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Update V8 to version 4.7.42.
[chromium-blink-merge.git] / media / filters / vp8_parser.cc
blob5b49673d86e88b42450f4e849c608bf6c844e95a
1 // Copyright 2015 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4 //
5 // This file contains an implementation of a VP8 raw stream parser,
6 // as defined in RFC 6386.
7
8 #include "base/logging.h"
9 #include "media/filters/vp8_parser.h"
10
11 namespace media {
12
13 #define ERROR_RETURN(what) \
14 do { \
15 DVLOG(1) << "Error while trying to read " #what; \
16 return false; \
17 } while (0)
18
19 #define BD_READ_BOOL_OR_RETURN(out) \
20 do { \
21 if (!bd_.ReadBool(out)) \
22 ERROR_RETURN(out); \
23 } while (0)
24
25 #define BD_READ_BOOL_WITH_PROB_OR_RETURN(out, prob) \
26 do { \
27 if (!bd_.ReadBool(out, prob)) \
28 ERROR_RETURN(out); \
29 } while (0)
30
31 #define BD_READ_UNSIGNED_OR_RETURN(num_bits, out) \
32 do { \
33 int _out; \
34 if (!bd_.ReadLiteral(num_bits, &_out)) \
35 ERROR_RETURN(out); \
36 *out = _out; \
37 } while (0)
38
39 #define BD_READ_SIGNED_OR_RETURN(num_bits, out) \
40 do { \
41 int _out; \
42 if (!bd_.ReadLiteralWithSign(num_bits, &_out)) \
43 ERROR_RETURN(out); \
44 *out = _out; \
45 } while (0)
46
47 Vp8FrameHeader::Vp8FrameHeader() {
48 memset(this, 0, sizeof(*this));
49 }
50
51 Vp8Parser::Vp8Parser() : stream_(nullptr), bytes_left_(0) {
52 }
53
54 Vp8Parser::~Vp8Parser() {
55 }
56
57 bool Vp8Parser::ParseFrame(const uint8_t* ptr,
58 size_t frame_size,
59 Vp8FrameHeader* fhdr) {
60 stream_ = ptr;
61 bytes_left_ = frame_size;
62
63 memset(fhdr, 0, sizeof(*fhdr));
64 fhdr->data = stream_;
65 fhdr->frame_size = bytes_left_;
66
67 if (!ParseFrameTag(fhdr))
68 return false;
69
70 fhdr->first_part_offset = stream_ - fhdr->data;
71
72 if (!ParseFrameHeader(fhdr))
73 return false;
74
75 if (!ParsePartitions(fhdr))
76 return false;
77
78 DVLOG(4) << "Frame parsed, start: " << static_cast<const void*>(ptr)
79 << ", size: " << frame_size
80 << ", offsets: to first_part=" << fhdr->first_part_offset
81 << ", to macroblock data (in bits)=" << fhdr->macroblock_bit_offset;
82
83 return true;
84 }
85
86 static inline uint32_t GetBitsAt(uint32_t data, size_t shift, size_t num_bits) {
87 return ((data >> shift) & ((1 << num_bits) - 1));
88 }
89
90 bool Vp8Parser::ParseFrameTag(Vp8FrameHeader* fhdr) {
91 const size_t kFrameTagSize = 3;
92 if (bytes_left_ < kFrameTagSize)
93 return false;
94
95 uint32_t frame_tag = (stream_[2] << 16) | (stream_[1] << 8) | stream_[0];
96 fhdr->key_frame =
97 static_cast<Vp8FrameHeader::FrameType>(GetBitsAt(frame_tag, 0, 1));
98 fhdr->version = GetBitsAt(frame_tag, 1, 2);
99 fhdr->is_experimental = !!GetBitsAt(frame_tag, 3, 1);
100 fhdr->show_frame =!!GetBitsAt(frame_tag, 4, 1);
101 fhdr->first_part_size = GetBitsAt(frame_tag, 5, 19);
102
103 stream_ += kFrameTagSize;
104 bytes_left_ -= kFrameTagSize;
105
106 if (fhdr->IsKeyframe()) {
107 const size_t kKeyframeTagSize = 7;
108 if (bytes_left_ < kKeyframeTagSize)
109 return false;
110
111 static const uint8_t kVp8StartCode[] = {0x9d, 0x01, 0x2a};
112 if (memcmp(stream_, kVp8StartCode, sizeof(kVp8StartCode)) != 0)
113 return false;
114
115 stream_ += sizeof(kVp8StartCode);
116 bytes_left_ -= sizeof(kVp8StartCode);
117
118 uint16_t data = (stream_[1] << 8) | stream_[0];
119 fhdr->width = data & 0x3fff;
120 fhdr->horizontal_scale = data >> 14;
121
122 data = (stream_[3] << 8) | stream_[2];
123 fhdr->height = data & 0x3fff;
124 fhdr->vertical_scale = data >> 14;
125
126 stream_ += 4;
127 bytes_left_ -= 4;
128 }
129
130 return true;
131 }
132
133 bool Vp8Parser::ParseFrameHeader(Vp8FrameHeader* fhdr) {
134 if (!bd_.Initialize(stream_, bytes_left_))
135 return false;
136
137 bool keyframe = fhdr->IsKeyframe();
138 if (keyframe) {
139 unsigned int data;
140 BD_READ_UNSIGNED_OR_RETURN(1, &data); // color_space
141 BD_READ_UNSIGNED_OR_RETURN(1, &data); // clamping_type
142 }
143
144 if (!ParseSegmentationHeader(keyframe))
145 return false;
146
147 fhdr->segmentation_hdr = curr_segmentation_hdr_;
148
149 if (!ParseLoopFilterHeader(keyframe))
150 return false;
151
152 fhdr->loopfilter_hdr = curr_loopfilter_hdr_;
153
154 int log2_nbr_of_dct_partitions;
155 BD_READ_UNSIGNED_OR_RETURN(2, &log2_nbr_of_dct_partitions);
156 fhdr->num_of_dct_partitions =
157 static_cast<size_t>(1 << log2_nbr_of_dct_partitions);
158
159 if (!ParseQuantizationHeader(&fhdr->quantization_hdr))
160 return false;
161
162 if (keyframe) {
163 BD_READ_BOOL_OR_RETURN(&fhdr->refresh_entropy_probs);
164 } else {
165 BD_READ_BOOL_OR_RETURN(&fhdr->refresh_golden_frame);
166 BD_READ_BOOL_OR_RETURN(&fhdr->refresh_alternate_frame);
167
168 int refresh_mode;
169 if (!fhdr->refresh_golden_frame) {
170 BD_READ_UNSIGNED_OR_RETURN(2, &refresh_mode);
171 fhdr->copy_buffer_to_golden =
172 static_cast<Vp8FrameHeader::GoldenRefreshMode>(refresh_mode);
173 }
174
175 if (!fhdr->refresh_alternate_frame) {
176 BD_READ_UNSIGNED_OR_RETURN(2, &refresh_mode);
177 fhdr->copy_buffer_to_alternate =
178 static_cast<Vp8FrameHeader::AltRefreshMode>(refresh_mode);
179 }
180
181 BD_READ_UNSIGNED_OR_RETURN(1, &fhdr->sign_bias_golden);
182 BD_READ_UNSIGNED_OR_RETURN(1, &fhdr->sign_bias_alternate);
183 BD_READ_BOOL_OR_RETURN(&fhdr->refresh_entropy_probs);
184 BD_READ_BOOL_OR_RETURN(&fhdr->refresh_last);
185 }
186
187 if (keyframe)
188 ResetProbs();
189
190 fhdr->entropy_hdr = curr_entropy_hdr_;
191
192 if (!ParseTokenProbs(&fhdr->entropy_hdr, fhdr->refresh_entropy_probs))
193 return false;
194
195 BD_READ_BOOL_OR_RETURN(&fhdr->mb_no_skip_coeff);
196 if (fhdr->mb_no_skip_coeff)
197 BD_READ_UNSIGNED_OR_RETURN(8, &fhdr->prob_skip_false);
198
199 if (!keyframe) {
200 BD_READ_UNSIGNED_OR_RETURN(8, &fhdr->prob_intra);
201 BD_READ_UNSIGNED_OR_RETURN(8, &fhdr->prob_last);
202 BD_READ_UNSIGNED_OR_RETURN(8, &fhdr->prob_gf);
203 }
204
205 if (!ParseIntraProbs(&fhdr->entropy_hdr, fhdr->refresh_entropy_probs,
206 keyframe))
207 return false;
208
209 if (!keyframe) {
210 if (!ParseMVProbs(&fhdr->entropy_hdr, fhdr->refresh_entropy_probs))
211 return false;
212 }
213
214 fhdr->macroblock_bit_offset = bd_.BitOffset();
215 fhdr->bool_dec_range = bd_.GetRange();
216 fhdr->bool_dec_value = bd_.GetBottom();
217 fhdr->bool_dec_count = 7 - (bd_.BitOffset() + 7) % 8;
218
219 return true;
220 }
221
222 bool Vp8Parser::ParseSegmentationHeader(bool keyframe) {
223 Vp8SegmentationHeader* shdr = &curr_segmentation_hdr_;
224
225 if (keyframe)
226 memset(shdr, 0, sizeof(*shdr));
227
228 BD_READ_BOOL_OR_RETURN(&shdr->segmentation_enabled);
229 if (!shdr->segmentation_enabled)
230 return true;
231
232 BD_READ_BOOL_OR_RETURN(&shdr->update_mb_segmentation_map);
233 BD_READ_BOOL_OR_RETURN(&shdr->update_segment_feature_data);
234 if (shdr->update_segment_feature_data) {
235 int mode;
236 BD_READ_UNSIGNED_OR_RETURN(1, &mode);
237 shdr->segment_feature_mode =
238 static_cast<Vp8SegmentationHeader::SegmentFeatureMode>(mode);
239
240 for (size_t i = 0; i < kMaxMBSegments; ++i) {
241 bool quantizer_update;
242 BD_READ_BOOL_OR_RETURN(&quantizer_update);
243 if (quantizer_update)
244 BD_READ_SIGNED_OR_RETURN(7, &shdr->quantizer_update_value[i]);
245 }
246
247 for (size_t i = 0; i < kMaxMBSegments; ++i) {
248 bool loop_filter_update;
249 BD_READ_BOOL_OR_RETURN(&loop_filter_update);
250 if (loop_filter_update)
251 BD_READ_SIGNED_OR_RETURN(6, &shdr->lf_update_value[i]);
252 }
253 }
254
255 if (shdr->update_mb_segmentation_map) {
256 for (size_t i = 0; i < kNumMBFeatureTreeProbs; ++i) {
257 bool segment_prob_update;
258 BD_READ_BOOL_OR_RETURN(&segment_prob_update);
259 if (segment_prob_update)
260 BD_READ_UNSIGNED_OR_RETURN(8, &shdr->segment_prob[i]);
261 else
262 shdr->segment_prob[i] = Vp8SegmentationHeader::kDefaultSegmentProb;
263 }
264 }
265
266 return true;
267 }
268
269 bool Vp8Parser::ParseLoopFilterHeader(bool keyframe) {
270 Vp8LoopFilterHeader* lfhdr = &curr_loopfilter_hdr_;
271
272 if (keyframe)
273 memset(lfhdr, 0, sizeof(*lfhdr));
274
275 int type;
276 BD_READ_UNSIGNED_OR_RETURN(1, &type);
277 lfhdr->type = static_cast<Vp8LoopFilterHeader::Type>(type);
278 BD_READ_UNSIGNED_OR_RETURN(6, &lfhdr->level);
279 BD_READ_UNSIGNED_OR_RETURN(3, &lfhdr->sharpness_level);
280 BD_READ_BOOL_OR_RETURN(&lfhdr->loop_filter_adj_enable);
281
282 if (lfhdr->loop_filter_adj_enable) {
283 BD_READ_BOOL_OR_RETURN(&lfhdr->mode_ref_lf_delta_update);
284 if (lfhdr->mode_ref_lf_delta_update) {
285 for (size_t i = 0; i < kNumBlockContexts; ++i) {
286 bool ref_frame_delta_update_flag;
287 BD_READ_BOOL_OR_RETURN(&ref_frame_delta_update_flag);
288 if (ref_frame_delta_update_flag)
289 BD_READ_SIGNED_OR_RETURN(6, &lfhdr->ref_frame_delta[i]);
290 }
291
292 for (size_t i = 0; i < kNumBlockContexts; ++i) {
293 bool mb_mode_delta_update_flag;
294 BD_READ_BOOL_OR_RETURN(&mb_mode_delta_update_flag);
295 if (mb_mode_delta_update_flag)
296 BD_READ_SIGNED_OR_RETURN(6, &lfhdr->mb_mode_delta[i]);
297 }
298 }
299 }
300
301 return true;
302 }
303
304 bool Vp8Parser::ParseQuantizationHeader(Vp8QuantizationHeader* qhdr) {
305 // If any of the delta values is not present, the delta should be zero.
306 memset(qhdr, 0, sizeof(*qhdr));
307
308 BD_READ_UNSIGNED_OR_RETURN(7, &qhdr->y_ac_qi);
309
310 bool delta_present;
311
312 BD_READ_BOOL_OR_RETURN(&delta_present);
313 if (delta_present)
314 BD_READ_SIGNED_OR_RETURN(4, &qhdr->y_dc_delta);
315
316 BD_READ_BOOL_OR_RETURN(&delta_present);
317 if (delta_present)
318 BD_READ_SIGNED_OR_RETURN(4, &qhdr->y2_dc_delta);
319
320 BD_READ_BOOL_OR_RETURN(&delta_present);
321 if (delta_present)
322 BD_READ_SIGNED_OR_RETURN(4, &qhdr->y2_ac_delta);
323
324 BD_READ_BOOL_OR_RETURN(&delta_present);
325 if (delta_present)
326 BD_READ_SIGNED_OR_RETURN(4, &qhdr->uv_dc_delta);
327
328 BD_READ_BOOL_OR_RETURN(&delta_present);
329 if (delta_present)
330 BD_READ_SIGNED_OR_RETURN(4, &qhdr->uv_ac_delta);
331
332 return true;
333 }
334
335 // See spec for details on these values.
336 const uint8_t kCoeffUpdateProbs[kNumBlockTypes][kNumCoeffBands]
337 [kNumPrevCoeffContexts][kNumEntropyNodes] = {
338 {
339 {
340 {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
341 {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
342 {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
343 },
344 {
345 {176, 246, 255, 255, 255, 255, 255, 255, 255, 255, 255},
346 {223, 241, 252, 255, 255, 255, 255, 255, 255, 255, 255},
347 {249, 253, 253, 255, 255, 255, 255, 255, 255, 255, 255},
348 },
349 {
350 {255, 244, 252, 255, 255, 255, 255, 255, 255, 255, 255},
351 {234, 254, 254, 255, 255, 255, 255, 255, 255, 255, 255},
352 {253, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
353 },
354 {
355 {255, 246, 254, 255, 255, 255, 255, 255, 255, 255, 255},
356 {239, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255},
357 {254, 255, 254, 255, 255, 255, 255, 255, 255, 255, 255},
358 },
359 {
360 {255, 248, 254, 255, 255, 255, 255, 255, 255, 255, 255},
361 {251, 255, 254, 255, 255, 255, 255, 255, 255, 255, 255},
362 {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
363 },
364 {
365 {255, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255},
366 {251, 254, 254, 255, 255, 255, 255, 255, 255, 255, 255},
367 {254, 255, 254, 255, 255, 255, 255, 255, 255, 255, 255},
368 },
369 {
370 {255, 254, 253, 255, 254, 255, 255, 255, 255, 255, 255},
371 {250, 255, 254, 255, 254, 255, 255, 255, 255, 255, 255},
372 {254, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
373 },
374 {
375 {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
376 {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
377 {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
378 },
379 },
380 {
381 {
382 {217, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
383 {225, 252, 241, 253, 255, 255, 254, 255, 255, 255, 255},
384 {234, 250, 241, 250, 253, 255, 253, 254, 255, 255, 255},
385 },
386 {
387 {255, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255},
388 {223, 254, 254, 255, 255, 255, 255, 255, 255, 255, 255},
389 {238, 253, 254, 254, 255, 255, 255, 255, 255, 255, 255},
390 },
391 {
392 {255, 248, 254, 255, 255, 255, 255, 255, 255, 255, 255},
393 {249, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255},
394 {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
395 },
396 {
397 {255, 253, 255, 255, 255, 255, 255, 255, 255, 255, 255},
398 {247, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255},
399 {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
400 },
401 {
402 {255, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255},
403 {252, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
404 {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
405 },
406 {
407 {255, 254, 254, 255, 255, 255, 255, 255, 255, 255, 255},
408 {253, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
409 {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
410 },
411 {
412 {255, 254, 253, 255, 255, 255, 255, 255, 255, 255, 255},
413 {250, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
414 {254, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
415 },
416 {
417 {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
418 {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
419 {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
420 },
421 },
422 {
423 {
424 {186, 251, 250, 255, 255, 255, 255, 255, 255, 255, 255},
425 {234, 251, 244, 254, 255, 255, 255, 255, 255, 255, 255},
426 {251, 251, 243, 253, 254, 255, 254, 255, 255, 255, 255},
427 },
428 {
429 {255, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255},
430 {236, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255},
431 {251, 253, 253, 254, 254, 255, 255, 255, 255, 255, 255},
432 },
433 {
434 {255, 254, 254, 255, 255, 255, 255, 255, 255, 255, 255},
435 {254, 254, 254, 255, 255, 255, 255, 255, 255, 255, 255},
436 {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
437 },
438 {
439 {255, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255},
440 {254, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255},
441 {254, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
442 },
443 {
444 {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
445 {254, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
446 {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
447 },
448 {
449 {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
450 {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
451 {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
452 },
453 {
454 {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
455 {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
456 {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
457 },
458 {
459 {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
460 {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
461 {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
462 },
463 },
464 {
465 {
466 {248, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
467 {250, 254, 252, 254, 255, 255, 255, 255, 255, 255, 255},
468 {248, 254, 249, 253, 255, 255, 255, 255, 255, 255, 255},
469 },
470 {
471 {255, 253, 253, 255, 255, 255, 255, 255, 255, 255, 255},
472 {246, 253, 253, 255, 255, 255, 255, 255, 255, 255, 255},
473 {252, 254, 251, 254, 254, 255, 255, 255, 255, 255, 255},
474 },
475 {
476 {255, 254, 252, 255, 255, 255, 255, 255, 255, 255, 255},
477 {248, 254, 253, 255, 255, 255, 255, 255, 255, 255, 255},
478 {253, 255, 254, 254, 255, 255, 255, 255, 255, 255, 255},
479 },
480 {
481 {255, 251, 254, 255, 255, 255, 255, 255, 255, 255, 255},
482 {245, 251, 254, 255, 255, 255, 255, 255, 255, 255, 255},
483 {253, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255},
484 },
485 {
486 {255, 251, 253, 255, 255, 255, 255, 255, 255, 255, 255},
487 {252, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255},
488 {255, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255},
489 },
490 {
491 {255, 252, 255, 255, 255, 255, 255, 255, 255, 255, 255},
492 {249, 255, 254, 255, 255, 255, 255, 255, 255, 255, 255},
493 {255, 255, 254, 255, 255, 255, 255, 255, 255, 255, 255},
494 },
495 {
496 {255, 255, 253, 255, 255, 255, 255, 255, 255, 255, 255},
497 {250, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
498 {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
499 },
500 {
501 {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
502 {254, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
503 {255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
504 },
505 },
506 };
507
508 const uint8_t kKeyframeYModeProbs[kNumYModeProbs] = {145, 156, 163, 128};
509 const uint8_t kKeyframeUVModeProbs[kNumUVModeProbs] = {142, 114, 183};
510
511 const uint8_t kDefaultYModeProbs[kNumYModeProbs] = {112, 86, 140, 37};
512 const uint8_t kDefaultUVModeProbs[kNumUVModeProbs] = {162, 101, 204};
513
514 const uint8_t kDefaultCoeffProbs[kNumBlockTypes][kNumCoeffBands]
515 [kNumPrevCoeffContexts][kNumEntropyNodes] = {
516 {
517 {
518 {128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128},
519 {128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128},
520 {128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128},
521 },
522 {
523 {253, 136, 254, 255, 228, 219, 128, 128, 128, 128, 128},
524 {189, 129, 242, 255, 227, 213, 255, 219, 128, 128, 128},
525 {106, 126, 227, 252, 214, 209, 255, 255, 128, 128, 128},
526 },
527 {
528 { 1, 98, 248, 255, 236, 226, 255, 255, 128, 128, 128},
529 {181, 133, 238, 254, 221, 234, 255, 154, 128, 128, 128},
530 { 78, 134, 202, 247, 198, 180, 255, 219, 128, 128, 128},
531 },
532 {
533 { 1, 185, 249, 255, 243, 255, 128, 128, 128, 128, 128},
534 {184, 150, 247, 255, 236, 224, 128, 128, 128, 128, 128},
535 { 77, 110, 216, 255, 236, 230, 128, 128, 128, 128, 128},
536 },
537 {
538 { 1, 101, 251, 255, 241, 255, 128, 128, 128, 128, 128},
539 {170, 139, 241, 252, 236, 209, 255, 255, 128, 128, 128},
540 { 37, 116, 196, 243, 228, 255, 255, 255, 128, 128, 128},
541 },
542 {
543 { 1, 204, 254, 255, 245, 255, 128, 128, 128, 128, 128},
544 {207, 160, 250, 255, 238, 128, 128, 128, 128, 128, 128},
545 {102, 103, 231, 255, 211, 171, 128, 128, 128, 128, 128},
546 },
547 {
548 { 1, 152, 252, 255, 240, 255, 128, 128, 128, 128, 128},
549 {177, 135, 243, 255, 234, 225, 128, 128, 128, 128, 128},
550 { 80, 129, 211, 255, 194, 224, 128, 128, 128, 128, 128},
551 },
552 {
553 { 1, 1, 255, 128, 128, 128, 128, 128, 128, 128, 128},
554 {246, 1, 255, 128, 128, 128, 128, 128, 128, 128, 128},
555 {255, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128},
556 }
557 },
558 {
559 {
560 {198, 35, 237, 223, 193, 187, 162, 160, 145, 155, 62},
561 {131, 45, 198, 221, 172, 176, 220, 157, 252, 221, 1},
562 { 68, 47, 146, 208, 149, 167, 221, 162, 255, 223, 128},
563 },
564 {
565 { 1, 149, 241, 255, 221, 224, 255, 255, 128, 128, 128},
566 {184, 141, 234, 253, 222, 220, 255, 199, 128, 128, 128},
567 { 81, 99, 181, 242, 176, 190, 249, 202, 255, 255, 128},
568 },
569 {
570 { 1, 129, 232, 253, 214, 197, 242, 196, 255, 255, 128},
571 { 99, 121, 210, 250, 201, 198, 255, 202, 128, 128, 128},
572 { 23, 91, 163, 242, 170, 187, 247, 210, 255, 255, 128},
573 },
574 {
575 { 1, 200, 246, 255, 234, 255, 128, 128, 128, 128, 128},
576 {109, 178, 241, 255, 231, 245, 255, 255, 128, 128, 128},
577 { 44, 130, 201, 253, 205, 192, 255, 255, 128, 128, 128},
578 },
579 {
580 { 1, 132, 239, 251, 219, 209, 255, 165, 128, 128, 128},
581 { 94, 136, 225, 251, 218, 190, 255, 255, 128, 128, 128},
582 { 22, 100, 174, 245, 186, 161, 255, 199, 128, 128, 128},
583 },
584 {
585 { 1, 182, 249, 255, 232, 235, 128, 128, 128, 128, 128},
586 {124, 143, 241, 255, 227, 234, 128, 128, 128, 128, 128},
587 { 35, 77, 181, 251, 193, 211, 255, 205, 128, 128, 128},
588 },
589 {
590 { 1, 157, 247, 255, 236, 231, 255, 255, 128, 128, 128},
591 {121, 141, 235, 255, 225, 227, 255, 255, 128, 128, 128},
592 { 45, 99, 188, 251, 195, 217, 255, 224, 128, 128, 128},
593 },
594 {
595 { 1, 1, 251, 255, 213, 255, 128, 128, 128, 128, 128},
596 {203, 1, 248, 255, 255, 128, 128, 128, 128, 128, 128},
597 {137, 1, 177, 255, 224, 255, 128, 128, 128, 128, 128},
598 }
599 },
600 {
601 {
602 {253, 9, 248, 251, 207, 208, 255, 192, 128, 128, 128},
603 {175, 13, 224, 243, 193, 185, 249, 198, 255, 255, 128},
604 { 73, 17, 171, 221, 161, 179, 236, 167, 255, 234, 128},
605 },
606 {
607 { 1, 95, 247, 253, 212, 183, 255, 255, 128, 128, 128},
608 {239, 90, 244, 250, 211, 209, 255, 255, 128, 128, 128},
609 {155, 77, 195, 248, 188, 195, 255, 255, 128, 128, 128},
610 },
611 {
612 { 1, 24, 239, 251, 218, 219, 255, 205, 128, 128, 128},
613 {201, 51, 219, 255, 196, 186, 128, 128, 128, 128, 128},
614 { 69, 46, 190, 239, 201, 218, 255, 228, 128, 128, 128},
615 },
616 {
617 { 1, 191, 251, 255, 255, 128, 128, 128, 128, 128, 128},
618 {223, 165, 249, 255, 213, 255, 128, 128, 128, 128, 128},
619 {141, 124, 248, 255, 255, 128, 128, 128, 128, 128, 128},
620 },
621 {
622 { 1, 16, 248, 255, 255, 128, 128, 128, 128, 128, 128},
623 {190, 36, 230, 255, 236, 255, 128, 128, 128, 128, 128},
624 {149, 1, 255, 128, 128, 128, 128, 128, 128, 128, 128},
625 },
626 {
627 { 1, 226, 255, 128, 128, 128, 128, 128, 128, 128, 128},
628 {247, 192, 255, 128, 128, 128, 128, 128, 128, 128, 128},
629 {240, 128, 255, 128, 128, 128, 128, 128, 128, 128, 128},
630 },
631 {
632 { 1, 134, 252, 255, 255, 128, 128, 128, 128, 128, 128},
633 {213, 62, 250, 255, 255, 128, 128, 128, 128, 128, 128},
634 { 55, 93, 255, 128, 128, 128, 128, 128, 128, 128, 128},
635 },
636 {
637 {128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128},
638 {128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128},
639 {128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128},
640 }
641 },
642 {
643 {
644 {202, 24, 213, 235, 186, 191, 220, 160, 240, 175, 255},
645 {126, 38, 182, 232, 169, 184, 228, 174, 255, 187, 128},
646 { 61, 46, 138, 219, 151, 178, 240, 170, 255, 216, 128},
647 },
648 {
649 { 1, 112, 230, 250, 199, 191, 247, 159, 255, 255, 128},
650 {166, 109, 228, 252, 211, 215, 255, 174, 128, 128, 128},
651 { 39, 77, 162, 232, 172, 180, 245, 178, 255, 255, 128},
652 },
653 {
654 { 1, 52, 220, 246, 198, 199, 249, 220, 255, 255, 128},
655 {124, 74, 191, 243, 183, 193, 250, 221, 255, 255, 128},
656 { 24, 71, 130, 219, 154, 170, 243, 182, 255, 255, 128},
657 },
658 {
659 { 1, 182, 225, 249, 219, 240, 255, 224, 128, 128, 128},
660 {149, 150, 226, 252, 216, 205, 255, 171, 128, 128, 128},
661 { 28, 108, 170, 242, 183, 194, 254, 223, 255, 255, 128}
662 },
663 {
664 { 1, 81, 230, 252, 204, 203, 255, 192, 128, 128, 128},
665 {123, 102, 209, 247, 188, 196, 255, 233, 128, 128, 128},
666 { 20, 95, 153, 243, 164, 173, 255, 203, 128, 128, 128},
667 },
668 {
669 { 1, 222, 248, 255, 216, 213, 128, 128, 128, 128, 128},
670 {168, 175, 246, 252, 235, 205, 255, 255, 128, 128, 128},
671 { 47, 116, 215, 255, 211, 212, 255, 255, 128, 128, 128},
672 },
673 {
674 { 1, 121, 236, 253, 212, 214, 255, 255, 128, 128, 128},
675 {141, 84, 213, 252, 201, 202, 255, 219, 128, 128, 128},
676 { 42, 80, 160, 240, 162, 185, 255, 205, 128, 128, 128},
677 },
678 {
679 { 1, 1, 255, 128, 128, 128, 128, 128, 128, 128, 128},
680 {244, 1, 255, 128, 128, 128, 128, 128, 128, 128, 128},
681 {238, 1, 255, 128, 128, 128, 128, 128, 128, 128, 128},
682 },
683 },
684 };
685
686 const uint8_t kMVUpdateProbs[kNumMVContexts][kNumMVProbs] =
687 {
688 {
689 237, 246, 253, 253, 254, 254, 254, 254, 254,
690 254, 254, 254, 254, 254, 250, 250, 252, 254, 254,
691 },
692 {
693 231, 243, 245, 253, 254, 254, 254, 254, 254,
694 254, 254, 254, 254, 254, 251, 251, 254, 254, 254,
695 },
696 };
697
698 const uint8_t kDefaultMVProbs[kNumMVContexts][kNumMVProbs] = {
699 {
700 162, 128, 225, 146, 172, 147, 214, 39, 156,
701 128, 129, 132, 75, 145, 178, 206, 239, 254, 254,
702 },
703 {
704 164, 128, 204, 170, 119, 235, 140, 230, 228,
705 128, 130, 130, 74, 148, 180, 203, 236, 254, 254,
706 },
707 };
708
709 void Vp8Parser::ResetProbs() {
710 static_assert(
711 sizeof(curr_entropy_hdr_.coeff_probs) == sizeof(kDefaultCoeffProbs),
712 "coeff_probs_arrays_must_be_of_correct_size");
713 memcpy(curr_entropy_hdr_.coeff_probs, kDefaultCoeffProbs,
714 sizeof(curr_entropy_hdr_.coeff_probs));
715
716 static_assert(sizeof(curr_entropy_hdr_.mv_probs) == sizeof(kDefaultMVProbs),
717 "mv_probs_arrays_must_be_of_correct_size");
718 memcpy(curr_entropy_hdr_.mv_probs, kDefaultMVProbs,
719 sizeof(curr_entropy_hdr_.mv_probs));
720
721 static_assert(
722 sizeof(curr_entropy_hdr_.y_mode_probs) == sizeof(kDefaultYModeProbs),
723 "y_probs_arrays_must_be_of_correct_size");
724 memcpy(curr_entropy_hdr_.y_mode_probs, kDefaultYModeProbs,
725 sizeof(curr_entropy_hdr_.y_mode_probs));
726
727 static_assert(
728 sizeof(curr_entropy_hdr_.uv_mode_probs) == sizeof(kDefaultUVModeProbs),
729 "uv_probs_arrays_must_be_of_correct_size");
730 memcpy(curr_entropy_hdr_.uv_mode_probs, kDefaultUVModeProbs,
731 sizeof(curr_entropy_hdr_.uv_mode_probs));
732 }
733
734 bool Vp8Parser::ParseTokenProbs(Vp8EntropyHeader* ehdr,
735 bool update_curr_probs) {
736 for (size_t i = 0; i < kNumBlockTypes; ++i) {
737 for (size_t j = 0; j < kNumCoeffBands; ++j) {
738 for (size_t k = 0; k < kNumPrevCoeffContexts; ++k) {
739 for (size_t l = 0; l < kNumEntropyNodes; ++l) {
740 bool coeff_prob_update_flag;
741 BD_READ_BOOL_WITH_PROB_OR_RETURN(&coeff_prob_update_flag,
742 kCoeffUpdateProbs[i][j][k][l]);
743 if (coeff_prob_update_flag)
744 BD_READ_UNSIGNED_OR_RETURN(8, &ehdr->coeff_probs[i][j][k][l]);
745 }
746 }
747 }
748 }
749
750 if (update_curr_probs) {
751 memcpy(curr_entropy_hdr_.coeff_probs, ehdr->coeff_probs,
752 sizeof(curr_entropy_hdr_.coeff_probs));
753 }
754
755 return true;
756 }
757
758 bool Vp8Parser::ParseIntraProbs(Vp8EntropyHeader* ehdr,
759 bool update_curr_probs,
760 bool keyframe) {
761 if (keyframe) {
762 static_assert(
763 sizeof(ehdr->y_mode_probs) == sizeof(kKeyframeYModeProbs),
764 "y_probs_arrays_must_be_of_correct_size");
765 memcpy(ehdr->y_mode_probs, kKeyframeYModeProbs,
766 sizeof(ehdr->y_mode_probs));
767
768 static_assert(
769 sizeof(ehdr->uv_mode_probs) == sizeof(kKeyframeUVModeProbs),
770 "uv_probs_arrays_must_be_of_correct_size");
771 memcpy(ehdr->uv_mode_probs, kKeyframeUVModeProbs,
772 sizeof(ehdr->uv_mode_probs));
773 } else {
774 bool intra_16x16_prob_update_flag;
775 BD_READ_BOOL_OR_RETURN(&intra_16x16_prob_update_flag);
776 if (intra_16x16_prob_update_flag) {
777 for (size_t i = 0; i < kNumYModeProbs; ++i)
778 BD_READ_UNSIGNED_OR_RETURN(8, &ehdr->y_mode_probs[i]);
779
780 if (update_curr_probs) {
781 memcpy(curr_entropy_hdr_.y_mode_probs, ehdr->y_mode_probs,
782 sizeof(curr_entropy_hdr_.y_mode_probs));
783 }
784 }
785
786 bool intra_chroma_prob_update_flag;
787 BD_READ_BOOL_OR_RETURN(&intra_chroma_prob_update_flag);
788 if (intra_chroma_prob_update_flag) {
789 for (size_t i = 0; i < kNumUVModeProbs; ++i)
790 BD_READ_UNSIGNED_OR_RETURN(8, &ehdr->uv_mode_probs[i]);
791
792 if (update_curr_probs) {
793 memcpy(curr_entropy_hdr_.uv_mode_probs, ehdr->uv_mode_probs,
794 sizeof(curr_entropy_hdr_.uv_mode_probs));
795 }
796 }
797 }
798
799 return true;
800 }
801
802 bool Vp8Parser::ParseMVProbs(Vp8EntropyHeader* ehdr, bool update_curr_probs) {
803 for (size_t mv_ctx = 0; mv_ctx < kNumMVContexts; ++mv_ctx) {
804 for (size_t p = 0; p < kNumMVProbs; ++p) {
805 bool mv_prob_update_flag;
806 BD_READ_BOOL_WITH_PROB_OR_RETURN(&mv_prob_update_flag,
807 kMVUpdateProbs[mv_ctx][p]);
808 if (mv_prob_update_flag) {
809 uint8_t prob;
810 BD_READ_UNSIGNED_OR_RETURN(7, &prob);
811 ehdr->mv_probs[mv_ctx][p] = prob ? (prob << 1) : 1;
812 }
813 }
814 }
815
816 if (update_curr_probs) {
817 memcpy(curr_entropy_hdr_.mv_probs, ehdr->mv_probs,
818 sizeof(curr_entropy_hdr_.mv_probs));
819 }
820
821 return true;
822 }
823
824 bool Vp8Parser::ParsePartitions(Vp8FrameHeader* fhdr) {
825 CHECK_GE(fhdr->num_of_dct_partitions, 1u);
826 CHECK_LE(fhdr->num_of_dct_partitions, kMaxDCTPartitions);
827
828 // DCT partitions start after the first partition and partition size values
829 // that follow it. There are num_of_dct_partitions - 1 sizes stored in the
830 // stream after the first partition, each 3 bytes long. The size of last
831 // DCT partition is not stored in the stream, but is instead calculated by
832 // taking the remainder of the frame size after the penultimate DCT partition.
833 size_t first_dct_pos = fhdr->first_part_offset + fhdr->first_part_size +
834 (fhdr->num_of_dct_partitions - 1) * 3;
835
836 // Make sure we have enough data for the first partition and partition sizes.
837 if (fhdr->frame_size < first_dct_pos)
838 return false;
839
840 // Total size of all DCT partitions.
841 size_t bytes_left = fhdr->frame_size - first_dct_pos;
842
843 // Position ourselves at the beginning of partition size values.
844 const uint8_t* ptr =
845 fhdr->data + fhdr->first_part_offset + fhdr->first_part_size;
846
847 // Read sizes from the stream (if present).
848 for (size_t i = 0; i < fhdr->num_of_dct_partitions - 1; ++i) {
849 fhdr->dct_partition_sizes[i] = (ptr[2] << 16) | (ptr[1] << 8) | ptr[0];
850
851 // Make sure we have enough data in the stream for ith partition and
852 // subtract its size from total.
853 if (bytes_left < fhdr->dct_partition_sizes[i])
854 return false;
855
856 bytes_left -= fhdr->dct_partition_sizes[i];
857
858 // Move to the position of the next partition size value.
859 ptr += 3;
860 }
861
862 // The remainder of the data belongs to the last DCT partition.
863 fhdr->dct_partition_sizes[fhdr->num_of_dct_partitions - 1] = bytes_left;
864
865 DVLOG(4) << "Control part size: " << fhdr->first_part_size;
866 for (size_t i = 0; i < fhdr->num_of_dct_partitions; ++i)
867 DVLOG(4) << "DCT part " << i << " size: " << fhdr->dct_partition_sizes[i];
868
869 return true;
870 }
871
872 } // namespace media