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 #if !defined(__ASOUNDLIB_H) && !defined(ALSA_LIBRARY_BUILD)
29 /* don't use ALSA_LIBRARY_BUILD define in sources outside alsa-lib */
30 #warning "use #include <alsa/asoundlib.h>, <alsa/control.h> should not be used directly"
31 #include <alsa/asoundlib.h>
32 #endif
33 
34 #ifndef __ALSA_CONTROL_H
35 #define __ALSA_CONTROL_H
36 
37 #ifdef __cplusplus
38 extern "C" {
39 #endif
40 
49 #define SND_CONTROL_DLSYM_VERSION _dlsym_control_001
50 
52 typedef struct snd_aes_iec958 {
53  unsigned char status[24];
54  unsigned char subcode[147];
55  unsigned char pad;
56  unsigned char dig_subframe[4];
58 
85 typedef struct _snd_ctl_card_info snd_ctl_card_info_t;
86 
88 typedef struct _snd_ctl_elem_id snd_ctl_elem_id_t;
89 
159 typedef struct _snd_ctl_elem_list snd_ctl_elem_list_t;
160 
162 typedef struct _snd_ctl_elem_info snd_ctl_elem_info_t;
163 
216 typedef struct _snd_ctl_elem_value snd_ctl_elem_value_t;
217 
219 typedef struct _snd_ctl_event snd_ctl_event_t;
220 
222 typedef enum _snd_ctl_elem_type {
237  SND_CTL_ELEM_TYPE_LAST = SND_CTL_ELEM_TYPE_INTEGER64
239 
241 typedef enum _snd_ctl_elem_iface {
256  SND_CTL_ELEM_IFACE_LAST = SND_CTL_ELEM_IFACE_SEQUENCER
258 
260 typedef enum _snd_ctl_event_type {
263  SND_CTL_EVENT_LAST = SND_CTL_EVENT_ELEM
265 
268 #define SND_CTL_EVENT_MASK_REMOVE (~0U)
269 
270 #define SND_CTL_EVENT_MASK_VALUE (1<<0)
271 
272 #define SND_CTL_EVENT_MASK_INFO (1<<1)
273 
274 #define SND_CTL_EVENT_MASK_ADD (1<<2)
275 
276 #define SND_CTL_EVENT_MASK_TLV (1<<3)
277 
279 #define SND_CTL_NAME_NONE ""
280 
281 #define SND_CTL_NAME_PLAYBACK "Playback "
282 
283 #define SND_CTL_NAME_CAPTURE "Capture "
284 
286 #define SND_CTL_NAME_IEC958_NONE ""
287 
288 #define SND_CTL_NAME_IEC958_SWITCH "Switch"
289 
290 #define SND_CTL_NAME_IEC958_VOLUME "Volume"
291 
292 #define SND_CTL_NAME_IEC958_DEFAULT "Default"
293 
294 #define SND_CTL_NAME_IEC958_MASK "Mask"
295 
296 #define SND_CTL_NAME_IEC958_CON_MASK "Con Mask"
297 
298 #define SND_CTL_NAME_IEC958_PRO_MASK "Pro Mask"
299 
300 #define SND_CTL_NAME_IEC958_PCM_STREAM "PCM Stream"
301 
302 #define SND_CTL_NAME_IEC958(expl,direction,what) "IEC958 " expl SND_CTL_NAME_##direction SND_CTL_NAME_IEC958_##what
303 
305 #define SND_CTL_POWER_MASK 0xff00
306 
307 #define SND_CTL_POWER_D0 0x0000
308 
309 #define SND_CTL_POWER_D1 0x0100
310 
311 #define SND_CTL_POWER_D2 0x0200
312 
313 #define SND_CTL_POWER_D3 0x0300
314 
315 #define SND_CTL_POWER_D3hot (SND_CTL_POWER_D3|0x0000)
316 
317 #define SND_CTL_POWER_D3cold (SND_CTL_POWER_D3|0x0001)
318 
320 #define SND_CTL_TLVT_CONTAINER 0x0000
321 
322 #define SND_CTL_TLVT_DB_SCALE 0x0001
323 
324 #define SND_CTL_TLVT_DB_LINEAR 0x0002
325 
326 #define SND_CTL_TLVT_DB_RANGE 0x0003
327 
328 #define SND_CTL_TLVT_DB_MINMAX 0x0004
329 
330 #define SND_CTL_TLVT_DB_MINMAX_MUTE 0x0005
331 
333 #define SND_CTL_TLV_DB_GAIN_MUTE -9999999
334 
336 #define SND_CTL_TLVT_CHMAP_FIXED 0x00101
337 
338 #define SND_CTL_TLVT_CHMAP_VAR 0x00102
339 
340 #define SND_CTL_TLVT_CHMAP_PAIRED 0x00103
341 
343 typedef enum _snd_ctl_type {
355 
357 #define SND_CTL_NONBLOCK 0x0001
358 
360 #define SND_CTL_ASYNC 0x0002
361 
363 #define SND_CTL_READONLY 0x0004
364 
366 #define SND_CTL_EINTR 0x0080
367 
369 typedef struct _snd_ctl snd_ctl_t;
370 
372 #define SND_SCTL_NOFREE 0x0001
373 
375 typedef struct _snd_sctl snd_sctl_t;
376 
377 int snd_card_load(int card);
378 int snd_card_next(int *card);
379 int snd_card_get_index(const char *name);
380 int snd_card_get_name(int card, char **name);
381 int snd_card_get_longname(int card, char **name);
382 
383 int snd_ctl_open(snd_ctl_t **ctl, const char *name, int mode);
384 int snd_ctl_open_lconf(snd_ctl_t **ctl, const char *name, int mode, snd_config_t *lconf);
385 int snd_ctl_open_fallback(snd_ctl_t **ctl, snd_config_t *root, const char *name, const char *orig_name, int mode);
386 int snd_ctl_close(snd_ctl_t *ctl);
387 int snd_ctl_nonblock(snd_ctl_t *ctl, int nonblock);
388 static __inline__ int snd_ctl_abort(snd_ctl_t *ctl) { return snd_ctl_nonblock(ctl, 2); }
390  snd_async_callback_t callback, void *private_data);
393 int snd_ctl_poll_descriptors(snd_ctl_t *ctl, struct pollfd *pfds, unsigned int space);
394 int snd_ctl_poll_descriptors_revents(snd_ctl_t *ctl, struct pollfd *pfds, unsigned int nfds, unsigned short *revents);
395 int snd_ctl_subscribe_events(snd_ctl_t *ctl, int subscribe);
404  unsigned int *tlv, unsigned int tlv_size);
406  const unsigned int *tlv);
408  const unsigned int *tlv);
409 #ifdef __ALSA_HWDEP_H
410 int snd_ctl_hwdep_next_device(snd_ctl_t *ctl, int * device);
412 #endif
413 #ifdef __ALSA_PCM_H
414 int snd_ctl_pcm_next_device(snd_ctl_t *ctl, int *device);
415 int snd_ctl_pcm_info(snd_ctl_t *ctl, snd_pcm_info_t * info);
416 int snd_ctl_pcm_prefer_subdevice(snd_ctl_t *ctl, int subdev);
417 #endif
418 #ifdef __ALSA_RAWMIDI_H
419 int snd_ctl_rawmidi_next_device(snd_ctl_t *ctl, int * device);
421 int snd_ctl_rawmidi_prefer_subdevice(snd_ctl_t *ctl, int subdev);
422 #endif
423 #ifdef __ALSA_UMP_H
424 int snd_ctl_ump_next_device(snd_ctl_t *ctl, int *device);
427 #endif
428 int snd_ctl_set_power_state(snd_ctl_t *ctl, unsigned int state);
429 int snd_ctl_get_power_state(snd_ctl_t *ctl, unsigned int *state);
430 
431 int snd_ctl_read(snd_ctl_t *ctl, snd_ctl_event_t *event);
432 int snd_ctl_wait(snd_ctl_t *ctl, int timeout);
433 const char *snd_ctl_name(snd_ctl_t *ctl);
435 
439 
440 unsigned int snd_ctl_event_elem_get_mask(const snd_ctl_event_t *obj);
441 unsigned int snd_ctl_event_elem_get_numid(const snd_ctl_event_t *obj);
444 unsigned int snd_ctl_event_elem_get_device(const snd_ctl_event_t *obj);
445 unsigned int snd_ctl_event_elem_get_subdevice(const snd_ctl_event_t *obj);
446 const char *snd_ctl_event_elem_get_name(const snd_ctl_event_t *obj);
447 unsigned int snd_ctl_event_elem_get_index(const snd_ctl_event_t *obj);
448 
449 int snd_ctl_elem_list_alloc_space(snd_ctl_elem_list_t *obj, unsigned int entries);
451 
453 int snd_ctl_ascii_elem_id_parse(snd_ctl_elem_id_t *dst, const char *str);
456  snd_ctl_elem_info_t *info,
457  const char *value);
458 
459 size_t snd_ctl_elem_id_sizeof(void);
464 #define snd_ctl_elem_id_alloca(ptr) __snd_alloca(ptr, snd_ctl_elem_id)
471 unsigned int snd_ctl_elem_id_get_numid(const snd_ctl_elem_id_t *obj);
473 unsigned int snd_ctl_elem_id_get_device(const snd_ctl_elem_id_t *obj);
474 unsigned int snd_ctl_elem_id_get_subdevice(const snd_ctl_elem_id_t *obj);
475 const char *snd_ctl_elem_id_get_name(const snd_ctl_elem_id_t *obj);
476 unsigned int snd_ctl_elem_id_get_index(const snd_ctl_elem_id_t *obj);
477 void snd_ctl_elem_id_set_numid(snd_ctl_elem_id_t *obj, unsigned int val);
479 void snd_ctl_elem_id_set_device(snd_ctl_elem_id_t *obj, unsigned int val);
480 void snd_ctl_elem_id_set_subdevice(snd_ctl_elem_id_t *obj, unsigned int val);
481 void snd_ctl_elem_id_set_name(snd_ctl_elem_id_t *obj, const char *val);
482 void snd_ctl_elem_id_set_index(snd_ctl_elem_id_t *obj, unsigned int val);
483 
484 size_t snd_ctl_card_info_sizeof(void);
485 
497 #define snd_ctl_card_info_alloca(ptr) __snd_alloca(ptr, snd_ctl_card_info)
498 
504 const char *snd_ctl_card_info_get_id(const snd_ctl_card_info_t *obj);
505 const char *snd_ctl_card_info_get_driver(const snd_ctl_card_info_t *obj);
506 const char *snd_ctl_card_info_get_name(const snd_ctl_card_info_t *obj);
510 
511 size_t snd_ctl_event_sizeof(void);
516 #define snd_ctl_event_alloca(ptr) __snd_alloca(ptr, snd_ctl_event)
520 void snd_ctl_event_copy(snd_ctl_event_t *dst, const snd_ctl_event_t *src);
522 
523 size_t snd_ctl_elem_list_sizeof(void);
524 
534 #define snd_ctl_elem_list_alloca(ptr) __snd_alloca(ptr, snd_ctl_elem_list)
535 
540 void snd_ctl_elem_list_set_offset(snd_ctl_elem_list_t *obj, unsigned int val);
541 unsigned int snd_ctl_elem_list_get_used(const snd_ctl_elem_list_t *obj);
542 unsigned int snd_ctl_elem_list_get_count(const snd_ctl_elem_list_t *obj);
543 void snd_ctl_elem_list_get_id(const snd_ctl_elem_list_t *obj, unsigned int idx, snd_ctl_elem_id_t *ptr);
544 unsigned int snd_ctl_elem_list_get_numid(const snd_ctl_elem_list_t *obj, unsigned int idx);
546 unsigned int snd_ctl_elem_list_get_device(const snd_ctl_elem_list_t *obj, unsigned int idx);
547 unsigned int snd_ctl_elem_list_get_subdevice(const snd_ctl_elem_list_t *obj, unsigned int idx);
548 const char *snd_ctl_elem_list_get_name(const snd_ctl_elem_list_t *obj, unsigned int idx);
549 unsigned int snd_ctl_elem_list_get_index(const snd_ctl_elem_list_t *obj, unsigned int idx);
550 
551 size_t snd_ctl_elem_info_sizeof(void);
556 #define snd_ctl_elem_info_alloca(ptr) __snd_alloca(ptr, snd_ctl_elem_info)
573 unsigned int snd_ctl_elem_info_get_count(const snd_ctl_elem_info_t *obj);
580 unsigned int snd_ctl_elem_info_get_items(const snd_ctl_elem_info_t *obj);
581 void snd_ctl_elem_info_set_item(snd_ctl_elem_info_t *obj, unsigned int val);
584 int snd_ctl_elem_info_get_dimension(const snd_ctl_elem_info_t *obj, unsigned int idx);
586  const int dimension[4]);
588 unsigned int snd_ctl_elem_info_get_numid(const snd_ctl_elem_info_t *obj);
590 unsigned int snd_ctl_elem_info_get_device(const snd_ctl_elem_info_t *obj);
592 const char *snd_ctl_elem_info_get_name(const snd_ctl_elem_info_t *obj);
593 unsigned int snd_ctl_elem_info_get_index(const snd_ctl_elem_info_t *obj);
595 void snd_ctl_elem_info_set_numid(snd_ctl_elem_info_t *obj, unsigned int val);
597 void snd_ctl_elem_info_set_device(snd_ctl_elem_info_t *obj, unsigned int val);
598 void snd_ctl_elem_info_set_subdevice(snd_ctl_elem_info_t *obj, unsigned int val);
599 void snd_ctl_elem_info_set_name(snd_ctl_elem_info_t *obj, const char *val);
600 void snd_ctl_elem_info_set_index(snd_ctl_elem_info_t *obj, unsigned int val);
601 void snd_ctl_elem_info_set_read_write(snd_ctl_elem_info_t *obj, int rval, int wval);
602 void snd_ctl_elem_info_set_tlv_read_write(snd_ctl_elem_info_t *obj, int rval, int wval);
604 
606  unsigned int element_count,
607  unsigned int member_count,
608  long min, long max, long step);
610  unsigned int element_count,
611  unsigned int member_count,
612  long long min, long long max,
613  long long step);
615  unsigned int element_count,
616  unsigned int member_count);
618  unsigned int element_count,
619  unsigned int member_count,
620  unsigned int items,
621  const char *const labels[]);
623  unsigned int element_count,
624  unsigned int member_count);
625 
626 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);
627 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);
628 int snd_ctl_elem_add_boolean(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id, unsigned int count);
629 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[]);
632 
633 size_t snd_ctl_elem_value_sizeof(void);
634 
646 #define snd_ctl_elem_value_alloca(ptr) __snd_alloca(ptr, snd_ctl_elem_value)
647 
654 unsigned int snd_ctl_elem_value_get_numid(const snd_ctl_elem_value_t *obj);
656 unsigned int snd_ctl_elem_value_get_device(const snd_ctl_elem_value_t *obj);
658 const char *snd_ctl_elem_value_get_name(const snd_ctl_elem_value_t *obj);
659 unsigned int snd_ctl_elem_value_get_index(const snd_ctl_elem_value_t *obj);
661 void snd_ctl_elem_value_set_numid(snd_ctl_elem_value_t *obj, unsigned int val);
663 void snd_ctl_elem_value_set_device(snd_ctl_elem_value_t *obj, unsigned int val);
664 void snd_ctl_elem_value_set_subdevice(snd_ctl_elem_value_t *obj, unsigned int val);
665 void snd_ctl_elem_value_set_name(snd_ctl_elem_value_t *obj, const char *val);
666 void snd_ctl_elem_value_set_index(snd_ctl_elem_value_t *obj, unsigned int val);
667 int snd_ctl_elem_value_get_boolean(const snd_ctl_elem_value_t *obj, unsigned int idx);
668 long snd_ctl_elem_value_get_integer(const snd_ctl_elem_value_t *obj, unsigned int idx);
669 long long snd_ctl_elem_value_get_integer64(const snd_ctl_elem_value_t *obj, unsigned int idx);
670 unsigned int snd_ctl_elem_value_get_enumerated(const snd_ctl_elem_value_t *obj, unsigned int idx);
671 unsigned char snd_ctl_elem_value_get_byte(const snd_ctl_elem_value_t *obj, unsigned int idx);
672 void snd_ctl_elem_value_set_boolean(snd_ctl_elem_value_t *obj, unsigned int idx, long val);
673 void snd_ctl_elem_value_set_integer(snd_ctl_elem_value_t *obj, unsigned int idx, long val);
674 void snd_ctl_elem_value_set_integer64(snd_ctl_elem_value_t *obj, unsigned int idx, long long val);
675 void snd_ctl_elem_value_set_enumerated(snd_ctl_elem_value_t *obj, unsigned int idx, unsigned int val);
676 void snd_ctl_elem_value_set_byte(snd_ctl_elem_value_t *obj, unsigned int idx, unsigned char val);
677 void snd_ctl_elem_set_bytes(snd_ctl_elem_value_t *obj, void *data, size_t size);
678 const void * snd_ctl_elem_value_get_bytes(const snd_ctl_elem_value_t *obj);
681 
682 int snd_tlv_parse_dB_info(unsigned int *tlv, unsigned int tlv_size,
683  unsigned int **db_tlvp);
684 int snd_tlv_get_dB_range(unsigned int *tlv, long rangemin, long rangemax,
685  long *min, long *max);
686 int snd_tlv_convert_to_dB(unsigned int *tlv, long rangemin, long rangemax,
687  long volume, long *db_gain);
688 int snd_tlv_convert_from_dB(unsigned int *tlv, long rangemin, long rangemax,
689  long db_gain, long *value, int xdir);
691  long *min, long *max);
693  long volume, long *db_gain);
695  long db_gain, long *value, int xdir);
696 
706 typedef struct _snd_hctl_elem snd_hctl_elem_t;
707 
709 typedef struct _snd_hctl snd_hctl_t;
710 
717 typedef int (*snd_hctl_compare_t)(const snd_hctl_elem_t *e1,
718  const snd_hctl_elem_t *e2);
720  const snd_hctl_elem_t *c2);
728 typedef int (*snd_hctl_callback_t)(snd_hctl_t *hctl,
729  unsigned int mask,
730  snd_hctl_elem_t *elem);
738  unsigned int mask);
739 
740 int snd_hctl_open(snd_hctl_t **hctl, const char *name, int mode);
741 int snd_hctl_open_ctl(snd_hctl_t **hctlp, snd_ctl_t *ctl);
742 int snd_hctl_close(snd_hctl_t *hctl);
743 int snd_hctl_nonblock(snd_hctl_t *hctl, int nonblock);
744 static __inline__ int snd_hctl_abort(snd_hctl_t *hctl) { return snd_hctl_nonblock(hctl, 2); }
746 int snd_hctl_poll_descriptors(snd_hctl_t *hctl, struct pollfd *pfds, unsigned int space);
747 int snd_hctl_poll_descriptors_revents(snd_hctl_t *ctl, struct pollfd *pfds, unsigned int nfds, unsigned short *revents);
748 unsigned int snd_hctl_get_count(snd_hctl_t *hctl);
756 int snd_hctl_load(snd_hctl_t *hctl);
757 int snd_hctl_free(snd_hctl_t *hctl);
759 const char *snd_hctl_name(snd_hctl_t *hctl);
760 int snd_hctl_wait(snd_hctl_t *hctl, int timeout);
762 
768 int snd_hctl_elem_tlv_read(snd_hctl_elem_t *elem, unsigned int *tlv, unsigned int tlv_size);
769 int snd_hctl_elem_tlv_write(snd_hctl_elem_t *elem, const unsigned int *tlv);
770 int snd_hctl_elem_tlv_command(snd_hctl_elem_t *elem, const unsigned int *tlv);
771 
773 
775 unsigned int snd_hctl_elem_get_numid(const snd_hctl_elem_t *obj);
777 unsigned int snd_hctl_elem_get_device(const snd_hctl_elem_t *obj);
778 unsigned int snd_hctl_elem_get_subdevice(const snd_hctl_elem_t *obj);
779 const char *snd_hctl_elem_get_name(const snd_hctl_elem_t *obj);
780 unsigned int snd_hctl_elem_get_index(const snd_hctl_elem_t *obj);
784 
796 int snd_sctl_build(snd_sctl_t **ctl, snd_ctl_t *handle, snd_config_t *config,
797  snd_config_t *private_data, int mode);
798 int snd_sctl_free(snd_sctl_t *handle);
799 int snd_sctl_install(snd_sctl_t *handle);
800 int snd_sctl_remove(snd_sctl_t *handle);
801 
812 int snd_device_name_hint(int card, const char *iface, void ***hints);
813 int snd_device_name_free_hint(void **hints);
814 char *snd_device_name_get_hint(const void *hint, const char *id);
815 
818 #ifdef __cplusplus
819 }
820 #endif
821 
822 #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
uint8_t data
Definition: ump_msg.h:188
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:2949
int snd_device_name_free_hint(void **hints)
Free a list of device name hints.
Definition: namehint.c:684
int snd_ctl_hwdep_next_device(snd_ctl_t *ctl, int *device)
Get next hardware dependent device number.
Definition: control.c:1183
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:3507
Definition: control.h:351
const char * snd_ctl_elem_iface_name(snd_ctl_elem_iface_t iface)
get name of a CTL element related interface
Definition: control.c:1717
size_t snd_ctl_event_sizeof(void)
get size of snd_ctl_event_t
Definition: control.c:2292
char * snd_device_name_get_hint(const void *hint, const char *id)
Extract a value from a hint.
Definition: namehint.c:712
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:2811
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:3158
size_t snd_ctl_elem_list_sizeof(void)
get size of snd_ctl_elem_list_t.
Definition: control.c:2355
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:222
struct _snd_ctl_card_info snd_ctl_card_info_t
CTL card info container.
Definition: control.h:85
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:551
int snd_card_next(int *card)
Iterate over physical sound cards.
Definition: cards.c:108
int snd_ctl_convert_from_dB(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id, long db_gain, long *value, int xdir)
Convert from dB gain to the raw volume value on the given control element.
Definition: tlv.c:508
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:3237
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:2847
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:2987
int snd_ctl_rawmidi_info(snd_ctl_t *ctl, snd_rawmidi_info_t *info)
Get info about a RawMidi device.
Definition: control.c:1255
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:485
Definition: control.h:255
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:3053
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:2184
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:711
int snd_ctl_pcm_next_device(snd_ctl_t *ctl, int *device)
Get next PCM device number.
Definition: control.c:1207
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:2917
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:3337
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:2719
uint8_t type
Definition: ump_msg.h:183
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:2631
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:3009
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:2620
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:2466
Definition: control.h:226
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:3309
int snd_card_load(int card)
Try to load the driver for a card.
Definition: cards.c:83
Definition: control.h:349
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:2870
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:1801
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:2064
uint8_t status
Definition: ump_msg.h:185
pid_t snd_ctl_elem_info_get_owner(const snd_ctl_elem_info_t *obj)
Get owner of a locked element.
Definition: control.c:2753
struct _snd_rawmidi_info snd_rawmidi_info_t
Definition: rawmidi.h:51
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:3436
Definition: control.h:262
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:52
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:3201
int snd_ctl_elem_info_is_locked(const snd_ctl_elem_info_t *obj)
Get info whether an element is locked.
Definition: control.c:2675
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:3543
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:2334
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:2031
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:2787
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:3690
int snd_ctl_event_malloc(snd_ctl_event_t **ptr)
allocate an invalid snd_ctl_event_t using standard malloc
Definition: control.c:2302
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:3654
Definition: control.h:52
int snd_ctl_poll_descriptors(snd_ctl_t *ctl, struct pollfd *pfds, unsigned int space)
get poll descriptors
Definition: control.c:326
long snd_ctl_elem_value_get_integer(const snd_ctl_elem_value_t *obj, unsigned int idx)
Get an element members value.
Definition: control.c:3471
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:369
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:234
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:1120
void(* snd_async_callback_t)(snd_async_handler_t *handler)
Async notification callback.
Definition: global.h:125
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:3366
void snd_ctl_elem_id_clear(snd_ctl_elem_id_t *obj)
clear given snd_ctl_elem_id_t object
Definition: control.c:1912
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:3281
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:3295
struct _snd_config snd_config_t
Internal structure for a configuration node object.
Definition: conf.h:74
void snd_ctl_elem_info_clear(snd_ctl_elem_info_t *obj)
clear given snd_ctl_elem_info_t object
Definition: control.c:2599
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:2345
struct _snd_ctl_elem_value snd_ctl_elem_value_t
Definition: control.h:216
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:2775
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:1849
int snd_ctl_elem_unlock(snd_ctl_t *ctl, snd_ctl_elem_id_t *id)
Unlock CTL element.
Definition: control.c:1171
int snd_ctl_nonblock(snd_ctl_t *ctl, int nonblock)
set nonblock mode
Definition: control.c:256
snd_ctl_elem_iface_t
Definition: control.h:241
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:2998
Definition: control.h:253
snd_ctl_type_t
Definition: control.h:343
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:909
int snd_ctl_card_info(snd_ctl_t *ctl, snd_ctl_card_info_t *info)
Get information about the sound card.
Definition: control.c:385
int(* snd_hctl_callback_t)(snd_hctl_t *hctl, unsigned int mask, snd_hctl_elem_t *elem)
HCTL callback function.
Definition: control.h:728
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:2517
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:1813
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:2268
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:2491
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:2020
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:1969
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:1922
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:2859
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:1145
int snd_ctl_open(snd_ctl_t **ctl, const char *name, int mode)
Opens a sound card.
Definition: control.c:1613
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:3119
int snd_ctl_elem_lock(snd_ctl_t *ctl, snd_ctl_elem_id_t *id)
Lock CTL element.
Definition: control.c:1159
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:2448
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:1789
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:2009
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:3131
Definition: control.h:230
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:1777
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:464
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:2799
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:2119
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:3253
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:633
int snd_ctl_pcm_prefer_subdevice(snd_ctl_t *ctl, int subdev)
Set preferred PCM subdevice number of successive PCM open.
Definition: control.c:1231
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:2161
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:2543
int snd_ctl_elem_info_is_owner(const snd_ctl_elem_info_t *obj)
Get info if I own an element.
Definition: control.c:2686
struct _snd_ctl_elem_list snd_ctl_elem_list_t
Definition: control.h:159
struct _snd_ctl_elem_id snd_ctl_elem_id_t
Definition: control.h:88
int snd_ctl_elem_list(snd_ctl_t *ctl, snd_ctl_elem_list_t *list)
Get a list of element identifiers.
Definition: control.c:412
int snd_ctl_add_enumerated_elem_set(snd_ctl_t *ctl, snd_ctl_elem_info_t *info, unsigned int element_count, unsigned int member_count, unsigned int items, const char *const labels[])
Create and add some user-defined control elements of enumerated type.
Definition: control.c:768
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:3615
Definition: control.h:249
int snd_ctl_ump_endpoint_info(snd_ctl_t *ctl, snd_ump_endpoint_info_t *info)
Get UMP Endpoint info about a UMP RawMidi device.
Definition: control.c:1293
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:3422
int snd_ctl_elem_info_get_dimensions(const snd_ctl_elem_info_t *obj)
Get count of dimensions for given element.
Definition: control.c:2888
const char * snd_ctl_event_type_name(snd_ctl_event_type_t type)
get name of a CTL event type
Definition: control.c:1728
void snd_ctl_elem_value_clear(snd_ctl_elem_value_t *obj)
Clear given data of an element.
Definition: control.c:3213
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:138
struct _snd_hwdep_info snd_hwdep_info_t
Definition: hwdep.h:51
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_device_name_hint(int card, const char *iface, void ***hints)
Get a set of device name hints.
Definition: namehint.c:583
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:2730
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:2097
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:3408
int snd_ctl_read(snd_ctl_t *ctl, snd_ctl_event_t *event)
Read an event.
Definition: control.c:1350
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:2976
char * snd_ctl_ascii_elem_id_get(snd_ctl_elem_id_t *id)
return ASCII CTL element identifier name
Definition: ctlparse.c:117
int snd_hctl_set_compare(snd_hctl_t *hctl, snd_hctl_compare_t hsort)
Change HCTL compare function and reorder elements.
Definition: hcontrol.c:448
void snd_ctl_card_info_clear(snd_ctl_card_info_t *obj)
Clear given card info object.
Definition: control.c:2173
struct snd_ump_block_info snd_ump_block_info_t
Definition: ump.h:33
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:2108
int snd_ctl_poll_descriptors_count(snd_ctl_t *ctl)
get count of poll descriptors for CTL handle
Definition: control.c:309
void snd_ctl_elem_list_copy(snd_ctl_elem_list_t *dst, const snd_ctl_elem_list_t *src)
copy one snd_ctl_elem_list_t to another.
Definition: control.c:2420
struct snd_ump_endpoint_info snd_ump_endpoint_info_t
Definition: ump.h:31
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:2835
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:3086
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:1861
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:3064
int snd_ctl_pcm_info(snd_ctl_t *ctl, snd_pcm_info_t *info)
Get info about a PCM device.
Definition: control.c:1219
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:2198
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:2431
void snd_ctl_event_clear(snd_ctl_event_t *obj)
clear given snd_ctl_event_t object
Definition: control.c:2324
unsigned int snd_hctl_elem_get_subdevice(const snd_hctl_elem_t *obj)
Get subdevice part of CTL element identifier of a CTL element id/value.
Definition: hcontrol.c:953
int snd_hctl_elem_info(snd_hctl_elem_t *elem, snd_ctl_elem_info_t *info)
Get information for an HCTL element.
Definition: hcontrol.c:805
int snd_ctl_elem_info(snd_ctl_t *ctl, snd_ctl_elem_info_t *info)
Get CTL element information.
Definition: control.c:425
snd_ctl_t * snd_async_handler_get_ctl(snd_async_handler_t *handler)
Return CTL handle related to an async handler.
Definition: control.c:1435
int snd_card_get_name(int card, char **name)
Obtain the card name.
Definition: cards.c:192
int snd_ctl_elem_remove(snd_ctl_t *ctl, snd_ctl_elem_id_t *id)
Remove an user CTL element.
Definition: control.c:992
size_t snd_ctl_elem_value_sizeof(void)
Get size of data structure for an element.
Definition: control.c:3169
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:1362
Definition: control.h:245
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:2823
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:3020
int snd_ctl_hwdep_info(snd_ctl_t *ctl, snd_hwdep_info_t *info)
Get info about a hardware dependent device.
Definition: control.c:1195
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:3453
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:2146
unsigned int snd_hctl_elem_get_numid(const snd_hctl_elem_t *obj)
Get element numeric identifier of a CTL element id/value.
Definition: hcontrol.c:920
int snd_ctl_close(snd_ctl_t *ctl)
close CTL handle
Definition: control.c:236
void snd_hctl_elem_set_callback_private(snd_hctl_elem_t *obj, void *val)
Set callback private value for an HCTL element.
Definition: hcontrol.c:997
int snd_tlv_convert_from_dB(unsigned int *tlv, long rangemin, long rangemax, long db_gain, long *value, int xdir)
Convert from dB gain to the corresponding raw value.
Definition: tlv.c:302
Definition: control.h:232
int snd_ctl_subscribe_events(snd_ctl_t *ctl, int subscribe)
Ask to be informed about events (poll, snd_async_add_ctl_handler, snd_ctl_read)
Definition: control.c:367
int snd_ctl_poll_descriptors_revents(snd_ctl_t *ctl, struct pollfd *pfds, unsigned int nfds, unsigned short *revents)
get returned events from poll descriptors
Definition: control.c:349
size_t snd_ctl_card_info_sizeof(void)
get size of snd_ctl_card_info_t.
Definition: control.c:2129
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:2653
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:973
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:1765
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:3031
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:2282
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:3561
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:3380
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:1998
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:2042
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:210
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:1939
const char * snd_hctl_name(snd_hctl_t *hctl)
get identifier of HCTL handle
Definition: hcontrol.c:130
Definition: control.h:345
void snd_ctl_elem_list_free(snd_ctl_elem_list_t *obj)
frees a previously allocated snd_ctl_elem_list_t.
Definition: control.c:2389
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:3097
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:61
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:2254
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:2577
int snd_ctl_ump_block_info(snd_ctl_t *ctl, snd_ump_block_info_t *info)
Get UMP Block info about a UMP RawMidi device.
Definition: control.c:1308
int snd_ctl_rawmidi_next_device(snd_ctl_t *ctl, int *device)
Get next RawMidi device number.
Definition: control.c:1243
struct _snd_ctl_elem_info snd_ctl_elem_info_t
Definition: control.h:162
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:3223
int snd_ctl_ump_next_device(snd_ctl_t *ctl, int *device)
Get next UMP device number.
Definition: control.c:1279
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:3352
struct _snd_async_handler snd_async_handler_t
Internal structure for an async notification client handler.
Definition: global.h:118
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:2368
Definition: control.h:228
Definition: control.h:243
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:2708
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:3186
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:848
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:2504
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:717
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:2642
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:3267
size_t snd_ctl_elem_info_sizeof(void)
get size of snd_ctl_elem_info_t
Definition: control.c:2567
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:3635
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:2053
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:1405
int snd_ctl_get_power_state(snd_ctl_t *ctl, unsigned int *state)
Get actual Power State.
Definition: control.c:1336
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:3323
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:1657
int snd_ctl_rawmidi_prefer_subdevice(snd_ctl_t *ctl, int subdev)
Set preferred RawMidi subdevice number of successive RawMidi open.
Definition: control.c:1267
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:1322
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:2478
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:219
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:2664
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:1837
const char * snd_ctl_name(snd_ctl_t *ctl)
get identifier of CTL handle
Definition: control.c:209
void snd_ctl_event_free(snd_ctl_event_t *obj)
frees a previously allocated snd_ctl_event_t
Definition: control.c:2315
int snd_ctl_elem_read(snd_ctl_t *ctl, snd_ctl_elem_value_t *data)
Get CTL element value.
Definition: control.c:1013
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:1825
struct _snd_hctl snd_hctl_t
Definition: control.h:709
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:867
int snd_card_get_index(const char *name)
Convert a card string to the card index.
Definition: cards.c:140
const char * snd_ctl_card_info_get_name(const snd_ctl_card_info_t *obj)
Get the sound card name from the given info object.
Definition: control.c:2240
Definition: control.h:247
struct _snd_hctl_elem snd_hctl_elem_t
Definition: control.h:706
Definition: control.h:347
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:2530
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:3579
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:2556
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:2075
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:888
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:930
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:3108
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:2764
snd_ctl_type_t snd_ctl_type(snd_ctl_t *ctl)
get type of CTL handle
Definition: control.c:222
int snd_sctl_install(snd_sctl_t *handle)
Install given values to control elements.
Definition: setup.c:83
int snd_ctl_elem_list_alloc_space(snd_ctl_elem_list_t *obj, unsigned int entries)
allocate space for CTL element identifiers list
Definition: control.c:1745
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:3042
const char * snd_ctl_elem_type_name(snd_ctl_elem_type_t type)
get name of a CTL element type
Definition: control.c:1706
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:1890
snd_ctl_event_type_t
Definition: control.h:260
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:3145
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:1641
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:2086
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:2226
Definition: control.h:353
struct _snd_sctl snd_sctl_t
Definition: control.h:375
Definition: control.h:236
int snd_card_get_longname(int card, char **name)
Obtain the card long name.
Definition: cards.c:222
snd_hctl_elem_t * snd_hctl_find_elem(snd_hctl_t *hctl, const snd_ctl_elem_id_t *id)
Search an HCTL element.
Definition: hcontrol.c:551
void snd_ctl_elem_list_clear(snd_ctl_elem_list_t *obj)
Clear given snd_ctl_elem_list_t object.
Definition: control.c:2406
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:3075
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:3394
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:2212
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:3489
int snd_ctl_elem_write(snd_ctl_t *ctl, snd_ctl_elem_value_t *data)
Set CTL element value.
Definition: control.c:1034
Definition: control.h:251
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:3597
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:2609
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:3525
size_t snd_ctl_elem_id_sizeof(void)
get size of snd_ctl_elem_id_t
Definition: control.c:1880
void snd_ctl_elem_info_free(snd_ctl_elem_info_t *obj)
frees a previously allocated snd_ctl_elem_info_t
Definition: control.c:2590
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:3672
Definition: control.h:224
int(* snd_hctl_elem_callback_t)(snd_hctl_elem_t *elem, unsigned int mask)
HCTL element callback function.
Definition: control.h:737
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:1083
unsigned char pad
Definition: control.h:55
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:1903
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:2697