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vp9prob.c
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1 /*
2  * VP9 compatible video decoder
3  *
4  * Copyright (C) 2013 Ronald S. Bultje <rsbultje gmail com>
5  * Copyright (C) 2013 Clément Bœsch <u pkh me>
6  *
7  * This file is part of FFmpeg.
8  *
9  * FFmpeg is free software; you can redistribute it and/or
10  * modify it under the terms of the GNU Lesser General Public
11  * License as published by the Free Software Foundation; either
12  * version 2.1 of the License, or (at your option) any later version.
13  *
14  * FFmpeg is distributed in the hope that it will be useful,
15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17  * Lesser General Public License for more details.
18  *
19  * You should have received a copy of the GNU Lesser General Public
20  * License along with FFmpeg; if not, write to the Free Software
21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22  */
23 
24 #include "vp56.h"
25 #include "vp9.h"
26 #include "vp9data.h"
27 #include "vp9dec.h"
28 
29 static av_always_inline void adapt_prob(uint8_t *p, unsigned ct0, unsigned ct1,
30  int max_count, int update_factor)
31 {
32  unsigned ct = ct0 + ct1, p2, p1;
33 
34  if (!ct)
35  return;
36 
37  update_factor = FASTDIV(update_factor * FFMIN(ct, max_count), max_count);
38  p1 = *p;
39  p2 = ((((int64_t) ct0) << 8) + (ct >> 1)) / ct;
40  p2 = av_clip(p2, 1, 255);
41 
42  // (p1 * (256 - update_factor) + p2 * update_factor + 128) >> 8
43  *p = p1 + (((p2 - p1) * update_factor + 128) >> 8);
44 }
45 
46 void ff_vp9_adapt_probs(VP9Context *s)
47 {
48  int i, j, k, l, m;
49  ProbContext *p = &s->prob_ctx[s->s.h.framectxid].p;
50  int uf = (s->s.h.keyframe || s->s.h.intraonly || !s->last_keyframe) ? 112 : 128;
51 
52  // coefficients
53  for (i = 0; i < 4; i++)
54  for (j = 0; j < 2; j++)
55  for (k = 0; k < 2; k++)
56  for (l = 0; l < 6; l++)
57  for (m = 0; m < 6; m++) {
58  uint8_t *pp = s->prob_ctx[s->s.h.framectxid].coef[i][j][k][l][m];
59  unsigned *e = s->td[0].counts.eob[i][j][k][l][m];
60  unsigned *c = s->td[0].counts.coef[i][j][k][l][m];
61 
62  if (l == 0 && m >= 3) // dc only has 3 pt
63  break;
64 
65  adapt_prob(&pp[0], e[0], e[1], 24, uf);
66  adapt_prob(&pp[1], c[0], c[1] + c[2], 24, uf);
67  adapt_prob(&pp[2], c[1], c[2], 24, uf);
68  }
69 
70  if (s->s.h.keyframe || s->s.h.intraonly) {
71  memcpy(p->skip, s->prob.p.skip, sizeof(p->skip));
72  memcpy(p->tx32p, s->prob.p.tx32p, sizeof(p->tx32p));
73  memcpy(p->tx16p, s->prob.p.tx16p, sizeof(p->tx16p));
74  memcpy(p->tx8p, s->prob.p.tx8p, sizeof(p->tx8p));
75  return;
76  }
77 
78  // skip flag
79  for (i = 0; i < 3; i++)
80  adapt_prob(&p->skip[i], s->td[0].counts.skip[i][0],
81  s->td[0].counts.skip[i][1], 20, 128);
82 
83  // intra/inter flag
84  for (i = 0; i < 4; i++)
85  adapt_prob(&p->intra[i], s->td[0].counts.intra[i][0],
86  s->td[0].counts.intra[i][1], 20, 128);
87 
88  // comppred flag
89  if (s->s.h.comppredmode == PRED_SWITCHABLE) {
90  for (i = 0; i < 5; i++)
91  adapt_prob(&p->comp[i], s->td[0].counts.comp[i][0],
92  s->td[0].counts.comp[i][1], 20, 128);
93  }
94 
95  // reference frames
96  if (s->s.h.comppredmode != PRED_SINGLEREF) {
97  for (i = 0; i < 5; i++)
98  adapt_prob(&p->comp_ref[i], s->td[0].counts.comp_ref[i][0],
99  s->td[0].counts.comp_ref[i][1], 20, 128);
100  }
101 
102  if (s->s.h.comppredmode != PRED_COMPREF) {
103  for (i = 0; i < 5; i++) {
104  uint8_t *pp = p->single_ref[i];
105  unsigned (*c)[2] = s->td[0].counts.single_ref[i];
106 
107  adapt_prob(&pp[0], c[0][0], c[0][1], 20, 128);
108  adapt_prob(&pp[1], c[1][0], c[1][1], 20, 128);
109  }
110  }
111 
112  // block partitioning
113  for (i = 0; i < 4; i++)
114  for (j = 0; j < 4; j++) {
115  uint8_t *pp = p->partition[i][j];
116  unsigned *c = s->td[0].counts.partition[i][j];
117 
118  adapt_prob(&pp[0], c[0], c[1] + c[2] + c[3], 20, 128);
119  adapt_prob(&pp[1], c[1], c[2] + c[3], 20, 128);
120  adapt_prob(&pp[2], c[2], c[3], 20, 128);
121  }
122 
123  // tx size
124  if (s->s.h.txfmmode == TX_SWITCHABLE) {
125  for (i = 0; i < 2; i++) {
126  unsigned *c16 = s->td[0].counts.tx16p[i], *c32 = s->td[0].counts.tx32p[i];
127 
128  adapt_prob(&p->tx8p[i], s->td[0].counts.tx8p[i][0],
129  s->td[0].counts.tx8p[i][1], 20, 128);
130  adapt_prob(&p->tx16p[i][0], c16[0], c16[1] + c16[2], 20, 128);
131  adapt_prob(&p->tx16p[i][1], c16[1], c16[2], 20, 128);
132  adapt_prob(&p->tx32p[i][0], c32[0], c32[1] + c32[2] + c32[3], 20, 128);
133  adapt_prob(&p->tx32p[i][1], c32[1], c32[2] + c32[3], 20, 128);
134  adapt_prob(&p->tx32p[i][2], c32[2], c32[3], 20, 128);
135  }
136  }
137 
138  // interpolation filter
139  if (s->s.h.filtermode == FILTER_SWITCHABLE) {
140  for (i = 0; i < 4; i++) {
141  uint8_t *pp = p->filter[i];
142  unsigned *c = s->td[0].counts.filter[i];
143 
144  adapt_prob(&pp[0], c[0], c[1] + c[2], 20, 128);
145  adapt_prob(&pp[1], c[1], c[2], 20, 128);
146  }
147  }
148 
149  // inter modes
150  for (i = 0; i < 7; i++) {
151  uint8_t *pp = p->mv_mode[i];
152  unsigned *c = s->td[0].counts.mv_mode[i];
153 
154  adapt_prob(&pp[0], c[2], c[1] + c[0] + c[3], 20, 128);
155  adapt_prob(&pp[1], c[0], c[1] + c[3], 20, 128);
156  adapt_prob(&pp[2], c[1], c[3], 20, 128);
157  }
158 
159  // mv joints
160  {
161  uint8_t *pp = p->mv_joint;
162  unsigned *c = s->td[0].counts.mv_joint;
163 
164  adapt_prob(&pp[0], c[0], c[1] + c[2] + c[3], 20, 128);
165  adapt_prob(&pp[1], c[1], c[2] + c[3], 20, 128);
166  adapt_prob(&pp[2], c[2], c[3], 20, 128);
167  }
168 
169  // mv components
170  for (i = 0; i < 2; i++) {
171  uint8_t *pp;
172  unsigned *c, (*c2)[2], sum;
173 
174  adapt_prob(&p->mv_comp[i].sign, s->td[0].counts.mv_comp[i].sign[0],
175  s->td[0].counts.mv_comp[i].sign[1], 20, 128);
176 
177  pp = p->mv_comp[i].classes;
178  c = s->td[0].counts.mv_comp[i].classes;
179  sum = c[1] + c[2] + c[3] + c[4] + c[5] +
180  c[6] + c[7] + c[8] + c[9] + c[10];
181  adapt_prob(&pp[0], c[0], sum, 20, 128);
182  sum -= c[1];
183  adapt_prob(&pp[1], c[1], sum, 20, 128);
184  sum -= c[2] + c[3];
185  adapt_prob(&pp[2], c[2] + c[3], sum, 20, 128);
186  adapt_prob(&pp[3], c[2], c[3], 20, 128);
187  sum -= c[4] + c[5];
188  adapt_prob(&pp[4], c[4] + c[5], sum, 20, 128);
189  adapt_prob(&pp[5], c[4], c[5], 20, 128);
190  sum -= c[6];
191  adapt_prob(&pp[6], c[6], sum, 20, 128);
192  adapt_prob(&pp[7], c[7] + c[8], c[9] + c[10], 20, 128);
193  adapt_prob(&pp[8], c[7], c[8], 20, 128);
194  adapt_prob(&pp[9], c[9], c[10], 20, 128);
195 
196  adapt_prob(&p->mv_comp[i].class0, s->td[0].counts.mv_comp[i].class0[0],
197  s->td[0].counts.mv_comp[i].class0[1], 20, 128);
198  pp = p->mv_comp[i].bits;
199  c2 = s->td[0].counts.mv_comp[i].bits;
200  for (j = 0; j < 10; j++)
201  adapt_prob(&pp[j], c2[j][0], c2[j][1], 20, 128);
202 
203  for (j = 0; j < 2; j++) {
204  pp = p->mv_comp[i].class0_fp[j];
205  c = s->td[0].counts.mv_comp[i].class0_fp[j];
206  adapt_prob(&pp[0], c[0], c[1] + c[2] + c[3], 20, 128);
207  adapt_prob(&pp[1], c[1], c[2] + c[3], 20, 128);
208  adapt_prob(&pp[2], c[2], c[3], 20, 128);
209  }
210  pp = p->mv_comp[i].fp;
211  c = s->td[0].counts.mv_comp[i].fp;
212  adapt_prob(&pp[0], c[0], c[1] + c[2] + c[3], 20, 128);
213  adapt_prob(&pp[1], c[1], c[2] + c[3], 20, 128);
214  adapt_prob(&pp[2], c[2], c[3], 20, 128);
215 
216  if (s->s.h.highprecisionmvs) {
217  adapt_prob(&p->mv_comp[i].class0_hp,
218  s->td[0].counts.mv_comp[i].class0_hp[0],
219  s->td[0].counts.mv_comp[i].class0_hp[1], 20, 128);
220  adapt_prob(&p->mv_comp[i].hp, s->td[0].counts.mv_comp[i].hp[0],
221  s->td[0].counts.mv_comp[i].hp[1], 20, 128);
222  }
223  }
224 
225  // y intra modes
226  for (i = 0; i < 4; i++) {
227  uint8_t *pp = p->y_mode[i];
228  unsigned *c = s->td[0].counts.y_mode[i], sum, s2;
229 
230  sum = c[0] + c[1] + c[3] + c[4] + c[5] + c[6] + c[7] + c[8] + c[9];
231  adapt_prob(&pp[0], c[DC_PRED], sum, 20, 128);
232  sum -= c[TM_VP8_PRED];
233  adapt_prob(&pp[1], c[TM_VP8_PRED], sum, 20, 128);
234  sum -= c[VERT_PRED];
235  adapt_prob(&pp[2], c[VERT_PRED], sum, 20, 128);
236  s2 = c[HOR_PRED] + c[DIAG_DOWN_RIGHT_PRED] + c[VERT_RIGHT_PRED];
237  sum -= s2;
238  adapt_prob(&pp[3], s2, sum, 20, 128);
239  s2 -= c[HOR_PRED];
240  adapt_prob(&pp[4], c[HOR_PRED], s2, 20, 128);
241  adapt_prob(&pp[5], c[DIAG_DOWN_RIGHT_PRED], c[VERT_RIGHT_PRED],
242  20, 128);
243  sum -= c[DIAG_DOWN_LEFT_PRED];
244  adapt_prob(&pp[6], c[DIAG_DOWN_LEFT_PRED], sum, 20, 128);
245  sum -= c[VERT_LEFT_PRED];
246  adapt_prob(&pp[7], c[VERT_LEFT_PRED], sum, 20, 128);
247  adapt_prob(&pp[8], c[HOR_DOWN_PRED], c[HOR_UP_PRED], 20, 128);
248  }
249 
250  // uv intra modes
251  for (i = 0; i < 10; i++) {
252  uint8_t *pp = p->uv_mode[i];
253  unsigned *c = s->td[0].counts.uv_mode[i], sum, s2;
254 
255  sum = c[0] + c[1] + c[3] + c[4] + c[5] + c[6] + c[7] + c[8] + c[9];
256  adapt_prob(&pp[0], c[DC_PRED], sum, 20, 128);
257  sum -= c[TM_VP8_PRED];
258  adapt_prob(&pp[1], c[TM_VP8_PRED], sum, 20, 128);
259  sum -= c[VERT_PRED];
260  adapt_prob(&pp[2], c[VERT_PRED], sum, 20, 128);
261  s2 = c[HOR_PRED] + c[DIAG_DOWN_RIGHT_PRED] + c[VERT_RIGHT_PRED];
262  sum -= s2;
263  adapt_prob(&pp[3], s2, sum, 20, 128);
264  s2 -= c[HOR_PRED];
265  adapt_prob(&pp[4], c[HOR_PRED], s2, 20, 128);
266  adapt_prob(&pp[5], c[DIAG_DOWN_RIGHT_PRED], c[VERT_RIGHT_PRED],
267  20, 128);
268  sum -= c[DIAG_DOWN_LEFT_PRED];
269  adapt_prob(&pp[6], c[DIAG_DOWN_LEFT_PRED], sum, 20, 128);
270  sum -= c[VERT_LEFT_PRED];
271  adapt_prob(&pp[7], c[VERT_LEFT_PRED], sum, 20, 128);
272  adapt_prob(&pp[8], c[HOR_DOWN_PRED], c[HOR_UP_PRED], 20, 128);
273  }
274 }
VP9TileData::intra
unsigned intra[4][2]
Definition: vp9dec.h:174
HOR_PRED
Definition: vp9.h:47
VP9TileData::single_ref
unsigned single_ref[5][2][2]
Definition: vp9dec.h:176
vp56.h
VP5 and VP6 compatible video decoder (common features)
ff_vp9_adapt_probs
void ff_vp9_adapt_probs(VP9Context *s)
Definition: vp9prob.c:46
VP9SharedContext::h
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Definition: vp9shared.h:160
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Definition: vp9dec.h:124
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Definition: vp9dec.h:109
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Definition: vp9dec.h:55
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Definition: vp9shared.h:109
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Definition: vp9dec.h:194
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Definition: vp9dec.h:179
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Definition: vp9dec.h:54
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Definition: vp9dec.h:180
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Definition: vp9dec.h:170
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Definition: vp9shared.h:105
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Definition: vp9dec.h:172
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Definition: vp9dec.h:125
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Definition: vp9.h:46
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Definition: vp9dec.h:58
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Definition: vp9shared.h:149
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Definition: vp9dec.h:178
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static av_always_inline void adapt_prob(uint8_t *p, unsigned ct0, unsigned ct1, int max_count, int update_factor)
Definition: vp9prob.c:29
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Definition: attributes.h:39
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Definition: vp9dec.h:181
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