/src/libwebp/src/dec/tree_dec.c

Line	Count	Source
1		// Copyright 2010 Google Inc. All Rights Reserved.
2		//
3		// Use of this source code is governed by a BSD-style license
4		// that can be found in the COPYING file in the root of the source
5		// tree. An additional intellectual property rights grant can be found
6		// in the file PATENTS. All contributing project authors may
7		// be found in the AUTHORS file in the root of the source tree.
8		// -----------------------------------------------------------------------------
9		//
10		// Coding trees and probas
11		//
12		// Author: Skal (pascal.massimino@gmail.com)
13
14		#include <string.h>
15
16		#include "src/dec/common_dec.h"
17		#include "src/dec/vp8_dec.h"
18		#include "src/dec/vp8i_dec.h"
19		#include "src/dsp/cpu.h"
20		#include "src/utils/bit_reader_inl_utils.h"
21		#include "src/utils/bit_reader_utils.h"
22		#include "src/webp/types.h"
23
24		WEBP_ASSUME_UNSAFE_INDEXABLE_ABI
25
26		#if !defined(USE_GENERIC_TREE)
27		#if !defined(__arm__) && !defined(_M_ARM) && !WEBP_AARCH64 && !defined(__wasm__)
28		// using a table is ~1-2% slower on ARM. Prefer the coded-tree approach then.
29		#define USE_GENERIC_TREE 1 // ALTERNATE_CODE
30		#else
31		#define USE_GENERIC_TREE 0
32		#endif
33		#endif // USE_GENERIC_TREE
34
35		#if (USE_GENERIC_TREE == 1)
36		static const int8_t kYModesIntra4[18] = {
37		-B_DC_PRED, 1, -B_TM_PRED, 2, -B_VE_PRED, 3,
38		4, 6, -B_HE_PRED, 5, -B_RD_PRED, -B_VR_PRED,
39		-B_LD_PRED, 7, -B_VL_PRED, 8, -B_HD_PRED, -B_HU_PRED};
40		#endif
41
42		//------------------------------------------------------------------------------
43		// Default probabilities
44
45		// Paragraph 13.5
46		static const uint8_t CoeffsProba0[NUM_TYPES][NUM_BANDS][NUM_CTX][NUM_PROBAS] = {
47		{{{128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128},
48		{128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128},
49		{128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128}},
50		{{253, 136, 254, 255, 228, 219, 128, 128, 128, 128, 128},
51		{189, 129, 242, 255, 227, 213, 255, 219, 128, 128, 128},
52		{106, 126, 227, 252, 214, 209, 255, 255, 128, 128, 128}},
53		{
54		{1, 98, 248, 255, 236, 226, 255, 255, 128, 128, 128},
55		{181, 133, 238, 254, 221, 234, 255, 154, 128, 128, 128},
56		{78, 134, 202, 247, 198, 180, 255, 219, 128, 128, 128},
57		},
58		{
59		{1, 185, 249, 255, 243, 255, 128, 128, 128, 128, 128},
60		{184, 150, 247, 255, 236, 224, 128, 128, 128, 128, 128},
61		{77, 110, 216, 255, 236, 230, 128, 128, 128, 128, 128},
62		},
63		{{1, 101, 251, 255, 241, 255, 128, 128, 128, 128, 128},
64		{170, 139, 241, 252, 236, 209, 255, 255, 128, 128, 128},
65		{37, 116, 196, 243, 228, 255, 255, 255, 128, 128, 128}},
66		{{1, 204, 254, 255, 245, 255, 128, 128, 128, 128, 128},
67		{207, 160, 250, 255, 238, 128, 128, 128, 128, 128, 128},
68		{102, 103, 231, 255, 211, 171, 128, 128, 128, 128, 128}},
69		{{1, 152, 252, 255, 240, 255, 128, 128, 128, 128, 128},
70		{177, 135, 243, 255, 234, 225, 128, 128, 128, 128, 128},
71		{80, 129, 211, 255, 194, 224, 128, 128, 128, 128, 128}},
72		{{1, 1, 255, 128, 128, 128, 128, 128, 128, 128, 128},
73		{246, 1, 255, 128, 128, 128, 128, 128, 128, 128, 128},
74		{255, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128}}},
75		{{{198, 35, 237, 223, 193, 187, 162, 160, 145, 155, 62},
76		{131, 45, 198, 221, 172, 176, 220, 157, 252, 221, 1},
77		{68, 47, 146, 208, 149, 167, 221, 162, 255, 223, 128}},
78		{{1, 149, 241, 255, 221, 224, 255, 255, 128, 128, 128},
79		{184, 141, 234, 253, 222, 220, 255, 199, 128, 128, 128},
80		{81, 99, 181, 242, 176, 190, 249, 202, 255, 255, 128}},
81		{{1, 129, 232, 253, 214, 197, 242, 196, 255, 255, 128},
82		{99, 121, 210, 250, 201, 198, 255, 202, 128, 128, 128},
83		{23, 91, 163, 242, 170, 187, 247, 210, 255, 255, 128}},
84		{{1, 200, 246, 255, 234, 255, 128, 128, 128, 128, 128},
85		{109, 178, 241, 255, 231, 245, 255, 255, 128, 128, 128},
86		{44, 130, 201, 253, 205, 192, 255, 255, 128, 128, 128}},
87		{{1, 132, 239, 251, 219, 209, 255, 165, 128, 128, 128},
88		{94, 136, 225, 251, 218, 190, 255, 255, 128, 128, 128},
89		{22, 100, 174, 245, 186, 161, 255, 199, 128, 128, 128}},
90		{{1, 182, 249, 255, 232, 235, 128, 128, 128, 128, 128},
91		{124, 143, 241, 255, 227, 234, 128, 128, 128, 128, 128},
92		{35, 77, 181, 251, 193, 211, 255, 205, 128, 128, 128}},
93		{{1, 157, 247, 255, 236, 231, 255, 255, 128, 128, 128},
94		{121, 141, 235, 255, 225, 227, 255, 255, 128, 128, 128},
95		{45, 99, 188, 251, 195, 217, 255, 224, 128, 128, 128}},
96		{{1, 1, 251, 255, 213, 255, 128, 128, 128, 128, 128},
97		{203, 1, 248, 255, 255, 128, 128, 128, 128, 128, 128},
98		{137, 1, 177, 255, 224, 255, 128, 128, 128, 128, 128}}},
99		{{{253, 9, 248, 251, 207, 208, 255, 192, 128, 128, 128},
100		{175, 13, 224, 243, 193, 185, 249, 198, 255, 255, 128},
101		{73, 17, 171, 221, 161, 179, 236, 167, 255, 234, 128}},
102		{{1, 95, 247, 253, 212, 183, 255, 255, 128, 128, 128},
103		{239, 90, 244, 250, 211, 209, 255, 255, 128, 128, 128},
104		{155, 77, 195, 248, 188, 195, 255, 255, 128, 128, 128}},
105		{{1, 24, 239, 251, 218, 219, 255, 205, 128, 128, 128},
106		{201, 51, 219, 255, 196, 186, 128, 128, 128, 128, 128},
107		{69, 46, 190, 239, 201, 218, 255, 228, 128, 128, 128}},
108		{{1, 191, 251, 255, 255, 128, 128, 128, 128, 128, 128},
109		{223, 165, 249, 255, 213, 255, 128, 128, 128, 128, 128},
110		{141, 124, 248, 255, 255, 128, 128, 128, 128, 128, 128}},
111		{{1, 16, 248, 255, 255, 128, 128, 128, 128, 128, 128},
112		{190, 36, 230, 255, 236, 255, 128, 128, 128, 128, 128},
113		{149, 1, 255, 128, 128, 128, 128, 128, 128, 128, 128}},
114		{{1, 226, 255, 128, 128, 128, 128, 128, 128, 128, 128},
115		{247, 192, 255, 128, 128, 128, 128, 128, 128, 128, 128},
116		{240, 128, 255, 128, 128, 128, 128, 128, 128, 128, 128}},
117		{{1, 134, 252, 255, 255, 128, 128, 128, 128, 128, 128},
118		{213, 62, 250, 255, 255, 128, 128, 128, 128, 128, 128},
119		{55, 93, 255, 128, 128, 128, 128, 128, 128, 128, 128}},
120		{{128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128},
121		{128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128},
122		{128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128}}},
123		{{{202, 24, 213, 235, 186, 191, 220, 160, 240, 175, 255},
124		{126, 38, 182, 232, 169, 184, 228, 174, 255, 187, 128},
125		{61, 46, 138, 219, 151, 178, 240, 170, 255, 216, 128}},
126		{{1, 112, 230, 250, 199, 191, 247, 159, 255, 255, 128},
127		{166, 109, 228, 252, 211, 215, 255, 174, 128, 128, 128},
128		{39, 77, 162, 232, 172, 180, 245, 178, 255, 255, 128}},
129		{{1, 52, 220, 246, 198, 199, 249, 220, 255, 255, 128},
130		{124, 74, 191, 243, 183, 193, 250, 221, 255, 255, 128},
131		{24, 71, 130, 219, 154, 170, 243, 182, 255, 255, 128}},
132		{{1, 182, 225, 249, 219, 240, 255, 224, 128, 128, 128},
133		{149, 150, 226, 252, 216, 205, 255, 171, 128, 128, 128},
134		{28, 108, 170, 242, 183, 194, 254, 223, 255, 255, 128}},
135		{{1, 81, 230, 252, 204, 203, 255, 192, 128, 128, 128},
136		{123, 102, 209, 247, 188, 196, 255, 233, 128, 128, 128},
137		{20, 95, 153, 243, 164, 173, 255, 203, 128, 128, 128}},
138		{{1, 222, 248, 255, 216, 213, 128, 128, 128, 128, 128},
139		{168, 175, 246, 252, 235, 205, 255, 255, 128, 128, 128},
140		{47, 116, 215, 255, 211, 212, 255, 255, 128, 128, 128}},
141		{{1, 121, 236, 253, 212, 214, 255, 255, 128, 128, 128},
142		{141, 84, 213, 252, 201, 202, 255, 219, 128, 128, 128},
143		{42, 80, 160, 240, 162, 185, 255, 205, 128, 128, 128}},
144		{{1, 1, 255, 128, 128, 128, 128, 128, 128, 128, 128},
145		{244, 1, 255, 128, 128, 128, 128, 128, 128, 128, 128},
146		{238, 1, 255, 128, 128, 128, 128, 128, 128, 128, 128}}}};
147
148		// Paragraph 11.5
149		static const uint8_t kBModesProba[NUM_BMODES][NUM_BMODES][NUM_BMODES - 1] = {
150		{{231, 120, 48, 89, 115, 113, 120, 152, 112},
151		{152, 179, 64, 126, 170, 118, 46, 70, 95},
152		{175, 69, 143, 80, 85, 82, 72, 155, 103},
153		{56, 58, 10, 171, 218, 189, 17, 13, 152},
154		{114, 26, 17, 163, 44, 195, 21, 10, 173},
155		{121, 24, 80, 195, 26, 62, 44, 64, 85},
156		{144, 71, 10, 38, 171, 213, 144, 34, 26},
157		{170, 46, 55, 19, 136, 160, 33, 206, 71},
158		{63, 20, 8, 114, 114, 208, 12, 9, 226},
159		{81, 40, 11, 96, 182, 84, 29, 16, 36}},
160		{{134, 183, 89, 137, 98, 101, 106, 165, 148},
161		{72, 187, 100, 130, 157, 111, 32, 75, 80},
162		{66, 102, 167, 99, 74, 62, 40, 234, 128},
163		{41, 53, 9, 178, 241, 141, 26, 8, 107},
164		{74, 43, 26, 146, 73, 166, 49, 23, 157},
165		{65, 38, 105, 160, 51, 52, 31, 115, 128},
166		{104, 79, 12, 27, 217, 255, 87, 17, 7},
167		{87, 68, 71, 44, 114, 51, 15, 186, 23},
168		{47, 41, 14, 110, 182, 183, 21, 17, 194},
169		{66, 45, 25, 102, 197, 189, 23, 18, 22}},
170		{{88, 88, 147, 150, 42, 46, 45, 196, 205},
171		{43, 97, 183, 117, 85, 38, 35, 179, 61},
172		{39, 53, 200, 87, 26, 21, 43, 232, 171},
173		{56, 34, 51, 104, 114, 102, 29, 93, 77},
174		{39, 28, 85, 171, 58, 165, 90, 98, 64},
175		{34, 22, 116, 206, 23, 34, 43, 166, 73},
176		{107, 54, 32, 26, 51, 1, 81, 43, 31},
177		{68, 25, 106, 22, 64, 171, 36, 225, 114},
178		{34, 19, 21, 102, 132, 188, 16, 76, 124},
179		{62, 18, 78, 95, 85, 57, 50, 48, 51}},
180		{{193, 101, 35, 159, 215, 111, 89, 46, 111},
181		{60, 148, 31, 172, 219, 228, 21, 18, 111},
182		{112, 113, 77, 85, 179, 255, 38, 120, 114},
183		{40, 42, 1, 196, 245, 209, 10, 25, 109},
184		{88, 43, 29, 140, 166, 213, 37, 43, 154},
185		{61, 63, 30, 155, 67, 45, 68, 1, 209},
186		{100, 80, 8, 43, 154, 1, 51, 26, 71},
187		{142, 78, 78, 16, 255, 128, 34, 197, 171},
188		{41, 40, 5, 102, 211, 183, 4, 1, 221},
189		{51, 50, 17, 168, 209, 192, 23, 25, 82}},
190		{{138, 31, 36, 171, 27, 166, 38, 44, 229},
191		{67, 87, 58, 169, 82, 115, 26, 59, 179},
192		{63, 59, 90, 180, 59, 166, 93, 73, 154},
193		{40, 40, 21, 116, 143, 209, 34, 39, 175},
194		{47, 15, 16, 183, 34, 223, 49, 45, 183},
195		{46, 17, 33, 183, 6, 98, 15, 32, 183},
196		{57, 46, 22, 24, 128, 1, 54, 17, 37},
197		{65, 32, 73, 115, 28, 128, 23, 128, 205},
198		{40, 3, 9, 115, 51, 192, 18, 6, 223},
199		{87, 37, 9, 115, 59, 77, 64, 21, 47}},
200		{{104, 55, 44, 218, 9, 54, 53, 130, 226},
201		{64, 90, 70, 205, 40, 41, 23, 26, 57},
202		{54, 57, 112, 184, 5, 41, 38, 166, 213},
203		{30, 34, 26, 133, 152, 116, 10, 32, 134},
204		{39, 19, 53, 221, 26, 114, 32, 73, 255},
205		{31, 9, 65, 234, 2, 15, 1, 118, 73},
206		{75, 32, 12, 51, 192, 255, 160, 43, 51},
207		{88, 31, 35, 67, 102, 85, 55, 186, 85},
208		{56, 21, 23, 111, 59, 205, 45, 37, 192},
209		{55, 38, 70, 124, 73, 102, 1, 34, 98}},
210		{{125, 98, 42, 88, 104, 85, 117, 175, 82},
211		{95, 84, 53, 89, 128, 100, 113, 101, 45},
212		{75, 79, 123, 47, 51, 128, 81, 171, 1},
213		{57, 17, 5, 71, 102, 57, 53, 41, 49},
214		{38, 33, 13, 121, 57, 73, 26, 1, 85},
215		{41, 10, 67, 138, 77, 110, 90, 47, 114},
216		{115, 21, 2, 10, 102, 255, 166, 23, 6},
217		{101, 29, 16, 10, 85, 128, 101, 196, 26},
218		{57, 18, 10, 102, 102, 213, 34, 20, 43},
219		{117, 20, 15, 36, 163, 128, 68, 1, 26}},
220		{{102, 61, 71, 37, 34, 53, 31, 243, 192},
221		{69, 60, 71, 38, 73, 119, 28, 222, 37},
222		{68, 45, 128, 34, 1, 47, 11, 245, 171},
223		{62, 17, 19, 70, 146, 85, 55, 62, 70},
224		{37, 43, 37, 154, 100, 163, 85, 160, 1},
225		{63, 9, 92, 136, 28, 64, 32, 201, 85},
226		{75, 15, 9, 9, 64, 255, 184, 119, 16},
227		{86, 6, 28, 5, 64, 255, 25, 248, 1},
228		{56, 8, 17, 132, 137, 255, 55, 116, 128},
229		{58, 15, 20, 82, 135, 57, 26, 121, 40}},
230		{{164, 50, 31, 137, 154, 133, 25, 35, 218},
231		{51, 103, 44, 131, 131, 123, 31, 6, 158},
232		{86, 40, 64, 135, 148, 224, 45, 183, 128},
233		{22, 26, 17, 131, 240, 154, 14, 1, 209},
234		{45, 16, 21, 91, 64, 222, 7, 1, 197},
235		{56, 21, 39, 155, 60, 138, 23, 102, 213},
236		{83, 12, 13, 54, 192, 255, 68, 47, 28},
237		{85, 26, 85, 85, 128, 128, 32, 146, 171},
238		{18, 11, 7, 63, 144, 171, 4, 4, 246},
239		{35, 27, 10, 146, 174, 171, 12, 26, 128}},
240		{{190, 80, 35, 99, 180, 80, 126, 54, 45},
241		{85, 126, 47, 87, 176, 51, 41, 20, 32},
242		{101, 75, 128, 139, 118, 146, 116, 128, 85},
243		{56, 41, 15, 176, 236, 85, 37, 9, 62},
244		{71, 30, 17, 119, 118, 255, 17, 18, 138},
245		{101, 38, 60, 138, 55, 70, 43, 26, 142},
246		{146, 36, 19, 30, 171, 255, 97, 27, 20},
247		{138, 45, 61, 62, 219, 1, 81, 188, 64},
248		{32, 41, 20, 117, 151, 142, 20, 21, 163},
249		{112, 19, 12, 61, 195, 128, 48, 4, 24}}};
250
251	72.7k	void VP8ResetProba(VP8Proba* const proba) {
252	72.7k	WEBP_UNSAFE_MEMSET(proba->segments, 255u, sizeof(proba->segments));
253		// proba->bands[][] is initialized later
254	72.7k	}
255
256		static void ParseIntraMode(VP8BitReader* const br, VP8Decoder* const dec,
257	1.84M	int mb_x) {
258	1.84M	uint8_t* const top = dec->intra_t + 4 * mb_x;
259	1.84M	uint8_t* const left = dec->intra_l;
260	1.84M	VP8MBData* const block = dec->mb_data + mb_x;
261
262		// Note: we don't save segment map (yet), as we don't expect
263		// to decode more than 1 keyframe.
264	1.84M	if (dec->segment_hdr.update_map) {
265		// Hardcoded tree parsing
266	1.04M	block->segment =
267	1.04M	!VP8GetBit(br, dec->proba.segments[0], "segments")
268	1.04M	? VP8GetBit(br, dec->proba.segments[1], "segments")
269	1.04M	: VP8GetBit(br, dec->proba.segments[2], "segments") + 2;
270	1.04M	} else {
271	799k	block->segment = 0; // default for intra
272	799k	}
273	1.84M	if (dec->use_skip_proba) block->skip = VP8GetBit(br, dec->skip_p, "skip");
274
275	1.84M	block->is_i4x4 = !VP8GetBit(br, 145, "block-size");
276	1.84M	if (!block->is_i4x4) {
277		// Hardcoded 16x16 intra-mode decision tree.
278	707k	const int ymode =
279	707k	VP8GetBit(br, 156, "pred-modes")
280	707k	? (VP8GetBit(br, 128, "pred-modes") ? TM_PRED : H_PRED)
281	707k	: (VP8GetBit(br, 163, "pred-modes") ? V_PRED : DC_PRED);
282	707k	block->imodes[0] = ymode;
283	707k	WEBP_UNSAFE_MEMSET(top, ymode, 4 * sizeof(*top));
284	707k	WEBP_UNSAFE_MEMSET(left, ymode, 4 * sizeof(*left));
285	1.14M	} else {
286	1.14M	uint8_t* modes = block->imodes;
287	1.14M	int y;
288	5.70M	for (y = 0; y < 4; ++y) {
289	4.56M	int ymode = left[y];
290	4.56M	int x;
291	22.8M	for (x = 0; x < 4; ++x) {
292	18.2M	const uint8_t* const prob = kBModesProba[top[x]][ymode];
293	18.2M	#if (USE_GENERIC_TREE == 1)
294		// Generic tree-parsing
295	18.2M	int i = kYModesIntra4[VP8GetBit(br, prob[0], "pred-modes")];
296	29.3M	while (i > 0) {
297	11.1M	i = kYModesIntra4[2 * i + VP8GetBit(br, prob[i], "pred-modes")];
298	11.1M	}
299	18.2M	ymode = -i;
300		#else
301		// Hardcoded tree parsing
302		ymode =
303		!VP8GetBit(br, prob[0], "pred-modes") ? B_DC_PRED
304		: !VP8GetBit(br, prob[1], "pred-modes") ? B_TM_PRED
305		: !VP8GetBit(br, prob[2], "pred-modes") ? B_VE_PRED
306		: !VP8GetBit(br, prob[3], "pred-modes")
307		? (!VP8GetBit(br, prob[4], "pred-modes")
308		? B_HE_PRED
309		: (!VP8GetBit(br, prob[5], "pred-modes") ? B_RD_PRED
310		: B_VR_PRED))
311		: (!VP8GetBit(br, prob[6], "pred-modes")
312		? B_LD_PRED
313		: (!VP8GetBit(br, prob[7], "pred-modes")
314		? B_VL_PRED
315		: (!VP8GetBit(br, prob[8], "pred-modes")
316		? B_HD_PRED
317		: B_HU_PRED)));
318		#endif // USE_GENERIC_TREE
319	18.2M	top[x] = ymode;
320	18.2M	}
321	4.56M	WEBP_UNSAFE_MEMCPY(modes, top, 4 * sizeof(*top));
322	4.56M	modes += 4;
323	4.56M	left[y] = ymode;
324	4.56M	}
325	1.14M	}
326		// Hardcoded UVMode decision tree
327	1.84M	block->uvmode = !VP8GetBit(br, 142, "pred-modes-uv") ? DC_PRED
328	1.84M	: !VP8GetBit(br, 114, "pred-modes-uv") ? V_PRED
329	554k	: VP8GetBit(br, 183, "pred-modes-uv") ? TM_PRED
330	365k	: H_PRED;
331	1.84M	}
332
333	351k	int VP8ParseIntraModeRow(VP8BitReader* const br, VP8Decoder* const dec) {
334	351k	int mb_x;
335	2.20M	for (mb_x = 0; mb_x < dec->mb_w; ++mb_x) {
336	1.84M	ParseIntraMode(br, dec, mb_x);
337	1.84M	}
338	351k	return !dec->br.eof;
339	351k	}
340
341		//------------------------------------------------------------------------------
342		// Paragraph 13
343
344		static const uint8_t
345		CoeffsUpdateProba[NUM_TYPES][NUM_BANDS][NUM_CTX][NUM_PROBAS] = {
346		{{{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
347		{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
348		{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255}},
349		{{176, 246, 255, 255, 255, 255, 255, 255, 255, 255, 255},
350		{223, 241, 252, 255, 255, 255, 255, 255, 255, 255, 255},
351		{249, 253, 253, 255, 255, 255, 255, 255, 255, 255, 255}},
352		{{255, 244, 252, 255, 255, 255, 255, 255, 255, 255, 255},
353		{234, 254, 254, 255, 255, 255, 255, 255, 255, 255, 255},
354		{253, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255}},
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		{{255, 248, 254, 255, 255, 255, 255, 255, 255, 255, 255},
359		{251, 255, 254, 255, 255, 255, 255, 255, 255, 255, 255},
360		{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255}},
361		{{255, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255},
362		{251, 254, 254, 255, 255, 255, 255, 255, 255, 255, 255},
363		{254, 255, 254, 255, 255, 255, 255, 255, 255, 255, 255}},
364		{{255, 254, 253, 255, 254, 255, 255, 255, 255, 255, 255},
365		{250, 255, 254, 255, 254, 255, 255, 255, 255, 255, 255},
366		{254, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255}},
367		{{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
368		{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
369		{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255}}},
370		{{{217, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
371		{225, 252, 241, 253, 255, 255, 254, 255, 255, 255, 255},
372		{234, 250, 241, 250, 253, 255, 253, 254, 255, 255, 255}},
373		{{255, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255},
374		{223, 254, 254, 255, 255, 255, 255, 255, 255, 255, 255},
375		{238, 253, 254, 254, 255, 255, 255, 255, 255, 255, 255}},
376		{{255, 248, 254, 255, 255, 255, 255, 255, 255, 255, 255},
377		{249, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255},
378		{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255}},
379		{{255, 253, 255, 255, 255, 255, 255, 255, 255, 255, 255},
380		{247, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255},
381		{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255}},
382		{{255, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255},
383		{252, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
384		{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255}},
385		{{255, 254, 254, 255, 255, 255, 255, 255, 255, 255, 255},
386		{253, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
387		{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255}},
388		{{255, 254, 253, 255, 255, 255, 255, 255, 255, 255, 255},
389		{250, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
390		{254, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255}},
391		{{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
392		{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
393		{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255}}},
394		{{{186, 251, 250, 255, 255, 255, 255, 255, 255, 255, 255},
395		{234, 251, 244, 254, 255, 255, 255, 255, 255, 255, 255},
396		{251, 251, 243, 253, 254, 255, 254, 255, 255, 255, 255}},
397		{{255, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255},
398		{236, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255},
399		{251, 253, 253, 254, 254, 255, 255, 255, 255, 255, 255}},
400		{{255, 254, 254, 255, 255, 255, 255, 255, 255, 255, 255},
401		{254, 254, 254, 255, 255, 255, 255, 255, 255, 255, 255},
402		{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255}},
403		{{255, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255},
404		{254, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255},
405		{254, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255}},
406		{{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
407		{254, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
408		{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255}},
409		{{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
410		{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
411		{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255}},
412		{{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
413		{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
414		{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255}},
415		{{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
416		{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
417		{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255}}},
418		{{{248, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
419		{250, 254, 252, 254, 255, 255, 255, 255, 255, 255, 255},
420		{248, 254, 249, 253, 255, 255, 255, 255, 255, 255, 255}},
421		{{255, 253, 253, 255, 255, 255, 255, 255, 255, 255, 255},
422		{246, 253, 253, 255, 255, 255, 255, 255, 255, 255, 255},
423		{252, 254, 251, 254, 254, 255, 255, 255, 255, 255, 255}},
424		{{255, 254, 252, 255, 255, 255, 255, 255, 255, 255, 255},
425		{248, 254, 253, 255, 255, 255, 255, 255, 255, 255, 255},
426		{253, 255, 254, 254, 255, 255, 255, 255, 255, 255, 255}},
427		{{255, 251, 254, 255, 255, 255, 255, 255, 255, 255, 255},
428		{245, 251, 254, 255, 255, 255, 255, 255, 255, 255, 255},
429		{253, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255}},
430		{{255, 251, 253, 255, 255, 255, 255, 255, 255, 255, 255},
431		{252, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255},
432		{255, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255}},
433		{{255, 252, 255, 255, 255, 255, 255, 255, 255, 255, 255},
434		{249, 255, 254, 255, 255, 255, 255, 255, 255, 255, 255},
435		{255, 255, 254, 255, 255, 255, 255, 255, 255, 255, 255}},
436		{{255, 255, 253, 255, 255, 255, 255, 255, 255, 255, 255},
437		{250, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
438		{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255}},
439		{{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
440		{254, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255},
441		{255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255}}}};
442
443		// Paragraph 9.9
444
445		static const uint8_t kBands[16 + 1] = {
446		0, 1, 2, 3, 6, 4, 5, 6, 6, 6, 6, 6, 6, 6, 6, 7,
447		0 // extra entry as sentinel
448		};
449
450	69.1k	void VP8ParseProba(VP8BitReader* const br, VP8Decoder* const dec) {
451	69.1k	VP8Proba* const proba = &dec->proba;
452	69.1k	int t, b, c, p;
453	345k	for (t = 0; t < NUM_TYPES; ++t) {
454	2.48M	for (b = 0; b < NUM_BANDS; ++b) {
455	8.84M	for (c = 0; c < NUM_CTX; ++c) {
456	79.6M	for (p = 0; p < NUM_PROBAS; ++p) {
457	72.9M	const int v =
458	72.9M	VP8GetBit(br, CoeffsUpdateProba[t][b][c][p], "global-header")
459	72.9M	? VP8GetValue(br, 8, "global-header")
460	72.9M	: CoeffsProba0[t][b][c][p];
461	72.9M	proba->bands[t][b].probas[c][p] = v;
462	72.9M	}
463	6.63M	}
464	2.21M	}
465	4.97M	for (b = 0; b < 16 + 1; ++b) {
466	4.70M	proba->bands_ptr[t][b] = &proba->bands[t][kBands[b]];
467	4.70M	}
468	276k	}
469	69.1k	dec->use_skip_proba = VP8Get(br, "global-header");
470	69.1k	if (dec->use_skip_proba) {
471	6.22k	dec->skip_p = VP8GetValue(br, 8, "global-header");
472	6.22k	}
473	69.1k	}

Coverage Report

Created: 2026-01-10 06:33