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#ifndef MPD_MIXER_H
#define MPD_MIXER_H
#include "conf.h"
/*
* list of currently implemented mixers
*/
extern struct mixer_plugin alsa_mixer;
extern struct mixer_plugin oss_mixer;
struct mixer_data;
struct mixer_plugin {
/**
* Allocate and initialize mixer data
*/
struct mixer_data *(*init)(void);
/**
* Finish and free mixer data
*/
void (*finish)(struct mixer_data *data);
/**
* Setup and configure mixer
*/
void (*configure)(struct mixer_data *data,
const struct config_param *param);
/**
* Open mixer device
*/
bool (*open)(struct mixer_data *data);
/**
* Control mixer device.
*/
bool (*control)(struct mixer_data *data, int cmd, void *arg);
/**
* Close mixer device
*/
void (*close)(struct mixer_data *data);
};
struct mixer {
struct mixer_plugin *plugin;
struct mixer_data *data;
};
void mixer_init(struct mixer *mixer, struct mixer_plugin *plugin);
void mixer_finish(struct mixer *mixer);
void mixer_configure(struct mixer *mixer, const struct config_param *param);
bool mixer_open(struct mixer *mixer);
bool mixer_control(struct mixer *mixer, int cmd, void *arg);
void mixer_close(struct mixer *mixer);
#endif
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