mpd/src/output_api.h

/* the Music Player Daemon (MPD)
 * Copyright (C) 2003-2007 by Warren Dukes (warren.dukes@gmail.com)
 * Copyright (C) 2008 Max Kellermann <max@duempel.org>
 * 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 OUTPUT_API_H
#define OUTPUT_API_H

#include "../config.h"
#include "pcm_utils.h"
#include "audio_format.h"
#include "tag.h"
#include "conf.h"
#include "log.h"
#include "os_compat.h"

#define DISABLED_AUDIO_OUTPUT_PLUGIN(plugin) struct audio_output_plugin plugin;

struct audio_output;

typedef int (*AudioOutputTestDefaultDeviceFunc) (void);

typedef int (*AudioOutputInitDriverFunc) (struct audio_output *audioOutput,
					  ConfigParam * param);

typedef void (*AudioOutputFinishDriverFunc) (struct audio_output *audioOutput);

typedef int (*AudioOutputOpenDeviceFunc) (struct audio_output *audioOutput);

typedef int (*AudioOutputPlayFunc) (struct audio_output *audioOutput,
				    const char *playChunk, size_t size);

typedef void (*AudioOutputDropBufferedAudioFunc) (struct audio_output *audioOutput);

typedef void (*AudioOutputCloseDeviceFunc) (struct audio_output *audioOutput);

typedef void (*AudioOutputSendMetadataFunc) (struct audio_output *audioOutput,
					     const struct tag *tag);

struct audio_output_plugin {
	const char *name;

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

struct audio_output {
	int open;
	const char *name;

	const struct audio_output_plugin *plugin;

	int convertAudioFormat;
	struct audio_format inAudioFormat;
	struct audio_format outAudioFormat;
	struct audio_format reqAudioFormat;
	ConvState convState;
	char *convBuffer;
	size_t convBufferLen;
	int sameInAndOutFormats;

	void *data;
};

#endif