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 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]) {
1368 if(x == ID3V2_TAG_[id]) {
1372 if(!skip_id3v2_tag_(decoder))
1373 return false; /* skip_id3v2_tag_ sets the state for us */
1378 if(x == 0xff) { /* MAGIC NUMBER for the first 8 frame sync bits */
1379 decoder->private_->header_warmup[0] = (FLAC__byte)x;
1380 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, 8))
1381 return false; /* read_callback_ sets the state for us */
1383 /* 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 */
1384 /* else we have to check if the second byte is the end of a sync code */
1385 if(x == 0xff) { /* MAGIC NUMBER for the first 8 frame sync bits */
1386 decoder->private_->lookahead = (FLAC__byte)x;
1387 decoder->private_->cached = true;
1389 else if(x >> 1 == 0x7c) { /* MAGIC NUMBER for the last 6 sync bits and reserved 7th bit */
1390 decoder->private_->header_warmup[1] = (FLAC__byte)x;
1391 decoder->protected_->state = FLAC__STREAM_DECODER_READ_FRAME;
1397 send_error_to_client_(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC);
1402 decoder->protected_->state = FLAC__STREAM_DECODER_READ_METADATA;
1406 FLAC__bool read_metadata_(FLAC__StreamDecoder *decoder)
1409 FLAC__uint32 i, x, type, length;
1411 FLAC__ASSERT(FLAC__bitreader_is_consumed_byte_aligned(decoder->private_->input));
1413 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_IS_LAST_LEN))
1414 return false; /* read_callback_ sets the state for us */
1415 is_last = x? true : false;
1417 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &type, FLAC__STREAM_METADATA_TYPE_LEN))
1418 return false; /* read_callback_ sets the state for us */
1420 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &length, FLAC__STREAM_METADATA_LENGTH_LEN))
1421 return false; /* read_callback_ sets the state for us */
1423 if(type == FLAC__METADATA_TYPE_STREAMINFO) {
1424 if(!read_metadata_streaminfo_(decoder, is_last, length))
1427 decoder->private_->has_stream_info = true;
1428 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))
1429 decoder->private_->do_md5_checking = false;
1430 if(!decoder->private_->is_seeking && decoder->private_->metadata_filter[FLAC__METADATA_TYPE_STREAMINFO] && decoder->private_->metadata_callback)
1431 decoder->private_->metadata_callback(decoder, &decoder->private_->stream_info, decoder->private_->client_data);
1433 else if(type == FLAC__METADATA_TYPE_SEEKTABLE) {
1434 if(!read_metadata_seektable_(decoder, is_last, length))
1437 decoder->private_->has_seek_table = true;
1438 if(!decoder->private_->is_seeking && decoder->private_->metadata_filter[FLAC__METADATA_TYPE_SEEKTABLE] && decoder->private_->metadata_callback)
1439 decoder->private_->metadata_callback(decoder, &decoder->private_->seek_table, decoder->private_->client_data);
1442 FLAC__bool skip_it = !decoder->private_->metadata_filter[type];
1443 unsigned real_length = length;
1444 FLAC__StreamMetadata block;
1446 block.is_last = is_last;
1447 block.type = (FLAC__MetadataType)type;
1448 block.length = length;
1450 if(type == FLAC__METADATA_TYPE_APPLICATION) {
1451 if(!FLAC__bitreader_read_byte_block_aligned_no_crc(decoder->private_->input, block.data.application.id, FLAC__STREAM_METADATA_APPLICATION_ID_LEN/8))
1452 return false; /* read_callback_ sets the state for us */
1454 if(real_length < FLAC__STREAM_METADATA_APPLICATION_ID_LEN/8) { /* underflow check */
1455 decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;/*@@@@@@ maybe wrong error? need to resync?*/
1459 real_length -= FLAC__STREAM_METADATA_APPLICATION_ID_LEN/8;
1461 if(decoder->private_->metadata_filter_ids_count > 0 && has_id_filtered_(decoder, block.data.application.id))
1466 if(!FLAC__bitreader_skip_byte_block_aligned_no_crc(decoder->private_->input, real_length))
1467 return false; /* read_callback_ sets the state for us */
1471 case FLAC__METADATA_TYPE_PADDING:
1472 /* skip the padding bytes */
1473 if(!FLAC__bitreader_skip_byte_block_aligned_no_crc(decoder->private_->input, real_length))
1474 return false; /* read_callback_ sets the state for us */
1476 case FLAC__METADATA_TYPE_APPLICATION:
1477 /* remember, we read the ID already */
1478 if(real_length > 0) {
1479 if(0 == (block.data.application.data = malloc(real_length))) {
1480 decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
1483 if(!FLAC__bitreader_read_byte_block_aligned_no_crc(decoder->private_->input, block.data.application.data, real_length))
1484 return false; /* read_callback_ sets the state for us */
1487 block.data.application.data = 0;
1489 case FLAC__METADATA_TYPE_VORBIS_COMMENT:
1490 if(!read_metadata_vorbiscomment_(decoder, &block.data.vorbis_comment))
1493 case FLAC__METADATA_TYPE_CUESHEET:
1494 if(!read_metadata_cuesheet_(decoder, &block.data.cue_sheet))
1497 case FLAC__METADATA_TYPE_PICTURE:
1498 if(!read_metadata_picture_(decoder, &block.data.picture))
1501 case FLAC__METADATA_TYPE_STREAMINFO:
1502 case FLAC__METADATA_TYPE_SEEKTABLE:
1506 if(real_length > 0) {
1507 if(0 == (block.data.unknown.data = malloc(real_length))) {
1508 decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
1511 if(!FLAC__bitreader_read_byte_block_aligned_no_crc(decoder->private_->input, block.data.unknown.data, real_length))
1512 return false; /* read_callback_ sets the state for us */
1515 block.data.unknown.data = 0;
1518 if(!decoder->private_->is_seeking && decoder->private_->metadata_callback)
1519 decoder->private_->metadata_callback(decoder, &block, decoder->private_->client_data);
1521 /* now we have to free any malloc()ed data in the block */
1523 case FLAC__METADATA_TYPE_PADDING:
1525 case FLAC__METADATA_TYPE_APPLICATION:
1526 if(0 != block.data.application.data)
1527 free(block.data.application.data);
1529 case FLAC__METADATA_TYPE_VORBIS_COMMENT:
1530 if(0 != block.data.vorbis_comment.vendor_string.entry)
1531 free(block.data.vorbis_comment.vendor_string.entry);
1532 if(block.data.vorbis_comment.num_comments > 0)
1533 for(i = 0; i < block.data.vorbis_comment.num_comments; i++)
1534 if(0 != block.data.vorbis_comment.comments[i].entry)
1535 free(block.data.vorbis_comment.comments[i].entry);
1536 if(0 != block.data.vorbis_comment.comments)
1537 free(block.data.vorbis_comment.comments);
1539 case FLAC__METADATA_TYPE_CUESHEET:
1540 if(block.data.cue_sheet.num_tracks > 0)
1541 for(i = 0; i < block.data.cue_sheet.num_tracks; i++)
1542 if(0 != block.data.cue_sheet.tracks[i].indices)
1543 free(block.data.cue_sheet.tracks[i].indices);
1544 if(0 != block.data.cue_sheet.tracks)
1545 free(block.data.cue_sheet.tracks);
1547 case FLAC__METADATA_TYPE_PICTURE:
1548 if(0 != block.data.picture.mime_type)
1549 free(block.data.picture.mime_type);
1550 if(0 != block.data.picture.description)
1551 free(block.data.picture.description);
1552 if(0 != block.data.picture.data)
1553 free(block.data.picture.data);
1555 case FLAC__METADATA_TYPE_STREAMINFO:
1556 case FLAC__METADATA_TYPE_SEEKTABLE:
1559 if(0 != block.data.unknown.data)
1560 free(block.data.unknown.data);
1567 /* if this fails, it's OK, it's just a hint for the seek routine */
1568 if(!FLAC__stream_decoder_get_decode_position(decoder, &decoder->private_->first_frame_offset))
1569 decoder->private_->first_frame_offset = 0;
1570 decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
1576 FLAC__bool read_metadata_streaminfo_(FLAC__StreamDecoder *decoder, FLAC__bool is_last, unsigned length)
1579 unsigned bits, used_bits = 0;
1581 FLAC__ASSERT(FLAC__bitreader_is_consumed_byte_aligned(decoder->private_->input));
1583 decoder->private_->stream_info.type = FLAC__METADATA_TYPE_STREAMINFO;
1584 decoder->private_->stream_info.is_last = is_last;
1585 decoder->private_->stream_info.length = length;
1587 bits = FLAC__STREAM_METADATA_STREAMINFO_MIN_BLOCK_SIZE_LEN;
1588 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, bits))
1589 return false; /* read_callback_ sets the state for us */
1590 decoder->private_->stream_info.data.stream_info.min_blocksize = x;
1593 bits = FLAC__STREAM_METADATA_STREAMINFO_MAX_BLOCK_SIZE_LEN;
1594 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_STREAMINFO_MAX_BLOCK_SIZE_LEN))
1595 return false; /* read_callback_ sets the state for us */
1596 decoder->private_->stream_info.data.stream_info.max_blocksize = x;
1599 bits = FLAC__STREAM_METADATA_STREAMINFO_MIN_FRAME_SIZE_LEN;
1600 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_STREAMINFO_MIN_FRAME_SIZE_LEN))
1601 return false; /* read_callback_ sets the state for us */
1602 decoder->private_->stream_info.data.stream_info.min_framesize = x;
1605 bits = FLAC__STREAM_METADATA_STREAMINFO_MAX_FRAME_SIZE_LEN;
1606 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_STREAMINFO_MAX_FRAME_SIZE_LEN))
1607 return false; /* read_callback_ sets the state for us */
1608 decoder->private_->stream_info.data.stream_info.max_framesize = x;
1611 bits = FLAC__STREAM_METADATA_STREAMINFO_SAMPLE_RATE_LEN;
1612 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_STREAMINFO_SAMPLE_RATE_LEN))
1613 return false; /* read_callback_ sets the state for us */
1614 decoder->private_->stream_info.data.stream_info.sample_rate = x;
1617 bits = FLAC__STREAM_METADATA_STREAMINFO_CHANNELS_LEN;
1618 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_STREAMINFO_CHANNELS_LEN))
1619 return false; /* read_callback_ sets the state for us */
1620 decoder->private_->stream_info.data.stream_info.channels = x+1;
1623 bits = FLAC__STREAM_METADATA_STREAMINFO_BITS_PER_SAMPLE_LEN;
1624 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_STREAMINFO_BITS_PER_SAMPLE_LEN))
1625 return false; /* read_callback_ sets the state for us */
1626 decoder->private_->stream_info.data.stream_info.bits_per_sample = x+1;
1629 bits = FLAC__STREAM_METADATA_STREAMINFO_TOTAL_SAMPLES_LEN;
1630 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))
1631 return false; /* read_callback_ sets the state for us */
1634 if(!FLAC__bitreader_read_byte_block_aligned_no_crc(decoder->private_->input, decoder->private_->stream_info.data.stream_info.md5sum, 16))
1635 return false; /* read_callback_ sets the state for us */
1638 /* skip the rest of the block */
1639 FLAC__ASSERT(used_bits % 8 == 0);
1640 length -= (used_bits / 8);
1641 if(!FLAC__bitreader_skip_byte_block_aligned_no_crc(decoder->private_->input, length))
1642 return false; /* read_callback_ sets the state for us */
1647 FLAC__bool read_metadata_seektable_(FLAC__StreamDecoder *decoder, FLAC__bool is_last, unsigned length)
1652 FLAC__ASSERT(FLAC__bitreader_is_consumed_byte_aligned(decoder->private_->input));
1654 decoder->private_->seek_table.type = FLAC__METADATA_TYPE_SEEKTABLE;
1655 decoder->private_->seek_table.is_last = is_last;
1656 decoder->private_->seek_table.length = length;
1658 decoder->private_->seek_table.data.seek_table.num_points = length / FLAC__STREAM_METADATA_SEEKPOINT_LENGTH;
1660 /* use realloc since we may pass through here several times (e.g. after seeking) */
1661 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)))) {
1662 decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
1665 for(i = 0; i < decoder->private_->seek_table.data.seek_table.num_points; i++) {
1666 if(!FLAC__bitreader_read_raw_uint64(decoder->private_->input, &xx, FLAC__STREAM_METADATA_SEEKPOINT_SAMPLE_NUMBER_LEN))
1667 return false; /* read_callback_ sets the state for us */
1668 decoder->private_->seek_table.data.seek_table.points[i].sample_number = xx;
1670 if(!FLAC__bitreader_read_raw_uint64(decoder->private_->input, &xx, FLAC__STREAM_METADATA_SEEKPOINT_STREAM_OFFSET_LEN))
1671 return false; /* read_callback_ sets the state for us */
1672 decoder->private_->seek_table.data.seek_table.points[i].stream_offset = xx;
1674 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_SEEKPOINT_FRAME_SAMPLES_LEN))
1675 return false; /* read_callback_ sets the state for us */
1676 decoder->private_->seek_table.data.seek_table.points[i].frame_samples = x;
1678 length -= (decoder->private_->seek_table.data.seek_table.num_points * FLAC__STREAM_METADATA_SEEKPOINT_LENGTH);
1679 /* if there is a partial point left, skip over it */
1681 /*@@@ do a send_error_to_client_() here? there's an argument for either way */
1682 if(!FLAC__bitreader_skip_byte_block_aligned_no_crc(decoder->private_->input, length))
1683 return false; /* read_callback_ sets the state for us */
1689 FLAC__bool read_metadata_vorbiscomment_(FLAC__StreamDecoder *decoder, FLAC__StreamMetadata_VorbisComment *obj)
1693 FLAC__ASSERT(FLAC__bitreader_is_consumed_byte_aligned(decoder->private_->input));
1695 /* read vendor string */
1696 FLAC__ASSERT(FLAC__STREAM_METADATA_VORBIS_COMMENT_ENTRY_LENGTH_LEN == 32);
1697 if(!FLAC__bitreader_read_uint32_little_endian(decoder->private_->input, &obj->vendor_string.length))
1698 return false; /* read_callback_ sets the state for us */
1699 if(obj->vendor_string.length > 0) {
1700 if(0 == (obj->vendor_string.entry = safe_malloc_add_2op_(obj->vendor_string.length, /*+*/1))) {
1701 decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
1704 if(!FLAC__bitreader_read_byte_block_aligned_no_crc(decoder->private_->input, obj->vendor_string.entry, obj->vendor_string.length))
1705 return false; /* read_callback_ sets the state for us */
1706 obj->vendor_string.entry[obj->vendor_string.length] = '\0';
1709 obj->vendor_string.entry = 0;
1711 /* read num comments */
1712 FLAC__ASSERT(FLAC__STREAM_METADATA_VORBIS_COMMENT_NUM_COMMENTS_LEN == 32);
1713 if(!FLAC__bitreader_read_uint32_little_endian(decoder->private_->input, &obj->num_comments))
1714 return false; /* read_callback_ sets the state for us */
1717 if(obj->num_comments > 0) {
1718 if(0 == (obj->comments = safe_malloc_mul_2op_p(obj->num_comments, /*times*/sizeof(FLAC__StreamMetadata_VorbisComment_Entry)))) {
1719 decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
1722 for(i = 0; i < obj->num_comments; i++) {
1723 FLAC__ASSERT(FLAC__STREAM_METADATA_VORBIS_COMMENT_ENTRY_LENGTH_LEN == 32);
1724 if(!FLAC__bitreader_read_uint32_little_endian(decoder->private_->input, &obj->comments[i].length))
1725 return false; /* read_callback_ sets the state for us */
1726 if(obj->comments[i].length > 0) {
1727 if(0 == (obj->comments[i].entry = safe_malloc_add_2op_(obj->comments[i].length, /*+*/1))) {
1728 decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
1731 if(!FLAC__bitreader_read_byte_block_aligned_no_crc(decoder->private_->input, obj->comments[i].entry, obj->comments[i].length))
1732 return false; /* read_callback_ sets the state for us */
1733 obj->comments[i].entry[obj->comments[i].length] = '\0';
1736 obj->comments[i].entry = 0;
1746 FLAC__bool read_metadata_cuesheet_(FLAC__StreamDecoder *decoder, FLAC__StreamMetadata_CueSheet *obj)
1748 FLAC__uint32 i, j, x;
1750 FLAC__ASSERT(FLAC__bitreader_is_consumed_byte_aligned(decoder->private_->input));
1752 memset(obj, 0, sizeof(FLAC__StreamMetadata_CueSheet));
1754 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_MEDIA_CATALOG_NUMBER_LEN % 8 == 0);
1755 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))
1756 return false; /* read_callback_ sets the state for us */
1758 if(!FLAC__bitreader_read_raw_uint64(decoder->private_->input, &obj->lead_in, FLAC__STREAM_METADATA_CUESHEET_LEAD_IN_LEN))
1759 return false; /* read_callback_ sets the state for us */
1761 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_CUESHEET_IS_CD_LEN))
1762 return false; /* read_callback_ sets the state for us */
1763 obj->is_cd = x? true : false;
1765 if(!FLAC__bitreader_skip_bits_no_crc(decoder->private_->input, FLAC__STREAM_METADATA_CUESHEET_RESERVED_LEN))
1766 return false; /* read_callback_ sets the state for us */
1768 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_CUESHEET_NUM_TRACKS_LEN))
1769 return false; /* read_callback_ sets the state for us */
1770 obj->num_tracks = x;
1772 if(obj->num_tracks > 0) {
1773 if(0 == (obj->tracks = safe_calloc_(obj->num_tracks, sizeof(FLAC__StreamMetadata_CueSheet_Track)))) {
1774 decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
1777 for(i = 0; i < obj->num_tracks; i++) {
1778 FLAC__StreamMetadata_CueSheet_Track *track = &obj->tracks[i];
1779 if(!FLAC__bitreader_read_raw_uint64(decoder->private_->input, &track->offset, FLAC__STREAM_METADATA_CUESHEET_TRACK_OFFSET_LEN))
1780 return false; /* read_callback_ sets the state for us */
1782 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_CUESHEET_TRACK_NUMBER_LEN))
1783 return false; /* read_callback_ sets the state for us */
1784 track->number = (FLAC__byte)x;
1786 FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_ISRC_LEN % 8 == 0);
1787 if(!FLAC__bitreader_read_byte_block_aligned_no_crc(decoder->private_->input, (FLAC__byte*)track->isrc, FLAC__STREAM_METADATA_CUESHEET_TRACK_ISRC_LEN/8))
1788 return false; /* read_callback_ sets the state for us */
1790 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_CUESHEET_TRACK_TYPE_LEN))
1791 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_PRE_EMPHASIS_LEN))
1795 return false; /* read_callback_ sets the state for us */
1796 track->pre_emphasis = x;
1798 if(!FLAC__bitreader_skip_bits_no_crc(decoder->private_->input, FLAC__STREAM_METADATA_CUESHEET_TRACK_RESERVED_LEN))
1799 return false; /* read_callback_ sets the state for us */
1801 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_CUESHEET_TRACK_NUM_INDICES_LEN))
1802 return false; /* read_callback_ sets the state for us */
1803 track->num_indices = (FLAC__byte)x;
1805 if(track->num_indices > 0) {
1806 if(0 == (track->indices = safe_calloc_(track->num_indices, sizeof(FLAC__StreamMetadata_CueSheet_Index)))) {
1807 decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
1810 for(j = 0; j < track->num_indices; j++) {
1811 FLAC__StreamMetadata_CueSheet_Index *indx = &track->indices[j];
1812 if(!FLAC__bitreader_read_raw_uint64(decoder->private_->input, &indx->offset, FLAC__STREAM_METADATA_CUESHEET_INDEX_OFFSET_LEN))
1813 return false; /* read_callback_ sets the state for us */
1815 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_CUESHEET_INDEX_NUMBER_LEN))
1816 return false; /* read_callback_ sets the state for us */
1817 indx->number = (FLAC__byte)x;
1819 if(!FLAC__bitreader_skip_bits_no_crc(decoder->private_->input, FLAC__STREAM_METADATA_CUESHEET_INDEX_RESERVED_LEN))
1820 return false; /* read_callback_ sets the state for us */
1829 FLAC__bool read_metadata_picture_(FLAC__StreamDecoder *decoder, FLAC__StreamMetadata_Picture *obj)
1833 FLAC__ASSERT(FLAC__bitreader_is_consumed_byte_aligned(decoder->private_->input));
1836 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_PICTURE_TYPE_LEN))
1837 return false; /* read_callback_ sets the state for us */
1840 /* read MIME type */
1841 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_PICTURE_MIME_TYPE_LENGTH_LEN))
1842 return false; /* read_callback_ sets the state for us */
1843 if(0 == (obj->mime_type = safe_malloc_add_2op_(x, /*+*/1))) {
1844 decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
1848 if(!FLAC__bitreader_read_byte_block_aligned_no_crc(decoder->private_->input, (FLAC__byte*)obj->mime_type, x))
1849 return false; /* read_callback_ sets the state for us */
1851 obj->mime_type[x] = '\0';
1853 /* read description */
1854 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_PICTURE_DESCRIPTION_LENGTH_LEN))
1855 return false; /* read_callback_ sets the state for us */
1856 if(0 == (obj->description = safe_malloc_add_2op_(x, /*+*/1))) {
1857 decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
1861 if(!FLAC__bitreader_read_byte_block_aligned_no_crc(decoder->private_->input, obj->description, x))
1862 return false; /* read_callback_ sets the state for us */
1864 obj->description[x] = '\0';
1867 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &obj->width, FLAC__STREAM_METADATA_PICTURE_WIDTH_LEN))
1868 return false; /* read_callback_ sets the state for us */
1871 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &obj->height, FLAC__STREAM_METADATA_PICTURE_HEIGHT_LEN))
1872 return false; /* read_callback_ sets the state for us */
1875 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &obj->depth, FLAC__STREAM_METADATA_PICTURE_DEPTH_LEN))
1876 return false; /* read_callback_ sets the state for us */
1879 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &obj->colors, FLAC__STREAM_METADATA_PICTURE_COLORS_LEN))
1880 return false; /* read_callback_ sets the state for us */
1883 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &(obj->data_length), FLAC__STREAM_METADATA_PICTURE_DATA_LENGTH_LEN))
1884 return false; /* read_callback_ sets the state for us */
1885 if(0 == (obj->data = safe_malloc_(obj->data_length))) {
1886 decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
1889 if(obj->data_length > 0) {
1890 if(!FLAC__bitreader_read_byte_block_aligned_no_crc(decoder->private_->input, obj->data, obj->data_length))
1891 return false; /* read_callback_ sets the state for us */
1897 FLAC__bool skip_id3v2_tag_(FLAC__StreamDecoder *decoder)
1902 /* skip the version and flags bytes */
1903 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, 24))
1904 return false; /* read_callback_ sets the state for us */
1905 /* get the size (in bytes) to skip */
1907 for(i = 0; i < 4; i++) {
1908 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, 8))
1909 return false; /* read_callback_ sets the state for us */
1913 /* skip the rest of the tag */
1914 if(!FLAC__bitreader_skip_byte_block_aligned_no_crc(decoder->private_->input, skip))
1915 return false; /* read_callback_ sets the state for us */
1919 FLAC__bool frame_sync_(FLAC__StreamDecoder *decoder)
1922 FLAC__bool first = true;
1924 /* If we know the total number of samples in the stream, stop if we've read that many. */
1925 /* This will stop us, for example, from wasting time trying to sync on an ID3V1 tag. */
1926 if(FLAC__stream_decoder_get_total_samples(decoder) > 0) {
1927 if(decoder->private_->samples_decoded >= FLAC__stream_decoder_get_total_samples(decoder)) {
1928 decoder->protected_->state = FLAC__STREAM_DECODER_END_OF_STREAM;
1933 /* make sure we're byte aligned */
1934 if(!FLAC__bitreader_is_consumed_byte_aligned(decoder->private_->input)) {
1935 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, FLAC__bitreader_bits_left_for_byte_alignment(decoder->private_->input)))
1936 return false; /* read_callback_ sets the state for us */
1940 if(decoder->private_->cached) {
1941 x = (FLAC__uint32)decoder->private_->lookahead;
1942 decoder->private_->cached = false;
1945 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, 8))
1946 return false; /* read_callback_ sets the state for us */
1948 if(x == 0xff) { /* MAGIC NUMBER for the first 8 frame sync bits */
1949 decoder->private_->header_warmup[0] = (FLAC__byte)x;
1950 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, 8))
1951 return false; /* read_callback_ sets the state for us */
1953 /* 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 */
1954 /* else we have to check if the second byte is the end of a sync code */
1955 if(x == 0xff) { /* MAGIC NUMBER for the first 8 frame sync bits */
1956 decoder->private_->lookahead = (FLAC__byte)x;
1957 decoder->private_->cached = true;
1959 else if(x >> 1 == 0x7c) { /* MAGIC NUMBER for the last 6 sync bits and reserved 7th bit */
1960 decoder->private_->header_warmup[1] = (FLAC__byte)x;
1961 decoder->protected_->state = FLAC__STREAM_DECODER_READ_FRAME;
1966 send_error_to_client_(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC);
1974 FLAC__bool read_frame_(FLAC__StreamDecoder *decoder, FLAC__bool *got_a_frame, FLAC__bool do_full_decode)
1978 FLAC__int32 mid, side;
1979 unsigned frame_crc; /* the one we calculate from the input stream */
1982 *got_a_frame = false;
1986 frame_crc = FLAC__CRC16_UPDATE(decoder->private_->header_warmup[0], frame_crc);
1987 frame_crc = FLAC__CRC16_UPDATE(decoder->private_->header_warmup[1], frame_crc);
1988 FLAC__bitreader_reset_read_crc16(decoder->private_->input, (FLAC__uint16)frame_crc);
1990 if(!read_frame_header_(decoder))
1992 if(decoder->protected_->state == FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC) /* means we didn't sync on a valid header */
1994 if(!allocate_output_(decoder, decoder->private_->frame.header.blocksize, decoder->private_->frame.header.channels))
1996 for(channel = 0; channel < decoder->private_->frame.header.channels; channel++) {
1998 * first figure the correct bits-per-sample of the subframe
2000 unsigned bps = decoder->private_->frame.header.bits_per_sample;
2001 switch(decoder->private_->frame.header.channel_assignment) {
2002 case FLAC__CHANNEL_ASSIGNMENT_INDEPENDENT:
2003 /* no adjustment needed */
2005 case FLAC__CHANNEL_ASSIGNMENT_LEFT_SIDE:
2006 FLAC__ASSERT(decoder->private_->frame.header.channels == 2);
2010 case FLAC__CHANNEL_ASSIGNMENT_RIGHT_SIDE:
2011 FLAC__ASSERT(decoder->private_->frame.header.channels == 2);
2015 case FLAC__CHANNEL_ASSIGNMENT_MID_SIDE:
2016 FLAC__ASSERT(decoder->private_->frame.header.channels == 2);
2026 if(!read_subframe_(decoder, channel, bps, do_full_decode))
2028 if(decoder->protected_->state == FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC) /* means bad sync or got corruption */
2031 if(!read_zero_padding_(decoder))
2033 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) */
2037 * Read the frame CRC-16 from the footer and check
2039 frame_crc = FLAC__bitreader_get_read_crc16(decoder->private_->input);
2040 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, FLAC__FRAME_FOOTER_CRC_LEN))
2041 return false; /* read_callback_ sets the state for us */
2042 if(frame_crc == x) {
2043 if(do_full_decode) {
2044 /* Undo any special channel coding */
2045 switch(decoder->private_->frame.header.channel_assignment) {
2046 case FLAC__CHANNEL_ASSIGNMENT_INDEPENDENT:
2049 case FLAC__CHANNEL_ASSIGNMENT_LEFT_SIDE:
2050 FLAC__ASSERT(decoder->private_->frame.header.channels == 2);
2051 for(i = 0; i < decoder->private_->frame.header.blocksize; i++)
2052 decoder->private_->output[1][i] = decoder->private_->output[0][i] - decoder->private_->output[1][i];
2054 case FLAC__CHANNEL_ASSIGNMENT_RIGHT_SIDE:
2055 FLAC__ASSERT(decoder->private_->frame.header.channels == 2);
2056 for(i = 0; i < decoder->private_->frame.header.blocksize; i++)
2057 decoder->private_->output[0][i] += decoder->private_->output[1][i];
2059 case FLAC__CHANNEL_ASSIGNMENT_MID_SIDE:
2060 FLAC__ASSERT(decoder->private_->frame.header.channels == 2);
2061 for(i = 0; i < decoder->private_->frame.header.blocksize; i++) {
2063 mid = decoder->private_->output[0][i];
2064 side = decoder->private_->output[1][i];
2066 mid |= (side & 1); /* i.e. if 'side' is odd... */
2067 decoder->private_->output[0][i] = (mid + side) >> 1;
2068 decoder->private_->output[1][i] = (mid - side) >> 1;
2070 /* OPT: without 'side' temp variable */
2071 mid = (decoder->private_->output[0][i] << 1) | (decoder->private_->output[1][i] & 1); /* i.e. if 'side' is odd... */
2072 decoder->private_->output[0][i] = (mid + decoder->private_->output[1][i]) >> 1;
2073 decoder->private_->output[1][i] = (mid - decoder->private_->output[1][i]) >> 1;
2084 /* Bad frame, emit error and zero the output signal */
2085 send_error_to_client_(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_FRAME_CRC_MISMATCH);
2086 if(do_full_decode) {
2087 for(channel = 0; channel < decoder->private_->frame.header.channels; channel++) {
2088 memset(decoder->private_->output[channel], 0, sizeof(FLAC__int32) * decoder->private_->frame.header.blocksize);
2093 *got_a_frame = true;
2095 /* we wait to update fixed_block_size until here, when we're sure we've got a proper frame and hence a correct blocksize */
2096 if(decoder->private_->next_fixed_block_size)
2097 decoder->private_->fixed_block_size = decoder->private_->next_fixed_block_size;
2099 /* put the latest values into the public section of the decoder instance */
2100 decoder->protected_->channels = decoder->private_->frame.header.channels;
2101 decoder->protected_->channel_assignment = decoder->private_->frame.header.channel_assignment;
2102 decoder->protected_->bits_per_sample = decoder->private_->frame.header.bits_per_sample;
2103 decoder->protected_->sample_rate = decoder->private_->frame.header.sample_rate;
2104 decoder->protected_->blocksize = decoder->private_->frame.header.blocksize;
2106 FLAC__ASSERT(decoder->private_->frame.header.number_type == FLAC__FRAME_NUMBER_TYPE_SAMPLE_NUMBER);
2107 decoder->private_->samples_decoded = decoder->private_->frame.header.number.sample_number + decoder->private_->frame.header.blocksize;
2110 if(do_full_decode) {
2111 if(write_audio_frame_to_client_(decoder, &decoder->private_->frame, (const FLAC__int32 * const *)decoder->private_->output) != FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE)
2115 decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
2119 FLAC__bool read_frame_header_(FLAC__StreamDecoder *decoder)
2123 unsigned i, blocksize_hint = 0, sample_rate_hint = 0;
2124 FLAC__byte crc8, raw_header[16]; /* MAGIC NUMBER based on the maximum frame header size, including CRC */
2125 unsigned raw_header_len;
2126 FLAC__bool is_unparseable = false;
2128 FLAC__ASSERT(FLAC__bitreader_is_consumed_byte_aligned(decoder->private_->input));
2130 /* init the raw header with the saved bits from synchronization */
2131 raw_header[0] = decoder->private_->header_warmup[0];
2132 raw_header[1] = decoder->private_->header_warmup[1];
2135 /* check to make sure that reserved bit is 0 */
2136 if(raw_header[1] & 0x02) /* MAGIC NUMBER */
2137 is_unparseable = true;
2140 * Note that along the way as we read the header, we look for a sync
2141 * code inside. If we find one it would indicate that our original
2142 * sync was bad since there cannot be a sync code in a valid header.
2144 * Three kinds of things can go wrong when reading the frame header:
2145 * 1) We may have sync'ed incorrectly and not landed on a frame header.
2146 * If we don't find a sync code, it can end up looking like we read
2147 * a valid but unparseable header, until getting to the frame header
2148 * CRC. Even then we could get a false positive on the CRC.
2149 * 2) We may have sync'ed correctly but on an unparseable frame (from a
2151 * 3) We may be on a damaged frame which appears valid but unparseable.
2153 * For all these reasons, we try and read a complete frame header as
2154 * long as it seems valid, even if unparseable, up until the frame
2159 * read in the raw header as bytes so we can CRC it, and parse it on the way
2161 for(i = 0; i < 2; i++) {
2162 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, 8))
2163 return false; /* read_callback_ sets the state for us */
2164 if(x == 0xff) { /* MAGIC NUMBER for the first 8 frame sync bits */
2165 /* if we get here it means our original sync was erroneous since the sync code cannot appear in the header */
2166 decoder->private_->lookahead = (FLAC__byte)x;
2167 decoder->private_->cached = true;
2168 send_error_to_client_(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_BAD_HEADER);
2169 decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
2172 raw_header[raw_header_len++] = (FLAC__byte)x;
2175 switch(x = raw_header[2] >> 4) {
2177 is_unparseable = true;
2180 decoder->private_->frame.header.blocksize = 192;
2186 decoder->private_->frame.header.blocksize = 576 << (x-2);
2200 decoder->private_->frame.header.blocksize = 256 << (x-8);
2207 switch(x = raw_header[2] & 0x0f) {
2209 if(decoder->private_->has_stream_info)
2210 decoder->private_->frame.header.sample_rate = decoder->private_->stream_info.data.stream_info.sample_rate;
2212 is_unparseable = true;
2215 decoder->private_->frame.header.sample_rate = 88200;
2218 decoder->private_->frame.header.sample_rate = 176400;
2221 decoder->private_->frame.header.sample_rate = 192000;
2224 decoder->private_->frame.header.sample_rate = 8000;
2227 decoder->private_->frame.header.sample_rate = 16000;
2230 decoder->private_->frame.header.sample_rate = 22050;
2233 decoder->private_->frame.header.sample_rate = 24000;
2236 decoder->private_->frame.header.sample_rate = 32000;
2239 decoder->private_->frame.header.sample_rate = 44100;
2242 decoder->private_->frame.header.sample_rate = 48000;
2245 decoder->private_->frame.header.sample_rate = 96000;
2250 sample_rate_hint = x;
2253 send_error_to_client_(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_BAD_HEADER);
2254 decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
2260 x = (unsigned)(raw_header[3] >> 4);
2262 decoder->private_->frame.header.channels = 2;
2265 decoder->private_->frame.header.channel_assignment = FLAC__CHANNEL_ASSIGNMENT_LEFT_SIDE;
2268 decoder->private_->frame.header.channel_assignment = FLAC__CHANNEL_ASSIGNMENT_RIGHT_SIDE;
2271 decoder->private_->frame.header.channel_assignment = FLAC__CHANNEL_ASSIGNMENT_MID_SIDE;
2274 is_unparseable = true;
2279 decoder->private_->frame.header.channels = (unsigned)x + 1;
2280 decoder->private_->frame.header.channel_assignment = FLAC__CHANNEL_ASSIGNMENT_INDEPENDENT;
2283 switch(x = (unsigned)(raw_header[3] & 0x0e) >> 1) {
2285 if(decoder->private_->has_stream_info)
2286 decoder->private_->frame.header.bits_per_sample = decoder->private_->stream_info.data.stream_info.bits_per_sample;
2288 is_unparseable = true;
2291 decoder->private_->frame.header.bits_per_sample = 8;
2294 decoder->private_->frame.header.bits_per_sample = 12;
2297 decoder->private_->frame.header.bits_per_sample = 16;
2300 decoder->private_->frame.header.bits_per_sample = 20;
2303 decoder->private_->frame.header.bits_per_sample = 24;
2307 is_unparseable = true;
2314 /* check to make sure that reserved bit is 0 */
2315 if(raw_header[3] & 0x01) /* MAGIC NUMBER */
2316 is_unparseable = true;
2318 /* read the frame's starting sample number (or frame number as the case may be) */
2320 raw_header[1] & 0x01 ||
2321 /*@@@ 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 */
2322 (decoder->private_->has_stream_info && decoder->private_->stream_info.data.stream_info.min_blocksize != decoder->private_->stream_info.data.stream_info.max_blocksize)
2323 ) { /* variable blocksize */
2324 if(!FLAC__bitreader_read_utf8_uint64(decoder->private_->input, &xx, raw_header, &raw_header_len))
2325 return false; /* read_callback_ sets the state for us */
2326 if(xx == FLAC__U64L(0xffffffffffffffff)) { /* i.e. non-UTF8 code... */
2327 decoder->private_->lookahead = raw_header[raw_header_len-1]; /* back up as much as we can */
2328 decoder->private_->cached = true;
2329 send_error_to_client_(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_BAD_HEADER);
2330 decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
2333 decoder->private_->frame.header.number_type = FLAC__FRAME_NUMBER_TYPE_SAMPLE_NUMBER;
2334 decoder->private_->frame.header.number.sample_number = xx;
2336 else { /* fixed blocksize */
2337 if(!FLAC__bitreader_read_utf8_uint32(decoder->private_->input, &x, raw_header, &raw_header_len))
2338 return false; /* read_callback_ sets the state for us */
2339 if(x == 0xffffffff) { /* i.e. non-UTF8 code... */
2340 decoder->private_->lookahead = raw_header[raw_header_len-1]; /* back up as much as we can */
2341 decoder->private_->cached = true;
2342 send_error_to_client_(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_BAD_HEADER);
2343 decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
2346 decoder->private_->frame.header.number_type = FLAC__FRAME_NUMBER_TYPE_FRAME_NUMBER;
2347 decoder->private_->frame.header.number.frame_number = x;
2350 if(blocksize_hint) {
2351 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, 8))
2352 return false; /* read_callback_ sets the state for us */
2353 raw_header[raw_header_len++] = (FLAC__byte)x;
2354 if(blocksize_hint == 7) {
2356 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &_x, 8))
2357 return false; /* read_callback_ sets the state for us */
2358 raw_header[raw_header_len++] = (FLAC__byte)_x;
2361 decoder->private_->frame.header.blocksize = x+1;
2364 if(sample_rate_hint) {
2365 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, 8))
2366 return false; /* read_callback_ sets the state for us */
2367 raw_header[raw_header_len++] = (FLAC__byte)x;
2368 if(sample_rate_hint != 12) {
2370 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &_x, 8))
2371 return false; /* read_callback_ sets the state for us */
2372 raw_header[raw_header_len++] = (FLAC__byte)_x;
2375 if(sample_rate_hint == 12)
2376 decoder->private_->frame.header.sample_rate = x*1000;
2377 else if(sample_rate_hint == 13)
2378 decoder->private_->frame.header.sample_rate = x;
2380 decoder->private_->frame.header.sample_rate = x*10;
2383 /* read the CRC-8 byte */
2384 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, 8))
2385 return false; /* read_callback_ sets the state for us */
2386 crc8 = (FLAC__byte)x;
2388 if(FLAC__crc8(raw_header, raw_header_len) != crc8) {
2389 send_error_to_client_(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_BAD_HEADER);
2390 decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
2394 /* calculate the sample number from the frame number if needed */
2395 decoder->private_->next_fixed_block_size = 0;
2396 if(decoder->private_->frame.header.number_type == FLAC__FRAME_NUMBER_TYPE_FRAME_NUMBER) {
2397 x = decoder->private_->frame.header.number.frame_number;
2398 decoder->private_->frame.header.number_type = FLAC__FRAME_NUMBER_TYPE_SAMPLE_NUMBER;
2399 if(decoder->private_->fixed_block_size)
2400 decoder->private_->frame.header.number.sample_number = (FLAC__uint64)decoder->private_->fixed_block_size * (FLAC__uint64)x;
2401 else if(decoder->private_->has_stream_info) {
2402 if(decoder->private_->stream_info.data.stream_info.min_blocksize == decoder->private_->stream_info.data.stream_info.max_blocksize) {
2403 decoder->private_->frame.header.number.sample_number = (FLAC__uint64)decoder->private_->stream_info.data.stream_info.min_blocksize * (FLAC__uint64)x;
2404 decoder->private_->next_fixed_block_size = decoder->private_->stream_info.data.stream_info.max_blocksize;
2407 is_unparseable = true;
2410 decoder->private_->frame.header.number.sample_number = 0;
2411 decoder->private_->next_fixed_block_size = decoder->private_->frame.header.blocksize;
2414 /* can only get here if the stream has invalid frame numbering and no STREAMINFO, so assume it's not the last (possibly short) frame */
2415 decoder->private_->frame.header.number.sample_number = (FLAC__uint64)decoder->private_->frame.header.blocksize * (FLAC__uint64)x;
2419 if(is_unparseable) {
2420 send_error_to_client_(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_UNPARSEABLE_STREAM);
2421 decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
2428 FLAC__bool read_subframe_(FLAC__StreamDecoder *decoder, unsigned channel, unsigned bps, FLAC__bool do_full_decode)
2431 FLAC__bool wasted_bits;
2434 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &x, 8)) /* MAGIC NUMBER */
2435 return false; /* read_callback_ sets the state for us */
2437 wasted_bits = (x & 1);
2442 if(!FLAC__bitreader_read_unary_unsigned(decoder->private_->input, &u))
2443 return false; /* read_callback_ sets the state for us */
2444 decoder->private_->frame.subframes[channel].wasted_bits = u+1;
2445 bps -= decoder->private_->frame.subframes[channel].wasted_bits;
2448 decoder->private_->frame.subframes[channel].wasted_bits = 0;
2451 * Lots of magic numbers here
2454 send_error_to_client_(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC);
2455 decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
2459 if(!read_subframe_constant_(decoder, channel, bps, do_full_decode))
2463 if(!read_subframe_verbatim_(decoder, channel, bps, do_full_decode))
2467 send_error_to_client_(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_UNPARSEABLE_STREAM);
2468 decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
2472 if(!read_subframe_fixed_(decoder, channel, bps, (x>>1)&7, do_full_decode))
2474 if(decoder->protected_->state == FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC) /* means bad sync or got corruption */
2478 send_error_to_client_(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_UNPARSEABLE_STREAM);
2479 decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
2483 if(!read_subframe_lpc_(decoder, channel, bps, ((x>>1)&31)+1, do_full_decode))
2485 if(decoder->protected_->state == FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC) /* means bad sync or got corruption */
2489 if(wasted_bits && do_full_decode) {
2490 x = decoder->private_->frame.subframes[channel].wasted_bits;
2491 for(i = 0; i < decoder->private_->frame.header.blocksize; i++)
2492 decoder->private_->output[channel][i] <<= x;
2498 FLAC__bool read_subframe_constant_(FLAC__StreamDecoder *decoder, unsigned channel, unsigned bps, FLAC__bool do_full_decode)
2500 FLAC__Subframe_Constant *subframe = &decoder->private_->frame.subframes[channel].data.constant;
2503 FLAC__int32 *output = decoder->private_->output[channel];
2505 decoder->private_->frame.subframes[channel].type = FLAC__SUBFRAME_TYPE_CONSTANT;
2507 if(!FLAC__bitreader_read_raw_int32(decoder->private_->input, &x, bps))
2508 return false; /* read_callback_ sets the state for us */
2510 subframe->value = x;
2512 /* decode the subframe */
2513 if(do_full_decode) {
2514 for(i = 0; i < decoder->private_->frame.header.blocksize; i++)
2521 FLAC__bool read_subframe_fixed_(FLAC__StreamDecoder *decoder, unsigned channel, unsigned bps, const unsigned order, FLAC__bool do_full_decode)
2523 FLAC__Subframe_Fixed *subframe = &decoder->private_->frame.subframes[channel].data.fixed;
2528 decoder->private_->frame.subframes[channel].type = FLAC__SUBFRAME_TYPE_FIXED;
2530 subframe->residual = decoder->private_->residual[channel];
2531 subframe->order = order;
2533 /* read warm-up samples */
2534 for(u = 0; u < order; u++) {
2535 if(!FLAC__bitreader_read_raw_int32(decoder->private_->input, &i32, bps))
2536 return false; /* read_callback_ sets the state for us */
2537 subframe->warmup[u] = i32;
2540 /* read entropy coding method info */
2541 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &u32, FLAC__ENTROPY_CODING_METHOD_TYPE_LEN))
2542 return false; /* read_callback_ sets the state for us */
2543 subframe->entropy_coding_method.type = (FLAC__EntropyCodingMethodType)u32;
2544 switch(subframe->entropy_coding_method.type) {
2545 case FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE:
2546 case FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE2:
2547 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &u32, FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ORDER_LEN))
2548 return false; /* read_callback_ sets the state for us */
2549 subframe->entropy_coding_method.data.partitioned_rice.order = u32;
2550 subframe->entropy_coding_method.data.partitioned_rice.contents = &decoder->private_->partitioned_rice_contents[channel];
2553 send_error_to_client_(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_UNPARSEABLE_STREAM);
2554 decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
2559 switch(subframe->entropy_coding_method.type) {
2560 case FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE:
2561 case FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE2:
2562 if(!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))
2569 /* decode the subframe */
2570 if(do_full_decode) {
2571 memcpy(decoder->private_->output[channel], subframe->warmup, sizeof(FLAC__int32) * order);
2572 FLAC__fixed_restore_signal(decoder->private_->residual[channel], decoder->private_->frame.header.blocksize-order, order, decoder->private_->output[channel]+order);
2578 FLAC__bool read_subframe_lpc_(FLAC__StreamDecoder *decoder, unsigned channel, unsigned bps, const unsigned order, FLAC__bool do_full_decode)
2580 FLAC__Subframe_LPC *subframe = &decoder->private_->frame.subframes[channel].data.lpc;
2585 decoder->private_->frame.subframes[channel].type = FLAC__SUBFRAME_TYPE_LPC;
2587 subframe->residual = decoder->private_->residual[channel];
2588 subframe->order = order;
2590 /* read warm-up samples */
2591 for(u = 0; u < order; u++) {
2592 if(!FLAC__bitreader_read_raw_int32(decoder->private_->input, &i32, bps))
2593 return false; /* read_callback_ sets the state for us */
2594 subframe->warmup[u] = i32;
2597 /* read qlp coeff precision */
2598 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &u32, FLAC__SUBFRAME_LPC_QLP_COEFF_PRECISION_LEN))
2599 return false; /* read_callback_ sets the state for us */
2600 if(u32 == (1u << FLAC__SUBFRAME_LPC_QLP_COEFF_PRECISION_LEN) - 1) {
2601 send_error_to_client_(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC);
2602 decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
2605 subframe->qlp_coeff_precision = u32+1;
2607 /* read qlp shift */
2608 if(!FLAC__bitreader_read_raw_int32(decoder->private_->input, &i32, FLAC__SUBFRAME_LPC_QLP_SHIFT_LEN))
2609 return false; /* read_callback_ sets the state for us */
2610 subframe->quantization_level = i32;
2612 /* read quantized lp coefficiencts */
2613 for(u = 0; u < order; u++) {
2614 if(!FLAC__bitreader_read_raw_int32(decoder->private_->input, &i32, subframe->qlp_coeff_precision))
2615 return false; /* read_callback_ sets the state for us */
2616 subframe->qlp_coeff[u] = i32;
2619 /* read entropy coding method info */
2620 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &u32, FLAC__ENTROPY_CODING_METHOD_TYPE_LEN))
2621 return false; /* read_callback_ sets the state for us */
2622 subframe->entropy_coding_method.type = (FLAC__EntropyCodingMethodType)u32;
2623 switch(subframe->entropy_coding_method.type) {
2624 case FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE:
2625 case FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE2:
2626 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &u32, FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ORDER_LEN))
2627 return false; /* read_callback_ sets the state for us */
2628 subframe->entropy_coding_method.data.partitioned_rice.order = u32;
2629 subframe->entropy_coding_method.data.partitioned_rice.contents = &decoder->private_->partitioned_rice_contents[channel];
2632 send_error_to_client_(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_UNPARSEABLE_STREAM);
2633 decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
2638 switch(subframe->entropy_coding_method.type) {
2639 case FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE:
2640 case FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE2:
2641 if(!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))
2648 /* decode the subframe */
2649 if(do_full_decode) {
2650 memcpy(decoder->private_->output[channel], subframe->warmup, sizeof(FLAC__int32) * order);
2651 /*@@@@@@ technically not pessimistic enough, should be more like
2652 if( (FLAC__uint64)order * ((((FLAC__uint64)1)<<bps)-1) * ((1<<subframe->qlp_coeff_precision)-1) < (((FLAC__uint64)-1) << 32) )
2654 if(bps + subframe->qlp_coeff_precision + FLAC__bitmath_ilog2(order) <= 32)
2655 if(bps <= 16 && subframe->qlp_coeff_precision <= 16) {
2657 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);
2659 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);
2662 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);
2664 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);
2670 FLAC__bool read_subframe_verbatim_(FLAC__StreamDecoder *decoder, unsigned channel, unsigned bps, FLAC__bool do_full_decode)
2672 FLAC__Subframe_Verbatim *subframe = &decoder->private_->frame.subframes[channel].data.verbatim;
2673 FLAC__int32 x, *residual = decoder->private_->residual[channel];
2676 decoder->private_->frame.subframes[channel].type = FLAC__SUBFRAME_TYPE_VERBATIM;
2678 subframe->data = residual;
2680 for(i = 0; i < decoder->private_->frame.header.blocksize; i++) {
2681 if(!FLAC__bitreader_read_raw_int32(decoder->private_->input, &x, bps))
2682 return false; /* read_callback_ sets the state for us */
2686 /* decode the subframe */
2688 memcpy(decoder->private_->output[channel], subframe->data, sizeof(FLAC__int32) * decoder->private_->frame.header.blocksize);
2693 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)
2695 FLAC__uint32 rice_parameter;
2697 unsigned partition, sample, u;
2698 const unsigned partitions = 1u << partition_order;
2699 const unsigned partition_samples = partition_order > 0? decoder->private_->frame.header.blocksize >> partition_order : decoder->private_->frame.header.blocksize - predictor_order;
2700 const unsigned plen = is_extended? FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE2_PARAMETER_LEN : FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_PARAMETER_LEN;
2701 const unsigned pesc = is_extended? FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE2_ESCAPE_PARAMETER : FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER;
2704 if(partition_order == 0) {
2705 if(decoder->private_->frame.header.blocksize < predictor_order) {
2706 send_error_to_client_(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC);
2707 decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
2712 if(partition_samples < predictor_order) {
2713 send_error_to_client_(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC);
2714 decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
2719 if(!FLAC__format_entropy_coding_method_partitioned_rice_contents_ensure_size(partitioned_rice_contents, flac_max(6u, partition_order))) {
2720 decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR;
2725 for(partition = 0; partition < partitions; partition++) {
2726 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &rice_parameter, plen))
2727 return false; /* read_callback_ sets the state for us */
2728 partitioned_rice_contents->parameters[partition] = rice_parameter;
2729 if(rice_parameter < pesc) {
2730 partitioned_rice_contents->raw_bits[partition] = 0;
2731 u = (partition_order == 0 || partition > 0)? partition_samples : partition_samples - predictor_order;
2732 if(!decoder->private_->local_bitreader_read_rice_signed_block(decoder->private_->input, residual + sample, u, rice_parameter))
2733 return false; /* read_callback_ sets the state for us */
2737 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &rice_parameter, FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_RAW_LEN))
2738 return false; /* read_callback_ sets the state for us */
2739 partitioned_rice_contents->raw_bits[partition] = rice_parameter;
2740 for(u = (partition_order == 0 || partition > 0)? 0 : predictor_order; u < partition_samples; u++, sample++) {
2741 if(!FLAC__bitreader_read_raw_int32(decoder->private_->input, &i, rice_parameter))
2742 return false; /* read_callback_ sets the state for us */
2743 residual[sample] = i;
2751 FLAC__bool read_zero_padding_(FLAC__StreamDecoder *decoder)
2753 if(!FLAC__bitreader_is_consumed_byte_aligned(decoder->private_->input)) {
2754 FLAC__uint32 zero = 0;
2755 if(!FLAC__bitreader_read_raw_uint32(decoder->private_->input, &zero, FLAC__bitreader_bits_left_for_byte_alignment(decoder->private_->input)))
2756 return false; /* read_callback_ sets the state for us */
2758 send_error_to_client_(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC);
2759 decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC;
2765 FLAC__bool read_callback_(FLAC__byte buffer[], size_t *bytes, void *client_data)
2767 FLAC__StreamDecoder *decoder = (FLAC__StreamDecoder *)client_data;
2771 /* see [1] HACK NOTE below for why we don't call the eof_callback when decoding Ogg FLAC */
2772 !decoder->private_->is_ogg &&
2774 decoder->private_->eof_callback && decoder->private_->eof_callback(decoder, decoder->private_->client_data)
2777 decoder->protected_->state = FLAC__STREAM_DECODER_END_OF_STREAM;
2780 else if(*bytes > 0) {
2781 /* While seeking, it is possible for our seek to land in the
2782 * middle of audio data that looks exactly like a frame header
2783 * from a future version of an encoder. When that happens, our
2784 * error callback will get an
2785 * FLAC__STREAM_DECODER_UNPARSEABLE_STREAM and increment its
2786 * unparseable_frame_count. But there is a remote possibility
2787 * that it is properly synced at such a "future-codec frame",
2788 * so to make sure, we wait to see many "unparseable" errors in
2789 * a row before bailing out.
2791 if(decoder->private_->is_seeking && decoder->private_->unparseable_frame_count > 20) {
2792 decoder->protected_->state = FLAC__STREAM_DECODER_ABORTED;
2796 const FLAC__StreamDecoderReadStatus status =
2798 decoder->private_->is_ogg?
2799 read_callback_ogg_aspect_(decoder, buffer, bytes) :
2801 decoder->private_->read_callback(decoder, buffer, bytes, decoder->private_->client_data)
2803 if(status == FLAC__STREAM_DECODER_READ_STATUS_ABORT) {
2804 decoder->protected_->state = FLAC__STREAM_DECODER_ABORTED;
2807 else if(*bytes == 0) {
2809 status == FLAC__STREAM_DECODER_READ_STATUS_END_OF_STREAM ||
2812 /* see [1] HACK NOTE below for why we don't call the eof_callback when decoding Ogg FLAC */
2813 !decoder->private_->is_ogg &&
2815 decoder->private_->eof_callback && decoder->private_->eof_callback(decoder, decoder->private_->client_data)
2818 decoder->protected_->state = FLAC__STREAM_DECODER_END_OF_STREAM;
2829 /* abort to avoid a deadlock */
2830 decoder->protected_->state = FLAC__STREAM_DECODER_ABORTED;
2833 /* [1] @@@ HACK NOTE: The end-of-stream checking has to be hacked around
2834 * for Ogg FLAC. This is because the ogg decoder aspect can lose sync
2835 * and at the same time hit the end of the stream (for example, seeking
2836 * to a point that is after the beginning of the last Ogg page). There
2837 * is no way to report an Ogg sync loss through the callbacks (see note
2838 * in read_callback_ogg_aspect_()) so it returns CONTINUE with *bytes==0.
2839 * So to keep the decoder from stopping at this point we gate the call
2840 * to the eof_callback and let the Ogg decoder aspect set the
2841 * end-of-stream state when it is needed.
2846 FLAC__StreamDecoderReadStatus read_callback_ogg_aspect_(const FLAC__StreamDecoder *decoder, FLAC__byte buffer[], size_t *bytes)
2848 switch(FLAC__ogg_decoder_aspect_read_callback_wrapper(&decoder->protected_->ogg_decoder_aspect, buffer, bytes, read_callback_proxy_, decoder, decoder->private_->client_data)) {
2849 case FLAC__OGG_DECODER_ASPECT_READ_STATUS_OK:
2850 return FLAC__STREAM_DECODER_READ_STATUS_CONTINUE;
2851 /* we don't really have a way to handle lost sync via read
2852 * callback so we'll let it pass and let the underlying
2853 * FLAC decoder catch the error
2855 case FLAC__OGG_DECODER_ASPECT_READ_STATUS_LOST_SYNC:
2856 return FLAC__STREAM_DECODER_READ_STATUS_CONTINUE;
2857 case FLAC__OGG_DECODER_ASPECT_READ_STATUS_END_OF_STREAM:
2858 return FLAC__STREAM_DECODER_READ_STATUS_END_OF_STREAM;
2859 case FLAC__OGG_DECODER_ASPECT_READ_STATUS_NOT_FLAC:
2860 case FLAC__OGG_DECODER_ASPECT_READ_STATUS_UNSUPPORTED_MAPPING_VERSION:
2861 case FLAC__OGG_DECODER_ASPECT_READ_STATUS_ABORT:
2862 case FLAC__OGG_DECODER_ASPECT_READ_STATUS_ERROR:
2863 case FLAC__OGG_DECODER_ASPECT_READ_STATUS_MEMORY_ALLOCATION_ERROR:
2864 return FLAC__STREAM_DECODER_READ_STATUS_ABORT;
2867 /* double protection */
2868 return FLAC__STREAM_DECODER_READ_STATUS_ABORT;
2872 FLAC__OggDecoderAspectReadStatus read_callback_proxy_(const void *void_decoder, FLAC__byte buffer[], size_t *bytes, void *client_data)
2874 FLAC__StreamDecoder *decoder = (FLAC__StreamDecoder*)void_decoder;
2876 switch(decoder->private_->read_callback(decoder, buffer, bytes, client_data)) {
2877 case FLAC__STREAM_DECODER_READ_STATUS_CONTINUE:
2878 return FLAC__OGG_DECODER_ASPECT_READ_STATUS_OK;
2879 case FLAC__STREAM_DECODER_READ_STATUS_END_OF_STREAM:
2880 return FLAC__OGG_DECODER_ASPECT_READ_STATUS_END_OF_STREAM;
2881 case FLAC__STREAM_DECODER_READ_STATUS_ABORT:
2882 return FLAC__OGG_DECODER_ASPECT_READ_STATUS_ABORT;
2884 /* double protection: */
2886 return FLAC__OGG_DECODER_ASPECT_READ_STATUS_ABORT;
2891 FLAC__StreamDecoderWriteStatus write_audio_frame_to_client_(FLAC__StreamDecoder *decoder, const FLAC__Frame *frame, const FLAC__int32 * const buffer[])
2893 if(decoder->private_->is_seeking) {
2894 FLAC__uint64 this_frame_sample = frame->header.number.sample_number;
2895 FLAC__uint64 next_frame_sample = this_frame_sample + (FLAC__uint64)frame->header.blocksize;
2896 FLAC__uint64 target_sample = decoder->private_->target_sample;
2898 FLAC__ASSERT(frame->header.number_type == FLAC__FRAME_NUMBER_TYPE_SAMPLE_NUMBER);
2901 decoder->private_->got_a_frame = true;
2903 decoder->private_->last_frame = *frame; /* save the frame */
2904 if(this_frame_sample <= target_sample && target_sample < next_frame_sample) { /* we hit our target frame */
2905 unsigned delta = (unsigned)(target_sample - this_frame_sample);
2906 /* kick out of seek mode */
2907 decoder->private_->is_seeking = false;
2908 /* shift out the samples before target_sample */
2911 const FLAC__int32 *newbuffer[FLAC__MAX_CHANNELS];
2912 for(channel = 0; channel < frame->header.channels; channel++)
2913 newbuffer[channel] = buffer[channel] + delta;
2914 decoder->private_->last_frame.header.blocksize -= delta;
2915 decoder->private_->last_frame.header.number.sample_number += (FLAC__uint64)delta;
2916 /* write the relevant samples */
2917 return decoder->private_->write_callback(decoder, &decoder->private_->last_frame, newbuffer, decoder->private_->client_data);
2920 /* write the relevant samples */
2921 return decoder->private_->write_callback(decoder, frame, buffer, decoder->private_->client_data);
2925 return FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE;
2930 * If we never got STREAMINFO, turn off MD5 checking to save
2931 * cycles since we don't have a sum to compare to anyway
2933 if(!decoder->private_->has_stream_info)
2934 decoder->private_->do_md5_checking = false;
2935 if(decoder->private_->do_md5_checking) {
2936 if(!FLAC__MD5Accumulate(&decoder->private_->md5context, buffer, frame->header.channels, frame->header.blocksize, (frame->header.bits_per_sample+7) / 8))
2937 return FLAC__STREAM_DECODER_WRITE_STATUS_ABORT;
2939 return decoder->private_->write_callback(decoder, frame, buffer, decoder->private_->client_data);
2943 void send_error_to_client_(const FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorStatus status)
2945 if(!decoder->private_->is_seeking)
2946 decoder->private_->error_callback(decoder, status, decoder->private_->client_data);
2947 else if(status == FLAC__STREAM_DECODER_ERROR_STATUS_UNPARSEABLE_STREAM)
2948 decoder->private_->unparseable_frame_count++;
2951 FLAC__bool seek_to_absolute_sample_(FLAC__StreamDecoder *decoder, FLAC__uint64 stream_length, FLAC__uint64 target_sample)
2953 FLAC__uint64 first_frame_offset = decoder->private_->first_frame_offset, lower_bound, upper_bound, lower_bound_sample, upper_bound_sample, this_frame_sample;
2954 FLAC__int64 pos = -1;
2956 unsigned approx_bytes_per_frame;
2957 FLAC__bool first_seek = true;
2958 const FLAC__uint64 total_samples = FLAC__stream_decoder_get_total_samples(decoder);
2959 const unsigned min_blocksize = decoder->private_->stream_info.data.stream_info.min_blocksize;
2960 const unsigned max_blocksize = decoder->private_->stream_info.data.stream_info.max_blocksize;
2961 const unsigned max_framesize = decoder->private_->stream_info.data.stream_info.max_framesize;
2962 const unsigned min_framesize = decoder->private_->stream_info.data.stream_info.min_framesize;
2963 /* take these from the current frame in case they've changed mid-stream */
2964 unsigned channels = FLAC__stream_decoder_get_channels(decoder);
2965 unsigned bps = FLAC__stream_decoder_get_bits_per_sample(decoder);
2966 const FLAC__StreamMetadata_SeekTable *seek_table = decoder->private_->has_seek_table? &decoder->private_->seek_table.data.seek_table : 0;
2968 /* use values from stream info if we didn't decode a frame */
2970 channels = decoder->private_->stream_info.data.stream_info.channels;
2972 bps = decoder->private_->stream_info.data.stream_info.bits_per_sample;
2974 /* we are just guessing here */
2975 if(max_framesize > 0)
2976 approx_bytes_per_frame = (max_framesize + min_framesize) / 2 + 1;
2978 * Check if it's a known fixed-blocksize stream. Note that though
2979 * the spec doesn't allow zeroes in the STREAMINFO block, we may
2980 * never get a STREAMINFO block when decoding so the value of
2981 * min_blocksize might be zero.
2983 else if(min_blocksize == max_blocksize && min_blocksize > 0) {
2984 /* note there are no () around 'bps/8' to keep precision up since it's an integer calulation */
2985 approx_bytes_per_frame = min_blocksize * channels * bps/8 + 64;
2988 approx_bytes_per_frame = 4096 * channels * bps/8 + 64;
2991 * First, we set an upper and lower bound on where in the
2992 * stream we will search. For now we assume the worst case
2993 * scenario, which is our best guess at the beginning of
2994 * the first frame and end of the stream.
2996 lower_bound = first_frame_offset;
2997 lower_bound_sample = 0;
2998 upper_bound = stream_length;
2999 upper_bound_sample = total_samples > 0 ? total_samples : target_sample /*estimate it*/;
3002 * Now we refine the bounds if we have a seektable with
3003 * suitable points. Note that according to the spec they
3004 * must be ordered by ascending sample number.
3006 * Note: to protect against invalid seek tables we will ignore points
3007 * that have frame_samples==0 or sample_number>=total_samples
3010 FLAC__uint64 new_lower_bound = lower_bound;
3011 FLAC__uint64 new_upper_bound = upper_bound;
3012 FLAC__uint64 new_lower_bound_sample = lower_bound_sample;
3013 FLAC__uint64 new_upper_bound_sample = upper_bound_sample;
3015 /* find the closest seek point <= target_sample, if it exists */
3016 for(i = (int)seek_table->num_points - 1; i >= 0; i--) {
3018 seek_table->points[i].sample_number != FLAC__STREAM_METADATA_SEEKPOINT_PLACEHOLDER &&
3019 seek_table->points[i].frame_samples > 0 && /* defense against bad seekpoints */
3020 (total_samples <= 0 || seek_table->points[i].sample_number < total_samples) && /* defense against bad seekpoints */
3021 seek_table->points[i].sample_number <= target_sample
3025 if(i >= 0) { /* i.e. we found a suitable seek point... */
3026 new_lower_bound = first_frame_offset + seek_table->points[i].stream_offset;
3027 new_lower_bound_sample = seek_table->points[i].sample_number;
3030 /* find the closest seek point > target_sample, if it exists */
3031 for(i = 0; i < (int)seek_table->num_points; i++) {
3033 seek_table->points[i].sample_number != FLAC__STREAM_METADATA_SEEKPOINT_PLACEHOLDER &&
3034 seek_table->points[i].frame_samples > 0 && /* defense against bad seekpoints */
3035 (total_samples <= 0 || seek_table->points[i].sample_number < total_samples) && /* defense against bad seekpoints */
3036 seek_table->points[i].sample_number > target_sample
3040 if(i < (int)seek_table->num_points) { /* i.e. we found a suitable seek point... */
3041 new_upper_bound = first_frame_offset + seek_table->points[i].stream_offset;
3042 new_upper_bound_sample = seek_table->points[i].sample_number;
3044 /* final protection against unsorted seek tables; keep original values if bogus */
3045 if(new_upper_bound >= new_lower_bound) {
3046 lower_bound = new_lower_bound;
3047 upper_bound = new_upper_bound;
3048 lower_bound_sample = new_lower_bound_sample;
3049 upper_bound_sample = new_upper_bound_sample;
3053 FLAC__ASSERT(upper_bound_sample >= lower_bound_sample);
3054 /* there are 2 insidious ways that the following equality occurs, which
3056 * 1) total_samples is 0 (unknown) and target_sample is 0
3057 * 2) total_samples is 0 (unknown) and target_sample happens to be
3058 * exactly equal to the last seek point in the seek table; this
3059 * means there is no seek point above it, and upper_bound_samples
3060 * remains equal to the estimate (of target_samples) we made above
3061 * in either case it does not hurt to move upper_bound_sample up by 1
3063 if(upper_bound_sample == lower_bound_sample)
3064 upper_bound_sample++;
3066 decoder->private_->target_sample = target_sample;
3068 /* check if the bounds are still ok */
3069 if (lower_bound_sample >= upper_bound_sample || lower_bound > upper_bound) {
3070 decoder->protected_->state = FLAC__STREAM_DECODER_SEEK_ERROR;
3073 #ifndef FLAC__INTEGER_ONLY_LIBRARY
3074 #if defined _MSC_VER || defined __MINGW32__
3075 /* with VC++ you have to spoon feed it the casting */
3076 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;
3078 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;
3081 /* a little less accurate: */
3082 if(upper_bound - lower_bound < 0xffffffff)
3083 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;
3084 else /* @@@ WATCHOUT, ~2TB limit */
3085 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;
3087 if(pos >= (FLAC__int64)upper_bound)
3088 pos = (FLAC__int64)upper_bound - 1;
3089 if(pos < (FLAC__int64)lower_bound)
3090 pos = (FLAC__int64)lower_bound;
3091 if(decoder->private_->seek_callback(decoder, (FLAC__uint64)pos, decoder->private_->client_data) != FLAC__STREAM_DECODER_SEEK_STATUS_OK) {
3092 decoder->protected_->state = FLAC__STREAM_DECODER_SEEK_ERROR;
3095 if(!FLAC__stream_decoder_flush(decoder)) {
3096 /* above call sets the state for us */
3099 /* Now we need to get a frame. First we need to reset our
3100 * unparseable_frame_count; if we get too many unparseable
3101 * frames in a row, the read callback will return
3102 * FLAC__STREAM_DECODER_READ_STATUS_ABORT, causing
3103 * FLAC__stream_decoder_process_single() to return false.
3105 decoder->private_->unparseable_frame_count = 0;
3106 if(!FLAC__stream_decoder_process_single(decoder)) {
3107 decoder->protected_->state = FLAC__STREAM_DECODER_SEEK_ERROR;
3110 /* our write callback will change the state when it gets to the target frame */
3111 /* 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 */
3113 /*@@@@@@ used to be the following; not clear if the check for end of stream is needed anymore */
3114 if(decoder->protected_->state != FLAC__SEEKABLE_STREAM_DECODER_SEEKING && decoder->protected_->state != FLAC__STREAM_DECODER_END_OF_STREAM)
3117 if(!decoder->private_->is_seeking)
3120 FLAC__ASSERT(decoder->private_->last_frame.header.number_type == FLAC__FRAME_NUMBER_TYPE_SAMPLE_NUMBER);
3121 this_frame_sample = decoder->private_->last_frame.header.number.sample_number;
3123 if (0 == decoder->private_->samples_decoded || (this_frame_sample + decoder->private_->last_frame.header.blocksize >= upper_bound_sample && !first_seek)) {
3124 if (pos == (FLAC__int64)lower_bound) {
3125 /* can't move back any more than the first frame, something is fatally wrong */
3126 decoder->protected_->state = FLAC__STREAM_DECODER_SEEK_ERROR;
3129 /* our last move backwards wasn't big enough, try again */
3130 approx_bytes_per_frame = approx_bytes_per_frame? approx_bytes_per_frame * 2 : 16;
3133 /* allow one seek over upper bound, so we can get a correct upper_bound_sample for streams with unknown total_samples */
3136 /* make sure we are not seeking in corrupted stream */
3137 if (this_frame_sample < lower_bound_sample) {
3138 decoder->protected_->state = FLAC__STREAM_DECODER_SEEK_ERROR;
3142 /* we need to narrow the search */
3143 if(target_sample < this_frame_sample) {
3144 upper_bound_sample = this_frame_sample + decoder->private_->last_frame.header.blocksize;
3145 /*@@@@@@ what will decode position be if at end of stream? */
3146 if(!FLAC__stream_decoder_get_decode_position(decoder, &upper_bound)) {
3147 decoder->protected_->state = FLAC__STREAM_DECODER_SEEK_ERROR;
3150 approx_bytes_per_frame = (unsigned)(2 * (upper_bound - pos) / 3 + 16);
3152 else { /* target_sample >= this_frame_sample + this frame's blocksize */
3153 lower_bound_sample = this_frame_sample + decoder->private_->last_frame.header.blocksize;
3154 if(!FLAC__stream_decoder_get_decode_position(decoder, &lower_bound)) {
3155 decoder->protected_->state = FLAC__STREAM_DECODER_SEEK_ERROR;
3158 approx_bytes_per_frame = (unsigned)(2 * (lower_bound - pos) / 3 + 16);
3166 FLAC__bool seek_to_absolute_sample_ogg_(FLAC__StreamDecoder *decoder, FLAC__uint64 stream_length, FLAC__uint64 target_sample)
3168 FLAC__uint64 left_pos = 0, right_pos = stream_length;
3169 FLAC__uint64 left_sample = 0, right_sample = FLAC__stream_decoder_get_total_samples(decoder);
3170 FLAC__uint64 this_frame_sample = (FLAC__uint64)0 - 1;
3171 FLAC__uint64 pos = 0; /* only initialized to avoid compiler warning */
3172 FLAC__bool did_a_seek;
3173 unsigned iteration = 0;
3175 /* In the first iterations, we will calculate the target byte position
3176 * by the distance from the target sample to left_sample and
3177 * right_sample (let's call it "proportional search"). After that, we
3178 * will switch to binary search.
3180 unsigned BINARY_SEARCH_AFTER_ITERATION = 2;
3182 /* We will switch to a linear search once our current sample is less
3183 * than this number of samples ahead of the target sample
3185 static const FLAC__uint64 LINEAR_SEARCH_WITHIN_SAMPLES = FLAC__MAX_BLOCK_SIZE * 2;
3187 /* If the total number of samples is unknown, use a large value, and
3188 * force binary search immediately.
3190 if(right_sample == 0) {
3191 right_sample = (FLAC__uint64)(-1);
3192 BINARY_SEARCH_AFTER_ITERATION = 0;
3195 decoder->private_->target_sample = target_sample;
3196 for( ; ; iteration++) {
3197 if (iteration == 0 || this_frame_sample > target_sample || target_sample - this_frame_sample > LINEAR_SEARCH_WITHIN_SAMPLES) {
3198 if (iteration >= BINARY_SEARCH_AFTER_ITERATION) {
3199 pos = (right_pos + left_pos) / 2;
3202 #ifndef FLAC__INTEGER_ONLY_LIBRARY
3203 #if defined _MSC_VER || defined __MINGW32__
3204 /* with MSVC you have to spoon feed it the casting */
3205 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));
3207 pos = (FLAC__uint64)((FLAC__double)(target_sample - left_sample) / (FLAC__double)(right_sample - left_sample) * (FLAC__double)(right_pos - left_pos));
3210 /* a little less accurate: */
3211 if ((target_sample-left_sample <= 0xffffffff) && (right_pos-left_pos <= 0xffffffff))
3212 pos = (FLAC__int64)(((target_sample-left_sample) * (right_pos-left_pos)) / (right_sample-left_sample));
3213 else /* @@@ WATCHOUT, ~2TB limit */
3214 pos = (FLAC__int64)((((target_sample-left_sample)>>8) * ((right_pos-left_pos)>>8)) / ((right_sample-left_sample)>>16));
3216 /* @@@ TODO: might want to limit pos to some distance
3217 * before EOF, to make sure we land before the last frame,
3218 * thereby getting a this_frame_sample and so having a better
3224 if(decoder->private_->seek_callback((FLAC__StreamDecoder*)decoder, (FLAC__uint64)pos, decoder->private_->client_data) != FLAC__STREAM_DECODER_SEEK_STATUS_OK) {
3225 decoder->protected_->state = FLAC__STREAM_DECODER_SEEK_ERROR;
3228 if(!FLAC__stream_decoder_flush(decoder)) {
3229 /* above call sets the state for us */
3237 decoder->private_->got_a_frame = false;
3238 if(!FLAC__stream_decoder_process_single(decoder)) {
3239 decoder->protected_->state = FLAC__STREAM_DECODER_SEEK_ERROR;
3242 if(!decoder->private_->got_a_frame) {
3244 /* this can happen if we seek to a point after the last frame; we drop
3245 * to binary search right away in this case to avoid any wasted
3246 * iterations of proportional search.
3249 BINARY_SEARCH_AFTER_ITERATION = 0;
3252 /* this can probably only happen if total_samples is unknown and the
3253 * target_sample is past the end of the stream
3255 decoder->protected_->state = FLAC__STREAM_DECODER_SEEK_ERROR;
3259 /* our write callback will change the state when it gets to the target frame */
3260 else if(!decoder->private_->is_seeking) {
3264 this_frame_sample = decoder->private_->last_frame.header.number.sample_number;
3265 FLAC__ASSERT(decoder->private_->last_frame.header.number_type == FLAC__FRAME_NUMBER_TYPE_SAMPLE_NUMBER);
3268 if (this_frame_sample <= target_sample) {
3269 /* The 'equal' case should not happen, since
3270 * FLAC__stream_decoder_process_single()
3271 * should recognize that it has hit the
3272 * target sample and we would exit through
3273 * the 'break' above.
3275 FLAC__ASSERT(this_frame_sample != target_sample);
3277 left_sample = this_frame_sample;
3278 /* sanity check to avoid infinite loop */
3279 if (left_pos == pos) {
3280 decoder->protected_->state = FLAC__STREAM_DECODER_SEEK_ERROR;
3285 else if(this_frame_sample > target_sample) {
3286 right_sample = this_frame_sample;
3287 /* sanity check to avoid infinite loop */
3288 if (right_pos == pos) {
3289 decoder->protected_->state = FLAC__STREAM_DECODER_SEEK_ERROR;
3302 FLAC__StreamDecoderReadStatus file_read_callback_(const FLAC__StreamDecoder *decoder, FLAC__byte buffer[], size_t *bytes, void *client_data)
3307 *bytes = fread(buffer, sizeof(FLAC__byte), *bytes, decoder->private_->file);
3308 if(ferror(decoder->private_->file))
3309 return FLAC__STREAM_DECODER_READ_STATUS_ABORT;
3310 else if(*bytes == 0)
3311 return FLAC__STREAM_DECODER_READ_STATUS_END_OF_STREAM;
3313 return FLAC__STREAM_DECODER_READ_STATUS_CONTINUE;
3316 return FLAC__STREAM_DECODER_READ_STATUS_ABORT; /* abort to avoid a deadlock */
3319 FLAC__StreamDecoderSeekStatus file_seek_callback_(const FLAC__StreamDecoder *decoder, FLAC__uint64 absolute_byte_offset, void *client_data)
3323 if(decoder->private_->file == stdin)
3324 return FLAC__STREAM_DECODER_SEEK_STATUS_UNSUPPORTED;
3325 else if(fseeko(decoder->private_->file, (FLAC__off_t)absolute_byte_offset, SEEK_SET) < 0)
3326 return FLAC__STREAM_DECODER_SEEK_STATUS_ERROR;
3328 return FLAC__STREAM_DECODER_SEEK_STATUS_OK;
3331 FLAC__StreamDecoderTellStatus file_tell_callback_(const FLAC__StreamDecoder *decoder, FLAC__uint64 *absolute_byte_offset, void *client_data)
3336 if(decoder->private_->file == stdin)
3337 return FLAC__STREAM_DECODER_TELL_STATUS_UNSUPPORTED;
3338 else if((pos = ftello(decoder->private_->file)) < 0)
3339 return FLAC__STREAM_DECODER_TELL_STATUS_ERROR;
3341 *absolute_byte_offset = (FLAC__uint64)pos;
3342 return FLAC__STREAM_DECODER_TELL_STATUS_OK;
3346 FLAC__StreamDecoderLengthStatus file_length_callback_(const FLAC__StreamDecoder *decoder, FLAC__uint64 *stream_length, void *client_data)
3348 struct flac_stat_s filestats;
3351 if(decoder->private_->file == stdin)
3352 return FLAC__STREAM_DECODER_LENGTH_STATUS_UNSUPPORTED;
3353 else if(flac_fstat(fileno(decoder->private_->file), &filestats) != 0)
3354 return FLAC__STREAM_DECODER_LENGTH_STATUS_ERROR;
3356 *stream_length = (FLAC__uint64)filestats.st_size;
3357 return FLAC__STREAM_DECODER_LENGTH_STATUS_OK;
3361 FLAC__bool file_eof_callback_(const FLAC__StreamDecoder *decoder, void *client_data)
3365 return feof(decoder->private_->file)? true : false;