SDL 2.0
edid.h File Reference
+ This graph shows which files directly or indirectly include this file:

Go to the source code of this file.

Data Structures

struct  Timing
 
struct  DetailedTiming
 
struct  MonitorInfo
 

Typedefs

typedef unsigned char uchar
 

Enumerations

enum  Interface {
  UNDEFINED ,
  DVI ,
  HDMI_A ,
  HDMI_B ,
  MDDI ,
  DISPLAY_PORT
}
 
enum  ColorType {
  UNDEFINED_COLOR ,
  MONOCHROME ,
  RGB ,
  OTHER_COLOR
}
 
enum  StereoType {
  NO_STEREO ,
  FIELD_RIGHT ,
  FIELD_LEFT ,
  TWO_WAY_RIGHT_ON_EVEN ,
  TWO_WAY_LEFT_ON_EVEN ,
  FOUR_WAY_INTERLEAVED ,
  SIDE_BY_SIDE
}
 

Functions

MonitorInfodecode_edid (const uchar *data)
 
void dump_monitor_info (MonitorInfo *info)
 
char * make_display_name (const char *output_name, const MonitorInfo *info)
 

Typedef Documentation

◆ uchar

typedef unsigned char uchar

Definition at line 1 of file edid.h.

Enumeration Type Documentation

◆ ColorType

enum ColorType
Enumerator
UNDEFINED_COLOR 
MONOCHROME 
RGB 
OTHER_COLOR 

Definition at line 16 of file edid.h.

17{
20 RGB,
22} ColorType;
ColorType
Definition: edid.h:17
@ RGB
Definition: edid.h:20
@ OTHER_COLOR
Definition: edid.h:21
@ MONOCHROME
Definition: edid.h:19
@ UNDEFINED_COLOR
Definition: edid.h:18

◆ Interface

enum Interface
Enumerator
UNDEFINED 
DVI 
HDMI_A 
HDMI_B 
MDDI 
DISPLAY_PORT 

Definition at line 6 of file edid.h.

7{
9 DVI,
10 HDMI_A,
11 HDMI_B,
12 MDDI,
14} Interface;
Interface
Definition: edid.h:7
@ DVI
Definition: edid.h:9
@ DISPLAY_PORT
Definition: edid.h:13
@ UNDEFINED
Definition: edid.h:8
@ HDMI_B
Definition: edid.h:11
@ HDMI_A
Definition: edid.h:10
@ MDDI
Definition: edid.h:12

◆ StereoType

enum StereoType
Enumerator
NO_STEREO 
FIELD_RIGHT 
FIELD_LEFT 
TWO_WAY_RIGHT_ON_EVEN 
TWO_WAY_LEFT_ON_EVEN 
FOUR_WAY_INTERLEAVED 
SIDE_BY_SIDE 

Definition at line 24 of file edid.h.

25{
StereoType
Definition: edid.h:25
@ FIELD_LEFT
Definition: edid.h:28
@ TWO_WAY_LEFT_ON_EVEN
Definition: edid.h:30
@ FIELD_RIGHT
Definition: edid.h:27
@ FOUR_WAY_INTERLEAVED
Definition: edid.h:31
@ TWO_WAY_RIGHT_ON_EVEN
Definition: edid.h:29
@ NO_STEREO
Definition: edid.h:26
@ SIDE_BY_SIDE
Definition: edid.h:32

Function Documentation

◆ decode_edid()

MonitorInfo * decode_edid ( const uchar data)

Definition at line 523 of file edid-parse.c.

524{
525 MonitorInfo *info = calloc (1, sizeof (MonitorInfo));
526
527 decode_check_sum (edid, info);
528
529 if (!decode_header (edid) ||
531 !decode_edid_version (edid, info) ||
532 !decode_display_parameters (edid, info) ||
533 !decode_color_characteristics (edid, info) ||
534 !decode_established_timings (edid, info) ||
535 !decode_standard_timings (edid, info) ||
536 !decode_descriptors (edid, info)) {
537 free(info);
538 return NULL;
539 }
540
541 return info;
542}
SDL_EventEntry * free
Definition: SDL_events.c:82
#define NULL
Definition: begin_code.h:167
static void decode_check_sum(const uchar *edid, MonitorInfo *info)
Definition: edid-parse.c:510
static int decode_edid_version(const uchar *edid, MonitorInfo *info)
Definition: edid-parse.c:114
static int decode_display_parameters(const uchar *edid, MonitorInfo *info)
Definition: edid-parse.c:123
static int decode_vendor_and_product_identification(const uchar *edid, MonitorInfo *info)
Definition: edid-parse.c:59
static int decode_color_characteristics(const uchar *edid, MonitorInfo *info)
Definition: edid-parse.c:258
static int decode_descriptors(const uchar *edid, MonitorInfo *info)
Definition: edid-parse.c:482
static int decode_header(const uchar *edid)
Definition: edid-parse.c:51
static int decode_standard_timings(const uchar *edid, MonitorInfo *info)
Definition: edid-parse.c:326
static int decode_established_timings(const uchar *edid, MonitorInfo *info)
Definition: edid-parse.c:273

References decode_check_sum(), decode_color_characteristics(), decode_descriptors(), decode_display_parameters(), decode_edid_version(), decode_established_timings(), decode_header(), decode_standard_timings(), decode_vendor_and_product_identification(), free, and NULL.

◆ dump_monitor_info()

void dump_monitor_info ( MonitorInfo info)

Definition at line 551 of file edid-parse.c.

552{
553 int i;
554
555 printf ("Checksum: %d (%s)\n",
556 info->checksum, info->checksum? "incorrect" : "correct");
557 printf ("Manufacturer Code: %s\n", info->manufacturer_code);
558 printf ("Product Code: 0x%x\n", info->product_code);
559 printf ("Serial Number: %u\n", info->serial_number);
560
561 if (info->production_week != -1)
562 printf ("Production Week: %d\n", info->production_week);
563 else
564 printf ("Production Week: unspecified\n");
565
566 if (info->production_year != -1)
567 printf ("Production Year: %d\n", info->production_year);
568 else
569 printf ("Production Year: unspecified\n");
570
571 if (info->model_year != -1)
572 printf ("Model Year: %d\n", info->model_year);
573 else
574 printf ("Model Year: unspecified\n");
575
576 printf ("EDID revision: %d.%d\n", info->major_version, info->minor_version);
577
578 printf ("Display is %s\n", info->is_digital? "digital" : "analog");
579 if (info->is_digital)
580 {
581 const char *interface;
582 if (info->ad.digital.bits_per_primary != -1)
583 printf ("Bits Per Primary: %d\n", info->ad.digital.bits_per_primary);
584 else
585 printf ("Bits Per Primary: undefined\n");
586
587 switch (info->ad.digital.interface)
588 {
589 case DVI: interface = "DVI"; break;
590 case HDMI_A: interface = "HDMI-a"; break;
591 case HDMI_B: interface = "HDMI-b"; break;
592 case MDDI: interface = "MDDI"; break;
593 case DISPLAY_PORT: interface = "DisplayPort"; break;
594 case UNDEFINED: interface = "undefined"; break;
595 default: interface = "unknown"; break;
596 }
597 printf ("Interface: %s\n", interface);
598
599 printf ("RGB 4:4:4: %s\n", yesno (info->ad.digital.rgb444));
600 printf ("YCrCb 4:4:4: %s\n", yesno (info->ad.digital.ycrcb444));
601 printf ("YCrCb 4:2:2: %s\n", yesno (info->ad.digital.ycrcb422));
602 }
603 else
604 {
605 const char *s;
606 printf ("Video Signal Level: %f\n", info->ad.analog.video_signal_level);
607 printf ("Sync Signal Level: %f\n", info->ad.analog.sync_signal_level);
608 printf ("Total Signal Level: %f\n", info->ad.analog.total_signal_level);
609
610 printf ("Blank to Black: %s\n",
611 yesno (info->ad.analog.blank_to_black));
612 printf ("Separate HV Sync: %s\n",
614 printf ("Composite Sync on H: %s\n",
616 printf ("Serration on VSync: %s\n",
618
619 switch (info->ad.analog.color_type)
620 {
621 case UNDEFINED_COLOR: s = "undefined"; break;
622 case MONOCHROME: s = "monochrome"; break;
623 case RGB: s = "rgb"; break;
624 case OTHER_COLOR: s = "other color"; break;
625 default: s = "unknown"; break;
626 };
627
628 printf ("Color: %s\n", s);
629 }
630
631 if (info->width_mm == -1)
632 printf ("Width: undefined\n");
633 else
634 printf ("Width: %d mm\n", info->width_mm);
635
636 if (info->height_mm == -1)
637 printf ("Height: undefined\n");
638 else
639 printf ("Height: %d mm\n", info->height_mm);
640
641 if (info->aspect_ratio > 0)
642 printf ("Aspect Ratio: %f\n", info->aspect_ratio);
643 else
644 printf ("Aspect Ratio: undefined\n");
645
646 if (info->gamma >= 0)
647 printf ("Gamma: %f\n", info->gamma);
648 else
649 printf ("Gamma: undefined\n");
650
651 printf ("Standby: %s\n", yesno (info->standby));
652 printf ("Suspend: %s\n", yesno (info->suspend));
653 printf ("Active Off: %s\n", yesno (info->active_off));
654
655 printf ("SRGB is Standard: %s\n", yesno (info->srgb_is_standard));
656 printf ("Preferred Timing Includes Native: %s\n",
658 printf ("Continuous Frequency: %s\n", yesno (info->continuous_frequency));
659
660 printf ("Red X: %f\n", info->red_x);
661 printf ("Red Y: %f\n", info->red_y);
662 printf ("Green X: %f\n", info->green_x);
663 printf ("Green Y: %f\n", info->green_y);
664 printf ("Blue X: %f\n", info->blue_x);
665 printf ("Blue Y: %f\n", info->blue_y);
666 printf ("White X: %f\n", info->white_x);
667 printf ("White Y: %f\n", info->white_y);
668
669 printf ("Established Timings:\n");
670
671 for (i = 0; i < 24; ++i)
672 {
673 Timing *timing = &(info->established[i]);
674
675 if (timing->frequency == 0)
676 break;
677
678 printf (" %d x %d @ %d Hz\n",
679 timing->width, timing->height, timing->frequency);
680
681 }
682
683 printf ("Standard Timings:\n");
684 for (i = 0; i < 8; ++i)
685 {
686 Timing *timing = &(info->standard[i]);
687
688 if (timing->frequency == 0)
689 break;
690
691 printf (" %d x %d @ %d Hz\n",
692 timing->width, timing->height, timing->frequency);
693 }
694
695 for (i = 0; i < info->n_detailed_timings; ++i)
696 {
697 DetailedTiming *timing = &(info->detailed_timings[i]);
698 const char *s;
699
700 printf ("Timing%s: \n",
701 (i == 0 && info->preferred_timing_includes_native)?
702 " (Preferred)" : "");
703 printf (" Pixel Clock: %d\n", timing->pixel_clock);
704 printf (" H Addressable: %d\n", timing->h_addr);
705 printf (" H Blank: %d\n", timing->h_blank);
706 printf (" H Front Porch: %d\n", timing->h_front_porch);
707 printf (" H Sync: %d\n", timing->h_sync);
708 printf (" V Addressable: %d\n", timing->v_addr);
709 printf (" V Blank: %d\n", timing->v_blank);
710 printf (" V Front Porch: %d\n", timing->v_front_porch);
711 printf (" V Sync: %d\n", timing->v_sync);
712 printf (" Width: %d mm\n", timing->width_mm);
713 printf (" Height: %d mm\n", timing->height_mm);
714 printf (" Right Border: %d\n", timing->right_border);
715 printf (" Top Border: %d\n", timing->top_border);
716 switch (timing->stereo)
717 {
718 default:
719 case NO_STEREO: s = "No Stereo"; break;
720 case FIELD_RIGHT: s = "Field Sequential, Right on Sync"; break;
721 case FIELD_LEFT: s = "Field Sequential, Left on Sync"; break;
722 case TWO_WAY_RIGHT_ON_EVEN: s = "Two-way, Right on Even"; break;
723 case TWO_WAY_LEFT_ON_EVEN: s = "Two-way, Left on Even"; break;
724 case FOUR_WAY_INTERLEAVED: s = "Four-way Interleaved"; break;
725 case SIDE_BY_SIDE: s = "Side-by-Side"; break;
726 }
727 printf (" Stereo: %s\n", s);
728
729 if (timing->digital_sync)
730 {
731 printf (" Digital Sync:\n");
732 printf (" composite: %s\n", yesno (timing->ad.digital.composite));
733 printf (" serrations: %s\n", yesno (timing->ad.digital.serrations));
734 printf (" negative vsync: %s\n",
735 yesno (timing->ad.digital.negative_vsync));
736 printf (" negative hsync: %s\n",
737 yesno (timing->ad.digital.negative_hsync));
738 }
739 else
740 {
741 printf (" Analog Sync:\n");
742 printf (" bipolar: %s\n", yesno (timing->ad.analog.bipolar));
743 printf (" serrations: %s\n", yesno (timing->ad.analog.serrations));
744 printf (" sync on green: %s\n", yesno (
745 timing->ad.analog.sync_on_green));
746 }
747 }
748
749 printf ("Detailed Product information:\n");
750 printf (" Product Name: %s\n", info->dsc_product_name);
751 printf (" Serial Number: %s\n", info->dsc_serial_number);
752 printf (" Unspecified String: %s\n", info->dsc_string);
753}
GLdouble s
Definition: SDL_opengl.h:2063
GLboolean GLboolean GLboolean b
GLboolean GLboolean GLboolean GLboolean a
return Display return Display Bool Bool int int int return Display XEvent Bool(*) XPointer return Display return Display Drawable _Xconst char unsigned int unsigned int return Display Pixmap Pixmap XColor XColor unsigned int unsigned int return Display _Xconst char char int char return Display Visual unsigned int int int char unsigned int unsigned int in i)
Definition: SDL_x11sym.h:50
static const char * yesno(int v)
Definition: edid-parse.c:545
int negative_hsync
Definition: edid.h:75
int v_front_porch
Definition: edid.h:52
int h_front_porch
Definition: edid.h:48
int h_blank
Definition: edid.h:46
int negative_vsync
Definition: edid.h:74
int composite
Definition: edid.h:72
int top_border
Definition: edid.h:56
StereoType stereo
Definition: edid.h:58
int sync_on_green
Definition: edid.h:67
struct DetailedTiming::@274::@275 analog
int h_addr
Definition: edid.h:45
int v_sync
Definition: edid.h:51
int serrations
Definition: edid.h:66
int right_border
Definition: edid.h:55
int width_mm
Definition: edid.h:53
int h_sync
Definition: edid.h:47
int v_blank
Definition: edid.h:50
int pixel_clock
Definition: edid.h:44
int digital_sync
Definition: edid.h:60
int v_addr
Definition: edid.h:49
int bipolar
Definition: edid.h:65
struct DetailedTiming::@274::@276 digital
union DetailedTiming::@274 ad
int height_mm
Definition: edid.h:54
int serration_on_vsync
Definition: edid.h:118
int separate_hv_sync
Definition: edid.h:115
double blue_x
Definition: edid.h:141
int continuous_frequency
Definition: edid.h:135
int product_code
Definition: edid.h:84
int minor_version
Definition: edid.h:92
char manufacturer_code[4]
Definition: edid.h:83
int bits_per_primary
Definition: edid.h:100
int n_detailed_timings
Definition: edid.h:149
int srgb_is_standard
Definition: edid.h:133
Timing standard[8]
Definition: edid.h:147
double green_x
Definition: edid.h:139
struct MonitorInfo::@277::@279 analog
char dsc_product_name[14]
Definition: edid.h:160
int suspend
Definition: edid.h:130
int width_mm
Definition: edid.h:123
struct MonitorInfo::@277::@278 digital
int rgb444
Definition: edid.h:102
Timing established[24]
Definition: edid.h:146
int active_off
Definition: edid.h:131
Interface interface
Definition: edid.h:101
union MonitorInfo::@277 ad
char dsc_serial_number[14]
Definition: edid.h:159
double aspect_ratio
Definition: edid.h:125
ColorType color_type
Definition: edid.h:119
int height_mm
Definition: edid.h:124
double white_y
Definition: edid.h:144
int is_digital
Definition: edid.h:94
double green_y
Definition: edid.h:140
int composite_sync_on_h
Definition: edid.h:116
double red_y
Definition: edid.h:138
double total_signal_level
Definition: edid.h:111
double gamma
Definition: edid.h:127
int production_year
Definition: edid.h:88
int ycrcb422
Definition: edid.h:104
unsigned int serial_number
Definition: edid.h:85
DetailedTiming detailed_timings[4]
Definition: edid.h:150
int standby
Definition: edid.h:129
int major_version
Definition: edid.h:91
double sync_signal_level
Definition: edid.h:110
int preferred_timing_includes_native
Definition: edid.h:134
int checksum
Definition: edid.h:82
double video_signal_level
Definition: edid.h:109
int ycrcb444
Definition: edid.h:103
int model_year
Definition: edid.h:89
int production_week
Definition: edid.h:87
char dsc_string[14]
Definition: edid.h:161
double white_x
Definition: edid.h:143
double red_x
Definition: edid.h:137
double blue_y
Definition: edid.h:142
int blank_to_black
Definition: edid.h:113
Definition: edid.h:36
int frequency
Definition: edid.h:39
int width
Definition: edid.h:37
int height
Definition: edid.h:38

References MonitorInfo::active_off, DetailedTiming::ad, MonitorInfo::ad, DetailedTiming::analog, MonitorInfo::analog, MonitorInfo::aspect_ratio, DetailedTiming::bipolar, MonitorInfo::bits_per_primary, MonitorInfo::blank_to_black, MonitorInfo::blue_x, MonitorInfo::blue_y, MonitorInfo::checksum, MonitorInfo::color_type, DetailedTiming::composite, MonitorInfo::composite_sync_on_h, MonitorInfo::continuous_frequency, MonitorInfo::detailed_timings, DetailedTiming::digital, MonitorInfo::digital, DetailedTiming::digital_sync, DISPLAY_PORT, MonitorInfo::dsc_product_name, MonitorInfo::dsc_serial_number, MonitorInfo::dsc_string, DVI, MonitorInfo::established, FIELD_LEFT, FIELD_RIGHT, FOUR_WAY_INTERLEAVED, Timing::frequency, MonitorInfo::gamma, MonitorInfo::green_x, MonitorInfo::green_y, DetailedTiming::h_addr, DetailedTiming::h_blank, DetailedTiming::h_front_porch, DetailedTiming::h_sync, HDMI_A, HDMI_B, Timing::height, DetailedTiming::height_mm, MonitorInfo::height_mm, i, MonitorInfo::interface, MonitorInfo::is_digital, MonitorInfo::major_version, MonitorInfo::manufacturer_code, MDDI, MonitorInfo::minor_version, MonitorInfo::model_year, MONOCHROME, MonitorInfo::n_detailed_timings, DetailedTiming::negative_hsync, DetailedTiming::negative_vsync, NO_STEREO, OTHER_COLOR, DetailedTiming::pixel_clock, MonitorInfo::preferred_timing_includes_native, MonitorInfo::product_code, MonitorInfo::production_week, MonitorInfo::production_year, MonitorInfo::red_x, MonitorInfo::red_y, RGB, MonitorInfo::rgb444, DetailedTiming::right_border, MonitorInfo::separate_hv_sync, MonitorInfo::serial_number, MonitorInfo::serration_on_vsync, DetailedTiming::serrations, SIDE_BY_SIDE, MonitorInfo::srgb_is_standard, MonitorInfo::standard, MonitorInfo::standby, DetailedTiming::stereo, MonitorInfo::suspend, DetailedTiming::sync_on_green, MonitorInfo::sync_signal_level, DetailedTiming::top_border, MonitorInfo::total_signal_level, TWO_WAY_LEFT_ON_EVEN, TWO_WAY_RIGHT_ON_EVEN, UNDEFINED, UNDEFINED_COLOR, DetailedTiming::v_addr, DetailedTiming::v_blank, DetailedTiming::v_front_porch, DetailedTiming::v_sync, MonitorInfo::video_signal_level, MonitorInfo::white_x, MonitorInfo::white_y, Timing::width, DetailedTiming::width_mm, MonitorInfo::width_mm, MonitorInfo::ycrcb422, MonitorInfo::ycrcb444, and yesno().

◆ make_display_name()

char * make_display_name ( const char *  output_name,
const MonitorInfo info 
)