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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];
51 } snd_aes_iec958_t;
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 {
74 SND_CTL_ELEM_TYPE_NONE = 0,
76 SND_CTL_ELEM_TYPE_BOOLEAN,
78 SND_CTL_ELEM_TYPE_INTEGER,
80 SND_CTL_ELEM_TYPE_ENUMERATED,
82 SND_CTL_ELEM_TYPE_BYTES,
84 SND_CTL_ELEM_TYPE_IEC958,
86 SND_CTL_ELEM_TYPE_INTEGER64,
87 SND_CTL_ELEM_TYPE_LAST = SND_CTL_ELEM_TYPE_INTEGER64
88 } snd_ctl_elem_type_t;
89
91 typedef enum _snd_ctl_elem_iface {
93 SND_CTL_ELEM_IFACE_CARD = 0,
95 SND_CTL_ELEM_IFACE_HWDEP,
97 SND_CTL_ELEM_IFACE_MIXER,
99 SND_CTL_ELEM_IFACE_PCM,
101 SND_CTL_ELEM_IFACE_RAWMIDI,
103 SND_CTL_ELEM_IFACE_TIMER,
105 SND_CTL_ELEM_IFACE_SEQUENCER,
106 SND_CTL_ELEM_IFACE_LAST = SND_CTL_ELEM_IFACE_SEQUENCER
107 } snd_ctl_elem_iface_t;
108
110 typedef enum _snd_ctl_event_type {
112 SND_CTL_EVENT_ELEM = 0,
113 SND_CTL_EVENT_LAST = SND_CTL_EVENT_ELEM
114 }snd_ctl_event_type_t;
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 {
195 SND_CTL_TYPE_HW,
197 SND_CTL_TYPE_SHM,
199 SND_CTL_TYPE_INET,
201 SND_CTL_TYPE_EXT
202 } snd_ctl_type_t;
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); }
238 int snd_async_add_ctl_handler(snd_async_handler_t **handler, snd_ctl_t *ctl,
239 snd_async_callback_t callback, void *private_data);
240 snd_ctl_t *snd_async_handler_get_ctl(snd_async_handler_t *handler);
241 int snd_ctl_poll_descriptors_count(snd_ctl_t *ctl);
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);
245 int snd_ctl_card_info(snd_ctl_t *ctl, snd_ctl_card_info_t *info);
246 int snd_ctl_elem_list(snd_ctl_t *ctl, snd_ctl_elem_list_t *list);
247 int snd_ctl_elem_info(snd_ctl_t *ctl, snd_ctl_elem_info_t *info);
248 int snd_ctl_elem_read(snd_ctl_t *ctl, snd_ctl_elem_value_t *data);
249 int snd_ctl_elem_write(snd_ctl_t *ctl, snd_ctl_elem_value_t *data);
250 int snd_ctl_elem_lock(snd_ctl_t *ctl, snd_ctl_elem_id_t *id);
251 int snd_ctl_elem_unlock(snd_ctl_t *ctl, snd_ctl_elem_id_t *id);
252 int snd_ctl_elem_tlv_read(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id,
253 unsigned int *tlv, unsigned int tlv_size);
254 int snd_ctl_elem_tlv_write(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id,
255 const unsigned int *tlv);
256 int snd_ctl_elem_tlv_command(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id,
257 const unsigned int *tlv);
258 #ifdef __ALSA_HWDEP_H
259 int snd_ctl_hwdep_next_device(snd_ctl_t *ctl, int * device);
260 int snd_ctl_hwdep_info(snd_ctl_t *ctl, snd_hwdep_info_t * info);
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);
269 int snd_ctl_rawmidi_info(snd_ctl_t *ctl, snd_rawmidi_info_t * info);
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);
278 snd_ctl_type_t snd_ctl_type(snd_ctl_t *ctl);
279
280 const char *snd_ctl_elem_type_name(snd_ctl_elem_type_t type);
281 const char *snd_ctl_elem_iface_name(snd_ctl_elem_iface_t iface);
282 const char *snd_ctl_event_type_name(snd_ctl_event_type_t type);
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);
286 void snd_ctl_event_elem_get_id(const snd_ctl_event_t *obj, snd_ctl_elem_id_t *ptr);
287 snd_ctl_elem_iface_t snd_ctl_event_elem_get_interface(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);
294 void snd_ctl_elem_list_free_space(snd_ctl_elem_list_t *obj);
295
296 char *snd_ctl_ascii_elem_id_get(snd_ctl_elem_id_t *id);
297 int snd_ctl_ascii_elem_id_parse(snd_ctl_elem_id_t *dst, const char *str);
298 int snd_ctl_ascii_value_parse(snd_ctl_t *handle,
299 snd_ctl_elem_value_t *dst,
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)
309 int snd_ctl_elem_id_malloc(snd_ctl_elem_id_t **ptr);
310 void snd_ctl_elem_id_free(snd_ctl_elem_id_t *obj);
311 void snd_ctl_elem_id_clear(snd_ctl_elem_id_t *obj);
312 void snd_ctl_elem_id_copy(snd_ctl_elem_id_t *dst, const snd_ctl_elem_id_t *src);
313 unsigned int snd_ctl_elem_id_get_numid(const snd_ctl_elem_id_t *obj);
314 snd_ctl_elem_iface_t snd_ctl_elem_id_get_interface(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);
320 void snd_ctl_elem_id_set_interface(snd_ctl_elem_id_t *obj, snd_ctl_elem_iface_t 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)
332 int snd_ctl_card_info_malloc(snd_ctl_card_info_t **ptr);
333 void snd_ctl_card_info_free(snd_ctl_card_info_t *obj);
334 void snd_ctl_card_info_clear(snd_ctl_card_info_t *obj);
335 void snd_ctl_card_info_copy(snd_ctl_card_info_t *dst, const snd_ctl_card_info_t *src);
336 int snd_ctl_card_info_get_card(const snd_ctl_card_info_t *obj);
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);
340 const char *snd_ctl_card_info_get_longname(const snd_ctl_card_info_t *obj);
341 const char *snd_ctl_card_info_get_mixername(const snd_ctl_card_info_t *obj);
342 const char *snd_ctl_card_info_get_components(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)
350 int snd_ctl_event_malloc(snd_ctl_event_t **ptr);
351 void snd_ctl_event_free(snd_ctl_event_t *obj);
352 void snd_ctl_event_clear(snd_ctl_event_t *obj);
353 void snd_ctl_event_copy(snd_ctl_event_t *dst, const snd_ctl_event_t *src);
354 snd_ctl_event_type_t snd_ctl_event_get_type(const snd_ctl_event_t *obj);
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)
362 int snd_ctl_elem_list_malloc(snd_ctl_elem_list_t **ptr);
363 void snd_ctl_elem_list_free(snd_ctl_elem_list_t *obj);
364 void snd_ctl_elem_list_clear(snd_ctl_elem_list_t *obj);
365 void snd_ctl_elem_list_copy(snd_ctl_elem_list_t *dst, const snd_ctl_elem_list_t *src);
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);
371 snd_ctl_elem_iface_t snd_ctl_elem_list_get_interface(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)
383 int snd_ctl_elem_info_malloc(snd_ctl_elem_info_t **ptr);
384 void snd_ctl_elem_info_free(snd_ctl_elem_info_t *obj);
385 void snd_ctl_elem_info_clear(snd_ctl_elem_info_t *obj);
386 void snd_ctl_elem_info_copy(snd_ctl_elem_info_t *dst, const snd_ctl_elem_info_t *src);
387 snd_ctl_elem_type_t snd_ctl_elem_info_get_type(const snd_ctl_elem_info_t *obj);
388 int snd_ctl_elem_info_is_readable(const snd_ctl_elem_info_t *obj);
389 int snd_ctl_elem_info_is_writable(const snd_ctl_elem_info_t *obj);
390 int snd_ctl_elem_info_is_volatile(const snd_ctl_elem_info_t *obj);
391 int snd_ctl_elem_info_is_inactive(const snd_ctl_elem_info_t *obj);
392 int snd_ctl_elem_info_is_locked(const snd_ctl_elem_info_t *obj);
393 int snd_ctl_elem_info_is_tlv_readable(const snd_ctl_elem_info_t *obj);
394 int snd_ctl_elem_info_is_tlv_writable(const snd_ctl_elem_info_t *obj);
395 int snd_ctl_elem_info_is_tlv_commandable(const snd_ctl_elem_info_t *obj);
396 int snd_ctl_elem_info_is_owner(const snd_ctl_elem_info_t *obj);
397 int snd_ctl_elem_info_is_user(const snd_ctl_elem_info_t *obj);
398 pid_t snd_ctl_elem_info_get_owner(const snd_ctl_elem_info_t *obj);
399 unsigned int snd_ctl_elem_info_get_count(const snd_ctl_elem_info_t *obj);
400 long snd_ctl_elem_info_get_min(const snd_ctl_elem_info_t *obj);
401 long snd_ctl_elem_info_get_max(const snd_ctl_elem_info_t *obj);
402 long snd_ctl_elem_info_get_step(const snd_ctl_elem_info_t *obj);
403 long long snd_ctl_elem_info_get_min64(const snd_ctl_elem_info_t *obj);
404 long long snd_ctl_elem_info_get_max64(const snd_ctl_elem_info_t *obj);
405 long long snd_ctl_elem_info_get_step64(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);
408 const char *snd_ctl_elem_info_get_item_name(const snd_ctl_elem_info_t *obj);
409 int snd_ctl_elem_info_get_dimensions(const snd_ctl_elem_info_t *obj);
410 int snd_ctl_elem_info_get_dimension(const snd_ctl_elem_info_t *obj, unsigned int idx);
411 int snd_ctl_elem_info_set_dimension(snd_ctl_elem_info_t *info,
412 const int dimension[4]);
413 void snd_ctl_elem_info_get_id(const snd_ctl_elem_info_t *obj, snd_ctl_elem_id_t *ptr);
414 unsigned int snd_ctl_elem_info_get_numid(const snd_ctl_elem_info_t *obj);
415 snd_ctl_elem_iface_t snd_ctl_elem_info_get_interface(const snd_ctl_elem_info_t *obj);
416 unsigned int snd_ctl_elem_info_get_device(const snd_ctl_elem_info_t *obj);
417 unsigned int snd_ctl_elem_info_get_subdevice(const snd_ctl_elem_info_t *obj);
418 const char *snd_ctl_elem_info_get_name(const snd_ctl_elem_info_t *obj);
419 unsigned int snd_ctl_elem_info_get_index(const snd_ctl_elem_info_t *obj);
420 void snd_ctl_elem_info_set_id(snd_ctl_elem_info_t *obj, const snd_ctl_elem_id_t *ptr);
421 void snd_ctl_elem_info_set_numid(snd_ctl_elem_info_t *obj, unsigned int val);
422 void snd_ctl_elem_info_set_interface(snd_ctl_elem_info_t *obj, snd_ctl_elem_iface_t val);
423 void snd_ctl_elem_info_set_device(snd_ctl_elem_info_t *obj, unsigned int val);
424 void snd_ctl_elem_info_set_subdevice(snd_ctl_elem_info_t *obj, unsigned int val);
425 void snd_ctl_elem_info_set_name(snd_ctl_elem_info_t *obj, const char *val);
426 void snd_ctl_elem_info_set_index(snd_ctl_elem_info_t *obj, unsigned int val);
427
428 int snd_ctl_add_integer_elem_set(snd_ctl_t *ctl, snd_ctl_elem_info_t *info,
429 unsigned int element_count,
430 unsigned int member_count,
431 long min, long max, long step);
432 int snd_ctl_add_integer64_elem_set(snd_ctl_t *ctl, snd_ctl_elem_info_t *info,
433 unsigned int element_count,
434 unsigned int member_count,
435 long long min, long long max,
436 long long step);
437 int snd_ctl_add_boolean_elem_set(snd_ctl_t *ctl, snd_ctl_elem_info_t *info,
438 unsigned int element_count,
439 unsigned int member_count);
440 int snd_ctl_add_enumerated_elem_set(snd_ctl_t *ctl, snd_ctl_elem_info_t *info,
441 unsigned int element_count,
442 unsigned int member_count,
443 unsigned int items,
444 const char *const labels[]);
445 int snd_ctl_add_bytes_elem_set(snd_ctl_t *ctl, snd_ctl_elem_info_t *info,
446 unsigned int element_count,
447 unsigned int member_count);
448
449 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);
450 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);
451 int snd_ctl_elem_add_boolean(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id, unsigned int count);
452 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[]);
453 int snd_ctl_elem_add_iec958(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id);
454 int snd_ctl_elem_remove(snd_ctl_t *ctl, snd_ctl_elem_id_t *id);
455
456 size_t snd_ctl_elem_value_sizeof(void);
461 #define snd_ctl_elem_value_alloca(ptr) __snd_alloca(ptr, snd_ctl_elem_value)
462 int snd_ctl_elem_value_malloc(snd_ctl_elem_value_t **ptr);
463 void snd_ctl_elem_value_free(snd_ctl_elem_value_t *obj);
464 void snd_ctl_elem_value_clear(snd_ctl_elem_value_t *obj);
465 void snd_ctl_elem_value_copy(snd_ctl_elem_value_t *dst, const snd_ctl_elem_value_t *src);
466 int snd_ctl_elem_value_compare(snd_ctl_elem_value_t *left, const snd_ctl_elem_value_t *right);
467 void snd_ctl_elem_value_get_id(const snd_ctl_elem_value_t *obj, snd_ctl_elem_id_t *ptr);
468 unsigned int snd_ctl_elem_value_get_numid(const snd_ctl_elem_value_t *obj);
469 snd_ctl_elem_iface_t snd_ctl_elem_value_get_interface(const snd_ctl_elem_value_t *obj);
470 unsigned int snd_ctl_elem_value_get_device(const snd_ctl_elem_value_t *obj);
471 unsigned int snd_ctl_elem_value_get_subdevice(const snd_ctl_elem_value_t *obj);
472 const char *snd_ctl_elem_value_get_name(const snd_ctl_elem_value_t *obj);
473 unsigned int snd_ctl_elem_value_get_index(const snd_ctl_elem_value_t *obj);
474 void snd_ctl_elem_value_set_id(snd_ctl_elem_value_t *obj, const snd_ctl_elem_id_t *ptr);
475 void snd_ctl_elem_value_set_numid(snd_ctl_elem_value_t *obj, unsigned int val);
476 void snd_ctl_elem_value_set_interface(snd_ctl_elem_value_t *obj, snd_ctl_elem_iface_t val);
477 void snd_ctl_elem_value_set_device(snd_ctl_elem_value_t *obj, unsigned int val);
478 void snd_ctl_elem_value_set_subdevice(snd_ctl_elem_value_t *obj, unsigned int val);
479 void snd_ctl_elem_value_set_name(snd_ctl_elem_value_t *obj, const char *val);
480 void snd_ctl_elem_value_set_index(snd_ctl_elem_value_t *obj, unsigned int val);
481 int snd_ctl_elem_value_get_boolean(const snd_ctl_elem_value_t *obj, unsigned int idx);
482 long snd_ctl_elem_value_get_integer(const snd_ctl_elem_value_t *obj, unsigned int idx);
483 long long snd_ctl_elem_value_get_integer64(const snd_ctl_elem_value_t *obj, unsigned int idx);
484 unsigned int snd_ctl_elem_value_get_enumerated(const snd_ctl_elem_value_t *obj, unsigned int idx);
485 unsigned char snd_ctl_elem_value_get_byte(const snd_ctl_elem_value_t *obj, unsigned int idx);
486 void snd_ctl_elem_value_set_boolean(snd_ctl_elem_value_t *obj, unsigned int idx, long val);
487 void snd_ctl_elem_value_set_integer(snd_ctl_elem_value_t *obj, unsigned int idx, long val);
488 void snd_ctl_elem_value_set_integer64(snd_ctl_elem_value_t *obj, unsigned int idx, long long val);
489 void snd_ctl_elem_value_set_enumerated(snd_ctl_elem_value_t *obj, unsigned int idx, unsigned int val);
490 void snd_ctl_elem_value_set_byte(snd_ctl_elem_value_t *obj, unsigned int idx, unsigned char val);
491 void snd_ctl_elem_set_bytes(snd_ctl_elem_value_t *obj, void *data, size_t size);
492 const void * snd_ctl_elem_value_get_bytes(const snd_ctl_elem_value_t *obj);
493 void snd_ctl_elem_value_get_iec958(const snd_ctl_elem_value_t *obj, snd_aes_iec958_t *ptr);
494 void snd_ctl_elem_value_set_iec958(snd_ctl_elem_value_t *obj, const snd_aes_iec958_t *ptr);
495
496 int snd_tlv_parse_dB_info(unsigned int *tlv, unsigned int tlv_size,
497 unsigned int **db_tlvp);
498 int snd_tlv_get_dB_range(unsigned int *tlv, long rangemin, long rangemax,
499 long *min, long *max);
500 int snd_tlv_convert_to_dB(unsigned int *tlv, long rangemin, long rangemax,
501 long volume, long *db_gain);
502 int snd_tlv_convert_from_dB(unsigned int *tlv, long rangemin, long rangemax,
503 long db_gain, long *value, int xdir);
504 int snd_ctl_get_dB_range(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id,
505 long *min, long *max);
506 int snd_ctl_convert_to_dB(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id,
507 long volume, long *db_gain);
508 int snd_ctl_convert_from_dB(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id,
509 long db_gain, long *value, int xdir);
510
520 typedef struct _snd_hctl_elem snd_hctl_elem_t;
521
523 typedef struct _snd_hctl snd_hctl_t;
524
531 typedef int (*snd_hctl_compare_t)(const snd_hctl_elem_t *e1,
532 const snd_hctl_elem_t *e2);
533 int snd_hctl_compare_fast(const snd_hctl_elem_t *c1,
534 const snd_hctl_elem_t *c2);
542 typedef int (*snd_hctl_callback_t)(snd_hctl_t *hctl,
543 unsigned int mask,
544 snd_hctl_elem_t *elem);
551 typedef int (*snd_hctl_elem_callback_t)(snd_hctl_elem_t *elem,
552 unsigned int mask);
553
554 int snd_hctl_open(snd_hctl_t **hctl, const char *name, int mode);
555 int snd_hctl_open_ctl(snd_hctl_t **hctlp, snd_ctl_t *ctl);
556 int snd_hctl_close(snd_hctl_t *hctl);
557 int snd_hctl_nonblock(snd_hctl_t *hctl, int nonblock);
558 static __inline__ int snd_hctl_abort(snd_hctl_t *hctl) { return snd_hctl_nonblock(hctl, 2); }
559 int snd_hctl_poll_descriptors_count(snd_hctl_t *hctl);
560 int snd_hctl_poll_descriptors(snd_hctl_t *hctl, struct pollfd *pfds, unsigned int space);
561 int snd_hctl_poll_descriptors_revents(snd_hctl_t *ctl, struct pollfd *pfds, unsigned int nfds, unsigned short *revents);
562 unsigned int snd_hctl_get_count(snd_hctl_t *hctl);
563 int snd_hctl_set_compare(snd_hctl_t *hctl, snd_hctl_compare_t hsort);
564 snd_hctl_elem_t *snd_hctl_first_elem(snd_hctl_t *hctl);
565 snd_hctl_elem_t *snd_hctl_last_elem(snd_hctl_t *hctl);
566 snd_hctl_elem_t *snd_hctl_find_elem(snd_hctl_t *hctl, const snd_ctl_elem_id_t *id);
567 void snd_hctl_set_callback(snd_hctl_t *hctl, snd_hctl_callback_t callback);
568 void snd_hctl_set_callback_private(snd_hctl_t *hctl, void *data);
569 void *snd_hctl_get_callback_private(snd_hctl_t *hctl);
570 int snd_hctl_load(snd_hctl_t *hctl);
571 int snd_hctl_free(snd_hctl_t *hctl);
572 int snd_hctl_handle_events(snd_hctl_t *hctl);
573 const char *snd_hctl_name(snd_hctl_t *hctl);
574 int snd_hctl_wait(snd_hctl_t *hctl, int timeout);
575 snd_ctl_t *snd_hctl_ctl(snd_hctl_t *hctl);
576
577 snd_hctl_elem_t *snd_hctl_elem_next(snd_hctl_elem_t *elem);
578 snd_hctl_elem_t *snd_hctl_elem_prev(snd_hctl_elem_t *elem);
579 int snd_hctl_elem_info(snd_hctl_elem_t *elem, snd_ctl_elem_info_t * info);
580 int snd_hctl_elem_read(snd_hctl_elem_t *elem, snd_ctl_elem_value_t * value);
581 int snd_hctl_elem_write(snd_hctl_elem_t *elem, snd_ctl_elem_value_t * value);
582 int snd_hctl_elem_tlv_read(snd_hctl_elem_t *elem, unsigned int *tlv, unsigned int tlv_size);
583 int snd_hctl_elem_tlv_write(snd_hctl_elem_t *elem, const unsigned int *tlv);
584 int snd_hctl_elem_tlv_command(snd_hctl_elem_t *elem, const unsigned int *tlv);
585
586 snd_hctl_t *snd_hctl_elem_get_hctl(snd_hctl_elem_t *elem);
587
588 void snd_hctl_elem_get_id(const snd_hctl_elem_t *obj, snd_ctl_elem_id_t *ptr);
589 unsigned int snd_hctl_elem_get_numid(const snd_hctl_elem_t *obj);
590 snd_ctl_elem_iface_t snd_hctl_elem_get_interface(const snd_hctl_elem_t *obj);
591 unsigned int snd_hctl_elem_get_device(const snd_hctl_elem_t *obj);
592 unsigned int snd_hctl_elem_get_subdevice(const snd_hctl_elem_t *obj);
593 const char *snd_hctl_elem_get_name(const snd_hctl_elem_t *obj);
594 unsigned int snd_hctl_elem_get_index(const snd_hctl_elem_t *obj);
595 void snd_hctl_elem_set_callback(snd_hctl_elem_t *obj, snd_hctl_elem_callback_t val);
596 void * snd_hctl_elem_get_callback_private(const snd_hctl_elem_t *obj);
597 void snd_hctl_elem_set_callback_private(snd_hctl_elem_t *obj, void * val);
598
610 int snd_sctl_build(snd_sctl_t **ctl, snd_ctl_t *handle, snd_config_t *config,
611 snd_config_t *private_data, int mode);
612 int snd_sctl_free(snd_sctl_t *handle);
613 int snd_sctl_install(snd_sctl_t *handle);
614 int snd_sctl_remove(snd_sctl_t *handle);
615
618 #ifdef __cplusplus
619 }
620 #endif
621
622 #endif /* __ALSA_CONTROL_H */
snd_hctl_elem_read
int snd_hctl_elem_read(snd_hctl_elem_t *elem, snd_ctl_elem_value_t *value)
Get value for an HCTL element.
Definition: hcontrol.c:820
snd_ctl_elem_info_set_dimension
int snd_ctl_elem_info_set_dimension(snd_ctl_elem_info_t *info, const int dimension[4])
Set width to a specified dimension level of given element information.
Definition: control.c:2557
snd_ctl_hwdep_next_device
int snd_ctl_hwdep_next_device(snd_ctl_t *ctl, int *device)
Get next hardware dependent device number.
Definition: control.c:1027
snd_ctl_elem_value_get_enumerated
unsigned int snd_ctl_elem_value_get_enumerated(const snd_ctl_elem_value_t *obj, unsigned int idx)
Get value of a specified member from given data as an element of enumerated type. ...
Definition: control.c:3000
SND_CTL_TYPE_EXT
Definition: control.h:201
snd_ctl_elem_iface_name
const char * snd_ctl_elem_iface_name(snd_ctl_elem_iface_t iface)
get name of a CTL element related interface
Definition: control.c:1486
snd_ctl_event_sizeof
size_t snd_ctl_event_sizeof(void)
get size of snd_ctl_event_t
Definition: control.c:1953
snd_ctl_elem_info_get_min64
long long snd_ctl_elem_info_get_min64(const snd_ctl_elem_info_t *obj)
Get minimum value from a SND_CTL_ELEM_TYPE_INTEGER64 CTL element id/info.
Definition: control.c:2436
snd_ctl_elem_list_sizeof
size_t snd_ctl_elem_list_sizeof(void)
get size of snd_ctl_elem_list_t
Definition: control.c:2016
snd_hctl_poll_descriptors_revents
int snd_hctl_poll_descriptors_revents(snd_hctl_t *ctl, struct pollfd *pfds, unsigned int nfds, unsigned short *revents)
get returned events from poll descriptors
Definition: hcontrol.c:195
snd_hctl_get_callback_private
void * snd_hctl_get_callback_private(snd_hctl_t *hctl)
Get callback private value for an HCTL.
Definition: hcontrol.c:651
snd_ctl_elem_type_t
snd_ctl_elem_type_t
Definition: control.h:72
snd_ctl_card_info_t
struct _snd_ctl_card_info snd_ctl_card_info_t
Definition: control.h:54
snd_ctl_add_integer_elem_set
int snd_ctl_add_integer_elem_set(snd_ctl_t *ctl, snd_ctl_elem_info_t *info, unsigned int element_count, unsigned int member_count, long min, long max, long step)
Create and add some user-defined control elements of integer type.
Definition: control.c:374
snd_card_next
int snd_card_next(int *card)
Try to determine the next card.
Definition: cards.c:98
snd_ctl_convert_from_dB
int snd_ctl_convert_from_dB(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id, long db_gain, long *value, int xdir)
Convert from dB gain to the raw volume value on the given control element.
Definition: tlv.c:486
snd_ctl_elem_value_compare
int snd_ctl_elem_value_compare(snd_ctl_elem_value_t *left, const snd_ctl_elem_value_t *right)
Compare one data of an element to the other.
Definition: control.c:2788
snd_ctl_elem_info_get_items
unsigned int snd_ctl_elem_info_get_items(const snd_ctl_elem_info_t *obj)
Get number of items available from a SND_CTL_ELEM_TYPE_ENUMERATED CTL element id/info.
Definition: control.c:2472
snd_ctl_elem_info_get_numid
unsigned int snd_ctl_elem_info_get_numid(const snd_ctl_elem_info_t *obj)
Get element numeric identifier of a CTL element id/info.
Definition: control.c:2591
snd_ctl_rawmidi_info
int snd_ctl_rawmidi_info(snd_ctl_t *ctl, snd_rawmidi_info_t *info)
Get info about a RawMidi device.
Definition: control.c:1099
snd_ctl_convert_to_dB
int snd_ctl_convert_to_dB(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id, long volume, long *db_gain)
Convert the volume value to dB on the given control element.
Definition: tlv.c:463
SND_CTL_ELEM_IFACE_SEQUENCER
Definition: control.h:105
snd_ctl_elem_info_set_id
void snd_ctl_elem_info_set_id(snd_ctl_elem_info_t *obj, const snd_ctl_elem_id_t *ptr)
Set CTL element identifier of a CTL element id/info.
Definition: control.c:2657
snd_ctl_card_info_copy
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:1866
snd_ctl_add_boolean_elem_set
int snd_ctl_add_boolean_elem_set(snd_ctl_t *ctl, snd_ctl_elem_info_t *info, unsigned int element_count, unsigned int member_count)
Create and add some user-defined control elements of boolean type.
Definition: control.c:550
snd_ctl_pcm_next_device
int snd_ctl_pcm_next_device(snd_ctl_t *ctl, int *device)
Get next PCM device number.
Definition: control.c:1051
snd_ctl_elem_info_get_dimension
int snd_ctl_elem_info_get_dimension(const snd_ctl_elem_info_t *obj, unsigned int idx)
Get specified of dimension width for given element.
Definition: control.c:2532
snd_ctl_elem_value_get_index
unsigned int snd_ctl_elem_value_get_index(const snd_ctl_elem_value_t *obj)
Get index part of element identifier from given data of an element.
Definition: control.c:2868
snd_ctl_elem_info_is_tlv_writable
int snd_ctl_elem_info_is_tlv_writable(const snd_ctl_elem_info_t *obj)
Get info about TLV writeability from a CTL element id/info.
Definition: control.c:2344
snd_hctl_free
int snd_hctl_free(snd_hctl_t *hctl)
free HCTL loaded elements
Definition: hcontrol.c:402
snd_hctl_set_callback_private
void snd_hctl_set_callback_private(snd_hctl_t *hctl, void *data)
Set callback private value for an HCTL.
Definition: hcontrol.c:640
snd_ctl_elem_info_is_readable
int snd_ctl_elem_info_is_readable(const snd_ctl_elem_info_t *obj)
Get info about readability from a CTL element id/info.
Definition: control.c:2256
snd_ctl_elem_info_get_device
unsigned int snd_ctl_elem_info_get_device(const snd_ctl_elem_info_t *obj)
Get device part of CTL element identifier of a CTL element id/info.
Definition: control.c:2613
snd_ctl_elem_info_get_type
snd_ctl_elem_type_t snd_ctl_elem_info_get_type(const snd_ctl_elem_info_t *obj)
Get type from a CTL element id/info.
Definition: control.c:2245
snd_ctl_elem_list_get_count
unsigned int snd_ctl_elem_list_get_count(const snd_ctl_elem_list_t *obj)
Get total count of elements present in CTL device (information present in every filled CTL element id...
Definition: control.c:2091
snd_async_callback_t
void(* snd_async_callback_t)(snd_async_handler_t *handler)
Async notification callback.
Definition: global.h:121
SND_CTL_ELEM_TYPE_BOOLEAN
Definition: control.h:76
snd_hctl_elem_write
int snd_hctl_elem_write(snd_hctl_elem_t *elem, snd_ctl_elem_value_t *value)
Set value for an HCTL element.
Definition: hcontrol.c:837
snd_ctl_elem_value_get_subdevice
unsigned int snd_ctl_elem_value_get_subdevice(const snd_ctl_elem_value_t *obj)
Get subdevice part of element identifier from given data of an element.
Definition: control.c:2846
snd_hctl_elem_callback_t
int(* snd_hctl_elem_callback_t)(snd_hctl_elem_t *elem, unsigned int mask)
HCTL element callback function.
Definition: control.h:551
snd_card_load
int snd_card_load(int card)
Try to load the driver for a card.
Definition: cards.c:83
SND_CTL_TYPE_INET
Definition: control.h:199
snd_ctl_elem_info_get_item_name
const char * snd_ctl_elem_info_get_item_name(const snd_ctl_elem_info_t *obj)
Get name for selected item in a SND_CTL_ELEM_TYPE_ENUMERATED CTL element id/info. ...
Definition: control.c:2495
snd_ctl_event_elem_get_numid
unsigned int snd_ctl_event_elem_get_numid(const snd_ctl_event_t *obj)
Get element numeric identifier for an element related event.
Definition: control.c:1561
snd_ctl_elem_id_set_numid
void snd_ctl_elem_id_set_numid(snd_ctl_elem_id_t *obj, unsigned int val)
Set numeric identifier for a CTL element identifier.
Definition: control.c:1759
snd_ctl_elem_info_get_owner
pid_t snd_ctl_elem_info_get_owner(const snd_ctl_elem_info_t *obj)
Get owner of a locked element.
Definition: control.c:2378
snd_rawmidi_info_t
struct _snd_rawmidi_info snd_rawmidi_info_t
Definition: rawmidi.h:45
snd_ctl_elem_value_set_index
void snd_ctl_elem_value_set_index(snd_ctl_elem_value_t *obj, unsigned int val)
Set index part of element identifier to given data of an element.
Definition: control.c:2945
SND_CTL_EVENT_ELEM
Definition: control.h:112
snd_hctl_compare_fast
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
snd_pcm_info_t
struct _snd_pcm_info snd_pcm_info_t
Definition: pcm.h:46
snd_ctl_elem_value_free
void snd_ctl_elem_value_free(snd_ctl_elem_value_t *obj)
Frees a previously allocated data of an element.
Definition: control.c:2756
snd_ctl_elem_info_is_locked
int snd_ctl_elem_info_is_locked(const snd_ctl_elem_info_t *obj)
Get info whether an element is locked.
Definition: control.c:2300
snd_ctl_elem_value_set_boolean
void snd_ctl_elem_value_set_boolean(snd_ctl_elem_value_t *obj, unsigned int idx, long val)
Set value of a specified member to given data as an element of boolean type.
Definition: control.c:3028
snd_ctl_event_copy
void snd_ctl_event_copy(snd_ctl_event_t *dst, const snd_ctl_event_t *src)
copy one snd_ctl_event_t to another
Definition: control.c:1995
snd_ctl_elem_id_get_subdevice
unsigned int snd_ctl_elem_id_get_subdevice(const snd_ctl_elem_id_t *obj)
Get subdevice part of a CTL element identifier.
Definition: control.c:1726
snd_ctl_elem_info_get_max
long snd_ctl_elem_info_get_max(const snd_ctl_elem_info_t *obj)
Get maximum value from a SND_CTL_ELEM_TYPE_INTEGER CTL element id/info.
Definition: control.c:2412
snd_ctl_elem_value_set_iec958
void snd_ctl_elem_value_set_iec958(snd_ctl_elem_value_t *obj, const snd_aes_iec958_t *ptr)
Set value from given pointer to given data as an element of IEC958 type.
Definition: control.c:3133
snd_ctl_event_malloc
int snd_ctl_event_malloc(snd_ctl_event_t **ptr)
allocate an invalid snd_ctl_event_t using standard malloc
Definition: control.c:1963
snd_ctl_elem_value_get_bytes
const void * snd_ctl_elem_value_get_bytes(const snd_ctl_elem_value_t *obj)
Get memory block from given data as an element of bytes type.
Definition: control.c:3109
snd_aes_iec958_t
Definition: control.h:46
snd_ctl_poll_descriptors
int snd_ctl_poll_descriptors(snd_ctl_t *ctl, struct pollfd *pfds, unsigned int space)
get poll descriptors
Definition: control.c:221
snd_ctl_elem_value_get_integer
long snd_ctl_elem_value_get_integer(const snd_ctl_elem_value_t *obj, unsigned int idx)
Get value of a specified member from given data as an element of integer type.
Definition: control.c:2972
snd_hctl_nonblock
int snd_hctl_nonblock(snd_hctl_t *hctl, int nonblock)
set nonblock mode
Definition: hcontrol.c:142
snd_hctl_elem_get_device
unsigned int snd_hctl_elem_get_device(const snd_hctl_elem_t *obj)
Get device part of CTL element identifier of a CTL element id/value.
Definition: hcontrol.c:942
snd_ctl_t
struct _snd_ctl snd_ctl_t
Definition: control.h:214
snd_hctl_set_callback
void snd_hctl_set_callback(snd_hctl_t *hctl, snd_hctl_callback_t callback)
Set callback function for an HCTL.
Definition: hcontrol.c:629
SND_CTL_ELEM_TYPE_IEC958
Definition: control.h:84
snd_ctl_elem_tlv_write
int snd_ctl_elem_tlv_write(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id, const unsigned int *tlv)
Write structured data from given buffer to an element set.
Definition: control.c:966
snd_ctl_elem_value_set_numid
void snd_ctl_elem_value_set_numid(snd_ctl_elem_value_t *obj, unsigned int val)
Set numeric identifier to given data of an element.
Definition: control.c:2890
snd_ctl_elem_id_clear
void snd_ctl_elem_id_clear(snd_ctl_elem_id_t *obj)
clear given snd_ctl_elem_id_t object
Definition: control.c:1672
snd_ctl_elem_value_get_interface
snd_ctl_elem_iface_t snd_ctl_elem_value_get_interface(const snd_ctl_elem_value_t *obj)
Get interface part of element identifier from given data of an element.
Definition: control.c:2823
snd_ctl_elem_value_get_device
unsigned int snd_ctl_elem_value_get_device(const snd_ctl_elem_value_t *obj)
Get device part of element identifier from given data of an element.
Definition: control.c:2834
snd_ctl_elem_info_clear
void snd_ctl_elem_info_clear(snd_ctl_elem_info_t *obj)
clear given snd_ctl_elem_info_t object
Definition: control.c:2224
snd_ctl_event_get_type
snd_ctl_event_type_t snd_ctl_event_get_type(const snd_ctl_event_t *obj)
Get type of a CTL event.
Definition: control.c:2006
snd_ctl_elem_value_t
struct _snd_ctl_elem_value snd_ctl_elem_value_t
Definition: control.h:66
snd_ctl_elem_info_get_min
long snd_ctl_elem_info_get_min(const snd_ctl_elem_info_t *obj)
Get minimum value from a SND_CTL_ELEM_TYPE_INTEGER CTL element id/info.
Definition: control.c:2400
snd_hctl_callback_t
int(* snd_hctl_callback_t)(snd_hctl_t *hctl, unsigned int mask, snd_hctl_elem_t *elem)
HCTL callback function.
Definition: control.h:542
snd_ctl_event_elem_get_name
const char * snd_ctl_event_elem_get_name(const snd_ctl_event_t *obj)
Get name part of CTL element identifier for an element related event.
Definition: control.c:1609
snd_ctl_elem_unlock
int snd_ctl_elem_unlock(snd_ctl_t *ctl, snd_ctl_elem_id_t *id)
Unlock CTL element.
Definition: control.c:1015
snd_ctl_nonblock
int snd_ctl_nonblock(snd_ctl_t *ctl, int nonblock)
set nonblock mode
Definition: control.c:152
snd_ctl_elem_iface_t
snd_ctl_elem_iface_t
Definition: control.h:91
snd_hctl_get_count
unsigned int snd_hctl_get_count(snd_hctl_t *hctl)
Get number of loaded elements for an HCTL.
Definition: hcontrol.c:662
snd_hctl_last_elem
snd_hctl_elem_t * snd_hctl_last_elem(snd_hctl_t *hctl)
get last element for an HCTL
Definition: hcontrol.c:511
snd_ctl_elem_info_get_interface
snd_ctl_elem_iface_t snd_ctl_elem_info_get_interface(const snd_ctl_elem_info_t *obj)
Get interface part of CTL element identifier of a CTL element id/info.
Definition: control.c:2602
SND_CTL_ELEM_IFACE_TIMER
Definition: control.h:103
snd_ctl_type_t
snd_ctl_type_t
Definition: control.h:193
snd_device_name_hint
int snd_device_name_hint(int card, const char *iface, void ***hints)
Get a set of device name hints.
Definition: namehint.c:548
snd_hctl_open_ctl
int snd_hctl_open_ctl(snd_hctl_t **hctlp, snd_ctl_t *ctl)
Opens an HCTL.
Definition: hcontrol.c:89
snd_ctl_elem_add_boolean
int snd_ctl_elem_add_boolean(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id, unsigned int count)
Create and add an user-defined control element of boolean type.
Definition: control.c:771
snd_ctl_card_info
int snd_ctl_card_info(snd_ctl_t *ctl, snd_ctl_card_info_t *info)
Get card related information.
Definition: control.c:275
snd_ctl_elem_list_get_device
unsigned int snd_ctl_elem_list_get_device(const snd_ctl_elem_list_t *obj, unsigned int idx)
Get device part of CTL element identifier for an entry of a CTL element identifiers list...
Definition: control.c:2142
snd_ctl_event_elem_get_interface
snd_ctl_elem_iface_t snd_ctl_event_elem_get_interface(const snd_ctl_event_t *obj)
Get interface part of CTL element identifier for an element related event.
Definition: control.c:1573
snd_ctl_card_info_get_mixername
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:1932
snd_ctl_elem_list_get_numid
unsigned int snd_ctl_elem_list_get_numid(const snd_ctl_elem_list_t *obj, unsigned int idx)
Get CTL element numeric identifier for an entry of a CTL element identifiers list.
Definition: control.c:2116
snd_ctl_elem_id_get_device
unsigned int snd_ctl_elem_id_get_device(const snd_ctl_elem_id_t *obj)
Get device part of a CTL element identifier.
Definition: control.c:1715
snd_ctl_elem_id_copy
void snd_ctl_elem_id_copy(snd_ctl_elem_id_t *dst, const snd_ctl_elem_id_t *src)
copy one snd_ctl_elem_id_t to another
Definition: control.c:1682
snd_ctl_elem_info_set_item
void snd_ctl_elem_info_set_item(snd_ctl_elem_info_t *obj, unsigned int val)
Select item in a SND_CTL_ELEM_TYPE_ENUMERATED CTL element id/info.
Definition: control.c:2484
snd_ctl_elem_tlv_command
int snd_ctl_elem_tlv_command(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id, const unsigned int *tlv)
Process structured data from given buffer for an element set.
Definition: control.c:990
snd_ctl_open
int snd_ctl_open(snd_ctl_t **ctl, const char *name, int mode)
Opens a CTL.
Definition: control.c:1388
snd_ctl_elem_info_set_index
void snd_ctl_elem_info_set_index(snd_ctl_elem_info_t *obj, unsigned int val)
Set index part of CTL element identifier of a CTL element id/info.
Definition: control.c:2723
snd_ctl_elem_lock
int snd_ctl_elem_lock(snd_ctl_t *ctl, snd_ctl_elem_id_t *id)
Lock CTL element.
Definition: control.c:1003
snd_ctl_elem_list_get_used
unsigned int snd_ctl_elem_list_get_used(const snd_ctl_elem_list_t *obj)
Get number of used entries in CTL element identifiers list.
Definition: control.c:2080
snd_hctl_load
int snd_hctl_load(snd_hctl_t *hctl)
Load an HCTL with all elements and sort them.
Definition: hcontrol.c:565
snd_ctl_event_elem_get_id
void snd_ctl_event_elem_get_id(const snd_ctl_event_t *obj, snd_ctl_elem_id_t *ptr)
Get CTL element identifier for an element related event.
Definition: control.c:1549
snd_ctl_elem_id_get_interface
snd_ctl_elem_iface_t snd_ctl_elem_id_get_interface(const snd_ctl_elem_id_t *obj)
Get interface part of a CTL element identifier.
Definition: control.c:1704
SND_CTL_ELEM_TYPE_ENUMERATED
Definition: control.h:80
snd_ctl_event_elem_get_mask
unsigned int snd_ctl_event_elem_get_mask(const snd_ctl_event_t *obj)
Get event mask for an element related event.
Definition: control.c:1537
snd_ctl_get_dB_range
int snd_ctl_get_dB_range(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id, long *min, long *max)
Get the dB min/max values on the given control element.
Definition: tlv.c:442
snd_hctl_elem_tlv_read
int snd_hctl_elem_tlv_read(snd_hctl_elem_t *elem, unsigned int *tlv, unsigned int tlv_size)
Get TLV value for an HCTL element.
Definition: hcontrol.c:853
snd_hctl_elem_get_index
unsigned int snd_hctl_elem_get_index(const snd_hctl_elem_t *obj)
Get index part of CTL element identifier of a CTL element id/value.
Definition: hcontrol.c:975
snd_ctl_elem_info_get_step
long snd_ctl_elem_info_get_step(const snd_ctl_elem_info_t *obj)
Get value step from a SND_CTL_ELEM_TYPE_INTEGER CTL element id/info.
Definition: control.c:2424
snd_ctl_elem_id_set_index
void snd_ctl_elem_id_set_index(snd_ctl_elem_id_t *obj, unsigned int val)
Set index part for a CTL element identifier.
Definition: control.c:1814
snd_ctl_elem_value_get_id
void snd_ctl_elem_value_get_id(const snd_ctl_elem_value_t *obj, snd_ctl_elem_id_t *ptr)
Get element identifier from given data of an element.
Definition: control.c:2800
snd_ctl_add_integer64_elem_set
int snd_ctl_add_integer64_elem_set(snd_ctl_t *ctl, snd_ctl_elem_info_t *info, unsigned int element_count, unsigned int member_count, long long min, long long max, long long step)
Create and add some user-defined control elements of integer64 type.
Definition: control.c:464
snd_ctl_pcm_prefer_subdevice
int snd_ctl_pcm_prefer_subdevice(snd_ctl_t *ctl, int subdev)
Set preferred PCM subdevice number of successive PCM open.
Definition: control.c:1075
snd_ctl_card_info_free
void snd_ctl_card_info_free(snd_ctl_card_info_t *obj)
frees a previously allocated snd_ctl_card_info_t
Definition: control.c:1847
snd_ctl_elem_list_get_name
const char * snd_ctl_elem_list_get_name(const snd_ctl_elem_list_t *obj, unsigned int idx)
Get name part of CTL element identifier for an entry of a CTL element identifiers list...
Definition: control.c:2168
snd_ctl_elem_info_is_owner
int snd_ctl_elem_info_is_owner(const snd_ctl_elem_info_t *obj)
Get info if I own an element.
Definition: control.c:2311
snd_ctl_elem_list_t
struct _snd_ctl_elem_list snd_ctl_elem_list_t
Definition: control.h:60
snd_ctl_elem_id_t
struct _snd_ctl_elem_id snd_ctl_elem_id_t
Definition: control.h:57
snd_ctl_elem_list
int snd_ctl_elem_list(snd_ctl_t *ctl, snd_ctl_elem_list_t *list)
Get a list of element identifiers.
Definition: control.c:287
snd_ctl_add_enumerated_elem_set
int snd_ctl_add_enumerated_elem_set(snd_ctl_t *ctl, snd_ctl_elem_info_t *info, unsigned int element_count, unsigned int member_count, unsigned int items, const char *const labels[])
Create and add some user-defined control elements of enumerated type.
Definition: control.c:615
snd_ctl_elem_value_set_byte
void snd_ctl_elem_value_set_byte(snd_ctl_elem_value_t *obj, unsigned int idx, unsigned char val)
Set value for a specified member to given data as an element of byte type.
Definition: control.c:3084
SND_CTL_ELEM_IFACE_PCM
Definition: control.h:99
snd_ctl_elem_value_set_name
void snd_ctl_elem_value_set_name(snd_ctl_elem_value_t *obj, const char *val)
Set name part of element identifier to given data of an element.
Definition: control.c:2934
snd_ctl_elem_info_get_dimensions
int snd_ctl_elem_info_get_dimensions(const snd_ctl_elem_info_t *obj)
Get count of dimensions for given element.
Definition: control.c:2510
snd_ctl_event_type_name
const char * snd_ctl_event_type_name(snd_ctl_event_type_t type)
get name of a CTL event type
Definition: control.c:1497
snd_ctl_elem_value_clear
void snd_ctl_elem_value_clear(snd_ctl_elem_value_t *obj)
Clear given data of an element.
Definition: control.c:2765
snd_tlv_get_dB_range
int snd_tlv_get_dB_range(unsigned int *tlv, long rangemin, long rangemax, long *min, long *max)
Get the dB min/max values.
Definition: tlv.c:129
snd_hwdep_info_t
struct _snd_hwdep_info snd_hwdep_info_t
Definition: hwdep.h:45
snd_hctl_elem_get_callback_private
void * snd_hctl_elem_get_callback_private(const snd_hctl_elem_t *obj)
Get callback private value for an HCTL element.
Definition: hcontrol.c:1008
snd_ctl_elem_info_is_tlv_commandable
int snd_ctl_elem_info_is_tlv_commandable(const snd_ctl_elem_info_t *obj)
Get info about TLV command possibility from a CTL element id/info.
Definition: control.c:2355
snd_ctl_elem_id_set_subdevice
void snd_ctl_elem_id_set_subdevice(snd_ctl_elem_id_t *obj, unsigned int val)
Set subdevice part for a CTL element identifier.
Definition: control.c:1792
snd_ctl_elem_value_set_subdevice
void snd_ctl_elem_value_set_subdevice(snd_ctl_elem_value_t *obj, unsigned int val)
Set subdevice part of element identifier to given data of an element.
Definition: control.c:2923
snd_hctl_compare_t
int(* snd_hctl_compare_t)(const snd_hctl_elem_t *e1, const snd_hctl_elem_t *e2)
Compare function for sorting HCTL elements.
Definition: control.h:531
snd_ctl_read
int snd_ctl_read(snd_ctl_t *ctl, snd_ctl_event_t *event)
Read an event.
Definition: control.c:1151
snd_device_name_free_hint
int snd_device_name_free_hint(void **hints)
Free a list of device name hints.
Definition: namehint.c:651
snd_hctl_elem_tlv_command
int snd_hctl_elem_tlv_command(snd_hctl_elem_t *elem, const unsigned int *tlv)
Set TLV value for an HCTL element.
Definition: hcontrol.c:885
snd_ctl_elem_info_get_id
void snd_ctl_elem_info_get_id(const snd_ctl_elem_info_t *obj, snd_ctl_elem_id_t *ptr)
Get CTL element identifier of a CTL element id/info.
Definition: control.c:2580
snd_ctl_ascii_elem_id_get
char * snd_ctl_ascii_elem_id_get(snd_ctl_elem_id_t *id)
return ASCII CTL element identifier name
Definition: ctlparse.c:114
snd_hctl_set_compare
int snd_hctl_set_compare(snd_hctl_t *hctl, snd_hctl_compare_t hsort)
Change HCTL compare function and reorder elements.
Definition: hcontrol.c:448
snd_ctl_card_info_clear
void snd_ctl_card_info_clear(snd_ctl_card_info_t *obj)
clear given snd_ctl_card_info_t object
Definition: control.c:1856
snd_ctl_elem_id_set_name
void snd_ctl_elem_id_set_name(snd_ctl_elem_id_t *obj, const char *val)
Set name part for a CTL element identifier.
Definition: control.c:1803
snd_ctl_poll_descriptors_count
int snd_ctl_poll_descriptors_count(snd_ctl_t *ctl)
get count of poll descriptors for CTL handle
Definition: control.c:204
snd_ctl_elem_list_copy
void snd_ctl_elem_list_copy(snd_ctl_elem_list_t *dst, const snd_ctl_elem_list_t *src)
copy one snd_ctl_elem_list_t to another
Definition: control.c:2058
snd_ctl_elem_info_get_step64
long long snd_ctl_elem_info_get_step64(const snd_ctl_elem_info_t *obj)
Get value step from a SND_CTL_ELEM_TYPE_INTEGER64 CTL element id/info.
Definition: control.c:2460
snd_hctl_elem_get_name
const char * snd_hctl_elem_get_name(const snd_hctl_elem_t *obj)
Get name part of CTL element identifier of a CTL element id/value.
Definition: hcontrol.c:964
snd_ctl_elem_info_set_device
void snd_ctl_elem_info_set_device(snd_ctl_elem_info_t *obj, unsigned int val)
Set device part of CTL element identifier of a CTL element id/info.
Definition: control.c:2690
snd_ctl_event_elem_get_index
unsigned int snd_ctl_event_elem_get_index(const snd_ctl_event_t *obj)
Get index part of CTL element identifier for an element related event.
Definition: control.c:1621
snd_ctl_elem_info_set_numid
void snd_ctl_elem_info_set_numid(snd_ctl_elem_info_t *obj, unsigned int val)
Set element numeric identifier of a CTL element id/info.
Definition: control.c:2668
snd_ctl_pcm_info
int snd_ctl_pcm_info(snd_ctl_t *ctl, snd_pcm_info_t *info)
Get info about a PCM device.
Definition: control.c:1063
snd_ctl_card_info_get_card
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:1877
snd_hctl_close
int snd_hctl_close(snd_hctl_t *hctl)
close HCTL handle
Definition: hcontrol.c:111
snd_ctl_elem_list_set_offset
void snd_ctl_elem_list_set_offset(snd_ctl_elem_list_t *obj, unsigned int val)
Set index of first wanted CTL element identifier in a CTL element identifiers list.
Definition: control.c:2069
snd_ctl_event_clear
void snd_ctl_event_clear(snd_ctl_event_t *obj)
clear given snd_ctl_event_t object
Definition: control.c:1985
snd_hctl_elem_get_subdevice
unsigned int snd_hctl_elem_get_subdevice(const snd_hctl_elem_t *obj)
Get subdevice part of CTL element identifier of a CTL element id/value.
Definition: hcontrol.c:953
snd_hctl_elem_info
int snd_hctl_elem_info(snd_hctl_elem_t *elem, snd_ctl_elem_info_t *info)
Get information for an HCTL element.
Definition: hcontrol.c:805
snd_ctl_elem_info
int snd_ctl_elem_info(snd_ctl_t *ctl, snd_ctl_elem_info_t *info)
Get CTL element information.
Definition: control.c:300
snd_async_handler_get_ctl
snd_ctl_t * snd_async_handler_get_ctl(snd_async_handler_t *handler)
Return CTL handle related to an async handler.
Definition: control.c:1236
snd_card_get_name
int snd_card_get_name(int card, char **name)
Obtain the card name.
Definition: cards.c:173
snd_ctl_elem_remove
int snd_ctl_elem_remove(snd_ctl_t *ctl, snd_ctl_elem_id_t *id)
Remove an user CTL element.
Definition: control.c:854
snd_ctl_elem_value_sizeof
size_t snd_ctl_elem_value_sizeof(void)
Get size of data structure for an element.
Definition: control.c:2733
snd_ctl_wait
int snd_ctl_wait(snd_ctl_t *ctl, int timeout)
Wait for a CTL to become ready (i.e. at least one event pending)
Definition: control.c:1163
SND_CTL_ELEM_IFACE_HWDEP
Definition: control.h:95
snd_ctl_elem_info_get_max64
long long snd_ctl_elem_info_get_max64(const snd_ctl_elem_info_t *obj)
Get maximum value from a SND_CTL_ELEM_TYPE_INTEGER64 CTL element id/info.
Definition: control.c:2448
snd_hctl_elem_get_interface
snd_ctl_elem_iface_t snd_hctl_elem_get_interface(const snd_hctl_elem_t *obj)
Get interface part of CTL element identifier of a CTL element id/value.
Definition: hcontrol.c:931
snd_ctl_elem_info_get_subdevice
unsigned int snd_ctl_elem_info_get_subdevice(const snd_ctl_elem_info_t *obj)
Get subdevice part of CTL element identifier of a CTL element id/info.
Definition: control.c:2624
snd_ctl_hwdep_info
int snd_ctl_hwdep_info(snd_ctl_t *ctl, snd_hwdep_info_t *info)
Get info about a hardware dependent device.
Definition: control.c:1039
snd_ctl_elem_value_get_boolean
int snd_ctl_elem_value_get_boolean(const snd_ctl_elem_value_t *obj, unsigned int idx)
Get value of a specified member from given data as an element of boolean type.
Definition: control.c:2958
snd_ctl_card_info_malloc
int snd_ctl_card_info_malloc(snd_ctl_card_info_t **ptr)
allocate an invalid snd_ctl_card_info_t using standard malloc
Definition: control.c:1834
snd_hctl_elem_get_numid
unsigned int snd_hctl_elem_get_numid(const snd_hctl_elem_t *obj)
Get element numeric identifier of a CTL element id/value.
Definition: hcontrol.c:920
snd_ctl_close
int snd_ctl_close(snd_ctl_t *ctl)
close CTL handle
Definition: control.c:132
snd_hctl_elem_set_callback_private
void snd_hctl_elem_set_callback_private(snd_hctl_elem_t *obj, void *val)
Set callback private value for an HCTL element.
Definition: hcontrol.c:997
snd_tlv_convert_from_dB
int snd_tlv_convert_from_dB(unsigned int *tlv, long rangemin, long rangemax, long db_gain, long *value, int xdir)
Convert from dB gain to the corresponding raw value.
Definition: tlv.c:289
SND_CTL_ELEM_TYPE_BYTES
Definition: control.h:82
snd_ctl_subscribe_events
int snd_ctl_subscribe_events(snd_ctl_t *ctl, int subscribe)
Ask to be informed about events (poll, snd_async_add_ctl_handler, snd_ctl_read)
Definition: control.c:262
snd_ctl_poll_descriptors_revents
int snd_ctl_poll_descriptors_revents(snd_ctl_t *ctl, struct pollfd *pfds, unsigned int nfds, unsigned short *revents)
get returned events from poll descriptors
Definition: control.c:244
snd_ctl_card_info_sizeof
size_t snd_ctl_card_info_sizeof(void)
get size of snd_ctl_card_info_t
Definition: control.c:1824
snd_ctl_elem_info_is_volatile
int snd_ctl_elem_info_is_volatile(const snd_ctl_elem_info_t *obj)
Get info about notification feasibility from a CTL element id/info.
Definition: control.c:2278
snd_ctl_elem_add_iec958
int snd_ctl_elem_add_iec958(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id)
Create and add a user-defined control element of IEC958 type.
Definition: control.c:835
snd_ctl_elem_list_free_space
void snd_ctl_elem_list_free_space(snd_ctl_elem_list_t *obj)
free previously allocated space for CTL element identifiers list
Definition: control.c:1525
snd_ctl_elem_info_get_name
const char * snd_ctl_elem_info_get_name(const snd_ctl_elem_info_t *obj)
Get name part of CTL element identifier of a CTL element id/info.
Definition: control.c:2635
snd_ctl_card_info_get_components
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:1943
snd_ctl_elem_value_set_integer
void snd_ctl_elem_value_set_integer(snd_ctl_elem_value_t *obj, unsigned int idx, long val)
Set value of a specified member to given data as an element of integer type.
Definition: control.c:3042
snd_ctl_elem_value_set_interface
void snd_ctl_elem_value_set_interface(snd_ctl_elem_value_t *obj, snd_ctl_elem_iface_t val)
Set interface part of element identifier to given data of an element.
Definition: control.c:2901
snd_ctl_elem_id_get_numid
unsigned int snd_ctl_elem_id_get_numid(const snd_ctl_elem_id_t *obj)
Get numeric identifier from a CTL element identifier.
Definition: control.c:1693
snd_ctl_elem_id_get_name
const char * snd_ctl_elem_id_get_name(const snd_ctl_elem_id_t *obj)
Get name part of a CTL element identifier.
Definition: control.c:1737
snd_hctl_poll_descriptors_count
int snd_hctl_poll_descriptors_count(snd_hctl_t *hctl)
get count of poll descriptors for HCTL handle
Definition: hcontrol.c:168
snd_tlv_convert_to_dB
int snd_tlv_convert_to_dB(unsigned int *tlv, long rangemin, long rangemax, long volume, long *db_gain)
Convert the given raw volume value to a dB gain.
Definition: tlv.c:200
snd_hctl_elem_get_id
void snd_hctl_elem_get_id(const snd_hctl_elem_t *obj, snd_ctl_elem_id_t *ptr)
Get CTL element identifier of a CTL element id/value.
Definition: hcontrol.c:909
snd_hctl_name
const char * snd_hctl_name(snd_hctl_t *hctl)
get identifier of HCTL handle
Definition: hcontrol.c:130
SND_CTL_TYPE_HW
Definition: control.h:195
snd_ctl_elem_list_free
void snd_ctl_elem_list_free(snd_ctl_elem_list_t *obj)
frees a previously allocated snd_ctl_elem_list_t
Definition: control.c:2039
snd_ctl_elem_info_set_subdevice
void snd_ctl_elem_info_set_subdevice(snd_ctl_elem_info_t *obj, unsigned int val)
Set subdevice part of CTL element identifier of a CTL element id/info.
Definition: control.c:2701
snd_tlv_parse_dB_info
int snd_tlv_parse_dB_info(unsigned int *tlv, unsigned int tlv_size, unsigned int **db_tlvp)
Parse TLV stream and retrieve dB information.
Definition: tlv.c:59
snd_ctl_card_info_get_longname
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:1921
snd_ctl_elem_info_malloc
int snd_ctl_elem_info_malloc(snd_ctl_elem_info_t **ptr)
allocate an invalid snd_ctl_elem_info_t using standard malloc
Definition: control.c:2202
snd_ctl_rawmidi_next_device
int snd_ctl_rawmidi_next_device(snd_ctl_t *ctl, int *device)
Get next RawMidi device number.
Definition: control.c:1087
snd_ctl_elem_info_t
struct _snd_ctl_elem_info snd_ctl_elem_info_t
Definition: control.h:63
snd_ctl_elem_value_copy
void snd_ctl_elem_value_copy(snd_ctl_elem_value_t *dst, const snd_ctl_elem_value_t *src)
Copy two data of elements.
Definition: control.c:2775
snd_ctl_elem_value_set_id
void snd_ctl_elem_value_set_id(snd_ctl_elem_value_t *obj, const snd_ctl_elem_id_t *ptr)
Set element identifier to given data of an element.
Definition: control.c:2879
snd_async_handler_t
struct _snd_async_handler snd_async_handler_t
Internal structure for an async notification client handler.
Definition: global.h:114
snd_sctl_remove
int snd_sctl_remove(snd_sctl_t *handle)
Remove (restore) previous values from control elements.
Definition: setup.c:181
snd_sctl_free
int snd_sctl_free(snd_sctl_t *handle)
Free setup control handle.
Definition: setup.c:644
snd_ctl_elem_list_malloc
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:2026
SND_CTL_ELEM_TYPE_INTEGER
Definition: control.h:78
SND_CTL_ELEM_IFACE_CARD
Definition: control.h:93
snd_ctl_elem_info_is_tlv_readable
int snd_ctl_elem_info_is_tlv_readable(const snd_ctl_elem_info_t *obj)
Get info about TLV readability from a CTL element id/info.
Definition: control.c:2333
snd_ctl_elem_value_malloc
int snd_ctl_elem_value_malloc(snd_ctl_elem_value_t **ptr)
Allocate an invalid snd_ctl_elem_value_t using standard malloc(3).
Definition: control.c:2743
snd_ctl_add_bytes_elem_set
int snd_ctl_add_bytes_elem_set(snd_ctl_t *ctl, snd_ctl_elem_info_t *info, unsigned int element_count, unsigned int member_count)
Create and add some user-defined control elements of bytes type.
Definition: control.c:702
snd_ctl_elem_list_get_interface
snd_ctl_elem_iface_t snd_ctl_elem_list_get_interface(const snd_ctl_elem_list_t *obj, unsigned int idx)
Get interface part of CTL element identifier for an entry of a CTL element identifiers list...
Definition: control.c:2129
snd_hctl_first_elem
snd_hctl_elem_t * snd_hctl_first_elem(snd_hctl_t *hctl)
get first element for an HCTL
Definition: hcontrol.c:498
snd_ctl_elem_info_is_writable
int snd_ctl_elem_info_is_writable(const snd_ctl_elem_info_t *obj)
Get info about writability from a CTL element id/info.
Definition: control.c:2267
snd_hctl_wait
int snd_hctl_wait(snd_hctl_t *hctl, int timeout)
Wait for a HCTL to become ready (i.e. at least one event pending)
Definition: hcontrol.c:675
snd_ctl_elem_value_get_numid
unsigned int snd_ctl_elem_value_get_numid(const snd_ctl_elem_value_t *obj)
Get element numeric identifier from given data of an element.
Definition: control.c:2811
snd_ctl_elem_info_sizeof
size_t snd_ctl_elem_info_sizeof(void)
get size of snd_ctl_elem_info_t
Definition: control.c:2192
snd_hctl_open
int snd_hctl_open(snd_hctl_t **hctl, const char *name, int mode)
Opens an HCTL.
Definition: hcontrol.c:70
snd_hctl_elem_set_callback
void snd_hctl_elem_set_callback(snd_hctl_elem_t *obj, snd_hctl_elem_callback_t val)
Set callback function for an HCTL element.
Definition: hcontrol.c:986
snd_ctl_elem_set_bytes
void snd_ctl_elem_set_bytes(snd_ctl_elem_value_t *obj, void *data, size_t size)
Set values to given data as an element of bytes type.
Definition: control.c:3097
snd_ctl_elem_id_get_index
unsigned int snd_ctl_elem_id_get_index(const snd_ctl_elem_id_t *obj)
Get index part of a CTL element identifier.
Definition: control.c:1748
snd_async_add_ctl_handler
int snd_async_add_ctl_handler(snd_async_handler_t **handler, snd_ctl_t *ctl, snd_async_callback_t callback, void *private_data)
Add an async handler for a CTL.
Definition: control.c:1206
snd_ctl_get_power_state
int snd_ctl_get_power_state(snd_ctl_t *ctl, unsigned int *state)
Get actual Power State.
Definition: control.c:1137
snd_hctl_handle_events
int snd_hctl_handle_events(snd_hctl_t *hctl)
Handle pending HCTL events invoking callbacks.
Definition: hcontrol.c:779
snd_ctl_elem_value_get_name
const char * snd_ctl_elem_value_get_name(const snd_ctl_elem_value_t *obj)
Get name part of element identifier from given data of an element.
Definition: control.c:2857
snd_ctl_open_fallback
int snd_ctl_open_fallback(snd_ctl_t **ctl, snd_config_t *root, const char *name, const char *orig_name, int mode)
Opens a fallback CTL.
Definition: control.c:1426
snd_ctl_rawmidi_prefer_subdevice
int snd_ctl_rawmidi_prefer_subdevice(snd_ctl_t *ctl, int subdev)
Set preferred RawMidi subdevice number of successive RawMidi open.
Definition: control.c:1111
snd_ctl_set_power_state
int snd_ctl_set_power_state(snd_ctl_t *ctl, unsigned int state)
Set Power State to given SND_CTL_POWER_* value and do the power management.
Definition: control.c:1123
snd_hctl_elem_tlv_write
int snd_hctl_elem_tlv_write(snd_hctl_elem_t *elem, const unsigned int *tlv)
Set TLV value for an HCTL element.
Definition: hcontrol.c:869
snd_ctl_elem_list_get_id
void snd_ctl_elem_list_get_id(const snd_ctl_elem_list_t *obj, unsigned int idx, snd_ctl_elem_id_t *ptr)
Get CTL element identifier for an entry of a CTL element identifiers list.
Definition: control.c:2103
snd_hctl_elem_get_hctl
snd_hctl_t * snd_hctl_elem_get_hctl(snd_hctl_elem_t *elem)
Get HCTL handle for an HCTL element.
Definition: hcontrol.c:898
snd_ctl_event_t
struct _snd_ctl_event snd_ctl_event_t
Definition: control.h:69
snd_sctl_build
int snd_sctl_build(snd_sctl_t **ctl, snd_ctl_t *handle, snd_config_t *config, snd_config_t *private_data, int mode)
Build setup control handle.
Definition: setup.c:603
snd_ctl_elem_info_is_inactive
int snd_ctl_elem_info_is_inactive(const snd_ctl_elem_info_t *obj)
Get info about status from a CTL element id/info.
Definition: control.c:2289
snd_ctl_event_elem_get_subdevice
unsigned int snd_ctl_event_elem_get_subdevice(const snd_ctl_event_t *obj)
Get subdevice part of CTL element identifier for an element related event.
Definition: control.c:1597
snd_ctl_name
const char * snd_ctl_name(snd_ctl_t *ctl)
get identifier of CTL handle
Definition: control.c:105
snd_ctl_event_free
void snd_ctl_event_free(snd_ctl_event_t *obj)
frees a previously allocated snd_ctl_event_t
Definition: control.c:1976
snd_ctl_elem_read
int snd_ctl_elem_read(snd_ctl_t *ctl, snd_ctl_elem_value_t *data)
Get CTL element value.
Definition: control.c:866
snd_ctl_event_elem_get_device
unsigned int snd_ctl_event_elem_get_device(const snd_ctl_event_t *obj)
Get device part of CTL element identifier for an element related event.
Definition: control.c:1585
snd_hctl_t
struct _snd_hctl snd_hctl_t
Definition: control.h:523
snd_ctl_elem_add_integer
int snd_ctl_elem_add_integer(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id, unsigned int count, long imin, long imax, long istep)
Create and add an user-defined control element of integer type.
Definition: control.c:729
snd_card_get_index
int snd_card_get_index(const char *name)
Convert card string to an integer value.
Definition: cards.c:125
snd_ctl_card_info_get_name
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:1910
snd_config_t
struct _snd_config snd_config_t
Internal structure for a configuration node object.
Definition: conf.h:69
SND_CTL_ELEM_IFACE_MIXER
Definition: control.h:97
snd_hctl_elem_t
struct _snd_hctl_elem snd_hctl_elem_t
Definition: control.h:520
SND_CTL_TYPE_SHM
Definition: control.h:197
snd_ctl_elem_list_get_subdevice
unsigned int snd_ctl_elem_list_get_subdevice(const snd_ctl_elem_list_t *obj, unsigned int idx)
Get subdevice part of CTL element identifier for an entry of a CTL element identifiers list...
Definition: control.c:2155
snd_ctl_elem_value_set_integer64
void snd_ctl_elem_value_set_integer64(snd_ctl_elem_value_t *obj, unsigned int idx, long long val)
Set value of a specified member to given data as an element of integer64 type.
Definition: control.c:3056
snd_ctl_elem_list_get_index
unsigned int snd_ctl_elem_list_get_index(const snd_ctl_elem_list_t *obj, unsigned int idx)
Get index part of CTL element identifier for an entry of a CTL element identifiers list...
Definition: control.c:2181
snd_ctl_elem_id_set_interface
void snd_ctl_elem_id_set_interface(snd_ctl_elem_id_t *obj, snd_ctl_elem_iface_t val)
Set interface part for a CTL element identifier.
Definition: control.c:1770
snd_hctl_elem_next
snd_hctl_elem_t * snd_hctl_elem_next(snd_hctl_elem_t *elem)
get next HCTL element
Definition: hcontrol.c:524
snd_ctl_elem_add_integer64
int snd_ctl_elem_add_integer64(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id, unsigned int count, long long imin, long long imax, long long istep)
Create and add an user-defined control element of integer64 type.
Definition: control.c:750
snd_ctl_elem_add_enumerated
int snd_ctl_elem_add_enumerated(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id, unsigned int count, unsigned int items, const char *const names[])
Create and add a user-defined control element of enumerated type.
Definition: control.c:792
snd_ctl_elem_info_set_name
void snd_ctl_elem_info_set_name(snd_ctl_elem_info_t *obj, const char *val)
Set name part of CTL element identifier of a CTL element id/info.
Definition: control.c:2712
snd_ctl_elem_info_get_count
unsigned int snd_ctl_elem_info_get_count(const snd_ctl_elem_info_t *obj)
Get number of value entries from a CTL element id/info.
Definition: control.c:2389
snd_ctl_type
snd_ctl_type_t snd_ctl_type(snd_ctl_t *ctl)
get type of CTL handle
Definition: control.c:118
snd_sctl_install
int snd_sctl_install(snd_sctl_t *handle)
Install given values to control elements.
Definition: setup.c:83
snd_ctl_elem_list_alloc_space
int snd_ctl_elem_list_alloc_space(snd_ctl_elem_list_t *obj, unsigned int entries)
allocate space for CTL element identifiers list
Definition: control.c:1509
snd_ctl_elem_info_get_index
unsigned int snd_ctl_elem_info_get_index(const snd_ctl_elem_info_t *obj)
Get index part of CTL element identifier of a CTL element id/info.
Definition: control.c:2646
snd_ctl_elem_type_name
const char * snd_ctl_elem_type_name(snd_ctl_elem_type_t type)
get name of a CTL element type
Definition: control.c:1475
snd_ctl_elem_id_malloc
int snd_ctl_elem_id_malloc(snd_ctl_elem_id_t **ptr)
allocate an invalid snd_ctl_elem_id_t using standard malloc
Definition: control.c:1650
snd_ctl_event_type_t
snd_ctl_event_type_t
Definition: control.h:110
snd_ctl_open_lconf
int snd_ctl_open_lconf(snd_ctl_t **ctl, const char *name, int mode, snd_config_t *lconf)
Opens a CTL using local configuration.
Definition: control.c:1410
snd_hctl_elem_prev
snd_hctl_elem_t * snd_hctl_elem_prev(snd_hctl_elem_t *elem)
get previous HCTL element
Definition: hcontrol.c:537
snd_hctl_ctl
snd_ctl_t * snd_hctl_ctl(snd_hctl_t *hctl)
Get a ctl handle associated to the given hctl handle.
Definition: hcontrol.c:724
snd_ctl_elem_id_set_device
void snd_ctl_elem_id_set_device(snd_ctl_elem_id_t *obj, unsigned int val)
Set device part for a CTL element identifier.
Definition: control.c:1781
snd_ctl_card_info_get_driver
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:1899
snd_sctl_t
struct _snd_sctl snd_sctl_t
Definition: control.h:220
SND_CTL_ELEM_TYPE_INTEGER64
Definition: control.h:86
ptr
void * ptr
Definition: seq_event.h:199
snd_card_get_longname
int snd_card_get_longname(int card, char **name)
Obtain the card long name.
Definition: cards.c:203
snd_hctl_find_elem
snd_hctl_elem_t * snd_hctl_find_elem(snd_hctl_t *hctl, const snd_ctl_elem_id_t *id)
Search an HCTL element.
Definition: hcontrol.c:551
snd_ctl_elem_list_clear
void snd_ctl_elem_list_clear(snd_ctl_elem_list_t *obj)
clear given snd_ctl_elem_list_t object
Definition: control.c:2048
snd_ctl_ascii_value_parse
int snd_ctl_ascii_value_parse(snd_ctl_t *handle, snd_ctl_elem_value_t *dst, snd_ctl_elem_info_t *info, const char *value)
parse ASCII string as CTL element value
Definition: ctlparse.c:309
snd_ctl_elem_info_set_interface
void snd_ctl_elem_info_set_interface(snd_ctl_elem_info_t *obj, snd_ctl_elem_iface_t val)
Set interface part of CTL element identifier of a CTL element id/info.
Definition: control.c:2679
snd_ctl_elem_value_set_device
void snd_ctl_elem_value_set_device(snd_ctl_elem_value_t *obj, unsigned int val)
Set device part of element identifier to given data of an element.
Definition: control.c:2912
snd_ctl_card_info_get_id
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:1888
snd_ctl_elem_value_get_integer64
long long snd_ctl_elem_value_get_integer64(const snd_ctl_elem_value_t *obj, unsigned int idx)
Get value of a specified member from given data as an element of integer64 type.
Definition: control.c:2986
snd_ctl_elem_write
int snd_ctl_elem_write(snd_ctl_t *ctl, snd_ctl_elem_value_t *data)
Set CTL element value.
Definition: control.c:880
SND_CTL_ELEM_IFACE_RAWMIDI
Definition: control.h:101
snd_ctl_ascii_elem_id_parse
int snd_ctl_ascii_elem_id_parse(snd_ctl_elem_id_t *dst, const char *str)
parse ASCII string as CTL element identifier
Definition: ctlparse.c:264
snd_ctl_elem_value_set_enumerated
void snd_ctl_elem_value_set_enumerated(snd_ctl_elem_value_t *obj, unsigned int idx, unsigned int val)
Set value of a specified member to given data as an element of enumerated type.
Definition: control.c:3070
snd_ctl_elem_info_copy
void snd_ctl_elem_info_copy(snd_ctl_elem_info_t *dst, const snd_ctl_elem_info_t *src)
copy one snd_ctl_elem_info_t to another
Definition: control.c:2234
snd_ctl_elem_value_get_byte
unsigned char snd_ctl_elem_value_get_byte(const snd_ctl_elem_value_t *obj, unsigned int idx)
Get value of a specified member from given data as an element of bytes type.
Definition: control.c:3014
snd_ctl_elem_id_sizeof
size_t snd_ctl_elem_id_sizeof(void)
get size of snd_ctl_elem_id_t
Definition: control.c:1640
snd_ctl_elem_info_free
void snd_ctl_elem_info_free(snd_ctl_elem_info_t *obj)
frees a previously allocated snd_ctl_elem_info_t
Definition: control.c:2215
snd_device_name_get_hint
char * snd_device_name_get_hint(const void *hint, const char *id)
Extract a value from a hint.
Definition: namehint.c:679
snd_ctl_elem_value_get_iec958
void snd_ctl_elem_value_get_iec958(const snd_ctl_elem_value_t *obj, snd_aes_iec958_t *ptr)
Get value from given data to given pointer as an element of IEC958 type.
Definition: control.c:3121
SND_CTL_ELEM_TYPE_NONE
Definition: control.h:74
snd_ctl_elem_tlv_read
int snd_ctl_elem_tlv_read(snd_ctl_t *ctl, const snd_ctl_elem_id_t *id, unsigned int *tlv, unsigned int tlv_size)
Read structured data from an element set to given buffer.
Definition: control.c:929
snd_aes_iec958_t::pad
unsigned char pad
Definition: control.h:49
snd_hctl_poll_descriptors
int snd_hctl_poll_descriptors(snd_hctl_t *hctl, struct pollfd *pfds, unsigned int space)
get poll descriptors
Definition: hcontrol.c:181
snd_ctl_elem_id_free
void snd_ctl_elem_id_free(snd_ctl_elem_id_t *obj)
frees a previously allocated snd_ctl_elem_id_t
Definition: control.c:1663
snd_ctl_elem_info_is_user
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:2322