x86: cabac: add operand size suffixes missing from 6c32576
[libav.git] / libavcodec / vp6.c
CommitLineData
6168781f 1/*
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2 * Copyright (C) 2006 Aurelien Jacobs <aurel@gnuage.org>
3 *
2912e87a 4 * This file is part of Libav.
b78e7197 5 *
2912e87a 6 * Libav is free software; you can redistribute it and/or
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7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
2912e87a 11 * Libav is distributed in the hope that it will be useful,
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12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
2912e87a 17 * License along with Libav; if not, write to the Free Software
7b94177e 18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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19 */
20
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21/**
22 * @file
23 * VP6 compatible video decoder
24 *
25 * The VP6F decoder accepts an optional 1 byte extradata. It is composed of:
26 * - upper 4 bits: difference between encoded width and visible width
27 * - lower 4 bits: difference between encoded height and visible height
28 */
29
5ce117c3 30#include <stdlib.h>
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31
32#include "avcodec.h"
33#include "dsputil.h"
9106a698 34#include "get_bits.h"
f28b1048 35#include "huffman.h"
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36
37#include "vp56.h"
38#include "vp56data.h"
39#include "vp6data.h"
40
796cea09 41#define VP6_MAX_HUFF_SIZE 12
5ce117c3 42
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43static void vp6_parse_coeff(VP56Context *s);
44static void vp6_parse_coeff_huffman(VP56Context *s);
f28b1048 45
3d52bca6 46static int vp6_parse_header(VP56Context *s, const uint8_t *buf, int buf_size,
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47 int *golden_frame)
48{
3d52bca6 49 VP56RangeCoder *c = &s->c;
9110a0e3 50 int parse_filter_info = 0;
dd9b8635 51 int coeff_offset = 0;
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52 int vrt_shift = 0;
53 int sub_version;
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54 int rows, cols;
55 int res = 1;
dd9b8635 56 int separated_coeff = buf[0] & 1;
5ce117c3 57
704a2881 58 s->framep[VP56_FRAME_CURRENT]->key_frame = !(buf[0] & 0x80);
d9504970 59 ff_vp56_init_dequant(s, (buf[0] >> 1) & 0x3F);
5ce117c3 60
704a2881 61 if (s->framep[VP56_FRAME_CURRENT]->key_frame) {
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62 sub_version = buf[1] >> 3;
63 if (sub_version > 8)
64 return 0;
dd9b8635 65 s->filter_header = buf[1] & 0x06;
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66 if (buf[1] & 1) {
67 av_log(s->avctx, AV_LOG_ERROR, "interlacing not supported\n");
68 return 0;
69 }
dd9b8635 70 if (separated_coeff || !s->filter_header) {
fead30d4 71 coeff_offset = AV_RB16(buf+2) - 2;
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72 buf += 2;
73 buf_size -= 2;
74 }
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75
76 rows = buf[2]; /* number of stored macroblock rows */
77 cols = buf[3]; /* number of stored macroblock cols */
78 /* buf[4] is number of displayed macroblock rows */
79 /* buf[5] is number of displayed macroblock cols */
80
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81 if (!s->macroblocks || /* first frame */
82 16*cols != s->avctx->coded_width ||
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83 16*rows != s->avctx->coded_height) {
84 avcodec_set_dimensions(s->avctx, 16*cols, 16*rows);
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85 if (s->avctx->extradata_size == 1) {
86 s->avctx->width -= s->avctx->extradata[0] >> 4;
87 s->avctx->height -= s->avctx->extradata[0] & 0x0F;
88 }
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89 res = 2;
90 }
91
905ef0d0 92 ff_vp56_init_range_decoder(c, buf+6, buf_size-6);
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93 vp56_rac_gets(c, 2);
94
dd9b8635 95 parse_filter_info = s->filter_header;
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96 if (sub_version < 8)
97 vrt_shift = 5;
98 s->sub_version = sub_version;
5ce117c3 99 } else {
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100 if (!s->sub_version)
101 return 0;
102
dd9b8635 103 if (separated_coeff || !s->filter_header) {
fead30d4 104 coeff_offset = AV_RB16(buf+1) - 2;
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105 buf += 2;
106 buf_size -= 2;
107 }
905ef0d0 108 ff_vp56_init_range_decoder(c, buf+1, buf_size-1);
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109
110 *golden_frame = vp56_rac_get(c);
dd9b8635 111 if (s->filter_header) {
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112 s->deblock_filtering = vp56_rac_get(c);
113 if (s->deblock_filtering)
114 vp56_rac_get(c);
115 if (s->sub_version > 7)
116 parse_filter_info = vp56_rac_get(c);
dd9b8635 117 }
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118 }
119
120 if (parse_filter_info) {
121 if (vp56_rac_get(c)) {
122 s->filter_mode = 2;
9110a0e3 123 s->sample_variance_threshold = vp56_rac_gets(c, 5) << vrt_shift;
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124 s->max_vector_length = 2 << vp56_rac_gets(c, 3);
125 } else if (vp56_rac_get(c)) {
126 s->filter_mode = 1;
127 } else {
128 s->filter_mode = 0;
129 }
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130 if (s->sub_version > 7)
131 s->filter_selection = vp56_rac_gets(c, 4);
132 else
133 s->filter_selection = 16;
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134 }
135
f28b1048 136 s->use_huffman = vp56_rac_get(c);
dd9b8635 137
f28b1048 138 s->parse_coeff = vp6_parse_coeff;
dd9b8635 139 if (coeff_offset) {
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140 buf += coeff_offset;
141 buf_size -= coeff_offset;
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142 if (buf_size < 0)
143 return 0;
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144 if (s->use_huffman) {
145 s->parse_coeff = vp6_parse_coeff_huffman;
713b0bff 146 init_get_bits(&s->gb, buf, buf_size<<3);
f28b1048 147 } else {
905ef0d0 148 ff_vp56_init_range_decoder(&s->cc, buf, buf_size);
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149 s->ccp = &s->cc;
150 }
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151 } else {
152 s->ccp = &s->c;
153 }
154
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155 return res;
156}
157
3d52bca6 158static void vp6_coeff_order_table_init(VP56Context *s)
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159{
160 int i, pos, idx = 1;
161
247df384 162 s->modelp->coeff_index_to_pos[0] = 0;
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163 for (i=0; i<16; i++)
164 for (pos=1; pos<64; pos++)
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165 if (s->modelp->coeff_reorder[pos] == i)
166 s->modelp->coeff_index_to_pos[idx++] = pos;
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167}
168
3d52bca6 169static void vp6_default_models_init(VP56Context *s)
5ce117c3 170{
d887151d 171 VP56Model *model = s->modelp;
5ce117c3 172
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173 model->vector_dct[0] = 0xA2;
174 model->vector_dct[1] = 0xA4;
175 model->vector_sig[0] = 0x80;
176 model->vector_sig[1] = 0x80;
177
178 memcpy(model->mb_types_stats, vp56_def_mb_types_stats, sizeof(model->mb_types_stats));
179 memcpy(model->vector_fdv, vp6_def_fdv_vector_model, sizeof(model->vector_fdv));
180 memcpy(model->vector_pdv, vp6_def_pdv_vector_model, sizeof(model->vector_pdv));
181 memcpy(model->coeff_runv, vp6_def_runv_coeff_model, sizeof(model->coeff_runv));
182 memcpy(model->coeff_reorder, vp6_def_coeff_reorder, sizeof(model->coeff_reorder));
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183
184 vp6_coeff_order_table_init(s);
185}
186
3d52bca6 187static void vp6_parse_vector_models(VP56Context *s)
5ce117c3 188{
3d52bca6 189 VP56RangeCoder *c = &s->c;
d887151d 190 VP56Model *model = s->modelp;
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191 int comp, node;
192
193 for (comp=0; comp<2; comp++) {
194 if (vp56_rac_get_prob(c, vp6_sig_dct_pct[comp][0]))
247df384 195 model->vector_dct[comp] = vp56_rac_gets_nn(c, 7);
5ce117c3 196 if (vp56_rac_get_prob(c, vp6_sig_dct_pct[comp][1]))
247df384 197 model->vector_sig[comp] = vp56_rac_gets_nn(c, 7);
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198 }
199
200 for (comp=0; comp<2; comp++)
201 for (node=0; node<7; node++)
202 if (vp56_rac_get_prob(c, vp6_pdv_pct[comp][node]))
247df384 203 model->vector_pdv[comp][node] = vp56_rac_gets_nn(c, 7);
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204
205 for (comp=0; comp<2; comp++)
206 for (node=0; node<8; node++)
207 if (vp56_rac_get_prob(c, vp6_fdv_pct[comp][node]))
247df384 208 model->vector_fdv[comp][node] = vp56_rac_gets_nn(c, 7);
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209}
210
d47f1607 211/* nodes must ascend by count, but with descending symbol order */
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212static int vp6_huff_cmp(const void *va, const void *vb)
213{
214 const Node *a = va, *b = vb;
d47f1607 215 return (a->count - b->count)*16 + (b->sym - a->sym);
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216}
217
3d52bca6 218static void vp6_build_huff_tree(VP56Context *s, uint8_t coeff_model[],
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219 const uint8_t *map, unsigned size, VLC *vlc)
220{
796cea09 221 Node nodes[2*VP6_MAX_HUFF_SIZE], *tmp = &nodes[size];
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222 int a, b, i;
223
224 /* first compute probabilities from model */
225 tmp[0].count = 256;
226 for (i=0; i<size-1; i++) {
227 a = tmp[i].count * coeff_model[i] >> 8;
228 b = tmp[i].count * (255 - coeff_model[i]) >> 8;
229 nodes[map[2*i ]].count = a + !a;
230 nodes[map[2*i+1]].count = b + !b;
231 }
232
0a41faa9 233 free_vlc(vlc);
f28b1048 234 /* then build the huffman tree accodring to probabilities */
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235 ff_huff_build_tree(s->avctx, vlc, size, nodes, vp6_huff_cmp,
236 FF_HUFFMAN_FLAG_HNODE_FIRST);
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237}
238
3d52bca6 239static void vp6_parse_coeff_models(VP56Context *s)
5ce117c3 240{
3d52bca6 241 VP56RangeCoder *c = &s->c;
d887151d 242 VP56Model *model = s->modelp;
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243 int def_prob[11];
244 int node, cg, ctx, pos;
245 int ct; /* code type */
246 int pt; /* plane type (0 for Y, 1 for U or V) */
247
248 memset(def_prob, 0x80, sizeof(def_prob));
249
250 for (pt=0; pt<2; pt++)
251 for (node=0; node<11; node++)
252 if (vp56_rac_get_prob(c, vp6_dccv_pct[pt][node])) {
253 def_prob[node] = vp56_rac_gets_nn(c, 7);
247df384 254 model->coeff_dccv[pt][node] = def_prob[node];
704a2881 255 } else if (s->framep[VP56_FRAME_CURRENT]->key_frame) {
247df384 256 model->coeff_dccv[pt][node] = def_prob[node];
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257 }
258
259 if (vp56_rac_get(c)) {
260 for (pos=1; pos<64; pos++)
261 if (vp56_rac_get_prob(c, vp6_coeff_reorder_pct[pos]))
247df384 262 model->coeff_reorder[pos] = vp56_rac_gets(c, 4);
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263 vp6_coeff_order_table_init(s);
264 }
265
266 for (cg=0; cg<2; cg++)
267 for (node=0; node<14; node++)
268 if (vp56_rac_get_prob(c, vp6_runv_pct[cg][node]))
247df384 269 model->coeff_runv[cg][node] = vp56_rac_gets_nn(c, 7);
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270
271 for (ct=0; ct<3; ct++)
272 for (pt=0; pt<2; pt++)
273 for (cg=0; cg<6; cg++)
274 for (node=0; node<11; node++)
275 if (vp56_rac_get_prob(c, vp6_ract_pct[ct][pt][cg][node])) {
276 def_prob[node] = vp56_rac_gets_nn(c, 7);
247df384 277 model->coeff_ract[pt][ct][cg][node] = def_prob[node];
704a2881 278 } else if (s->framep[VP56_FRAME_CURRENT]->key_frame) {
247df384 279 model->coeff_ract[pt][ct][cg][node] = def_prob[node];
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280 }
281
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282 if (s->use_huffman) {
283 for (pt=0; pt<2; pt++) {
284 vp6_build_huff_tree(s, model->coeff_dccv[pt],
285 vp6_huff_coeff_map, 12, &s->dccv_vlc[pt]);
286 vp6_build_huff_tree(s, model->coeff_runv[pt],
287 vp6_huff_run_map, 9, &s->runv_vlc[pt]);
288 for (ct=0; ct<3; ct++)
289 for (cg = 0; cg < 6; cg++)
290 vp6_build_huff_tree(s, model->coeff_ract[pt][ct][cg],
291 vp6_huff_coeff_map, 12,
292 &s->ract_vlc[pt][ct][cg]);
293 }
294 memset(s->nb_null, 0, sizeof(s->nb_null));
295 } else {
247df384 296 /* coeff_dcct is a linear combination of coeff_dccv */
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297 for (pt=0; pt<2; pt++)
298 for (ctx=0; ctx<3; ctx++)
299 for (node=0; node<5; node++)
247df384 300 model->coeff_dcct[pt][ctx][node] = av_clip(((model->coeff_dccv[pt][node] * vp6_dccv_lc[ctx][node][0] + 128) >> 8) + vp6_dccv_lc[ctx][node][1], 1, 255);
f28b1048 301 }
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302}
303
3d52bca6 304static void vp6_parse_vector_adjustment(VP56Context *s, VP56mv *vect)
5ce117c3 305{
3d52bca6 306 VP56RangeCoder *c = &s->c;
d887151d 307 VP56Model *model = s->modelp;
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308 int comp;
309
3d52bca6 310 *vect = (VP56mv) {0,0};
5ce117c3 311 if (s->vector_candidate_pos < 2)
d120e402 312 *vect = s->vector_candidate[0];
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313
314 for (comp=0; comp<2; comp++) {
315 int i, delta = 0;
316
247df384 317 if (vp56_rac_get_prob(c, model->vector_dct[comp])) {
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318 static const uint8_t prob_order[] = {0, 1, 2, 7, 6, 5, 4};
319 for (i=0; i<sizeof(prob_order); i++) {
320 int j = prob_order[i];
247df384 321 delta |= vp56_rac_get_prob(c, model->vector_fdv[comp][j])<<j;
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322 }
323 if (delta & 0xF0)
247df384 324 delta |= vp56_rac_get_prob(c, model->vector_fdv[comp][3])<<3;
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325 else
326 delta |= 8;
327 } else {
328 delta = vp56_rac_get_tree(c, vp56_pva_tree,
247df384 329 model->vector_pdv[comp]);
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330 }
331
247df384 332 if (delta && vp56_rac_get_prob(c, model->vector_sig[comp]))
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333 delta = -delta;
334
335 if (!comp)
d120e402 336 vect->x += delta;
5ce117c3 337 else
d120e402 338 vect->y += delta;
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339 }
340}
341
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342/**
343 * Read number of consecutive blocks with null DC or AC.
344 * This value is < 74.
345 */
3d52bca6 346static unsigned vp6_get_nb_null(VP56Context *s)
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347{
348 unsigned val = get_bits(&s->gb, 2);
349 if (val == 2)
350 val += get_bits(&s->gb, 2);
351 else if (val == 3) {
352 val = get_bits1(&s->gb) << 2;
353 val = 6+val + get_bits(&s->gb, 2+val);
354 }
355 return val;
356}
357
3d52bca6 358static void vp6_parse_coeff_huffman(VP56Context *s)
f28b1048 359{
d887151d 360 VP56Model *model = s->modelp;
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361 uint8_t *permute = s->scantable.permutated;
362 VLC *vlc_coeff;
363 int coeff, sign, coeff_idx;
364 int b, cg, idx;
365 int pt = 0; /* plane type (0 for Y, 1 for U or V) */
366
367 for (b=0; b<6; b++) {
368 int ct = 0; /* code type */
369 if (b > 3) pt = 1;
370 vlc_coeff = &s->dccv_vlc[pt];
371
372 for (coeff_idx=0; coeff_idx<64; ) {
373 int run = 1;
374 if (coeff_idx<2 && s->nb_null[coeff_idx][pt]) {
375 s->nb_null[coeff_idx][pt]--;
376 if (coeff_idx)
377 break;
378 } else {
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379 if (get_bits_count(&s->gb) >= s->gb.size_in_bits)
380 return;
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381 coeff = get_vlc2(&s->gb, vlc_coeff->table, 9, 3);
382 if (coeff == 0) {
383 if (coeff_idx) {
384 int pt = (coeff_idx >= 6);
385 run += get_vlc2(&s->gb, s->runv_vlc[pt].table, 9, 3);
386 if (run >= 9)
387 run += get_bits(&s->gb, 6);
388 } else
389 s->nb_null[0][pt] = vp6_get_nb_null(s);
390 ct = 0;
391 } else if (coeff == 11) { /* end of block */
392 if (coeff_idx == 1) /* first AC coeff ? */
393 s->nb_null[1][pt] = vp6_get_nb_null(s);
394 break;
395 } else {
396 int coeff2 = vp56_coeff_bias[coeff];
397 if (coeff > 4)
398 coeff2 += get_bits(&s->gb, coeff <= 9 ? coeff - 4 : 11);
399 ct = 1 + (coeff2 > 1);
400 sign = get_bits1(&s->gb);
401 coeff2 = (coeff2 ^ -sign) + sign;
402 if (coeff_idx)
403 coeff2 *= s->dequant_ac;
404 idx = model->coeff_index_to_pos[coeff_idx];
405 s->block_coeff[b][permute[idx]] = coeff2;
406 }
407 }
408 coeff_idx+=run;
409 cg = FFMIN(vp6_coeff_groups[coeff_idx], 3);
410 vlc_coeff = &s->ract_vlc[pt][ct][cg];
411 }
412 }
413}
414
3d52bca6 415static void vp6_parse_coeff(VP56Context *s)
5ce117c3 416{
3d52bca6 417 VP56RangeCoder *c = s->ccp;
d887151d 418 VP56Model *model = s->modelp;
5ce117c3 419 uint8_t *permute = s->scantable.permutated;
247df384 420 uint8_t *model1, *model2, *model3;
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421 int coeff, sign, coeff_idx;
422 int b, i, cg, idx, ctx;
423 int pt = 0; /* plane type (0 for Y, 1 for U or V) */
424
425 for (b=0; b<6; b++) {
426 int ct = 1; /* code type */
427 int run = 1;
428
429 if (b > 3) pt = 1;
430
431 ctx = s->left_block[vp56_b6to4[b]].not_null_dc
432 + s->above_blocks[s->above_block_idx[b]].not_null_dc;
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433 model1 = model->coeff_dccv[pt];
434 model2 = model->coeff_dcct[pt][ctx];
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435
436 for (coeff_idx=0; coeff_idx<64; ) {
437 if ((coeff_idx>1 && ct==0) || vp56_rac_get_prob(c, model2[0])) {
438 /* parse a coeff */
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439 if (vp56_rac_get_prob(c, model2[2])) {
440 if (vp56_rac_get_prob(c, model2[3])) {
247df384 441 idx = vp56_rac_get_tree(c, vp56_pc_tree, model1);
f28b1048 442 coeff = vp56_coeff_bias[idx+5];
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443 for (i=vp56_coeff_bit_length[idx]; i>=0; i--)
444 coeff += vp56_rac_get_prob(c, vp56_coeff_parse_table[idx][i]) << i;
445 } else {
446 if (vp56_rac_get_prob(c, model2[4]))
247df384 447 coeff = 3 + vp56_rac_get_prob(c, model1[5]);
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448 else
449 coeff = 2;
450 }
451 ct = 2;
452 } else {
453 ct = 1;
454 coeff = 1;
455 }
456 sign = vp56_rac_get(c);
457 coeff = (coeff ^ -sign) + sign;
458 if (coeff_idx)
459 coeff *= s->dequant_ac;
247df384 460 idx = model->coeff_index_to_pos[coeff_idx];
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461 s->block_coeff[b][permute[idx]] = coeff;
462 run = 1;
463 } else {
464 /* parse a run */
465 ct = 0;
4b8419aa 466 if (coeff_idx > 0) {
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467 if (!vp56_rac_get_prob(c, model2[1]))
468 break;
469
247df384 470 model3 = model->coeff_runv[coeff_idx >= 6];
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471 run = vp56_rac_get_tree(c, vp6_pcr_tree, model3);
472 if (!run)
473 for (run=9, i=0; i<6; i++)
474 run += vp56_rac_get_prob(c, model3[i+8]) << i;
475 }
476 }
477
478 cg = vp6_coeff_groups[coeff_idx+=run];
247df384 479 model1 = model2 = model->coeff_ract[pt][ct][cg];
5ce117c3 480 }
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481
482 s->left_block[vp56_b6to4[b]].not_null_dc =
483 s->above_blocks[s->above_block_idx[b]].not_null_dc = !!s->block_coeff[b][0];
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484 }
485}
486
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487static int vp6_block_variance(uint8_t *src, int stride)
488{
489 int sum = 0, square_sum = 0;
490 int y, x;
491
492 for (y=0; y<8; y+=2) {
493 for (x=0; x<8; x+=2) {
494 sum += src[x];
495 square_sum += src[x]*src[x];
496 }
497 src += 2*stride;
498 }
c29ff23c 499 return (16*square_sum - sum*sum) >> 8;
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500}
501
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502static void vp6_filter_hv4(uint8_t *dst, uint8_t *src, int stride,
503 int delta, const int16_t *weights)
504{
505 int x, y;
506
507 for (y=0; y<8; y++) {
508 for (x=0; x<8; x++) {
f66e4f5f 509 dst[x] = av_clip_uint8(( src[x-delta ] * weights[0]
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510 + src[x ] * weights[1]
511 + src[x+delta ] * weights[2]
512 + src[x+2*delta] * weights[3] + 64) >> 7);
513 }
514 src += stride;
515 dst += stride;
516 }
517}
518
3d52bca6 519static void vp6_filter_diag2(VP56Context *s, uint8_t *dst, uint8_t *src,
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520 int stride, int h_weight, int v_weight)
521{
522 uint8_t *tmp = s->edge_emu_buffer+16;
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523 s->dsp.put_h264_chroma_pixels_tab[0](tmp, src, stride, 9, h_weight, 0);
524 s->dsp.put_h264_chroma_pixels_tab[0](dst, tmp, stride, 8, 0, v_weight);
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525}
526
3d52bca6 527static void vp6_filter(VP56Context *s, uint8_t *dst, uint8_t *src,
5ce117c3 528 int offset1, int offset2, int stride,
3d52bca6 529 VP56mv mv, int mask, int select, int luma)
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530{
531 int filter4 = 0;
532 int x8 = mv.x & mask;
533 int y8 = mv.y & mask;
534
535 if (luma) {
536 x8 *= 2;
537 y8 *= 2;
538 filter4 = s->filter_mode;
539 if (filter4 == 2) {
540 if (s->max_vector_length &&
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541 (FFABS(mv.x) > s->max_vector_length ||
542 FFABS(mv.y) > s->max_vector_length)) {
5ce117c3 543 filter4 = 0;
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544 } else if (s->sample_variance_threshold
545 && (vp6_block_variance(src+offset1, stride)
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546 < s->sample_variance_threshold)) {
547 filter4 = 0;
548 }
549 }
550 }
551
552 if ((y8 && (offset2-offset1)*s->flip<0) || (!y8 && offset1 > offset2)) {
553 offset1 = offset2;
554 }
555
556 if (filter4) {
557 if (!y8) { /* left or right combine */
558 vp6_filter_hv4(dst, src+offset1, stride, 1,
559 vp6_block_copy_filter[select][x8]);
560 } else if (!x8) { /* above or below combine */
561 vp6_filter_hv4(dst, src+offset1, stride, stride,
562 vp6_block_copy_filter[select][y8]);
cd66ddb6 563 } else {
3a088514 564 s->vp56dsp.vp6_filter_diag4(dst, src+offset1+((mv.x^mv.y)>>31), stride,
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565 vp6_block_copy_filter[select][x8],
566 vp6_block_copy_filter[select][y8]);
567 }
568 } else {
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569 if (!x8 || !y8) {
570 s->dsp.put_h264_chroma_pixels_tab[0](dst, src+offset1, stride, 8, x8, y8);
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571 } else {
572 vp6_filter_diag2(s, dst, src+offset1 + ((mv.x^mv.y)>>31), stride, x8, y8);
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573 }
574 }
575}
576
98a6fff9 577static av_cold int vp6_decode_init(AVCodecContext *avctx)
5ce117c3 578{
3d52bca6 579 VP56Context *s = avctx->priv_data;
5ce117c3 580
d9504970 581 ff_vp56_init(avctx, avctx->codec->id == CODEC_ID_VP6,
52fa2054 582 avctx->codec->id == CODEC_ID_VP6A);
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583 s->vp56_coord_div = vp6_coord_div;
584 s->parse_vector_adjustment = vp6_parse_vector_adjustment;
5ce117c3 585 s->filter = vp6_filter;
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586 s->default_models_init = vp6_default_models_init;
587 s->parse_vector_models = vp6_parse_vector_models;
588 s->parse_coeff_models = vp6_parse_coeff_models;
589 s->parse_header = vp6_parse_header;
590
591 return 0;
592}
593
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594static av_cold int vp6_decode_free(AVCodecContext *avctx)
595{
596 VP56Context *s = avctx->priv_data;
597 int pt, ct, cg;
598
d9504970 599 ff_vp56_free(avctx);
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600
601 for (pt=0; pt<2; pt++) {
602 free_vlc(&s->dccv_vlc[pt]);
603 free_vlc(&s->runv_vlc[pt]);
604 for (ct=0; ct<3; ct++)
605 for (cg=0; cg<6; cg++)
606 free_vlc(&s->ract_vlc[pt][ct][cg]);
607 }
608 return 0;
609}
610
d36beb3f 611AVCodec ff_vp6_decoder = {
5ce117c3 612 "vp6",
72415b2a 613 AVMEDIA_TYPE_VIDEO,
5ce117c3 614 CODEC_ID_VP6,
3d52bca6 615 sizeof(VP56Context),
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616 vp6_decode_init,
617 NULL,
ded2100e 618 vp6_decode_free,
d9504970 619 ff_vp56_decode_frame,
75f6cc26 620 CODEC_CAP_DR1,
fe4bf374 621 .long_name = NULL_IF_CONFIG_SMALL("On2 VP6"),
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622};
623
624/* flash version, not flipped upside-down */
d36beb3f 625AVCodec ff_vp6f_decoder = {
5ce117c3 626 "vp6f",
72415b2a 627 AVMEDIA_TYPE_VIDEO,
5ce117c3 628 CODEC_ID_VP6F,
3d52bca6 629 sizeof(VP56Context),
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630 vp6_decode_init,
631 NULL,
ded2100e 632 vp6_decode_free,
d9504970 633 ff_vp56_decode_frame,
75f6cc26 634 CODEC_CAP_DR1,
fe4bf374 635 .long_name = NULL_IF_CONFIG_SMALL("On2 VP6 (Flash version)"),
5ce117c3 636};
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637
638/* flash version, not flipped upside-down, with alpha channel */
d36beb3f 639AVCodec ff_vp6a_decoder = {
91fc2cf1 640 "vp6a",
72415b2a 641 AVMEDIA_TYPE_VIDEO,
91fc2cf1 642 CODEC_ID_VP6A,
3d52bca6 643 sizeof(VP56Context),
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644 vp6_decode_init,
645 NULL,
ded2100e 646 vp6_decode_free,
d9504970 647 ff_vp56_decode_frame,
91fc2cf1 648 CODEC_CAP_DR1,
fe4bf374 649 .long_name = NULL_IF_CONFIG_SMALL("On2 VP6 (Flash version, with alpha channel)"),
91fc2cf1 650};