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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 AUDIO_H
#define AUDIO_H
#include "mpd_types.h"
#include "tag.h"
#include "os_compat.h"
#define AUDIO_AO_DRIVER_DEFAULT "default"
typedef struct _AudioFormat {
volatile mpd_sint8 channels;
volatile mpd_uint32 sampleRate;
volatile mpd_sint8 bits;
} AudioFormat;
unsigned int audio_device_count(void);
static inline double audioFormatSizeToTime(const AudioFormat * af)
{
return 8.0 / af->bits / af->channels / af->sampleRate;
}
void copyAudioFormat(AudioFormat * dest, const AudioFormat * src);
int cmpAudioFormat(const AudioFormat * dest, const AudioFormat * src);
void getOutputAudioFormat(const AudioFormat * inFormat,
AudioFormat * outFormat);
int parseAudioConfig(AudioFormat * audioFormat, char *conf);
/* make sure initPlayerData is called before this function!! */
void initAudioConfig(void);
void finishAudioConfig(void);
void initAudioDriver(void);
void finishAudioDriver(void);
int openAudioDevice(const AudioFormat * audioFormat);
int playAudio(const char *playChunk, size_t size);
void dropBufferedAudio(void);
void closeAudioDevice(void);
int isAudioDeviceOpen(void);
int isCurrentAudioFormat(const AudioFormat * audioFormat);
void sendMetadataToAudioDevice(MpdTag * tag);
/* these functions are called in the main parent process while the child
process is busy playing to the audio */
int enableAudioDevice(int fd, unsigned int device);
int disableAudioDevice(int fd, unsigned int device);
void printAudioDevices(int fd);
void readAudioDevicesState(FILE *fp);
void saveAudioDevicesState(FILE *fp);
void loadAudioDrivers(void);
#endif
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