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Diffstat (limited to 'apps/codecs/libFLAC/stream_decoder.c')
-rw-r--r-- | apps/codecs/libFLAC/stream_decoder.c | 2157 |
1 files changed, 2157 insertions, 0 deletions
diff --git a/apps/codecs/libFLAC/stream_decoder.c b/apps/codecs/libFLAC/stream_decoder.c new file mode 100644 index 0000000000..845ff90131 --- /dev/null +++ b/apps/codecs/libFLAC/stream_decoder.c | |||
@@ -0,0 +1,2157 @@ | |||
1 | /* libFLAC - Free Lossless Audio Codec library | ||
2 | * Copyright (C) 2000,2001,2002,2003,2004,2005 Josh Coalson | ||
3 | * | ||
4 | * Redistribution and use in source and binary forms, with or without | ||
5 | * modification, are permitted provided that the following conditions | ||
6 | * are met: | ||
7 | * | ||
8 | * - Redistributions of source code must retain the above copyright | ||
9 | * notice, this list of conditions and the following disclaimer. | ||
10 | * | ||
11 | * - Redistributions in binary form must reproduce the above copyright | ||
12 | * notice, this list of conditions and the following disclaimer in the | ||
13 | * documentation and/or other materials provided with the distribution. | ||
14 | * | ||
15 | * - Neither the name of the Xiph.org Foundation nor the names of its | ||
16 | * contributors may be used to endorse or promote products derived from | ||
17 | * this software without specific prior written permission. | ||
18 | * | ||
19 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | ||
20 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | ||
21 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | ||
22 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR | ||
23 | * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, | ||
24 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, | ||
25 | * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR | ||
26 | * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF | ||
27 | * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING | ||
28 | * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | ||
29 | * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | ||
30 | */ | ||
31 | |||
32 | #include <stdio.h> | ||
33 | #include <stdlib.h> /* for malloc() */ | ||
34 | #include <string.h> /* for memset/memcpy() */ | ||
35 | #include "FLAC/assert.h" | ||
36 | #include "protected/stream_decoder.h" | ||
37 | #include "private/bitbuffer.h" | ||
38 | #include "private/bitmath.h" | ||
39 | #include "private/cpu.h" | ||
40 | #include "private/crc.h" | ||
41 | #include "private/fixed.h" | ||
42 | #include "private/format.h" | ||
43 | #include "private/lpc.h" | ||
44 | #include "private/memory.h" | ||
45 | |||
46 | #ifdef HAVE_CONFIG_H | ||
47 | #include <config.h> | ||
48 | #endif | ||
49 | |||
50 | #ifdef max | ||
51 | #undef max | ||
52 | #endif | ||
53 | #define max(a,b) ((a)>(b)?(a):(b)) | ||
54 | |||
55 | /* adjust for compilers that can't understand using LLU suffix for uint64_t literals */ | ||
56 | #ifdef _MSC_VER | ||
57 | #define FLAC__U64L(x) x | ||
58 | #else | ||
59 | #define FLAC__U64L(x) x##LLU | ||
60 | #endif | ||
61 | |||
62 | /*********************************************************************** | ||
63 | * | ||
64 | * Private static data | ||
65 | * | ||
66 | ***********************************************************************/ | ||
67 | |||
68 | static FLAC__byte ID3V2_TAG_[3] = { 'I', 'D', '3' }; | ||
69 | |||
70 | /*********************************************************************** | ||
71 | * | ||
72 | * Private class method prototypes | ||
73 | * | ||
74 | ***********************************************************************/ | ||
75 | |||
76 | static void set_defaults_(FLAC__StreamDecoder *decoder); | ||
77 | static FLAC__bool allocate_output_(FLAC__StreamDecoder *decoder, unsigned size, unsigned channels); | ||
78 | static FLAC__bool has_id_filtered_(FLAC__StreamDecoder *decoder, FLAC__byte *id); | ||
79 | static FLAC__bool find_metadata_(FLAC__StreamDecoder *decoder); | ||
80 | static FLAC__bool read_metadata_(FLAC__StreamDecoder *decoder); | ||
81 | static FLAC__bool read_metadata_streaminfo_(FLAC__StreamDecoder *decoder, FLAC__bool is_last, unsigned length); | ||
82 | static FLAC__bool read_metadata_seektable_(FLAC__StreamDecoder *decoder, FLAC__bool is_last, unsigned length); | ||
83 | static FLAC__bool read_metadata_vorbiscomment_(FLAC__StreamDecoder *decoder, FLAC__StreamMetadata_VorbisComment *obj); | ||
84 | static FLAC__bool read_metadata_cuesheet_(FLAC__StreamDecoder *decoder, FLAC__StreamMetadata_CueSheet *obj); | ||
85 | static FLAC__bool skip_id3v2_tag_(FLAC__StreamDecoder *decoder); | ||
86 | static FLAC__bool frame_sync_(FLAC__StreamDecoder *decoder); | ||
87 | static FLAC__bool read_frame_(FLAC__StreamDecoder *decoder, FLAC__bool *got_a_frame, FLAC__bool do_full_decode); | ||
88 | static FLAC__bool read_frame_header_(FLAC__StreamDecoder *decoder); | ||
89 | static FLAC__bool read_subframe_(FLAC__StreamDecoder *decoder, unsigned channel, unsigned bps, FLAC__bool do_full_decode); | ||
90 | static FLAC__bool read_subframe_constant_(FLAC__StreamDecoder *decoder, unsigned channel, unsigned bps, FLAC__bool do_full_decode); | ||
91 | static FLAC__bool read_subframe_fixed_(FLAC__StreamDecoder *decoder, unsigned channel, unsigned bps, const unsigned order, FLAC__bool do_full_decode); | ||
92 | static FLAC__bool read_subframe_lpc_(FLAC__StreamDecoder *decoder, unsigned channel, unsigned bps, const unsigned order, FLAC__bool do_full_decode); | ||
93 | static FLAC__bool read_subframe_verbatim_(FLAC__StreamDecoder *decoder, unsigned channel, unsigned bps, FLAC__bool do_full_decode); | ||
94 | static FLAC__bool read_residual_partitioned_rice_(FLAC__StreamDecoder *decoder, unsigned predictor_order, unsigned partition_order, FLAC__EntropyCodingMethod_PartitionedRiceContents *partitioned_rice_contents, FLAC__int32 *residual); | ||
95 | static FLAC__bool read_zero_padding_(FLAC__StreamDecoder *decoder); | ||
96 | static FLAC__bool read_callback_(FLAC__byte buffer[], unsigned *bytes, void *client_data); | ||
97 | |||
98 | /*********************************************************************** | ||
99 | * | ||
100 | * Private class data | ||
101 | * | ||
102 | ***********************************************************************/ | ||
103 | |||
104 | typedef struct FLAC__StreamDecoderPrivate { | ||
105 | FLAC__StreamDecoderReadCallback read_callback; | ||
106 | FLAC__StreamDecoderWriteCallback write_callback; | ||
107 | FLAC__StreamDecoderMetadataCallback metadata_callback; | ||
108 | FLAC__StreamDecoderErrorCallback error_callback; | ||
109 | /* generic 32-bit datapath: */ | ||
110 | void (*local_lpc_restore_signal)(const FLAC__int32 residual[], unsigned data_len, const FLAC__int32 qlp_coeff[], unsigned order, int lp_quantization, FLAC__int32 data[]); | ||
111 | /* generic 64-bit datapath: */ | ||
112 | void (*local_lpc_restore_signal_64bit)(const FLAC__int32 residual[], unsigned data_len, const FLAC__int32 qlp_coeff[], unsigned order, int lp_quantization, FLAC__int32 data[]); | ||
113 | /* for use when the signal is <= 16 bits-per-sample, or <= 15 bits-per-sample on a side channel (which requires 1 extra bit): */ | ||
114 | void (*local_lpc_restore_signal_16bit)(const FLAC__int32 residual[], unsigned data_len, const FLAC__int32 qlp_coeff[], unsigned order, int lp_quantization, FLAC__int32 data[]); | ||
115 | /* for use when the signal is <= 16 bits-per-sample, or <= 15 bits-per-sample on a side channel (which requires 1 extra bit), AND order <= 8: */ | ||
116 | void (*local_lpc_restore_signal_16bit_order8)(const FLAC__int32 residual[], unsigned data_len, const FLAC__int32 qlp_coeff[], unsigned order, int lp_quantization, FLAC__int32 data[]); | ||
117 | void *client_data; | ||
118 | FLAC__BitBuffer *input; | ||
119 | FLAC__int32 *output[FLAC__MAX_CHANNELS]; | ||
120 | FLAC__int32 *residual[FLAC__MAX_CHANNELS]; /* WATCHOUT: these are the aligned pointers; the real pointers that should be free()'d are residual_unaligned[] below */ | ||
121 | FLAC__EntropyCodingMethod_PartitionedRiceContents partitioned_rice_contents[FLAC__MAX_CHANNELS]; | ||
122 | unsigned output_capacity, output_channels; | ||
123 | FLAC__uint32 last_frame_number; | ||
124 | FLAC__uint32 last_block_size; | ||
125 | FLAC__uint64 samples_decoded; | ||
126 | FLAC__bool has_stream_info, has_seek_table; | ||
127 | FLAC__StreamMetadata stream_info; | ||
128 | FLAC__StreamMetadata seek_table; | ||
129 | FLAC__bool metadata_filter[128]; /* MAGIC number 128 == total number of metadata block types == 1 << 7 */ | ||
130 | FLAC__byte *metadata_filter_ids; | ||
131 | unsigned metadata_filter_ids_count, metadata_filter_ids_capacity; /* units for both are IDs, not bytes */ | ||
132 | FLAC__Frame frame; | ||
133 | FLAC__bool cached; /* true if there is a byte in lookahead */ | ||
134 | FLAC__CPUInfo cpuinfo; | ||
135 | FLAC__byte header_warmup[2]; /* contains the sync code and reserved bits */ | ||
136 | FLAC__byte lookahead; /* temp storage when we need to look ahead one byte in the stream */ | ||
137 | /* unaligned (original) pointers to allocated data */ | ||
138 | FLAC__int32 *residual_unaligned[FLAC__MAX_CHANNELS]; | ||
139 | } FLAC__StreamDecoderPrivate; | ||
140 | |||
141 | /*********************************************************************** | ||
142 | * | ||
143 | * Public static class data | ||
144 | * | ||
145 | ***********************************************************************/ | ||
146 | |||
147 | FLAC_API const char * const FLAC__StreamDecoderStateString[] = { | ||
148 | "FLAC__STREAM_DECODER_SEARCH_FOR_METADATA", | ||
149 | "FLAC__STREAM_DECODER_READ_METADATA", | ||
150 | "FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC", | ||
151 | "FLAC__STREAM_DECODER_READ_FRAME", | ||
152 | "FLAC__STREAM_DECODER_END_OF_STREAM", | ||
153 | "FLAC__STREAM_DECODER_ABORTED", | ||
154 | "FLAC__STREAM_DECODER_UNPARSEABLE_STREAM", | ||
155 | "FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR", | ||
156 | "FLAC__STREAM_DECODER_ALREADY_INITIALIZED", | ||
157 | "FLAC__STREAM_DECODER_INVALID_CALLBACK", | ||
158 | "FLAC__STREAM_DECODER_UNINITIALIZED" | ||
159 | }; | ||
160 | |||
161 | FLAC_API const char * const FLAC__StreamDecoderReadStatusString[] = { | ||
162 | "FLAC__STREAM_DECODER_READ_STATUS_CONTINUE", | ||
163 | "FLAC__STREAM_DECODER_READ_STATUS_END_OF_STREAM", | ||
164 | "FLAC__STREAM_DECODER_READ_STATUS_ABORT" | ||
165 | }; | ||
166 | |||
167 | FLAC_API const char * const FLAC__StreamDecoderWriteStatusString[] = { | ||
168 | "FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE", | ||
169 | "FLAC__STREAM_DECODER_WRITE_STATUS_ABORT" | ||
170 | }; | ||
171 | |||
172 | FLAC_API const char * const FLAC__StreamDecoderErrorStatusString[] = { | ||
173 | "FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC", | ||
174 | "FLAC__STREAM_DECODER_ERROR_STATUS_BAD_HEADER", | ||
175 | "FLAC__STREAM_DECODER_ERROR_STATUS_FRAME_CRC_MISMATCH" | ||
176 | }; | ||
177 | |||
178 | /*********************************************************************** | ||
179 | * | ||
180 | * Class constructor/destructor | ||
181 | * | ||
182 | ***********************************************************************/ | ||
183 | FLAC_API FLAC__StreamDecoder *FLAC__stream_decoder_new() | ||
184 | { | ||
185 | FLAC__StreamDecoder *decoder; | ||
186 | unsigned i; | ||
187 | |||
188 | FLAC__ASSERT(sizeof(int) >= 4); /* we want to die right away if this is not true */ | ||
189 | |||
190 | decoder = (FLAC__StreamDecoder*)calloc(1, sizeof(FLAC__StreamDecoder)); | ||
191 | if(decoder == 0) { | ||
192 | return 0; | ||
193 | } | ||
194 | |||
195 | decoder->protected_ = (FLAC__StreamDecoderProtected*)calloc(1, sizeof(FLAC__StreamDecoderProtected)); | ||
196 | if(decoder->protected_ == 0) { | ||
197 | free(decoder); | ||
198 | return 0; | ||
199 | } | ||
200 | |||
201 | decoder->private_ = (FLAC__StreamDecoderPrivate*)calloc(1, sizeof(FLAC__StreamDecoderPrivate)); | ||
202 | if(decoder->private_ == 0) { | ||
203 | free(decoder->protected_); | ||
204 | free(decoder); | ||
205 | return 0; | ||
206 | } | ||
207 | |||
208 | decoder->private_->input = FLAC__bitbuffer_new(); | ||
209 | if(decoder->private_->input == 0) { | ||
210 | free(decoder->private_); | ||
211 | free(decoder->protected_); | ||
212 | free(decoder); | ||
213 | return 0; | ||
214 | } | ||
215 | |||
216 | decoder->private_->metadata_filter_ids_capacity = 16; | ||
217 | if(0 == (decoder->private_->metadata_filter_ids = (FLAC__byte*)malloc((FLAC__STREAM_METADATA_APPLICATION_ID_LEN/8) * decoder->private_->metadata_filter_ids_capacity))) { | ||
218 | FLAC__bitbuffer_delete(decoder->private_->input); | ||
219 | free(decoder->private_); | ||
220 | free(decoder->protected_); | ||
221 | free(decoder); | ||
222 | return 0; | ||
223 | } | ||
224 | |||
225 | for(i = 0; i < FLAC__MAX_CHANNELS; i++) { | ||
226 | decoder->private_->output[i] = 0; | ||
227 | decoder->private_->residual_unaligned[i] = decoder->private_->residual[i] = 0; | ||
228 | } | ||
229 | |||
230 | decoder->private_->output_capacity = 0; | ||
231 | decoder->private_->output_channels = 0; | ||
232 | decoder->private_->has_seek_table = false; | ||
233 | |||
234 | for(i = 0; i < FLAC__MAX_CHANNELS; i++) | ||
235 | FLAC__format_entropy_coding_method_partitioned_rice_contents_init(&decoder->private_->partitioned_rice_contents[i]); | ||
236 | |||
237 | set_defaults_(decoder); | ||
238 | |||
239 | decoder->protected_->state = FLAC__STREAM_DECODER_UNINITIALIZED; | ||
240 | |||
241 | return decoder; | ||
242 | } | ||
243 | |||
244 | FLAC_API void FLAC__stream_decoder_delete(FLAC__StreamDecoder *decoder) | ||
245 | { | ||
246 | unsigned i; | ||
247 | |||
248 | FLAC__ASSERT(0 != decoder); | ||
249 | FLAC__ASSERT(0 != decoder->protected_); | ||
250 | FLAC__ASSERT(0 != decoder->private_); | ||
251 | FLAC__ASSERT(0 != decoder->private_->input); | ||
252 | |||
253 | FLAC__stream_decoder_finish(decoder); | ||
254 | |||
255 | if(0 != decoder->private_->metadata_filter_ids) | ||
256 | free(decoder->private_->metadata_filter_ids); | ||
257 | |||
258 | FLAC__bitbuffer_delete(decoder->private_->input); | ||
259 | |||
260 | for(i = 0; i < FLAC__MAX_CHANNELS; i++) | ||
261 | FLAC__format_entropy_coding_method_partitioned_rice_contents_clear(&decoder->private_->partitioned_rice_contents[i]); | ||
262 | |||
263 | free(decoder->private_); | ||
264 | free(decoder->protected_); | ||
265 | free(decoder); | ||
266 | } | ||
267 | |||
268 | /*********************************************************************** | ||
269 | * | ||
270 | * Public class methods | ||
271 | * | ||
272 | ***********************************************************************/ | ||
273 | |||
274 | FLAC_API FLAC__StreamDecoderState FLAC__stream_decoder_init(FLAC__StreamDecoder *decoder) | ||
275 | { | ||
276 | FLAC__ASSERT(0 != decoder); | ||
277 | |||
278 | if(decoder->protected_->state != FLAC__STREAM_DECODER_UNINITIALIZED) | ||
279 | return decoder->protected_->state = FLAC__STREAM_DECODER_ALREADY_INITIALIZED; | ||
280 | |||
281 | if(0 == decoder->private_->read_callback || 0 == decoder->private_->write_callback || 0 == decoder->private_->metadata_callback || 0 == decoder->private_->error_callback) | ||
282 | return decoder->protected_->state = FLAC__STREAM_DECODER_INVALID_CALLBACK; | ||
283 | |||
284 | if(!FLAC__bitbuffer_init(decoder->private_->input)) | ||
285 | return decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR; | ||
286 | |||
287 | decoder->private_->last_frame_number = 0; | ||
288 | decoder->private_->last_block_size = 0; | ||
289 | decoder->private_->samples_decoded = 0; | ||
290 | decoder->private_->has_stream_info = false; | ||
291 | decoder->private_->cached = false; | ||
292 | |||
293 | /* | ||
294 | * get the CPU info and set the function pointers | ||
295 | */ | ||
296 | FLAC__cpu_info(&decoder->private_->cpuinfo); | ||
297 | /* first default to the non-asm routines */ | ||
298 | decoder->private_->local_lpc_restore_signal = FLAC__lpc_restore_signal; | ||
299 | decoder->private_->local_lpc_restore_signal_64bit = FLAC__lpc_restore_signal_wide; | ||
300 | decoder->private_->local_lpc_restore_signal_16bit = FLAC__lpc_restore_signal; | ||
301 | decoder->private_->local_lpc_restore_signal_16bit_order8 = FLAC__lpc_restore_signal; | ||
302 | /* now override with asm where appropriate */ | ||
303 | #ifndef FLAC__NO_ASM | ||
304 | if(decoder->private_->cpuinfo.use_asm) { | ||
305 | #ifdef FLAC__CPU_IA32 | ||
306 | FLAC__ASSERT(decoder->private_->cpuinfo.type == FLAC__CPUINFO_TYPE_IA32); | ||
307 | #ifdef FLAC__HAS_NASM | ||
308 | if(decoder->private_->cpuinfo.data.ia32.mmx) { | ||
309 | decoder->private_->local_lpc_restore_signal = FLAC__lpc_restore_signal_asm_ia32; | ||
310 | decoder->private_->local_lpc_restore_signal_16bit = FLAC__lpc_restore_signal_asm_ia32_mmx; | ||
311 | decoder->private_->local_lpc_restore_signal_16bit_order8 = FLAC__lpc_restore_signal_asm_ia32_mmx; | ||
312 | } | ||
313 | else { | ||
314 | decoder->private_->local_lpc_restore_signal = FLAC__lpc_restore_signal_asm_ia32; | ||
315 | decoder->private_->local_lpc_restore_signal_16bit = FLAC__lpc_restore_signal_asm_ia32; | ||
316 | decoder->private_->local_lpc_restore_signal_16bit_order8 = FLAC__lpc_restore_signal_asm_ia32; | ||
317 | } | ||
318 | #endif | ||
319 | #elif defined FLAC__CPU_PPC | ||
320 | FLAC__ASSERT(decoder->private_->cpuinfo.type == FLAC__CPUINFO_TYPE_PPC); | ||
321 | if(decoder->private_->cpuinfo.data.ppc.altivec) { | ||
322 | decoder->private_->local_lpc_restore_signal_16bit = FLAC__lpc_restore_signal_asm_ppc_altivec_16; | ||
323 | decoder->private_->local_lpc_restore_signal_16bit_order8 = FLAC__lpc_restore_signal_asm_ppc_altivec_16_order8; | ||
324 | } | ||
325 | #endif | ||
326 | } | ||
327 | #endif | ||
328 | |||
329 | if(!FLAC__stream_decoder_reset(decoder)) | ||
330 | return decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR; | ||
331 | |||
332 | return decoder->protected_->state; | ||
333 | } | ||
334 | |||
335 | FLAC_API void FLAC__stream_decoder_finish(FLAC__StreamDecoder *decoder) | ||
336 | { | ||
337 | unsigned i; | ||
338 | FLAC__ASSERT(0 != decoder); | ||
339 | if(decoder->protected_->state == FLAC__STREAM_DECODER_UNINITIALIZED) | ||
340 | return; | ||
341 | if(0 != decoder->private_->seek_table.data.seek_table.points) { | ||
342 | free(decoder->private_->seek_table.data.seek_table.points); | ||
343 | decoder->private_->seek_table.data.seek_table.points = 0; | ||
344 | decoder->private_->has_seek_table = false; | ||
345 | } | ||
346 | FLAC__bitbuffer_free(decoder->private_->input); | ||
347 | for(i = 0; i < FLAC__MAX_CHANNELS; i++) { | ||
348 | /* WATCHOUT: | ||
349 | * FLAC__lpc_restore_signal_asm_ia32_mmx() requires that the | ||
350 | * output arrays have a buffer of up to 3 zeroes in front | ||
351 | * (at negative indices) for alignment purposes; we use 4 | ||
352 | * to keep the data well-aligned. | ||
353 | */ | ||
354 | if(0 != decoder->private_->output[i]) { | ||
355 | free(decoder->private_->output[i]-4); | ||
356 | decoder->private_->output[i] = 0; | ||
357 | } | ||
358 | if(0 != decoder->private_->residual_unaligned[i]) { | ||
359 | free(decoder->private_->residual_unaligned[i]); | ||
360 | decoder->private_->residual_unaligned[i] = decoder->private_->residual[i] = 0; | ||
361 | } | ||
362 | } | ||
363 | decoder->private_->output_capacity = 0; | ||
364 | decoder->private_->output_channels = 0; | ||
365 | |||
366 | set_defaults_(decoder); | ||
367 | |||
368 | decoder->protected_->state = FLAC__STREAM_DECODER_UNINITIALIZED; | ||
369 | } | ||
370 | |||
371 | FLAC_API FLAC__bool FLAC__stream_decoder_set_read_callback(FLAC__StreamDecoder *decoder, FLAC__StreamDecoderReadCallback value) | ||
372 | { | ||
373 | FLAC__ASSERT(0 != decoder); | ||
374 | FLAC__ASSERT(0 != decoder->private_); | ||
375 | FLAC__ASSERT(0 != decoder->protected_); | ||
376 | if(decoder->protected_->state != FLAC__STREAM_DECODER_UNINITIALIZED) | ||
377 | return false; | ||
378 | decoder->private_->read_callback = value; | ||
379 | return true; | ||
380 | } | ||
381 | |||
382 | FLAC_API FLAC__bool FLAC__stream_decoder_set_write_callback(FLAC__StreamDecoder *decoder, FLAC__StreamDecoderWriteCallback value) | ||
383 | { | ||
384 | FLAC__ASSERT(0 != decoder); | ||
385 | FLAC__ASSERT(0 != decoder->private_); | ||
386 | FLAC__ASSERT(0 != decoder->protected_); | ||
387 | if(decoder->protected_->state != FLAC__STREAM_DECODER_UNINITIALIZED) | ||
388 | return false; | ||
389 | decoder->private_->write_callback = value; | ||
390 | return true; | ||
391 | } | ||
392 | |||
393 | FLAC_API FLAC__bool FLAC__stream_decoder_set_metadata_callback(FLAC__StreamDecoder *decoder, FLAC__StreamDecoderMetadataCallback value) | ||
394 | { | ||
395 | FLAC__ASSERT(0 != decoder); | ||
396 | FLAC__ASSERT(0 != decoder->private_); | ||
397 | FLAC__ASSERT(0 != decoder->protected_); | ||
398 | if(decoder->protected_->state != FLAC__STREAM_DECODER_UNINITIALIZED) | ||
399 | return false; | ||
400 | decoder->private_->metadata_callback = value; | ||
401 | return true; | ||
402 | } | ||
403 | |||
404 | FLAC_API FLAC__bool FLAC__stream_decoder_set_error_callback(FLAC__StreamDecoder *decoder, FLAC__StreamDecoderErrorCallback value) | ||
405 | { | ||
406 | FLAC__ASSERT(0 != decoder); | ||
407 | FLAC__ASSERT(0 != decoder->private_); | ||
408 | FLAC__ASSERT(0 != decoder->protected_); | ||
409 | if(decoder->protected_->state != FLAC__STREAM_DECODER_UNINITIALIZED) | ||
410 | return false; | ||
411 | decoder->private_->error_callback = value; | ||
412 | return true; | ||
413 | } | ||
414 | |||
415 | FLAC_API FLAC__bool FLAC__stream_decoder_set_client_data(FLAC__StreamDecoder *decoder, void *value) | ||
416 | { | ||
417 | FLAC__ASSERT(0 != decoder); | ||
418 | FLAC__ASSERT(0 != decoder->private_); | ||
419 | FLAC__ASSERT(0 != decoder->protected_); | ||
420 | if(decoder->protected_->state != FLAC__STREAM_DECODER_UNINITIALIZED) | ||
421 | return false; | ||
422 | decoder->private_->client_data = value; | ||
423 | return true; | ||
424 | } | ||
425 | |||
426 | FLAC_API FLAC__bool FLAC__stream_decoder_set_metadata_respond(FLAC__StreamDecoder *decoder, FLAC__MetadataType type) | ||
427 | { | ||
428 | FLAC__ASSERT(0 != decoder); | ||
429 | FLAC__ASSERT(0 != decoder->private_); | ||
430 | FLAC__ASSERT(0 != decoder->protected_); | ||
431 | FLAC__ASSERT((unsigned)type <= FLAC__MAX_METADATA_TYPE_CODE); | ||
432 | /* double protection */ | ||
433 | if((unsigned)type > FLAC__MAX_METADATA_TYPE_CODE) | ||
434 | return false; | ||
435 | if(decoder->protected_->state != FLAC__STREAM_DECODER_UNINITIALIZED) | ||
436 | return false; | ||
437 | decoder->private_->metadata_filter[type] = true; | ||
438 | if(type == FLAC__METADATA_TYPE_APPLICATION) | ||
439 | decoder->private_->metadata_filter_ids_count = 0; | ||
440 | return true; | ||
441 | } | ||
442 | |||
443 | FLAC_API FLAC__bool FLAC__stream_decoder_set_metadata_respond_application(FLAC__StreamDecoder *decoder, const FLAC__byte id[4]) | ||
444 | { | ||
445 | FLAC__ASSERT(0 != decoder); | ||
446 | FLAC__ASSERT(0 != decoder->private_); | ||
447 | FLAC__ASSERT(0 != decoder->protected_); | ||
448 | FLAC__ASSERT(0 != id); | ||
449 | if(decoder->protected_->state != FLAC__STREAM_DECODER_UNINITIALIZED) | ||
450 | return false; | ||
451 | |||
452 | if(decoder->private_->metadata_filter[FLAC__METADATA_TYPE_APPLICATION]) | ||
453 | return true; | ||
454 | |||
455 | FLAC__ASSERT(0 != decoder->private_->metadata_filter_ids); | ||
456 | |||
457 | if(decoder->private_->metadata_filter_ids_count == decoder->private_->metadata_filter_ids_capacity) { | ||
458 | if(0 == (decoder->private_->metadata_filter_ids = (FLAC__byte*)realloc(decoder->private_->metadata_filter_ids, decoder->private_->metadata_filter_ids_capacity * 2))) | ||
459 | return decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR; | ||
460 | decoder->private_->metadata_filter_ids_capacity *= 2; | ||
461 | } | ||
462 | |||
463 | 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)); | ||
464 | decoder->private_->metadata_filter_ids_count++; | ||
465 | |||
466 | return true; | ||
467 | } | ||
468 | |||
469 | FLAC_API FLAC__bool FLAC__stream_decoder_set_metadata_respond_all(FLAC__StreamDecoder *decoder) | ||
470 | { | ||
471 | unsigned i; | ||
472 | FLAC__ASSERT(0 != decoder); | ||
473 | FLAC__ASSERT(0 != decoder->private_); | ||
474 | FLAC__ASSERT(0 != decoder->protected_); | ||
475 | if(decoder->protected_->state != FLAC__STREAM_DECODER_UNINITIALIZED) | ||
476 | return false; | ||
477 | for(i = 0; i < sizeof(decoder->private_->metadata_filter) / sizeof(decoder->private_->metadata_filter[0]); i++) | ||
478 | decoder->private_->metadata_filter[i] = true; | ||
479 | decoder->private_->metadata_filter_ids_count = 0; | ||
480 | return true; | ||
481 | } | ||
482 | |||
483 | FLAC_API FLAC__bool FLAC__stream_decoder_set_metadata_ignore(FLAC__StreamDecoder *decoder, FLAC__MetadataType type) | ||
484 | { | ||
485 | FLAC__ASSERT(0 != decoder); | ||
486 | FLAC__ASSERT(0 != decoder->private_); | ||
487 | FLAC__ASSERT(0 != decoder->protected_); | ||
488 | FLAC__ASSERT((unsigned)type <= FLAC__MAX_METADATA_TYPE_CODE); | ||
489 | /* double protection */ | ||
490 | if((unsigned)type > FLAC__MAX_METADATA_TYPE_CODE) | ||
491 | return false; | ||
492 | if(decoder->protected_->state != FLAC__STREAM_DECODER_UNINITIALIZED) | ||
493 | return false; | ||
494 | decoder->private_->metadata_filter[type] = false; | ||
495 | if(type == FLAC__METADATA_TYPE_APPLICATION) | ||
496 | decoder->private_->metadata_filter_ids_count = 0; | ||
497 | return true; | ||
498 | } | ||
499 | |||
500 | FLAC_API FLAC__bool FLAC__stream_decoder_set_metadata_ignore_application(FLAC__StreamDecoder *decoder, const FLAC__byte id[4]) | ||
501 | { | ||
502 | FLAC__ASSERT(0 != decoder); | ||
503 | FLAC__ASSERT(0 != decoder->private_); | ||
504 | FLAC__ASSERT(0 != decoder->protected_); | ||
505 | FLAC__ASSERT(0 != id); | ||
506 | if(decoder->protected_->state != FLAC__STREAM_DECODER_UNINITIALIZED) | ||
507 | return false; | ||
508 | |||
509 | if(!decoder->private_->metadata_filter[FLAC__METADATA_TYPE_APPLICATION]) | ||
510 | return true; | ||
511 | |||
512 | FLAC__ASSERT(0 != decoder->private_->metadata_filter_ids); | ||
513 | |||
514 | if(decoder->private_->metadata_filter_ids_count == decoder->private_->metadata_filter_ids_capacity) { | ||
515 | if(0 == (decoder->private_->metadata_filter_ids = (FLAC__byte*)realloc(decoder->private_->metadata_filter_ids, decoder->private_->metadata_filter_ids_capacity * 2))) | ||
516 | return decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR; | ||
517 | decoder->private_->metadata_filter_ids_capacity *= 2; | ||
518 | } | ||
519 | |||
520 | 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)); | ||
521 | decoder->private_->metadata_filter_ids_count++; | ||
522 | |||
523 | return true; | ||
524 | } | ||
525 | |||
526 | FLAC_API FLAC__bool FLAC__stream_decoder_set_metadata_ignore_all(FLAC__StreamDecoder *decoder) | ||
527 | { | ||
528 | FLAC__ASSERT(0 != decoder); | ||
529 | FLAC__ASSERT(0 != decoder->private_); | ||
530 | FLAC__ASSERT(0 != decoder->protected_); | ||
531 | if(decoder->protected_->state != FLAC__STREAM_DECODER_UNINITIALIZED) | ||
532 | return false; | ||
533 | memset(decoder->private_->metadata_filter, 0, sizeof(decoder->private_->metadata_filter)); | ||
534 | decoder->private_->metadata_filter_ids_count = 0; | ||
535 | return true; | ||
536 | } | ||
537 | |||
538 | FLAC_API FLAC__StreamDecoderState FLAC__stream_decoder_get_state(const FLAC__StreamDecoder *decoder) | ||
539 | { | ||
540 | FLAC__ASSERT(0 != decoder); | ||
541 | FLAC__ASSERT(0 != decoder->protected_); | ||
542 | return decoder->protected_->state; | ||
543 | } | ||
544 | |||
545 | FLAC_API const char *FLAC__stream_decoder_get_resolved_state_string(const FLAC__StreamDecoder *decoder) | ||
546 | { | ||
547 | return FLAC__StreamDecoderStateString[decoder->protected_->state]; | ||
548 | } | ||
549 | |||
550 | FLAC_API unsigned FLAC__stream_decoder_get_channels(const FLAC__StreamDecoder *decoder) | ||
551 | { | ||
552 | FLAC__ASSERT(0 != decoder); | ||
553 | FLAC__ASSERT(0 != decoder->protected_); | ||
554 | return decoder->protected_->channels; | ||
555 | } | ||
556 | |||
557 | FLAC_API FLAC__ChannelAssignment FLAC__stream_decoder_get_channel_assignment(const FLAC__StreamDecoder *decoder) | ||
558 | { | ||
559 | FLAC__ASSERT(0 != decoder); | ||
560 | FLAC__ASSERT(0 != decoder->protected_); | ||
561 | return decoder->protected_->channel_assignment; | ||
562 | } | ||
563 | |||
564 | FLAC_API unsigned FLAC__stream_decoder_get_bits_per_sample(const FLAC__StreamDecoder *decoder) | ||
565 | { | ||
566 | FLAC__ASSERT(0 != decoder); | ||
567 | FLAC__ASSERT(0 != decoder->protected_); | ||
568 | return decoder->protected_->bits_per_sample; | ||
569 | } | ||
570 | |||
571 | FLAC_API unsigned FLAC__stream_decoder_get_sample_rate(const FLAC__StreamDecoder *decoder) | ||
572 | { | ||
573 | FLAC__ASSERT(0 != decoder); | ||
574 | FLAC__ASSERT(0 != decoder->protected_); | ||
575 | return decoder->protected_->sample_rate; | ||
576 | } | ||
577 | |||
578 | FLAC_API unsigned FLAC__stream_decoder_get_blocksize(const FLAC__StreamDecoder *decoder) | ||
579 | { | ||
580 | FLAC__ASSERT(0 != decoder); | ||
581 | FLAC__ASSERT(0 != decoder->protected_); | ||
582 | return decoder->protected_->blocksize; | ||
583 | } | ||
584 | |||
585 | FLAC_API FLAC__bool FLAC__stream_decoder_flush(FLAC__StreamDecoder *decoder) | ||
586 | { | ||
587 | FLAC__ASSERT(0 != decoder); | ||
588 | FLAC__ASSERT(0 != decoder->private_); | ||
589 | FLAC__ASSERT(0 != decoder->protected_); | ||
590 | |||
591 | if(!FLAC__bitbuffer_clear(decoder->private_->input)) { | ||
592 | decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR; | ||
593 | return false; | ||
594 | } | ||
595 | decoder->private_->last_frame_number = 0; | ||
596 | decoder->private_->last_block_size = 0; | ||
597 | decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC; | ||
598 | |||
599 | return true; | ||
600 | } | ||
601 | |||
602 | FLAC_API FLAC__bool FLAC__stream_decoder_reset(FLAC__StreamDecoder *decoder) | ||
603 | { | ||
604 | FLAC__ASSERT(0 != decoder); | ||
605 | FLAC__ASSERT(0 != decoder->private_); | ||
606 | FLAC__ASSERT(0 != decoder->protected_); | ||
607 | |||
608 | if(!FLAC__stream_decoder_flush(decoder)) { | ||
609 | decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR; | ||
610 | return false; | ||
611 | } | ||
612 | decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_METADATA; | ||
613 | |||
614 | decoder->private_->samples_decoded = 0; | ||
615 | |||
616 | return true; | ||
617 | } | ||
618 | |||
619 | FLAC_API FLAC__bool FLAC__stream_decoder_process_single(FLAC__StreamDecoder *decoder) | ||
620 | { | ||
621 | FLAC__bool got_a_frame; | ||
622 | FLAC__ASSERT(0 != decoder); | ||
623 | FLAC__ASSERT(0 != decoder->protected_); | ||
624 | |||
625 | while(1) { | ||
626 | switch(decoder->protected_->state) { | ||
627 | case FLAC__STREAM_DECODER_SEARCH_FOR_METADATA: | ||
628 | if(!find_metadata_(decoder)) | ||
629 | return false; /* above function sets the status for us */ | ||
630 | break; | ||
631 | case FLAC__STREAM_DECODER_READ_METADATA: | ||
632 | if(!read_metadata_(decoder)) | ||
633 | return false; /* above function sets the status for us */ | ||
634 | else | ||
635 | return true; | ||
636 | case FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC: | ||
637 | if(!frame_sync_(decoder)) | ||
638 | return true; /* above function sets the status for us */ | ||
639 | break; | ||
640 | case FLAC__STREAM_DECODER_READ_FRAME: | ||
641 | if(!read_frame_(decoder, &got_a_frame, /*do_full_decode=*/true)) | ||
642 | return false; /* above function sets the status for us */ | ||
643 | if(got_a_frame) | ||
644 | return true; /* above function sets the status for us */ | ||
645 | break; | ||
646 | case FLAC__STREAM_DECODER_END_OF_STREAM: | ||
647 | case FLAC__STREAM_DECODER_ABORTED: | ||
648 | return true; | ||
649 | default: | ||
650 | FLAC__ASSERT(0); | ||
651 | return false; | ||
652 | } | ||
653 | } | ||
654 | } | ||
655 | |||
656 | FLAC_API FLAC__bool FLAC__stream_decoder_process_until_end_of_metadata(FLAC__StreamDecoder *decoder) | ||
657 | { | ||
658 | FLAC__ASSERT(0 != decoder); | ||
659 | FLAC__ASSERT(0 != decoder->protected_); | ||
660 | |||
661 | while(1) { | ||
662 | switch(decoder->protected_->state) { | ||
663 | case FLAC__STREAM_DECODER_SEARCH_FOR_METADATA: | ||
664 | if(!find_metadata_(decoder)) | ||
665 | return false; /* above function sets the status for us */ | ||
666 | break; | ||
667 | case FLAC__STREAM_DECODER_READ_METADATA: | ||
668 | if(!read_metadata_(decoder)) | ||
669 | return false; /* above function sets the status for us */ | ||
670 | break; | ||
671 | case FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC: | ||
672 | case FLAC__STREAM_DECODER_READ_FRAME: | ||
673 | case FLAC__STREAM_DECODER_END_OF_STREAM: | ||
674 | case FLAC__STREAM_DECODER_ABORTED: | ||
675 | return true; | ||
676 | default: | ||
677 | FLAC__ASSERT(0); | ||
678 | return false; | ||
679 | } | ||
680 | } | ||
681 | } | ||
682 | |||
683 | FLAC_API FLAC__bool FLAC__stream_decoder_process_until_end_of_stream(FLAC__StreamDecoder *decoder) | ||
684 | { | ||
685 | FLAC__bool dummy; | ||
686 | FLAC__ASSERT(0 != decoder); | ||
687 | FLAC__ASSERT(0 != decoder->protected_); | ||
688 | |||
689 | while(1) { | ||
690 | switch(decoder->protected_->state) { | ||
691 | case FLAC__STREAM_DECODER_SEARCH_FOR_METADATA: | ||
692 | if(!find_metadata_(decoder)) | ||
693 | return false; /* above function sets the status for us */ | ||
694 | break; | ||
695 | case FLAC__STREAM_DECODER_READ_METADATA: | ||
696 | if(!read_metadata_(decoder)) | ||
697 | return false; /* above function sets the status for us */ | ||
698 | break; | ||
699 | case FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC: | ||
700 | if(!frame_sync_(decoder)) | ||
701 | return true; /* above function sets the status for us */ | ||
702 | break; | ||
703 | case FLAC__STREAM_DECODER_READ_FRAME: | ||
704 | if(!read_frame_(decoder, &dummy, /*do_full_decode=*/true)) | ||
705 | return false; /* above function sets the status for us */ | ||
706 | break; | ||
707 | case FLAC__STREAM_DECODER_END_OF_STREAM: | ||
708 | case FLAC__STREAM_DECODER_ABORTED: | ||
709 | return true; | ||
710 | default: | ||
711 | FLAC__ASSERT(0); | ||
712 | return false; | ||
713 | } | ||
714 | } | ||
715 | } | ||
716 | |||
717 | FLAC_API FLAC__bool FLAC__stream_decoder_skip_single_frame(FLAC__StreamDecoder *decoder) | ||
718 | { | ||
719 | FLAC__bool got_a_frame; | ||
720 | FLAC__ASSERT(0 != decoder); | ||
721 | FLAC__ASSERT(0 != decoder->protected_); | ||
722 | |||
723 | while(1) { | ||
724 | switch(decoder->protected_->state) { | ||
725 | case FLAC__STREAM_DECODER_SEARCH_FOR_METADATA: | ||
726 | case FLAC__STREAM_DECODER_READ_METADATA: | ||
727 | return false; /* above function sets the status for us */ | ||
728 | case FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC: | ||
729 | if(!frame_sync_(decoder)) | ||
730 | return true; /* above function sets the status for us */ | ||
731 | break; | ||
732 | case FLAC__STREAM_DECODER_READ_FRAME: | ||
733 | if(!read_frame_(decoder, &got_a_frame, /*do_full_decode=*/false)) | ||
734 | return false; /* above function sets the status for us */ | ||
735 | if(got_a_frame) | ||
736 | return true; /* above function sets the status for us */ | ||
737 | break; | ||
738 | case FLAC__STREAM_DECODER_END_OF_STREAM: | ||
739 | case FLAC__STREAM_DECODER_ABORTED: | ||
740 | return true; | ||
741 | default: | ||
742 | FLAC__ASSERT(0); | ||
743 | return false; | ||
744 | } | ||
745 | } | ||
746 | } | ||
747 | |||
748 | /*********************************************************************** | ||
749 | * | ||
750 | * Protected class methods | ||
751 | * | ||
752 | ***********************************************************************/ | ||
753 | |||
754 | unsigned FLAC__stream_decoder_get_input_bytes_unconsumed(const FLAC__StreamDecoder *decoder) | ||
755 | { | ||
756 | FLAC__ASSERT(0 != decoder); | ||
757 | return FLAC__bitbuffer_get_input_bytes_unconsumed(decoder->private_->input); | ||
758 | } | ||
759 | |||
760 | /*********************************************************************** | ||
761 | * | ||
762 | * Private class methods | ||
763 | * | ||
764 | ***********************************************************************/ | ||
765 | |||
766 | void set_defaults_(FLAC__StreamDecoder *decoder) | ||
767 | { | ||
768 | decoder->private_->read_callback = 0; | ||
769 | decoder->private_->write_callback = 0; | ||
770 | decoder->private_->metadata_callback = 0; | ||
771 | decoder->private_->error_callback = 0; | ||
772 | decoder->private_->client_data = 0; | ||
773 | |||
774 | memset(decoder->private_->metadata_filter, 0, sizeof(decoder->private_->metadata_filter)); | ||
775 | decoder->private_->metadata_filter[FLAC__METADATA_TYPE_STREAMINFO] = true; | ||
776 | decoder->private_->metadata_filter_ids_count = 0; | ||
777 | } | ||
778 | |||
779 | FLAC__bool allocate_output_(FLAC__StreamDecoder *decoder, unsigned size, unsigned channels) | ||
780 | { | ||
781 | unsigned i; | ||
782 | FLAC__int32 *tmp; | ||
783 | |||
784 | if(size <= decoder->private_->output_capacity && channels <= decoder->private_->output_channels) | ||
785 | return true; | ||
786 | |||
787 | /* simply using realloc() is not practical because the number of channels may change mid-stream */ | ||
788 | |||
789 | for(i = 0; i < FLAC__MAX_CHANNELS; i++) { | ||
790 | if(0 != decoder->private_->output[i]) { | ||
791 | free(decoder->private_->output[i]-4); | ||
792 | decoder->private_->output[i] = 0; | ||
793 | } | ||
794 | if(0 != decoder->private_->residual_unaligned[i]) { | ||
795 | free(decoder->private_->residual_unaligned[i]); | ||
796 | decoder->private_->residual_unaligned[i] = decoder->private_->residual[i] = 0; | ||
797 | } | ||
798 | } | ||
799 | |||
800 | for(i = 0; i < channels; i++) { | ||
801 | /* WATCHOUT: | ||
802 | * FLAC__lpc_restore_signal_asm_ia32_mmx() requires that the | ||
803 | * output arrays have a buffer of up to 3 zeroes in front | ||
804 | * (at negative indices) for alignment purposes; we use 4 | ||
805 | * to keep the data well-aligned. | ||
806 | */ | ||
807 | tmp = (FLAC__int32*)malloc(sizeof(FLAC__int32)*(size+4)); | ||
808 | if(tmp == 0) { | ||
809 | decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR; | ||
810 | return false; | ||
811 | } | ||
812 | memset(tmp, 0, sizeof(FLAC__int32)*4); | ||
813 | decoder->private_->output[i] = tmp + 4; | ||
814 | |||
815 | /* WATCHOUT: | ||
816 | * minimum of quadword alignment for PPC vector optimizations is REQUIRED: | ||
817 | */ | ||
818 | if(!FLAC__memory_alloc_aligned_int32_array(size, &decoder->private_->residual_unaligned[i], &decoder->private_->residual[i])) { | ||
819 | decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR; | ||
820 | return false; | ||
821 | } | ||
822 | } | ||
823 | |||
824 | decoder->private_->output_capacity = size; | ||
825 | decoder->private_->output_channels = channels; | ||
826 | |||
827 | return true; | ||
828 | } | ||
829 | |||
830 | FLAC__bool has_id_filtered_(FLAC__StreamDecoder *decoder, FLAC__byte *id) | ||
831 | { | ||
832 | unsigned i; | ||
833 | |||
834 | FLAC__ASSERT(0 != decoder); | ||
835 | FLAC__ASSERT(0 != decoder->private_); | ||
836 | |||
837 | for(i = 0; i < decoder->private_->metadata_filter_ids_count; i++) | ||
838 | if(0 == memcmp(decoder->private_->metadata_filter_ids + i * (FLAC__STREAM_METADATA_APPLICATION_ID_LEN/8), id, (FLAC__STREAM_METADATA_APPLICATION_ID_LEN/8))) | ||
839 | return true; | ||
840 | |||
841 | return false; | ||
842 | } | ||
843 | |||
844 | FLAC__bool find_metadata_(FLAC__StreamDecoder *decoder) | ||
845 | { | ||
846 | FLAC__uint32 x; | ||
847 | unsigned i, id; | ||
848 | FLAC__bool first = true; | ||
849 | |||
850 | FLAC__ASSERT(FLAC__bitbuffer_is_consumed_byte_aligned(decoder->private_->input)); | ||
851 | |||
852 | for(i = id = 0; i < 4; ) { | ||
853 | if(decoder->private_->cached) { | ||
854 | x = (FLAC__uint32)decoder->private_->lookahead; | ||
855 | decoder->private_->cached = false; | ||
856 | } | ||
857 | else { | ||
858 | if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, 8, read_callback_, decoder)) | ||
859 | return false; /* the read_callback_ sets the state for us */ | ||
860 | } | ||
861 | if(x == FLAC__STREAM_SYNC_STRING[i]) { | ||
862 | first = true; | ||
863 | i++; | ||
864 | id = 0; | ||
865 | continue; | ||
866 | } | ||
867 | if(x == ID3V2_TAG_[id]) { | ||
868 | id++; | ||
869 | i = 0; | ||
870 | if(id == 3) { | ||
871 | if(!skip_id3v2_tag_(decoder)) | ||
872 | return false; /* the read_callback_ sets the state for us */ | ||
873 | } | ||
874 | continue; | ||
875 | } | ||
876 | if(x == 0xff) { /* MAGIC NUMBER for the first 8 frame sync bits */ | ||
877 | decoder->private_->header_warmup[0] = (FLAC__byte)x; | ||
878 | if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, 8, read_callback_, decoder)) | ||
879 | return false; /* the read_callback_ sets the state for us */ | ||
880 | |||
881 | /* 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 */ | ||
882 | /* else we have to check if the second byte is the end of a sync code */ | ||
883 | if(x == 0xff) { /* MAGIC NUMBER for the first 8 frame sync bits */ | ||
884 | decoder->private_->lookahead = (FLAC__byte)x; | ||
885 | decoder->private_->cached = true; | ||
886 | } | ||
887 | else if(x >> 2 == 0x3e) { /* MAGIC NUMBER for the last 6 sync bits */ | ||
888 | decoder->private_->header_warmup[1] = (FLAC__byte)x; | ||
889 | decoder->protected_->state = FLAC__STREAM_DECODER_READ_FRAME; | ||
890 | return true; | ||
891 | } | ||
892 | } | ||
893 | i = 0; | ||
894 | if(first) { | ||
895 | decoder->private_->error_callback(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC, decoder->private_->client_data); | ||
896 | first = false; | ||
897 | } | ||
898 | } | ||
899 | |||
900 | decoder->protected_->state = FLAC__STREAM_DECODER_READ_METADATA; | ||
901 | return true; | ||
902 | } | ||
903 | |||
904 | FLAC__bool read_metadata_(FLAC__StreamDecoder *decoder) | ||
905 | { | ||
906 | FLAC__bool is_last; | ||
907 | FLAC__uint32 i, x, type, length; | ||
908 | |||
909 | FLAC__ASSERT(FLAC__bitbuffer_is_consumed_byte_aligned(decoder->private_->input)); | ||
910 | |||
911 | if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_IS_LAST_LEN, read_callback_, decoder)) | ||
912 | return false; /* the read_callback_ sets the state for us */ | ||
913 | is_last = x? true : false; | ||
914 | |||
915 | if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &type, FLAC__STREAM_METADATA_TYPE_LEN, read_callback_, decoder)) | ||
916 | return false; /* the read_callback_ sets the state for us */ | ||
917 | |||
918 | if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &length, FLAC__STREAM_METADATA_LENGTH_LEN, read_callback_, decoder)) | ||
919 | return false; /* the read_callback_ sets the state for us */ | ||
920 | |||
921 | if(type == FLAC__METADATA_TYPE_STREAMINFO) { | ||
922 | if(!read_metadata_streaminfo_(decoder, is_last, length)) | ||
923 | return false; | ||
924 | |||
925 | decoder->private_->has_stream_info = true; | ||
926 | if(decoder->private_->metadata_filter[FLAC__METADATA_TYPE_STREAMINFO]) | ||
927 | decoder->private_->metadata_callback(decoder, &decoder->private_->stream_info, decoder->private_->client_data); | ||
928 | } | ||
929 | else if(type == FLAC__METADATA_TYPE_SEEKTABLE) { | ||
930 | if(!read_metadata_seektable_(decoder, is_last, length)) | ||
931 | return false; | ||
932 | |||
933 | decoder->private_->has_seek_table = true; | ||
934 | if(decoder->private_->metadata_filter[FLAC__METADATA_TYPE_SEEKTABLE]) | ||
935 | decoder->private_->metadata_callback(decoder, &decoder->private_->seek_table, decoder->private_->client_data); | ||
936 | } | ||
937 | else { | ||
938 | FLAC__bool skip_it = !decoder->private_->metadata_filter[type]; | ||
939 | unsigned real_length = length; | ||
940 | FLAC__StreamMetadata block; | ||
941 | |||
942 | block.is_last = is_last; | ||
943 | block.type = (FLAC__MetadataType)type; | ||
944 | block.length = length; | ||
945 | |||
946 | if(type == FLAC__METADATA_TYPE_APPLICATION) { | ||
947 | if(!FLAC__bitbuffer_read_byte_block_aligned_no_crc(decoder->private_->input, block.data.application.id, FLAC__STREAM_METADATA_APPLICATION_ID_LEN/8, read_callback_, decoder)) | ||
948 | return false; /* the read_callback_ sets the state for us */ | ||
949 | |||
950 | real_length -= FLAC__STREAM_METADATA_APPLICATION_ID_LEN/8; | ||
951 | |||
952 | if(decoder->private_->metadata_filter_ids_count > 0 && has_id_filtered_(decoder, block.data.application.id)) | ||
953 | skip_it = !skip_it; | ||
954 | } | ||
955 | |||
956 | if(skip_it) { | ||
957 | if(!FLAC__bitbuffer_read_byte_block_aligned_no_crc(decoder->private_->input, 0, real_length, read_callback_, decoder)) | ||
958 | return false; /* the read_callback_ sets the state for us */ | ||
959 | } | ||
960 | else { | ||
961 | switch(type) { | ||
962 | case FLAC__METADATA_TYPE_PADDING: | ||
963 | /* skip the padding bytes */ | ||
964 | if(!FLAC__bitbuffer_read_byte_block_aligned_no_crc(decoder->private_->input, 0, real_length, read_callback_, decoder)) | ||
965 | return false; /* the read_callback_ sets the state for us */ | ||
966 | break; | ||
967 | case FLAC__METADATA_TYPE_APPLICATION: | ||
968 | /* remember, we read the ID already */ | ||
969 | if(real_length > 0) { | ||
970 | if(0 == (block.data.application.data = (FLAC__byte*)malloc(real_length))) { | ||
971 | decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR; | ||
972 | return false; | ||
973 | } | ||
974 | if(!FLAC__bitbuffer_read_byte_block_aligned_no_crc(decoder->private_->input, block.data.application.data, real_length, read_callback_, decoder)) | ||
975 | return false; /* the read_callback_ sets the state for us */ | ||
976 | } | ||
977 | else | ||
978 | block.data.application.data = 0; | ||
979 | break; | ||
980 | case FLAC__METADATA_TYPE_VORBIS_COMMENT: | ||
981 | if(!read_metadata_vorbiscomment_(decoder, &block.data.vorbis_comment)) | ||
982 | return false; | ||
983 | break; | ||
984 | case FLAC__METADATA_TYPE_CUESHEET: | ||
985 | if(!read_metadata_cuesheet_(decoder, &block.data.cue_sheet)) | ||
986 | return false; | ||
987 | break; | ||
988 | case FLAC__METADATA_TYPE_STREAMINFO: | ||
989 | case FLAC__METADATA_TYPE_SEEKTABLE: | ||
990 | FLAC__ASSERT(0); | ||
991 | break; | ||
992 | default: | ||
993 | if(real_length > 0) { | ||
994 | if(0 == (block.data.unknown.data = (FLAC__byte*)malloc(real_length))) { | ||
995 | decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR; | ||
996 | return false; | ||
997 | } | ||
998 | if(!FLAC__bitbuffer_read_byte_block_aligned_no_crc(decoder->private_->input, block.data.unknown.data, real_length, read_callback_, decoder)) | ||
999 | return false; /* the read_callback_ sets the state for us */ | ||
1000 | } | ||
1001 | else | ||
1002 | block.data.unknown.data = 0; | ||
1003 | break; | ||
1004 | } | ||
1005 | decoder->private_->metadata_callback(decoder, &block, decoder->private_->client_data); | ||
1006 | |||
1007 | /* now we have to free any malloc'ed data in the block */ | ||
1008 | switch(type) { | ||
1009 | case FLAC__METADATA_TYPE_PADDING: | ||
1010 | break; | ||
1011 | case FLAC__METADATA_TYPE_APPLICATION: | ||
1012 | if(0 != block.data.application.data) | ||
1013 | free(block.data.application.data); | ||
1014 | break; | ||
1015 | case FLAC__METADATA_TYPE_VORBIS_COMMENT: | ||
1016 | if(0 != block.data.vorbis_comment.vendor_string.entry) | ||
1017 | free(block.data.vorbis_comment.vendor_string.entry); | ||
1018 | if(block.data.vorbis_comment.num_comments > 0) | ||
1019 | for(i = 0; i < block.data.vorbis_comment.num_comments; i++) | ||
1020 | if(0 != block.data.vorbis_comment.comments[i].entry) | ||
1021 | free(block.data.vorbis_comment.comments[i].entry); | ||
1022 | if(0 != block.data.vorbis_comment.comments) | ||
1023 | free(block.data.vorbis_comment.comments); | ||
1024 | break; | ||
1025 | case FLAC__METADATA_TYPE_CUESHEET: | ||
1026 | if(block.data.cue_sheet.num_tracks > 0) | ||
1027 | for(i = 0; i < block.data.cue_sheet.num_tracks; i++) | ||
1028 | if(0 != block.data.cue_sheet.tracks[i].indices) | ||
1029 | free(block.data.cue_sheet.tracks[i].indices); | ||
1030 | if(0 != block.data.cue_sheet.tracks) | ||
1031 | free(block.data.cue_sheet.tracks); | ||
1032 | break; | ||
1033 | case FLAC__METADATA_TYPE_STREAMINFO: | ||
1034 | case FLAC__METADATA_TYPE_SEEKTABLE: | ||
1035 | FLAC__ASSERT(0); | ||
1036 | default: | ||
1037 | if(0 != block.data.unknown.data) | ||
1038 | free(block.data.unknown.data); | ||
1039 | break; | ||
1040 | } | ||
1041 | } | ||
1042 | } | ||
1043 | |||
1044 | if(is_last) | ||
1045 | decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC; | ||
1046 | |||
1047 | return true; | ||
1048 | } | ||
1049 | |||
1050 | FLAC__bool read_metadata_streaminfo_(FLAC__StreamDecoder *decoder, FLAC__bool is_last, unsigned length) | ||
1051 | { | ||
1052 | FLAC__uint32 x; | ||
1053 | unsigned bits, used_bits = 0; | ||
1054 | |||
1055 | FLAC__ASSERT(FLAC__bitbuffer_is_consumed_byte_aligned(decoder->private_->input)); | ||
1056 | |||
1057 | decoder->private_->stream_info.type = FLAC__METADATA_TYPE_STREAMINFO; | ||
1058 | decoder->private_->stream_info.is_last = is_last; | ||
1059 | decoder->private_->stream_info.length = length; | ||
1060 | |||
1061 | bits = FLAC__STREAM_METADATA_STREAMINFO_MIN_BLOCK_SIZE_LEN; | ||
1062 | if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, bits, read_callback_, decoder)) | ||
1063 | return false; /* the read_callback_ sets the state for us */ | ||
1064 | decoder->private_->stream_info.data.stream_info.min_blocksize = x; | ||
1065 | used_bits += bits; | ||
1066 | |||
1067 | bits = FLAC__STREAM_METADATA_STREAMINFO_MAX_BLOCK_SIZE_LEN; | ||
1068 | if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_STREAMINFO_MAX_BLOCK_SIZE_LEN, read_callback_, decoder)) | ||
1069 | return false; /* the read_callback_ sets the state for us */ | ||
1070 | decoder->private_->stream_info.data.stream_info.max_blocksize = x; | ||
1071 | used_bits += bits; | ||
1072 | |||
1073 | bits = FLAC__STREAM_METADATA_STREAMINFO_MIN_FRAME_SIZE_LEN; | ||
1074 | if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_STREAMINFO_MIN_FRAME_SIZE_LEN, read_callback_, decoder)) | ||
1075 | return false; /* the read_callback_ sets the state for us */ | ||
1076 | decoder->private_->stream_info.data.stream_info.min_framesize = x; | ||
1077 | used_bits += bits; | ||
1078 | |||
1079 | bits = FLAC__STREAM_METADATA_STREAMINFO_MAX_FRAME_SIZE_LEN; | ||
1080 | if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_STREAMINFO_MAX_FRAME_SIZE_LEN, read_callback_, decoder)) | ||
1081 | return false; /* the read_callback_ sets the state for us */ | ||
1082 | decoder->private_->stream_info.data.stream_info.max_framesize = x; | ||
1083 | used_bits += bits; | ||
1084 | |||
1085 | bits = FLAC__STREAM_METADATA_STREAMINFO_SAMPLE_RATE_LEN; | ||
1086 | if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_STREAMINFO_SAMPLE_RATE_LEN, read_callback_, decoder)) | ||
1087 | return false; /* the read_callback_ sets the state for us */ | ||
1088 | decoder->private_->stream_info.data.stream_info.sample_rate = x; | ||
1089 | used_bits += bits; | ||
1090 | |||
1091 | bits = FLAC__STREAM_METADATA_STREAMINFO_CHANNELS_LEN; | ||
1092 | if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_STREAMINFO_CHANNELS_LEN, read_callback_, decoder)) | ||
1093 | return false; /* the read_callback_ sets the state for us */ | ||
1094 | decoder->private_->stream_info.data.stream_info.channels = x+1; | ||
1095 | used_bits += bits; | ||
1096 | |||
1097 | bits = FLAC__STREAM_METADATA_STREAMINFO_BITS_PER_SAMPLE_LEN; | ||
1098 | if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_STREAMINFO_BITS_PER_SAMPLE_LEN, read_callback_, decoder)) | ||
1099 | return false; /* the read_callback_ sets the state for us */ | ||
1100 | decoder->private_->stream_info.data.stream_info.bits_per_sample = x+1; | ||
1101 | used_bits += bits; | ||
1102 | |||
1103 | bits = FLAC__STREAM_METADATA_STREAMINFO_TOTAL_SAMPLES_LEN; | ||
1104 | if(!FLAC__bitbuffer_read_raw_uint64(decoder->private_->input, &decoder->private_->stream_info.data.stream_info.total_samples, FLAC__STREAM_METADATA_STREAMINFO_TOTAL_SAMPLES_LEN, read_callback_, decoder)) | ||
1105 | return false; /* the read_callback_ sets the state for us */ | ||
1106 | used_bits += bits; | ||
1107 | |||
1108 | if(!FLAC__bitbuffer_read_byte_block_aligned_no_crc(decoder->private_->input, decoder->private_->stream_info.data.stream_info.md5sum, 16, read_callback_, decoder)) | ||
1109 | return false; /* the read_callback_ sets the state for us */ | ||
1110 | used_bits += 16*8; | ||
1111 | |||
1112 | /* skip the rest of the block */ | ||
1113 | FLAC__ASSERT(used_bits % 8 == 0); | ||
1114 | length -= (used_bits / 8); | ||
1115 | if(!FLAC__bitbuffer_read_byte_block_aligned_no_crc(decoder->private_->input, 0, length, read_callback_, decoder)) | ||
1116 | return false; /* the read_callback_ sets the state for us */ | ||
1117 | |||
1118 | return true; | ||
1119 | } | ||
1120 | |||
1121 | FLAC__bool read_metadata_seektable_(FLAC__StreamDecoder *decoder, FLAC__bool is_last, unsigned length) | ||
1122 | { | ||
1123 | FLAC__uint32 i, x; | ||
1124 | FLAC__uint64 xx; | ||
1125 | |||
1126 | FLAC__ASSERT(FLAC__bitbuffer_is_consumed_byte_aligned(decoder->private_->input)); | ||
1127 | |||
1128 | decoder->private_->seek_table.type = FLAC__METADATA_TYPE_SEEKTABLE; | ||
1129 | decoder->private_->seek_table.is_last = is_last; | ||
1130 | decoder->private_->seek_table.length = length; | ||
1131 | |||
1132 | decoder->private_->seek_table.data.seek_table.num_points = length / FLAC__STREAM_METADATA_SEEKPOINT_LENGTH; | ||
1133 | |||
1134 | /* use realloc since we may pass through here several times (e.g. after seeking) */ | ||
1135 | if(0 == (decoder->private_->seek_table.data.seek_table.points = (FLAC__StreamMetadata_SeekPoint*)realloc(decoder->private_->seek_table.data.seek_table.points, decoder->private_->seek_table.data.seek_table.num_points * sizeof(FLAC__StreamMetadata_SeekPoint)))) { | ||
1136 | decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR; | ||
1137 | return false; | ||
1138 | } | ||
1139 | for(i = 0; i < decoder->private_->seek_table.data.seek_table.num_points; i++) { | ||
1140 | if(!FLAC__bitbuffer_read_raw_uint64(decoder->private_->input, &xx, FLAC__STREAM_METADATA_SEEKPOINT_SAMPLE_NUMBER_LEN, read_callback_, decoder)) | ||
1141 | return false; /* the read_callback_ sets the state for us */ | ||
1142 | decoder->private_->seek_table.data.seek_table.points[i].sample_number = xx; | ||
1143 | |||
1144 | if(!FLAC__bitbuffer_read_raw_uint64(decoder->private_->input, &xx, FLAC__STREAM_METADATA_SEEKPOINT_STREAM_OFFSET_LEN, read_callback_, decoder)) | ||
1145 | return false; /* the read_callback_ sets the state for us */ | ||
1146 | decoder->private_->seek_table.data.seek_table.points[i].stream_offset = xx; | ||
1147 | |||
1148 | if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_SEEKPOINT_FRAME_SAMPLES_LEN, read_callback_, decoder)) | ||
1149 | return false; /* the read_callback_ sets the state for us */ | ||
1150 | decoder->private_->seek_table.data.seek_table.points[i].frame_samples = x; | ||
1151 | } | ||
1152 | length -= (decoder->private_->seek_table.data.seek_table.num_points * FLAC__STREAM_METADATA_SEEKPOINT_LENGTH); | ||
1153 | /* if there is a partial point left, skip over it */ | ||
1154 | if(length > 0) { | ||
1155 | /*@@@ do an error_callback() here? there's an argument for either way */ | ||
1156 | if(!FLAC__bitbuffer_read_byte_block_aligned_no_crc(decoder->private_->input, 0, length, read_callback_, decoder)) | ||
1157 | return false; /* the read_callback_ sets the state for us */ | ||
1158 | } | ||
1159 | |||
1160 | return true; | ||
1161 | } | ||
1162 | |||
1163 | FLAC__bool read_metadata_vorbiscomment_(FLAC__StreamDecoder *decoder, FLAC__StreamMetadata_VorbisComment *obj) | ||
1164 | { | ||
1165 | FLAC__uint32 i; | ||
1166 | |||
1167 | FLAC__ASSERT(FLAC__bitbuffer_is_consumed_byte_aligned(decoder->private_->input)); | ||
1168 | |||
1169 | /* read vendor string */ | ||
1170 | FLAC__ASSERT(FLAC__STREAM_METADATA_VORBIS_COMMENT_ENTRY_LENGTH_LEN == 32); | ||
1171 | if(!FLAC__bitbuffer_read_raw_uint32_little_endian(decoder->private_->input, &obj->vendor_string.length, read_callback_, decoder)) | ||
1172 | return false; /* the read_callback_ sets the state for us */ | ||
1173 | if(obj->vendor_string.length > 0) { | ||
1174 | if(0 == (obj->vendor_string.entry = (FLAC__byte*)malloc(obj->vendor_string.length+1))) { | ||
1175 | decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR; | ||
1176 | return false; | ||
1177 | } | ||
1178 | if(!FLAC__bitbuffer_read_byte_block_aligned_no_crc(decoder->private_->input, obj->vendor_string.entry, obj->vendor_string.length, read_callback_, decoder)) | ||
1179 | return false; /* the read_callback_ sets the state for us */ | ||
1180 | obj->vendor_string.entry[obj->vendor_string.length] = '\0'; | ||
1181 | } | ||
1182 | else | ||
1183 | obj->vendor_string.entry = 0; | ||
1184 | |||
1185 | /* read num comments */ | ||
1186 | FLAC__ASSERT(FLAC__STREAM_METADATA_VORBIS_COMMENT_NUM_COMMENTS_LEN == 32); | ||
1187 | if(!FLAC__bitbuffer_read_raw_uint32_little_endian(decoder->private_->input, &obj->num_comments, read_callback_, decoder)) | ||
1188 | return false; /* the read_callback_ sets the state for us */ | ||
1189 | |||
1190 | /* read comments */ | ||
1191 | if(obj->num_comments > 0) { | ||
1192 | if(0 == (obj->comments = (FLAC__StreamMetadata_VorbisComment_Entry*)malloc(obj->num_comments * sizeof(FLAC__StreamMetadata_VorbisComment_Entry)))) { | ||
1193 | decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR; | ||
1194 | return false; | ||
1195 | } | ||
1196 | for(i = 0; i < obj->num_comments; i++) { | ||
1197 | FLAC__ASSERT(FLAC__STREAM_METADATA_VORBIS_COMMENT_ENTRY_LENGTH_LEN == 32); | ||
1198 | if(!FLAC__bitbuffer_read_raw_uint32_little_endian(decoder->private_->input, &obj->comments[i].length, read_callback_, decoder)) | ||
1199 | return false; /* the read_callback_ sets the state for us */ | ||
1200 | if(obj->comments[i].length > 0) { | ||
1201 | if(0 == (obj->comments[i].entry = (FLAC__byte*)malloc(obj->comments[i].length+1))) { | ||
1202 | decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR; | ||
1203 | return false; | ||
1204 | } | ||
1205 | if(!FLAC__bitbuffer_read_byte_block_aligned_no_crc(decoder->private_->input, obj->comments[i].entry, obj->comments[i].length, read_callback_, decoder)) | ||
1206 | return false; /* the read_callback_ sets the state for us */ | ||
1207 | obj->comments[i].entry[obj->comments[i].length] = '\0'; | ||
1208 | } | ||
1209 | else | ||
1210 | obj->comments[i].entry = 0; | ||
1211 | } | ||
1212 | } | ||
1213 | else { | ||
1214 | obj->comments = 0; | ||
1215 | } | ||
1216 | |||
1217 | return true; | ||
1218 | } | ||
1219 | |||
1220 | FLAC__bool read_metadata_cuesheet_(FLAC__StreamDecoder *decoder, FLAC__StreamMetadata_CueSheet *obj) | ||
1221 | { | ||
1222 | FLAC__uint32 i, j, x; | ||
1223 | |||
1224 | FLAC__ASSERT(FLAC__bitbuffer_is_consumed_byte_aligned(decoder->private_->input)); | ||
1225 | |||
1226 | memset(obj, 0, sizeof(FLAC__StreamMetadata_CueSheet)); | ||
1227 | |||
1228 | FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_MEDIA_CATALOG_NUMBER_LEN % 8 == 0); | ||
1229 | if(!FLAC__bitbuffer_read_byte_block_aligned_no_crc(decoder->private_->input, (FLAC__byte*)obj->media_catalog_number, FLAC__STREAM_METADATA_CUESHEET_MEDIA_CATALOG_NUMBER_LEN/8, read_callback_, decoder)) | ||
1230 | return false; /* the read_callback_ sets the state for us */ | ||
1231 | |||
1232 | if(!FLAC__bitbuffer_read_raw_uint64(decoder->private_->input, &obj->lead_in, FLAC__STREAM_METADATA_CUESHEET_LEAD_IN_LEN, read_callback_, decoder)) | ||
1233 | return false; /* the read_callback_ sets the state for us */ | ||
1234 | |||
1235 | if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_CUESHEET_IS_CD_LEN, read_callback_, decoder)) | ||
1236 | return false; /* the read_callback_ sets the state for us */ | ||
1237 | obj->is_cd = x? true : false; | ||
1238 | |||
1239 | if(!FLAC__bitbuffer_skip_bits_no_crc(decoder->private_->input, FLAC__STREAM_METADATA_CUESHEET_RESERVED_LEN, read_callback_, decoder)) | ||
1240 | return false; /* the read_callback_ sets the state for us */ | ||
1241 | |||
1242 | if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_CUESHEET_NUM_TRACKS_LEN, read_callback_, decoder)) | ||
1243 | return false; /* the read_callback_ sets the state for us */ | ||
1244 | obj->num_tracks = x; | ||
1245 | |||
1246 | if(obj->num_tracks > 0) { | ||
1247 | if(0 == (obj->tracks = (FLAC__StreamMetadata_CueSheet_Track*)calloc(obj->num_tracks, sizeof(FLAC__StreamMetadata_CueSheet_Track)))) { | ||
1248 | decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR; | ||
1249 | return false; | ||
1250 | } | ||
1251 | for(i = 0; i < obj->num_tracks; i++) { | ||
1252 | FLAC__StreamMetadata_CueSheet_Track *track = &obj->tracks[i]; | ||
1253 | if(!FLAC__bitbuffer_read_raw_uint64(decoder->private_->input, &track->offset, FLAC__STREAM_METADATA_CUESHEET_TRACK_OFFSET_LEN, read_callback_, decoder)) | ||
1254 | return false; /* the read_callback_ sets the state for us */ | ||
1255 | |||
1256 | if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_CUESHEET_TRACK_NUMBER_LEN, read_callback_, decoder)) | ||
1257 | return false; /* the read_callback_ sets the state for us */ | ||
1258 | track->number = (FLAC__byte)x; | ||
1259 | |||
1260 | FLAC__ASSERT(FLAC__STREAM_METADATA_CUESHEET_TRACK_ISRC_LEN % 8 == 0); | ||
1261 | if(!FLAC__bitbuffer_read_byte_block_aligned_no_crc(decoder->private_->input, (FLAC__byte*)track->isrc, FLAC__STREAM_METADATA_CUESHEET_TRACK_ISRC_LEN/8, read_callback_, decoder)) | ||
1262 | return false; /* the read_callback_ sets the state for us */ | ||
1263 | |||
1264 | if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_CUESHEET_TRACK_TYPE_LEN, read_callback_, decoder)) | ||
1265 | return false; /* the read_callback_ sets the state for us */ | ||
1266 | track->type = x; | ||
1267 | |||
1268 | if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_CUESHEET_TRACK_PRE_EMPHASIS_LEN, read_callback_, decoder)) | ||
1269 | return false; /* the read_callback_ sets the state for us */ | ||
1270 | track->pre_emphasis = x; | ||
1271 | |||
1272 | if(!FLAC__bitbuffer_skip_bits_no_crc(decoder->private_->input, FLAC__STREAM_METADATA_CUESHEET_TRACK_RESERVED_LEN, read_callback_, decoder)) | ||
1273 | return false; /* the read_callback_ sets the state for us */ | ||
1274 | |||
1275 | if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_CUESHEET_TRACK_NUM_INDICES_LEN, read_callback_, decoder)) | ||
1276 | return false; /* the read_callback_ sets the state for us */ | ||
1277 | track->num_indices = (FLAC__byte)x; | ||
1278 | |||
1279 | if(track->num_indices > 0) { | ||
1280 | if(0 == (track->indices = (FLAC__StreamMetadata_CueSheet_Index*)calloc(track->num_indices, sizeof(FLAC__StreamMetadata_CueSheet_Index)))) { | ||
1281 | decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR; | ||
1282 | return false; | ||
1283 | } | ||
1284 | for(j = 0; j < track->num_indices; j++) { | ||
1285 | FLAC__StreamMetadata_CueSheet_Index *index = &track->indices[j]; | ||
1286 | if(!FLAC__bitbuffer_read_raw_uint64(decoder->private_->input, &index->offset, FLAC__STREAM_METADATA_CUESHEET_INDEX_OFFSET_LEN, read_callback_, decoder)) | ||
1287 | return false; /* the read_callback_ sets the state for us */ | ||
1288 | |||
1289 | if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, FLAC__STREAM_METADATA_CUESHEET_INDEX_NUMBER_LEN, read_callback_, decoder)) | ||
1290 | return false; /* the read_callback_ sets the state for us */ | ||
1291 | index->number = (FLAC__byte)x; | ||
1292 | |||
1293 | if(!FLAC__bitbuffer_skip_bits_no_crc(decoder->private_->input, FLAC__STREAM_METADATA_CUESHEET_INDEX_RESERVED_LEN, read_callback_, decoder)) | ||
1294 | return false; /* the read_callback_ sets the state for us */ | ||
1295 | } | ||
1296 | } | ||
1297 | } | ||
1298 | } | ||
1299 | |||
1300 | return true; | ||
1301 | } | ||
1302 | |||
1303 | FLAC__bool skip_id3v2_tag_(FLAC__StreamDecoder *decoder) | ||
1304 | { | ||
1305 | FLAC__uint32 x; | ||
1306 | unsigned i, skip; | ||
1307 | |||
1308 | /* skip the version and flags bytes */ | ||
1309 | if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, 24, read_callback_, decoder)) | ||
1310 | return false; /* the read_callback_ sets the state for us */ | ||
1311 | /* get the size (in bytes) to skip */ | ||
1312 | skip = 0; | ||
1313 | for(i = 0; i < 4; i++) { | ||
1314 | if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, 8, read_callback_, decoder)) | ||
1315 | return false; /* the read_callback_ sets the state for us */ | ||
1316 | skip <<= 7; | ||
1317 | skip |= (x & 0x7f); | ||
1318 | } | ||
1319 | /* skip the rest of the tag */ | ||
1320 | if(!FLAC__bitbuffer_read_byte_block_aligned_no_crc(decoder->private_->input, 0, skip, read_callback_, decoder)) | ||
1321 | return false; /* the read_callback_ sets the state for us */ | ||
1322 | return true; | ||
1323 | } | ||
1324 | |||
1325 | FLAC__bool frame_sync_(FLAC__StreamDecoder *decoder) | ||
1326 | { | ||
1327 | FLAC__uint32 x; | ||
1328 | FLAC__bool first = true; | ||
1329 | |||
1330 | /* If we know the total number of samples in the stream, stop if we've read that many. */ | ||
1331 | /* This will stop us, for example, from wasting time trying to sync on an ID3V1 tag. */ | ||
1332 | if(decoder->private_->has_stream_info && decoder->private_->stream_info.data.stream_info.total_samples) { | ||
1333 | if(decoder->private_->samples_decoded >= decoder->private_->stream_info.data.stream_info.total_samples) { | ||
1334 | decoder->protected_->state = FLAC__STREAM_DECODER_END_OF_STREAM; | ||
1335 | return true; | ||
1336 | } | ||
1337 | } | ||
1338 | |||
1339 | /* make sure we're byte aligned */ | ||
1340 | if(!FLAC__bitbuffer_is_consumed_byte_aligned(decoder->private_->input)) { | ||
1341 | if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, FLAC__bitbuffer_bits_left_for_byte_alignment(decoder->private_->input), read_callback_, decoder)) | ||
1342 | return false; /* the read_callback_ sets the state for us */ | ||
1343 | } | ||
1344 | |||
1345 | while(1) { | ||
1346 | if(decoder->private_->cached) { | ||
1347 | x = (FLAC__uint32)decoder->private_->lookahead; | ||
1348 | decoder->private_->cached = false; | ||
1349 | } | ||
1350 | else { | ||
1351 | if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, 8, read_callback_, decoder)) | ||
1352 | return false; /* the read_callback_ sets the state for us */ | ||
1353 | } | ||
1354 | if(x == 0xff) { /* MAGIC NUMBER for the first 8 frame sync bits */ | ||
1355 | decoder->private_->header_warmup[0] = (FLAC__byte)x; | ||
1356 | if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, 8, read_callback_, decoder)) | ||
1357 | return false; /* the read_callback_ sets the state for us */ | ||
1358 | |||
1359 | /* 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 */ | ||
1360 | /* else we have to check if the second byte is the end of a sync code */ | ||
1361 | if(x == 0xff) { /* MAGIC NUMBER for the first 8 frame sync bits */ | ||
1362 | decoder->private_->lookahead = (FLAC__byte)x; | ||
1363 | decoder->private_->cached = true; | ||
1364 | } | ||
1365 | else if(x >> 2 == 0x3e) { /* MAGIC NUMBER for the last 6 sync bits */ | ||
1366 | decoder->private_->header_warmup[1] = (FLAC__byte)x; | ||
1367 | decoder->protected_->state = FLAC__STREAM_DECODER_READ_FRAME; | ||
1368 | return true; | ||
1369 | } | ||
1370 | } | ||
1371 | if(first) { | ||
1372 | decoder->private_->error_callback(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC, decoder->private_->client_data); | ||
1373 | first = false; | ||
1374 | } | ||
1375 | } | ||
1376 | |||
1377 | return true; | ||
1378 | } | ||
1379 | |||
1380 | FLAC__bool read_frame_(FLAC__StreamDecoder *decoder, FLAC__bool *got_a_frame, FLAC__bool do_full_decode) | ||
1381 | { | ||
1382 | unsigned channel; | ||
1383 | unsigned i; | ||
1384 | FLAC__int32 mid, side, left, right; | ||
1385 | FLAC__uint16 frame_crc; /* the one we calculate from the input stream */ | ||
1386 | FLAC__uint32 x; | ||
1387 | |||
1388 | *got_a_frame = false; | ||
1389 | |||
1390 | /* init the CRC */ | ||
1391 | frame_crc = 0; | ||
1392 | FLAC__CRC16_UPDATE(decoder->private_->header_warmup[0], frame_crc); | ||
1393 | FLAC__CRC16_UPDATE(decoder->private_->header_warmup[1], frame_crc); | ||
1394 | FLAC__bitbuffer_reset_read_crc16(decoder->private_->input, frame_crc); | ||
1395 | |||
1396 | if(!read_frame_header_(decoder)) | ||
1397 | return false; | ||
1398 | if(decoder->protected_->state == FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC) | ||
1399 | return true; | ||
1400 | if(!allocate_output_(decoder, decoder->private_->frame.header.blocksize, decoder->private_->frame.header.channels)) | ||
1401 | return false; | ||
1402 | for(channel = 0; channel < decoder->private_->frame.header.channels; channel++) { | ||
1403 | /* | ||
1404 | * first figure the correct bits-per-sample of the subframe | ||
1405 | */ | ||
1406 | unsigned bps = decoder->private_->frame.header.bits_per_sample; | ||
1407 | switch(decoder->private_->frame.header.channel_assignment) { | ||
1408 | case FLAC__CHANNEL_ASSIGNMENT_INDEPENDENT: | ||
1409 | /* no adjustment needed */ | ||
1410 | break; | ||
1411 | case FLAC__CHANNEL_ASSIGNMENT_LEFT_SIDE: | ||
1412 | FLAC__ASSERT(decoder->private_->frame.header.channels == 2); | ||
1413 | if(channel == 1) | ||
1414 | bps++; | ||
1415 | break; | ||
1416 | case FLAC__CHANNEL_ASSIGNMENT_RIGHT_SIDE: | ||
1417 | FLAC__ASSERT(decoder->private_->frame.header.channels == 2); | ||
1418 | if(channel == 0) | ||
1419 | bps++; | ||
1420 | break; | ||
1421 | case FLAC__CHANNEL_ASSIGNMENT_MID_SIDE: | ||
1422 | FLAC__ASSERT(decoder->private_->frame.header.channels == 2); | ||
1423 | if(channel == 1) | ||
1424 | bps++; | ||
1425 | break; | ||
1426 | default: | ||
1427 | FLAC__ASSERT(0); | ||
1428 | } | ||
1429 | /* | ||
1430 | * now read it | ||
1431 | */ | ||
1432 | if(!read_subframe_(decoder, channel, bps, do_full_decode)) | ||
1433 | return false; | ||
1434 | if(decoder->protected_->state != FLAC__STREAM_DECODER_READ_FRAME) { | ||
1435 | decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC; | ||
1436 | return true; | ||
1437 | } | ||
1438 | } | ||
1439 | if(!read_zero_padding_(decoder)) | ||
1440 | return false; | ||
1441 | |||
1442 | /* | ||
1443 | * Read the frame CRC-16 from the footer and check | ||
1444 | */ | ||
1445 | frame_crc = FLAC__bitbuffer_get_read_crc16(decoder->private_->input); | ||
1446 | if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, FLAC__FRAME_FOOTER_CRC_LEN, read_callback_, decoder)) | ||
1447 | return false; /* the read_callback_ sets the state for us */ | ||
1448 | if(frame_crc == (FLAC__uint16)x) { | ||
1449 | if(do_full_decode) { | ||
1450 | /* Undo any special channel coding */ | ||
1451 | switch(decoder->private_->frame.header.channel_assignment) { | ||
1452 | case FLAC__CHANNEL_ASSIGNMENT_INDEPENDENT: | ||
1453 | /* do nothing */ | ||
1454 | break; | ||
1455 | case FLAC__CHANNEL_ASSIGNMENT_LEFT_SIDE: | ||
1456 | FLAC__ASSERT(decoder->private_->frame.header.channels == 2); | ||
1457 | for(i = 0; i < decoder->private_->frame.header.blocksize; i++) | ||
1458 | decoder->private_->output[1][i] = decoder->private_->output[0][i] - decoder->private_->output[1][i]; | ||
1459 | break; | ||
1460 | case FLAC__CHANNEL_ASSIGNMENT_RIGHT_SIDE: | ||
1461 | FLAC__ASSERT(decoder->private_->frame.header.channels == 2); | ||
1462 | for(i = 0; i < decoder->private_->frame.header.blocksize; i++) | ||
1463 | decoder->private_->output[0][i] += decoder->private_->output[1][i]; | ||
1464 | break; | ||
1465 | case FLAC__CHANNEL_ASSIGNMENT_MID_SIDE: | ||
1466 | FLAC__ASSERT(decoder->private_->frame.header.channels == 2); | ||
1467 | for(i = 0; i < decoder->private_->frame.header.blocksize; i++) { | ||
1468 | mid = decoder->private_->output[0][i]; | ||
1469 | side = decoder->private_->output[1][i]; | ||
1470 | mid <<= 1; | ||
1471 | if(side & 1) /* i.e. if 'side' is odd... */ | ||
1472 | mid++; | ||
1473 | left = mid + side; | ||
1474 | right = mid - side; | ||
1475 | decoder->private_->output[0][i] = left >> 1; | ||
1476 | decoder->private_->output[1][i] = right >> 1; | ||
1477 | } | ||
1478 | break; | ||
1479 | default: | ||
1480 | FLAC__ASSERT(0); | ||
1481 | break; | ||
1482 | } | ||
1483 | } | ||
1484 | } | ||
1485 | else { | ||
1486 | /* Bad frame, emit error and zero the output signal */ | ||
1487 | decoder->private_->error_callback(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_FRAME_CRC_MISMATCH, decoder->private_->client_data); | ||
1488 | if(do_full_decode) { | ||
1489 | for(channel = 0; channel < decoder->private_->frame.header.channels; channel++) { | ||
1490 | memset(decoder->private_->output[channel], 0, sizeof(FLAC__int32) * decoder->private_->frame.header.blocksize); | ||
1491 | } | ||
1492 | } | ||
1493 | } | ||
1494 | |||
1495 | *got_a_frame = true; | ||
1496 | |||
1497 | /* put the latest values into the public section of the decoder instance */ | ||
1498 | decoder->protected_->channels = decoder->private_->frame.header.channels; | ||
1499 | decoder->protected_->channel_assignment = decoder->private_->frame.header.channel_assignment; | ||
1500 | decoder->protected_->bits_per_sample = decoder->private_->frame.header.bits_per_sample; | ||
1501 | decoder->protected_->sample_rate = decoder->private_->frame.header.sample_rate; | ||
1502 | decoder->protected_->blocksize = decoder->private_->frame.header.blocksize; | ||
1503 | |||
1504 | FLAC__ASSERT(decoder->private_->frame.header.number_type == FLAC__FRAME_NUMBER_TYPE_SAMPLE_NUMBER); | ||
1505 | decoder->private_->samples_decoded = decoder->private_->frame.header.number.sample_number + decoder->private_->frame.header.blocksize; | ||
1506 | |||
1507 | /* write it */ | ||
1508 | if(do_full_decode) { | ||
1509 | if(decoder->private_->write_callback(decoder, &decoder->private_->frame, (const FLAC__int32 * const *)decoder->private_->output, decoder->private_->client_data) != FLAC__STREAM_DECODER_WRITE_STATUS_CONTINUE) | ||
1510 | return false; | ||
1511 | } | ||
1512 | |||
1513 | decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC; | ||
1514 | return true; | ||
1515 | } | ||
1516 | |||
1517 | FLAC__bool read_frame_header_(FLAC__StreamDecoder *decoder) | ||
1518 | { | ||
1519 | FLAC__uint32 x; | ||
1520 | FLAC__uint64 xx; | ||
1521 | unsigned i, blocksize_hint = 0, sample_rate_hint = 0; | ||
1522 | FLAC__byte crc8, raw_header[16]; /* MAGIC NUMBER based on the maximum frame header size, including CRC */ | ||
1523 | unsigned raw_header_len; | ||
1524 | FLAC__bool is_unparseable = false; | ||
1525 | const FLAC__bool is_known_variable_blocksize_stream = (decoder->private_->has_stream_info && decoder->private_->stream_info.data.stream_info.min_blocksize != decoder->private_->stream_info.data.stream_info.max_blocksize); | ||
1526 | const FLAC__bool is_known_fixed_blocksize_stream = (decoder->private_->has_stream_info && decoder->private_->stream_info.data.stream_info.min_blocksize == decoder->private_->stream_info.data.stream_info.max_blocksize); | ||
1527 | |||
1528 | FLAC__ASSERT(FLAC__bitbuffer_is_consumed_byte_aligned(decoder->private_->input)); | ||
1529 | |||
1530 | /* init the raw header with the saved bits from synchronization */ | ||
1531 | raw_header[0] = decoder->private_->header_warmup[0]; | ||
1532 | raw_header[1] = decoder->private_->header_warmup[1]; | ||
1533 | raw_header_len = 2; | ||
1534 | |||
1535 | /* | ||
1536 | * check to make sure that the reserved bits are 0 | ||
1537 | */ | ||
1538 | if(raw_header[1] & 0x03) { /* MAGIC NUMBER */ | ||
1539 | is_unparseable = true; | ||
1540 | } | ||
1541 | |||
1542 | /* | ||
1543 | * Note that along the way as we read the header, we look for a sync | ||
1544 | * code inside. If we find one it would indicate that our original | ||
1545 | * sync was bad since there cannot be a sync code in a valid header. | ||
1546 | */ | ||
1547 | |||
1548 | /* | ||
1549 | * read in the raw header as bytes so we can CRC it, and parse it on the way | ||
1550 | */ | ||
1551 | for(i = 0; i < 2; i++) { | ||
1552 | if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, 8, read_callback_, decoder)) | ||
1553 | return false; /* the read_callback_ sets the state for us */ | ||
1554 | if(x == 0xff) { /* MAGIC NUMBER for the first 8 frame sync bits */ | ||
1555 | /* if we get here it means our original sync was erroneous since the sync code cannot appear in the header */ | ||
1556 | decoder->private_->lookahead = (FLAC__byte)x; | ||
1557 | decoder->private_->cached = true; | ||
1558 | decoder->private_->error_callback(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_BAD_HEADER, decoder->private_->client_data); | ||
1559 | decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC; | ||
1560 | return true; | ||
1561 | } | ||
1562 | raw_header[raw_header_len++] = (FLAC__byte)x; | ||
1563 | } | ||
1564 | |||
1565 | switch(x = raw_header[2] >> 4) { | ||
1566 | case 0: | ||
1567 | if(is_known_fixed_blocksize_stream) | ||
1568 | decoder->private_->frame.header.blocksize = decoder->private_->stream_info.data.stream_info.min_blocksize; | ||
1569 | else | ||
1570 | is_unparseable = true; | ||
1571 | break; | ||
1572 | case 1: | ||
1573 | decoder->private_->frame.header.blocksize = 192; | ||
1574 | break; | ||
1575 | case 2: | ||
1576 | case 3: | ||
1577 | case 4: | ||
1578 | case 5: | ||
1579 | decoder->private_->frame.header.blocksize = 576 << (x-2); | ||
1580 | break; | ||
1581 | case 6: | ||
1582 | case 7: | ||
1583 | blocksize_hint = x; | ||
1584 | break; | ||
1585 | case 8: | ||
1586 | case 9: | ||
1587 | case 10: | ||
1588 | case 11: | ||
1589 | case 12: | ||
1590 | case 13: | ||
1591 | case 14: | ||
1592 | case 15: | ||
1593 | decoder->private_->frame.header.blocksize = 256 << (x-8); | ||
1594 | break; | ||
1595 | default: | ||
1596 | FLAC__ASSERT(0); | ||
1597 | break; | ||
1598 | } | ||
1599 | |||
1600 | switch(x = raw_header[2] & 0x0f) { | ||
1601 | case 0: | ||
1602 | if(decoder->private_->has_stream_info) | ||
1603 | decoder->private_->frame.header.sample_rate = decoder->private_->stream_info.data.stream_info.sample_rate; | ||
1604 | else | ||
1605 | is_unparseable = true; | ||
1606 | break; | ||
1607 | case 1: | ||
1608 | case 2: | ||
1609 | case 3: | ||
1610 | is_unparseable = true; | ||
1611 | break; | ||
1612 | case 4: | ||
1613 | decoder->private_->frame.header.sample_rate = 8000; | ||
1614 | break; | ||
1615 | case 5: | ||
1616 | decoder->private_->frame.header.sample_rate = 16000; | ||
1617 | break; | ||
1618 | case 6: | ||
1619 | decoder->private_->frame.header.sample_rate = 22050; | ||
1620 | break; | ||
1621 | case 7: | ||
1622 | decoder->private_->frame.header.sample_rate = 24000; | ||
1623 | break; | ||
1624 | case 8: | ||
1625 | decoder->private_->frame.header.sample_rate = 32000; | ||
1626 | break; | ||
1627 | case 9: | ||
1628 | decoder->private_->frame.header.sample_rate = 44100; | ||
1629 | break; | ||
1630 | case 10: | ||
1631 | decoder->private_->frame.header.sample_rate = 48000; | ||
1632 | break; | ||
1633 | case 11: | ||
1634 | decoder->private_->frame.header.sample_rate = 96000; | ||
1635 | break; | ||
1636 | case 12: | ||
1637 | case 13: | ||
1638 | case 14: | ||
1639 | sample_rate_hint = x; | ||
1640 | break; | ||
1641 | case 15: | ||
1642 | decoder->private_->error_callback(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_BAD_HEADER, decoder->private_->client_data); | ||
1643 | decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC; | ||
1644 | return true; | ||
1645 | default: | ||
1646 | FLAC__ASSERT(0); | ||
1647 | } | ||
1648 | |||
1649 | x = (unsigned)(raw_header[3] >> 4); | ||
1650 | if(x & 8) { | ||
1651 | decoder->private_->frame.header.channels = 2; | ||
1652 | switch(x & 7) { | ||
1653 | case 0: | ||
1654 | decoder->private_->frame.header.channel_assignment = FLAC__CHANNEL_ASSIGNMENT_LEFT_SIDE; | ||
1655 | break; | ||
1656 | case 1: | ||
1657 | decoder->private_->frame.header.channel_assignment = FLAC__CHANNEL_ASSIGNMENT_RIGHT_SIDE; | ||
1658 | break; | ||
1659 | case 2: | ||
1660 | decoder->private_->frame.header.channel_assignment = FLAC__CHANNEL_ASSIGNMENT_MID_SIDE; | ||
1661 | break; | ||
1662 | default: | ||
1663 | is_unparseable = true; | ||
1664 | break; | ||
1665 | } | ||
1666 | } | ||
1667 | else { | ||
1668 | decoder->private_->frame.header.channels = (unsigned)x + 1; | ||
1669 | decoder->private_->frame.header.channel_assignment = FLAC__CHANNEL_ASSIGNMENT_INDEPENDENT; | ||
1670 | } | ||
1671 | |||
1672 | switch(x = (unsigned)(raw_header[3] & 0x0e) >> 1) { | ||
1673 | case 0: | ||
1674 | if(decoder->private_->has_stream_info) | ||
1675 | decoder->private_->frame.header.bits_per_sample = decoder->private_->stream_info.data.stream_info.bits_per_sample; | ||
1676 | else | ||
1677 | is_unparseable = true; | ||
1678 | break; | ||
1679 | case 1: | ||
1680 | decoder->private_->frame.header.bits_per_sample = 8; | ||
1681 | break; | ||
1682 | case 2: | ||
1683 | decoder->private_->frame.header.bits_per_sample = 12; | ||
1684 | break; | ||
1685 | case 4: | ||
1686 | decoder->private_->frame.header.bits_per_sample = 16; | ||
1687 | break; | ||
1688 | case 5: | ||
1689 | decoder->private_->frame.header.bits_per_sample = 20; | ||
1690 | break; | ||
1691 | case 6: | ||
1692 | decoder->private_->frame.header.bits_per_sample = 24; | ||
1693 | break; | ||
1694 | case 3: | ||
1695 | case 7: | ||
1696 | is_unparseable = true; | ||
1697 | break; | ||
1698 | default: | ||
1699 | FLAC__ASSERT(0); | ||
1700 | break; | ||
1701 | } | ||
1702 | |||
1703 | if(raw_header[3] & 0x01) { /* this should be a zero padding bit */ | ||
1704 | decoder->private_->error_callback(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_BAD_HEADER, decoder->private_->client_data); | ||
1705 | decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC; | ||
1706 | return true; | ||
1707 | } | ||
1708 | |||
1709 | /* | ||
1710 | * Now we get to the regrettable consequences of not knowing for sure | ||
1711 | * whether we got a frame number or a sample number. There are no | ||
1712 | * encoders that do variable-blocksize encoding so unless we know from | ||
1713 | * the STREAMINFO that it is variable-blocksize we will assume it is | ||
1714 | * fixed-blocksize. The trouble comes when we have no STREAMINFO; again | ||
1715 | * we will guess that is fixed-blocksize. Where this can go wrong: 1) a | ||
1716 | * variable-blocksize stream with no STREAMINFO; 2) a fixed-blocksize | ||
1717 | * stream that was edited such that one or more frames before or | ||
1718 | * including this one do not have the same number of samples as the | ||
1719 | * STREAMINFO's min and max blocksize. | ||
1720 | */ | ||
1721 | if(is_known_variable_blocksize_stream) { | ||
1722 | if(blocksize_hint) { | ||
1723 | if(!FLAC__bitbuffer_read_utf8_uint64(decoder->private_->input, &xx, read_callback_, decoder, raw_header, &raw_header_len)) | ||
1724 | return false; /* the read_callback_ sets the state for us */ | ||
1725 | if(xx == FLAC__U64L(0xffffffffffffffff)) { /* i.e. non-UTF8 code... */ | ||
1726 | decoder->private_->lookahead = raw_header[raw_header_len-1]; /* back up as much as we can */ | ||
1727 | decoder->private_->cached = true; | ||
1728 | decoder->private_->error_callback(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_BAD_HEADER, decoder->private_->client_data); | ||
1729 | decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC; | ||
1730 | return true; | ||
1731 | } | ||
1732 | decoder->private_->frame.header.number_type = FLAC__FRAME_NUMBER_TYPE_SAMPLE_NUMBER; | ||
1733 | decoder->private_->frame.header.number.sample_number = xx; | ||
1734 | } | ||
1735 | else | ||
1736 | is_unparseable = true; | ||
1737 | } | ||
1738 | else { | ||
1739 | if(!FLAC__bitbuffer_read_utf8_uint32(decoder->private_->input, &x, read_callback_, decoder, raw_header, &raw_header_len)) | ||
1740 | return false; /* the read_callback_ sets the state for us */ | ||
1741 | if(x == 0xffffffff) { /* i.e. non-UTF8 code... */ | ||
1742 | decoder->private_->lookahead = raw_header[raw_header_len-1]; /* back up as much as we can */ | ||
1743 | decoder->private_->cached = true; | ||
1744 | decoder->private_->error_callback(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_BAD_HEADER, decoder->private_->client_data); | ||
1745 | decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC; | ||
1746 | return true; | ||
1747 | } | ||
1748 | decoder->private_->last_frame_number = x; | ||
1749 | decoder->private_->frame.header.number_type = FLAC__FRAME_NUMBER_TYPE_SAMPLE_NUMBER; | ||
1750 | if(decoder->private_->has_stream_info) { | ||
1751 | FLAC__ASSERT(decoder->private_->stream_info.data.stream_info.min_blocksize == decoder->private_->stream_info.data.stream_info.max_blocksize); | ||
1752 | decoder->private_->frame.header.number.sample_number = (FLAC__uint64)decoder->private_->stream_info.data.stream_info.min_blocksize * (FLAC__uint64)x; | ||
1753 | decoder->private_->last_block_size = decoder->private_->frame.header.blocksize; | ||
1754 | } | ||
1755 | else if(blocksize_hint) { | ||
1756 | if(decoder->private_->last_block_size) | ||
1757 | decoder->private_->frame.header.number.sample_number = (FLAC__uint64)decoder->private_->last_block_size * (FLAC__uint64)x; | ||
1758 | else | ||
1759 | is_unparseable = true; | ||
1760 | } | ||
1761 | else { | ||
1762 | decoder->private_->frame.header.number.sample_number = (FLAC__uint64)decoder->private_->frame.header.blocksize * (FLAC__uint64)x; | ||
1763 | decoder->private_->last_block_size = decoder->private_->frame.header.blocksize; | ||
1764 | } | ||
1765 | } | ||
1766 | |||
1767 | if(blocksize_hint) { | ||
1768 | if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, 8, read_callback_, decoder)) | ||
1769 | return false; /* the read_callback_ sets the state for us */ | ||
1770 | raw_header[raw_header_len++] = (FLAC__byte)x; | ||
1771 | if(blocksize_hint == 7) { | ||
1772 | FLAC__uint32 _x; | ||
1773 | if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &_x, 8, read_callback_, decoder)) | ||
1774 | return false; /* the read_callback_ sets the state for us */ | ||
1775 | raw_header[raw_header_len++] = (FLAC__byte)_x; | ||
1776 | x = (x << 8) | _x; | ||
1777 | } | ||
1778 | decoder->private_->frame.header.blocksize = x+1; | ||
1779 | } | ||
1780 | |||
1781 | if(sample_rate_hint) { | ||
1782 | if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, 8, read_callback_, decoder)) | ||
1783 | return false; /* the read_callback_ sets the state for us */ | ||
1784 | raw_header[raw_header_len++] = (FLAC__byte)x; | ||
1785 | if(sample_rate_hint != 12) { | ||
1786 | FLAC__uint32 _x; | ||
1787 | if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &_x, 8, read_callback_, decoder)) | ||
1788 | return false; /* the read_callback_ sets the state for us */ | ||
1789 | raw_header[raw_header_len++] = (FLAC__byte)_x; | ||
1790 | x = (x << 8) | _x; | ||
1791 | } | ||
1792 | if(sample_rate_hint == 12) | ||
1793 | decoder->private_->frame.header.sample_rate = x*1000; | ||
1794 | else if(sample_rate_hint == 13) | ||
1795 | decoder->private_->frame.header.sample_rate = x; | ||
1796 | else | ||
1797 | decoder->private_->frame.header.sample_rate = x*10; | ||
1798 | } | ||
1799 | |||
1800 | /* read the CRC-8 byte */ | ||
1801 | if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, 8, read_callback_, decoder)) | ||
1802 | return false; /* the read_callback_ sets the state for us */ | ||
1803 | crc8 = (FLAC__byte)x; | ||
1804 | |||
1805 | if(FLAC__crc8(raw_header, raw_header_len) != crc8) { | ||
1806 | decoder->private_->error_callback(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_BAD_HEADER, decoder->private_->client_data); | ||
1807 | decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC; | ||
1808 | return true; | ||
1809 | } | ||
1810 | |||
1811 | if(is_unparseable) { | ||
1812 | decoder->protected_->state = FLAC__STREAM_DECODER_UNPARSEABLE_STREAM; | ||
1813 | return false; | ||
1814 | } | ||
1815 | |||
1816 | return true; | ||
1817 | } | ||
1818 | |||
1819 | FLAC__bool read_subframe_(FLAC__StreamDecoder *decoder, unsigned channel, unsigned bps, FLAC__bool do_full_decode) | ||
1820 | { | ||
1821 | FLAC__uint32 x; | ||
1822 | FLAC__bool wasted_bits; | ||
1823 | |||
1824 | if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &x, 8, read_callback_, decoder)) /* MAGIC NUMBER */ | ||
1825 | return false; /* the read_callback_ sets the state for us */ | ||
1826 | |||
1827 | wasted_bits = (x & 1); | ||
1828 | x &= 0xfe; | ||
1829 | |||
1830 | if(wasted_bits) { | ||
1831 | unsigned u; | ||
1832 | if(!FLAC__bitbuffer_read_unary_unsigned(decoder->private_->input, &u, read_callback_, decoder)) | ||
1833 | return false; /* the read_callback_ sets the state for us */ | ||
1834 | decoder->private_->frame.subframes[channel].wasted_bits = u+1; | ||
1835 | bps -= decoder->private_->frame.subframes[channel].wasted_bits; | ||
1836 | } | ||
1837 | else | ||
1838 | decoder->private_->frame.subframes[channel].wasted_bits = 0; | ||
1839 | |||
1840 | /* | ||
1841 | * Lots of magic numbers here | ||
1842 | */ | ||
1843 | if(x & 0x80) { | ||
1844 | decoder->private_->error_callback(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC, decoder->private_->client_data); | ||
1845 | decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC; | ||
1846 | return true; | ||
1847 | } | ||
1848 | else if(x == 0) { | ||
1849 | if(!read_subframe_constant_(decoder, channel, bps, do_full_decode)) | ||
1850 | return false; | ||
1851 | } | ||
1852 | else if(x == 2) { | ||
1853 | if(!read_subframe_verbatim_(decoder, channel, bps, do_full_decode)) | ||
1854 | return false; | ||
1855 | } | ||
1856 | else if(x < 16) { | ||
1857 | decoder->protected_->state = FLAC__STREAM_DECODER_UNPARSEABLE_STREAM; | ||
1858 | return false; | ||
1859 | } | ||
1860 | else if(x <= 24) { | ||
1861 | if(!read_subframe_fixed_(decoder, channel, bps, (x>>1)&7, do_full_decode)) | ||
1862 | return false; | ||
1863 | } | ||
1864 | else if(x < 64) { | ||
1865 | decoder->protected_->state = FLAC__STREAM_DECODER_UNPARSEABLE_STREAM; | ||
1866 | return false; | ||
1867 | } | ||
1868 | else { | ||
1869 | if(!read_subframe_lpc_(decoder, channel, bps, ((x>>1)&31)+1, do_full_decode)) | ||
1870 | return false; | ||
1871 | } | ||
1872 | |||
1873 | if(wasted_bits && do_full_decode) { | ||
1874 | unsigned i; | ||
1875 | x = decoder->private_->frame.subframes[channel].wasted_bits; | ||
1876 | for(i = 0; i < decoder->private_->frame.header.blocksize; i++) | ||
1877 | decoder->private_->output[channel][i] <<= x; | ||
1878 | } | ||
1879 | |||
1880 | return true; | ||
1881 | } | ||
1882 | |||
1883 | FLAC__bool read_subframe_constant_(FLAC__StreamDecoder *decoder, unsigned channel, unsigned bps, FLAC__bool do_full_decode) | ||
1884 | { | ||
1885 | FLAC__Subframe_Constant *subframe = &decoder->private_->frame.subframes[channel].data.constant; | ||
1886 | FLAC__int32 x; | ||
1887 | unsigned i; | ||
1888 | FLAC__int32 *output = decoder->private_->output[channel]; | ||
1889 | |||
1890 | decoder->private_->frame.subframes[channel].type = FLAC__SUBFRAME_TYPE_CONSTANT; | ||
1891 | |||
1892 | if(!FLAC__bitbuffer_read_raw_int32(decoder->private_->input, &x, bps, read_callback_, decoder)) | ||
1893 | return false; /* the read_callback_ sets the state for us */ | ||
1894 | |||
1895 | subframe->value = x; | ||
1896 | |||
1897 | /* decode the subframe */ | ||
1898 | if(do_full_decode) { | ||
1899 | for(i = 0; i < decoder->private_->frame.header.blocksize; i++) | ||
1900 | output[i] = x; | ||
1901 | } | ||
1902 | |||
1903 | return true; | ||
1904 | } | ||
1905 | |||
1906 | FLAC__bool read_subframe_fixed_(FLAC__StreamDecoder *decoder, unsigned channel, unsigned bps, const unsigned order, FLAC__bool do_full_decode) | ||
1907 | { | ||
1908 | FLAC__Subframe_Fixed *subframe = &decoder->private_->frame.subframes[channel].data.fixed; | ||
1909 | FLAC__int32 i32; | ||
1910 | FLAC__uint32 u32; | ||
1911 | unsigned u; | ||
1912 | |||
1913 | decoder->private_->frame.subframes[channel].type = FLAC__SUBFRAME_TYPE_FIXED; | ||
1914 | |||
1915 | subframe->residual = decoder->private_->residual[channel]; | ||
1916 | subframe->order = order; | ||
1917 | |||
1918 | /* read warm-up samples */ | ||
1919 | for(u = 0; u < order; u++) { | ||
1920 | if(!FLAC__bitbuffer_read_raw_int32(decoder->private_->input, &i32, bps, read_callback_, decoder)) | ||
1921 | return false; /* the read_callback_ sets the state for us */ | ||
1922 | subframe->warmup[u] = i32; | ||
1923 | } | ||
1924 | |||
1925 | /* read entropy coding method info */ | ||
1926 | if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &u32, FLAC__ENTROPY_CODING_METHOD_TYPE_LEN, read_callback_, decoder)) | ||
1927 | return false; /* the read_callback_ sets the state for us */ | ||
1928 | subframe->entropy_coding_method.type = (FLAC__EntropyCodingMethodType)u32; | ||
1929 | switch(subframe->entropy_coding_method.type) { | ||
1930 | case FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE: | ||
1931 | if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &u32, FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ORDER_LEN, read_callback_, decoder)) | ||
1932 | return false; /* the read_callback_ sets the state for us */ | ||
1933 | subframe->entropy_coding_method.data.partitioned_rice.order = u32; | ||
1934 | subframe->entropy_coding_method.data.partitioned_rice.contents = &decoder->private_->partitioned_rice_contents[channel]; | ||
1935 | break; | ||
1936 | default: | ||
1937 | decoder->protected_->state = FLAC__STREAM_DECODER_UNPARSEABLE_STREAM; | ||
1938 | return false; | ||
1939 | } | ||
1940 | |||
1941 | /* read residual */ | ||
1942 | switch(subframe->entropy_coding_method.type) { | ||
1943 | case FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE: | ||
1944 | 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])) | ||
1945 | return false; | ||
1946 | break; | ||
1947 | default: | ||
1948 | FLAC__ASSERT(0); | ||
1949 | } | ||
1950 | |||
1951 | /* decode the subframe */ | ||
1952 | if(do_full_decode) { | ||
1953 | memcpy(decoder->private_->output[channel], subframe->warmup, sizeof(FLAC__int32) * order); | ||
1954 | FLAC__fixed_restore_signal(decoder->private_->residual[channel], decoder->private_->frame.header.blocksize-order, order, decoder->private_->output[channel]+order); | ||
1955 | } | ||
1956 | |||
1957 | return true; | ||
1958 | } | ||
1959 | |||
1960 | FLAC__bool read_subframe_lpc_(FLAC__StreamDecoder *decoder, unsigned channel, unsigned bps, const unsigned order, FLAC__bool do_full_decode) | ||
1961 | { | ||
1962 | FLAC__Subframe_LPC *subframe = &decoder->private_->frame.subframes[channel].data.lpc; | ||
1963 | FLAC__int32 i32; | ||
1964 | FLAC__uint32 u32; | ||
1965 | unsigned u; | ||
1966 | |||
1967 | decoder->private_->frame.subframes[channel].type = FLAC__SUBFRAME_TYPE_LPC; | ||
1968 | |||
1969 | subframe->residual = decoder->private_->residual[channel]; | ||
1970 | subframe->order = order; | ||
1971 | |||
1972 | /* read warm-up samples */ | ||
1973 | for(u = 0; u < order; u++) { | ||
1974 | if(!FLAC__bitbuffer_read_raw_int32(decoder->private_->input, &i32, bps, read_callback_, decoder)) | ||
1975 | return false; /* the read_callback_ sets the state for us */ | ||
1976 | subframe->warmup[u] = i32; | ||
1977 | } | ||
1978 | |||
1979 | /* read qlp coeff precision */ | ||
1980 | if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &u32, FLAC__SUBFRAME_LPC_QLP_COEFF_PRECISION_LEN, read_callback_, decoder)) | ||
1981 | return false; /* the read_callback_ sets the state for us */ | ||
1982 | if(u32 == (1u << FLAC__SUBFRAME_LPC_QLP_COEFF_PRECISION_LEN) - 1) { | ||
1983 | decoder->private_->error_callback(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC, decoder->private_->client_data); | ||
1984 | decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC; | ||
1985 | return true; | ||
1986 | } | ||
1987 | subframe->qlp_coeff_precision = u32+1; | ||
1988 | |||
1989 | /* read qlp shift */ | ||
1990 | if(!FLAC__bitbuffer_read_raw_int32(decoder->private_->input, &i32, FLAC__SUBFRAME_LPC_QLP_SHIFT_LEN, read_callback_, decoder)) | ||
1991 | return false; /* the read_callback_ sets the state for us */ | ||
1992 | subframe->quantization_level = i32; | ||
1993 | |||
1994 | /* read quantized lp coefficiencts */ | ||
1995 | for(u = 0; u < order; u++) { | ||
1996 | if(!FLAC__bitbuffer_read_raw_int32(decoder->private_->input, &i32, subframe->qlp_coeff_precision, read_callback_, decoder)) | ||
1997 | return false; /* the read_callback_ sets the state for us */ | ||
1998 | subframe->qlp_coeff[u] = i32; | ||
1999 | } | ||
2000 | |||
2001 | /* read entropy coding method info */ | ||
2002 | if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &u32, FLAC__ENTROPY_CODING_METHOD_TYPE_LEN, read_callback_, decoder)) | ||
2003 | return false; /* the read_callback_ sets the state for us */ | ||
2004 | subframe->entropy_coding_method.type = (FLAC__EntropyCodingMethodType)u32; | ||
2005 | switch(subframe->entropy_coding_method.type) { | ||
2006 | case FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE: | ||
2007 | if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &u32, FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ORDER_LEN, read_callback_, decoder)) | ||
2008 | return false; /* the read_callback_ sets the state for us */ | ||
2009 | subframe->entropy_coding_method.data.partitioned_rice.order = u32; | ||
2010 | subframe->entropy_coding_method.data.partitioned_rice.contents = &decoder->private_->partitioned_rice_contents[channel]; | ||
2011 | break; | ||
2012 | default: | ||
2013 | decoder->protected_->state = FLAC__STREAM_DECODER_UNPARSEABLE_STREAM; | ||
2014 | return false; | ||
2015 | } | ||
2016 | |||
2017 | /* read residual */ | ||
2018 | switch(subframe->entropy_coding_method.type) { | ||
2019 | case FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE: | ||
2020 | 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])) | ||
2021 | return false; | ||
2022 | break; | ||
2023 | default: | ||
2024 | FLAC__ASSERT(0); | ||
2025 | } | ||
2026 | |||
2027 | /* decode the subframe */ | ||
2028 | if(do_full_decode) { | ||
2029 | memcpy(decoder->private_->output[channel], subframe->warmup, sizeof(FLAC__int32) * order); | ||
2030 | if(bps + subframe->qlp_coeff_precision + FLAC__bitmath_ilog2(order) <= 32) | ||
2031 | if(bps <= 16 && subframe->qlp_coeff_precision <= 16) { | ||
2032 | if(order <= 8) | ||
2033 | 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); | ||
2034 | else | ||
2035 | 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); | ||
2036 | } | ||
2037 | else | ||
2038 | 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); | ||
2039 | else | ||
2040 | 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); | ||
2041 | } | ||
2042 | |||
2043 | return true; | ||
2044 | } | ||
2045 | |||
2046 | FLAC__bool read_subframe_verbatim_(FLAC__StreamDecoder *decoder, unsigned channel, unsigned bps, FLAC__bool do_full_decode) | ||
2047 | { | ||
2048 | FLAC__Subframe_Verbatim *subframe = &decoder->private_->frame.subframes[channel].data.verbatim; | ||
2049 | FLAC__int32 x, *residual = decoder->private_->residual[channel]; | ||
2050 | unsigned i; | ||
2051 | |||
2052 | decoder->private_->frame.subframes[channel].type = FLAC__SUBFRAME_TYPE_VERBATIM; | ||
2053 | |||
2054 | subframe->data = residual; | ||
2055 | |||
2056 | for(i = 0; i < decoder->private_->frame.header.blocksize; i++) { | ||
2057 | if(!FLAC__bitbuffer_read_raw_int32(decoder->private_->input, &x, bps, read_callback_, decoder)) | ||
2058 | return false; /* the read_callback_ sets the state for us */ | ||
2059 | residual[i] = x; | ||
2060 | } | ||
2061 | |||
2062 | /* decode the subframe */ | ||
2063 | if(do_full_decode) | ||
2064 | memcpy(decoder->private_->output[channel], subframe->data, sizeof(FLAC__int32) * decoder->private_->frame.header.blocksize); | ||
2065 | |||
2066 | return true; | ||
2067 | } | ||
2068 | |||
2069 | FLAC__bool read_residual_partitioned_rice_(FLAC__StreamDecoder *decoder, unsigned predictor_order, unsigned partition_order, FLAC__EntropyCodingMethod_PartitionedRiceContents *partitioned_rice_contents, FLAC__int32 *residual) | ||
2070 | { | ||
2071 | FLAC__uint32 rice_parameter; | ||
2072 | int i; | ||
2073 | unsigned partition, sample, u; | ||
2074 | const unsigned partitions = 1u << partition_order; | ||
2075 | const unsigned partition_samples = partition_order > 0? decoder->private_->frame.header.blocksize >> partition_order : decoder->private_->frame.header.blocksize - predictor_order; | ||
2076 | |||
2077 | /* sanity checks */ | ||
2078 | if(partition_order == 0) { | ||
2079 | if(decoder->private_->frame.header.blocksize < predictor_order) { | ||
2080 | decoder->private_->error_callback(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC, decoder->private_->client_data); | ||
2081 | decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC; | ||
2082 | return true; | ||
2083 | } | ||
2084 | } | ||
2085 | else { | ||
2086 | if(partition_samples < predictor_order) { | ||
2087 | decoder->private_->error_callback(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC, decoder->private_->client_data); | ||
2088 | decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC; | ||
2089 | return true; | ||
2090 | } | ||
2091 | } | ||
2092 | |||
2093 | if(!FLAC__format_entropy_coding_method_partitioned_rice_contents_ensure_size(partitioned_rice_contents, max(6, partition_order))) { | ||
2094 | decoder->protected_->state = FLAC__STREAM_DECODER_MEMORY_ALLOCATION_ERROR; | ||
2095 | return false; | ||
2096 | } | ||
2097 | |||
2098 | sample = 0; | ||
2099 | for(partition = 0; partition < partitions; partition++) { | ||
2100 | if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &rice_parameter, FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_PARAMETER_LEN, read_callback_, decoder)) | ||
2101 | return false; /* the read_callback_ sets the state for us */ | ||
2102 | partitioned_rice_contents->parameters[partition] = rice_parameter; | ||
2103 | if(rice_parameter < FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER) { | ||
2104 | #ifdef FLAC__SYMMETRIC_RICE | ||
2105 | for(u = (partition_order == 0 || partition > 0)? 0 : predictor_order; u < partition_samples; u++, sample++) { | ||
2106 | if(!FLAC__bitbuffer_read_symmetric_rice_signed(decoder->private_->input, &i, rice_parameter, read_callback_, decoder)) | ||
2107 | return false; /* the read_callback_ sets the state for us */ | ||
2108 | residual[sample] = i; | ||
2109 | } | ||
2110 | #else | ||
2111 | u = (partition_order == 0 || partition > 0)? partition_samples : partition_samples - predictor_order; | ||
2112 | if(!FLAC__bitbuffer_read_rice_signed_block(decoder->private_->input, residual + sample, u, rice_parameter, read_callback_, decoder)) | ||
2113 | return false; /* the read_callback_ sets the state for us */ | ||
2114 | sample += u; | ||
2115 | #endif | ||
2116 | } | ||
2117 | else { | ||
2118 | if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &rice_parameter, FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_RAW_LEN, read_callback_, decoder)) | ||
2119 | return false; /* the read_callback_ sets the state for us */ | ||
2120 | partitioned_rice_contents->raw_bits[partition] = rice_parameter; | ||
2121 | for(u = (partition_order == 0 || partition > 0)? 0 : predictor_order; u < partition_samples; u++, sample++) { | ||
2122 | if(!FLAC__bitbuffer_read_raw_int32(decoder->private_->input, &i, rice_parameter, read_callback_, decoder)) | ||
2123 | return false; /* the read_callback_ sets the state for us */ | ||
2124 | residual[sample] = i; | ||
2125 | } | ||
2126 | } | ||
2127 | } | ||
2128 | |||
2129 | return true; | ||
2130 | } | ||
2131 | |||
2132 | FLAC__bool read_zero_padding_(FLAC__StreamDecoder *decoder) | ||
2133 | { | ||
2134 | if(!FLAC__bitbuffer_is_consumed_byte_aligned(decoder->private_->input)) { | ||
2135 | FLAC__uint32 zero = 0; | ||
2136 | if(!FLAC__bitbuffer_read_raw_uint32(decoder->private_->input, &zero, FLAC__bitbuffer_bits_left_for_byte_alignment(decoder->private_->input), read_callback_, decoder)) | ||
2137 | return false; /* the read_callback_ sets the state for us */ | ||
2138 | if(zero != 0) { | ||
2139 | decoder->private_->error_callback(decoder, FLAC__STREAM_DECODER_ERROR_STATUS_LOST_SYNC, decoder->private_->client_data); | ||
2140 | decoder->protected_->state = FLAC__STREAM_DECODER_SEARCH_FOR_FRAME_SYNC; | ||
2141 | } | ||
2142 | } | ||
2143 | return true; | ||
2144 | } | ||
2145 | |||
2146 | FLAC__bool read_callback_(FLAC__byte buffer[], unsigned *bytes, void *client_data) | ||
2147 | { | ||
2148 | FLAC__StreamDecoder *decoder = (FLAC__StreamDecoder *)client_data; | ||
2149 | FLAC__StreamDecoderReadStatus status; | ||
2150 | |||
2151 | status = decoder->private_->read_callback(decoder, buffer, bytes, decoder->private_->client_data); | ||
2152 | if(status == FLAC__STREAM_DECODER_READ_STATUS_END_OF_STREAM) | ||
2153 | decoder->protected_->state = FLAC__STREAM_DECODER_END_OF_STREAM; | ||
2154 | else if(status == FLAC__STREAM_DECODER_READ_STATUS_ABORT) | ||
2155 | decoder->protected_->state = FLAC__STREAM_DECODER_ABORTED; | ||
2156 | return status == FLAC__STREAM_DECODER_READ_STATUS_CONTINUE; | ||
2157 | } | ||