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control.h
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1 
11 /*
12  * This library is free software; you can redistribute it and/or modify
13  * it under the terms of the GNU Lesser General Public License as
14  * published by the Free Software Foundation; either version 2.1 of
15  * the License, or (at your option) any later version.
16  *
17  * This program is distributed in the hope that it will be useful,
18  * but WITHOUT ANY WARRANTY; without even the implied warranty of
19  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20  * GNU Lesser General Public License for more details.
21  *
22  * You should have received a copy of the GNU Lesser General Public
23  * License along with this library; if not, write to the Free Software
24  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 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 
60 typedef struct _snd_ctl_elem_list snd_ctl_elem_list_t;
61 
63 typedef struct _snd_ctl_elem_info snd_ctl_elem_info_t;
64 
66 typedef struct _snd_ctl_elem_value snd_ctl_elem_value_t;
67 
69 typedef struct _snd_ctl_event snd_ctl_event_t;
70 
72 typedef enum _snd_ctl_elem_type {
87  SND_CTL_ELEM_TYPE_LAST = SND_CTL_ELEM_TYPE_INTEGER64
89 
91 typedef enum _snd_ctl_elem_iface {
106  SND_CTL_ELEM_IFACE_LAST = SND_CTL_ELEM_IFACE_SEQUENCER
108 
110 typedef enum _snd_ctl_event_type {
113  SND_CTL_EVENT_LAST = SND_CTL_EVENT_ELEM
115 
118 #define SND_CTL_EVENT_MASK_REMOVE (~0U)
119 
120 #define SND_CTL_EVENT_MASK_VALUE (1<<0)
121 
122 #define SND_CTL_EVENT_MASK_INFO (1<<1)
123 
124 #define SND_CTL_EVENT_MASK_ADD (1<<2)
125 
126 #define SND_CTL_EVENT_MASK_TLV (1<<3)
127 
129 #define SND_CTL_NAME_NONE ""
130 
131 #define SND_CTL_NAME_PLAYBACK "Playback "
132 
133 #define SND_CTL_NAME_CAPTURE "Capture "
134 
136 #define SND_CTL_NAME_IEC958_NONE ""
137 
138 #define SND_CTL_NAME_IEC958_SWITCH "Switch"
139 
140 #define SND_CTL_NAME_IEC958_VOLUME "Volume"
141 
142 #define SND_CTL_NAME_IEC958_DEFAULT "Default"
143 
144 #define SND_CTL_NAME_IEC958_MASK "Mask"
145 
146 #define SND_CTL_NAME_IEC958_CON_MASK "Con Mask"
147 
148 #define SND_CTL_NAME_IEC958_PRO_MASK "Pro Mask"
149 
150 #define SND_CTL_NAME_IEC958_PCM_STREAM "PCM Stream"
151 
152 #define SND_CTL_NAME_IEC958(expl,direction,what) "IEC958 " expl SND_CTL_NAME_##direction SND_CTL_NAME_IEC958_##what
153 
155 #define SND_CTL_POWER_MASK 0xff00
156 
157 #define SND_CTL_POWER_D0 0x0000
158 
159 #define SND_CTL_POWER_D1 0x0100
160 
161 #define SND_CTL_POWER_D2 0x0200
162 
163 #define SND_CTL_POWER_D3 0x0300
164 
165 #define SND_CTL_POWER_D3hot (SND_CTL_POWER_D3|0x0000)
166 
167 #define SND_CTL_POWER_D3cold (SND_CTL_POWER_D3|0x0001)
168 
170 #define SND_CTL_TLVT_CONTAINER 0x0000
171 
172 #define SND_CTL_TLVT_DB_SCALE 0x0001
173 
174 #define SND_CTL_TLVT_DB_LINEAR 0x0002
175 
176 #define SND_CTL_TLVT_DB_RANGE 0x0003
177 
178 #define SND_CTL_TLVT_DB_MINMAX 0x0004
179 
180 #define SND_CTL_TLVT_DB_MINMAX_MUTE 0x0005
181 
183 #define SND_CTL_TLV_DB_GAIN_MUTE -9999999
184 
186 #define SND_CTL_TLVT_CHMAP_FIXED 0x00101
187 
188 #define SND_CTL_TLVT_CHMAP_VAR 0x00102
189 
190 #define SND_CTL_TLVT_CHMAP_PAIRED 0x00103
191 
193 typedef enum _snd_ctl_type {
203 
205 #define SND_CTL_NONBLOCK 0x0001
206 
208 #define SND_CTL_ASYNC 0x0002
209 
211 #define SND_CTL_READONLY 0x0004
212 
214 typedef struct _snd_ctl snd_ctl_t;
215 
217 #define SND_SCTL_NOFREE 0x0001
218 
220 typedef struct _snd_sctl snd_sctl_t;
221 
222 int snd_card_load(int card);
223 int snd_card_next(int *card);
224 int snd_card_get_index(const char *name);
225 int snd_card_get_name(int card, char **name);
226 int snd_card_get_longname(int card, char **name);
227 
228 int snd_device_name_hint(int card, const char *iface, void ***hints);
229 int snd_device_name_free_hint(void **hints);
230 char *snd_device_name_get_hint(const void *hint, const char *id);
231 
232 int snd_ctl_open(snd_ctl_t **ctl, const char *name, int mode);
233 int snd_ctl_open_lconf(snd_ctl_t **ctl, const char *name, int mode, snd_config_t *lconf);
234 int snd_ctl_open_fallback(snd_ctl_t **ctl, snd_config_t *root, const char *name, const char *orig_name, int mode);
235 int snd_ctl_close(snd_ctl_t *ctl);
236 int snd_ctl_nonblock(snd_ctl_t *ctl, int nonblock);
237 static __inline__ int snd_ctl_abort(snd_ctl_t *ctl) { return snd_ctl_nonblock(ctl, 2); }
239  snd_async_callback_t callback, void *private_data);
242 int snd_ctl_poll_descriptors(snd_ctl_t *ctl, struct pollfd *pfds, unsigned int space);
243 int snd_ctl_poll_descriptors_revents(snd_ctl_t *ctl, struct pollfd *pfds, unsigned int nfds, unsigned short *revents);
244 int snd_ctl_subscribe_events(snd_ctl_t *ctl, int subscribe);
253  unsigned int *tlv, unsigned int tlv_size);
255  const unsigned int *tlv);
257  const unsigned int *tlv);
258 #ifdef __ALSA_HWDEP_H
259 int snd_ctl_hwdep_next_device(snd_ctl_t *ctl, int * device);
261 #endif
262 #ifdef __ALSA_PCM_H
263 int snd_ctl_pcm_next_device(snd_ctl_t *ctl, int *device);
264 int snd_ctl_pcm_info(snd_ctl_t *ctl, snd_pcm_info_t * info);
265 int snd_ctl_pcm_prefer_subdevice(snd_ctl_t *ctl, int subdev);
266 #endif
267 #ifdef __ALSA_RAWMIDI_H
268 int snd_ctl_rawmidi_next_device(snd_ctl_t *ctl, int * device);
270 int snd_ctl_rawmidi_prefer_subdevice(snd_ctl_t *ctl, int subdev);
271 #endif
272 int snd_ctl_set_power_state(snd_ctl_t *ctl, unsigned int state);
273 int snd_ctl_get_power_state(snd_ctl_t *ctl, unsigned int *state);
274 
275 int snd_ctl_read(snd_ctl_t *ctl, snd_ctl_event_t *event);
276 int snd_ctl_wait(snd_ctl_t *ctl, int timeout);
277 const char *snd_ctl_name(snd_ctl_t *ctl);
279 
283 
284 unsigned int snd_ctl_event_elem_get_mask(const snd_ctl_event_t *obj);
285 unsigned int snd_ctl_event_elem_get_numid(const snd_ctl_event_t *obj);
288 unsigned int snd_ctl_event_elem_get_device(const snd_ctl_event_t *obj);
289 unsigned int snd_ctl_event_elem_get_subdevice(const snd_ctl_event_t *obj);
290 const char *snd_ctl_event_elem_get_name(const snd_ctl_event_t *obj);
291 unsigned int snd_ctl_event_elem_get_index(const snd_ctl_event_t *obj);
292 
293 int snd_ctl_elem_list_alloc_space(snd_ctl_elem_list_t *obj, unsigned int entries);
295 
297 int snd_ctl_ascii_elem_id_parse(snd_ctl_elem_id_t *dst, const char *str);
300  snd_ctl_elem_info_t *info,
301  const char *value);
302 
303 size_t snd_ctl_elem_id_sizeof(void);
308 #define snd_ctl_elem_id_alloca(ptr) __snd_alloca(ptr, snd_ctl_elem_id)
313 unsigned int snd_ctl_elem_id_get_numid(const snd_ctl_elem_id_t *obj);
315 unsigned int snd_ctl_elem_id_get_device(const snd_ctl_elem_id_t *obj);
316 unsigned int snd_ctl_elem_id_get_subdevice(const snd_ctl_elem_id_t *obj);
317 const char *snd_ctl_elem_id_get_name(const snd_ctl_elem_id_t *obj);
318 unsigned int snd_ctl_elem_id_get_index(const snd_ctl_elem_id_t *obj);
319 void snd_ctl_elem_id_set_numid(snd_ctl_elem_id_t *obj, unsigned int val);
321 void snd_ctl_elem_id_set_device(snd_ctl_elem_id_t *obj, unsigned int val);
322 void snd_ctl_elem_id_set_subdevice(snd_ctl_elem_id_t *obj, unsigned int val);
323 void snd_ctl_elem_id_set_name(snd_ctl_elem_id_t *obj, const char *val);
324 void snd_ctl_elem_id_set_index(snd_ctl_elem_id_t *obj, unsigned int val);
325 
326 size_t snd_ctl_card_info_sizeof(void);
331 #define snd_ctl_card_info_alloca(ptr) __snd_alloca(ptr, snd_ctl_card_info)
337 const char *snd_ctl_card_info_get_id(const snd_ctl_card_info_t *obj);
338 const char *snd_ctl_card_info_get_driver(const snd_ctl_card_info_t *obj);
339 const char *snd_ctl_card_info_get_name(const snd_ctl_card_info_t *obj);
343 
344 size_t snd_ctl_event_sizeof(void);
349 #define snd_ctl_event_alloca(ptr) __snd_alloca(ptr, snd_ctl_event)
353 void snd_ctl_event_copy(snd_ctl_event_t *dst, const snd_ctl_event_t *src);
355 
356 size_t snd_ctl_elem_list_sizeof(void);
361 #define snd_ctl_elem_list_alloca(ptr) __snd_alloca(ptr, snd_ctl_elem_list)
366 void snd_ctl_elem_list_set_offset(snd_ctl_elem_list_t *obj, unsigned int val);
367 unsigned int snd_ctl_elem_list_get_used(const snd_ctl_elem_list_t *obj);
368 unsigned int snd_ctl_elem_list_get_count(const snd_ctl_elem_list_t *obj);
369 void snd_ctl_elem_list_get_id(const snd_ctl_elem_list_t *obj, unsigned int idx, snd_ctl_elem_id_t *ptr);
370 unsigned int snd_ctl_elem_list_get_numid(const snd_ctl_elem_list_t *obj, unsigned int idx);
372 unsigned int snd_ctl_elem_list_get_device(const snd_ctl_elem_list_t *obj, unsigned int idx);
373 unsigned int snd_ctl_elem_list_get_subdevice(const snd_ctl_elem_list_t *obj, unsigned int idx);
374 const char *snd_ctl_elem_list_get_name(const snd_ctl_elem_list_t *obj, unsigned int idx);
375 unsigned int snd_ctl_elem_list_get_index(const snd_ctl_elem_list_t *obj, unsigned int idx);
376 
377 size_t snd_ctl_elem_info_sizeof(void);
382 #define snd_ctl_elem_info_alloca(ptr) __snd_alloca(ptr, snd_ctl_elem_info)
399 unsigned int snd_ctl_elem_info_get_count(const snd_ctl_elem_info_t *obj);
406 unsigned int snd_ctl_elem_info_get_items(const snd_ctl_elem_info_t *obj);
407 void snd_ctl_elem_info_set_item(snd_ctl_elem_info_t *obj, unsigned int val);
410 int snd_ctl_elem_info_get_dimension(const snd_ctl_elem_info_t *obj, unsigned int idx);
412 unsigned int snd_ctl_elem_info_get_numid(const snd_ctl_elem_info_t *obj);
414 unsigned int snd_ctl_elem_info_get_device(const snd_ctl_elem_info_t *obj);
416 const char *snd_ctl_elem_info_get_name(const snd_ctl_elem_info_t *obj);
417 unsigned int snd_ctl_elem_info_get_index(const snd_ctl_elem_info_t *obj);
419 void snd_ctl_elem_info_set_numid(snd_ctl_elem_info_t *obj, unsigned int val);
421 void snd_ctl_elem_info_set_device(snd_ctl_elem_info_t *obj, unsigned int val);
422 void snd_ctl_elem_info_set_subdevice(snd_ctl_elem_info_t *obj, unsigned int val);
423 void snd_ctl_elem_info_set_name(snd_ctl_elem_info_t *obj, const char *val);
424 void snd_ctl_elem_info_set_index(snd_ctl_elem_info_t *obj, unsigned int val);
425 
426 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);
427 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);
428 int snd_ctl_elem_add_boolean(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id, unsigned int count);
429 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[]);
432 
433 size_t snd_ctl_elem_value_sizeof(void);
438 #define snd_ctl_elem_value_alloca(ptr) __snd_alloca(ptr, snd_ctl_elem_value)
445 unsigned int snd_ctl_elem_value_get_numid(const snd_ctl_elem_value_t *obj);
447 unsigned int snd_ctl_elem_value_get_device(const snd_ctl_elem_value_t *obj);
449 const char *snd_ctl_elem_value_get_name(const snd_ctl_elem_value_t *obj);
450 unsigned int snd_ctl_elem_value_get_index(const snd_ctl_elem_value_t *obj);
452 void snd_ctl_elem_value_set_numid(snd_ctl_elem_value_t *obj, unsigned int val);
454 void snd_ctl_elem_value_set_device(snd_ctl_elem_value_t *obj, unsigned int val);
455 void snd_ctl_elem_value_set_subdevice(snd_ctl_elem_value_t *obj, unsigned int val);
456 void snd_ctl_elem_value_set_name(snd_ctl_elem_value_t *obj, const char *val);
457 void snd_ctl_elem_value_set_index(snd_ctl_elem_value_t *obj, unsigned int val);
458 int snd_ctl_elem_value_get_boolean(const snd_ctl_elem_value_t *obj, unsigned int idx);
459 long snd_ctl_elem_value_get_integer(const snd_ctl_elem_value_t *obj, unsigned int idx);
460 long long snd_ctl_elem_value_get_integer64(const snd_ctl_elem_value_t *obj, unsigned int idx);
461 unsigned int snd_ctl_elem_value_get_enumerated(const snd_ctl_elem_value_t *obj, unsigned int idx);
462 unsigned char snd_ctl_elem_value_get_byte(const snd_ctl_elem_value_t *obj, unsigned int idx);
463 void snd_ctl_elem_value_set_boolean(snd_ctl_elem_value_t *obj, unsigned int idx, long val);
464 void snd_ctl_elem_value_set_integer(snd_ctl_elem_value_t *obj, unsigned int idx, long val);
465 void snd_ctl_elem_value_set_integer64(snd_ctl_elem_value_t *obj, unsigned int idx, long long val);
466 void snd_ctl_elem_value_set_enumerated(snd_ctl_elem_value_t *obj, unsigned int idx, unsigned int val);
467 void snd_ctl_elem_value_set_byte(snd_ctl_elem_value_t *obj, unsigned int idx, unsigned char val);
468 void snd_ctl_elem_set_bytes(snd_ctl_elem_value_t *obj, void *data, size_t size);
469 const void * snd_ctl_elem_value_get_bytes(const snd_ctl_elem_value_t *obj);
472 
473 int snd_tlv_parse_dB_info(unsigned int *tlv, unsigned int tlv_size,
474  unsigned int **db_tlvp);
475 int snd_tlv_get_dB_range(unsigned int *tlv, long rangemin, long rangemax,
476  long *min, long *max);
477 int snd_tlv_convert_to_dB(unsigned int *tlv, long rangemin, long rangemax,
478  long volume, long *db_gain);
479 int snd_tlv_convert_from_dB(unsigned int *tlv, long rangemin, long rangemax,
480  long db_gain, long *value, int xdir);
482  long *min, long *max);
484  long volume, long *db_gain);
486  long db_gain, long *value, int xdir);
487 
497 typedef struct _snd_hctl_elem snd_hctl_elem_t;
498 
500 typedef struct _snd_hctl snd_hctl_t;
501 
508 typedef int (*snd_hctl_compare_t)(const snd_hctl_elem_t *e1,
509  const snd_hctl_elem_t *e2);
511  const snd_hctl_elem_t *c2);
519 typedef int (*snd_hctl_callback_t)(snd_hctl_t *hctl,
520  unsigned int mask,
521  snd_hctl_elem_t *elem);
529  unsigned int mask);
530 
531 int snd_hctl_open(snd_hctl_t **hctl, const char *name, int mode);
532 int snd_hctl_open_ctl(snd_hctl_t **hctlp, snd_ctl_t *ctl);
533 int snd_hctl_close(snd_hctl_t *hctl);
534 int snd_hctl_nonblock(snd_hctl_t *hctl, int nonblock);
535 static __inline__ int snd_hctl_abort(snd_hctl_t *hctl) { return snd_hctl_nonblock(hctl, 2); }
537 int snd_hctl_poll_descriptors(snd_hctl_t *hctl, struct pollfd *pfds, unsigned int space);
538 int snd_hctl_poll_descriptors_revents(snd_hctl_t *ctl, struct pollfd *pfds, unsigned int nfds, unsigned short *revents);
539 unsigned int snd_hctl_get_count(snd_hctl_t *hctl);
545 void snd_hctl_set_callback_private(snd_hctl_t *hctl, void *data);
547 int snd_hctl_load(snd_hctl_t *hctl);
548 int snd_hctl_free(snd_hctl_t *hctl);
550 const char *snd_hctl_name(snd_hctl_t *hctl);
551 int snd_hctl_wait(snd_hctl_t *hctl, int timeout);
553 
559 int snd_hctl_elem_tlv_read(snd_hctl_elem_t *elem, unsigned int *tlv, unsigned int tlv_size);
560 int snd_hctl_elem_tlv_write(snd_hctl_elem_t *elem, const unsigned int *tlv);
561 int snd_hctl_elem_tlv_command(snd_hctl_elem_t *elem, const unsigned int *tlv);
562 
564 
566 unsigned int snd_hctl_elem_get_numid(const snd_hctl_elem_t *obj);
568 unsigned int snd_hctl_elem_get_device(const snd_hctl_elem_t *obj);
569 unsigned int snd_hctl_elem_get_subdevice(const snd_hctl_elem_t *obj);
570 const char *snd_hctl_elem_get_name(const snd_hctl_elem_t *obj);
571 unsigned int snd_hctl_elem_get_index(const snd_hctl_elem_t *obj);
575 
587 int snd_sctl_build(snd_sctl_t **ctl, snd_ctl_t *handle, snd_config_t *config,
588  snd_config_t *private_data, int mode);
589 int snd_sctl_free(snd_sctl_t *handle);
590 int snd_sctl_install(snd_sctl_t *handle);
591 int snd_sctl_remove(snd_sctl_t *handle);
592 
595 #ifdef __cplusplus
596 }
597 #endif
598 
599 #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:821
int snd_ctl_hwdep_next_device(snd_ctl_t *ctl, int *device)
Get next hardware dependent device number.
Definition: control.c:608
unsigned int snd_ctl_elem_value_get_enumerated(const snd_ctl_elem_value_t *obj, unsigned int idx)
Get value for an entry of a SND_CTL_ELEM_TYPE_ENUMERATED CTL element id/value.
Definition: control.c:2540
Definition: control.h:201
const char * snd_ctl_elem_iface_name(snd_ctl_elem_iface_t iface)
get name of a CTL element related interface
Definition: control.c:1067
size_t snd_ctl_event_sizeof(void)
get size of snd_ctl_event_t
Definition: control.c:1534
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:2017
size_t snd_ctl_elem_list_sizeof(void)
get size of snd_ctl_elem_list_t
Definition: control.c:1597
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:72
struct _snd_ctl_card_info snd_ctl_card_info_t
Definition: control.h:54
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:487
int snd_ctl_elem_value_compare(snd_ctl_elem_value_t *left, const snd_ctl_elem_value_t *right)
compare one snd_ctl_elem_value_t to another
Definition: control.c:2335
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:2053
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:2139
int snd_ctl_rawmidi_info(snd_ctl_t *ctl, snd_rawmidi_info_t *info)
Get info about a RawMidi device.
Definition: control.c:680
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:464
Definition: control.h:105
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:2205
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:1447
int snd_ctl_pcm_next_device(snd_ctl_t *ctl, int *device)
Get next PCM device number.
Definition: control.c:632
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:2113
unsigned int snd_ctl_elem_value_get_index(const snd_ctl_elem_value_t *obj)
Get index part of CTL element identifier of a CTL element id/value.
Definition: control.c:2412
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:1925
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:1837
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:2161
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:1826
unsigned int snd_ctl_elem_list_get_count(const snd_ctl_elem_list_t *obj)
Get total count of elements present in CTL device (information present in every filled CTL element id...
Definition: control.c:1672
void(* snd_async_callback_t)(snd_async_handler_t *handler)
Async notification callback.
Definition: global.h:121
Definition: control.h:76
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:838
unsigned int snd_ctl_elem_value_get_subdevice(const snd_ctl_elem_value_t *obj)
Get subdevice part of CTL element identifier of a CTL element id/value.
Definition: control.c:2390
int(* snd_hctl_elem_callback_t)(snd_hctl_elem_t *elem, unsigned int mask)
HCTL element callback function.
Definition: control.h:528
int snd_card_load(int card)
Try to load the driver for a card.
Definition: cards.c:83
Definition: control.h:199
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:2076
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:1142
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:1340
pid_t snd_ctl_elem_info_get_owner(const snd_ctl_elem_info_t *obj)
Get owner of a locked element.
Definition: control.c:1959
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 index part of CTL element identifier of a CTL element id/value.
Definition: control.c:2489
Definition: control.h:112
int snd_hctl_compare_fast(const snd_hctl_elem_t *c1, const snd_hctl_elem_t *c2)
A &quot;don&#39;t care&quot; 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:46
void snd_ctl_elem_value_free(snd_ctl_elem_value_t *obj)
frees a previously allocated snd_ctl_elem_value_t
Definition: control.c:2304
int snd_ctl_elem_info_is_locked(const snd_ctl_elem_info_t *obj)
Get info whether an element is locked.
Definition: control.c:1881
void snd_ctl_elem_value_set_boolean(snd_ctl_elem_value_t *obj, unsigned int idx, long val)
Set value for an entry of a SND_CTL_ELEM_TYPE_BOOLEAN CTL element id/value.
Definition: control.c:2566
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:1576
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:1307
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:1993
void snd_ctl_elem_value_set_iec958(snd_ctl_elem_value_t *obj, const snd_aes_iec958_t *ptr)
Set value for a SND_CTL_ELEM_TYPE_IEC958 CTL element id/value.
Definition: control.c:2665
int snd_ctl_event_malloc(snd_ctl_event_t **ptr)
allocate an invalid snd_ctl_event_t using standard malloc
Definition: control.c:1544
const void * snd_ctl_elem_value_get_bytes(const snd_ctl_elem_value_t *obj)
Get value for a SND_CTL_ELEM_TYPE_BYTES CTL element id/value.
Definition: control.c:2643
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:178
long snd_ctl_elem_value_get_integer(const snd_ctl_elem_value_t *obj, unsigned int idx)
Get value for an entry of a SND_CTL_ELEM_TYPE_INTEGER CTL element id/value.
Definition: control.c:2514
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:943
struct _snd_ctl snd_ctl_t
Definition: control.h:214
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:84
int snd_ctl_elem_tlv_write(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id, const unsigned int *tlv)
Set CTL element TLV value.
Definition: control.c:555
void snd_ctl_elem_value_set_numid(snd_ctl_elem_value_t *obj, unsigned int val)
Set element numeric identifier of a CTL element id/value.
Definition: control.c:2434
void snd_ctl_elem_id_clear(snd_ctl_elem_id_t *obj)
clear given snd_ctl_elem_id_t object
Definition: control.c:1253
snd_ctl_elem_iface_t snd_ctl_elem_value_get_interface(const snd_ctl_elem_value_t *obj)
Get interface part of CTL element identifier of a CTL element id/value.
Definition: control.c:2368
unsigned int snd_ctl_elem_value_get_device(const snd_ctl_elem_value_t *obj)
Get device part of CTL element identifier of a CTL element id/value.
Definition: control.c:2379
void snd_ctl_elem_info_clear(snd_ctl_elem_info_t *obj)
clear given snd_ctl_elem_info_t object
Definition: control.c:1805
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:1587
struct _snd_ctl_elem_value snd_ctl_elem_value_t
Definition: control.h:66
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:1981
int(* snd_hctl_callback_t)(snd_hctl_t *hctl, unsigned int mask, snd_hctl_elem_t *elem)
HCTL callback function.
Definition: control.h:519
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:1190
int snd_ctl_elem_unlock(snd_ctl_t *ctl, snd_ctl_elem_id_t *id)
Unlock CTL element.
Definition: control.c:596
int snd_ctl_nonblock(snd_ctl_t *ctl, int nonblock)
set nonblock mode
Definition: control.c:109
snd_ctl_elem_iface_t
Definition: control.h:91
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:2150
Definition: control.h:103
snd_ctl_type_t
Definition: control.h:193
int snd_device_name_hint(int card, const char *iface, void ***hints)
Get a set of device name hints.
Definition: namehint.c:552
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 BOOLEAN CTL element.
Definition: control.c:347
int snd_ctl_card_info(snd_ctl_t *ctl, snd_ctl_card_info_t *info)
Get card related information.
Definition: control.c:232
unsigned int snd_ctl_elem_list_get_device(const snd_ctl_elem_list_t *obj, unsigned int idx)
Get device part of CTL element identifier for an entry of a CTL element identifiers list...
Definition: control.c:1723
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:1154
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:1513
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:1697
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:1296
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:1263
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:2065
int snd_ctl_elem_tlv_command(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id, const unsigned int *tlv)
Process CTL element TLV command.
Definition: control.c:571
int snd_ctl_open(snd_ctl_t **ctl, const char *name, int mode)
Opens a CTL.
Definition: control.c:969
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:2271
int snd_ctl_elem_lock(snd_ctl_t *ctl, snd_ctl_elem_id_t *id)
Lock CTL element.
Definition: control.c:584
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:1661
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:1130
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:1285
Definition: control.h:80
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:1118
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:443
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:854
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:976
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:2005
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:1395
void snd_ctl_elem_value_get_id(const snd_ctl_elem_value_t *obj, snd_ctl_elem_id_t *ptr)
Get CTL element identifier of a CTL element id/value.
Definition: control.c:2346
int snd_ctl_pcm_prefer_subdevice(snd_ctl_t *ctl, int subdev)
Set preferred PCM subdevice number of successive PCM open.
Definition: control.c:656
void snd_ctl_card_info_free(snd_ctl_card_info_t *obj)
frees a previously allocated snd_ctl_card_info_t
Definition: control.c:1428
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:1749
int snd_ctl_elem_info_is_owner(const snd_ctl_elem_info_t *obj)
Get info if I own an element.
Definition: control.c:1892
struct _snd_ctl_elem_list snd_ctl_elem_list_t
Definition: control.h:60
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:244
void snd_ctl_elem_value_set_byte(snd_ctl_elem_value_t *obj, unsigned int idx, unsigned char val)
Set value for an entry of a SND_CTL_ELEM_TYPE_BYTES CTL element id/value.
Definition: control.c:2618
Definition: control.h:99
void snd_ctl_elem_value_set_name(snd_ctl_elem_value_t *obj, const char *val)
Set name part of CTL element identifier of a CTL element id/value.
Definition: control.c:2478
int snd_ctl_elem_info_get_dimensions(const snd_ctl_elem_info_t *obj)
Get count of dimensions for given element.
Definition: control.c:2091
const char * snd_ctl_event_type_name(snd_ctl_event_type_t type)
get name of a CTL event type
Definition: control.c:1078
void snd_ctl_elem_value_clear(snd_ctl_elem_value_t *obj)
clear given snd_ctl_elem_value_t object
Definition: control.c:2313
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:1009
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:1936
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:1373
void snd_ctl_elem_value_set_subdevice(snd_ctl_elem_value_t *obj, unsigned int val)
Set subdevice part of CTL element identifier of a CTL element id/value.
Definition: control.c:2467
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:508
int snd_ctl_read(snd_ctl_t *ctl, snd_ctl_event_t *event)
Read an event.
Definition: control.c:732
int snd_device_name_free_hint(void **hints)
Free a list of device name hints.
Definition: namehint.c:655
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:886
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:2128
char * snd_ctl_ascii_elem_id_get(snd_ctl_elem_id_t *id)
return ASCII CTL element identifier name
Definition: ctlparse.c:114
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:1437
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:1384
int snd_ctl_poll_descriptors_count(snd_ctl_t *ctl)
get count of poll descriptors for CTL handle
Definition: control.c:161
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:1639
int snd_ctl_elem_read(snd_ctl_t *ctl, snd_ctl_elem_value_t *value)
Get CTL element value.
Definition: control.c:468
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:2041
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:965
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:2238
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:1202
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:2216
int snd_ctl_pcm_info(snd_ctl_t *ctl, snd_pcm_info_t *info)
Get info about a PCM device.
Definition: control.c:644
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:1458
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:1650
void snd_ctl_event_clear(snd_ctl_event_t *obj)
clear given snd_ctl_event_t object
Definition: control.c:1566
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:954
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:806
int snd_ctl_elem_info(snd_ctl_t *ctl, snd_ctl_elem_info_t *info)
Get CTL element information.
Definition: control.c:257
snd_ctl_t * snd_async_handler_get_ctl(snd_async_handler_t *handler)
Return CTL handle related to an async handler.
Definition: control.c:817
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:456
size_t snd_ctl_elem_value_sizeof(void)
get size of snd_ctl_elem_value_t
Definition: control.c:2281
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:744
Definition: control.h:95
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:2029
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:932
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:2172
int snd_ctl_hwdep_info(snd_ctl_t *ctl, snd_hwdep_info_t *info)
Get info about a hardware dependent device.
Definition: control.c:620
int snd_ctl_elem_value_get_boolean(const snd_ctl_elem_value_t *obj, unsigned int idx)
Get value for an entry of a SND_CTL_ELEM_TYPE_BOOLEAN CTL element id/value.
Definition: control.c:2501
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:1415
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:921
int snd_ctl_close(snd_ctl_t *ctl)
close CTL handle
Definition: control.c:89
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:998
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:289
Definition: control.h:82
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:219
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:201
size_t snd_ctl_card_info_sizeof(void)
get size of snd_ctl_card_info_t
Definition: control.c:1405
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:1859
int snd_ctl_elem_add_iec958(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id)
Create and add an user IEC958 CTL element.
Definition: control.c:438
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:1106
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:2183
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:1524
void snd_ctl_elem_value_set_integer(snd_ctl_elem_value_t *obj, unsigned int idx, long val)
Set value for an entry of a SND_CTL_ELEM_TYPE_INTEGER CTL element id/value.
Definition: control.c:2579
void snd_ctl_elem_value_set_interface(snd_ctl_elem_value_t *obj, snd_ctl_elem_iface_t val)
Set interface part of CTL element identifier of a CTL element id/value.
Definition: control.c:2445
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:1274
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:1318
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:200
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:910
const char * snd_hctl_name(snd_hctl_t *hctl)
get identifier of HCTL handle
Definition: hcontrol.c:130
Definition: control.h:195
void snd_ctl_elem_list_free(snd_ctl_elem_list_t *obj)
frees a previously allocated snd_ctl_elem_list_t
Definition: control.c:1620
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:2249
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:1502
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:1783
int snd_ctl_rawmidi_next_device(snd_ctl_t *ctl, int *device)
Get next RawMidi device number.
Definition: control.c:668
struct _snd_ctl_elem_info snd_ctl_elem_info_t
Definition: control.h:63
void snd_ctl_elem_value_copy(snd_ctl_elem_value_t *dst, const snd_ctl_elem_value_t *src)
copy one snd_ctl_elem_value_t to another
Definition: control.c:2323
void snd_ctl_elem_value_set_id(snd_ctl_elem_value_t *obj, const snd_ctl_elem_id_t *ptr)
Set CTL element identifier of a CTL element id/value.
Definition: control.c:2423
struct _snd_async_handler snd_async_handler_t
Internal structure for an async notification client handler.
Definition: global.h:114
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:645
int snd_ctl_elem_list_malloc(snd_ctl_elem_list_t **ptr)
allocate an invalid snd_ctl_elem_list_t using standard malloc
Definition: control.c:1607
Definition: control.h:78
Definition: control.h:93
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:1914
int snd_ctl_elem_value_malloc(snd_ctl_elem_value_t **ptr)
allocate an invalid snd_ctl_elem_value_t using standard malloc
Definition: control.c:2291
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:1710
snd_hctl_elem_t * snd_hctl_first_elem(snd_hctl_t *hctl)
get first element for an HCTL
Definition: hcontrol.c:498
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:1848
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 element numeric identifier of a CTL element id/value.
Definition: control.c:2357
size_t snd_ctl_elem_info_sizeof(void)
get size of snd_ctl_elem_info_t
Definition: control.c:1773
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:987
void snd_ctl_elem_set_bytes(snd_ctl_elem_value_t *obj, void *data, size_t size)
Set CTL element SND_CTL_ELEM_TYPE_BYTES value.
Definition: control.c:2631
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:1329
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:787
int snd_ctl_get_power_state(snd_ctl_t *ctl, unsigned int *state)
Get actual Power State.
Definition: control.c:718
int snd_hctl_handle_events(snd_hctl_t *hctl)
Handle pending HCTL events invoking callbacks.
Definition: hcontrol.c:780
const char * snd_ctl_elem_value_get_name(const snd_ctl_elem_value_t *obj)
Get name part of CTL element identifier of a CTL element id/value.
Definition: control.c:2401
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:1007
int snd_ctl_rawmidi_prefer_subdevice(snd_ctl_t *ctl, int subdev)
Set preferred RawMidi subdevice number of successive RawMidi open.
Definition: control.c:692
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:704
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:870
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:1684
snd_hctl_t * snd_hctl_elem_get_hctl(snd_hctl_elem_t *elem)
Get HCTL handle for an HCTL element.
Definition: hcontrol.c:899
struct _snd_ctl_event snd_ctl_event_t
Definition: control.h:69
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:604
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:1870
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:1178
const char * snd_ctl_name(snd_ctl_t *ctl)
get identifier of CTL handle
Definition: control.c:62
void snd_ctl_event_free(snd_ctl_event_t *obj)
frees a previously allocated snd_ctl_event_t
Definition: control.c:1557
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:1166
struct _snd_hctl snd_hctl_t
Definition: control.h:500
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 INTEGER CTL element.
Definition: control.c:273
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:1491
struct _snd_config snd_config_t
Internal structure for a configuration node object.
Definition: conf.h:69
Definition: control.h:97
struct _snd_hctl_elem snd_hctl_elem_t
Definition: control.h:497
Definition: control.h:197
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:1736
void snd_ctl_elem_value_set_integer64(snd_ctl_elem_value_t *obj, unsigned int idx, long long val)
Set value for an entry of a SND_CTL_ELEM_TYPE_INTEGER64 CTL element id/value.
Definition: control.c:2592
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:1762
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:1351
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 INTEGER64 CTL element.
Definition: control.c:312
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 type enumerated.
Definition: control.c:394
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:2260
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:1970
snd_ctl_type_t snd_ctl_type(snd_ctl_t *ctl)
get type of CTL handle
Definition: control.c:75
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:1090
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:2194
const char * snd_ctl_elem_type_name(snd_ctl_elem_type_t type)
get name of a CTL element type
Definition: control.c:1056
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:1231
snd_ctl_event_type_t
Definition: control.h:110
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:991
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:1362
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:1480
struct _snd_sctl snd_sctl_t
Definition: control.h:220
Definition: control.h:86
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:1629
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:309
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:2227
void snd_ctl_elem_value_set_device(snd_ctl_elem_value_t *obj, unsigned int val)
Set device part of CTL element identifier of a CTL element id/value.
Definition: control.c:2456
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:1469
long long snd_ctl_elem_value_get_integer64(const snd_ctl_elem_value_t *obj, unsigned int idx)
Get value for an entry of a SND_CTL_ELEM_TYPE_INTEGER64 CTL element id/value.
Definition: control.c:2527
Definition: control.h:101
int snd_ctl_ascii_elem_id_parse(snd_ctl_elem_id_t *dst, const char *str)
parse ASCII string as CTL element identifier
Definition: ctlparse.c:264
void snd_ctl_elem_value_set_enumerated(snd_ctl_elem_value_t *obj, unsigned int idx, unsigned int val)
Set value for an entry of a SND_CTL_ELEM_TYPE_ENUMERATED CTL element id/value.
Definition: control.c:2605
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:1815
unsigned char snd_ctl_elem_value_get_byte(const snd_ctl_elem_value_t *obj, unsigned int idx)
Get value for an entry of a SND_CTL_ELEM_TYPE_BYTES CTL element id/value.
Definition: control.c:2553
size_t snd_ctl_elem_id_sizeof(void)
get size of snd_ctl_elem_id_t
Definition: control.c:1221
void snd_ctl_elem_info_free(snd_ctl_elem_info_t *obj)
frees a previously allocated snd_ctl_elem_info_t
Definition: control.c:1796
char * snd_device_name_get_hint(const void *hint, const char *id)
Extract a value from a hint.
Definition: namehint.c:683
void snd_ctl_elem_value_get_iec958(const snd_ctl_elem_value_t *obj, snd_aes_iec958_t *ptr)
Get value for a SND_CTL_ELEM_TYPE_IEC958 CTL element id/value.
Definition: control.c:2654
Definition: control.h:74
int snd_ctl_elem_tlv_read(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id, unsigned int *tlv, unsigned int tlv_size)
Get CTL element TLV value.
Definition: control.c:526
unsigned char pad
Definition: control.h:49
int snd_ctl_elem_write(snd_ctl_t *ctl, snd_ctl_elem_value_t *value)
Set CTL element value.
Definition: control.c:482
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:1244
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:1903

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