1 // Copyright 2010 Google Inc. All Rights Reserved.
2 //
3 // This code is licensed under the same terms as WebM:
4 // Software License Agreement: http://www.webmproject.org/license/software/
5 // Additional IP Rights Grant: http://www.webmproject.org/license/additional/
6 // -----------------------------------------------------------------------------
7 //
8 // Coding trees and probas
9 //
10 // Author: Skal (pascal.massimino@gmail.com)
11
12 #include "vp8i.h"
13
14 #define USE_GENERIC_TREE
15
16 #if defined(__cplusplus) || defined(c_plusplus)
17 extern "C" {
18 #endif
19
20 #ifdef USE_GENERIC_TREE
21 static const int8_t kYModesIntra4[18] = {
22 -B_DC_PRED, 1,
23 -B_TM_PRED, 2,
24 -B_VE_PRED, 3,
25 4, 6,
26 -B_HE_PRED, 5,
27 -B_RD_PRED, -B_VR_PRED,
28 -B_LD_PRED, 7,
29 -B_VL_PRED, 8,
30 -B_HD_PRED, -B_HU_PRED
31 };
32 #endif
33
34 #ifndef ONLY_KEYFRAME_CODE
35
36 // inter prediction modes
37 enum {
38 LEFT4 = 0, ABOVE4 = 1, ZERO4 = 2, NEW4 = 3,
39 NEARESTMV, NEARMV, ZEROMV, NEWMV, SPLITMV };
40
41 static const int8_t kYModesInter[8] = {
42 -DC_PRED, 1,
43 2, 3,
44 -V_PRED, -H_PRED,
45 -TM_PRED, -B_PRED
46 };
47
48 static const int8_t kMBSplit[6] = {
49 -3, 1,
50 -2, 2,
51 -0, -1
52 };
53
54 static const int8_t kMVRef[8] = {
55 -ZEROMV, 1,
56 -NEARESTMV, 2,
57 -NEARMV, 3,
58 -NEWMV, -SPLITMV
59 };
60
61 static const int8_t kMVRef4[6] = {
62 -LEFT4, 1,
63 -ABOVE4, 2,
64 -ZERO4, -NEW4
65 };
66 #endif
67
68 //------------------------------------------------------------------------------
69 // Default probabilities
70
71 // Inter
72 #ifndef ONLY_KEYFRAME_CODE
73 static const uint8_t kYModeProbaInter0[4] = { 112, 86, 140, 37 };
74 static const uint8_t kUVModeProbaInter0[3] = { 162, 101, 204 };
75 static const uint8_t kMVProba0[2][NUM_MV_PROBAS] = {
76 { 162, 128, 225, 146, 172, 147, 214, 39,
77 156, 128, 129, 132, 75, 145, 178, 206,
78 239, 254, 254 },
79 { 164, 128, 204, 170, 119, 235, 140, 230,
80 228, 128, 130, 130, 74, 148, 180, 203,
81 236, 254, 254 }
82 };
83 #endif
84
85 // Paragraph 13.5
86 static const uint8_t
87 CoeffsProba0[NUM_TYPES][NUM_BANDS][NUM_CTX][NUM_PROBAS] = {
88 // genereated using vp8_default_coef_probs() in entropy.c:129
89 { { { 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128 },
90 { 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128 },
91 { 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128 }
92 },
93 { { 253, 136, 254, 255, 228, 219, 128, 128, 128, 128, 128 },
94 { 189, 129, 242, 255, 227, 213, 255, 219, 128, 128, 128 },
95 { 106, 126, 227, 252, 214, 209, 255, 255, 128, 128, 128 }
96 },
97 { { 1, 98, 248, 255, 236, 226, 255, 255, 128, 128, 128 },
98 { 181, 133, 238, 254, 221, 234, 255, 154, 128, 128, 128 },
99 { 78, 134, 202, 247, 198, 180, 255, 219, 128, 128, 128 },
100 },
101 { { 1, 185, 249, 255, 243, 255, 128, 128, 128, 128, 128 },
102 { 184, 150, 247, 255, 236, 224, 128, 128, 128, 128, 128 },
103 { 77, 110, 216, 255, 236, 230, 128, 128, 128, 128, 128 },
104 },
105 { { 1, 101, 251, 255, 241, 255, 128, 128, 128, 128, 128 },
106 { 170, 139, 241, 252, 236, 209, 255, 255, 128, 128, 128 },
107 { 37, 116, 196, 243, 228, 255, 255, 255, 128, 128, 128 }
108 },
109 { { 1, 204, 254, 255, 245, 255, 128, 128, 128, 128, 128 },
110 { 207, 160, 250, 255, 238, 128, 128, 128, 128, 128, 128 },
111 { 102, 103, 231, 255, 211, 171, 128, 128, 128, 128, 128 }
112 },
113 { { 1, 152, 252, 255, 240, 255, 128, 128, 128, 128, 128 },
114 { 177, 135, 243, 255, 234, 225, 128, 128, 128, 128, 128 },
115 { 80, 129, 211, 255, 194, 224, 128, 128, 128, 128, 128 }
116 },
117 { { 1, 1, 255, 128, 128, 128, 128, 128, 128, 128, 128 },
118 { 246, 1, 255, 128, 128, 128, 128, 128, 128, 128, 128 },
119 { 255, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128 }
120 }
121 },
122 { { { 198, 35, 237, 223, 193, 187, 162, 160, 145, 155, 62 },
123 { 131, 45, 198, 221, 172, 176, 220, 157, 252, 221, 1 },
124 { 68, 47, 146, 208, 149, 167, 221, 162, 255, 223, 128 }
125 },
126 { { 1, 149, 241, 255, 221, 224, 255, 255, 128, 128, 128 },
127 { 184, 141, 234, 253, 222, 220, 255, 199, 128, 128, 128 },
128 { 81, 99, 181, 242, 176, 190, 249, 202, 255, 255, 128 }
129 },
130 { { 1, 129, 232, 253, 214, 197, 242, 196, 255, 255, 128 },
131 { 99, 121, 210, 250, 201, 198, 255, 202, 128, 128, 128 },
132 { 23, 91, 163, 242, 170, 187, 247, 210, 255, 255, 128 }
133 },
134 { { 1, 200, 246, 255, 234, 255, 128, 128, 128, 128, 128 },
135 { 109, 178, 241, 255, 231, 245, 255, 255, 128, 128, 128 },
136 { 44, 130, 201, 253, 205, 192, 255, 255, 128, 128, 128 }
137 },
138 { { 1, 132, 239, 251, 219, 209, 255, 165, 128, 128, 128 },
139 { 94, 136, 225, 251, 218, 190, 255, 255, 128, 128, 128 },
140 { 22, 100, 174, 245, 186, 161, 255, 199, 128, 128, 128 }
141 },
142 { { 1, 182, 249, 255, 232, 235, 128, 128, 128, 128, 128 },
143 { 124, 143, 241, 255, 227, 234, 128, 128, 128, 128, 128 },
144 { 35, 77, 181, 251, 193, 211, 255, 205, 128, 128, 128 }
145 },
146 { { 1, 157, 247, 255, 236, 231, 255, 255, 128, 128, 128 },
147 { 121, 141, 235, 255, 225, 227, 255, 255, 128, 128, 128 },
148 { 45, 99, 188, 251, 195, 217, 255, 224, 128, 128, 128 }
149 },
150 { { 1, 1, 251, 255, 213, 255, 128, 128, 128, 128, 128 },
151 { 203, 1, 248, 255, 255, 128, 128, 128, 128, 128, 128 },
152 { 137, 1, 177, 255, 224, 255, 128, 128, 128, 128, 128 }
153 }
154 },
155 { { { 253, 9, 248, 251, 207, 208, 255, 192, 128, 128, 128 },
156 { 175, 13, 224, 243, 193, 185, 249, 198, 255, 255, 128 },
157 { 73, 17, 171, 221, 161, 179, 236, 167, 255, 234, 128 }
158 },
159 { { 1, 95, 247, 253, 212, 183, 255, 255, 128, 128, 128 },
160 { 239, 90, 244, 250, 211, 209, 255, 255, 128, 128, 128 },
161 { 155, 77, 195, 248, 188, 195, 255, 255, 128, 128, 128 }
162 },
163 { { 1, 24, 239, 251, 218, 219, 255, 205, 128, 128, 128 },
164 { 201, 51, 219, 255, 196, 186, 128, 128, 128, 128, 128 },
165 { 69, 46, 190, 239, 201, 218, 255, 228, 128, 128, 128 }
166 },
167 { { 1, 191, 251, 255, 255, 128, 128, 128, 128, 128, 128 },
168 { 223, 165, 249, 255, 213, 255, 128, 128, 128, 128, 128 },
169 { 141, 124, 248, 255, 255, 128, 128, 128, 128, 128, 128 }
170 },
171 { { 1, 16, 248, 255, 255, 128, 128, 128, 128, 128, 128 },
172 { 190, 36, 230, 255, 236, 255, 128, 128, 128, 128, 128 },
173 { 149, 1, 255, 128, 128, 128, 128, 128, 128, 128, 128 }
174 },
175 { { 1, 226, 255, 128, 128, 128, 128, 128, 128, 128, 128 },
176 { 247, 192, 255, 128, 128, 128, 128, 128, 128, 128, 128 },
177 { 240, 128, 255, 128, 128, 128, 128, 128, 128, 128, 128 }
178 },
179 { { 1, 134, 252, 255, 255, 128, 128, 128, 128, 128, 128 },
180 { 213, 62, 250, 255, 255, 128, 128, 128, 128, 128, 128 },
181 { 55, 93, 255, 128, 128, 128, 128, 128, 128, 128, 128 }
182 },
183 { { 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128 },
184 { 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128 },
185 { 128, 128, 128, 128, 128, 128, 128, 128, 128, 128, 128 }
186 }
187 },
188 { { { 202, 24, 213, 235, 186, 191, 220, 160, 240, 175, 255 },
189 { 126, 38, 182, 232, 169, 184, 228, 174, 255, 187, 128 },
190 { 61, 46, 138, 219, 151, 178, 240, 170, 255, 216, 128 }
191 },
192 { { 1, 112, 230, 250, 199, 191, 247, 159, 255, 255, 128 },
193 { 166, 109, 228, 252, 211, 215, 255, 174, 128, 128, 128 },
194 { 39, 77, 162, 232, 172, 180, 245, 178, 255, 255, 128 }
195 },
196 { { 1, 52, 220, 246, 198, 199, 249, 220, 255, 255, 128 },
197 { 124, 74, 191, 243, 183, 193, 250, 221, 255, 255, 128 },
198 { 24, 71, 130, 219, 154, 170, 243, 182, 255, 255, 128 }
199 },
200 { { 1, 182, 225, 249, 219, 240, 255, 224, 128, 128, 128 },
201 { 149, 150, 226, 252, 216, 205, 255, 171, 128, 128, 128 },
202 { 28, 108, 170, 242, 183, 194, 254, 223, 255, 255, 128 }
203 },
204 { { 1, 81, 230, 252, 204, 203, 255, 192, 128, 128, 128 },
205 { 123, 102, 209, 247, 188, 196, 255, 233, 128, 128, 128 },
206 { 20, 95, 153, 243, 164, 173, 255, 203, 128, 128, 128 }
207 },
208 { { 1, 222, 248, 255, 216, 213, 128, 128, 128, 128, 128 },
209 { 168, 175, 246, 252, 235, 205, 255, 255, 128, 128, 128 },
210 { 47, 116, 215, 255, 211, 212, 255, 255, 128, 128, 128 }
211 },
212 { { 1, 121, 236, 253, 212, 214, 255, 255, 128, 128, 128 },
213 { 141, 84, 213, 252, 201, 202, 255, 219, 128, 128, 128 },
214 { 42, 80, 160, 240, 162, 185, 255, 205, 128, 128, 128 }
215 },
216 { { 1, 1, 255, 128, 128, 128, 128, 128, 128, 128, 128 },
217 { 244, 1, 255, 128, 128, 128, 128, 128, 128, 128, 128 },
218 { 238, 1, 255, 128, 128, 128, 128, 128, 128, 128, 128 }
219 }
220 }
221 };
222
223 // Paragraph 11.5
224 static const uint8_t kBModesProba[NUM_BMODES][NUM_BMODES][NUM_BMODES - 1] = {
225 { { 231, 120, 48, 89, 115, 113, 120, 152, 112 },
226 { 152, 179, 64, 126, 170, 118, 46, 70, 95 },
227 { 175, 69, 143, 80, 85, 82, 72, 155, 103 },
228 { 56, 58, 10, 171, 218, 189, 17, 13, 152 },
229 { 114, 26, 17, 163, 44, 195, 21, 10, 173 },
230 { 121, 24, 80, 195, 26, 62, 44, 64, 85 },
231 { 144, 71, 10, 38, 171, 213, 144, 34, 26 },
232 { 170, 46, 55, 19, 136, 160, 33, 206, 71 },
233 { 63, 20, 8, 114, 114, 208, 12, 9, 226 },
234 { 81, 40, 11, 96, 182, 84, 29, 16, 36 } },
235 { { 134, 183, 89, 137, 98, 101, 106, 165, 148 },
236 { 72, 187, 100, 130, 157, 111, 32, 75, 80 },
237 { 66, 102, 167, 99, 74, 62, 40, 234, 128 },
238 { 41, 53, 9, 178, 241, 141, 26, 8, 107 },
239 { 74, 43, 26, 146, 73, 166, 49, 23, 157 },
240 { 65, 38, 105, 160, 51, 52, 31, 115, 128 },
241 { 104, 79, 12, 27, 217, 255, 87, 17, 7 },
242 { 87, 68, 71, 44, 114, 51, 15, 186, 23 },
243 { 47, 41, 14, 110, 182, 183, 21, 17, 194 },
244 { 66, 45, 25, 102, 197, 189, 23, 18, 22 } },
245 { { 88, 88, 147, 150, 42, 46, 45, 196, 205 },
246 { 43, 97, 183, 117, 85, 38, 35, 179, 61 },
247 { 39, 53, 200, 87, 26, 21, 43, 232, 171 },
248 { 56, 34, 51, 104, 114, 102, 29, 93, 77 },
249 { 39, 28, 85, 171, 58, 165, 90, 98, 64 },
250 { 34, 22, 116, 206, 23, 34, 43, 166, 73 },
251 { 107, 54, 32, 26, 51, 1, 81, 43, 31 },
252 { 68, 25, 106, 22, 64, 171, 36, 225, 114 },
253 { 34, 19, 21, 102, 132, 188, 16, 76, 124 },
254 { 62, 18, 78, 95, 85, 57, 50, 48, 51 } },
255 { { 193, 101, 35, 159, 215, 111, 89, 46, 111 },
256 { 60, 148, 31, 172, 219, 228, 21, 18, 111 },
257 { 112, 113, 77, 85, 179, 255, 38, 120, 114 },
258 { 40, 42, 1, 196, 245, 209, 10, 25, 109 },
259 { 88, 43, 29, 140, 166, 213, 37, 43, 154 },
260 { 61, 63, 30, 155, 67, 45, 68, 1, 209 },
261 { 100, 80, 8, 43, 154, 1, 51, 26, 71 },
262 { 142, 78, 78, 16, 255, 128, 34, 197, 171 },
263 { 41, 40, 5, 102, 211, 183, 4, 1, 221 },
264 { 51, 50, 17, 168, 209, 192, 23, 25, 82 } },
265 { { 138, 31, 36, 171, 27, 166, 38, 44, 229 },
266 { 67, 87, 58, 169, 82, 115, 26, 59, 179 },
267 { 63, 59, 90, 180, 59, 166, 93, 73, 154 },
268 { 40, 40, 21, 116, 143, 209, 34, 39, 175 },
269 { 47, 15, 16, 183, 34, 223, 49, 45, 183 },
270 { 46, 17, 33, 183, 6, 98, 15, 32, 183 },
271 { 57, 46, 22, 24, 128, 1, 54, 17, 37 },
272 { 65, 32, 73, 115, 28, 128, 23, 128, 205 },
273 { 40, 3, 9, 115, 51, 192, 18, 6, 223 },
274 { 87, 37, 9, 115, 59, 77, 64, 21, 47 } },
275 { { 104, 55, 44, 218, 9, 54, 53, 130, 226 },
276 { 64, 90, 70, 205, 40, 41, 23, 26, 57 },
277 { 54, 57, 112, 184, 5, 41, 38, 166, 213 },
278 { 30, 34, 26, 133, 152, 116, 10, 32, 134 },
279 { 39, 19, 53, 221, 26, 114, 32, 73, 255 },
280 { 31, 9, 65, 234, 2, 15, 1, 118, 73 },
281 { 75, 32, 12, 51, 192, 255, 160, 43, 51 },
282 { 88, 31, 35, 67, 102, 85, 55, 186, 85 },
283 { 56, 21, 23, 111, 59, 205, 45, 37, 192 },
284 { 55, 38, 70, 124, 73, 102, 1, 34, 98 } },
285 { { 125, 98, 42, 88, 104, 85, 117, 175, 82 },
286 { 95, 84, 53, 89, 128, 100, 113, 101, 45 },
287 { 75, 79, 123, 47, 51, 128, 81, 171, 1 },
288 { 57, 17, 5, 71, 102, 57, 53, 41, 49 },
289 { 38, 33, 13, 121, 57, 73, 26, 1, 85 },
290 { 41, 10, 67, 138, 77, 110, 90, 47, 114 },
291 { 115, 21, 2, 10, 102, 255, 166, 23, 6 },
292 { 101, 29, 16, 10, 85, 128, 101, 196, 26 },
293 { 57, 18, 10, 102, 102, 213, 34, 20, 43 },
294 { 117, 20, 15, 36, 163, 128, 68, 1, 26 } },
295 { { 102, 61, 71, 37, 34, 53, 31, 243, 192 },
296 { 69, 60, 71, 38, 73, 119, 28, 222, 37 },
297 { 68, 45, 128, 34, 1, 47, 11, 245, 171 },
298 { 62, 17, 19, 70, 146, 85, 55, 62, 70 },
299 { 37, 43, 37, 154, 100, 163, 85, 160, 1 },
300 { 63, 9, 92, 136, 28, 64, 32, 201, 85 },
301 { 75, 15, 9, 9, 64, 255, 184, 119, 16 },
302 { 86, 6, 28, 5, 64, 255, 25, 248, 1 },
303 { 56, 8, 17, 132, 137, 255, 55, 116, 128 },
304 { 58, 15, 20, 82, 135, 57, 26, 121, 40 } },
305 { { 164, 50, 31, 137, 154, 133, 25, 35, 218 },
306 { 51, 103, 44, 131, 131, 123, 31, 6, 158 },
307 { 86, 40, 64, 135, 148, 224, 45, 183, 128 },
308 { 22, 26, 17, 131, 240, 154, 14, 1, 209 },
309 { 45, 16, 21, 91, 64, 222, 7, 1, 197 },
310 { 56, 21, 39, 155, 60, 138, 23, 102, 213 },
311 { 83, 12, 13, 54, 192, 255, 68, 47, 28 },
312 { 85, 26, 85, 85, 128, 128, 32, 146, 171 },
313 { 18, 11, 7, 63, 144, 171, 4, 4, 246 },
314 { 35, 27, 10, 146, 174, 171, 12, 26, 128 } },
315 { { 190, 80, 35, 99, 180, 80, 126, 54, 45 },
316 { 85, 126, 47, 87, 176, 51, 41, 20, 32 },
317 { 101, 75, 128, 139, 118, 146, 116, 128, 85 },
318 { 56, 41, 15, 176, 236, 85, 37, 9, 62 },
319 { 71, 30, 17, 119, 118, 255, 17, 18, 138 },
320 { 101, 38, 60, 138, 55, 70, 43, 26, 142 },
321 { 146, 36, 19, 30, 171, 255, 97, 27, 20 },
322 { 138, 45, 61, 62, 219, 1, 81, 188, 64 },
323 { 32, 41, 20, 117, 151, 142, 20, 21, 163 },
324 { 112, 19, 12, 61, 195, 128, 48, 4, 24 } }
325 };
326
VP8ResetProba(VP8Proba * const proba)327 void VP8ResetProba(VP8Proba* const proba) {
328 memset(proba->segments_, 255u, sizeof(proba->segments_));
329 memcpy(proba->coeffs_, CoeffsProba0, sizeof(CoeffsProba0));
330 #ifndef ONLY_KEYFRAME_CODE
331 memcpy(proba->mv_, kMVProba0, sizeof(kMVProba0));
332 memcpy(proba->ymode_, kYModeProbaInter0, sizeof(kYModeProbaInter0));
333 memcpy(proba->uvmode_, kUVModeProbaInter0, sizeof(kUVModeProbaInter0));
334 #endif
335 }
336
VP8ParseIntraMode(VP8BitReader * const br,VP8Decoder * const dec)337 void VP8ParseIntraMode(VP8BitReader* const br, VP8Decoder* const dec) {
338 uint8_t* const top = dec->intra_t_ + 4 * dec->mb_x_;
339 uint8_t* const left = dec->intra_l_;
340 // Hardcoded 16x16 intra-mode decision tree.
341 dec->is_i4x4_ = !VP8GetBit(br, 145); // decide for B_PRED first
342 if (!dec->is_i4x4_) {
343 const int ymode =
344 VP8GetBit(br, 156) ? (VP8GetBit(br, 128) ? TM_PRED : H_PRED)
345 : (VP8GetBit(br, 163) ? V_PRED : DC_PRED);
346 dec->imodes_[0] = ymode;
347 memset(top, ymode, 4 * sizeof(top[0]));
348 memset(left, ymode, 4 * sizeof(left[0]));
349 } else {
350 uint8_t* modes = dec->imodes_;
351 int y;
352 for (y = 0; y < 4; ++y) {
353 int ymode = left[y];
354 int x;
355 for (x = 0; x < 4; ++x) {
356 const uint8_t* const prob = kBModesProba[top[x]][ymode];
357 #ifdef USE_GENERIC_TREE
358 // Generic tree-parsing
359 int i = 0;
360 do {
361 i = kYModesIntra4[2 * i + VP8GetBit(br, prob[i])];
362 } while (i > 0);
363 ymode = -i;
364 #else
365 // Hardcoded tree parsing
366 ymode = !VP8GetBit(br, prob[0]) ? B_DC_PRED :
367 !VP8GetBit(br, prob[1]) ? B_TM_PRED :
368 !VP8GetBit(br, prob[2]) ? B_VE_PRED :
369 !VP8GetBit(br, prob[3]) ?
370 (!VP8GetBit(br, prob[4]) ? B_HE_PRED :
371 (!VP8GetBit(br, prob[5]) ? B_RD_PRED : B_VR_PRED)) :
372 (!VP8GetBit(br, prob[6]) ? B_LD_PRED :
373 (!VP8GetBit(br, prob[7]) ? B_VL_PRED :
374 (!VP8GetBit(br, prob[8]) ? B_HD_PRED : B_HU_PRED)));
375 #endif // USE_GENERIC_TREE
376 top[x] = ymode;
377 *modes++ = ymode;
378 }
379 left[y] = ymode;
380 }
381 }
382 // Hardcoded UVMode decision tree
383 dec->uvmode_ = !VP8GetBit(br, 142) ? DC_PRED
384 : !VP8GetBit(br, 114) ? V_PRED
385 : VP8GetBit(br, 183) ? TM_PRED : H_PRED;
386 }
387
388 //------------------------------------------------------------------------------
389 // Paragraph 13
390
391 static const uint8_t
392 CoeffsUpdateProba[NUM_TYPES][NUM_BANDS][NUM_CTX][NUM_PROBAS] = {
393 { { { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 },
394 { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 },
395 { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }
396 },
397 { { 176, 246, 255, 255, 255, 255, 255, 255, 255, 255, 255 },
398 { 223, 241, 252, 255, 255, 255, 255, 255, 255, 255, 255 },
399 { 249, 253, 253, 255, 255, 255, 255, 255, 255, 255, 255 }
400 },
401 { { 255, 244, 252, 255, 255, 255, 255, 255, 255, 255, 255 },
402 { 234, 254, 254, 255, 255, 255, 255, 255, 255, 255, 255 },
403 { 253, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }
404 },
405 { { 255, 246, 254, 255, 255, 255, 255, 255, 255, 255, 255 },
406 { 239, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255 },
407 { 254, 255, 254, 255, 255, 255, 255, 255, 255, 255, 255 }
408 },
409 { { 255, 248, 254, 255, 255, 255, 255, 255, 255, 255, 255 },
410 { 251, 255, 254, 255, 255, 255, 255, 255, 255, 255, 255 },
411 { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }
412 },
413 { { 255, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255 },
414 { 251, 254, 254, 255, 255, 255, 255, 255, 255, 255, 255 },
415 { 254, 255, 254, 255, 255, 255, 255, 255, 255, 255, 255 }
416 },
417 { { 255, 254, 253, 255, 254, 255, 255, 255, 255, 255, 255 },
418 { 250, 255, 254, 255, 254, 255, 255, 255, 255, 255, 255 },
419 { 254, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }
420 },
421 { { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 },
422 { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 },
423 { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }
424 }
425 },
426 { { { 217, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 },
427 { 225, 252, 241, 253, 255, 255, 254, 255, 255, 255, 255 },
428 { 234, 250, 241, 250, 253, 255, 253, 254, 255, 255, 255 }
429 },
430 { { 255, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255 },
431 { 223, 254, 254, 255, 255, 255, 255, 255, 255, 255, 255 },
432 { 238, 253, 254, 254, 255, 255, 255, 255, 255, 255, 255 }
433 },
434 { { 255, 248, 254, 255, 255, 255, 255, 255, 255, 255, 255 },
435 { 249, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255 },
436 { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }
437 },
438 { { 255, 253, 255, 255, 255, 255, 255, 255, 255, 255, 255 },
439 { 247, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255 },
440 { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }
441 },
442 { { 255, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255 },
443 { 252, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 },
444 { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }
445 },
446 { { 255, 254, 254, 255, 255, 255, 255, 255, 255, 255, 255 },
447 { 253, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 },
448 { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }
449 },
450 { { 255, 254, 253, 255, 255, 255, 255, 255, 255, 255, 255 },
451 { 250, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 },
452 { 254, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }
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 { { { 186, 251, 250, 255, 255, 255, 255, 255, 255, 255, 255 },
460 { 234, 251, 244, 254, 255, 255, 255, 255, 255, 255, 255 },
461 { 251, 251, 243, 253, 254, 255, 254, 255, 255, 255, 255 }
462 },
463 { { 255, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255 },
464 { 236, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255 },
465 { 251, 253, 253, 254, 254, 255, 255, 255, 255, 255, 255 }
466 },
467 { { 255, 254, 254, 255, 255, 255, 255, 255, 255, 255, 255 },
468 { 254, 254, 254, 255, 255, 255, 255, 255, 255, 255, 255 },
469 { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }
470 },
471 { { 255, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255 },
472 { 254, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255 },
473 { 254, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }
474 },
475 { { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 },
476 { 254, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 },
477 { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }
478 },
479 { { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 },
480 { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 },
481 { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }
482 },
483 { { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 },
484 { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 },
485 { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }
486 },
487 { { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 },
488 { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 },
489 { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }
490 }
491 },
492 { { { 248, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 },
493 { 250, 254, 252, 254, 255, 255, 255, 255, 255, 255, 255 },
494 { 248, 254, 249, 253, 255, 255, 255, 255, 255, 255, 255 }
495 },
496 { { 255, 253, 253, 255, 255, 255, 255, 255, 255, 255, 255 },
497 { 246, 253, 253, 255, 255, 255, 255, 255, 255, 255, 255 },
498 { 252, 254, 251, 254, 254, 255, 255, 255, 255, 255, 255 }
499 },
500 { { 255, 254, 252, 255, 255, 255, 255, 255, 255, 255, 255 },
501 { 248, 254, 253, 255, 255, 255, 255, 255, 255, 255, 255 },
502 { 253, 255, 254, 254, 255, 255, 255, 255, 255, 255, 255 }
503 },
504 { { 255, 251, 254, 255, 255, 255, 255, 255, 255, 255, 255 },
505 { 245, 251, 254, 255, 255, 255, 255, 255, 255, 255, 255 },
506 { 253, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255 }
507 },
508 { { 255, 251, 253, 255, 255, 255, 255, 255, 255, 255, 255 },
509 { 252, 253, 254, 255, 255, 255, 255, 255, 255, 255, 255 },
510 { 255, 254, 255, 255, 255, 255, 255, 255, 255, 255, 255 }
511 },
512 { { 255, 252, 255, 255, 255, 255, 255, 255, 255, 255, 255 },
513 { 249, 255, 254, 255, 255, 255, 255, 255, 255, 255, 255 },
514 { 255, 255, 254, 255, 255, 255, 255, 255, 255, 255, 255 }
515 },
516 { { 255, 255, 253, 255, 255, 255, 255, 255, 255, 255, 255 },
517 { 250, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 },
518 { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }
519 },
520 { { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 },
521 { 254, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 },
522 { 255, 255, 255, 255, 255, 255, 255, 255, 255, 255, 255 }
523 }
524 }
525 };
526
527 #ifndef ONLY_KEYFRAME_CODE
528 static const uint8_t MVUpdateProba[2][NUM_MV_PROBAS] = {
529 { 237, 246, 253, 253, 254, 254, 254, 254,
530 254, 254, 254, 254, 254, 254, 250, 250,
531 252, 254, 254 },
532 { 231, 243, 245, 253, 254, 254, 254, 254,
533 254, 254, 254, 254, 254, 254, 251, 251,
534 254, 254, 254 }
535 };
536 #endif
537
538 // Paragraph 9.9
VP8ParseProba(VP8BitReader * const br,VP8Decoder * const dec)539 void VP8ParseProba(VP8BitReader* const br, VP8Decoder* const dec) {
540 VP8Proba* const proba = &dec->proba_;
541 int t, b, c, p;
542 for (t = 0; t < NUM_TYPES; ++t) {
543 for (b = 0; b < NUM_BANDS; ++b) {
544 for (c = 0; c < NUM_CTX; ++c) {
545 for (p = 0; p < NUM_PROBAS; ++p) {
546 if (VP8GetBit(br, CoeffsUpdateProba[t][b][c][p])) {
547 proba->coeffs_[t][b][c][p] = VP8GetValue(br, 8);
548 }
549 }
550 }
551 }
552 }
553 dec->use_skip_proba_ = VP8Get(br);
554 if (dec->use_skip_proba_) {
555 dec->skip_p_ = VP8GetValue(br, 8);
556 }
557 #ifndef ONLY_KEYFRAME_CODE
558 if (!dec->frm_hdr_.key_frame_) {
559 int i;
560 dec->intra_p_ = VP8GetValue(br, 8);
561 dec->last_p_ = VP8GetValue(br, 8);
562 dec->golden_p_ = VP8GetValue(br, 8);
563 if (VP8Get(br)) { // update y-mode
564 for (i = 0; i < 4; ++i) {
565 proba->ymode_[i] = VP8GetValue(br, 8);
566 }
567 }
568 if (VP8Get(br)) { // update uv-mode
569 for (i = 0; i < 3; ++i) {
570 proba->uvmode_[i] = VP8GetValue(br, 8);
571 }
572 }
573 // update MV
574 for (i = 0; i < 2; ++i) {
575 int k;
576 for (k = 0; k < NUM_MV_PROBAS; ++k) {
577 if (VP8GetBit(br, MVUpdateProba[i][k])) {
578 const int v = VP8GetValue(br, 7);
579 proba->mv_[i][k] = v ? v << 1 : 1;
580 }
581 }
582 }
583 }
584 #endif
585 }
586
587 #if defined(__cplusplus) || defined(c_plusplus)
588 } // extern "C"
589 #endif
590