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stream_decoder.c
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stream_decoder.c
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/* libFLAC - Free Lossless Audio Codec library
* Copyright (C) 2000-2009 Josh Coalson
* Copyright (C) 2011-2022 Xiph.Org Foundation
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* - Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* - Neither the name of the Xiph.org Foundation nor the names of its
* contributors may be used to endorse or promote products derived from
* this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <stdio.h>
#include <stdlib.h> /* for malloc() */
#include <string.h> /* for memset/memcpy() */
#include <sys/types.h> /* for off_t */
#include <sys/stat.h> /* for stat() */
#include "share/compat.h"
#include "FLAC/assert.h"
#include "share/alloc.h"
#include "protected/stream_decoder.h"
#include "private/bitreader.h"
#include "private/bitmath.h"
#include "private/crc.h"
#include "private/fixed.h"
#include "private/format.h"
#include "private/lpc.h"
#include "private/md5.h"
#include "private/memory.h"
#include "private/macros.h"
/* technically this should be in an "export.c" but this is convenient enough */
FLAC_API int FLAC_API_SUPPORTS_OGG_FLAC = FLAC__HAS_OGG;
/***********************************************************************
*
* Private static data
*
***********************************************************************/
static const FLAC__byte ID3V2_TAG_[3] = { 'I', 'D', '3' };
/***********************************************************************
*
* Private class method prototypes
*
***********************************************************************/
static void set_defaults_(FLAC__StreamDecoder *decoder);
static FILE *get_binary_stdin_(void);
static FLAC__bool allocate_output_(FLAC__StreamDecoder *decoder, uint32_t size, uint32_t channels, uint32_t bps);
static FLAC__bool has_id_filtered_(FLAC__StreamDecoder *decoder, FLAC__byte *id);
static FLAC__bool find_metadata_(FLAC__StreamDecoder *decoder);
static FLAC__bool read_metadata_(FLAC__StreamDecoder *decoder);
static FLAC__bool read_metadata_streaminfo_(FLAC__StreamDecoder *decoder, FLAC__bool is_last, uint32_t length);
static FLAC__bool read_metadata_seektable_(FLAC__StreamDecoder *decoder, FLAC__bool is_last, uint32_t length);
static FLAC__bool read_metadata_vorbiscomment_(FLAC__StreamDecoder *decoder, FLAC__StreamMetadata_VorbisComment *obj, uint32_t length);
static FLAC__bool read_metadata_cuesheet_(FLAC__StreamDecoder *decoder, FLAC__StreamMetadata_CueSheet *obj);
static FLAC__bool read_metadata_picture_(FLAC__StreamDecoder *decoder, FLAC__StreamMetadata_Picture *obj);
static FLAC__bool skip_id3v2_tag_(FLAC__StreamDecoder *decoder);
static FLAC__bool frame_sync_(FLAC__StreamDecoder *decoder);
static FLAC__bool read_frame_(FLAC__StreamDecoder *decoder, FLAC__bool *got_a_frame, FLAC__bool do_full_decode);
static FLAC__bool read_frame_header_(FLAC__StreamDecoder *decoder);
static FLAC__bool read_subframe_(FLAC__StreamDecoder *decoder, uint32_t channel, uint32_t bps, FLAC__bool do_full_decode);
static FLAC__bool read_subframe_constant_(FLAC__StreamDecoder *decoder, uint32_t channel, uint32_t bps, FLAC__bool do_full_decode);
static FLAC__bool read_subframe_fixed_(FLAC__StreamDecoder *decoder, uint32_t channel, uint32_t bps, const uint32_t order, FLAC__bool do_full_decode);
static FLAC__bool read_subframe_lpc_(FLAC__StreamDecoder *decoder, uint32_t channel, uint32_t bps, const uint32_t order, FLAC__bool do_full_decode);
static FLAC__bool read_subframe_verbatim_(FLAC__StreamDecoder *decoder, uint32_t channel, uint32_t bps, FLAC__bool do_full_decode);
static FLAC__bool read_residual_partitioned_rice_(FLAC__StreamDecoder *decoder, uint32_t predictor_order, uint32_t partition_order, FLAC__EntropyCodingMethod_PartitionedRiceContents *partitioned_rice_contents, FLAC__int32 *residual, FLAC__bool is_extended);
static FLAC__bool read_zero_padding_(FLAC__StreamDecoder *decoder);
static void undo_channel_coding(FLAC__StreamDecoder *decoder);
static FLAC__bool read_callback_(FLAC__byte buffer[], size_t *bytes, void *client_data);
#if FLAC__HAS_OGG
static FLAC__StreamDecoderReadStatus read_callback_ogg_aspect_(const FLAC__StreamDecoder *decoder, FLAC__byte buffer[], size_t *bytes);
static FLAC__OggDecoderAspectReadStatus read_callback_proxy_(const void *void_decoder, FLAC__byte buffer[], size_t *bytes, void *client_data);
#endif
static FLAC__StreamDecoderWriteStatus write_audio_frame_to_client_(FLAC__StreamDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 * const buffer[]);
static void send_error_to_client_(const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status);
static FLAC__bool seek_to_absolute_sample_(FLAC__StreamDecoder *decoder, FLAC__uint64 stream_length, FLAC__uint64 target_sample);
#if FLAC__HAS_OGG
static FLAC__bool seek_to_absolute_sample_ogg_(FLAC__StreamDecoder *decoder, FLAC__uint64 stream_length, FLAC__uint64 target_sample);
#endif
static FLAC__StreamDecoderReadStatus file_read_callback_(const FLAC__StreamDecoder *decoder, FLAC__byte buffer[], size_t *bytes, void *client_data);
static FLAC__StreamDecoderSeekStatus file_seek_callback_(const FLAC__StreamDecoder *decoder, FLAC__uint64 absolute_byte_offset, void *client_data);
static FLAC__StreamDecoderTellStatus file_tell_callback_(const FLAC__StreamDecoder *decoder, FLAC__uint64 *absolute_byte_offset, void *client_data);
static FLAC__StreamDecoderLengthStatus file_length_callback_(const FLAC__StreamDecoder *decoder, FLAC__uint64 *stream_length, void *client_data);
static FLAC__bool file_eof_callback_(const FLAC__StreamDecoder *decoder, void *client_data);
/***********************************************************************
*
* Private class data
*
***********************************************************************/
typedef struct FLAC__StreamDecoderPrivate {
FLAC__bool is_ogg;
FLAC__StreamDecoderReadCallback read_callback;
FLAC__StreamDecoderSeekCallback seek_callback;
FLAC__StreamDecoderTellCallback tell_callback;
FLAC__StreamDecoderLengthCallback length_callback;
FLAC__StreamDecoderEofCallback eof_callback;
FLAC__StreamDecoderWriteCallback write_callback;
FLAC__StreamDecoderMetadataCallback metadata_callback;
FLAC__StreamDecoderErrorCallback error_callback;
void *client_data;
FILE *file; /* only used if FLAC__stream_decoder_init_file()/FLAC__stream_decoder_init_file() called, else NULL */
FLAC__BitReader *input;
FLAC__int32 *output[FLAC__MAX_CHANNELS];
FLAC__int32 *residual[FLAC__MAX_CHANNELS]; /* WATCHOUT: these are the aligned pointers; the real pointers that should be free()'d are residual_unaligned[] below */
FLAC__int64 *side_subframe;
FLAC__bool side_subframe_in_use;
FLAC__EntropyCodingMethod_PartitionedRiceContents partitioned_rice_contents[FLAC__MAX_CHANNELS];
uint32_t output_capacity, output_channels;
FLAC__uint32 fixed_block_size, next_fixed_block_size;
FLAC__uint64 samples_decoded;
FLAC__bool has_stream_info, has_seek_table;
FLAC__StreamMetadata stream_info;
FLAC__StreamMetadata seek_table;
FLAC__bool metadata_filter[128]; /* MAGIC number 128 == total number of metadata block types == 1 << 7 */
FLAC__byte *metadata_filter_ids;
size_t metadata_filter_ids_count, metadata_filter_ids_capacity; /* units for both are IDs, not bytes */
FLAC__Frame frame;
FLAC__bool cached; /* true if there is a byte in lookahead */
FLAC__byte header_warmup[2]; /* contains the sync code and reserved bits */
FLAC__byte lookahead; /* temp storage when we need to look ahead one byte in the stream */
/* unaligned (original) pointers to allocated data */
FLAC__int32 *residual_unaligned[FLAC__MAX_CHANNELS];
FLAC__bool do_md5_checking; /* initially gets protected_->md5_checking but is turned off after a seek or if the metadata has a zero MD5 */
FLAC__bool internal_reset_hack; /* used only during init() so we can call reset to set up the decoder without rewinding the input */
FLAC__bool is_seeking;
FLAC__MD5Context md5context;
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__Frame last_frame; /* holds the info of the last frame we decoded or seeked to */
FLAC__bool last_frame_is_set;
FLAC__uint64 first_frame_offset; /* hint to the seek routine of where in the stream the first audio frame starts */
FLAC__uint64 last_seen_framesync; /* if tell callback works, the location of the last seen frame sync code, to rewind to if needed */
FLAC__uint64 target_sample;
uint32_t unparseable_frame_count; /* used to tell whether we're decoding a future version of FLAC or just got a bad sync */
FLAC__bool got_a_frame; /* hack needed in Ogg FLAC seek routine to check when process_single() actually writes a frame */
} FLAC__StreamDecoderPrivate;
/***********************************************************************
*
* Public static class data
*
***********************************************************************/
FLAC_API const char * const FLAC__StreamDecoderStateString[] = {
"FLAC__STREAM_DECODER_SEARCH_FOR_METADATA",
"FLAC__STREAM_DECODER_READ_METADATA",
"FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC",
"FLAC__STREAM_DECODER_READ_FRAME",
"FLAC__STREAM_DECODER_END_OF_STREAM",
"FLAC__STREAM_DECODER_OGG_ERROR",
"FLAC__STREAM_DECODER_SEEK_ERROR",
"FLAC__STREAM_DECODER_ABORTED",
"FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR",
"FLAC__STREAM_DECODER_UNINITIALIZED"
};
FLAC_API const char * const FLAC__StreamDecoderInitStatusString[] = {
"FLAC__STREAM_DECODER_INIT_STATUS_OK",
"FLAC__STREAM_DECODER_INIT_STATUS_UNSUPPORTED_CONTAINER",
"FLAC__STREAM_DECODER_INIT_STATUS_INVALID_CALLBACKS",
"FLAC__STREAM_DECODER_INIT_STATUS_MEMORY_ALLOCATION_ERROR",
"FLAC__STREAM_DECODER_INIT_STATUS_ERROR_OPENING_FILE",
"FLAC__STREAM_DECODER_INIT_STATUS_ALREADY_INITIALIZED"
};
FLAC_API const char * const FLAC__StreamDecoderReadStatusString[] = {
"FLAC__STREAM_DECODER_READ_STATUS_CONTINUE",
"FLAC__STREAM_DECODER_READ_STATUS_END_OF_STREAM",
"FLAC__STREAM_DECODER_READ_STATUS_ABORT"
};
FLAC_API const char * const FLAC__StreamDecoderSeekStatusString[] = {
"FLAC__STREAM_DECODER_SEEK_STATUS_OK",
"FLAC__STREAM_DECODER_SEEK_STATUS_ERROR",
"FLAC__STREAM_DECODER_SEEK_STATUS_UNSUPPORTED"
};
FLAC_API const char * const FLAC__StreamDecoderTellStatusString[] = {
"FLAC__STREAM_DECODER_TELL_STATUS_OK",
"FLAC__STREAM_DECODER_TELL_STATUS_ERROR",
"FLAC__STREAM_DECODER_TELL_STATUS_UNSUPPORTED"
};
FLAC_API const char * const FLAC__StreamDecoderLengthStatusString[] = {
"FLAC__STREAM_DECODER_LENGTH_STATUS_OK",
"FLAC__STREAM_DECODER_LENGTH_STATUS_ERROR",
"FLAC__STREAM_DECODER_LENGTH_STATUS_UNSUPPORTED"
};
FLAC_API const char * const FLAC__StreamDecoderWriteStatusString[] = {
"FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE",
"FLAC__STREAM_DECODER_WRITE_STATUS_ABORT"
};
FLAC_API const char * const FLAC__StreamDecoderErrorStatusString[] = {
"FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC",
"FLAC__STREAM_DECODER_ERROR_STATUS_BAD_HEADER",
"FLAC__STREAM_DECODER_ERROR_STATUS_FRAME_CRC_MISMATCH",
"FLAC__STREAM_DECODER_ERROR_STATUS_UNPARSEABLE_STREAM",
"FLAC__STREAM_DECODER_ERROR_STATUS_BAD_METADATA"
};
/***********************************************************************
*
* Class constructor/destructor
*
***********************************************************************/
FLAC_API FLAC__StreamDecoder *FLAC__stream_decoder_new(void)
{
FLAC__StreamDecoder *decoder;
uint32_t i;
FLAC__ASSERT(sizeof(int) >= 4); /* we want to die right away if this is not true */
decoder = calloc(1, sizeof(FLAC__StreamDecoder));
if(decoder == 0) {
return 0;
}
decoder->protected_ = calloc(1, sizeof(FLAC__StreamDecoderProtected));
if(decoder->protected_ == 0) {
free(decoder);
return 0;
}
decoder->private_ = calloc(1, sizeof(FLAC__StreamDecoderPrivate));
if(decoder->private_ == 0) {
free(decoder->protected_);
free(decoder);
return 0;
}
decoder->private_->input = FLAC__bitreader_new();
if(decoder->private_->input == 0) {
free(decoder->private_);
free(decoder->protected_);
free(decoder);
return 0;
}
decoder->private_->metadata_filter_ids_capacity = 16;
if(0 == (decoder->private_->metadata_filter_ids = malloc((FLAC__STREAM_METADATA_APPLICATION_ID_LEN/8) * decoder->private_->metadata_filter_ids_capacity))) {
FLAC__bitreader_delete(decoder->private_->input);
free(decoder->private_);
free(decoder->protected_);
free(decoder);
return 0;
}
for(i = 0; i < FLAC__MAX_CHANNELS; i++) {
decoder->private_->output[i] = 0;
decoder->private_->residual_unaligned[i] = decoder->private_->residual[i] = 0;
}
decoder->private_->side_subframe = 0;
decoder->private_->output_capacity = 0;
decoder->private_->output_channels = 0;
decoder->private_->has_seek_table = false;
for(i = 0; i < FLAC__MAX_CHANNELS; i++)
FLAC__format_entropy_coding_method_partitioned_rice_contents_init(&decoder->private_->partitioned_rice_contents[i]);
decoder->private_->file = 0;
set_defaults_(decoder);
decoder->protected_->state = FLAC__STREAM_DECODER_UNINITIALIZED;
return decoder;
}
FLAC_API void FLAC__stream_decoder_delete(FLAC__StreamDecoder *decoder)
{
uint32_t i;
if (decoder == NULL)
return ;
FLAC__ASSERT(0 != decoder->protected_);
FLAC__ASSERT(0 != decoder->private_);
FLAC__ASSERT(0 != decoder->private_->input);
(void)FLAC__stream_decoder_finish(decoder);
if(0 != decoder->private_->metadata_filter_ids)
free(decoder->private_->metadata_filter_ids);
FLAC__bitreader_delete(decoder->private_->input);
for(i = 0; i < FLAC__MAX_CHANNELS; i++)
FLAC__format_entropy_coding_method_partitioned_rice_contents_clear(&decoder->private_->partitioned_rice_contents[i]);
free(decoder->private_);
free(decoder->protected_);
free(decoder);
}
/***********************************************************************
*
* Public class methods
*
***********************************************************************/
static FLAC__StreamDecoderInitStatus init_stream_internal_(
FLAC__StreamDecoder *decoder,
FLAC__StreamDecoderReadCallback read_callback,
FLAC__StreamDecoderSeekCallback seek_callback,
FLAC__StreamDecoderTellCallback tell_callback,
FLAC__StreamDecoderLengthCallback length_callback,
FLAC__StreamDecoderEofCallback eof_callback,
FLAC__StreamDecoderWriteCallback write_callback,
FLAC__StreamDecoderMetadataCallback metadata_callback,
FLAC__StreamDecoderErrorCallback error_callback,
void *client_data,
FLAC__bool is_ogg
)
{
FLAC__ASSERT(0 != decoder);
if(decoder->protected_->state != FLAC__STREAM_DECODER_UNINITIALIZED)
return FLAC__STREAM_DECODER_INIT_STATUS_ALREADY_INITIALIZED;
if(FLAC__HAS_OGG == 0 && is_ogg)
return FLAC__STREAM_DECODER_INIT_STATUS_UNSUPPORTED_CONTAINER;
if(
0 == read_callback ||
0 == write_callback ||
0 == error_callback ||
(seek_callback && (0 == tell_callback || 0 == length_callback || 0 == eof_callback))
)
return FLAC__STREAM_DECODER_INIT_STATUS_INVALID_CALLBACKS;
#if FLAC__HAS_OGG
decoder->private_->is_ogg = is_ogg;
if(is_ogg && !FLAC__ogg_decoder_aspect_init(&decoder->protected_->ogg_decoder_aspect))
return decoder->protected_->initstate = FLAC__STREAM_DECODER_INIT_STATUS_ERROR_OPENING_FILE;
#endif
/* from here on, errors are fatal */
if(!FLAC__bitreader_init(decoder->private_->input, read_callback_, decoder)) {
decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
return FLAC__STREAM_DECODER_INIT_STATUS_MEMORY_ALLOCATION_ERROR;
}
decoder->private_->read_callback = read_callback;
decoder->private_->seek_callback = seek_callback;
decoder->private_->tell_callback = tell_callback;
decoder->private_->length_callback = length_callback;
decoder->private_->eof_callback = eof_callback;
decoder->private_->write_callback = write_callback;
decoder->private_->metadata_callback = metadata_callback;
decoder->private_->error_callback = error_callback;
decoder->private_->client_data = client_data;
decoder->private_->fixed_block_size = decoder->private_->next_fixed_block_size = 0;
decoder->private_->samples_decoded = 0;
decoder->private_->has_stream_info = false;
decoder->private_->cached = false;
decoder->private_->do_md5_checking = decoder->protected_->md5_checking;
decoder->private_->is_seeking = false;
decoder->private_->internal_reset_hack = true; /* so the following reset does not try to rewind the input */
if(!FLAC__stream_decoder_reset(decoder)) {
/* above call sets the state for us */
return FLAC__STREAM_DECODER_INIT_STATUS_MEMORY_ALLOCATION_ERROR;
}
return FLAC__STREAM_DECODER_INIT_STATUS_OK;
}
FLAC_API FLAC__StreamDecoderInitStatus FLAC__stream_decoder_init_stream(
FLAC__StreamDecoder *decoder,
FLAC__StreamDecoderReadCallback read_callback,
FLAC__StreamDecoderSeekCallback seek_callback,
FLAC__StreamDecoderTellCallback tell_callback,
FLAC__StreamDecoderLengthCallback length_callback,
FLAC__StreamDecoderEofCallback eof_callback,
FLAC__StreamDecoderWriteCallback write_callback,
FLAC__StreamDecoderMetadataCallback metadata_callback,
FLAC__StreamDecoderErrorCallback error_callback,
void *client_data
)
{
return init_stream_internal_(
decoder,
read_callback,
seek_callback,
tell_callback,
length_callback,
eof_callback,
write_callback,
metadata_callback,
error_callback,
client_data,
/*is_ogg=*/false
);
}
FLAC_API FLAC__StreamDecoderInitStatus FLAC__stream_decoder_init_ogg_stream(
FLAC__StreamDecoder *decoder,
FLAC__StreamDecoderReadCallback read_callback,
FLAC__StreamDecoderSeekCallback seek_callback,
FLAC__StreamDecoderTellCallback tell_callback,
FLAC__StreamDecoderLengthCallback length_callback,
FLAC__StreamDecoderEofCallback eof_callback,
FLAC__StreamDecoderWriteCallback write_callback,
FLAC__StreamDecoderMetadataCallback metadata_callback,
FLAC__StreamDecoderErrorCallback error_callback,
void *client_data
)
{
return init_stream_internal_(
decoder,
read_callback,
seek_callback,
tell_callback,
length_callback,
eof_callback,
write_callback,
metadata_callback,
error_callback,
client_data,
/*is_ogg=*/true
);
}
static FLAC__StreamDecoderInitStatus init_FILE_internal_(
FLAC__StreamDecoder *decoder,
FILE *file,
FLAC__StreamDecoderWriteCallback write_callback,
FLAC__StreamDecoderMetadataCallback metadata_callback,
FLAC__StreamDecoderErrorCallback error_callback,
void *client_data,
FLAC__bool is_ogg
)
{
FLAC__ASSERT(0 != decoder);
FLAC__ASSERT(0 != file);
if(decoder->protected_->state != FLAC__STREAM_DECODER_UNINITIALIZED)
return decoder->protected_->initstate = FLAC__STREAM_DECODER_INIT_STATUS_ALREADY_INITIALIZED;
if(0 == write_callback || 0 == error_callback)
return decoder->protected_->initstate = FLAC__STREAM_DECODER_INIT_STATUS_INVALID_CALLBACKS;
/*
* To make sure that our file does not go unclosed after an error, we
* must assign the FILE pointer before any further error can occur in
* this routine.
*/
if(file == stdin)
file = get_binary_stdin_(); /* just to be safe */
decoder->private_->file = file;
return init_stream_internal_(
decoder,
file_read_callback_,
decoder->private_->file == stdin? 0: file_seek_callback_,
decoder->private_->file == stdin? 0: file_tell_callback_,
decoder->private_->file == stdin? 0: file_length_callback_,
file_eof_callback_,
write_callback,
metadata_callback,
error_callback,
client_data,
is_ogg
);
}
FLAC_API FLAC__StreamDecoderInitStatus FLAC__stream_decoder_init_FILE(
FLAC__StreamDecoder *decoder,
FILE *file,
FLAC__StreamDecoderWriteCallback write_callback,
FLAC__StreamDecoderMetadataCallback metadata_callback,
FLAC__StreamDecoderErrorCallback error_callback,
void *client_data
)
{
return init_FILE_internal_(decoder, file, write_callback, metadata_callback, error_callback, client_data, /*is_ogg=*/false);
}
FLAC_API FLAC__StreamDecoderInitStatus FLAC__stream_decoder_init_ogg_FILE(
FLAC__StreamDecoder *decoder,
FILE *file,
FLAC__StreamDecoderWriteCallback write_callback,
FLAC__StreamDecoderMetadataCallback metadata_callback,
FLAC__StreamDecoderErrorCallback error_callback,
void *client_data
)
{
return init_FILE_internal_(decoder, file, write_callback, metadata_callback, error_callback, client_data, /*is_ogg=*/true);
}
static FLAC__StreamDecoderInitStatus init_file_internal_(
FLAC__StreamDecoder *decoder,
const char *filename,
FLAC__StreamDecoderWriteCallback write_callback,
FLAC__StreamDecoderMetadataCallback metadata_callback,
FLAC__StreamDecoderErrorCallback error_callback,
void *client_data,
FLAC__bool is_ogg
)
{
FILE *file;
FLAC__ASSERT(0 != decoder);
/*
* To make sure that our file does not go unclosed after an error, we
* have to do the same entrance checks here that are later performed
* in FLAC__stream_decoder_init_FILE() before the FILE* is assigned.
*/
if(decoder->protected_->state != FLAC__STREAM_DECODER_UNINITIALIZED)
return decoder->protected_->initstate = FLAC__STREAM_DECODER_INIT_STATUS_ALREADY_INITIALIZED;
if(0 == write_callback || 0 == error_callback)
return decoder->protected_->initstate = FLAC__STREAM_DECODER_INIT_STATUS_INVALID_CALLBACKS;
file = filename? flac_fopen(filename, "rb") : stdin;
if(0 == file)
return FLAC__STREAM_DECODER_INIT_STATUS_ERROR_OPENING_FILE;
return init_FILE_internal_(decoder, file, write_callback, metadata_callback, error_callback, client_data, is_ogg);
}
FLAC_API FLAC__StreamDecoderInitStatus FLAC__stream_decoder_init_file(
FLAC__StreamDecoder *decoder,
const char *filename,
FLAC__StreamDecoderWriteCallback write_callback,
FLAC__StreamDecoderMetadataCallback metadata_callback,
FLAC__StreamDecoderErrorCallback error_callback,
void *client_data
)
{
return init_file_internal_(decoder, filename, write_callback, metadata_callback, error_callback, client_data, /*is_ogg=*/false);
}
FLAC_API FLAC__StreamDecoderInitStatus FLAC__stream_decoder_init_ogg_file(
FLAC__StreamDecoder *decoder,
const char *filename,
FLAC__StreamDecoderWriteCallback write_callback,
FLAC__StreamDecoderMetadataCallback metadata_callback,
FLAC__StreamDecoderErrorCallback error_callback,
void *client_data
)
{
return init_file_internal_(decoder, filename, write_callback, metadata_callback, error_callback, client_data, /*is_ogg=*/true);
}
FLAC_API FLAC__bool FLAC__stream_decoder_finish(FLAC__StreamDecoder *decoder)
{
FLAC__bool md5_failed = false;
uint32_t i;
FLAC__ASSERT(0 != decoder);
FLAC__ASSERT(0 != decoder->private_);
FLAC__ASSERT(0 != decoder->protected_);
if(decoder->protected_->state == FLAC__STREAM_DECODER_UNINITIALIZED)
return true;
/* see the comment in FLAC__stream_decoder_reset() as to why we
* always call FLAC__MD5Final()
*/
FLAC__MD5Final(decoder->private_->computed_md5sum, &decoder->private_->md5context);
free(decoder->private_->seek_table.data.seek_table.points);
decoder->private_->seek_table.data.seek_table.points = 0;
decoder->private_->has_seek_table = false;
FLAC__bitreader_free(decoder->private_->input);
for(i = 0; i < FLAC__MAX_CHANNELS; i++) {
/* WATCHOUT:
* FLAC__lpc_restore_signal_asm_ia32_mmx() and ..._intrin_sseN()
* require that the output arrays have a buffer of up to 3 zeroes
* in front (at negative indices) for alignment purposes;
* we use 4 to keep the data well-aligned.
*/
if(0 != decoder->private_->output[i]) {
free(decoder->private_->output[i]-4);
decoder->private_->output[i] = 0;
}
if(0 != decoder->private_->residual_unaligned[i]) {
free(decoder->private_->residual_unaligned[i]);
decoder->private_->residual_unaligned[i] = decoder->private_->residual[i] = 0;
}
}
if(0 != decoder->private_->side_subframe) {
free(decoder->private_->side_subframe);
decoder->private_->side_subframe = 0;
}
decoder->private_->output_capacity = 0;
decoder->private_->output_channels = 0;
#if FLAC__HAS_OGG
if(decoder->private_->is_ogg)
FLAC__ogg_decoder_aspect_finish(&decoder->protected_->ogg_decoder_aspect);
#endif
if(0 != decoder->private_->file) {
if(decoder->private_->file != stdin)
fclose(decoder->private_->file);
decoder->private_->file = 0;
}
if(decoder->private_->do_md5_checking) {
if(memcmp(decoder->private_->stream_info.data.stream_info.md5sum, decoder->private_->computed_md5sum, 16))
md5_failed = true;
}
decoder->private_->is_seeking = false;
set_defaults_(decoder);
decoder->protected_->state = FLAC__STREAM_DECODER_UNINITIALIZED;
return !md5_failed;
}
FLAC_API FLAC__bool FLAC__stream_decoder_set_ogg_serial_number(FLAC__StreamDecoder *decoder, long value)
{
FLAC__ASSERT(0 != decoder);
FLAC__ASSERT(0 != decoder->private_);
FLAC__ASSERT(0 != decoder->protected_);
if(decoder->protected_->state != FLAC__STREAM_DECODER_UNINITIALIZED)
return false;
#if FLAC__HAS_OGG
/* can't check decoder->private_->is_ogg since that's not set until init time */
FLAC__ogg_decoder_aspect_set_serial_number(&decoder->protected_->ogg_decoder_aspect, value);
return true;
#else
(void)value;
return false;
#endif
}
FLAC_API FLAC__bool FLAC__stream_decoder_set_md5_checking(FLAC__StreamDecoder *decoder, FLAC__bool value)
{
FLAC__ASSERT(0 != decoder);
FLAC__ASSERT(0 != decoder->protected_);
if(decoder->protected_->state != FLAC__STREAM_DECODER_UNINITIALIZED)
return false;
decoder->protected_->md5_checking = value;
return true;
}
FLAC_API FLAC__bool FLAC__stream_decoder_set_metadata_respond(FLAC__StreamDecoder *decoder, FLAC__MetadataType type)
{
FLAC__ASSERT(0 != decoder);
FLAC__ASSERT(0 != decoder->private_);
FLAC__ASSERT(0 != decoder->protected_);
FLAC__ASSERT((uint32_t)type <= FLAC__MAX_METADATA_TYPE_CODE);
/* double protection */
if((uint32_t)type > FLAC__MAX_METADATA_TYPE_CODE)
return false;
if(decoder->protected_->state != FLAC__STREAM_DECODER_UNINITIALIZED)
return false;
decoder->private_->metadata_filter[type] = true;
if(type == FLAC__METADATA_TYPE_APPLICATION)
decoder->private_->metadata_filter_ids_count = 0;
return true;
}
FLAC_API FLAC__bool FLAC__stream_decoder_set_metadata_respond_application(FLAC__StreamDecoder *decoder, const FLAC__byte id[4])
{
FLAC__ASSERT(0 != decoder);
FLAC__ASSERT(0 != decoder->private_);
FLAC__ASSERT(0 != decoder->protected_);
FLAC__ASSERT(0 != id);
if(decoder->protected_->state != FLAC__STREAM_DECODER_UNINITIALIZED)
return false;
if(decoder->private_->metadata_filter[FLAC__METADATA_TYPE_APPLICATION])
return true;
FLAC__ASSERT(0 != decoder->private_->metadata_filter_ids);
if(decoder->private_->metadata_filter_ids_count == decoder->private_->metadata_filter_ids_capacity) {
if(0 == (decoder->private_->metadata_filter_ids = safe_realloc_mul_2op_(decoder->private_->metadata_filter_ids, decoder->private_->metadata_filter_ids_capacity, /*times*/2))) {
decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
return false;
}
decoder->private_->metadata_filter_ids_capacity *= 2;
}
memcpy(decoder->private_->metadata_filter_ids + decoder->private_->metadata_filter_ids_count * (FLAC__STREAM_METADATA_APPLICATION_ID_LEN/8), id, (FLAC__STREAM_METADATA_APPLICATION_ID_LEN/8));
decoder->private_->metadata_filter_ids_count++;
return true;
}
FLAC_API FLAC__bool FLAC__stream_decoder_set_metadata_respond_all(FLAC__StreamDecoder *decoder)
{
uint32_t i;
FLAC__ASSERT(0 != decoder);
FLAC__ASSERT(0 != decoder->private_);
FLAC__ASSERT(0 != decoder->protected_);
if(decoder->protected_->state != FLAC__STREAM_DECODER_UNINITIALIZED)
return false;
for(i = 0; i < sizeof(decoder->private_->metadata_filter) / sizeof(decoder->private_->metadata_filter[0]); i++)
decoder->private_->metadata_filter[i] = true;
decoder->private_->metadata_filter_ids_count = 0;
return true;
}
FLAC_API FLAC__bool FLAC__stream_decoder_set_metadata_ignore(FLAC__StreamDecoder *decoder, FLAC__MetadataType type)
{
FLAC__ASSERT(0 != decoder);
FLAC__ASSERT(0 != decoder->private_);
FLAC__ASSERT(0 != decoder->protected_);
FLAC__ASSERT((uint32_t)type <= FLAC__MAX_METADATA_TYPE_CODE);
/* double protection */
if((uint32_t)type > FLAC__MAX_METADATA_TYPE_CODE)
return false;
if(decoder->protected_->state != FLAC__STREAM_DECODER_UNINITIALIZED)
return false;
decoder->private_->metadata_filter[type] = false;
if(type == FLAC__METADATA_TYPE_APPLICATION)
decoder->private_->metadata_filter_ids_count = 0;
return true;
}
FLAC_API FLAC__bool FLAC__stream_decoder_set_metadata_ignore_application(FLAC__StreamDecoder *decoder, const FLAC__byte id[4])
{
FLAC__ASSERT(0 != decoder);
FLAC__ASSERT(0 != decoder->private_);
FLAC__ASSERT(0 != decoder->protected_);
FLAC__ASSERT(0 != id);
if(decoder->protected_->state != FLAC__STREAM_DECODER_UNINITIALIZED)
return false;
if(!decoder->private_->metadata_filter[FLAC__METADATA_TYPE_APPLICATION])
return true;
FLAC__ASSERT(0 != decoder->private_->metadata_filter_ids);
if(decoder->private_->metadata_filter_ids_count == decoder->private_->metadata_filter_ids_capacity) {
if(0 == (decoder->private_->metadata_filter_ids = safe_realloc_mul_2op_(decoder->private_->metadata_filter_ids, decoder->private_->metadata_filter_ids_capacity, /*times*/2))) {
decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
return false;
}
decoder->private_->metadata_filter_ids_capacity *= 2;
}
memcpy(decoder->private_->metadata_filter_ids + decoder->private_->metadata_filter_ids_count * (FLAC__STREAM_METADATA_APPLICATION_ID_LEN/8), id, (FLAC__STREAM_METADATA_APPLICATION_ID_LEN/8));
decoder->private_->metadata_filter_ids_count++;
return true;
}
FLAC_API FLAC__bool FLAC__stream_decoder_set_metadata_ignore_all(FLAC__StreamDecoder *decoder)
{
FLAC__ASSERT(0 != decoder);
FLAC__ASSERT(0 != decoder->private_);
FLAC__ASSERT(0 != decoder->protected_);
if(decoder->protected_->state != FLAC__STREAM_DECODER_UNINITIALIZED)
return false;
memset(decoder->private_->metadata_filter, 0, sizeof(decoder->private_->metadata_filter));
decoder->private_->metadata_filter_ids_count = 0;
return true;
}
FLAC_API FLAC__StreamDecoderState FLAC__stream_decoder_get_state(const FLAC__StreamDecoder *decoder)
{
FLAC__ASSERT(0 != decoder);
FLAC__ASSERT(0 != decoder->protected_);
return decoder->protected_->state;
}
FLAC_API const char *FLAC__stream_decoder_get_resolved_state_string(const FLAC__StreamDecoder *decoder)
{
return FLAC__StreamDecoderStateString[decoder->protected_->state];
}
FLAC_API FLAC__bool FLAC__stream_decoder_get_md5_checking(const FLAC__StreamDecoder *decoder)
{
FLAC__ASSERT(0 != decoder);
FLAC__ASSERT(0 != decoder->protected_);
return decoder->protected_->md5_checking;
}
FLAC_API FLAC__uint64 FLAC__stream_decoder_get_total_samples(const FLAC__StreamDecoder *decoder)
{
FLAC__ASSERT(0 != decoder);
FLAC__ASSERT(0 != decoder->protected_);
return decoder->private_->has_stream_info? decoder->private_->stream_info.data.stream_info.total_samples : 0;
}
FLAC_API uint32_t FLAC__stream_decoder_get_channels(const FLAC__StreamDecoder *decoder)
{
FLAC__ASSERT(0 != decoder);
FLAC__ASSERT(0 != decoder->protected_);
return decoder->protected_->channels;
}
FLAC_API FLAC__ChannelAssignment FLAC__stream_decoder_get_channel_assignment(const FLAC__StreamDecoder *decoder)
{
FLAC__ASSERT(0 != decoder);
FLAC__ASSERT(0 != decoder->protected_);
return decoder->protected_->channel_assignment;
}
FLAC_API uint32_t FLAC__stream_decoder_get_bits_per_sample(const FLAC__StreamDecoder *decoder)
{
FLAC__ASSERT(0 != decoder);
FLAC__ASSERT(0 != decoder->protected_);
return decoder->protected_->bits_per_sample;
}
FLAC_API uint32_t FLAC__stream_decoder_get_sample_rate(const FLAC__StreamDecoder *decoder)
{
FLAC__ASSERT(0 != decoder);
FLAC__ASSERT(0 != decoder->protected_);
return decoder->protected_->sample_rate;
}
FLAC_API uint32_t FLAC__stream_decoder_get_blocksize(const FLAC__StreamDecoder *decoder)
{
FLAC__ASSERT(0 != decoder);
FLAC__ASSERT(0 != decoder->protected_);
return decoder->protected_->blocksize;
}
FLAC_API FLAC__bool FLAC__stream_decoder_get_decode_position(const FLAC__StreamDecoder *decoder, FLAC__uint64 *position)
{
FLAC__ASSERT(0 != decoder);
FLAC__ASSERT(0 != decoder->private_);
FLAC__ASSERT(0 != position);
if(FLAC__HAS_OGG && decoder->private_->is_ogg)
return false;
if(0 == decoder->private_->tell_callback)
return false;
if(decoder->private_->tell_callback(decoder, position, decoder->private_->client_data) != FLAC__STREAM_DECODER_TELL_STATUS_OK)
return false;
/* should never happen since all FLAC frames and metadata blocks are byte aligned, but check just in case */
if(!FLAC__bitreader_is_consumed_byte_aligned(decoder->private_->input))
return false;
FLAC__ASSERT(*position >= FLAC__stream_decoder_get_input_bytes_unconsumed(decoder));
*position -= FLAC__stream_decoder_get_input_bytes_unconsumed(decoder);
return true;
}
FLAC_API const void *FLAC__stream_decoder_get_client_data(FLAC__StreamDecoder *decoder)
{
return decoder->private_->client_data;
}
FLAC_API FLAC__bool FLAC__stream_decoder_flush(FLAC__StreamDecoder *decoder)
{
FLAC__ASSERT(0 != decoder);
FLAC__ASSERT(0 != decoder->private_);
FLAC__ASSERT(0 != decoder->protected_);
if(!decoder->private_->internal_reset_hack && decoder->protected_->state == FLAC__STREAM_DECODER_UNINITIALIZED)
return false;
decoder->private_->samples_decoded = 0;
decoder->private_->do_md5_checking = false;
decoder->private_->last_seen_framesync = 0;
#if FLAC__HAS_OGG
if(decoder->private_->is_ogg)
FLAC__ogg_decoder_aspect_flush(&decoder->protected_->ogg_decoder_aspect);
#endif
if(!FLAC__bitreader_clear(decoder->private_->input)) {
decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
return false;
}
decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
return true;
}
FLAC_API FLAC__bool FLAC__stream_decoder_reset(FLAC__StreamDecoder *decoder)
{
FLAC__ASSERT(0 != decoder);
FLAC__ASSERT(0 != decoder->private_);
FLAC__ASSERT(0 != decoder->protected_);
if(!FLAC__stream_decoder_flush(decoder)) {
/* above call sets the state for us */
return false;
}
#if FLAC__HAS_OGG
/*@@@ could go in !internal_reset_hack block below */
if(decoder->private_->is_ogg)
FLAC__ogg_decoder_aspect_reset(&decoder->protected_->ogg_decoder_aspect);
#endif
/* Rewind if necessary. If FLAC__stream_decoder_init() is calling us,
* (internal_reset_hack) don't try to rewind since we are already at
* the beginning of the stream and don't want to fail if the input is
* not seekable.
*/
if(!decoder->private_->internal_reset_hack) {
if(decoder->private_->file == stdin)
return false; /* can't rewind stdin, reset fails */
if(decoder->private_->seek_callback && decoder->private_->seek_callback(decoder, 0, decoder->private_->client_data) == FLAC__STREAM_DECODER_SEEK_STATUS_ERROR)
return false; /* seekable and seek fails, reset fails */
}
decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_METADATA;
decoder->private_->has_stream_info = false;
free(decoder->private_->seek_table.data.seek_table.points);
decoder->private_->seek_table.data.seek_table.points = 0;
decoder->private_->has_seek_table = false;
decoder->private_->do_md5_checking = decoder->protected_->md5_checking;
/*
* This goes in reset() and not flush() because according to the spec, a
* fixed-blocksize stream must stay that way through the whole stream.
*/
decoder->private_->fixed_block_size = decoder->private_->next_fixed_block_size = 0;
/* We initialize the FLAC__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 init the context here and finalize it in
* FLAC__stream_decoder_finish() to make sure things are always cleaned up
* properly.
*/
if(!decoder->private_->internal_reset_hack) {
/* Only finish MD5 context when it has been initialized
* (i.e. when internal_reset_hack is not set) */
FLAC__MD5Final(decoder->private_->computed_md5sum, &decoder->private_->md5context);
}
else
decoder->private_->internal_reset_hack = false;
FLAC__MD5Init(&decoder->private_->md5context);
decoder->private_->first_frame_offset = 0;
decoder->private_->unparseable_frame_count = 0;
decoder->private_->last_seen_framesync = 0;
decoder->private_->last_frame_is_set = false;
return true;
}
FLAC_API FLAC__bool FLAC__stream_decoder_process_single(FLAC__StreamDecoder *decoder)
{
FLAC__bool got_a_frame;
FLAC__ASSERT(0 != decoder);
FLAC__ASSERT(0 != decoder->protected_);
while(1) {
switch(decoder->protected_->state) {
case FLAC__STREAM_DECODER_SEARCH_FOR_METADATA:
if(!find_metadata_(decoder))
return false; /* above function sets the status for us */
break;
case FLAC__STREAM_DECODER_READ_METADATA:
if(!read_metadata_(decoder))
return false; /* above function sets the status for us */
else
return true;
case FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC:
if(!frame_sync_(decoder))
return true; /* above function sets the status for us */
break;
case FLAC__STREAM_DECODER_READ_FRAME: