11c29cccb3
This patch tryes to introduce pluggable mixer (struct mixer_plugin) along with some basic infrastructure (mixer_* functions). Instance of mixer (struct mixer) is used in alsa and oss output plugin
62 lines
1.2 KiB
C
62 lines
1.2 KiB
C
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#ifndef MPD_MIXER_H
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#define MPD_MIXER_H
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#include "conf.h"
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/*
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* list of currently implemented mixers
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*/
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extern struct mixer_plugin alsa_mixer;
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extern struct mixer_plugin oss_mixer;
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struct mixer_data;
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struct mixer_plugin {
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/**
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* Allocate and initialize mixer data
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*/
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struct mixer_data *(*init)(void);
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/**
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* Finish and free mixer data
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*/
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void (*finish)(struct mixer_data *data);
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/**
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* Setup and configure mixer
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*/
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void (*configure)(struct mixer_data *data, ConfigParam *param);
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/**
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* Open mixer device
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*/
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bool (*open)(struct mixer_data *data);
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/**
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* Control mixer device.
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*/
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bool (*control)(struct mixer_data *data, int cmd, void *arg);
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/**
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* Close mixer device
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*/
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void (*close)(struct mixer_data *data);
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};
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struct mixer {
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struct mixer_plugin *plugin;
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struct mixer_data *data;
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};
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void mixer_init(struct mixer *mixer, struct mixer_plugin *plugin);
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void mixer_finish(struct mixer *mixer);
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void mixer_configure(struct mixer *mixer, ConfigParam *param);
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bool mixer_open(struct mixer *mixer);
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bool mixer_control(struct mixer *mixer, int cmd, void *arg);
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void mixer_close(struct mixer *mixer);
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#endif
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