mpd/src/audioOutput.h

/* the Music Player Daemon (MPD)
 * (c)2003-2004 by Warren Dukes (shank@mercury.chem.pitt.edu)
 * 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_OUTPUT_H
#define AUDIO_OUTPUT_H

#include "../config.h"

#include "mpd_types.h"
#include "audio.h"
#include "tag.h"
#include "conf.h"

typedef struct _AudioOutput AudioOutput;

typedef int (* AudioOutputInitDriverFunc) (AudioOutput * audioOutput, 
		ConfigParam * param);

typedef void (* AudioOutputFinishDriverFunc) (AudioOutput * audioOutput);

typedef int (* AudioOutputOpenDeviceFunc) (AudioOutput * audioOutput);

typedef int (* AudioOutputPlayFunc) (AudioOutput * audioOutput,
                char * playChunk, int size);

typedef void (* AudioOutputDropBufferedAudioFunc) (AudioOutput * audioOutput);

typedef void (* AudioOutputCloseDeviceFunc) (AudioOutput * audioOutput);

typedef void (* AudioOutputSendMetadataFunc) (AudioOutput * audioOutput,
		MpdTag * tag);

struct _AudioOutput {
	int open;
	char * name;
	char * type;

        AudioOutputFinishDriverFunc finishDriverFunc;
        AudioOutputOpenDeviceFunc openDeviceFunc;
        AudioOutputPlayFunc playFunc;
        AudioOutputDropBufferedAudioFunc dropBufferedAudioFunc;
        AudioOutputCloseDeviceFunc closeDeviceFunc;
	AudioOutputSendMetadataFunc sendMetdataFunc;

	int convertAudioFormat;
	AudioFormat inAudioFormat;
	AudioFormat outAudioFormat;
	char * convBuffer;
	int convBufferLen;
	int sameInAndOutFormats;

        void * data;
};

typedef struct _AudioOutputPlugin {
	char * name;

        AudioOutputInitDriverFunc initDriverFunc;
        AudioOutputFinishDriverFunc finishDriverFunc;
        AudioOutputOpenDeviceFunc openDeviceFunc;
        AudioOutputPlayFunc playFunc;
        AudioOutputDropBufferedAudioFunc dropBufferedAudioFunc;
        AudioOutputCloseDeviceFunc closeDeviceFunc;
	AudioOutputSendMetadataFunc sendMetdataFunc;
} AudioOutputPlugin;

void initAudioOutputPlugins();
void finishAudioOutputPlugins();

void loadAudioOutputPlugin(AudioOutputPlugin * audioOutputPlugin);
void unloadAudioOutputPlugin(AudioOutputPlugin * audioOutputPlugin);

AudioOutput * newAudioOutput(ConfigParam * param);
int openAudioOutput(AudioOutput * audioOutput, AudioFormat * audioFormat);
int playAudioOutput(AudioOutput * audioOutput, char * playChunk, int size);
void dropBufferedAudioOutput(AudioOutput * audioOutput);
void closeAudioOutput(AudioOutput * audioOutput);
void finishAudioOutput(AudioOutput * audioOutput);
int keepAudioOutputAlive(AudioOutput * audioOutput, int ms);
void sendMetadataToAudioOutput(AudioOutput * audioOutput, MpdTag * tag);

#endif