diff options
Diffstat (limited to 'apps/codecs/libFLAC/format.c')
-rw-r--r-- | apps/codecs/libFLAC/format.c | 474 |
1 files changed, 474 insertions, 0 deletions
diff --git a/apps/codecs/libFLAC/format.c b/apps/codecs/libFLAC/format.c new file mode 100644 index 0000000000..25ec7d98b6 --- /dev/null +++ b/apps/codecs/libFLAC/format.c | |||
@@ -0,0 +1,474 @@ | |||
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 qsort() */ | ||
34 | #include "FLAC/assert.h" | ||
35 | #include "FLAC/format.h" | ||
36 | #include "private/format.h" | ||
37 | |||
38 | #ifdef HAVE_CONFIG_H | ||
39 | #include <config.h> | ||
40 | #endif | ||
41 | |||
42 | #ifdef min | ||
43 | #undef min | ||
44 | #endif | ||
45 | #define min(a,b) ((a)<(b)?(a):(b)) | ||
46 | |||
47 | /* adjust for compilers that can't understand using LLU suffix for uint64_t literals */ | ||
48 | #ifdef _MSC_VER | ||
49 | #define FLAC__U64L(x) x | ||
50 | #else | ||
51 | #define FLAC__U64L(x) x##LLU | ||
52 | #endif | ||
53 | |||
54 | /* VERSION should come from configure */ | ||
55 | FLAC_API const char *FLAC__VERSION_STRING = VERSION; | ||
56 | |||
57 | #if defined _MSC_VER || defined __MINW32__ | ||
58 | /* yet one more hack because of MSVC6: */ | ||
59 | FLAC_API const char *FLAC__VENDOR_STRING = "reference libFLAC 1.1.2 20050205"; | ||
60 | #else | ||
61 | FLAC_API const char *FLAC__VENDOR_STRING = "reference libFLAC " VERSION " 20050205"; | ||
62 | #endif | ||
63 | |||
64 | FLAC_API const FLAC__byte FLAC__STREAM_SYNC_STRING[4] = { 'f','L','a','C' }; | ||
65 | FLAC_API const unsigned FLAC__STREAM_SYNC = 0x664C6143; | ||
66 | FLAC_API const unsigned FLAC__STREAM_SYNC_LEN = 32; /* bits */; | ||
67 | |||
68 | FLAC_API const unsigned FLAC__STREAM_METADATA_STREAMINFO_MIN_BLOCK_SIZE_LEN = 16; /* bits */ | ||
69 | FLAC_API const unsigned FLAC__STREAM_METADATA_STREAMINFO_MAX_BLOCK_SIZE_LEN = 16; /* bits */ | ||
70 | FLAC_API const unsigned FLAC__STREAM_METADATA_STREAMINFO_MIN_FRAME_SIZE_LEN = 24; /* bits */ | ||
71 | FLAC_API const unsigned FLAC__STREAM_METADATA_STREAMINFO_MAX_FRAME_SIZE_LEN = 24; /* bits */ | ||
72 | FLAC_API const unsigned FLAC__STREAM_METADATA_STREAMINFO_SAMPLE_RATE_LEN = 20; /* bits */ | ||
73 | FLAC_API const unsigned FLAC__STREAM_METADATA_STREAMINFO_CHANNELS_LEN = 3; /* bits */ | ||
74 | FLAC_API const unsigned FLAC__STREAM_METADATA_STREAMINFO_BITS_PER_SAMPLE_LEN = 5; /* bits */ | ||
75 | FLAC_API const unsigned FLAC__STREAM_METADATA_STREAMINFO_TOTAL_SAMPLES_LEN = 36; /* bits */ | ||
76 | FLAC_API const unsigned FLAC__STREAM_METADATA_STREAMINFO_MD5SUM_LEN = 128; /* bits */ | ||
77 | |||
78 | FLAC_API const unsigned FLAC__STREAM_METADATA_APPLICATION_ID_LEN = 32; /* bits */ | ||
79 | |||
80 | FLAC_API const unsigned FLAC__STREAM_METADATA_SEEKPOINT_SAMPLE_NUMBER_LEN = 64; /* bits */ | ||
81 | FLAC_API const unsigned FLAC__STREAM_METADATA_SEEKPOINT_STREAM_OFFSET_LEN = 64; /* bits */ | ||
82 | FLAC_API const unsigned FLAC__STREAM_METADATA_SEEKPOINT_FRAME_SAMPLES_LEN = 16; /* bits */ | ||
83 | |||
84 | FLAC_API const FLAC__uint64 FLAC__STREAM_METADATA_SEEKPOINT_PLACEHOLDER = FLAC__U64L(0xffffffffffffffff); | ||
85 | |||
86 | FLAC_API const unsigned FLAC__STREAM_METADATA_VORBIS_COMMENT_ENTRY_LENGTH_LEN = 32; /* bits */ | ||
87 | FLAC_API const unsigned FLAC__STREAM_METADATA_VORBIS_COMMENT_NUM_COMMENTS_LEN = 32; /* bits */ | ||
88 | |||
89 | FLAC_API const unsigned FLAC__STREAM_METADATA_CUESHEET_INDEX_OFFSET_LEN = 64; /* bits */ | ||
90 | FLAC_API const unsigned FLAC__STREAM_METADATA_CUESHEET_INDEX_NUMBER_LEN = 8; /* bits */ | ||
91 | FLAC_API const unsigned FLAC__STREAM_METADATA_CUESHEET_INDEX_RESERVED_LEN = 3*8; /* bits */ | ||
92 | |||
93 | FLAC_API const unsigned FLAC__STREAM_METADATA_CUESHEET_TRACK_OFFSET_LEN = 64; /* bits */ | ||
94 | FLAC_API const unsigned FLAC__STREAM_METADATA_CUESHEET_TRACK_NUMBER_LEN = 8; /* bits */ | ||
95 | FLAC_API const unsigned FLAC__STREAM_METADATA_CUESHEET_TRACK_ISRC_LEN = 12*8; /* bits */ | ||
96 | FLAC_API const unsigned FLAC__STREAM_METADATA_CUESHEET_TRACK_TYPE_LEN = 1; /* bit */ | ||
97 | FLAC_API const unsigned FLAC__STREAM_METADATA_CUESHEET_TRACK_PRE_EMPHASIS_LEN = 1; /* bit */ | ||
98 | FLAC_API const unsigned FLAC__STREAM_METADATA_CUESHEET_TRACK_RESERVED_LEN = 6+13*8; /* bits */ | ||
99 | FLAC_API const unsigned FLAC__STREAM_METADATA_CUESHEET_TRACK_NUM_INDICES_LEN = 8; /* bits */ | ||
100 | |||
101 | FLAC_API const unsigned FLAC__STREAM_METADATA_CUESHEET_MEDIA_CATALOG_NUMBER_LEN = 128*8; /* bits */ | ||
102 | FLAC_API const unsigned FLAC__STREAM_METADATA_CUESHEET_LEAD_IN_LEN = 64; /* bits */ | ||
103 | FLAC_API const unsigned FLAC__STREAM_METADATA_CUESHEET_IS_CD_LEN = 1; /* bit */ | ||
104 | FLAC_API const unsigned FLAC__STREAM_METADATA_CUESHEET_RESERVED_LEN = 7+258*8; /* bits */ | ||
105 | FLAC_API const unsigned FLAC__STREAM_METADATA_CUESHEET_NUM_TRACKS_LEN = 8; /* bits */ | ||
106 | |||
107 | FLAC_API const unsigned FLAC__STREAM_METADATA_IS_LAST_LEN = 1; /* bits */ | ||
108 | FLAC_API const unsigned FLAC__STREAM_METADATA_TYPE_LEN = 7; /* bits */ | ||
109 | FLAC_API const unsigned FLAC__STREAM_METADATA_LENGTH_LEN = 24; /* bits */ | ||
110 | |||
111 | FLAC_API const unsigned FLAC__FRAME_HEADER_SYNC = 0x3ffe; | ||
112 | FLAC_API const unsigned FLAC__FRAME_HEADER_SYNC_LEN = 14; /* bits */ | ||
113 | FLAC_API const unsigned FLAC__FRAME_HEADER_RESERVED_LEN = 2; /* bits */ | ||
114 | FLAC_API const unsigned FLAC__FRAME_HEADER_BLOCK_SIZE_LEN = 4; /* bits */ | ||
115 | FLAC_API const unsigned FLAC__FRAME_HEADER_SAMPLE_RATE_LEN = 4; /* bits */ | ||
116 | FLAC_API const unsigned FLAC__FRAME_HEADER_CHANNEL_ASSIGNMENT_LEN = 4; /* bits */ | ||
117 | FLAC_API const unsigned FLAC__FRAME_HEADER_BITS_PER_SAMPLE_LEN = 3; /* bits */ | ||
118 | FLAC_API const unsigned FLAC__FRAME_HEADER_ZERO_PAD_LEN = 1; /* bits */ | ||
119 | FLAC_API const unsigned FLAC__FRAME_HEADER_CRC_LEN = 8; /* bits */ | ||
120 | |||
121 | FLAC_API const unsigned FLAC__FRAME_FOOTER_CRC_LEN = 16; /* bits */ | ||
122 | |||
123 | FLAC_API const unsigned FLAC__ENTROPY_CODING_METHOD_TYPE_LEN = 2; /* bits */ | ||
124 | FLAC_API const unsigned FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ORDER_LEN = 4; /* bits */ | ||
125 | FLAC_API const unsigned FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_PARAMETER_LEN = 4; /* bits */ | ||
126 | FLAC_API const unsigned FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_RAW_LEN = 5; /* bits */ | ||
127 | |||
128 | FLAC_API const unsigned FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_ESCAPE_PARAMETER = 15; /* == (1<<FLAC__ENTROPY_CODING_METHOD_PARTITIONED_RICE_PARAMETER_LEN)-1 */ | ||
129 | |||
130 | FLAC_API const char * const FLAC__EntropyCodingMethodTypeString[] = { | ||
131 | "PARTITIONED_RICE" | ||
132 | }; | ||
133 | |||
134 | FLAC_API const unsigned FLAC__SUBFRAME_LPC_QLP_COEFF_PRECISION_LEN = 4; /* bits */ | ||
135 | FLAC_API const unsigned FLAC__SUBFRAME_LPC_QLP_SHIFT_LEN = 5; /* bits */ | ||
136 | |||
137 | FLAC_API const unsigned FLAC__SUBFRAME_ZERO_PAD_LEN = 1; /* bits */ | ||
138 | FLAC_API const unsigned FLAC__SUBFRAME_TYPE_LEN = 6; /* bits */ | ||
139 | FLAC_API const unsigned FLAC__SUBFRAME_WASTED_BITS_FLAG_LEN = 1; /* bits */ | ||
140 | |||
141 | FLAC_API const unsigned FLAC__SUBFRAME_TYPE_CONSTANT_BYTE_ALIGNED_MASK = 0x00; | ||
142 | FLAC_API const unsigned FLAC__SUBFRAME_TYPE_VERBATIM_BYTE_ALIGNED_MASK = 0x02; | ||
143 | FLAC_API const unsigned FLAC__SUBFRAME_TYPE_FIXED_BYTE_ALIGNED_MASK = 0x10; | ||
144 | FLAC_API const unsigned FLAC__SUBFRAME_TYPE_LPC_BYTE_ALIGNED_MASK = 0x40; | ||
145 | |||
146 | FLAC_API const char * const FLAC__SubframeTypeString[] = { | ||
147 | "CONSTANT", | ||
148 | "VERBATIM", | ||
149 | "FIXED", | ||
150 | "LPC" | ||
151 | }; | ||
152 | |||
153 | FLAC_API const char * const FLAC__ChannelAssignmentString[] = { | ||
154 | "INDEPENDENT", | ||
155 | "LEFT_SIDE", | ||
156 | "RIGHT_SIDE", | ||
157 | "MID_SIDE" | ||
158 | }; | ||
159 | |||
160 | FLAC_API const char * const FLAC__FrameNumberTypeString[] = { | ||
161 | "FRAME_NUMBER_TYPE_FRAME_NUMBER", | ||
162 | "FRAME_NUMBER_TYPE_SAMPLE_NUMBER" | ||
163 | }; | ||
164 | |||
165 | FLAC_API const char * const FLAC__MetadataTypeString[] = { | ||
166 | "STREAMINFO", | ||
167 | "PADDING", | ||
168 | "APPLICATION", | ||
169 | "SEEKTABLE", | ||
170 | "VORBIS_COMMENT", | ||
171 | "CUESHEET" | ||
172 | }; | ||
173 | |||
174 | FLAC_API FLAC__bool FLAC__format_sample_rate_is_valid(unsigned sample_rate) | ||
175 | { | ||
176 | if( | ||
177 | sample_rate == 0 || | ||
178 | sample_rate > FLAC__MAX_SAMPLE_RATE || | ||
179 | ( | ||
180 | sample_rate >= (1u << 16) && | ||
181 | !(sample_rate % 1000 == 0 || sample_rate % 10 == 0) | ||
182 | ) | ||
183 | ) { | ||
184 | return false; | ||
185 | } | ||
186 | else | ||
187 | return true; | ||
188 | } | ||
189 | |||
190 | FLAC_API FLAC__bool FLAC__format_seektable_is_legal(const FLAC__StreamMetadata_SeekTable *seek_table) | ||
191 | { | ||
192 | unsigned i; | ||
193 | FLAC__uint64 prev_sample_number = 0; | ||
194 | FLAC__bool got_prev = false; | ||
195 | |||
196 | FLAC__ASSERT(0 != seek_table); | ||
197 | |||
198 | for(i = 0; i < seek_table->num_points; i++) { | ||
199 | if(got_prev) { | ||
200 | if( | ||
201 | seek_table->points[i].sample_number != FLAC__STREAM_METADATA_SEEKPOINT_PLACEHOLDER && | ||
202 | seek_table->points[i].sample_number <= prev_sample_number | ||
203 | ) | ||
204 | return false; | ||
205 | } | ||
206 | prev_sample_number = seek_table->points[i].sample_number; | ||
207 | got_prev = true; | ||
208 | } | ||
209 | |||
210 | return true; | ||
211 | } | ||
212 | |||
213 | /* used as the sort predicate for qsort() */ | ||
214 | static int seekpoint_compare_(const FLAC__StreamMetadata_SeekPoint *l, const FLAC__StreamMetadata_SeekPoint *r) | ||
215 | { | ||
216 | /* we don't just 'return l->sample_number - r->sample_number' since the result (FLAC__int64) might overflow an 'int' */ | ||
217 | if(l->sample_number == r->sample_number) | ||
218 | return 0; | ||
219 | else if(l->sample_number < r->sample_number) | ||
220 | return -1; | ||
221 | else | ||
222 | return 1; | ||
223 | } | ||
224 | |||
225 | FLAC_API unsigned FLAC__format_seektable_sort(FLAC__StreamMetadata_SeekTable *seek_table) | ||
226 | { | ||
227 | unsigned i, j; | ||
228 | FLAC__bool first; | ||
229 | |||
230 | FLAC__ASSERT(0 != seek_table); | ||
231 | |||
232 | /* sort the seekpoints */ | ||
233 | qsort(seek_table->points, seek_table->num_points, sizeof(FLAC__StreamMetadata_SeekPoint), (int (*)(const void *, const void *))seekpoint_compare_); | ||
234 | |||
235 | /* uniquify the seekpoints */ | ||
236 | first = true; | ||
237 | for(i = j = 0; i < seek_table->num_points; i++) { | ||
238 | if(seek_table->points[i].sample_number != FLAC__STREAM_METADATA_SEEKPOINT_PLACEHOLDER) { | ||
239 | if(!first) { | ||
240 | if(seek_table->points[i].sample_number == seek_table->points[j-1].sample_number) | ||
241 | continue; | ||
242 | } | ||
243 | } | ||
244 | first = false; | ||
245 | seek_table->points[j++] = seek_table->points[i]; | ||
246 | } | ||
247 | |||
248 | for(i = j; i < seek_table->num_points; i++) { | ||
249 | seek_table->points[i].sample_number = FLAC__STREAM_METADATA_SEEKPOINT_PLACEHOLDER; | ||
250 | seek_table->points[i].stream_offset = 0; | ||
251 | seek_table->points[i].frame_samples = 0; | ||
252 | } | ||
253 | |||
254 | return j; | ||
255 | } | ||
256 | |||
257 | static __inline unsigned utf8len_(const FLAC__byte *utf8) | ||
258 | { | ||
259 | FLAC__ASSERT(0 != utf8); | ||
260 | if ((utf8[0] & 0x80) == 0) | ||
261 | return 1; | ||
262 | else if ((utf8[0] & 0xE0) == 0xC0 && (utf8[1] & 0xC0) == 0x80) | ||
263 | return 2; | ||
264 | else if ((utf8[0] & 0xF0) == 0xE0 && (utf8[1] & 0xC0) == 0x80 && (utf8[2] & 0xC0) == 0x80) | ||
265 | return 3; | ||
266 | else | ||
267 | return 0; | ||
268 | } | ||
269 | |||
270 | FLAC_API FLAC__bool FLAC__format_vorbiscomment_entry_name_is_legal(const char *name) | ||
271 | { | ||
272 | char c; | ||
273 | for(c = *name; c; c = *(++name)) | ||
274 | if(c < 0x20 || c == 0x3d || c > 0x7d) | ||
275 | return false; | ||
276 | return true; | ||
277 | } | ||
278 | |||
279 | FLAC_API FLAC__bool FLAC__format_vorbiscomment_entry_value_is_legal(const FLAC__byte *value, unsigned length) | ||
280 | { | ||
281 | if(length == (unsigned)(-1)) { | ||
282 | while(*value) { | ||
283 | unsigned n = utf8len_(value); | ||
284 | if(n == 0) | ||
285 | return false; | ||
286 | value += n; | ||
287 | } | ||
288 | } | ||
289 | else { | ||
290 | const FLAC__byte *end = value + length; | ||
291 | while(value < end) { | ||
292 | unsigned n = utf8len_(value); | ||
293 | if(n == 0) | ||
294 | return false; | ||
295 | value += n; | ||
296 | } | ||
297 | if(value != end) | ||
298 | return false; | ||
299 | } | ||
300 | return true; | ||
301 | } | ||
302 | |||
303 | FLAC_API FLAC__bool FLAC__format_vorbiscomment_entry_is_legal(const FLAC__byte *entry, unsigned length) | ||
304 | { | ||
305 | const FLAC__byte *s, *end; | ||
306 | |||
307 | for(s = entry, end = s + length; s < end && *s != '='; s++) { | ||
308 | if(*s < 0x20 || *s > 0x7D) | ||
309 | return false; | ||
310 | } | ||
311 | if(s == end) | ||
312 | return false; | ||
313 | |||
314 | s++; /* skip '=' */ | ||
315 | |||
316 | while(s < end) { | ||
317 | unsigned n = utf8len_(s); | ||
318 | if(n == 0) | ||
319 | return false; | ||
320 | s += n; | ||
321 | } | ||
322 | if(s != end) | ||
323 | return false; | ||
324 | |||
325 | return true; | ||
326 | } | ||
327 | |||
328 | FLAC_API FLAC__bool FLAC__format_cuesheet_is_legal(const FLAC__StreamMetadata_CueSheet *cue_sheet, FLAC__bool check_cd_da_subset, const char **violation) | ||
329 | { | ||
330 | unsigned i, j; | ||
331 | |||
332 | if(check_cd_da_subset) { | ||
333 | if(cue_sheet->lead_in < 2 * 44100) { | ||
334 | if(violation) *violation = "CD-DA cue sheet must have a lead-in length of at least 2 seconds"; | ||
335 | return false; | ||
336 | } | ||
337 | if(cue_sheet->lead_in % 588 != 0) { | ||
338 | if(violation) *violation = "CD-DA cue sheet lead-in length must be evenly divisible by 588 samples"; | ||
339 | return false; | ||
340 | } | ||
341 | } | ||
342 | |||
343 | if(cue_sheet->num_tracks == 0) { | ||
344 | if(violation) *violation = "cue sheet must have at least one track (the lead-out)"; | ||
345 | return false; | ||
346 | } | ||
347 | |||
348 | if(check_cd_da_subset && cue_sheet->tracks[cue_sheet->num_tracks-1].number != 170) { | ||
349 | if(violation) *violation = "CD-DA cue sheet must have a lead-out track number 170 (0xAA)"; | ||
350 | return false; | ||
351 | } | ||
352 | |||
353 | for(i = 0; i < cue_sheet->num_tracks; i++) { | ||
354 | if(cue_sheet->tracks[i].number == 0) { | ||
355 | if(violation) *violation = "cue sheet may not have a track number 0"; | ||
356 | return false; | ||
357 | } | ||
358 | |||
359 | if(check_cd_da_subset) { | ||
360 | if(!((cue_sheet->tracks[i].number >= 1 && cue_sheet->tracks[i].number <= 99) || cue_sheet->tracks[i].number == 170)) { | ||
361 | if(violation) *violation = "CD-DA cue sheet track number must be 1-99 or 170"; | ||
362 | return false; | ||
363 | } | ||
364 | } | ||
365 | |||
366 | if(check_cd_da_subset && cue_sheet->tracks[i].offset % 588 != 0) { | ||
367 | if(violation) *violation = "CD-DA cue sheet track offset must be evenly divisible by 588 samples"; | ||
368 | return false; | ||
369 | } | ||
370 | |||
371 | if(i < cue_sheet->num_tracks - 1) { | ||
372 | if(cue_sheet->tracks[i].num_indices == 0) { | ||
373 | if(violation) *violation = "cue sheet track must have at least one index point"; | ||
374 | return false; | ||
375 | } | ||
376 | |||
377 | if(cue_sheet->tracks[i].indices[0].number > 1) { | ||
378 | if(violation) *violation = "cue sheet track's first index number must be 0 or 1"; | ||
379 | return false; | ||
380 | } | ||
381 | } | ||
382 | |||
383 | for(j = 0; j < cue_sheet->tracks[i].num_indices; j++) { | ||
384 | if(check_cd_da_subset && cue_sheet->tracks[i].indices[j].offset % 588 != 0) { | ||
385 | if(violation) *violation = "CD-DA cue sheet track index offset must be evenly divisible by 588 samples"; | ||
386 | return false; | ||
387 | } | ||
388 | |||
389 | if(j > 0) { | ||
390 | if(cue_sheet->tracks[i].indices[j].number != cue_sheet->tracks[i].indices[j-1].number + 1) { | ||
391 | if(violation) *violation = "cue sheet track index numbers must increase by 1"; | ||
392 | return false; | ||
393 | } | ||
394 | } | ||
395 | } | ||
396 | } | ||
397 | |||
398 | return true; | ||
399 | } | ||
400 | |||
401 | /* | ||
402 | * These routines are private to libFLAC | ||
403 | */ | ||
404 | unsigned FLAC__format_get_max_rice_partition_order(unsigned blocksize, unsigned predictor_order) | ||
405 | { | ||
406 | return | ||
407 | FLAC__format_get_max_rice_partition_order_from_blocksize_limited_max_and_predictor_order( | ||
408 | FLAC__format_get_max_rice_partition_order_from_blocksize(blocksize), | ||
409 | blocksize, | ||
410 | predictor_order | ||
411 | ); | ||
412 | } | ||
413 | |||
414 | unsigned FLAC__format_get_max_rice_partition_order_from_blocksize(unsigned blocksize) | ||
415 | { | ||
416 | unsigned max_rice_partition_order = 0; | ||
417 | while(!(blocksize & 1)) { | ||
418 | max_rice_partition_order++; | ||
419 | blocksize >>= 1; | ||
420 | } | ||
421 | return min(FLAC__MAX_RICE_PARTITION_ORDER, max_rice_partition_order); | ||
422 | } | ||
423 | |||
424 | unsigned FLAC__format_get_max_rice_partition_order_from_blocksize_limited_max_and_predictor_order(unsigned limit, unsigned blocksize, unsigned predictor_order) | ||
425 | { | ||
426 | unsigned max_rice_partition_order = limit; | ||
427 | |||
428 | while(max_rice_partition_order > 0 && (blocksize >> max_rice_partition_order) <= predictor_order) | ||
429 | max_rice_partition_order--; | ||
430 | |||
431 | FLAC__ASSERT( | ||
432 | (max_rice_partition_order == 0 && blocksize >= predictor_order) || | ||
433 | (max_rice_partition_order > 0 && blocksize >> max_rice_partition_order > predictor_order) | ||
434 | ); | ||
435 | |||
436 | return max_rice_partition_order; | ||
437 | } | ||
438 | |||
439 | void FLAC__format_entropy_coding_method_partitioned_rice_contents_init(FLAC__EntropyCodingMethod_PartitionedRiceContents *object) | ||
440 | { | ||
441 | FLAC__ASSERT(0 != object); | ||
442 | |||
443 | object->parameters = 0; | ||
444 | object->raw_bits = 0; | ||
445 | object->capacity_by_order = 0; | ||
446 | } | ||
447 | |||
448 | void FLAC__format_entropy_coding_method_partitioned_rice_contents_clear(FLAC__EntropyCodingMethod_PartitionedRiceContents *object) | ||
449 | { | ||
450 | FLAC__ASSERT(0 != object); | ||
451 | |||
452 | if(0 != object->parameters) | ||
453 | free(object->parameters); | ||
454 | if(0 != object->raw_bits) | ||
455 | free(object->raw_bits); | ||
456 | FLAC__format_entropy_coding_method_partitioned_rice_contents_init(object); | ||
457 | } | ||
458 | |||
459 | FLAC__bool FLAC__format_entropy_coding_method_partitioned_rice_contents_ensure_size(FLAC__EntropyCodingMethod_PartitionedRiceContents *object, unsigned max_partition_order) | ||
460 | { | ||
461 | FLAC__ASSERT(0 != object); | ||
462 | |||
463 | FLAC__ASSERT(object->capacity_by_order > 0 || (0 == object->parameters && 0 == object->raw_bits)); | ||
464 | |||
465 | if(object->capacity_by_order < max_partition_order) { | ||
466 | if(0 == (object->parameters = (unsigned*)realloc(object->parameters, sizeof(unsigned)*(1 << max_partition_order)))) | ||
467 | return false; | ||
468 | if(0 == (object->raw_bits = (unsigned*)realloc(object->raw_bits, sizeof(unsigned)*(1 << max_partition_order)))) | ||
469 | return false; | ||
470 | object->capacity_by_order = max_partition_order; | ||
471 | } | ||
472 | |||
473 | return true; | ||
474 | } | ||