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/* 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 DECODER_API_H
#define DECODER_API_H
/*
* This is the public API which is used by decoder plugins to
* communicate with the mpd core.
*
*/
#include "inputStream.h"
#include "replayGain.h"
#include "tag.h"
#include "playerData.h"
/* valid values for streamTypes in the InputPlugin struct: */
#define INPUT_PLUGIN_STREAM_FILE 0x01
#define INPUT_PLUGIN_STREAM_URL 0x02
struct decoder;
/* optional, set this to NULL if the InputPlugin doesn't have/need one
* this must return < 0 if there is an error and >= 0 otherwise */
typedef int (*InputPlugin_initFunc) (void);
/* optional, set this to NULL if the InputPlugin doesn't have/need one */
typedef void (*InputPlugin_finishFunc) (void);
/* boolean return value, returns 1 if the InputStream is decodable by
* the InputPlugin, 0 if not */
typedef unsigned int (*InputPlugin_tryDecodeFunc) (InputStream *);
/* this will be used to decode InputStreams, and is recommended for files
* and networked (HTTP) connections.
*
* returns -1 on error, 0 on success */
typedef int (*InputPlugin_streamDecodeFunc) (struct decoder *,
InputStream *);
/* use this if and only if your InputPlugin can only be passed a filename or
* handle as input, and will not allow callbacks to be set (like Ogg-Vorbis
* and FLAC libraries allow)
*
* returns -1 on error, 0 on success */
typedef int (*InputPlugin_fileDecodeFunc) (struct decoder *,
char *path);
/* file should be the full path! Returns NULL if a tag cannot be found
* or read */
typedef MpdTag *(*InputPlugin_tagDupFunc) (char *file);
typedef struct _InputPlugin {
const char *name;
InputPlugin_initFunc initFunc;
InputPlugin_finishFunc finishFunc;
InputPlugin_tryDecodeFunc tryDecodeFunc;
InputPlugin_streamDecodeFunc streamDecodeFunc;
InputPlugin_fileDecodeFunc fileDecodeFunc;
InputPlugin_tagDupFunc tagDupFunc;
/* one or more of the INPUT_PLUGIN_STREAM_* values OR'd together */
unsigned char streamTypes;
/* last element in these arrays must always be a NULL: */
const char *const*suffixes;
const char *const*mimeTypes;
} InputPlugin;
/**
* Opaque handle which the decoder plugin passes to the functions in
* this header.
*/
struct decoder;
/**
* Notify the player thread that it has finished initialization and
* that it has read the song's meta data.
*/
void decoder_initialized(struct decoder * decoder,
const AudioFormat * audio_format,
float total_time);
enum decoder_command decoder_get_command(struct decoder * decoder);
/**
* Called by the decoder when it has performed the requested command
* (dc->command). This function resets dc->command and wakes up the
* player thread.
*/
void decoder_command_finished(struct decoder * decoder);
/**
* This function is called by the decoder plugin when it has
* successfully decoded block of input data.
*
* We send inStream for buffering the inputStream while waiting to
* send the next chunk
*/
int decoder_data(struct decoder *decoder, InputStream * inStream,
int seekable,
void *data, size_t datalen,
float data_time, mpd_uint16 bitRate,
ReplayGainInfo * replayGainInfo);
void decoder_flush(struct decoder *decoder);
void decoder_clear(struct decoder *decoder);
#endif
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