1 /* libFLAC - Free Lossless Audio Codec library
2 * Copyright (C) 2000-2009 Josh Coalson
3 * Copyright (C) 2011-2013 Xiph.Org Foundation
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
9 * - Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
12 * - Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
16 * - Neither the name of the Xiph.org Foundation nor the names of its
17 * contributors may be used to endorse or promote products derived from
18 * this software without specific prior written permission.
20 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
21 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
22 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
23 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR
24 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
25 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
26 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
27 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
28 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
29 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
30 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
38 #include <stdlib.h> /* for malloc() */
39 #include <string.h> /* for memset/memcpy() */
40 #include <sys/stat.h> /* for stat() */
41 #include <sys/types.h> /* for off_t */
42 #include "share/compat.h"
43 #include "FLAC/assert.h"
44 #include "share/alloc.h"
45 #include "protected/stream_decoder.h"
46 #include "private/bitreader.h"
47 #include "private/bitmath.h"
48 #include "private/cpu.h"
49 #include "private/crc.h"
50 #include "private/fixed.h"
51 #include "private/format.h"
52 #include "private/lpc.h"
53 #include "private/md5.h"
54 #include "private/memory.h"
55 #include "private/macros.h"
58 /* technically this should be in an "export.c" but this is convenient enough */
59 FLAC_API int FLAC_API_SUPPORTS_OGG_FLAC =
68 /***********************************************************************
72 ***********************************************************************/
74 static const FLAC__byte ID3V2_TAG_[3] = { 'I', 'D', '3' };
76 /***********************************************************************
78 * Private class method prototypes
80 ***********************************************************************/
82 static void set_defaults_(FLAC__StreamDecoder *decoder);
83 static FILE *get_binary_stdin_(void);
84 static FLAC__bool allocate_output_(FLAC__StreamDecoder *decoder, unsigned size, unsigned channels);
85 static FLAC__bool has_id_filtered_(FLAC__StreamDecoder *decoder, FLAC__byte *id);
86 static FLAC__bool find_metadata_(FLAC__StreamDecoder *decoder);
87 static FLAC__bool read_metadata_(FLAC__StreamDecoder *decoder);
88 static FLAC__bool read_metadata_streaminfo_(FLAC__StreamDecoder *decoder, FLAC__bool is_last, unsigned length);
89 static FLAC__bool read_metadata_seektable_(FLAC__StreamDecoder *decoder, FLAC__bool is_last, unsigned length);
90 static FLAC__bool read_metadata_vorbiscomment_(FLAC__StreamDecoder *decoder, FLAC__StreamMetadata_VorbisComment *obj);
91 static FLAC__bool read_metadata_cuesheet_(FLAC__StreamDecoder *decoder, FLAC__StreamMetadata_CueSheet *obj);
92 static FLAC__bool read_metadata_picture_(FLAC__StreamDecoder *decoder, FLAC__StreamMetadata_Picture *obj);
93 static FLAC__bool skip_id3v2_tag_(FLAC__StreamDecoder *decoder);
94 static FLAC__bool frame_sync_(FLAC__StreamDecoder *decoder);
95 static FLAC__bool read_frame_(FLAC__StreamDecoder *decoder, FLAC__bool *got_a_frame, FLAC__bool do_full_decode);
96 static FLAC__bool read_frame_header_(FLAC__StreamDecoder *decoder);
97 static FLAC__bool read_subframe_(FLAC__StreamDecoder *decoder, unsigned channel, unsigned bps, FLAC__bool do_full_decode);
98 static FLAC__bool read_subframe_constant_(FLAC__StreamDecoder *decoder, unsigned channel, unsigned bps, FLAC__bool do_full_decode);
99 static FLAC__bool read_subframe_fixed_(FLAC__StreamDecoder *decoder, unsigned channel, unsigned bps, const unsigned order, FLAC__bool do_full_decode);
100 static FLAC__bool read_subframe_lpc_(FLAC__StreamDecoder *decoder, unsigned channel, unsigned bps, const unsigned order, FLAC__bool do_full_decode);
101 static FLAC__bool read_subframe_verbatim_(FLAC__StreamDecoder *decoder, unsigned channel, unsigned bps, FLAC__bool do_full_decode);
102 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);
103 static FLAC__bool read_zero_padding_(FLAC__StreamDecoder *decoder);
104 static FLAC__bool read_callback_(FLAC__byte buffer[], size_t *bytes, void *client_data);
106 static FLAC__StreamDecoderReadStatus read_callback_ogg_aspect_(const FLAC__StreamDecoder *decoder, FLAC__byte buffer[], size_t *bytes);
107 static FLAC__OggDecoderAspectReadStatus read_callback_proxy_(const void *void_decoder, FLAC__byte buffer[], size_t *bytes, void *client_data);
109 static FLAC__StreamDecoderWriteStatus write_audio_frame_to_client_(FLAC__StreamDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 * const buffer[]);
110 static void send_error_to_client_(const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status);
111 static FLAC__bool seek_to_absolute_sample_(FLAC__StreamDecoder *decoder, FLAC__uint64 stream_length, FLAC__uint64 target_sample);
113 static FLAC__bool seek_to_absolute_sample_ogg_(FLAC__StreamDecoder *decoder, FLAC__uint64 stream_length, FLAC__uint64 target_sample);
115 static FLAC__StreamDecoderReadStatus file_read_callback_(const FLAC__StreamDecoder *decoder, FLAC__byte buffer[], size_t *bytes, void *client_data);
116 static FLAC__StreamDecoderSeekStatus file_seek_callback_(const FLAC__StreamDecoder *decoder, FLAC__uint64 absolute_byte_offset, void *client_data);
117 static FLAC__StreamDecoderTellStatus file_tell_callback_(const FLAC__StreamDecoder *decoder, FLAC__uint64 *absolute_byte_offset, void *client_data);
118 static FLAC__StreamDecoderLengthStatus file_length_callback_(const FLAC__StreamDecoder *decoder, FLAC__uint64 *stream_length, void *client_data);
119 static FLAC__bool file_eof_callback_(const FLAC__StreamDecoder *decoder, void *client_data);
121 /***********************************************************************
125 ***********************************************************************/
127 typedef struct FLAC__StreamDecoderPrivate {
131 FLAC__StreamDecoderReadCallback read_callback;
132 FLAC__StreamDecoderSeekCallback seek_callback;
133 FLAC__StreamDecoderTellCallback tell_callback;
134 FLAC__StreamDecoderLengthCallback length_callback;
135 FLAC__StreamDecoderEofCallback eof_callback;
136 FLAC__StreamDecoderWriteCallback write_callback;
137 FLAC__StreamDecoderMetadataCallback metadata_callback;
138 FLAC__StreamDecoderErrorCallback error_callback;
139 /* generic 32-bit datapath: */
140 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[]);
141 /* generic 64-bit datapath: */
142 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[]);
143 /* for use when the signal is <= 16 bits-per-sample, or <= 15 bits-per-sample on a side channel (which requires 1 extra bit): */
144 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[]);
145 /* 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: */
146 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[]);
147 FLAC__bool (*local_bitreader_read_rice_signed_block)(FLAC__BitReader *br, int vals[], unsigned nvals, unsigned parameter);
149 FILE *file; /* only used if FLAC__stream_decoder_init_file()/FLAC__stream_decoder_init_file() called, else NULL */
150 FLAC__BitReader *input;
151 FLAC__int32 *output[FLAC__MAX_CHANNELS];
152 FLAC__int32 *residual[FLAC__MAX_CHANNELS]; /* WATCHOUT: these are the aligned pointers; the real pointers that should be free()'d are residual_unaligned[] below */
153 FLAC__EntropyCodingMethod_PartitionedRiceContents partitioned_rice_contents[FLAC__MAX_CHANNELS];
154 unsigned output_capacity, output_channels;
155 FLAC__uint32 fixed_block_size, next_fixed_block_size;
156 FLAC__uint64 samples_decoded;
157 FLAC__bool has_stream_info, has_seek_table;
158 FLAC__StreamMetadata stream_info;
159 FLAC__StreamMetadata seek_table;
160 FLAC__bool metadata_filter[128]; /* MAGIC number 128 == total number of metadata block types == 1 << 7 */
161 FLAC__byte *metadata_filter_ids;
162 size_t metadata_filter_ids_count, metadata_filter_ids_capacity; /* units for both are IDs, not bytes */
164 FLAC__bool cached; /* true if there is a byte in lookahead */
165 FLAC__CPUInfo cpuinfo;
166 FLAC__byte header_warmup[2]; /* contains the sync code and reserved bits */
167 FLAC__byte lookahead; /* temp storage when we need to look ahead one byte in the stream */
168 /* unaligned (original) pointers to allocated data */
169 FLAC__int32 *residual_unaligned[FLAC__MAX_CHANNELS];
170 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 */
171 FLAC__bool internal_reset_hack; /* used only during init() so we can call reset to set up the decoder without rewinding the input */
172 FLAC__bool is_seeking;
173 FLAC__MD5Context md5context;
174 FLAC__byte computed_md5sum[16]; /* this is the sum we computed from the decoded data */
175 /* (the rest of these are only used for seeking) */
176 FLAC__Frame last_frame; /* holds the info of the last frame we seeked to */
177 FLAC__uint64 first_frame_offset; /* hint to the seek routine of where in the stream the first audio frame starts */
178 FLAC__uint64 target_sample;
179 unsigned unparseable_frame_count; /* used to tell whether we're decoding a future version of FLAC or just got a bad sync */
181 FLAC__bool got_a_frame; /* hack needed in Ogg FLAC seek routine to check when process_single() actually writes a frame */
183 } FLAC__StreamDecoderPrivate;
185 /***********************************************************************
187 * Public static class data
189 ***********************************************************************/
191 FLAC_API const char * const FLAC__StreamDecoderStateString[] = {
192 "FLAC__STREAM_DECODER_SEARCH_FOR_METADATA",
193 "FLAC__STREAM_DECODER_READ_METADATA",
194 "FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC",
195 "FLAC__STREAM_DECODER_READ_FRAME",
196 "FLAC__STREAM_DECODER_END_OF_STREAM",
197 "FLAC__STREAM_DECODER_OGG_ERROR",
198 "FLAC__STREAM_DECODER_SEEK_ERROR",
199 "FLAC__STREAM_DECODER_ABORTED",
200 "FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR",
201 "FLAC__STREAM_DECODER_UNINITIALIZED"
204 FLAC_API const char * const FLAC__StreamDecoderInitStatusString[] = {
205 "FLAC__STREAM_DECODER_INIT_STATUS_OK",
206 "FLAC__STREAM_DECODER_INIT_STATUS_UNSUPPORTED_CONTAINER",
207 "FLAC__STREAM_DECODER_INIT_STATUS_INVALID_CALLBACKS",
208 "FLAC__STREAM_DECODER_INIT_STATUS_MEMORY_ALLOCATION_ERROR",
209 "FLAC__STREAM_DECODER_INIT_STATUS_ERROR_OPENING_FILE",
210 "FLAC__STREAM_DECODER_INIT_STATUS_ALREADY_INITIALIZED"
213 FLAC_API const char * const FLAC__StreamDecoderReadStatusString[] = {
214 "FLAC__STREAM_DECODER_READ_STATUS_CONTINUE",
215 "FLAC__STREAM_DECODER_READ_STATUS_END_OF_STREAM",
216 "FLAC__STREAM_DECODER_READ_STATUS_ABORT"
219 FLAC_API const char * const FLAC__StreamDecoderSeekStatusString[] = {
220 "FLAC__STREAM_DECODER_SEEK_STATUS_OK",
221 "FLAC__STREAM_DECODER_SEEK_STATUS_ERROR",
222 "FLAC__STREAM_DECODER_SEEK_STATUS_UNSUPPORTED"
225 FLAC_API const char * const FLAC__StreamDecoderTellStatusString[] = {
226 "FLAC__STREAM_DECODER_TELL_STATUS_OK",
227 "FLAC__STREAM_DECODER_TELL_STATUS_ERROR",
228 "FLAC__STREAM_DECODER_TELL_STATUS_UNSUPPORTED"
231 FLAC_API const char * const FLAC__StreamDecoderLengthStatusString[] = {
232 "FLAC__STREAM_DECODER_LENGTH_STATUS_OK",
233 "FLAC__STREAM_DECODER_LENGTH_STATUS_ERROR",
234 "FLAC__STREAM_DECODER_LENGTH_STATUS_UNSUPPORTED"
237 FLAC_API const char * const FLAC__StreamDecoderWriteStatusString[] = {
238 "FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE",
239 "FLAC__STREAM_DECODER_WRITE_STATUS_ABORT"
242 FLAC_API const char * const FLAC__StreamDecoderErrorStatusString[] = {
243 "FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC",
244 "FLAC__STREAM_DECODER_ERROR_STATUS_BAD_HEADER",
245 "FLAC__STREAM_DECODER_ERROR_STATUS_FRAME_CRC_MISMATCH",
246 "FLAC__STREAM_DECODER_ERROR_STATUS_UNPARSEABLE_STREAM"
249 /***********************************************************************
251 * Class constructor/destructor
253 ***********************************************************************/
254 FLAC_API FLAC__StreamDecoder *FLAC__stream_decoder_new(void)
256 FLAC__StreamDecoder *decoder;
259 FLAC__ASSERT(sizeof(int) >= 4); /* we want to die right away if this is not true */
261 decoder = calloc(1, sizeof(FLAC__StreamDecoder));
266 decoder->protected_ = calloc(1, sizeof(FLAC__StreamDecoderProtected));
267 if(decoder->protected_ == 0) {
272 decoder->private_ = calloc(1, sizeof(FLAC__StreamDecoderPrivate));
273 if(decoder->private_ == 0) {
274 free(decoder->protected_);
279 decoder->private_->input = FLAC__bitreader_new();
280 if(decoder->private_->input == 0) {
281 free(decoder->private_);
282 free(decoder->protected_);
287 decoder->private_->metadata_filter_ids_capacity = 16;
288 if(0 == (decoder->private_->metadata_filter_ids = malloc((FLAC__STREAM_METADATA_APPLICATION_ID_LEN/8) * decoder->private_->metadata_filter_ids_capacity))) {
289 FLAC__bitreader_delete(decoder->private_->input);
290 free(decoder->private_);
291 free(decoder->protected_);
296 for(i = 0; i < FLAC__MAX_CHANNELS; i++) {
297 decoder->private_->output[i] = 0;
298 decoder->private_->residual_unaligned[i] = decoder->private_->residual[i] = 0;
301 decoder->private_->output_capacity = 0;
302 decoder->private_->output_channels = 0;
303 decoder->private_->has_seek_table = false;
305 for(i = 0; i < FLAC__MAX_CHANNELS; i++)
306 FLAC__format_entropy_coding_method_partitioned_rice_contents_init(&decoder->private_->partitioned_rice_contents[i]);
308 decoder->private_->file = 0;
310 set_defaults_(decoder);
312 decoder->protected_->state = FLAC__STREAM_DECODER_UNINITIALIZED;
317 FLAC_API void FLAC__stream_decoder_delete(FLAC__StreamDecoder *decoder)
324 FLAC__ASSERT(0 != decoder->protected_);
325 FLAC__ASSERT(0 != decoder->private_);
326 FLAC__ASSERT(0 != decoder->private_->input);
328 (void)FLAC__stream_decoder_finish(decoder);
330 if(0 != decoder->private_->metadata_filter_ids)
331 free(decoder->private_->metadata_filter_ids);
333 FLAC__bitreader_delete(decoder->private_->input);
335 for(i = 0; i < FLAC__MAX_CHANNELS; i++)
336 FLAC__format_entropy_coding_method_partitioned_rice_contents_clear(&decoder->private_->partitioned_rice_contents[i]);
338 free(decoder->private_);
339 free(decoder->protected_);
343 /***********************************************************************
345 * Public class methods
347 ***********************************************************************/
349 static FLAC__StreamDecoderInitStatus init_stream_internal_(
350 FLAC__StreamDecoder *decoder,
351 FLAC__StreamDecoderReadCallback read_callback,
352 FLAC__StreamDecoderSeekCallback seek_callback,
353 FLAC__StreamDecoderTellCallback tell_callback,
354 FLAC__StreamDecoderLengthCallback length_callback,
355 FLAC__StreamDecoderEofCallback eof_callback,
356 FLAC__StreamDecoderWriteCallback write_callback,
357 FLAC__StreamDecoderMetadataCallback metadata_callback,
358 FLAC__StreamDecoderErrorCallback error_callback,
363 FLAC__ASSERT(0 != decoder);
365 if(decoder->protected_->state != FLAC__STREAM_DECODER_UNINITIALIZED)
366 return FLAC__STREAM_DECODER_INIT_STATUS_ALREADY_INITIALIZED;
370 return FLAC__STREAM_DECODER_INIT_STATUS_UNSUPPORTED_CONTAINER;
374 0 == read_callback ||
375 0 == write_callback ||
376 0 == error_callback ||
377 (seek_callback && (0 == tell_callback || 0 == length_callback || 0 == eof_callback))
379 return FLAC__STREAM_DECODER_INIT_STATUS_INVALID_CALLBACKS;
382 decoder->private_->is_ogg = is_ogg;
383 if(is_ogg && !FLAC__ogg_decoder_aspect_init(&decoder->protected_->ogg_decoder_aspect))
384 return decoder->protected_->state = FLAC__STREAM_DECODER_OGG_ERROR;
388 * get the CPU info and set the function pointers
390 FLAC__cpu_info(&decoder->private_->cpuinfo);
391 /* first default to the non-asm routines */
392 decoder->private_->local_lpc_restore_signal = FLAC__lpc_restore_signal;
393 decoder->private_->local_lpc_restore_signal_64bit = FLAC__lpc_restore_signal_wide;
394 decoder->private_->local_lpc_restore_signal_16bit = FLAC__lpc_restore_signal;
395 decoder->private_->local_lpc_restore_signal_16bit_order8 = FLAC__lpc_restore_signal;
396 decoder->private_->local_bitreader_read_rice_signed_block = FLAC__bitreader_read_rice_signed_block;
397 /* now override with asm where appropriate */
399 if(decoder->private_->cpuinfo.use_asm) {
400 #ifdef FLAC__CPU_IA32
401 FLAC__ASSERT(decoder->private_->cpuinfo.type == FLAC__CPUINFO_TYPE_IA32);
402 #ifdef FLAC__HAS_NASM
403 #if 1 /*@@@@@@ OPT: not clearly faster, needs more testing */
404 if(decoder->private_->cpuinfo.data.ia32.bswap)
405 decoder->private_->local_bitreader_read_rice_signed_block = FLAC__bitreader_read_rice_signed_block_asm_ia32_bswap;
407 if(decoder->private_->cpuinfo.data.ia32.mmx) {
408 decoder->private_->local_lpc_restore_signal = FLAC__lpc_restore_signal_asm_ia32;
409 decoder->private_->local_lpc_restore_signal_16bit = FLAC__lpc_restore_signal_asm_ia32_mmx;
410 decoder->private_->local_lpc_restore_signal_16bit_order8 = FLAC__lpc_restore_signal_asm_ia32_mmx;
413 decoder->private_->local_lpc_restore_signal = FLAC__lpc_restore_signal_asm_ia32;
414 decoder->private_->local_lpc_restore_signal_16bit = FLAC__lpc_restore_signal_asm_ia32;
415 decoder->private_->local_lpc_restore_signal_16bit_order8 = FLAC__lpc_restore_signal_asm_ia32;
418 #elif defined FLAC__CPU_PPC
419 FLAC__ASSERT(decoder->private_->cpuinfo.type == FLAC__CPUINFO_TYPE_PPC);
420 if(decoder->private_->cpuinfo.data.ppc.altivec) {
421 decoder->private_->local_lpc_restore_signal_16bit = FLAC__lpc_restore_signal_asm_ppc_altivec_16;
422 decoder->private_->local_lpc_restore_signal_16bit_order8 = FLAC__lpc_restore_signal_asm_ppc_altivec_16_order8;
428 /* from here on, errors are fatal */
430 if(!FLAC__bitreader_init(decoder->private_->input, decoder->private_->cpuinfo, read_callback_, decoder)) {
431 decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
432 return FLAC__STREAM_DECODER_INIT_STATUS_MEMORY_ALLOCATION_ERROR;
435 decoder->private_->read_callback = read_callback;
436 decoder->private_->seek_callback = seek_callback;
437 decoder->private_->tell_callback = tell_callback;
438 decoder->private_->length_callback = length_callback;
439 decoder->private_->eof_callback = eof_callback;
440 decoder->private_->write_callback = write_callback;
441 decoder->private_->metadata_callback = metadata_callback;
442 decoder->private_->error_callback = error_callback;
443 decoder->private_->client_data = client_data;
444 decoder->private_->fixed_block_size = decoder->private_->next_fixed_block_size = 0;
445 decoder->private_->samples_decoded = 0;
446 decoder->private_->has_stream_info = false;
447 decoder->private_->cached = false;
449 decoder->private_->do_md5_checking = decoder->protected_->md5_checking;
450 decoder->private_->is_seeking = false;
452 decoder->private_->internal_reset_hack = true; /* so the following reset does not try to rewind the input */
453 if(!FLAC__stream_decoder_reset(decoder)) {
454 /* above call sets the state for us */
455 return FLAC__STREAM_DECODER_INIT_STATUS_MEMORY_ALLOCATION_ERROR;
458 return FLAC__STREAM_DECODER_INIT_STATUS_OK;
461 FLAC_API FLAC__StreamDecoderInitStatus FLAC__stream_decoder_init_stream(
462 FLAC__StreamDecoder *decoder,
463 FLAC__StreamDecoderReadCallback read_callback,
464 FLAC__StreamDecoderSeekCallback seek_callback,
465 FLAC__StreamDecoderTellCallback tell_callback,
466 FLAC__StreamDecoderLengthCallback length_callback,
467 FLAC__StreamDecoderEofCallback eof_callback,
468 FLAC__StreamDecoderWriteCallback write_callback,
469 FLAC__StreamDecoderMetadataCallback metadata_callback,
470 FLAC__StreamDecoderErrorCallback error_callback,
474 return init_stream_internal_(
489 FLAC_API FLAC__StreamDecoderInitStatus FLAC__stream_decoder_init_ogg_stream(
490 FLAC__StreamDecoder *decoder,
491 FLAC__StreamDecoderReadCallback read_callback,
492 FLAC__StreamDecoderSeekCallback seek_callback,
493 FLAC__StreamDecoderTellCallback tell_callback,
494 FLAC__StreamDecoderLengthCallback length_callback,
495 FLAC__StreamDecoderEofCallback eof_callback,
496 FLAC__StreamDecoderWriteCallback write_callback,
497 FLAC__StreamDecoderMetadataCallback metadata_callback,
498 FLAC__StreamDecoderErrorCallback error_callback,
502 return init_stream_internal_(
517 static FLAC__StreamDecoderInitStatus init_FILE_internal_(
518 FLAC__StreamDecoder *decoder,
520 FLAC__StreamDecoderWriteCallback write_callback,
521 FLAC__StreamDecoderMetadataCallback metadata_callback,
522 FLAC__StreamDecoderErrorCallback error_callback,
527 FLAC__ASSERT(0 != decoder);
528 FLAC__ASSERT(0 != file);
530 if(decoder->protected_->state != FLAC__STREAM_DECODER_UNINITIALIZED)
531 return decoder->protected_->state = FLAC__STREAM_DECODER_INIT_STATUS_ALREADY_INITIALIZED;
533 if(0 == write_callback || 0 == error_callback)
534 return decoder->protected_->state = FLAC__STREAM_DECODER_INIT_STATUS_INVALID_CALLBACKS;
537 * To make sure that our file does not go unclosed after an error, we
538 * must assign the FILE pointer before any further error can occur in
542 file = get_binary_stdin_(); /* just to be safe */
544 decoder->private_->file = file;
546 return init_stream_internal_(
549 decoder->private_->file == stdin? 0: file_seek_callback_,
550 decoder->private_->file == stdin? 0: file_tell_callback_,
551 decoder->private_->file == stdin? 0: file_length_callback_,
561 FLAC_API FLAC__StreamDecoderInitStatus FLAC__stream_decoder_init_FILE(
562 FLAC__StreamDecoder *decoder,
564 FLAC__StreamDecoderWriteCallback write_callback,
565 FLAC__StreamDecoderMetadataCallback metadata_callback,
566 FLAC__StreamDecoderErrorCallback error_callback,
570 return init_FILE_internal_(decoder, file, write_callback, metadata_callback, error_callback, client_data, /*is_ogg=*/false);
573 FLAC_API FLAC__StreamDecoderInitStatus FLAC__stream_decoder_init_ogg_FILE(
574 FLAC__StreamDecoder *decoder,
576 FLAC__StreamDecoderWriteCallback write_callback,
577 FLAC__StreamDecoderMetadataCallback metadata_callback,
578 FLAC__StreamDecoderErrorCallback error_callback,
582 return init_FILE_internal_(decoder, file, write_callback, metadata_callback, error_callback, client_data, /*is_ogg=*/true);
585 static FLAC__StreamDecoderInitStatus init_file_internal_(
586 FLAC__StreamDecoder *decoder,
587 const char *filename,
588 FLAC__StreamDecoderWriteCallback write_callback,
589 FLAC__StreamDecoderMetadataCallback metadata_callback,
590 FLAC__StreamDecoderErrorCallback error_callback,
597 FLAC__ASSERT(0 != decoder);
600 * To make sure that our file does not go unclosed after an error, we
601 * have to do the same entrance checks here that are later performed
602 * in FLAC__stream_decoder_init_FILE() before the FILE* is assigned.
604 if(decoder->protected_->state != FLAC__STREAM_DECODER_UNINITIALIZED)
605 return decoder->protected_->state = FLAC__STREAM_DECODER_INIT_STATUS_ALREADY_INITIALIZED;
607 if(0 == write_callback || 0 == error_callback)
608 return decoder->protected_->state = FLAC__STREAM_DECODER_INIT_STATUS_INVALID_CALLBACKS;
610 file = filename? flac_fopen(filename, "rb") : stdin;
613 return FLAC__STREAM_DECODER_INIT_STATUS_ERROR_OPENING_FILE;
615 return init_FILE_internal_(decoder, file, write_callback, metadata_callback, error_callback, client_data, is_ogg);
618 FLAC_API FLAC__StreamDecoderInitStatus FLAC__stream_decoder_init_file(
619 FLAC__StreamDecoder *decoder,
620 const char *filename,
621 FLAC__StreamDecoderWriteCallback write_callback,
622 FLAC__StreamDecoderMetadataCallback metadata_callback,
623 FLAC__StreamDecoderErrorCallback error_callback,
627 return init_file_internal_(decoder, filename, write_callback, metadata_callback, error_callback, client_data, /*is_ogg=*/false);
630 FLAC_API FLAC__StreamDecoderInitStatus FLAC__stream_decoder_init_ogg_file(
631 FLAC__StreamDecoder *decoder,
632 const char *filename,
633 FLAC__StreamDecoderWriteCallback write_callback,
634 FLAC__StreamDecoderMetadataCallback metadata_callback,
635 FLAC__StreamDecoderErrorCallback error_callback,
639 return init_file_internal_(decoder, filename, write_callback, metadata_callback, error_callback, client_data, /*is_ogg=*/true);
642 FLAC_API FLAC__bool FLAC__stream_decoder_finish(FLAC__StreamDecoder *decoder)
644 FLAC__bool md5_failed = false;
647 FLAC__ASSERT(0 != decoder);
648 FLAC__ASSERT(0 != decoder->private_);
649 FLAC__ASSERT(0 != decoder->protected_);
651 if(decoder->protected_->state == FLAC__STREAM_DECODER_UNINITIALIZED)
654 /* see the comment in FLAC__seekable_stream_decoder_reset() as to why we
655 * always call FLAC__MD5Final()
657 FLAC__MD5Final(decoder->private_->computed_md5sum, &decoder->private_->md5context);
659 if(decoder->private_->has_seek_table && 0 != decoder->private_->seek_table.data.seek_table.points) {
660 free(decoder->private_->seek_table.data.seek_table.points);
661 decoder->private_->seek_table.data.seek_table.points = 0;
662 decoder->private_->has_seek_table = false;
664 FLAC__bitreader_free(decoder->private_->input);
665 for(i = 0; i < FLAC__MAX_CHANNELS; i++) {
667 * FLAC__lpc_restore_signal_asm_ia32_mmx() requires that the
668 * output arrays have a buffer of up to 3 zeroes in front
669 * (at negative indices) for alignment purposes; we use 4
670 * to keep the data well-aligned.
672 if(0 != decoder->private_->output[i]) {
673 free(decoder->private_->output[i]-4);
674 decoder->private_->output[i] = 0;
676 if(0 != decoder->private_->residual_unaligned[i]) {
677 free(decoder->private_->residual_unaligned[i]);
678 decoder->private_->residual_unaligned[i] = decoder->private_->residual[i] = 0;
681 decoder->private_->output_capacity = 0;
682 decoder->private_->output_channels = 0;
685 if(decoder->private_->is_ogg)
686 FLAC__ogg_decoder_aspect_finish(&decoder->protected_->ogg_decoder_aspect);
689 if(0 != decoder->private_->file) {
690 if(decoder->private_->file != stdin)
691 fclose(decoder->private_->file);
692 decoder->private_->file = 0;
695 if(decoder->private_->do_md5_checking) {
696 if(memcmp(decoder->private_->stream_info.data.stream_info.md5sum, decoder->private_->computed_md5sum, 16))
699 decoder->private_->is_seeking = false;
701 set_defaults_(decoder);
703 decoder->protected_->state = FLAC__STREAM_DECODER_UNINITIALIZED;
708 FLAC_API FLAC__bool FLAC__stream_decoder_set_ogg_serial_number(FLAC__StreamDecoder *decoder, long value)
710 FLAC__ASSERT(0 != decoder);
711 FLAC__ASSERT(0 != decoder->private_);
712 FLAC__ASSERT(0 != decoder->protected_);
713 if(decoder->protected_->state != FLAC__STREAM_DECODER_UNINITIALIZED)
716 /* can't check decoder->private_->is_ogg since that's not set until init time */
717 FLAC__ogg_decoder_aspect_set_serial_number(&decoder->protected_->ogg_decoder_aspect, value);
725 FLAC_API FLAC__bool FLAC__stream_decoder_set_md5_checking(FLAC__StreamDecoder *decoder, FLAC__bool value)
727 FLAC__ASSERT(0 != decoder);
728 FLAC__ASSERT(0 != decoder->protected_);
729 if(decoder->protected_->state != FLAC__STREAM_DECODER_UNINITIALIZED)
731 decoder->protected_->md5_checking = value;
735 FLAC_API FLAC__bool FLAC__stream_decoder_set_metadata_respond(FLAC__StreamDecoder *decoder, FLAC__MetadataType type)
737 FLAC__ASSERT(0 != decoder);
738 FLAC__ASSERT(0 != decoder->private_);
739 FLAC__ASSERT(0 != decoder->protected_);
740 FLAC__ASSERT((unsigned)type <= FLAC__MAX_METADATA_TYPE_CODE);
741 /* double protection */
742 if((unsigned)type > FLAC__MAX_METADATA_TYPE_CODE)
744 if(decoder->protected_->state != FLAC__STREAM_DECODER_UNINITIALIZED)
746 decoder->private_->metadata_filter[type] = true;
747 if(type == FLAC__METADATA_TYPE_APPLICATION)
748 decoder->private_->metadata_filter_ids_count = 0;
752 FLAC_API FLAC__bool FLAC__stream_decoder_set_metadata_respond_application(FLAC__StreamDecoder *decoder, const FLAC__byte id[4])
754 FLAC__ASSERT(0 != decoder);
755 FLAC__ASSERT(0 != decoder->private_);
756 FLAC__ASSERT(0 != decoder->protected_);
757 FLAC__ASSERT(0 != id);
758 if(decoder->protected_->state != FLAC__STREAM_DECODER_UNINITIALIZED)
761 if(decoder->private_->metadata_filter[FLAC__METADATA_TYPE_APPLICATION])
764 FLAC__ASSERT(0 != decoder->private_->metadata_filter_ids);
766 if(decoder->private_->metadata_filter_ids_count == decoder->private_->metadata_filter_ids_capacity) {
767 if(0 == (decoder->private_->metadata_filter_ids = safe_realloc_mul_2op_(decoder->private_->metadata_filter_ids, decoder->private_->metadata_filter_ids_capacity, /*times*/2))) {
768 decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
771 decoder->private_->metadata_filter_ids_capacity *= 2;
774 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));
775 decoder->private_->metadata_filter_ids_count++;
780 FLAC_API FLAC__bool FLAC__stream_decoder_set_metadata_respond_all(FLAC__StreamDecoder *decoder)
783 FLAC__ASSERT(0 != decoder);
784 FLAC__ASSERT(0 != decoder->private_);
785 FLAC__ASSERT(0 != decoder->protected_);
786 if(decoder->protected_->state != FLAC__STREAM_DECODER_UNINITIALIZED)
788 for(i = 0; i < sizeof(decoder->private_->metadata_filter) / sizeof(decoder->private_->metadata_filter[0]); i++)
789 decoder->private_->metadata_filter[i] = true;
790 decoder->private_->metadata_filter_ids_count = 0;
794 FLAC_API FLAC__bool FLAC__stream_decoder_set_metadata_ignore(FLAC__StreamDecoder *decoder, FLAC__MetadataType type)
796 FLAC__ASSERT(0 != decoder);
797 FLAC__ASSERT(0 != decoder->private_);
798 FLAC__ASSERT(0 != decoder->protected_);
799 FLAC__ASSERT((unsigned)type <= FLAC__MAX_METADATA_TYPE_CODE);
800 /* double protection */
801 if((unsigned)type > FLAC__MAX_METADATA_TYPE_CODE)
803 if(decoder->protected_->state != FLAC__STREAM_DECODER_UNINITIALIZED)
805 decoder->private_->metadata_filter[type] = false;
806 if(type == FLAC__METADATA_TYPE_APPLICATION)
807 decoder->private_->metadata_filter_ids_count = 0;
811 FLAC_API FLAC__bool FLAC__stream_decoder_set_metadata_ignore_application(FLAC__StreamDecoder *decoder, const FLAC__byte id[4])
813 FLAC__ASSERT(0 != decoder);
814 FLAC__ASSERT(0 != decoder->private_);
815 FLAC__ASSERT(0 != decoder->protected_);
816 FLAC__ASSERT(0 != id);
817 if(decoder->protected_->state != FLAC__STREAM_DECODER_UNINITIALIZED)
820 if(!decoder->private_->metadata_filter[FLAC__METADATA_TYPE_APPLICATION])
823 FLAC__ASSERT(0 != decoder->private_->metadata_filter_ids);
825 if(decoder->private_->metadata_filter_ids_count == decoder->private_->metadata_filter_ids_capacity) {
826 if(0 == (decoder->private_->metadata_filter_ids = safe_realloc_mul_2op_(decoder->private_->metadata_filter_ids, decoder->private_->metadata_filter_ids_capacity, /*times*/2))) {
827 decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
830 decoder->private_->metadata_filter_ids_capacity *= 2;
833 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));
834 decoder->private_->metadata_filter_ids_count++;
839 FLAC_API FLAC__bool FLAC__stream_decoder_set_metadata_ignore_all(FLAC__StreamDecoder *decoder)
841 FLAC__ASSERT(0 != decoder);
842 FLAC__ASSERT(0 != decoder->private_);
843 FLAC__ASSERT(0 != decoder->protected_);
844 if(decoder->protected_->state != FLAC__STREAM_DECODER_UNINITIALIZED)
846 memset(decoder->private_->metadata_filter, 0, sizeof(decoder->private_->metadata_filter));
847 decoder->private_->metadata_filter_ids_count = 0;
851 FLAC_API FLAC__StreamDecoderState FLAC__stream_decoder_get_state(const FLAC__StreamDecoder *decoder)
853 FLAC__ASSERT(0 != decoder);
854 FLAC__ASSERT(0 != decoder->protected_);
855 return decoder->protected_->state;
858 FLAC_API const char *FLAC__stream_decoder_get_resolved_state_string(const FLAC__StreamDecoder *decoder)
860 return FLAC__StreamDecoderStateString[decoder->protected_->state];
863 FLAC_API FLAC__bool FLAC__stream_decoder_get_md5_checking(const FLAC__StreamDecoder *decoder)
865 FLAC__ASSERT(0 != decoder);
866 FLAC__ASSERT(0 != decoder->protected_);
867 return decoder->protected_->md5_checking;
870 FLAC_API FLAC__uint64 FLAC__stream_decoder_get_total_samples(const FLAC__StreamDecoder *decoder)
872 FLAC__ASSERT(0 != decoder);
873 FLAC__ASSERT(0 != decoder->protected_);
874 return decoder->private_->has_stream_info? decoder->private_->stream_info.data.stream_info.total_samples : 0;
877 FLAC_API unsigned FLAC__stream_decoder_get_channels(const FLAC__StreamDecoder *decoder)
879 FLAC__ASSERT(0 != decoder);
880 FLAC__ASSERT(0 != decoder->protected_);
881 return decoder->protected_->channels;
884 FLAC_API FLAC__ChannelAssignment FLAC__stream_decoder_get_channel_assignment(const FLAC__StreamDecoder *decoder)
886 FLAC__ASSERT(0 != decoder);
887 FLAC__ASSERT(0 != decoder->protected_);
888 return decoder->protected_->channel_assignment;
891 FLAC_API unsigned FLAC__stream_decoder_get_bits_per_sample(const FLAC__StreamDecoder *decoder)
893 FLAC__ASSERT(0 != decoder);
894 FLAC__ASSERT(0 != decoder->protected_);
895 return decoder->protected_->bits_per_sample;
898 FLAC_API unsigned FLAC__stream_decoder_get_sample_rate(const FLAC__StreamDecoder *decoder)
900 FLAC__ASSERT(0 != decoder);
901 FLAC__ASSERT(0 != decoder->protected_);
902 return decoder->protected_->sample_rate;
905 FLAC_API unsigned FLAC__stream_decoder_get_blocksize(const FLAC__StreamDecoder *decoder)
907 FLAC__ASSERT(0 != decoder);
908 FLAC__ASSERT(0 != decoder->protected_);
909 return decoder->protected_->blocksize;
912 FLAC_API FLAC__bool FLAC__stream_decoder_get_decode_position(const FLAC__StreamDecoder *decoder, FLAC__uint64 *position)
914 FLAC__ASSERT(0 != decoder);
915 FLAC__ASSERT(0 != decoder->private_);
916 FLAC__ASSERT(0 != position);
919 if(decoder->private_->is_ogg)
922 if(0 == decoder->private_->tell_callback)
924 if(decoder->private_->tell_callback(decoder, position, decoder->private_->client_data) != FLAC__STREAM_DECODER_TELL_STATUS_OK)
926 /* should never happen since all FLAC frames and metadata blocks are byte aligned, but check just in case */
927 if(!FLAC__bitreader_is_consumed_byte_aligned(decoder->private_->input))
929 FLAC__ASSERT(*position >= FLAC__stream_decoder_get_input_bytes_unconsumed(decoder));
930 *position -= FLAC__stream_decoder_get_input_bytes_unconsumed(decoder);
934 FLAC_API FLAC__bool FLAC__stream_decoder_flush(FLAC__StreamDecoder *decoder)
936 FLAC__ASSERT(0 != decoder);
937 FLAC__ASSERT(0 != decoder->private_);
938 FLAC__ASSERT(0 != decoder->protected_);
940 decoder->private_->samples_decoded = 0;
941 decoder->private_->do_md5_checking = false;
944 if(decoder->private_->is_ogg)
945 FLAC__ogg_decoder_aspect_flush(&decoder->protected_->ogg_decoder_aspect);
948 if(!FLAC__bitreader_clear(decoder->private_->input)) {
949 decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
952 decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
957 FLAC_API FLAC__bool FLAC__stream_decoder_reset(FLAC__StreamDecoder *decoder)
959 FLAC__ASSERT(0 != decoder);
960 FLAC__ASSERT(0 != decoder->private_);
961 FLAC__ASSERT(0 != decoder->protected_);
963 if(!FLAC__stream_decoder_flush(decoder)) {
964 /* above call sets the state for us */
969 /*@@@ could go in !internal_reset_hack block below */
970 if(decoder->private_->is_ogg)
971 FLAC__ogg_decoder_aspect_reset(&decoder->protected_->ogg_decoder_aspect);
974 /* Rewind if necessary. If FLAC__stream_decoder_init() is calling us,
975 * (internal_reset_hack) don't try to rewind since we are already at
976 * the beginning of the stream and don't want to fail if the input is
979 if(!decoder->private_->internal_reset_hack) {
980 if(decoder->private_->file == stdin)
981 return false; /* can't rewind stdin, reset fails */
982 if(decoder->private_->seek_callback && decoder->private_->seek_callback(decoder, 0, decoder->private_->client_data) == FLAC__STREAM_DECODER_SEEK_STATUS_ERROR)
983 return false; /* seekable and seek fails, reset fails */
986 decoder->private_->internal_reset_hack = false;
988 decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_METADATA;
990 decoder->private_->has_stream_info = false;
991 if(decoder->private_->has_seek_table && 0 != decoder->private_->seek_table.data.seek_table.points) {
992 free(decoder->private_->seek_table.data.seek_table.points);
993 decoder->private_->seek_table.data.seek_table.points = 0;
994 decoder->private_->has_seek_table = false;
996 decoder->private_->do_md5_checking = decoder->protected_->md5_checking;
998 * This goes in reset() and not flush() because according to the spec, a
999 * fixed-blocksize stream must stay that way through the whole stream.
1001 decoder->private_->fixed_block_size = decoder->private_->next_fixed_block_size = 0;
1003 /* We initialize the FLAC__MD5Context even though we may never use it. This
1004 * is because md5 checking may be turned on to start and then turned off if
1005 * a seek occurs. So we init the context here and finalize it in
1006 * FLAC__stream_decoder_finish() to make sure things are always cleaned up
1009 FLAC__MD5Init(&decoder->private_->md5context);
1011 decoder->private_->first_frame_offset = 0;
1012 decoder->private_->unparseable_frame_count = 0;
1017 FLAC_API FLAC__bool FLAC__stream_decoder_process_single(FLAC__StreamDecoder *decoder)
1019 FLAC__bool got_a_frame;
1020 FLAC__ASSERT(0 != decoder);
1021 FLAC__ASSERT(0 != decoder->protected_);
1024 switch(decoder->protected_->state) {
1025 case FLAC__STREAM_DECODER_SEARCH_FOR_METADATA:
1026 if(!find_metadata_(decoder))
1027 return false; /* above function sets the status for us */
1029 case FLAC__STREAM_DECODER_READ_METADATA:
1030 if(!read_metadata_(decoder))
1031 return false; /* above function sets the status for us */
1034 case FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC:
1035 if(!frame_sync_(decoder))
1036 return true; /* above function sets the status for us */
1038 case FLAC__STREAM_DECODER_READ_FRAME:
1039 if(!read_frame_(decoder, &got_a_frame, /*do_full_decode=*/true))
1040 return false; /* above function sets the status for us */
1042 return true; /* above function sets the status for us */
1044 case FLAC__STREAM_DECODER_END_OF_STREAM:
1045 case FLAC__STREAM_DECODER_ABORTED:
1054 FLAC_API FLAC__bool FLAC__stream_decoder_process_until_end_of_metadata(FLAC__StreamDecoder *decoder)
1056 FLAC__ASSERT(0 != decoder);
1057 FLAC__ASSERT(0 != decoder->protected_);
1060 switch(decoder->protected_->state) {
1061 case FLAC__STREAM_DECODER_SEARCH_FOR_METADATA:
1062 if(!find_metadata_(decoder))
1063 return false; /* above function sets the status for us */
1065 case FLAC__STREAM_DECODER_READ_METADATA:
1066 if(!read_metadata_(decoder))
1067 return false; /* above function sets the status for us */
1069 case FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC:
1070 case FLAC__STREAM_DECODER_READ_FRAME:
1071 case FLAC__STREAM_DECODER_END_OF_STREAM:
1072 case FLAC__STREAM_DECODER_ABORTED:
1081 FLAC_API FLAC__bool FLAC__stream_decoder_process_until_end_of_stream(FLAC__StreamDecoder *decoder)
1084 FLAC__ASSERT(0 != decoder);
1085 FLAC__ASSERT(0 != decoder->protected_);
1088 switch(decoder->protected_->state) {
1089 case FLAC__STREAM_DECODER_SEARCH_FOR_METADATA:
1090 if(!find_metadata_(decoder))
1091 return false; /* above function sets the status for us */
1093 case FLAC__STREAM_DECODER_READ_METADATA:
1094 if(!read_metadata_(decoder))
1095 return false; /* above function sets the status for us */
1097 case FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC:
1098 if(!frame_sync_(decoder))
1099 return true; /* above function sets the status for us */
1101 case FLAC__STREAM_DECODER_READ_FRAME:
1102 if(!read_frame_(decoder, &dummy, /*do_full_decode=*/true))
1103 return false; /* above function sets the status for us */
1105 case FLAC__STREAM_DECODER_END_OF_STREAM:
1106 case FLAC__STREAM_DECODER_ABORTED:
1115 FLAC_API FLAC__bool FLAC__stream_decoder_skip_single_frame(FLAC__StreamDecoder *decoder)
1117 FLAC__bool got_a_frame;
1118 FLAC__ASSERT(0 != decoder);
1119 FLAC__ASSERT(0 != decoder->protected_);
1122 switch(decoder->protected_->state) {
1123 case FLAC__STREAM_DECODER_SEARCH_FOR_METADATA:
1124 case FLAC__STREAM_DECODER_READ_METADATA:
1125 return false; /* above function sets the status for us */
1126 case FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC:
1127 if(!frame_sync_(decoder))
1128 return true; /* above function sets the status for us */
1130 case FLAC__STREAM_DECODER_READ_FRAME:
1131 if(!read_frame_(decoder, &got_a_frame, /*do_full_decode=*/false))
1132 return false; /* above function sets the status for us */
1134 return true; /* above function sets the status for us */
1136 case FLAC__STREAM_DECODER_END_OF_STREAM:
1137 case FLAC__STREAM_DECODER_ABORTED:
1146 FLAC_API FLAC__bool FLAC__stream_decoder_seek_absolute(FLAC__StreamDecoder *decoder, FLAC__uint64 sample)
1148 FLAC__uint64 length;
1150 FLAC__ASSERT(0 != decoder);
1153 decoder->protected_->state != FLAC__STREAM_DECODER_SEARCH_FOR_METADATA &&
1154 decoder->protected_->state != FLAC__STREAM_DECODER_READ_METADATA &&
1155 decoder->protected_->state != FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC &&
1156 decoder->protected_->state != FLAC__STREAM_DECODER_READ_FRAME &&
1157 decoder->protected_->state != FLAC__STREAM_DECODER_END_OF_STREAM
1161 if(0 == decoder->private_->seek_callback)
1164 FLAC__ASSERT(decoder->private_->seek_callback);
1165 FLAC__ASSERT(decoder->private_->tell_callback);
1166 FLAC__ASSERT(decoder->private_->length_callback);
1167 FLAC__ASSERT(decoder->private_->eof_callback);
1169 if(FLAC__stream_decoder_get_total_samples(decoder) > 0 && sample >= FLAC__stream_decoder_get_total_samples(decoder))
1172 decoder->private_->is_seeking = true;
1174 /* turn off md5 checking if a seek is attempted */
1175 decoder->private_->do_md5_checking = false;
1177 /* 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) */
1178 if(decoder->private_->length_callback(decoder, &length, decoder->private_->client_data) != FLAC__STREAM_DECODER_LENGTH_STATUS_OK) {
1179 decoder->private_->is_seeking = false;
1183 /* if we haven't finished processing the metadata yet, do that so we have the STREAMINFO, SEEK_TABLE, and first_frame_offset */
1185 decoder->protected_->state == FLAC__STREAM_DECODER_SEARCH_FOR_METADATA ||
1186 decoder->protected_->state == FLAC__STREAM_DECODER_READ_METADATA
1188 if(!FLAC__stream_decoder_process_until_end_of_metadata(decoder)) {
1189 /* above call sets the state for us */
1190 decoder->private_->is_seeking = false;
1193 /* check this again in case we didn't know total_samples the first time */
1194 if(FLAC__stream_decoder_get_total_samples(decoder) > 0 && sample >= FLAC__stream_decoder_get_total_samples(decoder)) {
1195 decoder->private_->is_seeking = false;
1201 const FLAC__bool ok =
1203 decoder->private_->is_ogg?
1204 seek_to_absolute_sample_ogg_(decoder, length, sample) :
1206 seek_to_absolute_sample_(decoder, length, sample)
1208 decoder->private_->is_seeking = false;
1213 /***********************************************************************
1215 * Protected class methods
1217 ***********************************************************************/
1219 unsigned FLAC__stream_decoder_get_input_bytes_unconsumed(const FLAC__StreamDecoder *decoder)
1221 FLAC__ASSERT(0 != decoder);
1222 FLAC__ASSERT(FLAC__bitreader_is_consumed_byte_aligned(decoder->private_->input));
1223 FLAC__ASSERT(!(FLAC__bitreader_get_input_bits_unconsumed(decoder->private_->input) & 7));
1224 return FLAC__bitreader_get_input_bits_unconsumed(decoder->private_->input) / 8;
1227 /***********************************************************************
1229 * Private class methods
1231 ***********************************************************************/
1233 void set_defaults_(FLAC__StreamDecoder *decoder)
1236 decoder->private_->is_ogg = false;
1238 decoder->private_->read_callback = 0;
1239 decoder->private_->seek_callback = 0;
1240 decoder->private_->tell_callback = 0;
1241 decoder->private_->length_callback = 0;
1242 decoder->private_->eof_callback = 0;
1243 decoder->private_->write_callback = 0;
1244 decoder->private_->metadata_callback = 0;
1245 decoder->private_->error_callback = 0;
1246 decoder->private_->client_data = 0;
1248 memset(decoder->private_->metadata_filter, 0, sizeof(decoder->private_->metadata_filter));
1249 decoder->private_->metadata_filter[FLAC__METADATA_TYPE_STREAMINFO] = true;
1250 decoder->private_->metadata_filter_ids_count = 0;
1252 decoder->protected_->md5_checking = false;
1255 FLAC__ogg_decoder_aspect_set_defaults(&decoder->protected_->ogg_decoder_aspect);
1260 * This will forcibly set stdin to binary mode (for OSes that require it)
1262 FILE *get_binary_stdin_(void)
1264 /* if something breaks here it is probably due to the presence or
1265 * absence of an underscore before the identifiers 'setmode',
1266 * 'fileno', and/or 'O_BINARY'; check your system header files.
1268 #if defined _MSC_VER || defined __MINGW32__
1269 _setmode(_fileno(stdin), _O_BINARY);
1270 #elif defined __CYGWIN__
1271 /* almost certainly not needed for any modern Cygwin, but let's be safe... */
1272 setmode(_fileno(stdin), _O_BINARY);
1273 #elif defined __EMX__
1274 setmode(fileno(stdin), O_BINARY);
1280 FLAC__bool allocate_output_(FLAC__StreamDecoder *decoder, unsigned size, unsigned channels)
1285 if(size <= decoder->private_->output_capacity && channels <= decoder->private_->output_channels)
1288 /* simply using realloc() is not practical because the number of channels may change mid-stream */
1290 for(i = 0; i < FLAC__MAX_CHANNELS; i++) {
1291 if(0 != decoder->private_->output[i]) {
1292 free(decoder->private_->output[i]-4);
1293 decoder->private_->output[i] = 0;
1295 if(0 != decoder->private_->residual_unaligned[i]) {
1296 free(decoder->private_->residual_unaligned[i]);
1297 decoder->private_->residual_unaligned[i] = decoder->private_->residual[i] = 0;
1301 for(i = 0; i < channels; i++) {
1303 * FLAC__lpc_restore_signal_asm_ia32_mmx() requires that the
1304 * output arrays have a buffer of up to 3 zeroes in front
1305 * (at negative indices) for alignment purposes; we use 4
1306 * to keep the data well-aligned.
1308 tmp = safe_malloc_muladd2_(sizeof(FLAC__int32), /*times (*/size, /*+*/4/*)*/);
1310 decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
1313 memset(tmp, 0, sizeof(FLAC__int32)*4);
1314 decoder->private_->output[i] = tmp + 4;
1317 * minimum of quadword alignment for PPC vector optimizations is REQUIRED:
1319 if(!FLAC__memory_alloc_aligned_int32_array(size, &decoder->private_->residual_unaligned[i], &decoder->private_->residual[i])) {
1320 decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
1325 decoder->private_->output_capacity = size;
1326 decoder->private_->output_channels = channels;
1331 FLAC__bool has_id_filtered_(FLAC__StreamDecoder *decoder, FLAC__byte *id)
1335 FLAC__ASSERT(0 != decoder);
1336 FLAC__ASSERT(0 != decoder->private_);
1338 for(i = 0; i < decoder->private_->metadata_filter_ids_count; i++)
1339 if(0 == memcmp(decoder->private_->metadata_filter_ids + i * (FLAC__STREAM_METADATA_APPLICATION_ID_LEN/8), id, (FLAC__STREAM_METADATA_APPLICATION_ID_LEN/8)))
1345 FLAC__bool find_metadata_(FLAC__StreamDecoder *decoder)
1349 FLAC__bool first = true;
1351 FLAC__ASSERT(FLAC__bitreader_is_consumed_byte_aligned(decoder->private_->input));
1353 for(i = id = 0; i < 4; ) {
1354 if(decoder->private_->cached) {
1355 x = (FLAC__uint32)decoder->private_->lookahead;
1356 decoder->private_->cached = false;
1359 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, 8))
1360 return false; /* read_callback_ sets the state for us */
1362 if(x == FLAC__STREAM_SYNC_STRING[i]) {
1372 if(x == ID3V2_TAG_[id]) {
1376 if(!skip_id3v2_tag_(decoder))
1377 return false; /* skip_id3v2_tag_ sets the state for us */
1382 if(x == 0xff) { /* MAGIC NUMBER for the first 8 frame sync bits */
1383 decoder->private_->header_warmup[0] = (FLAC__byte)x;
1384 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, 8))
1385 return false; /* read_callback_ sets the state for us */
1387 /* 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 */
1388 /* else we have to check if the second byte is the end of a sync code */
1389 if(x == 0xff) { /* MAGIC NUMBER for the first 8 frame sync bits */
1390 decoder->private_->lookahead = (FLAC__byte)x;
1391 decoder->private_->cached = true;
1393 else if(x >> 1 == 0x7c) { /* MAGIC NUMBER for the last 6 sync bits and reserved 7th bit */
1394 decoder->private_->header_warmup[1] = (FLAC__byte)x;
1395 decoder->protected_->state = FLAC__STREAM_DECODER_READ_FRAME;
1401 send_error_to_client_(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC);
1406 decoder->protected_->state = FLAC__STREAM_DECODER_READ_METADATA;
1410 FLAC__bool read_metadata_(FLAC__StreamDecoder *decoder)
1413 FLAC__uint32 i, x, type, length;
1415 FLAC__ASSERT(FLAC__bitreader_is_consumed_byte_aligned(decoder->private_->input));
1417 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_IS_LAST_LEN))
1418 return false; /* read_callback_ sets the state for us */
1419 is_last = x? true : false;
1421 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &type, FLAC__STREAM_METADATA_TYPE_LEN))
1422 return false; /* read_callback_ sets the state for us */
1424 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &length, FLAC__STREAM_METADATA_LENGTH_LEN))
1425 return false; /* read_callback_ sets the state for us */
1427 if(type == FLAC__METADATA_TYPE_STREAMINFO) {
1428 if(!read_metadata_streaminfo_(decoder, is_last, length))
1431 decoder->private_->has_stream_info = true;
1432 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))
1433 decoder->private_->do_md5_checking = false;
1434 if(!decoder->private_->is_seeking && decoder->private_->metadata_filter[FLAC__METADATA_TYPE_STREAMINFO] && decoder->private_->metadata_callback)
1435 decoder->private_->metadata_callback(decoder, &decoder->private_->stream_info, decoder->private_->client_data);
1437 else if(type == FLAC__METADATA_TYPE_SEEKTABLE) {
1438 if(!read_metadata_seektable_(decoder, is_last, length))
1441 decoder->private_->has_seek_table = true;
1442 if(!decoder->private_->is_seeking && decoder->private_->metadata_filter[FLAC__METADATA_TYPE_SEEKTABLE] && decoder->private_->metadata_callback)
1443 decoder->private_->metadata_callback(decoder, &decoder->private_->seek_table, decoder->private_->client_data);
1446 FLAC__bool skip_it = !decoder->private_->metadata_filter[type];
1447 unsigned real_length = length;
1448 FLAC__StreamMetadata block;
1450 block.is_last = is_last;
1451 block.type = (FLAC__MetadataType)type;
1452 block.length = length;
1454 if(type == FLAC__METADATA_TYPE_APPLICATION) {
1455 if(!FLAC__bitreader_read_byte_block_aligned_no_crc(decoder->private_->input, block.data.application.id, FLAC__STREAM_METADATA_APPLICATION_ID_LEN/8))
1456 return false; /* read_callback_ sets the state for us */
1458 if(real_length < FLAC__STREAM_METADATA_APPLICATION_ID_LEN/8) { /* underflow check */
1459 decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;/*@@@@@@ maybe wrong error? need to resync?*/
1463 real_length -= FLAC__STREAM_METADATA_APPLICATION_ID_LEN/8;
1465 if(decoder->private_->metadata_filter_ids_count > 0 && has_id_filtered_(decoder, block.data.application.id))
1470 if(!FLAC__bitreader_skip_byte_block_aligned_no_crc(decoder->private_->input, real_length))
1471 return false; /* read_callback_ sets the state for us */
1475 case FLAC__METADATA_TYPE_PADDING:
1476 /* skip the padding bytes */
1477 if(!FLAC__bitreader_skip_byte_block_aligned_no_crc(decoder->private_->input, real_length))
1478 return false; /* read_callback_ sets the state for us */
1480 case FLAC__METADATA_TYPE_APPLICATION:
1481 /* remember, we read the ID already */
1482 if(real_length > 0) {
1483 if(0 == (block.data.application.data = malloc(real_length))) {
1484 decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
1487 if(!FLAC__bitreader_read_byte_block_aligned_no_crc(decoder->private_->input, block.data.application.data, real_length))
1488 return false; /* read_callback_ sets the state for us */
1491 block.data.application.data = 0;
1493 case FLAC__METADATA_TYPE_VORBIS_COMMENT:
1494 if(!read_metadata_vorbiscomment_(decoder, &block.data.vorbis_comment))
1497 case FLAC__METADATA_TYPE_CUESHEET:
1498 if(!read_metadata_cuesheet_(decoder, &block.data.cue_sheet))
1501 case FLAC__METADATA_TYPE_PICTURE:
1502 if(!read_metadata_picture_(decoder, &block.data.picture))
1505 case FLAC__METADATA_TYPE_STREAMINFO:
1506 case FLAC__METADATA_TYPE_SEEKTABLE:
1510 if(real_length > 0) {
1511 if(0 == (block.data.unknown.data = malloc(real_length))) {
1512 decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
1515 if(!FLAC__bitreader_read_byte_block_aligned_no_crc(decoder->private_->input, block.data.unknown.data, real_length))
1516 return false; /* read_callback_ sets the state for us */
1519 block.data.unknown.data = 0;
1522 if(!decoder->private_->is_seeking && decoder->private_->metadata_callback)
1523 decoder->private_->metadata_callback(decoder, &block, decoder->private_->client_data);
1525 /* now we have to free any malloc()ed data in the block */
1527 case FLAC__METADATA_TYPE_PADDING:
1529 case FLAC__METADATA_TYPE_APPLICATION:
1530 if(0 != block.data.application.data)
1531 free(block.data.application.data);
1533 case FLAC__METADATA_TYPE_VORBIS_COMMENT:
1534 if(0 != block.data.vorbis_comment.vendor_string.entry)
1535 free(block.data.vorbis_comment.vendor_string.entry);
1536 if(block.data.vorbis_comment.num_comments > 0)
1537 for(i = 0; i < block.data.vorbis_comment.num_comments; i++)
1538 if(0 != block.data.vorbis_comment.comments[i].entry)
1539 free(block.data.vorbis_comment.comments[i].entry);
1540 if(0 != block.data.vorbis_comment.comments)
1541 free(block.data.vorbis_comment.comments);
1543 case FLAC__METADATA_TYPE_CUESHEET:
1544 if(block.data.cue_sheet.num_tracks > 0)
1545 for(i = 0; i < block.data.cue_sheet.num_tracks; i++)
1546 if(0 != block.data.cue_sheet.tracks[i].indices)
1547 free(block.data.cue_sheet.tracks[i].indices);
1548 if(0 != block.data.cue_sheet.tracks)
1549 free(block.data.cue_sheet.tracks);
1551 case FLAC__METADATA_TYPE_PICTURE:
1552 if(0 != block.data.picture.mime_type)
1553 free(block.data.picture.mime_type);
1554 if(0 != block.data.picture.description)
1555 free(block.data.picture.description);
1556 if(0 != block.data.picture.data)
1557 free(block.data.picture.data);
1559 case FLAC__METADATA_TYPE_STREAMINFO:
1560 case FLAC__METADATA_TYPE_SEEKTABLE:
1563 if(0 != block.data.unknown.data)
1564 free(block.data.unknown.data);
1571 /* if this fails, it's OK, it's just a hint for the seek routine */
1572 if(!FLAC__stream_decoder_get_decode_position(decoder, &decoder->private_->first_frame_offset))
1573 decoder->private_->first_frame_offset = 0;
1574 decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
1580 FLAC__bool read_metadata_streaminfo_(FLAC__StreamDecoder *decoder, FLAC__bool is_last, unsigned length)
1583 unsigned bits, used_bits = 0;
1585 FLAC__ASSERT(FLAC__bitreader_is_consumed_byte_aligned(decoder->private_->input));
1587 decoder->private_->stream_info.type = FLAC__METADATA_TYPE_STREAMINFO;
1588 decoder->private_->stream_info.is_last = is_last;
1589 decoder->private_->stream_info.length = length;
1591 bits = FLAC__STREAM_METADATA_STREAMINFO_MIN_BLOCK_SIZE_LEN;
1592 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, bits))
1593 return false; /* read_callback_ sets the state for us */
1594 decoder->private_->stream_info.data.stream_info.min_blocksize = x;
1597 bits = FLAC__STREAM_METADATA_STREAMINFO_MAX_BLOCK_SIZE_LEN;
1598 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_STREAMINFO_MAX_BLOCK_SIZE_LEN))
1599 return false; /* read_callback_ sets the state for us */
1600 decoder->private_->stream_info.data.stream_info.max_blocksize = x;
1603 bits = FLAC__STREAM_METADATA_STREAMINFO_MIN_FRAME_SIZE_LEN;
1604 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_STREAMINFO_MIN_FRAME_SIZE_LEN))
1605 return false; /* read_callback_ sets the state for us */
1606 decoder->private_->stream_info.data.stream_info.min_framesize = x;
1609 bits = FLAC__STREAM_METADATA_STREAMINFO_MAX_FRAME_SIZE_LEN;
1610 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_STREAMINFO_MAX_FRAME_SIZE_LEN))
1611 return false; /* read_callback_ sets the state for us */
1612 decoder->private_->stream_info.data.stream_info.max_framesize = x;
1615 bits = FLAC__STREAM_METADATA_STREAMINFO_SAMPLE_RATE_LEN;
1616 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_STREAMINFO_SAMPLE_RATE_LEN))
1617 return false; /* read_callback_ sets the state for us */
1618 decoder->private_->stream_info.data.stream_info.sample_rate = x;
1621 bits = FLAC__STREAM_METADATA_STREAMINFO_CHANNELS_LEN;
1622 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_STREAMINFO_CHANNELS_LEN))
1623 return false; /* read_callback_ sets the state for us */
1624 decoder->private_->stream_info.data.stream_info.channels = x+1;
1627 bits = FLAC__STREAM_METADATA_STREAMINFO_BITS_PER_SAMPLE_LEN;
1628 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_STREAMINFO_BITS_PER_SAMPLE_LEN))
1629 return false; /* read_callback_ sets the state for us */
1630 decoder->private_->stream_info.data.stream_info.bits_per_sample = x+1;
1633 bits = FLAC__STREAM_METADATA_STREAMINFO_TOTAL_SAMPLES_LEN;
1634 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))
1635 return false; /* read_callback_ sets the state for us */
1638 if(!FLAC__bitreader_read_byte_block_aligned_no_crc(decoder->private_->input, decoder->private_->stream_info.data.stream_info.md5sum, 16))
1639 return false; /* read_callback_ sets the state for us */
1642 /* skip the rest of the block */
1643 FLAC__ASSERT(used_bits % 8 == 0);
1644 length -= (used_bits / 8);
1645 if(!FLAC__bitreader_skip_byte_block_aligned_no_crc(decoder->private_->input, length))
1646 return false; /* read_callback_ sets the state for us */
1651 FLAC__bool read_metadata_seektable_(FLAC__StreamDecoder *decoder, FLAC__bool is_last, unsigned length)
1656 FLAC__ASSERT(FLAC__bitreader_is_consumed_byte_aligned(decoder->private_->input));
1658 decoder->private_->seek_table.type = FLAC__METADATA_TYPE_SEEKTABLE;
1659 decoder->private_->seek_table.is_last = is_last;
1660 decoder->private_->seek_table.length = length;
1662 decoder->private_->seek_table.data.seek_table.num_points = length / FLAC__STREAM_METADATA_SEEKPOINT_LENGTH;
1664 /* use realloc since we may pass through here several times (e.g. after seeking) */
1665 if(0 == (decoder->private_->seek_table.data.seek_table.points = safe_realloc_mul_2op_(decoder->private_->seek_table.data.seek_table.points, decoder->private_->seek_table.data.seek_table.num_points, /*times*/sizeof(FLAC__StreamMetadata_SeekPoint)))) {
1666 decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
1669 for(i = 0; i < decoder->private_->seek_table.data.seek_table.num_points; i++) {
1670 if(!FLAC__bitreader_read_raw_uint64(decoder->private_->input, &xx, FLAC__STREAM_METADATA_SEEKPOINT_SAMPLE_NUMBER_LEN))
1671 return false; /* read_callback_ sets the state for us */
1672 decoder->private_->seek_table.data.seek_table.points[i].sample_number = xx;
1674 if(!FLAC__bitreader_read_raw_uint64(decoder->private_->input, &xx, FLAC__STREAM_METADATA_SEEKPOINT_STREAM_OFFSET_LEN))
1675 return false; /* read_callback_ sets the state for us */
1676 decoder->private_->seek_table.data.seek_table.points[i].stream_offset = xx;
1678 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_SEEKPOINT_FRAME_SAMPLES_LEN))
1679 return false; /* read_callback_ sets the state for us */
1680 decoder->private_->seek_table.data.seek_table.points[i].frame_samples = x;
1682 length -= (decoder->private_->seek_table.data.seek_table.num_points * FLAC__STREAM_METADATA_SEEKPOINT_LENGTH);
1683 /* if there is a partial point left, skip over it */
1685 /*@@@ do a send_error_to_client_() here? there's an argument for either way */
1686 if(!FLAC__bitreader_skip_byte_block_aligned_no_crc(decoder->private_->input, length))
1687 return false; /* read_callback_ sets the state for us */
1693 FLAC__bool read_metadata_vorbiscomment_(FLAC__StreamDecoder *decoder, FLAC__StreamMetadata_VorbisComment *obj)
1697 FLAC__ASSERT(FLAC__bitreader_is_consumed_byte_aligned(decoder->private_->input));
1699 /* read vendor string */
1700 FLAC__ASSERT(FLAC__STREAM_METADATA_VORBIS_COMMENT_ENTRY_LENGTH_LEN == 32);
1701 if(!FLAC__bitreader_read_uint32_little_endian(decoder->private_->input, &obj->vendor_string.length))
1702 return false; /* read_callback_ sets the state for us */
1703 if(obj->vendor_string.length > 0) {
1704 if(0 == (obj->vendor_string.entry = safe_malloc_add_2op_(obj->vendor_string.length, /*+*/1))) {
1705 decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
1708 if(!FLAC__bitreader_read_byte_block_aligned_no_crc(decoder->private_->input, obj->vendor_string.entry, obj->vendor_string.length))
1709 return false; /* read_callback_ sets the state for us */
1710 obj->vendor_string.entry[obj->vendor_string.length] = '\0';
1713 obj->vendor_string.entry = 0;
1715 /* read num comments */
1716 FLAC__ASSERT(FLAC__STREAM_METADATA_VORBIS_COMMENT_NUM_COMMENTS_LEN == 32);
1717 if(!FLAC__bitreader_read_uint32_little_endian(decoder->private_->input, &obj->num_comments))
1718 return false; /* read_callback_ sets the state for us */
1721 if(obj->num_comments > 0) {
1722 if(0 == (obj->comments = safe_malloc_mul_2op_p(obj->num_comments, /*times*/sizeof(FLAC__StreamMetadata_VorbisComment_Entry)))) {
1723 decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
1726 for(i = 0; i < obj->num_comments; i++) {
1727 FLAC__ASSERT(FLAC__STREAM_METADATA_VORBIS_COMMENT_ENTRY_LENGTH_LEN == 32);
1728 if(!FLAC__bitreader_read_uint32_little_endian(decoder->private_->input, &obj->comments[i].length))
1729 return false; /* read_callback_ sets the state for us */
1730 if(obj->comments[i].length > 0) {
1731 if(0 == (obj->comments[i].entry = safe_malloc_add_2op_(obj->comments[i].length, /*+*/1))) {
1732 decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
1735 if(!FLAC__bitreader_read_byte_block_aligned_no_crc(decoder->private_->input, obj->comments[i].entry, obj->comments[i].length))
1736 return false; /* read_callback_ sets the state for us */
1737 obj->comments[i].entry[obj->comments[i].length] = '\0';
1740 obj->comments[i].entry = 0;
1750 FLAC__bool read_metadata_cuesheet_(FLAC__StreamDecoder *decoder, FLAC__StreamMetadata_CueSheet *obj)
1752 FLAC__uint32 i, j, x;
1754 FLAC__ASSERT(FLAC__bitreader_is_consumed_byte_aligned(decoder->private_->input));
1756 memset(obj, 0, sizeof(FLAC__StreamMetadata_CueSheet));
1758 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_MEDIA_CATALOG_NUMBER_LEN % 8 == 0);
1759 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))
1760 return false; /* read_callback_ sets the state for us */
1762 if(!FLAC__bitreader_read_raw_uint64(decoder->private_->input, &obj->lead_in, FLAC__STREAM_METADATA_CUESHEET_LEAD_IN_LEN))
1763 return false; /* read_callback_ sets the state for us */
1765 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_CUESHEET_IS_CD_LEN))
1766 return false; /* read_callback_ sets the state for us */
1767 obj->is_cd = x? true : false;
1769 if(!FLAC__bitreader_skip_bits_no_crc(decoder->private_->input, FLAC__STREAM_METADATA_CUESHEET_RESERVED_LEN))
1770 return false; /* read_callback_ sets the state for us */
1772 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_CUESHEET_NUM_TRACKS_LEN))
1773 return false; /* read_callback_ sets the state for us */
1774 obj->num_tracks = x;
1776 if(obj->num_tracks > 0) {
1777 if(0 == (obj->tracks = safe_calloc_(obj->num_tracks, sizeof(FLAC__StreamMetadata_CueSheet_Track)))) {
1778 decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
1781 for(i = 0; i < obj->num_tracks; i++) {
1782 FLAC__StreamMetadata_CueSheet_Track *track = &obj->tracks[i];
1783 if(!FLAC__bitreader_read_raw_uint64(decoder->private_->input, &track->offset, FLAC__STREAM_METADATA_CUESHEET_TRACK_OFFSET_LEN))
1784 return false; /* read_callback_ sets the state for us */
1786 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_CUESHEET_TRACK_NUMBER_LEN))
1787 return false; /* read_callback_ sets the state for us */
1788 track->number = (FLAC__byte)x;
1790 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_ISRC_LEN % 8 == 0);
1791 if(!FLAC__bitreader_read_byte_block_aligned_no_crc(decoder->private_->input, (FLAC__byte*)track->isrc, FLAC__STREAM_METADATA_CUESHEET_TRACK_ISRC_LEN/8))
1792 return false; /* read_callback_ sets the state for us */
1794 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_CUESHEET_TRACK_TYPE_LEN))
1795 return false; /* read_callback_ sets the state for us */
1798 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_CUESHEET_TRACK_PRE_EMPHASIS_LEN))
1799 return false; /* read_callback_ sets the state for us */
1800 track->pre_emphasis = x;
1802 if(!FLAC__bitreader_skip_bits_no_crc(decoder->private_->input, FLAC__STREAM_METADATA_CUESHEET_TRACK_RESERVED_LEN))
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_NUM_INDICES_LEN))
1806 return false; /* read_callback_ sets the state for us */
1807 track->num_indices = (FLAC__byte)x;
1809 if(track->num_indices > 0) {
1810 if(0 == (track->indices = safe_calloc_(track->num_indices, sizeof(FLAC__StreamMetadata_CueSheet_Index)))) {
1811 decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
1814 for(j = 0; j < track->num_indices; j++) {
1815 FLAC__StreamMetadata_CueSheet_Index *indx = &track->indices[j];
1816 if(!FLAC__bitreader_read_raw_uint64(decoder->private_->input, &indx->offset, FLAC__STREAM_METADATA_CUESHEET_INDEX_OFFSET_LEN))
1817 return false; /* read_callback_ sets the state for us */
1819 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_CUESHEET_INDEX_NUMBER_LEN))
1820 return false; /* read_callback_ sets the state for us */
1821 indx->number = (FLAC__byte)x;
1823 if(!FLAC__bitreader_skip_bits_no_crc(decoder->private_->input, FLAC__STREAM_METADATA_CUESHEET_INDEX_RESERVED_LEN))
1824 return false; /* read_callback_ sets the state for us */
1833 FLAC__bool read_metadata_picture_(FLAC__StreamDecoder *decoder, FLAC__StreamMetadata_Picture *obj)
1837 FLAC__ASSERT(FLAC__bitreader_is_consumed_byte_aligned(decoder->private_->input));
1840 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_PICTURE_TYPE_LEN))
1841 return false; /* read_callback_ sets the state for us */
1844 /* read MIME type */
1845 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_PICTURE_MIME_TYPE_LENGTH_LEN))
1846 return false; /* read_callback_ sets the state for us */
1847 if(0 == (obj->mime_type = safe_malloc_add_2op_(x, /*+*/1))) {
1848 decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
1852 if(!FLAC__bitreader_read_byte_block_aligned_no_crc(decoder->private_->input, (FLAC__byte*)obj->mime_type, x))
1853 return false; /* read_callback_ sets the state for us */
1855 obj->mime_type[x] = '\0';
1857 /* read description */
1858 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_PICTURE_DESCRIPTION_LENGTH_LEN))
1859 return false; /* read_callback_ sets the state for us */
1860 if(0 == (obj->description = safe_malloc_add_2op_(x, /*+*/1))) {
1861 decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
1865 if(!FLAC__bitreader_read_byte_block_aligned_no_crc(decoder->private_->input, obj->description, x))
1866 return false; /* read_callback_ sets the state for us */
1868 obj->description[x] = '\0';
1871 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &obj->width, FLAC__STREAM_METADATA_PICTURE_WIDTH_LEN))
1872 return false; /* read_callback_ sets the state for us */
1875 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &obj->height, FLAC__STREAM_METADATA_PICTURE_HEIGHT_LEN))
1876 return false; /* read_callback_ sets the state for us */
1879 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &obj->depth, FLAC__STREAM_METADATA_PICTURE_DEPTH_LEN))
1880 return false; /* read_callback_ sets the state for us */
1883 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &obj->colors, FLAC__STREAM_METADATA_PICTURE_COLORS_LEN))
1884 return false; /* read_callback_ sets the state for us */
1887 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &(obj->data_length), FLAC__STREAM_METADATA_PICTURE_DATA_LENGTH_LEN))
1888 return false; /* read_callback_ sets the state for us */
1889 if(0 == (obj->data = safe_malloc_(obj->data_length))) {
1890 decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
1893 if(obj->data_length > 0) {
1894 if(!FLAC__bitreader_read_byte_block_aligned_no_crc(decoder->private_->input, obj->data, obj->data_length))
1895 return false; /* read_callback_ sets the state for us */
1901 FLAC__bool skip_id3v2_tag_(FLAC__StreamDecoder *decoder)
1906 /* skip the version and flags bytes */
1907 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, 24))
1908 return false; /* read_callback_ sets the state for us */
1909 /* get the size (in bytes) to skip */
1911 for(i = 0; i < 4; i++) {
1912 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, 8))
1913 return false; /* read_callback_ sets the state for us */
1917 /* skip the rest of the tag */
1918 if(!FLAC__bitreader_skip_byte_block_aligned_no_crc(decoder->private_->input, skip))
1919 return false; /* read_callback_ sets the state for us */
1923 FLAC__bool frame_sync_(FLAC__StreamDecoder *decoder)
1926 FLAC__bool first = true;
1928 /* If we know the total number of samples in the stream, stop if we've read that many. */
1929 /* This will stop us, for example, from wasting time trying to sync on an ID3V1 tag. */
1930 if(FLAC__stream_decoder_get_total_samples(decoder) > 0) {
1931 if(decoder->private_->samples_decoded >= FLAC__stream_decoder_get_total_samples(decoder)) {
1932 decoder->protected_->state = FLAC__STREAM_DECODER_END_OF_STREAM;
1937 /* make sure we're byte aligned */
1938 if(!FLAC__bitreader_is_consumed_byte_aligned(decoder->private_->input)) {
1939 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, FLAC__bitreader_bits_left_for_byte_alignment(decoder->private_->input)))
1940 return false; /* read_callback_ sets the state for us */
1944 if(decoder->private_->cached) {
1945 x = (FLAC__uint32)decoder->private_->lookahead;
1946 decoder->private_->cached = false;
1949 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, 8))
1950 return false; /* read_callback_ sets the state for us */
1952 if(x == 0xff) { /* MAGIC NUMBER for the first 8 frame sync bits */
1953 decoder->private_->header_warmup[0] = (FLAC__byte)x;
1954 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, 8))
1955 return false; /* read_callback_ sets the state for us */
1957 /* 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 */
1958 /* else we have to check if the second byte is the end of a sync code */
1959 if(x == 0xff) { /* MAGIC NUMBER for the first 8 frame sync bits */
1960 decoder->private_->lookahead = (FLAC__byte)x;
1961 decoder->private_->cached = true;
1963 else if(x >> 1 == 0x7c) { /* MAGIC NUMBER for the last 6 sync bits and reserved 7th bit */
1964 decoder->private_->header_warmup[1] = (FLAC__byte)x;
1965 decoder->protected_->state = FLAC__STREAM_DECODER_READ_FRAME;
1970 send_error_to_client_(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC);
1978 FLAC__bool read_frame_(FLAC__StreamDecoder *decoder, FLAC__bool *got_a_frame, FLAC__bool do_full_decode)
1982 FLAC__int32 mid, side;
1983 unsigned frame_crc; /* the one we calculate from the input stream */
1986 *got_a_frame = false;
1990 frame_crc = FLAC__CRC16_UPDATE(decoder->private_->header_warmup[0], frame_crc);
1991 frame_crc = FLAC__CRC16_UPDATE(decoder->private_->header_warmup[1], frame_crc);
1992 FLAC__bitreader_reset_read_crc16(decoder->private_->input, (FLAC__uint16)frame_crc);
1994 if(!read_frame_header_(decoder))
1996 if(decoder->protected_->state == FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC) /* means we didn't sync on a valid header */
1998 if(!allocate_output_(decoder, decoder->private_->frame.header.blocksize, decoder->private_->frame.header.channels))
2000 for(channel = 0; channel < decoder->private_->frame.header.channels; channel++) {
2002 * first figure the correct bits-per-sample of the subframe
2004 unsigned bps = decoder->private_->frame.header.bits_per_sample;
2005 switch(decoder->private_->frame.header.channel_assignment) {
2006 case FLAC__CHANNEL_ASSIGNMENT_INDEPENDENT:
2007 /* no adjustment needed */
2009 case FLAC__CHANNEL_ASSIGNMENT_LEFT_SIDE:
2010 FLAC__ASSERT(decoder->private_->frame.header.channels == 2);
2014 case FLAC__CHANNEL_ASSIGNMENT_RIGHT_SIDE:
2015 FLAC__ASSERT(decoder->private_->frame.header.channels == 2);
2019 case FLAC__CHANNEL_ASSIGNMENT_MID_SIDE:
2020 FLAC__ASSERT(decoder->private_->frame.header.channels == 2);
2030 if(!read_subframe_(decoder, channel, bps, do_full_decode))
2032 if(decoder->protected_->state == FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC) /* means bad sync or got corruption */
2035 if(!read_zero_padding_(decoder))
2037 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) */
2041 * Read the frame CRC-16 from the footer and check
2043 frame_crc = FLAC__bitreader_get_read_crc16(decoder->private_->input);
2044 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, FLAC__FRAME_FOOTER_CRC_LEN))
2045 return false; /* read_callback_ sets the state for us */
2046 if(frame_crc == x) {
2047 if(do_full_decode) {
2048 /* Undo any special channel coding */
2049 switch(decoder->private_->frame.header.channel_assignment) {
2050 case FLAC__CHANNEL_ASSIGNMENT_INDEPENDENT:
2053 case FLAC__CHANNEL_ASSIGNMENT_LEFT_SIDE:
2054 FLAC__ASSERT(decoder->private_->frame.header.channels == 2);
2055 for(i = 0; i < decoder->private_->frame.header.blocksize; i++)
2056 decoder->private_->output[1][i] = decoder->private_->output[0][i] - decoder->private_->output[1][i];
2058 case FLAC__CHANNEL_ASSIGNMENT_RIGHT_SIDE:
2059 FLAC__ASSERT(decoder->private_->frame.header.channels == 2);
2060 for(i = 0; i < decoder->private_->frame.header.blocksize; i++)
2061 decoder->private_->output[0][i] += decoder->private_->output[1][i];
2063 case FLAC__CHANNEL_ASSIGNMENT_MID_SIDE:
2064 FLAC__ASSERT(decoder->private_->frame.header.channels == 2);
2065 for(i = 0; i < decoder->private_->frame.header.blocksize; i++) {
2067 mid = decoder->private_->output[0][i];
2068 side = decoder->private_->output[1][i];
2070 mid |= (side & 1); /* i.e. if 'side' is odd... */
2071 decoder->private_->output[0][i] = (mid + side) >> 1;
2072 decoder->private_->output[1][i] = (mid - side) >> 1;
2074 /* OPT: without 'side' temp variable */
2075 mid = (decoder->private_->output[0][i] << 1) | (decoder->private_->output[1][i] & 1); /* i.e. if 'side' is odd... */
2076 decoder->private_->output[0][i] = (mid + decoder->private_->output[1][i]) >> 1;
2077 decoder->private_->output[1][i] = (mid - decoder->private_->output[1][i]) >> 1;
2088 /* Bad frame, emit error and zero the output signal */
2089 send_error_to_client_(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_FRAME_CRC_MISMATCH);
2090 if(do_full_decode) {
2091 for(channel = 0; channel < decoder->private_->frame.header.channels; channel++) {
2092 memset(decoder->private_->output[channel], 0, sizeof(FLAC__int32) * decoder->private_->frame.header.blocksize);
2097 *got_a_frame = true;
2099 /* we wait to update fixed_block_size until here, when we're sure we've got a proper frame and hence a correct blocksize */
2100 if(decoder->private_->next_fixed_block_size)
2101 decoder->private_->fixed_block_size = decoder->private_->next_fixed_block_size;
2103 /* put the latest values into the public section of the decoder instance */
2104 decoder->protected_->channels = decoder->private_->frame.header.channels;
2105 decoder->protected_->channel_assignment = decoder->private_->frame.header.channel_assignment;
2106 decoder->protected_->bits_per_sample = decoder->private_->frame.header.bits_per_sample;
2107 decoder->protected_->sample_rate = decoder->private_->frame.header.sample_rate;
2108 decoder->protected_->blocksize = decoder->private_->frame.header.blocksize;
2110 FLAC__ASSERT(decoder->private_->frame.header.number_type == FLAC__FRAME_NUMBER_TYPE_SAMPLE_NUMBER);
2111 decoder->private_->samples_decoded = decoder->private_->frame.header.number.sample_number + decoder->private_->frame.header.blocksize;
2114 if(do_full_decode) {
2115 if(write_audio_frame_to_client_(decoder, &decoder->private_->frame, (const FLAC__int32 * const *)decoder->private_->output) != FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE)
2119 decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
2123 FLAC__bool read_frame_header_(FLAC__StreamDecoder *decoder)
2127 unsigned i, blocksize_hint = 0, sample_rate_hint = 0;
2128 FLAC__byte crc8, raw_header[16]; /* MAGIC NUMBER based on the maximum frame header size, including CRC */
2129 unsigned raw_header_len;
2130 FLAC__bool is_unparseable = false;
2132 FLAC__ASSERT(FLAC__bitreader_is_consumed_byte_aligned(decoder->private_->input));
2134 /* init the raw header with the saved bits from synchronization */
2135 raw_header[0] = decoder->private_->header_warmup[0];
2136 raw_header[1] = decoder->private_->header_warmup[1];
2139 /* check to make sure that reserved bit is 0 */
2140 if(raw_header[1] & 0x02) /* MAGIC NUMBER */
2141 is_unparseable = true;
2144 * Note that along the way as we read the header, we look for a sync
2145 * code inside. If we find one it would indicate that our original
2146 * sync was bad since there cannot be a sync code in a valid header.
2148 * Three kinds of things can go wrong when reading the frame header:
2149 * 1) We may have sync'ed incorrectly and not landed on a frame header.
2150 * If we don't find a sync code, it can end up looking like we read
2151 * a valid but unparseable header, until getting to the frame header
2152 * CRC. Even then we could get a false positive on the CRC.
2153 * 2) We may have sync'ed correctly but on an unparseable frame (from a
2155 * 3) We may be on a damaged frame which appears valid but unparseable.
2157 * For all these reasons, we try and read a complete frame header as
2158 * long as it seems valid, even if unparseable, up until the frame
2163 * read in the raw header as bytes so we can CRC it, and parse it on the way
2165 for(i = 0; i < 2; i++) {
2166 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, 8))
2167 return false; /* read_callback_ sets the state for us */
2168 if(x == 0xff) { /* MAGIC NUMBER for the first 8 frame sync bits */
2169 /* if we get here it means our original sync was erroneous since the sync code cannot appear in the header */
2170 decoder->private_->lookahead = (FLAC__byte)x;
2171 decoder->private_->cached = true;
2172 send_error_to_client_(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_BAD_HEADER);
2173 decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
2176 raw_header[raw_header_len++] = (FLAC__byte)x;
2179 switch(x = raw_header[2] >> 4) {
2181 is_unparseable = true;
2184 decoder->private_->frame.header.blocksize = 192;
2190 decoder->private_->frame.header.blocksize = 576 << (x-2);
2204 decoder->private_->frame.header.blocksize = 256 << (x-8);
2211 switch(x = raw_header[2] & 0x0f) {
2213 if(decoder->private_->has_stream_info)
2214 decoder->private_->frame.header.sample_rate = decoder->private_->stream_info.data.stream_info.sample_rate;
2216 is_unparseable = true;
2219 decoder->private_->frame.header.sample_rate = 88200;
2222 decoder->private_->frame.header.sample_rate = 176400;
2225 decoder->private_->frame.header.sample_rate = 192000;
2228 decoder->private_->frame.header.sample_rate = 8000;
2231 decoder->private_->frame.header.sample_rate = 16000;
2234 decoder->private_->frame.header.sample_rate = 22050;
2237 decoder->private_->frame.header.sample_rate = 24000;
2240 decoder->private_->frame.header.sample_rate = 32000;
2243 decoder->private_->frame.header.sample_rate = 44100;
2246 decoder->private_->frame.header.sample_rate = 48000;
2249 decoder->private_->frame.header.sample_rate = 96000;
2254 sample_rate_hint = x;
2257 send_error_to_client_(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_BAD_HEADER);
2258 decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
2264 x = (unsigned)(raw_header[3] >> 4);
2266 decoder->private_->frame.header.channels = 2;
2269 decoder->private_->frame.header.channel_assignment = FLAC__CHANNEL_ASSIGNMENT_LEFT_SIDE;
2272 decoder->private_->frame.header.channel_assignment = FLAC__CHANNEL_ASSIGNMENT_RIGHT_SIDE;
2275 decoder->private_->frame.header.channel_assignment = FLAC__CHANNEL_ASSIGNMENT_MID_SIDE;
2278 is_unparseable = true;
2283 decoder->private_->frame.header.channels = (unsigned)x + 1;
2284 decoder->private_->frame.header.channel_assignment = FLAC__CHANNEL_ASSIGNMENT_INDEPENDENT;
2287 switch(x = (unsigned)(raw_header[3] & 0x0e) >> 1) {
2289 if(decoder->private_->has_stream_info)
2290 decoder->private_->frame.header.bits_per_sample = decoder->private_->stream_info.data.stream_info.bits_per_sample;
2292 is_unparseable = true;
2295 decoder->private_->frame.header.bits_per_sample = 8;
2298 decoder->private_->frame.header.bits_per_sample = 12;
2301 decoder->private_->frame.header.bits_per_sample = 16;
2304 decoder->private_->frame.header.bits_per_sample = 20;
2307 decoder->private_->frame.header.bits_per_sample = 24;
2311 is_unparseable = true;
2318 /* check to make sure that reserved bit is 0 */
2319 if(raw_header[3] & 0x01) /* MAGIC NUMBER */
2320 is_unparseable = true;
2322 /* read the frame's starting sample number (or frame number as the case may be) */
2324 raw_header[1] & 0x01 ||
2325 /*@@@ 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 */
2326 (decoder->private_->has_stream_info && decoder->private_->stream_info.data.stream_info.min_blocksize != decoder->private_->stream_info.data.stream_info.max_blocksize)
2327 ) { /* variable blocksize */
2328 if(!FLAC__bitreader_read_utf8_uint64(decoder->private_->input, &xx, raw_header, &raw_header_len))
2329 return false; /* read_callback_ sets the state for us */
2330 if(xx == FLAC__U64L(0xffffffffffffffff)) { /* i.e. non-UTF8 code... */
2331 decoder->private_->lookahead = raw_header[raw_header_len-1]; /* back up as much as we can */
2332 decoder->private_->cached = true;
2333 send_error_to_client_(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_BAD_HEADER);
2334 decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
2337 decoder->private_->frame.header.number_type = FLAC__FRAME_NUMBER_TYPE_SAMPLE_NUMBER;
2338 decoder->private_->frame.header.number.sample_number = xx;
2340 else { /* fixed blocksize */
2341 if(!FLAC__bitreader_read_utf8_uint32(decoder->private_->input, &x, raw_header, &raw_header_len))
2342 return false; /* read_callback_ sets the state for us */
2343 if(x == 0xffffffff) { /* i.e. non-UTF8 code... */
2344 decoder->private_->lookahead = raw_header[raw_header_len-1]; /* back up as much as we can */
2345 decoder->private_->cached = true;
2346 send_error_to_client_(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_BAD_HEADER);
2347 decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
2350 decoder->private_->frame.header.number_type = FLAC__FRAME_NUMBER_TYPE_FRAME_NUMBER;
2351 decoder->private_->frame.header.number.frame_number = x;
2354 if(blocksize_hint) {
2355 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, 8))
2356 return false; /* read_callback_ sets the state for us */
2357 raw_header[raw_header_len++] = (FLAC__byte)x;
2358 if(blocksize_hint == 7) {
2360 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &_x, 8))
2361 return false; /* read_callback_ sets the state for us */
2362 raw_header[raw_header_len++] = (FLAC__byte)_x;
2365 decoder->private_->frame.header.blocksize = x+1;
2368 if(sample_rate_hint) {
2369 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, 8))
2370 return false; /* read_callback_ sets the state for us */
2371 raw_header[raw_header_len++] = (FLAC__byte)x;
2372 if(sample_rate_hint != 12) {
2374 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &_x, 8))
2375 return false; /* read_callback_ sets the state for us */
2376 raw_header[raw_header_len++] = (FLAC__byte)_x;
2379 if(sample_rate_hint == 12)
2380 decoder->private_->frame.header.sample_rate = x*1000;
2381 else if(sample_rate_hint == 13)
2382 decoder->private_->frame.header.sample_rate = x;
2384 decoder->private_->frame.header.sample_rate = x*10;
2387 /* read the CRC-8 byte */
2388 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, 8))
2389 return false; /* read_callback_ sets the state for us */
2390 crc8 = (FLAC__byte)x;
2392 if(FLAC__crc8(raw_header, raw_header_len) != crc8) {
2393 send_error_to_client_(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_BAD_HEADER);
2394 decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
2398 /* calculate the sample number from the frame number if needed */
2399 decoder->private_->next_fixed_block_size = 0;
2400 if(decoder->private_->frame.header.number_type == FLAC__FRAME_NUMBER_TYPE_FRAME_NUMBER) {
2401 x = decoder->private_->frame.header.number.frame_number;
2402 decoder->private_->frame.header.number_type = FLAC__FRAME_NUMBER_TYPE_SAMPLE_NUMBER;
2403 if(decoder->private_->fixed_block_size)
2404 decoder->private_->frame.header.number.sample_number = (FLAC__uint64)decoder->private_->fixed_block_size * (FLAC__uint64)x;
2405 else if(decoder->private_->has_stream_info) {
2406 if(decoder->private_->stream_info.data.stream_info.min_blocksize == decoder->private_->stream_info.data.stream_info.max_blocksize) {
2407 decoder->private_->frame.header.number.sample_number = (FLAC__uint64)decoder->private_->stream_info.data.stream_info.min_blocksize * (FLAC__uint64)x;
2408 decoder->private_->next_fixed_block_size = decoder->private_->stream_info.data.stream_info.max_blocksize;
2411 is_unparseable = true;
2414 decoder->private_->frame.header.number.sample_number = 0;
2415 decoder->private_->next_fixed_block_size = decoder->private_->frame.header.blocksize;
2418 /* can only get here if the stream has invalid frame numbering and no STREAMINFO, so assume it's not the last (possibly short) frame */
2419 decoder->private_->frame.header.number.sample_number = (FLAC__uint64)decoder->private_->frame.header.blocksize * (FLAC__uint64)x;
2423 if(is_unparseable) {
2424 send_error_to_client_(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_UNPARSEABLE_STREAM);
2425 decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
2432 FLAC__bool read_subframe_(FLAC__StreamDecoder *decoder, unsigned channel, unsigned bps, FLAC__bool do_full_decode)
2435 FLAC__bool wasted_bits;
2438 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, 8)) /* MAGIC NUMBER */
2439 return false; /* read_callback_ sets the state for us */
2441 wasted_bits = (x & 1);
2446 if(!FLAC__bitreader_read_unary_unsigned(decoder->private_->input, &u))
2447 return false; /* read_callback_ sets the state for us */
2448 decoder->private_->frame.subframes[channel].wasted_bits = u+1;
2449 bps -= decoder->private_->frame.subframes[channel].wasted_bits;
2452 decoder->private_->frame.subframes[channel].wasted_bits = 0;
2455 * Lots of magic numbers here
2458 send_error_to_client_(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC);
2459 decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
2463 if(!read_subframe_constant_(decoder, channel, bps, do_full_decode))
2467 if(!read_subframe_verbatim_(decoder, channel, bps, do_full_decode))
2471 send_error_to_client_(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_UNPARSEABLE_STREAM);
2472 decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
2476 if(!read_subframe_fixed_(decoder, channel, bps, (x>>1)&7, do_full_decode))
2478 if(decoder->protected_->state == FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC) /* means bad sync or got corruption */
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_lpc_(decoder, channel, bps, ((x>>1)&31)+1, do_full_decode))
2489 if(decoder->protected_->state == FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC) /* means bad sync or got corruption */
2493 if(wasted_bits && do_full_decode) {
2494 x = decoder->private_->frame.subframes[channel].wasted_bits;
2495 for(i = 0; i < decoder->private_->frame.header.blocksize; i++)
2496 decoder->private_->output[channel][i] <<= x;
2502 FLAC__bool read_subframe_constant_(FLAC__StreamDecoder *decoder, unsigned channel, unsigned bps, FLAC__bool do_full_decode)
2504 FLAC__Subframe_Constant *subframe = &decoder->private_->frame.subframes[channel].data.constant;
2507 FLAC__int32 *output = decoder->private_->output[channel];
2509 decoder->private_->frame.subframes[channel].type = FLAC__SUBFRAME_TYPE_CONSTANT;
2511 if(!FLAC__bitreader_read_raw_int32(decoder->private_->input, &x, bps))
2512 return false; /* read_callback_ sets the state for us */
2514 subframe->value = x;
2516 /* decode the subframe */
2517 if(do_full_decode) {
2518 for(i = 0; i < decoder->private_->frame.header.blocksize; i++)
2525 FLAC__bool read_subframe_fixed_(FLAC__StreamDecoder *decoder, unsigned channel, unsigned bps, const unsigned order, FLAC__bool do_full_decode)
2527 FLAC__Subframe_Fixed *subframe = &decoder->private_->frame.subframes[channel].data.fixed;
2532 decoder->private_->frame.subframes[channel].type = FLAC__SUBFRAME_TYPE_FIXED;
2534 subframe->residual = decoder->private_->residual[channel];
2535 subframe->order = order;
2537 /* read warm-up samples */
2538 for(u = 0; u < order; u++) {
2539 if(!FLAC__bitreader_read_raw_int32(decoder->private_->input, &i32, bps))
2540 return false; /* read_callback_ sets the state for us */
2541 subframe->warmup[u] = i32;
2544 /* read entropy coding method info */
2545 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &u32, FLAC__ENTROPY_CODING_METHOD_TYPE_LEN))
2546 return false; /* read_callback_ sets the state for us */
2547 subframe->entropy_coding_method.type = (FLAC__EntropyCodingMethodType)u32;
2548 switch(subframe->entropy_coding_method.type) {
2549 case FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE:
2550 case FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE2:
2551 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &u32, FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ORDER_LEN))
2552 return false; /* read_callback_ sets the state for us */
2553 subframe->entropy_coding_method.data.partitioned_rice.order = u32;
2554 subframe->entropy_coding_method.data.partitioned_rice.contents = &decoder->private_->partitioned_rice_contents[channel];
2557 send_error_to_client_(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_UNPARSEABLE_STREAM);
2558 decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
2563 switch(subframe->entropy_coding_method.type) {
2564 case FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE:
2565 case FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE2:
2566 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))
2573 /* decode the subframe */
2574 if(do_full_decode) {
2575 memcpy(decoder->private_->output[channel], subframe->warmup, sizeof(FLAC__int32) * order);
2576 FLAC__fixed_restore_signal(decoder->private_->residual[channel], decoder->private_->frame.header.blocksize-order, order, decoder->private_->output[channel]+order);
2582 FLAC__bool read_subframe_lpc_(FLAC__StreamDecoder *decoder, unsigned channel, unsigned bps, const unsigned order, FLAC__bool do_full_decode)
2584 FLAC__Subframe_LPC *subframe = &decoder->private_->frame.subframes[channel].data.lpc;
2589 decoder->private_->frame.subframes[channel].type = FLAC__SUBFRAME_TYPE_LPC;
2591 subframe->residual = decoder->private_->residual[channel];
2592 subframe->order = order;
2594 /* read warm-up samples */
2595 for(u = 0; u < order; u++) {
2596 if(!FLAC__bitreader_read_raw_int32(decoder->private_->input, &i32, bps))
2597 return false; /* read_callback_ sets the state for us */
2598 subframe->warmup[u] = i32;
2601 /* read qlp coeff precision */
2602 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &u32, FLAC__SUBFRAME_LPC_QLP_COEFF_PRECISION_LEN))
2603 return false; /* read_callback_ sets the state for us */
2604 if(u32 == (1u << FLAC__SUBFRAME_LPC_QLP_COEFF_PRECISION_LEN) - 1) {
2605 send_error_to_client_(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC);
2606 decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
2609 subframe->qlp_coeff_precision = u32+1;
2611 /* read qlp shift */
2612 if(!FLAC__bitreader_read_raw_int32(decoder->private_->input, &i32, FLAC__SUBFRAME_LPC_QLP_SHIFT_LEN))
2613 return false; /* read_callback_ sets the state for us */
2614 subframe->quantization_level = i32;
2616 /* read quantized lp coefficiencts */
2617 for(u = 0; u < order; u++) {
2618 if(!FLAC__bitreader_read_raw_int32(decoder->private_->input, &i32, subframe->qlp_coeff_precision))
2619 return false; /* read_callback_ sets the state for us */
2620 subframe->qlp_coeff[u] = i32;
2623 /* read entropy coding method info */
2624 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &u32, FLAC__ENTROPY_CODING_METHOD_TYPE_LEN))
2625 return false; /* read_callback_ sets the state for us */
2626 subframe->entropy_coding_method.type = (FLAC__EntropyCodingMethodType)u32;
2627 switch(subframe->entropy_coding_method.type) {
2628 case FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE:
2629 case FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE2:
2630 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &u32, FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ORDER_LEN))
2631 return false; /* read_callback_ sets the state for us */
2632 subframe->entropy_coding_method.data.partitioned_rice.order = u32;
2633 subframe->entropy_coding_method.data.partitioned_rice.contents = &decoder->private_->partitioned_rice_contents[channel];
2636 send_error_to_client_(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_UNPARSEABLE_STREAM);
2637 decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
2642 switch(subframe->entropy_coding_method.type) {
2643 case FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE:
2644 case FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE2:
2645 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))
2652 /* decode the subframe */
2653 if(do_full_decode) {
2654 memcpy(decoder->private_->output[channel], subframe->warmup, sizeof(FLAC__int32) * order);
2655 /*@@@@@@ technically not pessimistic enough, should be more like
2656 if( (FLAC__uint64)order * ((((FLAC__uint64)1)<<bps)-1) * ((1<<subframe->qlp_coeff_precision)-1) < (((FLAC__uint64)-1) << 32) )
2658 if(bps + subframe->qlp_coeff_precision + FLAC__bitmath_ilog2(order) <= 32)
2659 if(bps <= 16 && subframe->qlp_coeff_precision <= 16) {
2661 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);
2663 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);
2666 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);
2668 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);
2674 FLAC__bool read_subframe_verbatim_(FLAC__StreamDecoder *decoder, unsigned channel, unsigned bps, FLAC__bool do_full_decode)
2676 FLAC__Subframe_Verbatim *subframe = &decoder->private_->frame.subframes[channel].data.verbatim;
2677 FLAC__int32 x, *residual = decoder->private_->residual[channel];
2680 decoder->private_->frame.subframes[channel].type = FLAC__SUBFRAME_TYPE_VERBATIM;
2682 subframe->data = residual;
2684 for(i = 0; i < decoder->private_->frame.header.blocksize; i++) {
2685 if(!FLAC__bitreader_read_raw_int32(decoder->private_->input, &x, bps))
2686 return false; /* read_callback_ sets the state for us */
2690 /* decode the subframe */
2692 memcpy(decoder->private_->output[channel], subframe->data, sizeof(FLAC__int32) * decoder->private_->frame.header.blocksize);
2697 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)
2699 FLAC__uint32 rice_parameter;
2701 unsigned partition, sample, u;
2702 const unsigned partitions = 1u << partition_order;
2703 const unsigned partition_samples = partition_order > 0? decoder->private_->frame.header.blocksize >> partition_order : decoder->private_->frame.header.blocksize - predictor_order;
2704 const unsigned plen = is_extended? FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE2_PARAMETER_LEN : FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_PARAMETER_LEN;
2705 const unsigned pesc = is_extended? FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE2_ESCAPE_PARAMETER : FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER;
2708 if(partition_order == 0) {
2709 if(decoder->private_->frame.header.blocksize < predictor_order) {
2710 send_error_to_client_(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC);
2711 decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
2716 if(partition_samples < predictor_order) {
2717 send_error_to_client_(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC);
2718 decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
2723 if(!FLAC__format_entropy_coding_method_partitioned_rice_contents_ensure_size(partitioned_rice_contents, flac_max(6u, partition_order))) {
2724 decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
2729 for(partition = 0; partition < partitions; partition++) {
2730 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &rice_parameter, plen))
2731 return false; /* read_callback_ sets the state for us */
2732 partitioned_rice_contents->parameters[partition] = rice_parameter;
2733 if(rice_parameter < pesc) {
2734 partitioned_rice_contents->raw_bits[partition] = 0;
2735 u = (partition_order == 0 || partition > 0)? partition_samples : partition_samples - predictor_order;
2736 if(!decoder->private_->local_bitreader_read_rice_signed_block(decoder->private_->input, residual + sample, u, rice_parameter))
2737 return false; /* read_callback_ sets the state for us */
2741 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &rice_parameter, FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_RAW_LEN))
2742 return false; /* read_callback_ sets the state for us */
2743 partitioned_rice_contents->raw_bits[partition] = rice_parameter;
2744 for(u = (partition_order == 0 || partition > 0)? 0 : predictor_order; u < partition_samples; u++, sample++) {
2745 if(!FLAC__bitreader_read_raw_int32(decoder->private_->input, &i, rice_parameter))
2746 return false; /* read_callback_ sets the state for us */
2747 residual[sample] = i;
2755 FLAC__bool read_zero_padding_(FLAC__StreamDecoder *decoder)
2757 if(!FLAC__bitreader_is_consumed_byte_aligned(decoder->private_->input)) {
2758 FLAC__uint32 zero = 0;
2759 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &zero, FLAC__bitreader_bits_left_for_byte_alignment(decoder->private_->input)))
2760 return false; /* read_callback_ sets the state for us */
2762 send_error_to_client_(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC);
2763 decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
2769 FLAC__bool read_callback_(FLAC__byte buffer[], size_t *bytes, void *client_data)
2771 FLAC__StreamDecoder *decoder = (FLAC__StreamDecoder *)client_data;
2775 /* see [1] HACK NOTE below for why we don't call the eof_callback when decoding Ogg FLAC */
2776 !decoder->private_->is_ogg &&
2778 decoder->private_->eof_callback && decoder->private_->eof_callback(decoder, decoder->private_->client_data)
2781 decoder->protected_->state = FLAC__STREAM_DECODER_END_OF_STREAM;
2784 else if(*bytes > 0) {
2785 /* While seeking, it is possible for our seek to land in the
2786 * middle of audio data that looks exactly like a frame header
2787 * from a future version of an encoder. When that happens, our
2788 * error callback will get an
2789 * FLAC__STREAM_DECODER_UNPARSEABLE_STREAM and increment its
2790 * unparseable_frame_count. But there is a remote possibility
2791 * that it is properly synced at such a "future-codec frame",
2792 * so to make sure, we wait to see many "unparseable" errors in
2793 * a row before bailing out.
2795 if(decoder->private_->is_seeking && decoder->private_->unparseable_frame_count > 20) {
2796 decoder->protected_->state = FLAC__STREAM_DECODER_ABORTED;
2800 const FLAC__StreamDecoderReadStatus status =
2802 decoder->private_->is_ogg?
2803 read_callback_ogg_aspect_(decoder, buffer, bytes) :
2805 decoder->private_->read_callback(decoder, buffer, bytes, decoder->private_->client_data)
2807 if(status == FLAC__STREAM_DECODER_READ_STATUS_ABORT) {
2808 decoder->protected_->state = FLAC__STREAM_DECODER_ABORTED;
2811 else if(*bytes == 0) {
2813 status == FLAC__STREAM_DECODER_READ_STATUS_END_OF_STREAM ||
2816 /* see [1] HACK NOTE below for why we don't call the eof_callback when decoding Ogg FLAC */
2817 !decoder->private_->is_ogg &&
2819 decoder->private_->eof_callback && decoder->private_->eof_callback(decoder, decoder->private_->client_data)
2822 decoder->protected_->state = FLAC__STREAM_DECODER_END_OF_STREAM;
2833 /* abort to avoid a deadlock */
2834 decoder->protected_->state = FLAC__STREAM_DECODER_ABORTED;
2837 /* [1] @@@ HACK NOTE: The end-of-stream checking has to be hacked around
2838 * for Ogg FLAC. This is because the ogg decoder aspect can lose sync
2839 * and at the same time hit the end of the stream (for example, seeking
2840 * to a point that is after the beginning of the last Ogg page). There
2841 * is no way to report an Ogg sync loss through the callbacks (see note
2842 * in read_callback_ogg_aspect_()) so it returns CONTINUE with *bytes==0.
2843 * So to keep the decoder from stopping at this point we gate the call
2844 * to the eof_callback and let the Ogg decoder aspect set the
2845 * end-of-stream state when it is needed.
2850 FLAC__StreamDecoderReadStatus read_callback_ogg_aspect_(const FLAC__StreamDecoder *decoder, FLAC__byte buffer[], size_t *bytes)
2852 switch(FLAC__ogg_decoder_aspect_read_callback_wrapper(&decoder->protected_->ogg_decoder_aspect, buffer, bytes, read_callback_proxy_, decoder, decoder->private_->client_data)) {
2853 case FLAC__OGG_DECODER_ASPECT_READ_STATUS_OK:
2854 return FLAC__STREAM_DECODER_READ_STATUS_CONTINUE;
2855 /* we don't really have a way to handle lost sync via read
2856 * callback so we'll let it pass and let the underlying
2857 * FLAC decoder catch the error
2859 case FLAC__OGG_DECODER_ASPECT_READ_STATUS_LOST_SYNC:
2860 return FLAC__STREAM_DECODER_READ_STATUS_CONTINUE;
2861 case FLAC__OGG_DECODER_ASPECT_READ_STATUS_END_OF_STREAM:
2862 return FLAC__STREAM_DECODER_READ_STATUS_END_OF_STREAM;
2863 case FLAC__OGG_DECODER_ASPECT_READ_STATUS_NOT_FLAC:
2864 case FLAC__OGG_DECODER_ASPECT_READ_STATUS_UNSUPPORTED_MAPPING_VERSION:
2865 case FLAC__OGG_DECODER_ASPECT_READ_STATUS_ABORT:
2866 case FLAC__OGG_DECODER_ASPECT_READ_STATUS_ERROR:
2867 case FLAC__OGG_DECODER_ASPECT_READ_STATUS_MEMORY_ALLOCATION_ERROR:
2868 return FLAC__STREAM_DECODER_READ_STATUS_ABORT;
2871 /* double protection */
2872 return FLAC__STREAM_DECODER_READ_STATUS_ABORT;
2876 FLAC__OggDecoderAspectReadStatus read_callback_proxy_(const void *void_decoder, FLAC__byte buffer[], size_t *bytes, void *client_data)
2878 FLAC__StreamDecoder *decoder = (FLAC__StreamDecoder*)void_decoder;
2880 switch(decoder->private_->read_callback(decoder, buffer, bytes, client_data)) {
2881 case FLAC__STREAM_DECODER_READ_STATUS_CONTINUE:
2882 return FLAC__OGG_DECODER_ASPECT_READ_STATUS_OK;
2883 case FLAC__STREAM_DECODER_READ_STATUS_END_OF_STREAM:
2884 return FLAC__OGG_DECODER_ASPECT_READ_STATUS_END_OF_STREAM;
2885 case FLAC__STREAM_DECODER_READ_STATUS_ABORT:
2886 return FLAC__OGG_DECODER_ASPECT_READ_STATUS_ABORT;
2888 /* double protection: */
2890 return FLAC__OGG_DECODER_ASPECT_READ_STATUS_ABORT;
2895 FLAC__StreamDecoderWriteStatus write_audio_frame_to_client_(FLAC__StreamDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 * const buffer[])
2897 if(decoder->private_->is_seeking) {
2898 FLAC__uint64 this_frame_sample = frame->header.number.sample_number;
2899 FLAC__uint64 next_frame_sample = this_frame_sample + (FLAC__uint64)frame->header.blocksize;
2900 FLAC__uint64 target_sample = decoder->private_->target_sample;
2902 FLAC__ASSERT(frame->header.number_type == FLAC__FRAME_NUMBER_TYPE_SAMPLE_NUMBER);
2905 decoder->private_->got_a_frame = true;
2907 decoder->private_->last_frame = *frame; /* save the frame */
2908 if(this_frame_sample <= target_sample && target_sample < next_frame_sample) { /* we hit our target frame */
2909 unsigned delta = (unsigned)(target_sample - this_frame_sample);
2910 /* kick out of seek mode */
2911 decoder->private_->is_seeking = false;
2912 /* shift out the samples before target_sample */
2915 const FLAC__int32 *newbuffer[FLAC__MAX_CHANNELS];
2916 for(channel = 0; channel < frame->header.channels; channel++)
2917 newbuffer[channel] = buffer[channel] + delta;
2918 decoder->private_->last_frame.header.blocksize -= delta;
2919 decoder->private_->last_frame.header.number.sample_number += (FLAC__uint64)delta;
2920 /* write the relevant samples */
2921 return decoder->private_->write_callback(decoder, &decoder->private_->last_frame, newbuffer, decoder->private_->client_data);
2924 /* write the relevant samples */
2925 return decoder->private_->write_callback(decoder, frame, buffer, decoder->private_->client_data);
2929 return FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE;
2934 * If we never got STREAMINFO, turn off MD5 checking to save
2935 * cycles since we don't have a sum to compare to anyway
2937 if(!decoder->private_->has_stream_info)
2938 decoder->private_->do_md5_checking = false;
2939 if(decoder->private_->do_md5_checking) {
2940 if(!FLAC__MD5Accumulate(&decoder->private_->md5context, buffer, frame->header.channels, frame->header.blocksize, (frame->header.bits_per_sample+7) / 8))
2941 return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT;
2943 return decoder->private_->write_callback(decoder, frame, buffer, decoder->private_->client_data);
2947 void send_error_to_client_(const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status)
2949 if(!decoder->private_->is_seeking)
2950 decoder->private_->error_callback(decoder, status, decoder->private_->client_data);
2951 else if(status == FLAC__STREAM_DECODER_ERROR_STATUS_UNPARSEABLE_STREAM)
2952 decoder->private_->unparseable_frame_count++;
2955 FLAC__bool seek_to_absolute_sample_(FLAC__StreamDecoder *decoder, FLAC__uint64 stream_length, FLAC__uint64 target_sample)
2957 FLAC__uint64 first_frame_offset = decoder->private_->first_frame_offset, lower_bound, upper_bound, lower_bound_sample, upper_bound_sample, this_frame_sample;
2958 FLAC__int64 pos = -1;
2960 unsigned approx_bytes_per_frame;
2961 FLAC__bool first_seek = true;
2962 const FLAC__uint64 total_samples = FLAC__stream_decoder_get_total_samples(decoder);
2963 const unsigned min_blocksize = decoder->private_->stream_info.data.stream_info.min_blocksize;
2964 const unsigned max_blocksize = decoder->private_->stream_info.data.stream_info.max_blocksize;
2965 const unsigned max_framesize = decoder->private_->stream_info.data.stream_info.max_framesize;
2966 const unsigned min_framesize = decoder->private_->stream_info.data.stream_info.min_framesize;
2967 /* take these from the current frame in case they've changed mid-stream */
2968 unsigned channels = FLAC__stream_decoder_get_channels(decoder);
2969 unsigned bps = FLAC__stream_decoder_get_bits_per_sample(decoder);
2970 const FLAC__StreamMetadata_SeekTable *seek_table = decoder->private_->has_seek_table? &decoder->private_->seek_table.data.seek_table : 0;
2972 /* use values from stream info if we didn't decode a frame */
2974 channels = decoder->private_->stream_info.data.stream_info.channels;
2976 bps = decoder->private_->stream_info.data.stream_info.bits_per_sample;
2978 /* we are just guessing here */
2979 if(max_framesize > 0)
2980 approx_bytes_per_frame = (max_framesize + min_framesize) / 2 + 1;
2982 * Check if it's a known fixed-blocksize stream. Note that though
2983 * the spec doesn't allow zeroes in the STREAMINFO block, we may
2984 * never get a STREAMINFO block when decoding so the value of
2985 * min_blocksize might be zero.
2987 else if(min_blocksize == max_blocksize && min_blocksize > 0) {
2988 /* note there are no () around 'bps/8' to keep precision up since it's an integer calulation */
2989 approx_bytes_per_frame = min_blocksize * channels * bps/8 + 64;
2992 approx_bytes_per_frame = 4096 * channels * bps/8 + 64;
2995 * First, we set an upper and lower bound on where in the
2996 * stream we will search. For now we assume the worst case
2997 * scenario, which is our best guess at the beginning of
2998 * the first frame and end of the stream.
3000 lower_bound = first_frame_offset;
3001 lower_bound_sample = 0;
3002 upper_bound = stream_length;
3003 upper_bound_sample = total_samples > 0 ? total_samples : target_sample /*estimate it*/;
3006 * Now we refine the bounds if we have a seektable with
3007 * suitable points. Note that according to the spec they
3008 * must be ordered by ascending sample number.
3010 * Note: to protect against invalid seek tables we will ignore points
3011 * that have frame_samples==0 or sample_number>=total_samples
3014 FLAC__uint64 new_lower_bound = lower_bound;
3015 FLAC__uint64 new_upper_bound = upper_bound;
3016 FLAC__uint64 new_lower_bound_sample = lower_bound_sample;
3017 FLAC__uint64 new_upper_bound_sample = upper_bound_sample;
3019 /* find the closest seek point <= target_sample, if it exists */
3020 for(i = (int)seek_table->num_points - 1; i >= 0; i--) {
3022 seek_table->points[i].sample_number != FLAC__STREAM_METADATA_SEEKPOINT_PLACEHOLDER &&
3023 seek_table->points[i].frame_samples > 0 && /* defense against bad seekpoints */
3024 (total_samples <= 0 || seek_table->points[i].sample_number < total_samples) && /* defense against bad seekpoints */
3025 seek_table->points[i].sample_number <= target_sample
3029 if(i >= 0) { /* i.e. we found a suitable seek point... */
3030 new_lower_bound = first_frame_offset + seek_table->points[i].stream_offset;
3031 new_lower_bound_sample = seek_table->points[i].sample_number;
3034 /* find the closest seek point > target_sample, if it exists */
3035 for(i = 0; i < (int)seek_table->num_points; i++) {
3037 seek_table->points[i].sample_number != FLAC__STREAM_METADATA_SEEKPOINT_PLACEHOLDER &&
3038 seek_table->points[i].frame_samples > 0 && /* defense against bad seekpoints */
3039 (total_samples <= 0 || seek_table->points[i].sample_number < total_samples) && /* defense against bad seekpoints */
3040 seek_table->points[i].sample_number > target_sample
3044 if(i < (int)seek_table->num_points) { /* i.e. we found a suitable seek point... */
3045 new_upper_bound = first_frame_offset + seek_table->points[i].stream_offset;
3046 new_upper_bound_sample = seek_table->points[i].sample_number;
3048 /* final protection against unsorted seek tables; keep original values if bogus */
3049 if(new_upper_bound >= new_lower_bound) {
3050 lower_bound = new_lower_bound;
3051 upper_bound = new_upper_bound;
3052 lower_bound_sample = new_lower_bound_sample;
3053 upper_bound_sample = new_upper_bound_sample;
3057 FLAC__ASSERT(upper_bound_sample >= lower_bound_sample);
3058 /* there are 2 insidious ways that the following equality occurs, which
3060 * 1) total_samples is 0 (unknown) and target_sample is 0
3061 * 2) total_samples is 0 (unknown) and target_sample happens to be
3062 * exactly equal to the last seek point in the seek table; this
3063 * means there is no seek point above it, and upper_bound_samples
3064 * remains equal to the estimate (of target_samples) we made above
3065 * in either case it does not hurt to move upper_bound_sample up by 1
3067 if(upper_bound_sample == lower_bound_sample)
3068 upper_bound_sample++;
3070 decoder->private_->target_sample = target_sample;
3072 /* check if the bounds are still ok */
3073 if (lower_bound_sample >= upper_bound_sample || lower_bound > upper_bound) {
3074 decoder->protected_->state = FLAC__STREAM_DECODER_SEEK_ERROR;
3077 #ifndef FLAC__INTEGER_ONLY_LIBRARY
3078 #if defined _MSC_VER || defined __MINGW32__
3079 /* with VC++ you have to spoon feed it the casting */
3080 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;
3082 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;
3085 /* a little less accurate: */
3086 if(upper_bound - lower_bound < 0xffffffff)
3087 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;
3088 else /* @@@ WATCHOUT, ~2TB limit */
3089 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;
3091 if(pos >= (FLAC__int64)upper_bound)
3092 pos = (FLAC__int64)upper_bound - 1;
3093 if(pos < (FLAC__int64)lower_bound)
3094 pos = (FLAC__int64)lower_bound;
3095 if(decoder->private_->seek_callback(decoder, (FLAC__uint64)pos, decoder->private_->client_data) != FLAC__STREAM_DECODER_SEEK_STATUS_OK) {
3096 decoder->protected_->state = FLAC__STREAM_DECODER_SEEK_ERROR;
3099 if(!FLAC__stream_decoder_flush(decoder)) {
3100 /* above call sets the state for us */
3103 /* Now we need to get a frame. First we need to reset our
3104 * unparseable_frame_count; if we get too many unparseable
3105 * frames in a row, the read callback will return
3106 * FLAC__STREAM_DECODER_READ_STATUS_ABORT, causing
3107 * FLAC__stream_decoder_process_single() to return false.
3109 decoder->private_->unparseable_frame_count = 0;
3110 if(!FLAC__stream_decoder_process_single(decoder)) {
3111 decoder->protected_->state = FLAC__STREAM_DECODER_SEEK_ERROR;
3114 /* our write callback will change the state when it gets to the target frame */
3115 /* 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 */
3117 /*@@@@@@ used to be the following; not clear if the check for end of stream is needed anymore */
3118 if(decoder->protected_->state != FLAC__SEEKABLE_STREAM_DECODER_SEEKING && decoder->protected_->state != FLAC__STREAM_DECODER_END_OF_STREAM)
3121 if(!decoder->private_->is_seeking)
3124 FLAC__ASSERT(decoder->private_->last_frame.header.number_type == FLAC__FRAME_NUMBER_TYPE_SAMPLE_NUMBER);
3125 this_frame_sample = decoder->private_->last_frame.header.number.sample_number;
3127 if (0 == decoder->private_->samples_decoded || (this_frame_sample + decoder->private_->last_frame.header.blocksize >= upper_bound_sample && !first_seek)) {
3128 if (pos == (FLAC__int64)lower_bound) {
3129 /* can't move back any more than the first frame, something is fatally wrong */
3130 decoder->protected_->state = FLAC__STREAM_DECODER_SEEK_ERROR;
3133 /* our last move backwards wasn't big enough, try again */
3134 approx_bytes_per_frame = approx_bytes_per_frame? approx_bytes_per_frame * 2 : 16;
3137 /* allow one seek over upper bound, so we can get a correct upper_bound_sample for streams with unknown total_samples */
3140 /* make sure we are not seeking in corrupted stream */
3141 if (this_frame_sample < lower_bound_sample) {
3142 decoder->protected_->state = FLAC__STREAM_DECODER_SEEK_ERROR;
3146 /* we need to narrow the search */
3147 if(target_sample < this_frame_sample) {
3148 upper_bound_sample = this_frame_sample + decoder->private_->last_frame.header.blocksize;
3149 /*@@@@@@ what will decode position be if at end of stream? */
3150 if(!FLAC__stream_decoder_get_decode_position(decoder, &upper_bound)) {
3151 decoder->protected_->state = FLAC__STREAM_DECODER_SEEK_ERROR;
3154 approx_bytes_per_frame = (unsigned)(2 * (upper_bound - pos) / 3 + 16);
3156 else { /* target_sample >= this_frame_sample + this frame's blocksize */
3157 lower_bound_sample = this_frame_sample + decoder->private_->last_frame.header.blocksize;
3158 if(!FLAC__stream_decoder_get_decode_position(decoder, &lower_bound)) {
3159 decoder->protected_->state = FLAC__STREAM_DECODER_SEEK_ERROR;
3162 approx_bytes_per_frame = (unsigned)(2 * (lower_bound - pos) / 3 + 16);
3170 FLAC__bool seek_to_absolute_sample_ogg_(FLAC__StreamDecoder *decoder, FLAC__uint64 stream_length, FLAC__uint64 target_sample)
3172 FLAC__uint64 left_pos = 0, right_pos = stream_length;
3173 FLAC__uint64 left_sample = 0, right_sample = FLAC__stream_decoder_get_total_samples(decoder);
3174 FLAC__uint64 this_frame_sample = (FLAC__uint64)0 - 1;
3175 FLAC__uint64 pos = 0; /* only initialized to avoid compiler warning */
3176 FLAC__bool did_a_seek;
3177 unsigned iteration = 0;
3179 /* In the first iterations, we will calculate the target byte position
3180 * by the distance from the target sample to left_sample and
3181 * right_sample (let's call it "proportional search"). After that, we
3182 * will switch to binary search.
3184 unsigned BINARY_SEARCH_AFTER_ITERATION = 2;
3186 /* We will switch to a linear search once our current sample is less
3187 * than this number of samples ahead of the target sample
3189 static const FLAC__uint64 LINEAR_SEARCH_WITHIN_SAMPLES = FLAC__MAX_BLOCK_SIZE * 2;
3191 /* If the total number of samples is unknown, use a large value, and
3192 * force binary search immediately.
3194 if(right_sample == 0) {
3195 right_sample = (FLAC__uint64)(-1);
3196 BINARY_SEARCH_AFTER_ITERATION = 0;
3199 decoder->private_->target_sample = target_sample;
3200 for( ; ; iteration++) {
3201 if (iteration == 0 || this_frame_sample > target_sample || target_sample - this_frame_sample > LINEAR_SEARCH_WITHIN_SAMPLES) {
3202 if (iteration >= BINARY_SEARCH_AFTER_ITERATION) {
3203 pos = (right_pos + left_pos) / 2;
3206 #ifndef FLAC__INTEGER_ONLY_LIBRARY
3207 #if defined _MSC_VER || defined __MINGW32__
3208 /* with MSVC you have to spoon feed it the casting */
3209 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));
3211 pos = (FLAC__uint64)((FLAC__double)(target_sample - left_sample) / (FLAC__double)(right_sample - left_sample) * (FLAC__double)(right_pos - left_pos));
3214 /* a little less accurate: */
3215 if ((target_sample-left_sample <= 0xffffffff) && (right_pos-left_pos <= 0xffffffff))
3216 pos = (FLAC__int64)(((target_sample-left_sample) * (right_pos-left_pos)) / (right_sample-left_sample));
3217 else /* @@@ WATCHOUT, ~2TB limit */
3218 pos = (FLAC__int64)((((target_sample-left_sample)>>8) * ((right_pos-left_pos)>>8)) / ((right_sample-left_sample)>>16));
3220 /* @@@ TODO: might want to limit pos to some distance
3221 * before EOF, to make sure we land before the last frame,
3222 * thereby getting a this_frame_sample and so having a better
3228 if(decoder->private_->seek_callback((FLAC__StreamDecoder*)decoder, (FLAC__uint64)pos, decoder->private_->client_data) != FLAC__STREAM_DECODER_SEEK_STATUS_OK) {
3229 decoder->protected_->state = FLAC__STREAM_DECODER_SEEK_ERROR;
3232 if(!FLAC__stream_decoder_flush(decoder)) {
3233 /* above call sets the state for us */
3241 decoder->private_->got_a_frame = false;
3242 if(!FLAC__stream_decoder_process_single(decoder)) {
3243 decoder->protected_->state = FLAC__STREAM_DECODER_SEEK_ERROR;
3246 if(!decoder->private_->got_a_frame) {
3248 /* this can happen if we seek to a point after the last frame; we drop
3249 * to binary search right away in this case to avoid any wasted
3250 * iterations of proportional search.
3253 BINARY_SEARCH_AFTER_ITERATION = 0;
3256 /* this can probably only happen if total_samples is unknown and the
3257 * target_sample is past the end of the stream
3259 decoder->protected_->state = FLAC__STREAM_DECODER_SEEK_ERROR;
3263 /* our write callback will change the state when it gets to the target frame */
3264 else if(!decoder->private_->is_seeking) {
3268 this_frame_sample = decoder->private_->last_frame.header.number.sample_number;
3269 FLAC__ASSERT(decoder->private_->last_frame.header.number_type == FLAC__FRAME_NUMBER_TYPE_SAMPLE_NUMBER);
3272 if (this_frame_sample <= target_sample) {
3273 /* The 'equal' case should not happen, since
3274 * FLAC__stream_decoder_process_single()
3275 * should recognize that it has hit the
3276 * target sample and we would exit through
3277 * the 'break' above.
3279 FLAC__ASSERT(this_frame_sample != target_sample);
3281 left_sample = this_frame_sample;
3282 /* sanity check to avoid infinite loop */
3283 if (left_pos == pos) {
3284 decoder->protected_->state = FLAC__STREAM_DECODER_SEEK_ERROR;
3289 else if(this_frame_sample > target_sample) {
3290 right_sample = this_frame_sample;
3291 /* sanity check to avoid infinite loop */
3292 if (right_pos == pos) {
3293 decoder->protected_->state = FLAC__STREAM_DECODER_SEEK_ERROR;
3306 FLAC__StreamDecoderReadStatus file_read_callback_(const FLAC__StreamDecoder *decoder, FLAC__byte buffer[], size_t *bytes, void *client_data)
3311 *bytes = fread(buffer, sizeof(FLAC__byte), *bytes, decoder->private_->file);
3312 if(ferror(decoder->private_->file))
3313 return FLAC__STREAM_DECODER_READ_STATUS_ABORT;
3314 else if(*bytes == 0)
3315 return FLAC__STREAM_DECODER_READ_STATUS_END_OF_STREAM;
3317 return FLAC__STREAM_DECODER_READ_STATUS_CONTINUE;
3320 return FLAC__STREAM_DECODER_READ_STATUS_ABORT; /* abort to avoid a deadlock */
3323 FLAC__StreamDecoderSeekStatus file_seek_callback_(const FLAC__StreamDecoder *decoder, FLAC__uint64 absolute_byte_offset, void *client_data)
3327 if(decoder->private_->file == stdin)
3328 return FLAC__STREAM_DECODER_SEEK_STATUS_UNSUPPORTED;
3329 else if(fseeko(decoder->private_->file, (FLAC__off_t)absolute_byte_offset, SEEK_SET) < 0)
3330 return FLAC__STREAM_DECODER_SEEK_STATUS_ERROR;
3332 return FLAC__STREAM_DECODER_SEEK_STATUS_OK;
3335 FLAC__StreamDecoderTellStatus file_tell_callback_(const FLAC__StreamDecoder *decoder, FLAC__uint64 *absolute_byte_offset, void *client_data)
3340 if(decoder->private_->file == stdin)
3341 return FLAC__STREAM_DECODER_TELL_STATUS_UNSUPPORTED;
3342 else if((pos = ftello(decoder->private_->file)) < 0)
3343 return FLAC__STREAM_DECODER_TELL_STATUS_ERROR;
3345 *absolute_byte_offset = (FLAC__uint64)pos;
3346 return FLAC__STREAM_DECODER_TELL_STATUS_OK;
3350 FLAC__StreamDecoderLengthStatus file_length_callback_(const FLAC__StreamDecoder *decoder, FLAC__uint64 *stream_length, void *client_data)
3352 struct flac_stat_s filestats;
3355 if(decoder->private_->file == stdin)
3356 return FLAC__STREAM_DECODER_LENGTH_STATUS_UNSUPPORTED;
3357 else if(flac_fstat(fileno(decoder->private_->file), &filestats) != 0)
3358 return FLAC__STREAM_DECODER_LENGTH_STATUS_ERROR;
3360 *stream_length = (FLAC__uint64)filestats.st_size;
3361 return FLAC__STREAM_DECODER_LENGTH_STATUS_OK;
3365 FLAC__bool file_eof_callback_(const FLAC__StreamDecoder *decoder, void *client_data)
3369 return feof(decoder->private_->file)? true : false;