From 8db36dc847462be9be88d9d9245fa273cf5c8112 Mon Sep 17 00:00:00 2001 From: Dave Chapman Date: Mon, 11 Dec 2006 20:35:22 +0000 Subject: Delete libFLAC - it has't been used since October 2005 git-svn-id: svn://svn.rockbox.org/rockbox/trunk@11716 a1c6a512-1295-4272-9138-f99709370657 --- apps/codecs/libFLAC/stream_decoder.c | 2174 ---------------------------------- 1 file changed, 2174 deletions(-) delete mode 100644 apps/codecs/libFLAC/stream_decoder.c (limited to 'apps/codecs/libFLAC/stream_decoder.c') diff --git a/apps/codecs/libFLAC/stream_decoder.c b/apps/codecs/libFLAC/stream_decoder.c deleted file mode 100644 index 6f6b221527..0000000000 --- a/apps/codecs/libFLAC/stream_decoder.c +++ /dev/null @@ -1,2174 +0,0 @@ -/* libFLAC - Free Lossless Audio Codec library - * Copyright (C) 2000,2001,2002,2003,2004,2005 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. - */ - -#include -#include "global.h" /* for malloc() */ -#include /* for memset/memcpy() */ -#include "FLAC/assert.h" -#include "protected/stream_decoder.h" -#include "private/bitbuffer.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/memory.h" - -#ifdef CPU_COLDFIRE -#include -#endif - -#ifdef HAVE_CONFIG_H -#include -#endif - -#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 - -/*********************************************************************** - * - * Private static data - * - ***********************************************************************/ - -static FLAC__byte ID3V2_TAG_[3] = { 'I', 'D', '3' }; - -/*********************************************************************** - * - * Private class method prototypes - * - ***********************************************************************/ - -static void set_defaults_(FLAC__StreamDecoder *decoder); -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 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); -static FLAC__bool read_zero_padding_(FLAC__StreamDecoder *decoder); -static FLAC__bool read_callback_(FLAC__byte buffer[], unsigned *bytes, void *client_data); - -/*********************************************************************** - * - * Private class data - * - ***********************************************************************/ - -typedef struct FLAC__StreamDecoderPrivate { - FLAC__StreamDecoderReadCallback read_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[]); - void *client_data; - FLAC__BitBuffer *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 last_frame_number; - FLAC__uint32 last_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; - unsigned 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__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_ABORTED", - "FLAC__STREAM_DECODER_UNPARSEABLE_STREAM", - "FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR", - "FLAC__STREAM_DECODER_ALREADY_INITIALIZED", - "FLAC__STREAM_DECODER_INVALID_CALLBACK", - "FLAC__STREAM_DECODER_UNINITIALIZED" -}; - -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__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" -}; - -/*********************************************************************** - * - * Class constructor/destructor - * - ***********************************************************************/ -FLAC__StreamDecoder _sd; -FLAC__StreamDecoderPrivate _sdprivate IDATA_ATTR; -FLAC__StreamDecoderProtected _sdprotected IDATA_ATTR; - -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 = &_sd; - /*decoder = (FLAC__StreamDecoder*)calloc(1, sizeof(FLAC__StreamDecoder)); - if(decoder == 0) { - return 0; - }*/ - - decoder->protected_ = &_sdprotected; - /*decoder->protected_ = (FLAC__StreamDecoderProtected*)calloc(1, sizeof(FLAC__StreamDecoderProtected)); - if(decoder->protected_ == 0) { - free(decoder); - return 0; - }*/ - - decoder->private_ = &_sdprivate; - /*decoder->private_ = (FLAC__StreamDecoderPrivate*)calloc(1, sizeof(FLAC__StreamDecoderPrivate)); - if(decoder->private_ == 0) { - free(decoder->protected_); - free(decoder); - return 0; - }*/ - - decoder->private_->input = FLAC__bitbuffer_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__bitbuffer_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]); - - 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); - - FLAC__stream_decoder_finish(decoder); - - if(0 != decoder->private_->metadata_filter_ids) - free(decoder->private_->metadata_filter_ids); - - FLAC__bitbuffer_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 - * - ***********************************************************************/ - -FLAC_API FLAC__StreamDecoderState FLAC__stream_decoder_init(FLAC__StreamDecoder *decoder) -{ - FLAC__ASSERT(0 != decoder); - - if(decoder->protected_->state != FLAC__STREAM_DECODER_UNINITIALIZED) - return decoder->protected_->state = FLAC__STREAM_DECODER_ALREADY_INITIALIZED; - - if(0 == decoder->private_->read_callback || 0 == decoder->private_->write_callback || 0 == decoder->private_->metadata_callback || 0 == decoder->private_->error_callback) - return decoder->protected_->state = FLAC__STREAM_DECODER_INVALID_CALLBACK; - - if(!FLAC__bitbuffer_init(decoder->private_->input)) - return decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR; - - decoder->private_->last_frame_number = 0; - decoder->private_->last_block_size = 0; - decoder->private_->samples_decoded = 0; - decoder->private_->has_stream_info = false; - decoder->private_->cached = false; - - /* - * get the CPU info and set the function pointers - */ - FLAC__cpu_info(&decoder->private_->cpuinfo); - /* first default to the non-asm routines */ -#if defined(CPU_COLDFIRE) && !defined(SIMULATOR) - decoder->private_->local_lpc_restore_signal = FLAC__lpc_restore_signal_mcf5249; - decoder->private_->local_lpc_restore_signal_16bit = FLAC__lpc_restore_signal_mcf5249; - decoder->private_->local_lpc_restore_signal_16bit_order8 = FLAC__lpc_restore_signal_mcf5249; -#else - decoder->private_->local_lpc_restore_signal = FLAC__lpc_restore_signal; - decoder->private_->local_lpc_restore_signal_16bit = FLAC__lpc_restore_signal; - decoder->private_->local_lpc_restore_signal_16bit_order8 = FLAC__lpc_restore_signal; -#endif - decoder->private_->local_lpc_restore_signal_64bit = FLAC__lpc_restore_signal_wide; - /* 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(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 - - if(!FLAC__stream_decoder_reset(decoder)) - return decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR; - - return decoder->protected_->state; -} - -FLAC_API void FLAC__stream_decoder_finish(FLAC__StreamDecoder *decoder) -{ - unsigned i; - FLAC__ASSERT(0 != decoder); - if(decoder->protected_->state == FLAC__STREAM_DECODER_UNINITIALIZED) - return; - if(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__bitbuffer_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; - - set_defaults_(decoder); - - decoder->protected_->state = FLAC__STREAM_DECODER_UNINITIALIZED; -} - -FLAC_API FLAC__bool FLAC__stream_decoder_set_read_callback(FLAC__StreamDecoder *decoder, FLAC__StreamDecoderReadCallback 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; - decoder->private_->read_callback = value; - return true; -} - -FLAC_API FLAC__bool FLAC__stream_decoder_set_write_callback(FLAC__StreamDecoder *decoder, FLAC__StreamDecoderWriteCallback 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; - decoder->private_->write_callback = value; - return true; -} - -FLAC_API FLAC__bool FLAC__stream_decoder_set_metadata_callback(FLAC__StreamDecoder *decoder, FLAC__StreamDecoderMetadataCallback 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; - decoder->private_->metadata_callback = value; - return true; -} - -FLAC_API FLAC__bool FLAC__stream_decoder_set_error_callback(FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorCallback 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; - decoder->private_->error_callback = value; - return true; -} - -FLAC_API FLAC__bool FLAC__stream_decoder_set_client_data(FLAC__StreamDecoder *decoder, void *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; - decoder->private_->client_data = 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*)realloc(decoder->private_->metadata_filter_ids, decoder->private_->metadata_filter_ids_capacity * 2))) - return decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR; - 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*)realloc(decoder->private_->metadata_filter_ids, decoder->private_->metadata_filter_ids_capacity * 2))) - return decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR; - 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 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_flush(FLAC__StreamDecoder *decoder) -{ - FLAC__ASSERT(0 != decoder); - FLAC__ASSERT(0 != decoder->private_); - FLAC__ASSERT(0 != decoder->protected_); - - if(!FLAC__bitbuffer_clear(decoder->private_->input)) { - decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR; - return false; - } - decoder->private_->last_frame_number = 0; - decoder->private_->last_block_size = 0; - 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)) { - decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR; - return false; - } - decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_METADATA; - - decoder->private_->samples_decoded = 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; - } - } -} - -/*********************************************************************** - * - * Protected class methods - * - ***********************************************************************/ - -unsigned FLAC__stream_decoder_get_input_bytes_unconsumed(const FLAC__StreamDecoder *decoder) -{ - FLAC__ASSERT(0 != decoder); - return FLAC__bitbuffer_get_input_bytes_unconsumed(decoder->private_->input); -} - -/*********************************************************************** - * - * Private class methods - * - ***********************************************************************/ - -void set_defaults_(FLAC__StreamDecoder *decoder) -{ - decoder->private_->read_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; -} - -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*)malloc(sizeof(FLAC__int32)*(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) -{ - unsigned 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__bitbuffer_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__bitbuffer_read_raw_uint32(decoder->private_->input, &x, 8, read_callback_, decoder)) - return false; /* the 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; /* the read_callback_ sets the state for us */ - } - continue; - } - if(x == 0xff) { /* MAGIC NUMBER for the first 8 frame sync bits */ - decoder->private_->header_warmup[0] = (FLAC__byte)x; - if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, 8, read_callback_, decoder)) - return false; /* the 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) { - decoder->private_->error_callback(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC, decoder->private_->client_data); - 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__bitbuffer_is_consumed_byte_aligned(decoder->private_->input)); - - if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_IS_LAST_LEN, read_callback_, decoder)) - return false; /* the read_callback_ sets the state for us */ - is_last = x? true : false; - - if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &type, FLAC__STREAM_METADATA_TYPE_LEN, read_callback_, decoder)) - return false; /* the read_callback_ sets the state for us */ - - if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &length, FLAC__STREAM_METADATA_LENGTH_LEN, read_callback_, decoder)) - return false; /* the 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(decoder->private_->metadata_filter[FLAC__METADATA_TYPE_STREAMINFO]) - 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_->metadata_filter[FLAC__METADATA_TYPE_SEEKTABLE]) - 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__bitbuffer_read_byte_block_aligned_no_crc(decoder->private_->input, block.data.application.id, FLAC__STREAM_METADATA_APPLICATION_ID_LEN/8, read_callback_, decoder)) - return false; /* the read_callback_ sets the state for us */ - - 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__bitbuffer_read_byte_block_aligned_no_crc(decoder->private_->input, 0, real_length, read_callback_, decoder)) - return false; /* the read_callback_ sets the state for us */ - } - else { - switch(type) { - case FLAC__METADATA_TYPE_PADDING: - /* skip the padding bytes */ - if(!FLAC__bitbuffer_read_byte_block_aligned_no_crc(decoder->private_->input, 0, real_length, read_callback_, decoder)) - return false; /* the 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__bitbuffer_read_byte_block_aligned_no_crc(decoder->private_->input, block.data.application.data, real_length, read_callback_, decoder)) - return false; /* the 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_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__bitbuffer_read_byte_block_aligned_no_crc(decoder->private_->input, block.data.unknown.data, real_length, read_callback_, decoder)) - return false; /* the read_callback_ sets the state for us */ - } - else - block.data.unknown.data = 0; - break; - } - 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_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) - 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__bitbuffer_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__bitbuffer_read_raw_uint32(decoder->private_->input, &x, bits, read_callback_, decoder)) - return false; /* the 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__bitbuffer_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_STREAMINFO_MAX_BLOCK_SIZE_LEN, read_callback_, decoder)) - return false; /* the 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__bitbuffer_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_STREAMINFO_MIN_FRAME_SIZE_LEN, read_callback_, decoder)) - return false; /* the 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__bitbuffer_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_STREAMINFO_MAX_FRAME_SIZE_LEN, read_callback_, decoder)) - return false; /* the 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__bitbuffer_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_STREAMINFO_SAMPLE_RATE_LEN, read_callback_, decoder)) - return false; /* the 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__bitbuffer_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_STREAMINFO_CHANNELS_LEN, read_callback_, decoder)) - return false; /* the 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__bitbuffer_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_STREAMINFO_BITS_PER_SAMPLE_LEN, read_callback_, decoder)) - return false; /* the 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__bitbuffer_read_raw_uint64(decoder->private_->input, &decoder->private_->stream_info.data.stream_info.total_samples, FLAC__STREAM_METADATA_STREAMINFO_TOTAL_SAMPLES_LEN, read_callback_, decoder)) - return false; /* the read_callback_ sets the state for us */ - used_bits += bits; - - if(!FLAC__bitbuffer_read_byte_block_aligned_no_crc(decoder->private_->input, decoder->private_->stream_info.data.stream_info.md5sum, 16, read_callback_, decoder)) - return false; /* the 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__bitbuffer_read_byte_block_aligned_no_crc(decoder->private_->input, 0, length, read_callback_, decoder)) - return false; /* the 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__bitbuffer_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*)realloc(decoder->private_->seek_table.data.seek_table.points, decoder->private_->seek_table.data.seek_table.num_points * 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__bitbuffer_read_raw_uint64(decoder->private_->input, &xx, FLAC__STREAM_METADATA_SEEKPOINT_SAMPLE_NUMBER_LEN, read_callback_, decoder)) - return false; /* the read_callback_ sets the state for us */ - decoder->private_->seek_table.data.seek_table.points[i].sample_number = xx; - - if(!FLAC__bitbuffer_read_raw_uint64(decoder->private_->input, &xx, FLAC__STREAM_METADATA_SEEKPOINT_STREAM_OFFSET_LEN, read_callback_, decoder)) - return false; /* the read_callback_ sets the state for us */ - decoder->private_->seek_table.data.seek_table.points[i].stream_offset = xx; - - if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_SEEKPOINT_FRAME_SAMPLES_LEN, read_callback_, decoder)) - return false; /* the 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 an error_callback() here? there's an argument for either way */ - if(!FLAC__bitbuffer_read_byte_block_aligned_no_crc(decoder->private_->input, 0, length, read_callback_, decoder)) - return false; /* the 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__bitbuffer_is_consumed_byte_aligned(decoder->private_->input)); - - /* read vendor string */ - FLAC__ASSERT(FLAC__STREAM_METADATA_VORBIS_COMMENT_ENTRY_LENGTH_LEN == 32); - if(!FLAC__bitbuffer_read_raw_uint32_little_endian(decoder->private_->input, &obj->vendor_string.length, read_callback_, decoder)) - return false; /* the read_callback_ sets the state for us */ - if(obj->vendor_string.length > 0) { - if(0 == (obj->vendor_string.entry = (FLAC__byte*)malloc(obj->vendor_string.length+1))) { - decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR; - return false; - } - if(!FLAC__bitbuffer_read_byte_block_aligned_no_crc(decoder->private_->input, obj->vendor_string.entry, obj->vendor_string.length, read_callback_, decoder)) - return false; /* the 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__bitbuffer_read_raw_uint32_little_endian(decoder->private_->input, &obj->num_comments, read_callback_, decoder)) - return false; /* the read_callback_ sets the state for us */ - - /* read comments */ - if(obj->num_comments > 0) { - if(0 == (obj->comments = (FLAC__StreamMetadata_VorbisComment_Entry*)malloc(obj->num_comments * 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__bitbuffer_read_raw_uint32_little_endian(decoder->private_->input, &obj->comments[i].length, read_callback_, decoder)) - return false; /* the read_callback_ sets the state for us */ - if(obj->comments[i].length > 0) { - if(0 == (obj->comments[i].entry = (FLAC__byte*)malloc(obj->comments[i].length+1))) { - decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR; - return false; - } - if(!FLAC__bitbuffer_read_byte_block_aligned_no_crc(decoder->private_->input, obj->comments[i].entry, obj->comments[i].length, read_callback_, decoder)) - return false; /* the 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__bitbuffer_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__bitbuffer_read_byte_block_aligned_no_crc(decoder->private_->input, (FLAC__byte*)obj->media_catalog_number, FLAC__STREAM_METADATA_CUESHEET_MEDIA_CATALOG_NUMBER_LEN/8, read_callback_, decoder)) - return false; /* the read_callback_ sets the state for us */ - - if(!FLAC__bitbuffer_read_raw_uint64(decoder->private_->input, &obj->lead_in, FLAC__STREAM_METADATA_CUESHEET_LEAD_IN_LEN, read_callback_, decoder)) - return false; /* the read_callback_ sets the state for us */ - - if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_CUESHEET_IS_CD_LEN, read_callback_, decoder)) - return false; /* the read_callback_ sets the state for us */ - obj->is_cd = x? true : false; - - if(!FLAC__bitbuffer_skip_bits_no_crc(decoder->private_->input, FLAC__STREAM_METADATA_CUESHEET_RESERVED_LEN, read_callback_, decoder)) - return false; /* the read_callback_ sets the state for us */ - - if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_CUESHEET_NUM_TRACKS_LEN, read_callback_, decoder)) - return false; /* the read_callback_ sets the state for us */ - obj->num_tracks = x; - - if(obj->num_tracks > 0) { - if(0 == (obj->tracks = (FLAC__StreamMetadata_CueSheet_Track*)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__bitbuffer_read_raw_uint64(decoder->private_->input, &track->offset, FLAC__STREAM_METADATA_CUESHEET_TRACK_OFFSET_LEN, read_callback_, decoder)) - return false; /* the read_callback_ sets the state for us */ - - if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_CUESHEET_TRACK_NUMBER_LEN, read_callback_, decoder)) - return false; /* the 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__bitbuffer_read_byte_block_aligned_no_crc(decoder->private_->input, (FLAC__byte*)track->isrc, FLAC__STREAM_METADATA_CUESHEET_TRACK_ISRC_LEN/8, read_callback_, decoder)) - return false; /* the read_callback_ sets the state for us */ - - if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_CUESHEET_TRACK_TYPE_LEN, read_callback_, decoder)) - return false; /* the read_callback_ sets the state for us */ - track->type = x; - - if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_CUESHEET_TRACK_PRE_EMPHASIS_LEN, read_callback_, decoder)) - return false; /* the read_callback_ sets the state for us */ - track->pre_emphasis = x; - - if(!FLAC__bitbuffer_skip_bits_no_crc(decoder->private_->input, FLAC__STREAM_METADATA_CUESHEET_TRACK_RESERVED_LEN, read_callback_, decoder)) - return false; /* the read_callback_ sets the state for us */ - - if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_CUESHEET_TRACK_NUM_INDICES_LEN, read_callback_, decoder)) - return false; /* the 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*)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__bitbuffer_read_raw_uint64(decoder->private_->input, &index->offset, FLAC__STREAM_METADATA_CUESHEET_INDEX_OFFSET_LEN, read_callback_, decoder)) - return false; /* the read_callback_ sets the state for us */ - - if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_CUESHEET_INDEX_NUMBER_LEN, read_callback_, decoder)) - return false; /* the read_callback_ sets the state for us */ - index->number = (FLAC__byte)x; - - if(!FLAC__bitbuffer_skip_bits_no_crc(decoder->private_->input, FLAC__STREAM_METADATA_CUESHEET_INDEX_RESERVED_LEN, read_callback_, decoder)) - return false; /* the 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__bitbuffer_read_raw_uint32(decoder->private_->input, &x, 24, read_callback_, decoder)) - return false; /* the read_callback_ sets the state for us */ - /* get the size (in bytes) to skip */ - skip = 0; - for(i = 0; i < 4; i++) { - if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, 8, read_callback_, decoder)) - return false; /* the read_callback_ sets the state for us */ - skip <<= 7; - skip |= (x & 0x7f); - } - /* skip the rest of the tag */ - if(!FLAC__bitbuffer_read_byte_block_aligned_no_crc(decoder->private_->input, 0, skip, read_callback_, decoder)) - return false; /* the 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(decoder->private_->has_stream_info && decoder->private_->stream_info.data.stream_info.total_samples) { - if(decoder->private_->samples_decoded >= decoder->private_->stream_info.data.stream_info.total_samples) { - decoder->protected_->state = FLAC__STREAM_DECODER_END_OF_STREAM; - return true; - } - } - - /* make sure we're byte aligned */ - if(!FLAC__bitbuffer_is_consumed_byte_aligned(decoder->private_->input)) { - if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, FLAC__bitbuffer_bits_left_for_byte_alignment(decoder->private_->input), read_callback_, decoder)) - return false; /* the 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__bitbuffer_read_raw_uint32(decoder->private_->input, &x, 8, read_callback_, decoder)) - return false; /* the 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__bitbuffer_read_raw_uint32(decoder->private_->input, &x, 8, read_callback_, decoder)) - return false; /* the 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) { - decoder->private_->error_callback(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC, decoder->private_->client_data); - 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, left, right; - FLAC__uint16 frame_crc; /* the one we calculate from the input stream */ - FLAC__uint32 x; - - *got_a_frame = false; - - /* init the CRC */ - frame_crc = 0; - FLAC__CRC16_UPDATE(decoder->private_->header_warmup[0], frame_crc); - FLAC__CRC16_UPDATE(decoder->private_->header_warmup[1], frame_crc); - FLAC__bitbuffer_reset_read_crc16(decoder->private_->input, frame_crc); - - if(!read_frame_header_(decoder)) - return false; - if(decoder->protected_->state == FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC) - 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_READ_FRAME) { - decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC; - return true; - } - } - if(!read_zero_padding_(decoder)) - return false; - - /* - * Read the frame CRC-16 from the footer and check - */ - frame_crc = FLAC__bitbuffer_get_read_crc16(decoder->private_->input); - if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, FLAC__FRAME_FOOTER_CRC_LEN, read_callback_, decoder)) - return false; /* the read_callback_ sets the state for us */ - if(frame_crc == (FLAC__uint16)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++) { - mid = decoder->private_->output[0][i]; - side = decoder->private_->output[1][i]; - mid <<= 1; - if(side & 1) /* i.e. if 'side' is odd... */ - mid++; - left = mid + side; - right = mid - side; - decoder->private_->output[0][i] = left >> 1; - decoder->private_->output[1][i] = right >> 1; - } - break; - default: - FLAC__ASSERT(0); - break; - } - } - } - else { - /* Bad frame, emit error and zero the output signal */ - decoder->private_->error_callback(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_FRAME_CRC_MISMATCH, decoder->private_->client_data); - 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; - - /* 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(decoder->private_->write_callback(decoder, &decoder->private_->frame, (const FLAC__int32 * const *)decoder->private_->output, decoder->private_->client_data) != 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; - const FLAC__bool is_known_variable_blocksize_stream = (decoder->private_->has_stream_info && decoder->private_->stream_info.data.stream_info.min_blocksize != decoder->private_->stream_info.data.stream_info.max_blocksize); - const FLAC__bool is_known_fixed_blocksize_stream = (decoder->private_->has_stream_info && decoder->private_->stream_info.data.stream_info.min_blocksize == decoder->private_->stream_info.data.stream_info.max_blocksize); - - FLAC__ASSERT(FLAC__bitbuffer_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 the reserved bits are 0 - */ - if(raw_header[1] & 0x03) { /* 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. - */ - - /* - * 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__bitbuffer_read_raw_uint32(decoder->private_->input, &x, 8, read_callback_, decoder)) - return false; /* the 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; - decoder->private_->error_callback(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_BAD_HEADER, decoder->private_->client_data); - 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: - if(is_known_fixed_blocksize_stream) - decoder->private_->frame.header.blocksize = decoder->private_->stream_info.data.stream_info.min_blocksize; - else - 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: - case 2: - case 3: - is_unparseable = true; - 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: - decoder->private_->error_callback(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_BAD_HEADER, decoder->private_->client_data); - 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; - } - - if(raw_header[3] & 0x01) { /* this should be a zero padding bit */ - decoder->private_->error_callback(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_BAD_HEADER, decoder->private_->client_data); - decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC; - return true; - } - - /* - * Now we get to the regrettable consequences of not knowing for sure - * whether we got a frame number or a sample number. There are no - * encoders that do variable-blocksize encoding so unless we know from - * the STREAMINFO that it is variable-blocksize we will assume it is - * fixed-blocksize. The trouble comes when we have no STREAMINFO; again - * we will guess that is fixed-blocksize. Where this can go wrong: 1) a - * variable-blocksize stream with no STREAMINFO; 2) a fixed-blocksize - * stream that was edited such that one or more frames before or - * including this one do not have the same number of samples as the - * STREAMINFO's min and max blocksize. - */ - if(is_known_variable_blocksize_stream) { - if(blocksize_hint) { - if(!FLAC__bitbuffer_read_utf8_uint64(decoder->private_->input, &xx, read_callback_, decoder, raw_header, &raw_header_len)) - return false; /* the 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; - decoder->private_->error_callback(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_BAD_HEADER, decoder->private_->client_data); - 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 - is_unparseable = true; - } - else { - if(!FLAC__bitbuffer_read_utf8_uint32(decoder->private_->input, &x, read_callback_, decoder, raw_header, &raw_header_len)) - return false; /* the 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; - decoder->private_->error_callback(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_BAD_HEADER, decoder->private_->client_data); - decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC; - return true; - } - decoder->private_->last_frame_number = x; - decoder->private_->frame.header.number_type = FLAC__FRAME_NUMBER_TYPE_SAMPLE_NUMBER; - if(decoder->private_->has_stream_info) { - FLAC__ASSERT(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_->last_block_size = decoder->private_->frame.header.blocksize; - } - else if(blocksize_hint) { - if(decoder->private_->last_block_size) - decoder->private_->frame.header.number.sample_number = (FLAC__uint64)decoder->private_->last_block_size * (FLAC__uint64)x; - else - is_unparseable = true; - } - else { - decoder->private_->frame.header.number.sample_number = (FLAC__uint64)decoder->private_->frame.header.blocksize * (FLAC__uint64)x; - decoder->private_->last_block_size = decoder->private_->frame.header.blocksize; - } - } - - if(blocksize_hint) { - if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, 8, read_callback_, decoder)) - return false; /* the read_callback_ sets the state for us */ - raw_header[raw_header_len++] = (FLAC__byte)x; - if(blocksize_hint == 7) { - FLAC__uint32 _x; - if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &_x, 8, read_callback_, decoder)) - return false; /* the 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__bitbuffer_read_raw_uint32(decoder->private_->input, &x, 8, read_callback_, decoder)) - return false; /* the 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__bitbuffer_read_raw_uint32(decoder->private_->input, &_x, 8, read_callback_, decoder)) - return false; /* the 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__bitbuffer_read_raw_uint32(decoder->private_->input, &x, 8, read_callback_, decoder)) - return false; /* the read_callback_ sets the state for us */ - crc8 = (FLAC__byte)x; - - if(FLAC__crc8(raw_header, raw_header_len) != crc8) { - decoder->private_->error_callback(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_BAD_HEADER, decoder->private_->client_data); - decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC; - return true; - } - - if(is_unparseable) { - decoder->protected_->state = FLAC__STREAM_DECODER_UNPARSEABLE_STREAM; - return false; - } - - 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; - - if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, 8, read_callback_, decoder)) /* MAGIC NUMBER */ - return false; /* the read_callback_ sets the state for us */ - - wasted_bits = (x & 1); - x &= 0xfe; - - if(wasted_bits) { - FLAC__uint32 u; - if(!FLAC__bitbuffer_read_unary_unsigned(decoder->private_->input, &u, read_callback_, decoder)) - return false; /* the 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) { - decoder->private_->error_callback(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC, decoder->private_->client_data); - 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) { - decoder->protected_->state = FLAC__STREAM_DECODER_UNPARSEABLE_STREAM; - return false; - } - else if(x <= 24) { - if(!read_subframe_fixed_(decoder, channel, bps, (x>>1)&7, do_full_decode)) - return false; - } - else if(x < 64) { - decoder->protected_->state = FLAC__STREAM_DECODER_UNPARSEABLE_STREAM; - return false; - } - else { - if(!read_subframe_lpc_(decoder, channel, bps, ((x>>1)&31)+1, do_full_decode)) - return false; - } - - if(wasted_bits && do_full_decode) { - unsigned i; - 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__bitbuffer_read_raw_int32(decoder->private_->input, &x, bps, read_callback_, decoder)) - return false; /* the 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__bitbuffer_read_raw_int32(decoder->private_->input, &i32, bps, read_callback_, decoder)) - return false; /* the read_callback_ sets the state for us */ - subframe->warmup[u] = i32; - } - - /* read entropy coding method info */ - if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &u32, FLAC__ENTROPY_CODING_METHOD_TYPE_LEN, read_callback_, decoder)) - return false; /* the 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: - if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &u32, FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ORDER_LEN, read_callback_, decoder)) - return false; /* the 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: - decoder->protected_->state = FLAC__STREAM_DECODER_UNPARSEABLE_STREAM; - return false; - } - - /* read residual */ - switch(subframe->entropy_coding_method.type) { - case FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE: - 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])) - 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__bitbuffer_read_raw_int32(decoder->private_->input, &i32, bps, read_callback_, decoder)) - return false; /* the read_callback_ sets the state for us */ - subframe->warmup[u] = i32; - } - - /* read qlp coeff precision */ - if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &u32, FLAC__SUBFRAME_LPC_QLP_COEFF_PRECISION_LEN, read_callback_, decoder)) - return false; /* the read_callback_ sets the state for us */ - if(u32 == (1u << FLAC__SUBFRAME_LPC_QLP_COEFF_PRECISION_LEN) - 1) { - decoder->private_->error_callback(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC, decoder->private_->client_data); - decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC; - return true; - } - subframe->qlp_coeff_precision = u32+1; - - /* read qlp shift */ - if(!FLAC__bitbuffer_read_raw_int32(decoder->private_->input, &i32, FLAC__SUBFRAME_LPC_QLP_SHIFT_LEN, read_callback_, decoder)) - return false; /* the read_callback_ sets the state for us */ - subframe->quantization_level = i32; - - /* read quantized lp coefficiencts */ - for(u = 0; u < order; u++) { - if(!FLAC__bitbuffer_read_raw_int32(decoder->private_->input, &i32, subframe->qlp_coeff_precision, read_callback_, decoder)) - return false; /* the read_callback_ sets the state for us */ - subframe->qlp_coeff[u] = i32; - } - - /* read entropy coding method info */ - if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &u32, FLAC__ENTROPY_CODING_METHOD_TYPE_LEN, read_callback_, decoder)) - return false; /* the 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: - if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &u32, FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ORDER_LEN, read_callback_, decoder)) - return false; /* the 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: - decoder->protected_->state = FLAC__STREAM_DECODER_UNPARSEABLE_STREAM; - return false; - } - - /* read residual */ - switch(subframe->entropy_coding_method.type) { - case FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE: - 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])) - 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); - 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__bitbuffer_read_raw_int32(decoder->private_->input, &x, bps, read_callback_, decoder)) - return false; /* the 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__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; - - /* sanity checks */ - if(partition_order == 0) { - if(decoder->private_->frame.header.blocksize < predictor_order) { - decoder->private_->error_callback(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC, decoder->private_->client_data); - decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC; - return true; - } - } - else { - if(partition_samples < predictor_order) { - decoder->private_->error_callback(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC, decoder->private_->client_data); - 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__bitbuffer_read_raw_uint32(decoder->private_->input, &rice_parameter, FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_PARAMETER_LEN, read_callback_, decoder)) - return false; /* the read_callback_ sets the state for us */ - partitioned_rice_contents->parameters[partition] = rice_parameter; - if(rice_parameter < FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER) { -#ifdef FLAC__SYMMETRIC_RICE - for(u = (partition_order == 0 || partition > 0)? 0 : predictor_order; u < partition_samples; u++, sample++) { - if(!FLAC__bitbuffer_read_symmetric_rice_signed(decoder->private_->input, &i, rice_parameter, read_callback_, decoder)) - return false; /* the read_callback_ sets the state for us */ - residual[sample] = i; - } -#else - u = (partition_order == 0 || partition > 0)? partition_samples : partition_samples - predictor_order; - if(!FLAC__bitbuffer_read_rice_signed_block(decoder->private_->input, residual + sample, u, rice_parameter, read_callback_, decoder)) - return false; /* the read_callback_ sets the state for us */ - sample += u; -#endif - } - else { - if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &rice_parameter, FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_RAW_LEN, read_callback_, decoder)) - return false; /* the 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__bitbuffer_read_raw_int32(decoder->private_->input, (FLAC__uint32 *)&i, rice_parameter, read_callback_, decoder)) - return false; /* the read_callback_ sets the state for us */ - residual[sample] = i; - } - } - } - - return true; -} - -FLAC__bool read_zero_padding_(FLAC__StreamDecoder *decoder) -{ - if(!FLAC__bitbuffer_is_consumed_byte_aligned(decoder->private_->input)) { - FLAC__uint32 zero = 0; - if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &zero, FLAC__bitbuffer_bits_left_for_byte_alignment(decoder->private_->input), read_callback_, decoder)) - return false; /* the read_callback_ sets the state for us */ - if(zero != 0) { - decoder->private_->error_callback(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC, decoder->private_->client_data); - decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC; - } - } - return true; -} - -FLAC__bool read_callback_(FLAC__byte buffer[], unsigned *bytes, void *client_data) -{ - FLAC__StreamDecoder *decoder = (FLAC__StreamDecoder *)client_data; - FLAC__StreamDecoderReadStatus status; - - status = decoder->private_->read_callback(decoder, buffer, bytes, decoder->private_->client_data); - if(status == FLAC__STREAM_DECODER_READ_STATUS_END_OF_STREAM) - decoder->protected_->state = FLAC__STREAM_DECODER_END_OF_STREAM; - else if(status == FLAC__STREAM_DECODER_READ_STATUS_ABORT) - decoder->protected_->state = FLAC__STREAM_DECODER_ABORTED; - return status == FLAC__STREAM_DECODER_READ_STATUS_CONTINUE; -} -- cgit v1.2.3