80 lines
2.0 KiB
C
80 lines
2.0 KiB
C
/*
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* Copyright (C) 2003-2009 The Music Player Daemon Project
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* http://www.musicpd.org
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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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,
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const struct config_param *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, const struct config_param *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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