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 
54 typedef struct _snd_ctl_card_info snd_ctl_card_info_t;
55 
57 typedef struct _snd_ctl_elem_id snd_ctl_elem_id_t;
58 
128 typedef struct _snd_ctl_elem_list snd_ctl_elem_list_t;
129 
131 typedef struct _snd_ctl_elem_info snd_ctl_elem_info_t;
132 
180 typedef struct _snd_ctl_elem_value snd_ctl_elem_value_t;
181 
183 typedef struct _snd_ctl_event snd_ctl_event_t;
184 
186 typedef enum _snd_ctl_elem_type {
201  SND_CTL_ELEM_TYPE_LAST = SND_CTL_ELEM_TYPE_INTEGER64
203 
205 typedef enum _snd_ctl_elem_iface {
220  SND_CTL_ELEM_IFACE_LAST = SND_CTL_ELEM_IFACE_SEQUENCER
222 
224 typedef enum _snd_ctl_event_type {
227  SND_CTL_EVENT_LAST = SND_CTL_EVENT_ELEM
229 
232 #define SND_CTL_EVENT_MASK_REMOVE (~0U)
233 
234 #define SND_CTL_EVENT_MASK_VALUE (1<<0)
235 
236 #define SND_CTL_EVENT_MASK_INFO (1<<1)
237 
238 #define SND_CTL_EVENT_MASK_ADD (1<<2)
239 
240 #define SND_CTL_EVENT_MASK_TLV (1<<3)
241 
243 #define SND_CTL_NAME_NONE ""
244 
245 #define SND_CTL_NAME_PLAYBACK "Playback "
246 
247 #define SND_CTL_NAME_CAPTURE "Capture "
248 
250 #define SND_CTL_NAME_IEC958_NONE ""
251 
252 #define SND_CTL_NAME_IEC958_SWITCH "Switch"
253 
254 #define SND_CTL_NAME_IEC958_VOLUME "Volume"
255 
256 #define SND_CTL_NAME_IEC958_DEFAULT "Default"
257 
258 #define SND_CTL_NAME_IEC958_MASK "Mask"
259 
260 #define SND_CTL_NAME_IEC958_CON_MASK "Con Mask"
261 
262 #define SND_CTL_NAME_IEC958_PRO_MASK "Pro Mask"
263 
264 #define SND_CTL_NAME_IEC958_PCM_STREAM "PCM Stream"
265 
266 #define SND_CTL_NAME_IEC958(expl,direction,what) "IEC958 " expl SND_CTL_NAME_##direction SND_CTL_NAME_IEC958_##what
267 
269 #define SND_CTL_POWER_MASK 0xff00
270 
271 #define SND_CTL_POWER_D0 0x0000
272 
273 #define SND_CTL_POWER_D1 0x0100
274 
275 #define SND_CTL_POWER_D2 0x0200
276 
277 #define SND_CTL_POWER_D3 0x0300
278 
279 #define SND_CTL_POWER_D3hot (SND_CTL_POWER_D3|0x0000)
280 
281 #define SND_CTL_POWER_D3cold (SND_CTL_POWER_D3|0x0001)
282 
284 #define SND_CTL_TLVT_CONTAINER 0x0000
285 
286 #define SND_CTL_TLVT_DB_SCALE 0x0001
287 
288 #define SND_CTL_TLVT_DB_LINEAR 0x0002
289 
290 #define SND_CTL_TLVT_DB_RANGE 0x0003
291 
292 #define SND_CTL_TLVT_DB_MINMAX 0x0004
293 
294 #define SND_CTL_TLVT_DB_MINMAX_MUTE 0x0005
295 
297 #define SND_CTL_TLV_DB_GAIN_MUTE -9999999
298 
300 #define SND_CTL_TLVT_CHMAP_FIXED 0x00101
301 
302 #define SND_CTL_TLVT_CHMAP_VAR 0x00102
303 
304 #define SND_CTL_TLVT_CHMAP_PAIRED 0x00103
305 
307 typedef enum _snd_ctl_type {
319 
321 #define SND_CTL_NONBLOCK 0x0001
322 
324 #define SND_CTL_ASYNC 0x0002
325 
327 #define SND_CTL_READONLY 0x0004
328 
330 typedef struct _snd_ctl snd_ctl_t;
331 
333 #define SND_SCTL_NOFREE 0x0001
334 
336 typedef struct _snd_sctl snd_sctl_t;
337 
338 int snd_card_load(int card);
339 int snd_card_next(int *card);
340 int snd_card_get_index(const char *name);
341 int snd_card_get_name(int card, char **name);
342 int snd_card_get_longname(int card, char **name);
343 
344 int snd_device_name_hint(int card, const char *iface, void ***hints);
345 int snd_device_name_free_hint(void **hints);
346 char *snd_device_name_get_hint(const void *hint, const char *id);
347 
348 int snd_ctl_open(snd_ctl_t **ctl, const char *name, int mode);
349 int snd_ctl_open_lconf(snd_ctl_t **ctl, const char *name, int mode, snd_config_t *lconf);
350 int snd_ctl_open_fallback(snd_ctl_t **ctl, snd_config_t *root, const char *name, const char *orig_name, int mode);
351 int snd_ctl_close(snd_ctl_t *ctl);
352 int snd_ctl_nonblock(snd_ctl_t *ctl, int nonblock);
353 static __inline__ int snd_ctl_abort(snd_ctl_t *ctl) { return snd_ctl_nonblock(ctl, 2); }
355  snd_async_callback_t callback, void *private_data);
358 int snd_ctl_poll_descriptors(snd_ctl_t *ctl, struct pollfd *pfds, unsigned int space);
359 int snd_ctl_poll_descriptors_revents(snd_ctl_t *ctl, struct pollfd *pfds, unsigned int nfds, unsigned short *revents);
360 int snd_ctl_subscribe_events(snd_ctl_t *ctl, int subscribe);
369  unsigned int *tlv, unsigned int tlv_size);
371  const unsigned int *tlv);
373  const unsigned int *tlv);
374 #ifdef __ALSA_HWDEP_H
375 int snd_ctl_hwdep_next_device(snd_ctl_t *ctl, int * device);
377 #endif
378 #ifdef __ALSA_PCM_H
379 int snd_ctl_pcm_next_device(snd_ctl_t *ctl, int *device);
380 int snd_ctl_pcm_info(snd_ctl_t *ctl, snd_pcm_info_t * info);
381 int snd_ctl_pcm_prefer_subdevice(snd_ctl_t *ctl, int subdev);
382 #endif
383 #ifdef __ALSA_RAWMIDI_H
384 int snd_ctl_rawmidi_next_device(snd_ctl_t *ctl, int * device);
386 int snd_ctl_rawmidi_prefer_subdevice(snd_ctl_t *ctl, int subdev);
387 #endif
388 int snd_ctl_set_power_state(snd_ctl_t *ctl, unsigned int state);
389 int snd_ctl_get_power_state(snd_ctl_t *ctl, unsigned int *state);
390 
391 int snd_ctl_read(snd_ctl_t *ctl, snd_ctl_event_t *event);
392 int snd_ctl_wait(snd_ctl_t *ctl, int timeout);
393 const char *snd_ctl_name(snd_ctl_t *ctl);
395 
399 
400 unsigned int snd_ctl_event_elem_get_mask(const snd_ctl_event_t *obj);
401 unsigned int snd_ctl_event_elem_get_numid(const snd_ctl_event_t *obj);
404 unsigned int snd_ctl_event_elem_get_device(const snd_ctl_event_t *obj);
405 unsigned int snd_ctl_event_elem_get_subdevice(const snd_ctl_event_t *obj);
406 const char *snd_ctl_event_elem_get_name(const snd_ctl_event_t *obj);
407 unsigned int snd_ctl_event_elem_get_index(const snd_ctl_event_t *obj);
408 
409 int snd_ctl_elem_list_alloc_space(snd_ctl_elem_list_t *obj, unsigned int entries);
411 
413 int snd_ctl_ascii_elem_id_parse(snd_ctl_elem_id_t *dst, const char *str);
416  snd_ctl_elem_info_t *info,
417  const char *value);
418 
419 size_t snd_ctl_elem_id_sizeof(void);
424 #define snd_ctl_elem_id_alloca(ptr) __snd_alloca(ptr, snd_ctl_elem_id)
431 unsigned int snd_ctl_elem_id_get_numid(const snd_ctl_elem_id_t *obj);
433 unsigned int snd_ctl_elem_id_get_device(const snd_ctl_elem_id_t *obj);
434 unsigned int snd_ctl_elem_id_get_subdevice(const snd_ctl_elem_id_t *obj);
435 const char *snd_ctl_elem_id_get_name(const snd_ctl_elem_id_t *obj);
436 unsigned int snd_ctl_elem_id_get_index(const snd_ctl_elem_id_t *obj);
437 void snd_ctl_elem_id_set_numid(snd_ctl_elem_id_t *obj, unsigned int val);
439 void snd_ctl_elem_id_set_device(snd_ctl_elem_id_t *obj, unsigned int val);
440 void snd_ctl_elem_id_set_subdevice(snd_ctl_elem_id_t *obj, unsigned int val);
441 void snd_ctl_elem_id_set_name(snd_ctl_elem_id_t *obj, const char *val);
442 void snd_ctl_elem_id_set_index(snd_ctl_elem_id_t *obj, unsigned int val);
443 
444 size_t snd_ctl_card_info_sizeof(void);
449 #define snd_ctl_card_info_alloca(ptr) __snd_alloca(ptr, snd_ctl_card_info)
455 const char *snd_ctl_card_info_get_id(const snd_ctl_card_info_t *obj);
456 const char *snd_ctl_card_info_get_driver(const snd_ctl_card_info_t *obj);
457 const char *snd_ctl_card_info_get_name(const snd_ctl_card_info_t *obj);
461 
462 size_t snd_ctl_event_sizeof(void);
467 #define snd_ctl_event_alloca(ptr) __snd_alloca(ptr, snd_ctl_event)
471 void snd_ctl_event_copy(snd_ctl_event_t *dst, const snd_ctl_event_t *src);
473 
474 size_t snd_ctl_elem_list_sizeof(void);
475 
485 #define snd_ctl_elem_list_alloca(ptr) __snd_alloca(ptr, snd_ctl_elem_list)
486 
491 void snd_ctl_elem_list_set_offset(snd_ctl_elem_list_t *obj, unsigned int val);
492 unsigned int snd_ctl_elem_list_get_used(const snd_ctl_elem_list_t *obj);
493 unsigned int snd_ctl_elem_list_get_count(const snd_ctl_elem_list_t *obj);
494 void snd_ctl_elem_list_get_id(const snd_ctl_elem_list_t *obj, unsigned int idx, snd_ctl_elem_id_t *ptr);
495 unsigned int snd_ctl_elem_list_get_numid(const snd_ctl_elem_list_t *obj, unsigned int idx);
497 unsigned int snd_ctl_elem_list_get_device(const snd_ctl_elem_list_t *obj, unsigned int idx);
498 unsigned int snd_ctl_elem_list_get_subdevice(const snd_ctl_elem_list_t *obj, unsigned int idx);
499 const char *snd_ctl_elem_list_get_name(const snd_ctl_elem_list_t *obj, unsigned int idx);
500 unsigned int snd_ctl_elem_list_get_index(const snd_ctl_elem_list_t *obj, unsigned int idx);
501 
502 size_t snd_ctl_elem_info_sizeof(void);
507 #define snd_ctl_elem_info_alloca(ptr) __snd_alloca(ptr, snd_ctl_elem_info)
524 unsigned int snd_ctl_elem_info_get_count(const snd_ctl_elem_info_t *obj);
531 unsigned int snd_ctl_elem_info_get_items(const snd_ctl_elem_info_t *obj);
532 void snd_ctl_elem_info_set_item(snd_ctl_elem_info_t *obj, unsigned int val);
535 int snd_ctl_elem_info_get_dimension(const snd_ctl_elem_info_t *obj, unsigned int idx);
537  const int dimension[4]);
539 unsigned int snd_ctl_elem_info_get_numid(const snd_ctl_elem_info_t *obj);
541 unsigned int snd_ctl_elem_info_get_device(const snd_ctl_elem_info_t *obj);
543 const char *snd_ctl_elem_info_get_name(const snd_ctl_elem_info_t *obj);
544 unsigned int snd_ctl_elem_info_get_index(const snd_ctl_elem_info_t *obj);
546 void snd_ctl_elem_info_set_numid(snd_ctl_elem_info_t *obj, unsigned int val);
548 void snd_ctl_elem_info_set_device(snd_ctl_elem_info_t *obj, unsigned int val);
549 void snd_ctl_elem_info_set_subdevice(snd_ctl_elem_info_t *obj, unsigned int val);
550 void snd_ctl_elem_info_set_name(snd_ctl_elem_info_t *obj, const char *val);
551 void snd_ctl_elem_info_set_index(snd_ctl_elem_info_t *obj, unsigned int val);
552 void snd_ctl_elem_info_set_read_write(snd_ctl_elem_info_t *obj, int rval, int wval);
553 void snd_ctl_elem_info_set_tlv_read_write(snd_ctl_elem_info_t *obj, int rval, int wval);
555 
557  unsigned int element_count,
558  unsigned int member_count,
559  long min, long max, long step);
561  unsigned int element_count,
562  unsigned int member_count,
563  long long min, long long max,
564  long long step);
566  unsigned int element_count,
567  unsigned int member_count);
569  unsigned int element_count,
570  unsigned int member_count,
571  unsigned int items,
572  const char *const labels[]);
574  unsigned int element_count,
575  unsigned int member_count);
576 
577 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);
578 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);
579 int snd_ctl_elem_add_boolean(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id, unsigned int count);
580 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[]);
583 
584 size_t snd_ctl_elem_value_sizeof(void);
585 
597 #define snd_ctl_elem_value_alloca(ptr) __snd_alloca(ptr, snd_ctl_elem_value)
598 
605 unsigned int snd_ctl_elem_value_get_numid(const snd_ctl_elem_value_t *obj);
607 unsigned int snd_ctl_elem_value_get_device(const snd_ctl_elem_value_t *obj);
609 const char *snd_ctl_elem_value_get_name(const snd_ctl_elem_value_t *obj);
610 unsigned int snd_ctl_elem_value_get_index(const snd_ctl_elem_value_t *obj);
612 void snd_ctl_elem_value_set_numid(snd_ctl_elem_value_t *obj, unsigned int val);
614 void snd_ctl_elem_value_set_device(snd_ctl_elem_value_t *obj, unsigned int val);
615 void snd_ctl_elem_value_set_subdevice(snd_ctl_elem_value_t *obj, unsigned int val);
616 void snd_ctl_elem_value_set_name(snd_ctl_elem_value_t *obj, const char *val);
617 void snd_ctl_elem_value_set_index(snd_ctl_elem_value_t *obj, unsigned int val);
618 int snd_ctl_elem_value_get_boolean(const snd_ctl_elem_value_t *obj, unsigned int idx);
619 long snd_ctl_elem_value_get_integer(const snd_ctl_elem_value_t *obj, unsigned int idx);
620 long long snd_ctl_elem_value_get_integer64(const snd_ctl_elem_value_t *obj, unsigned int idx);
621 unsigned int snd_ctl_elem_value_get_enumerated(const snd_ctl_elem_value_t *obj, unsigned int idx);
622 unsigned char snd_ctl_elem_value_get_byte(const snd_ctl_elem_value_t *obj, unsigned int idx);
623 void snd_ctl_elem_value_set_boolean(snd_ctl_elem_value_t *obj, unsigned int idx, long val);
624 void snd_ctl_elem_value_set_integer(snd_ctl_elem_value_t *obj, unsigned int idx, long val);
625 void snd_ctl_elem_value_set_integer64(snd_ctl_elem_value_t *obj, unsigned int idx, long long val);
626 void snd_ctl_elem_value_set_enumerated(snd_ctl_elem_value_t *obj, unsigned int idx, unsigned int val);
627 void snd_ctl_elem_value_set_byte(snd_ctl_elem_value_t *obj, unsigned int idx, unsigned char val);
628 void snd_ctl_elem_set_bytes(snd_ctl_elem_value_t *obj, void *data, size_t size);
629 const void * snd_ctl_elem_value_get_bytes(const snd_ctl_elem_value_t *obj);
632 
633 int snd_tlv_parse_dB_info(unsigned int *tlv, unsigned int tlv_size,
634  unsigned int **db_tlvp);
635 int snd_tlv_get_dB_range(unsigned int *tlv, long rangemin, long rangemax,
636  long *min, long *max);
637 int snd_tlv_convert_to_dB(unsigned int *tlv, long rangemin, long rangemax,
638  long volume, long *db_gain);
639 int snd_tlv_convert_from_dB(unsigned int *tlv, long rangemin, long rangemax,
640  long db_gain, long *value, int xdir);
642  long *min, long *max);
644  long volume, long *db_gain);
646  long db_gain, long *value, int xdir);
647 
657 typedef struct _snd_hctl_elem snd_hctl_elem_t;
658 
660 typedef struct _snd_hctl snd_hctl_t;
661 
668 typedef int (*snd_hctl_compare_t)(const snd_hctl_elem_t *e1,
669  const snd_hctl_elem_t *e2);
671  const snd_hctl_elem_t *c2);
679 typedef int (*snd_hctl_callback_t)(snd_hctl_t *hctl,
680  unsigned int mask,
681  snd_hctl_elem_t *elem);
689  unsigned int mask);
690 
691 int snd_hctl_open(snd_hctl_t **hctl, const char *name, int mode);
692 int snd_hctl_open_ctl(snd_hctl_t **hctlp, snd_ctl_t *ctl);
693 int snd_hctl_close(snd_hctl_t *hctl);
694 int snd_hctl_nonblock(snd_hctl_t *hctl, int nonblock);
695 static __inline__ int snd_hctl_abort(snd_hctl_t *hctl) { return snd_hctl_nonblock(hctl, 2); }
697 int snd_hctl_poll_descriptors(snd_hctl_t *hctl, struct pollfd *pfds, unsigned int space);
698 int snd_hctl_poll_descriptors_revents(snd_hctl_t *ctl, struct pollfd *pfds, unsigned int nfds, unsigned short *revents);
699 unsigned int snd_hctl_get_count(snd_hctl_t *hctl);
705 void snd_hctl_set_callback_private(snd_hctl_t *hctl, void *data);
707 int snd_hctl_load(snd_hctl_t *hctl);
708 int snd_hctl_free(snd_hctl_t *hctl);
710 const char *snd_hctl_name(snd_hctl_t *hctl);
711 int snd_hctl_wait(snd_hctl_t *hctl, int timeout);
713 
719 int snd_hctl_elem_tlv_read(snd_hctl_elem_t *elem, unsigned int *tlv, unsigned int tlv_size);
720 int snd_hctl_elem_tlv_write(snd_hctl_elem_t *elem, const unsigned int *tlv);
721 int snd_hctl_elem_tlv_command(snd_hctl_elem_t *elem, const unsigned int *tlv);
722 
724 
726 unsigned int snd_hctl_elem_get_numid(const snd_hctl_elem_t *obj);
728 unsigned int snd_hctl_elem_get_device(const snd_hctl_elem_t *obj);
729 unsigned int snd_hctl_elem_get_subdevice(const snd_hctl_elem_t *obj);
730 const char *snd_hctl_elem_get_name(const snd_hctl_elem_t *obj);
731 unsigned int snd_hctl_elem_get_index(const snd_hctl_elem_t *obj);
735 
747 int snd_sctl_build(snd_sctl_t **ctl, snd_ctl_t *handle, snd_config_t *config,
748  snd_config_t *private_data, int mode);
749 int snd_sctl_free(snd_sctl_t *handle);
750 int snd_sctl_install(snd_sctl_t *handle);
751 int snd_sctl_remove(snd_sctl_t *handle);
752 
755 #ifdef __cplusplus
756 }
757 #endif
758 
759 #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:2819
int snd_ctl_hwdep_next_device(snd_ctl_t *ctl, int *device)
Get next hardware dependent device number.
Definition: control.c:1132
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:3377
Definition: control.h:315
const char * snd_ctl_elem_iface_name(snd_ctl_elem_iface_t iface)
get name of a CTL element related interface
Definition: control.c:1621
size_t snd_ctl_event_sizeof(void)
get size of snd_ctl_event_t
Definition: control.c:2162
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:2681
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:3028
size_t snd_ctl_elem_list_sizeof(void)
get size of snd_ctl_elem_list_t.
Definition: control.c:2225
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:186
struct _snd_ctl_card_info snd_ctl_card_info_t
Definition: control.h:54
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:500
int snd_card_next(int *card)
Try to determine the next card.
Definition: cards.c:98
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:3107
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:2717
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:2857
int snd_ctl_rawmidi_info(snd_ctl_t *ctl, snd_rawmidi_info_t *info)
Get info about a RawMidi device.
Definition: control.c:1204
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:219
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:2923
void snd_ctl_card_info_copy(snd_ctl_card_info_t *dst, const snd_ctl_card_info_t *src)
copy one snd_ctl_card_info_t to another
Definition: control.c:2075
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:660
int snd_ctl_pcm_next_device(snd_ctl_t *ctl, int *device)
Get next PCM device number.
Definition: control.c:1156
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:2787
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:3207
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:2589
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:2501
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:2879
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:2490
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:2336
Definition: control.h:190
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:3179
int snd_card_load(int card)
Try to load the driver for a card.
Definition: cards.c:83
Definition: control.h:313
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:2740
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:1705
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:1968
pid_t snd_ctl_elem_info_get_owner(const snd_ctl_elem_info_t *obj)
Get owner of a locked element.
Definition: control.c:2623
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:3306
Definition: control.h:226
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:3071
int snd_ctl_elem_info_is_locked(const snd_ctl_elem_info_t *obj)
Get info whether an element is locked.
Definition: control.c:2545
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:3413
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:2204
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:1935
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:2657
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:3560
int snd_ctl_event_malloc(snd_ctl_event_t **ptr)
allocate an invalid snd_ctl_event_t using standard malloc
Definition: control.c:2172
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:3524
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:283
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:3341
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:330
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:198
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:1069
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:3236
void snd_ctl_elem_id_clear(snd_ctl_elem_id_t *obj)
clear given snd_ctl_elem_id_t object
Definition: control.c:1816
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:3151
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:3165
void snd_ctl_elem_info_clear(snd_ctl_elem_info_t *obj)
clear given snd_ctl_elem_info_t object
Definition: control.c:2469
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:2215
struct _snd_ctl_elem_value snd_ctl_elem_value_t
Definition: control.h:180
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:2645
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:1753
int snd_ctl_elem_unlock(snd_ctl_t *ctl, snd_ctl_elem_id_t *id)
Unlock CTL element.
Definition: control.c:1120
int snd_ctl_nonblock(snd_ctl_t *ctl, int nonblock)
set nonblock mode
Definition: control.c:214
snd_ctl_elem_iface_t
Definition: control.h:205
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:2868
Definition: control.h:217
snd_ctl_type_t
Definition: control.h:307
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:858
int snd_ctl_card_info(snd_ctl_t *ctl, snd_ctl_card_info_t *info)
Get card related information.
Definition: control.c:337
int(* snd_hctl_callback_t)(snd_hctl_t *hctl, unsigned int mask, snd_hctl_elem_t *elem)
HCTL callback function.
Definition: control.h:679
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:2387
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:1717
const char * snd_ctl_card_info_get_mixername(const snd_ctl_card_info_t *obj)
Get card mixer name from a CTL card info.
Definition: control.c:2141
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:2361
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:1924
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:1873
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:1826
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:2729
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:1094
int snd_ctl_open(snd_ctl_t **ctl, const char *name, int mode)
Opens a CTL.
Definition: control.c:1517
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:2989
int snd_ctl_elem_lock(snd_ctl_t *ctl, snd_ctl_elem_id_t *id)
Lock CTL element.
Definition: control.c:1108
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:2318
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:1693
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:1913
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:3001
Definition: control.h:194
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:1681
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:2669
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:2023
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:3123
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:582
int snd_ctl_pcm_prefer_subdevice(snd_ctl_t *ctl, int subdev)
Set preferred PCM subdevice number of successive PCM open.
Definition: control.c:1180
void snd_ctl_card_info_free(snd_ctl_card_info_t *obj)
frees a previously allocated snd_ctl_card_info_t
Definition: control.c:2056
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:2413
int snd_ctl_elem_info_is_owner(const snd_ctl_elem_info_t *obj)
Get info if I own an element.
Definition: control.c:2556
struct _snd_ctl_elem_list snd_ctl_elem_list_t
Definition: control.h:128
struct _snd_ctl_elem_id snd_ctl_elem_id_t
Definition: control.h:57
int snd_ctl_elem_list(snd_ctl_t *ctl, snd_ctl_elem_list_t *list)
Get a list of element identifiers.
Definition: control.c:364
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:717
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:3485
Definition: control.h:213
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:3292
int snd_ctl_elem_info_get_dimensions(const snd_ctl_elem_info_t *obj)
Get count of dimensions for given element.
Definition: control.c:2758
const char * snd_ctl_event_type_name(snd_ctl_event_type_t type)
get name of a CTL event type
Definition: control.c:1632
void snd_ctl_elem_value_clear(snd_ctl_elem_value_t *obj)
Clear given data of an element.
Definition: control.c:3083
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:2600
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:2001
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:3278
int snd_ctl_read(snd_ctl_t *ctl, snd_ctl_event_t *event)
Read an event.
Definition: control.c:1256
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:2846
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 snd_ctl_card_info_t object
Definition: control.c:2065
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:2012
int snd_ctl_poll_descriptors_count(snd_ctl_t *ctl)
get count of poll descriptors for CTL handle
Definition: control.c:266
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:2290
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:2705
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:2956
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:1765
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:2934
int snd_ctl_pcm_info(snd_ctl_t *ctl, snd_pcm_info_t *info)
Get info about a PCM device.
Definition: control.c:1168
int snd_ctl_card_info_get_card(const snd_ctl_card_info_t *obj)
Get card number from a CTL card info.
Definition: control.c:2086
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:2301
void snd_ctl_event_clear(snd_ctl_event_t *obj)
clear given snd_ctl_event_t object
Definition: control.c:2194
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:377
snd_ctl_t * snd_async_handler_get_ctl(snd_async_handler_t *handler)
Return CTL handle related to an async handler.
Definition: control.c:1341
int snd_card_get_name(int card, char **name)
Obtain the card name.
Definition: cards.c:173
int snd_ctl_elem_remove(snd_ctl_t *ctl, snd_ctl_elem_id_t *id)
Remove an user CTL element.
Definition: control.c:941
size_t snd_ctl_elem_value_sizeof(void)
Get size of data structure for an element.
Definition: control.c:3039
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:1268
Definition: control.h:209
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:2693
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:2890
int snd_ctl_hwdep_info(snd_ctl_t *ctl, snd_hwdep_info_t *info)
Get info about a hardware dependent device.
Definition: control.c:1144
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:3323
int snd_ctl_card_info_malloc(snd_ctl_card_info_t **ptr)
allocate an invalid snd_ctl_card_info_t using standard malloc
Definition: control.c:2043
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:194
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:196
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:324
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:306
size_t snd_ctl_card_info_sizeof(void)
get size of snd_ctl_card_info_t
Definition: control.c:2033
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:2523
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:922
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:1669
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:2901
const char * snd_ctl_card_info_get_components(const snd_ctl_card_info_t *obj)
Get card component list from a CTL card info.
Definition: control.c:2152
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:3431
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:3250
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:1902
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:1946
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:1843
const char * snd_hctl_name(snd_hctl_t *hctl)
get identifier of HCTL handle
Definition: hcontrol.c:130
Definition: control.h:309
void snd_ctl_elem_list_free(snd_ctl_elem_list_t *obj)
frees a previously allocated snd_ctl_elem_list_t.
Definition: control.c:2259
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:2967
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 card long name from a CTL card info.
Definition: control.c:2130
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:2447
int snd_ctl_rawmidi_next_device(snd_ctl_t *ctl, int *device)
Get next RawMidi device number.
Definition: control.c:1192
struct _snd_ctl_elem_info snd_ctl_elem_info_t
Definition: control.h:131
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:3093
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:3222
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:2238
Definition: control.h:192
Definition: control.h:207
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:2578
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:3056
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:797
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:2374
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:668
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:2512
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:3137
size_t snd_ctl_elem_info_sizeof(void)
get size of snd_ctl_elem_info_t
Definition: control.c:2437
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:3505
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:1957
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:1311
int snd_ctl_get_power_state(snd_ctl_t *ctl, unsigned int *state)
Get actual Power State.
Definition: control.c:1242
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:3193
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:1561
int snd_ctl_rawmidi_prefer_subdevice(snd_ctl_t *ctl, int subdev)
Set preferred RawMidi subdevice number of successive RawMidi open.
Definition: control.c:1216
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:1228
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:2348
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:183
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:2534
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:1741
const char * snd_ctl_name(snd_ctl_t *ctl)
get identifier of CTL handle
Definition: control.c:167
void snd_ctl_event_free(snd_ctl_event_t *obj)
frees a previously allocated snd_ctl_event_t
Definition: control.c:2185
int snd_ctl_elem_read(snd_ctl_t *ctl, snd_ctl_elem_value_t *data)
Get CTL element value.
Definition: control.c:962
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:1729
struct _snd_hctl snd_hctl_t
Definition: control.h:660
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:816
int snd_card_get_index(const char *name)
Convert card string to an integer value.
Definition: cards.c:125
const char * snd_ctl_card_info_get_name(const snd_ctl_card_info_t *obj)
Get card name from a CTL card info.
Definition: control.c:2119
struct _snd_config snd_config_t
Internal structure for a configuration node object.
Definition: conf.h:69
Definition: control.h:211
struct _snd_hctl_elem snd_hctl_elem_t
Definition: control.h:657
Definition: control.h:311
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:2400
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:3449
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:2426
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:1979
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:837
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:879
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:2978
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:2634
snd_ctl_type_t snd_ctl_type(snd_ctl_t *ctl)
get type of CTL handle
Definition: control.c:180
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:1649
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:2912
const char * snd_ctl_elem_type_name(snd_ctl_elem_type_t type)
get name of a CTL element type
Definition: control.c:1610
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:1794
snd_ctl_event_type_t
Definition: control.h:224
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:3015
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:1545
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:1990
const char * snd_ctl_card_info_get_driver(const snd_ctl_card_info_t *obj)
Get card driver name from a CTL card info.
Definition: control.c:2108
Definition: control.h:317
struct _snd_sctl snd_sctl_t
Definition: control.h:336
Definition: control.h:200
void * ptr
Definition: seq_event.h:199
int snd_card_get_longname(int card, char **name)
Obtain the card long name.
Definition: cards.c:203
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:2276
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:2945
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:3264
const char * snd_ctl_card_info_get_id(const snd_ctl_card_info_t *obj)
Get card identifier from a CTL card info.
Definition: control.c:2097
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:3359
int snd_ctl_elem_write(snd_ctl_t *ctl, snd_ctl_elem_value_t *data)
Set CTL element value.
Definition: control.c:983
Definition: control.h:215
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:3467
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:2479
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:3395
size_t snd_ctl_elem_id_sizeof(void)
get size of snd_ctl_elem_id_t
Definition: control.c:1784
void snd_ctl_elem_info_free(snd_ctl_elem_info_t *obj)
frees a previously allocated snd_ctl_elem_info_t
Definition: control.c:2460
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:3542
Definition: control.h:188
int(* snd_hctl_elem_callback_t)(snd_hctl_elem_t *elem, unsigned int mask)
HCTL element callback function.
Definition: control.h:688
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:1032
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:1807
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:2567