1 /* libFLAC - Free Lossless Audio Codec library
2 * Copyright (C) 2000,2001,2002,2003,2004,2005,2006,2007 Josh Coalson
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
8 * - Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
11 * - Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * - Neither the name of the Xiph.org Foundation nor the names of its
16 * contributors may be used to endorse or promote products derived from
17 * this software without specific prior written permission.
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR
23 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
24 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
25 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
26 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
27 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
28 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
29 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 #if defined _MSC_VER || defined __MINGW32__
37 #include <io.h> /* for _setmode() */
38 #include <fcntl.h> /* for _O_BINARY */
40 #if defined __CYGWIN__ || defined __EMX__
41 #include <io.h> /* for setmode(), O_BINARY */
42 #include <fcntl.h> /* for _O_BINARY */
45 #include <stdlib.h> /* for malloc() */
46 #include <string.h> /* for memset/memcpy() */
47 #include <sys/stat.h> /* for stat() */
48 #include <sys/types.h> /* for off_t */
49 #if defined _MSC_VER || defined __BORLANDC__ || defined __MINGW32__
50 #if _MSC_VER <= 1600 || defined __BORLANDC__ /* @@@ [2G limit] */
55 #include "FLAC/assert.h"
56 #include "protected/stream_decoder.h"
57 #include "private/bitreader.h"
58 #include "private/bitmath.h"
59 #include "private/cpu.h"
60 #include "private/crc.h"
61 #include "private/fixed.h"
62 #include "private/format.h"
63 #include "private/lpc.h"
64 #include "private/md5.h"
65 #include "private/memory.h"
70 #define max(a,b) ((a)>(b)?(a):(b))
72 /* adjust for compilers that can't understand using LLU suffix for uint64_t literals */
74 #define FLAC__U64L(x) x
76 #define FLAC__U64L(x) x##LLU
80 /* technically this should be in an "export.c" but this is convenient enough */
81 FLAC_API int FLAC_API_SUPPORTS_OGG_FLAC =
90 /***********************************************************************
94 ***********************************************************************/
96 static FLAC__byte ID3V2_TAG_[3] = { 'I', 'D', '3' };
98 /***********************************************************************
100 * Private class method prototypes
102 ***********************************************************************/
104 static void set_defaults_(FLAC__StreamDecoder *decoder);
105 static FILE *get_binary_stdin_(void);
106 static FLAC__bool allocate_output_(FLAC__StreamDecoder *decoder, unsigned size, unsigned channels);
107 static FLAC__bool has_id_filtered_(FLAC__StreamDecoder *decoder, FLAC__byte *id);
108 static FLAC__bool find_metadata_(FLAC__StreamDecoder *decoder);
109 static FLAC__bool read_metadata_(FLAC__StreamDecoder *decoder);
110 static FLAC__bool read_metadata_streaminfo_(FLAC__StreamDecoder *decoder, FLAC__bool is_last, unsigned length);
111 static FLAC__bool read_metadata_seektable_(FLAC__StreamDecoder *decoder, FLAC__bool is_last, unsigned length);
112 static FLAC__bool read_metadata_vorbiscomment_(FLAC__StreamDecoder *decoder, FLAC__StreamMetadata_VorbisComment *obj);
113 static FLAC__bool read_metadata_cuesheet_(FLAC__StreamDecoder *decoder, FLAC__StreamMetadata_CueSheet *obj);
114 static FLAC__bool read_metadata_picture_(FLAC__StreamDecoder *decoder, FLAC__StreamMetadata_Picture *obj);
115 static FLAC__bool skip_id3v2_tag_(FLAC__StreamDecoder *decoder);
116 static FLAC__bool frame_sync_(FLAC__StreamDecoder *decoder);
117 static FLAC__bool read_frame_(FLAC__StreamDecoder *decoder, FLAC__bool *got_a_frame, FLAC__bool do_full_decode);
118 static FLAC__bool read_frame_header_(FLAC__StreamDecoder *decoder);
119 static FLAC__bool read_subframe_(FLAC__StreamDecoder *decoder, unsigned channel, unsigned bps, FLAC__bool do_full_decode);
120 static FLAC__bool read_subframe_constant_(FLAC__StreamDecoder *decoder, unsigned channel, unsigned bps, FLAC__bool do_full_decode);
121 static FLAC__bool read_subframe_fixed_(FLAC__StreamDecoder *decoder, unsigned channel, unsigned bps, const unsigned order, FLAC__bool do_full_decode);
122 static FLAC__bool read_subframe_lpc_(FLAC__StreamDecoder *decoder, unsigned channel, unsigned bps, const unsigned order, FLAC__bool do_full_decode);
123 static FLAC__bool read_subframe_verbatim_(FLAC__StreamDecoder *decoder, unsigned channel, unsigned bps, FLAC__bool do_full_decode);
124 static FLAC__bool read_residual_partitioned_rice_(FLAC__StreamDecoder *decoder, unsigned predictor_order, unsigned partition_order, FLAC__EntropyCodingMethod_PartitionedRiceContents *partitioned_rice_contents, FLAC__int32 *residual, FLAC__bool is_extended);
125 static FLAC__bool read_zero_padding_(FLAC__StreamDecoder *decoder);
126 static FLAC__bool read_callback_(FLAC__byte buffer[], size_t *bytes, void *client_data);
128 static FLAC__StreamDecoderReadStatus read_callback_ogg_aspect_(const FLAC__StreamDecoder *decoder, FLAC__byte buffer[], size_t *bytes);
129 static FLAC__OggDecoderAspectReadStatus read_callback_proxy_(const void *void_decoder, FLAC__byte buffer[], size_t *bytes, void *client_data);
131 static FLAC__StreamDecoderWriteStatus write_audio_frame_to_client_(FLAC__StreamDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 * const buffer[]);
132 static void send_error_to_client_(const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status);
133 static FLAC__bool seek_to_absolute_sample_(FLAC__StreamDecoder *decoder, FLAC__uint64 stream_length, FLAC__uint64 target_sample);
135 static FLAC__bool seek_to_absolute_sample_ogg_(FLAC__StreamDecoder *decoder, FLAC__uint64 stream_length, FLAC__uint64 target_sample);
137 static FLAC__StreamDecoderReadStatus file_read_callback_(const FLAC__StreamDecoder *decoder, FLAC__byte buffer[], size_t *bytes, void *client_data);
138 static FLAC__StreamDecoderSeekStatus file_seek_callback_(const FLAC__StreamDecoder *decoder, FLAC__uint64 absolute_byte_offset, void *client_data);
139 static FLAC__StreamDecoderTellStatus file_tell_callback_(const FLAC__StreamDecoder *decoder, FLAC__uint64 *absolute_byte_offset, void *client_data);
140 static FLAC__StreamDecoderLengthStatus file_length_callback_(const FLAC__StreamDecoder *decoder, FLAC__uint64 *stream_length, void *client_data);
141 static FLAC__bool file_eof_callback_(const FLAC__StreamDecoder *decoder, void *client_data);
143 /***********************************************************************
147 ***********************************************************************/
149 typedef struct FLAC__StreamDecoderPrivate {
153 FLAC__StreamDecoderReadCallback read_callback;
154 FLAC__StreamDecoderSeekCallback seek_callback;
155 FLAC__StreamDecoderTellCallback tell_callback;
156 FLAC__StreamDecoderLengthCallback length_callback;
157 FLAC__StreamDecoderEofCallback eof_callback;
158 FLAC__StreamDecoderWriteCallback write_callback;
159 FLAC__StreamDecoderMetadataCallback metadata_callback;
160 FLAC__StreamDecoderErrorCallback error_callback;
161 /* generic 32-bit datapath: */
162 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[]);
163 /* generic 64-bit datapath: */
164 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[]);
165 /* for use when the signal is <= 16 bits-per-sample, or <= 15 bits-per-sample on a side channel (which requires 1 extra bit): */
166 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[]);
167 /* 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: */
168 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[]);
169 FLAC__bool (*local_bitreader_read_rice_signed_block)(FLAC__BitReader *br, int vals[], unsigned nvals, unsigned parameter);
171 FILE *file; /* only used if FLAC__stream_decoder_init_file()/FLAC__stream_decoder_init_file() called, else NULL */
172 FLAC__BitReader *input;
173 FLAC__int32 *output[FLAC__MAX_CHANNELS];
174 FLAC__int32 *residual[FLAC__MAX_CHANNELS]; /* WATCHOUT: these are the aligned pointers; the real pointers that should be free()'d are residual_unaligned[] below */
175 FLAC__EntropyCodingMethod_PartitionedRiceContents partitioned_rice_contents[FLAC__MAX_CHANNELS];
176 unsigned output_capacity, output_channels;
177 FLAC__uint32 fixed_block_size, next_fixed_block_size;
178 FLAC__uint64 samples_decoded;
179 FLAC__bool has_stream_info, has_seek_table;
180 FLAC__StreamMetadata stream_info;
181 FLAC__StreamMetadata seek_table;
182 FLAC__bool metadata_filter[128]; /* MAGIC number 128 == total number of metadata block types == 1 << 7 */
183 FLAC__byte *metadata_filter_ids;
184 unsigned metadata_filter_ids_count, metadata_filter_ids_capacity; /* units for both are IDs, not bytes */
186 FLAC__bool cached; /* true if there is a byte in lookahead */
187 FLAC__CPUInfo cpuinfo;
188 FLAC__byte header_warmup[2]; /* contains the sync code and reserved bits */
189 FLAC__byte lookahead; /* temp storage when we need to look ahead one byte in the stream */
190 /* unaligned (original) pointers to allocated data */
191 FLAC__int32 *residual_unaligned[FLAC__MAX_CHANNELS];
192 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 */
193 FLAC__bool internal_reset_hack; /* used only during init() so we can call reset to set up the decoder without rewinding the input */
194 FLAC__bool is_seeking;
195 FLAC__MD5Context md5context;
196 FLAC__byte computed_md5sum[16]; /* this is the sum we computed from the decoded data */
197 /* (the rest of these are only used for seeking) */
198 FLAC__Frame last_frame; /* holds the info of the last frame we seeked to */
199 FLAC__uint64 first_frame_offset; /* hint to the seek routine of where in the stream the first audio frame starts */
200 FLAC__uint64 target_sample;
201 unsigned unparseable_frame_count; /* used to tell whether we're decoding a future version of FLAC or just got a bad sync */
203 FLAC__bool got_a_frame; /* hack needed in Ogg FLAC seek routine to check when process_single() actually writes a frame */
205 } FLAC__StreamDecoderPrivate;
207 /***********************************************************************
209 * Public static class data
211 ***********************************************************************/
213 FLAC_API const char * const FLAC__StreamDecoderStateString[] = {
214 "FLAC__STREAM_DECODER_SEARCH_FOR_METADATA",
215 "FLAC__STREAM_DECODER_READ_METADATA",
216 "FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC",
217 "FLAC__STREAM_DECODER_READ_FRAME",
218 "FLAC__STREAM_DECODER_END_OF_STREAM",
219 "FLAC__STREAM_DECODER_OGG_ERROR",
220 "FLAC__STREAM_DECODER_SEEK_ERROR",
221 "FLAC__STREAM_DECODER_ABORTED",
222 "FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR",
223 "FLAC__STREAM_DECODER_UNINITIALIZED"
226 FLAC_API const char * const FLAC__StreamDecoderInitStatusString[] = {
227 "FLAC__STREAM_DECODER_INIT_STATUS_OK",
228 "FLAC__STREAM_DECODER_INIT_STATUS_UNSUPPORTED_CONTAINER",
229 "FLAC__STREAM_DECODER_INIT_STATUS_INVALID_CALLBACKS",
230 "FLAC__STREAM_DECODER_INIT_STATUS_MEMORY_ALLOCATION_ERROR",
231 "FLAC__STREAM_DECODER_INIT_STATUS_ERROR_OPENING_FILE",
232 "FLAC__STREAM_DECODER_INIT_STATUS_ALREADY_INITIALIZED"
235 FLAC_API const char * const FLAC__StreamDecoderReadStatusString[] = {
236 "FLAC__STREAM_DECODER_READ_STATUS_CONTINUE",
237 "FLAC__STREAM_DECODER_READ_STATUS_END_OF_STREAM",
238 "FLAC__STREAM_DECODER_READ_STATUS_ABORT"
241 FLAC_API const char * const FLAC__StreamDecoderSeekStatusString[] = {
242 "FLAC__STREAM_DECODER_SEEK_STATUS_OK",
243 "FLAC__STREAM_DECODER_SEEK_STATUS_ERROR",
244 "FLAC__STREAM_DECODER_SEEK_STATUS_UNSUPPORTED"
247 FLAC_API const char * const FLAC__StreamDecoderTellStatusString[] = {
248 "FLAC__STREAM_DECODER_TELL_STATUS_OK",
249 "FLAC__STREAM_DECODER_TELL_STATUS_ERROR",
250 "FLAC__STREAM_DECODER_TELL_STATUS_UNSUPPORTED"
253 FLAC_API const char * const FLAC__StreamDecoderLengthStatusString[] = {
254 "FLAC__STREAM_DECODER_LENGTH_STATUS_OK",
255 "FLAC__STREAM_DECODER_LENGTH_STATUS_ERROR",
256 "FLAC__STREAM_DECODER_LENGTH_STATUS_UNSUPPORTED"
259 FLAC_API const char * const FLAC__StreamDecoderWriteStatusString[] = {
260 "FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE",
261 "FLAC__STREAM_DECODER_WRITE_STATUS_ABORT"
264 FLAC_API const char * const FLAC__StreamDecoderErrorStatusString[] = {
265 "FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC",
266 "FLAC__STREAM_DECODER_ERROR_STATUS_BAD_HEADER",
267 "FLAC__STREAM_DECODER_ERROR_STATUS_FRAME_CRC_MISMATCH",
268 "FLAC__STREAM_DECODER_ERROR_STATUS_UNPARSEABLE_STREAM"
271 /***********************************************************************
273 * Class constructor/destructor
275 ***********************************************************************/
276 FLAC_API FLAC__StreamDecoder *FLAC__stream_decoder_new(void)
278 FLAC__StreamDecoder *decoder;
281 FLAC__ASSERT(sizeof(int) >= 4); /* we want to die right away if this is not true */
283 decoder = (FLAC__StreamDecoder*)calloc(1, sizeof(FLAC__StreamDecoder));
288 decoder->protected_ = (FLAC__StreamDecoderProtected*)calloc(1, sizeof(FLAC__StreamDecoderProtected));
289 if(decoder->protected_ == 0) {
294 decoder->private_ = (FLAC__StreamDecoderPrivate*)calloc(1, sizeof(FLAC__StreamDecoderPrivate));
295 if(decoder->private_ == 0) {
296 free(decoder->protected_);
301 decoder->private_->input = FLAC__bitreader_new();
302 if(decoder->private_->input == 0) {
303 free(decoder->private_);
304 free(decoder->protected_);
309 decoder->private_->metadata_filter_ids_capacity = 16;
310 if(0 == (decoder->private_->metadata_filter_ids = (FLAC__byte*)malloc((FLAC__STREAM_METADATA_APPLICATION_ID_LEN/8) * decoder->private_->metadata_filter_ids_capacity))) {
311 FLAC__bitreader_delete(decoder->private_->input);
312 free(decoder->private_);
313 free(decoder->protected_);
318 for(i = 0; i < FLAC__MAX_CHANNELS; i++) {
319 decoder->private_->output[i] = 0;
320 decoder->private_->residual_unaligned[i] = decoder->private_->residual[i] = 0;
323 decoder->private_->output_capacity = 0;
324 decoder->private_->output_channels = 0;
325 decoder->private_->has_seek_table = false;
327 for(i = 0; i < FLAC__MAX_CHANNELS; i++)
328 FLAC__format_entropy_coding_method_partitioned_rice_contents_init(&decoder->private_->partitioned_rice_contents[i]);
330 decoder->private_->file = 0;
332 set_defaults_(decoder);
334 decoder->protected_->state = FLAC__STREAM_DECODER_UNINITIALIZED;
339 FLAC_API void FLAC__stream_decoder_delete(FLAC__StreamDecoder *decoder)
343 FLAC__ASSERT(0 != decoder);
344 FLAC__ASSERT(0 != decoder->protected_);
345 FLAC__ASSERT(0 != decoder->private_);
346 FLAC__ASSERT(0 != decoder->private_->input);
348 (void)FLAC__stream_decoder_finish(decoder);
350 if(0 != decoder->private_->metadata_filter_ids)
351 free(decoder->private_->metadata_filter_ids);
353 FLAC__bitreader_delete(decoder->private_->input);
355 for(i = 0; i < FLAC__MAX_CHANNELS; i++)
356 FLAC__format_entropy_coding_method_partitioned_rice_contents_clear(&decoder->private_->partitioned_rice_contents[i]);
358 free(decoder->private_);
359 free(decoder->protected_);
363 /***********************************************************************
365 * Public class methods
367 ***********************************************************************/
369 static FLAC__StreamDecoderInitStatus init_stream_internal_(
370 FLAC__StreamDecoder *decoder,
371 FLAC__StreamDecoderReadCallback read_callback,
372 FLAC__StreamDecoderSeekCallback seek_callback,
373 FLAC__StreamDecoderTellCallback tell_callback,
374 FLAC__StreamDecoderLengthCallback length_callback,
375 FLAC__StreamDecoderEofCallback eof_callback,
376 FLAC__StreamDecoderWriteCallback write_callback,
377 FLAC__StreamDecoderMetadataCallback metadata_callback,
378 FLAC__StreamDecoderErrorCallback error_callback,
383 FLAC__ASSERT(0 != decoder);
385 if(decoder->protected_->state != FLAC__STREAM_DECODER_UNINITIALIZED)
386 return FLAC__STREAM_DECODER_INIT_STATUS_ALREADY_INITIALIZED;
390 return FLAC__STREAM_DECODER_INIT_STATUS_UNSUPPORTED_CONTAINER;
394 0 == read_callback ||
395 0 == write_callback ||
396 0 == error_callback ||
397 (seek_callback && (0 == tell_callback || 0 == length_callback || 0 == eof_callback))
399 return FLAC__STREAM_DECODER_INIT_STATUS_INVALID_CALLBACKS;
402 decoder->private_->is_ogg = is_ogg;
403 if(is_ogg && !FLAC__ogg_decoder_aspect_init(&decoder->protected_->ogg_decoder_aspect))
404 return decoder->protected_->state = FLAC__STREAM_DECODER_OGG_ERROR;
408 * get the CPU info and set the function pointers
410 FLAC__cpu_info(&decoder->private_->cpuinfo);
411 /* first default to the non-asm routines */
412 decoder->private_->local_lpc_restore_signal = FLAC__lpc_restore_signal;
413 decoder->private_->local_lpc_restore_signal_64bit = FLAC__lpc_restore_signal_wide;
414 decoder->private_->local_lpc_restore_signal_16bit = FLAC__lpc_restore_signal;
415 decoder->private_->local_lpc_restore_signal_16bit_order8 = FLAC__lpc_restore_signal;
416 decoder->private_->local_bitreader_read_rice_signed_block = FLAC__bitreader_read_rice_signed_block;
417 /* now override with asm where appropriate */
419 if(decoder->private_->cpuinfo.use_asm) {
420 #ifdef FLAC__CPU_IA32
421 FLAC__ASSERT(decoder->private_->cpuinfo.type == FLAC__CPUINFO_TYPE_IA32);
422 #ifdef FLAC__HAS_NASM
423 #if 1 /*@@@@@@ OPT: not clearly faster, needs more testing */
424 if(decoder->private_->cpuinfo.data.ia32.bswap)
425 decoder->private_->local_bitreader_read_rice_signed_block = FLAC__bitreader_read_rice_signed_block_asm_ia32_bswap;
427 if(decoder->private_->cpuinfo.data.ia32.mmx) {
428 decoder->private_->local_lpc_restore_signal = FLAC__lpc_restore_signal_asm_ia32;
429 decoder->private_->local_lpc_restore_signal_16bit = FLAC__lpc_restore_signal_asm_ia32_mmx;
430 decoder->private_->local_lpc_restore_signal_16bit_order8 = FLAC__lpc_restore_signal_asm_ia32_mmx;
433 decoder->private_->local_lpc_restore_signal = FLAC__lpc_restore_signal_asm_ia32;
434 decoder->private_->local_lpc_restore_signal_16bit = FLAC__lpc_restore_signal_asm_ia32;
435 decoder->private_->local_lpc_restore_signal_16bit_order8 = FLAC__lpc_restore_signal_asm_ia32;
438 #elif defined FLAC__CPU_PPC
439 FLAC__ASSERT(decoder->private_->cpuinfo.type == FLAC__CPUINFO_TYPE_PPC);
440 if(decoder->private_->cpuinfo.data.ppc.altivec) {
441 decoder->private_->local_lpc_restore_signal_16bit = FLAC__lpc_restore_signal_asm_ppc_altivec_16;
442 decoder->private_->local_lpc_restore_signal_16bit_order8 = FLAC__lpc_restore_signal_asm_ppc_altivec_16_order8;
448 /* from here on, errors are fatal */
450 if(!FLAC__bitreader_init(decoder->private_->input, decoder->private_->cpuinfo, read_callback_, decoder)) {
451 decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
452 return FLAC__STREAM_DECODER_INIT_STATUS_MEMORY_ALLOCATION_ERROR;
455 decoder->private_->read_callback = read_callback;
456 decoder->private_->seek_callback = seek_callback;
457 decoder->private_->tell_callback = tell_callback;
458 decoder->private_->length_callback = length_callback;
459 decoder->private_->eof_callback = eof_callback;
460 decoder->private_->write_callback = write_callback;
461 decoder->private_->metadata_callback = metadata_callback;
462 decoder->private_->error_callback = error_callback;
463 decoder->private_->client_data = client_data;
464 decoder->private_->fixed_block_size = decoder->private_->next_fixed_block_size = 0;
465 decoder->private_->samples_decoded = 0;
466 decoder->private_->has_stream_info = false;
467 decoder->private_->cached = false;
469 decoder->private_->do_md5_checking = decoder->protected_->md5_checking;
470 decoder->private_->is_seeking = false;
472 decoder->private_->internal_reset_hack = true; /* so the following reset does not try to rewind the input */
473 if(!FLAC__stream_decoder_reset(decoder)) {
474 /* above call sets the state for us */
475 return FLAC__STREAM_DECODER_INIT_STATUS_MEMORY_ALLOCATION_ERROR;
478 return FLAC__STREAM_DECODER_INIT_STATUS_OK;
481 FLAC_API FLAC__StreamDecoderInitStatus FLAC__stream_decoder_init_stream(
482 FLAC__StreamDecoder *decoder,
483 FLAC__StreamDecoderReadCallback read_callback,
484 FLAC__StreamDecoderSeekCallback seek_callback,
485 FLAC__StreamDecoderTellCallback tell_callback,
486 FLAC__StreamDecoderLengthCallback length_callback,
487 FLAC__StreamDecoderEofCallback eof_callback,
488 FLAC__StreamDecoderWriteCallback write_callback,
489 FLAC__StreamDecoderMetadataCallback metadata_callback,
490 FLAC__StreamDecoderErrorCallback error_callback,
494 return init_stream_internal_(
509 FLAC_API FLAC__StreamDecoderInitStatus FLAC__stream_decoder_init_ogg_stream(
510 FLAC__StreamDecoder *decoder,
511 FLAC__StreamDecoderReadCallback read_callback,
512 FLAC__StreamDecoderSeekCallback seek_callback,
513 FLAC__StreamDecoderTellCallback tell_callback,
514 FLAC__StreamDecoderLengthCallback length_callback,
515 FLAC__StreamDecoderEofCallback eof_callback,
516 FLAC__StreamDecoderWriteCallback write_callback,
517 FLAC__StreamDecoderMetadataCallback metadata_callback,
518 FLAC__StreamDecoderErrorCallback error_callback,
522 return init_stream_internal_(
537 static FLAC__StreamDecoderInitStatus init_FILE_internal_(
538 FLAC__StreamDecoder *decoder,
540 FLAC__StreamDecoderWriteCallback write_callback,
541 FLAC__StreamDecoderMetadataCallback metadata_callback,
542 FLAC__StreamDecoderErrorCallback error_callback,
547 FLAC__ASSERT(0 != decoder);
548 FLAC__ASSERT(0 != file);
550 if(decoder->protected_->state != FLAC__STREAM_DECODER_UNINITIALIZED)
551 return decoder->protected_->state = FLAC__STREAM_DECODER_INIT_STATUS_ALREADY_INITIALIZED;
553 if(0 == write_callback || 0 == error_callback)
554 return decoder->protected_->state = FLAC__STREAM_DECODER_INIT_STATUS_INVALID_CALLBACKS;
557 * To make sure that our file does not go unclosed after an error, we
558 * must assign the FILE pointer before any further error can occur in
562 file = get_binary_stdin_(); /* just to be safe */
564 decoder->private_->file = file;
566 return init_stream_internal_(
569 decoder->private_->file == stdin? 0: file_seek_callback_,
570 decoder->private_->file == stdin? 0: file_tell_callback_,
571 decoder->private_->file == stdin? 0: file_length_callback_,
581 FLAC_API FLAC__StreamDecoderInitStatus FLAC__stream_decoder_init_FILE(
582 FLAC__StreamDecoder *decoder,
584 FLAC__StreamDecoderWriteCallback write_callback,
585 FLAC__StreamDecoderMetadataCallback metadata_callback,
586 FLAC__StreamDecoderErrorCallback error_callback,
590 return init_FILE_internal_(decoder, file, write_callback, metadata_callback, error_callback, client_data, /*is_ogg=*/false);
593 FLAC_API FLAC__StreamDecoderInitStatus FLAC__stream_decoder_init_ogg_FILE(
594 FLAC__StreamDecoder *decoder,
596 FLAC__StreamDecoderWriteCallback write_callback,
597 FLAC__StreamDecoderMetadataCallback metadata_callback,
598 FLAC__StreamDecoderErrorCallback error_callback,
602 return init_FILE_internal_(decoder, file, write_callback, metadata_callback, error_callback, client_data, /*is_ogg=*/true);
605 static FLAC__StreamDecoderInitStatus init_file_internal_(
606 FLAC__StreamDecoder *decoder,
607 const char *filename,
608 FLAC__StreamDecoderWriteCallback write_callback,
609 FLAC__StreamDecoderMetadataCallback metadata_callback,
610 FLAC__StreamDecoderErrorCallback error_callback,
617 FLAC__ASSERT(0 != decoder);
620 * To make sure that our file does not go unclosed after an error, we
621 * have to do the same entrance checks here that are later performed
622 * in FLAC__stream_decoder_init_FILE() before the FILE* is assigned.
624 if(decoder->protected_->state != FLAC__STREAM_DECODER_UNINITIALIZED)
625 return decoder->protected_->state = FLAC__STREAM_DECODER_INIT_STATUS_ALREADY_INITIALIZED;
627 if(0 == write_callback || 0 == error_callback)
628 return decoder->protected_->state = FLAC__STREAM_DECODER_INIT_STATUS_INVALID_CALLBACKS;
630 file = filename? fopen(filename, "rb") : stdin;
633 return FLAC__STREAM_DECODER_INIT_STATUS_ERROR_OPENING_FILE;
635 return init_FILE_internal_(decoder, file, write_callback, metadata_callback, error_callback, client_data, is_ogg);
638 FLAC_API FLAC__StreamDecoderInitStatus FLAC__stream_decoder_init_file(
639 FLAC__StreamDecoder *decoder,
640 const char *filename,
641 FLAC__StreamDecoderWriteCallback write_callback,
642 FLAC__StreamDecoderMetadataCallback metadata_callback,
643 FLAC__StreamDecoderErrorCallback error_callback,
647 return init_file_internal_(decoder, filename, write_callback, metadata_callback, error_callback, client_data, /*is_ogg=*/false);
650 FLAC_API FLAC__StreamDecoderInitStatus FLAC__stream_decoder_init_ogg_file(
651 FLAC__StreamDecoder *decoder,
652 const char *filename,
653 FLAC__StreamDecoderWriteCallback write_callback,
654 FLAC__StreamDecoderMetadataCallback metadata_callback,
655 FLAC__StreamDecoderErrorCallback error_callback,
659 return init_file_internal_(decoder, filename, write_callback, metadata_callback, error_callback, client_data, /*is_ogg=*/true);
662 FLAC_API FLAC__bool FLAC__stream_decoder_finish(FLAC__StreamDecoder *decoder)
664 FLAC__bool md5_failed = false;
667 FLAC__ASSERT(0 != decoder);
668 FLAC__ASSERT(0 != decoder->private_);
669 FLAC__ASSERT(0 != decoder->protected_);
671 if(decoder->protected_->state == FLAC__STREAM_DECODER_UNINITIALIZED)
674 /* see the comment in FLAC__seekable_stream_decoder_reset() as to why we
675 * always call FLAC__MD5Final()
677 FLAC__MD5Final(decoder->private_->computed_md5sum, &decoder->private_->md5context);
679 if(decoder->private_->has_seek_table && 0 != decoder->private_->seek_table.data.seek_table.points) {
680 free(decoder->private_->seek_table.data.seek_table.points);
681 decoder->private_->seek_table.data.seek_table.points = 0;
682 decoder->private_->has_seek_table = false;
684 FLAC__bitreader_free(decoder->private_->input);
685 for(i = 0; i < FLAC__MAX_CHANNELS; i++) {
687 * FLAC__lpc_restore_signal_asm_ia32_mmx() requires that the
688 * output arrays have a buffer of up to 3 zeroes in front
689 * (at negative indices) for alignment purposes; we use 4
690 * to keep the data well-aligned.
692 if(0 != decoder->private_->output[i]) {
693 free(decoder->private_->output[i]-4);
694 decoder->private_->output[i] = 0;
696 if(0 != decoder->private_->residual_unaligned[i]) {
697 free(decoder->private_->residual_unaligned[i]);
698 decoder->private_->residual_unaligned[i] = decoder->private_->residual[i] = 0;
701 decoder->private_->output_capacity = 0;
702 decoder->private_->output_channels = 0;
705 if(decoder->private_->is_ogg)
706 FLAC__ogg_decoder_aspect_finish(&decoder->protected_->ogg_decoder_aspect);
709 if(0 != decoder->private_->file) {
710 if(decoder->private_->file != stdin)
711 fclose(decoder->private_->file);
712 decoder->private_->file = 0;
715 if(decoder->private_->do_md5_checking) {
716 if(memcmp(decoder->private_->stream_info.data.stream_info.md5sum, decoder->private_->computed_md5sum, 16))
719 decoder->private_->is_seeking = false;
721 set_defaults_(decoder);
723 decoder->protected_->state = FLAC__STREAM_DECODER_UNINITIALIZED;
728 FLAC_API FLAC__bool FLAC__stream_decoder_set_ogg_serial_number(FLAC__StreamDecoder *decoder, long value)
730 FLAC__ASSERT(0 != decoder);
731 FLAC__ASSERT(0 != decoder->private_);
732 FLAC__ASSERT(0 != decoder->protected_);
733 if(decoder->protected_->state != FLAC__STREAM_DECODER_UNINITIALIZED)
736 /* can't check decoder->private_->is_ogg since that's not set until init time */
737 FLAC__ogg_decoder_aspect_set_serial_number(&decoder->protected_->ogg_decoder_aspect, value);
745 FLAC_API FLAC__bool FLAC__stream_decoder_set_md5_checking(FLAC__StreamDecoder *decoder, FLAC__bool value)
747 FLAC__ASSERT(0 != decoder);
748 FLAC__ASSERT(0 != decoder->protected_);
749 if(decoder->protected_->state != FLAC__STREAM_DECODER_UNINITIALIZED)
751 decoder->protected_->md5_checking = value;
755 FLAC_API FLAC__bool FLAC__stream_decoder_set_metadata_respond(FLAC__StreamDecoder *decoder, FLAC__MetadataType type)
757 FLAC__ASSERT(0 != decoder);
758 FLAC__ASSERT(0 != decoder->private_);
759 FLAC__ASSERT(0 != decoder->protected_);
760 FLAC__ASSERT((unsigned)type <= FLAC__MAX_METADATA_TYPE_CODE);
761 /* double protection */
762 if((unsigned)type > FLAC__MAX_METADATA_TYPE_CODE)
764 if(decoder->protected_->state != FLAC__STREAM_DECODER_UNINITIALIZED)
766 decoder->private_->metadata_filter[type] = true;
767 if(type == FLAC__METADATA_TYPE_APPLICATION)
768 decoder->private_->metadata_filter_ids_count = 0;
772 FLAC_API FLAC__bool FLAC__stream_decoder_set_metadata_respond_application(FLAC__StreamDecoder *decoder, const FLAC__byte id[4])
774 FLAC__ASSERT(0 != decoder);
775 FLAC__ASSERT(0 != decoder->private_);
776 FLAC__ASSERT(0 != decoder->protected_);
777 FLAC__ASSERT(0 != id);
778 if(decoder->protected_->state != FLAC__STREAM_DECODER_UNINITIALIZED)
781 if(decoder->private_->metadata_filter[FLAC__METADATA_TYPE_APPLICATION])
784 FLAC__ASSERT(0 != decoder->private_->metadata_filter_ids);
786 if(decoder->private_->metadata_filter_ids_count == decoder->private_->metadata_filter_ids_capacity) {
787 if(0 == (decoder->private_->metadata_filter_ids = (FLAC__byte*)realloc(decoder->private_->metadata_filter_ids, decoder->private_->metadata_filter_ids_capacity * 2))) {
788 decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
791 decoder->private_->metadata_filter_ids_capacity *= 2;
794 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));
795 decoder->private_->metadata_filter_ids_count++;
800 FLAC_API FLAC__bool FLAC__stream_decoder_set_metadata_respond_all(FLAC__StreamDecoder *decoder)
803 FLAC__ASSERT(0 != decoder);
804 FLAC__ASSERT(0 != decoder->private_);
805 FLAC__ASSERT(0 != decoder->protected_);
806 if(decoder->protected_->state != FLAC__STREAM_DECODER_UNINITIALIZED)
808 for(i = 0; i < sizeof(decoder->private_->metadata_filter) / sizeof(decoder->private_->metadata_filter[0]); i++)
809 decoder->private_->metadata_filter[i] = true;
810 decoder->private_->metadata_filter_ids_count = 0;
814 FLAC_API FLAC__bool FLAC__stream_decoder_set_metadata_ignore(FLAC__StreamDecoder *decoder, FLAC__MetadataType type)
816 FLAC__ASSERT(0 != decoder);
817 FLAC__ASSERT(0 != decoder->private_);
818 FLAC__ASSERT(0 != decoder->protected_);
819 FLAC__ASSERT((unsigned)type <= FLAC__MAX_METADATA_TYPE_CODE);
820 /* double protection */
821 if((unsigned)type > FLAC__MAX_METADATA_TYPE_CODE)
823 if(decoder->protected_->state != FLAC__STREAM_DECODER_UNINITIALIZED)
825 decoder->private_->metadata_filter[type] = false;
826 if(type == FLAC__METADATA_TYPE_APPLICATION)
827 decoder->private_->metadata_filter_ids_count = 0;
831 FLAC_API FLAC__bool FLAC__stream_decoder_set_metadata_ignore_application(FLAC__StreamDecoder *decoder, const FLAC__byte id[4])
833 FLAC__ASSERT(0 != decoder);
834 FLAC__ASSERT(0 != decoder->private_);
835 FLAC__ASSERT(0 != decoder->protected_);
836 FLAC__ASSERT(0 != id);
837 if(decoder->protected_->state != FLAC__STREAM_DECODER_UNINITIALIZED)
840 if(!decoder->private_->metadata_filter[FLAC__METADATA_TYPE_APPLICATION])
843 FLAC__ASSERT(0 != decoder->private_->metadata_filter_ids);
845 if(decoder->private_->metadata_filter_ids_count == decoder->private_->metadata_filter_ids_capacity) {
846 if(0 == (decoder->private_->metadata_filter_ids = (FLAC__byte*)realloc(decoder->private_->metadata_filter_ids, decoder->private_->metadata_filter_ids_capacity * 2))) {
847 decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
850 decoder->private_->metadata_filter_ids_capacity *= 2;
853 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));
854 decoder->private_->metadata_filter_ids_count++;
859 FLAC_API FLAC__bool FLAC__stream_decoder_set_metadata_ignore_all(FLAC__StreamDecoder *decoder)
861 FLAC__ASSERT(0 != decoder);
862 FLAC__ASSERT(0 != decoder->private_);
863 FLAC__ASSERT(0 != decoder->protected_);
864 if(decoder->protected_->state != FLAC__STREAM_DECODER_UNINITIALIZED)
866 memset(decoder->private_->metadata_filter, 0, sizeof(decoder->private_->metadata_filter));
867 decoder->private_->metadata_filter_ids_count = 0;
871 FLAC_API FLAC__StreamDecoderState FLAC__stream_decoder_get_state(const FLAC__StreamDecoder *decoder)
873 FLAC__ASSERT(0 != decoder);
874 FLAC__ASSERT(0 != decoder->protected_);
875 return decoder->protected_->state;
878 FLAC_API const char *FLAC__stream_decoder_get_resolved_state_string(const FLAC__StreamDecoder *decoder)
880 return FLAC__StreamDecoderStateString[decoder->protected_->state];
883 FLAC_API FLAC__bool FLAC__stream_decoder_get_md5_checking(const FLAC__StreamDecoder *decoder)
885 FLAC__ASSERT(0 != decoder);
886 FLAC__ASSERT(0 != decoder->protected_);
887 return decoder->protected_->md5_checking;
890 FLAC_API FLAC__uint64 FLAC__stream_decoder_get_total_samples(const FLAC__StreamDecoder *decoder)
892 FLAC__ASSERT(0 != decoder);
893 FLAC__ASSERT(0 != decoder->protected_);
894 return decoder->private_->has_stream_info? decoder->private_->stream_info.data.stream_info.total_samples : 0;
897 FLAC_API unsigned FLAC__stream_decoder_get_channels(const FLAC__StreamDecoder *decoder)
899 FLAC__ASSERT(0 != decoder);
900 FLAC__ASSERT(0 != decoder->protected_);
901 return decoder->protected_->channels;
904 FLAC_API FLAC__ChannelAssignment FLAC__stream_decoder_get_channel_assignment(const FLAC__StreamDecoder *decoder)
906 FLAC__ASSERT(0 != decoder);
907 FLAC__ASSERT(0 != decoder->protected_);
908 return decoder->protected_->channel_assignment;
911 FLAC_API unsigned FLAC__stream_decoder_get_bits_per_sample(const FLAC__StreamDecoder *decoder)
913 FLAC__ASSERT(0 != decoder);
914 FLAC__ASSERT(0 != decoder->protected_);
915 return decoder->protected_->bits_per_sample;
918 FLAC_API unsigned FLAC__stream_decoder_get_sample_rate(const FLAC__StreamDecoder *decoder)
920 FLAC__ASSERT(0 != decoder);
921 FLAC__ASSERT(0 != decoder->protected_);
922 return decoder->protected_->sample_rate;
925 FLAC_API unsigned FLAC__stream_decoder_get_blocksize(const FLAC__StreamDecoder *decoder)
927 FLAC__ASSERT(0 != decoder);
928 FLAC__ASSERT(0 != decoder->protected_);
929 return decoder->protected_->blocksize;
932 FLAC_API FLAC__bool FLAC__stream_decoder_get_decode_position(const FLAC__StreamDecoder *decoder, FLAC__uint64 *position)
934 FLAC__ASSERT(0 != decoder);
935 FLAC__ASSERT(0 != decoder->private_);
936 FLAC__ASSERT(0 != position);
939 if(decoder->private_->is_ogg)
942 if(0 == decoder->private_->tell_callback)
944 if(decoder->private_->tell_callback(decoder, position, decoder->private_->client_data) != FLAC__STREAM_DECODER_TELL_STATUS_OK)
946 /* should never happen since all FLAC frames and metadata blocks are byte aligned, but check just in case */
947 if(!FLAC__bitreader_is_consumed_byte_aligned(decoder->private_->input))
949 FLAC__ASSERT(*position >= FLAC__stream_decoder_get_input_bytes_unconsumed(decoder));
950 *position -= FLAC__stream_decoder_get_input_bytes_unconsumed(decoder);
954 FLAC_API FLAC__bool FLAC__stream_decoder_flush(FLAC__StreamDecoder *decoder)
956 FLAC__ASSERT(0 != decoder);
957 FLAC__ASSERT(0 != decoder->private_);
958 FLAC__ASSERT(0 != decoder->protected_);
960 decoder->private_->samples_decoded = 0;
961 decoder->private_->do_md5_checking = false;
964 if(decoder->private_->is_ogg)
965 FLAC__ogg_decoder_aspect_flush(&decoder->protected_->ogg_decoder_aspect);
968 if(!FLAC__bitreader_clear(decoder->private_->input)) {
969 decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
972 decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
977 FLAC_API FLAC__bool FLAC__stream_decoder_reset(FLAC__StreamDecoder *decoder)
979 FLAC__ASSERT(0 != decoder);
980 FLAC__ASSERT(0 != decoder->private_);
981 FLAC__ASSERT(0 != decoder->protected_);
983 if(!FLAC__stream_decoder_flush(decoder)) {
984 /* above call sets the state for us */
989 /*@@@ could go in !internal_reset_hack block below */
990 if(decoder->private_->is_ogg)
991 FLAC__ogg_decoder_aspect_reset(&decoder->protected_->ogg_decoder_aspect);
994 /* Rewind if necessary. If FLAC__stream_decoder_init() is calling us,
995 * (internal_reset_hack) don't try to rewind since we are already at
996 * the beginning of the stream and don't want to fail if the input is
999 if(!decoder->private_->internal_reset_hack) {
1000 if(decoder->private_->file == stdin)
1001 return false; /* can't rewind stdin, reset fails */
1002 if(decoder->private_->seek_callback && decoder->private_->seek_callback(decoder, 0, decoder->private_->client_data) == FLAC__STREAM_DECODER_SEEK_STATUS_ERROR)
1003 return false; /* seekable and seek fails, reset fails */
1006 decoder->private_->internal_reset_hack = false;
1008 decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_METADATA;
1010 decoder->private_->has_stream_info = false;
1011 if(decoder->private_->has_seek_table && 0 != decoder->private_->seek_table.data.seek_table.points) {
1012 free(decoder->private_->seek_table.data.seek_table.points);
1013 decoder->private_->seek_table.data.seek_table.points = 0;
1014 decoder->private_->has_seek_table = false;
1016 decoder->private_->do_md5_checking = decoder->protected_->md5_checking;
1018 * This goes in reset() and not flush() because according to the spec, a
1019 * fixed-blocksize stream must stay that way through the whole stream.
1021 decoder->private_->fixed_block_size = decoder->private_->next_fixed_block_size = 0;
1023 /* We initialize the FLAC__MD5Context even though we may never use it. This
1024 * is because md5 checking may be turned on to start and then turned off if
1025 * a seek occurs. So we init the context here and finalize it in
1026 * FLAC__stream_decoder_finish() to make sure things are always cleaned up
1029 FLAC__MD5Init(&decoder->private_->md5context);
1031 decoder->private_->first_frame_offset = 0;
1032 decoder->private_->unparseable_frame_count = 0;
1037 FLAC_API FLAC__bool FLAC__stream_decoder_process_single(FLAC__StreamDecoder *decoder)
1039 FLAC__bool got_a_frame;
1040 FLAC__ASSERT(0 != decoder);
1041 FLAC__ASSERT(0 != decoder->protected_);
1044 switch(decoder->protected_->state) {
1045 case FLAC__STREAM_DECODER_SEARCH_FOR_METADATA:
1046 if(!find_metadata_(decoder))
1047 return false; /* above function sets the status for us */
1049 case FLAC__STREAM_DECODER_READ_METADATA:
1050 if(!read_metadata_(decoder))
1051 return false; /* above function sets the status for us */
1054 case FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC:
1055 if(!frame_sync_(decoder))
1056 return true; /* above function sets the status for us */
1058 case FLAC__STREAM_DECODER_READ_FRAME:
1059 if(!read_frame_(decoder, &got_a_frame, /*do_full_decode=*/true))
1060 return false; /* above function sets the status for us */
1062 return true; /* above function sets the status for us */
1064 case FLAC__STREAM_DECODER_END_OF_STREAM:
1065 case FLAC__STREAM_DECODER_ABORTED:
1074 FLAC_API FLAC__bool FLAC__stream_decoder_process_until_end_of_metadata(FLAC__StreamDecoder *decoder)
1076 FLAC__ASSERT(0 != decoder);
1077 FLAC__ASSERT(0 != decoder->protected_);
1080 switch(decoder->protected_->state) {
1081 case FLAC__STREAM_DECODER_SEARCH_FOR_METADATA:
1082 if(!find_metadata_(decoder))
1083 return false; /* above function sets the status for us */
1085 case FLAC__STREAM_DECODER_READ_METADATA:
1086 if(!read_metadata_(decoder))
1087 return false; /* above function sets the status for us */
1089 case FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC:
1090 case FLAC__STREAM_DECODER_READ_FRAME:
1091 case FLAC__STREAM_DECODER_END_OF_STREAM:
1092 case FLAC__STREAM_DECODER_ABORTED:
1101 FLAC_API FLAC__bool FLAC__stream_decoder_process_until_end_of_stream(FLAC__StreamDecoder *decoder)
1104 FLAC__ASSERT(0 != decoder);
1105 FLAC__ASSERT(0 != decoder->protected_);
1108 switch(decoder->protected_->state) {
1109 case FLAC__STREAM_DECODER_SEARCH_FOR_METADATA:
1110 if(!find_metadata_(decoder))
1111 return false; /* above function sets the status for us */
1113 case FLAC__STREAM_DECODER_READ_METADATA:
1114 if(!read_metadata_(decoder))
1115 return false; /* above function sets the status for us */
1117 case FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC:
1118 if(!frame_sync_(decoder))
1119 return true; /* above function sets the status for us */
1121 case FLAC__STREAM_DECODER_READ_FRAME:
1122 if(!read_frame_(decoder, &dummy, /*do_full_decode=*/true))
1123 return false; /* above function sets the status for us */
1125 case FLAC__STREAM_DECODER_END_OF_STREAM:
1126 case FLAC__STREAM_DECODER_ABORTED:
1135 FLAC_API FLAC__bool FLAC__stream_decoder_skip_single_frame(FLAC__StreamDecoder *decoder)
1137 FLAC__bool got_a_frame;
1138 FLAC__ASSERT(0 != decoder);
1139 FLAC__ASSERT(0 != decoder->protected_);
1142 switch(decoder->protected_->state) {
1143 case FLAC__STREAM_DECODER_SEARCH_FOR_METADATA:
1144 case FLAC__STREAM_DECODER_READ_METADATA:
1145 return false; /* above function sets the status for us */
1146 case FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC:
1147 if(!frame_sync_(decoder))
1148 return true; /* above function sets the status for us */
1150 case FLAC__STREAM_DECODER_READ_FRAME:
1151 if(!read_frame_(decoder, &got_a_frame, /*do_full_decode=*/false))
1152 return false; /* above function sets the status for us */
1154 return true; /* above function sets the status for us */
1156 case FLAC__STREAM_DECODER_END_OF_STREAM:
1157 case FLAC__STREAM_DECODER_ABORTED:
1166 FLAC_API FLAC__bool FLAC__stream_decoder_seek_absolute(FLAC__StreamDecoder *decoder, FLAC__uint64 sample)
1168 FLAC__uint64 length;
1170 FLAC__ASSERT(0 != decoder);
1173 decoder->protected_->state != FLAC__STREAM_DECODER_SEARCH_FOR_METADATA &&
1174 decoder->protected_->state != FLAC__STREAM_DECODER_READ_METADATA &&
1175 decoder->protected_->state != FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC &&
1176 decoder->protected_->state != FLAC__STREAM_DECODER_READ_FRAME &&
1177 decoder->protected_->state != FLAC__STREAM_DECODER_END_OF_STREAM
1181 if(0 == decoder->private_->seek_callback)
1184 FLAC__ASSERT(decoder->private_->seek_callback);
1185 FLAC__ASSERT(decoder->private_->tell_callback);
1186 FLAC__ASSERT(decoder->private_->length_callback);
1187 FLAC__ASSERT(decoder->private_->eof_callback);
1189 if(FLAC__stream_decoder_get_total_samples(decoder) > 0 && sample >= FLAC__stream_decoder_get_total_samples(decoder))
1192 decoder->private_->is_seeking = true;
1194 /* turn off md5 checking if a seek is attempted */
1195 decoder->private_->do_md5_checking = false;
1197 /* 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) */
1198 if(decoder->private_->length_callback(decoder, &length, decoder->private_->client_data) != FLAC__STREAM_DECODER_LENGTH_STATUS_OK) {
1199 decoder->private_->is_seeking = false;
1203 /* if we haven't finished processing the metadata yet, do that so we have the STREAMINFO, SEEK_TABLE, and first_frame_offset */
1205 decoder->protected_->state == FLAC__STREAM_DECODER_SEARCH_FOR_METADATA ||
1206 decoder->protected_->state == FLAC__STREAM_DECODER_READ_METADATA
1208 if(!FLAC__stream_decoder_process_until_end_of_metadata(decoder)) {
1209 /* above call sets the state for us */
1210 decoder->private_->is_seeking = false;
1213 /* check this again in case we didn't know total_samples the first time */
1214 if(FLAC__stream_decoder_get_total_samples(decoder) > 0 && sample >= FLAC__stream_decoder_get_total_samples(decoder)) {
1215 decoder->private_->is_seeking = false;
1221 const FLAC__bool ok =
1223 decoder->private_->is_ogg?
1224 seek_to_absolute_sample_ogg_(decoder, length, sample) :
1226 seek_to_absolute_sample_(decoder, length, sample)
1228 decoder->private_->is_seeking = false;
1233 /***********************************************************************
1235 * Protected class methods
1237 ***********************************************************************/
1239 unsigned FLAC__stream_decoder_get_input_bytes_unconsumed(const FLAC__StreamDecoder *decoder)
1241 FLAC__ASSERT(0 != decoder);
1242 FLAC__ASSERT(FLAC__bitreader_is_consumed_byte_aligned(decoder->private_->input));
1243 FLAC__ASSERT(!(FLAC__bitreader_get_input_bits_unconsumed(decoder->private_->input) & 7));
1244 return FLAC__bitreader_get_input_bits_unconsumed(decoder->private_->input) / 8;
1247 /***********************************************************************
1249 * Private class methods
1251 ***********************************************************************/
1253 void set_defaults_(FLAC__StreamDecoder *decoder)
1256 decoder->private_->is_ogg = false;
1258 decoder->private_->read_callback = 0;
1259 decoder->private_->seek_callback = 0;
1260 decoder->private_->tell_callback = 0;
1261 decoder->private_->length_callback = 0;
1262 decoder->private_->eof_callback = 0;
1263 decoder->private_->write_callback = 0;
1264 decoder->private_->metadata_callback = 0;
1265 decoder->private_->error_callback = 0;
1266 decoder->private_->client_data = 0;
1268 memset(decoder->private_->metadata_filter, 0, sizeof(decoder->private_->metadata_filter));
1269 decoder->private_->metadata_filter[FLAC__METADATA_TYPE_STREAMINFO] = true;
1270 decoder->private_->metadata_filter_ids_count = 0;
1272 decoder->protected_->md5_checking = false;
1275 FLAC__ogg_decoder_aspect_set_defaults(&decoder->protected_->ogg_decoder_aspect);
1280 * This will forcibly set stdin to binary mode (for OSes that require it)
1282 FILE *get_binary_stdin_(void)
1284 /* if something breaks here it is probably due to the presence or
1285 * absence of an underscore before the identifiers 'setmode',
1286 * 'fileno', and/or 'O_BINARY'; check your system header files.
1288 #if defined _MSC_VER || defined __MINGW32__
1289 _setmode(_fileno(stdin), _O_BINARY);
1290 #elif defined __CYGWIN__
1291 /* almost certainly not needed for any modern Cygwin, but let's be safe... */
1292 setmode(_fileno(stdin), _O_BINARY);
1293 #elif defined __EMX__
1294 setmode(fileno(stdin), O_BINARY);
1300 FLAC__bool allocate_output_(FLAC__StreamDecoder *decoder, unsigned size, unsigned channels)
1305 if(size <= decoder->private_->output_capacity && channels <= decoder->private_->output_channels)
1308 /* simply using realloc() is not practical because the number of channels may change mid-stream */
1310 for(i = 0; i < FLAC__MAX_CHANNELS; i++) {
1311 if(0 != decoder->private_->output[i]) {
1312 free(decoder->private_->output[i]-4);
1313 decoder->private_->output[i] = 0;
1315 if(0 != decoder->private_->residual_unaligned[i]) {
1316 free(decoder->private_->residual_unaligned[i]);
1317 decoder->private_->residual_unaligned[i] = decoder->private_->residual[i] = 0;
1321 for(i = 0; i < channels; i++) {
1323 * FLAC__lpc_restore_signal_asm_ia32_mmx() requires that the
1324 * output arrays have a buffer of up to 3 zeroes in front
1325 * (at negative indices) for alignment purposes; we use 4
1326 * to keep the data well-aligned.
1328 tmp = (FLAC__int32*)malloc(sizeof(FLAC__int32)*(size+4));
1330 decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
1333 memset(tmp, 0, sizeof(FLAC__int32)*4);
1334 decoder->private_->output[i] = tmp + 4;
1337 * minimum of quadword alignment for PPC vector optimizations is REQUIRED:
1339 if(!FLAC__memory_alloc_aligned_int32_array(size, &decoder->private_->residual_unaligned[i], &decoder->private_->residual[i])) {
1340 decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
1345 decoder->private_->output_capacity = size;
1346 decoder->private_->output_channels = channels;
1351 FLAC__bool has_id_filtered_(FLAC__StreamDecoder *decoder, FLAC__byte *id)
1355 FLAC__ASSERT(0 != decoder);
1356 FLAC__ASSERT(0 != decoder->private_);
1358 for(i = 0; i < decoder->private_->metadata_filter_ids_count; i++)
1359 if(0 == memcmp(decoder->private_->metadata_filter_ids + i * (FLAC__STREAM_METADATA_APPLICATION_ID_LEN/8), id, (FLAC__STREAM_METADATA_APPLICATION_ID_LEN/8)))
1365 FLAC__bool find_metadata_(FLAC__StreamDecoder *decoder)
1369 FLAC__bool first = true;
1371 FLAC__ASSERT(FLAC__bitreader_is_consumed_byte_aligned(decoder->private_->input));
1373 for(i = id = 0; i < 4; ) {
1374 if(decoder->private_->cached) {
1375 x = (FLAC__uint32)decoder->private_->lookahead;
1376 decoder->private_->cached = false;
1379 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, 8))
1380 return false; /* read_callback_ sets the state for us */
1382 if(x == FLAC__STREAM_SYNC_STRING[i]) {
1388 if(x == ID3V2_TAG_[id]) {
1392 if(!skip_id3v2_tag_(decoder))
1393 return false; /* skip_id3v2_tag_ sets the state for us */
1398 if(x == 0xff) { /* MAGIC NUMBER for the first 8 frame sync bits */
1399 decoder->private_->header_warmup[0] = (FLAC__byte)x;
1400 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, 8))
1401 return false; /* read_callback_ sets the state for us */
1403 /* 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 */
1404 /* else we have to check if the second byte is the end of a sync code */
1405 if(x == 0xff) { /* MAGIC NUMBER for the first 8 frame sync bits */
1406 decoder->private_->lookahead = (FLAC__byte)x;
1407 decoder->private_->cached = true;
1409 else if(x >> 2 == 0x3e) { /* MAGIC NUMBER for the last 6 sync bits */
1410 decoder->private_->header_warmup[1] = (FLAC__byte)x;
1411 decoder->protected_->state = FLAC__STREAM_DECODER_READ_FRAME;
1417 send_error_to_client_(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC);
1422 decoder->protected_->state = FLAC__STREAM_DECODER_READ_METADATA;
1426 FLAC__bool read_metadata_(FLAC__StreamDecoder *decoder)
1429 FLAC__uint32 i, x, type, length;
1431 FLAC__ASSERT(FLAC__bitreader_is_consumed_byte_aligned(decoder->private_->input));
1433 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_IS_LAST_LEN))
1434 return false; /* read_callback_ sets the state for us */
1435 is_last = x? true : false;
1437 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &type, FLAC__STREAM_METADATA_TYPE_LEN))
1438 return false; /* read_callback_ sets the state for us */
1440 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &length, FLAC__STREAM_METADATA_LENGTH_LEN))
1441 return false; /* read_callback_ sets the state for us */
1443 if(type == FLAC__METADATA_TYPE_STREAMINFO) {
1444 if(!read_metadata_streaminfo_(decoder, is_last, length))
1447 decoder->private_->has_stream_info = true;
1448 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))
1449 decoder->private_->do_md5_checking = false;
1450 if(!decoder->private_->is_seeking && decoder->private_->metadata_filter[FLAC__METADATA_TYPE_STREAMINFO] && decoder->private_->metadata_callback)
1451 decoder->private_->metadata_callback(decoder, &decoder->private_->stream_info, decoder->private_->client_data);
1453 else if(type == FLAC__METADATA_TYPE_SEEKTABLE) {
1454 if(!read_metadata_seektable_(decoder, is_last, length))
1457 decoder->private_->has_seek_table = true;
1458 if(!decoder->private_->is_seeking && decoder->private_->metadata_filter[FLAC__METADATA_TYPE_SEEKTABLE] && decoder->private_->metadata_callback)
1459 decoder->private_->metadata_callback(decoder, &decoder->private_->seek_table, decoder->private_->client_data);
1462 FLAC__bool skip_it = !decoder->private_->metadata_filter[type];
1463 unsigned real_length = length;
1464 FLAC__StreamMetadata block;
1466 block.is_last = is_last;
1467 block.type = (FLAC__MetadataType)type;
1468 block.length = length;
1470 if(type == FLAC__METADATA_TYPE_APPLICATION) {
1471 if(!FLAC__bitreader_read_byte_block_aligned_no_crc(decoder->private_->input, block.data.application.id, FLAC__STREAM_METADATA_APPLICATION_ID_LEN/8))
1472 return false; /* read_callback_ sets the state for us */
1474 real_length -= FLAC__STREAM_METADATA_APPLICATION_ID_LEN/8;
1476 if(decoder->private_->metadata_filter_ids_count > 0 && has_id_filtered_(decoder, block.data.application.id))
1481 if(!FLAC__bitreader_skip_byte_block_aligned_no_crc(decoder->private_->input, real_length))
1482 return false; /* read_callback_ sets the state for us */
1486 case FLAC__METADATA_TYPE_PADDING:
1487 /* skip the padding bytes */
1488 if(!FLAC__bitreader_skip_byte_block_aligned_no_crc(decoder->private_->input, real_length))
1489 return false; /* read_callback_ sets the state for us */
1491 case FLAC__METADATA_TYPE_APPLICATION:
1492 /* remember, we read the ID already */
1493 if(real_length > 0) {
1494 if(0 == (block.data.application.data = (FLAC__byte*)malloc(real_length))) {
1495 decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
1498 if(!FLAC__bitreader_read_byte_block_aligned_no_crc(decoder->private_->input, block.data.application.data, real_length))
1499 return false; /* read_callback_ sets the state for us */
1502 block.data.application.data = 0;
1504 case FLAC__METADATA_TYPE_VORBIS_COMMENT:
1505 if(!read_metadata_vorbiscomment_(decoder, &block.data.vorbis_comment))
1508 case FLAC__METADATA_TYPE_CUESHEET:
1509 if(!read_metadata_cuesheet_(decoder, &block.data.cue_sheet))
1512 case FLAC__METADATA_TYPE_PICTURE:
1513 if(!read_metadata_picture_(decoder, &block.data.picture))
1516 case FLAC__METADATA_TYPE_STREAMINFO:
1517 case FLAC__METADATA_TYPE_SEEKTABLE:
1521 if(real_length > 0) {
1522 if(0 == (block.data.unknown.data = (FLAC__byte*)malloc(real_length))) {
1523 decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
1526 if(!FLAC__bitreader_read_byte_block_aligned_no_crc(decoder->private_->input, block.data.unknown.data, real_length))
1527 return false; /* read_callback_ sets the state for us */
1530 block.data.unknown.data = 0;
1533 if(!decoder->private_->is_seeking && decoder->private_->metadata_callback)
1534 decoder->private_->metadata_callback(decoder, &block, decoder->private_->client_data);
1536 /* now we have to free any malloc'ed data in the block */
1538 case FLAC__METADATA_TYPE_PADDING:
1540 case FLAC__METADATA_TYPE_APPLICATION:
1541 if(0 != block.data.application.data)
1542 free(block.data.application.data);
1544 case FLAC__METADATA_TYPE_VORBIS_COMMENT:
1545 if(0 != block.data.vorbis_comment.vendor_string.entry)
1546 free(block.data.vorbis_comment.vendor_string.entry);
1547 if(block.data.vorbis_comment.num_comments > 0)
1548 for(i = 0; i < block.data.vorbis_comment.num_comments; i++)
1549 if(0 != block.data.vorbis_comment.comments[i].entry)
1550 free(block.data.vorbis_comment.comments[i].entry);
1551 if(0 != block.data.vorbis_comment.comments)
1552 free(block.data.vorbis_comment.comments);
1554 case FLAC__METADATA_TYPE_CUESHEET:
1555 if(block.data.cue_sheet.num_tracks > 0)
1556 for(i = 0; i < block.data.cue_sheet.num_tracks; i++)
1557 if(0 != block.data.cue_sheet.tracks[i].indices)
1558 free(block.data.cue_sheet.tracks[i].indices);
1559 if(0 != block.data.cue_sheet.tracks)
1560 free(block.data.cue_sheet.tracks);
1562 case FLAC__METADATA_TYPE_PICTURE:
1563 if(0 != block.data.picture.mime_type)
1564 free(block.data.picture.mime_type);
1565 if(0 != block.data.picture.description)
1566 free(block.data.picture.description);
1567 if(0 != block.data.picture.data)
1568 free(block.data.picture.data);
1570 case FLAC__METADATA_TYPE_STREAMINFO:
1571 case FLAC__METADATA_TYPE_SEEKTABLE:
1574 if(0 != block.data.unknown.data)
1575 free(block.data.unknown.data);
1582 /* if this fails, it's OK, it's just a hint for the seek routine */
1583 if(!FLAC__stream_decoder_get_decode_position(decoder, &decoder->private_->first_frame_offset))
1584 decoder->private_->first_frame_offset = 0;
1585 decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
1591 FLAC__bool read_metadata_streaminfo_(FLAC__StreamDecoder *decoder, FLAC__bool is_last, unsigned length)
1594 unsigned bits, used_bits = 0;
1596 FLAC__ASSERT(FLAC__bitreader_is_consumed_byte_aligned(decoder->private_->input));
1598 decoder->private_->stream_info.type = FLAC__METADATA_TYPE_STREAMINFO;
1599 decoder->private_->stream_info.is_last = is_last;
1600 decoder->private_->stream_info.length = length;
1602 bits = FLAC__STREAM_METADATA_STREAMINFO_MIN_BLOCK_SIZE_LEN;
1603 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, bits))
1604 return false; /* read_callback_ sets the state for us */
1605 decoder->private_->stream_info.data.stream_info.min_blocksize = x;
1608 bits = FLAC__STREAM_METADATA_STREAMINFO_MAX_BLOCK_SIZE_LEN;
1609 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_STREAMINFO_MAX_BLOCK_SIZE_LEN))
1610 return false; /* read_callback_ sets the state for us */
1611 decoder->private_->stream_info.data.stream_info.max_blocksize = x;
1614 bits = FLAC__STREAM_METADATA_STREAMINFO_MIN_FRAME_SIZE_LEN;
1615 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_STREAMINFO_MIN_FRAME_SIZE_LEN))
1616 return false; /* read_callback_ sets the state for us */
1617 decoder->private_->stream_info.data.stream_info.min_framesize = x;
1620 bits = FLAC__STREAM_METADATA_STREAMINFO_MAX_FRAME_SIZE_LEN;
1621 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_STREAMINFO_MAX_FRAME_SIZE_LEN))
1622 return false; /* read_callback_ sets the state for us */
1623 decoder->private_->stream_info.data.stream_info.max_framesize = x;
1626 bits = FLAC__STREAM_METADATA_STREAMINFO_SAMPLE_RATE_LEN;
1627 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_STREAMINFO_SAMPLE_RATE_LEN))
1628 return false; /* read_callback_ sets the state for us */
1629 decoder->private_->stream_info.data.stream_info.sample_rate = x;
1632 bits = FLAC__STREAM_METADATA_STREAMINFO_CHANNELS_LEN;
1633 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_STREAMINFO_CHANNELS_LEN))
1634 return false; /* read_callback_ sets the state for us */
1635 decoder->private_->stream_info.data.stream_info.channels = x+1;
1638 bits = FLAC__STREAM_METADATA_STREAMINFO_BITS_PER_SAMPLE_LEN;
1639 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_STREAMINFO_BITS_PER_SAMPLE_LEN))
1640 return false; /* read_callback_ sets the state for us */
1641 decoder->private_->stream_info.data.stream_info.bits_per_sample = x+1;
1644 bits = FLAC__STREAM_METADATA_STREAMINFO_TOTAL_SAMPLES_LEN;
1645 if(!FLAC__bitreader_read_raw_uint64(decoder->private_->input, &decoder->private_->stream_info.data.stream_info.total_samples, FLAC__STREAM_METADATA_STREAMINFO_TOTAL_SAMPLES_LEN))
1646 return false; /* read_callback_ sets the state for us */
1649 if(!FLAC__bitreader_read_byte_block_aligned_no_crc(decoder->private_->input, decoder->private_->stream_info.data.stream_info.md5sum, 16))
1650 return false; /* read_callback_ sets the state for us */
1653 /* skip the rest of the block */
1654 FLAC__ASSERT(used_bits % 8 == 0);
1655 length -= (used_bits / 8);
1656 if(!FLAC__bitreader_skip_byte_block_aligned_no_crc(decoder->private_->input, length))
1657 return false; /* read_callback_ sets the state for us */
1662 FLAC__bool read_metadata_seektable_(FLAC__StreamDecoder *decoder, FLAC__bool is_last, unsigned length)
1667 FLAC__ASSERT(FLAC__bitreader_is_consumed_byte_aligned(decoder->private_->input));
1669 decoder->private_->seek_table.type = FLAC__METADATA_TYPE_SEEKTABLE;
1670 decoder->private_->seek_table.is_last = is_last;
1671 decoder->private_->seek_table.length = length;
1673 decoder->private_->seek_table.data.seek_table.num_points = length / FLAC__STREAM_METADATA_SEEKPOINT_LENGTH;
1675 /* use realloc since we may pass through here several times (e.g. after seeking) */
1676 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)))) {
1677 decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
1680 for(i = 0; i < decoder->private_->seek_table.data.seek_table.num_points; i++) {
1681 if(!FLAC__bitreader_read_raw_uint64(decoder->private_->input, &xx, FLAC__STREAM_METADATA_SEEKPOINT_SAMPLE_NUMBER_LEN))
1682 return false; /* read_callback_ sets the state for us */
1683 decoder->private_->seek_table.data.seek_table.points[i].sample_number = xx;
1685 if(!FLAC__bitreader_read_raw_uint64(decoder->private_->input, &xx, FLAC__STREAM_METADATA_SEEKPOINT_STREAM_OFFSET_LEN))
1686 return false; /* read_callback_ sets the state for us */
1687 decoder->private_->seek_table.data.seek_table.points[i].stream_offset = xx;
1689 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_SEEKPOINT_FRAME_SAMPLES_LEN))
1690 return false; /* read_callback_ sets the state for us */
1691 decoder->private_->seek_table.data.seek_table.points[i].frame_samples = x;
1693 length -= (decoder->private_->seek_table.data.seek_table.num_points * FLAC__STREAM_METADATA_SEEKPOINT_LENGTH);
1694 /* if there is a partial point left, skip over it */
1696 /*@@@ do a send_error_to_client_() here? there's an argument for either way */
1697 if(!FLAC__bitreader_skip_byte_block_aligned_no_crc(decoder->private_->input, length))
1698 return false; /* read_callback_ sets the state for us */
1704 FLAC__bool read_metadata_vorbiscomment_(FLAC__StreamDecoder *decoder, FLAC__StreamMetadata_VorbisComment *obj)
1708 FLAC__ASSERT(FLAC__bitreader_is_consumed_byte_aligned(decoder->private_->input));
1710 /* read vendor string */
1711 FLAC__ASSERT(FLAC__STREAM_METADATA_VORBIS_COMMENT_ENTRY_LENGTH_LEN == 32);
1712 if(!FLAC__bitreader_read_uint32_little_endian(decoder->private_->input, &obj->vendor_string.length))
1713 return false; /* read_callback_ sets the state for us */
1714 if(obj->vendor_string.length > 0) {
1715 if(0 == (obj->vendor_string.entry = (FLAC__byte*)malloc(obj->vendor_string.length+1))) {
1716 decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
1719 if(!FLAC__bitreader_read_byte_block_aligned_no_crc(decoder->private_->input, obj->vendor_string.entry, obj->vendor_string.length))
1720 return false; /* read_callback_ sets the state for us */
1721 obj->vendor_string.entry[obj->vendor_string.length] = '\0';
1724 obj->vendor_string.entry = 0;
1726 /* read num comments */
1727 FLAC__ASSERT(FLAC__STREAM_METADATA_VORBIS_COMMENT_NUM_COMMENTS_LEN == 32);
1728 if(!FLAC__bitreader_read_uint32_little_endian(decoder->private_->input, &obj->num_comments))
1729 return false; /* read_callback_ sets the state for us */
1732 if(obj->num_comments > 0) {
1733 if(0 == (obj->comments = (FLAC__StreamMetadata_VorbisComment_Entry*)malloc(obj->num_comments * sizeof(FLAC__StreamMetadata_VorbisComment_Entry)))) {
1734 decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
1737 for(i = 0; i < obj->num_comments; i++) {
1738 FLAC__ASSERT(FLAC__STREAM_METADATA_VORBIS_COMMENT_ENTRY_LENGTH_LEN == 32);
1739 if(!FLAC__bitreader_read_uint32_little_endian(decoder->private_->input, &obj->comments[i].length))
1740 return false; /* read_callback_ sets the state for us */
1741 if(obj->comments[i].length > 0) {
1742 if(0 == (obj->comments[i].entry = (FLAC__byte*)malloc(obj->comments[i].length+1))) {
1743 decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
1746 if(!FLAC__bitreader_read_byte_block_aligned_no_crc(decoder->private_->input, obj->comments[i].entry, obj->comments[i].length))
1747 return false; /* read_callback_ sets the state for us */
1748 obj->comments[i].entry[obj->comments[i].length] = '\0';
1751 obj->comments[i].entry = 0;
1761 FLAC__bool read_metadata_cuesheet_(FLAC__StreamDecoder *decoder, FLAC__StreamMetadata_CueSheet *obj)
1763 FLAC__uint32 i, j, x;
1765 FLAC__ASSERT(FLAC__bitreader_is_consumed_byte_aligned(decoder->private_->input));
1767 memset(obj, 0, sizeof(FLAC__StreamMetadata_CueSheet));
1769 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_MEDIA_CATALOG_NUMBER_LEN % 8 == 0);
1770 if(!FLAC__bitreader_read_byte_block_aligned_no_crc(decoder->private_->input, (FLAC__byte*)obj->media_catalog_number, FLAC__STREAM_METADATA_CUESHEET_MEDIA_CATALOG_NUMBER_LEN/8))
1771 return false; /* read_callback_ sets the state for us */
1773 if(!FLAC__bitreader_read_raw_uint64(decoder->private_->input, &obj->lead_in, FLAC__STREAM_METADATA_CUESHEET_LEAD_IN_LEN))
1774 return false; /* read_callback_ sets the state for us */
1776 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_CUESHEET_IS_CD_LEN))
1777 return false; /* read_callback_ sets the state for us */
1778 obj->is_cd = x? true : false;
1780 if(!FLAC__bitreader_skip_bits_no_crc(decoder->private_->input, FLAC__STREAM_METADATA_CUESHEET_RESERVED_LEN))
1781 return false; /* read_callback_ sets the state for us */
1783 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_CUESHEET_NUM_TRACKS_LEN))
1784 return false; /* read_callback_ sets the state for us */
1785 obj->num_tracks = x;
1787 if(obj->num_tracks > 0) {
1788 if(0 == (obj->tracks = (FLAC__StreamMetadata_CueSheet_Track*)calloc(obj->num_tracks, sizeof(FLAC__StreamMetadata_CueSheet_Track)))) {
1789 decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
1792 for(i = 0; i < obj->num_tracks; i++) {
1793 FLAC__StreamMetadata_CueSheet_Track *track = &obj->tracks[i];
1794 if(!FLAC__bitreader_read_raw_uint64(decoder->private_->input, &track->offset, FLAC__STREAM_METADATA_CUESHEET_TRACK_OFFSET_LEN))
1795 return false; /* read_callback_ sets the state for us */
1797 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_CUESHEET_TRACK_NUMBER_LEN))
1798 return false; /* read_callback_ sets the state for us */
1799 track->number = (FLAC__byte)x;
1801 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_ISRC_LEN % 8 == 0);
1802 if(!FLAC__bitreader_read_byte_block_aligned_no_crc(decoder->private_->input, (FLAC__byte*)track->isrc, FLAC__STREAM_METADATA_CUESHEET_TRACK_ISRC_LEN/8))
1803 return false; /* read_callback_ sets the state for us */
1805 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_CUESHEET_TRACK_TYPE_LEN))
1806 return false; /* read_callback_ sets the state for us */
1809 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_CUESHEET_TRACK_PRE_EMPHASIS_LEN))
1810 return false; /* read_callback_ sets the state for us */
1811 track->pre_emphasis = x;
1813 if(!FLAC__bitreader_skip_bits_no_crc(decoder->private_->input, FLAC__STREAM_METADATA_CUESHEET_TRACK_RESERVED_LEN))
1814 return false; /* read_callback_ sets the state for us */
1816 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_CUESHEET_TRACK_NUM_INDICES_LEN))
1817 return false; /* read_callback_ sets the state for us */
1818 track->num_indices = (FLAC__byte)x;
1820 if(track->num_indices > 0) {
1821 if(0 == (track->indices = (FLAC__StreamMetadata_CueSheet_Index*)calloc(track->num_indices, sizeof(FLAC__StreamMetadata_CueSheet_Index)))) {
1822 decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
1825 for(j = 0; j < track->num_indices; j++) {
1826 FLAC__StreamMetadata_CueSheet_Index *index = &track->indices[j];
1827 if(!FLAC__bitreader_read_raw_uint64(decoder->private_->input, &index->offset, FLAC__STREAM_METADATA_CUESHEET_INDEX_OFFSET_LEN))
1828 return false; /* read_callback_ sets the state for us */
1830 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_CUESHEET_INDEX_NUMBER_LEN))
1831 return false; /* read_callback_ sets the state for us */
1832 index->number = (FLAC__byte)x;
1834 if(!FLAC__bitreader_skip_bits_no_crc(decoder->private_->input, FLAC__STREAM_METADATA_CUESHEET_INDEX_RESERVED_LEN))
1835 return false; /* read_callback_ sets the state for us */
1844 FLAC__bool read_metadata_picture_(FLAC__StreamDecoder *decoder, FLAC__StreamMetadata_Picture *obj)
1848 FLAC__ASSERT(FLAC__bitreader_is_consumed_byte_aligned(decoder->private_->input));
1851 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_PICTURE_TYPE_LEN))
1852 return false; /* read_callback_ sets the state for us */
1855 /* read MIME type */
1856 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_PICTURE_MIME_TYPE_LENGTH_LEN))
1857 return false; /* read_callback_ sets the state for us */
1858 if(0 == (obj->mime_type = (char*)malloc(x+1))) {
1859 decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
1863 if(!FLAC__bitreader_read_byte_block_aligned_no_crc(decoder->private_->input, (FLAC__byte*)obj->mime_type, x))
1864 return false; /* read_callback_ sets the state for us */
1866 obj->mime_type[x] = '\0';
1868 /* read description */
1869 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_PICTURE_DESCRIPTION_LENGTH_LEN))
1870 return false; /* read_callback_ sets the state for us */
1871 if(0 == (obj->description = (FLAC__byte*)malloc(x+1))) {
1872 decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
1876 if(!FLAC__bitreader_read_byte_block_aligned_no_crc(decoder->private_->input, obj->description, x))
1877 return false; /* read_callback_ sets the state for us */
1879 obj->description[x] = '\0';
1882 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &obj->width, FLAC__STREAM_METADATA_PICTURE_WIDTH_LEN))
1883 return false; /* read_callback_ sets the state for us */
1886 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &obj->height, FLAC__STREAM_METADATA_PICTURE_HEIGHT_LEN))
1887 return false; /* read_callback_ sets the state for us */
1890 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &obj->depth, FLAC__STREAM_METADATA_PICTURE_DEPTH_LEN))
1891 return false; /* read_callback_ sets the state for us */
1894 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &obj->colors, FLAC__STREAM_METADATA_PICTURE_COLORS_LEN))
1895 return false; /* read_callback_ sets the state for us */
1898 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &(obj->data_length), FLAC__STREAM_METADATA_PICTURE_DATA_LENGTH_LEN))
1899 return false; /* read_callback_ sets the state for us */
1900 if(0 == (obj->data = (FLAC__byte*)malloc(obj->data_length))) {
1901 decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
1904 if(obj->data_length > 0) {
1905 if(!FLAC__bitreader_read_byte_block_aligned_no_crc(decoder->private_->input, obj->data, obj->data_length))
1906 return false; /* read_callback_ sets the state for us */
1912 FLAC__bool skip_id3v2_tag_(FLAC__StreamDecoder *decoder)
1917 /* skip the version and flags bytes */
1918 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, 24))
1919 return false; /* read_callback_ sets the state for us */
1920 /* get the size (in bytes) to skip */
1922 for(i = 0; i < 4; i++) {
1923 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, 8))
1924 return false; /* read_callback_ sets the state for us */
1928 /* skip the rest of the tag */
1929 if(!FLAC__bitreader_skip_byte_block_aligned_no_crc(decoder->private_->input, skip))
1930 return false; /* read_callback_ sets the state for us */
1934 FLAC__bool frame_sync_(FLAC__StreamDecoder *decoder)
1937 FLAC__bool first = true;
1939 /* If we know the total number of samples in the stream, stop if we've read that many. */
1940 /* This will stop us, for example, from wasting time trying to sync on an ID3V1 tag. */
1941 if(FLAC__stream_decoder_get_total_samples(decoder) > 0) {
1942 if(decoder->private_->samples_decoded >= FLAC__stream_decoder_get_total_samples(decoder)) {
1943 decoder->protected_->state = FLAC__STREAM_DECODER_END_OF_STREAM;
1948 /* make sure we're byte aligned */
1949 if(!FLAC__bitreader_is_consumed_byte_aligned(decoder->private_->input)) {
1950 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, FLAC__bitreader_bits_left_for_byte_alignment(decoder->private_->input)))
1951 return false; /* read_callback_ sets the state for us */
1955 if(decoder->private_->cached) {
1956 x = (FLAC__uint32)decoder->private_->lookahead;
1957 decoder->private_->cached = false;
1960 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, 8))
1961 return false; /* read_callback_ sets the state for us */
1963 if(x == 0xff) { /* MAGIC NUMBER for the first 8 frame sync bits */
1964 decoder->private_->header_warmup[0] = (FLAC__byte)x;
1965 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, 8))
1966 return false; /* read_callback_ sets the state for us */
1968 /* 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 */
1969 /* else we have to check if the second byte is the end of a sync code */
1970 if(x == 0xff) { /* MAGIC NUMBER for the first 8 frame sync bits */
1971 decoder->private_->lookahead = (FLAC__byte)x;
1972 decoder->private_->cached = true;
1974 else if(x >> 2 == 0x3e) { /* MAGIC NUMBER for the last 6 sync bits */
1975 decoder->private_->header_warmup[1] = (FLAC__byte)x;
1976 decoder->protected_->state = FLAC__STREAM_DECODER_READ_FRAME;
1981 send_error_to_client_(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC);
1989 FLAC__bool read_frame_(FLAC__StreamDecoder *decoder, FLAC__bool *got_a_frame, FLAC__bool do_full_decode)
1993 FLAC__int32 mid, side;
1994 unsigned frame_crc; /* the one we calculate from the input stream */
1997 *got_a_frame = false;
2001 frame_crc = FLAC__CRC16_UPDATE(decoder->private_->header_warmup[0], frame_crc);
2002 frame_crc = FLAC__CRC16_UPDATE(decoder->private_->header_warmup[1], frame_crc);
2003 FLAC__bitreader_reset_read_crc16(decoder->private_->input, (FLAC__uint16)frame_crc);
2005 if(!read_frame_header_(decoder))
2007 if(decoder->protected_->state == FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC) /* means we didn't sync on a valid header */
2009 if(!allocate_output_(decoder, decoder->private_->frame.header.blocksize, decoder->private_->frame.header.channels))
2011 for(channel = 0; channel < decoder->private_->frame.header.channels; channel++) {
2013 * first figure the correct bits-per-sample of the subframe
2015 unsigned bps = decoder->private_->frame.header.bits_per_sample;
2016 switch(decoder->private_->frame.header.channel_assignment) {
2017 case FLAC__CHANNEL_ASSIGNMENT_INDEPENDENT:
2018 /* no adjustment needed */
2020 case FLAC__CHANNEL_ASSIGNMENT_LEFT_SIDE:
2021 FLAC__ASSERT(decoder->private_->frame.header.channels == 2);
2025 case FLAC__CHANNEL_ASSIGNMENT_RIGHT_SIDE:
2026 FLAC__ASSERT(decoder->private_->frame.header.channels == 2);
2030 case FLAC__CHANNEL_ASSIGNMENT_MID_SIDE:
2031 FLAC__ASSERT(decoder->private_->frame.header.channels == 2);
2041 if(!read_subframe_(decoder, channel, bps, do_full_decode))
2043 if(decoder->protected_->state == FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC) /* means bad sync or got corruption */
2046 if(!read_zero_padding_(decoder))
2048 if(decoder->protected_->state == FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC) /* means bad sync or got corruption (i.e. "zero bits" were not all zeroes) */
2052 * Read the frame CRC-16 from the footer and check
2054 frame_crc = FLAC__bitreader_get_read_crc16(decoder->private_->input);
2055 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, FLAC__FRAME_FOOTER_CRC_LEN))
2056 return false; /* read_callback_ sets the state for us */
2057 if(frame_crc == x) {
2058 if(do_full_decode) {
2059 /* Undo any special channel coding */
2060 switch(decoder->private_->frame.header.channel_assignment) {
2061 case FLAC__CHANNEL_ASSIGNMENT_INDEPENDENT:
2064 case FLAC__CHANNEL_ASSIGNMENT_LEFT_SIDE:
2065 FLAC__ASSERT(decoder->private_->frame.header.channels == 2);
2066 for(i = 0; i < decoder->private_->frame.header.blocksize; i++)
2067 decoder->private_->output[1][i] = decoder->private_->output[0][i] - decoder->private_->output[1][i];
2069 case FLAC__CHANNEL_ASSIGNMENT_RIGHT_SIDE:
2070 FLAC__ASSERT(decoder->private_->frame.header.channels == 2);
2071 for(i = 0; i < decoder->private_->frame.header.blocksize; i++)
2072 decoder->private_->output[0][i] += decoder->private_->output[1][i];
2074 case FLAC__CHANNEL_ASSIGNMENT_MID_SIDE:
2075 FLAC__ASSERT(decoder->private_->frame.header.channels == 2);
2076 for(i = 0; i < decoder->private_->frame.header.blocksize; i++) {
2078 mid = decoder->private_->output[0][i];
2079 side = decoder->private_->output[1][i];
2081 mid |= (side & 1); /* i.e. if 'side' is odd... */
2082 decoder->private_->output[0][i] = (mid + side) >> 1;
2083 decoder->private_->output[1][i] = (mid - side) >> 1;
2085 /* OPT: without 'side' temp variable */
2086 mid = (decoder->private_->output[0][i] << 1) | (decoder->private_->output[1][i] & 1); /* i.e. if 'side' is odd... */
2087 decoder->private_->output[0][i] = (mid + decoder->private_->output[1][i]) >> 1;
2088 decoder->private_->output[1][i] = (mid - decoder->private_->output[1][i]) >> 1;
2099 /* Bad frame, emit error and zero the output signal */
2100 send_error_to_client_(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_FRAME_CRC_MISMATCH);
2101 if(do_full_decode) {
2102 for(channel = 0; channel < decoder->private_->frame.header.channels; channel++) {
2103 memset(decoder->private_->output[channel], 0, sizeof(FLAC__int32) * decoder->private_->frame.header.blocksize);
2108 *got_a_frame = true;
2110 /* we wait to update fixed_block_size until here, when we're sure we've got a proper frame and hence a correct blocksize */
2111 if(decoder->private_->next_fixed_block_size)
2112 decoder->private_->fixed_block_size = decoder->private_->next_fixed_block_size;
2114 /* put the latest values into the public section of the decoder instance */
2115 decoder->protected_->channels = decoder->private_->frame.header.channels;
2116 decoder->protected_->channel_assignment = decoder->private_->frame.header.channel_assignment;
2117 decoder->protected_->bits_per_sample = decoder->private_->frame.header.bits_per_sample;
2118 decoder->protected_->sample_rate = decoder->private_->frame.header.sample_rate;
2119 decoder->protected_->blocksize = decoder->private_->frame.header.blocksize;
2121 FLAC__ASSERT(decoder->private_->frame.header.number_type == FLAC__FRAME_NUMBER_TYPE_SAMPLE_NUMBER);
2122 decoder->private_->samples_decoded = decoder->private_->frame.header.number.sample_number + decoder->private_->frame.header.blocksize;
2125 if(do_full_decode) {
2126 if(write_audio_frame_to_client_(decoder, &decoder->private_->frame, (const FLAC__int32 * const *)decoder->private_->output) != FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE)
2130 decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
2134 FLAC__bool read_frame_header_(FLAC__StreamDecoder *decoder)
2138 unsigned i, blocksize_hint = 0, sample_rate_hint = 0;
2139 FLAC__byte crc8, raw_header[16]; /* MAGIC NUMBER based on the maximum frame header size, including CRC */
2140 unsigned raw_header_len;
2141 FLAC__bool is_unparseable = false;
2143 FLAC__ASSERT(FLAC__bitreader_is_consumed_byte_aligned(decoder->private_->input));
2145 /* init the raw header with the saved bits from synchronization */
2146 raw_header[0] = decoder->private_->header_warmup[0];
2147 raw_header[1] = decoder->private_->header_warmup[1];
2150 /* check to make sure that reserved bit is 0 */
2151 if(raw_header[1] & 0x02) /* MAGIC NUMBER */
2152 is_unparseable = true;
2155 * Note that along the way as we read the header, we look for a sync
2156 * code inside. If we find one it would indicate that our original
2157 * sync was bad since there cannot be a sync code in a valid header.
2159 * Three kinds of things can go wrong when reading the frame header:
2160 * 1) We may have sync'ed incorrectly and not landed on a frame header.
2161 * If we don't find a sync code, it can end up looking like we read
2162 * a valid but unparseable header, until getting to the frame header
2163 * CRC. Even then we could get a false positive on the CRC.
2164 * 2) We may have sync'ed correctly but on an unparseable frame (from a
2166 * 3) We may be on a damaged frame which appears valid but unparseable.
2168 * For all these reasons, we try and read a complete frame header as
2169 * long as it seems valid, even if unparseable, up until the frame
2174 * read in the raw header as bytes so we can CRC it, and parse it on the way
2176 for(i = 0; i < 2; i++) {
2177 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, 8))
2178 return false; /* read_callback_ sets the state for us */
2179 if(x == 0xff) { /* MAGIC NUMBER for the first 8 frame sync bits */
2180 /* if we get here it means our original sync was erroneous since the sync code cannot appear in the header */
2181 decoder->private_->lookahead = (FLAC__byte)x;
2182 decoder->private_->cached = true;
2183 send_error_to_client_(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_BAD_HEADER);
2184 decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
2187 raw_header[raw_header_len++] = (FLAC__byte)x;
2190 switch(x = raw_header[2] >> 4) {
2192 is_unparseable = true;
2195 decoder->private_->frame.header.blocksize = 192;
2201 decoder->private_->frame.header.blocksize = 576 << (x-2);
2215 decoder->private_->frame.header.blocksize = 256 << (x-8);
2222 switch(x = raw_header[2] & 0x0f) {
2224 if(decoder->private_->has_stream_info)
2225 decoder->private_->frame.header.sample_rate = decoder->private_->stream_info.data.stream_info.sample_rate;
2227 is_unparseable = true;
2230 decoder->private_->frame.header.sample_rate = 88200;
2233 decoder->private_->frame.header.sample_rate = 176400;
2236 decoder->private_->frame.header.sample_rate = 192000;
2239 decoder->private_->frame.header.sample_rate = 8000;
2242 decoder->private_->frame.header.sample_rate = 16000;
2245 decoder->private_->frame.header.sample_rate = 22050;
2248 decoder->private_->frame.header.sample_rate = 24000;
2251 decoder->private_->frame.header.sample_rate = 32000;
2254 decoder->private_->frame.header.sample_rate = 44100;
2257 decoder->private_->frame.header.sample_rate = 48000;
2260 decoder->private_->frame.header.sample_rate = 96000;
2265 sample_rate_hint = x;
2268 send_error_to_client_(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_BAD_HEADER);
2269 decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
2275 x = (unsigned)(raw_header[3] >> 4);
2277 decoder->private_->frame.header.channels = 2;
2280 decoder->private_->frame.header.channel_assignment = FLAC__CHANNEL_ASSIGNMENT_LEFT_SIDE;
2283 decoder->private_->frame.header.channel_assignment = FLAC__CHANNEL_ASSIGNMENT_RIGHT_SIDE;
2286 decoder->private_->frame.header.channel_assignment = FLAC__CHANNEL_ASSIGNMENT_MID_SIDE;
2289 is_unparseable = true;
2294 decoder->private_->frame.header.channels = (unsigned)x + 1;
2295 decoder->private_->frame.header.channel_assignment = FLAC__CHANNEL_ASSIGNMENT_INDEPENDENT;
2298 switch(x = (unsigned)(raw_header[3] & 0x0e) >> 1) {
2300 if(decoder->private_->has_stream_info)
2301 decoder->private_->frame.header.bits_per_sample = decoder->private_->stream_info.data.stream_info.bits_per_sample;
2303 is_unparseable = true;
2306 decoder->private_->frame.header.bits_per_sample = 8;
2309 decoder->private_->frame.header.bits_per_sample = 12;
2312 decoder->private_->frame.header.bits_per_sample = 16;
2315 decoder->private_->frame.header.bits_per_sample = 20;
2318 decoder->private_->frame.header.bits_per_sample = 24;
2322 is_unparseable = true;
2329 /* check to make sure that reserved bit is 0 */
2330 if(raw_header[3] & 0x01) /* MAGIC NUMBER */
2331 is_unparseable = true;
2333 /* read the frame's starting sample number (or frame number as the case may be) */
2335 raw_header[1] & 0x01 ||
2336 /*@@@ this clause is a concession to the old way of doing variable blocksize; the only known implementation is flake and can probably be removed without inconveniencing anyone */
2337 (decoder->private_->has_stream_info && decoder->private_->stream_info.data.stream_info.min_blocksize != decoder->private_->stream_info.data.stream_info.max_blocksize)
2338 ) { /* variable blocksize */
2339 if(!FLAC__bitreader_read_utf8_uint64(decoder->private_->input, &xx, raw_header, &raw_header_len))
2340 return false; /* read_callback_ sets the state for us */
2341 if(xx == FLAC__U64L(0xffffffffffffffff)) { /* i.e. non-UTF8 code... */
2342 decoder->private_->lookahead = raw_header[raw_header_len-1]; /* back up as much as we can */
2343 decoder->private_->cached = true;
2344 send_error_to_client_(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_BAD_HEADER);
2345 decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
2348 decoder->private_->frame.header.number_type = FLAC__FRAME_NUMBER_TYPE_SAMPLE_NUMBER;
2349 decoder->private_->frame.header.number.sample_number = xx;
2351 else { /* fixed blocksize */
2352 if(!FLAC__bitreader_read_utf8_uint32(decoder->private_->input, &x, raw_header, &raw_header_len))
2353 return false; /* read_callback_ sets the state for us */
2354 if(x == 0xffffffff) { /* i.e. non-UTF8 code... */
2355 decoder->private_->lookahead = raw_header[raw_header_len-1]; /* back up as much as we can */
2356 decoder->private_->cached = true;
2357 send_error_to_client_(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_BAD_HEADER);
2358 decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
2361 decoder->private_->frame.header.number_type = FLAC__FRAME_NUMBER_TYPE_FRAME_NUMBER;
2362 decoder->private_->frame.header.number.frame_number = x;
2365 if(blocksize_hint) {
2366 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, 8))
2367 return false; /* read_callback_ sets the state for us */
2368 raw_header[raw_header_len++] = (FLAC__byte)x;
2369 if(blocksize_hint == 7) {
2371 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &_x, 8))
2372 return false; /* read_callback_ sets the state for us */
2373 raw_header[raw_header_len++] = (FLAC__byte)_x;
2376 decoder->private_->frame.header.blocksize = x+1;
2379 if(sample_rate_hint) {
2380 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, 8))
2381 return false; /* read_callback_ sets the state for us */
2382 raw_header[raw_header_len++] = (FLAC__byte)x;
2383 if(sample_rate_hint != 12) {
2385 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &_x, 8))
2386 return false; /* read_callback_ sets the state for us */
2387 raw_header[raw_header_len++] = (FLAC__byte)_x;
2390 if(sample_rate_hint == 12)
2391 decoder->private_->frame.header.sample_rate = x*1000;
2392 else if(sample_rate_hint == 13)
2393 decoder->private_->frame.header.sample_rate = x;
2395 decoder->private_->frame.header.sample_rate = x*10;
2398 /* read the CRC-8 byte */
2399 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, 8))
2400 return false; /* read_callback_ sets the state for us */
2401 crc8 = (FLAC__byte)x;
2403 if(FLAC__crc8(raw_header, raw_header_len) != crc8) {
2404 send_error_to_client_(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_BAD_HEADER);
2405 decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
2409 /* calculate the sample number from the frame number if needed */
2410 decoder->private_->next_fixed_block_size = 0;
2411 if(decoder->private_->frame.header.number_type == FLAC__FRAME_NUMBER_TYPE_FRAME_NUMBER) {
2412 x = decoder->private_->frame.header.number.frame_number;
2413 decoder->private_->frame.header.number_type = FLAC__FRAME_NUMBER_TYPE_SAMPLE_NUMBER;
2414 if(decoder->private_->fixed_block_size)
2415 decoder->private_->frame.header.number.sample_number = (FLAC__uint64)decoder->private_->fixed_block_size * (FLAC__uint64)x;
2416 else if(decoder->private_->has_stream_info) {
2417 if(decoder->private_->stream_info.data.stream_info.min_blocksize == decoder->private_->stream_info.data.stream_info.max_blocksize) {
2418 decoder->private_->frame.header.number.sample_number = (FLAC__uint64)decoder->private_->stream_info.data.stream_info.min_blocksize * (FLAC__uint64)x;
2419 decoder->private_->next_fixed_block_size = decoder->private_->stream_info.data.stream_info.max_blocksize;
2422 is_unparseable = true;
2425 decoder->private_->frame.header.number.sample_number = 0;
2426 decoder->private_->next_fixed_block_size = decoder->private_->frame.header.blocksize;
2429 /* can only get here if the stream has invalid frame numbering and no STREAMINFO, so assume it's not the last (possibly short) frame */
2430 decoder->private_->frame.header.number.sample_number = (FLAC__uint64)decoder->private_->frame.header.blocksize * (FLAC__uint64)x;
2434 if(is_unparseable) {
2435 send_error_to_client_(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_UNPARSEABLE_STREAM);
2436 decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
2443 FLAC__bool read_subframe_(FLAC__StreamDecoder *decoder, unsigned channel, unsigned bps, FLAC__bool do_full_decode)
2446 FLAC__bool wasted_bits;
2449 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, 8)) /* MAGIC NUMBER */
2450 return false; /* read_callback_ sets the state for us */
2452 wasted_bits = (x & 1);
2457 if(!FLAC__bitreader_read_unary_unsigned(decoder->private_->input, &u))
2458 return false; /* read_callback_ sets the state for us */
2459 decoder->private_->frame.subframes[channel].wasted_bits = u+1;
2460 bps -= decoder->private_->frame.subframes[channel].wasted_bits;
2463 decoder->private_->frame.subframes[channel].wasted_bits = 0;
2466 * Lots of magic numbers here
2469 send_error_to_client_(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC);
2470 decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
2474 if(!read_subframe_constant_(decoder, channel, bps, do_full_decode))
2478 if(!read_subframe_verbatim_(decoder, channel, bps, do_full_decode))
2482 send_error_to_client_(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_UNPARSEABLE_STREAM);
2483 decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
2487 if(!read_subframe_fixed_(decoder, channel, bps, (x>>1)&7, do_full_decode))
2489 if(decoder->protected_->state == FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC) /* means bad sync or got corruption */
2493 send_error_to_client_(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_UNPARSEABLE_STREAM);
2494 decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
2498 if(!read_subframe_lpc_(decoder, channel, bps, ((x>>1)&31)+1, do_full_decode))
2500 if(decoder->protected_->state == FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC) /* means bad sync or got corruption */
2504 if(wasted_bits && do_full_decode) {
2505 x = decoder->private_->frame.subframes[channel].wasted_bits;
2506 for(i = 0; i < decoder->private_->frame.header.blocksize; i++)
2507 decoder->private_->output[channel][i] <<= x;
2513 FLAC__bool read_subframe_constant_(FLAC__StreamDecoder *decoder, unsigned channel, unsigned bps, FLAC__bool do_full_decode)
2515 FLAC__Subframe_Constant *subframe = &decoder->private_->frame.subframes[channel].data.constant;
2518 FLAC__int32 *output = decoder->private_->output[channel];
2520 decoder->private_->frame.subframes[channel].type = FLAC__SUBFRAME_TYPE_CONSTANT;
2522 if(!FLAC__bitreader_read_raw_int32(decoder->private_->input, &x, bps))
2523 return false; /* read_callback_ sets the state for us */
2525 subframe->value = x;
2527 /* decode the subframe */
2528 if(do_full_decode) {
2529 for(i = 0; i < decoder->private_->frame.header.blocksize; i++)
2536 FLAC__bool read_subframe_fixed_(FLAC__StreamDecoder *decoder, unsigned channel, unsigned bps, const unsigned order, FLAC__bool do_full_decode)
2538 FLAC__Subframe_Fixed *subframe = &decoder->private_->frame.subframes[channel].data.fixed;
2543 decoder->private_->frame.subframes[channel].type = FLAC__SUBFRAME_TYPE_FIXED;
2545 subframe->residual = decoder->private_->residual[channel];
2546 subframe->order = order;
2548 /* read warm-up samples */
2549 for(u = 0; u < order; u++) {
2550 if(!FLAC__bitreader_read_raw_int32(decoder->private_->input, &i32, bps))
2551 return false; /* read_callback_ sets the state for us */
2552 subframe->warmup[u] = i32;
2555 /* read entropy coding method info */
2556 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &u32, FLAC__ENTROPY_CODING_METHOD_TYPE_LEN))
2557 return false; /* read_callback_ sets the state for us */
2558 subframe->entropy_coding_method.type = (FLAC__EntropyCodingMethodType)u32;
2559 switch(subframe->entropy_coding_method.type) {
2560 case FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE:
2561 case FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE2:
2562 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &u32, FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ORDER_LEN))
2563 return false; /* read_callback_ sets the state for us */
2564 subframe->entropy_coding_method.data.partitioned_rice.order = u32;
2565 subframe->entropy_coding_method.data.partitioned_rice.contents = &decoder->private_->partitioned_rice_contents[channel];
2568 send_error_to_client_(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_UNPARSEABLE_STREAM);
2569 decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
2574 switch(subframe->entropy_coding_method.type) {
2575 case FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE:
2576 case FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE2:
2577 if(!read_residual_partitioned_rice_(decoder, order, subframe->entropy_coding_method.data.partitioned_rice.order, &decoder->private_->partitioned_rice_contents[channel], decoder->private_->residual[channel], /*is_extended=*/subframe->entropy_coding_method.type == FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE2))
2584 /* decode the subframe */
2585 if(do_full_decode) {
2586 memcpy(decoder->private_->output[channel], subframe->warmup, sizeof(FLAC__int32) * order);
2587 FLAC__fixed_restore_signal(decoder->private_->residual[channel], decoder->private_->frame.header.blocksize-order, order, decoder->private_->output[channel]+order);
2593 FLAC__bool read_subframe_lpc_(FLAC__StreamDecoder *decoder, unsigned channel, unsigned bps, const unsigned order, FLAC__bool do_full_decode)
2595 FLAC__Subframe_LPC *subframe = &decoder->private_->frame.subframes[channel].data.lpc;
2600 decoder->private_->frame.subframes[channel].type = FLAC__SUBFRAME_TYPE_LPC;
2602 subframe->residual = decoder->private_->residual[channel];
2603 subframe->order = order;
2605 /* read warm-up samples */
2606 for(u = 0; u < order; u++) {
2607 if(!FLAC__bitreader_read_raw_int32(decoder->private_->input, &i32, bps))
2608 return false; /* read_callback_ sets the state for us */
2609 subframe->warmup[u] = i32;
2612 /* read qlp coeff precision */
2613 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &u32, FLAC__SUBFRAME_LPC_QLP_COEFF_PRECISION_LEN))
2614 return false; /* read_callback_ sets the state for us */
2615 if(u32 == (1u << FLAC__SUBFRAME_LPC_QLP_COEFF_PRECISION_LEN) - 1) {
2616 send_error_to_client_(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC);
2617 decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
2620 subframe->qlp_coeff_precision = u32+1;
2622 /* read qlp shift */
2623 if(!FLAC__bitreader_read_raw_int32(decoder->private_->input, &i32, FLAC__SUBFRAME_LPC_QLP_SHIFT_LEN))
2624 return false; /* read_callback_ sets the state for us */
2625 subframe->quantization_level = i32;
2627 /* read quantized lp coefficiencts */
2628 for(u = 0; u < order; u++) {
2629 if(!FLAC__bitreader_read_raw_int32(decoder->private_->input, &i32, subframe->qlp_coeff_precision))
2630 return false; /* read_callback_ sets the state for us */
2631 subframe->qlp_coeff[u] = i32;
2634 /* read entropy coding method info */
2635 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &u32, FLAC__ENTROPY_CODING_METHOD_TYPE_LEN))
2636 return false; /* read_callback_ sets the state for us */
2637 subframe->entropy_coding_method.type = (FLAC__EntropyCodingMethodType)u32;
2638 switch(subframe->entropy_coding_method.type) {
2639 case FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE:
2640 case FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE2:
2641 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &u32, FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ORDER_LEN))
2642 return false; /* read_callback_ sets the state for us */
2643 subframe->entropy_coding_method.data.partitioned_rice.order = u32;
2644 subframe->entropy_coding_method.data.partitioned_rice.contents = &decoder->private_->partitioned_rice_contents[channel];
2647 send_error_to_client_(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_UNPARSEABLE_STREAM);
2648 decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
2653 switch(subframe->entropy_coding_method.type) {
2654 case FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE:
2655 case FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE2:
2656 if(!read_residual_partitioned_rice_(decoder, order, subframe->entropy_coding_method.data.partitioned_rice.order, &decoder->private_->partitioned_rice_contents[channel], decoder->private_->residual[channel], /*is_extended=*/subframe->entropy_coding_method.type == FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE2))
2663 /* decode the subframe */
2664 if(do_full_decode) {
2665 memcpy(decoder->private_->output[channel], subframe->warmup, sizeof(FLAC__int32) * order);
2666 /*@@@@@@ technically not pessimistic enough, should be more like
2667 if( (FLAC__uint64)order * ((((FLAC__uint64)1)<<bps)-1) * ((1<<subframe->qlp_coeff_precision)-1) < (((FLAC__uint64)-1) << 32) )
2669 if(bps + subframe->qlp_coeff_precision + FLAC__bitmath_ilog2(order) <= 32)
2670 if(bps <= 16 && subframe->qlp_coeff_precision <= 16) {
2672 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);
2674 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);
2677 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);
2679 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);
2685 FLAC__bool read_subframe_verbatim_(FLAC__StreamDecoder *decoder, unsigned channel, unsigned bps, FLAC__bool do_full_decode)
2687 FLAC__Subframe_Verbatim *subframe = &decoder->private_->frame.subframes[channel].data.verbatim;
2688 FLAC__int32 x, *residual = decoder->private_->residual[channel];
2691 decoder->private_->frame.subframes[channel].type = FLAC__SUBFRAME_TYPE_VERBATIM;
2693 subframe->data = residual;
2695 for(i = 0; i < decoder->private_->frame.header.blocksize; i++) {
2696 if(!FLAC__bitreader_read_raw_int32(decoder->private_->input, &x, bps))
2697 return false; /* read_callback_ sets the state for us */
2701 /* decode the subframe */
2703 memcpy(decoder->private_->output[channel], subframe->data, sizeof(FLAC__int32) * decoder->private_->frame.header.blocksize);
2708 FLAC__bool read_residual_partitioned_rice_(FLAC__StreamDecoder *decoder, unsigned predictor_order, unsigned partition_order, FLAC__EntropyCodingMethod_PartitionedRiceContents *partitioned_rice_contents, FLAC__int32 *residual, FLAC__bool is_extended)
2710 FLAC__uint32 rice_parameter;
2712 unsigned partition, sample, u;
2713 const unsigned partitions = 1u << partition_order;
2714 const unsigned partition_samples = partition_order > 0? decoder->private_->frame.header.blocksize >> partition_order : decoder->private_->frame.header.blocksize - predictor_order;
2715 const unsigned plen = is_extended? FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE2_PARAMETER_LEN : FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_PARAMETER_LEN;
2716 const unsigned pesc = is_extended? FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE2_ESCAPE_PARAMETER : FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER;
2719 if(partition_order == 0) {
2720 if(decoder->private_->frame.header.blocksize < predictor_order) {
2721 send_error_to_client_(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC);
2722 decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
2727 if(partition_samples < predictor_order) {
2728 send_error_to_client_(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC);
2729 decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
2734 if(!FLAC__format_entropy_coding_method_partitioned_rice_contents_ensure_size(partitioned_rice_contents, max(6, partition_order))) {
2735 decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
2740 for(partition = 0; partition < partitions; partition++) {
2741 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &rice_parameter, plen))
2742 return false; /* read_callback_ sets the state for us */
2743 partitioned_rice_contents->parameters[partition] = rice_parameter;
2744 if(rice_parameter < pesc) {
2745 partitioned_rice_contents->raw_bits[partition] = 0;
2746 u = (partition_order == 0 || partition > 0)? partition_samples : partition_samples - predictor_order;
2747 if(!decoder->private_->local_bitreader_read_rice_signed_block(decoder->private_->input, residual + sample, u, rice_parameter))
2748 return false; /* read_callback_ sets the state for us */
2752 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &rice_parameter, FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_RAW_LEN))
2753 return false; /* read_callback_ sets the state for us */
2754 partitioned_rice_contents->raw_bits[partition] = rice_parameter;
2755 for(u = (partition_order == 0 || partition > 0)? 0 : predictor_order; u < partition_samples; u++, sample++) {
2756 if(!FLAC__bitreader_read_raw_int32(decoder->private_->input, &i, rice_parameter))
2757 return false; /* read_callback_ sets the state for us */
2758 residual[sample] = i;
2766 FLAC__bool read_zero_padding_(FLAC__StreamDecoder *decoder)
2768 if(!FLAC__bitreader_is_consumed_byte_aligned(decoder->private_->input)) {
2769 FLAC__uint32 zero = 0;
2770 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &zero, FLAC__bitreader_bits_left_for_byte_alignment(decoder->private_->input)))
2771 return false; /* read_callback_ sets the state for us */
2773 send_error_to_client_(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC);
2774 decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
2780 FLAC__bool read_callback_(FLAC__byte buffer[], size_t *bytes, void *client_data)
2782 FLAC__StreamDecoder *decoder = (FLAC__StreamDecoder *)client_data;
2786 /* see [1] HACK NOTE below for why we don't call the eof_callback when decoding Ogg FLAC */
2787 !decoder->private_->is_ogg &&
2789 decoder->private_->eof_callback && decoder->private_->eof_callback(decoder, decoder->private_->client_data)
2792 decoder->protected_->state = FLAC__STREAM_DECODER_END_OF_STREAM;
2795 else if(*bytes > 0) {
2796 /* While seeking, it is possible for our seek to land in the
2797 * middle of audio data that looks exactly like a frame header
2798 * from a future version of an encoder. When that happens, our
2799 * error callback will get an
2800 * FLAC__STREAM_DECODER_UNPARSEABLE_STREAM and increment its
2801 * unparseable_frame_count. But there is a remote possibility
2802 * that it is properly synced at such a "future-codec frame",
2803 * so to make sure, we wait to see many "unparseable" errors in
2804 * a row before bailing out.
2806 if(decoder->private_->is_seeking && decoder->private_->unparseable_frame_count > 20) {
2807 decoder->protected_->state = FLAC__STREAM_DECODER_ABORTED;
2811 const FLAC__StreamDecoderReadStatus status =
2813 decoder->private_->is_ogg?
2814 read_callback_ogg_aspect_(decoder, buffer, bytes) :
2816 decoder->private_->read_callback(decoder, buffer, bytes, decoder->private_->client_data)
2818 if(status == FLAC__STREAM_DECODER_READ_STATUS_ABORT) {
2819 decoder->protected_->state = FLAC__STREAM_DECODER_ABORTED;
2822 else if(*bytes == 0) {
2824 status == FLAC__STREAM_DECODER_READ_STATUS_END_OF_STREAM ||
2827 /* see [1] HACK NOTE below for why we don't call the eof_callback when decoding Ogg FLAC */
2828 !decoder->private_->is_ogg &&
2830 decoder->private_->eof_callback && decoder->private_->eof_callback(decoder, decoder->private_->client_data)
2833 decoder->protected_->state = FLAC__STREAM_DECODER_END_OF_STREAM;
2844 /* abort to avoid a deadlock */
2845 decoder->protected_->state = FLAC__STREAM_DECODER_ABORTED;
2848 /* [1] @@@ HACK NOTE: The end-of-stream checking has to be hacked around
2849 * for Ogg FLAC. This is because the ogg decoder aspect can lose sync
2850 * and at the same time hit the end of the stream (for example, seeking
2851 * to a point that is after the beginning of the last Ogg page). There
2852 * is no way to report an Ogg sync loss through the callbacks (see note
2853 * in read_callback_ogg_aspect_()) so it returns CONTINUE with *bytes==0.
2854 * So to keep the decoder from stopping at this point we gate the call
2855 * to the eof_callback and let the Ogg decoder aspect set the
2856 * end-of-stream state when it is needed.
2861 FLAC__StreamDecoderReadStatus read_callback_ogg_aspect_(const FLAC__StreamDecoder *decoder, FLAC__byte buffer[], size_t *bytes)
2863 switch(FLAC__ogg_decoder_aspect_read_callback_wrapper(&decoder->protected_->ogg_decoder_aspect, buffer, bytes, read_callback_proxy_, decoder, decoder->private_->client_data)) {
2864 case FLAC__OGG_DECODER_ASPECT_READ_STATUS_OK:
2865 return FLAC__STREAM_DECODER_READ_STATUS_CONTINUE;
2866 /* we don't really have a way to handle lost sync via read
2867 * callback so we'll let it pass and let the underlying
2868 * FLAC decoder catch the error
2870 case FLAC__OGG_DECODER_ASPECT_READ_STATUS_LOST_SYNC:
2871 return FLAC__STREAM_DECODER_READ_STATUS_CONTINUE;
2872 case FLAC__OGG_DECODER_ASPECT_READ_STATUS_END_OF_STREAM:
2873 return FLAC__STREAM_DECODER_READ_STATUS_END_OF_STREAM;
2874 case FLAC__OGG_DECODER_ASPECT_READ_STATUS_NOT_FLAC:
2875 case FLAC__OGG_DECODER_ASPECT_READ_STATUS_UNSUPPORTED_MAPPING_VERSION:
2876 case FLAC__OGG_DECODER_ASPECT_READ_STATUS_ABORT:
2877 case FLAC__OGG_DECODER_ASPECT_READ_STATUS_ERROR:
2878 case FLAC__OGG_DECODER_ASPECT_READ_STATUS_MEMORY_ALLOCATION_ERROR:
2879 return FLAC__STREAM_DECODER_READ_STATUS_ABORT;
2882 /* double protection */
2883 return FLAC__STREAM_DECODER_READ_STATUS_ABORT;
2887 FLAC__OggDecoderAspectReadStatus read_callback_proxy_(const void *void_decoder, FLAC__byte buffer[], size_t *bytes, void *client_data)
2889 FLAC__StreamDecoder *decoder = (FLAC__StreamDecoder*)void_decoder;
2891 switch(decoder->private_->read_callback(decoder, buffer, bytes, client_data)) {
2892 case FLAC__STREAM_DECODER_READ_STATUS_CONTINUE:
2893 return FLAC__OGG_DECODER_ASPECT_READ_STATUS_OK;
2894 case FLAC__STREAM_DECODER_READ_STATUS_END_OF_STREAM:
2895 return FLAC__OGG_DECODER_ASPECT_READ_STATUS_END_OF_STREAM;
2896 case FLAC__STREAM_DECODER_READ_STATUS_ABORT:
2897 return FLAC__OGG_DECODER_ASPECT_READ_STATUS_ABORT;
2899 /* double protection: */
2901 return FLAC__OGG_DECODER_ASPECT_READ_STATUS_ABORT;
2906 FLAC__StreamDecoderWriteStatus write_audio_frame_to_client_(FLAC__StreamDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 * const buffer[])
2908 if(decoder->private_->is_seeking) {
2909 FLAC__uint64 this_frame_sample = frame->header.number.sample_number;
2910 FLAC__uint64 next_frame_sample = this_frame_sample + (FLAC__uint64)frame->header.blocksize;
2911 FLAC__uint64 target_sample = decoder->private_->target_sample;
2913 FLAC__ASSERT(frame->header.number_type == FLAC__FRAME_NUMBER_TYPE_SAMPLE_NUMBER);
2916 decoder->private_->got_a_frame = true;
2918 decoder->private_->last_frame = *frame; /* save the frame */
2919 if(this_frame_sample <= target_sample && target_sample < next_frame_sample) { /* we hit our target frame */
2920 unsigned delta = (unsigned)(target_sample - this_frame_sample);
2921 /* kick out of seek mode */
2922 decoder->private_->is_seeking = false;
2923 /* shift out the samples before target_sample */
2926 const FLAC__int32 *newbuffer[FLAC__MAX_CHANNELS];
2927 for(channel = 0; channel < frame->header.channels; channel++)
2928 newbuffer[channel] = buffer[channel] + delta;
2929 decoder->private_->last_frame.header.blocksize -= delta;
2930 decoder->private_->last_frame.header.number.sample_number += (FLAC__uint64)delta;
2931 /* write the relevant samples */
2932 return decoder->private_->write_callback(decoder, &decoder->private_->last_frame, newbuffer, decoder->private_->client_data);
2935 /* write the relevant samples */
2936 return decoder->private_->write_callback(decoder, frame, buffer, decoder->private_->client_data);
2940 return FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE;
2945 * If we never got STREAMINFO, turn off MD5 checking to save
2946 * cycles since we don't have a sum to compare to anyway
2948 if(!decoder->private_->has_stream_info)
2949 decoder->private_->do_md5_checking = false;
2950 if(decoder->private_->do_md5_checking) {
2951 if(!FLAC__MD5Accumulate(&decoder->private_->md5context, buffer, frame->header.channels, frame->header.blocksize, (frame->header.bits_per_sample+7) / 8))
2952 return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT;
2954 return decoder->private_->write_callback(decoder, frame, buffer, decoder->private_->client_data);
2958 void send_error_to_client_(const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status)
2960 if(!decoder->private_->is_seeking)
2961 decoder->private_->error_callback(decoder, status, decoder->private_->client_data);
2962 else if(status == FLAC__STREAM_DECODER_ERROR_STATUS_UNPARSEABLE_STREAM)
2963 decoder->private_->unparseable_frame_count++;
2966 FLAC__bool seek_to_absolute_sample_(FLAC__StreamDecoder *decoder, FLAC__uint64 stream_length, FLAC__uint64 target_sample)
2968 FLAC__uint64 first_frame_offset = decoder->private_->first_frame_offset, lower_bound, upper_bound, lower_bound_sample, upper_bound_sample, this_frame_sample;
2969 FLAC__int64 pos = -1;
2971 unsigned approx_bytes_per_frame;
2972 FLAC__bool first_seek = true;
2973 const FLAC__uint64 total_samples = FLAC__stream_decoder_get_total_samples(decoder);
2974 const unsigned min_blocksize = decoder->private_->stream_info.data.stream_info.min_blocksize;
2975 const unsigned max_blocksize = decoder->private_->stream_info.data.stream_info.max_blocksize;
2976 const unsigned max_framesize = decoder->private_->stream_info.data.stream_info.max_framesize;
2977 const unsigned min_framesize = decoder->private_->stream_info.data.stream_info.min_framesize;
2978 /* take these from the current frame in case they've changed mid-stream */
2979 unsigned channels = FLAC__stream_decoder_get_channels(decoder);
2980 unsigned bps = FLAC__stream_decoder_get_bits_per_sample(decoder);
2981 const FLAC__StreamMetadata_SeekTable *seek_table = decoder->private_->has_seek_table? &decoder->private_->seek_table.data.seek_table : 0;
2983 /* use values from stream info if we didn't decode a frame */
2985 channels = decoder->private_->stream_info.data.stream_info.channels;
2987 bps = decoder->private_->stream_info.data.stream_info.bits_per_sample;
2989 /* we are just guessing here */
2990 if(max_framesize > 0)
2991 approx_bytes_per_frame = (max_framesize + min_framesize) / 2 + 1;
2993 * Check if it's a known fixed-blocksize stream. Note that though
2994 * the spec doesn't allow zeroes in the STREAMINFO block, we may
2995 * never get a STREAMINFO block when decoding so the value of
2996 * min_blocksize might be zero.
2998 else if(min_blocksize == max_blocksize && min_blocksize > 0) {
2999 /* note there are no () around 'bps/8' to keep precision up since it's an integer calulation */
3000 approx_bytes_per_frame = min_blocksize * channels * bps/8 + 64;
3003 approx_bytes_per_frame = 4096 * channels * bps/8 + 64;
3006 * First, we set an upper and lower bound on where in the
3007 * stream we will search. For now we assume the worst case
3008 * scenario, which is our best guess at the beginning of
3009 * the first frame and end of the stream.
3011 lower_bound = first_frame_offset;
3012 lower_bound_sample = 0;
3013 upper_bound = stream_length;
3014 upper_bound_sample = total_samples > 0 ? total_samples : target_sample /*estimate it*/;
3017 * Now we refine the bounds if we have a seektable with
3018 * suitable points. Note that according to the spec they
3019 * must be ordered by ascending sample number.
3021 * Note: to protect against invalid seek tables we will ignore points
3022 * that have frame_samples==0 or sample_number>=total_samples
3025 FLAC__uint64 new_lower_bound = lower_bound;
3026 FLAC__uint64 new_upper_bound = upper_bound;
3027 FLAC__uint64 new_lower_bound_sample = lower_bound_sample;
3028 FLAC__uint64 new_upper_bound_sample = upper_bound_sample;
3030 /* find the closest seek point <= target_sample, if it exists */
3031 for(i = (int)seek_table->num_points - 1; i >= 0; i--) {
3033 seek_table->points[i].sample_number != FLAC__STREAM_METADATA_SEEKPOINT_PLACEHOLDER &&
3034 seek_table->points[i].frame_samples > 0 && /* defense against bad seekpoints */
3035 (total_samples <= 0 || seek_table->points[i].sample_number < total_samples) && /* defense against bad seekpoints */
3036 seek_table->points[i].sample_number <= target_sample
3040 if(i >= 0) { /* i.e. we found a suitable seek point... */
3041 new_lower_bound = first_frame_offset + seek_table->points[i].stream_offset;
3042 new_lower_bound_sample = seek_table->points[i].sample_number;
3045 /* find the closest seek point > target_sample, if it exists */
3046 for(i = 0; i < (int)seek_table->num_points; i++) {
3048 seek_table->points[i].sample_number != FLAC__STREAM_METADATA_SEEKPOINT_PLACEHOLDER &&
3049 seek_table->points[i].frame_samples > 0 && /* defense against bad seekpoints */
3050 (total_samples <= 0 || seek_table->points[i].sample_number < total_samples) && /* defense against bad seekpoints */
3051 seek_table->points[i].sample_number > target_sample
3055 if(i < (int)seek_table->num_points) { /* i.e. we found a suitable seek point... */
3056 new_upper_bound = first_frame_offset + seek_table->points[i].stream_offset;
3057 new_upper_bound_sample = seek_table->points[i].sample_number;
3059 /* final protection against unsorted seek tables; keep original values if bogus */
3060 if(new_upper_bound >= new_lower_bound) {
3061 lower_bound = new_lower_bound;
3062 upper_bound = new_upper_bound;
3063 lower_bound_sample = new_lower_bound_sample;
3064 upper_bound_sample = new_upper_bound_sample;
3068 FLAC__ASSERT(upper_bound_sample >= lower_bound_sample);
3069 /* there are 2 insidious ways that the following equality occurs, which
3071 * 1) total_samples is 0 (unknown) and target_sample is 0
3072 * 2) total_samples is 0 (unknown) and target_sample happens to be
3073 * exactly equal to the last seek point in the seek table; this
3074 * means there is no seek point above it, and upper_bound_samples
3075 * remains equal to the estimate (of target_samples) we made above
3076 * in either case it does not hurt to move upper_bound_sample up by 1
3078 if(upper_bound_sample == lower_bound_sample)
3079 upper_bound_sample++;
3081 decoder->private_->target_sample = target_sample;
3083 /* check if the bounds are still ok */
3084 if (lower_bound_sample >= upper_bound_sample || lower_bound > upper_bound) {
3085 decoder->protected_->state = FLAC__STREAM_DECODER_SEEK_ERROR;
3088 #ifndef FLAC__INTEGER_ONLY_LIBRARY
3089 #if defined _MSC_VER || defined __MINGW32__
3090 /* with VC++ you have to spoon feed it the casting */
3091 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;
3093 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;
3096 /* a little less accurate: */
3097 if(upper_bound - lower_bound < 0xffffffff)
3098 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;
3099 else /* @@@ WATCHOUT, ~2TB limit */
3100 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;
3102 if(pos >= (FLAC__int64)upper_bound)
3103 pos = (FLAC__int64)upper_bound - 1;
3104 if(pos < (FLAC__int64)lower_bound)
3105 pos = (FLAC__int64)lower_bound;
3106 if(decoder->private_->seek_callback(decoder, (FLAC__uint64)pos, decoder->private_->client_data) != FLAC__STREAM_DECODER_SEEK_STATUS_OK) {
3107 decoder->protected_->state = FLAC__STREAM_DECODER_SEEK_ERROR;
3110 if(!FLAC__stream_decoder_flush(decoder)) {
3111 /* above call sets the state for us */
3114 /* Now we need to get a frame. First we need to reset our
3115 * unparseable_frame_count; if we get too many unparseable
3116 * frames in a row, the read callback will return
3117 * FLAC__STREAM_DECODER_READ_STATUS_ABORT, causing
3118 * FLAC__stream_decoder_process_single() to return false.
3120 decoder->private_->unparseable_frame_count = 0;
3121 if(!FLAC__stream_decoder_process_single(decoder)) {
3122 decoder->protected_->state = FLAC__STREAM_DECODER_SEEK_ERROR;
3125 /* our write callback will change the state when it gets to the target frame */
3126 /* 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 */
3128 /*@@@@@@ used to be the following; not clear if the check for end of stream is needed anymore */
3129 if(decoder->protected_->state != FLAC__SEEKABLE_STREAM_DECODER_SEEKING && decoder->protected_->state != FLAC__STREAM_DECODER_END_OF_STREAM)
3132 if(!decoder->private_->is_seeking)
3135 FLAC__ASSERT(decoder->private_->last_frame.header.number_type == FLAC__FRAME_NUMBER_TYPE_SAMPLE_NUMBER);
3136 this_frame_sample = decoder->private_->last_frame.header.number.sample_number;
3138 if (0 == decoder->private_->samples_decoded || (this_frame_sample + decoder->private_->last_frame.header.blocksize >= upper_bound_sample && !first_seek)) {
3139 if (pos == (FLAC__int64)lower_bound) {
3140 /* can't move back any more than the first frame, something is fatally wrong */
3141 decoder->protected_->state = FLAC__STREAM_DECODER_SEEK_ERROR;
3144 /* our last move backwards wasn't big enough, try again */
3145 approx_bytes_per_frame = approx_bytes_per_frame? approx_bytes_per_frame * 2 : 16;
3148 /* allow one seek over upper bound, so we can get a correct upper_bound_sample for streams with unknown total_samples */
3151 /* make sure we are not seeking in corrupted stream */
3152 if (this_frame_sample < lower_bound_sample) {
3153 decoder->protected_->state = FLAC__STREAM_DECODER_SEEK_ERROR;
3157 /* we need to narrow the search */
3158 if(target_sample < this_frame_sample) {
3159 upper_bound_sample = this_frame_sample + decoder->private_->last_frame.header.blocksize;
3160 /*@@@@@@ what will decode position be if at end of stream? */
3161 if(!FLAC__stream_decoder_get_decode_position(decoder, &upper_bound)) {
3162 decoder->protected_->state = FLAC__STREAM_DECODER_SEEK_ERROR;
3165 approx_bytes_per_frame = (unsigned)(2 * (upper_bound - pos) / 3 + 16);
3167 else { /* target_sample >= this_frame_sample + this frame's blocksize */
3168 lower_bound_sample = this_frame_sample + decoder->private_->last_frame.header.blocksize;
3169 if(!FLAC__stream_decoder_get_decode_position(decoder, &lower_bound)) {
3170 decoder->protected_->state = FLAC__STREAM_DECODER_SEEK_ERROR;
3173 approx_bytes_per_frame = (unsigned)(2 * (lower_bound - pos) / 3 + 16);
3181 FLAC__bool seek_to_absolute_sample_ogg_(FLAC__StreamDecoder *decoder, FLAC__uint64 stream_length, FLAC__uint64 target_sample)
3183 FLAC__uint64 left_pos = 0, right_pos = stream_length;
3184 FLAC__uint64 left_sample = 0, right_sample = FLAC__stream_decoder_get_total_samples(decoder);
3185 FLAC__uint64 this_frame_sample = 0; /* only initialized to avoid compiler warning */
3186 FLAC__uint64 pos = 0; /* only initialized to avoid compiler warning */
3187 FLAC__bool did_a_seek;
3188 unsigned iteration = 0;
3190 /* In the first iterations, we will calculate the target byte position
3191 * by the distance from the target sample to left_sample and
3192 * right_sample (let's call it "proportional search"). After that, we
3193 * will switch to binary search.
3195 unsigned BINARY_SEARCH_AFTER_ITERATION = 2;
3197 /* We will switch to a linear search once our current sample is less
3198 * than this number of samples ahead of the target sample
3200 static const FLAC__uint64 LINEAR_SEARCH_WITHIN_SAMPLES = FLAC__MAX_BLOCK_SIZE * 2;
3202 /* If the total number of samples is unknown, use a large value, and
3203 * force binary search immediately.
3205 if(right_sample == 0) {
3206 right_sample = (FLAC__uint64)(-1);
3207 BINARY_SEARCH_AFTER_ITERATION = 0;
3210 decoder->private_->target_sample = target_sample;
3211 for( ; ; iteration++) {
3212 if (iteration == 0 || this_frame_sample > target_sample || target_sample - this_frame_sample > LINEAR_SEARCH_WITHIN_SAMPLES) {
3213 if (iteration >= BINARY_SEARCH_AFTER_ITERATION) {
3214 pos = (right_pos + left_pos) / 2;
3217 #ifndef FLAC__INTEGER_ONLY_LIBRARY
3218 #if defined _MSC_VER || defined __MINGW32__
3219 /* with MSVC you have to spoon feed it the casting */
3220 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));
3222 pos = (FLAC__uint64)((FLAC__double)(target_sample - left_sample) / (FLAC__double)(right_sample - left_sample) * (FLAC__double)(right_pos - left_pos));
3225 /* a little less accurate: */
3226 if ((target_sample-left_sample <= 0xffffffff) && (right_pos-left_pos <= 0xffffffff))
3227 pos = (FLAC__int64)(((target_sample-left_sample) * (right_pos-left_pos)) / (right_sample-left_sample));
3228 else /* @@@ WATCHOUT, ~2TB limit */
3229 pos = (FLAC__int64)((((target_sample-left_sample)>>8) * ((right_pos-left_pos)>>8)) / ((right_sample-left_sample)>>16));
3231 /* @@@ TODO: might want to limit pos to some distance
3232 * before EOF, to make sure we land before the last frame,
3233 * thereby getting a this_frame_sample and so having a better
3234 * estimate. @@@@@@DELETE:this would also mostly (or totally if we could
3235 * be sure to land before the last frame) avoid the
3236 * end-of-stream case we have to check later.
3241 if(decoder->private_->seek_callback((FLAC__StreamDecoder*)decoder, (FLAC__uint64)pos, decoder->private_->client_data) != FLAC__STREAM_DECODER_SEEK_STATUS_OK) {
3242 decoder->protected_->state = FLAC__STREAM_DECODER_SEEK_ERROR;
3245 if(!FLAC__stream_decoder_flush(decoder)) {
3246 /* above call sets the state for us */
3254 decoder->private_->got_a_frame = false;
3255 if(!FLAC__stream_decoder_process_single(decoder)) {
3256 decoder->protected_->state = FLAC__STREAM_DECODER_SEEK_ERROR;
3259 if(!decoder->private_->got_a_frame) {
3261 /* this can happen if we seek to a point after the last frame; we drop
3262 * to binary search right away in this case to avoid any wasted
3263 * iterations of proportional search.
3266 BINARY_SEARCH_AFTER_ITERATION = 0;
3269 /* this can probably only happen if total_samples is unknown and the
3270 * target_sample is past the end of the stream
3272 decoder->protected_->state = FLAC__STREAM_DECODER_SEEK_ERROR;
3276 /* our write callback will change the state when it gets to the target frame */
3277 else if(!decoder->private_->is_seeking/*@@@@@@ && decoder->protected_->state != FLAC__STREAM_DECODER_END_OF_STREAM*/) {
3281 this_frame_sample = decoder->private_->last_frame.header.number.sample_number;
3282 FLAC__ASSERT(decoder->private_->last_frame.header.number_type == FLAC__FRAME_NUMBER_TYPE_SAMPLE_NUMBER);
3285 if (this_frame_sample <= target_sample) {
3286 /* The 'equal' case should not happen, since
3287 * FLAC__stream_decoder_process_single()
3288 * should recognize that it has hit the
3289 * target sample and we would exit through
3290 * the 'break' above.
3292 FLAC__ASSERT(this_frame_sample != target_sample);
3294 left_sample = this_frame_sample;
3295 /* sanity check to avoid infinite loop */
3296 if (left_pos == pos) {
3297 decoder->protected_->state = FLAC__STREAM_DECODER_SEEK_ERROR;
3302 else if(this_frame_sample > target_sample) {
3303 right_sample = this_frame_sample;
3304 /* sanity check to avoid infinite loop */
3305 if (right_pos == pos) {
3306 decoder->protected_->state = FLAC__STREAM_DECODER_SEEK_ERROR;
3319 FLAC__StreamDecoderReadStatus file_read_callback_(const FLAC__StreamDecoder *decoder, FLAC__byte buffer[], size_t *bytes, void *client_data)
3324 *bytes = fread(buffer, sizeof(FLAC__byte), *bytes, decoder->private_->file);
3325 if(ferror(decoder->private_->file))
3326 return FLAC__STREAM_DECODER_READ_STATUS_ABORT;
3327 else if(*bytes == 0)
3328 return FLAC__STREAM_DECODER_READ_STATUS_END_OF_STREAM;
3330 return FLAC__STREAM_DECODER_READ_STATUS_CONTINUE;
3333 return FLAC__STREAM_DECODER_READ_STATUS_ABORT; /* abort to avoid a deadlock */
3336 FLAC__StreamDecoderSeekStatus file_seek_callback_(const FLAC__StreamDecoder *decoder, FLAC__uint64 absolute_byte_offset, void *client_data)
3340 if(decoder->private_->file == stdin)
3341 return FLAC__STREAM_DECODER_SEEK_STATUS_UNSUPPORTED;
3342 else if(fseeko(decoder->private_->file, (off_t)absolute_byte_offset, SEEK_SET) < 0)
3343 return FLAC__STREAM_DECODER_SEEK_STATUS_ERROR;
3345 return FLAC__STREAM_DECODER_SEEK_STATUS_OK;
3348 FLAC__StreamDecoderTellStatus file_tell_callback_(const FLAC__StreamDecoder *decoder, FLAC__uint64 *absolute_byte_offset, void *client_data)
3353 if(decoder->private_->file == stdin)
3354 return FLAC__STREAM_DECODER_TELL_STATUS_UNSUPPORTED;
3355 else if((pos = ftello(decoder->private_->file)) < 0)
3356 return FLAC__STREAM_DECODER_TELL_STATUS_ERROR;
3358 *absolute_byte_offset = (FLAC__uint64)pos;
3359 return FLAC__STREAM_DECODER_TELL_STATUS_OK;
3363 FLAC__StreamDecoderLengthStatus file_length_callback_(const FLAC__StreamDecoder *decoder, FLAC__uint64 *stream_length, void *client_data)
3365 struct stat filestats;
3368 if(decoder->private_->file == stdin)
3369 return FLAC__STREAM_DECODER_LENGTH_STATUS_UNSUPPORTED;
3370 else if(fstat(fileno(decoder->private_->file), &filestats) != 0)
3371 return FLAC__STREAM_DECODER_LENGTH_STATUS_ERROR;
3373 *stream_length = (FLAC__uint64)filestats.st_size;
3374 return FLAC__STREAM_DECODER_LENGTH_STATUS_OK;
3378 FLAC__bool file_eof_callback_(const FLAC__StreamDecoder *decoder, void *client_data)
3382 return feof(decoder->private_->file)? true : false;