ALSA project - the C library reference
control.h
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1 
11 /*
12  * This library is free software; you can redistribute it and/or modify
13  * it under the terms of the GNU Lesser General Public License as
14  * published by the Free Software Foundation; either version 2.1 of
15  * the License, or (at your option) any later version.
16  *
17  * This program is distributed in the hope that it will be useful,
18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20  * GNU Lesser General Public License for more details.
21  *
22  * You should have received a copy of the GNU Lesser General Public
23  * License along with this library; if not, write to the Free Software
24  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
25  *
26  */
27 
28 #ifndef __ALSA_CONTROL_H
29 #define __ALSA_CONTROL_H
30 
31 #ifdef __cplusplus
32 extern "C" {
33 #endif
34 
43 #define SND_CONTROL_DLSYM_VERSION _dlsym_control_001
44 
46 typedef struct snd_aes_iec958 {
47  unsigned char status[24];
48  unsigned char subcode[147];
49  unsigned char pad;
50  unsigned char dig_subframe[4];
51 } snd_aes_iec958_t;
52 
54 typedef struct _snd_ctl_card_info snd_ctl_card_info_t;
55 
57 typedef struct _snd_ctl_elem_id snd_ctl_elem_id_t;
58 
60 typedef struct _snd_ctl_elem_list snd_ctl_elem_list_t;
61 
63 typedef struct _snd_ctl_elem_info snd_ctl_elem_info_t;
64 
66 typedef struct _snd_ctl_elem_value snd_ctl_elem_value_t;
67 
69 typedef struct _snd_ctl_event snd_ctl_event_t;
70 
72 typedef enum _snd_ctl_elem_type {
87  SND_CTL_ELEM_TYPE_LAST = SND_CTL_ELEM_TYPE_INTEGER64
88 } snd_ctl_elem_type_t;
89 
91 typedef enum _snd_ctl_elem_iface {
106  SND_CTL_ELEM_IFACE_LAST = SND_CTL_ELEM_IFACE_SEQUENCER
107 } snd_ctl_elem_iface_t;
108 
110 typedef enum _snd_ctl_event_type {
113  SND_CTL_EVENT_LAST = SND_CTL_EVENT_ELEM
114 }snd_ctl_event_type_t;
115 
118 #define SND_CTL_EVENT_MASK_REMOVE (~0U)
119 
120 #define SND_CTL_EVENT_MASK_VALUE (1<<0)
121 
122 #define SND_CTL_EVENT_MASK_INFO (1<<1)
123 
124 #define SND_CTL_EVENT_MASK_ADD (1<<2)
125 
126 #define SND_CTL_EVENT_MASK_TLV (1<<3)
127 
129 #define SND_CTL_NAME_NONE ""
130 
131 #define SND_CTL_NAME_PLAYBACK "Playback "
132 
133 #define SND_CTL_NAME_CAPTURE "Capture "
134 
136 #define SND_CTL_NAME_IEC958_NONE ""
137 
138 #define SND_CTL_NAME_IEC958_SWITCH "Switch"
139 
140 #define SND_CTL_NAME_IEC958_VOLUME "Volume"
141 
142 #define SND_CTL_NAME_IEC958_DEFAULT "Default"
143 
144 #define SND_CTL_NAME_IEC958_MASK "Mask"
145 
146 #define SND_CTL_NAME_IEC958_CON_MASK "Con Mask"
147 
148 #define SND_CTL_NAME_IEC958_PRO_MASK "Pro Mask"
149 
150 #define SND_CTL_NAME_IEC958_PCM_STREAM "PCM Stream"
151 
152 #define SND_CTL_NAME_IEC958(expl,direction,what) "IEC958 " expl SND_CTL_NAME_##direction SND_CTL_NAME_IEC958_##what
153 
155 #define SND_CTL_POWER_MASK 0xff00
156 
157 #define SND_CTL_POWER_D0 0x0000
158 
159 #define SND_CTL_POWER_D1 0x0100
160 
161 #define SND_CTL_POWER_D2 0x0200
162 
163 #define SND_CTL_POWER_D3 0x0300
164 
165 #define SND_CTL_POWER_D3hot (SND_CTL_POWER_D3|0x0000)
166 
167 #define SND_CTL_POWER_D3cold (SND_CTL_POWER_D3|0x0001)
168 
170 #define SND_CTL_TLVT_CONTAINER 0x0000
171 
172 #define SND_CTL_TLVT_DB_SCALE 0x0001
173 
174 #define SND_CTL_TLVT_DB_LINEAR 0x0002
175 
176 #define SND_CTL_TLVT_DB_RANGE 0x0003
177 
178 #define SND_CTL_TLVT_DB_MINMAX 0x0004
179 
180 #define SND_CTL_TLVT_DB_MINMAX_MUTE 0x0005
181 
183 #define SND_CTL_TLV_DB_GAIN_MUTE -9999999
184 
186 #define SND_CTL_TLVT_CHMAP_FIXED 0x00101
187 
188 #define SND_CTL_TLVT_CHMAP_VAR 0x00102
189 
190 #define SND_CTL_TLVT_CHMAP_PAIRED 0x00103
191 
193 typedef enum _snd_ctl_type {
202 } snd_ctl_type_t;
203 
205 #define SND_CTL_NONBLOCK 0x0001
206 
208 #define SND_CTL_ASYNC 0x0002
209 
211 #define SND_CTL_READONLY 0x0004
212 
214 typedef struct _snd_ctl snd_ctl_t;
215 
217 #define SND_SCTL_NOFREE 0x0001
218 
220 typedef struct _snd_sctl snd_sctl_t;
221 
222 int snd_card_load(int card);
223 int snd_card_next(int *card);
224 int snd_card_get_index(const char *name);
225 int snd_card_get_name(int card, char **name);
226 int snd_card_get_longname(int card, char **name);
227 
228 int snd_device_name_hint(int card, const char *iface, void ***hints);
229 int snd_device_name_free_hint(void **hints);
230 char *snd_device_name_get_hint(const void *hint, const char *id);
231 
232 int snd_ctl_open(snd_ctl_t **ctl, const char *name, int mode);
233 int snd_ctl_open_lconf(snd_ctl_t **ctl, const char *name, int mode, snd_config_t *lconf);
234 int snd_ctl_open_fallback(snd_ctl_t **ctl, snd_config_t *root, const char *name, const char *orig_name, int mode);
235 int snd_ctl_close(snd_ctl_t *ctl);
236 int snd_ctl_nonblock(snd_ctl_t *ctl, int nonblock);
237 static __inline__ int snd_ctl_abort(snd_ctl_t *ctl) { return snd_ctl_nonblock(ctl, 2); }
239  snd_async_callback_t callback, void *private_data);
242 int snd_ctl_poll_descriptors(snd_ctl_t *ctl, struct pollfd *pfds, unsigned int space);
243 int snd_ctl_poll_descriptors_revents(snd_ctl_t *ctl, struct pollfd *pfds, unsigned int nfds, unsigned short *revents);
244 int snd_ctl_subscribe_events(snd_ctl_t *ctl, int subscribe);
253  unsigned int *tlv, unsigned int tlv_size);
255  const unsigned int *tlv);
257  const unsigned int *tlv);
258 #ifdef __ALSA_HWDEP_H
259 int snd_ctl_hwdep_next_device(snd_ctl_t *ctl, int * device);
261 #endif
262 #ifdef __ALSA_PCM_H
263 int snd_ctl_pcm_next_device(snd_ctl_t *ctl, int *device);
264 int snd_ctl_pcm_info(snd_ctl_t *ctl, snd_pcm_info_t * info);
265 int snd_ctl_pcm_prefer_subdevice(snd_ctl_t *ctl, int subdev);
266 #endif
267 #ifdef __ALSA_RAWMIDI_H
268 int snd_ctl_rawmidi_next_device(snd_ctl_t *ctl, int * device);
270 int snd_ctl_rawmidi_prefer_subdevice(snd_ctl_t *ctl, int subdev);
271 #endif
272 int snd_ctl_set_power_state(snd_ctl_t *ctl, unsigned int state);
273 int snd_ctl_get_power_state(snd_ctl_t *ctl, unsigned int *state);
274 
275 int snd_ctl_read(snd_ctl_t *ctl, snd_ctl_event_t *event);
276 int snd_ctl_wait(snd_ctl_t *ctl, int timeout);
277 const char *snd_ctl_name(snd_ctl_t *ctl);
278 snd_ctl_type_t snd_ctl_type(snd_ctl_t *ctl);
279 
280 const char *snd_ctl_elem_type_name(snd_ctl_elem_type_t type);
281 const char *snd_ctl_elem_iface_name(snd_ctl_elem_iface_t iface);
282 const char *snd_ctl_event_type_name(snd_ctl_event_type_t type);
283 
284 unsigned int snd_ctl_event_elem_get_mask(const snd_ctl_event_t *obj);
285 unsigned int snd_ctl_event_elem_get_numid(const snd_ctl_event_t *obj);
287 snd_ctl_elem_iface_t snd_ctl_event_elem_get_interface(const snd_ctl_event_t *obj);
288 unsigned int snd_ctl_event_elem_get_device(const snd_ctl_event_t *obj);
289 unsigned int snd_ctl_event_elem_get_subdevice(const snd_ctl_event_t *obj);
290 const char *snd_ctl_event_elem_get_name(const snd_ctl_event_t *obj);
291 unsigned int snd_ctl_event_elem_get_index(const snd_ctl_event_t *obj);
292 
293 int snd_ctl_elem_list_alloc_space(snd_ctl_elem_list_t *obj, unsigned int entries);
295 
297 int snd_ctl_ascii_elem_id_parse(snd_ctl_elem_id_t *dst, const char *str);
300  snd_ctl_elem_info_t *info,
301  const char *value);
302 
303 size_t snd_ctl_elem_id_sizeof(void);
308 #define snd_ctl_elem_id_alloca(ptr) __snd_alloca(ptr, snd_ctl_elem_id)
313 unsigned int snd_ctl_elem_id_get_numid(const snd_ctl_elem_id_t *obj);
314 snd_ctl_elem_iface_t snd_ctl_elem_id_get_interface(const snd_ctl_elem_id_t *obj);
315 unsigned int snd_ctl_elem_id_get_device(const snd_ctl_elem_id_t *obj);
316 unsigned int snd_ctl_elem_id_get_subdevice(const snd_ctl_elem_id_t *obj);
317 const char *snd_ctl_elem_id_get_name(const snd_ctl_elem_id_t *obj);
318 unsigned int snd_ctl_elem_id_get_index(const snd_ctl_elem_id_t *obj);
319 void snd_ctl_elem_id_set_numid(snd_ctl_elem_id_t *obj, unsigned int val);
320 void snd_ctl_elem_id_set_interface(snd_ctl_elem_id_t *obj, snd_ctl_elem_iface_t val);
321 void snd_ctl_elem_id_set_device(snd_ctl_elem_id_t *obj, unsigned int val);
322 void snd_ctl_elem_id_set_subdevice(snd_ctl_elem_id_t *obj, unsigned int val);
323 void snd_ctl_elem_id_set_name(snd_ctl_elem_id_t *obj, const char *val);
324 void snd_ctl_elem_id_set_index(snd_ctl_elem_id_t *obj, unsigned int val);
325 
326 size_t snd_ctl_card_info_sizeof(void);
331 #define snd_ctl_card_info_alloca(ptr) __snd_alloca(ptr, snd_ctl_card_info)
337 const char *snd_ctl_card_info_get_id(const snd_ctl_card_info_t *obj);
338 const char *snd_ctl_card_info_get_driver(const snd_ctl_card_info_t *obj);
339 const char *snd_ctl_card_info_get_name(const snd_ctl_card_info_t *obj);
343 
344 size_t snd_ctl_event_sizeof(void);
349 #define snd_ctl_event_alloca(ptr) __snd_alloca(ptr, snd_ctl_event)
353 void snd_ctl_event_copy(snd_ctl_event_t *dst, const snd_ctl_event_t *src);
354 snd_ctl_event_type_t snd_ctl_event_get_type(const snd_ctl_event_t *obj);
355 
356 size_t snd_ctl_elem_list_sizeof(void);
361 #define snd_ctl_elem_list_alloca(ptr) __snd_alloca(ptr, snd_ctl_elem_list)
366 void snd_ctl_elem_list_set_offset(snd_ctl_elem_list_t *obj, unsigned int val);
367 unsigned int snd_ctl_elem_list_get_used(const snd_ctl_elem_list_t *obj);
368 unsigned int snd_ctl_elem_list_get_count(const snd_ctl_elem_list_t *obj);
369 void snd_ctl_elem_list_get_id(const snd_ctl_elem_list_t *obj, unsigned int idx, snd_ctl_elem_id_t *ptr);
370 unsigned int snd_ctl_elem_list_get_numid(const snd_ctl_elem_list_t *obj, unsigned int idx);
371 snd_ctl_elem_iface_t snd_ctl_elem_list_get_interface(const snd_ctl_elem_list_t *obj, unsigned int idx);
372 unsigned int snd_ctl_elem_list_get_device(const snd_ctl_elem_list_t *obj, unsigned int idx);
373 unsigned int snd_ctl_elem_list_get_subdevice(const snd_ctl_elem_list_t *obj, unsigned int idx);
374 const char *snd_ctl_elem_list_get_name(const snd_ctl_elem_list_t *obj, unsigned int idx);
375 unsigned int snd_ctl_elem_list_get_index(const snd_ctl_elem_list_t *obj, unsigned int idx);
376 
377 size_t snd_ctl_elem_info_sizeof(void);
382 #define snd_ctl_elem_info_alloca(ptr) __snd_alloca(ptr, snd_ctl_elem_info)
387 snd_ctl_elem_type_t snd_ctl_elem_info_get_type(const snd_ctl_elem_info_t *obj);
399 unsigned int snd_ctl_elem_info_get_count(const snd_ctl_elem_info_t *obj);
406 unsigned int snd_ctl_elem_info_get_items(const snd_ctl_elem_info_t *obj);
407 void snd_ctl_elem_info_set_item(snd_ctl_elem_info_t *obj, unsigned int val);
410 int snd_ctl_elem_info_get_dimension(const snd_ctl_elem_info_t *obj, unsigned int idx);
412  const int dimension[4]);
414 unsigned int snd_ctl_elem_info_get_numid(const snd_ctl_elem_info_t *obj);
415 snd_ctl_elem_iface_t snd_ctl_elem_info_get_interface(const snd_ctl_elem_info_t *obj);
416 unsigned int snd_ctl_elem_info_get_device(const snd_ctl_elem_info_t *obj);
418 const char *snd_ctl_elem_info_get_name(const snd_ctl_elem_info_t *obj);
419 unsigned int snd_ctl_elem_info_get_index(const snd_ctl_elem_info_t *obj);
421 void snd_ctl_elem_info_set_numid(snd_ctl_elem_info_t *obj, unsigned int val);
422 void snd_ctl_elem_info_set_interface(snd_ctl_elem_info_t *obj, snd_ctl_elem_iface_t val);
423 void snd_ctl_elem_info_set_device(snd_ctl_elem_info_t *obj, unsigned int val);
424 void snd_ctl_elem_info_set_subdevice(snd_ctl_elem_info_t *obj, unsigned int val);
425 void snd_ctl_elem_info_set_name(snd_ctl_elem_info_t *obj, const char *val);
426 void snd_ctl_elem_info_set_index(snd_ctl_elem_info_t *obj, unsigned int val);
427 
429  unsigned int element_count,
430  unsigned int member_count,
431  long min, long max, long step);
433  unsigned int element_count,
434  unsigned int member_count,
435  long long min, long long max,
436  long long step);
438  unsigned int element_count,
439  unsigned int member_count);
441  unsigned int element_count,
442  unsigned int member_count,
443  unsigned int items,
444  const char *const labels[]);
446  unsigned int element_count,
447  unsigned int member_count);
448 
449 int snd_ctl_elem_add_integer(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id, unsigned int count, long imin, long imax, long istep);
450 int snd_ctl_elem_add_integer64(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id, unsigned int count, long long imin, long long imax, long long istep);
451 int snd_ctl_elem_add_boolean(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id, unsigned int count);
452 int snd_ctl_elem_add_enumerated(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id, unsigned int count, unsigned int items, const char *const names[]);
455 
456 size_t snd_ctl_elem_value_sizeof(void);
461 #define snd_ctl_elem_value_alloca(ptr) __snd_alloca(ptr, snd_ctl_elem_value)
468 unsigned int snd_ctl_elem_value_get_numid(const snd_ctl_elem_value_t *obj);
469 snd_ctl_elem_iface_t snd_ctl_elem_value_get_interface(const snd_ctl_elem_value_t *obj);
470 unsigned int snd_ctl_elem_value_get_device(const snd_ctl_elem_value_t *obj);
472 const char *snd_ctl_elem_value_get_name(const snd_ctl_elem_value_t *obj);
473 unsigned int snd_ctl_elem_value_get_index(const snd_ctl_elem_value_t *obj);
475 void snd_ctl_elem_value_set_numid(snd_ctl_elem_value_t *obj, unsigned int val);
476 void snd_ctl_elem_value_set_interface(snd_ctl_elem_value_t *obj, snd_ctl_elem_iface_t val);
477 void snd_ctl_elem_value_set_device(snd_ctl_elem_value_t *obj, unsigned int val);
478 void snd_ctl_elem_value_set_subdevice(snd_ctl_elem_value_t *obj, unsigned int val);
479 void snd_ctl_elem_value_set_name(snd_ctl_elem_value_t *obj, const char *val);
480 void snd_ctl_elem_value_set_index(snd_ctl_elem_value_t *obj, unsigned int val);
481 int snd_ctl_elem_value_get_boolean(const snd_ctl_elem_value_t *obj, unsigned int idx);
482 long snd_ctl_elem_value_get_integer(const snd_ctl_elem_value_t *obj, unsigned int idx);
483 long long snd_ctl_elem_value_get_integer64(const snd_ctl_elem_value_t *obj, unsigned int idx);
484 unsigned int snd_ctl_elem_value_get_enumerated(const snd_ctl_elem_value_t *obj, unsigned int idx);
485 unsigned char snd_ctl_elem_value_get_byte(const snd_ctl_elem_value_t *obj, unsigned int idx);
486 void snd_ctl_elem_value_set_boolean(snd_ctl_elem_value_t *obj, unsigned int idx, long val);
487 void snd_ctl_elem_value_set_integer(snd_ctl_elem_value_t *obj, unsigned int idx, long val);
488 void snd_ctl_elem_value_set_integer64(snd_ctl_elem_value_t *obj, unsigned int idx, long long val);
489 void snd_ctl_elem_value_set_enumerated(snd_ctl_elem_value_t *obj, unsigned int idx, unsigned int val);
490 void snd_ctl_elem_value_set_byte(snd_ctl_elem_value_t *obj, unsigned int idx, unsigned char val);
491 void snd_ctl_elem_set_bytes(snd_ctl_elem_value_t *obj, void *data, size_t size);
492 const void * snd_ctl_elem_value_get_bytes(const snd_ctl_elem_value_t *obj);
493 void snd_ctl_elem_value_get_iec958(const snd_ctl_elem_value_t *obj, snd_aes_iec958_t *ptr);
494 void snd_ctl_elem_value_set_iec958(snd_ctl_elem_value_t *obj, const snd_aes_iec958_t *ptr);
495 
496 int snd_tlv_parse_dB_info(unsigned int *tlv, unsigned int tlv_size,
497  unsigned int **db_tlvp);
498 int snd_tlv_get_dB_range(unsigned int *tlv, long rangemin, long rangemax,
499  long *min, long *max);
500 int snd_tlv_convert_to_dB(unsigned int *tlv, long rangemin, long rangemax,
501  long volume, long *db_gain);
502 int snd_tlv_convert_from_dB(unsigned int *tlv, long rangemin, long rangemax,
503  long db_gain, long *value, int xdir);
505  long *min, long *max);
507  long volume, long *db_gain);
509  long db_gain, long *value, int xdir);
510 
520 typedef struct _snd_hctl_elem snd_hctl_elem_t;
521 
523 typedef struct _snd_hctl snd_hctl_t;
524 
531 typedef int (*snd_hctl_compare_t)(const snd_hctl_elem_t *e1,
532  const snd_hctl_elem_t *e2);
534  const snd_hctl_elem_t *c2);
542 typedef int (*snd_hctl_callback_t)(snd_hctl_t *hctl,
543  unsigned int mask,
544  snd_hctl_elem_t *elem);
552  unsigned int mask);
553 
554 int snd_hctl_open(snd_hctl_t **hctl, const char *name, int mode);
555 int snd_hctl_open_ctl(snd_hctl_t **hctlp, snd_ctl_t *ctl);
556 int snd_hctl_close(snd_hctl_t *hctl);
557 int snd_hctl_nonblock(snd_hctl_t *hctl, int nonblock);
558 static __inline__ int snd_hctl_abort(snd_hctl_t *hctl) { return snd_hctl_nonblock(hctl, 2); }
560 int snd_hctl_poll_descriptors(snd_hctl_t *hctl, struct pollfd *pfds, unsigned int space);
561 int snd_hctl_poll_descriptors_revents(snd_hctl_t *ctl, struct pollfd *pfds, unsigned int nfds, unsigned short *revents);
562 unsigned int snd_hctl_get_count(snd_hctl_t *hctl);
568 void snd_hctl_set_callback_private(snd_hctl_t *hctl, void *data);
570 int snd_hctl_load(snd_hctl_t *hctl);
571 int snd_hctl_free(snd_hctl_t *hctl);
573 const char *snd_hctl_name(snd_hctl_t *hctl);
574 int snd_hctl_wait(snd_hctl_t *hctl, int timeout);
576 
582 int snd_hctl_elem_tlv_read(snd_hctl_elem_t *elem, unsigned int *tlv, unsigned int tlv_size);
583 int snd_hctl_elem_tlv_write(snd_hctl_elem_t *elem, const unsigned int *tlv);
584 int snd_hctl_elem_tlv_command(snd_hctl_elem_t *elem, const unsigned int *tlv);
585 
587 
589 unsigned int snd_hctl_elem_get_numid(const snd_hctl_elem_t *obj);
590 snd_ctl_elem_iface_t snd_hctl_elem_get_interface(const snd_hctl_elem_t *obj);
591 unsigned int snd_hctl_elem_get_device(const snd_hctl_elem_t *obj);
592 unsigned int snd_hctl_elem_get_subdevice(const snd_hctl_elem_t *obj);
593 const char *snd_hctl_elem_get_name(const snd_hctl_elem_t *obj);
594 unsigned int snd_hctl_elem_get_index(const snd_hctl_elem_t *obj);
598 
610 int snd_sctl_build(snd_sctl_t **ctl, snd_ctl_t *handle, snd_config_t *config,
611  snd_config_t *private_data, int mode);
612 int snd_sctl_free(snd_sctl_t *handle);
613 int snd_sctl_install(snd_sctl_t *handle);
614 int snd_sctl_remove(snd_sctl_t *handle);
615 
618 #ifdef __cplusplus
619 }
620 #endif
621 
622 #endif /* __ALSA_CONTROL_H */
snd_ctl_elem_write
int snd_ctl_elem_write(snd_ctl_t *ctl, snd_ctl_elem_value_t *data)
Set CTL element value.
Definition: control.c:884
snd_sctl_remove
int snd_sctl_remove(snd_sctl_t *handle)
Remove (restore) previous values from control elements.
Definition: setup.c:181
snd_ctl_add_integer_elem_set
int snd_ctl_add_integer_elem_set(snd_ctl_t *ctl, snd_ctl_elem_info_t *info, unsigned int element_count, unsigned int member_count, long min, long max, long step)
Create and add some user-defined control elements of integer type.
Definition: control.c:378
snd_ctl_elem_id_sizeof
size_t snd_ctl_elem_id_sizeof(void)
get size of snd_ctl_elem_id_t
Definition: control.c:1646
snd_card_next
int snd_card_next(int *card)
Try to determine the next card.
Definition: cards.c:98
snd_ctl_elem_info_free
void snd_ctl_elem_info_free(snd_ctl_elem_info_t *obj)
frees a previously allocated snd_ctl_elem_info_t
Definition: control.c:2221
snd_ctl_convert_from_dB
int snd_ctl_convert_from_dB(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id, long db_gain, long *value, int xdir)
Convert from dB gain to the raw volume value on the given control element.
Definition: tlv.c:492
snd_hctl_elem_get_id
void snd_hctl_elem_get_id(const snd_hctl_elem_t *obj, snd_ctl_elem_id_t *ptr)
Get CTL element identifier of a CTL element id/value.
Definition: hcontrol.c:909
snd_ctl_elem_value_get_byte
unsigned char snd_ctl_elem_value_get_byte(const snd_ctl_elem_value_t *obj, unsigned int idx)
Get value of a specified member from given data as an element of bytes type.
Definition: control.c:3041
snd_ctl_elem_value_get_iec958
void snd_ctl_elem_value_get_iec958(const snd_ctl_elem_value_t *obj, snd_aes_iec958_t *ptr)
Get value from given data to given pointer as an element of IEC958 type.
Definition: control.c:3148
snd_ctl_elem_tlv_read
int snd_ctl_elem_tlv_read(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id, unsigned int *tlv, unsigned int tlv_size)
Read structured data from an element set to given buffer.
Definition: control.c:933
snd_ctl_card_info_copy
void snd_ctl_card_info_copy(snd_ctl_card_info_t *dst, const snd_ctl_card_info_t *src)
copy one snd_ctl_card_info_t to another
Definition: control.c:1872
snd_hctl_poll_descriptors_count
int snd_hctl_poll_descriptors_count(snd_hctl_t *hctl)
get count of poll descriptors for HCTL handle
Definition: hcontrol.c:168
SND_CTL_TYPE_HW
@ SND_CTL_TYPE_HW
Definition: control.h:195
snd_ctl_add_boolean_elem_set
int snd_ctl_add_boolean_elem_set(snd_ctl_t *ctl, snd_ctl_elem_info_t *info, unsigned int element_count, unsigned int member_count)
Create and add some user-defined control elements of boolean type.
Definition: control.c:554
snd_ctl_elem_info_is_user
int snd_ctl_elem_info_is_user(const snd_ctl_elem_info_t *obj)
Get info if it's a user element.
Definition: control.c:2328
snd_ctl_elem_info_set_dimension
int snd_ctl_elem_info_set_dimension(snd_ctl_elem_info_t *info, const int dimension[4])
Set width to a specified dimension level of given element information.
Definition: control.c:2580
snd_ctl_hwdep_next_device
int snd_ctl_hwdep_next_device(snd_ctl_t *ctl, int *device)
Get next hardware dependent device number.
Definition: control.c:1033
snd_ctl_elem_value_get_index
unsigned int snd_ctl_elem_value_get_index(const snd_ctl_elem_value_t *obj)
Get index part of element identifier from given data of an element.
Definition: control.c:2895
snd_aes_iec958
Definition: control.h:46
snd_hctl_ctl
snd_ctl_t * snd_hctl_ctl(snd_hctl_t *hctl)
Get a ctl handle associated to the given hctl handle.
Definition: hcontrol.c:724
snd_ctl_elem_info_is_readable
int snd_ctl_elem_info_is_readable(const snd_ctl_elem_info_t *obj)
Get info about readability from a CTL element id/info.
Definition: control.c:2262
snd_ctl_elem_value_get_subdevice
unsigned int snd_ctl_elem_value_get_subdevice(const snd_ctl_elem_value_t *obj)
Get subdevice part of element identifier from given data of an element.
Definition: control.c:2873
snd_hctl_open
int snd_hctl_open(snd_hctl_t **hctl, const char *name, int mode)
Opens an HCTL.
Definition: hcontrol.c:70
snd_ctl_elem_list_sizeof
size_t snd_ctl_elem_list_sizeof(void)
get size of snd_ctl_elem_list_t
Definition: control.c:2022
snd_ctl_card_info_t
struct _snd_ctl_card_info snd_ctl_card_info_t
Definition: control.h:54
SND_CTL_TYPE_SHM
@ SND_CTL_TYPE_SHM
Definition: control.h:197
snd_aes_iec958::pad
unsigned char pad
Definition: control.h:49
snd_ctl_elem_info_get_items
unsigned int snd_ctl_elem_info_get_items(const snd_ctl_elem_info_t *obj)
Get number of items available from a SND_CTL_ELEM_TYPE_ENUMERATED CTL element id/info.
Definition: control.c:2478
snd_ctl_elem_info_get_numid
unsigned int snd_ctl_elem_info_get_numid(const snd_ctl_elem_info_t *obj)
Get element numeric identifier of a CTL element id/info.
Definition: control.c:2618
snd_ctl_elem_value_free
void snd_ctl_elem_value_free(snd_ctl_elem_value_t *obj)
Frees a previously allocated data of an element.
Definition: control.c:2783
snd_ctl_elem_value_compare
int snd_ctl_elem_value_compare(snd_ctl_elem_value_t *left, const snd_ctl_elem_value_t *right)
Compare one data of an element to the other.
Definition: control.c:2815
snd_ctl_convert_to_dB
int snd_ctl_convert_to_dB(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id, long volume, long *db_gain)
Convert the volume value to dB on the given control element.
Definition: tlv.c:469
snd_ctl_elem_info_is_locked
int snd_ctl_elem_info_is_locked(const snd_ctl_elem_info_t *obj)
Get info whether an element is locked.
Definition: control.c:2306
snd_ctl_elem_info_set_id
void snd_ctl_elem_info_set_id(snd_ctl_elem_info_t *obj, const snd_ctl_elem_id_t *ptr)
Set CTL element identifier of a CTL element id/info.
Definition: control.c:2684
snd_ctl_event_copy
void snd_ctl_event_copy(snd_ctl_event_t *dst, const snd_ctl_event_t *src)
copy one snd_ctl_event_t to another
Definition: control.c:2001
snd_ctl_elem_id_get_subdevice
unsigned int snd_ctl_elem_id_get_subdevice(const snd_ctl_elem_id_t *obj)
Get subdevice part of a CTL element identifier.
Definition: control.c:1732
snd_hctl_elem_get_index
unsigned int snd_hctl_elem_get_index(const snd_hctl_elem_t *obj)
Get index part of CTL element identifier of a CTL element id/value.
Definition: hcontrol.c:975
snd_hctl_elem_set_callback
void snd_hctl_elem_set_callback(snd_hctl_elem_t *obj, snd_hctl_elem_callback_t val)
Set callback function for an HCTL element.
Definition: hcontrol.c:986
snd_ctl_elem_info_get_dimension
int snd_ctl_elem_info_get_dimension(const snd_ctl_elem_info_t *obj, unsigned int idx)
Get specified of dimension width for given element.
Definition: control.c:2548
_snd_ctl_type
_snd_ctl_type
Definition: control.h:193
snd_ctl_event_malloc
int snd_ctl_event_malloc(snd_ctl_event_t **ptr)
allocate an invalid snd_ctl_event_t using standard malloc
Definition: control.c:1969
snd_hctl_elem_info
int snd_hctl_elem_info(snd_hctl_elem_t *elem, snd_ctl_elem_info_t *info)
Get information for an HCTL element.
Definition: hcontrol.c:805
snd_ctl_elem_info_is_tlv_writable
int snd_ctl_elem_info_is_tlv_writable(const snd_ctl_elem_info_t *obj)
Get info about TLV writeability from a CTL element id/info.
Definition: control.c:2350
snd_ctl_elem_value_set_numid
void snd_ctl_elem_value_set_numid(snd_ctl_elem_value_t *obj, unsigned int val)
Set numeric identifier to given data of an element.
Definition: control.c:2917
snd_ctl_elem_id_clear
void snd_ctl_elem_id_clear(snd_ctl_elem_id_t *obj)
clear given snd_ctl_elem_id_t object
Definition: control.c:1678
_snd_ctl_elem_type
_snd_ctl_elem_type
Definition: control.h:72
snd_hctl_load
int snd_hctl_load(snd_hctl_t *hctl)
Load an HCTL with all elements and sort them.
Definition: hcontrol.c:565
snd_ctl_elem_tlv_write
int snd_ctl_elem_tlv_write(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id, const unsigned int *tlv)
Write structured data from given buffer to an element set.
Definition: control.c:970
snd_card_load
int snd_card_load(int card)
Try to load the driver for a card.
Definition: cards.c:83
snd_ctl_elem_list_get_count
unsigned int snd_ctl_elem_list_get_count(const snd_ctl_elem_list_t *obj)
Get total count of elements present in CTL device (information present in every filled CTL element id...
Definition: control.c:2097
snd_ctl_elem_info_get_device
unsigned int snd_ctl_elem_info_get_device(const snd_ctl_elem_info_t *obj)
Get device part of CTL element identifier of a CTL element id/info.
Definition: control.c:2640
snd_ctl_elem_info_get_type
snd_ctl_elem_type_t snd_ctl_elem_info_get_type(const snd_ctl_elem_info_t *obj)
Get type from a CTL element id/info.
Definition: control.c:2251
snd_ctl_elem_info_get_item_name
const char * snd_ctl_elem_info_get_item_name(const snd_ctl_elem_info_t *obj)
Get name for selected item in a SND_CTL_ELEM_TYPE_ENUMERATED CTL element id/info.
Definition: control.c:2501
snd_hctl_open_ctl
int snd_hctl_open_ctl(snd_hctl_t **hctlp, snd_ctl_t *ctl)
Opens an HCTL.
Definition: hcontrol.c:89
snd_ctl_event_elem_get_numid
unsigned int snd_ctl_event_elem_get_numid(const snd_ctl_event_t *obj)
Get element numeric identifier for an element related event.
Definition: control.c:1567
snd_ctl_elem_info_clear
void snd_ctl_elem_info_clear(snd_ctl_elem_info_t *obj)
clear given snd_ctl_elem_info_t object
Definition: control.c:2230
snd_ctl_elem_info_get_owner
pid_t snd_ctl_elem_info_get_owner(const snd_ctl_elem_info_t *obj)
Get owner of a locked element.
Definition: control.c:2384
snd_ctl_elem_id_set_numid
void snd_ctl_elem_id_set_numid(snd_ctl_elem_id_t *obj, unsigned int val)
Set numeric identifier for a CTL element identifier.
Definition: control.c:1765
snd_ctl_event_elem_get_name
const char * snd_ctl_event_elem_get_name(const snd_ctl_event_t *obj)
Get name part of CTL element identifier for an element related event.
Definition: control.c:1615
snd_ctl_event_get_type
snd_ctl_event_type_t snd_ctl_event_get_type(const snd_ctl_event_t *obj)
Get type of a CTL event.
Definition: control.c:2012
snd_ctl_elem_value_set_index
void snd_ctl_elem_value_set_index(snd_ctl_elem_value_t *obj, unsigned int val)
Set index part of element identifier to given data of an element.
Definition: control.c:2972
snd_ctl_nonblock
int snd_ctl_nonblock(snd_ctl_t *ctl, int nonblock)
set nonblock mode
Definition: control.c:152
snd_ctl_elem_unlock
int snd_ctl_elem_unlock(snd_ctl_t *ctl, snd_ctl_elem_id_t *id)
Unlock CTL element.
Definition: control.c:1021
snd_hctl_get_count
unsigned int snd_hctl_get_count(snd_hctl_t *hctl)
Get number of loaded elements for an HCTL.
Definition: hcontrol.c:662
SND_CTL_TYPE_INET
@ SND_CTL_TYPE_INET
Definition: control.h:199
snd_ctl_elem_value_set_boolean
void snd_ctl_elem_value_set_boolean(snd_ctl_elem_value_t *obj, unsigned int idx, long val)
Set value of a specified member to given data as an element of boolean type.
Definition: control.c:3055
snd_ctl_rawmidi_info
int snd_ctl_rawmidi_info(snd_ctl_t *ctl, snd_rawmidi_info_t *info)
Get info about a RawMidi device.
Definition: control.c:1105
snd_config_t
struct _snd_config snd_config_t
Internal structure for a configuration node object.
Definition: conf.h:69
snd_hctl_find_elem
snd_hctl_elem_t * snd_hctl_find_elem(snd_hctl_t *hctl, const snd_ctl_elem_id_t *id)
Search an HCTL element.
Definition: hcontrol.c:551
snd_ctl_elem_info_get_max
long snd_ctl_elem_info_get_max(const snd_ctl_elem_info_t *obj)
Get maximum value from a SND_CTL_ELEM_TYPE_INTEGER CTL element id/info.
Definition: control.c:2418
snd_ctl_elem_value_set_iec958
void snd_ctl_elem_value_set_iec958(snd_ctl_elem_value_t *obj, const snd_aes_iec958_t *ptr)
Set value from given pointer to given data as an element of IEC958 type.
Definition: control.c:3160
snd_ctl_elem_list_get_device
unsigned int snd_ctl_elem_list_get_device(const snd_ctl_elem_list_t *obj, unsigned int idx)
Get device part of CTL element identifier for an entry of a CTL element identifiers list.
Definition: control.c:2148
snd_ctl_elem_add_boolean
int snd_ctl_elem_add_boolean(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id, unsigned int count)
Create and add an user-defined control element of boolean type.
Definition: control.c:775
snd_ctl_elem_value_get_bytes
const void * snd_ctl_elem_value_get_bytes(const snd_ctl_elem_value_t *obj)
Get memory block from given data as an element of bytes type.
Definition: control.c:3136
snd_ctl_elem_tlv_command
int snd_ctl_elem_tlv_command(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id, const unsigned int *tlv)
Process structured data from given buffer for an element set.
Definition: control.c:995
snd_ctl_poll_descriptors
int snd_ctl_poll_descriptors(snd_ctl_t *ctl, struct pollfd *pfds, unsigned int space)
get poll descriptors
Definition: control.c:221
snd_ctl_pcm_next_device
int snd_ctl_pcm_next_device(snd_ctl_t *ctl, int *device)
Get next PCM device number.
Definition: control.c:1057
snd_ctl_elem_info_set_item
void snd_ctl_elem_info_set_item(snd_ctl_elem_info_t *obj, unsigned int val)
Select item in a SND_CTL_ELEM_TYPE_ENUMERATED CTL element id/info.
Definition: control.c:2490
snd_ctl_t
struct _snd_ctl snd_ctl_t
Definition: control.h:214
snd_aes_iec958::subcode
unsigned char subcode[147]
Definition: control.h:48
snd_sctl_build
int snd_sctl_build(snd_sctl_t **ctl, snd_ctl_t *handle, snd_config_t *config, snd_config_t *private_data, int mode)
Build setup control handle.
Definition: setup.c:603
snd_ctl_elem_value_get_integer
long snd_ctl_elem_value_get_integer(const snd_ctl_elem_value_t *obj, unsigned int idx)
Get value of a specified member from given data as an element of integer type.
Definition: control.c:2999
SND_CTL_ELEM_TYPE_IEC958
@ SND_CTL_ELEM_TYPE_IEC958
Definition: control.h:84
snd_ctl_elem_info_set_index
void snd_ctl_elem_info_set_index(snd_ctl_elem_info_t *obj, unsigned int val)
Set index part of CTL element identifier of a CTL element id/info.
Definition: control.c:2750
snd_hctl_elem_get_subdevice
unsigned int snd_hctl_elem_get_subdevice(const snd_hctl_elem_t *obj)
Get subdevice part of CTL element identifier of a CTL element id/value.
Definition: hcontrol.c:953
snd_ctl_elem_lock
int snd_ctl_elem_lock(snd_ctl_t *ctl, snd_ctl_elem_id_t *id)
Lock CTL element.
Definition: control.c:1009
snd_ctl_elem_value_get_device
unsigned int snd_ctl_elem_value_get_device(const snd_ctl_elem_value_t *obj)
Get device part of element identifier from given data of an element.
Definition: control.c:2861
snd_ctl_elem_value_get_interface
snd_ctl_elem_iface_t snd_ctl_elem_value_get_interface(const snd_ctl_elem_value_t *obj)
Get interface part of element identifier from given data of an element.
Definition: control.c:2850
snd_async_callback_t
void(* snd_async_callback_t)(snd_async_handler_t *handler)
Async notification callback.
Definition: global.h:121
snd_ctl_event_elem_get_id
void snd_ctl_event_elem_get_id(const snd_ctl_event_t *obj, snd_ctl_elem_id_t *ptr)
Get CTL element identifier for an element related event.
Definition: control.c:1555
snd_ctl_elem_id_get_interface
snd_ctl_elem_iface_t snd_ctl_elem_id_get_interface(const snd_ctl_elem_id_t *obj)
Get interface part of a CTL element identifier.
Definition: control.c:1710
snd_ctl_elem_value_t
struct _snd_ctl_elem_value snd_ctl_elem_value_t
Definition: control.h:66
snd_ctl_elem_value_get_id
void snd_ctl_elem_value_get_id(const snd_ctl_elem_value_t *obj, snd_ctl_elem_id_t *ptr)
Get element identifier from given data of an element.
Definition: control.c:2827
snd_ctl_pcm_prefer_subdevice
int snd_ctl_pcm_prefer_subdevice(snd_ctl_t *ctl, int subdev)
Set preferred PCM subdevice number of successive PCM open.
Definition: control.c:1081
snd_ctl_elem_info_get_min
long snd_ctl_elem_info_get_min(const snd_ctl_elem_info_t *obj)
Get minimum value from a SND_CTL_ELEM_TYPE_INTEGER CTL element id/info.
Definition: control.c:2406
snd_ctl_elem_info_get_step
long snd_ctl_elem_info_get_step(const snd_ctl_elem_info_t *obj)
Get value step from a SND_CTL_ELEM_TYPE_INTEGER CTL element id/info.
Definition: control.c:2430
snd_ctl_elem_info_get_interface
snd_ctl_elem_iface_t snd_ctl_elem_info_get_interface(const snd_ctl_elem_info_t *obj)
Get interface part of CTL element identifier of a CTL element id/info.
Definition: control.c:2629
snd_ctl_add_integer64_elem_set
int snd_ctl_add_integer64_elem_set(snd_ctl_t *ctl, snd_ctl_elem_info_t *info, unsigned int element_count, unsigned int member_count, long long min, long long max, long long step)
Create and add some user-defined control elements of integer64 type.
Definition: control.c:468
snd_hctl_elem_get_callback_private
void * snd_hctl_elem_get_callback_private(const snd_hctl_elem_t *obj)
Get callback private value for an HCTL element.
Definition: hcontrol.c:1008
snd_ctl_elem_id_t
struct _snd_ctl_elem_id snd_ctl_elem_id_t
Definition: control.h:57
snd_ctl_elem_list_get_name
const char * snd_ctl_elem_list_get_name(const snd_ctl_elem_list_t *obj, unsigned int idx)
Get name part of CTL element identifier for an entry of a CTL element identifiers list.
Definition: control.c:2174
snd_device_name_hint
int snd_device_name_hint(int card, const char *iface, void ***hints)
Get a set of device name hints.
Definition: namehint.c:555
snd_ctl_card_info
int snd_ctl_card_info(snd_ctl_t *ctl, snd_ctl_card_info_t *info)
Get card related information.
Definition: control.c:275
snd_ctl_elem_list
int snd_ctl_elem_list(snd_ctl_t *ctl, snd_ctl_elem_list_t *list)
Get a list of element identifiers.
Definition: control.c:287
snd_ctl_elem_value_set_byte
void snd_ctl_elem_value_set_byte(snd_ctl_elem_value_t *obj, unsigned int idx, unsigned char val)
Set value for a specified member to given data as an element of byte type.
Definition: control.c:3111
snd_ctl_event_elem_get_interface
snd_ctl_elem_iface_t snd_ctl_event_elem_get_interface(const snd_ctl_event_t *obj)
Get interface part of CTL element identifier for an element related event.
Definition: control.c:1579
snd_hctl_close
int snd_hctl_close(snd_hctl_t *hctl)
close HCTL handle
Definition: hcontrol.c:111
snd_tlv_get_dB_range
int snd_tlv_get_dB_range(unsigned int *tlv, long rangemin, long rangemax, long *min, long *max)
Get the dB min/max values.
Definition: tlv.c:129
snd_ctl_elem_id_get_device
unsigned int snd_ctl_elem_id_get_device(const snd_ctl_elem_id_t *obj)
Get device part of a CTL element identifier.
Definition: control.c:1721
snd_ctl_elem_info_is_tlv_commandable
int snd_ctl_elem_info_is_tlv_commandable(const snd_ctl_elem_info_t *obj)
Get info about TLV command possibility from a CTL element id/info.
Definition: control.c:2361
snd_ctl_event_type_name
const char * snd_ctl_event_type_name(snd_ctl_event_type_t type)
get name of a CTL event type
Definition: control.c:1503
snd_hctl_elem_get_device
unsigned int snd_hctl_elem_get_device(const snd_hctl_elem_t *obj)
Get device part of CTL element identifier of a CTL element id/value.
Definition: hcontrol.c:942
snd_ctl_elem_list_get_numid
unsigned int snd_ctl_elem_list_get_numid(const snd_ctl_elem_list_t *obj, unsigned int idx)
Get CTL element numeric identifier for an entry of a CTL element identifiers list.
Definition: control.c:2122
snd_ctl_card_info_get_mixername
const char * snd_ctl_card_info_get_mixername(const snd_ctl_card_info_t *obj)
Get card mixer name from a CTL card info.
Definition: control.c:1938
snd_ctl_open
int snd_ctl_open(snd_ctl_t **ctl, const char *name, int mode)
Opens a CTL.
Definition: control.c:1394
snd_aes_iec958::dig_subframe
unsigned char dig_subframe[4]
Definition: control.h:50
SND_CTL_ELEM_IFACE_HWDEP
@ SND_CTL_ELEM_IFACE_HWDEP
Definition: control.h:95
snd_ctl_elem_id_copy
void snd_ctl_elem_id_copy(snd_ctl_elem_id_t *dst, const snd_ctl_elem_id_t *src)
copy one snd_ctl_elem_id_t to another
Definition: control.c:1688
snd_ctl_elem_id_set_subdevice
void snd_ctl_elem_id_set_subdevice(snd_ctl_elem_id_t *obj, unsigned int val)
Set subdevice part for a CTL element identifier.
Definition: control.c:1798
snd_hctl_elem_tlv_command
int snd_hctl_elem_tlv_command(snd_hctl_elem_t *elem, const unsigned int *tlv)
Set TLV value for an HCTL element.
Definition: hcontrol.c:885
snd_device_name_free_hint
int snd_device_name_free_hint(void **hints)
Free a list of device name hints.
Definition: namehint.c:658
snd_ctl_elem_list_get_used
unsigned int snd_ctl_elem_list_get_used(const snd_ctl_elem_list_t *obj)
Get number of used entries in CTL element identifiers list.
Definition: control.c:2086
snd_ctl_ascii_elem_id_get
char * snd_ctl_ascii_elem_id_get(snd_ctl_elem_id_t *id)
return ASCII CTL element identifier name
Definition: ctlparse.c:114
snd_ctl_get_dB_range
int snd_ctl_get_dB_range(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id, long *min, long *max)
Get the dB min/max values on the given control element.
Definition: tlv.c:448
snd_ctl_card_info_clear
void snd_ctl_card_info_clear(snd_ctl_card_info_t *obj)
clear given snd_ctl_card_info_t object
Definition: control.c:1862
snd_ctl_poll_descriptors_count
int snd_ctl_poll_descriptors_count(snd_ctl_t *ctl)
get count of poll descriptors for CTL handle
Definition: control.c:204
snd_ctl_elem_list_copy
void snd_ctl_elem_list_copy(snd_ctl_elem_list_t *dst, const snd_ctl_elem_list_t *src)
copy one snd_ctl_elem_list_t to another
Definition: control.c:2064
snd_ctl_event_elem_get_mask
unsigned int snd_ctl_event_elem_get_mask(const snd_ctl_event_t *obj)
Get event mask for an element related event.
Definition: control.c:1543
snd_ctl_elem_id_set_name
void snd_ctl_elem_id_set_name(snd_ctl_elem_id_t *obj, const char *val)
Set name part for a CTL element identifier.
Definition: control.c:1809
snd_ctl_card_info_free
void snd_ctl_card_info_free(snd_ctl_card_info_t *obj)
frees a previously allocated snd_ctl_card_info_t
Definition: control.c:1853
snd_ctl_elem_id_set_index
void snd_ctl_elem_id_set_index(snd_ctl_elem_id_t *obj, unsigned int val)
Set index part for a CTL element identifier.
Definition: control.c:1820
snd_ctl_pcm_info
int snd_ctl_pcm_info(snd_ctl_t *ctl, snd_pcm_info_t *info)
Get info about a PCM device.
Definition: control.c:1069
snd_ctl_event_elem_get_index
unsigned int snd_ctl_event_elem_get_index(const snd_ctl_event_t *obj)
Get index part of CTL element identifier for an element related event.
Definition: control.c:1627
snd_pcm_info_t
struct _snd_pcm_info snd_pcm_info_t
Definition: pcm.h:48
snd_ctl_elem_list_t
struct _snd_ctl_elem_list snd_ctl_elem_list_t
Definition: control.h:60
snd_ctl_elem_info_is_owner
int snd_ctl_elem_info_is_owner(const snd_ctl_elem_info_t *obj)
Get info if I own an element.
Definition: control.c:2317
snd_ctl_elem_info_get_dimensions
int snd_ctl_elem_info_get_dimensions(const snd_ctl_elem_info_t *obj)
Get count of dimensions for given element.
Definition: control.c:2519
_snd_ctl_event_type
_snd_ctl_event_type
Definition: control.h:110
snd_ctl_add_enumerated_elem_set
int snd_ctl_add_enumerated_elem_set(snd_ctl_t *ctl, snd_ctl_elem_info_t *info, unsigned int element_count, unsigned int member_count, unsigned int items, const char *const labels[])
Create and add some user-defined control elements of enumerated type.
Definition: control.c:619
snd_ctl_event_clear
void snd_ctl_event_clear(snd_ctl_event_t *obj)
clear given snd_ctl_event_t object
Definition: control.c:1991
snd_ctl_elem_value_clear
void snd_ctl_elem_value_clear(snd_ctl_elem_value_t *obj)
Clear given data of an element.
Definition: control.c:2792
snd_async_handler_get_ctl
snd_ctl_t * snd_async_handler_get_ctl(snd_async_handler_t *handler)
Return CTL handle related to an async handler.
Definition: control.c:1242
SND_CTL_ELEM_IFACE_SEQUENCER
@ SND_CTL_ELEM_IFACE_SEQUENCER
Definition: control.h:105
snd_hctl_poll_descriptors_revents
int snd_hctl_poll_descriptors_revents(snd_hctl_t *ctl, struct pollfd *pfds, unsigned int nfds, unsigned short *revents)
get returned events from poll descriptors
Definition: hcontrol.c:195
snd_card_get_name
int snd_card_get_name(int card, char **name)
Obtain the card name.
Definition: cards.c:173
snd_ctl_elem_value_set_name
void snd_ctl_elem_value_set_name(snd_ctl_elem_value_t *obj, const char *val)
Set name part of element identifier to given data of an element.
Definition: control.c:2961
snd_hctl_set_compare
int snd_hctl_set_compare(snd_hctl_t *hctl, snd_hctl_compare_t hsort)
Change HCTL compare function and reorder elements.
Definition: hcontrol.c:448
snd_ctl_elem_info_get_max64
long long snd_ctl_elem_info_get_max64(const snd_ctl_elem_info_t *obj)
Get maximum value from a SND_CTL_ELEM_TYPE_INTEGER64 CTL element id/info.
Definition: control.c:2454
snd_ctl_elem_value_sizeof
size_t snd_ctl_elem_value_sizeof(void)
Get size of data structure for an element.
Definition: control.c:2760
snd_sctl_free
int snd_sctl_free(snd_sctl_t *handle)
Free setup control handle.
Definition: setup.c:644
snd_ctl_elem_value_set_subdevice
void snd_ctl_elem_value_set_subdevice(snd_ctl_elem_value_t *obj, unsigned int val)
Set subdevice part of element identifier to given data of an element.
Definition: control.c:2950
snd_ctl_rawmidi_next_device
int snd_ctl_rawmidi_next_device(snd_ctl_t *ctl, int *device)
Get next RawMidi device number.
Definition: control.c:1093
snd_ctl_read
int snd_ctl_read(snd_ctl_t *ctl, snd_ctl_event_t *event)
Read an event.
Definition: control.c:1157
SND_CTL_ELEM_IFACE_PCM
@ SND_CTL_ELEM_IFACE_PCM
Definition: control.h:99
snd_ctl_elem_info_get_id
void snd_ctl_elem_info_get_id(const snd_ctl_elem_info_t *obj, snd_ctl_elem_id_t *ptr)
Get CTL element identifier of a CTL element id/info.
Definition: control.c:2607
snd_tlv_convert_from_dB
int snd_tlv_convert_from_dB(unsigned int *tlv, long rangemin, long rangemax, long db_gain, long *value, int xdir)
Convert from dB gain to the corresponding raw value.
Definition: tlv.c:292
snd_hctl_elem_callback_t
int(* snd_hctl_elem_callback_t)(snd_hctl_elem_t *elem, unsigned int mask)
HCTL element callback function.
Definition: control.h:551
snd_async_handler_t
struct _snd_async_handler snd_async_handler_t
Internal structure for an async notification client handler.
Definition: global.h:114
snd_hctl_elem_tlv_write
int snd_hctl_elem_tlv_write(snd_hctl_elem_t *elem, const unsigned int *tlv)
Set TLV value for an HCTL element.
Definition: hcontrol.c:869
snd_aes_iec958::status
unsigned char status[24]
Definition: control.h:47
snd_ctl_subscribe_events
int snd_ctl_subscribe_events(snd_ctl_t *ctl, int subscribe)
Ask to be informed about events (poll, snd_async_add_ctl_handler, snd_ctl_read)
Definition: control.c:262
snd_ctl_poll_descriptors_revents
int snd_ctl_poll_descriptors_revents(snd_ctl_t *ctl, struct pollfd *pfds, unsigned int nfds, unsigned short *revents)
get returned events from poll descriptors
Definition: control.c:244
snd_ctl_elem_add_iec958
int snd_ctl_elem_add_iec958(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id)
Create and add a user-defined control element of IEC958 type.
Definition: control.c:839
snd_ctl_elem_info_set_device
void snd_ctl_elem_info_set_device(snd_ctl_elem_info_t *obj, unsigned int val)
Set device part of CTL element identifier of a CTL element id/info.
Definition: control.c:2717
snd_ctl_elem_info_get_name
const char * snd_ctl_elem_info_get_name(const snd_ctl_elem_info_t *obj)
Get name part of CTL element identifier of a CTL element id/info.
Definition: control.c:2662
snd_ctl_card_info_get_components
const char * snd_ctl_card_info_get_components(const snd_ctl_card_info_t *obj)
Get card component list from a CTL card info.
Definition: control.c:1949
snd_ctl_elem_info_get_step64
long long snd_ctl_elem_info_get_step64(const snd_ctl_elem_info_t *obj)
Get value step from a SND_CTL_ELEM_TYPE_INTEGER64 CTL element id/info.
Definition: control.c:2466
snd_ctl_elem_value_set_integer
void snd_ctl_elem_value_set_integer(snd_ctl_elem_value_t *obj, unsigned int idx, long val)
Set value of a specified member to given data as an element of integer type.
Definition: control.c:3069
snd_hctl_elem_next
snd_hctl_elem_t * snd_hctl_elem_next(snd_hctl_elem_t *elem)
get next HCTL element
Definition: hcontrol.c:524
snd_ctl_card_info_get_card
int snd_ctl_card_info_get_card(const snd_ctl_card_info_t *obj)
Get card number from a CTL card info.
Definition: control.c:1883
snd_ctl_elem_value_set_interface
void snd_ctl_elem_value_set_interface(snd_ctl_elem_value_t *obj, snd_ctl_elem_iface_t val)
Set interface part of element identifier to given data of an element.
Definition: control.c:2928
ptr
void * ptr
Definition: seq_event.h:199
snd_hctl_first_elem
snd_hctl_elem_t * snd_hctl_first_elem(snd_hctl_t *hctl)
get first element for an HCTL
Definition: hcontrol.c:498
snd_ctl_elem_list_set_offset
void snd_ctl_elem_list_set_offset(snd_ctl_elem_list_t *obj, unsigned int val)
Set index of first wanted CTL element identifier in a CTL element identifiers list.
Definition: control.c:2075
snd_tlv_convert_to_dB
int snd_tlv_convert_to_dB(unsigned int *tlv, long rangemin, long rangemax, long volume, long *db_gain)
Convert the given raw volume value to a dB gain.
Definition: tlv.c:201
snd_ctl_elem_info_set_numid
void snd_ctl_elem_info_set_numid(snd_ctl_elem_info_t *obj, unsigned int val)
Set element numeric identifier of a CTL element id/info.
Definition: control.c:2695
snd_ctl_elem_remove
int snd_ctl_elem_remove(snd_ctl_t *ctl, snd_ctl_elem_id_t *id)
Remove an user CTL element.
Definition: control.c:858
snd_ctl_wait
int snd_ctl_wait(snd_ctl_t *ctl, int timeout)
Wait for a CTL to become ready (i.e. at least one event pending)
Definition: control.c:1169
SND_CTL_ELEM_IFACE_MIXER
@ SND_CTL_ELEM_IFACE_MIXER
Definition: control.h:97
snd_ctl_elem_info
int snd_ctl_elem_info(snd_ctl_t *ctl, snd_ctl_elem_info_t *info)
Get CTL element information.
Definition: control.c:300
snd_ctl_elem_info_set_subdevice
void snd_ctl_elem_info_set_subdevice(snd_ctl_elem_info_t *obj, unsigned int val)
Set subdevice part of CTL element identifier of a CTL element id/info.
Definition: control.c:2728
snd_tlv_parse_dB_info
int snd_tlv_parse_dB_info(unsigned int *tlv, unsigned int tlv_size, unsigned int **db_tlvp)
Parse TLV stream and retrieve dB information.
Definition: tlv.c:59
snd_ctl_elem_info_t
struct _snd_ctl_elem_info snd_ctl_elem_info_t
Definition: control.h:63
snd_ctl_elem_value_copy
void snd_ctl_elem_value_copy(snd_ctl_elem_value_t *dst, const snd_ctl_elem_value_t *src)
Copy two data of elements.
Definition: control.c:2802
snd_ctl_elem_value_get_boolean
int snd_ctl_elem_value_get_boolean(const snd_ctl_elem_value_t *obj, unsigned int idx)
Get value of a specified member from given data as an element of boolean type.
Definition: control.c:2985
snd_ctl_card_info_malloc
int snd_ctl_card_info_malloc(snd_ctl_card_info_t **ptr)
allocate an invalid snd_ctl_card_info_t using standard malloc
Definition: control.c:1840
snd_ctl_elem_info_get_subdevice
unsigned int snd_ctl_elem_info_get_subdevice(const snd_ctl_elem_info_t *obj)
Get subdevice part of CTL element identifier of a CTL element id/info.
Definition: control.c:2651
snd_hctl_nonblock
int snd_hctl_nonblock(snd_hctl_t *hctl, int nonblock)
set nonblock mode
Definition: hcontrol.c:142
SND_CTL_EVENT_ELEM
@ SND_CTL_EVENT_ELEM
Definition: control.h:112
snd_ctl_elem_list_malloc
int snd_ctl_elem_list_malloc(snd_ctl_elem_list_t **ptr)
allocate an invalid snd_ctl_elem_list_t using standard malloc
Definition: control.c:2032
snd_ctl_close
int snd_ctl_close(snd_ctl_t *ctl)
close CTL handle
Definition: control.c:132
snd_ctl_elem_value_set_id
void snd_ctl_elem_value_set_id(snd_ctl_elem_value_t *obj, const snd_ctl_elem_id_t *ptr)
Set element identifier to given data of an element.
Definition: control.c:2906
snd_ctl_elem_info_is_volatile
int snd_ctl_elem_info_is_volatile(const snd_ctl_elem_info_t *obj)
Get info about notification feasibility from a CTL element id/info.
Definition: control.c:2284
snd_ctl_elem_list_free_space
void snd_ctl_elem_list_free_space(snd_ctl_elem_list_t *obj)
free previously allocated space for CTL element identifiers list
Definition: control.c:1531
snd_ctl_elem_list_get_interface
snd_ctl_elem_iface_t snd_ctl_elem_list_get_interface(const snd_ctl_elem_list_t *obj, unsigned int idx)
Get interface part of CTL element identifier for an entry of a CTL element identifiers list.
Definition: control.c:2135
snd_ctl_elem_value_malloc
int snd_ctl_elem_value_malloc(snd_ctl_elem_value_t **ptr)
Allocate an invalid snd_ctl_elem_value_t using standard malloc(3).
Definition: control.c:2770
SND_CTL_ELEM_IFACE_TIMER
@ SND_CTL_ELEM_IFACE_TIMER
Definition: control.h:103
snd_ctl_card_info_sizeof
size_t snd_ctl_card_info_sizeof(void)
get size of snd_ctl_card_info_t
Definition: control.c:1830
snd_ctl_elem_id_get_numid
unsigned int snd_ctl_elem_id_get_numid(const snd_ctl_elem_id_t *obj)
Get numeric identifier from a CTL element identifier.
Definition: control.c:1699
snd_hctl_elem_get_numid
unsigned int snd_hctl_elem_get_numid(const snd_hctl_elem_t *obj)
Get element numeric identifier of a CTL element id/value.
Definition: hcontrol.c:920
snd_ctl_elem_id_get_name
const char * snd_ctl_elem_id_get_name(const snd_ctl_elem_id_t *obj)
Get name part of a CTL element identifier.
Definition: control.c:1743
snd_ctl_elem_value_get_numid
unsigned int snd_ctl_elem_value_get_numid(const snd_ctl_elem_value_t *obj)
Get element numeric identifier from given data of an element.
Definition: control.c:2838
snd_sctl_install
int snd_sctl_install(snd_sctl_t *handle)
Install given values to control elements.
Definition: setup.c:83
snd_hctl_wait
int snd_hctl_wait(snd_hctl_t *hctl, int timeout)
Wait for a HCTL to become ready (i.e. at least one event pending)
Definition: hcontrol.c:675
snd_ctl_get_power_state
int snd_ctl_get_power_state(snd_ctl_t *ctl, unsigned int *state)
Get actual Power State.
Definition: control.c:1143
snd_ctl_elem_value_get_name
const char * snd_ctl_elem_value_get_name(const snd_ctl_elem_value_t *obj)
Get name part of element identifier from given data of an element.
Definition: control.c:2884
snd_ctl_card_info_get_longname
const char * snd_ctl_card_info_get_longname(const snd_ctl_card_info_t *obj)
Get card long name from a CTL card info.
Definition: control.c:1927
snd_async_add_ctl_handler
int snd_async_add_ctl_handler(snd_async_handler_t **handler, snd_ctl_t *ctl, snd_async_callback_t callback, void *private_data)
Add an async handler for a CTL.
Definition: control.c:1212
snd_ctl_elem_list_free
void snd_ctl_elem_list_free(snd_ctl_elem_list_t *obj)
frees a previously allocated snd_ctl_elem_list_t
Definition: control.c:2045
snd_ctl_hwdep_info
int snd_ctl_hwdep_info(snd_ctl_t *ctl, snd_hwdep_info_t *info)
Get info about a hardware dependent device.
Definition: control.c:1045
snd_ctl_elem_info_malloc
int snd_ctl_elem_info_malloc(snd_ctl_elem_info_t **ptr)
allocate an invalid snd_ctl_elem_info_t using standard malloc
Definition: control.c:2208
snd_ctl_event_t
struct _snd_ctl_event snd_ctl_event_t
Definition: control.h:69
snd_hctl_elem_get_hctl
snd_hctl_t * snd_hctl_elem_get_hctl(snd_hctl_elem_t *elem)
Get HCTL handle for an HCTL element.
Definition: hcontrol.c:898
snd_ctl_event_elem_get_subdevice
unsigned int snd_ctl_event_elem_get_subdevice(const snd_ctl_event_t *obj)
Get subdevice part of CTL element identifier for an element related event.
Definition: control.c:1603
snd_ctl_event_free
void snd_ctl_event_free(snd_ctl_event_t *obj)
frees a previously allocated snd_ctl_event_t
Definition: control.c:1982
snd_card_get_index
int snd_card_get_index(const char *name)
Convert card string to an integer value.
Definition: cards.c:125
_snd_ctl_elem_iface
_snd_ctl_elem_iface
Definition: control.h:91
snd_hctl_name
const char * snd_hctl_name(snd_hctl_t *hctl)
get identifier of HCTL handle
Definition: hcontrol.c:130
snd_ctl_elem_info_is_tlv_readable
int snd_ctl_elem_info_is_tlv_readable(const snd_ctl_elem_info_t *obj)
Get info about TLV readability from a CTL element id/info.
Definition: control.c:2339
snd_ctl_elem_add_integer
int snd_ctl_elem_add_integer(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id, unsigned int count, long imin, long imax, long istep)
Create and add an user-defined control element of integer type.
Definition: control.c:733
snd_ctl_card_info_get_name
const char * snd_ctl_card_info_get_name(const snd_ctl_card_info_t *obj)
Get card name from a CTL card info.
Definition: control.c:1916
snd_ctl_add_bytes_elem_set
int snd_ctl_add_bytes_elem_set(snd_ctl_t *ctl, snd_ctl_elem_info_t *info, unsigned int element_count, unsigned int member_count)
Create and add some user-defined control elements of bytes type.
Definition: control.c:706
snd_hctl_set_callback_private
void snd_hctl_set_callback_private(snd_hctl_t *hctl, void *data)
Set callback private value for an HCTL.
Definition: hcontrol.c:640
snd_hctl_t
struct _snd_hctl snd_hctl_t
Definition: control.h:523
snd_ctl_elem_list_get_index
unsigned int snd_ctl_elem_list_get_index(const snd_ctl_elem_list_t *obj, unsigned int idx)
Get index part of CTL element identifier for an entry of a CTL element identifiers list.
Definition: control.c:2187
snd_ctl_elem_id_set_interface
void snd_ctl_elem_id_set_interface(snd_ctl_elem_id_t *obj, snd_ctl_elem_iface_t val)
Set interface part for a CTL element identifier.
Definition: control.c:1776
snd_ctl_elem_info_is_writable
int snd_ctl_elem_info_is_writable(const snd_ctl_elem_info_t *obj)
Get info about writability from a CTL element id/info.
Definition: control.c:2273
snd_ctl_elem_value_set_integer64
void snd_ctl_elem_value_set_integer64(snd_ctl_elem_value_t *obj, unsigned int idx, long long val)
Set value of a specified member to given data as an element of integer64 type.
Definition: control.c:3083
snd_hwdep_info_t
struct _snd_hwdep_info snd_hwdep_info_t
Definition: hwdep.h:45
snd_ctl_elem_info_sizeof
size_t snd_ctl_elem_info_sizeof(void)
get size of snd_ctl_elem_info_t
Definition: control.c:2198
snd_ctl_rawmidi_prefer_subdevice
int snd_ctl_rawmidi_prefer_subdevice(snd_ctl_t *ctl, int subdev)
Set preferred RawMidi subdevice number of successive RawMidi open.
Definition: control.c:1117
snd_ctl_open_fallback
int snd_ctl_open_fallback(snd_ctl_t **ctl, snd_config_t *root, const char *name, const char *orig_name, int mode)
Opens a fallback CTL.
Definition: control.c:1432
snd_ctl_elem_set_bytes
void snd_ctl_elem_set_bytes(snd_ctl_elem_value_t *obj, void *data, size_t size)
Set values to given data as an element of bytes type.
Definition: control.c:3124
snd_ctl_elem_add_integer64
int snd_ctl_elem_add_integer64(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id, unsigned int count, long long imin, long long imax, long long istep)
Create and add an user-defined control element of integer64 type.
Definition: control.c:754
SND_CTL_ELEM_IFACE_RAWMIDI
@ SND_CTL_ELEM_IFACE_RAWMIDI
Definition: control.h:101
snd_ctl_elem_id_get_index
unsigned int snd_ctl_elem_id_get_index(const snd_ctl_elem_id_t *obj)
Get index part of a CTL element identifier.
Definition: control.c:1754
snd_hctl_handle_events
int snd_hctl_handle_events(snd_hctl_t *hctl)
Handle pending HCTL events invoking callbacks.
Definition: hcontrol.c:779
snd_ctl_type
snd_ctl_type_t snd_ctl_type(snd_ctl_t *ctl)
get type of CTL handle
Definition: control.c:118
snd_ctl_set_power_state
int snd_ctl_set_power_state(snd_ctl_t *ctl, unsigned int state)
Set Power State to given SND_CTL_POWER_* value and do the power management.
Definition: control.c:1129
snd_ctl_elem_list_get_id
void snd_ctl_elem_list_get_id(const snd_ctl_elem_list_t *obj, unsigned int idx, snd_ctl_elem_id_t *ptr)
Get CTL element identifier for an entry of a CTL element identifiers list.
Definition: control.c:2109
snd_ctl_elem_info_get_count
unsigned int snd_ctl_elem_info_get_count(const snd_ctl_elem_info_t *obj)
Get number of value entries from a CTL element id/info.
Definition: control.c:2395
SND_CTL_ELEM_TYPE_INTEGER64
@ SND_CTL_ELEM_TYPE_INTEGER64
Definition: control.h:86
snd_ctl_name
const char * snd_ctl_name(snd_ctl_t *ctl)
get identifier of CTL handle
Definition: control.c:105
snd_ctl_elem_list_alloc_space
int snd_ctl_elem_list_alloc_space(snd_ctl_elem_list_t *obj, unsigned int entries)
allocate space for CTL element identifiers list
Definition: control.c:1515
SND_CTL_TYPE_EXT
@ SND_CTL_TYPE_EXT
Definition: control.h:201
snd_hctl_elem_get_interface
snd_ctl_elem_iface_t snd_hctl_elem_get_interface(const snd_hctl_elem_t *obj)
Get interface part of CTL element identifier of a CTL element id/value.
Definition: hcontrol.c:931
snd_ctl_elem_type_name
const char * snd_ctl_elem_type_name(snd_ctl_elem_type_t type)
get name of a CTL element type
Definition: control.c:1481
snd_ctl_elem_info_get_index
unsigned int snd_ctl_elem_info_get_index(const snd_ctl_elem_info_t *obj)
Get index part of CTL element identifier of a CTL element id/info.
Definition: control.c:2673
snd_hctl_compare_fast
int snd_hctl_compare_fast(const snd_hctl_elem_t *c1, const snd_hctl_elem_t *c2)
A "don't care" fast compare functions that may be used with snd_hctl_set_compare.
Definition: hcontrol.c:462
snd_ctl_elem_read
int snd_ctl_elem_read(snd_ctl_t *ctl, snd_ctl_elem_value_t *data)
Get CTL element value.
Definition: control.c:870
snd_ctl_elem_info_is_inactive
int snd_ctl_elem_info_is_inactive(const snd_ctl_elem_info_t *obj)
Get info about status from a CTL element id/info.
Definition: control.c:2295
snd_hctl_set_callback
void snd_hctl_set_callback(snd_hctl_t *hctl, snd_hctl_callback_t callback)
Set callback function for an HCTL.
Definition: hcontrol.c:629
snd_hctl_get_callback_private
void * snd_hctl_get_callback_private(snd_hctl_t *hctl)
Get callback private value for an HCTL.
Definition: hcontrol.c:651
snd_ctl_event_elem_get_device
unsigned int snd_ctl_event_elem_get_device(const snd_ctl_event_t *obj)
Get device part of CTL element identifier for an element related event.
Definition: control.c:1591
snd_ctl_open_lconf
int snd_ctl_open_lconf(snd_ctl_t **ctl, const char *name, int mode, snd_config_t *lconf)
Opens a CTL using local configuration.
Definition: control.c:1416
SND_CTL_ELEM_TYPE_NONE
@ SND_CTL_ELEM_TYPE_NONE
Definition: control.h:74
snd_hctl_free
int snd_hctl_free(snd_hctl_t *hctl)
free HCTL loaded elements
Definition: hcontrol.c:402
SND_CTL_ELEM_TYPE_BYTES
@ SND_CTL_ELEM_TYPE_BYTES
Definition: control.h:82
snd_hctl_compare_t
int(* snd_hctl_compare_t)(const snd_hctl_elem_t *e1, const snd_hctl_elem_t *e2)
Compare function for sorting HCTL elements.
Definition: control.h:531
snd_rawmidi_info_t
struct _snd_rawmidi_info snd_rawmidi_info_t
Definition: rawmidi.h:45
snd_hctl_elem_t
struct _snd_hctl_elem snd_hctl_elem_t
Definition: control.h:520
snd_ctl_elem_list_clear
void snd_ctl_elem_list_clear(snd_ctl_elem_list_t *obj)
clear given snd_ctl_elem_list_t object
Definition: control.c:2054
SND_CTL_ELEM_TYPE_BOOLEAN
@ SND_CTL_ELEM_TYPE_BOOLEAN
Definition: control.h:76
snd_ctl_elem_list_get_subdevice
unsigned int snd_ctl_elem_list_get_subdevice(const snd_ctl_elem_list_t *obj, unsigned int idx)
Get subdevice part of CTL element identifier for an entry of a CTL element identifiers list.
Definition: control.c:2161
snd_ctl_elem_add_enumerated
int snd_ctl_elem_add_enumerated(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id, unsigned int count, unsigned int items, const char *const names[])
Create and add a user-defined control element of enumerated type.
Definition: control.c:796
SND_CTL_ELEM_TYPE_ENUMERATED
@ SND_CTL_ELEM_TYPE_ENUMERATED
Definition: control.h:80
snd_hctl_last_elem
snd_hctl_elem_t * snd_hctl_last_elem(snd_hctl_t *hctl)
get last element for an HCTL
Definition: hcontrol.c:511
snd_hctl_elem_prev
snd_hctl_elem_t * snd_hctl_elem_prev(snd_hctl_elem_t *elem)
get previous HCTL element
Definition: hcontrol.c:537
snd_hctl_poll_descriptors
int snd_hctl_poll_descriptors(snd_hctl_t *hctl, struct pollfd *pfds, unsigned int space)
get poll descriptors
Definition: hcontrol.c:181
snd_ctl_elem_info_set_name
void snd_ctl_elem_info_set_name(snd_ctl_elem_info_t *obj, const char *val)
Set name part of CTL element identifier of a CTL element id/info.
Definition: control.c:2739
snd_ctl_elem_value_get_integer64
long long snd_ctl_elem_value_get_integer64(const snd_ctl_elem_value_t *obj, unsigned int idx)
Get value of a specified member from given data as an element of integer64 type.
Definition: control.c:3013
snd_ctl_elem_value_set_enumerated
void snd_ctl_elem_value_set_enumerated(snd_ctl_elem_value_t *obj, unsigned int idx, unsigned int val)
Set value of a specified member to given data as an element of enumerated type.
Definition: control.c:3097
snd_ctl_ascii_elem_id_parse
int snd_ctl_ascii_elem_id_parse(snd_ctl_elem_id_t *dst, const char *str)
parse ASCII string as CTL element identifier
Definition: ctlparse.c:264
snd_hctl_elem_read
int snd_hctl_elem_read(snd_hctl_elem_t *elem, snd_ctl_elem_value_t *value)
Get value for an HCTL element.
Definition: hcontrol.c:820
snd_ctl_elem_info_copy
void snd_ctl_elem_info_copy(snd_ctl_elem_info_t *dst, const snd_ctl_elem_info_t *src)
copy one snd_ctl_elem_info_t to another
Definition: control.c:2240
snd_ctl_elem_id_malloc
int snd_ctl_elem_id_malloc(snd_ctl_elem_id_t **ptr)
allocate an invalid snd_ctl_elem_id_t using standard malloc
Definition: control.c:1656
SND_CTL_ELEM_IFACE_CARD
@ SND_CTL_ELEM_IFACE_CARD
Definition: control.h:93
snd_device_name_get_hint
char * snd_device_name_get_hint(const void *hint, const char *id)
Extract a value from a hint.
Definition: namehint.c:686
snd_hctl_elem_get_name
const char * snd_hctl_elem_get_name(const snd_hctl_elem_t *obj)
Get name part of CTL element identifier of a CTL element id/value.
Definition: hcontrol.c:964
snd_hctl_callback_t
int(* snd_hctl_callback_t)(snd_hctl_t *hctl, unsigned int mask, snd_hctl_elem_t *elem)
HCTL callback function.
Definition: control.h:542
SND_CTL_ELEM_TYPE_INTEGER
@ SND_CTL_ELEM_TYPE_INTEGER
Definition: control.h:78
snd_ctl_elem_id_free
void snd_ctl_elem_id_free(snd_ctl_elem_id_t *obj)
frees a previously allocated snd_ctl_elem_id_t
Definition: control.c:1669
snd_ctl_elem_id_set_device
void snd_ctl_elem_id_set_device(snd_ctl_elem_id_t *obj, unsigned int val)
Set device part for a CTL element identifier.
Definition: control.c:1787
snd_ctl_card_info_get_driver
const char * snd_ctl_card_info_get_driver(const snd_ctl_card_info_t *obj)
Get card driver name from a CTL card info.
Definition: control.c:1905
snd_sctl_t
struct _snd_sctl snd_sctl_t
Definition: control.h:220
snd_ctl_elem_value_get_enumerated
unsigned int snd_ctl_elem_value_get_enumerated(const snd_ctl_elem_value_t *obj, unsigned int idx)
Get value of a specified member from given data as an element of enumerated type.
Definition: control.c:3027
snd_hctl_elem_write
int snd_hctl_elem_write(snd_hctl_elem_t *elem, snd_ctl_elem_value_t *value)
Set value for an HCTL element.
Definition: hcontrol.c:837
snd_card_get_longname
int snd_card_get_longname(int card, char **name)
Obtain the card long name.
Definition: cards.c:203
snd_ctl_elem_iface_name
const char * snd_ctl_elem_iface_name(snd_ctl_elem_iface_t iface)
get name of a CTL element related interface
Definition: control.c:1492
snd_ctl_ascii_value_parse
int snd_ctl_ascii_value_parse(snd_ctl_t *handle, snd_ctl_elem_value_t *dst, snd_ctl_elem_info_t *info, const char *value)
parse ASCII string as CTL element value
Definition: ctlparse.c:315
snd_ctl_event_sizeof
size_t snd_ctl_event_sizeof(void)
get size of snd_ctl_event_t
Definition: control.c:1959
snd_ctl_elem_value_set_device
void snd_ctl_elem_value_set_device(snd_ctl_elem_value_t *obj, unsigned int val)
Set device part of element identifier to given data of an element.
Definition: control.c:2939
snd_ctl_elem_info_set_interface
void snd_ctl_elem_info_set_interface(snd_ctl_elem_info_t *obj, snd_ctl_elem_iface_t val)
Set interface part of CTL element identifier of a CTL element id/info.
Definition: control.c:2706
snd_ctl_elem_info_get_min64
long long snd_ctl_elem_info_get_min64(const snd_ctl_elem_info_t *obj)
Get minimum value from a SND_CTL_ELEM_TYPE_INTEGER64 CTL element id/info.
Definition: control.c:2442
snd_hctl_elem_tlv_read
int snd_hctl_elem_tlv_read(snd_hctl_elem_t *elem, unsigned int *tlv, unsigned int tlv_size)
Get TLV value for an HCTL element.
Definition: hcontrol.c:853
snd_ctl_card_info_get_id
const char * snd_ctl_card_info_get_id(const snd_ctl_card_info_t *obj)
Get card identifier from a CTL card info.
Definition: control.c:1894
snd_hctl_elem_set_callback_private
void snd_hctl_elem_set_callback_private(snd_hctl_elem_t *obj, void *val)
Set callback private value for an HCTL element.
Definition: hcontrol.c:997