| /* libFLAC - Free Lossless Audio Codec library |
| * Copyright (C) 2000,2001,2002,2003,2004,2005,2006 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 __MINGW32__ |
| #if _MSC_VER <= 1200 /* @@@ [2G limit] */ |
| #define fseeko fseek |
| #define ftello ftell |
| #endif |
| #endif |
| #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/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_(); |
| 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); |
| 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[]); |
| void *client_data; |
| FILE *file; /* only used if FLAC__stream_decoder_init_file()/FLAC__stream_decoder_init_file() called, else NULL */ |
| 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__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; |
| struct 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() |
| { |
| 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__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]); |
| |
| 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__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 |
| * |
| ***********************************************************************/ |
| |
| 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; |
| /* 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 |
| |
| /* from here on, errors are fatal */ |
| |
| if(!FLAC__bitbuffer_init(decoder->private_->input)) { |
| 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_->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; |
| |
| 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__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; |
| |
| #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*)realloc(decoder->private_->metadata_filter_ids, decoder->private_->metadata_filter_ids_capacity * 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*)realloc(decoder->private_->metadata_filter_ids, decoder->private_->metadata_filter_ids_capacity * 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; |
| 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__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)) { |
| /* 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; |
| |
| /* 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); |
| return FLAC__bitbuffer_get_input_bytes_unconsumed(decoder->private_->input); |
| } |
| |
| /*********************************************************************** |
| * |
| * 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_() |
| { |
| /* 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__ || defined __EMX__ |
| /* almost certainly not needed for any modern Cygwin, but let's be safe... */ |
| 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*)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; /* 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__bitbuffer_read_raw_uint32(decoder->private_->input, &x, 8, read_callback_, decoder)) |
| 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__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; /* 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; /* 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; /* 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__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; /* 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; /* 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; /* 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; /* 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__bitbuffer_read_byte_block_aligned_no_crc(decoder->private_->input, block.data.unknown.data, real_length, read_callback_, decoder)) |
| 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__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; /* 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; /* 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; /* 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; /* 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; /* 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; /* 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; /* 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; /* 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; /* 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; /* 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; /* 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; /* 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; /* 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__bitbuffer_read_byte_block_aligned_no_crc(decoder->private_->input, 0, length, read_callback_, decoder)) |
| 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__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; /* 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; /* 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; /* 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; /* 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; /* 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; /* 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; /* 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; /* 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; /* 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; /* 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; /* 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; /* 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; /* 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; /* 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; /* 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; /* 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; /* 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; /* 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; /* 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; /* read_callback_ sets the state for us */ |
| } |
| } |
| } |
| } |
| |
| return true; |
| } |
| |
| FLAC__bool read_metadata_picture_(FLAC__StreamDecoder *decoder, FLAC__StreamMetadata_Picture *obj) |
| { |
| FLAC__uint32 len; |
| |
| FLAC__ASSERT(FLAC__bitbuffer_is_consumed_byte_aligned(decoder->private_->input)); |
| |
| /* read type */ |
| if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &obj->type, FLAC__STREAM_METADATA_PICTURE_TYPE_LEN, read_callback_, decoder)) |
| return false; /* read_callback_ sets the state for us */ |
| |
| /* read MIME type */ |
| if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &len, FLAC__STREAM_METADATA_PICTURE_MIME_TYPE_LENGTH_LEN, read_callback_, decoder)) |
| return false; /* read_callback_ sets the state for us */ |
| if(0 == (obj->mime_type = (char*)malloc(len+1))) { |
| decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR; |
| return false; |
| } |
| if(len > 0) { |
| if(!FLAC__bitbuffer_read_byte_block_aligned_no_crc(decoder->private_->input, (FLAC__byte*)obj->mime_type, len, read_callback_, decoder)) |
| return false; /* read_callback_ sets the state for us */ |
| } |
| obj->mime_type[len] = '\0'; |
| |
| /* read description */ |
| if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &len, FLAC__STREAM_METADATA_PICTURE_DESCRIPTION_LENGTH_LEN, read_callback_, decoder)) |
| return false; /* read_callback_ sets the state for us */ |
| if(0 == (obj->description = (FLAC__byte*)malloc(len+1))) { |
| decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR; |
| return false; |
| } |
| if(len > 0) { |
| if(!FLAC__bitbuffer_read_byte_block_aligned_no_crc(decoder->private_->input, obj->description, len, read_callback_, decoder)) |
| return false; /* read_callback_ sets the state for us */ |
| } |
| obj->description[len] = '\0'; |
| |
| /* read width */ |
| if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &obj->width, FLAC__STREAM_METADATA_PICTURE_WIDTH_LEN, read_callback_, decoder)) |
| return false; /* read_callback_ sets the state for us */ |
| |
| /* read height */ |
| if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &obj->height, FLAC__STREAM_METADATA_PICTURE_HEIGHT_LEN, read_callback_, decoder)) |
| return false; /* read_callback_ sets the state for us */ |
| |
| /* read depth */ |
| if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &obj->depth, FLAC__STREAM_METADATA_PICTURE_DEPTH_LEN, read_callback_, decoder)) |
| return false; /* read_callback_ sets the state for us */ |
| |
| /* read colors */ |
| if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &obj->colors, FLAC__STREAM_METADATA_PICTURE_COLORS_LEN, read_callback_, decoder)) |
| return false; /* read_callback_ sets the state for us */ |
| |
| /* read data */ |
| if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &(obj->data_length), FLAC__STREAM_METADATA_PICTURE_DATA_LENGTH_LEN, read_callback_, decoder)) |
| return false; /* read_callback_ sets the state for us */ |
| if(0 == (obj->data = (FLAC__byte*)malloc(obj->data_length))) { |
| decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR; |
| return false; |
| } |
| if(obj->data_length > 0) { |
| if(!FLAC__bitbuffer_read_byte_block_aligned_no_crc(decoder->private_->input, obj->data, obj->data_length, read_callback_, decoder)) |
| 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__bitbuffer_read_raw_uint32(decoder->private_->input, &x, 24, read_callback_, decoder)) |
| 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__bitbuffer_read_raw_uint32(decoder->private_->input, &x, 8, read_callback_, decoder)) |
| return false; /* 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; /* 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__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; /* 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; /* 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; /* 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, 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) /* 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; |
| |
| /* |
| * 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; /* 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 */ |
| 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; |
| |
| /* 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; |
| 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; /* 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: |
| 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: |
| 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; |
| } |
| |
| if(raw_header[3] & 0x01) { /* this should be a zero padding bit */ |
| send_error_to_client_(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_BAD_HEADER); |
| 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; /* 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 |
| is_unparseable = true; |
| } |
| else { |
| if(!FLAC__bitbuffer_read_utf8_uint32(decoder->private_->input, &x, read_callback_, decoder, 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_->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; /* 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; /* 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; /* 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; /* 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; /* 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; |
| } |
| |
| 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__bitbuffer_read_raw_uint32(decoder->private_->input, &x, 8, read_callback_, decoder)) /* MAGIC NUMBER */ |
| return false; /* read_callback_ sets the state for us */ |
| |
| wasted_bits = (x & 1); |
| x &= 0xfe; |
| |
| if(wasted_bits) { |
| unsigned u; |
| if(!FLAC__bitbuffer_read_unary_unsigned(decoder->private_->input, &u, read_callback_, decoder)) |
| 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__bitbuffer_read_raw_int32(decoder->private_->input, &x, bps, read_callback_, decoder)) |
| 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__bitbuffer_read_raw_int32(decoder->private_->input, &i32, bps, read_callback_, decoder)) |
| return false; /* 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; /* 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; /* 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: |
| 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; /* 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; /* 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__bitbuffer_read_raw_int32(decoder->private_->input, &i32, FLAC__SUBFRAME_LPC_QLP_SHIFT_LEN, read_callback_, decoder)) |
| 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__bitbuffer_read_raw_int32(decoder->private_->input, &i32, subframe->qlp_coeff_precision, read_callback_, decoder)) |
| return false; /* 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; /* 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; /* 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: |
| 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; /* 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) { |
| 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__bitbuffer_read_raw_uint32(decoder->private_->input, &rice_parameter, FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_PARAMETER_LEN, read_callback_, decoder)) |
| return false; /* 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) { |
| 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; /* read_callback_ sets the state for us */ |
| sample += u; |
| } |
| 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; /* 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, &i, rice_parameter, read_callback_, decoder)) |
| return false; /* 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; /* 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 = 4608 * 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; |
| if(upper_bound_sample == 0) |
| upper_bound_sample = 1; |
| |
| /* |
| * Now we refine the bounds if we have a seektable with |
| * suitable points. Note that according to the spec they |
| * must be ordered by ascending sample number. |
| */ |
| if(seek_table) { |
| /* 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].sample_number <= target_sample) |
| break; |
| } |
| if(i >= 0) { /* i.e. we found a suitable seek point... */ |
| lower_bound = first_frame_offset + seek_table->points[i].stream_offset; |
| 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].sample_number > target_sample) |
| break; |
| } |
| if(i < (int)seek_table->num_points) { /* i.e. we found a suitable seek point... */ |
| upper_bound = first_frame_offset + seek_table->points[i].stream_offset; |
| upper_bound_sample = seek_table->points[i].sample_number; |
| } |
| } |
| |
| 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; |
| } |
| this_frame_sample = decoder->private_->last_frame.header.number.sample_number; |
| |
| if (!decoder->private_->samples_decoded || (this_frame_sample + decoder->private_->last_frame.header.blocksize >= upper_bound_sample && !first_seek)) { |
| if (pos == (FLAC__int64)lower_bound) { |
| decoder->protected_->state = FLAC__STREAM_DECODER_SEEK_ERROR; |
| return false; |
| } |
| /* our last move backwards wasn't big enough, try again */ |
| approx_bytes_per_frame *= 2; |
| continue; |
| } |
| /* allow one seek over upper bound, required 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; |
| } |
| |
| FLAC__ASSERT(decoder->private_->last_frame.header.number_type == FLAC__FRAME_NUMBER_TYPE_SAMPLE_NUMBER); |
| |
| /* we need to narrow the search */ |
| if(target_sample < this_frame_sample) { |
| upper_bound_sample = this_frame_sample + decoder->private_->last_frame.header.blocksize; |
| 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 = 0; /* only initialized to avoid compiler warning */ |
| 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. @@@@@@DELETE:this would also mostly (or totally if we could |
| * be sure to land before the last frame) avoid the |
| * end-of-stream case we have to check later. |
| */ |
| } |
| |
| /* 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/*@@@@@@ && decoder->protected_->state != FLAC__STREAM_DECODER_END_OF_STREAM*/) { |
| 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; |
| } |