1 /* libFLAC - Free Lossless Audio Codec library
2 * Copyright (C) 2000,2001,2002,2003,2004,2005,2006 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.
37 #include <stdlib.h> /* for malloc() */
38 #include <string.h> /* for memset/memcpy() */
39 #include "FLAC/assert.h"
40 #include "protected/stream_decoder.h"
41 #include "private/bitbuffer.h"
42 #include "private/bitmath.h"
43 #include "private/cpu.h"
44 #include "private/crc.h"
45 #include "private/fixed.h"
46 #include "private/format.h"
47 #include "private/lpc.h"
48 #include "private/memory.h"
53 #define max(a,b) ((a)>(b)?(a):(b))
55 /* adjust for compilers that can't understand using LLU suffix for uint64_t literals */
57 #define FLAC__U64L(x) x
59 #define FLAC__U64L(x) x##LLU
62 /***********************************************************************
66 ***********************************************************************/
68 static FLAC__byte ID3V2_TAG_[3] = { 'I', 'D', '3' };
70 /***********************************************************************
72 * Private class method prototypes
74 ***********************************************************************/
76 static void set_defaults_(FLAC__StreamDecoder *decoder);
77 static FLAC__bool allocate_output_(FLAC__StreamDecoder *decoder, unsigned size, unsigned channels);
78 static FLAC__bool has_id_filtered_(FLAC__StreamDecoder *decoder, FLAC__byte *id);
79 static FLAC__bool find_metadata_(FLAC__StreamDecoder *decoder);
80 static FLAC__bool read_metadata_(FLAC__StreamDecoder *decoder);
81 static FLAC__bool read_metadata_streaminfo_(FLAC__StreamDecoder *decoder, FLAC__bool is_last, unsigned length);
82 static FLAC__bool read_metadata_seektable_(FLAC__StreamDecoder *decoder, FLAC__bool is_last, unsigned length);
83 static FLAC__bool read_metadata_vorbiscomment_(FLAC__StreamDecoder *decoder, FLAC__StreamMetadata_VorbisComment *obj);
84 static FLAC__bool read_metadata_cuesheet_(FLAC__StreamDecoder *decoder, FLAC__StreamMetadata_CueSheet *obj);
85 static FLAC__bool skip_id3v2_tag_(FLAC__StreamDecoder *decoder);
86 static FLAC__bool frame_sync_(FLAC__StreamDecoder *decoder);
87 static FLAC__bool read_frame_(FLAC__StreamDecoder *decoder, FLAC__bool *got_a_frame, FLAC__bool do_full_decode);
88 static FLAC__bool read_frame_header_(FLAC__StreamDecoder *decoder);
89 static FLAC__bool read_subframe_(FLAC__StreamDecoder *decoder, unsigned channel, unsigned bps, FLAC__bool do_full_decode);
90 static FLAC__bool read_subframe_constant_(FLAC__StreamDecoder *decoder, unsigned channel, unsigned bps, FLAC__bool do_full_decode);
91 static FLAC__bool read_subframe_fixed_(FLAC__StreamDecoder *decoder, unsigned channel, unsigned bps, const unsigned order, FLAC__bool do_full_decode);
92 static FLAC__bool read_subframe_lpc_(FLAC__StreamDecoder *decoder, unsigned channel, unsigned bps, const unsigned order, FLAC__bool do_full_decode);
93 static FLAC__bool read_subframe_verbatim_(FLAC__StreamDecoder *decoder, unsigned channel, unsigned bps, FLAC__bool do_full_decode);
94 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);
95 static FLAC__bool read_zero_padding_(FLAC__StreamDecoder *decoder);
96 static FLAC__bool read_callback_(FLAC__byte buffer[], unsigned *bytes, void *client_data);
98 /***********************************************************************
102 ***********************************************************************/
104 typedef struct FLAC__StreamDecoderPrivate {
105 FLAC__StreamDecoderReadCallback read_callback;
106 FLAC__StreamDecoderWriteCallback write_callback;
107 FLAC__StreamDecoderMetadataCallback metadata_callback;
108 FLAC__StreamDecoderErrorCallback error_callback;
109 /* generic 32-bit datapath: */
110 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[]);
111 /* generic 64-bit datapath: */
112 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[]);
113 /* for use when the signal is <= 16 bits-per-sample, or <= 15 bits-per-sample on a side channel (which requires 1 extra bit): */
114 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[]);
115 /* 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: */
116 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[]);
118 FLAC__BitBuffer *input;
119 FLAC__int32 *output[FLAC__MAX_CHANNELS];
120 FLAC__int32 *residual[FLAC__MAX_CHANNELS]; /* WATCHOUT: these are the aligned pointers; the real pointers that should be free()'d are residual_unaligned[] below */
121 FLAC__EntropyCodingMethod_PartitionedRiceContents partitioned_rice_contents[FLAC__MAX_CHANNELS];
122 unsigned output_capacity, output_channels;
123 FLAC__uint32 last_frame_number;
124 FLAC__uint32 last_block_size;
125 FLAC__uint64 samples_decoded;
126 FLAC__bool has_stream_info, has_seek_table;
127 FLAC__StreamMetadata stream_info;
128 FLAC__StreamMetadata seek_table;
129 FLAC__bool metadata_filter[128]; /* MAGIC number 128 == total number of metadata block types == 1 << 7 */
130 FLAC__byte *metadata_filter_ids;
131 unsigned metadata_filter_ids_count, metadata_filter_ids_capacity; /* units for both are IDs, not bytes */
133 FLAC__bool cached; /* true if there is a byte in lookahead */
134 FLAC__CPUInfo cpuinfo;
135 FLAC__byte header_warmup[2]; /* contains the sync code and reserved bits */
136 FLAC__byte lookahead; /* temp storage when we need to look ahead one byte in the stream */
137 /* unaligned (original) pointers to allocated data */
138 FLAC__int32 *residual_unaligned[FLAC__MAX_CHANNELS];
139 } FLAC__StreamDecoderPrivate;
141 /***********************************************************************
143 * Public static class data
145 ***********************************************************************/
147 FLAC_API const char * const FLAC__StreamDecoderStateString[] = {
148 "FLAC__STREAM_DECODER_SEARCH_FOR_METADATA",
149 "FLAC__STREAM_DECODER_READ_METADATA",
150 "FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC",
151 "FLAC__STREAM_DECODER_READ_FRAME",
152 "FLAC__STREAM_DECODER_END_OF_STREAM",
153 "FLAC__STREAM_DECODER_ABORTED",
154 "FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR",
155 "FLAC__STREAM_DECODER_ALREADY_INITIALIZED",
156 "FLAC__STREAM_DECODER_INVALID_CALLBACK",
157 "FLAC__STREAM_DECODER_UNINITIALIZED"
160 FLAC_API const char * const FLAC__StreamDecoderReadStatusString[] = {
161 "FLAC__STREAM_DECODER_READ_STATUS_CONTINUE",
162 "FLAC__STREAM_DECODER_READ_STATUS_END_OF_STREAM",
163 "FLAC__STREAM_DECODER_READ_STATUS_ABORT"
166 FLAC_API const char * const FLAC__StreamDecoderWriteStatusString[] = {
167 "FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE",
168 "FLAC__STREAM_DECODER_WRITE_STATUS_ABORT"
171 FLAC_API const char * const FLAC__StreamDecoderErrorStatusString[] = {
172 "FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC",
173 "FLAC__STREAM_DECODER_ERROR_STATUS_BAD_HEADER",
174 "FLAC__STREAM_DECODER_ERROR_STATUS_FRAME_CRC_MISMATCH",
175 "FLAC__STREAM_DECODER_ERROR_STATUS_UNPARSEABLE_STREAM"
178 /***********************************************************************
180 * Class constructor/destructor
182 ***********************************************************************/
183 FLAC_API FLAC__StreamDecoder *FLAC__stream_decoder_new()
185 FLAC__StreamDecoder *decoder;
188 FLAC__ASSERT(sizeof(int) >= 4); /* we want to die right away if this is not true */
190 decoder = (FLAC__StreamDecoder*)calloc(1, sizeof(FLAC__StreamDecoder));
195 decoder->protected_ = (FLAC__StreamDecoderProtected*)calloc(1, sizeof(FLAC__StreamDecoderProtected));
196 if(decoder->protected_ == 0) {
201 decoder->private_ = (FLAC__StreamDecoderPrivate*)calloc(1, sizeof(FLAC__StreamDecoderPrivate));
202 if(decoder->private_ == 0) {
203 free(decoder->protected_);
208 decoder->private_->input = FLAC__bitbuffer_new();
209 if(decoder->private_->input == 0) {
210 free(decoder->private_);
211 free(decoder->protected_);
216 decoder->private_->metadata_filter_ids_capacity = 16;
217 if(0 == (decoder->private_->metadata_filter_ids = (FLAC__byte*)malloc((FLAC__STREAM_METADATA_APPLICATION_ID_LEN/8) * decoder->private_->metadata_filter_ids_capacity))) {
218 FLAC__bitbuffer_delete(decoder->private_->input);
219 free(decoder->private_);
220 free(decoder->protected_);
225 for(i = 0; i < FLAC__MAX_CHANNELS; i++) {
226 decoder->private_->output[i] = 0;
227 decoder->private_->residual_unaligned[i] = decoder->private_->residual[i] = 0;
230 decoder->private_->output_capacity = 0;
231 decoder->private_->output_channels = 0;
232 decoder->private_->has_seek_table = false;
234 for(i = 0; i < FLAC__MAX_CHANNELS; i++)
235 FLAC__format_entropy_coding_method_partitioned_rice_contents_init(&decoder->private_->partitioned_rice_contents[i]);
237 set_defaults_(decoder);
239 decoder->protected_->state = FLAC__STREAM_DECODER_UNINITIALIZED;
244 FLAC_API void FLAC__stream_decoder_delete(FLAC__StreamDecoder *decoder)
248 FLAC__ASSERT(0 != decoder);
249 FLAC__ASSERT(0 != decoder->protected_);
250 FLAC__ASSERT(0 != decoder->private_);
251 FLAC__ASSERT(0 != decoder->private_->input);
253 FLAC__stream_decoder_finish(decoder);
255 if(0 != decoder->private_->metadata_filter_ids)
256 free(decoder->private_->metadata_filter_ids);
258 FLAC__bitbuffer_delete(decoder->private_->input);
260 for(i = 0; i < FLAC__MAX_CHANNELS; i++)
261 FLAC__format_entropy_coding_method_partitioned_rice_contents_clear(&decoder->private_->partitioned_rice_contents[i]);
263 free(decoder->private_);
264 free(decoder->protected_);
268 /***********************************************************************
270 * Public class methods
272 ***********************************************************************/
274 FLAC_API FLAC__StreamDecoderState FLAC__stream_decoder_init(FLAC__StreamDecoder *decoder)
276 FLAC__ASSERT(0 != decoder);
278 if(decoder->protected_->state != FLAC__STREAM_DECODER_UNINITIALIZED)
279 return decoder->protected_->state = FLAC__STREAM_DECODER_ALREADY_INITIALIZED;
281 if(0 == decoder->private_->read_callback || 0 == decoder->private_->write_callback || 0 == decoder->private_->metadata_callback || 0 == decoder->private_->error_callback)
282 return decoder->protected_->state = FLAC__STREAM_DECODER_INVALID_CALLBACK;
284 if(!FLAC__bitbuffer_init(decoder->private_->input))
285 return decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
287 decoder->private_->last_frame_number = 0;
288 decoder->private_->last_block_size = 0;
289 decoder->private_->samples_decoded = 0;
290 decoder->private_->has_stream_info = false;
291 decoder->private_->cached = false;
294 * get the CPU info and set the function pointers
296 FLAC__cpu_info(&decoder->private_->cpuinfo);
297 /* first default to the non-asm routines */
298 decoder->private_->local_lpc_restore_signal = FLAC__lpc_restore_signal;
299 decoder->private_->local_lpc_restore_signal_64bit = FLAC__lpc_restore_signal_wide;
300 decoder->private_->local_lpc_restore_signal_16bit = FLAC__lpc_restore_signal;
301 decoder->private_->local_lpc_restore_signal_16bit_order8 = FLAC__lpc_restore_signal;
302 /* now override with asm where appropriate */
304 if(decoder->private_->cpuinfo.use_asm) {
305 #ifdef FLAC__CPU_IA32
306 FLAC__ASSERT(decoder->private_->cpuinfo.type == FLAC__CPUINFO_TYPE_IA32);
307 #ifdef FLAC__HAS_NASM
308 if(decoder->private_->cpuinfo.data.ia32.mmx) {
309 decoder->private_->local_lpc_restore_signal = FLAC__lpc_restore_signal_asm_ia32;
310 decoder->private_->local_lpc_restore_signal_16bit = FLAC__lpc_restore_signal_asm_ia32_mmx;
311 decoder->private_->local_lpc_restore_signal_16bit_order8 = FLAC__lpc_restore_signal_asm_ia32_mmx;
314 decoder->private_->local_lpc_restore_signal = FLAC__lpc_restore_signal_asm_ia32;
315 decoder->private_->local_lpc_restore_signal_16bit = FLAC__lpc_restore_signal_asm_ia32;
316 decoder->private_->local_lpc_restore_signal_16bit_order8 = FLAC__lpc_restore_signal_asm_ia32;
319 #elif defined FLAC__CPU_PPC
320 FLAC__ASSERT(decoder->private_->cpuinfo.type == FLAC__CPUINFO_TYPE_PPC);
321 if(decoder->private_->cpuinfo.data.ppc.altivec) {
322 decoder->private_->local_lpc_restore_signal_16bit = FLAC__lpc_restore_signal_asm_ppc_altivec_16;
323 decoder->private_->local_lpc_restore_signal_16bit_order8 = FLAC__lpc_restore_signal_asm_ppc_altivec_16_order8;
329 if(!FLAC__stream_decoder_reset(decoder))
330 return decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
332 return decoder->protected_->state;
335 FLAC_API void FLAC__stream_decoder_finish(FLAC__StreamDecoder *decoder)
338 FLAC__ASSERT(0 != decoder);
339 if(decoder->protected_->state == FLAC__STREAM_DECODER_UNINITIALIZED)
341 if(0 != decoder->private_->seek_table.data.seek_table.points) {
342 free(decoder->private_->seek_table.data.seek_table.points);
343 decoder->private_->seek_table.data.seek_table.points = 0;
344 decoder->private_->has_seek_table = false;
346 FLAC__bitbuffer_free(decoder->private_->input);
347 for(i = 0; i < FLAC__MAX_CHANNELS; i++) {
349 * FLAC__lpc_restore_signal_asm_ia32_mmx() requires that the
350 * output arrays have a buffer of up to 3 zeroes in front
351 * (at negative indices) for alignment purposes; we use 4
352 * to keep the data well-aligned.
354 if(0 != decoder->private_->output[i]) {
355 free(decoder->private_->output[i]-4);
356 decoder->private_->output[i] = 0;
358 if(0 != decoder->private_->residual_unaligned[i]) {
359 free(decoder->private_->residual_unaligned[i]);
360 decoder->private_->residual_unaligned[i] = decoder->private_->residual[i] = 0;
363 decoder->private_->output_capacity = 0;
364 decoder->private_->output_channels = 0;
366 set_defaults_(decoder);
368 decoder->protected_->state = FLAC__STREAM_DECODER_UNINITIALIZED;
371 FLAC_API FLAC__bool FLAC__stream_decoder_set_read_callback(FLAC__StreamDecoder *decoder, FLAC__StreamDecoderReadCallback value)
373 FLAC__ASSERT(0 != decoder);
374 FLAC__ASSERT(0 != decoder->private_);
375 FLAC__ASSERT(0 != decoder->protected_);
376 if(decoder->protected_->state != FLAC__STREAM_DECODER_UNINITIALIZED)
378 decoder->private_->read_callback = value;
382 FLAC_API FLAC__bool FLAC__stream_decoder_set_write_callback(FLAC__StreamDecoder *decoder, FLAC__StreamDecoderWriteCallback value)
384 FLAC__ASSERT(0 != decoder);
385 FLAC__ASSERT(0 != decoder->private_);
386 FLAC__ASSERT(0 != decoder->protected_);
387 if(decoder->protected_->state != FLAC__STREAM_DECODER_UNINITIALIZED)
389 decoder->private_->write_callback = value;
393 FLAC_API FLAC__bool FLAC__stream_decoder_set_metadata_callback(FLAC__StreamDecoder *decoder, FLAC__StreamDecoderMetadataCallback value)
395 FLAC__ASSERT(0 != decoder);
396 FLAC__ASSERT(0 != decoder->private_);
397 FLAC__ASSERT(0 != decoder->protected_);
398 if(decoder->protected_->state != FLAC__STREAM_DECODER_UNINITIALIZED)
400 decoder->private_->metadata_callback = value;
404 FLAC_API FLAC__bool FLAC__stream_decoder_set_error_callback(FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorCallback value)
406 FLAC__ASSERT(0 != decoder);
407 FLAC__ASSERT(0 != decoder->private_);
408 FLAC__ASSERT(0 != decoder->protected_);
409 if(decoder->protected_->state != FLAC__STREAM_DECODER_UNINITIALIZED)
411 decoder->private_->error_callback = value;
415 FLAC_API FLAC__bool FLAC__stream_decoder_set_client_data(FLAC__StreamDecoder *decoder, void *value)
417 FLAC__ASSERT(0 != decoder);
418 FLAC__ASSERT(0 != decoder->private_);
419 FLAC__ASSERT(0 != decoder->protected_);
420 if(decoder->protected_->state != FLAC__STREAM_DECODER_UNINITIALIZED)
422 decoder->private_->client_data = value;
426 FLAC_API FLAC__bool FLAC__stream_decoder_set_metadata_respond(FLAC__StreamDecoder *decoder, FLAC__MetadataType type)
428 FLAC__ASSERT(0 != decoder);
429 FLAC__ASSERT(0 != decoder->private_);
430 FLAC__ASSERT(0 != decoder->protected_);
431 FLAC__ASSERT((unsigned)type <= FLAC__MAX_METADATA_TYPE_CODE);
432 /* double protection */
433 if((unsigned)type > FLAC__MAX_METADATA_TYPE_CODE)
435 if(decoder->protected_->state != FLAC__STREAM_DECODER_UNINITIALIZED)
437 decoder->private_->metadata_filter[type] = true;
438 if(type == FLAC__METADATA_TYPE_APPLICATION)
439 decoder->private_->metadata_filter_ids_count = 0;
443 FLAC_API FLAC__bool FLAC__stream_decoder_set_metadata_respond_application(FLAC__StreamDecoder *decoder, const FLAC__byte id[4])
445 FLAC__ASSERT(0 != decoder);
446 FLAC__ASSERT(0 != decoder->private_);
447 FLAC__ASSERT(0 != decoder->protected_);
448 FLAC__ASSERT(0 != id);
449 if(decoder->protected_->state != FLAC__STREAM_DECODER_UNINITIALIZED)
452 if(decoder->private_->metadata_filter[FLAC__METADATA_TYPE_APPLICATION])
455 FLAC__ASSERT(0 != decoder->private_->metadata_filter_ids);
457 if(decoder->private_->metadata_filter_ids_count == decoder->private_->metadata_filter_ids_capacity) {
458 if(0 == (decoder->private_->metadata_filter_ids = (FLAC__byte*)realloc(decoder->private_->metadata_filter_ids, decoder->private_->metadata_filter_ids_capacity * 2))) {
459 decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
462 decoder->private_->metadata_filter_ids_capacity *= 2;
465 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));
466 decoder->private_->metadata_filter_ids_count++;
471 FLAC_API FLAC__bool FLAC__stream_decoder_set_metadata_respond_all(FLAC__StreamDecoder *decoder)
474 FLAC__ASSERT(0 != decoder);
475 FLAC__ASSERT(0 != decoder->private_);
476 FLAC__ASSERT(0 != decoder->protected_);
477 if(decoder->protected_->state != FLAC__STREAM_DECODER_UNINITIALIZED)
479 for(i = 0; i < sizeof(decoder->private_->metadata_filter) / sizeof(decoder->private_->metadata_filter[0]); i++)
480 decoder->private_->metadata_filter[i] = true;
481 decoder->private_->metadata_filter_ids_count = 0;
485 FLAC_API FLAC__bool FLAC__stream_decoder_set_metadata_ignore(FLAC__StreamDecoder *decoder, FLAC__MetadataType type)
487 FLAC__ASSERT(0 != decoder);
488 FLAC__ASSERT(0 != decoder->private_);
489 FLAC__ASSERT(0 != decoder->protected_);
490 FLAC__ASSERT((unsigned)type <= FLAC__MAX_METADATA_TYPE_CODE);
491 /* double protection */
492 if((unsigned)type > FLAC__MAX_METADATA_TYPE_CODE)
494 if(decoder->protected_->state != FLAC__STREAM_DECODER_UNINITIALIZED)
496 decoder->private_->metadata_filter[type] = false;
497 if(type == FLAC__METADATA_TYPE_APPLICATION)
498 decoder->private_->metadata_filter_ids_count = 0;
502 FLAC_API FLAC__bool FLAC__stream_decoder_set_metadata_ignore_application(FLAC__StreamDecoder *decoder, const FLAC__byte id[4])
504 FLAC__ASSERT(0 != decoder);
505 FLAC__ASSERT(0 != decoder->private_);
506 FLAC__ASSERT(0 != decoder->protected_);
507 FLAC__ASSERT(0 != id);
508 if(decoder->protected_->state != FLAC__STREAM_DECODER_UNINITIALIZED)
511 if(!decoder->private_->metadata_filter[FLAC__METADATA_TYPE_APPLICATION])
514 FLAC__ASSERT(0 != decoder->private_->metadata_filter_ids);
516 if(decoder->private_->metadata_filter_ids_count == decoder->private_->metadata_filter_ids_capacity) {
517 if(0 == (decoder->private_->metadata_filter_ids = (FLAC__byte*)realloc(decoder->private_->metadata_filter_ids, decoder->private_->metadata_filter_ids_capacity * 2))) {
518 decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
521 decoder->private_->metadata_filter_ids_capacity *= 2;
524 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));
525 decoder->private_->metadata_filter_ids_count++;
530 FLAC_API FLAC__bool FLAC__stream_decoder_set_metadata_ignore_all(FLAC__StreamDecoder *decoder)
532 FLAC__ASSERT(0 != decoder);
533 FLAC__ASSERT(0 != decoder->private_);
534 FLAC__ASSERT(0 != decoder->protected_);
535 if(decoder->protected_->state != FLAC__STREAM_DECODER_UNINITIALIZED)
537 memset(decoder->private_->metadata_filter, 0, sizeof(decoder->private_->metadata_filter));
538 decoder->private_->metadata_filter_ids_count = 0;
542 FLAC_API FLAC__StreamDecoderState FLAC__stream_decoder_get_state(const FLAC__StreamDecoder *decoder)
544 FLAC__ASSERT(0 != decoder);
545 FLAC__ASSERT(0 != decoder->protected_);
546 return decoder->protected_->state;
549 FLAC_API const char *FLAC__stream_decoder_get_resolved_state_string(const FLAC__StreamDecoder *decoder)
551 return FLAC__StreamDecoderStateString[decoder->protected_->state];
554 FLAC_API unsigned FLAC__stream_decoder_get_channels(const FLAC__StreamDecoder *decoder)
556 FLAC__ASSERT(0 != decoder);
557 FLAC__ASSERT(0 != decoder->protected_);
558 return decoder->protected_->channels;
561 FLAC_API FLAC__ChannelAssignment FLAC__stream_decoder_get_channel_assignment(const FLAC__StreamDecoder *decoder)
563 FLAC__ASSERT(0 != decoder);
564 FLAC__ASSERT(0 != decoder->protected_);
565 return decoder->protected_->channel_assignment;
568 FLAC_API unsigned FLAC__stream_decoder_get_bits_per_sample(const FLAC__StreamDecoder *decoder)
570 FLAC__ASSERT(0 != decoder);
571 FLAC__ASSERT(0 != decoder->protected_);
572 return decoder->protected_->bits_per_sample;
575 FLAC_API unsigned FLAC__stream_decoder_get_sample_rate(const FLAC__StreamDecoder *decoder)
577 FLAC__ASSERT(0 != decoder);
578 FLAC__ASSERT(0 != decoder->protected_);
579 return decoder->protected_->sample_rate;
582 FLAC_API unsigned FLAC__stream_decoder_get_blocksize(const FLAC__StreamDecoder *decoder)
584 FLAC__ASSERT(0 != decoder);
585 FLAC__ASSERT(0 != decoder->protected_);
586 return decoder->protected_->blocksize;
589 FLAC_API FLAC__bool FLAC__stream_decoder_flush(FLAC__StreamDecoder *decoder)
591 FLAC__ASSERT(0 != decoder);
592 FLAC__ASSERT(0 != decoder->private_);
593 FLAC__ASSERT(0 != decoder->protected_);
595 if(!FLAC__bitbuffer_clear(decoder->private_->input)) {
596 decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
599 decoder->private_->last_frame_number = 0;
600 decoder->private_->last_block_size = 0;
601 decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
606 FLAC_API FLAC__bool FLAC__stream_decoder_reset(FLAC__StreamDecoder *decoder)
608 FLAC__ASSERT(0 != decoder);
609 FLAC__ASSERT(0 != decoder->private_);
610 FLAC__ASSERT(0 != decoder->protected_);
612 if(!FLAC__stream_decoder_flush(decoder)) {
613 decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
616 decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_METADATA;
618 decoder->private_->samples_decoded = 0;
623 FLAC_API FLAC__bool FLAC__stream_decoder_process_single(FLAC__StreamDecoder *decoder)
625 FLAC__bool got_a_frame;
626 FLAC__ASSERT(0 != decoder);
627 FLAC__ASSERT(0 != decoder->protected_);
630 switch(decoder->protected_->state) {
631 case FLAC__STREAM_DECODER_SEARCH_FOR_METADATA:
632 if(!find_metadata_(decoder))
633 return false; /* above function sets the status for us */
635 case FLAC__STREAM_DECODER_READ_METADATA:
636 if(!read_metadata_(decoder))
637 return false; /* above function sets the status for us */
640 case FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC:
641 if(!frame_sync_(decoder))
642 return true; /* above function sets the status for us */
644 case FLAC__STREAM_DECODER_READ_FRAME:
645 if(!read_frame_(decoder, &got_a_frame, /*do_full_decode=*/true))
646 return false; /* above function sets the status for us */
648 return true; /* above function sets the status for us */
650 case FLAC__STREAM_DECODER_END_OF_STREAM:
651 case FLAC__STREAM_DECODER_ABORTED:
660 FLAC_API FLAC__bool FLAC__stream_decoder_process_until_end_of_metadata(FLAC__StreamDecoder *decoder)
662 FLAC__ASSERT(0 != decoder);
663 FLAC__ASSERT(0 != decoder->protected_);
666 switch(decoder->protected_->state) {
667 case FLAC__STREAM_DECODER_SEARCH_FOR_METADATA:
668 if(!find_metadata_(decoder))
669 return false; /* above function sets the status for us */
671 case FLAC__STREAM_DECODER_READ_METADATA:
672 if(!read_metadata_(decoder))
673 return false; /* above function sets the status for us */
675 case FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC:
676 case FLAC__STREAM_DECODER_READ_FRAME:
677 case FLAC__STREAM_DECODER_END_OF_STREAM:
678 case FLAC__STREAM_DECODER_ABORTED:
687 FLAC_API FLAC__bool FLAC__stream_decoder_process_until_end_of_stream(FLAC__StreamDecoder *decoder)
690 FLAC__ASSERT(0 != decoder);
691 FLAC__ASSERT(0 != decoder->protected_);
694 switch(decoder->protected_->state) {
695 case FLAC__STREAM_DECODER_SEARCH_FOR_METADATA:
696 if(!find_metadata_(decoder))
697 return false; /* above function sets the status for us */
699 case FLAC__STREAM_DECODER_READ_METADATA:
700 if(!read_metadata_(decoder))
701 return false; /* above function sets the status for us */
703 case FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC:
704 if(!frame_sync_(decoder))
705 return true; /* above function sets the status for us */
707 case FLAC__STREAM_DECODER_READ_FRAME:
708 if(!read_frame_(decoder, &dummy, /*do_full_decode=*/true))
709 return false; /* above function sets the status for us */
711 case FLAC__STREAM_DECODER_END_OF_STREAM:
712 case FLAC__STREAM_DECODER_ABORTED:
721 FLAC_API FLAC__bool FLAC__stream_decoder_skip_single_frame(FLAC__StreamDecoder *decoder)
723 FLAC__bool got_a_frame;
724 FLAC__ASSERT(0 != decoder);
725 FLAC__ASSERT(0 != decoder->protected_);
728 switch(decoder->protected_->state) {
729 case FLAC__STREAM_DECODER_SEARCH_FOR_METADATA:
730 case FLAC__STREAM_DECODER_READ_METADATA:
731 return false; /* above function sets the status for us */
732 case FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC:
733 if(!frame_sync_(decoder))
734 return true; /* above function sets the status for us */
736 case FLAC__STREAM_DECODER_READ_FRAME:
737 if(!read_frame_(decoder, &got_a_frame, /*do_full_decode=*/false))
738 return false; /* above function sets the status for us */
740 return true; /* above function sets the status for us */
742 case FLAC__STREAM_DECODER_END_OF_STREAM:
743 case FLAC__STREAM_DECODER_ABORTED:
752 /***********************************************************************
754 * Protected class methods
756 ***********************************************************************/
758 unsigned FLAC__stream_decoder_get_input_bytes_unconsumed(const FLAC__StreamDecoder *decoder)
760 FLAC__ASSERT(0 != decoder);
761 return FLAC__bitbuffer_get_input_bytes_unconsumed(decoder->private_->input);
764 /***********************************************************************
766 * Private class methods
768 ***********************************************************************/
770 void set_defaults_(FLAC__StreamDecoder *decoder)
772 decoder->private_->read_callback = 0;
773 decoder->private_->write_callback = 0;
774 decoder->private_->metadata_callback = 0;
775 decoder->private_->error_callback = 0;
776 decoder->private_->client_data = 0;
778 memset(decoder->private_->metadata_filter, 0, sizeof(decoder->private_->metadata_filter));
779 decoder->private_->metadata_filter[FLAC__METADATA_TYPE_STREAMINFO] = true;
780 decoder->private_->metadata_filter_ids_count = 0;
783 FLAC__bool allocate_output_(FLAC__StreamDecoder *decoder, unsigned size, unsigned channels)
788 if(size <= decoder->private_->output_capacity && channels <= decoder->private_->output_channels)
791 /* simply using realloc() is not practical because the number of channels may change mid-stream */
793 for(i = 0; i < FLAC__MAX_CHANNELS; i++) {
794 if(0 != decoder->private_->output[i]) {
795 free(decoder->private_->output[i]-4);
796 decoder->private_->output[i] = 0;
798 if(0 != decoder->private_->residual_unaligned[i]) {
799 free(decoder->private_->residual_unaligned[i]);
800 decoder->private_->residual_unaligned[i] = decoder->private_->residual[i] = 0;
804 for(i = 0; i < channels; i++) {
806 * FLAC__lpc_restore_signal_asm_ia32_mmx() requires that the
807 * output arrays have a buffer of up to 3 zeroes in front
808 * (at negative indices) for alignment purposes; we use 4
809 * to keep the data well-aligned.
811 tmp = (FLAC__int32*)malloc(sizeof(FLAC__int32)*(size+4));
813 decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
816 memset(tmp, 0, sizeof(FLAC__int32)*4);
817 decoder->private_->output[i] = tmp + 4;
820 * minimum of quadword alignment for PPC vector optimizations is REQUIRED:
822 if(!FLAC__memory_alloc_aligned_int32_array(size, &decoder->private_->residual_unaligned[i], &decoder->private_->residual[i])) {
823 decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
828 decoder->private_->output_capacity = size;
829 decoder->private_->output_channels = channels;
834 FLAC__bool has_id_filtered_(FLAC__StreamDecoder *decoder, FLAC__byte *id)
838 FLAC__ASSERT(0 != decoder);
839 FLAC__ASSERT(0 != decoder->private_);
841 for(i = 0; i < decoder->private_->metadata_filter_ids_count; i++)
842 if(0 == memcmp(decoder->private_->metadata_filter_ids + i * (FLAC__STREAM_METADATA_APPLICATION_ID_LEN/8), id, (FLAC__STREAM_METADATA_APPLICATION_ID_LEN/8)))
848 FLAC__bool find_metadata_(FLAC__StreamDecoder *decoder)
852 FLAC__bool first = true;
854 FLAC__ASSERT(FLAC__bitbuffer_is_consumed_byte_aligned(decoder->private_->input));
856 for(i = id = 0; i < 4; ) {
857 if(decoder->private_->cached) {
858 x = (FLAC__uint32)decoder->private_->lookahead;
859 decoder->private_->cached = false;
862 if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, 8, read_callback_, decoder))
863 return false; /* the read_callback_ sets the state for us */
865 if(x == FLAC__STREAM_SYNC_STRING[i]) {
871 if(x == ID3V2_TAG_[id]) {
875 if(!skip_id3v2_tag_(decoder))
876 return false; /* the read_callback_ sets the state for us */
880 if(x == 0xff) { /* MAGIC NUMBER for the first 8 frame sync bits */
881 decoder->private_->header_warmup[0] = (FLAC__byte)x;
882 if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, 8, read_callback_, decoder))
883 return false; /* the read_callback_ sets the state for us */
885 /* 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 */
886 /* else we have to check if the second byte is the end of a sync code */
887 if(x == 0xff) { /* MAGIC NUMBER for the first 8 frame sync bits */
888 decoder->private_->lookahead = (FLAC__byte)x;
889 decoder->private_->cached = true;
891 else if(x >> 2 == 0x3e) { /* MAGIC NUMBER for the last 6 sync bits */
892 decoder->private_->header_warmup[1] = (FLAC__byte)x;
893 decoder->protected_->state = FLAC__STREAM_DECODER_READ_FRAME;
899 decoder->private_->error_callback(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC, decoder->private_->client_data);
904 decoder->protected_->state = FLAC__STREAM_DECODER_READ_METADATA;
908 FLAC__bool read_metadata_(FLAC__StreamDecoder *decoder)
911 FLAC__uint32 i, x, type, length;
913 FLAC__ASSERT(FLAC__bitbuffer_is_consumed_byte_aligned(decoder->private_->input));
915 if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_IS_LAST_LEN, read_callback_, decoder))
916 return false; /* the read_callback_ sets the state for us */
917 is_last = x? true : false;
919 if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &type, FLAC__STREAM_METADATA_TYPE_LEN, read_callback_, decoder))
920 return false; /* the read_callback_ sets the state for us */
922 if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &length, FLAC__STREAM_METADATA_LENGTH_LEN, read_callback_, decoder))
923 return false; /* the read_callback_ sets the state for us */
925 if(type == FLAC__METADATA_TYPE_STREAMINFO) {
926 if(!read_metadata_streaminfo_(decoder, is_last, length))
929 decoder->private_->has_stream_info = true;
930 if(decoder->private_->metadata_filter[FLAC__METADATA_TYPE_STREAMINFO])
931 decoder->private_->metadata_callback(decoder, &decoder->private_->stream_info, decoder->private_->client_data);
933 else if(type == FLAC__METADATA_TYPE_SEEKTABLE) {
934 if(!read_metadata_seektable_(decoder, is_last, length))
937 decoder->private_->has_seek_table = true;
938 if(decoder->private_->metadata_filter[FLAC__METADATA_TYPE_SEEKTABLE])
939 decoder->private_->metadata_callback(decoder, &decoder->private_->seek_table, decoder->private_->client_data);
942 FLAC__bool skip_it = !decoder->private_->metadata_filter[type];
943 unsigned real_length = length;
944 FLAC__StreamMetadata block;
946 block.is_last = is_last;
947 block.type = (FLAC__MetadataType)type;
948 block.length = length;
950 if(type == FLAC__METADATA_TYPE_APPLICATION) {
951 if(!FLAC__bitbuffer_read_byte_block_aligned_no_crc(decoder->private_->input, block.data.application.id, FLAC__STREAM_METADATA_APPLICATION_ID_LEN/8, read_callback_, decoder))
952 return false; /* the read_callback_ sets the state for us */
954 real_length -= FLAC__STREAM_METADATA_APPLICATION_ID_LEN/8;
956 if(decoder->private_->metadata_filter_ids_count > 0 && has_id_filtered_(decoder, block.data.application.id))
961 if(!FLAC__bitbuffer_read_byte_block_aligned_no_crc(decoder->private_->input, 0, real_length, read_callback_, decoder))
962 return false; /* the read_callback_ sets the state for us */
966 case FLAC__METADATA_TYPE_PADDING:
967 /* skip the padding bytes */
968 if(!FLAC__bitbuffer_read_byte_block_aligned_no_crc(decoder->private_->input, 0, real_length, read_callback_, decoder))
969 return false; /* the read_callback_ sets the state for us */
971 case FLAC__METADATA_TYPE_APPLICATION:
972 /* remember, we read the ID already */
973 if(real_length > 0) {
974 if(0 == (block.data.application.data = (FLAC__byte*)malloc(real_length))) {
975 decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
978 if(!FLAC__bitbuffer_read_byte_block_aligned_no_crc(decoder->private_->input, block.data.application.data, real_length, read_callback_, decoder))
979 return false; /* the read_callback_ sets the state for us */
982 block.data.application.data = 0;
984 case FLAC__METADATA_TYPE_VORBIS_COMMENT:
985 if(!read_metadata_vorbiscomment_(decoder, &block.data.vorbis_comment))
988 case FLAC__METADATA_TYPE_CUESHEET:
989 if(!read_metadata_cuesheet_(decoder, &block.data.cue_sheet))
992 case FLAC__METADATA_TYPE_STREAMINFO:
993 case FLAC__METADATA_TYPE_SEEKTABLE:
997 if(real_length > 0) {
998 if(0 == (block.data.unknown.data = (FLAC__byte*)malloc(real_length))) {
999 decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
1002 if(!FLAC__bitbuffer_read_byte_block_aligned_no_crc(decoder->private_->input, block.data.unknown.data, real_length, read_callback_, decoder))
1003 return false; /* the read_callback_ sets the state for us */
1006 block.data.unknown.data = 0;
1009 decoder->private_->metadata_callback(decoder, &block, decoder->private_->client_data);
1011 /* now we have to free any malloc'ed data in the block */
1013 case FLAC__METADATA_TYPE_PADDING:
1015 case FLAC__METADATA_TYPE_APPLICATION:
1016 if(0 != block.data.application.data)
1017 free(block.data.application.data);
1019 case FLAC__METADATA_TYPE_VORBIS_COMMENT:
1020 if(0 != block.data.vorbis_comment.vendor_string.entry)
1021 free(block.data.vorbis_comment.vendor_string.entry);
1022 if(block.data.vorbis_comment.num_comments > 0)
1023 for(i = 0; i < block.data.vorbis_comment.num_comments; i++)
1024 if(0 != block.data.vorbis_comment.comments[i].entry)
1025 free(block.data.vorbis_comment.comments[i].entry);
1026 if(0 != block.data.vorbis_comment.comments)
1027 free(block.data.vorbis_comment.comments);
1029 case FLAC__METADATA_TYPE_CUESHEET:
1030 if(block.data.cue_sheet.num_tracks > 0)
1031 for(i = 0; i < block.data.cue_sheet.num_tracks; i++)
1032 if(0 != block.data.cue_sheet.tracks[i].indices)
1033 free(block.data.cue_sheet.tracks[i].indices);
1034 if(0 != block.data.cue_sheet.tracks)
1035 free(block.data.cue_sheet.tracks);
1037 case FLAC__METADATA_TYPE_STREAMINFO:
1038 case FLAC__METADATA_TYPE_SEEKTABLE:
1041 if(0 != block.data.unknown.data)
1042 free(block.data.unknown.data);
1049 decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
1054 FLAC__bool read_metadata_streaminfo_(FLAC__StreamDecoder *decoder, FLAC__bool is_last, unsigned length)
1057 unsigned bits, used_bits = 0;
1059 FLAC__ASSERT(FLAC__bitbuffer_is_consumed_byte_aligned(decoder->private_->input));
1061 decoder->private_->stream_info.type = FLAC__METADATA_TYPE_STREAMINFO;
1062 decoder->private_->stream_info.is_last = is_last;
1063 decoder->private_->stream_info.length = length;
1065 bits = FLAC__STREAM_METADATA_STREAMINFO_MIN_BLOCK_SIZE_LEN;
1066 if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, bits, read_callback_, decoder))
1067 return false; /* the read_callback_ sets the state for us */
1068 decoder->private_->stream_info.data.stream_info.min_blocksize = x;
1071 bits = FLAC__STREAM_METADATA_STREAMINFO_MAX_BLOCK_SIZE_LEN;
1072 if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_STREAMINFO_MAX_BLOCK_SIZE_LEN, read_callback_, decoder))
1073 return false; /* the read_callback_ sets the state for us */
1074 decoder->private_->stream_info.data.stream_info.max_blocksize = x;
1077 bits = FLAC__STREAM_METADATA_STREAMINFO_MIN_FRAME_SIZE_LEN;
1078 if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_STREAMINFO_MIN_FRAME_SIZE_LEN, read_callback_, decoder))
1079 return false; /* the read_callback_ sets the state for us */
1080 decoder->private_->stream_info.data.stream_info.min_framesize = x;
1083 bits = FLAC__STREAM_METADATA_STREAMINFO_MAX_FRAME_SIZE_LEN;
1084 if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_STREAMINFO_MAX_FRAME_SIZE_LEN, read_callback_, decoder))
1085 return false; /* the read_callback_ sets the state for us */
1086 decoder->private_->stream_info.data.stream_info.max_framesize = x;
1089 bits = FLAC__STREAM_METADATA_STREAMINFO_SAMPLE_RATE_LEN;
1090 if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_STREAMINFO_SAMPLE_RATE_LEN, read_callback_, decoder))
1091 return false; /* the read_callback_ sets the state for us */
1092 decoder->private_->stream_info.data.stream_info.sample_rate = x;
1095 bits = FLAC__STREAM_METADATA_STREAMINFO_CHANNELS_LEN;
1096 if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_STREAMINFO_CHANNELS_LEN, read_callback_, decoder))
1097 return false; /* the read_callback_ sets the state for us */
1098 decoder->private_->stream_info.data.stream_info.channels = x+1;
1101 bits = FLAC__STREAM_METADATA_STREAMINFO_BITS_PER_SAMPLE_LEN;
1102 if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_STREAMINFO_BITS_PER_SAMPLE_LEN, read_callback_, decoder))
1103 return false; /* the read_callback_ sets the state for us */
1104 decoder->private_->stream_info.data.stream_info.bits_per_sample = x+1;
1107 bits = FLAC__STREAM_METADATA_STREAMINFO_TOTAL_SAMPLES_LEN;
1108 if(!FLAC__bitbuffer_read_raw_uint64(decoder->private_->input, &decoder->private_->stream_info.data.stream_info.total_samples, FLAC__STREAM_METADATA_STREAMINFO_TOTAL_SAMPLES_LEN, read_callback_, decoder))
1109 return false; /* the read_callback_ sets the state for us */
1112 if(!FLAC__bitbuffer_read_byte_block_aligned_no_crc(decoder->private_->input, decoder->private_->stream_info.data.stream_info.md5sum, 16, read_callback_, decoder))
1113 return false; /* the read_callback_ sets the state for us */
1116 /* skip the rest of the block */
1117 FLAC__ASSERT(used_bits % 8 == 0);
1118 length -= (used_bits / 8);
1119 if(!FLAC__bitbuffer_read_byte_block_aligned_no_crc(decoder->private_->input, 0, length, read_callback_, decoder))
1120 return false; /* the read_callback_ sets the state for us */
1125 FLAC__bool read_metadata_seektable_(FLAC__StreamDecoder *decoder, FLAC__bool is_last, unsigned length)
1130 FLAC__ASSERT(FLAC__bitbuffer_is_consumed_byte_aligned(decoder->private_->input));
1132 decoder->private_->seek_table.type = FLAC__METADATA_TYPE_SEEKTABLE;
1133 decoder->private_->seek_table.is_last = is_last;
1134 decoder->private_->seek_table.length = length;
1136 decoder->private_->seek_table.data.seek_table.num_points = length / FLAC__STREAM_METADATA_SEEKPOINT_LENGTH;
1138 /* use realloc since we may pass through here several times (e.g. after seeking) */
1139 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)))) {
1140 decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
1143 for(i = 0; i < decoder->private_->seek_table.data.seek_table.num_points; i++) {
1144 if(!FLAC__bitbuffer_read_raw_uint64(decoder->private_->input, &xx, FLAC__STREAM_METADATA_SEEKPOINT_SAMPLE_NUMBER_LEN, read_callback_, decoder))
1145 return false; /* the read_callback_ sets the state for us */
1146 decoder->private_->seek_table.data.seek_table.points[i].sample_number = xx;
1148 if(!FLAC__bitbuffer_read_raw_uint64(decoder->private_->input, &xx, FLAC__STREAM_METADATA_SEEKPOINT_STREAM_OFFSET_LEN, read_callback_, decoder))
1149 return false; /* the read_callback_ sets the state for us */
1150 decoder->private_->seek_table.data.seek_table.points[i].stream_offset = xx;
1152 if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_SEEKPOINT_FRAME_SAMPLES_LEN, read_callback_, decoder))
1153 return false; /* the read_callback_ sets the state for us */
1154 decoder->private_->seek_table.data.seek_table.points[i].frame_samples = x;
1156 length -= (decoder->private_->seek_table.data.seek_table.num_points * FLAC__STREAM_METADATA_SEEKPOINT_LENGTH);
1157 /* if there is a partial point left, skip over it */
1159 /*@@@ do an error_callback() here? there's an argument for either way */
1160 if(!FLAC__bitbuffer_read_byte_block_aligned_no_crc(decoder->private_->input, 0, length, read_callback_, decoder))
1161 return false; /* the read_callback_ sets the state for us */
1167 FLAC__bool read_metadata_vorbiscomment_(FLAC__StreamDecoder *decoder, FLAC__StreamMetadata_VorbisComment *obj)
1171 FLAC__ASSERT(FLAC__bitbuffer_is_consumed_byte_aligned(decoder->private_->input));
1173 /* read vendor string */
1174 FLAC__ASSERT(FLAC__STREAM_METADATA_VORBIS_COMMENT_ENTRY_LENGTH_LEN == 32);
1175 if(!FLAC__bitbuffer_read_raw_uint32_little_endian(decoder->private_->input, &obj->vendor_string.length, read_callback_, decoder))
1176 return false; /* the read_callback_ sets the state for us */
1177 if(obj->vendor_string.length > 0) {
1178 if(0 == (obj->vendor_string.entry = (FLAC__byte*)malloc(obj->vendor_string.length+1))) {
1179 decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
1182 if(!FLAC__bitbuffer_read_byte_block_aligned_no_crc(decoder->private_->input, obj->vendor_string.entry, obj->vendor_string.length, read_callback_, decoder))
1183 return false; /* the read_callback_ sets the state for us */
1184 obj->vendor_string.entry[obj->vendor_string.length] = '\0';
1187 obj->vendor_string.entry = 0;
1189 /* read num comments */
1190 FLAC__ASSERT(FLAC__STREAM_METADATA_VORBIS_COMMENT_NUM_COMMENTS_LEN == 32);
1191 if(!FLAC__bitbuffer_read_raw_uint32_little_endian(decoder->private_->input, &obj->num_comments, read_callback_, decoder))
1192 return false; /* the read_callback_ sets the state for us */
1195 if(obj->num_comments > 0) {
1196 if(0 == (obj->comments = (FLAC__StreamMetadata_VorbisComment_Entry*)malloc(obj->num_comments * sizeof(FLAC__StreamMetadata_VorbisComment_Entry)))) {
1197 decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
1200 for(i = 0; i < obj->num_comments; i++) {
1201 FLAC__ASSERT(FLAC__STREAM_METADATA_VORBIS_COMMENT_ENTRY_LENGTH_LEN == 32);
1202 if(!FLAC__bitbuffer_read_raw_uint32_little_endian(decoder->private_->input, &obj->comments[i].length, read_callback_, decoder))
1203 return false; /* the read_callback_ sets the state for us */
1204 if(obj->comments[i].length > 0) {
1205 if(0 == (obj->comments[i].entry = (FLAC__byte*)malloc(obj->comments[i].length+1))) {
1206 decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
1209 if(!FLAC__bitbuffer_read_byte_block_aligned_no_crc(decoder->private_->input, obj->comments[i].entry, obj->comments[i].length, read_callback_, decoder))
1210 return false; /* the read_callback_ sets the state for us */
1211 obj->comments[i].entry[obj->comments[i].length] = '\0';
1214 obj->comments[i].entry = 0;
1224 FLAC__bool read_metadata_cuesheet_(FLAC__StreamDecoder *decoder, FLAC__StreamMetadata_CueSheet *obj)
1226 FLAC__uint32 i, j, x;
1228 FLAC__ASSERT(FLAC__bitbuffer_is_consumed_byte_aligned(decoder->private_->input));
1230 memset(obj, 0, sizeof(FLAC__StreamMetadata_CueSheet));
1232 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_MEDIA_CATALOG_NUMBER_LEN % 8 == 0);
1233 if(!FLAC__bitbuffer_read_byte_block_aligned_no_crc(decoder->private_->input, (FLAC__byte*)obj->media_catalog_number, FLAC__STREAM_METADATA_CUESHEET_MEDIA_CATALOG_NUMBER_LEN/8, read_callback_, decoder))
1234 return false; /* the read_callback_ sets the state for us */
1236 if(!FLAC__bitbuffer_read_raw_uint64(decoder->private_->input, &obj->lead_in, FLAC__STREAM_METADATA_CUESHEET_LEAD_IN_LEN, read_callback_, decoder))
1237 return false; /* the read_callback_ sets the state for us */
1239 if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_CUESHEET_IS_CD_LEN, read_callback_, decoder))
1240 return false; /* the read_callback_ sets the state for us */
1241 obj->is_cd = x? true : false;
1243 if(!FLAC__bitbuffer_skip_bits_no_crc(decoder->private_->input, FLAC__STREAM_METADATA_CUESHEET_RESERVED_LEN, read_callback_, decoder))
1244 return false; /* the read_callback_ sets the state for us */
1246 if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_CUESHEET_NUM_TRACKS_LEN, read_callback_, decoder))
1247 return false; /* the read_callback_ sets the state for us */
1248 obj->num_tracks = x;
1250 if(obj->num_tracks > 0) {
1251 if(0 == (obj->tracks = (FLAC__StreamMetadata_CueSheet_Track*)calloc(obj->num_tracks, sizeof(FLAC__StreamMetadata_CueSheet_Track)))) {
1252 decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
1255 for(i = 0; i < obj->num_tracks; i++) {
1256 FLAC__StreamMetadata_CueSheet_Track *track = &obj->tracks[i];
1257 if(!FLAC__bitbuffer_read_raw_uint64(decoder->private_->input, &track->offset, FLAC__STREAM_METADATA_CUESHEET_TRACK_OFFSET_LEN, read_callback_, decoder))
1258 return false; /* the read_callback_ sets the state for us */
1260 if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_CUESHEET_TRACK_NUMBER_LEN, read_callback_, decoder))
1261 return false; /* the read_callback_ sets the state for us */
1262 track->number = (FLAC__byte)x;
1264 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_ISRC_LEN % 8 == 0);
1265 if(!FLAC__bitbuffer_read_byte_block_aligned_no_crc(decoder->private_->input, (FLAC__byte*)track->isrc, FLAC__STREAM_METADATA_CUESHEET_TRACK_ISRC_LEN/8, read_callback_, decoder))
1266 return false; /* the read_callback_ sets the state for us */
1268 if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_CUESHEET_TRACK_TYPE_LEN, read_callback_, decoder))
1269 return false; /* the read_callback_ sets the state for us */
1272 if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_CUESHEET_TRACK_PRE_EMPHASIS_LEN, read_callback_, decoder))
1273 return false; /* the read_callback_ sets the state for us */
1274 track->pre_emphasis = x;
1276 if(!FLAC__bitbuffer_skip_bits_no_crc(decoder->private_->input, FLAC__STREAM_METADATA_CUESHEET_TRACK_RESERVED_LEN, read_callback_, decoder))
1277 return false; /* the read_callback_ sets the state for us */
1279 if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_CUESHEET_TRACK_NUM_INDICES_LEN, read_callback_, decoder))
1280 return false; /* the read_callback_ sets the state for us */
1281 track->num_indices = (FLAC__byte)x;
1283 if(track->num_indices > 0) {
1284 if(0 == (track->indices = (FLAC__StreamMetadata_CueSheet_Index*)calloc(track->num_indices, sizeof(FLAC__StreamMetadata_CueSheet_Index)))) {
1285 decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
1288 for(j = 0; j < track->num_indices; j++) {
1289 FLAC__StreamMetadata_CueSheet_Index *index = &track->indices[j];
1290 if(!FLAC__bitbuffer_read_raw_uint64(decoder->private_->input, &index->offset, FLAC__STREAM_METADATA_CUESHEET_INDEX_OFFSET_LEN, read_callback_, decoder))
1291 return false; /* the read_callback_ sets the state for us */
1293 if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_CUESHEET_INDEX_NUMBER_LEN, read_callback_, decoder))
1294 return false; /* the read_callback_ sets the state for us */
1295 index->number = (FLAC__byte)x;
1297 if(!FLAC__bitbuffer_skip_bits_no_crc(decoder->private_->input, FLAC__STREAM_METADATA_CUESHEET_INDEX_RESERVED_LEN, read_callback_, decoder))
1298 return false; /* the read_callback_ sets the state for us */
1307 FLAC__bool skip_id3v2_tag_(FLAC__StreamDecoder *decoder)
1312 /* skip the version and flags bytes */
1313 if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, 24, read_callback_, decoder))
1314 return false; /* the read_callback_ sets the state for us */
1315 /* get the size (in bytes) to skip */
1317 for(i = 0; i < 4; i++) {
1318 if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, 8, read_callback_, decoder))
1319 return false; /* the read_callback_ sets the state for us */
1323 /* skip the rest of the tag */
1324 if(!FLAC__bitbuffer_read_byte_block_aligned_no_crc(decoder->private_->input, 0, skip, read_callback_, decoder))
1325 return false; /* the read_callback_ sets the state for us */
1329 FLAC__bool frame_sync_(FLAC__StreamDecoder *decoder)
1332 FLAC__bool first = true;
1334 /* If we know the total number of samples in the stream, stop if we've read that many. */
1335 /* This will stop us, for example, from wasting time trying to sync on an ID3V1 tag. */
1336 if(decoder->private_->has_stream_info && decoder->private_->stream_info.data.stream_info.total_samples) {
1337 if(decoder->private_->samples_decoded >= decoder->private_->stream_info.data.stream_info.total_samples) {
1338 decoder->protected_->state = FLAC__STREAM_DECODER_END_OF_STREAM;
1343 /* make sure we're byte aligned */
1344 if(!FLAC__bitbuffer_is_consumed_byte_aligned(decoder->private_->input)) {
1345 if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, FLAC__bitbuffer_bits_left_for_byte_alignment(decoder->private_->input), read_callback_, decoder))
1346 return false; /* the read_callback_ sets the state for us */
1350 if(decoder->private_->cached) {
1351 x = (FLAC__uint32)decoder->private_->lookahead;
1352 decoder->private_->cached = false;
1355 if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, 8, read_callback_, decoder))
1356 return false; /* the read_callback_ sets the state for us */
1358 if(x == 0xff) { /* MAGIC NUMBER for the first 8 frame sync bits */
1359 decoder->private_->header_warmup[0] = (FLAC__byte)x;
1360 if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, 8, read_callback_, decoder))
1361 return false; /* the read_callback_ sets the state for us */
1363 /* 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 */
1364 /* else we have to check if the second byte is the end of a sync code */
1365 if(x == 0xff) { /* MAGIC NUMBER for the first 8 frame sync bits */
1366 decoder->private_->lookahead = (FLAC__byte)x;
1367 decoder->private_->cached = true;
1369 else if(x >> 2 == 0x3e) { /* MAGIC NUMBER for the last 6 sync bits */
1370 decoder->private_->header_warmup[1] = (FLAC__byte)x;
1371 decoder->protected_->state = FLAC__STREAM_DECODER_READ_FRAME;
1376 decoder->private_->error_callback(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC, decoder->private_->client_data);
1384 FLAC__bool read_frame_(FLAC__StreamDecoder *decoder, FLAC__bool *got_a_frame, FLAC__bool do_full_decode)
1388 FLAC__int32 mid, side, left, right;
1389 FLAC__uint16 frame_crc; /* the one we calculate from the input stream */
1392 *got_a_frame = false;
1396 FLAC__CRC16_UPDATE(decoder->private_->header_warmup[0], frame_crc);
1397 FLAC__CRC16_UPDATE(decoder->private_->header_warmup[1], frame_crc);
1398 FLAC__bitbuffer_reset_read_crc16(decoder->private_->input, frame_crc);
1400 if(!read_frame_header_(decoder))
1402 if(decoder->protected_->state == FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC) /* means we didn't sync on a valid header */
1404 if(!allocate_output_(decoder, decoder->private_->frame.header.blocksize, decoder->private_->frame.header.channels))
1406 for(channel = 0; channel < decoder->private_->frame.header.channels; channel++) {
1408 * first figure the correct bits-per-sample of the subframe
1410 unsigned bps = decoder->private_->frame.header.bits_per_sample;
1411 switch(decoder->private_->frame.header.channel_assignment) {
1412 case FLAC__CHANNEL_ASSIGNMENT_INDEPENDENT:
1413 /* no adjustment needed */
1415 case FLAC__CHANNEL_ASSIGNMENT_LEFT_SIDE:
1416 FLAC__ASSERT(decoder->private_->frame.header.channels == 2);
1420 case FLAC__CHANNEL_ASSIGNMENT_RIGHT_SIDE:
1421 FLAC__ASSERT(decoder->private_->frame.header.channels == 2);
1425 case FLAC__CHANNEL_ASSIGNMENT_MID_SIDE:
1426 FLAC__ASSERT(decoder->private_->frame.header.channels == 2);
1436 if(!read_subframe_(decoder, channel, bps, do_full_decode))
1438 if(decoder->protected_->state == FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC) /* means bad sync or got corruption */
1441 if(!read_zero_padding_(decoder))
1445 * Read the frame CRC-16 from the footer and check
1447 frame_crc = FLAC__bitbuffer_get_read_crc16(decoder->private_->input);
1448 if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, FLAC__FRAME_FOOTER_CRC_LEN, read_callback_, decoder))
1449 return false; /* the read_callback_ sets the state for us */
1450 if(frame_crc == (FLAC__uint16)x) {
1451 if(do_full_decode) {
1452 /* Undo any special channel coding */
1453 switch(decoder->private_->frame.header.channel_assignment) {
1454 case FLAC__CHANNEL_ASSIGNMENT_INDEPENDENT:
1457 case FLAC__CHANNEL_ASSIGNMENT_LEFT_SIDE:
1458 FLAC__ASSERT(decoder->private_->frame.header.channels == 2);
1459 for(i = 0; i < decoder->private_->frame.header.blocksize; i++)
1460 decoder->private_->output[1][i] = decoder->private_->output[0][i] - decoder->private_->output[1][i];
1462 case FLAC__CHANNEL_ASSIGNMENT_RIGHT_SIDE:
1463 FLAC__ASSERT(decoder->private_->frame.header.channels == 2);
1464 for(i = 0; i < decoder->private_->frame.header.blocksize; i++)
1465 decoder->private_->output[0][i] += decoder->private_->output[1][i];
1467 case FLAC__CHANNEL_ASSIGNMENT_MID_SIDE:
1468 FLAC__ASSERT(decoder->private_->frame.header.channels == 2);
1469 for(i = 0; i < decoder->private_->frame.header.blocksize; i++) {
1470 mid = decoder->private_->output[0][i];
1471 side = decoder->private_->output[1][i];
1473 if(side & 1) /* i.e. if 'side' is odd... */
1477 decoder->private_->output[0][i] = left >> 1;
1478 decoder->private_->output[1][i] = right >> 1;
1488 /* Bad frame, emit error and zero the output signal */
1489 decoder->private_->error_callback(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_FRAME_CRC_MISMATCH, decoder->private_->client_data);
1490 if(do_full_decode) {
1491 for(channel = 0; channel < decoder->private_->frame.header.channels; channel++) {
1492 memset(decoder->private_->output[channel], 0, sizeof(FLAC__int32) * decoder->private_->frame.header.blocksize);
1497 *got_a_frame = true;
1499 /* put the latest values into the public section of the decoder instance */
1500 decoder->protected_->channels = decoder->private_->frame.header.channels;
1501 decoder->protected_->channel_assignment = decoder->private_->frame.header.channel_assignment;
1502 decoder->protected_->bits_per_sample = decoder->private_->frame.header.bits_per_sample;
1503 decoder->protected_->sample_rate = decoder->private_->frame.header.sample_rate;
1504 decoder->protected_->blocksize = decoder->private_->frame.header.blocksize;
1506 FLAC__ASSERT(decoder->private_->frame.header.number_type == FLAC__FRAME_NUMBER_TYPE_SAMPLE_NUMBER);
1507 decoder->private_->samples_decoded = decoder->private_->frame.header.number.sample_number + decoder->private_->frame.header.blocksize;
1510 if(do_full_decode) {
1511 if(decoder->private_->write_callback(decoder, &decoder->private_->frame, (const FLAC__int32 * const *)decoder->private_->output, decoder->private_->client_data) != FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE)
1515 decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
1519 FLAC__bool read_frame_header_(FLAC__StreamDecoder *decoder)
1523 unsigned i, blocksize_hint = 0, sample_rate_hint = 0;
1524 FLAC__byte crc8, raw_header[16]; /* MAGIC NUMBER based on the maximum frame header size, including CRC */
1525 unsigned raw_header_len;
1526 FLAC__bool is_unparseable = false;
1527 const FLAC__bool is_known_variable_blocksize_stream = (decoder->private_->has_stream_info && decoder->private_->stream_info.data.stream_info.min_blocksize != decoder->private_->stream_info.data.stream_info.max_blocksize);
1528 const FLAC__bool is_known_fixed_blocksize_stream = (decoder->private_->has_stream_info && decoder->private_->stream_info.data.stream_info.min_blocksize == decoder->private_->stream_info.data.stream_info.max_blocksize);
1530 FLAC__ASSERT(FLAC__bitbuffer_is_consumed_byte_aligned(decoder->private_->input));
1532 /* init the raw header with the saved bits from synchronization */
1533 raw_header[0] = decoder->private_->header_warmup[0];
1534 raw_header[1] = decoder->private_->header_warmup[1];
1538 * check to make sure that the reserved bits are 0
1540 if(raw_header[1] & 0x03) { /* MAGIC NUMBER */
1541 is_unparseable = true;
1545 * Note that along the way as we read the header, we look for a sync
1546 * code inside. If we find one it would indicate that our original
1547 * sync was bad since there cannot be a sync code in a valid header.
1551 * read in the raw header as bytes so we can CRC it, and parse it on the way
1553 for(i = 0; i < 2; i++) {
1554 if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, 8, read_callback_, decoder))
1555 return false; /* the read_callback_ sets the state for us */
1556 if(x == 0xff) { /* MAGIC NUMBER for the first 8 frame sync bits */
1557 /* if we get here it means our original sync was erroneous since the sync code cannot appear in the header */
1558 decoder->private_->lookahead = (FLAC__byte)x;
1559 decoder->private_->cached = true;
1560 decoder->private_->error_callback(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_BAD_HEADER, decoder->private_->client_data);
1561 decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
1564 raw_header[raw_header_len++] = (FLAC__byte)x;
1567 switch(x = raw_header[2] >> 4) {
1569 if(is_known_fixed_blocksize_stream)
1570 decoder->private_->frame.header.blocksize = decoder->private_->stream_info.data.stream_info.min_blocksize;
1572 is_unparseable = true;
1575 decoder->private_->frame.header.blocksize = 192;
1581 decoder->private_->frame.header.blocksize = 576 << (x-2);
1595 decoder->private_->frame.header.blocksize = 256 << (x-8);
1602 switch(x = raw_header[2] & 0x0f) {
1604 if(decoder->private_->has_stream_info)
1605 decoder->private_->frame.header.sample_rate = decoder->private_->stream_info.data.stream_info.sample_rate;
1607 is_unparseable = true;
1612 is_unparseable = true;
1615 decoder->private_->frame.header.sample_rate = 8000;
1618 decoder->private_->frame.header.sample_rate = 16000;
1621 decoder->private_->frame.header.sample_rate = 22050;
1624 decoder->private_->frame.header.sample_rate = 24000;
1627 decoder->private_->frame.header.sample_rate = 32000;
1630 decoder->private_->frame.header.sample_rate = 44100;
1633 decoder->private_->frame.header.sample_rate = 48000;
1636 decoder->private_->frame.header.sample_rate = 96000;
1641 sample_rate_hint = x;
1644 decoder->private_->error_callback(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_BAD_HEADER, decoder->private_->client_data);
1645 decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
1651 x = (unsigned)(raw_header[3] >> 4);
1653 decoder->private_->frame.header.channels = 2;
1656 decoder->private_->frame.header.channel_assignment = FLAC__CHANNEL_ASSIGNMENT_LEFT_SIDE;
1659 decoder->private_->frame.header.channel_assignment = FLAC__CHANNEL_ASSIGNMENT_RIGHT_SIDE;
1662 decoder->private_->frame.header.channel_assignment = FLAC__CHANNEL_ASSIGNMENT_MID_SIDE;
1665 is_unparseable = true;
1670 decoder->private_->frame.header.channels = (unsigned)x + 1;
1671 decoder->private_->frame.header.channel_assignment = FLAC__CHANNEL_ASSIGNMENT_INDEPENDENT;
1674 switch(x = (unsigned)(raw_header[3] & 0x0e) >> 1) {
1676 if(decoder->private_->has_stream_info)
1677 decoder->private_->frame.header.bits_per_sample = decoder->private_->stream_info.data.stream_info.bits_per_sample;
1679 is_unparseable = true;
1682 decoder->private_->frame.header.bits_per_sample = 8;
1685 decoder->private_->frame.header.bits_per_sample = 12;
1688 decoder->private_->frame.header.bits_per_sample = 16;
1691 decoder->private_->frame.header.bits_per_sample = 20;
1694 decoder->private_->frame.header.bits_per_sample = 24;
1698 is_unparseable = true;
1705 if(raw_header[3] & 0x01) { /* this should be a zero padding bit */
1706 decoder->private_->error_callback(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_BAD_HEADER, decoder->private_->client_data);
1707 decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
1712 * Now we get to the regrettable consequences of not knowing for sure
1713 * whether we got a frame number or a sample number. There are no
1714 * encoders that do variable-blocksize encoding so unless we know from
1715 * the STREAMINFO that it is variable-blocksize we will assume it is
1716 * fixed-blocksize. The trouble comes when we have no STREAMINFO; again
1717 * we will guess that is fixed-blocksize. Where this can go wrong: 1) a
1718 * variable-blocksize stream with no STREAMINFO; 2) a fixed-blocksize
1719 * stream that was edited such that one or more frames before or
1720 * including this one do not have the same number of samples as the
1721 * STREAMINFO's min and max blocksize.
1723 if(is_known_variable_blocksize_stream) {
1724 if(blocksize_hint) {
1725 if(!FLAC__bitbuffer_read_utf8_uint64(decoder->private_->input, &xx, read_callback_, decoder, raw_header, &raw_header_len))
1726 return false; /* the read_callback_ sets the state for us */
1727 if(xx == FLAC__U64L(0xffffffffffffffff)) { /* i.e. non-UTF8 code... */
1728 decoder->private_->lookahead = raw_header[raw_header_len-1]; /* back up as much as we can */
1729 decoder->private_->cached = true;
1730 decoder->private_->error_callback(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_BAD_HEADER, decoder->private_->client_data);
1731 decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
1734 decoder->private_->frame.header.number_type = FLAC__FRAME_NUMBER_TYPE_SAMPLE_NUMBER;
1735 decoder->private_->frame.header.number.sample_number = xx;
1738 is_unparseable = true;
1741 if(!FLAC__bitbuffer_read_utf8_uint32(decoder->private_->input, &x, read_callback_, decoder, raw_header, &raw_header_len))
1742 return false; /* the read_callback_ sets the state for us */
1743 if(x == 0xffffffff) { /* i.e. non-UTF8 code... */
1744 decoder->private_->lookahead = raw_header[raw_header_len-1]; /* back up as much as we can */
1745 decoder->private_->cached = true;
1746 decoder->private_->error_callback(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_BAD_HEADER, decoder->private_->client_data);
1747 decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
1750 decoder->private_->last_frame_number = x;
1751 decoder->private_->frame.header.number_type = FLAC__FRAME_NUMBER_TYPE_SAMPLE_NUMBER;
1752 if(decoder->private_->has_stream_info) {
1753 FLAC__ASSERT(decoder->private_->stream_info.data.stream_info.min_blocksize == decoder->private_->stream_info.data.stream_info.max_blocksize);
1754 decoder->private_->frame.header.number.sample_number = (FLAC__uint64)decoder->private_->stream_info.data.stream_info.min_blocksize * (FLAC__uint64)x;
1755 decoder->private_->last_block_size = decoder->private_->frame.header.blocksize;
1757 else if(blocksize_hint) {
1758 if(decoder->private_->last_block_size)
1759 decoder->private_->frame.header.number.sample_number = (FLAC__uint64)decoder->private_->last_block_size * (FLAC__uint64)x;
1761 is_unparseable = true;
1764 decoder->private_->frame.header.number.sample_number = (FLAC__uint64)decoder->private_->frame.header.blocksize * (FLAC__uint64)x;
1765 decoder->private_->last_block_size = decoder->private_->frame.header.blocksize;
1769 if(blocksize_hint) {
1770 if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, 8, read_callback_, decoder))
1771 return false; /* the read_callback_ sets the state for us */
1772 raw_header[raw_header_len++] = (FLAC__byte)x;
1773 if(blocksize_hint == 7) {
1775 if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &_x, 8, read_callback_, decoder))
1776 return false; /* the read_callback_ sets the state for us */
1777 raw_header[raw_header_len++] = (FLAC__byte)_x;
1780 decoder->private_->frame.header.blocksize = x+1;
1783 if(sample_rate_hint) {
1784 if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, 8, read_callback_, decoder))
1785 return false; /* the read_callback_ sets the state for us */
1786 raw_header[raw_header_len++] = (FLAC__byte)x;
1787 if(sample_rate_hint != 12) {
1789 if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &_x, 8, read_callback_, decoder))
1790 return false; /* the read_callback_ sets the state for us */
1791 raw_header[raw_header_len++] = (FLAC__byte)_x;
1794 if(sample_rate_hint == 12)
1795 decoder->private_->frame.header.sample_rate = x*1000;
1796 else if(sample_rate_hint == 13)
1797 decoder->private_->frame.header.sample_rate = x;
1799 decoder->private_->frame.header.sample_rate = x*10;
1802 /* read the CRC-8 byte */
1803 if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, 8, read_callback_, decoder))
1804 return false; /* the read_callback_ sets the state for us */
1805 crc8 = (FLAC__byte)x;
1807 if(FLAC__crc8(raw_header, raw_header_len) != crc8) {
1808 decoder->private_->error_callback(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_BAD_HEADER, decoder->private_->client_data);
1809 decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
1813 if(is_unparseable) {
1814 decoder->private_->error_callback(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_UNPARSEABLE_STREAM, decoder->private_->client_data);
1815 decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
1822 FLAC__bool read_subframe_(FLAC__StreamDecoder *decoder, unsigned channel, unsigned bps, FLAC__bool do_full_decode)
1825 FLAC__bool wasted_bits;
1828 if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, 8, read_callback_, decoder)) /* MAGIC NUMBER */
1829 return false; /* the read_callback_ sets the state for us */
1831 wasted_bits = (x & 1);
1836 if(!FLAC__bitbuffer_read_unary_unsigned(decoder->private_->input, &u, read_callback_, decoder))
1837 return false; /* the read_callback_ sets the state for us */
1838 decoder->private_->frame.subframes[channel].wasted_bits = u+1;
1839 bps -= decoder->private_->frame.subframes[channel].wasted_bits;
1842 decoder->private_->frame.subframes[channel].wasted_bits = 0;
1845 * Lots of magic numbers here
1848 decoder->private_->error_callback(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC, decoder->private_->client_data);
1849 decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
1853 if(!read_subframe_constant_(decoder, channel, bps, do_full_decode))
1857 if(!read_subframe_verbatim_(decoder, channel, bps, do_full_decode))
1861 decoder->private_->error_callback(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_UNPARSEABLE_STREAM, decoder->private_->client_data);
1862 decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
1866 if(!read_subframe_fixed_(decoder, channel, bps, (x>>1)&7, do_full_decode))
1868 if(decoder->protected_->state == FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC) /* means bad sync or got corruption */
1872 decoder->private_->error_callback(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_UNPARSEABLE_STREAM, decoder->private_->client_data);
1873 decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
1877 if(!read_subframe_lpc_(decoder, channel, bps, ((x>>1)&31)+1, do_full_decode))
1879 if(decoder->protected_->state == FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC) /* means bad sync or got corruption */
1883 if(wasted_bits && do_full_decode) {
1884 x = decoder->private_->frame.subframes[channel].wasted_bits;
1885 for(i = 0; i < decoder->private_->frame.header.blocksize; i++)
1886 decoder->private_->output[channel][i] <<= x;
1892 FLAC__bool read_subframe_constant_(FLAC__StreamDecoder *decoder, unsigned channel, unsigned bps, FLAC__bool do_full_decode)
1894 FLAC__Subframe_Constant *subframe = &decoder->private_->frame.subframes[channel].data.constant;
1897 FLAC__int32 *output = decoder->private_->output[channel];
1899 decoder->private_->frame.subframes[channel].type = FLAC__SUBFRAME_TYPE_CONSTANT;
1901 if(!FLAC__bitbuffer_read_raw_int32(decoder->private_->input, &x, bps, read_callback_, decoder))
1902 return false; /* the read_callback_ sets the state for us */
1904 subframe->value = x;
1906 /* decode the subframe */
1907 if(do_full_decode) {
1908 for(i = 0; i < decoder->private_->frame.header.blocksize; i++)
1915 FLAC__bool read_subframe_fixed_(FLAC__StreamDecoder *decoder, unsigned channel, unsigned bps, const unsigned order, FLAC__bool do_full_decode)
1917 FLAC__Subframe_Fixed *subframe = &decoder->private_->frame.subframes[channel].data.fixed;
1922 decoder->private_->frame.subframes[channel].type = FLAC__SUBFRAME_TYPE_FIXED;
1924 subframe->residual = decoder->private_->residual[channel];
1925 subframe->order = order;
1927 /* read warm-up samples */
1928 for(u = 0; u < order; u++) {
1929 if(!FLAC__bitbuffer_read_raw_int32(decoder->private_->input, &i32, bps, read_callback_, decoder))
1930 return false; /* the read_callback_ sets the state for us */
1931 subframe->warmup[u] = i32;
1934 /* read entropy coding method info */
1935 if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &u32, FLAC__ENTROPY_CODING_METHOD_TYPE_LEN, read_callback_, decoder))
1936 return false; /* the read_callback_ sets the state for us */
1937 subframe->entropy_coding_method.type = (FLAC__EntropyCodingMethodType)u32;
1938 switch(subframe->entropy_coding_method.type) {
1939 case FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE:
1940 if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &u32, FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ORDER_LEN, read_callback_, decoder))
1941 return false; /* the read_callback_ sets the state for us */
1942 subframe->entropy_coding_method.data.partitioned_rice.order = u32;
1943 subframe->entropy_coding_method.data.partitioned_rice.contents = &decoder->private_->partitioned_rice_contents[channel];
1946 decoder->private_->error_callback(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_UNPARSEABLE_STREAM, decoder->private_->client_data);
1947 decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
1952 switch(subframe->entropy_coding_method.type) {
1953 case FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE:
1954 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]))
1961 /* decode the subframe */
1962 if(do_full_decode) {
1963 memcpy(decoder->private_->output[channel], subframe->warmup, sizeof(FLAC__int32) * order);
1964 FLAC__fixed_restore_signal(decoder->private_->residual[channel], decoder->private_->frame.header.blocksize-order, order, decoder->private_->output[channel]+order);
1970 FLAC__bool read_subframe_lpc_(FLAC__StreamDecoder *decoder, unsigned channel, unsigned bps, const unsigned order, FLAC__bool do_full_decode)
1972 FLAC__Subframe_LPC *subframe = &decoder->private_->frame.subframes[channel].data.lpc;
1977 decoder->private_->frame.subframes[channel].type = FLAC__SUBFRAME_TYPE_LPC;
1979 subframe->residual = decoder->private_->residual[channel];
1980 subframe->order = order;
1982 /* read warm-up samples */
1983 for(u = 0; u < order; u++) {
1984 if(!FLAC__bitbuffer_read_raw_int32(decoder->private_->input, &i32, bps, read_callback_, decoder))
1985 return false; /* the read_callback_ sets the state for us */
1986 subframe->warmup[u] = i32;
1989 /* read qlp coeff precision */
1990 if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &u32, FLAC__SUBFRAME_LPC_QLP_COEFF_PRECISION_LEN, read_callback_, decoder))
1991 return false; /* the read_callback_ sets the state for us */
1992 if(u32 == (1u << FLAC__SUBFRAME_LPC_QLP_COEFF_PRECISION_LEN) - 1) {
1993 decoder->private_->error_callback(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC, decoder->private_->client_data);
1994 decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
1997 subframe->qlp_coeff_precision = u32+1;
1999 /* read qlp shift */
2000 if(!FLAC__bitbuffer_read_raw_int32(decoder->private_->input, &i32, FLAC__SUBFRAME_LPC_QLP_SHIFT_LEN, read_callback_, decoder))
2001 return false; /* the read_callback_ sets the state for us */
2002 subframe->quantization_level = i32;
2004 /* read quantized lp coefficiencts */
2005 for(u = 0; u < order; u++) {
2006 if(!FLAC__bitbuffer_read_raw_int32(decoder->private_->input, &i32, subframe->qlp_coeff_precision, read_callback_, decoder))
2007 return false; /* the read_callback_ sets the state for us */
2008 subframe->qlp_coeff[u] = i32;
2011 /* read entropy coding method info */
2012 if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &u32, FLAC__ENTROPY_CODING_METHOD_TYPE_LEN, read_callback_, decoder))
2013 return false; /* the read_callback_ sets the state for us */
2014 subframe->entropy_coding_method.type = (FLAC__EntropyCodingMethodType)u32;
2015 switch(subframe->entropy_coding_method.type) {
2016 case FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE:
2017 if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &u32, FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ORDER_LEN, read_callback_, decoder))
2018 return false; /* the read_callback_ sets the state for us */
2019 subframe->entropy_coding_method.data.partitioned_rice.order = u32;
2020 subframe->entropy_coding_method.data.partitioned_rice.contents = &decoder->private_->partitioned_rice_contents[channel];
2023 decoder->private_->error_callback(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_UNPARSEABLE_STREAM, decoder->private_->client_data);
2024 decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
2029 switch(subframe->entropy_coding_method.type) {
2030 case FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE:
2031 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]))
2038 /* decode the subframe */
2039 if(do_full_decode) {
2040 memcpy(decoder->private_->output[channel], subframe->warmup, sizeof(FLAC__int32) * order);
2041 if(bps + subframe->qlp_coeff_precision + FLAC__bitmath_ilog2(order) <= 32)
2042 if(bps <= 16 && subframe->qlp_coeff_precision <= 16) {
2044 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);
2046 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);
2049 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);
2051 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);
2057 FLAC__bool read_subframe_verbatim_(FLAC__StreamDecoder *decoder, unsigned channel, unsigned bps, FLAC__bool do_full_decode)
2059 FLAC__Subframe_Verbatim *subframe = &decoder->private_->frame.subframes[channel].data.verbatim;
2060 FLAC__int32 x, *residual = decoder->private_->residual[channel];
2063 decoder->private_->frame.subframes[channel].type = FLAC__SUBFRAME_TYPE_VERBATIM;
2065 subframe->data = residual;
2067 for(i = 0; i < decoder->private_->frame.header.blocksize; i++) {
2068 if(!FLAC__bitbuffer_read_raw_int32(decoder->private_->input, &x, bps, read_callback_, decoder))
2069 return false; /* the read_callback_ sets the state for us */
2073 /* decode the subframe */
2075 memcpy(decoder->private_->output[channel], subframe->data, sizeof(FLAC__int32) * decoder->private_->frame.header.blocksize);
2080 FLAC__bool read_residual_partitioned_rice_(FLAC__StreamDecoder *decoder, unsigned predictor_order, unsigned partition_order, FLAC__EntropyCodingMethod_PartitionedRiceContents *partitioned_rice_contents, FLAC__int32 *residual)
2082 FLAC__uint32 rice_parameter;
2084 unsigned partition, sample, u;
2085 const unsigned partitions = 1u << partition_order;
2086 const unsigned partition_samples = partition_order > 0? decoder->private_->frame.header.blocksize >> partition_order : decoder->private_->frame.header.blocksize - predictor_order;
2089 if(partition_order == 0) {
2090 if(decoder->private_->frame.header.blocksize < predictor_order) {
2091 decoder->private_->error_callback(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC, decoder->private_->client_data);
2092 decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
2097 if(partition_samples < predictor_order) {
2098 decoder->private_->error_callback(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC, decoder->private_->client_data);
2099 decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
2104 if(!FLAC__format_entropy_coding_method_partitioned_rice_contents_ensure_size(partitioned_rice_contents, max(6, partition_order))) {
2105 decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
2110 for(partition = 0; partition < partitions; partition++) {
2111 if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &rice_parameter, FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_PARAMETER_LEN, read_callback_, decoder))
2112 return false; /* the read_callback_ sets the state for us */
2113 partitioned_rice_contents->parameters[partition] = rice_parameter;
2114 if(rice_parameter < FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER) {
2115 u = (partition_order == 0 || partition > 0)? partition_samples : partition_samples - predictor_order;
2116 if(!FLAC__bitbuffer_read_rice_signed_block(decoder->private_->input, residual + sample, u, rice_parameter, read_callback_, decoder))
2117 return false; /* the read_callback_ sets the state for us */
2121 if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &rice_parameter, FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_RAW_LEN, read_callback_, decoder))
2122 return false; /* the read_callback_ sets the state for us */
2123 partitioned_rice_contents->raw_bits[partition] = rice_parameter;
2124 for(u = (partition_order == 0 || partition > 0)? 0 : predictor_order; u < partition_samples; u++, sample++) {
2125 if(!FLAC__bitbuffer_read_raw_int32(decoder->private_->input, &i, rice_parameter, read_callback_, decoder))
2126 return false; /* the read_callback_ sets the state for us */
2127 residual[sample] = i;
2135 FLAC__bool read_zero_padding_(FLAC__StreamDecoder *decoder)
2137 if(!FLAC__bitbuffer_is_consumed_byte_aligned(decoder->private_->input)) {
2138 FLAC__uint32 zero = 0;
2139 if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &zero, FLAC__bitbuffer_bits_left_for_byte_alignment(decoder->private_->input), read_callback_, decoder))
2140 return false; /* the read_callback_ sets the state for us */
2142 decoder->private_->error_callback(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC, decoder->private_->client_data);
2143 decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
2149 FLAC__bool read_callback_(FLAC__byte buffer[], unsigned *bytes, void *client_data)
2151 FLAC__StreamDecoder *decoder = (FLAC__StreamDecoder *)client_data;
2152 FLAC__StreamDecoderReadStatus status;
2154 status = decoder->private_->read_callback(decoder, buffer, bytes, decoder->private_->client_data);
2155 if(status == FLAC__STREAM_DECODER_READ_STATUS_END_OF_STREAM)
2156 decoder->protected_->state = FLAC__STREAM_DECODER_END_OF_STREAM;
2157 else if(status == FLAC__STREAM_DECODER_READ_STATUS_ABORT)
2158 decoder->protected_->state = FLAC__STREAM_DECODER_ABORTED;
2159 return status == FLAC__STREAM_DECODER_READ_STATUS_CONTINUE;