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/* the Music Player Daemon (MPD)
* Copyright (C) 2003-2007 by Warren Dukes (warren.dukes@gmail.com)
* This project's homepage is: http://www.musicpd.org
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#ifndef MPD_AUDIO_H
#define MPD_AUDIO_H
#include <stdbool.h>
#include <stdio.h>
#define AUDIO_AO_DRIVER_DEFAULT "default"
struct audio_format;
struct tag;
struct client;
struct config_param;
/**
* Returns the total number of audio output devices, including those
* who are disabled right now.
*/
unsigned int audio_output_count(void);
/**
* Returns the "i"th audio output device.
*/
struct audio_output *
audio_output_get(unsigned i);
/**
* Returns the audio output device with the specified name. Returns
* NULL if the name does not exist.
*/
struct audio_output *
audio_output_find(const char *name);
void getOutputAudioFormat(const struct audio_format *inFormat,
struct audio_format *outFormat);
int parseAudioConfig(struct audio_format *audioFormat, char *conf);
/* make sure initPlayerData is called before this function!! */
void initAudioConfig(void);
void finishAudioConfig(void);
void initAudioDriver(void);
void finishAudioDriver(void);
bool openAudioDevice(const struct audio_format *audioFormat);
bool playAudio(const char *playChunk, size_t size);
void audio_output_pause_all(void);
void dropBufferedAudio(void);
void closeAudioDevice(void);
void sendMetadataToAudioDevice(const struct tag *tag);
/* these functions are called in the main parent process while the child
process is busy playing to the audio */
int enableAudioDevice(unsigned int device);
int disableAudioDevice(unsigned int device);
void printAudioDevices(struct client *client);
void readAudioDevicesState(FILE *fp);
void saveAudioDevicesState(FILE *fp);
bool mixer_control_setvol(unsigned int device, int volume, int rel);
bool mixer_control_getvol(unsigned int device, int *volume);
#endif
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