mirror of
https://github.com/alsa-project/alsa-lib.git
synced 2025-10-29 05:40:25 -04:00
114 lines
4.3 KiB
C
114 lines
4.3 KiB
C
/****************************************************************************
|
|
* *
|
|
* mixer.h *
|
|
* Mixer Interface *
|
|
* *
|
|
****************************************************************************/
|
|
|
|
typedef struct _snd_mixer snd_mixer_t;
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
int snd_mixer_open(snd_mixer_t **handle, char *name);
|
|
int snd_mixer_close(snd_mixer_t *handle);
|
|
int snd_mixer_poll_descriptor(snd_mixer_t *handle);
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
/*
|
|
* Simple (legacy) mixer API
|
|
*/
|
|
|
|
typedef enum _snd_mixer_channel_id {
|
|
SND_MIXER_CHN_FRONT_LEFT = 0,
|
|
SND_MIXER_CHN_FRONT_RIGHT,
|
|
SND_MIXER_CHN_FRONT_CENTER,
|
|
SND_MIXER_CHN_REAR_LEFT,
|
|
SND_MIXER_CHN_REAR_RIGHT,
|
|
SND_MIXER_CHN_WOOFER,
|
|
SND_MIXER_CHN_LAST = 31,
|
|
SND_MIXER_CHN_MONO = SND_MIXER_CHN_FRONT_LEFT
|
|
} snd_mixer_channel_id_t;
|
|
|
|
#define SND_MIXER_CHN_MASK_MONO (1<<SND_MIXER_CHN_MONO)
|
|
#define SND_MIXER_CHN_MASK_FRONT_LEFT (1<<SND_MIXER_CHN_FRONT_LEFT)
|
|
#define SND_MIXER_CHN_MASK_FRONT_RIGHT (1<<SND_MIXER_CHN_FRONT_RIGHT)
|
|
#define SND_MIXER_CHN_MASK_FRONT_CENTER (1<<SND_MIXER_CHN_FRONT_CENTER)
|
|
#define SND_MIXER_CHN_MASK_REAR_LEFT (1<<SND_MIXER_CHN_REAR_LEFT)
|
|
#define SND_MIXER_CHN_MASK_REAR_RIGHT (1<<SND_MIXER_CHN_REAR_RIGHT)
|
|
#define SND_MIXER_CHN_MASK_WOOFER (1<<SND_MIXER_CHN_WOOFER)
|
|
#define SND_MIXER_CHN_MASK_STEREO (SND_MIXER_CHN_MASK_FRONT_LEFT|SND_MIXER_CHN_MASK_FRONT_RIGHT)
|
|
|
|
#define SND_MIXER_SCTCAP_VOLUME (1<<0)
|
|
#define SND_MIXER_SCTCAP_JOINTLY_VOLUME (1<<1)
|
|
#define SND_MIXER_SCTCAP_MUTE (1<<2)
|
|
#define SND_MIXER_SCTCAP_JOINTLY_MUTE (1<<3)
|
|
#define SND_MIXER_SCTCAP_CAPTURE (1<<4)
|
|
#define SND_MIXER_SCTCAP_JOINTLY_CAPTURE (1<<5)
|
|
#define SND_MIXER_SCTCAP_EXCL_CAPTURE (1<<6)
|
|
|
|
typedef struct _snd_mixer_sid {
|
|
unsigned char name[60];
|
|
unsigned int index;
|
|
} snd_mixer_sid_t;
|
|
|
|
typedef struct _snd_mixer_simple_control_list {
|
|
unsigned int controls_offset; /* W: first control ID to get */
|
|
unsigned int controls_request; /* W: count of control IDs to get */
|
|
unsigned int controls_count; /* R: count of available (set) IDs */
|
|
unsigned int controls; /* R: count of all available controls */
|
|
snd_mixer_sid_t *pids; /* W: IDs */
|
|
char reserved[50];
|
|
} snd_mixer_simple_control_list_t;
|
|
|
|
typedef struct _snd_mixer_simple_control {
|
|
snd_mixer_sid_t sid; /* WR: simple control identification */
|
|
unsigned int caps; /* RO: capabilities */
|
|
unsigned int channels; /* RO: bitmap of active channels */
|
|
unsigned int mute; /* RW: bitmap of muted channels */
|
|
unsigned int capture; /* RW: bitmap of capture channels */
|
|
int capture_group; /* RO: capture group (for exclusive capture) */
|
|
long min; /* RO: minimum value */
|
|
long max; /* RO: maximum value */
|
|
char reserved[32];
|
|
union {
|
|
struct {
|
|
long front_left; /* front left value */
|
|
long front_right; /* front right value */
|
|
long front_center; /* front center */
|
|
long rear_left; /* left rear */
|
|
long rear_right; /* right rear */
|
|
long woofer; /* woofer */
|
|
} names;
|
|
long values[32];
|
|
} volume; /* RW */
|
|
} snd_mixer_simple_control_t;
|
|
|
|
typedef struct _snd_mixer_simple_callbacks {
|
|
void *private_data; /* may be used by an application */
|
|
void (*rebuild) (snd_mixer_t *handle, void *private_data);
|
|
void (*value) (snd_mixer_t *handle, void *private_data, snd_mixer_sid_t *id);
|
|
void (*change) (snd_mixer_t *handle, void *private_data, snd_mixer_sid_t *id);
|
|
void (*add) (snd_mixer_t *handle, void *private_data, snd_mixer_sid_t *id);
|
|
void (*remove) (snd_mixer_t *handle, void *private_data, snd_mixer_sid_t *id);
|
|
void *reserved[58]; /* reserved for future use - must be NULL!!! */
|
|
} snd_mixer_simple_callbacks_t;
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
const char *snd_mixer_simple_channel_name(int channel);
|
|
int snd_mixer_simple_control_list(snd_mixer_t *handle, snd_mixer_simple_control_list_t *list);
|
|
int snd_mixer_simple_control_read(snd_mixer_t *handle, snd_mixer_simple_control_t *simple);
|
|
int snd_mixer_simple_control_write(snd_mixer_t *handle, snd_mixer_simple_control_t *simple);
|
|
int snd_mixer_simple_read(snd_mixer_t *handle, snd_mixer_simple_callbacks_t *callbacks);
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|