| Index: flac/src/libFLAC/stream_decoder.c
|
| ===================================================================
|
| --- flac/src/libFLAC/stream_decoder.c (revision 0)
|
| +++ flac/src/libFLAC/stream_decoder.c (revision 0)
|
| @@ -0,0 +1,3387 @@
|
| +/* libFLAC - Free Lossless Audio Codec library
|
| + * Copyright (C) 2000,2001,2002,2003,2004,2005,2006,2007 Josh Coalson
|
| + *
|
| + * 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.
|
| + */
|
| +
|
| +#if HAVE_CONFIG_H
|
| +# include <config.h>
|
| +#endif
|
| +
|
| +#if defined _MSC_VER || defined __MINGW32__
|
| +#include <io.h> /* for _setmode() */
|
| +#include <fcntl.h> /* for _O_BINARY */
|
| +#endif
|
| +#if defined __CYGWIN__ || defined __EMX__
|
| +#include <io.h> /* for setmode(), O_BINARY */
|
| +#include <fcntl.h> /* for _O_BINARY */
|
| +#endif
|
| +#include <stdio.h>
|
| +#include <stdlib.h> /* for malloc() */
|
| +#include <string.h> /* for memset/memcpy() */
|
| +#include <sys/stat.h> /* for stat() */
|
| +#include <sys/types.h> /* for off_t */
|
| +#if defined _MSC_VER || defined __BORLANDC__ || defined __MINGW32__
|
| +#if _MSC_VER <= 1600 || defined __BORLANDC__ /* @@@ [2G limit] */
|
| +#define fseeko fseek
|
| +#define ftello ftell
|
| +#endif
|
| +#endif
|
| +#include "FLAC/assert.h"
|
| +#include "share/alloc.h"
|
| +#include "protected/stream_decoder.h"
|
| +#include "private/bitreader.h"
|
| +#include "private/bitmath.h"
|
| +#include "private/cpu.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"
|
| +
|
| +#ifdef max
|
| +#undef max
|
| +#endif
|
| +#define max(a,b) ((a)>(b)?(a):(b))
|
| +
|
| +/* adjust for compilers that can't understand using LLU suffix for uint64_t literals */
|
| +#ifdef _MSC_VER
|
| +#define FLAC__U64L(x) x
|
| +#else
|
| +#define FLAC__U64L(x) x##LLU
|
| +#endif
|
| +
|
| +
|
| +/* technically this should be in an "export.c" but this is convenient enough */
|
| +FLAC_API int FLAC_API_SUPPORTS_OGG_FLAC =
|
| +#if FLAC__HAS_OGG
|
| + 1
|
| +#else
|
| + 0
|
| +#endif
|
| +;
|
| +
|
| +
|
| +/***********************************************************************
|
| + *
|
| + * Private static data
|
| + *
|
| + ***********************************************************************/
|
| +
|
| +static 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, unsigned size, unsigned channels);
|
| +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, unsigned length);
|
| +static FLAC__bool read_metadata_seektable_(FLAC__StreamDecoder *decoder, FLAC__bool is_last, unsigned length);
|
| +static FLAC__bool read_metadata_vorbiscomment_(FLAC__StreamDecoder *decoder, FLAC__StreamMetadata_VorbisComment *obj);
|
| +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, unsigned channel, unsigned bps, FLAC__bool do_full_decode);
|
| +static FLAC__bool read_subframe_constant_(FLAC__StreamDecoder *decoder, unsigned channel, unsigned bps, FLAC__bool do_full_decode);
|
| +static FLAC__bool read_subframe_fixed_(FLAC__StreamDecoder *decoder, unsigned channel, unsigned bps, const unsigned order, FLAC__bool do_full_decode);
|
| +static FLAC__bool read_subframe_lpc_(FLAC__StreamDecoder *decoder, unsigned channel, unsigned bps, const unsigned order, FLAC__bool do_full_decode);
|
| +static FLAC__bool read_subframe_verbatim_(FLAC__StreamDecoder *decoder, unsigned channel, unsigned bps, FLAC__bool do_full_decode);
|
| +static FLAC__bool read_residual_partitioned_rice_(FLAC__StreamDecoder *decoder, unsigned predictor_order, unsigned 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 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 {
|
| +#if FLAC__HAS_OGG
|
| + FLAC__bool is_ogg;
|
| +#endif
|
| + 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;
|
| + /* generic 32-bit datapath: */
|
| + void (*local_lpc_restore_signal)(const FLAC__int32 residual[], unsigned data_len, const FLAC__int32 qlp_coeff[], unsigned order, int lp_quantization, FLAC__int32 data[]);
|
| + /* generic 64-bit datapath: */
|
| + void (*local_lpc_restore_signal_64bit)(const FLAC__int32 residual[], unsigned data_len, const FLAC__int32 qlp_coeff[], unsigned order, int lp_quantization, FLAC__int32 data[]);
|
| + /* for use when the signal is <= 16 bits-per-sample, or <= 15 bits-per-sample on a side channel (which requires 1 extra bit): */
|
| + void (*local_lpc_restore_signal_16bit)(const FLAC__int32 residual[], unsigned data_len, const FLAC__int32 qlp_coeff[], unsigned order, int lp_quantization, FLAC__int32 data[]);
|
| + /* for use when the signal is <= 16 bits-per-sample, or <= 15 bits-per-sample on a side channel (which requires 1 extra bit), AND order <= 8: */
|
| + void (*local_lpc_restore_signal_16bit_order8)(const FLAC__int32 residual[], unsigned data_len, const FLAC__int32 qlp_coeff[], unsigned order, int lp_quantization, FLAC__int32 data[]);
|
| + FLAC__bool (*local_bitreader_read_rice_signed_block)(FLAC__BitReader *br, int vals[], unsigned nvals, unsigned parameter);
|
| + 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__EntropyCodingMethod_PartitionedRiceContents partitioned_rice_contents[FLAC__MAX_CHANNELS];
|
| + unsigned 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__CPUInfo cpuinfo;
|
| + 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 seeked to */
|
| + FLAC__uint64 first_frame_offset; /* hint to the seek routine of where in the stream the first audio frame starts */
|
| + FLAC__uint64 target_sample;
|
| + unsigned unparseable_frame_count; /* used to tell whether we're decoding a future version of FLAC or just got a bad sync */
|
| +#if FLAC__HAS_OGG
|
| + FLAC__bool got_a_frame; /* hack needed in Ogg FLAC seek routine to check when process_single() actually writes a frame */
|
| +#endif
|
| +} 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"
|
| +};
|
| +
|
| +/***********************************************************************
|
| + *
|
| + * Class constructor/destructor
|
| + *
|
| + ***********************************************************************/
|
| +FLAC_API FLAC__StreamDecoder *FLAC__stream_decoder_new(void)
|
| +{
|
| + FLAC__StreamDecoder *decoder;
|
| + unsigned i;
|
| +
|
| + FLAC__ASSERT(sizeof(int) >= 4); /* we want to die right away if this is not true */
|
| +
|
| + decoder = (FLAC__StreamDecoder*)calloc(1, sizeof(FLAC__StreamDecoder));
|
| + if(decoder == 0) {
|
| + return 0;
|
| + }
|
| +
|
| + decoder->protected_ = (FLAC__StreamDecoderProtected*)calloc(1, sizeof(FLAC__StreamDecoderProtected));
|
| + if(decoder->protected_ == 0) {
|
| + free(decoder);
|
| + return 0;
|
| + }
|
| +
|
| + decoder->private_ = (FLAC__StreamDecoderPrivate*)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 = (FLAC__byte*)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_->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)
|
| +{
|
| + unsigned i;
|
| +
|
| + FLAC__ASSERT(0 != decoder);
|
| + 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
|
| + if(is_ogg)
|
| + return FLAC__STREAM_DECODER_INIT_STATUS_UNSUPPORTED_CONTAINER;
|
| +#endif
|
| +
|
| + 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_->state = FLAC__STREAM_DECODER_OGG_ERROR;
|
| +#endif
|
| +
|
| + /*
|
| + * get the CPU info and set the function pointers
|
| + */
|
| + FLAC__cpu_info(&decoder->private_->cpuinfo);
|
| + /* first default to the non-asm routines */
|
| + decoder->private_->local_lpc_restore_signal = FLAC__lpc_restore_signal;
|
| + decoder->private_->local_lpc_restore_signal_64bit = FLAC__lpc_restore_signal_wide;
|
| + decoder->private_->local_lpc_restore_signal_16bit = FLAC__lpc_restore_signal;
|
| + decoder->private_->local_lpc_restore_signal_16bit_order8 = FLAC__lpc_restore_signal;
|
| + decoder->private_->local_bitreader_read_rice_signed_block = FLAC__bitreader_read_rice_signed_block;
|
| + /* now override with asm where appropriate */
|
| +#ifndef FLAC__NO_ASM
|
| + if(decoder->private_->cpuinfo.use_asm) {
|
| +#ifdef FLAC__CPU_IA32
|
| + FLAC__ASSERT(decoder->private_->cpuinfo.type == FLAC__CPUINFO_TYPE_IA32);
|
| +#ifdef FLAC__HAS_NASM
|
| +#if 1 /*@@@@@@ OPT: not clearly faster, needs more testing */
|
| + if(decoder->private_->cpuinfo.data.ia32.bswap)
|
| + decoder->private_->local_bitreader_read_rice_signed_block = FLAC__bitreader_read_rice_signed_block_asm_ia32_bswap;
|
| +#endif
|
| + if(decoder->private_->cpuinfo.data.ia32.mmx) {
|
| + decoder->private_->local_lpc_restore_signal = FLAC__lpc_restore_signal_asm_ia32;
|
| + decoder->private_->local_lpc_restore_signal_16bit = FLAC__lpc_restore_signal_asm_ia32_mmx;
|
| + decoder->private_->local_lpc_restore_signal_16bit_order8 = FLAC__lpc_restore_signal_asm_ia32_mmx;
|
| + }
|
| + else {
|
| + decoder->private_->local_lpc_restore_signal = FLAC__lpc_restore_signal_asm_ia32;
|
| + decoder->private_->local_lpc_restore_signal_16bit = FLAC__lpc_restore_signal_asm_ia32;
|
| + decoder->private_->local_lpc_restore_signal_16bit_order8 = FLAC__lpc_restore_signal_asm_ia32;
|
| + }
|
| +#endif
|
| +#elif defined FLAC__CPU_PPC
|
| + FLAC__ASSERT(decoder->private_->cpuinfo.type == FLAC__CPUINFO_TYPE_PPC);
|
| + if(decoder->private_->cpuinfo.data.ppc.altivec) {
|
| + decoder->private_->local_lpc_restore_signal_16bit = FLAC__lpc_restore_signal_asm_ppc_altivec_16;
|
| + decoder->private_->local_lpc_restore_signal_16bit_order8 = FLAC__lpc_restore_signal_asm_ppc_altivec_16_order8;
|
| + }
|
| +#endif
|
| + }
|
| +#endif
|
| +
|
| + /* from here on, errors are fatal */
|
| +
|
| + if(!FLAC__bitreader_init(decoder->private_->input, decoder->private_->cpuinfo, 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_->state = FLAC__STREAM_DECODER_INIT_STATUS_ALREADY_INITIALIZED;
|
| +
|
| + if(0 == write_callback || 0 == error_callback)
|
| + return decoder->protected_->state = 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_->state = FLAC__STREAM_DECODER_INIT_STATUS_ALREADY_INITIALIZED;
|
| +
|
| + if(0 == write_callback || 0 == error_callback)
|
| + return decoder->protected_->state = FLAC__STREAM_DECODER_INIT_STATUS_INVALID_CALLBACKS;
|
| +
|
| + file = filename? 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;
|
| + unsigned 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__seekable_stream_decoder_reset() as to why we
|
| + * always call FLAC__MD5Final()
|
| + */
|
| + FLAC__MD5Final(decoder->private_->computed_md5sum, &decoder->private_->md5context);
|
| +
|
| + if(decoder->private_->has_seek_table && 0 != decoder->private_->seek_table.data.seek_table.points) {
|
| + 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() requires 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;
|
| + }
|
| + }
|
| + 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((unsigned)type <= FLAC__MAX_METADATA_TYPE_CODE);
|
| + /* double protection */
|
| + if((unsigned)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 = (FLAC__byte*)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)
|
| +{
|
| + unsigned 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((unsigned)type <= FLAC__MAX_METADATA_TYPE_CODE);
|
| + /* double protection */
|
| + if((unsigned)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 = (FLAC__byte*)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 unsigned 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 unsigned 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 unsigned 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 unsigned 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
|
| + if(decoder->private_->is_ogg)
|
| + return false;
|
| +#endif
|
| + 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 FLAC__bool FLAC__stream_decoder_flush(FLAC__StreamDecoder *decoder)
|
| +{
|
| + FLAC__ASSERT(0 != decoder);
|
| + FLAC__ASSERT(0 != decoder->private_);
|
| + FLAC__ASSERT(0 != decoder->protected_);
|
| +
|
| + decoder->private_->samples_decoded = 0;
|
| + decoder->private_->do_md5_checking = false;
|
| +
|
| +#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 */
|
| + }
|
| + else
|
| + decoder->private_->internal_reset_hack = false;
|
| +
|
| + decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_METADATA;
|
| +
|
| + decoder->private_->has_stream_info = false;
|
| + if(decoder->private_->has_seek_table && 0 != decoder->private_->seek_table.data.seek_table.points) {
|
| + 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.
|
| + */
|
| + FLAC__MD5Init(&decoder->private_->md5context);
|
| +
|
| + decoder->private_->first_frame_offset = 0;
|
| + decoder->private_->unparseable_frame_count = 0;
|
| +
|
| + 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:
|
| + if(!read_frame_(decoder, &got_a_frame, /*do_full_decode=*/true))
|
| + return false; /* above function sets the status for us */
|
| + if(got_a_frame)
|
| + return true; /* above function sets the status for us */
|
| + break;
|
| + case FLAC__STREAM_DECODER_END_OF_STREAM:
|
| + case FLAC__STREAM_DECODER_ABORTED:
|
| + return true;
|
| + default:
|
| + FLAC__ASSERT(0);
|
| + return false;
|
| + }
|
| + }
|
| +}
|
| +
|
| +FLAC_API FLAC__bool FLAC__stream_decoder_process_until_end_of_metadata(FLAC__StreamDecoder *decoder)
|
| +{
|
| + 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 */
|
| + break;
|
| + case FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC:
|
| + case FLAC__STREAM_DECODER_READ_FRAME:
|
| + case FLAC__STREAM_DECODER_END_OF_STREAM:
|
| + case FLAC__STREAM_DECODER_ABORTED:
|
| + return true;
|
| + default:
|
| + FLAC__ASSERT(0);
|
| + return false;
|
| + }
|
| + }
|
| +}
|
| +
|
| +FLAC_API FLAC__bool FLAC__stream_decoder_process_until_end_of_stream(FLAC__StreamDecoder *decoder)
|
| +{
|
| + FLAC__bool dummy;
|
| + 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 */
|
| + break;
|
| + 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:
|
| + if(!read_frame_(decoder, &dummy, /*do_full_decode=*/true))
|
| + return false; /* above function sets the status for us */
|
| + break;
|
| + case FLAC__STREAM_DECODER_END_OF_STREAM:
|
| + case FLAC__STREAM_DECODER_ABORTED:
|
| + return true;
|
| + default:
|
| + FLAC__ASSERT(0);
|
| + return false;
|
| + }
|
| + }
|
| +}
|
| +
|
| +FLAC_API FLAC__bool FLAC__stream_decoder_skip_single_frame(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:
|
| + case FLAC__STREAM_DECODER_READ_METADATA:
|
| + return false; /* above function sets the status for us */
|
| + 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:
|
| + if(!read_frame_(decoder, &got_a_frame, /*do_full_decode=*/false))
|
| + return false; /* above function sets the status for us */
|
| + if(got_a_frame)
|
| + return true; /* above function sets the status for us */
|
| + break;
|
| + case FLAC__STREAM_DECODER_END_OF_STREAM:
|
| + case FLAC__STREAM_DECODER_ABORTED:
|
| + return true;
|
| + default:
|
| + FLAC__ASSERT(0);
|
| + return false;
|
| + }
|
| + }
|
| +}
|
| +
|
| +FLAC_API FLAC__bool FLAC__stream_decoder_seek_absolute(FLAC__StreamDecoder *decoder, FLAC__uint64 sample)
|
| +{
|
| + FLAC__uint64 length;
|
| +
|
| + FLAC__ASSERT(0 != decoder);
|
| +
|
| + if(
|
| + decoder->protected_->state != FLAC__STREAM_DECODER_SEARCH_FOR_METADATA &&
|
| + decoder->protected_->state != FLAC__STREAM_DECODER_READ_METADATA &&
|
| + decoder->protected_->state != FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC &&
|
| + decoder->protected_->state != FLAC__STREAM_DECODER_READ_FRAME &&
|
| + decoder->protected_->state != FLAC__STREAM_DECODER_END_OF_STREAM
|
| + )
|
| + return false;
|
| +
|
| + if(0 == decoder->private_->seek_callback)
|
| + return false;
|
| +
|
| + FLAC__ASSERT(decoder->private_->seek_callback);
|
| + FLAC__ASSERT(decoder->private_->tell_callback);
|
| + FLAC__ASSERT(decoder->private_->length_callback);
|
| + FLAC__ASSERT(decoder->private_->eof_callback);
|
| +
|
| + if(FLAC__stream_decoder_get_total_samples(decoder) > 0 && sample >= FLAC__stream_decoder_get_total_samples(decoder))
|
| + return false;
|
| +
|
| + decoder->private_->is_seeking = true;
|
| +
|
| + /* turn off md5 checking if a seek is attempted */
|
| + decoder->private_->do_md5_checking = false;
|
| +
|
| + /* get the file length (currently our algorithm needs to know the length so it's also an error to get FLAC__STREAM_DECODER_LENGTH_STATUS_UNSUPPORTED) */
|
| + if(decoder->private_->length_callback(decoder, &length, decoder->private_->client_data) != FLAC__STREAM_DECODER_LENGTH_STATUS_OK) {
|
| + decoder->private_->is_seeking = false;
|
| + return false;
|
| + }
|
| +
|
| + /* if we haven't finished processing the metadata yet, do that so we have the STREAMINFO, SEEK_TABLE, and first_frame_offset */
|
| + if(
|
| + decoder->protected_->state == FLAC__STREAM_DECODER_SEARCH_FOR_METADATA ||
|
| + decoder->protected_->state == FLAC__STREAM_DECODER_READ_METADATA
|
| + ) {
|
| + if(!FLAC__stream_decoder_process_until_end_of_metadata(decoder)) {
|
| + /* above call sets the state for us */
|
| + decoder->private_->is_seeking = false;
|
| + return false;
|
| + }
|
| + /* check this again in case we didn't know total_samples the first time */
|
| + if(FLAC__stream_decoder_get_total_samples(decoder) > 0 && sample >= FLAC__stream_decoder_get_total_samples(decoder)) {
|
| + decoder->private_->is_seeking = false;
|
| + return false;
|
| + }
|
| + }
|
| +
|
| + {
|
| + const FLAC__bool ok =
|
| +#if FLAC__HAS_OGG
|
| + decoder->private_->is_ogg?
|
| + seek_to_absolute_sample_ogg_(decoder, length, sample) :
|
| +#endif
|
| + seek_to_absolute_sample_(decoder, length, sample)
|
| + ;
|
| + decoder->private_->is_seeking = false;
|
| + return ok;
|
| + }
|
| +}
|
| +
|
| +/***********************************************************************
|
| + *
|
| + * Protected class methods
|
| + *
|
| + ***********************************************************************/
|
| +
|
| +unsigned FLAC__stream_decoder_get_input_bytes_unconsumed(const FLAC__StreamDecoder *decoder)
|
| +{
|
| + FLAC__ASSERT(0 != decoder);
|
| + FLAC__ASSERT(FLAC__bitreader_is_consumed_byte_aligned(decoder->private_->input));
|
| + FLAC__ASSERT(!(FLAC__bitreader_get_input_bits_unconsumed(decoder->private_->input) & 7));
|
| + return FLAC__bitreader_get_input_bits_unconsumed(decoder->private_->input) / 8;
|
| +}
|
| +
|
| +/***********************************************************************
|
| + *
|
| + * Private class methods
|
| + *
|
| + ***********************************************************************/
|
| +
|
| +void set_defaults_(FLAC__StreamDecoder *decoder)
|
| +{
|
| +#if FLAC__HAS_OGG
|
| + decoder->private_->is_ogg = false;
|
| +#endif
|
| + 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;
|
| +
|
| + memset(decoder->private_->metadata_filter, 0, sizeof(decoder->private_->metadata_filter));
|
| + decoder->private_->metadata_filter[FLAC__METADATA_TYPE_STREAMINFO] = true;
|
| + decoder->private_->metadata_filter_ids_count = 0;
|
| +
|
| + decoder->protected_->md5_checking = false;
|
| +
|
| +#if FLAC__HAS_OGG
|
| + FLAC__ogg_decoder_aspect_set_defaults(&decoder->protected_->ogg_decoder_aspect);
|
| +#endif
|
| +}
|
| +
|
| +/*
|
| + * This will forcibly set stdin to binary mode (for OSes that require it)
|
| + */
|
| +FILE *get_binary_stdin_(void)
|
| +{
|
| + /* if something breaks here it is probably due to the presence or
|
| + * absence of an underscore before the identifiers 'setmode',
|
| + * 'fileno', and/or 'O_BINARY'; check your system header files.
|
| + */
|
| +#if defined _MSC_VER || defined __MINGW32__
|
| + _setmode(_fileno(stdin), _O_BINARY);
|
| +#elif defined __CYGWIN__
|
| + /* almost certainly not needed for any modern Cygwin, but let's be safe... */
|
| + setmode(_fileno(stdin), _O_BINARY);
|
| +#elif defined __EMX__
|
| + setmode(fileno(stdin), O_BINARY);
|
| +#endif
|
| +
|
| + return stdin;
|
| +}
|
| +
|
| +FLAC__bool allocate_output_(FLAC__StreamDecoder *decoder, unsigned size, unsigned channels)
|
| +{
|
| + unsigned i;
|
| + FLAC__int32 *tmp;
|
| +
|
| + if(size <= decoder->private_->output_capacity && channels <= decoder->private_->output_channels)
|
| + return true;
|
| +
|
| + /* simply using realloc() is not practical because the number of channels may change mid-stream */
|
| +
|
| + for(i = 0; i < FLAC__MAX_CHANNELS; i++) {
|
| + 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;
|
| + }
|
| + }
|
| +
|
| + for(i = 0; i < channels; i++) {
|
| + /* WATCHOUT:
|
| + * FLAC__lpc_restore_signal_asm_ia32_mmx() requires 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.
|
| + */
|
| + tmp = (FLAC__int32*)safe_malloc_muladd2_(sizeof(FLAC__int32), /*times (*/size, /*+*/4/*)*/);
|
| + if(tmp == 0) {
|
| + decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
|
| + return false;
|
| + }
|
| + memset(tmp, 0, sizeof(FLAC__int32)*4);
|
| + decoder->private_->output[i] = tmp + 4;
|
| +
|
| + /* WATCHOUT:
|
| + * minimum of quadword alignment for PPC vector optimizations is REQUIRED:
|
| + */
|
| + if(!FLAC__memory_alloc_aligned_int32_array(size, &decoder->private_->residual_unaligned[i], &decoder->private_->residual[i])) {
|
| + decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
|
| + return false;
|
| + }
|
| + }
|
| +
|
| + decoder->private_->output_capacity = size;
|
| + decoder->private_->output_channels = channels;
|
| +
|
| + return true;
|
| +}
|
| +
|
| +FLAC__bool has_id_filtered_(FLAC__StreamDecoder *decoder, FLAC__byte *id)
|
| +{
|
| + size_t i;
|
| +
|
| + FLAC__ASSERT(0 != decoder);
|
| + FLAC__ASSERT(0 != decoder->private_);
|
| +
|
| + for(i = 0; i < decoder->private_->metadata_filter_ids_count; i++)
|
| + if(0 == memcmp(decoder->private_->metadata_filter_ids + i * (FLAC__STREAM_METADATA_APPLICATION_ID_LEN/8), id, (FLAC__STREAM_METADATA_APPLICATION_ID_LEN/8)))
|
| + return true;
|
| +
|
| + return false;
|
| +}
|
| +
|
| +FLAC__bool find_metadata_(FLAC__StreamDecoder *decoder)
|
| +{
|
| + FLAC__uint32 x;
|
| + unsigned i, id;
|
| + FLAC__bool first = true;
|
| +
|
| + FLAC__ASSERT(FLAC__bitreader_is_consumed_byte_aligned(decoder->private_->input));
|
| +
|
| + for(i = id = 0; i < 4; ) {
|
| + if(decoder->private_->cached) {
|
| + x = (FLAC__uint32)decoder->private_->lookahead;
|
| + decoder->private_->cached = false;
|
| + }
|
| + else {
|
| + if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, 8))
|
| + return false; /* read_callback_ sets the state for us */
|
| + }
|
| + if(x == FLAC__STREAM_SYNC_STRING[i]) {
|
| + first = true;
|
| + i++;
|
| + id = 0;
|
| + continue;
|
| + }
|
| + if(x == ID3V2_TAG_[id]) {
|
| + id++;
|
| + i = 0;
|
| + if(id == 3) {
|
| + if(!skip_id3v2_tag_(decoder))
|
| + return false; /* skip_id3v2_tag_ sets the state for us */
|
| + }
|
| + continue;
|
| + }
|
| + id = 0;
|
| + if(x == 0xff) { /* MAGIC NUMBER for the first 8 frame sync bits */
|
| + decoder->private_->header_warmup[0] = (FLAC__byte)x;
|
| + if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, 8))
|
| + return false; /* read_callback_ sets the state for us */
|
| +
|
| + /* we have to check if we just read two 0xff's in a row; the second may actually be the beginning of the sync code */
|
| + /* else we have to check if the second byte is the end of a sync code */
|
| + if(x == 0xff) { /* MAGIC NUMBER for the first 8 frame sync bits */
|
| + decoder->private_->lookahead = (FLAC__byte)x;
|
| + decoder->private_->cached = true;
|
| + }
|
| + else if(x >> 2 == 0x3e) { /* MAGIC NUMBER for the last 6 sync bits */
|
| + decoder->private_->header_warmup[1] = (FLAC__byte)x;
|
| + decoder->protected_->state = FLAC__STREAM_DECODER_READ_FRAME;
|
| + return true;
|
| + }
|
| + }
|
| + i = 0;
|
| + if(first) {
|
| + send_error_to_client_(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC);
|
| + first = false;
|
| + }
|
| + }
|
| +
|
| + decoder->protected_->state = FLAC__STREAM_DECODER_READ_METADATA;
|
| + return true;
|
| +}
|
| +
|
| +FLAC__bool read_metadata_(FLAC__StreamDecoder *decoder)
|
| +{
|
| + FLAC__bool is_last;
|
| + FLAC__uint32 i, x, type, length;
|
| +
|
| + FLAC__ASSERT(FLAC__bitreader_is_consumed_byte_aligned(decoder->private_->input));
|
| +
|
| + if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_IS_LAST_LEN))
|
| + return false; /* read_callback_ sets the state for us */
|
| + is_last = x? true : false;
|
| +
|
| + if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &type, FLAC__STREAM_METADATA_TYPE_LEN))
|
| + return false; /* read_callback_ sets the state for us */
|
| +
|
| + if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &length, FLAC__STREAM_METADATA_LENGTH_LEN))
|
| + return false; /* read_callback_ sets the state for us */
|
| +
|
| + if(type == FLAC__METADATA_TYPE_STREAMINFO) {
|
| + if(!read_metadata_streaminfo_(decoder, is_last, length))
|
| + return false;
|
| +
|
| + decoder->private_->has_stream_info = true;
|
| + if(0 == memcmp(decoder->private_->stream_info.data.stream_info.md5sum, "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0", 16))
|
| + decoder->private_->do_md5_checking = false;
|
| + if(!decoder->private_->is_seeking && decoder->private_->metadata_filter[FLAC__METADATA_TYPE_STREAMINFO] && decoder->private_->metadata_callback)
|
| + decoder->private_->metadata_callback(decoder, &decoder->private_->stream_info, decoder->private_->client_data);
|
| + }
|
| + else if(type == FLAC__METADATA_TYPE_SEEKTABLE) {
|
| + if(!read_metadata_seektable_(decoder, is_last, length))
|
| + return false;
|
| +
|
| + decoder->private_->has_seek_table = true;
|
| + if(!decoder->private_->is_seeking && decoder->private_->metadata_filter[FLAC__METADATA_TYPE_SEEKTABLE] && decoder->private_->metadata_callback)
|
| + decoder->private_->metadata_callback(decoder, &decoder->private_->seek_table, decoder->private_->client_data);
|
| + }
|
| + else {
|
| + FLAC__bool skip_it = !decoder->private_->metadata_filter[type];
|
| + unsigned real_length = length;
|
| + FLAC__StreamMetadata block;
|
| +
|
| + block.is_last = is_last;
|
| + block.type = (FLAC__MetadataType)type;
|
| + block.length = length;
|
| +
|
| + if(type == FLAC__METADATA_TYPE_APPLICATION) {
|
| + if(!FLAC__bitreader_read_byte_block_aligned_no_crc(decoder->private_->input, block.data.application.id, FLAC__STREAM_METADATA_APPLICATION_ID_LEN/8))
|
| + return false; /* read_callback_ sets the state for us */
|
| +
|
| + if(real_length < FLAC__STREAM_METADATA_APPLICATION_ID_LEN/8) { /* underflow check */
|
| + decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;/*@@@@@@ maybe wrong error? need to resync?*/
|
| + return false;
|
| + }
|
| +
|
| + real_length -= FLAC__STREAM_METADATA_APPLICATION_ID_LEN/8;
|
| +
|
| + if(decoder->private_->metadata_filter_ids_count > 0 && has_id_filtered_(decoder, block.data.application.id))
|
| + skip_it = !skip_it;
|
| + }
|
| +
|
| + if(skip_it) {
|
| + if(!FLAC__bitreader_skip_byte_block_aligned_no_crc(decoder->private_->input, real_length))
|
| + return false; /* read_callback_ sets the state for us */
|
| + }
|
| + else {
|
| + switch(type) {
|
| + case FLAC__METADATA_TYPE_PADDING:
|
| + /* skip the padding bytes */
|
| + if(!FLAC__bitreader_skip_byte_block_aligned_no_crc(decoder->private_->input, real_length))
|
| + return false; /* read_callback_ sets the state for us */
|
| + break;
|
| + case FLAC__METADATA_TYPE_APPLICATION:
|
| + /* remember, we read the ID already */
|
| + if(real_length > 0) {
|
| + if(0 == (block.data.application.data = (FLAC__byte*)malloc(real_length))) {
|
| + decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
|
| + return false;
|
| + }
|
| + if(!FLAC__bitreader_read_byte_block_aligned_no_crc(decoder->private_->input, block.data.application.data, real_length))
|
| + return false; /* read_callback_ sets the state for us */
|
| + }
|
| + else
|
| + block.data.application.data = 0;
|
| + break;
|
| + case FLAC__METADATA_TYPE_VORBIS_COMMENT:
|
| + if(!read_metadata_vorbiscomment_(decoder, &block.data.vorbis_comment))
|
| + return false;
|
| + break;
|
| + case FLAC__METADATA_TYPE_CUESHEET:
|
| + if(!read_metadata_cuesheet_(decoder, &block.data.cue_sheet))
|
| + return false;
|
| + break;
|
| + case FLAC__METADATA_TYPE_PICTURE:
|
| + if(!read_metadata_picture_(decoder, &block.data.picture))
|
| + return false;
|
| + break;
|
| + case FLAC__METADATA_TYPE_STREAMINFO:
|
| + case FLAC__METADATA_TYPE_SEEKTABLE:
|
| + FLAC__ASSERT(0);
|
| + break;
|
| + default:
|
| + if(real_length > 0) {
|
| + if(0 == (block.data.unknown.data = (FLAC__byte*)malloc(real_length))) {
|
| + decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
|
| + return false;
|
| + }
|
| + if(!FLAC__bitreader_read_byte_block_aligned_no_crc(decoder->private_->input, block.data.unknown.data, real_length))
|
| + return false; /* read_callback_ sets the state for us */
|
| + }
|
| + else
|
| + block.data.unknown.data = 0;
|
| + break;
|
| + }
|
| + if(!decoder->private_->is_seeking && decoder->private_->metadata_callback)
|
| + decoder->private_->metadata_callback(decoder, &block, decoder->private_->client_data);
|
| +
|
| + /* now we have to free any malloc()ed data in the block */
|
| + switch(type) {
|
| + case FLAC__METADATA_TYPE_PADDING:
|
| + break;
|
| + case FLAC__METADATA_TYPE_APPLICATION:
|
| + if(0 != block.data.application.data)
|
| + free(block.data.application.data);
|
| + break;
|
| + case FLAC__METADATA_TYPE_VORBIS_COMMENT:
|
| + if(0 != block.data.vorbis_comment.vendor_string.entry)
|
| + free(block.data.vorbis_comment.vendor_string.entry);
|
| + if(block.data.vorbis_comment.num_comments > 0)
|
| + for(i = 0; i < block.data.vorbis_comment.num_comments; i++)
|
| + if(0 != block.data.vorbis_comment.comments[i].entry)
|
| + free(block.data.vorbis_comment.comments[i].entry);
|
| + if(0 != block.data.vorbis_comment.comments)
|
| + free(block.data.vorbis_comment.comments);
|
| + break;
|
| + case FLAC__METADATA_TYPE_CUESHEET:
|
| + if(block.data.cue_sheet.num_tracks > 0)
|
| + for(i = 0; i < block.data.cue_sheet.num_tracks; i++)
|
| + if(0 != block.data.cue_sheet.tracks[i].indices)
|
| + free(block.data.cue_sheet.tracks[i].indices);
|
| + if(0 != block.data.cue_sheet.tracks)
|
| + free(block.data.cue_sheet.tracks);
|
| + break;
|
| + case FLAC__METADATA_TYPE_PICTURE:
|
| + if(0 != block.data.picture.mime_type)
|
| + free(block.data.picture.mime_type);
|
| + if(0 != block.data.picture.description)
|
| + free(block.data.picture.description);
|
| + if(0 != block.data.picture.data)
|
| + free(block.data.picture.data);
|
| + break;
|
| + case FLAC__METADATA_TYPE_STREAMINFO:
|
| + case FLAC__METADATA_TYPE_SEEKTABLE:
|
| + FLAC__ASSERT(0);
|
| + default:
|
| + if(0 != block.data.unknown.data)
|
| + free(block.data.unknown.data);
|
| + break;
|
| + }
|
| + }
|
| + }
|
| +
|
| + if(is_last) {
|
| + /* if this fails, it's OK, it's just a hint for the seek routine */
|
| + if(!FLAC__stream_decoder_get_decode_position(decoder, &decoder->private_->first_frame_offset))
|
| + decoder->private_->first_frame_offset = 0;
|
| + decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
|
| + }
|
| +
|
| + return true;
|
| +}
|
| +
|
| +FLAC__bool read_metadata_streaminfo_(FLAC__StreamDecoder *decoder, FLAC__bool is_last, unsigned length)
|
| +{
|
| + FLAC__uint32 x;
|
| + unsigned bits, used_bits = 0;
|
| +
|
| + FLAC__ASSERT(FLAC__bitreader_is_consumed_byte_aligned(decoder->private_->input));
|
| +
|
| + decoder->private_->stream_info.type = FLAC__METADATA_TYPE_STREAMINFO;
|
| + decoder->private_->stream_info.is_last = is_last;
|
| + decoder->private_->stream_info.length = length;
|
| +
|
| + bits = FLAC__STREAM_METADATA_STREAMINFO_MIN_BLOCK_SIZE_LEN;
|
| + if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, bits))
|
| + return false; /* read_callback_ sets the state for us */
|
| + decoder->private_->stream_info.data.stream_info.min_blocksize = x;
|
| + used_bits += bits;
|
| +
|
| + bits = FLAC__STREAM_METADATA_STREAMINFO_MAX_BLOCK_SIZE_LEN;
|
| + if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_STREAMINFO_MAX_BLOCK_SIZE_LEN))
|
| + return false; /* read_callback_ sets the state for us */
|
| + decoder->private_->stream_info.data.stream_info.max_blocksize = x;
|
| + used_bits += bits;
|
| +
|
| + bits = FLAC__STREAM_METADATA_STREAMINFO_MIN_FRAME_SIZE_LEN;
|
| + if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_STREAMINFO_MIN_FRAME_SIZE_LEN))
|
| + return false; /* read_callback_ sets the state for us */
|
| + decoder->private_->stream_info.data.stream_info.min_framesize = x;
|
| + used_bits += bits;
|
| +
|
| + bits = FLAC__STREAM_METADATA_STREAMINFO_MAX_FRAME_SIZE_LEN;
|
| + if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_STREAMINFO_MAX_FRAME_SIZE_LEN))
|
| + return false; /* read_callback_ sets the state for us */
|
| + decoder->private_->stream_info.data.stream_info.max_framesize = x;
|
| + used_bits += bits;
|
| +
|
| + bits = FLAC__STREAM_METADATA_STREAMINFO_SAMPLE_RATE_LEN;
|
| + if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_STREAMINFO_SAMPLE_RATE_LEN))
|
| + return false; /* read_callback_ sets the state for us */
|
| + decoder->private_->stream_info.data.stream_info.sample_rate = x;
|
| + used_bits += bits;
|
| +
|
| + bits = FLAC__STREAM_METADATA_STREAMINFO_CHANNELS_LEN;
|
| + if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_STREAMINFO_CHANNELS_LEN))
|
| + return false; /* read_callback_ sets the state for us */
|
| + decoder->private_->stream_info.data.stream_info.channels = x+1;
|
| + used_bits += bits;
|
| +
|
| + bits = FLAC__STREAM_METADATA_STREAMINFO_BITS_PER_SAMPLE_LEN;
|
| + if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_STREAMINFO_BITS_PER_SAMPLE_LEN))
|
| + return false; /* read_callback_ sets the state for us */
|
| + decoder->private_->stream_info.data.stream_info.bits_per_sample = x+1;
|
| + used_bits += bits;
|
| +
|
| + bits = FLAC__STREAM_METADATA_STREAMINFO_TOTAL_SAMPLES_LEN;
|
| + if(!FLAC__bitreader_read_raw_uint64(decoder->private_->input, &decoder->private_->stream_info.data.stream_info.total_samples, FLAC__STREAM_METADATA_STREAMINFO_TOTAL_SAMPLES_LEN))
|
| + return false; /* read_callback_ sets the state for us */
|
| + used_bits += bits;
|
| +
|
| + if(!FLAC__bitreader_read_byte_block_aligned_no_crc(decoder->private_->input, decoder->private_->stream_info.data.stream_info.md5sum, 16))
|
| + return false; /* read_callback_ sets the state for us */
|
| + used_bits += 16*8;
|
| +
|
| + /* skip the rest of the block */
|
| + FLAC__ASSERT(used_bits % 8 == 0);
|
| + length -= (used_bits / 8);
|
| + if(!FLAC__bitreader_skip_byte_block_aligned_no_crc(decoder->private_->input, length))
|
| + return false; /* read_callback_ sets the state for us */
|
| +
|
| + return true;
|
| +}
|
| +
|
| +FLAC__bool read_metadata_seektable_(FLAC__StreamDecoder *decoder, FLAC__bool is_last, unsigned length)
|
| +{
|
| + FLAC__uint32 i, x;
|
| + FLAC__uint64 xx;
|
| +
|
| + FLAC__ASSERT(FLAC__bitreader_is_consumed_byte_aligned(decoder->private_->input));
|
| +
|
| + decoder->private_->seek_table.type = FLAC__METADATA_TYPE_SEEKTABLE;
|
| + decoder->private_->seek_table.is_last = is_last;
|
| + decoder->private_->seek_table.length = length;
|
| +
|
| + decoder->private_->seek_table.data.seek_table.num_points = length / FLAC__STREAM_METADATA_SEEKPOINT_LENGTH;
|
| +
|
| + /* use realloc since we may pass through here several times (e.g. after seeking) */
|
| + if(0 == (decoder->private_->seek_table.data.seek_table.points = (FLAC__StreamMetadata_SeekPoint*)safe_realloc_mul_2op_(decoder->private_->seek_table.data.seek_table.points, decoder->private_->seek_table.data.seek_table.num_points, /*times*/sizeof(FLAC__StreamMetadata_SeekPoint)))) {
|
| + decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
|
| + return false;
|
| + }
|
| + for(i = 0; i < decoder->private_->seek_table.data.seek_table.num_points; i++) {
|
| + if(!FLAC__bitreader_read_raw_uint64(decoder->private_->input, &xx, FLAC__STREAM_METADATA_SEEKPOINT_SAMPLE_NUMBER_LEN))
|
| + return false; /* read_callback_ sets the state for us */
|
| + decoder->private_->seek_table.data.seek_table.points[i].sample_number = xx;
|
| +
|
| + if(!FLAC__bitreader_read_raw_uint64(decoder->private_->input, &xx, FLAC__STREAM_METADATA_SEEKPOINT_STREAM_OFFSET_LEN))
|
| + return false; /* read_callback_ sets the state for us */
|
| + decoder->private_->seek_table.data.seek_table.points[i].stream_offset = xx;
|
| +
|
| + if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_SEEKPOINT_FRAME_SAMPLES_LEN))
|
| + return false; /* read_callback_ sets the state for us */
|
| + decoder->private_->seek_table.data.seek_table.points[i].frame_samples = x;
|
| + }
|
| + length -= (decoder->private_->seek_table.data.seek_table.num_points * FLAC__STREAM_METADATA_SEEKPOINT_LENGTH);
|
| + /* if there is a partial point left, skip over it */
|
| + if(length > 0) {
|
| + /*@@@ do a send_error_to_client_() here? there's an argument for either way */
|
| + if(!FLAC__bitreader_skip_byte_block_aligned_no_crc(decoder->private_->input, length))
|
| + return false; /* read_callback_ sets the state for us */
|
| + }
|
| +
|
| + return true;
|
| +}
|
| +
|
| +FLAC__bool read_metadata_vorbiscomment_(FLAC__StreamDecoder *decoder, FLAC__StreamMetadata_VorbisComment *obj)
|
| +{
|
| + FLAC__uint32 i;
|
| +
|
| + FLAC__ASSERT(FLAC__bitreader_is_consumed_byte_aligned(decoder->private_->input));
|
| +
|
| + /* read vendor string */
|
| + FLAC__ASSERT(FLAC__STREAM_METADATA_VORBIS_COMMENT_ENTRY_LENGTH_LEN == 32);
|
| + if(!FLAC__bitreader_read_uint32_little_endian(decoder->private_->input, &obj->vendor_string.length))
|
| + return false; /* read_callback_ sets the state for us */
|
| + if(obj->vendor_string.length > 0) {
|
| + if(0 == (obj->vendor_string.entry = (FLAC__byte*)safe_malloc_add_2op_(obj->vendor_string.length, /*+*/1))) {
|
| + decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
|
| + return false;
|
| + }
|
| + if(!FLAC__bitreader_read_byte_block_aligned_no_crc(decoder->private_->input, obj->vendor_string.entry, obj->vendor_string.length))
|
| + return false; /* read_callback_ sets the state for us */
|
| + obj->vendor_string.entry[obj->vendor_string.length] = '\0';
|
| + }
|
| + else
|
| + obj->vendor_string.entry = 0;
|
| +
|
| + /* read num comments */
|
| + FLAC__ASSERT(FLAC__STREAM_METADATA_VORBIS_COMMENT_NUM_COMMENTS_LEN == 32);
|
| + if(!FLAC__bitreader_read_uint32_little_endian(decoder->private_->input, &obj->num_comments))
|
| + return false; /* read_callback_ sets the state for us */
|
| +
|
| + /* read comments */
|
| + if(obj->num_comments > 0) {
|
| + if(0 == (obj->comments = (FLAC__StreamMetadata_VorbisComment_Entry*)safe_malloc_mul_2op_(obj->num_comments, /*times*/sizeof(FLAC__StreamMetadata_VorbisComment_Entry)))) {
|
| + decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
|
| + return false;
|
| + }
|
| + for(i = 0; i < obj->num_comments; i++) {
|
| + FLAC__ASSERT(FLAC__STREAM_METADATA_VORBIS_COMMENT_ENTRY_LENGTH_LEN == 32);
|
| + if(!FLAC__bitreader_read_uint32_little_endian(decoder->private_->input, &obj->comments[i].length))
|
| + return false; /* read_callback_ sets the state for us */
|
| + if(obj->comments[i].length > 0) {
|
| + if(0 == (obj->comments[i].entry = (FLAC__byte*)safe_malloc_add_2op_(obj->comments[i].length, /*+*/1))) {
|
| + decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
|
| + return false;
|
| + }
|
| + if(!FLAC__bitreader_read_byte_block_aligned_no_crc(decoder->private_->input, obj->comments[i].entry, obj->comments[i].length))
|
| + return false; /* read_callback_ sets the state for us */
|
| + obj->comments[i].entry[obj->comments[i].length] = '\0';
|
| + }
|
| + else
|
| + obj->comments[i].entry = 0;
|
| + }
|
| + }
|
| + else {
|
| + obj->comments = 0;
|
| + }
|
| +
|
| + return true;
|
| +}
|
| +
|
| +FLAC__bool read_metadata_cuesheet_(FLAC__StreamDecoder *decoder, FLAC__StreamMetadata_CueSheet *obj)
|
| +{
|
| + FLAC__uint32 i, j, x;
|
| +
|
| + FLAC__ASSERT(FLAC__bitreader_is_consumed_byte_aligned(decoder->private_->input));
|
| +
|
| + memset(obj, 0, sizeof(FLAC__StreamMetadata_CueSheet));
|
| +
|
| + FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_MEDIA_CATALOG_NUMBER_LEN % 8 == 0);
|
| + if(!FLAC__bitreader_read_byte_block_aligned_no_crc(decoder->private_->input, (FLAC__byte*)obj->media_catalog_number, FLAC__STREAM_METADATA_CUESHEET_MEDIA_CATALOG_NUMBER_LEN/8))
|
| + return false; /* read_callback_ sets the state for us */
|
| +
|
| + if(!FLAC__bitreader_read_raw_uint64(decoder->private_->input, &obj->lead_in, FLAC__STREAM_METADATA_CUESHEET_LEAD_IN_LEN))
|
| + return false; /* read_callback_ sets the state for us */
|
| +
|
| + if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_CUESHEET_IS_CD_LEN))
|
| + return false; /* read_callback_ sets the state for us */
|
| + obj->is_cd = x? true : false;
|
| +
|
| + if(!FLAC__bitreader_skip_bits_no_crc(decoder->private_->input, FLAC__STREAM_METADATA_CUESHEET_RESERVED_LEN))
|
| + return false; /* read_callback_ sets the state for us */
|
| +
|
| + if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_CUESHEET_NUM_TRACKS_LEN))
|
| + return false; /* read_callback_ sets the state for us */
|
| + obj->num_tracks = x;
|
| +
|
| + if(obj->num_tracks > 0) {
|
| + if(0 == (obj->tracks = (FLAC__StreamMetadata_CueSheet_Track*)safe_calloc_(obj->num_tracks, sizeof(FLAC__StreamMetadata_CueSheet_Track)))) {
|
| + decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
|
| + return false;
|
| + }
|
| + for(i = 0; i < obj->num_tracks; i++) {
|
| + FLAC__StreamMetadata_CueSheet_Track *track = &obj->tracks[i];
|
| + if(!FLAC__bitreader_read_raw_uint64(decoder->private_->input, &track->offset, FLAC__STREAM_METADATA_CUESHEET_TRACK_OFFSET_LEN))
|
| + return false; /* read_callback_ sets the state for us */
|
| +
|
| + if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_CUESHEET_TRACK_NUMBER_LEN))
|
| + return false; /* read_callback_ sets the state for us */
|
| + track->number = (FLAC__byte)x;
|
| +
|
| + FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_ISRC_LEN % 8 == 0);
|
| + if(!FLAC__bitreader_read_byte_block_aligned_no_crc(decoder->private_->input, (FLAC__byte*)track->isrc, FLAC__STREAM_METADATA_CUESHEET_TRACK_ISRC_LEN/8))
|
| + return false; /* read_callback_ sets the state for us */
|
| +
|
| + if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_CUESHEET_TRACK_TYPE_LEN))
|
| + return false; /* read_callback_ sets the state for us */
|
| + track->type = x;
|
| +
|
| + if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_CUESHEET_TRACK_PRE_EMPHASIS_LEN))
|
| + return false; /* read_callback_ sets the state for us */
|
| + track->pre_emphasis = x;
|
| +
|
| + if(!FLAC__bitreader_skip_bits_no_crc(decoder->private_->input, FLAC__STREAM_METADATA_CUESHEET_TRACK_RESERVED_LEN))
|
| + return false; /* read_callback_ sets the state for us */
|
| +
|
| + if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_CUESHEET_TRACK_NUM_INDICES_LEN))
|
| + return false; /* read_callback_ sets the state for us */
|
| + track->num_indices = (FLAC__byte)x;
|
| +
|
| + if(track->num_indices > 0) {
|
| + if(0 == (track->indices = (FLAC__StreamMetadata_CueSheet_Index*)safe_calloc_(track->num_indices, sizeof(FLAC__StreamMetadata_CueSheet_Index)))) {
|
| + decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
|
| + return false;
|
| + }
|
| + for(j = 0; j < track->num_indices; j++) {
|
| + FLAC__StreamMetadata_CueSheet_Index *index = &track->indices[j];
|
| + if(!FLAC__bitreader_read_raw_uint64(decoder->private_->input, &index->offset, FLAC__STREAM_METADATA_CUESHEET_INDEX_OFFSET_LEN))
|
| + return false; /* read_callback_ sets the state for us */
|
| +
|
| + if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_CUESHEET_INDEX_NUMBER_LEN))
|
| + return false; /* read_callback_ sets the state for us */
|
| + index->number = (FLAC__byte)x;
|
| +
|
| + if(!FLAC__bitreader_skip_bits_no_crc(decoder->private_->input, FLAC__STREAM_METADATA_CUESHEET_INDEX_RESERVED_LEN))
|
| + return false; /* read_callback_ sets the state for us */
|
| + }
|
| + }
|
| + }
|
| + }
|
| +
|
| + return true;
|
| +}
|
| +
|
| +FLAC__bool read_metadata_picture_(FLAC__StreamDecoder *decoder, FLAC__StreamMetadata_Picture *obj)
|
| +{
|
| + FLAC__uint32 x;
|
| +
|
| + FLAC__ASSERT(FLAC__bitreader_is_consumed_byte_aligned(decoder->private_->input));
|
| +
|
| + /* read type */
|
| + if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_PICTURE_TYPE_LEN))
|
| + return false; /* read_callback_ sets the state for us */
|
| + obj->type = x;
|
| +
|
| + /* read MIME type */
|
| + if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_PICTURE_MIME_TYPE_LENGTH_LEN))
|
| + return false; /* read_callback_ sets the state for us */
|
| + if(0 == (obj->mime_type = (char*)safe_malloc_add_2op_(x, /*+*/1))) {
|
| + decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
|
| + return false;
|
| + }
|
| + if(x > 0) {
|
| + if(!FLAC__bitreader_read_byte_block_aligned_no_crc(decoder->private_->input, (FLAC__byte*)obj->mime_type, x))
|
| + return false; /* read_callback_ sets the state for us */
|
| + }
|
| + obj->mime_type[x] = '\0';
|
| +
|
| + /* read description */
|
| + if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_PICTURE_DESCRIPTION_LENGTH_LEN))
|
| + return false; /* read_callback_ sets the state for us */
|
| + if(0 == (obj->description = (FLAC__byte*)safe_malloc_add_2op_(x, /*+*/1))) {
|
| + decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
|
| + return false;
|
| + }
|
| + if(x > 0) {
|
| + if(!FLAC__bitreader_read_byte_block_aligned_no_crc(decoder->private_->input, obj->description, x))
|
| + return false; /* read_callback_ sets the state for us */
|
| + }
|
| + obj->description[x] = '\0';
|
| +
|
| + /* read width */
|
| + if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &obj->width, FLAC__STREAM_METADATA_PICTURE_WIDTH_LEN))
|
| + return false; /* read_callback_ sets the state for us */
|
| +
|
| + /* read height */
|
| + if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &obj->height, FLAC__STREAM_METADATA_PICTURE_HEIGHT_LEN))
|
| + return false; /* read_callback_ sets the state for us */
|
| +
|
| + /* read depth */
|
| + if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &obj->depth, FLAC__STREAM_METADATA_PICTURE_DEPTH_LEN))
|
| + return false; /* read_callback_ sets the state for us */
|
| +
|
| + /* read colors */
|
| + if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &obj->colors, FLAC__STREAM_METADATA_PICTURE_COLORS_LEN))
|
| + return false; /* read_callback_ sets the state for us */
|
| +
|
| + /* read data */
|
| + if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &(obj->data_length), FLAC__STREAM_METADATA_PICTURE_DATA_LENGTH_LEN))
|
| + return false; /* read_callback_ sets the state for us */
|
| + if(0 == (obj->data = (FLAC__byte*)safe_malloc_(obj->data_length))) {
|
| + decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
|
| + return false;
|
| + }
|
| + if(obj->data_length > 0) {
|
| + if(!FLAC__bitreader_read_byte_block_aligned_no_crc(decoder->private_->input, obj->data, obj->data_length))
|
| + return false; /* read_callback_ sets the state for us */
|
| + }
|
| +
|
| + return true;
|
| +}
|
| +
|
| +FLAC__bool skip_id3v2_tag_(FLAC__StreamDecoder *decoder)
|
| +{
|
| + FLAC__uint32 x;
|
| + unsigned i, skip;
|
| +
|
| + /* skip the version and flags bytes */
|
| + if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, 24))
|
| + return false; /* read_callback_ sets the state for us */
|
| + /* get the size (in bytes) to skip */
|
| + skip = 0;
|
| + for(i = 0; i < 4; i++) {
|
| + if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, 8))
|
| + return false; /* read_callback_ sets the state for us */
|
| + skip <<= 7;
|
| + skip |= (x & 0x7f);
|
| + }
|
| + /* skip the rest of the tag */
|
| + if(!FLAC__bitreader_skip_byte_block_aligned_no_crc(decoder->private_->input, skip))
|
| + return false; /* read_callback_ sets the state for us */
|
| + return true;
|
| +}
|
| +
|
| +FLAC__bool frame_sync_(FLAC__StreamDecoder *decoder)
|
| +{
|
| + FLAC__uint32 x;
|
| + FLAC__bool first = true;
|
| +
|
| + /* If we know the total number of samples in the stream, stop if we've read that many. */
|
| + /* This will stop us, for example, from wasting time trying to sync on an ID3V1 tag. */
|
| + if(FLAC__stream_decoder_get_total_samples(decoder) > 0) {
|
| + if(decoder->private_->samples_decoded >= FLAC__stream_decoder_get_total_samples(decoder)) {
|
| + decoder->protected_->state = FLAC__STREAM_DECODER_END_OF_STREAM;
|
| + return true;
|
| + }
|
| + }
|
| +
|
| + /* make sure we're byte aligned */
|
| + if(!FLAC__bitreader_is_consumed_byte_aligned(decoder->private_->input)) {
|
| + if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, FLAC__bitreader_bits_left_for_byte_alignment(decoder->private_->input)))
|
| + return false; /* read_callback_ sets the state for us */
|
| + }
|
| +
|
| + while(1) {
|
| + if(decoder->private_->cached) {
|
| + x = (FLAC__uint32)decoder->private_->lookahead;
|
| + decoder->private_->cached = false;
|
| + }
|
| + else {
|
| + if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, 8))
|
| + return false; /* read_callback_ sets the state for us */
|
| + }
|
| + if(x == 0xff) { /* MAGIC NUMBER for the first 8 frame sync bits */
|
| + decoder->private_->header_warmup[0] = (FLAC__byte)x;
|
| + if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, 8))
|
| + return false; /* read_callback_ sets the state for us */
|
| +
|
| + /* we have to check if we just read two 0xff's in a row; the second may actually be the beginning of the sync code */
|
| + /* else we have to check if the second byte is the end of a sync code */
|
| + if(x == 0xff) { /* MAGIC NUMBER for the first 8 frame sync bits */
|
| + decoder->private_->lookahead = (FLAC__byte)x;
|
| + decoder->private_->cached = true;
|
| + }
|
| + else if(x >> 2 == 0x3e) { /* MAGIC NUMBER for the last 6 sync bits */
|
| + decoder->private_->header_warmup[1] = (FLAC__byte)x;
|
| + decoder->protected_->state = FLAC__STREAM_DECODER_READ_FRAME;
|
| + return true;
|
| + }
|
| + }
|
| + if(first) {
|
| + send_error_to_client_(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC);
|
| + first = false;
|
| + }
|
| + }
|
| +
|
| + return true;
|
| +}
|
| +
|
| +FLAC__bool read_frame_(FLAC__StreamDecoder *decoder, FLAC__bool *got_a_frame, FLAC__bool do_full_decode)
|
| +{
|
| + unsigned channel;
|
| + unsigned i;
|
| + FLAC__int32 mid, side;
|
| + unsigned frame_crc; /* the one we calculate from the input stream */
|
| + FLAC__uint32 x;
|
| +
|
| + *got_a_frame = false;
|
| +
|
| + /* init the CRC */
|
| + frame_crc = 0;
|
| + frame_crc = FLAC__CRC16_UPDATE(decoder->private_->header_warmup[0], frame_crc);
|
| + frame_crc = FLAC__CRC16_UPDATE(decoder->private_->header_warmup[1], frame_crc);
|
| + FLAC__bitreader_reset_read_crc16(decoder->private_->input, (FLAC__uint16)frame_crc);
|
| +
|
| + if(!read_frame_header_(decoder))
|
| + return false;
|
| + if(decoder->protected_->state == FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC) /* means we didn't sync on a valid header */
|
| + return true;
|
| + if(!allocate_output_(decoder, decoder->private_->frame.header.blocksize, decoder->private_->frame.header.channels))
|
| + return false;
|
| + for(channel = 0; channel < decoder->private_->frame.header.channels; channel++) {
|
| + /*
|
| + * first figure the correct bits-per-sample of the subframe
|
| + */
|
| + unsigned bps = decoder->private_->frame.header.bits_per_sample;
|
| + switch(decoder->private_->frame.header.channel_assignment) {
|
| + case FLAC__CHANNEL_ASSIGNMENT_INDEPENDENT:
|
| + /* no adjustment needed */
|
| + break;
|
| + case FLAC__CHANNEL_ASSIGNMENT_LEFT_SIDE:
|
| + FLAC__ASSERT(decoder->private_->frame.header.channels == 2);
|
| + if(channel == 1)
|
| + bps++;
|
| + break;
|
| + case FLAC__CHANNEL_ASSIGNMENT_RIGHT_SIDE:
|
| + FLAC__ASSERT(decoder->private_->frame.header.channels == 2);
|
| + if(channel == 0)
|
| + bps++;
|
| + break;
|
| + case FLAC__CHANNEL_ASSIGNMENT_MID_SIDE:
|
| + FLAC__ASSERT(decoder->private_->frame.header.channels == 2);
|
| + if(channel == 1)
|
| + bps++;
|
| + break;
|
| + default:
|
| + FLAC__ASSERT(0);
|
| + }
|
| + /*
|
| + * now read it
|
| + */
|
| + if(!read_subframe_(decoder, channel, bps, do_full_decode))
|
| + return false;
|
| + if(decoder->protected_->state == FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC) /* means bad sync or got corruption */
|
| + return true;
|
| + }
|
| + if(!read_zero_padding_(decoder))
|
| + return false;
|
| + if(decoder->protected_->state == FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC) /* means bad sync or got corruption (i.e. "zero bits" were not all zeroes) */
|
| + return true;
|
| +
|
| + /*
|
| + * Read the frame CRC-16 from the footer and check
|
| + */
|
| + frame_crc = FLAC__bitreader_get_read_crc16(decoder->private_->input);
|
| + if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, FLAC__FRAME_FOOTER_CRC_LEN))
|
| + return false; /* read_callback_ sets the state for us */
|
| + if(frame_crc == x) {
|
| + if(do_full_decode) {
|
| + /* Undo any special channel coding */
|
| + switch(decoder->private_->frame.header.channel_assignment) {
|
| + case FLAC__CHANNEL_ASSIGNMENT_INDEPENDENT:
|
| + /* do nothing */
|
| + break;
|
| + case FLAC__CHANNEL_ASSIGNMENT_LEFT_SIDE:
|
| + FLAC__ASSERT(decoder->private_->frame.header.channels == 2);
|
| + for(i = 0; i < decoder->private_->frame.header.blocksize; i++)
|
| + decoder->private_->output[1][i] = decoder->private_->output[0][i] - decoder->private_->output[1][i];
|
| + break;
|
| + case FLAC__CHANNEL_ASSIGNMENT_RIGHT_SIDE:
|
| + FLAC__ASSERT(decoder->private_->frame.header.channels == 2);
|
| + for(i = 0; i < decoder->private_->frame.header.blocksize; i++)
|
| + decoder->private_->output[0][i] += decoder->private_->output[1][i];
|
| + break;
|
| + case FLAC__CHANNEL_ASSIGNMENT_MID_SIDE:
|
| + FLAC__ASSERT(decoder->private_->frame.header.channels == 2);
|
| + for(i = 0; i < decoder->private_->frame.header.blocksize; i++) {
|
| +#if 1
|
| + mid = decoder->private_->output[0][i];
|
| + side = decoder->private_->output[1][i];
|
| + mid <<= 1;
|
| + mid |= (side & 1); /* i.e. if 'side' is odd... */
|
| + decoder->private_->output[0][i] = (mid + side) >> 1;
|
| + decoder->private_->output[1][i] = (mid - side) >> 1;
|
| +#else
|
| + /* OPT: without 'side' temp variable */
|
| + mid = (decoder->private_->output[0][i] << 1) | (decoder->private_->output[1][i] & 1); /* i.e. if 'side' is odd... */
|
| + decoder->private_->output[0][i] = (mid + decoder->private_->output[1][i]) >> 1;
|
| + decoder->private_->output[1][i] = (mid - decoder->private_->output[1][i]) >> 1;
|
| +#endif
|
| + }
|
| + break;
|
| + default:
|
| + FLAC__ASSERT(0);
|
| + break;
|
| + }
|
| + }
|
| + }
|
| + else {
|
| + /* Bad frame, emit error and zero the output signal */
|
| + send_error_to_client_(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_FRAME_CRC_MISMATCH);
|
| + if(do_full_decode) {
|
| + for(channel = 0; channel < decoder->private_->frame.header.channels; channel++) {
|
| + memset(decoder->private_->output[channel], 0, sizeof(FLAC__int32) * decoder->private_->frame.header.blocksize);
|
| + }
|
| + }
|
| + }
|
| +
|
| + *got_a_frame = true;
|
| +
|
| + /* we wait to update fixed_block_size until here, when we're sure we've got a proper frame and hence a correct blocksize */
|
| + if(decoder->private_->next_fixed_block_size)
|
| + decoder->private_->fixed_block_size = decoder->private_->next_fixed_block_size;
|
| +
|
| + /* put the latest values into the public section of the decoder instance */
|
| + decoder->protected_->channels = decoder->private_->frame.header.channels;
|
| + decoder->protected_->channel_assignment = decoder->private_->frame.header.channel_assignment;
|
| + decoder->protected_->bits_per_sample = decoder->private_->frame.header.bits_per_sample;
|
| + decoder->protected_->sample_rate = decoder->private_->frame.header.sample_rate;
|
| + decoder->protected_->blocksize = decoder->private_->frame.header.blocksize;
|
| +
|
| + FLAC__ASSERT(decoder->private_->frame.header.number_type == FLAC__FRAME_NUMBER_TYPE_SAMPLE_NUMBER);
|
| + decoder->private_->samples_decoded = decoder->private_->frame.header.number.sample_number + decoder->private_->frame.header.blocksize;
|
| +
|
| + /* write it */
|
| + if(do_full_decode) {
|
| + if(write_audio_frame_to_client_(decoder, &decoder->private_->frame, (const FLAC__int32 * const *)decoder->private_->output) != FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE)
|
| + return false;
|
| + }
|
| +
|
| + decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
|
| + return true;
|
| +}
|
| +
|
| +FLAC__bool read_frame_header_(FLAC__StreamDecoder *decoder)
|
| +{
|
| + FLAC__uint32 x;
|
| + FLAC__uint64 xx;
|
| + unsigned i, blocksize_hint = 0, sample_rate_hint = 0;
|
| + FLAC__byte crc8, raw_header[16]; /* MAGIC NUMBER based on the maximum frame header size, including CRC */
|
| + unsigned raw_header_len;
|
| + FLAC__bool is_unparseable = false;
|
| +
|
| + FLAC__ASSERT(FLAC__bitreader_is_consumed_byte_aligned(decoder->private_->input));
|
| +
|
| + /* init the raw header with the saved bits from synchronization */
|
| + raw_header[0] = decoder->private_->header_warmup[0];
|
| + raw_header[1] = decoder->private_->header_warmup[1];
|
| + raw_header_len = 2;
|
| +
|
| + /* check to make sure that reserved bit is 0 */
|
| + if(raw_header[1] & 0x02) /* MAGIC NUMBER */
|
| + is_unparseable = true;
|
| +
|
| + /*
|
| + * Note that along the way as we read the header, we look for a sync
|
| + * code inside. If we find one it would indicate that our original
|
| + * sync was bad since there cannot be a sync code in a valid header.
|
| + *
|
| + * Three kinds of things can go wrong when reading the frame header:
|
| + * 1) We may have sync'ed incorrectly and not landed on a frame header.
|
| + * If we don't find a sync code, it can end up looking like we read
|
| + * a valid but unparseable header, until getting to the frame header
|
| + * CRC. Even then we could get a false positive on the CRC.
|
| + * 2) We may have sync'ed correctly but on an unparseable frame (from a
|
| + * future encoder).
|
| + * 3) We may be on a damaged frame which appears valid but unparseable.
|
| + *
|
| + * For all these reasons, we try and read a complete frame header as
|
| + * long as it seems valid, even if unparseable, up until the frame
|
| + * header CRC.
|
| + */
|
| +
|
| + /*
|
| + * read in the raw header as bytes so we can CRC it, and parse it on the way
|
| + */
|
| + for(i = 0; i < 2; i++) {
|
| + if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, 8))
|
| + return false; /* read_callback_ sets the state for us */
|
| + if(x == 0xff) { /* MAGIC NUMBER for the first 8 frame sync bits */
|
| + /* if we get here it means our original sync was erroneous since the sync code cannot appear in the header */
|
| + decoder->private_->lookahead = (FLAC__byte)x;
|
| + decoder->private_->cached = true;
|
| + send_error_to_client_(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_BAD_HEADER);
|
| + decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
|
| + return true;
|
| + }
|
| + raw_header[raw_header_len++] = (FLAC__byte)x;
|
| + }
|
| +
|
| + switch(x = raw_header[2] >> 4) {
|
| + case 0:
|
| + is_unparseable = true;
|
| + break;
|
| + case 1:
|
| + decoder->private_->frame.header.blocksize = 192;
|
| + break;
|
| + case 2:
|
| + case 3:
|
| + case 4:
|
| + case 5:
|
| + decoder->private_->frame.header.blocksize = 576 << (x-2);
|
| + break;
|
| + case 6:
|
| + case 7:
|
| + blocksize_hint = x;
|
| + break;
|
| + case 8:
|
| + case 9:
|
| + case 10:
|
| + case 11:
|
| + case 12:
|
| + case 13:
|
| + case 14:
|
| + case 15:
|
| + decoder->private_->frame.header.blocksize = 256 << (x-8);
|
| + break;
|
| + default:
|
| + FLAC__ASSERT(0);
|
| + break;
|
| + }
|
| +
|
| + switch(x = raw_header[2] & 0x0f) {
|
| + case 0:
|
| + if(decoder->private_->has_stream_info)
|
| + decoder->private_->frame.header.sample_rate = decoder->private_->stream_info.data.stream_info.sample_rate;
|
| + else
|
| + is_unparseable = true;
|
| + break;
|
| + case 1:
|
| + decoder->private_->frame.header.sample_rate = 88200;
|
| + break;
|
| + case 2:
|
| + decoder->private_->frame.header.sample_rate = 176400;
|
| + break;
|
| + case 3:
|
| + decoder->private_->frame.header.sample_rate = 192000;
|
| + break;
|
| + case 4:
|
| + decoder->private_->frame.header.sample_rate = 8000;
|
| + break;
|
| + case 5:
|
| + decoder->private_->frame.header.sample_rate = 16000;
|
| + break;
|
| + case 6:
|
| + decoder->private_->frame.header.sample_rate = 22050;
|
| + break;
|
| + case 7:
|
| + decoder->private_->frame.header.sample_rate = 24000;
|
| + break;
|
| + case 8:
|
| + decoder->private_->frame.header.sample_rate = 32000;
|
| + break;
|
| + case 9:
|
| + decoder->private_->frame.header.sample_rate = 44100;
|
| + break;
|
| + case 10:
|
| + decoder->private_->frame.header.sample_rate = 48000;
|
| + break;
|
| + case 11:
|
| + decoder->private_->frame.header.sample_rate = 96000;
|
| + break;
|
| + case 12:
|
| + case 13:
|
| + case 14:
|
| + sample_rate_hint = x;
|
| + break;
|
| + case 15:
|
| + send_error_to_client_(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_BAD_HEADER);
|
| + decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
|
| + return true;
|
| + default:
|
| + FLAC__ASSERT(0);
|
| + }
|
| +
|
| + x = (unsigned)(raw_header[3] >> 4);
|
| + if(x & 8) {
|
| + decoder->private_->frame.header.channels = 2;
|
| + switch(x & 7) {
|
| + case 0:
|
| + decoder->private_->frame.header.channel_assignment = FLAC__CHANNEL_ASSIGNMENT_LEFT_SIDE;
|
| + break;
|
| + case 1:
|
| + decoder->private_->frame.header.channel_assignment = FLAC__CHANNEL_ASSIGNMENT_RIGHT_SIDE;
|
| + break;
|
| + case 2:
|
| + decoder->private_->frame.header.channel_assignment = FLAC__CHANNEL_ASSIGNMENT_MID_SIDE;
|
| + break;
|
| + default:
|
| + is_unparseable = true;
|
| + break;
|
| + }
|
| + }
|
| + else {
|
| + decoder->private_->frame.header.channels = (unsigned)x + 1;
|
| + decoder->private_->frame.header.channel_assignment = FLAC__CHANNEL_ASSIGNMENT_INDEPENDENT;
|
| + }
|
| +
|
| + switch(x = (unsigned)(raw_header[3] & 0x0e) >> 1) {
|
| + case 0:
|
| + if(decoder->private_->has_stream_info)
|
| + decoder->private_->frame.header.bits_per_sample = decoder->private_->stream_info.data.stream_info.bits_per_sample;
|
| + else
|
| + is_unparseable = true;
|
| + break;
|
| + case 1:
|
| + decoder->private_->frame.header.bits_per_sample = 8;
|
| + break;
|
| + case 2:
|
| + decoder->private_->frame.header.bits_per_sample = 12;
|
| + break;
|
| + case 4:
|
| + decoder->private_->frame.header.bits_per_sample = 16;
|
| + break;
|
| + case 5:
|
| + decoder->private_->frame.header.bits_per_sample = 20;
|
| + break;
|
| + case 6:
|
| + decoder->private_->frame.header.bits_per_sample = 24;
|
| + break;
|
| + case 3:
|
| + case 7:
|
| + is_unparseable = true;
|
| + break;
|
| + default:
|
| + FLAC__ASSERT(0);
|
| + break;
|
| + }
|
| +
|
| + /* check to make sure that reserved bit is 0 */
|
| + if(raw_header[3] & 0x01) /* MAGIC NUMBER */
|
| + is_unparseable = true;
|
| +
|
| + /* read the frame's starting sample number (or frame number as the case may be) */
|
| + if(
|
| + raw_header[1] & 0x01 ||
|
| + /*@@@ this clause is a concession to the old way of doing variable blocksize; the only known implementation is flake and can probably be removed without inconveniencing anyone */
|
| + (decoder->private_->has_stream_info && decoder->private_->stream_info.data.stream_info.min_blocksize != decoder->private_->stream_info.data.stream_info.max_blocksize)
|
| + ) { /* variable blocksize */
|
| + if(!FLAC__bitreader_read_utf8_uint64(decoder->private_->input, &xx, raw_header, &raw_header_len))
|
| + return false; /* read_callback_ sets the state for us */
|
| + if(xx == FLAC__U64L(0xffffffffffffffff)) { /* i.e. non-UTF8 code... */
|
| + decoder->private_->lookahead = raw_header[raw_header_len-1]; /* back up as much as we can */
|
| + decoder->private_->cached = true;
|
| + send_error_to_client_(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_BAD_HEADER);
|
| + decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
|
| + return true;
|
| + }
|
| + decoder->private_->frame.header.number_type = FLAC__FRAME_NUMBER_TYPE_SAMPLE_NUMBER;
|
| + decoder->private_->frame.header.number.sample_number = xx;
|
| + }
|
| + else { /* fixed blocksize */
|
| + if(!FLAC__bitreader_read_utf8_uint32(decoder->private_->input, &x, raw_header, &raw_header_len))
|
| + return false; /* read_callback_ sets the state for us */
|
| + if(x == 0xffffffff) { /* i.e. non-UTF8 code... */
|
| + decoder->private_->lookahead = raw_header[raw_header_len-1]; /* back up as much as we can */
|
| + decoder->private_->cached = true;
|
| + send_error_to_client_(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_BAD_HEADER);
|
| + decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
|
| + return true;
|
| + }
|
| + decoder->private_->frame.header.number_type = FLAC__FRAME_NUMBER_TYPE_FRAME_NUMBER;
|
| + decoder->private_->frame.header.number.frame_number = x;
|
| + }
|
| +
|
| + if(blocksize_hint) {
|
| + if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, 8))
|
| + return false; /* read_callback_ sets the state for us */
|
| + raw_header[raw_header_len++] = (FLAC__byte)x;
|
| + if(blocksize_hint == 7) {
|
| + FLAC__uint32 _x;
|
| + if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &_x, 8))
|
| + return false; /* read_callback_ sets the state for us */
|
| + raw_header[raw_header_len++] = (FLAC__byte)_x;
|
| + x = (x << 8) | _x;
|
| + }
|
| + decoder->private_->frame.header.blocksize = x+1;
|
| + }
|
| +
|
| + if(sample_rate_hint) {
|
| + if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, 8))
|
| + return false; /* read_callback_ sets the state for us */
|
| + raw_header[raw_header_len++] = (FLAC__byte)x;
|
| + if(sample_rate_hint != 12) {
|
| + FLAC__uint32 _x;
|
| + if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &_x, 8))
|
| + return false; /* read_callback_ sets the state for us */
|
| + raw_header[raw_header_len++] = (FLAC__byte)_x;
|
| + x = (x << 8) | _x;
|
| + }
|
| + if(sample_rate_hint == 12)
|
| + decoder->private_->frame.header.sample_rate = x*1000;
|
| + else if(sample_rate_hint == 13)
|
| + decoder->private_->frame.header.sample_rate = x;
|
| + else
|
| + decoder->private_->frame.header.sample_rate = x*10;
|
| + }
|
| +
|
| + /* read the CRC-8 byte */
|
| + if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, 8))
|
| + return false; /* read_callback_ sets the state for us */
|
| + crc8 = (FLAC__byte)x;
|
| +
|
| + if(FLAC__crc8(raw_header, raw_header_len) != crc8) {
|
| + send_error_to_client_(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_BAD_HEADER);
|
| + decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
|
| + return true;
|
| + }
|
| +
|
| + /* calculate the sample number from the frame number if needed */
|
| + decoder->private_->next_fixed_block_size = 0;
|
| + if(decoder->private_->frame.header.number_type == FLAC__FRAME_NUMBER_TYPE_FRAME_NUMBER) {
|
| + x = decoder->private_->frame.header.number.frame_number;
|
| + decoder->private_->frame.header.number_type = FLAC__FRAME_NUMBER_TYPE_SAMPLE_NUMBER;
|
| + if(decoder->private_->fixed_block_size)
|
| + decoder->private_->frame.header.number.sample_number = (FLAC__uint64)decoder->private_->fixed_block_size * (FLAC__uint64)x;
|
| + else if(decoder->private_->has_stream_info) {
|
| + if(decoder->private_->stream_info.data.stream_info.min_blocksize == decoder->private_->stream_info.data.stream_info.max_blocksize) {
|
| + decoder->private_->frame.header.number.sample_number = (FLAC__uint64)decoder->private_->stream_info.data.stream_info.min_blocksize * (FLAC__uint64)x;
|
| + decoder->private_->next_fixed_block_size = decoder->private_->stream_info.data.stream_info.max_blocksize;
|
| + }
|
| + else
|
| + is_unparseable = true;
|
| + }
|
| + else if(x == 0) {
|
| + decoder->private_->frame.header.number.sample_number = 0;
|
| + decoder->private_->next_fixed_block_size = decoder->private_->frame.header.blocksize;
|
| + }
|
| + else {
|
| + /* can only get here if the stream has invalid frame numbering and no STREAMINFO, so assume it's not the last (possibly short) frame */
|
| + decoder->private_->frame.header.number.sample_number = (FLAC__uint64)decoder->private_->frame.header.blocksize * (FLAC__uint64)x;
|
| + }
|
| + }
|
| +
|
| + if(is_unparseable) {
|
| + send_error_to_client_(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_UNPARSEABLE_STREAM);
|
| + decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
|
| + return true;
|
| + }
|
| +
|
| + return true;
|
| +}
|
| +
|
| +FLAC__bool read_subframe_(FLAC__StreamDecoder *decoder, unsigned channel, unsigned bps, FLAC__bool do_full_decode)
|
| +{
|
| + FLAC__uint32 x;
|
| + FLAC__bool wasted_bits;
|
| + unsigned i;
|
| +
|
| + if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, 8)) /* MAGIC NUMBER */
|
| + return false; /* read_callback_ sets the state for us */
|
| +
|
| + wasted_bits = (x & 1);
|
| + x &= 0xfe;
|
| +
|
| + if(wasted_bits) {
|
| + unsigned u;
|
| + if(!FLAC__bitreader_read_unary_unsigned(decoder->private_->input, &u))
|
| + return false; /* read_callback_ sets the state for us */
|
| + decoder->private_->frame.subframes[channel].wasted_bits = u+1;
|
| + bps -= decoder->private_->frame.subframes[channel].wasted_bits;
|
| + }
|
| + else
|
| + decoder->private_->frame.subframes[channel].wasted_bits = 0;
|
| +
|
| + /*
|
| + * Lots of magic numbers here
|
| + */
|
| + if(x & 0x80) {
|
| + send_error_to_client_(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC);
|
| + decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
|
| + return true;
|
| + }
|
| + else if(x == 0) {
|
| + if(!read_subframe_constant_(decoder, channel, bps, do_full_decode))
|
| + return false;
|
| + }
|
| + else if(x == 2) {
|
| + if(!read_subframe_verbatim_(decoder, channel, bps, do_full_decode))
|
| + return false;
|
| + }
|
| + else if(x < 16) {
|
| + send_error_to_client_(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_UNPARSEABLE_STREAM);
|
| + decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
|
| + return true;
|
| + }
|
| + else if(x <= 24) {
|
| + if(!read_subframe_fixed_(decoder, channel, bps, (x>>1)&7, do_full_decode))
|
| + return false;
|
| + if(decoder->protected_->state == FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC) /* means bad sync or got corruption */
|
| + return true;
|
| + }
|
| + else if(x < 64) {
|
| + send_error_to_client_(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_UNPARSEABLE_STREAM);
|
| + decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
|
| + return true;
|
| + }
|
| + else {
|
| + if(!read_subframe_lpc_(decoder, channel, bps, ((x>>1)&31)+1, do_full_decode))
|
| + return false;
|
| + if(decoder->protected_->state == FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC) /* means bad sync or got corruption */
|
| + return true;
|
| + }
|
| +
|
| + if(wasted_bits && do_full_decode) {
|
| + x = decoder->private_->frame.subframes[channel].wasted_bits;
|
| + for(i = 0; i < decoder->private_->frame.header.blocksize; i++)
|
| + decoder->private_->output[channel][i] <<= x;
|
| + }
|
| +
|
| + return true;
|
| +}
|
| +
|
| +FLAC__bool read_subframe_constant_(FLAC__StreamDecoder *decoder, unsigned channel, unsigned bps, FLAC__bool do_full_decode)
|
| +{
|
| + FLAC__Subframe_Constant *subframe = &decoder->private_->frame.subframes[channel].data.constant;
|
| + FLAC__int32 x;
|
| + unsigned i;
|
| + FLAC__int32 *output = decoder->private_->output[channel];
|
| +
|
| + decoder->private_->frame.subframes[channel].type = FLAC__SUBFRAME_TYPE_CONSTANT;
|
| +
|
| + if(!FLAC__bitreader_read_raw_int32(decoder->private_->input, &x, bps))
|
| + return false; /* read_callback_ sets the state for us */
|
| +
|
| + subframe->value = x;
|
| +
|
| + /* decode the subframe */
|
| + if(do_full_decode) {
|
| + for(i = 0; i < decoder->private_->frame.header.blocksize; i++)
|
| + output[i] = x;
|
| + }
|
| +
|
| + return true;
|
| +}
|
| +
|
| +FLAC__bool read_subframe_fixed_(FLAC__StreamDecoder *decoder, unsigned channel, unsigned bps, const unsigned order, FLAC__bool do_full_decode)
|
| +{
|
| + FLAC__Subframe_Fixed *subframe = &decoder->private_->frame.subframes[channel].data.fixed;
|
| + FLAC__int32 i32;
|
| + FLAC__uint32 u32;
|
| + unsigned u;
|
| +
|
| + decoder->private_->frame.subframes[channel].type = FLAC__SUBFRAME_TYPE_FIXED;
|
| +
|
| + subframe->residual = decoder->private_->residual[channel];
|
| + subframe->order = order;
|
| +
|
| + /* read warm-up samples */
|
| + for(u = 0; u < order; u++) {
|
| + if(!FLAC__bitreader_read_raw_int32(decoder->private_->input, &i32, bps))
|
| + return false; /* read_callback_ sets the state for us */
|
| + subframe->warmup[u] = i32;
|
| + }
|
| +
|
| + /* read entropy coding method info */
|
| + if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &u32, FLAC__ENTROPY_CODING_METHOD_TYPE_LEN))
|
| + return false; /* read_callback_ sets the state for us */
|
| + subframe->entropy_coding_method.type = (FLAC__EntropyCodingMethodType)u32;
|
| + switch(subframe->entropy_coding_method.type) {
|
| + case FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE:
|
| + case FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE2:
|
| + if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &u32, FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ORDER_LEN))
|
| + return false; /* read_callback_ sets the state for us */
|
| + subframe->entropy_coding_method.data.partitioned_rice.order = u32;
|
| + subframe->entropy_coding_method.data.partitioned_rice.contents = &decoder->private_->partitioned_rice_contents[channel];
|
| + break;
|
| + default:
|
| + send_error_to_client_(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_UNPARSEABLE_STREAM);
|
| + decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
|
| + return true;
|
| + }
|
| +
|
| + /* read residual */
|
| + switch(subframe->entropy_coding_method.type) {
|
| + case FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE:
|
| + case FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE2:
|
| + if(!read_residual_partitioned_rice_(decoder, order, subframe->entropy_coding_method.data.partitioned_rice.order, &decoder->private_->partitioned_rice_contents[channel], decoder->private_->residual[channel], /*is_extended=*/subframe->entropy_coding_method.type == FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE2))
|
| + return false;
|
| + break;
|
| + default:
|
| + FLAC__ASSERT(0);
|
| + }
|
| +
|
| + /* decode the subframe */
|
| + if(do_full_decode) {
|
| + memcpy(decoder->private_->output[channel], subframe->warmup, sizeof(FLAC__int32) * order);
|
| + FLAC__fixed_restore_signal(decoder->private_->residual[channel], decoder->private_->frame.header.blocksize-order, order, decoder->private_->output[channel]+order);
|
| + }
|
| +
|
| + return true;
|
| +}
|
| +
|
| +FLAC__bool read_subframe_lpc_(FLAC__StreamDecoder *decoder, unsigned channel, unsigned bps, const unsigned order, FLAC__bool do_full_decode)
|
| +{
|
| + FLAC__Subframe_LPC *subframe = &decoder->private_->frame.subframes[channel].data.lpc;
|
| + FLAC__int32 i32;
|
| + FLAC__uint32 u32;
|
| + unsigned u;
|
| +
|
| + decoder->private_->frame.subframes[channel].type = FLAC__SUBFRAME_TYPE_LPC;
|
| +
|
| + subframe->residual = decoder->private_->residual[channel];
|
| + subframe->order = order;
|
| +
|
| + /* read warm-up samples */
|
| + for(u = 0; u < order; u++) {
|
| + if(!FLAC__bitreader_read_raw_int32(decoder->private_->input, &i32, bps))
|
| + return false; /* read_callback_ sets the state for us */
|
| + subframe->warmup[u] = i32;
|
| + }
|
| +
|
| + /* read qlp coeff precision */
|
| + if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &u32, FLAC__SUBFRAME_LPC_QLP_COEFF_PRECISION_LEN))
|
| + return false; /* read_callback_ sets the state for us */
|
| + if(u32 == (1u << FLAC__SUBFRAME_LPC_QLP_COEFF_PRECISION_LEN) - 1) {
|
| + send_error_to_client_(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC);
|
| + decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
|
| + return true;
|
| + }
|
| + subframe->qlp_coeff_precision = u32+1;
|
| +
|
| + /* read qlp shift */
|
| + if(!FLAC__bitreader_read_raw_int32(decoder->private_->input, &i32, FLAC__SUBFRAME_LPC_QLP_SHIFT_LEN))
|
| + return false; /* read_callback_ sets the state for us */
|
| + subframe->quantization_level = i32;
|
| +
|
| + /* read quantized lp coefficiencts */
|
| + for(u = 0; u < order; u++) {
|
| + if(!FLAC__bitreader_read_raw_int32(decoder->private_->input, &i32, subframe->qlp_coeff_precision))
|
| + return false; /* read_callback_ sets the state for us */
|
| + subframe->qlp_coeff[u] = i32;
|
| + }
|
| +
|
| + /* read entropy coding method info */
|
| + if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &u32, FLAC__ENTROPY_CODING_METHOD_TYPE_LEN))
|
| + return false; /* read_callback_ sets the state for us */
|
| + subframe->entropy_coding_method.type = (FLAC__EntropyCodingMethodType)u32;
|
| + switch(subframe->entropy_coding_method.type) {
|
| + case FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE:
|
| + case FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE2:
|
| + if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &u32, FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ORDER_LEN))
|
| + return false; /* read_callback_ sets the state for us */
|
| + subframe->entropy_coding_method.data.partitioned_rice.order = u32;
|
| + subframe->entropy_coding_method.data.partitioned_rice.contents = &decoder->private_->partitioned_rice_contents[channel];
|
| + break;
|
| + default:
|
| + send_error_to_client_(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_UNPARSEABLE_STREAM);
|
| + decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
|
| + return true;
|
| + }
|
| +
|
| + /* read residual */
|
| + switch(subframe->entropy_coding_method.type) {
|
| + case FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE:
|
| + case FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE2:
|
| + if(!read_residual_partitioned_rice_(decoder, order, subframe->entropy_coding_method.data.partitioned_rice.order, &decoder->private_->partitioned_rice_contents[channel], decoder->private_->residual[channel], /*is_extended=*/subframe->entropy_coding_method.type == FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE2))
|
| + return false;
|
| + break;
|
| + default:
|
| + FLAC__ASSERT(0);
|
| + }
|
| +
|
| + /* decode the subframe */
|
| + if(do_full_decode) {
|
| + memcpy(decoder->private_->output[channel], subframe->warmup, sizeof(FLAC__int32) * order);
|
| + /*@@@@@@ technically not pessimistic enough, should be more like
|
| + if( (FLAC__uint64)order * ((((FLAC__uint64)1)<<bps)-1) * ((1<<subframe->qlp_coeff_precision)-1) < (((FLAC__uint64)-1) << 32) )
|
| + */
|
| + if(bps + subframe->qlp_coeff_precision + FLAC__bitmath_ilog2(order) <= 32)
|
| + if(bps <= 16 && subframe->qlp_coeff_precision <= 16) {
|
| + if(order <= 8)
|
| + decoder->private_->local_lpc_restore_signal_16bit_order8(decoder->private_->residual[channel], decoder->private_->frame.header.blocksize-order, subframe->qlp_coeff, order, subframe->quantization_level, decoder->private_->output[channel]+order);
|
| + else
|
| + decoder->private_->local_lpc_restore_signal_16bit(decoder->private_->residual[channel], decoder->private_->frame.header.blocksize-order, subframe->qlp_coeff, order, subframe->quantization_level, decoder->private_->output[channel]+order);
|
| + }
|
| + else
|
| + decoder->private_->local_lpc_restore_signal(decoder->private_->residual[channel], decoder->private_->frame.header.blocksize-order, subframe->qlp_coeff, order, subframe->quantization_level, decoder->private_->output[channel]+order);
|
| + else
|
| + decoder->private_->local_lpc_restore_signal_64bit(decoder->private_->residual[channel], decoder->private_->frame.header.blocksize-order, subframe->qlp_coeff, order, subframe->quantization_level, decoder->private_->output[channel]+order);
|
| + }
|
| +
|
| + return true;
|
| +}
|
| +
|
| +FLAC__bool read_subframe_verbatim_(FLAC__StreamDecoder *decoder, unsigned channel, unsigned bps, FLAC__bool do_full_decode)
|
| +{
|
| + FLAC__Subframe_Verbatim *subframe = &decoder->private_->frame.subframes[channel].data.verbatim;
|
| + FLAC__int32 x, *residual = decoder->private_->residual[channel];
|
| + unsigned i;
|
| +
|
| + decoder->private_->frame.subframes[channel].type = FLAC__SUBFRAME_TYPE_VERBATIM;
|
| +
|
| + subframe->data = residual;
|
| +
|
| + for(i = 0; i < decoder->private_->frame.header.blocksize; i++) {
|
| + if(!FLAC__bitreader_read_raw_int32(decoder->private_->input, &x, bps))
|
| + return false; /* read_callback_ sets the state for us */
|
| + residual[i] = x;
|
| + }
|
| +
|
| + /* decode the subframe */
|
| + if(do_full_decode)
|
| + memcpy(decoder->private_->output[channel], subframe->data, sizeof(FLAC__int32) * decoder->private_->frame.header.blocksize);
|
| +
|
| + return true;
|
| +}
|
| +
|
| +FLAC__bool read_residual_partitioned_rice_(FLAC__StreamDecoder *decoder, unsigned predictor_order, unsigned partition_order, FLAC__EntropyCodingMethod_PartitionedRiceContents *partitioned_rice_contents, FLAC__int32 *residual, FLAC__bool is_extended)
|
| +{
|
| + FLAC__uint32 rice_parameter;
|
| + int i;
|
| + unsigned partition, sample, u;
|
| + const unsigned partitions = 1u << partition_order;
|
| + const unsigned partition_samples = partition_order > 0? decoder->private_->frame.header.blocksize >> partition_order : decoder->private_->frame.header.blocksize - predictor_order;
|
| + const unsigned plen = is_extended? FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE2_PARAMETER_LEN : FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_PARAMETER_LEN;
|
| + const unsigned pesc = is_extended? FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE2_ESCAPE_PARAMETER : FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER;
|
| +
|
| + /* sanity checks */
|
| + if(partition_order == 0) {
|
| + if(decoder->private_->frame.header.blocksize < predictor_order) {
|
| + send_error_to_client_(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC);
|
| + decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
|
| + return true;
|
| + }
|
| + }
|
| + else {
|
| + if(partition_samples < predictor_order) {
|
| + send_error_to_client_(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC);
|
| + decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
|
| + return true;
|
| + }
|
| + }
|
| +
|
| + if(!FLAC__format_entropy_coding_method_partitioned_rice_contents_ensure_size(partitioned_rice_contents, max(6, partition_order))) {
|
| + decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
|
| + return false;
|
| + }
|
| +
|
| + sample = 0;
|
| + for(partition = 0; partition < partitions; partition++) {
|
| + if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &rice_parameter, plen))
|
| + return false; /* read_callback_ sets the state for us */
|
| + partitioned_rice_contents->parameters[partition] = rice_parameter;
|
| + if(rice_parameter < pesc) {
|
| + partitioned_rice_contents->raw_bits[partition] = 0;
|
| + u = (partition_order == 0 || partition > 0)? partition_samples : partition_samples - predictor_order;
|
| + if(!decoder->private_->local_bitreader_read_rice_signed_block(decoder->private_->input, residual + sample, u, rice_parameter))
|
| + return false; /* read_callback_ sets the state for us */
|
| + sample += u;
|
| + }
|
| + else {
|
| + if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &rice_parameter, FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_RAW_LEN))
|
| + return false; /* read_callback_ sets the state for us */
|
| + partitioned_rice_contents->raw_bits[partition] = rice_parameter;
|
| + for(u = (partition_order == 0 || partition > 0)? 0 : predictor_order; u < partition_samples; u++, sample++) {
|
| + if(!FLAC__bitreader_read_raw_int32(decoder->private_->input, &i, rice_parameter))
|
| + return false; /* read_callback_ sets the state for us */
|
| + residual[sample] = i;
|
| + }
|
| + }
|
| + }
|
| +
|
| + return true;
|
| +}
|
| +
|
| +FLAC__bool read_zero_padding_(FLAC__StreamDecoder *decoder)
|
| +{
|
| + if(!FLAC__bitreader_is_consumed_byte_aligned(decoder->private_->input)) {
|
| + FLAC__uint32 zero = 0;
|
| + if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &zero, FLAC__bitreader_bits_left_for_byte_alignment(decoder->private_->input)))
|
| + return false; /* read_callback_ sets the state for us */
|
| + if(zero != 0) {
|
| + send_error_to_client_(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC);
|
| + decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
|
| + }
|
| + }
|
| + return true;
|
| +}
|
| +
|
| +FLAC__bool read_callback_(FLAC__byte buffer[], size_t *bytes, void *client_data)
|
| +{
|
| + FLAC__StreamDecoder *decoder = (FLAC__StreamDecoder *)client_data;
|
| +
|
| + if(
|
| +#if FLAC__HAS_OGG
|
| + /* see [1] HACK NOTE below for why we don't call the eof_callback when decoding Ogg FLAC */
|
| + !decoder->private_->is_ogg &&
|
| +#endif
|
| + decoder->private_->eof_callback && decoder->private_->eof_callback(decoder, decoder->private_->client_data)
|
| + ) {
|
| + *bytes = 0;
|
| + decoder->protected_->state = FLAC__STREAM_DECODER_END_OF_STREAM;
|
| + return false;
|
| + }
|
| + else if(*bytes > 0) {
|
| + /* While seeking, it is possible for our seek to land in the
|
| + * middle of audio data that looks exactly like a frame header
|
| + * from a future version of an encoder. When that happens, our
|
| + * error callback will get an
|
| + * FLAC__STREAM_DECODER_UNPARSEABLE_STREAM and increment its
|
| + * unparseable_frame_count. But there is a remote possibility
|
| + * that it is properly synced at such a "future-codec frame",
|
| + * so to make sure, we wait to see many "unparseable" errors in
|
| + * a row before bailing out.
|
| + */
|
| + if(decoder->private_->is_seeking && decoder->private_->unparseable_frame_count > 20) {
|
| + decoder->protected_->state = FLAC__STREAM_DECODER_ABORTED;
|
| + return false;
|
| + }
|
| + else {
|
| + const FLAC__StreamDecoderReadStatus status =
|
| +#if FLAC__HAS_OGG
|
| + decoder->private_->is_ogg?
|
| + read_callback_ogg_aspect_(decoder, buffer, bytes) :
|
| +#endif
|
| + decoder->private_->read_callback(decoder, buffer, bytes, decoder->private_->client_data)
|
| + ;
|
| + if(status == FLAC__STREAM_DECODER_READ_STATUS_ABORT) {
|
| + decoder->protected_->state = FLAC__STREAM_DECODER_ABORTED;
|
| + return false;
|
| + }
|
| + else if(*bytes == 0) {
|
| + if(
|
| + status == FLAC__STREAM_DECODER_READ_STATUS_END_OF_STREAM ||
|
| + (
|
| +#if FLAC__HAS_OGG
|
| + /* see [1] HACK NOTE below for why we don't call the eof_callback when decoding Ogg FLAC */
|
| + !decoder->private_->is_ogg &&
|
| +#endif
|
| + decoder->private_->eof_callback && decoder->private_->eof_callback(decoder, decoder->private_->client_data)
|
| + )
|
| + ) {
|
| + decoder->protected_->state = FLAC__STREAM_DECODER_END_OF_STREAM;
|
| + return false;
|
| + }
|
| + else
|
| + return true;
|
| + }
|
| + else
|
| + return true;
|
| + }
|
| + }
|
| + else {
|
| + /* abort to avoid a deadlock */
|
| + decoder->protected_->state = FLAC__STREAM_DECODER_ABORTED;
|
| + return false;
|
| + }
|
| + /* [1] @@@ HACK NOTE: The end-of-stream checking has to be hacked around
|
| + * for Ogg FLAC. This is because the ogg decoder aspect can lose sync
|
| + * and at the same time hit the end of the stream (for example, seeking
|
| + * to a point that is after the beginning of the last Ogg page). There
|
| + * is no way to report an Ogg sync loss through the callbacks (see note
|
| + * in read_callback_ogg_aspect_()) so it returns CONTINUE with *bytes==0.
|
| + * So to keep the decoder from stopping at this point we gate the call
|
| + * to the eof_callback and let the Ogg decoder aspect set the
|
| + * end-of-stream state when it is needed.
|
| + */
|
| +}
|
| +
|
| +#if FLAC__HAS_OGG
|
| +FLAC__StreamDecoderReadStatus read_callback_ogg_aspect_(const FLAC__StreamDecoder *decoder, FLAC__byte buffer[], size_t *bytes)
|
| +{
|
| + switch(FLAC__ogg_decoder_aspect_read_callback_wrapper(&decoder->protected_->ogg_decoder_aspect, buffer, bytes, read_callback_proxy_, decoder, decoder->private_->client_data)) {
|
| + case FLAC__OGG_DECODER_ASPECT_READ_STATUS_OK:
|
| + return FLAC__STREAM_DECODER_READ_STATUS_CONTINUE;
|
| + /* we don't really have a way to handle lost sync via read
|
| + * callback so we'll let it pass and let the underlying
|
| + * FLAC decoder catch the error
|
| + */
|
| + case FLAC__OGG_DECODER_ASPECT_READ_STATUS_LOST_SYNC:
|
| + return FLAC__STREAM_DECODER_READ_STATUS_CONTINUE;
|
| + case FLAC__OGG_DECODER_ASPECT_READ_STATUS_END_OF_STREAM:
|
| + return FLAC__STREAM_DECODER_READ_STATUS_END_OF_STREAM;
|
| + case FLAC__OGG_DECODER_ASPECT_READ_STATUS_NOT_FLAC:
|
| + case FLAC__OGG_DECODER_ASPECT_READ_STATUS_UNSUPPORTED_MAPPING_VERSION:
|
| + case FLAC__OGG_DECODER_ASPECT_READ_STATUS_ABORT:
|
| + case FLAC__OGG_DECODER_ASPECT_READ_STATUS_ERROR:
|
| + case FLAC__OGG_DECODER_ASPECT_READ_STATUS_MEMORY_ALLOCATION_ERROR:
|
| + return FLAC__STREAM_DECODER_READ_STATUS_ABORT;
|
| + default:
|
| + FLAC__ASSERT(0);
|
| + /* double protection */
|
| + return FLAC__STREAM_DECODER_READ_STATUS_ABORT;
|
| + }
|
| +}
|
| +
|
| +FLAC__OggDecoderAspectReadStatus read_callback_proxy_(const void *void_decoder, FLAC__byte buffer[], size_t *bytes, void *client_data)
|
| +{
|
| + FLAC__StreamDecoder *decoder = (FLAC__StreamDecoder*)void_decoder;
|
| +
|
| + switch(decoder->private_->read_callback(decoder, buffer, bytes, client_data)) {
|
| + case FLAC__STREAM_DECODER_READ_STATUS_CONTINUE:
|
| + return FLAC__OGG_DECODER_ASPECT_READ_STATUS_OK;
|
| + case FLAC__STREAM_DECODER_READ_STATUS_END_OF_STREAM:
|
| + return FLAC__OGG_DECODER_ASPECT_READ_STATUS_END_OF_STREAM;
|
| + case FLAC__STREAM_DECODER_READ_STATUS_ABORT:
|
| + return FLAC__OGG_DECODER_ASPECT_READ_STATUS_ABORT;
|
| + default:
|
| + /* double protection: */
|
| + FLAC__ASSERT(0);
|
| + return FLAC__OGG_DECODER_ASPECT_READ_STATUS_ABORT;
|
| + }
|
| +}
|
| +#endif
|
| +
|
| +FLAC__StreamDecoderWriteStatus write_audio_frame_to_client_(FLAC__StreamDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 * const buffer[])
|
| +{
|
| + if(decoder->private_->is_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 = decoder->private_->target_sample;
|
| +
|
| + FLAC__ASSERT(frame->header.number_type == FLAC__FRAME_NUMBER_TYPE_SAMPLE_NUMBER);
|
| +
|
| +#if FLAC__HAS_OGG
|
| + decoder->private_->got_a_frame = true;
|
| +#endif
|
| + 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 */
|
| + decoder->private_->is_seeking = false;
|
| + /* 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;
|
| + decoder->private_->last_frame.header.blocksize -= delta;
|
| + decoder->private_->last_frame.header.number.sample_number += (FLAC__uint64)delta;
|
| + /* write the relevant samples */
|
| + return decoder->private_->write_callback(decoder, &decoder->private_->last_frame, newbuffer, decoder->private_->client_data);
|
| + }
|
| + else {
|
| + /* write the relevant samples */
|
| + return decoder->private_->write_callback(decoder, frame, buffer, decoder->private_->client_data);
|
| + }
|
| + }
|
| + else {
|
| + return FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE;
|
| + }
|
| + }
|
| + else {
|
| + /*
|
| + * If we never got STREAMINFO, turn off MD5 checking to save
|
| + * cycles since we don't have a sum to compare to anyway
|
| + */
|
| + if(!decoder->private_->has_stream_info)
|
| + decoder->private_->do_md5_checking = false;
|
| + if(decoder->private_->do_md5_checking) {
|
| + if(!FLAC__MD5Accumulate(&decoder->private_->md5context, buffer, frame->header.channels, frame->header.blocksize, (frame->header.bits_per_sample+7) / 8))
|
| + return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT;
|
| + }
|
| + return decoder->private_->write_callback(decoder, frame, buffer, decoder->private_->client_data);
|
| + }
|
| +}
|
| +
|
| +void send_error_to_client_(const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status)
|
| +{
|
| + if(!decoder->private_->is_seeking)
|
| + decoder->private_->error_callback(decoder, status, decoder->private_->client_data);
|
| + else if(status == FLAC__STREAM_DECODER_ERROR_STATUS_UNPARSEABLE_STREAM)
|
| + decoder->private_->unparseable_frame_count++;
|
| +}
|
| +
|
| +FLAC__bool seek_to_absolute_sample_(FLAC__StreamDecoder *decoder, FLAC__uint64 stream_length, FLAC__uint64 target_sample)
|
| +{
|
| + FLAC__uint64 first_frame_offset = decoder->private_->first_frame_offset, lower_bound, upper_bound, lower_bound_sample, upper_bound_sample, this_frame_sample;
|
| + FLAC__int64 pos = -1;
|
| + int i;
|
| + unsigned approx_bytes_per_frame;
|
| + FLAC__bool first_seek = true;
|
| + const FLAC__uint64 total_samples = FLAC__stream_decoder_get_total_samples(decoder);
|
| + const unsigned min_blocksize = decoder->private_->stream_info.data.stream_info.min_blocksize;
|
| + const unsigned max_blocksize = decoder->private_->stream_info.data.stream_info.max_blocksize;
|
| + const unsigned max_framesize = decoder->private_->stream_info.data.stream_info.max_framesize;
|
| + const unsigned min_framesize = decoder->private_->stream_info.data.stream_info.min_framesize;
|
| + /* take these from the current frame in case they've changed mid-stream */
|
| + unsigned channels = FLAC__stream_decoder_get_channels(decoder);
|
| + unsigned bps = FLAC__stream_decoder_get_bits_per_sample(decoder);
|
| + const FLAC__StreamMetadata_SeekTable *seek_table = decoder->private_->has_seek_table? &decoder->private_->seek_table.data.seek_table : 0;
|
| +
|
| + /* use values from stream info if we didn't decode a frame */
|
| + if(channels == 0)
|
| + channels = decoder->private_->stream_info.data.stream_info.channels;
|
| + if(bps == 0)
|
| + bps = decoder->private_->stream_info.data.stream_info.bits_per_sample;
|
| +
|
| + /* we are just guessing here */
|
| + if(max_framesize > 0)
|
| + approx_bytes_per_frame = (max_framesize + min_framesize) / 2 + 1;
|
| + /*
|
| + * Check if it's a known fixed-blocksize stream. Note that though
|
| + * the spec doesn't allow zeroes in the STREAMINFO block, we may
|
| + * never get a STREAMINFO block when decoding so the value of
|
| + * min_blocksize might be zero.
|
| + */
|
| + else if(min_blocksize == max_blocksize && min_blocksize > 0) {
|
| + /* note there are no () around 'bps/8' to keep precision up since it's an integer calulation */
|
| + approx_bytes_per_frame = min_blocksize * channels * bps/8 + 64;
|
| + }
|
| + else
|
| + approx_bytes_per_frame = 4096 * channels * bps/8 + 64;
|
| +
|
| + /*
|
| + * 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 frame and end of the stream.
|
| + */
|
| + lower_bound = first_frame_offset;
|
| + lower_bound_sample = 0;
|
| + upper_bound = stream_length;
|
| + upper_bound_sample = total_samples > 0 ? total_samples : target_sample /*estimate it*/;
|
| +
|
| + /*
|
| + * 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.
|
| + *
|
| + * Note: to protect against invalid seek tables we will ignore points
|
| + * that have frame_samples==0 or sample_number>=total_samples
|
| + */
|
| + if(seek_table) {
|
| + FLAC__uint64 new_lower_bound = lower_bound;
|
| + FLAC__uint64 new_upper_bound = upper_bound;
|
| + FLAC__uint64 new_lower_bound_sample = lower_bound_sample;
|
| + FLAC__uint64 new_upper_bound_sample = upper_bound_sample;
|
| +
|
| + /* find the closest seek point <= target_sample, if it exists */
|
| + for(i = (int)seek_table->num_points - 1; i >= 0; i--) {
|
| + if(
|
| + seek_table->points[i].sample_number != FLAC__STREAM_METADATA_SEEKPOINT_PLACEHOLDER &&
|
| + seek_table->points[i].frame_samples > 0 && /* defense against bad seekpoints */
|
| + (total_samples <= 0 || seek_table->points[i].sample_number < total_samples) && /* defense against bad seekpoints */
|
| + seek_table->points[i].sample_number <= target_sample
|
| + )
|
| + break;
|
| + }
|
| + if(i >= 0) { /* i.e. we found a suitable seek point... */
|
| + new_lower_bound = first_frame_offset + seek_table->points[i].stream_offset;
|
| + new_lower_bound_sample = seek_table->points[i].sample_number;
|
| + }
|
| +
|
| + /* find the closest seek point > target_sample, if it exists */
|
| + for(i = 0; i < (int)seek_table->num_points; i++) {
|
| + if(
|
| + seek_table->points[i].sample_number != FLAC__STREAM_METADATA_SEEKPOINT_PLACEHOLDER &&
|
| + seek_table->points[i].frame_samples > 0 && /* defense against bad seekpoints */
|
| + (total_samples <= 0 || seek_table->points[i].sample_number < total_samples) && /* defense against bad seekpoints */
|
| + seek_table->points[i].sample_number > target_sample
|
| + )
|
| + break;
|
| + }
|
| + if(i < (int)seek_table->num_points) { /* i.e. we found a suitable seek point... */
|
| + new_upper_bound = first_frame_offset + seek_table->points[i].stream_offset;
|
| + new_upper_bound_sample = seek_table->points[i].sample_number;
|
| + }
|
| + /* final protection against unsorted seek tables; keep original values if bogus */
|
| + if(new_upper_bound >= new_lower_bound) {
|
| + lower_bound = new_lower_bound;
|
| + upper_bound = new_upper_bound;
|
| + lower_bound_sample = new_lower_bound_sample;
|
| + upper_bound_sample = new_upper_bound_sample;
|
| + }
|
| + }
|
| +
|
| + FLAC__ASSERT(upper_bound_sample >= lower_bound_sample);
|
| + /* there are 2 insidious ways that the following equality occurs, which
|
| + * we need to fix:
|
| + * 1) total_samples is 0 (unknown) and target_sample is 0
|
| + * 2) total_samples is 0 (unknown) and target_sample happens to be
|
| + * exactly equal to the last seek point in the seek table; this
|
| + * means there is no seek point above it, and upper_bound_samples
|
| + * remains equal to the estimate (of target_samples) we made above
|
| + * in either case it does not hurt to move upper_bound_sample up by 1
|
| + */
|
| + if(upper_bound_sample == lower_bound_sample)
|
| + upper_bound_sample++;
|
| +
|
| + decoder->private_->target_sample = target_sample;
|
| + while(1) {
|
| + /* check if the bounds are still ok */
|
| + if (lower_bound_sample >= upper_bound_sample || lower_bound > upper_bound) {
|
| + decoder->protected_->state = FLAC__STREAM_DECODER_SEEK_ERROR;
|
| + return false;
|
| + }
|
| +#ifndef FLAC__INTEGER_ONLY_LIBRARY
|
| +#if defined _MSC_VER || defined __MINGW32__
|
| + /* with VC++ you have to spoon feed it the casting */
|
| + pos = (FLAC__int64)lower_bound + (FLAC__int64)((FLAC__double)(FLAC__int64)(target_sample - lower_bound_sample) / (FLAC__double)(FLAC__int64)(upper_bound_sample - lower_bound_sample) * (FLAC__double)(FLAC__int64)(upper_bound - lower_bound)) - approx_bytes_per_frame;
|
| +#else
|
| + pos = (FLAC__int64)lower_bound + (FLAC__int64)((FLAC__double)(target_sample - lower_bound_sample) / (FLAC__double)(upper_bound_sample - lower_bound_sample) * (FLAC__double)(upper_bound - lower_bound)) - approx_bytes_per_frame;
|
| +#endif
|
| +#else
|
| + /* a little less accurate: */
|
| + if(upper_bound - lower_bound < 0xffffffff)
|
| + pos = (FLAC__int64)lower_bound + (FLAC__int64)(((target_sample - lower_bound_sample) * (upper_bound - lower_bound)) / (upper_bound_sample - lower_bound_sample)) - approx_bytes_per_frame;
|
| + else /* @@@ WATCHOUT, ~2TB limit */
|
| + pos = (FLAC__int64)lower_bound + (FLAC__int64)((((target_sample - lower_bound_sample)>>8) * ((upper_bound - lower_bound)>>8)) / ((upper_bound_sample - lower_bound_sample)>>16)) - approx_bytes_per_frame;
|
| +#endif
|
| + if(pos >= (FLAC__int64)upper_bound)
|
| + pos = (FLAC__int64)upper_bound - 1;
|
| + if(pos < (FLAC__int64)lower_bound)
|
| + pos = (FLAC__int64)lower_bound;
|
| + if(decoder->private_->seek_callback(decoder, (FLAC__uint64)pos, decoder->private_->client_data) != FLAC__STREAM_DECODER_SEEK_STATUS_OK) {
|
| + decoder->protected_->state = FLAC__STREAM_DECODER_SEEK_ERROR;
|
| + return false;
|
| + }
|
| + if(!FLAC__stream_decoder_flush(decoder)) {
|
| + /* above call sets the state for us */
|
| + return false;
|
| + }
|
| + /* Now we need to get a frame. First we need to reset our
|
| + * unparseable_frame_count; if we get too many unparseable
|
| + * frames in a row, the read callback will return
|
| + * FLAC__STREAM_DECODER_READ_STATUS_ABORT, causing
|
| + * FLAC__stream_decoder_process_single() to return false.
|
| + */
|
| + decoder->private_->unparseable_frame_count = 0;
|
| + if(!FLAC__stream_decoder_process_single(decoder)) {
|
| + decoder->protected_->state = FLAC__STREAM_DECODER_SEEK_ERROR;
|
| + return false;
|
| + }
|
| + /* our write callback will change the state when it gets to the target frame */
|
| + /* actually, we could have got_a_frame if our decoder is at FLAC__STREAM_DECODER_END_OF_STREAM so we need to check for that also */
|
| +#if 0
|
| + /*@@@@@@ used to be the following; not clear if the check for end of stream is needed anymore */
|
| + if(decoder->protected_->state != FLAC__SEEKABLE_STREAM_DECODER_SEEKING && decoder->protected_->state != FLAC__STREAM_DECODER_END_OF_STREAM)
|
| + break;
|
| +#endif
|
| + if(!decoder->private_->is_seeking)
|
| + break;
|
| +
|
| + FLAC__ASSERT(decoder->private_->last_frame.header.number_type == FLAC__FRAME_NUMBER_TYPE_SAMPLE_NUMBER);
|
| + this_frame_sample = decoder->private_->last_frame.header.number.sample_number;
|
| +
|
| + if (0 == decoder->private_->samples_decoded || (this_frame_sample + decoder->private_->last_frame.header.blocksize >= upper_bound_sample && !first_seek)) {
|
| + if (pos == (FLAC__int64)lower_bound) {
|
| + /* can't move back any more than the first frame, something is fatally wrong */
|
| + decoder->protected_->state = FLAC__STREAM_DECODER_SEEK_ERROR;
|
| + return false;
|
| + }
|
| + /* our last move backwards wasn't big enough, try again */
|
| + approx_bytes_per_frame = approx_bytes_per_frame? approx_bytes_per_frame * 2 : 16;
|
| + continue;
|
| + }
|
| + /* allow one seek over upper bound, so we can get a correct upper_bound_sample for streams with unknown total_samples */
|
| + first_seek = false;
|
| +
|
| + /* make sure we are not seeking in corrupted stream */
|
| + if (this_frame_sample < lower_bound_sample) {
|
| + decoder->protected_->state = FLAC__STREAM_DECODER_SEEK_ERROR;
|
| + return false;
|
| + }
|
| +
|
| + /* we need to narrow the search */
|
| + if(target_sample < this_frame_sample) {
|
| + upper_bound_sample = this_frame_sample + decoder->private_->last_frame.header.blocksize;
|
| +/*@@@@@@ what will decode position be if at end of stream? */
|
| + if(!FLAC__stream_decoder_get_decode_position(decoder, &upper_bound)) {
|
| + decoder->protected_->state = FLAC__STREAM_DECODER_SEEK_ERROR;
|
| + return false;
|
| + }
|
| + approx_bytes_per_frame = (unsigned)(2 * (upper_bound - pos) / 3 + 16);
|
| + }
|
| + else { /* target_sample >= this_frame_sample + this frame's blocksize */
|
| + lower_bound_sample = this_frame_sample + decoder->private_->last_frame.header.blocksize;
|
| + if(!FLAC__stream_decoder_get_decode_position(decoder, &lower_bound)) {
|
| + decoder->protected_->state = FLAC__STREAM_DECODER_SEEK_ERROR;
|
| + return false;
|
| + }
|
| + approx_bytes_per_frame = (unsigned)(2 * (lower_bound - pos) / 3 + 16);
|
| + }
|
| + }
|
| +
|
| + return true;
|
| +}
|
| +
|
| +#if FLAC__HAS_OGG
|
| +FLAC__bool seek_to_absolute_sample_ogg_(FLAC__StreamDecoder *decoder, FLAC__uint64 stream_length, FLAC__uint64 target_sample)
|
| +{
|
| + FLAC__uint64 left_pos = 0, right_pos = stream_length;
|
| + FLAC__uint64 left_sample = 0, right_sample = FLAC__stream_decoder_get_total_samples(decoder);
|
| + FLAC__uint64 this_frame_sample = (FLAC__uint64)0 - 1;
|
| + FLAC__uint64 pos = 0; /* only initialized to avoid compiler warning */
|
| + FLAC__bool did_a_seek;
|
| + unsigned iteration = 0;
|
| +
|
| + /* In the first iterations, we will calculate the target byte position
|
| + * by the distance from the target sample to left_sample and
|
| + * right_sample (let's call it "proportional search"). After that, we
|
| + * will switch to binary search.
|
| + */
|
| + unsigned BINARY_SEARCH_AFTER_ITERATION = 2;
|
| +
|
| + /* We will switch to a linear search once our current sample is less
|
| + * than this number of samples ahead of the target sample
|
| + */
|
| + static const FLAC__uint64 LINEAR_SEARCH_WITHIN_SAMPLES = FLAC__MAX_BLOCK_SIZE * 2;
|
| +
|
| + /* If the total number of samples is unknown, use a large value, and
|
| + * force binary search immediately.
|
| + */
|
| + if(right_sample == 0) {
|
| + right_sample = (FLAC__uint64)(-1);
|
| + BINARY_SEARCH_AFTER_ITERATION = 0;
|
| + }
|
| +
|
| + decoder->private_->target_sample = target_sample;
|
| + for( ; ; iteration++) {
|
| + if (iteration == 0 || this_frame_sample > target_sample || target_sample - this_frame_sample > LINEAR_SEARCH_WITHIN_SAMPLES) {
|
| + if (iteration >= BINARY_SEARCH_AFTER_ITERATION) {
|
| + pos = (right_pos + left_pos) / 2;
|
| + }
|
| + else {
|
| +#ifndef FLAC__INTEGER_ONLY_LIBRARY
|
| +#if defined _MSC_VER || defined __MINGW32__
|
| + /* with MSVC you have to spoon feed it the casting */
|
| + pos = (FLAC__uint64)((FLAC__double)(FLAC__int64)(target_sample - left_sample) / (FLAC__double)(FLAC__int64)(right_sample - left_sample) * (FLAC__double)(FLAC__int64)(right_pos - left_pos));
|
| +#else
|
| + pos = (FLAC__uint64)((FLAC__double)(target_sample - left_sample) / (FLAC__double)(right_sample - left_sample) * (FLAC__double)(right_pos - left_pos));
|
| +#endif
|
| +#else
|
| + /* a little less accurate: */
|
| + if ((target_sample-left_sample <= 0xffffffff) && (right_pos-left_pos <= 0xffffffff))
|
| + pos = (FLAC__int64)(((target_sample-left_sample) * (right_pos-left_pos)) / (right_sample-left_sample));
|
| + else /* @@@ WATCHOUT, ~2TB limit */
|
| + pos = (FLAC__int64)((((target_sample-left_sample)>>8) * ((right_pos-left_pos)>>8)) / ((right_sample-left_sample)>>16));
|
| +#endif
|
| + /* @@@ TODO: might want to limit pos to some distance
|
| + * before EOF, to make sure we land before the last frame,
|
| + * thereby getting a this_frame_sample and so having a better
|
| + * estimate.
|
| + */
|
| + }
|
| +
|
| + /* physical seek */
|
| + if(decoder->private_->seek_callback((FLAC__StreamDecoder*)decoder, (FLAC__uint64)pos, decoder->private_->client_data) != FLAC__STREAM_DECODER_SEEK_STATUS_OK) {
|
| + decoder->protected_->state = FLAC__STREAM_DECODER_SEEK_ERROR;
|
| + return false;
|
| + }
|
| + if(!FLAC__stream_decoder_flush(decoder)) {
|
| + /* above call sets the state for us */
|
| + return false;
|
| + }
|
| + did_a_seek = true;
|
| + }
|
| + else
|
| + did_a_seek = false;
|
| +
|
| + decoder->private_->got_a_frame = false;
|
| + if(!FLAC__stream_decoder_process_single(decoder)) {
|
| + decoder->protected_->state = FLAC__STREAM_DECODER_SEEK_ERROR;
|
| + return false;
|
| + }
|
| + if(!decoder->private_->got_a_frame) {
|
| + if(did_a_seek) {
|
| + /* this can happen if we seek to a point after the last frame; we drop
|
| + * to binary search right away in this case to avoid any wasted
|
| + * iterations of proportional search.
|
| + */
|
| + right_pos = pos;
|
| + BINARY_SEARCH_AFTER_ITERATION = 0;
|
| + }
|
| + else {
|
| + /* this can probably only happen if total_samples is unknown and the
|
| + * target_sample is past the end of the stream
|
| + */
|
| + decoder->protected_->state = FLAC__STREAM_DECODER_SEEK_ERROR;
|
| + return false;
|
| + }
|
| + }
|
| + /* our write callback will change the state when it gets to the target frame */
|
| + else if(!decoder->private_->is_seeking) {
|
| + break;
|
| + }
|
| + else {
|
| + 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 (did_a_seek) {
|
| + if (this_frame_sample <= target_sample) {
|
| + /* The 'equal' case should not happen, since
|
| + * FLAC__stream_decoder_process_single()
|
| + * should recognize that it has hit the
|
| + * target sample and we would exit through
|
| + * the 'break' above.
|
| + */
|
| + FLAC__ASSERT(this_frame_sample != target_sample);
|
| +
|
| + left_sample = this_frame_sample;
|
| + /* sanity check to avoid infinite loop */
|
| + if (left_pos == pos) {
|
| + decoder->protected_->state = FLAC__STREAM_DECODER_SEEK_ERROR;
|
| + return false;
|
| + }
|
| + left_pos = pos;
|
| + }
|
| + else if(this_frame_sample > target_sample) {
|
| + right_sample = this_frame_sample;
|
| + /* sanity check to avoid infinite loop */
|
| + if (right_pos == pos) {
|
| + decoder->protected_->state = FLAC__STREAM_DECODER_SEEK_ERROR;
|
| + return false;
|
| + }
|
| + right_pos = pos;
|
| + }
|
| + }
|
| + }
|
| + }
|
| +
|
| + return true;
|
| +}
|
| +#endif
|
| +
|
| +FLAC__StreamDecoderReadStatus file_read_callback_(const FLAC__StreamDecoder *decoder, FLAC__byte buffer[], size_t *bytes, void *client_data)
|
| +{
|
| + (void)client_data;
|
| +
|
| + if(*bytes > 0) {
|
| + *bytes = fread(buffer, sizeof(FLAC__byte), *bytes, decoder->private_->file);
|
| + if(ferror(decoder->private_->file))
|
| + return FLAC__STREAM_DECODER_READ_STATUS_ABORT;
|
| + else if(*bytes == 0)
|
| + return FLAC__STREAM_DECODER_READ_STATUS_END_OF_STREAM;
|
| + else
|
| + return FLAC__STREAM_DECODER_READ_STATUS_CONTINUE;
|
| + }
|
| + else
|
| + return FLAC__STREAM_DECODER_READ_STATUS_ABORT; /* abort to avoid a deadlock */
|
| +}
|
| +
|
| +FLAC__StreamDecoderSeekStatus file_seek_callback_(const FLAC__StreamDecoder *decoder, FLAC__uint64 absolute_byte_offset, void *client_data)
|
| +{
|
| + (void)client_data;
|
| +
|
| + if(decoder->private_->file == stdin)
|
| + return FLAC__STREAM_DECODER_SEEK_STATUS_UNSUPPORTED;
|
| + else if(fseeko(decoder->private_->file, (off_t)absolute_byte_offset, SEEK_SET) < 0)
|
| + return FLAC__STREAM_DECODER_SEEK_STATUS_ERROR;
|
| + else
|
| + return FLAC__STREAM_DECODER_SEEK_STATUS_OK;
|
| +}
|
| +
|
| +FLAC__StreamDecoderTellStatus file_tell_callback_(const FLAC__StreamDecoder *decoder, FLAC__uint64 *absolute_byte_offset, void *client_data)
|
| +{
|
| + off_t pos;
|
| + (void)client_data;
|
| +
|
| + if(decoder->private_->file == stdin)
|
| + return FLAC__STREAM_DECODER_TELL_STATUS_UNSUPPORTED;
|
| + else if((pos = ftello(decoder->private_->file)) < 0)
|
| + return FLAC__STREAM_DECODER_TELL_STATUS_ERROR;
|
| + else {
|
| + *absolute_byte_offset = (FLAC__uint64)pos;
|
| + return FLAC__STREAM_DECODER_TELL_STATUS_OK;
|
| + }
|
| +}
|
| +
|
| +FLAC__StreamDecoderLengthStatus file_length_callback_(const FLAC__StreamDecoder *decoder, FLAC__uint64 *stream_length, void *client_data)
|
| +{
|
| + struct stat filestats;
|
| + (void)client_data;
|
| +
|
| + if(decoder->private_->file == stdin)
|
| + return FLAC__STREAM_DECODER_LENGTH_STATUS_UNSUPPORTED;
|
| + else if(fstat(fileno(decoder->private_->file), &filestats) != 0)
|
| + return FLAC__STREAM_DECODER_LENGTH_STATUS_ERROR;
|
| + else {
|
| + *stream_length = (FLAC__uint64)filestats.st_size;
|
| + return FLAC__STREAM_DECODER_LENGTH_STATUS_OK;
|
| + }
|
| +}
|
| +
|
| +FLAC__bool file_eof_callback_(const FLAC__StreamDecoder *decoder, void *client_data)
|
| +{
|
| + (void)client_data;
|
| +
|
| + return feof(decoder->private_->file)? true : false;
|
| +}
|
|
|
| Property changes on: flac/src/libFLAC/stream_decoder.c
|
| ___________________________________________________________________
|
| Added: svn:eol-style
|
| + LF
|
|
|
|
|
Chromium Code Reviews
Issue 6122009:
Add FLAC to trunk/deps/third_party/.... (Closed)
Base URL: svn://svn.chromium.org/chrome/trunk/deps/third_party/