codec_id)
const AVCodecParser * av_parser_iterate(void **opaque)
Iterate over all registered codec parsers.
AVPictureStructure
Definition: avcodec.h:5101
@ AV_PICTURE_STRUCTURE_FRAME
Definition: avcodec.h:5105
@ AV_PICTURE_STRUCTURE_BOTTOM_FIELD
Definition: avcodec.h:5104
@ AV_PICTURE_STRUCTURE_TOP_FIELD
Definition: avcodec.h:5103
@ AV_PICTURE_STRUCTURE_UNKNOWN
Definition: avcodec.h:5102
attribute_deprecated void av_picture_copy(AVPicture *dst, const AVPicture *src, enum AVPixelFormat pix_fmt, int width, int height)
attribute_deprecated void avpicture_free(AVPicture *picture)
attribute_deprecated int avpicture_layout(const AVPicture *src, enum AVPixelFormat pix_fmt, int width, int height, unsigned char *dest, int dest_size)
attribute_deprecated int av_picture_pad(AVPicture *dst, const AVPicture *src, int height, int width, enum AVPixelFormat pix_fmt, int padtop, int padbottom, int padleft, int padright, int *color)
attribute_deprecated int avpicture_fill(AVPicture *picture, const uint8_t *ptr, enum AVPixelFormat pix_fmt, int width, int height)
attribute_deprecated int avpicture_alloc(AVPicture *picture, enum AVPixelFormat pix_fmt, int width, int height)
attribute_deprecated int avpicture_get_size(enum AVPixelFormat pix_fmt, int width, int height)
attribute_deprecated int av_picture_crop(AVPicture *dst, const AVPicture *src, enum AVPixelFormat pix_fmt, int top_band, int left_band)
struct AVDictionary AVDictionary
Definition: dict.h:86
AVMediaType
Definition: avutil.h:199
AVSampleFormat
Audio sample formats.
Definition: samplefmt.h:58
static enum AVPixelFormat hw_pix_fmt
Definition: hw_decode.c:46
AVHWDeviceType
Definition: hwcontext.h:27
swscale version macros
pixel format definitions
AVChromaLocation
Location of chroma samples.
Definition: pixfmt.h:541
AVColorRange
MPEG vs JPEG YUV range.
Definition: pixfmt.h:519
AVPixelFormat
Pixel format.
Definition: pixfmt.h:64
AVColorPrimaries
Chromaticity coordinates of the source primaries.
Definition: pixfmt.h:443
AVColorTransferCharacteristic
Color Transfer Characteristic.
Definition: pixfmt.h:467
AVColorSpace
YUV colorspace type.
Definition: pixfmt.h:496
Utilties for rational number calculation.
The bitstream filter state.
Definition: avcodec.h:5763
AVBSFInternal * internal
Opaque libavcodec internal data.
Definition: avcodec.h:5778
AVRational time_base_out
The timebase used for the timestamps of the output packets.
Definition: avcodec.h:5809
void * priv_data
Opaque filter-specific private data.
Definition: avcodec.h:5784
AVCodecParameters * par_in
Parameters of the input stream.
Definition: avcodec.h:5791
const AVClass * av_class
A class for logging and AVOptions.
Definition: avcodec.h:5767
AVCodecParameters * par_out
Parameters of the output stream.
Definition: avcodec.h:5797
AVRational time_base_in
The timebase used for the timestamps of the input packets.
Definition: avcodec.h:5803
const struct AVBitStreamFilter * filter
The bitstream filter this context is an instance of.
Definition: avcodec.h:5772
const struct AVBitStreamFilter * filter
Definition: avcodec.h:5740
char * args
Internal default arguments, used if NULL is passed to av_bitstream_filter_filter().
Definition: avcodec.h:5747
struct AVBitStreamFilterContext * next
Definition: avcodec.h:5742
AVCodecParserContext * parser
Definition: avcodec.h:5741
void(* flush)(AVBSFContext *ctx)
Definition: avcodec.h:5845
int(* filter)(AVBSFContext *ctx, AVPacket *pkt)
Definition: avcodec.h:5843
const AVClass * priv_class
A class for the private data, used to declare bitstream filter private AVOptions.
Definition: avcodec.h:5831
const char * name
Definition: avcodec.h:5813
enum AVCodecID * codec_ids
A list of codec ids supported by the filter, terminated by AV_CODEC_ID_NONE.
Definition: avcodec.h:5820
int(* init)(AVBSFContext *ctx)
Definition: avcodec.h:5842
void(* close)(AVBSFContext *ctx)
Definition: avcodec.h:5844
A reference to a data buffer.
Definition: buffer.h:81
This structure describes the bitrate properties of an encoded bitstream.
Definition: avcodec.h:1128
int avg_bitrate
Average bitrate of the stream, in bits per second.
Definition: avcodec.h:1152
uint64_t vbv_delay
The delay between the time the packet this structure is associated with is received and the time when...
Definition: avcodec.h:1170
int min_bitrate
Minimum bitrate of the stream, in bits per second.
Definition: avcodec.h:1143
int buffer_size
The size of the buffer to which the ratecontrol is applied, in bits.
Definition: avcodec.h:1161
int max_bitrate
Maximum bitrate of the stream, in bits per second.
Definition: avcodec.h:1134
Describe the class of an AVClass context structure.
Definition: log.h:67
main external API structure.
Definition: avcodec.h:1565
attribute_deprecated int brd_scale
Definition: avcodec.h:2138
int nsse_weight
noise vs.
Definition: avcodec.h:2891
float rc_max_available_vbv_use
Ratecontrol attempt to use, at maximum, of what can be used without an underflow.
Definition: avcodec.h:2457
int skip_top
Number of macroblock rows at the top which are skipped.
Definition: avcodec.h:2098
int trellis
trellis RD quantization
Definition: avcodec.h:2514
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1775
attribute_deprecated int pre_me
Definition: avcodec.h:2005
int64_t pts_correction_last_dts
PTS of the last frame.
Definition: avcodec.h:3145
int max_qdiff
maximum quantizer difference between frames
Definition: avcodec.h:2421
uint16_t * chroma_intra_matrix
custom intra quantization matrix
Definition: avcodec.h:3204
const AVCodecDescriptor * codec_descriptor
AVCodecDescriptor.
Definition: avcodec.h:3126
int hwaccel_flags
Bit set of AV_HWACCEL_FLAG_* flags, which affect hardware accelerated decoding (if active).
Definition: avcodec.h:3323
attribute_deprecated int min_prediction_order
Definition: avcodec.h:2519
int subtitle_header_size
Definition: avcodec.h:3051
int width
picture width / height.
Definition: avcodec.h:1738
AVPacketSideData * coded_side_data
Additional data associated with the entire coded stream.
Definition: avcodec.h:3237
int64_t pts_correction_num_faulty_dts
Number of incorrect PTS values so far.
Definition: avcodec.h:3143
attribute_deprecated int i_count
Definition: avcodec.h:2566
char * stats_out
pass1 encoding statistics output buffer
Definition: avcodec.h:2584
int rc_buffer_size
decoder bitstream buffer size
Definition: avcodec.h:2428
attribute_deprecated int header_bits
Definition: avcodec.h:2560
int64_t pts_correction_last_pts
Number of incorrect DTS values so far.
Definition: avcodec.h:3144
attribute_deprecated int refcounted_frames
If non-zero, the decoded audio and video frames returned from avcodec_decode_video2() and avcodec_dec...
Definition: avcodec.h:2396
int me_cmp
motion estimation comparison function
Definition: avcodec.h:1951
int flags2
AV_CODEC_FLAG2_*.
Definition: avcodec.h:1652
enum AVSampleFormat sample_fmt
audio sample format
Definition: avcodec.h:2233
int debug
debug
Definition: avcodec.h:2650
enum AVPixelFormat sw_pix_fmt
Nominal unaccelerated pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:3112
int global_quality
Global quality for codecs which cannot change it per frame.
Definition: avcodec.h:1631
int64_t max_pixels
The number of pixels per image to maximally accept.
Definition: avcodec.h:3292
attribute_deprecated int coder_type
Definition: avcodec.h:2482
attribute_deprecated int scenechange_threshold
Definition: avcodec.h:2079
enum AVColorRange color_range
MPEG vs JPEG YUV range.
Definition: avcodec.h:2200
char * sub_charenc
DTS of the last frame.
Definition: avcodec.h:3152
int error_concealment
error concealment flags
Definition: avcodec.h:2640
int dct_algo
DCT algorithm, see FF_DCT_* below.
Definition: avcodec.h:2755
unsigned int codec_tag
fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
Definition: avcodec.h:1590
int slice_flags
slice flags
Definition: avcodec.h:2043
int strict_std_compliance
strictly follow the standard (MPEG-4, ...).
Definition: avcodec.h:2628
float b_quant_offset
qscale offset between IP and B-frames
Definition: avcodec.h:1847
int nb_coded_side_data
Definition: avcodec.h:3238
AVRational pkt_timebase
Timebase in which pkt_dts/pts and AVPacket.dts/pts are.
Definition: avcodec.h:3119
attribute_deprecated int frame_bits
Definition: avcodec.h:2576
attribute_deprecated int chromaoffset
Definition: avcodec.h:2158
attribute_deprecated int mv_bits
Definition: avcodec.h:2558
enum AVPixelFormat(* get_format)(struct AVCodecContext *s, const enum AVPixelFormat *fmt)
callback to negotiate the pixelFormat
Definition: avcodec.h:1817
enum AVAudioServiceType audio_service_type
Type of service that the audio stream conveys.
Definition: avcodec.h:2290
enum AVColorPrimaries color_primaries
Chromaticity coordinates of the source primaries.
Definition: avcodec.h:2179
int me_subpel_quality
subpel ME quality
Definition: avcodec.h:2027
AVBufferRef * hw_frames_ctx
A reference to the AVHWFramesContext describing the input (for encoding) or output (decoding) frames.
Definition: avcodec.h:3262
int max_b_frames
maximum number of B-frames between non-B-frames Note: The output will be delayed by max_b_frames+1 re...
Definition: avcodec.h:1825
int mb_lmax
maximum MB Lagrange multiplier
Definition: avcodec.h:2119
int qmin
minimum quantizer
Definition: avcodec.h:2407
int keyint_min
minimum GOP size
Definition: avcodec.h:2146
enum AVMediaType codec_type
Definition: avcodec.h:1573
float b_quant_factor
qscale factor between IP and B-frames If > 0 then the last P-frame quantizer will be used (q= lastp_q...
Definition: avcodec.h:1834
int dia_size
ME diamond size & shape.
Definition: avcodec.h:1993
int workaround_bugs
Work around bugs in encoders which sometimes cannot be detected automatically.
Definition: avcodec.h:2599
attribute_deprecated int b_sensitivity
Definition: avcodec.h:2171
int apply_cropping
Video decoding only.
Definition: avcodec.h:3350
AVRational framerate
Definition: avcodec.h:3105
int bidir_refine
Definition: avcodec.h:2133
char * stats_in
pass2 encoding statistics input buffer Concatenated stuff from stats_out of pass1 should be placed he...
Definition: avcodec.h:2592
AVRational sample_aspect_ratio
sample aspect ratio (0 if unknown) That is the width of a pixel divided by the height of the pixel.
Definition: avcodec.h:1944
int bits_per_coded_sample
bits per sample/pixel from the demuxer (needed for huffyuv).
Definition: avcodec.h:2789
int rc_override_count
ratecontrol override, see RcOverride
Definition: avcodec.h:2435
uint8_t * dump_separator
dump format separator.
Definition: avcodec.h:3212
attribute_deprecated AVFrame * coded_frame
the picture in the bitstream
Definition: avcodec.h:2815
int slice_count
slice count
Definition: avcodec.h:1919
attribute_deprecated int max_prediction_order
Definition: avcodec.h:2523
int thread_safe_callbacks
Set by the client if its custom get_buffer() callback can be called synchronously from another thread...
Definition: avcodec.h:2853
int ticks_per_frame
For some codecs, the time base is closer to the field rate than the frame rate.
Definition: avcodec.h:1697
enum AVFieldOrder field_order
Field order.
Definition: avcodec.h:2222
uint16_t * inter_matrix
custom inter quantization matrix Must be allocated with the av_malloc() family of functions,...
Definition: avcodec.h:2074
const struct AVHWAccel * hwaccel
Hardware accelerator in use.
Definition: avcodec.h:2729
int active_thread_type
Which multithreading methods are in use by the codec.
Definition: avcodec.h:2843
int sub_charenc_mode
Subtitles character encoding mode.
Definition: avcodec.h:3160
int64_t reordered_opaque
opaque 64-bit number (generally a PTS) that will be reordered and output in AVFrame....
Definition: avcodec.h:2722
int bit_rate_tolerance
number of bits the bitstream is allowed to diverge from the reference.
Definition: avcodec.h:1623
int mb_decision
macroblock decision mode
Definition: avcodec.h:2053
attribute_deprecated int misc_bits
Definition: avcodec.h:2572
int has_b_frames
Size of the frame reordering buffer in the decoder.
Definition: avcodec.h:1855
char * codec_whitelist
',' separated list of allowed decoders.
Definition: avcodec.h:3220
int level
level
Definition: avcodec.h:3018
void(* draw_horiz_band)(struct AVCodecContext *s, const AVFrame *src, int offset[AV_NUM_DATA_POINTERS], int y, int type, int height)
If non NULL, 'draw_horiz_band' is called by the libavcodec decoder to draw a horizontal band.
Definition: avcodec.h:1800
attribute_deprecated int frame_skip_threshold
Definition: avcodec.h:2494
int64_t bit_rate
the average bitrate
Definition: avcodec.h:1615
enum AVDiscard skip_loop_filter
Skip loop filtering for selected frames.
Definition: avcodec.h:3026
int64_t pts_correction_num_faulty_pts
Current statistics for PTS correction.
Definition: avcodec.h:3142
const struct AVCodec * codec
Definition: avcodec.h:1574
int rc_initial_buffer_occupancy
Number of bits which should be loaded into the rc buffer before decoding starts.
Definition: avcodec.h:2471
int thread_type
Which multithreading methods to use.
Definition: avcodec.h:2834
attribute_deprecated int frame_skip_cmp
Definition: avcodec.h:2506
int me_sub_cmp
subpixel motion estimation comparison function
Definition: avcodec.h:1957
attribute_deprecated int p_count
Definition: avcodec.h:2568
int profile
profile
Definition: avcodec.h:2898
unsigned properties
Properties of the stream that gets decoded.
Definition: avcodec.h:3227
int last_predictor_count
amount of previous MV predictors (2a+1 x 2a+1 square)
Definition: avcodec.h:2000
int log_level_offset
Definition: avcodec.h:1571
int(* execute)(struct AVCodecContext *c, int(*func)(struct AVCodecContext *c2, void *arg), void *arg2, int *ret, int count, int size)
The codec may call this to execute several independent things.
Definition: avcodec.h:2864
int bits_per_raw_sample
Bits per sample/pixel of internal libavcodec pixel/sample format.
Definition: avcodec.h:2796
int idct_algo
IDCT algorithm, see FF_IDCT_* below.
Definition: avcodec.h:2768
enum AVColorSpace colorspace
YUV colorspace type.
Definition: avcodec.h:2193
int sub_text_format
Control the form of AVSubtitle.rects[N]->ass.
Definition: avcodec.h:3269
enum AVSampleFormat request_sample_fmt
desired sample format
Definition: avcodec.h:2298
attribute_deprecated int mpeg_quant
Definition: avcodec.h:1860
int initial_padding
Audio only.
Definition: avcodec.h:3096
float temporal_cplx_masking
temporary complexity masking (0-> disabled)
Definition: avcodec.h:1891
int sample_rate
samples per second
Definition: avcodec.h:2225
const AVClass * av_class
information on struct for av_log
Definition: avcodec.h:1570
float p_masking
p block masking (0-> disabled)
Definition: avcodec.h:1905
int delay
Codec delay.
Definition: avcodec.h:1721
float dark_masking
darkness masking (0-> disabled)
Definition: avcodec.h:1912
attribute_deprecated int64_t timecode_frame_start
Definition: avcodec.h:2527
int mb_cmp
macroblock comparison function (not supported yet)
Definition: avcodec.h:1963
int gop_size
the number of pictures in a group of pictures, or 0 for intra_only
Definition: avcodec.h:1760
uint64_t request_channel_layout
Request decoder to use this channel layout if it can (0 for default)
Definition: avcodec.h:2283
int frame_number
Frame counter, set by libavcodec.
Definition: avcodec.h:2256
attribute_deprecated int rtp_payload_size
Definition: avcodec.h:2547
int skip_alpha
Skip processing alpha if supported by codec.
Definition: avcodec.h:3178
int refs
number of reference frames
Definition: avcodec.h:2153
int ildct_cmp
interlaced DCT comparison function
Definition: avcodec.h:1969
int mv0_threshold
Note: Value depends upon the compare function used for fullpel ME.
Definition: avcodec.h:2166
int mb_lmin
minimum MB Lagrange multiplier
Definition: avcodec.h:2112
int64_t rc_max_rate
maximum bitrate
Definition: avcodec.h:2443
int compression_level
Definition: avcodec.h:1637
int discard_damaged_percentage
The percentage of damaged samples to discard a frame.
Definition: avcodec.h:3372
attribute_deprecated int me_penalty_compensation
Definition: avcodec.h:2126
int thread_count
thread count is used to decide how many independent tasks should be passed to execute()
Definition: avcodec.h:2824
void * opaque
Private data of the user, can be used to carry app specific stuff.
Definition: avcodec.h:1607
int qmax
maximum quantizer
Definition: avcodec.h:2414
void * hwaccel_context
Hardware accelerator context.
Definition: avcodec.h:2741
uint16_t * intra_matrix
custom intra quantization matrix Must be allocated with the av_malloc() family of functions,...
Definition: avcodec.h:2065
int coded_height
Definition: avcodec.h:1753
enum AVColorTransferCharacteristic color_trc
Color Transfer Characteristic.
Definition: avcodec.h:2186
float rc_min_vbv_overflow_use
Ratecontrol attempt to use, at least, times the amount needed to prevent a vbv overflow.
Definition: avcodec.h:2464
uint8_t * subtitle_header
Header containing style information for text subtitles.
Definition: avcodec.h:3050
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented.
Definition: avcodec.h:1688
attribute_deprecated int i_tex_bits
Definition: avcodec.h:2562
int flags
AV_CODEC_FLAG_*.
Definition: avcodec.h:1645
int seek_preroll
Number of samples to skip after a discontinuity.
Definition: avcodec.h:3185
attribute_deprecated int frame_skip_exp
Definition: avcodec.h:2502
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:1666
int me_pre_cmp
motion estimation prepass comparison function
Definition: avcodec.h:2013
attribute_deprecated int prediction_method
Definition: avcodec.h:1924
int channels
number of audio channels
Definition: avcodec.h:2226
int64_t rc_min_rate
minimum bitrate
Definition: avcodec.h:2450
int trailing_padding
Audio only.
Definition: avcodec.h:3284
enum AVDiscard skip_idct
Skip IDCT/dequantization for selected frames.
Definition: avcodec.h:3033
int intra_dc_precision
precision of the intra DC coefficient - 8
Definition: avcodec.h:2091
enum AVChromaLocation chroma_sample_location
This defines the location of chroma samples.
Definition: avcodec.h:2207
int(* execute2)(struct AVCodecContext *c, int(*func)(struct AVCodecContext *c2, void *arg, int jobnr, int threadnr), void *arg2, int *ret, int count)
The codec may call this to execute several independent things.
Definition: avcodec.h:2884
uint64_t error[AV_NUM_DATA_POINTERS]
error
Definition: avcodec.h:2748
attribute_deprecated int p_tex_bits
Definition: avcodec.h:2564
attribute_deprecated int context_model
Definition: avcodec.h:2488
float qcompress
amount of qscale change between easy & hard scenes (0.0-1.0)
Definition: avcodec.h:2399
float qblur
amount of qscale smoothing over time (0.0-1.0)
Definition: avcodec.h:2400
AVBufferRef * hw_device_ctx
A reference to the AVHWDeviceContext describing the device which will be used by a hardware encoder/d...
Definition: avcodec.h:3314
int me_range
maximum motion estimation search range in subpel units If 0 then no limit.
Definition: avcodec.h:2036
attribute_deprecated int noise_reduction
Definition: avcodec.h:2083
int extra_hw_frames
Definition: avcodec.h:3364
attribute_deprecated int side_data_only_packets
Encoding only and set by default.
Definition: avcodec.h:3078
attribute_deprecated int skip_count
Definition: avcodec.h:2570
int debug_mv
debug motion vectors
Definition: avcodec.h:3193
RcOverride * rc_override
Definition: avcodec.h:2436
enum AVCodecID codec_id
Definition: avcodec.h:1575
attribute_deprecated int b_frame_strategy
Definition: avcodec.h:1839
int pre_dia_size
ME prepass diamond size & shape.
Definition: avcodec.h:2020
float lumi_masking
luminance masking (0-> disabled)
Definition: avcodec.h:1884
int extradata_size
Definition: avcodec.h:1667
int cutoff
Audio cutoff bandwidth (0 means "automatic")
Definition: avcodec.h:2269
int skip_bottom
Number of macroblock rows at the bottom which are skipped.
Definition: avcodec.h:2105
int coded_width
Bitstream width / height, may be different from width/height e.g.
Definition: avcodec.h:1753
int block_align
number of bytes per packet if constant and known or 0 Used by some WAV based audio codecs.
Definition: avcodec.h:2262
attribute_deprecated void(* rtp_callback)(struct AVCodecContext *avctx, void *data, int size, int mb_nb)
Definition: avcodec.h:2541
attribute_deprecated int frame_skip_factor
Definition: avcodec.h:2498
attribute_deprecated uint64_t vbv_delay
VBV delay coded in the last frame (in periods of a 27 MHz clock).
Definition: avcodec.h:3063
uint64_t channel_layout
Audio channel layout.
Definition: avcodec.h:2276
int frame_size
Number of samples per channel in an audio frame.
Definition: avcodec.h:2245
int * slice_offset
slice offsets in the frame in bytes
Definition: avcodec.h:1935
float i_quant_factor
qscale factor between P- and I-frames If > 0 then the last P-frame quantizer will be used (q = lastp_...
Definition: avcodec.h:1870
int(* get_buffer2)(struct AVCodecContext *s, AVFrame *frame, int flags)
This callback is called at the beginning of each frame to get data buffer(s) for it.
Definition: avcodec.h:2380
struct AVCodecInternal * internal
Private context used for internal data.
Definition: avcodec.h:1600
int lowres
low resolution decoding, 1-> 1/2 size, 2->1/4 size
Definition: avcodec.h:2804
void * priv_data
Definition: avcodec.h:1592
float spatial_cplx_masking
spatial complexity masking (0-> disabled)
Definition: avcodec.h:1898
enum AVDiscard skip_frame
Skip decoding for selected frames.
Definition: avcodec.h:3040
int err_recognition
Error recognition; may misdetect some more or less valid parts as errors.
Definition: avcodec.h:2694
float i_quant_offset
qscale offset between P and I-frames
Definition: avcodec.h:1877
int slices
Number of slices.
Definition: avcodec.h:2216
This struct describes the properties of a single codec described by an AVCodecID.
Definition: avcodec.h:716
const char *const * mime_types
MIME type(s) associated with the codec.
Definition: avcodec.h:738
const char * long_name
A more descriptive name for this codec.
Definition: avcodec.h:728
const struct AVProfile * profiles
If non-NULL, an array of profiles recognized for this codec.
Definition: avcodec.h:743
const char * name
Name of the codec described by this descriptor.
Definition: avcodec.h:724
int props
Codec properties, a combination of AV_CODEC_PROP_* flags.
Definition: avcodec.h:732
enum AVCodecID id
Definition: avcodec.h:717
enum AVMediaType type
Definition: avcodec.h:718
enum AVHWDeviceType device_type
The device type associated with the configuration.
Definition: avcodec.h:3471
int methods
Bit set of AV_CODEC_HW_CONFIG_METHOD_* flags, describing the possible setup methods which can be used...
Definition: avcodec.h:3464
enum AVPixelFormat pix_fmt
A hardware pixel format which the codec can use.
Definition: avcodec.h:3459
This struct describes the properties of an encoded stream.
Definition: avcodec.h:3949
enum AVColorSpace color_space
Definition: avcodec.h:4046
int extradata_size
Size of the extradata content in bytes.
Definition: avcodec.h:3975
int frame_size
Audio only.
Definition: avcodec.h:4078
enum AVFieldOrder field_order
Video only.
Definition: avcodec.h:4038
uint64_t channel_layout
Audio only.
Definition: avcodec.h:4059
int bits_per_coded_sample
The number of bits per sample in the codedwords.
Definition: avcodec.h:3999
int channels
Audio only.
Definition: avcodec.h:4063
int width
Video only.
Definition: avcodec.h:4023
int64_t bit_rate
The average bitrate of the encoded data (in bits per second).
Definition: avcodec.h:3986
int seek_preroll
Audio only.
Definition: avcodec.h:4097
enum AVMediaType codec_type
General type of the encoded data.
Definition: avcodec.h:3953
int trailing_padding
Audio only.
Definition: avcodec.h:4093
int profile
Codec-specific bitstream restrictions that the stream conforms to.
Definition: avcodec.h:4017
int block_align
Audio only.
Definition: avcodec.h:4074
int bits_per_raw_sample
This is the number of valid bits in each output sample.
Definition: avcodec.h:4012
AVRational sample_aspect_ratio
Video only.
Definition: avcodec.h:4033
int video_delay
Video only.
Definition: avcodec.h:4052
uint32_t codec_tag
Additional information about the codec (corresponds to the AVI FOURCC).
Definition: avcodec.h:3961
uint8_t * extradata
Extra binary data needed for initializing the decoder, codec-dependent.
Definition: avcodec.h:3971
enum AVCodecID codec_id
Specific type of the encoded data (the codec used).
Definition: avcodec.h:3957
enum AVColorPrimaries color_primaries
Definition: avcodec.h:4044
int sample_rate
Audio only.
Definition: avcodec.h:4067
enum AVColorTransferCharacteristic color_trc
Definition: avcodec.h:4045
int initial_padding
Audio only.
Definition: avcodec.h:4086
enum AVChromaLocation chroma_location
Definition: avcodec.h:4047
enum AVColorRange color_range
Video only.
Definition: avcodec.h:4043
int duration
Duration of the current frame.
Definition: avcodec.h:5230
int dts_ref_dts_delta
Offset of the current timestamp against last timestamp sync point in units of AVCodecContext....
Definition: avcodec.h:5192
int64_t cur_frame_end[AV_PARSER_PTS_NB]
Definition: avcodec.h:5149
int width
Dimensions of the decoded video intended for presentation.
Definition: avcodec.h:5255
enum AVFieldOrder field_order
Definition: avcodec.h:5232
struct AVCodecParser * parser
Definition: avcodec.h:5110
int64_t pos
Byte position of currently parsed frame in stream.
Definition: avcodec.h:5218
int format
The format of the coded data, corresponds to enum AVPixelFormat for video and for enum AVSampleFormat...
Definition: avcodec.h:5272
int repeat_pict
This field is used for proper frame duration computation in lavf.
Definition: avcodec.h:5126
enum AVPictureStructure picture_structure
Indicate whether a picture is coded as a frame, top field or bottom field.
Definition: avcodec.h:5242
int64_t cur_frame_dts[AV_PARSER_PTS_NB]
Definition: avcodec.h:5139
int64_t cur_frame_pos[AV_PARSER_PTS_NB]
Position of the packet in file.
Definition: avcodec.h:5213
attribute_deprecated int64_t convergence_duration
Definition: avcodec.h:5164
int output_picture_number
Picture number incremented in presentation or output order.
Definition: avcodec.h:5250
int pts_dts_delta
Presentation delay of current frame in units of AVCodecContext.time_base.
Definition: avcodec.h:5206
int64_t next_frame_offset
Definition: avcodec.h:5114
int64_t cur_frame_pts[AV_PARSER_PTS_NB]
Definition: avcodec.h:5138
int64_t cur_frame_offset[AV_PARSER_PTS_NB]
Definition: avcodec.h:5137
int key_frame
Set by parser to 1 for key frames and 0 for non-key frames.
Definition: avcodec.h:5157
int64_t frame_offset
Definition: avcodec.h:5111
int64_t last_pos
Previous frame byte position.
Definition: avcodec.h:5223
int coded_width
Dimensions of the coded video.
Definition: avcodec.h:5261
int64_t offset
byte offset from starting packet start
Definition: avcodec.h:5148
int dts_sync_point
Synchronization point for start of timestamp generation.
Definition: avcodec.h:5177
int codec_ids[5]
Definition: avcodec.h:5276
int priv_data_size
Definition: avcodec.h:5277
int(* split)(AVCodecContext *avctx, const uint8_t *buf, int buf_size)
Definition: avcodec.h:5286
void(* parser_close)(AVCodecParserContext *s)
Definition: avcodec.h:5285
int(* parser_parse)(AVCodecParserContext *s, AVCodecContext *avctx, const uint8_t **poutbuf, int *poutbuf_size, const uint8_t *buf, int buf_size)
Definition: avcodec.h:5281
int(* parser_init)(AVCodecParserContext *s)
Definition: avcodec.h:5278
struct AVCodecParser * next
Definition: avcodec.h:5287
AVCodec.
Definition: avcodec.h:3481
enum AVCodecID id
Definition: avcodec.h:3495
int(* send_frame)(AVCodecContext *avctx, const AVFrame *frame)
Encode API with decoupled packet/frame dataflow.
Definition: avcodec.h:3589
const AVCodecDefault * defaults
Private codec-specific defaults.
Definition: avcodec.h:3554
int(* receive_packet)(AVCodecContext *avctx, AVPacket *avpkt)
Definition: avcodec.h:3590
const uint64_t * channel_layouts
array of support channel layouts, or NULL if unknown. array is terminated by 0
Definition: avcodec.h:3505
int(* update_thread_context)(AVCodecContext *dst, const AVCodecContext *src)
Copy necessary context variables from a previous thread context to the current one.
Definition: avcodec.h:3548
int(* decode)(AVCodecContext *, void *outdata, int *outdata_size, AVPacket *avpkt)
Definition: avcodec.h:3579
int caps_internal
Internal codec capabilities.
Definition: avcodec.h:3607
int(* receive_frame)(AVCodecContext *avctx, AVFrame *frame)
Decode API with decoupled packet/frame dataflow.
Definition: avcodec.h:3597
const char * bsfs
Decoding only, a comma-separated list of bitstream filters to apply to packets before decoding.
Definition: avcodec.h:3613
void(* init_static_data)(struct AVCodec *codec)
Initialize codec static data, called from avcodec_register().
Definition: avcodec.h:3562
const AVClass * priv_class
AVClass for the private context.
Definition: avcodec.h:3507
const AVRational * supported_framerates
array of supported framerates, or NULL if any, array is terminated by {0,0}
Definition: avcodec.h:3501
int(* encode_sub)(AVCodecContext *, uint8_t *buf, int buf_size, const struct AVSubtitle *sub)
Definition: avcodec.h:3565
void(* flush)(AVCodecContext *)
Flush buffers.
Definition: avcodec.h:3602
int(* init)(AVCodecContext *)
Definition: avcodec.h:3564
int(* close)(AVCodecContext *)
Definition: avcodec.h:3580
int(* init_thread_copy)(AVCodecContext *)
If defined, called on thread contexts when they are created.
Definition: avcodec.h:3540
const struct AVCodecHWConfigInternal ** hw_configs
Array of pointers to hardware configurations supported by the codec, or NULL if no hardware supported...
Definition: avcodec.h:3622
int priv_data_size
Definition: avcodec.h:3529
enum AVSampleFormat * sample_fmts
array of supported sample formats, or NULL if unknown, array is terminated by -1
Definition: avcodec.h:3504
struct AVCodec * next
Definition: avcodec.h:3530
enum AVMediaType type
Definition: avcodec.h:3494
enum AVPixelFormat * pix_fmts
array of supported pixel formats, or NULL if unknown, array is terminated by -1
Definition: avcodec.h:3502
int(* encode2)(AVCodecContext *avctx, AVPacket *avpkt, const AVFrame *frame, int *got_packet_ptr)
Encode data to an AVPacket.
Definition: avcodec.h:3577
const AVProfile * profiles
array of recognized profiles, or NULL if unknown, array is terminated by {FF_PROFILE_UNKNOWN}
Definition: avcodec.h:3508
const char * long_name
Descriptive name for the codec, meant to be more human readable than name.
Definition: avcodec.h:3493
const char * wrapper_name
Group name of the codec implementation.
Definition: avcodec.h:3520
const char * name
Name of the codec implementation.
Definition: avcodec.h:3488
const int * supported_samplerates
array of supported audio samplerates, or NULL if unknown, array is terminated by 0
Definition: avcodec.h:3503
int capabilities
Codec capabilities.
Definition: avcodec.h:3500
uint8_t max_lowres
maximum value for lowres supported by the decoder
Definition: avcodec.h:3506
This structure describes decoded (raw) audio or video data.
Definition: frame.h:295
int priv_data_size
Size of the private data to allocate in AVCodecInternal.hwaccel_priv_data.
Definition: avcodec.h:3793
int(* alloc_frame)(AVCodecContext *avctx, AVFrame *frame)
Allocate a custom buffer.
Definition: avcodec.h:3695
int(* uninit)(AVCodecContext *avctx)
Uninitialize the hwaccel private data.
Definition: avcodec.h:3787
enum AVCodecID id
Codec implemented by the hardware accelerator.
Definition: avcodec.h:3669
int(* start_frame)(AVCodecContext *avctx, const uint8_t *buf, uint32_t buf_size)
Called at the beginning of each frame or field picture.
Definition: avcodec.h:3711
void(* decode_mb)(struct MpegEncContext *s)
Called for every Macroblock in a slice.
Definition: avcodec.h:3770
int(* init)(AVCodecContext *avctx)
Initialize the hwaccel private data.
Definition: avcodec.h:3779
const char * name
Name of the hardware accelerated codec.
Definition: avcodec.h:3655
int capabilities
Hardware accelerated codec capabilities.
Definition: avcodec.h:3682
int(* decode_slice)(AVCodecContext *avctx, const uint8_t *buf, uint32_t buf_size)
Callback for each slice.
Definition: avcodec.h:3739
int(* frame_params)(AVCodecContext *avctx, AVBufferRef *hw_frames_ctx)
Fill the given hw_frames context with current codec parameters.
Definition: avcodec.h:3808
int(* decode_params)(AVCodecContext *avctx, int type, const uint8_t *buf, uint32_t buf_size)
Callback for parameter data (SPS/PPS/VPS etc).
Definition: avcodec.h:3725
enum AVPixelFormat pix_fmt
Supported pixel format.
Definition: avcodec.h:3676
int caps_internal
Internal hwaccel capabilities.
Definition: avcodec.h:3798
int(* end_frame)(AVCodecContext *avctx)
Called at the end of each frame or field picture.
Definition: avcodec.h:3750
int frame_priv_data_size
Size of per-frame hardware accelerator private data.
Definition: avcodec.h:3759
enum AVMediaType type
Type of codec implemented by the hardware accelerator.
Definition: avcodec.h:3662
uint8_t * data
Definition: avcodec.h:1421
enum AVPacketSideDataType type
Definition: avcodec.h:1423
This structure stores compressed data.
Definition: avcodec.h:1454
attribute_deprecated int64_t convergence_duration
Definition: avcodec.h:1506
int stream_index
Definition: avcodec.h:1479
AVBufferRef * buf
A reference to the reference-counted buffer where the packet data is stored.
Definition: avcodec.h:1460
int flags
A combination of AV_PKT_FLAG values.
Definition: avcodec.h:1483
int size
Definition: avcodec.h:1478
int64_t duration
Duration of this packet in AVStream->time_base units, 0 if unknown.
Definition: avcodec.h:1495
int64_t pts
Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...
Definition: avcodec.h:1470
int64_t dts
Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed.
Definition: avcodec.h:1476
uint8_t * data
Definition: avcodec.h:1477
int64_t pos
byte position in stream, -1 if unknown
Definition: avcodec.h:1497
AVPacketSideData * side_data
Additional packet data that can be provided by the container.
Definition: avcodec.h:1488
int side_data_elems
Definition: avcodec.h:1489
Pan Scan area.
Definition: avcodec.h:1099
int id
id
Definition: avcodec.h:1105
int width
width and height in 1/16 pel
Definition: avcodec.h:1112
int height
Definition: avcodec.h:1113
int16_t position[3][2]
position of the top left corner in 1/16 pel for up to 3 fields/frames
Definition: avcodec.h:1120
Picture data structure.
Definition: avcodec.h:3866
attribute_deprecated uint8_t * data[AV_NUM_DATA_POINTERS]
pointers to the image data planes
Definition: avcodec.h:3868
attribute_deprecated int linesize[AV_NUM_DATA_POINTERS]
number of bytes per line
Definition: avcodec.h:3870
AVProfile.
Definition: avcodec.h:3414
int profile
Definition: avcodec.h:3415
const char * name
short name for the profile
Definition: avcodec.h:3416
Rational number (pair of numerator and denominator).
Definition: rational.h:58
int x
top left corner of pict, undefined when pict is not set
Definition: avcodec.h:3899
char * ass
0 terminated ASS/SSA compatible event line.
Definition: avcodec.h:3928
int w
width of pict, undefined when pict is not set
Definition: avcodec.h:3901
attribute_deprecated AVPicture pict
Definition: avcodec.h:3910
int nb_colors
number of colors in pict, undefined when pict is not set
Definition: avcodec.h:3903
char * text
0 terminated plain UTF-8 text
Definition: avcodec.h:3921
uint8_t * data[4]
data+linesize for the bitmap of this subtitle.
Definition: avcodec.h:3916
int y
top left corner of pict, undefined when pict is not set
Definition: avcodec.h:3900
enum AVSubtitleType type
Definition: avcodec.h:3919
int linesize[4]
Definition: avcodec.h:3917
int h
height of pict, undefined when pict is not set
Definition: avcodec.h:3902
uint16_t format
Definition: avcodec.h:3934
uint32_t start_display_time
Definition: avcodec.h:3935
uint32_t end_display_time
Definition: avcodec.h:3936
unsigned num_rects
Definition: avcodec.h:3937
AVSubtitleRect ** rects
Definition: avcodec.h:3938
int64_t pts
Same as packet pts, in AV_TIME_BASE.
Definition: avcodec.h:3939
int qscale
Definition: avcodec.h:833
int start_frame
Definition: avcodec.h:831
int end_frame
Definition: avcodec.h:832
float quality_factor
Definition: avcodec.h:834
static int64_t pts