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/****************************************************************************
* *
* mixer.h *
* Mixer Interface *
* *
****************************************************************************/
typedef struct _snd_mixer snd_mixer_t;
typedef struct _snd_mixer_class snd_mixer_class_t;
typedef struct _snd_mixer_info snd_mixer_info_t;
typedef struct _snd_mixer_elem snd_mixer_elem_t;
typedef int (*snd_mixer_callback_t)(snd_mixer_t *ctl,
unsigned int mask,
snd_mixer_elem_t *elem);
typedef int (*snd_mixer_elem_callback_t)(snd_mixer_elem_t *elem,
unsigned int mask);
typedef int (*snd_mixer_compare_t)(const snd_mixer_elem_t *e1,
const snd_mixer_elem_t *e2);
typedef enum _snd_mixer_elem_type {
SND_MIXER_ELEM_SIMPLE,
SND_MIXER_ELEM_LAST = SND_MIXER_ELEM_SIMPLE,
} snd_mixer_elem_type_t;
#ifdef __cplusplus
extern "C" {
#endif
int snd_mixer_open(snd_mixer_t **mixer, int mode);
int snd_mixer_close(snd_mixer_t *mixer);
int snd_mixer_info(snd_mixer_t *mixer, snd_mixer_info_t *info);
snd_mixer_elem_t *snd_mixer_first_elem(snd_mixer_t *mixer);
snd_mixer_elem_t *snd_mixer_last_elem(snd_mixer_t *mixer);
int snd_mixer_handle_events(snd_mixer_t *mixer);
int snd_mixer_attach(snd_mixer_t *mixer, const char *name);
int snd_mixer_detach(snd_mixer_t *mixer, const char *name);
int snd_mixer_poll_descriptors_count(snd_mixer_t *mixer);
int snd_mixer_poll_descriptors(snd_mixer_t *mixer, struct pollfd *pfds, unsigned int space);
int snd_mixer_load(snd_mixer_t *mixer);
void snd_mixer_free(snd_mixer_t *mixer);
int snd_mixer_wait(snd_mixer_t *mixer, int timeout);
int snd_mixer_set_compare(snd_mixer_t *mixer, snd_mixer_compare_t msort);
snd_mixer_elem_t *snd_mixer_elem_next(snd_mixer_elem_t *elem);
snd_mixer_elem_t *snd_mixer_elem_prev(snd_mixer_elem_t *elem);
int snd_mixer_class_unregister(snd_mixer_class_t *clss);
#ifdef __cplusplus
}
#endif
/*
* Simple (legacy) mixer API
*/
typedef enum _snd_mixer_selem_channel_id {
SND_MIXER_SCHN_UNKNOWN = -1,
SND_MIXER_SCHN_FRONT_LEFT = 0,
SND_MIXER_SCHN_FRONT_RIGHT,
SND_MIXER_SCHN_FRONT_CENTER,
SND_MIXER_SCHN_REAR_LEFT,
SND_MIXER_SCHN_REAR_RIGHT,
SND_MIXER_SCHN_WOOFER,
SND_MIXER_SCHN_LAST = 31,
SND_MIXER_SCHN_MONO = SND_MIXER_SCHN_FRONT_LEFT
} snd_mixer_selem_channel_id_t;
/* Simple mixer */
typedef struct _snd_mixer_selem_id snd_mixer_selem_id_t;
#ifdef __cplusplus
extern "C" {
#endif
const char *snd_mixer_selem_channel_name(snd_mixer_selem_channel_id_t channel);
int snd_mixer_selem_register(snd_mixer_t *mixer, void *arg,
snd_mixer_class_t **classp);
void snd_mixer_selem_get_id(snd_mixer_elem_t *element,
snd_mixer_selem_id_t *id);
const char *snd_mixer_selem_get_name(snd_mixer_elem_t *elem);
unsigned int snd_mixer_selem_get_index(snd_mixer_elem_t *elem);
snd_mixer_elem_t *snd_mixer_find_selem(snd_mixer_t *mixer,
const snd_mixer_selem_id_t *id);
int snd_mixer_selem_is_playback_mono(snd_mixer_elem_t *elem);
int snd_mixer_selem_has_playback_channel(snd_mixer_elem_t *obj, snd_mixer_selem_channel_id_t channel);
int snd_mixer_selem_get_playback_min(snd_mixer_elem_t *elem);
int snd_mixer_selem_get_playback_max(snd_mixer_elem_t *elem);
int snd_mixer_selem_is_capture_mono(snd_mixer_elem_t *elem);
int snd_mixer_selem_has_capture_channel(snd_mixer_elem_t *obj, snd_mixer_selem_channel_id_t channel);
int snd_mixer_selem_get_capture_min(snd_mixer_elem_t *elem);
int snd_mixer_selem_get_capture_max(snd_mixer_elem_t *elem);
int snd_mixer_selem_get_capture_group(snd_mixer_elem_t *elem);
int snd_mixer_selem_has_common_volume(snd_mixer_elem_t *elem);
int snd_mixer_selem_has_playback_volume(snd_mixer_elem_t *elem);
int snd_mixer_selem_has_playback_volume_joined(snd_mixer_elem_t *elem);
int snd_mixer_selem_has_capture_volume(snd_mixer_elem_t *elem);
int snd_mixer_selem_has_capture_volume_joined(snd_mixer_elem_t *elem);
int snd_mixer_selem_has_common_switch(snd_mixer_elem_t *elem);
int snd_mixer_selem_has_playback_switch(snd_mixer_elem_t *elem);
int snd_mixer_selem_has_playback_switch_joined(snd_mixer_elem_t *elem);
int snd_mixer_selem_has_capture_switch(snd_mixer_elem_t *elem);
int snd_mixer_selem_has_capture_switch_joined(snd_mixer_elem_t *elem);
int snd_mixer_selem_has_capture_switch_exclusive(snd_mixer_elem_t *elem);
int snd_mixer_selem_get_playback_volume(snd_mixer_elem_t *elem, snd_mixer_selem_channel_id_t channel, long *value);
int snd_mixer_selem_get_capture_volume(snd_mixer_elem_t *elem, snd_mixer_selem_channel_id_t channel, long *value);
int snd_mixer_selem_get_playback_switch(snd_mixer_elem_t *elem, snd_mixer_selem_channel_id_t channel, int *value);
int snd_mixer_selem_get_capture_switch(snd_mixer_elem_t *elem, snd_mixer_selem_channel_id_t channel, int *value);
int snd_mixer_selem_set_playback_volume(snd_mixer_elem_t *elem, snd_mixer_selem_channel_id_t channel, long value);
int snd_mixer_selem_set_capture_volume(snd_mixer_elem_t *elem, snd_mixer_selem_channel_id_t channel, long value);
int snd_mixer_selem_set_playback_volume_all(snd_mixer_elem_t *elem, long value);
int snd_mixer_selem_set_capture_volume_all(snd_mixer_elem_t *elem, long value);
int snd_mixer_selem_set_playback_switch(snd_mixer_elem_t *elem, snd_mixer_selem_channel_id_t channel, int value);
int snd_mixer_selem_set_capture_switch(snd_mixer_elem_t *elem, snd_mixer_selem_channel_id_t channel, int value);
int snd_mixer_selem_set_playback_switch_all(snd_mixer_elem_t *elem, int value);
int snd_mixer_selem_set_capture_switch_all(snd_mixer_elem_t *elem, int value);
void snd_mixer_selem_set_playback_volume_range(snd_mixer_elem_t *elem,
long min, long max);
void snd_mixer_selem_set_capture_volume_range(snd_mixer_elem_t *elem,
long min, long max);
#ifdef __cplusplus
}
#endif
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