flac/include/FLAC/file_decoder.h

137 lines
5.8 KiB
C

/* libFLAC - Free Lossless Audio Codec library
* Copyright (C) 2000,2001 Josh Coalson
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef FLAC__FILE_DECODER_H
#define FLAC__FILE_DECODER_H
#include "stream_decoder.h"
typedef enum {
FLAC__FILE_DECODER_OK = 0,
FLAC__FILE_DECODER_SEEKING,
FLAC__FILE_DECODER_END_OF_FILE,
FLAC__FILE_DECODER_ERROR_OPENING_FILE,
FLAC__FILE_DECODER_MEMORY_ALLOCATION_ERROR,
FLAC__FILE_DECODER_SEEK_ERROR,
FLAC__FILE_DECODER_STREAM_ERROR,
FLAC__FILE_DECODER_MD5_ERROR,
FLAC__FILE_DECODER_STREAM_DECODER_ERROR,
FLAC__FILE_DECODER_ALREADY_INITIALIZED,
FLAC__FILE_DECODER_INVALID_CALLBACK,
FLAC__FILE_DECODER_UNINITIALIZED
} FLAC__FileDecoderState;
extern const char *FLAC__FileDecoderStateString[];
/***********************************************************************
*
* class FLAC__FileDecoder : public FLAC__StreamDecoder
*
***********************************************************************/
struct FLAC__FileDecoderProtected;
struct FLAC__FileDecoderPrivate;
typedef struct {
struct FLAC__FileDecoderProtected *protected;
struct FLAC__FileDecoderPrivate *private;
} FLAC__FileDecoder;
/***********************************************************************
*
* Class constructor/destructor
*
***********************************************************************/
/*
* Any parameters that are not set before FLAC__file_decoder_init()
* will take on the defaults from the constructor, shown below.
* For more on what the parameters mean, see the documentation.
*
* bool md5_checking (DEFAULT: false) MD5 checking will be turned off if a seek is requested
* (*write_callback)() (DEFAULT: NULL ) The callbacks are the only values that MUST be set before FLAC__file_decoder_init()
* (*metadata_callback)() (DEFAULT: NULL )
* (*error_callback)() (DEFAULT: NULL )
* void* client_data (DEFAULT: NULL ) passed back through the callbacks
*/
FLAC__FileDecoder *FLAC__file_decoder_new();
void FLAC__file_decoder_delete(FLAC__FileDecoder *);
/***********************************************************************
*
* Public class method prototypes
*
***********************************************************************/
/*
* Various "set" methods. These may only be called when the decoder
* is in the state FLAC__FILE_DECODER_UNINITIALIZED, i.e. after
* FLAC__file_decoder_new() or FLAC__file_decoder_finish(), but
* before FLAC__file_decoder_init(). If this is the case they will
* return true, otherwise false.
*
* NOTE that these functions do not validate the values as many are
* interdependent. The FLAC__file_decoder_init() function will do
* this, so make sure to pay attention to the state returned by
* FLAC__file_decoder_init().
*
* Any parameters that are not set before FLAC__file_decoder_init()
* will take on the defaults from the constructor. NOTE that
* FLAC__file_decoder_flush() or FLAC__file_decoder_reset() do
* NOT reset the values to the constructor defaults.
*/
bool FLAC__file_decoder_set_md5_checking(const FLAC__FileDecoder *decoder, bool value);
bool FLAC__file_decoder_set_filename(const FLAC__FileDecoder *decoder, const char *value);
bool FLAC__file_decoder_set_write_callback(const FLAC__FileDecoder *decoder, FLAC__StreamDecoderWriteStatus (*value)(const FLAC__FileDecoder *decoder, const FLAC__Frame *frame, const int32 *buffer[], void *client_data));
bool FLAC__file_decoder_set_metadata_callback(const FLAC__FileDecoder *decoder, void (*value)(const FLAC__FileDecoder *decoder, const FLAC__StreamMetaData *metadata, void *client_data));
bool FLAC__file_decoder_set_error_callback(const FLAC__FileDecoder *decoder, void (*value)(const FLAC__FileDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data));
bool FLAC__file_decoder_set_client_data(const FLAC__FileDecoder *decoder, void *value);
/*
* Various "get" methods
*/
FLAC__FileDecoderState FLAC__file_decoder_get_state(const FLAC__FileDecoder *decoder);
bool FLAC__file_decoder_get_md5_checking(const FLAC__FileDecoder *decoder);
/*
* Initialize the instance; should be called after construction and
* 'set' calls but before any of the 'process' or 'seek' calls. Will
* set and return the decoder state, which will be FLAC__FILE_DECODER_OK
* if initializationsucceeded.
*/
FLAC__FileDecoderState FLAC__file_decoder_init(FLAC__FileDecoder *decoder);
/*
* Flush the decoding buffer, release resources, and return the decoder
* state to FLAC__FILE_DECODER_UNINITIALIZED. Only returns false if
* md5_checking is set AND the stored MD5 sum is non-zero AND the stored
* MD5 sum and computed MD5 sum do not match.
*/
bool FLAC__file_decoder_finish(FLAC__FileDecoder *decoder);
/*
* Methods for decoding the data
*/
bool FLAC__file_decoder_process_whole_file(FLAC__FileDecoder *decoder);
bool FLAC__file_decoder_process_metadata(FLAC__FileDecoder *decoder);
bool FLAC__file_decoder_process_one_frame(FLAC__FileDecoder *decoder);
bool FLAC__file_decoder_process_remaining_frames(FLAC__FileDecoder *decoder);
bool FLAC__file_decoder_seek_absolute(FLAC__FileDecoder *decoder, uint64 sample);
#endif