ALSA project - the C library reference: /tmp/work/src/alsa-lib-1.2.8/include/control.h Source File

ALSA project - the C library reference

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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
32extern "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
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 {
218 SND_CTL_ELEM_TYPE_NONE = 0,
220 SND_CTL_ELEM_TYPE_BOOLEAN,
222 SND_CTL_ELEM_TYPE_INTEGER,
224 SND_CTL_ELEM_TYPE_ENUMERATED,
226 SND_CTL_ELEM_TYPE_BYTES,
228 SND_CTL_ELEM_TYPE_IEC958,
230 SND_CTL_ELEM_TYPE_INTEGER64,
231 SND_CTL_ELEM_TYPE_LAST = SND_CTL_ELEM_TYPE_INTEGER64
232} snd_ctl_elem_type_t;
233
235 typedef enum _snd_ctl_elem_iface {
237 SND_CTL_ELEM_IFACE_CARD = 0,
239 SND_CTL_ELEM_IFACE_HWDEP,
241 SND_CTL_ELEM_IFACE_MIXER,
243 SND_CTL_ELEM_IFACE_PCM,
245 SND_CTL_ELEM_IFACE_RAWMIDI,
247 SND_CTL_ELEM_IFACE_TIMER,
249 SND_CTL_ELEM_IFACE_SEQUENCER,
250 SND_CTL_ELEM_IFACE_LAST = SND_CTL_ELEM_IFACE_SEQUENCER
251} snd_ctl_elem_iface_t;
252
254 typedef enum _snd_ctl_event_type {
256 SND_CTL_EVENT_ELEM = 0,
257 SND_CTL_EVENT_LAST = SND_CTL_EVENT_ELEM
258}snd_ctl_event_type_t;
259
262#define SND_CTL_EVENT_MASK_REMOVE (~0U)
264#define SND_CTL_EVENT_MASK_VALUE (1<<0)
266#define SND_CTL_EVENT_MASK_INFO (1<<1)
268#define SND_CTL_EVENT_MASK_ADD (1<<2)
270#define SND_CTL_EVENT_MASK_TLV (1<<3)
271
273#define SND_CTL_NAME_NONE ""
275#define SND_CTL_NAME_PLAYBACK "Playback "
277#define SND_CTL_NAME_CAPTURE "Capture "
278
280#define SND_CTL_NAME_IEC958_NONE ""
282#define SND_CTL_NAME_IEC958_SWITCH "Switch"
284#define SND_CTL_NAME_IEC958_VOLUME "Volume"
286#define SND_CTL_NAME_IEC958_DEFAULT "Default"
288#define SND_CTL_NAME_IEC958_MASK "Mask"
290#define SND_CTL_NAME_IEC958_CON_MASK "Con Mask"
292#define SND_CTL_NAME_IEC958_PRO_MASK "Pro Mask"
294#define SND_CTL_NAME_IEC958_PCM_STREAM "PCM Stream"
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
301#define SND_CTL_POWER_D0 0x0000
303#define SND_CTL_POWER_D1 0x0100
305#define SND_CTL_POWER_D2 0x0200
307#define SND_CTL_POWER_D3 0x0300
309#define SND_CTL_POWER_D3hot (SND_CTL_POWER_D3|0x0000)
311#define SND_CTL_POWER_D3cold (SND_CTL_POWER_D3|0x0001)
312
314#define SND_CTL_TLVT_CONTAINER 0x0000
316#define SND_CTL_TLVT_DB_SCALE 0x0001
318#define SND_CTL_TLVT_DB_LINEAR 0x0002
320#define SND_CTL_TLVT_DB_RANGE 0x0003
322#define SND_CTL_TLVT_DB_MINMAX 0x0004
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
332#define SND_CTL_TLVT_CHMAP_VAR 0x00102
334#define SND_CTL_TLVT_CHMAP_PAIRED 0x00103
335
337 typedef enum _snd_ctl_type {
339 SND_CTL_TYPE_HW,
341 SND_CTL_TYPE_SHM,
343 SND_CTL_TYPE_INET,
345 SND_CTL_TYPE_EXT,
347 SND_CTL_TYPE_REMAP,
348} snd_ctl_type_t;
349
351#define SND_CTL_NONBLOCK 0x0001
352
354#define SND_CTL_ASYNC 0x0002
355
357#define SND_CTL_READONLY 0x0004
358
360 typedef struct _snd_ctl snd_ctl_t;
361
363#define SND_SCTL_NOFREE 0x0001
364
366 typedef struct _snd_sctl snd_sctl_t;
367
368int snd_card_load(int card);
369int snd_card_next(int *card);
370int snd_card_get_index(const char *name);
371int snd_card_get_name(int card, char **name);
372int snd_card_get_longname(int card, char **name);
373
374int snd_device_name_hint(int card, const char *iface, void ***hints);
375int snd_device_name_free_hint(void **hints);
376char *snd_device_name_get_hint(const void *hint, const char *id);
377
378int snd_ctl_open(snd_ctl_t **ctl, const char *name, int mode);
379int snd_ctl_open_lconf(snd_ctl_t **ctl, const char *name, int mode, snd_config_t *lconf);
380int snd_ctl_open_fallback(snd_ctl_t **ctl, snd_config_t *root, const char *name, const char *orig_name, int mode);
381int snd_ctl_close(snd_ctl_t *ctl);
382int snd_ctl_nonblock(snd_ctl_t *ctl, int nonblock);
383static __inline__ int snd_ctl_abort(snd_ctl_t *ctl) { return snd_ctl_nonblock(ctl, 2); }
384int snd_async_add_ctl_handler(snd_async_handler_t **handler, snd_ctl_t *ctl,
385 snd_async_callback_t callback, void *private_data);
386 snd_ctl_t *snd_async_handler_get_ctl(snd_async_handler_t *handler);
387int snd_ctl_poll_descriptors_count(snd_ctl_t *ctl);
388int snd_ctl_poll_descriptors(snd_ctl_t *ctl, struct pollfd *pfds, unsigned int space);
389int snd_ctl_poll_descriptors_revents(snd_ctl_t *ctl, struct pollfd *pfds, unsigned int nfds, unsigned short *revents);
390int snd_ctl_subscribe_events(snd_ctl_t *ctl, int subscribe);
391int snd_ctl_card_info(snd_ctl_t *ctl, snd_ctl_card_info_t *info);
392int snd_ctl_elem_list(snd_ctl_t *ctl, snd_ctl_elem_list_t *list);
393int snd_ctl_elem_info(snd_ctl_t *ctl, snd_ctl_elem_info_t *info);
394int snd_ctl_elem_read(snd_ctl_t *ctl, snd_ctl_elem_value_t *data);
395int snd_ctl_elem_write(snd_ctl_t *ctl, snd_ctl_elem_value_t *data);
396int snd_ctl_elem_lock(snd_ctl_t *ctl, snd_ctl_elem_id_t *id);
397int snd_ctl_elem_unlock(snd_ctl_t *ctl, snd_ctl_elem_id_t *id);
398int snd_ctl_elem_tlv_read(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id,
399 unsigned int *tlv, unsigned int tlv_size);
400int snd_ctl_elem_tlv_write(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id,
401 const unsigned int *tlv);
402int snd_ctl_elem_tlv_command(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id,
403 const unsigned int *tlv);
404#ifdef __ALSA_HWDEP_H
405int snd_ctl_hwdep_next_device(snd_ctl_t *ctl, int * device);
406int snd_ctl_hwdep_info(snd_ctl_t *ctl, snd_hwdep_info_t * info);
407#endif
408#ifdef __ALSA_PCM_H
409int snd_ctl_pcm_next_device(snd_ctl_t *ctl, int *device);
410int snd_ctl_pcm_info(snd_ctl_t *ctl, snd_pcm_info_t * info);
411int snd_ctl_pcm_prefer_subdevice(snd_ctl_t *ctl, int subdev);
412#endif
413#ifdef __ALSA_RAWMIDI_H
414int snd_ctl_rawmidi_next_device(snd_ctl_t *ctl, int * device);
415int snd_ctl_rawmidi_info(snd_ctl_t *ctl, snd_rawmidi_info_t * info);
416int snd_ctl_rawmidi_prefer_subdevice(snd_ctl_t *ctl, int subdev);
417#endif
418int snd_ctl_set_power_state(snd_ctl_t *ctl, unsigned int state);
419int snd_ctl_get_power_state(snd_ctl_t *ctl, unsigned int *state);
420
421int snd_ctl_read(snd_ctl_t *ctl, snd_ctl_event_t *event);
422int snd_ctl_wait(snd_ctl_t *ctl, int timeout);
423const char *snd_ctl_name(snd_ctl_t *ctl);
424 snd_ctl_type_t snd_ctl_type(snd_ctl_t *ctl);
425
426const char *snd_ctl_elem_type_name(snd_ctl_elem_type_t type);
427const char *snd_ctl_elem_iface_name(snd_ctl_elem_iface_t iface);
428const char *snd_ctl_event_type_name(snd_ctl_event_type_t type);
429
430unsigned int snd_ctl_event_elem_get_mask(const snd_ctl_event_t *obj);
431unsigned int snd_ctl_event_elem_get_numid(const snd_ctl_event_t *obj);
432void snd_ctl_event_elem_get_id(const snd_ctl_event_t *obj, snd_ctl_elem_id_t *ptr);
433 snd_ctl_elem_iface_t snd_ctl_event_elem_get_interface(const snd_ctl_event_t *obj);
434unsigned int snd_ctl_event_elem_get_device(const snd_ctl_event_t *obj);
435unsigned int snd_ctl_event_elem_get_subdevice(const snd_ctl_event_t *obj);
436const char *snd_ctl_event_elem_get_name(const snd_ctl_event_t *obj);
437unsigned int snd_ctl_event_elem_get_index(const snd_ctl_event_t *obj);
438
439int snd_ctl_elem_list_alloc_space(snd_ctl_elem_list_t *obj, unsigned int entries);
440void snd_ctl_elem_list_free_space(snd_ctl_elem_list_t *obj);
441
442char *snd_ctl_ascii_elem_id_get(snd_ctl_elem_id_t *id);
443int snd_ctl_ascii_elem_id_parse(snd_ctl_elem_id_t *dst, const char *str);
444int snd_ctl_ascii_value_parse(snd_ctl_t *handle,
445 snd_ctl_elem_value_t *dst,
446 snd_ctl_elem_info_t *info,
447 const char *value);
448
449size_t snd_ctl_elem_id_sizeof(void);
454#define snd_ctl_elem_id_alloca(ptr) __snd_alloca(ptr, snd_ctl_elem_id)
455int snd_ctl_elem_id_malloc(snd_ctl_elem_id_t **ptr);
456void snd_ctl_elem_id_free(snd_ctl_elem_id_t *obj);
457void snd_ctl_elem_id_clear(snd_ctl_elem_id_t *obj);
458void snd_ctl_elem_id_copy(snd_ctl_elem_id_t *dst, const snd_ctl_elem_id_t *src);
459int snd_ctl_elem_id_compare_numid(const snd_ctl_elem_id_t *id1, const snd_ctl_elem_id_t *id2);
460int snd_ctl_elem_id_compare_set(const snd_ctl_elem_id_t *id1, const snd_ctl_elem_id_t *id2);
461unsigned int snd_ctl_elem_id_get_numid(const snd_ctl_elem_id_t *obj);
462 snd_ctl_elem_iface_t snd_ctl_elem_id_get_interface(const snd_ctl_elem_id_t *obj);
463unsigned int snd_ctl_elem_id_get_device(const snd_ctl_elem_id_t *obj);
464unsigned int snd_ctl_elem_id_get_subdevice(const snd_ctl_elem_id_t *obj);
465const char *snd_ctl_elem_id_get_name(const snd_ctl_elem_id_t *obj);
466unsigned int snd_ctl_elem_id_get_index(const snd_ctl_elem_id_t *obj);
467void snd_ctl_elem_id_set_numid(snd_ctl_elem_id_t *obj, unsigned int val);
468void snd_ctl_elem_id_set_interface(snd_ctl_elem_id_t *obj, snd_ctl_elem_iface_t val);
469void snd_ctl_elem_id_set_device(snd_ctl_elem_id_t *obj, unsigned int val);
470void snd_ctl_elem_id_set_subdevice(snd_ctl_elem_id_t *obj, unsigned int val);
471void snd_ctl_elem_id_set_name(snd_ctl_elem_id_t *obj, const char *val);
472void snd_ctl_elem_id_set_index(snd_ctl_elem_id_t *obj, unsigned int val);
473
474size_t snd_ctl_card_info_sizeof(void);
475
487#define snd_ctl_card_info_alloca(ptr) __snd_alloca(ptr, snd_ctl_card_info)
488
489int snd_ctl_card_info_malloc(snd_ctl_card_info_t **ptr);
490void snd_ctl_card_info_free(snd_ctl_card_info_t *obj);
491void snd_ctl_card_info_clear(snd_ctl_card_info_t *obj);
492void snd_ctl_card_info_copy(snd_ctl_card_info_t *dst, const snd_ctl_card_info_t *src);
493int snd_ctl_card_info_get_card(const snd_ctl_card_info_t *obj);
494const char *snd_ctl_card_info_get_id(const snd_ctl_card_info_t *obj);
495const char *snd_ctl_card_info_get_driver(const snd_ctl_card_info_t *obj);
496const char *snd_ctl_card_info_get_name(const snd_ctl_card_info_t *obj);
497const char *snd_ctl_card_info_get_longname(const snd_ctl_card_info_t *obj);
498const char *snd_ctl_card_info_get_mixername(const snd_ctl_card_info_t *obj);
499const char *snd_ctl_card_info_get_components(const snd_ctl_card_info_t *obj);
500
501size_t snd_ctl_event_sizeof(void);
506#define snd_ctl_event_alloca(ptr) __snd_alloca(ptr, snd_ctl_event)
507int snd_ctl_event_malloc(snd_ctl_event_t **ptr);
508void snd_ctl_event_free(snd_ctl_event_t *obj);
509void snd_ctl_event_clear(snd_ctl_event_t *obj);
510void snd_ctl_event_copy(snd_ctl_event_t *dst, const snd_ctl_event_t *src);
511 snd_ctl_event_type_t snd_ctl_event_get_type(const snd_ctl_event_t *obj);
512
513size_t snd_ctl_elem_list_sizeof(void);
514
524#define snd_ctl_elem_list_alloca(ptr) __snd_alloca(ptr, snd_ctl_elem_list)
525
526int snd_ctl_elem_list_malloc(snd_ctl_elem_list_t **ptr);
527void snd_ctl_elem_list_free(snd_ctl_elem_list_t *obj);
528void snd_ctl_elem_list_clear(snd_ctl_elem_list_t *obj);
529void snd_ctl_elem_list_copy(snd_ctl_elem_list_t *dst, const snd_ctl_elem_list_t *src);
530void snd_ctl_elem_list_set_offset(snd_ctl_elem_list_t *obj, unsigned int val);
531unsigned int snd_ctl_elem_list_get_used(const snd_ctl_elem_list_t *obj);
532unsigned int snd_ctl_elem_list_get_count(const snd_ctl_elem_list_t *obj);
533void snd_ctl_elem_list_get_id(const snd_ctl_elem_list_t *obj, unsigned int idx, snd_ctl_elem_id_t *ptr);
534unsigned int snd_ctl_elem_list_get_numid(const snd_ctl_elem_list_t *obj, unsigned int idx);
535 snd_ctl_elem_iface_t snd_ctl_elem_list_get_interface(const snd_ctl_elem_list_t *obj, unsigned int idx);
536unsigned int snd_ctl_elem_list_get_device(const snd_ctl_elem_list_t *obj, unsigned int idx);
537unsigned int snd_ctl_elem_list_get_subdevice(const snd_ctl_elem_list_t *obj, unsigned int idx);
538const char *snd_ctl_elem_list_get_name(const snd_ctl_elem_list_t *obj, unsigned int idx);
539unsigned int snd_ctl_elem_list_get_index(const snd_ctl_elem_list_t *obj, unsigned int idx);
540
541size_t snd_ctl_elem_info_sizeof(void);
546#define snd_ctl_elem_info_alloca(ptr) __snd_alloca(ptr, snd_ctl_elem_info)
547int snd_ctl_elem_info_malloc(snd_ctl_elem_info_t **ptr);
548void snd_ctl_elem_info_free(snd_ctl_elem_info_t *obj);
549void snd_ctl_elem_info_clear(snd_ctl_elem_info_t *obj);
550void snd_ctl_elem_info_copy(snd_ctl_elem_info_t *dst, const snd_ctl_elem_info_t *src);
551 snd_ctl_elem_type_t snd_ctl_elem_info_get_type(const snd_ctl_elem_info_t *obj);
552int snd_ctl_elem_info_is_readable(const snd_ctl_elem_info_t *obj);
553int snd_ctl_elem_info_is_writable(const snd_ctl_elem_info_t *obj);
554int snd_ctl_elem_info_is_volatile(const snd_ctl_elem_info_t *obj);
555int snd_ctl_elem_info_is_inactive(const snd_ctl_elem_info_t *obj);
556int snd_ctl_elem_info_is_locked(const snd_ctl_elem_info_t *obj);
557int snd_ctl_elem_info_is_tlv_readable(const snd_ctl_elem_info_t *obj);
558int snd_ctl_elem_info_is_tlv_writable(const snd_ctl_elem_info_t *obj);
559int snd_ctl_elem_info_is_tlv_commandable(const snd_ctl_elem_info_t *obj);
560int snd_ctl_elem_info_is_owner(const snd_ctl_elem_info_t *obj);
561int snd_ctl_elem_info_is_user(const snd_ctl_elem_info_t *obj);
562pid_t snd_ctl_elem_info_get_owner(const snd_ctl_elem_info_t *obj);
563unsigned int snd_ctl_elem_info_get_count(const snd_ctl_elem_info_t *obj);
564long snd_ctl_elem_info_get_min(const snd_ctl_elem_info_t *obj);
565long snd_ctl_elem_info_get_max(const snd_ctl_elem_info_t *obj);
566long snd_ctl_elem_info_get_step(const snd_ctl_elem_info_t *obj);
567long long snd_ctl_elem_info_get_min64(const snd_ctl_elem_info_t *obj);
568long long snd_ctl_elem_info_get_max64(const snd_ctl_elem_info_t *obj);
569long long snd_ctl_elem_info_get_step64(const snd_ctl_elem_info_t *obj);
570unsigned int snd_ctl_elem_info_get_items(const snd_ctl_elem_info_t *obj);
571void snd_ctl_elem_info_set_item(snd_ctl_elem_info_t *obj, unsigned int val);
572const char *snd_ctl_elem_info_get_item_name(const snd_ctl_elem_info_t *obj);
573int snd_ctl_elem_info_get_dimensions(const snd_ctl_elem_info_t *obj);
574int snd_ctl_elem_info_get_dimension(const snd_ctl_elem_info_t *obj, unsigned int idx);
575int snd_ctl_elem_info_set_dimension(snd_ctl_elem_info_t *info,
576 const int dimension[4]);
577void snd_ctl_elem_info_get_id(const snd_ctl_elem_info_t *obj, snd_ctl_elem_id_t *ptr);
578unsigned int snd_ctl_elem_info_get_numid(const snd_ctl_elem_info_t *obj);
579 snd_ctl_elem_iface_t snd_ctl_elem_info_get_interface(const snd_ctl_elem_info_t *obj);
580unsigned int snd_ctl_elem_info_get_device(const snd_ctl_elem_info_t *obj);
581unsigned int snd_ctl_elem_info_get_subdevice(const snd_ctl_elem_info_t *obj);
582const char *snd_ctl_elem_info_get_name(const snd_ctl_elem_info_t *obj);
583unsigned int snd_ctl_elem_info_get_index(const snd_ctl_elem_info_t *obj);
584void snd_ctl_elem_info_set_id(snd_ctl_elem_info_t *obj, const snd_ctl_elem_id_t *ptr);
585void snd_ctl_elem_info_set_numid(snd_ctl_elem_info_t *obj, unsigned int val);
586void snd_ctl_elem_info_set_interface(snd_ctl_elem_info_t *obj, snd_ctl_elem_iface_t val);
587void snd_ctl_elem_info_set_device(snd_ctl_elem_info_t *obj, unsigned int val);
588void snd_ctl_elem_info_set_subdevice(snd_ctl_elem_info_t *obj, unsigned int val);
589void snd_ctl_elem_info_set_name(snd_ctl_elem_info_t *obj, const char *val);
590void snd_ctl_elem_info_set_index(snd_ctl_elem_info_t *obj, unsigned int val);
591void snd_ctl_elem_info_set_read_write(snd_ctl_elem_info_t *obj, int rval, int wval);
592void snd_ctl_elem_info_set_tlv_read_write(snd_ctl_elem_info_t *obj, int rval, int wval);
593void snd_ctl_elem_info_set_inactive(snd_ctl_elem_info_t *obj, int val);
594
595int snd_ctl_add_integer_elem_set(snd_ctl_t *ctl, snd_ctl_elem_info_t *info,
596 unsigned int element_count,
597 unsigned int member_count,
598 long min, long max, long step);
599int snd_ctl_add_integer64_elem_set(snd_ctl_t *ctl, snd_ctl_elem_info_t *info,
600 unsigned int element_count,
601 unsigned int member_count,
602 long long min, long long max,
603 long long step);
604int snd_ctl_add_boolean_elem_set(snd_ctl_t *ctl, snd_ctl_elem_info_t *info,
605 unsigned int element_count,
606 unsigned int member_count);
607int snd_ctl_add_enumerated_elem_set(snd_ctl_t *ctl, snd_ctl_elem_info_t *info,
608 unsigned int element_count,
609 unsigned int member_count,
610 unsigned int items,
611 const char *const labels[]);
612int snd_ctl_add_bytes_elem_set(snd_ctl_t *ctl, snd_ctl_elem_info_t *info,
613 unsigned int element_count,
614 unsigned int member_count);
615
616int 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);
617int 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);
618int snd_ctl_elem_add_boolean(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id, unsigned int count);
619int 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[]);
620int snd_ctl_elem_add_iec958(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id);
621int snd_ctl_elem_remove(snd_ctl_t *ctl, snd_ctl_elem_id_t *id);
622
623size_t snd_ctl_elem_value_sizeof(void);
624
636#define snd_ctl_elem_value_alloca(ptr) __snd_alloca(ptr, snd_ctl_elem_value)
637
638int snd_ctl_elem_value_malloc(snd_ctl_elem_value_t **ptr);
639void snd_ctl_elem_value_free(snd_ctl_elem_value_t *obj);
640void snd_ctl_elem_value_clear(snd_ctl_elem_value_t *obj);
641void snd_ctl_elem_value_copy(snd_ctl_elem_value_t *dst, const snd_ctl_elem_value_t *src);
642int snd_ctl_elem_value_compare(snd_ctl_elem_value_t *left, const snd_ctl_elem_value_t *right);
643void snd_ctl_elem_value_get_id(const snd_ctl_elem_value_t *obj, snd_ctl_elem_id_t *ptr);
644unsigned int snd_ctl_elem_value_get_numid(const snd_ctl_elem_value_t *obj);
645 snd_ctl_elem_iface_t snd_ctl_elem_value_get_interface(const snd_ctl_elem_value_t *obj);
646unsigned int snd_ctl_elem_value_get_device(const snd_ctl_elem_value_t *obj);
647unsigned int snd_ctl_elem_value_get_subdevice(const snd_ctl_elem_value_t *obj);
648const char *snd_ctl_elem_value_get_name(const snd_ctl_elem_value_t *obj);
649unsigned int snd_ctl_elem_value_get_index(const snd_ctl_elem_value_t *obj);
650void snd_ctl_elem_value_set_id(snd_ctl_elem_value_t *obj, const snd_ctl_elem_id_t *ptr);
651void snd_ctl_elem_value_set_numid(snd_ctl_elem_value_t *obj, unsigned int val);
652void snd_ctl_elem_value_set_interface(snd_ctl_elem_value_t *obj, snd_ctl_elem_iface_t val);
653void snd_ctl_elem_value_set_device(snd_ctl_elem_value_t *obj, unsigned int val);
654void snd_ctl_elem_value_set_subdevice(snd_ctl_elem_value_t *obj, unsigned int val);
655void snd_ctl_elem_value_set_name(snd_ctl_elem_value_t *obj, const char *val);
656void snd_ctl_elem_value_set_index(snd_ctl_elem_value_t *obj, unsigned int val);
657int snd_ctl_elem_value_get_boolean(const snd_ctl_elem_value_t *obj, unsigned int idx);
658long snd_ctl_elem_value_get_integer(const snd_ctl_elem_value_t *obj, unsigned int idx);
659long long snd_ctl_elem_value_get_integer64(const snd_ctl_elem_value_t *obj, unsigned int idx);
660unsigned int snd_ctl_elem_value_get_enumerated(const snd_ctl_elem_value_t *obj, unsigned int idx);
661unsigned char snd_ctl_elem_value_get_byte(const snd_ctl_elem_value_t *obj, unsigned int idx);
662void snd_ctl_elem_value_set_boolean(snd_ctl_elem_value_t *obj, unsigned int idx, long val);
663void snd_ctl_elem_value_set_integer(snd_ctl_elem_value_t *obj, unsigned int idx, long val);
664void snd_ctl_elem_value_set_integer64(snd_ctl_elem_value_t *obj, unsigned int idx, long long val);
665void snd_ctl_elem_value_set_enumerated(snd_ctl_elem_value_t *obj, unsigned int idx, unsigned int val);
666void snd_ctl_elem_value_set_byte(snd_ctl_elem_value_t *obj, unsigned int idx, unsigned char val);
667void snd_ctl_elem_set_bytes(snd_ctl_elem_value_t *obj, void *data, size_t size);
668const void * snd_ctl_elem_value_get_bytes(const snd_ctl_elem_value_t *obj);
669void snd_ctl_elem_value_get_iec958(const snd_ctl_elem_value_t *obj, snd_aes_iec958_t *ptr);
670void snd_ctl_elem_value_set_iec958(snd_ctl_elem_value_t *obj, const snd_aes_iec958_t *ptr);
671
672int snd_tlv_parse_dB_info(unsigned int *tlv, unsigned int tlv_size,
673 unsigned int **db_tlvp);
674int snd_tlv_get_dB_range(unsigned int *tlv, long rangemin, long rangemax,
675 long *min, long *max);
676int snd_tlv_convert_to_dB(unsigned int *tlv, long rangemin, long rangemax,
677 long volume, long *db_gain);
678int snd_tlv_convert_from_dB(unsigned int *tlv, long rangemin, long rangemax,
679 long db_gain, long *value, int xdir);
680int snd_ctl_get_dB_range(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id,
681 long *min, long *max);
682int snd_ctl_convert_to_dB(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id,
683 long volume, long *db_gain);
684int snd_ctl_convert_from_dB(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id,
685 long db_gain, long *value, int xdir);
686
696 typedef struct _snd_hctl_elem snd_hctl_elem_t;
697
699 typedef struct _snd_hctl snd_hctl_t;
700
707 typedef int (*snd_hctl_compare_t)(const snd_hctl_elem_t *e1,
708 const snd_hctl_elem_t *e2);
709int snd_hctl_compare_fast(const snd_hctl_elem_t *c1,
710 const snd_hctl_elem_t *c2);
718 typedef int (*snd_hctl_callback_t)(snd_hctl_t *hctl,
719 unsigned int mask,
720 snd_hctl_elem_t *elem);
727 typedef int (*snd_hctl_elem_callback_t)(snd_hctl_elem_t *elem,
728 unsigned int mask);
729
730int snd_hctl_open(snd_hctl_t **hctl, const char *name, int mode);
731int snd_hctl_open_ctl(snd_hctl_t **hctlp, snd_ctl_t *ctl);
732int snd_hctl_close(snd_hctl_t *hctl);
733int snd_hctl_nonblock(snd_hctl_t *hctl, int nonblock);
734static __inline__ int snd_hctl_abort(snd_hctl_t *hctl) { return snd_hctl_nonblock(hctl, 2); }
735int snd_hctl_poll_descriptors_count(snd_hctl_t *hctl);
736int snd_hctl_poll_descriptors(snd_hctl_t *hctl, struct pollfd *pfds, unsigned int space);
737int snd_hctl_poll_descriptors_revents(snd_hctl_t *ctl, struct pollfd *pfds, unsigned int nfds, unsigned short *revents);
738unsigned int snd_hctl_get_count(snd_hctl_t *hctl);
739int snd_hctl_set_compare(snd_hctl_t *hctl, snd_hctl_compare_t hsort);
740 snd_hctl_elem_t *snd_hctl_first_elem(snd_hctl_t *hctl);
741 snd_hctl_elem_t *snd_hctl_last_elem(snd_hctl_t *hctl);
742 snd_hctl_elem_t *snd_hctl_find_elem(snd_hctl_t *hctl, const snd_ctl_elem_id_t *id);
743void snd_hctl_set_callback(snd_hctl_t *hctl, snd_hctl_callback_t callback);
744void snd_hctl_set_callback_private(snd_hctl_t *hctl, void *data);
745void *snd_hctl_get_callback_private(snd_hctl_t *hctl);
746int snd_hctl_load(snd_hctl_t *hctl);
747int snd_hctl_free(snd_hctl_t *hctl);
748int snd_hctl_handle_events(snd_hctl_t *hctl);
749const char *snd_hctl_name(snd_hctl_t *hctl);
750int snd_hctl_wait(snd_hctl_t *hctl, int timeout);
751 snd_ctl_t *snd_hctl_ctl(snd_hctl_t *hctl);
752
753 snd_hctl_elem_t *snd_hctl_elem_next(snd_hctl_elem_t *elem);
754 snd_hctl_elem_t *snd_hctl_elem_prev(snd_hctl_elem_t *elem);
755int snd_hctl_elem_info(snd_hctl_elem_t *elem, snd_ctl_elem_info_t * info);
756int snd_hctl_elem_read(snd_hctl_elem_t *elem, snd_ctl_elem_value_t * value);
757int snd_hctl_elem_write(snd_hctl_elem_t *elem, snd_ctl_elem_value_t * value);
758int snd_hctl_elem_tlv_read(snd_hctl_elem_t *elem, unsigned int *tlv, unsigned int tlv_size);
759int snd_hctl_elem_tlv_write(snd_hctl_elem_t *elem, const unsigned int *tlv);
760int snd_hctl_elem_tlv_command(snd_hctl_elem_t *elem, const unsigned int *tlv);
761
762 snd_hctl_t *snd_hctl_elem_get_hctl(snd_hctl_elem_t *elem);
763
764void snd_hctl_elem_get_id(const snd_hctl_elem_t *obj, snd_ctl_elem_id_t *ptr);
765unsigned int snd_hctl_elem_get_numid(const snd_hctl_elem_t *obj);
766 snd_ctl_elem_iface_t snd_hctl_elem_get_interface(const snd_hctl_elem_t *obj);
767unsigned int snd_hctl_elem_get_device(const snd_hctl_elem_t *obj);
768unsigned int snd_hctl_elem_get_subdevice(const snd_hctl_elem_t *obj);
769const char *snd_hctl_elem_get_name(const snd_hctl_elem_t *obj);
770unsigned int snd_hctl_elem_get_index(const snd_hctl_elem_t *obj);
771void snd_hctl_elem_set_callback(snd_hctl_elem_t *obj, snd_hctl_elem_callback_t val);
772void * snd_hctl_elem_get_callback_private(const snd_hctl_elem_t *obj);
773void snd_hctl_elem_set_callback_private(snd_hctl_elem_t *obj, void * val);
774
786int snd_sctl_build(snd_sctl_t **ctl, snd_ctl_t *handle, snd_config_t *config,
787 snd_config_t *private_data, int mode);
788int snd_sctl_free(snd_sctl_t *handle);
789int snd_sctl_install(snd_sctl_t *handle);
790int snd_sctl_remove(snd_sctl_t *handle);
791
794#ifdef __cplusplus
795}
796#endif
797
798#endif /* __ALSA_CONTROL_H */
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:1227
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:1239
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:1191
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:1251
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:1179
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:1215
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:1203
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:1263
snd_config_t
struct _snd_config snd_config_t
Internal structure for a configuration node object.
Definition: conf.h:69
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:1610
snd_ctl_elem_value_sizeof
size_t snd_ctl_elem_value_sizeof(void)
Get size of data structure for an element.
Definition: control.c:3122
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 the identifiers 'interface' part within the given element value.
Definition: control.c:3333
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:346
snd_ctl_t
struct _snd_ctl snd_ctl_t
Definition: control.h:360
snd_ctl_elem_info_sizeof
size_t snd_ctl_elem_info_sizeof(void)
get size of snd_ctl_elem_info_t
Definition: control.c:2520
snd_ctl_nonblock
int snd_ctl_nonblock(snd_ctl_t *ctl, int nonblock)
set nonblock mode
Definition: control.c:256
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 an element members value.
Definition: control.c:3568
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.
Definition: control.c:2419
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:2359
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:1856
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:293
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:2573
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:1275
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:3017
snd_ctl_card_info_get_card
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:2151
snd_ctl_elem_iface_t
snd_ctl_elem_iface_t
Definition: control.h:235
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:2841
snd_card_get_index
int snd_card_get_index(const char *name)
Convert a card string to the card index.
Definition: cards.c:140
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:1730
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:2509
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:117
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:2628
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:1155
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:2017
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:2870
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:1358
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:2401
snd_ctl_elem_value_t
struct _snd_ctl_elem_value snd_ctl_elem_value_t
Definition: control.h:210
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:926
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:2298
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:629
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:2255
snd_ctl_elem_set_bytes
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:3588
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:2039
snd_ctl_elem_info_t
struct _snd_ctl_elem_info snd_ctl_elem_info_t
Definition: control.h:156
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:272
snd_ctl_elem_value_set_device
void snd_ctl_elem_value_set_device(snd_ctl_elem_value_t *obj, unsigned int val)
Set the identifiers 'device' part within the given element value.
Definition: control.c:3347
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:2595
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:2028
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 on the heap.
Definition: control.c:3139
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:499
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:2962
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:1141
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:2650
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:2788
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:1670
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:2617
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:2984
snd_ctl_read
int snd_ctl_read(snd_ctl_t *ctl, snd_ctl_event_t *event)
Read an event.
Definition: control.c:1303
snd_ctl_card_info_clear
void snd_ctl_card_info_clear(snd_ctl_card_info_t *obj)
Clear given card info object.
Definition: control.c:2126
snd_ctl_elem_value_set_index
void snd_ctl_elem_value_set_index(snd_ctl_elem_value_t *obj, unsigned int val)
Set the identifiers 'index' part within the given element value.
Definition: control.c:3389
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:2812
snd_ctl_card_info_get_components
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:2235
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 an element members value.
Definition: control.c:3442
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:3061
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:1875
snd_ctl_elem_value_get_numid
unsigned int snd_ctl_elem_value_get_numid(const snd_ctl_elem_value_t *obj)
Get the identifiers 'numid' part from the given element value.
Definition: control.c:3220
snd_ctl_card_info_get_id
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:2165
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:2995
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:3028
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:1594
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:1802
snd_ctl_card_info_get_name
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:2193
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:2552
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:2929
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_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:1698
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 on the heap.
Definition: control.c:2099
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:2530
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:1951
snd_card_get_longname
int snd_card_get_longname(int card, char **name)
Obtain the card long name.
Definition: cards.c:222
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:1973
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:969
snd_ctl_elem_info_set_read_write
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:3084
snd_ctl_elem_value_copy
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:3176
snd_ctl_event_sizeof
size_t snd_ctl_event_sizeof(void)
get size of snd_ctl_event_t
Definition: control.c:2245
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:1079
snd_ctl_open
int snd_ctl_open(snd_ctl_t **ctl, const char *name, int mode)
Opens a sound card.
Definition: control.c:1566
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 an element members value.
Definition: control.c:3478
snd_ctl_elem_value_get_name
const char * snd_ctl_elem_value_get_name(const snd_ctl_elem_value_t *obj)
Get the identifiers 'name' part from the given element value.
Definition: control.c:3276
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:2496
snd_ctl_card_info_sizeof
size_t snd_ctl_card_info_sizeof(void)
get size of snd_ctl_card_info_t.
Definition: control.c:2082
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:3166
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:2764
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:1984
snd_ctl_card_info_t
struct _snd_ctl_card_info snd_ctl_card_info_t
CTL card info container.
Definition: control.h:79
snd_ctl_card_info_free
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:2114
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_event_free
void snd_ctl_event_free(snd_ctl_event_t *obj)
frees a previously allocated snd_ctl_event_t
Definition: control.c:2268
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:1009
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:2072
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:1388
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:1962
snd_ctl_elem_list_sizeof
size_t snd_ctl_elem_list_sizeof(void)
get size of snd_ctl_elem_list_t.
Definition: control.c:2308
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:2287
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:2740
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:455
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:2444
snd_card_next
int snd_card_next(int *card)
Iterate over physical sound cards.
Definition: cards.c:108
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:988
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:2457
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:2431
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:2683
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:2562
snd_ctl_event_type_t
snd_ctl_event_type_t
Definition: control.h:254
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:2823
snd_ctl_event_clear
void snd_ctl_event_clear(snd_ctl_event_t *obj)
clear given snd_ctl_event_t object
Definition: control.c:2277
snd_ctl_elem_value_get_index
unsigned int snd_ctl_elem_value_get_index(const snd_ctl_elem_value_t *obj)
Get the identifiers 'index' part from the given element value.
Definition: control.c:3290
snd_ctl_elem_value_set_name
void snd_ctl_elem_value_set_name(snd_ctl_elem_value_t *obj, const char *val)
Set the identifiers 'name' part within the given element value.
Definition: control.c:3375
snd_ctl_elem_info_set_tlv_read_write
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:3098
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:2606
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:2639
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:1315
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:2776
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:1718
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:2483
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:2061
snd_ctl_elem_value_get_subdevice
unsigned int snd_ctl_elem_value_get_subdevice(const snd_ctl_elem_value_t *obj)
Get the identifiers 'subdevice' part from the given element value.
Definition: control.c:3262
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:1742
snd_ctl_name
const char * snd_ctl_name(snd_ctl_t *ctl)
get identifier of CTL handle
Definition: control.c:209
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:2752
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:3039
snd_ctl_elem_value_get_integer
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:3424
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 an elements IEC958 data.
Definition: control.c:3625
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 an element members value.
Definition: control.c:3550
snd_sctl_t
struct _snd_sctl snd_sctl_t
Definition: control.h:366
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:3006
snd_ctl_elem_value_set_numid
void snd_ctl_elem_value_set_numid(snd_ctl_elem_value_t *obj, unsigned int val)
Set the identifiers 'numid' part within the given element value.
Definition: control.c:3319
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:2543
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:2050
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:2342
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:2706
snd_ctl_elem_list_t
struct _snd_ctl_elem_list snd_ctl_elem_list_t
Definition: control.h:153
snd_ctl_event_t
struct _snd_ctl_event snd_ctl_event_t
Definition: control.h:213
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:1995
snd_ctl_type_t
snd_ctl_type_t
Definition: control.h:337
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:764
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:863
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 an element members value.
Definition: control.c:3496
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:1843
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 the identifiers 'interface' part from the given element value.
Definition: control.c:3234
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:424
snd_ctl_elem_value_get_boolean
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:3406
snd_ctl_elem_id_compare_set
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:1922
snd_ctl_elem_value_set_subdevice
void snd_ctl_elem_value_set_subdevice(snd_ctl_elem_value_t *obj, unsigned int val)
Set the identifiers 'subdevice' part within the given element value.
Definition: control.c:3361
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:2717
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:884
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:1790
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:1116
snd_ctl_card_info
int snd_ctl_card_info(snd_ctl_t *ctl, snd_ctl_card_info_t *info)
Get information about the sound card.
Definition: control.c:384
snd_ctl_elem_value_free
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:3154
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:2661
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:325
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 the element identifier within the given element value.
Definition: control.c:3305
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:3050
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:476
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:348
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:366
snd_ctl_elem_list_malloc
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:2321
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:1659
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:411
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:2373
snd_ctl_elem_value_get_bytes
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:3607
snd_card_load
int snd_card_load(int card)
Try to load the driver for a card.
Definition: cards.c:83
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:2584
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:2800
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 an element members value.
Definition: control.c:3514
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:2940
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:2951
snd_ctl_elem_value_get_device
unsigned int snd_ctl_elem_value_get_device(const snd_ctl_elem_value_t *obj)
Get the identifiers 'device' part from the given element value.
Definition: control.c:3248
snd_ctl_card_info_copy
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:2137
snd_ctl_elem_type_t
snd_ctl_elem_type_t
Definition: control.h:216
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:2728
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:1030
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:3072
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:547
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:2672
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_clear
void snd_ctl_elem_id_clear(snd_ctl_elem_id_t *obj)
clear given snd_ctl_elem_id_t object
Definition: control.c:1865
snd_ctl_card_info_get_driver
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:2179
snd_card_get_name
int snd_card_get_name(int card, char **name)
Obtain the card name.
Definition: cards.c:192
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 the element identifier from the given element value.
Definition: control.c:3206
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 two snd_ctl_elem_value_t values, bytewise.
Definition: control.c:3190
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:905
snd_ctl_elem_id_t
struct _snd_ctl_elem_id snd_ctl_elem_id_t
Definition: control.h:82
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:308
snd_ctl_elem_info_set_inactive
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:3111
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:2384
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:1754
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:2973
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:1289
snd_ctl_elem_id_compare_numid
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:1892
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:1814
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 the device part of CTL element identifier for an entry of a CTL element identifiers list.
Definition: control.c:2470
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:2006
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:1766
snd_ctl_card_info_get_longname
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:2207
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 an element members value.
Definition: control.c:3532
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 an elements IEC958 data.
Definition: control.c:3643
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:2902
snd_ctl_elem_id_sizeof
size_t snd_ctl_elem_id_sizeof(void)
get size of snd_ctl_elem_id_t
Definition: control.c:1833
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:844
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 an element members value.
Definition: control.c:3460
snd_ctl_close
int snd_ctl_close(snd_ctl_t *ctl)
close CTL handle
Definition: control.c:236
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:1167
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:1778
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:1681
snd_ctl_card_info_get_mixername
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:2221
snd_ctl_type
snd_ctl_type_t snd_ctl_type(snd_ctl_t *ctl)
get type of CTL handle
Definition: control.c:222
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:707
SND_CTL_ELEM_IFACE_CARD
@ SND_CTL_ELEM_IFACE_CARD
Definition: control.h:237
SND_CTL_ELEM_IFACE_PCM
@ SND_CTL_ELEM_IFACE_PCM
Definition: control.h:243
SND_CTL_ELEM_IFACE_SEQUENCER
@ SND_CTL_ELEM_IFACE_SEQUENCER
Definition: control.h:249
SND_CTL_ELEM_IFACE_RAWMIDI
@ SND_CTL_ELEM_IFACE_RAWMIDI
Definition: control.h:245
SND_CTL_ELEM_IFACE_HWDEP
@ SND_CTL_ELEM_IFACE_HWDEP
Definition: control.h:239
SND_CTL_ELEM_IFACE_TIMER
@ SND_CTL_ELEM_IFACE_TIMER
Definition: control.h:247
SND_CTL_ELEM_IFACE_MIXER
@ SND_CTL_ELEM_IFACE_MIXER
Definition: control.h:241
SND_CTL_EVENT_ELEM
@ SND_CTL_EVENT_ELEM
Definition: control.h:256
SND_CTL_TYPE_INET
@ SND_CTL_TYPE_INET
Definition: control.h:343
SND_CTL_TYPE_EXT
@ SND_CTL_TYPE_EXT
Definition: control.h:345
SND_CTL_TYPE_REMAP
@ SND_CTL_TYPE_REMAP
Definition: control.h:347
SND_CTL_TYPE_HW
@ SND_CTL_TYPE_HW
Definition: control.h:339
SND_CTL_TYPE_SHM
@ SND_CTL_TYPE_SHM
Definition: control.h:341
SND_CTL_ELEM_TYPE_INTEGER
@ SND_CTL_ELEM_TYPE_INTEGER
Definition: control.h:222
SND_CTL_ELEM_TYPE_NONE
@ SND_CTL_ELEM_TYPE_NONE
Definition: control.h:218
SND_CTL_ELEM_TYPE_INTEGER64
@ SND_CTL_ELEM_TYPE_INTEGER64
Definition: control.h:230
SND_CTL_ELEM_TYPE_IEC958
@ SND_CTL_ELEM_TYPE_IEC958
Definition: control.h:228
SND_CTL_ELEM_TYPE_BOOLEAN
@ SND_CTL_ELEM_TYPE_BOOLEAN
Definition: control.h:220
SND_CTL_ELEM_TYPE_ENUMERATED
@ SND_CTL_ELEM_TYPE_ENUMERATED
Definition: control.h:224
SND_CTL_ELEM_TYPE_BYTES
@ SND_CTL_ELEM_TYPE_BYTES
Definition: control.h:226
snd_async_handler_t
struct _snd_async_handler snd_async_handler_t
Internal structure for an async notification client handler.
Definition: global.h:115
snd_async_callback_t
void(* snd_async_callback_t)(snd_async_handler_t *handler)
Async notification callback.
Definition: global.h:122
snd_hctl_handle_events
int snd_hctl_handle_events(snd_hctl_t *hctl)
Handle pending HCTL events invoking callbacks.
Definition: hcontrol.c:779
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_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_name
const char * snd_hctl_name(snd_hctl_t *hctl)
get identifier of HCTL handle
Definition: hcontrol.c:130
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_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_hctl_t
struct _snd_hctl snd_hctl_t
Definition: control.h:699
snd_hctl_free
int snd_hctl_free(snd_hctl_t *hctl)
free HCTL loaded elements
Definition: hcontrol.c:402
snd_hctl_open
int snd_hctl_open(snd_hctl_t **hctl, const char *name, int mode)
Opens an HCTL.
Definition: hcontrol.c:70
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_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_hctl_nonblock
int snd_hctl_nonblock(snd_hctl_t *hctl, int nonblock)
set nonblock mode
Definition: hcontrol.c:142
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_hctl_open_ctl
int snd_hctl_open_ctl(snd_hctl_t **hctlp, snd_ctl_t *ctl)
Opens an HCTL.
Definition: hcontrol.c:89
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_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_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:718
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:707
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:727
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_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_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_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_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_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_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_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_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_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_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
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_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_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_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_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_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_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_hctl_elem_t
struct _snd_hctl_elem snd_hctl_elem_t
Definition: control.h:696
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_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_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_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_hctl_close
int snd_hctl_close(snd_hctl_t *hctl)
close HCTL handle
Definition: hcontrol.c:111
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_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_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_hwdep_info_t
struct _snd_hwdep_info snd_hwdep_info_t
Definition: hwdep.h:45
snd_pcm_info_t
struct _snd_pcm_info snd_pcm_info_t
Definition: pcm.h:48
snd_rawmidi_info_t
struct _snd_rawmidi_info snd_rawmidi_info_t
Definition: rawmidi.h:45
snd_sctl_remove
int snd_sctl_remove(snd_sctl_t *handle)
Remove (restore) previous values from control elements.
Definition: setup.c:181
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_sctl_install
int snd_sctl_install(snd_sctl_t *handle)
Install given values to control elements.
Definition: setup.c:83
snd_sctl_free
int snd_sctl_free(snd_sctl_t *handle)
Free setup control handle.
Definition: setup.c:644
ptr
void * ptr
Definition: seq_event.h:1
snd_aes_iec958_t
Definition: control.h:46
snd_aes_iec958_t::pad
unsigned char pad
Definition: control.h:49