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];
52 
79 typedef struct _snd_ctl_card_info snd_ctl_card_info_t;
80 
82 typedef struct _snd_ctl_elem_id snd_ctl_elem_id_t;
83 
153 typedef struct _snd_ctl_elem_list snd_ctl_elem_list_t;
154 
156 typedef struct _snd_ctl_elem_info snd_ctl_elem_info_t;
157 
210 typedef struct _snd_ctl_elem_value snd_ctl_elem_value_t;
211 
213 typedef struct _snd_ctl_event snd_ctl_event_t;
214 
216 typedef enum _snd_ctl_elem_type {
231  SND_CTL_ELEM_TYPE_LAST = SND_CTL_ELEM_TYPE_INTEGER64
233 
235 typedef enum _snd_ctl_elem_iface {
250  SND_CTL_ELEM_IFACE_LAST = SND_CTL_ELEM_IFACE_SEQUENCER
252 
254 typedef enum _snd_ctl_event_type {
257  SND_CTL_EVENT_LAST = SND_CTL_EVENT_ELEM
259 
262 #define SND_CTL_EVENT_MASK_REMOVE (~0U)
263 
264 #define SND_CTL_EVENT_MASK_VALUE (1<<0)
265 
266 #define SND_CTL_EVENT_MASK_INFO (1<<1)
267 
268 #define SND_CTL_EVENT_MASK_ADD (1<<2)
269 
270 #define SND_CTL_EVENT_MASK_TLV (1<<3)
271 
273 #define SND_CTL_NAME_NONE ""
274 
275 #define SND_CTL_NAME_PLAYBACK "Playback "
276 
277 #define SND_CTL_NAME_CAPTURE "Capture "
278 
280 #define SND_CTL_NAME_IEC958_NONE ""
281 
282 #define SND_CTL_NAME_IEC958_SWITCH "Switch"
283 
284 #define SND_CTL_NAME_IEC958_VOLUME "Volume"
285 
286 #define SND_CTL_NAME_IEC958_DEFAULT "Default"
287 
288 #define SND_CTL_NAME_IEC958_MASK "Mask"
289 
290 #define SND_CTL_NAME_IEC958_CON_MASK "Con Mask"
291 
292 #define SND_CTL_NAME_IEC958_PRO_MASK "Pro Mask"
293 
294 #define SND_CTL_NAME_IEC958_PCM_STREAM "PCM Stream"
295 
296 #define SND_CTL_NAME_IEC958(expl,direction,what) "IEC958 " expl SND_CTL_NAME_##direction SND_CTL_NAME_IEC958_##what
297 
299 #define SND_CTL_POWER_MASK 0xff00
300 
301 #define SND_CTL_POWER_D0 0x0000
302 
303 #define SND_CTL_POWER_D1 0x0100
304 
305 #define SND_CTL_POWER_D2 0x0200
306 
307 #define SND_CTL_POWER_D3 0x0300
308 
309 #define SND_CTL_POWER_D3hot (SND_CTL_POWER_D3|0x0000)
310 
311 #define SND_CTL_POWER_D3cold (SND_CTL_POWER_D3|0x0001)
312 
314 #define SND_CTL_TLVT_CONTAINER 0x0000
315 
316 #define SND_CTL_TLVT_DB_SCALE 0x0001
317 
318 #define SND_CTL_TLVT_DB_LINEAR 0x0002
319 
320 #define SND_CTL_TLVT_DB_RANGE 0x0003
321 
322 #define SND_CTL_TLVT_DB_MINMAX 0x0004
323 
324 #define SND_CTL_TLVT_DB_MINMAX_MUTE 0x0005
325 
327 #define SND_CTL_TLV_DB_GAIN_MUTE -9999999
328 
330 #define SND_CTL_TLVT_CHMAP_FIXED 0x00101
331 
332 #define SND_CTL_TLVT_CHMAP_VAR 0x00102
333 
334 #define SND_CTL_TLVT_CHMAP_PAIRED 0x00103
335 
337 typedef enum _snd_ctl_type {
349 
351 #define SND_CTL_NONBLOCK 0x0001
352 
354 #define SND_CTL_ASYNC 0x0002
355 
357 #define SND_CTL_READONLY 0x0004
358 
360 #define SND_CTL_EINTR 0x0080
361 
363 typedef struct _snd_ctl snd_ctl_t;
364 
366 #define SND_SCTL_NOFREE 0x0001
367 
369 typedef struct _snd_sctl snd_sctl_t;
370 
371 int snd_card_load(int card);
372 int snd_card_next(int *card);
373 int snd_card_get_index(const char *name);
374 int snd_card_get_name(int card, char **name);
375 int snd_card_get_longname(int card, char **name);
376 
377 int snd_device_name_hint(int card, const char *iface, void ***hints);
378 int snd_device_name_free_hint(void **hints);
379 char *snd_device_name_get_hint(const void *hint, const char *id);
380 
381 int snd_ctl_open(snd_ctl_t **ctl, const char *name, int mode);
382 int snd_ctl_open_lconf(snd_ctl_t **ctl, const char *name, int mode, snd_config_t *lconf);
383 int snd_ctl_open_fallback(snd_ctl_t **ctl, snd_config_t *root, const char *name, const char *orig_name, int mode);
384 int snd_ctl_close(snd_ctl_t *ctl);
385 int snd_ctl_nonblock(snd_ctl_t *ctl, int nonblock);
386 static __inline__ int snd_ctl_abort(snd_ctl_t *ctl) { return snd_ctl_nonblock(ctl, 2); }
388  snd_async_callback_t callback, void *private_data);
391 int snd_ctl_poll_descriptors(snd_ctl_t *ctl, struct pollfd *pfds, unsigned int space);
392 int snd_ctl_poll_descriptors_revents(snd_ctl_t *ctl, struct pollfd *pfds, unsigned int nfds, unsigned short *revents);
393 int snd_ctl_subscribe_events(snd_ctl_t *ctl, int subscribe);
402  unsigned int *tlv, unsigned int tlv_size);
404  const unsigned int *tlv);
406  const unsigned int *tlv);
407 #ifdef __ALSA_HWDEP_H
408 int snd_ctl_hwdep_next_device(snd_ctl_t *ctl, int * device);
410 #endif
411 #ifdef __ALSA_PCM_H
412 int snd_ctl_pcm_next_device(snd_ctl_t *ctl, int *device);
413 int snd_ctl_pcm_info(snd_ctl_t *ctl, snd_pcm_info_t * info);
414 int snd_ctl_pcm_prefer_subdevice(snd_ctl_t *ctl, int subdev);
415 #endif
416 #ifdef __ALSA_RAWMIDI_H
417 int snd_ctl_rawmidi_next_device(snd_ctl_t *ctl, int * device);
419 int snd_ctl_rawmidi_prefer_subdevice(snd_ctl_t *ctl, int subdev);
420 #endif
421 int snd_ctl_set_power_state(snd_ctl_t *ctl, unsigned int state);
422 int snd_ctl_get_power_state(snd_ctl_t *ctl, unsigned int *state);
423 
424 int snd_ctl_read(snd_ctl_t *ctl, snd_ctl_event_t *event);
425 int snd_ctl_wait(snd_ctl_t *ctl, int timeout);
426 const char *snd_ctl_name(snd_ctl_t *ctl);
428 
432 
433 unsigned int snd_ctl_event_elem_get_mask(const snd_ctl_event_t *obj);
434 unsigned int snd_ctl_event_elem_get_numid(const snd_ctl_event_t *obj);
437 unsigned int snd_ctl_event_elem_get_device(const snd_ctl_event_t *obj);
438 unsigned int snd_ctl_event_elem_get_subdevice(const snd_ctl_event_t *obj);
439 const char *snd_ctl_event_elem_get_name(const snd_ctl_event_t *obj);
440 unsigned int snd_ctl_event_elem_get_index(const snd_ctl_event_t *obj);
441 
442 int snd_ctl_elem_list_alloc_space(snd_ctl_elem_list_t *obj, unsigned int entries);
444 
446 int snd_ctl_ascii_elem_id_parse(snd_ctl_elem_id_t *dst, const char *str);
449  snd_ctl_elem_info_t *info,
450  const char *value);
451 
452 size_t snd_ctl_elem_id_sizeof(void);
457 #define snd_ctl_elem_id_alloca(ptr) __snd_alloca(ptr, snd_ctl_elem_id)
464 unsigned int snd_ctl_elem_id_get_numid(const snd_ctl_elem_id_t *obj);
466 unsigned int snd_ctl_elem_id_get_device(const snd_ctl_elem_id_t *obj);
467 unsigned int snd_ctl_elem_id_get_subdevice(const snd_ctl_elem_id_t *obj);
468 const char *snd_ctl_elem_id_get_name(const snd_ctl_elem_id_t *obj);
469 unsigned int snd_ctl_elem_id_get_index(const snd_ctl_elem_id_t *obj);
470 void snd_ctl_elem_id_set_numid(snd_ctl_elem_id_t *obj, unsigned int val);
472 void snd_ctl_elem_id_set_device(snd_ctl_elem_id_t *obj, unsigned int val);
473 void snd_ctl_elem_id_set_subdevice(snd_ctl_elem_id_t *obj, unsigned int val);
474 void snd_ctl_elem_id_set_name(snd_ctl_elem_id_t *obj, const char *val);
475 void snd_ctl_elem_id_set_index(snd_ctl_elem_id_t *obj, unsigned int val);
476 
477 size_t snd_ctl_card_info_sizeof(void);
478 
490 #define snd_ctl_card_info_alloca(ptr) __snd_alloca(ptr, snd_ctl_card_info)
491 
497 const char *snd_ctl_card_info_get_id(const snd_ctl_card_info_t *obj);
498 const char *snd_ctl_card_info_get_driver(const snd_ctl_card_info_t *obj);
499 const char *snd_ctl_card_info_get_name(const snd_ctl_card_info_t *obj);
503 
504 size_t snd_ctl_event_sizeof(void);
509 #define snd_ctl_event_alloca(ptr) __snd_alloca(ptr, snd_ctl_event)
513 void snd_ctl_event_copy(snd_ctl_event_t *dst, const snd_ctl_event_t *src);
515 
516 size_t snd_ctl_elem_list_sizeof(void);
517 
527 #define snd_ctl_elem_list_alloca(ptr) __snd_alloca(ptr, snd_ctl_elem_list)
528 
533 void snd_ctl_elem_list_set_offset(snd_ctl_elem_list_t *obj, unsigned int val);
534 unsigned int snd_ctl_elem_list_get_used(const snd_ctl_elem_list_t *obj);
535 unsigned int snd_ctl_elem_list_get_count(const snd_ctl_elem_list_t *obj);
536 void snd_ctl_elem_list_get_id(const snd_ctl_elem_list_t *obj, unsigned int idx, snd_ctl_elem_id_t *ptr);
537 unsigned int snd_ctl_elem_list_get_numid(const snd_ctl_elem_list_t *obj, unsigned int idx);
539 unsigned int snd_ctl_elem_list_get_device(const snd_ctl_elem_list_t *obj, unsigned int idx);
540 unsigned int snd_ctl_elem_list_get_subdevice(const snd_ctl_elem_list_t *obj, unsigned int idx);
541 const char *snd_ctl_elem_list_get_name(const snd_ctl_elem_list_t *obj, unsigned int idx);
542 unsigned int snd_ctl_elem_list_get_index(const snd_ctl_elem_list_t *obj, unsigned int idx);
543 
544 size_t snd_ctl_elem_info_sizeof(void);
549 #define snd_ctl_elem_info_alloca(ptr) __snd_alloca(ptr, snd_ctl_elem_info)
566 unsigned int snd_ctl_elem_info_get_count(const snd_ctl_elem_info_t *obj);
573 unsigned int snd_ctl_elem_info_get_items(const snd_ctl_elem_info_t *obj);
574 void snd_ctl_elem_info_set_item(snd_ctl_elem_info_t *obj, unsigned int val);
577 int snd_ctl_elem_info_get_dimension(const snd_ctl_elem_info_t *obj, unsigned int idx);
579  const int dimension[4]);
581 unsigned int snd_ctl_elem_info_get_numid(const snd_ctl_elem_info_t *obj);
583 unsigned int snd_ctl_elem_info_get_device(const snd_ctl_elem_info_t *obj);
585 const char *snd_ctl_elem_info_get_name(const snd_ctl_elem_info_t *obj);
586 unsigned int snd_ctl_elem_info_get_index(const snd_ctl_elem_info_t *obj);
588 void snd_ctl_elem_info_set_numid(snd_ctl_elem_info_t *obj, unsigned int val);
590 void snd_ctl_elem_info_set_device(snd_ctl_elem_info_t *obj, unsigned int val);
591 void snd_ctl_elem_info_set_subdevice(snd_ctl_elem_info_t *obj, unsigned int val);
592 void snd_ctl_elem_info_set_name(snd_ctl_elem_info_t *obj, const char *val);
593 void snd_ctl_elem_info_set_index(snd_ctl_elem_info_t *obj, unsigned int val);
594 void snd_ctl_elem_info_set_read_write(snd_ctl_elem_info_t *obj, int rval, int wval);
595 void snd_ctl_elem_info_set_tlv_read_write(snd_ctl_elem_info_t *obj, int rval, int wval);
597 
599  unsigned int element_count,
600  unsigned int member_count,
601  long min, long max, long step);
603  unsigned int element_count,
604  unsigned int member_count,
605  long long min, long long max,
606  long long step);
608  unsigned int element_count,
609  unsigned int member_count);
611  unsigned int element_count,
612  unsigned int member_count,
613  unsigned int items,
614  const char *const labels[]);
616  unsigned int element_count,
617  unsigned int member_count);
618 
619 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);
620 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);
621 int snd_ctl_elem_add_boolean(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id, unsigned int count);
622 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[]);
625 
626 size_t snd_ctl_elem_value_sizeof(void);
627 
639 #define snd_ctl_elem_value_alloca(ptr) __snd_alloca(ptr, snd_ctl_elem_value)
640 
647 unsigned int snd_ctl_elem_value_get_numid(const snd_ctl_elem_value_t *obj);
649 unsigned int snd_ctl_elem_value_get_device(const snd_ctl_elem_value_t *obj);
651 const char *snd_ctl_elem_value_get_name(const snd_ctl_elem_value_t *obj);
652 unsigned int snd_ctl_elem_value_get_index(const snd_ctl_elem_value_t *obj);
654 void snd_ctl_elem_value_set_numid(snd_ctl_elem_value_t *obj, unsigned int val);
656 void snd_ctl_elem_value_set_device(snd_ctl_elem_value_t *obj, unsigned int val);
657 void snd_ctl_elem_value_set_subdevice(snd_ctl_elem_value_t *obj, unsigned int val);
658 void snd_ctl_elem_value_set_name(snd_ctl_elem_value_t *obj, const char *val);
659 void snd_ctl_elem_value_set_index(snd_ctl_elem_value_t *obj, unsigned int val);
660 int snd_ctl_elem_value_get_boolean(const snd_ctl_elem_value_t *obj, unsigned int idx);
661 long snd_ctl_elem_value_get_integer(const snd_ctl_elem_value_t *obj, unsigned int idx);
662 long long snd_ctl_elem_value_get_integer64(const snd_ctl_elem_value_t *obj, unsigned int idx);
663 unsigned int snd_ctl_elem_value_get_enumerated(const snd_ctl_elem_value_t *obj, unsigned int idx);
664 unsigned char snd_ctl_elem_value_get_byte(const snd_ctl_elem_value_t *obj, unsigned int idx);
665 void snd_ctl_elem_value_set_boolean(snd_ctl_elem_value_t *obj, unsigned int idx, long val);
666 void snd_ctl_elem_value_set_integer(snd_ctl_elem_value_t *obj, unsigned int idx, long val);
667 void snd_ctl_elem_value_set_integer64(snd_ctl_elem_value_t *obj, unsigned int idx, long long val);
668 void snd_ctl_elem_value_set_enumerated(snd_ctl_elem_value_t *obj, unsigned int idx, unsigned int val);
669 void snd_ctl_elem_value_set_byte(snd_ctl_elem_value_t *obj, unsigned int idx, unsigned char val);
670 void snd_ctl_elem_set_bytes(snd_ctl_elem_value_t *obj, void *data, size_t size);
671 const void * snd_ctl_elem_value_get_bytes(const snd_ctl_elem_value_t *obj);
674 
675 int snd_tlv_parse_dB_info(unsigned int *tlv, unsigned int tlv_size,
676  unsigned int **db_tlvp);
677 int snd_tlv_get_dB_range(unsigned int *tlv, long rangemin, long rangemax,
678  long *min, long *max);
679 int snd_tlv_convert_to_dB(unsigned int *tlv, long rangemin, long rangemax,
680  long volume, long *db_gain);
681 int snd_tlv_convert_from_dB(unsigned int *tlv, long rangemin, long rangemax,
682  long db_gain, long *value, int xdir);
684  long *min, long *max);
686  long volume, long *db_gain);
688  long db_gain, long *value, int xdir);
689 
699 typedef struct _snd_hctl_elem snd_hctl_elem_t;
700 
702 typedef struct _snd_hctl snd_hctl_t;
703 
710 typedef int (*snd_hctl_compare_t)(const snd_hctl_elem_t *e1,
711  const snd_hctl_elem_t *e2);
713  const snd_hctl_elem_t *c2);
721 typedef int (*snd_hctl_callback_t)(snd_hctl_t *hctl,
722  unsigned int mask,
723  snd_hctl_elem_t *elem);
731  unsigned int mask);
732 
733 int snd_hctl_open(snd_hctl_t **hctl, const char *name, int mode);
734 int snd_hctl_open_ctl(snd_hctl_t **hctlp, snd_ctl_t *ctl);
735 int snd_hctl_close(snd_hctl_t *hctl);
736 int snd_hctl_nonblock(snd_hctl_t *hctl, int nonblock);
737 static __inline__ int snd_hctl_abort(snd_hctl_t *hctl) { return snd_hctl_nonblock(hctl, 2); }
739 int snd_hctl_poll_descriptors(snd_hctl_t *hctl, struct pollfd *pfds, unsigned int space);
740 int snd_hctl_poll_descriptors_revents(snd_hctl_t *ctl, struct pollfd *pfds, unsigned int nfds, unsigned short *revents);
741 unsigned int snd_hctl_get_count(snd_hctl_t *hctl);
747 void snd_hctl_set_callback_private(snd_hctl_t *hctl, void *data);
749 int snd_hctl_load(snd_hctl_t *hctl);
750 int snd_hctl_free(snd_hctl_t *hctl);
752 const char *snd_hctl_name(snd_hctl_t *hctl);
753 int snd_hctl_wait(snd_hctl_t *hctl, int timeout);
755 
761 int snd_hctl_elem_tlv_read(snd_hctl_elem_t *elem, unsigned int *tlv, unsigned int tlv_size);
762 int snd_hctl_elem_tlv_write(snd_hctl_elem_t *elem, const unsigned int *tlv);
763 int snd_hctl_elem_tlv_command(snd_hctl_elem_t *elem, const unsigned int *tlv);
764 
766 
768 unsigned int snd_hctl_elem_get_numid(const snd_hctl_elem_t *obj);
770 unsigned int snd_hctl_elem_get_device(const snd_hctl_elem_t *obj);
771 unsigned int snd_hctl_elem_get_subdevice(const snd_hctl_elem_t *obj);
772 const char *snd_hctl_elem_get_name(const snd_hctl_elem_t *obj);
773 unsigned int snd_hctl_elem_get_index(const snd_hctl_elem_t *obj);
777 
789 int snd_sctl_build(snd_sctl_t **ctl, snd_ctl_t *handle, snd_config_t *config,
790  snd_config_t *private_data, int mode);
791 int snd_sctl_free(snd_sctl_t *handle);
792 int snd_sctl_install(snd_sctl_t *handle);
793 int snd_sctl_remove(snd_sctl_t *handle);
794 
797 #ifdef __cplusplus
798 }
799 #endif
800 
801 #endif /* __ALSA_CONTROL_H */
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
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:2903
int snd_ctl_hwdep_next_device(snd_ctl_t *ctl, int *device)
Get next hardware dependent device number.
Definition: control.c:1180
unsigned int snd_ctl_elem_value_get_enumerated(const snd_ctl_elem_value_t *obj, unsigned int idx)
Get an element members value.
Definition: control.c:3461
Definition: control.h:345
const char * snd_ctl_elem_iface_name(snd_ctl_elem_iface_t iface)
get name of a CTL element related interface
Definition: control.c:1671
size_t snd_ctl_event_sizeof(void)
get size of snd_ctl_event_t
Definition: control.c:2246
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:2765
void snd_ctl_elem_info_set_inactive(snd_ctl_elem_info_t *obj, int val)
Set inactive parameter of a CTL element id/info.
Definition: control.c:3112
size_t snd_ctl_elem_list_sizeof(void)
get size of snd_ctl_elem_list_t.
Definition: control.c:2309
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
void * snd_hctl_get_callback_private(snd_hctl_t *hctl)
Get callback private value for an HCTL.
Definition: hcontrol.c:651
snd_ctl_elem_type_t
Definition: control.h:216
struct _snd_ctl_card_info snd_ctl_card_info_t
CTL card info container.
Definition: control.h:79
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:548
int snd_card_next(int *card)
Iterate over physical sound cards.
Definition: cards.c:108
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:499
int snd_ctl_elem_value_compare(snd_ctl_elem_value_t *left, const snd_ctl_elem_value_t *right)
Compare two snd_ctl_elem_value_t values, bytewise.
Definition: control.c:3191
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:2801
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:2941
int snd_ctl_rawmidi_info(snd_ctl_t *ctl, snd_rawmidi_info_t *info)
Get info about a RawMidi device.
Definition: control.c:1252
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:476
Definition: control.h:249
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:3007
void snd_ctl_card_info_copy(snd_ctl_card_info_t *dst, const snd_ctl_card_info_t *src)
Bitwise copy of a snd_ctl_card_info_t object.
Definition: control.c:2138
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:708
int snd_ctl_pcm_next_device(snd_ctl_t *ctl, int *device)
Get next PCM device number.
Definition: control.c:1204
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:2871
unsigned int snd_ctl_elem_value_get_index(const snd_ctl_elem_value_t *obj)
Get the identifiers &#39;index&#39; part from the given element value.
Definition: control.c:3291
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:2673
int snd_hctl_free(snd_hctl_t *hctl)
free HCTL loaded elements
Definition: hcontrol.c:402
void snd_hctl_set_callback_private(snd_hctl_t *hctl, void *data)
Set callback private value for an HCTL.
Definition: hcontrol.c:640
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:2585
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:2963
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:2574
unsigned int snd_ctl_elem_list_get_count(const snd_ctl_elem_list_t *obj)
Get total count of elements present in CTL device.
Definition: control.c:2420
Definition: control.h:220
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
unsigned int snd_ctl_elem_value_get_subdevice(const snd_ctl_elem_value_t *obj)
Get the identifiers &#39;subdevice&#39; part from the given element value.
Definition: control.c:3263
int snd_card_load(int card)
Try to load the driver for a card.
Definition: cards.c:83
Definition: control.h:343
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:2824
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:1755
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:2018
pid_t snd_ctl_elem_info_get_owner(const snd_ctl_elem_info_t *obj)
Get owner of a locked element.
Definition: control.c:2707
struct _snd_rawmidi_info snd_rawmidi_info_t
Definition: rawmidi.h:45
void snd_ctl_elem_value_set_index(snd_ctl_elem_value_t *obj, unsigned int val)
Set the identifiers &#39;index&#39; part within the given element value.
Definition: control.c:3390
Definition: control.h:256
int snd_hctl_compare_fast(const snd_hctl_elem_t *c1, const snd_hctl_elem_t *c2)
A "don&#39;t care" fast compare functions that may be used with snd_hctl_set_compare. ...
Definition: hcontrol.c:462
struct _snd_pcm_info snd_pcm_info_t
Definition: pcm.h:48
void snd_ctl_elem_value_free(snd_ctl_elem_value_t *obj)
Free an snd_ctl_elem_value_t previously allocated using snd_ctl_elem_value_malloc().
Definition: control.c:3155
int snd_ctl_elem_info_is_locked(const snd_ctl_elem_info_t *obj)
Get info whether an element is locked.
Definition: control.c:2629
void snd_ctl_elem_value_set_boolean(snd_ctl_elem_value_t *obj, unsigned int idx, long val)
Set an element members value.
Definition: control.c:3497
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:2288
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:1985
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:2741
void snd_ctl_elem_value_set_iec958(snd_ctl_elem_value_t *obj, const snd_aes_iec958_t *ptr)
Set an elements IEC958 data.
Definition: control.c:3644
int snd_ctl_event_malloc(snd_ctl_event_t **ptr)
allocate an invalid snd_ctl_event_t using standard malloc
Definition: control.c:2256
const void * snd_ctl_elem_value_get_bytes(const snd_ctl_elem_value_t *obj)
Get the data stored within the element.
Definition: control.c:3608
Definition: control.h:46
int snd_ctl_poll_descriptors(snd_ctl_t *ctl, struct pollfd *pfds, unsigned int space)
get poll descriptors
Definition: control.c:326
long snd_ctl_elem_value_get_integer(const snd_ctl_elem_value_t *obj, unsigned int idx)
Get an element members value.
Definition: control.c:3425
int snd_hctl_nonblock(snd_hctl_t *hctl, int nonblock)
set nonblock mode
Definition: hcontrol.c:142
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
struct _snd_ctl snd_ctl_t
Definition: control.h:363
void snd_hctl_set_callback(snd_hctl_t *hctl, snd_hctl_callback_t callback)
Set callback function for an HCTL.
Definition: hcontrol.c:629
Definition: control.h:228
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:1117
void(* snd_async_callback_t)(snd_async_handler_t *handler)
Async notification callback.
Definition: global.h:122
void snd_ctl_elem_value_set_numid(snd_ctl_elem_value_t *obj, unsigned int val)
Set the identifiers &#39;numid&#39; part within the given element value.
Definition: control.c:3320
void snd_ctl_elem_id_clear(snd_ctl_elem_id_t *obj)
clear given snd_ctl_elem_id_t object
Definition: control.c:1866
snd_ctl_elem_iface_t snd_ctl_elem_value_get_interface(const snd_ctl_elem_value_t *obj)
Get the identifiers &#39;interface&#39; part from the given element value.
Definition: control.c:3235
unsigned int snd_ctl_elem_value_get_device(const snd_ctl_elem_value_t *obj)
Get the identifiers &#39;device&#39; part from the given element value.
Definition: control.c:3249
void snd_ctl_elem_info_clear(snd_ctl_elem_info_t *obj)
clear given snd_ctl_elem_info_t object
Definition: control.c:2553
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:2299
struct _snd_ctl_elem_value snd_ctl_elem_value_t
Definition: control.h:210
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:2729
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:1803
int snd_ctl_elem_unlock(snd_ctl_t *ctl, snd_ctl_elem_id_t *id)
Unlock CTL element.
Definition: control.c:1168
int snd_ctl_nonblock(snd_ctl_t *ctl, int nonblock)
set nonblock mode
Definition: control.c:256
snd_ctl_elem_iface_t
Definition: control.h:235
unsigned int snd_hctl_get_count(snd_hctl_t *hctl)
Get number of loaded elements for an HCTL.
Definition: hcontrol.c:662
snd_hctl_elem_t * snd_hctl_last_elem(snd_hctl_t *hctl)
get last element for an HCTL
Definition: hcontrol.c:511
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:2952
Definition: control.h:247
snd_ctl_type_t
Definition: control.h:337
int snd_hctl_open_ctl(snd_hctl_t **hctlp, snd_ctl_t *ctl)
Opens an HCTL.
Definition: hcontrol.c:89
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:906
int snd_ctl_card_info(snd_ctl_t *ctl, snd_ctl_card_info_t *info)
Get information about the sound card.
Definition: control.c:385
int(* snd_hctl_callback_t)(snd_hctl_t *hctl, unsigned int mask, snd_hctl_elem_t *elem)
HCTL callback function.
Definition: control.h:721
unsigned int snd_ctl_elem_list_get_device(const snd_ctl_elem_list_t *obj, unsigned int idx)
Get the device part of CTL element identifier for an entry of a CTL element identifiers list...
Definition: control.c:2471
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:1767
const char * snd_ctl_card_info_get_mixername(const snd_ctl_card_info_t *obj)
Get the sound card mixer name from the given info object.
Definition: control.c:2222
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:2445
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:1974
int snd_ctl_elem_id_compare_set(const snd_ctl_elem_id_t *id1, const snd_ctl_elem_id_t *id2)
compare one snd_ctl_elem_id_t to another
Definition: control.c:1923
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:1876
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:2813
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:1142
int snd_ctl_open(snd_ctl_t **ctl, const char *name, int mode)
Opens a sound card.
Definition: control.c:1567
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:3073
int snd_ctl_elem_lock(snd_ctl_t *ctl, snd_ctl_elem_id_t *id)
Lock CTL element.
Definition: control.c:1156
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:2402
int snd_hctl_load(snd_hctl_t *hctl)
Load an HCTL with all elements and sort them.
Definition: hcontrol.c:565
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:1743
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:1963
void snd_ctl_elem_info_set_read_write(snd_ctl_elem_info_t *obj, int rval, int wval)
Set readability/writeability parameter of a CTL element id/info.
Definition: control.c:3085
Definition: control.h:224
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:1731
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:455
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
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
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:2753
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:2073
void snd_ctl_elem_value_get_id(const snd_ctl_elem_value_t *obj, snd_ctl_elem_id_t *ptr)
Get the element identifier from the given element value.
Definition: control.c:3207
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:630
int snd_ctl_pcm_prefer_subdevice(snd_ctl_t *ctl, int subdev)
Set preferred PCM subdevice number of successive PCM open.
Definition: control.c:1228
void snd_ctl_card_info_free(snd_ctl_card_info_t *obj)
Free an snd_ctl_card_info_t previously allocated using snd_ctl_card_info_malloc().
Definition: control.c:2115
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:2497
int snd_ctl_elem_info_is_owner(const snd_ctl_elem_info_t *obj)
Get info if I own an element.
Definition: control.c:2640
struct _snd_ctl_elem_list snd_ctl_elem_list_t
Definition: control.h:153
struct _snd_ctl_elem_id snd_ctl_elem_id_t
Definition: control.h:82
int snd_ctl_elem_list(snd_ctl_t *ctl, snd_ctl_elem_list_t *list)
Get a list of element identifiers.
Definition: control.c:412
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:765
void snd_ctl_elem_value_set_byte(snd_ctl_elem_value_t *obj, unsigned int idx, unsigned char val)
Set an element members value.
Definition: control.c:3569
Definition: control.h:243
void snd_ctl_elem_value_set_name(snd_ctl_elem_value_t *obj, const char *val)
Set the identifiers &#39;name&#39; part within the given element value.
Definition: control.c:3376
int snd_ctl_elem_info_get_dimensions(const snd_ctl_elem_info_t *obj)
Get count of dimensions for given element.
Definition: control.c:2842
const char * snd_ctl_event_type_name(snd_ctl_event_type_t type)
get name of a CTL event type
Definition: control.c:1682
void snd_ctl_elem_value_clear(snd_ctl_elem_value_t *obj)
Clear given data of an element.
Definition: control.c:3167
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
struct _snd_hwdep_info snd_hwdep_info_t
Definition: hwdep.h:45
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
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:2684
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:2051
void snd_ctl_elem_value_set_subdevice(snd_ctl_elem_value_t *obj, unsigned int val)
Set the identifiers &#39;subdevice&#39; part within the given element value.
Definition: control.c:3362
int snd_ctl_read(snd_ctl_t *ctl, snd_ctl_event_t *event)
Read an event.
Definition: control.c:1304
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
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:2930
char * snd_ctl_ascii_elem_id_get(snd_ctl_elem_id_t *id)
return ASCII CTL element identifier name
Definition: ctlparse.c:117
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
void snd_ctl_card_info_clear(snd_ctl_card_info_t *obj)
Clear given card info object.
Definition: control.c:2127
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:2062
int snd_ctl_poll_descriptors_count(snd_ctl_t *ctl)
get count of poll descriptors for CTL handle
Definition: control.c:309
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:2374
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:2789
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
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:3040
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:1815
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:3018
int snd_ctl_pcm_info(snd_ctl_t *ctl, snd_pcm_info_t *info)
Get info about a PCM device.
Definition: control.c:1216
int snd_ctl_card_info_get_card(const snd_ctl_card_info_t *obj)
Get the sound card index from the given info object.
Definition: control.c:2152
int snd_hctl_close(snd_hctl_t *hctl)
close HCTL handle
Definition: hcontrol.c:111
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:2385
void snd_ctl_event_clear(snd_ctl_event_t *obj)
clear given snd_ctl_event_t object
Definition: control.c:2278
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
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
int snd_ctl_elem_info(snd_ctl_t *ctl, snd_ctl_elem_info_t *info)
Get CTL element information.
Definition: control.c:425
snd_ctl_t * snd_async_handler_get_ctl(snd_async_handler_t *handler)
Return CTL handle related to an async handler.
Definition: control.c:1389
int snd_card_get_name(int card, char **name)
Obtain the card name.
Definition: cards.c:192
int snd_ctl_elem_remove(snd_ctl_t *ctl, snd_ctl_elem_id_t *id)
Remove an user CTL element.
Definition: control.c:989
size_t snd_ctl_elem_value_sizeof(void)
Get size of data structure for an element.
Definition: control.c:3123
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:1316
Definition: control.h:239
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:2777
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
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:2974
int snd_ctl_hwdep_info(snd_ctl_t *ctl, snd_hwdep_info_t *info)
Get info about a hardware dependent device.
Definition: control.c:1192
int snd_ctl_elem_value_get_boolean(const snd_ctl_elem_value_t *obj, unsigned int idx)
Get an element members value.
Definition: control.c:3407
int snd_ctl_card_info_malloc(snd_ctl_card_info_t **ptr)
Allocate an invalid snd_ctl_card_info_t on the heap.
Definition: control.c:2100
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
int snd_ctl_close(snd_ctl_t *ctl)
close CTL handle
Definition: control.c:236
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
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:293
Definition: control.h:226
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:367
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:349
size_t snd_ctl_card_info_sizeof(void)
get size of snd_ctl_card_info_t.
Definition: control.c:2083
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:2607
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:970
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:1719
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:2985
const char * snd_ctl_card_info_get_components(const snd_ctl_card_info_t *obj)
Get the sound cards "components" property from the given info object.
Definition: control.c:2236
void snd_ctl_elem_value_set_integer(snd_ctl_elem_value_t *obj, unsigned int idx, long val)
Set an element members value.
Definition: control.c:3515
void snd_ctl_elem_value_set_interface(snd_ctl_elem_value_t *obj, snd_ctl_elem_iface_t val)
Set the identifiers &#39;interface&#39; part within the given element value.
Definition: control.c:3334
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:1952
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:1996
int snd_hctl_poll_descriptors_count(snd_hctl_t *hctl)
get count of poll descriptors for HCTL handle
Definition: hcontrol.c:168
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
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
int snd_ctl_elem_id_compare_numid(const snd_ctl_elem_id_t *id1, const snd_ctl_elem_id_t *id2)
compare one snd_ctl_elem_id_t to another using numid
Definition: control.c:1893
const char * snd_hctl_name(snd_hctl_t *hctl)
get identifier of HCTL handle
Definition: hcontrol.c:130
Definition: control.h:339
void snd_ctl_elem_list_free(snd_ctl_elem_list_t *obj)
frees a previously allocated snd_ctl_elem_list_t.
Definition: control.c:2343
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:3051
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
const char * snd_ctl_card_info_get_longname(const snd_ctl_card_info_t *obj)
Get the sound cards long name from the given info object.
Definition: control.c:2208
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:2531
int snd_ctl_rawmidi_next_device(snd_ctl_t *ctl, int *device)
Get next RawMidi device number.
Definition: control.c:1240
struct _snd_ctl_elem_info snd_ctl_elem_info_t
Definition: control.h:156
void snd_ctl_elem_value_copy(snd_ctl_elem_value_t *dst, const snd_ctl_elem_value_t *src)
Bitwise copy of a snd_ctl_elem_value_t value.
Definition: control.c:3177
void snd_ctl_elem_value_set_id(snd_ctl_elem_value_t *obj, const snd_ctl_elem_id_t *ptr)
Set the element identifier within the given element value.
Definition: control.c:3306
struct _snd_async_handler snd_async_handler_t
Internal structure for an async notification client handler.
Definition: global.h:115
int snd_sctl_remove(snd_sctl_t *handle)
Remove (restore) previous values from control elements.
Definition: setup.c:181
int snd_sctl_free(snd_sctl_t *handle)
Free setup control handle.
Definition: setup.c:644
int snd_ctl_elem_list_malloc(snd_ctl_elem_list_t **ptr)
allocate a snd_ctl_elem_list_t using standard malloc.
Definition: control.c:2322
Definition: control.h:222
Definition: control.h:237
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:2662
int snd_ctl_elem_value_malloc(snd_ctl_elem_value_t **ptr)
Allocate an invalid snd_ctl_elem_value_t on the heap.
Definition: control.c:3140
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:845
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:2458
snd_hctl_elem_t * snd_hctl_first_elem(snd_hctl_t *hctl)
get first element for an HCTL
Definition: hcontrol.c:498
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:710
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:2596
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
unsigned int snd_ctl_elem_value_get_numid(const snd_ctl_elem_value_t *obj)
Get the identifiers &#39;numid&#39; part from the given element value.
Definition: control.c:3221
size_t snd_ctl_elem_info_sizeof(void)
get size of snd_ctl_elem_info_t
Definition: control.c:2521
int snd_hctl_open(snd_hctl_t **hctl, const char *name, int mode)
Opens an HCTL.
Definition: hcontrol.c:70
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
void snd_ctl_elem_set_bytes(snd_ctl_elem_value_t *obj, void *data, size_t size)
Replace the data stored within the element.
Definition: control.c:3589
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:2007
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:1359
int snd_ctl_get_power_state(snd_ctl_t *ctl, unsigned int *state)
Get actual Power State.
Definition: control.c:1290
int snd_hctl_handle_events(snd_hctl_t *hctl)
Handle pending HCTL events invoking callbacks.
Definition: hcontrol.c:779
const char * snd_ctl_elem_value_get_name(const snd_ctl_elem_value_t *obj)
Get the identifiers &#39;name&#39; part from the given element value.
Definition: control.c:3277
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:1611
int snd_ctl_rawmidi_prefer_subdevice(snd_ctl_t *ctl, int subdev)
Set preferred RawMidi subdevice number of successive RawMidi open.
Definition: control.c:1264
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:1276
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
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:2432
snd_hctl_t * snd_hctl_elem_get_hctl(snd_hctl_elem_t *elem)
Get HCTL handle for an HCTL element.
Definition: hcontrol.c:898
struct _snd_ctl_event snd_ctl_event_t
Definition: control.h:213
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
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:2618
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:1791
const char * snd_ctl_name(snd_ctl_t *ctl)
get identifier of CTL handle
Definition: control.c:209
void snd_ctl_event_free(snd_ctl_event_t *obj)
frees a previously allocated snd_ctl_event_t
Definition: control.c:2269
int snd_ctl_elem_read(snd_ctl_t *ctl, snd_ctl_elem_value_t *data)
Get CTL element value.
Definition: control.c:1010
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:1779
struct _snd_hctl snd_hctl_t
Definition: control.h:702
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:864
int snd_card_get_index(const char *name)
Convert a card string to the card index.
Definition: cards.c:140
const char * snd_ctl_card_info_get_name(const snd_ctl_card_info_t *obj)
Get the sound card name from the given info object.
Definition: control.c:2194
struct _snd_config snd_config_t
Internal structure for a configuration node object.
Definition: conf.h:69
Definition: control.h:241
struct _snd_hctl_elem snd_hctl_elem_t
Definition: control.h:699
Definition: control.h:341
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:2484
void snd_ctl_elem_value_set_integer64(snd_ctl_elem_value_t *obj, unsigned int idx, long long val)
Set an element members value.
Definition: control.c:3533
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:2510
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:2029
snd_hctl_elem_t * snd_hctl_elem_next(snd_hctl_elem_t *elem)
get next HCTL element
Definition: hcontrol.c:524
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:885
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:927
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:3062
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:2718
snd_ctl_type_t snd_ctl_type(snd_ctl_t *ctl)
get type of CTL handle
Definition: control.c:222
int snd_sctl_install(snd_sctl_t *handle)
Install given values to control elements.
Definition: setup.c:83
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:1699
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:2996
const char * snd_ctl_elem_type_name(snd_ctl_elem_type_t type)
get name of a CTL element type
Definition: control.c:1660
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:1844
snd_ctl_event_type_t
Definition: control.h:254
void snd_ctl_elem_info_set_tlv_read_write(snd_ctl_elem_info_t *obj, int rval, int wval)
Set TLV readability/writeability parameter of a CTL element id/info.
Definition: control.c:3099
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:1595
snd_hctl_elem_t * snd_hctl_elem_prev(snd_hctl_elem_t *elem)
get previous HCTL element
Definition: hcontrol.c:537
snd_ctl_t * snd_hctl_ctl(snd_hctl_t *hctl)
Get a ctl handle associated to the given hctl handle.
Definition: hcontrol.c:724
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:2040
const char * snd_ctl_card_info_get_driver(const snd_ctl_card_info_t *obj)
Get the sound card driver from the given info object.
Definition: control.c:2180
Definition: control.h:347
struct _snd_sctl snd_sctl_t
Definition: control.h:369
Definition: control.h:230
void * ptr
Definition: seq_event.h:199
int snd_card_get_longname(int card, char **name)
Obtain the card long name.
Definition: cards.c:222
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
void snd_ctl_elem_list_clear(snd_ctl_elem_list_t *obj)
Clear given snd_ctl_elem_list_t object.
Definition: control.c:2360
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:346
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:3029
void snd_ctl_elem_value_set_device(snd_ctl_elem_value_t *obj, unsigned int val)
Set the identifiers &#39;device&#39; part within the given element value.
Definition: control.c:3348
const char * snd_ctl_card_info_get_id(const snd_ctl_card_info_t *obj)
Get the sound card ID from the given info object.
Definition: control.c:2166
long long snd_ctl_elem_value_get_integer64(const snd_ctl_elem_value_t *obj, unsigned int idx)
Get an element members value.
Definition: control.c:3443
int snd_ctl_elem_write(snd_ctl_t *ctl, snd_ctl_elem_value_t *data)
Set CTL element value.
Definition: control.c:1031
Definition: control.h:245
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:272
void snd_ctl_elem_value_set_enumerated(snd_ctl_elem_value_t *obj, unsigned int idx, unsigned int val)
Set an element members value.
Definition: control.c:3551
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:2563
unsigned char snd_ctl_elem_value_get_byte(const snd_ctl_elem_value_t *obj, unsigned int idx)
Get an element members value.
Definition: control.c:3479
size_t snd_ctl_elem_id_sizeof(void)
get size of snd_ctl_elem_id_t
Definition: control.c:1834
void snd_ctl_elem_info_free(snd_ctl_elem_info_t *obj)
frees a previously allocated snd_ctl_elem_info_t
Definition: control.c:2544
void snd_ctl_elem_value_get_iec958(const snd_ctl_elem_value_t *obj, snd_aes_iec958_t *ptr)
Get an elements IEC958 data.
Definition: control.c:3626
Definition: control.h:218
int(* snd_hctl_elem_callback_t)(snd_hctl_elem_t *elem, unsigned int mask)
HCTL element callback function.
Definition: control.h:730
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:1080
unsigned char pad
Definition: control.h:49
int snd_hctl_poll_descriptors(snd_hctl_t *hctl, struct pollfd *pfds, unsigned int space)
get poll descriptors
Definition: hcontrol.c:181
void snd_ctl_elem_id_free(snd_ctl_elem_id_t *obj)
frees a previously allocated snd_ctl_elem_id_t
Definition: control.c:1857
int snd_ctl_elem_info_is_user(const snd_ctl_elem_info_t *obj)
Get info if it&#39;s a user element.
Definition: control.c:2651