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mixer.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_MIXER_H
29 #define __ALSA_MIXER_H
30 
31 #ifdef __cplusplus
32 extern "C" {
33 #endif
34 
42 typedef struct _snd_mixer snd_mixer_t;
44 typedef struct _snd_mixer_class snd_mixer_class_t;
46 typedef struct _snd_mixer_elem snd_mixer_elem_t;
47 
55 typedef int (*snd_mixer_callback_t)(snd_mixer_t *ctl,
56  unsigned int mask,
57  snd_mixer_elem_t *elem);
58 
66  unsigned int mask);
67 
74 typedef int (*snd_mixer_compare_t)(const snd_mixer_elem_t *e1,
75  const snd_mixer_elem_t *e2);
76 
85 typedef int (*snd_mixer_event_t)(snd_mixer_class_t *class_, unsigned int mask,
86  snd_hctl_elem_t *helem, snd_mixer_elem_t *melem);
87 
88 
90 typedef enum _snd_mixer_elem_type {
91  /* Simple mixer elements */
92  SND_MIXER_ELEM_SIMPLE,
93  SND_MIXER_ELEM_LAST = SND_MIXER_ELEM_SIMPLE
95 
96 int snd_mixer_open(snd_mixer_t **mixer, int mode);
97 int snd_mixer_close(snd_mixer_t *mixer);
101 int snd_mixer_attach(snd_mixer_t *mixer, const char *name);
102 int snd_mixer_attach_hctl(snd_mixer_t *mixer, snd_hctl_t *hctl);
103 int snd_mixer_detach(snd_mixer_t *mixer, const char *name);
104 int snd_mixer_detach_hctl(snd_mixer_t *mixer, snd_hctl_t *hctl);
105 int snd_mixer_get_hctl(snd_mixer_t *mixer, const char *name, snd_hctl_t **hctl);
107 int snd_mixer_poll_descriptors(snd_mixer_t *mixer, struct pollfd *pfds, unsigned int space);
108 int snd_mixer_poll_descriptors_revents(snd_mixer_t *mixer, struct pollfd *pfds, unsigned int nfds, unsigned short *revents);
109 int snd_mixer_load(snd_mixer_t *mixer);
110 void snd_mixer_free(snd_mixer_t *mixer);
111 int snd_mixer_wait(snd_mixer_t *mixer, int timeout);
115 void snd_mixer_set_callback_private(snd_mixer_t *obj, void * val);
116 unsigned int snd_mixer_get_count(const snd_mixer_t *obj);
118 
125 
129  int compare_weight,
130  void *private_data,
131  void (*private_free)(snd_mixer_elem_t *elem));
140 void *snd_mixer_elem_get_private(const snd_mixer_elem_t *melem);
141 
142 size_t snd_mixer_class_sizeof(void);
147 #define snd_mixer_class_alloca(ptr) __snd_alloca(ptr, snd_mixer_class)
156 int snd_mixer_class_set_private(snd_mixer_class_t *class_, void *private_data);
157 int snd_mixer_class_set_private_free(snd_mixer_class_t *class_, void (*private_free)(snd_mixer_class_t *));
159 
167 /* Simple mixer elements API */
168 
170 typedef enum _snd_mixer_selem_channel_id {
191  SND_MIXER_SCHN_LAST = 31,
195 
202 };
203 
207  int ver;
211  const char *device;
216 };
217 
219 typedef struct _snd_mixer_selem_id snd_mixer_selem_id_t;
220 
222 
224  struct snd_mixer_selem_regopt *options,
225  snd_mixer_class_t **classp);
228 const char *snd_mixer_selem_get_name(snd_mixer_elem_t *elem);
229 unsigned int snd_mixer_selem_get_index(snd_mixer_elem_t *elem);
231  const snd_mixer_selem_id_t *id);
232 
250 
251 int snd_mixer_selem_ask_playback_vol_dB(snd_mixer_elem_t *elem, long value, long *dBvalue);
252 int snd_mixer_selem_ask_capture_vol_dB(snd_mixer_elem_t *elem, long value, long *dBvalue);
253 int snd_mixer_selem_ask_playback_dB_vol(snd_mixer_elem_t *elem, long dBvalue, int dir, long *value);
254 int snd_mixer_selem_ask_capture_dB_vol(snd_mixer_elem_t *elem, long dBvalue, int dir, long *value);
263 int snd_mixer_selem_set_playback_dB(snd_mixer_elem_t *elem, snd_mixer_selem_channel_id_t channel, long value, int dir);
264 int snd_mixer_selem_set_capture_dB(snd_mixer_elem_t *elem, snd_mixer_selem_channel_id_t channel, long value, int dir);
267 int snd_mixer_selem_set_playback_dB_all(snd_mixer_elem_t *elem, long value, int dir);
268 int snd_mixer_selem_set_capture_dB_all(snd_mixer_elem_t *elem, long value, int dir);
274  long *min, long *max);
276  long *min, long *max);
278  long min, long max);
280  long *min, long *max);
282  long *min, long *max);
284  long min, long max);
285 
290 int snd_mixer_selem_get_enum_item_name(snd_mixer_elem_t *elem, unsigned int idx, size_t maxlen, char *str);
291 int snd_mixer_selem_get_enum_item(snd_mixer_elem_t *elem, snd_mixer_selem_channel_id_t channel, unsigned int *idxp);
293 
294 size_t snd_mixer_selem_id_sizeof(void);
299 #define snd_mixer_selem_id_alloca(ptr) __snd_alloca(ptr, snd_mixer_selem_id)
303 const char *snd_mixer_selem_id_get_name(const snd_mixer_selem_id_t *obj);
304 unsigned int snd_mixer_selem_id_get_index(const snd_mixer_selem_id_t *obj);
305 void snd_mixer_selem_id_set_name(snd_mixer_selem_id_t *obj, const char *val);
306 void snd_mixer_selem_id_set_index(snd_mixer_selem_id_t *obj, unsigned int val);
307 
312 #ifdef __cplusplus
313 }
314 #endif
315 
316 #endif /* __ALSA_MIXER_H */
317 
int snd_mixer_elem_remove(snd_mixer_elem_t *elem)
Remove a mixer element.
Definition: mixer.c:443
void snd_mixer_selem_id_free(snd_mixer_selem_id_t *obj)
frees a previously allocated snd_mixer_selem_id_t
Definition: simple.c:995
const char * device
Definition: mixer.h:211
Definition: mixer.h:188
void * snd_mixer_class_get_private(const snd_mixer_class_t *class_)
Get mixer private data associated to given mixer class.
Definition: mixer.c:1017
snd_pcm_t * capture_pcm
Definition: mixer.h:215
int snd_mixer_close(snd_mixer_t *mixer)
Close a mixer and free all related resources.
Definition: mixer.c:601
int snd_mixer_poll_descriptors_revents(snd_mixer_t *mixer, struct pollfd *pfds, unsigned int nfds, unsigned short *revents)
get returned events from poll descriptors
Definition: mixer.c:740
int snd_mixer_selem_get_playback_dB_range(snd_mixer_elem_t *elem, long *min, long *max)
Get range in dB for playback volume of a mixer simple element.
Definition: simple.c:294
void snd_mixer_class_copy(snd_mixer_class_t *dst, const snd_mixer_class_t *src)
copy one snd_mixer_class_t to another
Definition: mixer.c:984
unsigned int snd_mixer_selem_id_get_index(const snd_mixer_selem_id_t *obj)
Get index part of a mixer simple element identifier.
Definition: simple.c:1027
int snd_mixer_attach_hctl(snd_mixer_t *mixer, snd_hctl_t *hctl)
Attach an HCTL to an opened mixer.
Definition: mixer.c:220
int snd_mixer_elem_value(snd_mixer_elem_t *elem)
Mixer element values is changed.
Definition: mixer.c:503
snd_mixer_elem_t * snd_mixer_elem_next(snd_mixer_elem_t *elem)
get next mixer element
Definition: mixer.c:814
int snd_mixer_selem_is_playback_mono(snd_mixer_elem_t *elem)
Get info about channels of playback stream of a mixer simple element.
Definition: simple.c:256
int snd_mixer_selem_has_common_volume(snd_mixer_elem_t *elem)
Return true if mixer simple element has only one volume control for both playback and capture...
Definition: simple.c:197
struct _snd_mixer_class snd_mixer_class_t
Definition: mixer.h:44
const char * snd_mixer_selem_get_name(snd_mixer_elem_t *elem)
Get name part of mixer simple element identifier.
Definition: simple.c:171
int snd_mixer_selem_id_malloc(snd_mixer_selem_id_t **ptr)
allocate an invalid snd_mixer_selem_id_t using standard malloc
Definition: simple.c:982
void snd_mixer_elem_set_callback_private(snd_mixer_elem_t *obj, void *val)
Set callback private value for a mixer element.
Definition: mixer.c:916
int snd_mixer_selem_is_enum_playback(snd_mixer_elem_t *elem)
Return true if mixer simple enumerated element belongs to the playback direction. ...
Definition: simple.c:890
int snd_mixer_selem_set_playback_volume_range(snd_mixer_elem_t *elem, long min, long max)
Set range for playback volume of a mixer simple element.
Definition: simple.c:308
Definition: mixer.h:172
struct _snd_mixer_elem snd_mixer_elem_t
Definition: mixer.h:46
int snd_mixer_selem_get_playback_switch(snd_mixer_elem_t *elem, snd_mixer_selem_channel_id_t channel, int *value)
Return value of playback switch control of a mixer simple element.
Definition: simple.c:431
int snd_mixer_selem_set_enum_item(snd_mixer_elem_t *elem, snd_mixer_selem_channel_id_t channel, unsigned int idx)
set the current selected enumerated item for the given mixer simple element
Definition: simple.c:959
void snd_mixer_selem_id_set_index(snd_mixer_selem_id_t *obj, unsigned int val)
Set index part of a mixer simple element identifier.
Definition: simple.c:1050
int snd_mixer_handle_events(snd_mixer_t *mixer)
Handle pending mixer events invoking callbacks.
Definition: mixer.c:840
int snd_mixer_class_set_private(snd_mixer_class_t *class_, void *private_data)
Set mixer private data to given mixer class.
Definition: mixer.c:1054
int snd_mixer_selem_get_playback_dB(snd_mixer_elem_t *elem, snd_mixer_selem_channel_id_t channel, long *value)
Return value of playback volume in dB control of a mixer simple element.
Definition: simple.c:411
int snd_mixer_selem_set_capture_switch(snd_mixer_elem_t *elem, snd_mixer_selem_channel_id_t channel, int value)
Set value of capture switch control of a mixer simple element.
Definition: simple.c:844
int snd_mixer_selem_set_playback_dB(snd_mixer_elem_t *elem, snd_mixer_selem_channel_id_t channel, long value, int dir)
Set value in dB of playback volume control of a mixer simple element.
Definition: simple.c:460
void * snd_mixer_get_callback_private(const snd_mixer_t *obj)
Get callback private value for a mixer.
Definition: mixer.c:883
snd_mixer_t * snd_mixer_class_get_mixer(const snd_mixer_class_t *class_)
Get a mixer associated to given mixer class.
Definition: mixer.c:995
int snd_mixer_selem_has_capture_volume(snd_mixer_elem_t *elem)
Return info about capture volume control of a mixer simple element.
Definition: simple.c:625
int snd_mixer_selem_get_enum_items(snd_mixer_elem_t *elem)
Return the number of enumerated items of the given mixer simple element.
Definition: simple.c:912
void * snd_mixer_elem_get_private(const snd_mixer_elem_t *melem)
Get private data associated to give mixer element.
Definition: mixer.c:357
int snd_mixer_selem_get_enum_item_name(snd_mixer_elem_t *elem, unsigned int idx, size_t maxlen, char *str)
get the enumerated item string for the given mixer simple element
Definition: simple.c:927
int snd_mixer_selem_is_capture_mono(snd_mixer_elem_t *elem)
Get info about channels of capture stream of a mixer simple element.
Definition: simple.c:557
snd_mixer_event_t snd_mixer_class_get_event(const snd_mixer_class_t *class_)
Get mixer event callback associated to given mixer class.
Definition: mixer.c:1006
int snd_mixer_selem_is_enumerated(snd_mixer_elem_t *elem)
Return true if mixer simple element is an enumerated control.
Definition: simple.c:879
void snd_mixer_free(snd_mixer_t *mixer)
Unload all mixer elements and free all related resources.
Definition: mixer.c:586
int snd_mixer_selem_set_playback_volume(snd_mixer_elem_t *elem, snd_mixer_selem_channel_id_t channel, long value)
Set value of playback volume control of a mixer simple element.
Definition: simple.c:445
int snd_mixer_poll_descriptors(snd_mixer_t *mixer, struct pollfd *pfds, unsigned int space)
get poll descriptors
Definition: mixer.c:710
int(* snd_mixer_event_t)(snd_mixer_class_t *class_, unsigned int mask, snd_hctl_elem_t *helem, snd_mixer_elem_t *melem)
Event callback for the mixer class.
Definition: mixer.h:85
snd_mixer_selem_channel_id_t
Definition: mixer.h:170
Definition: mixer.h:190
int snd_mixer_selem_has_capture_volume_joined(snd_mixer_elem_t *elem)
Return info about capture volume control of a mixer simple element.
Definition: simple.c:636
int snd_mixer_selem_ask_capture_dB_vol(snd_mixer_elem_t *elem, long dBvalue, int dir, long *value)
Return corresponding integer capture volume for given dB value for a mixer simple element...
Definition: simple.c:712
int snd_mixer_selem_has_capture_channel(snd_mixer_elem_t *obj, snd_mixer_selem_channel_id_t channel)
Get info about channels of capture stream of a mixer simple element.
Definition: simple.c:570
void snd_mixer_selem_id_set_name(snd_mixer_selem_id_t *obj, const char *val)
Set name part of a mixer simple element identifier.
Definition: simple.c:1038
snd_mixer_elem_t * snd_mixer_elem_prev(snd_mixer_elem_t *elem)
get previous mixer element
Definition: mixer.c:827
int snd_mixer_class_unregister(snd_mixer_class_t *clss)
Unregister mixer element class and remove all its elements.
Definition: mixer.c:546
int snd_mixer_selem_set_capture_volume_all(snd_mixer_elem_t *elem, long value)
Set value of capture volume control for all channels of a mixer simple element.
Definition: simple.c:796
int snd_mixer_class_set_event(snd_mixer_class_t *class_, snd_mixer_event_t event)
Set mixer event callback to given mixer class.
Definition: mixer.c:1041
snd_mixer_elem_type_t snd_mixer_elem_get_type(const snd_mixer_elem_t *obj)
Get type for a mixer element.
Definition: mixer.c:938
Definition: mixer.h:180
size_t snd_mixer_selem_id_sizeof(void)
get size of snd_mixer_selem_id_t
Definition: simple.c:972
snd_mixer_selem_regopt_abstract
Definition: mixer.h:197
snd_mixer_elem_type_t
Definition: mixer.h:90
int(* snd_mixer_compare_t)(const snd_mixer_elem_t *e1, const snd_mixer_elem_t *e2)
Compare function for sorting mixer elements.
Definition: mixer.h:74
int snd_mixer_elem_info(snd_mixer_elem_t *elem)
Mixer element informations are changed.
Definition: mixer.c:491
int snd_mixer_selem_has_capture_switch(snd_mixer_elem_t *elem)
Return info about capture switch control existence of a mixer simple element.
Definition: simple.c:647
int snd_mixer_selem_get_capture_group(snd_mixer_elem_t *elem)
Return info about capture switch control of a mixer simple element.
Definition: simple.c:680
size_t snd_mixer_class_sizeof(void)
get size of snd_mixer_class_t
Definition: mixer.c:949
int snd_mixer_selem_get_enum_item(snd_mixer_elem_t *elem, snd_mixer_selem_channel_id_t channel, unsigned int *idxp)
get the current selected enumerated item for the given mixer simple element
Definition: simple.c:943
int snd_mixer_class_set_compare(snd_mixer_class_t *class_, snd_mixer_compare_t compare)
Set mixer compare callback to given mixer class.
Definition: mixer.c:1080
int snd_mixer_class_register(snd_mixer_class_t *class_, snd_mixer_t *mixer)
Register mixer element class.
Definition: mixer.c:516
void snd_mixer_selem_id_copy(snd_mixer_selem_id_t *dst, const snd_mixer_selem_id_t *src)
copy one snd_mixer_selem_id_t to another
Definition: simple.c:1005
int snd_mixer_selem_has_playback_switch_joined(snd_mixer_elem_t *elem)
Return info about playback switch control of a mixer simple element.
Definition: simple.c:355
int snd_mixer_elem_add(snd_mixer_elem_t *elem, snd_mixer_class_t *class_)
Add an element for a registered mixer element class.
Definition: mixer.c:399
Definition: mixer.h:182
Definition: mixer.h:205
int snd_mixer_selem_ask_capture_vol_dB(snd_mixer_elem_t *elem, long value, long *dBvalue)
Return corresponding dB value to an integer capture volume for a mixer simple element.
Definition: simple.c:697
unsigned int snd_mixer_selem_get_index(snd_mixer_elem_t *elem)
Get index part of mixer simple element identifier.
Definition: simple.c:184
int snd_mixer_selem_set_playback_volume_all(snd_mixer_elem_t *elem, long value)
Set value of playback volume control for all channels of a mixer simple element.
Definition: simple.c:473
int snd_mixer_selem_ask_playback_dB_vol(snd_mixer_elem_t *elem, long dBvalue, int dir, long *value)
Return corresponding integer playback volume for given dB value for a mixer simple element...
Definition: simple.c:383
int snd_mixer_selem_get_capture_switch(snd_mixer_elem_t *elem, snd_mixer_selem_channel_id_t channel, int *value)
Return value of capture switch control of a mixer simple element.
Definition: simple.c:754
int snd_mixer_poll_descriptors_count(snd_mixer_t *mixer)
get count of poll descriptors for mixer handle
Definition: mixer.c:686
Definition: mixer.h:186
void snd_mixer_elem_free(snd_mixer_elem_t *elem)
Free a mixer element.
Definition: mixer.c:477
snd_mixer_compare_t snd_mixer_class_get_compare(const snd_mixer_class_t *class_)
Get mixer compare callback associated to given mixer class.
Definition: mixer.c:1029
snd_mixer_elem_t * snd_mixer_last_elem(snd_mixer_t *mixer)
get last element for a mixer
Definition: mixer.c:801
int snd_mixer_selem_register(snd_mixer_t *mixer, struct snd_mixer_selem_regopt *options, snd_mixer_class_t **classp)
Register mixer simple element class.
Definition: simple.c:50
int snd_mixer_selem_get_playback_volume_range(snd_mixer_elem_t *elem, long *min, long *max)
Get range for playback volume of a mixer simple element.
Definition: simple.c:280
int snd_mixer_class_malloc(snd_mixer_class_t **ptr)
allocate an invalid snd_mixer_class_t using standard malloc
Definition: mixer.c:959
int snd_mixer_selem_is_enum_capture(snd_mixer_elem_t *elem)
Return true if mixer simple enumerated element belongs to the capture direction.
Definition: simple.c:901
int snd_mixer_elem_attach(snd_mixer_elem_t *melem, snd_hctl_elem_t *helem)
Attach an HCTL element to a mixer element.
Definition: mixer.c:91
int snd_mixer_selem_set_playback_switch(snd_mixer_elem_t *elem, snd_mixer_selem_channel_id_t channel, int value)
Set value of playback switch control of a mixer simple element.
Definition: simple.c:521
int snd_mixer_selem_get_capture_dB_range(snd_mixer_elem_t *elem, long *min, long *max)
Get range in dB for capture volume of a mixer simple element.
Definition: simple.c:597
int snd_mixer_detach_hctl(snd_mixer_t *mixer, snd_hctl_t *hctl)
Detach a previously attached HCTL to an opened mixer freeing all related resources.
Definition: mixer.c:274
int snd_mixer_elem_empty(snd_mixer_elem_t *melem)
Return true if a mixer element does not contain any HCTL elements.
Definition: mixer.c:129
int ver
Definition: mixer.h:207
unsigned int snd_mixer_get_count(const snd_mixer_t *obj)
Get elements count for a mixer.
Definition: mixer.c:894
int snd_mixer_selem_has_capture_switch_joined(snd_mixer_elem_t *elem)
Return info about capture switch control of a mixer simple element.
Definition: simple.c:658
int snd_mixer_open(snd_mixer_t **mixer, int mode)
Opens an empty mixer.
Definition: mixer.c:68
int snd_mixer_selem_ask_playback_vol_dB(snd_mixer_elem_t *elem, long value, long *dBvalue)
Return corresponding dB value to an integer playback volume for a mixer simple element.
Definition: simple.c:368
Definition: mixer.h:184
void snd_mixer_class_free(snd_mixer_class_t *obj)
frees a previously allocated snd_mixer_class_t
Definition: mixer.c:972
int snd_mixer_selem_set_playback_dB_all(snd_mixer_elem_t *elem, long value, int dir)
Set value in dB of playback volume control for all channels of a mixer simple element.
Definition: simple.c:497
void * snd_mixer_elem_get_callback_private(const snd_mixer_elem_t *obj)
Get callback private value for a mixer element.
Definition: mixer.c:927
Definition: mixer.h:193
Definition: mixer.h:199
const char * snd_mixer_selem_id_get_name(const snd_mixer_selem_id_t *obj)
Get name part of a mixer simple element identifier.
Definition: simple.c:1016
int snd_mixer_selem_has_playback_volume_joined(snd_mixer_elem_t *elem)
Return info about playback volume control of a mixer simple element.
Definition: simple.c:333
void snd_mixer_set_callback_private(snd_mixer_t *obj, void *val)
Set callback private value for a mixer.
Definition: mixer.c:872
snd_pcm_t * playback_pcm
Definition: mixer.h:213
int snd_mixer_selem_get_capture_dB(snd_mixer_elem_t *elem, snd_mixer_selem_channel_id_t channel, long *value)
Return value of capture volume in dB control of a mixer simple element.
Definition: simple.c:740
struct _snd_mixer_selem_id snd_mixer_selem_id_t
Definition: mixer.h:219
void snd_mixer_set_callback(snd_mixer_t *obj, snd_mixer_callback_t val)
Set callback function for a mixer.
Definition: mixer.c:861
int snd_mixer_selem_get_capture_volume_range(snd_mixer_elem_t *elem, long *min, long *max)
Get range for capture volume of a mixer simple element.
Definition: simple.c:583
int snd_mixer_selem_set_capture_volume_range(snd_mixer_elem_t *elem, long min, long max)
Set range for capture volume of a mixer simple element.
Definition: simple.c:611
int snd_mixer_load(snd_mixer_t *mixer)
Load a mixer elements.
Definition: mixer.c:568
int snd_mixer_elem_new(snd_mixer_elem_t **elem, snd_mixer_elem_type_t type, int compare_weight, void *private_data, void(*private_free)(snd_mixer_elem_t *elem))
Allocate a new mixer element.
Definition: mixer.c:373
int snd_mixer_selem_is_active(snd_mixer_elem_t *elem)
Get info about the active state of a mixer simple element.
Definition: simple.c:245
int snd_mixer_selem_has_common_switch(snd_mixer_elem_t *elem)
Return true if mixer simple element has only one switch control for both playback and capture...
Definition: simple.c:208
void snd_mixer_elem_set_callback(snd_mixer_elem_t *obj, snd_mixer_elem_callback_t val)
Set callback function for a mixer element.
Definition: mixer.c:905
snd_mixer_elem_t * snd_mixer_find_selem(snd_mixer_t *mixer, const snd_mixer_selem_id_t *id)
Find a mixer simple element.
Definition: simple.c:133
void snd_mixer_selem_get_id(snd_mixer_elem_t *element, snd_mixer_selem_id_t *id)
Get mixer simple element identifier.
Definition: simple.c:156
int snd_mixer_selem_has_capture_switch_exclusive(snd_mixer_elem_t *elem)
Return info about capture switch control of a mixer simple element.
Definition: simple.c:669
Definition: mixer.h:174
int snd_mixer_selem_set_capture_dB_all(snd_mixer_elem_t *elem, long value, int dir)
Set value in dB of capture volume control for all channels of a mixer simple element.
Definition: simple.c:820
int snd_mixer_selem_set_capture_switch_all(snd_mixer_elem_t *elem, int value)
Set value of capture switch control for all channels of a mixer simple element.
Definition: simple.c:857
struct _snd_hctl snd_hctl_t
Definition: control.h:500
int snd_mixer_detach(snd_mixer_t *mixer, const char *name)
Detach a previously attached HCTL to an opened mixer freeing all related resources.
Definition: mixer.c:250
struct _snd_hctl_elem snd_hctl_elem_t
Definition: control.h:497
int snd_mixer_selem_get_capture_volume(snd_mixer_elem_t *elem, snd_mixer_selem_channel_id_t channel, long *value)
Return value of capture volume control of a mixer simple element.
Definition: simple.c:726
int snd_mixer_selem_set_capture_volume(snd_mixer_elem_t *elem, snd_mixer_selem_channel_id_t channel, long value)
Set value of capture volume control of a mixer simple element.
Definition: simple.c:768
int snd_mixer_attach(snd_mixer_t *mixer, const char *name)
Attach an HCTL specified with the CTL device name to an opened mixer.
Definition: mixer.c:198
snd_mixer_elem_t * snd_mixer_first_elem(snd_mixer_t *mixer)
get first element for a mixer
Definition: mixer.c:788
int(* snd_mixer_elem_callback_t)(snd_mixer_elem_t *elem, unsigned int mask)
Mixer element callback function.
Definition: mixer.h:65
int snd_mixer_class_set_private_free(snd_mixer_class_t *class_, void(*private_free)(snd_mixer_class_t *))
Set mixer private data free callback to given mixer class.
Definition: mixer.c:1067
int snd_mixer_selem_set_capture_dB(snd_mixer_elem_t *elem, snd_mixer_selem_channel_id_t channel, long value, int dir)
Set value in dB of capture volume control of a mixer simple element.
Definition: simple.c:783
const char * snd_mixer_selem_channel_name(snd_mixer_selem_channel_id_t channel)
Return name of mixer simple element channel.
Definition: simple.c:219
Definition: mixer.h:178
struct _snd_mixer snd_mixer_t
Definition: mixer.h:42
int snd_mixer_selem_get_playback_volume(snd_mixer_elem_t *elem, snd_mixer_selem_channel_id_t channel, long *value)
Return value of playback volume control of a mixer simple element.
Definition: simple.c:397
int snd_mixer_elem_detach(snd_mixer_elem_t *melem, snd_hctl_elem_t *helem)
Detach an HCTL element from a mixer element.
Definition: mixer.c:110
void * ptr
Definition: seq_event.h:199
Definition: mixer.h:176
int snd_mixer_get_hctl(snd_mixer_t *mixer, const char *name, snd_hctl_t **hctl)
Obtain a HCTL pointer associated to given name.
Definition: mixer.c:296
int snd_mixer_selem_set_playback_switch_all(snd_mixer_elem_t *elem, int value)
Set value of playback switch control for all channels of a mixer simple element.
Definition: simple.c:534
int snd_mixer_set_compare(snd_mixer_t *mixer, snd_mixer_compare_t msort)
Change mixer compare function and reorder elements.
Definition: mixer.c:666
Definition: mixer.h:201
int snd_mixer_selem_has_playback_channel(snd_mixer_elem_t *obj, snd_mixer_selem_channel_id_t channel)
Get info about channels of playback stream of a mixer simple element.
Definition: simple.c:268
int snd_mixer_wait(snd_mixer_t *mixer, int timeout)
Wait for a mixer to become ready (i.e. at least one event pending)
Definition: mixer.c:760
int(* snd_mixer_callback_t)(snd_mixer_t *ctl, unsigned int mask, snd_mixer_elem_t *elem)
Mixer callback function.
Definition: mixer.h:55
struct _snd_pcm snd_pcm_t
Definition: pcm.h:374
int snd_mixer_selem_has_playback_switch(snd_mixer_elem_t *elem)
Return info about playback switch control existence of a mixer simple element.
Definition: simple.c:344
int snd_mixer_selem_has_playback_volume(snd_mixer_elem_t *elem)
Return info about playback volume control of a mixer simple element.
Definition: simple.c:322

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