mirror of https://github.com/xiph/flac
split most of FileDecoder off to new SeekableStreamDecoder
This commit is contained in:
Josh Coalson
parent
53ad911a1d
commit
dbd84c48e5
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@ -24,6 +24,7 @@ include_HEADERS = \
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format.h \
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format.h \
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ordinals.h \
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ordinals.h \
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seek_table.h \
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seek_table.h \
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seekable_stream_decoder.h \
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stream_decoder.h \
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stream_decoder.h \
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stream_encoder.h \
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stream_encoder.h \
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utility.h
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utility.h
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@ -25,6 +25,7 @@
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#include "format.h"
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#include "format.h"
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#include "ordinals.h"
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#include "ordinals.h"
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#include "seek_table.h"
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#include "seek_table.h"
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#include "seekable_stream_decoder.h"
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#include "stream_decoder.h"
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#include "stream_decoder.h"
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#include "stream_encoder.h"
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#include "stream_encoder.h"
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#include "utility.h"
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#include "utility.h"
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@ -24,17 +24,18 @@
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typedef enum {
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typedef enum {
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FLAC__FILE_DECODER_OK = 0,
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FLAC__FILE_DECODER_OK = 0,
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FLAC__FILE_DECODER_SEEKING,
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FLAC__FILE_DECODER_SEEKING, /*@@@ NOTE: unused; remove this in the next minor-version */
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FLAC__FILE_DECODER_END_OF_FILE,
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FLAC__FILE_DECODER_END_OF_FILE,
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FLAC__FILE_DECODER_ERROR_OPENING_FILE,
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FLAC__FILE_DECODER_ERROR_OPENING_FILE,
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FLAC__FILE_DECODER_MEMORY_ALLOCATION_ERROR,
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FLAC__FILE_DECODER_MEMORY_ALLOCATION_ERROR,
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FLAC__FILE_DECODER_SEEK_ERROR,
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FLAC__FILE_DECODER_SEEK_ERROR,
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FLAC__FILE_DECODER_STREAM_ERROR,
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FLAC__FILE_DECODER_STREAM_ERROR,
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FLAC__FILE_DECODER_MD5_ERROR,
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FLAC__FILE_DECODER_MD5_ERROR, /*@@@ NOTE: unused; remove this in the next minor-version */
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FLAC__FILE_DECODER_STREAM_DECODER_ERROR,
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FLAC__FILE_DECODER_STREAM_DECODER_ERROR,
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FLAC__FILE_DECODER_ALREADY_INITIALIZED,
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FLAC__FILE_DECODER_ALREADY_INITIALIZED,
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FLAC__FILE_DECODER_INVALID_CALLBACK,
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FLAC__FILE_DECODER_INVALID_CALLBACK,
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FLAC__FILE_DECODER_UNINITIALIZED
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FLAC__FILE_DECODER_UNINITIALIZED,
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FLAC__FILE_DECODER_SEEKABLE_STREAM_ERROR = FLAC__FILE_DECODER_STREAM_ERROR /*@@@ NOTE: do the actual replacement in the next minor-version */
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} FLAC__FileDecoderState;
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} FLAC__FileDecoderState;
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extern const char *FLAC__FileDecoderStateString[];
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extern const char *FLAC__FileDecoderStateString[];
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@ -111,7 +112,7 @@ FLAC__bool FLAC__file_decoder_get_md5_checking(const FLAC__FileDecoder *decoder)
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* Initialize the instance; should be called after construction and
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* Initialize the instance; should be called after construction and
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* 'set' calls but before any of the 'process' or 'seek' calls. Will
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* 'set' calls but before any of the 'process' or 'seek' calls. Will
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* set and return the decoder state, which will be FLAC__FILE_DECODER_OK
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* set and return the decoder state, which will be FLAC__FILE_DECODER_OK
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* if initializationsucceeded.
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* if initialization succeeded.
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*/
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*/
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FLAC__FileDecoderState FLAC__file_decoder_init(FLAC__FileDecoder *decoder);
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FLAC__FileDecoderState FLAC__file_decoder_init(FLAC__FileDecoder *decoder);
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@ -0,0 +1,167 @@
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/* libFLAC - Free Lossless Audio Codec library
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* Copyright (C) 2000,2001 Josh Coalson
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifndef FLAC__SEEKABLE_STREAM_DECODER_H
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#define FLAC__SEEKABLE_STREAM_DECODER_H
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#include "stream_decoder.h"
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typedef enum {
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FLAC__SEEKABLE_STREAM_DECODER_OK = 0,
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FLAC__SEEKABLE_STREAM_DECODER_SEEKING,
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FLAC__SEEKABLE_STREAM_DECODER_END_OF_STREAM,
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FLAC__SEEKABLE_STREAM_DECODER_MEMORY_ALLOCATION_ERROR,
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FLAC__SEEKABLE_STREAM_DECODER_STREAM_ERROR,
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FLAC__SEEKABLE_STREAM_DECODER_READ_ERROR,
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FLAC__SEEKABLE_STREAM_DECODER_SEEK_ERROR,
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FLAC__SEEKABLE_STREAM_DECODER_ALREADY_INITIALIZED,
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FLAC__SEEKABLE_STREAM_DECODER_INVALID_CALLBACK,
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FLAC__SEEKABLE_STREAM_DECODER_UNINITIALIZED
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} FLAC__SeekableStreamDecoderState;
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extern const char *FLAC__SeekableStreamDecoderStateString[];
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typedef enum {
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FLAC__SEEKABLE_STREAM_DECODER_READ_STATUS_OK,
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FLAC__SEEKABLE_STREAM_DECODER_READ_STATUS_ERROR
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} FLAC__SeekableStreamDecoderReadStatus;
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extern const char *FLAC__SeekableStreamDecoderReadStatusString[];
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typedef enum {
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FLAC__SEEKABLE_STREAM_DECODER_SEEK_STATUS_OK,
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FLAC__SEEKABLE_STREAM_DECODER_SEEK_STATUS_ERROR
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} FLAC__SeekableStreamDecoderSeekStatus;
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extern const char *FLAC__SeekableStreamDecoderSeekStatusString[];
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typedef enum {
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FLAC__SEEKABLE_STREAM_DECODER_TELL_STATUS_OK,
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FLAC__SEEKABLE_STREAM_DECODER_TELL_STATUS_ERROR
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} FLAC__SeekableStreamDecoderTellStatus;
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extern const char *FLAC__SeekableStreamDecoderTellStatusString[];
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typedef enum {
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FLAC__SEEKABLE_STREAM_DECODER_LENGTH_STATUS_OK,
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FLAC__SEEKABLE_STREAM_DECODER_LENGTH_STATUS_ERROR
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} FLAC__SeekableStreamDecoderLengthStatus;
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extern const char *FLAC__SeekableStreamDecoderLengthStatusString[];
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/***********************************************************************
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*
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* class FLAC__SeekableStreamDecoder : public FLAC__StreamDecoder
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*
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***********************************************************************/
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struct FLAC__SeekableStreamDecoderProtected;
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struct FLAC__SeekableStreamDecoderPrivate;
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typedef struct {
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struct FLAC__SeekableStreamDecoderProtected *protected_; /* avoid the C++ keyword 'protected' */
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struct FLAC__SeekableStreamDecoderPrivate *private_; /* avoid the C++ keyword 'private' */
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} FLAC__SeekableStreamDecoder;
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/***********************************************************************
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*
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* Class constructor/destructor
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*
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***********************************************************************/
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/*
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* Any parameters that are not set before FLAC__seekable_stream_decoder_init()
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* will take on the defaults from the constructor, shown below.
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* For more on what the parameters mean, see the documentation.
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*
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* FLAC__bool md5_checking (DEFAULT: false) MD5 checking will be turned off if a seek is requested
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* (*read_callback)() (DEFAULT: NULL ) The callbacks are the only values that MUST be set before FLAC__seekable_stream_decoder_init()
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* (*seek_callback)() (DEFAULT: NULL )
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* (*tell_callback)() (DEFAULT: NULL )
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* (*length_callback)() (DEFAULT: NULL )
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* (*eof_callback)() (DEFAULT: NULL )
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* (*write_callback)() (DEFAULT: NULL )
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* (*metadata_callback)() (DEFAULT: NULL )
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* (*error_callback)() (DEFAULT: NULL )
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* void* client_data (DEFAULT: NULL ) passed back through the callbacks
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*/
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FLAC__SeekableStreamDecoder *FLAC__seekable_stream_decoder_new();
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void FLAC__seekable_stream_decoder_delete(FLAC__SeekableStreamDecoder *);
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/***********************************************************************
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*
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* Public class method prototypes
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*
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***********************************************************************/
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/*
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* Various "set" methods. These may only be called when the decoder
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* is in the state FLAC__SEEKABLE_STREAM_DECODER_UNINITIALIZED, i.e. after
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* FLAC__seekable_stream_decoder_new() or FLAC__seekable_stream_decoder_finish(),
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* but before FLAC__seekable_stream_decoder_init(). If this is the case they
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* will return true, otherwise false.
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*
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* NOTE that these functions do not validate the values as many are
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* interdependent. The FLAC__seekable_stream_decoder_init() function will
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* do this, so make sure to pay attention to the state returned by
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* FLAC__seekable_stream_decoder_init().
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*
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* Any parameters that are not set before FLAC__seekable_stream_decoder_init()
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* will take on the defaults from the constructor. NOTE that
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* FLAC__seekable_stream_decoder_flush() or FLAC__seekable_stream_decoder_reset()
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* do NOT reset the values to the constructor defaults.
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*/
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FLAC__bool FLAC__seekable_stream_decoder_set_md5_checking(const FLAC__SeekableStreamDecoder *decoder, FLAC__bool value);
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FLAC__bool FLAC__seekable_stream_decoder_set_read_callback(const FLAC__SeekableStreamDecoder *decoder, FLAC__SeekableStreamDecoderReadStatus (*value)(const FLAC__SeekableStreamDecoder *decoder, FLAC__byte buffer[], unsigned *bytes, void *client_data));
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FLAC__bool FLAC__seekable_stream_decoder_set_seek_callback(const FLAC__SeekableStreamDecoder *decoder, FLAC__SeekableStreamDecoderSeekStatus (*value)(const FLAC__SeekableStreamDecoder *decoder, FLAC__uint64 absolute_byte_offset, void *client_data));
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FLAC__bool FLAC__seekable_stream_decoder_set_tell_callback(const FLAC__SeekableStreamDecoder *decoder, FLAC__SeekableStreamDecoderTellStatus (*value)(const FLAC__SeekableStreamDecoder *decoder, FLAC__uint64 *absolute_byte_offset, void *client_data));
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FLAC__bool FLAC__seekable_stream_decoder_set_length_callback(const FLAC__SeekableStreamDecoder *decoder, FLAC__SeekableStreamDecoderLengthStatus (*value)(const FLAC__SeekableStreamDecoder *decoder, FLAC__uint64 *stream_length, void *client_data));
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FLAC__bool FLAC__seekable_stream_decoder_set_eof_callback(const FLAC__SeekableStreamDecoder *decoder, FLAC__bool (*value)(const FLAC__SeekableStreamDecoder *decoder, void *client_data));
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FLAC__bool FLAC__seekable_stream_decoder_set_write_callback(const FLAC__SeekableStreamDecoder *decoder, FLAC__StreamDecoderWriteStatus (*value)(const FLAC__SeekableStreamDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 *buffer[], void *client_data));
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FLAC__bool FLAC__seekable_stream_decoder_set_metadata_callback(const FLAC__SeekableStreamDecoder *decoder, void (*value)(const FLAC__SeekableStreamDecoder *decoder, const FLAC__StreamMetaData *metadata, void *client_data));
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FLAC__bool FLAC__seekable_stream_decoder_set_error_callback(const FLAC__SeekableStreamDecoder *decoder, void (*value)(const FLAC__SeekableStreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data));
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FLAC__bool FLAC__seekable_stream_decoder_set_client_data(const FLAC__SeekableStreamDecoder *decoder, void *value);
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/*
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* Various "get" methods
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*/
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FLAC__SeekableStreamDecoderState FLAC__seekable_stream_decoder_get_state(const FLAC__SeekableStreamDecoder *decoder);
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FLAC__bool FLAC__seekable_stream_decoder_get_md5_checking(const FLAC__SeekableStreamDecoder *decoder);
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/*
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* Initialize the instance; should be called after construction and
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* 'set' calls but before any of the 'process' or 'seek' calls. Will
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* set and return the decoder state, which will be FLAC__SEEKABLE_STREAM_DECODER_OK
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* if initialization succeeded.
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*/
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FLAC__SeekableStreamDecoderState FLAC__seekable_stream_decoder_init(FLAC__SeekableStreamDecoder *decoder);
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/*
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* Flush the decoding buffer, release resources, and return the decoder
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* state to FLAC__SEEKABLE_STREAM_DECODER_UNINITIALIZED. Only returns false if
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* md5_checking is set AND the stored MD5 sum is non-zero AND the stored
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* MD5 sum and computed MD5 sum do not match.
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*/
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FLAC__bool FLAC__seekable_stream_decoder_finish(FLAC__SeekableStreamDecoder *decoder);
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/*
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* Methods for decoding the data
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*/
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FLAC__bool FLAC__seekable_stream_decoder_process_whole_stream(FLAC__SeekableStreamDecoder *decoder);
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FLAC__bool FLAC__seekable_stream_decoder_process_metadata(FLAC__SeekableStreamDecoder *decoder);
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FLAC__bool FLAC__seekable_stream_decoder_process_one_frame(FLAC__SeekableStreamDecoder *decoder);
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FLAC__bool FLAC__seekable_stream_decoder_process_remaining_frames(FLAC__SeekableStreamDecoder *decoder);
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FLAC__bool FLAC__seekable_stream_decoder_seek_absolute(FLAC__SeekableStreamDecoder *decoder, FLAC__uint64 sample);
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#endif
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@ -52,6 +52,7 @@ libFLAC_la_SOURCES = \
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md5.c \
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md5.c \
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memory.c \
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memory.c \
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seek_table.c \
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seek_table.c \
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seekable_stream_decoder.c \
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stream_decoder.c \
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stream_decoder.c \
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stream_encoder.c \
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stream_encoder.c \
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stream_encoder_framing.c \
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stream_encoder_framing.c \
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@ -37,6 +37,7 @@ OBJS = \
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md5.o \
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md5.o \
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memory.o \
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memory.o \
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seek_table.o \
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seek_table.o \
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seekable_stream_decoder.o \
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stream_decoder.o \
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stream_decoder.o \
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stream_encoder.o \
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stream_encoder.o \
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stream_encoder_framing.o \
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stream_encoder_framing.o \
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@ -40,6 +40,7 @@ C_FILES= \
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md5.c \
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md5.c \
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memory.c \
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memory.c \
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seek_table.c \
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seek_table.c \
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seekable_stream_decoder.c \
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stream_decoder.c \
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stream_decoder.c \
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stream_encoder.c \
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stream_encoder.c \
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stream_encoder_framing.c \
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stream_encoder_framing.c \
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File diff suppressed because it is too large
Load Diff
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@ -18,5 +18,6 @@
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noinst_HEADERS = \
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noinst_HEADERS = \
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file_decoder.h \
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file_decoder.h \
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seekable_stream_decoder.h \
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stream_decoder.h \
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stream_decoder.h \
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stream_encoder.h
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stream_encoder.h
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@ -21,6 +21,7 @@
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#define FLAC__PROTECTED__ALL_H
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#define FLAC__PROTECTED__ALL_H
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#include "file_decoder.h"
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#include "file_decoder.h"
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#include "seekable_stream_decoder.h"
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#include "stream_decoder.h"
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#include "stream_decoder.h"
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#include "stream_encoder.h"
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#include "stream_encoder.h"
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@ -23,7 +23,6 @@
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#include "FLAC/file_decoder.h"
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#include "FLAC/file_decoder.h"
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typedef struct FLAC__FileDecoderProtected {
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typedef struct FLAC__FileDecoderProtected {
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FLAC__bool md5_checking; /* if true, generate MD5 signature of decoded data and compare against signature in the Encoding metadata block */
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FLAC__FileDecoderState state;
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FLAC__FileDecoderState state;
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} FLAC__FileDecoderProtected;
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} FLAC__FileDecoderProtected;
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@ -0,0 +1,30 @@
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/* libFLAC - Free Lossless Audio Codec library
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* Copyright (C) 2000,2001 Josh Coalson
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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||||||
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifndef FLAC__PROTECTED__SEEKABLE_STREAM_DECODER_H
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#define FLAC__PROTECTED__SEEKABLE_STREAM_DECODER_H
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#include "FLAC/seekable_stream_decoder.h"
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typedef struct FLAC__SeekableStreamDecoderProtected {
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||||||
|
FLAC__bool md5_checking; /* if true, generate MD5 signature of decoded data and compare against signature in the Encoding metadata block */
|
||||||
|
FLAC__SeekableStreamDecoderState state;
|
||||||
|
} FLAC__SeekableStreamDecoderProtected;
|
||||||
|
|
||||||
|
#endif
|
||||||
|
|
@ -0,0 +1,716 @@
|
||||||
|
/* 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.
|
||||||
|
*/
|
||||||
|
|
||||||
|
#include <stdio.h>
|
||||||
|
#include <stdlib.h> /* for malloc() */
|
||||||
|
#include "FLAC/assert.h"
|
||||||
|
#include "protected/seekable_stream_decoder.h"
|
||||||
|
#include "protected/stream_decoder.h"
|
||||||
|
#include "private/md5.h"
|
||||||
|
|
||||||
|
/***********************************************************************
|
||||||
|
*
|
||||||
|
* Private class method prototypes
|
||||||
|
*
|
||||||
|
***********************************************************************/
|
||||||
|
|
||||||
|
static FLAC__StreamDecoderReadStatus read_callback_(const FLAC__StreamDecoder *decoder, FLAC__byte buffer[], unsigned *bytes, void *client_data);
|
||||||
|
static FLAC__StreamDecoderWriteStatus write_callback_(const FLAC__StreamDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 *buffer[], void *client_data);
|
||||||
|
static void metadata_callback_(const FLAC__StreamDecoder *decoder, const FLAC__StreamMetaData *metadata, void *client_data);
|
||||||
|
static void error_callback_(const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data);
|
||||||
|
static FLAC__bool seek_to_absolute_sample_(FLAC__SeekableStreamDecoder *decoder, FLAC__uint64 stream_length, FLAC__uint64 target_sample);
|
||||||
|
|
||||||
|
/***********************************************************************
|
||||||
|
*
|
||||||
|
* Private class data
|
||||||
|
*
|
||||||
|
***********************************************************************/
|
||||||
|
|
||||||
|
typedef struct FLAC__SeekableStreamDecoderPrivate {
|
||||||
|
FLAC__SeekableStreamDecoderReadStatus (*read_callback)(const FLAC__SeekableStreamDecoder *decoder, FLAC__byte buffer[], unsigned *bytes, void *client_data);
|
||||||
|
FLAC__SeekableStreamDecoderSeekStatus (*seek_callback)(const FLAC__SeekableStreamDecoder *decoder, FLAC__uint64 absolute_byte_offset, void *client_data);
|
||||||
|
FLAC__SeekableStreamDecoderTellStatus (*tell_callback)(const FLAC__SeekableStreamDecoder *decoder, FLAC__uint64 *absolute_byte_offset, void *client_data);
|
||||||
|
FLAC__SeekableStreamDecoderLengthStatus (*length_callback)(const FLAC__SeekableStreamDecoder *decoder, FLAC__uint64 *stream_length, void *client_data);
|
||||||
|
FLAC__bool (*eof_callback)(const FLAC__SeekableStreamDecoder *decoder, void *client_data);
|
||||||
|
FLAC__StreamDecoderWriteStatus (*write_callback)(const FLAC__SeekableStreamDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 *buffer[], void *client_data);
|
||||||
|
void (*metadata_callback)(const FLAC__SeekableStreamDecoder *decoder, const FLAC__StreamMetaData *metadata, void *client_data);
|
||||||
|
void (*error_callback)(const FLAC__SeekableStreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data);
|
||||||
|
void *client_data;
|
||||||
|
FLAC__StreamDecoder *stream_decoder;
|
||||||
|
struct MD5Context md5context;
|
||||||
|
FLAC__byte stored_md5sum[16]; /* this is what is stored in the metadata */
|
||||||
|
FLAC__byte computed_md5sum[16]; /* this is the sum we computed from the decoded data */
|
||||||
|
/* the rest of these are only used for seeking: */
|
||||||
|
FLAC__StreamMetaData_StreamInfo stream_info; /* we keep this around so we can figure out how to seek quickly */
|
||||||
|
const FLAC__StreamMetaData_SeekTable *seek_table; /* we hold a pointer to the stream decoder's seek table for the same reason */
|
||||||
|
FLAC__Frame last_frame; /* holds the info of the last frame we seeked to */
|
||||||
|
FLAC__uint64 target_sample;
|
||||||
|
} FLAC__SeekableStreamDecoderPrivate;
|
||||||
|
|
||||||
|
/***********************************************************************
|
||||||
|
*
|
||||||
|
* Public static class data
|
||||||
|
*
|
||||||
|
***********************************************************************/
|
||||||
|
|
||||||
|
const char *FLAC__SeekableStreamDecoderStateString[] = {
|
||||||
|
"FLAC__SEEKABLE_STREAM_DECODER_OK",
|
||||||
|
"FLAC__SEEKABLE_STREAM_DECODER_SEEKING",
|
||||||
|
"FLAC__SEEKABLE_STREAM_DECODER_END_OF_STREAM",
|
||||||
|
"FLAC__SEEKABLE_STREAM_DECODER_MEMORY_ALLOCATION_ERROR",
|
||||||
|
"FLAC__SEEKABLE_STREAM_DECODER_STREAM_ERROR",
|
||||||
|
"FLAC__SEEKABLE_STREAM_DECODER_READ_ERROR",
|
||||||
|
"FLAC__SEEKABLE_STREAM_DECODER_SEEK_ERROR",
|
||||||
|
"FLAC__SEEKABLE_STREAM_DECODER_ALREADY_INITIALIZED",
|
||||||
|
"FLAC__SEEKABLE_STREAM_DECODER_INVALID_CALLBACK",
|
||||||
|
"FLAC__SEEKABLE_STREAM_DECODER_UNINITIALIZED"
|
||||||
|
};
|
||||||
|
|
||||||
|
const char *FLAC__SeekableStreamDecoderReadStatusString[] = {
|
||||||
|
"FLAC__STREAM_DECODER_READ_STATUS_OK",
|
||||||
|
"FLAC__STREAM_DECODER_READ_STATUS_ERROR"
|
||||||
|
};
|
||||||
|
|
||||||
|
const char *FLAC__SeekableStreamDecoderSeekStatusString[] = {
|
||||||
|
"FLAC__STREAM_DECODER_SEEK_STATUS_OK",
|
||||||
|
"FLAC__STREAM_DECODER_SEEK_STATUS_ERROR"
|
||||||
|
};
|
||||||
|
|
||||||
|
const char *FLAC__SeekableStreamDecoderTellStatusString[] = {
|
||||||
|
"FLAC__STREAM_DECODER_TELL_STATUS_OK",
|
||||||
|
"FLAC__STREAM_DECODER_TELL_STATUS_ERROR"
|
||||||
|
};
|
||||||
|
|
||||||
|
const char *FLAC__SeekableStreamDecoderLengthStatusString[] = {
|
||||||
|
"FLAC__STREAM_DECODER_LENGTH_STATUS_OK",
|
||||||
|
"FLAC__STREAM_DECODER_LENGTH_STATUS_ERROR"
|
||||||
|
};
|
||||||
|
|
||||||
|
/***********************************************************************
|
||||||
|
*
|
||||||
|
* Class constructor/destructor
|
||||||
|
*
|
||||||
|
***********************************************************************/
|
||||||
|
|
||||||
|
FLAC__SeekableStreamDecoder *FLAC__seekable_stream_decoder_new()
|
||||||
|
{
|
||||||
|
FLAC__SeekableStreamDecoder *decoder;
|
||||||
|
|
||||||
|
FLAC__ASSERT(sizeof(int) >= 4); /* we want to die right away if this is not true */
|
||||||
|
|
||||||
|
decoder = (FLAC__SeekableStreamDecoder*)malloc(sizeof(FLAC__SeekableStreamDecoder));
|
||||||
|
if(decoder == 0) {
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
decoder->protected_ = (FLAC__SeekableStreamDecoderProtected*)malloc(sizeof(FLAC__SeekableStreamDecoderProtected));
|
||||||
|
if(decoder->protected_ == 0) {
|
||||||
|
free(decoder);
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
decoder->private_ = (FLAC__SeekableStreamDecoderPrivate*)malloc(sizeof(FLAC__SeekableStreamDecoderPrivate));
|
||||||
|
if(decoder->private_ == 0) {
|
||||||
|
free(decoder->protected_);
|
||||||
|
free(decoder);
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
decoder->protected_->state = FLAC__SEEKABLE_STREAM_DECODER_UNINITIALIZED;
|
||||||
|
|
||||||
|
decoder->private_->read_callback = 0;
|
||||||
|
decoder->private_->seek_callback = 0;
|
||||||
|
decoder->private_->tell_callback = 0;
|
||||||
|
decoder->private_->length_callback = 0;
|
||||||
|
decoder->private_->eof_callback = 0;
|
||||||
|
decoder->private_->write_callback = 0;
|
||||||
|
decoder->private_->metadata_callback = 0;
|
||||||
|
decoder->private_->error_callback = 0;
|
||||||
|
decoder->private_->client_data = 0;
|
||||||
|
|
||||||
|
return decoder;
|
||||||
|
}
|
||||||
|
|
||||||
|
void FLAC__seekable_stream_decoder_delete(FLAC__SeekableStreamDecoder *decoder)
|
||||||
|
{
|
||||||
|
FLAC__ASSERT(decoder != 0);
|
||||||
|
FLAC__ASSERT(decoder->protected_ != 0);
|
||||||
|
FLAC__ASSERT(decoder->private_ != 0);
|
||||||
|
|
||||||
|
free(decoder->private_);
|
||||||
|
free(decoder->protected_);
|
||||||
|
free(decoder);
|
||||||
|
}
|
||||||
|
|
||||||
|
/***********************************************************************
|
||||||
|
*
|
||||||
|
* Public class methods
|
||||||
|
*
|
||||||
|
***********************************************************************/
|
||||||
|
|
||||||
|
FLAC__SeekableStreamDecoderState FLAC__seekable_stream_decoder_init(FLAC__SeekableStreamDecoder *decoder)
|
||||||
|
{
|
||||||
|
FLAC__ASSERT(decoder != 0);
|
||||||
|
|
||||||
|
if(decoder->protected_->state != FLAC__SEEKABLE_STREAM_DECODER_UNINITIALIZED)
|
||||||
|
return decoder->protected_->state = FLAC__SEEKABLE_STREAM_DECODER_ALREADY_INITIALIZED;
|
||||||
|
|
||||||
|
decoder->protected_->state = FLAC__SEEKABLE_STREAM_DECODER_OK;
|
||||||
|
|
||||||
|
if(0 == decoder->private_->read_callback || 0 == decoder->private_->seek_callback || 0 == decoder->private_->tell_callback || 0 == decoder->private_->length_callback || 0 == decoder->private_->eof_callback)
|
||||||
|
return decoder->protected_->state = FLAC__SEEKABLE_STREAM_DECODER_INVALID_CALLBACK;
|
||||||
|
|
||||||
|
if(0 == decoder->private_->write_callback || 0 == decoder->private_->metadata_callback || 0 == decoder->private_->error_callback)
|
||||||
|
return decoder->protected_->state = FLAC__SEEKABLE_STREAM_DECODER_INVALID_CALLBACK;
|
||||||
|
|
||||||
|
decoder->private_->stream_decoder = 0;
|
||||||
|
decoder->private_->seek_table = 0;
|
||||||
|
|
||||||
|
/* We initialize the MD5Context even though we may never use it. This is
|
||||||
|
* because md5_checking may be turned on to start and then turned off if a
|
||||||
|
* seek occurs. So we always init the context here and finalize it in
|
||||||
|
* FLAC__seekable_stream_decoder_finish() to make sure things are always
|
||||||
|
* cleaned up properly.
|
||||||
|
*/
|
||||||
|
MD5Init(&decoder->private_->md5context);
|
||||||
|
|
||||||
|
decoder->private_->stream_decoder = FLAC__stream_decoder_new();
|
||||||
|
|
||||||
|
if(0 == decoder->private_->stream_decoder)
|
||||||
|
return decoder->protected_->state = FLAC__SEEKABLE_STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
|
||||||
|
|
||||||
|
FLAC__stream_decoder_set_read_callback(decoder->private_->stream_decoder, read_callback_);
|
||||||
|
FLAC__stream_decoder_set_write_callback(decoder->private_->stream_decoder, write_callback_);
|
||||||
|
FLAC__stream_decoder_set_metadata_callback(decoder->private_->stream_decoder, metadata_callback_);
|
||||||
|
FLAC__stream_decoder_set_error_callback(decoder->private_->stream_decoder, error_callback_);
|
||||||
|
FLAC__stream_decoder_set_client_data(decoder->private_->stream_decoder, decoder);
|
||||||
|
|
||||||
|
if(FLAC__stream_decoder_init(decoder->private_->stream_decoder) != FLAC__STREAM_DECODER_SEARCH_FOR_METADATA)
|
||||||
|
return decoder->protected_->state = FLAC__SEEKABLE_STREAM_DECODER_STREAM_ERROR;
|
||||||
|
|
||||||
|
return decoder->protected_->state;
|
||||||
|
}
|
||||||
|
|
||||||
|
FLAC__bool FLAC__seekable_stream_decoder_finish(FLAC__SeekableStreamDecoder *decoder)
|
||||||
|
{
|
||||||
|
FLAC__bool md5_failed = false;
|
||||||
|
|
||||||
|
FLAC__ASSERT(decoder != 0);
|
||||||
|
if(decoder->protected_->state == FLAC__SEEKABLE_STREAM_DECODER_UNINITIALIZED)
|
||||||
|
return true;
|
||||||
|
/* see the comment in FLAC__seekable_stream_decoder_init() as to why we
|
||||||
|
* always call MD5Final()
|
||||||
|
*/
|
||||||
|
MD5Final(decoder->private_->computed_md5sum, &decoder->private_->md5context);
|
||||||
|
if(decoder->private_->stream_decoder != 0) {
|
||||||
|
FLAC__stream_decoder_finish(decoder->private_->stream_decoder);
|
||||||
|
FLAC__stream_decoder_delete(decoder->private_->stream_decoder);
|
||||||
|
}
|
||||||
|
if(decoder->protected_->md5_checking) {
|
||||||
|
if(memcmp(decoder->private_->stored_md5sum, decoder->private_->computed_md5sum, 16))
|
||||||
|
md5_failed = true;
|
||||||
|
}
|
||||||
|
decoder->protected_->state = FLAC__SEEKABLE_STREAM_DECODER_UNINITIALIZED;
|
||||||
|
return !md5_failed;
|
||||||
|
}
|
||||||
|
|
||||||
|
FLAC__bool FLAC__seekable_stream_decoder_set_md5_checking(const FLAC__SeekableStreamDecoder *decoder, FLAC__bool value)
|
||||||
|
{
|
||||||
|
if(decoder->protected_->state != FLAC__SEEKABLE_STREAM_DECODER_UNINITIALIZED)
|
||||||
|
return false;
|
||||||
|
decoder->protected_->md5_checking = value;
|
||||||
|
return true;
|
||||||
|
}
|
||||||
|
|
||||||
|
FLAC__bool FLAC__seekable_stream_decoder_set_read_callback(const FLAC__SeekableStreamDecoder *decoder, FLAC__SeekableStreamDecoderReadStatus (*value)(const FLAC__SeekableStreamDecoder *decoder, FLAC__byte buffer[], unsigned *bytes, void *client_data))
|
||||||
|
{
|
||||||
|
if(decoder->protected_->state != FLAC__SEEKABLE_STREAM_DECODER_UNINITIALIZED)
|
||||||
|
return false;
|
||||||
|
decoder->private_->read_callback = value;
|
||||||
|
return true;
|
||||||
|
}
|
||||||
|
|
||||||
|
FLAC__bool FLAC__seekable_stream_decoder_set_seek_callback(const FLAC__SeekableStreamDecoder *decoder, FLAC__SeekableStreamDecoderSeekStatus (*value)(const FLAC__SeekableStreamDecoder *decoder, FLAC__uint64 absolute_byte_offset, void *client_data))
|
||||||
|
{
|
||||||
|
if(decoder->protected_->state != FLAC__SEEKABLE_STREAM_DECODER_UNINITIALIZED)
|
||||||
|
return false;
|
||||||
|
decoder->private_->seek_callback = value;
|
||||||
|
return true;
|
||||||
|
}
|
||||||
|
|
||||||
|
FLAC__bool FLAC__seekable_stream_decoder_set_tell_callback(const FLAC__SeekableStreamDecoder *decoder, FLAC__SeekableStreamDecoderTellStatus (*value)(const FLAC__SeekableStreamDecoder *decoder, FLAC__uint64 *absolute_byte_offset, void *client_data))
|
||||||
|
{
|
||||||
|
if(decoder->protected_->state != FLAC__SEEKABLE_STREAM_DECODER_UNINITIALIZED)
|
||||||
|
return false;
|
||||||
|
decoder->private_->tell_callback = value;
|
||||||
|
return true;
|
||||||
|
}
|
||||||
|
|
||||||
|
FLAC__bool FLAC__seekable_stream_decoder_set_length_callback(const FLAC__SeekableStreamDecoder *decoder, FLAC__SeekableStreamDecoderLengthStatus (*value)(const FLAC__SeekableStreamDecoder *decoder, FLAC__uint64 *stream_length, void *client_data))
|
||||||
|
{
|
||||||
|
if(decoder->protected_->state != FLAC__SEEKABLE_STREAM_DECODER_UNINITIALIZED)
|
||||||
|
return false;
|
||||||
|
decoder->private_->length_callback = value;
|
||||||
|
return true;
|
||||||
|
}
|
||||||
|
|
||||||
|
FLAC__bool FLAC__seekable_stream_decoder_set_eof_callback(const FLAC__SeekableStreamDecoder *decoder, FLAC__bool (*value)(const FLAC__SeekableStreamDecoder *decoder, void *client_data))
|
||||||
|
{
|
||||||
|
if(decoder->protected_->state != FLAC__SEEKABLE_STREAM_DECODER_UNINITIALIZED)
|
||||||
|
return false;
|
||||||
|
decoder->private_->eof_callback = value;
|
||||||
|
return true;
|
||||||
|
}
|
||||||
|
|
||||||
|
FLAC__bool FLAC__seekable_stream_decoder_set_write_callback(const FLAC__SeekableStreamDecoder *decoder, FLAC__StreamDecoderWriteStatus (*value)(const FLAC__SeekableStreamDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 *buffer[], void *client_data))
|
||||||
|
{
|
||||||
|
if(decoder->protected_->state != FLAC__SEEKABLE_STREAM_DECODER_UNINITIALIZED)
|
||||||
|
return false;
|
||||||
|
decoder->private_->write_callback = value;
|
||||||
|
return true;
|
||||||
|
}
|
||||||
|
|
||||||
|
FLAC__bool FLAC__seekable_stream_decoder_set_metadata_callback(const FLAC__SeekableStreamDecoder *decoder, void (*value)(const FLAC__SeekableStreamDecoder *decoder, const FLAC__StreamMetaData *metadata, void *client_data))
|
||||||
|
{
|
||||||
|
if(decoder->protected_->state != FLAC__SEEKABLE_STREAM_DECODER_UNINITIALIZED)
|
||||||
|
return false;
|
||||||
|
decoder->private_->metadata_callback = value;
|
||||||
|
return true;
|
||||||
|
}
|
||||||
|
|
||||||
|
FLAC__bool FLAC__seekable_stream_decoder_set_error_callback(const FLAC__SeekableStreamDecoder *decoder, void (*value)(const FLAC__SeekableStreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data))
|
||||||
|
{
|
||||||
|
if(decoder->protected_->state != FLAC__SEEKABLE_STREAM_DECODER_UNINITIALIZED)
|
||||||
|
return false;
|
||||||
|
decoder->private_->error_callback = value;
|
||||||
|
return true;
|
||||||
|
}
|
||||||
|
|
||||||
|
FLAC__bool FLAC__seekable_stream_decoder_set_client_data(const FLAC__SeekableStreamDecoder *decoder, void *value)
|
||||||
|
{
|
||||||
|
if(decoder->protected_->state != FLAC__SEEKABLE_STREAM_DECODER_UNINITIALIZED)
|
||||||
|
return false;
|
||||||
|
decoder->private_->client_data = value;
|
||||||
|
return true;
|
||||||
|
}
|
||||||
|
|
||||||
|
FLAC__SeekableStreamDecoderState FLAC__seekable_stream_decoder_get_state(const FLAC__SeekableStreamDecoder *decoder)
|
||||||
|
{
|
||||||
|
return decoder->protected_->state;
|
||||||
|
}
|
||||||
|
|
||||||
|
FLAC__bool FLAC__seekable_stream_decoder_get_md5_checking(const FLAC__SeekableStreamDecoder *decoder)
|
||||||
|
{
|
||||||
|
return decoder->protected_->md5_checking;
|
||||||
|
}
|
||||||
|
|
||||||
|
FLAC__bool FLAC__seekable_stream_decoder_process_whole_stream(FLAC__SeekableStreamDecoder *decoder)
|
||||||
|
{
|
||||||
|
FLAC__bool ret;
|
||||||
|
FLAC__ASSERT(decoder != 0);
|
||||||
|
|
||||||
|
if(decoder->private_->stream_decoder->protected_->state == FLAC__STREAM_DECODER_END_OF_STREAM)
|
||||||
|
decoder->protected_->state = FLAC__SEEKABLE_STREAM_DECODER_END_OF_STREAM;
|
||||||
|
|
||||||
|
if(decoder->protected_->state == FLAC__SEEKABLE_STREAM_DECODER_END_OF_STREAM)
|
||||||
|
return true;
|
||||||
|
|
||||||
|
FLAC__ASSERT(decoder->protected_->state == FLAC__SEEKABLE_STREAM_DECODER_OK);
|
||||||
|
|
||||||
|
ret = FLAC__stream_decoder_process_whole_stream(decoder->private_->stream_decoder);
|
||||||
|
if(!ret)
|
||||||
|
decoder->protected_->state = FLAC__SEEKABLE_STREAM_DECODER_STREAM_ERROR;
|
||||||
|
|
||||||
|
return ret;
|
||||||
|
}
|
||||||
|
|
||||||
|
FLAC__bool FLAC__seekable_stream_decoder_process_metadata(FLAC__SeekableStreamDecoder *decoder)
|
||||||
|
{
|
||||||
|
FLAC__bool ret;
|
||||||
|
FLAC__ASSERT(decoder != 0);
|
||||||
|
|
||||||
|
if(decoder->private_->stream_decoder->protected_->state == FLAC__STREAM_DECODER_END_OF_STREAM)
|
||||||
|
decoder->protected_->state = FLAC__SEEKABLE_STREAM_DECODER_END_OF_STREAM;
|
||||||
|
|
||||||
|
if(decoder->protected_->state == FLAC__SEEKABLE_STREAM_DECODER_END_OF_STREAM)
|
||||||
|
return true;
|
||||||
|
|
||||||
|
FLAC__ASSERT(decoder->protected_->state == FLAC__SEEKABLE_STREAM_DECODER_OK);
|
||||||
|
|
||||||
|
ret = FLAC__stream_decoder_process_metadata(decoder->private_->stream_decoder);
|
||||||
|
if(!ret)
|
||||||
|
decoder->protected_->state = FLAC__SEEKABLE_STREAM_DECODER_STREAM_ERROR;
|
||||||
|
|
||||||
|
return ret;
|
||||||
|
}
|
||||||
|
|
||||||
|
FLAC__bool FLAC__seekable_stream_decoder_process_one_frame(FLAC__SeekableStreamDecoder *decoder)
|
||||||
|
{
|
||||||
|
FLAC__bool ret;
|
||||||
|
FLAC__ASSERT(decoder != 0);
|
||||||
|
|
||||||
|
if(decoder->private_->stream_decoder->protected_->state == FLAC__STREAM_DECODER_END_OF_STREAM)
|
||||||
|
decoder->protected_->state = FLAC__SEEKABLE_STREAM_DECODER_END_OF_STREAM;
|
||||||
|
|
||||||
|
if(decoder->protected_->state == FLAC__SEEKABLE_STREAM_DECODER_END_OF_STREAM)
|
||||||
|
return true;
|
||||||
|
|
||||||
|
FLAC__ASSERT(decoder->protected_->state == FLAC__SEEKABLE_STREAM_DECODER_OK);
|
||||||
|
|
||||||
|
ret = FLAC__stream_decoder_process_one_frame(decoder->private_->stream_decoder);
|
||||||
|
if(!ret)
|
||||||
|
decoder->protected_->state = FLAC__SEEKABLE_STREAM_DECODER_STREAM_ERROR;
|
||||||
|
|
||||||
|
return ret;
|
||||||
|
}
|
||||||
|
|
||||||
|
FLAC__bool FLAC__seekable_stream_decoder_process_remaining_frames(FLAC__SeekableStreamDecoder *decoder)
|
||||||
|
{
|
||||||
|
FLAC__bool ret;
|
||||||
|
FLAC__ASSERT(decoder != 0);
|
||||||
|
|
||||||
|
if(decoder->private_->stream_decoder->protected_->state == FLAC__STREAM_DECODER_END_OF_STREAM)
|
||||||
|
decoder->protected_->state = FLAC__SEEKABLE_STREAM_DECODER_END_OF_STREAM;
|
||||||
|
|
||||||
|
if(decoder->protected_->state == FLAC__SEEKABLE_STREAM_DECODER_END_OF_STREAM)
|
||||||
|
return true;
|
||||||
|
|
||||||
|
FLAC__ASSERT(decoder->protected_->state == FLAC__SEEKABLE_STREAM_DECODER_OK);
|
||||||
|
|
||||||
|
ret = FLAC__stream_decoder_process_remaining_frames(decoder->private_->stream_decoder);
|
||||||
|
if(!ret)
|
||||||
|
decoder->protected_->state = FLAC__SEEKABLE_STREAM_DECODER_STREAM_ERROR;
|
||||||
|
|
||||||
|
return ret;
|
||||||
|
}
|
||||||
|
|
||||||
|
FLAC__bool FLAC__seekable_stream_decoder_seek_absolute(FLAC__SeekableStreamDecoder *decoder, FLAC__uint64 sample)
|
||||||
|
{
|
||||||
|
FLAC__uint64 length;
|
||||||
|
|
||||||
|
FLAC__ASSERT(decoder != 0);
|
||||||
|
FLAC__ASSERT(decoder->protected_->state == FLAC__SEEKABLE_STREAM_DECODER_OK);
|
||||||
|
|
||||||
|
decoder->protected_->state = FLAC__SEEKABLE_STREAM_DECODER_SEEKING;
|
||||||
|
|
||||||
|
/* turn off md5 checking if a seek is attempted */
|
||||||
|
decoder->protected_->md5_checking = false;
|
||||||
|
|
||||||
|
if(!FLAC__stream_decoder_reset(decoder->private_->stream_decoder)) {
|
||||||
|
decoder->protected_->state = FLAC__SEEKABLE_STREAM_DECODER_STREAM_ERROR;
|
||||||
|
return false;
|
||||||
|
}
|
||||||
|
/* get the file length */
|
||||||
|
if(decoder->private_->length_callback(decoder, &length, decoder->private_->client_data) != FLAC__SEEKABLE_STREAM_DECODER_LENGTH_STATUS_OK) {
|
||||||
|
decoder->protected_->state = FLAC__SEEKABLE_STREAM_DECODER_SEEK_ERROR;
|
||||||
|
return false;
|
||||||
|
}
|
||||||
|
/* rewind */
|
||||||
|
if(decoder->private_->seek_callback(decoder, 0, decoder->private_->client_data) != FLAC__SEEKABLE_STREAM_DECODER_SEEK_STATUS_OK) {
|
||||||
|
decoder->protected_->state = FLAC__SEEKABLE_STREAM_DECODER_SEEK_ERROR;
|
||||||
|
return false;
|
||||||
|
}
|
||||||
|
if(!FLAC__stream_decoder_process_metadata(decoder->private_->stream_decoder)) {
|
||||||
|
decoder->protected_->state = FLAC__SEEKABLE_STREAM_DECODER_STREAM_ERROR;
|
||||||
|
return false;
|
||||||
|
}
|
||||||
|
if(sample > decoder->private_->stream_info.total_samples) {
|
||||||
|
decoder->protected_->state = FLAC__SEEKABLE_STREAM_DECODER_SEEK_ERROR;
|
||||||
|
return false;
|
||||||
|
}
|
||||||
|
|
||||||
|
return seek_to_absolute_sample_(decoder, length, sample);
|
||||||
|
}
|
||||||
|
|
||||||
|
/***********************************************************************
|
||||||
|
*
|
||||||
|
* Private class methods
|
||||||
|
*
|
||||||
|
***********************************************************************/
|
||||||
|
|
||||||
|
FLAC__StreamDecoderReadStatus read_callback_(const FLAC__StreamDecoder *decoder, FLAC__byte buffer[], unsigned *bytes, void *client_data)
|
||||||
|
{
|
||||||
|
FLAC__SeekableStreamDecoder *seekable_stream_decoder = (FLAC__SeekableStreamDecoder *)client_data;
|
||||||
|
(void)decoder;
|
||||||
|
if(seekable_stream_decoder->private_->eof_callback(seekable_stream_decoder, seekable_stream_decoder->private_->client_data)) {
|
||||||
|
seekable_stream_decoder->protected_->state = FLAC__SEEKABLE_STREAM_DECODER_END_OF_STREAM;
|
||||||
|
return FLAC__STREAM_DECODER_READ_END_OF_STREAM;
|
||||||
|
}
|
||||||
|
else if(*bytes > 0) {
|
||||||
|
unsigned bytes_read = *bytes;
|
||||||
|
if(seekable_stream_decoder->private_->read_callback(seekable_stream_decoder, buffer, &bytes_read, seekable_stream_decoder->private_->client_data) != FLAC__SEEKABLE_STREAM_DECODER_READ_STATUS_OK) {
|
||||||
|
seekable_stream_decoder->protected_->state = FLAC__SEEKABLE_STREAM_DECODER_READ_ERROR;
|
||||||
|
return FLAC__STREAM_DECODER_READ_ABORT;
|
||||||
|
}
|
||||||
|
if(bytes_read == 0) {
|
||||||
|
if(seekable_stream_decoder->private_->eof_callback(seekable_stream_decoder, seekable_stream_decoder->private_->client_data)) {
|
||||||
|
seekable_stream_decoder->protected_->state = FLAC__SEEKABLE_STREAM_DECODER_END_OF_STREAM;
|
||||||
|
return FLAC__STREAM_DECODER_READ_END_OF_STREAM;
|
||||||
|
}
|
||||||
|
else
|
||||||
|
return FLAC__STREAM_DECODER_READ_CONTINUE;
|
||||||
|
}
|
||||||
|
else {
|
||||||
|
*bytes = bytes_read;
|
||||||
|
return FLAC__STREAM_DECODER_READ_CONTINUE;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
else
|
||||||
|
return FLAC__STREAM_DECODER_READ_ABORT; /* abort to avoid a deadlock */
|
||||||
|
}
|
||||||
|
|
||||||
|
FLAC__StreamDecoderWriteStatus write_callback_(const FLAC__StreamDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 *buffer[], void *client_data)
|
||||||
|
{
|
||||||
|
FLAC__SeekableStreamDecoder *seekable_stream_decoder = (FLAC__SeekableStreamDecoder *)client_data;
|
||||||
|
(void)decoder;
|
||||||
|
|
||||||
|
if(seekable_stream_decoder->protected_->state == FLAC__SEEKABLE_STREAM_DECODER_SEEKING) {
|
||||||
|
FLAC__uint64 this_frame_sample = frame->header.number.sample_number;
|
||||||
|
FLAC__uint64 next_frame_sample = this_frame_sample + (FLAC__uint64)frame->header.blocksize;
|
||||||
|
FLAC__uint64 target_sample = seekable_stream_decoder->private_->target_sample;
|
||||||
|
|
||||||
|
FLAC__ASSERT(frame->header.number_type == FLAC__FRAME_NUMBER_TYPE_SAMPLE_NUMBER);
|
||||||
|
|
||||||
|
seekable_stream_decoder->private_->last_frame = *frame; /* save the frame */
|
||||||
|
if(this_frame_sample <= target_sample && target_sample < next_frame_sample) { /* we hit our target frame */
|
||||||
|
unsigned delta = (unsigned)(target_sample - this_frame_sample);
|
||||||
|
/* kick out of seek mode */
|
||||||
|
seekable_stream_decoder->protected_->state = FLAC__SEEKABLE_STREAM_DECODER_OK;
|
||||||
|
/* shift out the samples before target_sample */
|
||||||
|
if(delta > 0) {
|
||||||
|
unsigned channel;
|
||||||
|
const FLAC__int32 *newbuffer[FLAC__MAX_CHANNELS];
|
||||||
|
for(channel = 0; channel < frame->header.channels; channel++)
|
||||||
|
newbuffer[channel] = buffer[channel] + delta;
|
||||||
|
seekable_stream_decoder->private_->last_frame.header.blocksize -= delta;
|
||||||
|
seekable_stream_decoder->private_->last_frame.header.number.sample_number += (FLAC__uint64)delta;
|
||||||
|
/* write the relevant samples */
|
||||||
|
return seekable_stream_decoder->private_->write_callback(seekable_stream_decoder, &seekable_stream_decoder->private_->last_frame, newbuffer, seekable_stream_decoder->private_->client_data);
|
||||||
|
}
|
||||||
|
else {
|
||||||
|
/* write the relevant samples */
|
||||||
|
return seekable_stream_decoder->private_->write_callback(seekable_stream_decoder, frame, buffer, seekable_stream_decoder->private_->client_data);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
else {
|
||||||
|
return FLAC__STREAM_DECODER_WRITE_CONTINUE;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
else {
|
||||||
|
if(seekable_stream_decoder->protected_->md5_checking) {
|
||||||
|
if(!FLAC__MD5Accumulate(&seekable_stream_decoder->private_->md5context, buffer, frame->header.channels, frame->header.blocksize, (frame->header.bits_per_sample+7) / 8))
|
||||||
|
return FLAC__STREAM_DECODER_WRITE_ABORT;
|
||||||
|
}
|
||||||
|
return seekable_stream_decoder->private_->write_callback(seekable_stream_decoder, frame, buffer, seekable_stream_decoder->private_->client_data);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
void metadata_callback_(const FLAC__StreamDecoder *decoder, const FLAC__StreamMetaData *metadata, void *client_data)
|
||||||
|
{
|
||||||
|
FLAC__SeekableStreamDecoder *seekable_stream_decoder = (FLAC__SeekableStreamDecoder *)client_data;
|
||||||
|
(void)decoder;
|
||||||
|
|
||||||
|
if(metadata->type == FLAC__METADATA_TYPE_STREAMINFO) {
|
||||||
|
seekable_stream_decoder->private_->stream_info = metadata->data.stream_info;
|
||||||
|
/* save the MD5 signature for comparison later */
|
||||||
|
memcpy(seekable_stream_decoder->private_->stored_md5sum, metadata->data.stream_info.md5sum, 16);
|
||||||
|
if(0 == memcmp(seekable_stream_decoder->private_->stored_md5sum, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 16))
|
||||||
|
seekable_stream_decoder->protected_->md5_checking = false;
|
||||||
|
}
|
||||||
|
else if(metadata->type == FLAC__METADATA_TYPE_SEEKTABLE) {
|
||||||
|
seekable_stream_decoder->private_->seek_table = &metadata->data.seek_table;
|
||||||
|
}
|
||||||
|
|
||||||
|
if(seekable_stream_decoder->protected_->state != FLAC__SEEKABLE_STREAM_DECODER_SEEKING)
|
||||||
|
seekable_stream_decoder->private_->metadata_callback(seekable_stream_decoder, metadata, seekable_stream_decoder->private_->client_data);
|
||||||
|
}
|
||||||
|
|
||||||
|
void error_callback_(const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status, void *client_data)
|
||||||
|
{
|
||||||
|
FLAC__SeekableStreamDecoder *seekable_stream_decoder = (FLAC__SeekableStreamDecoder *)client_data;
|
||||||
|
(void)decoder;
|
||||||
|
|
||||||
|
if(seekable_stream_decoder->protected_->state != FLAC__SEEKABLE_STREAM_DECODER_SEEKING)
|
||||||
|
seekable_stream_decoder->private_->error_callback(seekable_stream_decoder, status, seekable_stream_decoder->private_->client_data);
|
||||||
|
}
|
||||||
|
|
||||||
|
FLAC__bool seek_to_absolute_sample_(FLAC__SeekableStreamDecoder *decoder, FLAC__uint64 stream_length, FLAC__uint64 target_sample)
|
||||||
|
{
|
||||||
|
FLAC__uint64 first_frame_offset, lower_bound, upper_bound;
|
||||||
|
FLAC__int64 pos = -1, last_pos = -1;
|
||||||
|
int i, lower_seek_point = -1, upper_seek_point = -1;
|
||||||
|
unsigned approx_bytes_per_frame;
|
||||||
|
FLAC__uint64 last_frame_sample = 0xffffffffffffffff;
|
||||||
|
FLAC__bool needs_seek;
|
||||||
|
const FLAC__bool is_variable_blocksize_stream = (decoder->private_->stream_info.min_blocksize != decoder->private_->stream_info.max_blocksize);
|
||||||
|
|
||||||
|
/* we are just guessing here, but we want to guess high, not low */
|
||||||
|
if(decoder->private_->stream_info.max_framesize > 0) {
|
||||||
|
approx_bytes_per_frame = decoder->private_->stream_info.max_framesize;
|
||||||
|
}
|
||||||
|
else if(!is_variable_blocksize_stream) {
|
||||||
|
/* note there are no () around 'decoder->private_->stream_info.bits_per_sample/8' to keep precision up since it's an integer calulation */
|
||||||
|
approx_bytes_per_frame = decoder->private_->stream_info.min_blocksize * decoder->private_->stream_info.channels * decoder->private_->stream_info.bits_per_sample/8 + 64;
|
||||||
|
}
|
||||||
|
else
|
||||||
|
approx_bytes_per_frame = 1152 * decoder->private_->stream_info.channels * decoder->private_->stream_info.bits_per_sample/8 + 64;
|
||||||
|
|
||||||
|
/*
|
||||||
|
* The stream position is currently at the first frame plus any read
|
||||||
|
* ahead data, so first we get the stream position, then subtract
|
||||||
|
* uncomsumed bytes to get the position of the first frame in the
|
||||||
|
* stream.
|
||||||
|
*/
|
||||||
|
if(decoder->private_->tell_callback(decoder, &first_frame_offset, decoder->private_->client_data) != FLAC__SEEKABLE_STREAM_DECODER_TELL_STATUS_OK) {
|
||||||
|
decoder->protected_->state = FLAC__SEEKABLE_STREAM_DECODER_SEEK_ERROR;
|
||||||
|
return false;
|
||||||
|
}
|
||||||
|
FLAC__ASSERT(first_frame_offset >= FLAC__stream_decoder_get_input_bytes_unconsumed(decoder->private_->stream_decoder));
|
||||||
|
first_frame_offset -= FLAC__stream_decoder_get_input_bytes_unconsumed(decoder->private_->stream_decoder);
|
||||||
|
|
||||||
|
/*
|
||||||
|
* First, we set an upper and lower bound on where in the
|
||||||
|
* stream we will search. For now we assume the worst case
|
||||||
|
* scenario, which is our best guess at the beginning of
|
||||||
|
* the first and last frames.
|
||||||
|
*/
|
||||||
|
lower_bound = first_frame_offset;
|
||||||
|
|
||||||
|
/* calc the upper_bound, beyond which we never want to seek */
|
||||||
|
if(decoder->private_->stream_info.max_framesize > 0)
|
||||||
|
upper_bound = stream_length - (decoder->private_->stream_info.max_framesize + 128 + 2); /* 128 for a possible ID3V1 tag, 2 for indexing differences */
|
||||||
|
else
|
||||||
|
upper_bound = stream_length - ((decoder->private_->stream_info.channels * decoder->private_->stream_info.bits_per_sample * FLAC__MAX_BLOCK_SIZE) / 8 + 128 + 2);
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Now we refine the bounds if we have a seektable with
|
||||||
|
* suitable points. Note that according to the spec they
|
||||||
|
* must be ordered by ascending sample number.
|
||||||
|
*/
|
||||||
|
if(0 != decoder->private_->seek_table) {
|
||||||
|
/* find the closest seek point <= target_sample, if it exists */
|
||||||
|
for(i = (int)decoder->private_->seek_table->num_points - 1; i >= 0; i--) {
|
||||||
|
if(decoder->private_->seek_table->points[i].sample_number != FLAC__STREAM_METADATA_SEEKPOINT_PLACEHOLDER && decoder->private_->seek_table->points[i].sample_number <= target_sample)
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
if(i >= 0) { /* i.e. we found a suitable seek point... */
|
||||||
|
lower_bound = first_frame_offset + decoder->private_->seek_table->points[i].stream_offset;
|
||||||
|
lower_seek_point = i;
|
||||||
|
}
|
||||||
|
|
||||||
|
/* find the closest seek point > target_sample, if it exists */
|
||||||
|
for(i = 0; i < (int)decoder->private_->seek_table->num_points; i++) {
|
||||||
|
if(decoder->private_->seek_table->points[i].sample_number != FLAC__STREAM_METADATA_SEEKPOINT_PLACEHOLDER && decoder->private_->seek_table->points[i].sample_number > target_sample)
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
if(i < (int)decoder->private_->seek_table->num_points) { /* i.e. we found a suitable seek point... */
|
||||||
|
upper_bound = first_frame_offset + decoder->private_->seek_table->points[i].stream_offset;
|
||||||
|
upper_seek_point = i;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
/*
|
||||||
|
* Now guess at where within those bounds our target
|
||||||
|
* sample will be.
|
||||||
|
*/
|
||||||
|
if(lower_seek_point >= 0) {
|
||||||
|
/* first see if our sample is within a few frames of the lower seekpoint */
|
||||||
|
if(decoder->private_->seek_table->points[lower_seek_point].sample_number <= target_sample && target_sample < decoder->private_->seek_table->points[lower_seek_point].sample_number + (decoder->private_->seek_table->points[lower_seek_point].frame_samples * 4)) {
|
||||||
|
pos = (FLAC__int64)lower_bound;
|
||||||
|
}
|
||||||
|
else if(upper_seek_point >= 0) {
|
||||||
|
const FLAC__uint64 target_offset = target_sample - decoder->private_->seek_table->points[lower_seek_point].sample_number;
|
||||||
|
const FLAC__uint64 range_samples = decoder->private_->seek_table->points[upper_seek_point].sample_number - decoder->private_->seek_table->points[lower_seek_point].sample_number;
|
||||||
|
const FLAC__uint64 range_bytes = upper_bound - lower_bound;
|
||||||
|
#ifdef _MSC_VER
|
||||||
|
/* with VC++ you have to spoon feed it the casting */
|
||||||
|
pos = (FLAC__int64)lower_bound + (FLAC__int64)((double)(FLAC__int64)target_offset / (double)(FLAC__int64)range_samples * (double)(FLAC__int64)(range_bytes-1)) - approx_bytes_per_frame;
|
||||||
|
#else
|
||||||
|
pos = (FLAC__int64)lower_bound + (FLAC__int64)((double)target_offset / (double)range_samples * (double)(range_bytes-1)) - approx_bytes_per_frame;
|
||||||
|
#endif
|
||||||
|
}
|
||||||
|
}
|
||||||
|
if(pos < 0) {
|
||||||
|
/* We need to use the metadata and the filelength to estimate the position of the frame with the correct sample */
|
||||||
|
#ifdef _MSC_VER
|
||||||
|
/* with VC++ you have to spoon feed it the casting */
|
||||||
|
pos = (FLAC__int64)first_frame_offset + (FLAC__int64)((double)(FLAC__int64)target_sample / (double)(FLAC__int64)decoder->private_->stream_info.total_samples * (double)(FLAC__int64)(stream_length-first_frame_offset-1)) - approx_bytes_per_frame;
|
||||||
|
#else
|
||||||
|
pos = (FLAC__int64)first_frame_offset + (FLAC__int64)((double)target_sample / (double)decoder->private_->stream_info.total_samples * (double)(stream_length-first_frame_offset-1)) - approx_bytes_per_frame;
|
||||||
|
#endif
|
||||||
|
}
|
||||||
|
|
||||||
|
/* clip the position to the bounds, lower bound takes precedence */
|
||||||
|
if(pos >= (FLAC__int64)upper_bound)
|
||||||
|
pos = (FLAC__int64)upper_bound-1;
|
||||||
|
if(pos < (FLAC__int64)lower_bound)
|
||||||
|
pos = (FLAC__int64)lower_bound;
|
||||||
|
needs_seek = true;
|
||||||
|
|
||||||
|
decoder->private_->target_sample = target_sample;
|
||||||
|
while(1) {
|
||||||
|
if(needs_seek) {
|
||||||
|
if(decoder->private_->seek_callback(decoder, (FLAC__uint64)pos, decoder->private_->client_data) != FLAC__SEEKABLE_STREAM_DECODER_SEEK_STATUS_OK) {
|
||||||
|
decoder->protected_->state = FLAC__SEEKABLE_STREAM_DECODER_SEEK_ERROR;
|
||||||
|
return false;
|
||||||
|
}
|
||||||
|
if(!FLAC__stream_decoder_flush(decoder->private_->stream_decoder)) {
|
||||||
|
decoder->protected_->state = FLAC__SEEKABLE_STREAM_DECODER_STREAM_ERROR;
|
||||||
|
return false;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
if(!FLAC__stream_decoder_process_one_frame(decoder->private_->stream_decoder)) {
|
||||||
|
decoder->protected_->state = FLAC__SEEKABLE_STREAM_DECODER_SEEK_ERROR;
|
||||||
|
return false;
|
||||||
|
}
|
||||||
|
/* our write callback will change the state when it gets to the target frame */
|
||||||
|
if(decoder->protected_->state != FLAC__SEEKABLE_STREAM_DECODER_SEEKING) {
|
||||||
|
break;
|
||||||
|
}
|
||||||
|
else { /* we need to narrow the search */
|
||||||
|
FLAC__uint64 this_frame_sample = decoder->private_->last_frame.header.number.sample_number;
|
||||||
|
FLAC__ASSERT(decoder->private_->last_frame.header.number_type == FLAC__FRAME_NUMBER_TYPE_SAMPLE_NUMBER);
|
||||||
|
if(this_frame_sample == last_frame_sample) {
|
||||||
|
/* our last move backwards wasn't big enough */
|
||||||
|
pos -= (last_pos - pos);
|
||||||
|
needs_seek = true;
|
||||||
|
}
|
||||||
|
else {
|
||||||
|
if(target_sample < this_frame_sample) {
|
||||||
|
last_pos = pos;
|
||||||
|
approx_bytes_per_frame = decoder->private_->last_frame.header.blocksize * decoder->private_->last_frame.header.channels * decoder->private_->last_frame.header.bits_per_sample/8 + 64;
|
||||||
|
pos -= approx_bytes_per_frame;
|
||||||
|
needs_seek = true;
|
||||||
|
}
|
||||||
|
else { /* target_sample >= this_frame_sample + this frame's blocksize */
|
||||||
|
last_pos = pos;
|
||||||
|
if(decoder->private_->tell_callback(decoder, (FLAC__uint64*)(&pos), decoder->private_->client_data) != FLAC__SEEKABLE_STREAM_DECODER_TELL_STATUS_OK) {
|
||||||
|
decoder->protected_->state = FLAC__SEEKABLE_STREAM_DECODER_SEEK_ERROR;
|
||||||
|
return false;
|
||||||
|
}
|
||||||
|
pos -= FLAC__stream_decoder_get_input_bytes_unconsumed(decoder->private_->stream_decoder);
|
||||||
|
needs_seek = false;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
if(pos < (FLAC__int64)lower_bound)
|
||||||
|
pos = (FLAC__int64)lower_bound;
|
||||||
|
last_frame_sample = this_frame_sample;
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
return true;
|
||||||
|
}
|
||||||
Loading…
Reference in New Issue