tls: Use TLSv1_client_method for OpenSSL
[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 if (s->framep[VP56_FRAME_CURRENT]->key_frame)
144 avcodec_set_dimensions(s->avctx, 0, 0);
40056c32 145 return 0;
a72cad0a 146 }
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147 if (s->use_huffman) {
148 s->parse_coeff = vp6_parse_coeff_huffman;
713b0bff 149 init_get_bits(&s->gb, buf, buf_size<<3);
f28b1048 150 } else {
905ef0d0 151 ff_vp56_init_range_decoder(&s->cc, buf, buf_size);
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152 s->ccp = &s->cc;
153 }
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154 } else {
155 s->ccp = &s->c;
156 }
157
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158 return res;
159}
160
3d52bca6 161static void vp6_coeff_order_table_init(VP56Context *s)
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162{
163 int i, pos, idx = 1;
164
247df384 165 s->modelp->coeff_index_to_pos[0] = 0;
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166 for (i=0; i<16; i++)
167 for (pos=1; pos<64; pos++)
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168 if (s->modelp->coeff_reorder[pos] == i)
169 s->modelp->coeff_index_to_pos[idx++] = pos;
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170}
171
3d52bca6 172static void vp6_default_models_init(VP56Context *s)
5ce117c3 173{
d887151d 174 VP56Model *model = s->modelp;
5ce117c3 175
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176 model->vector_dct[0] = 0xA2;
177 model->vector_dct[1] = 0xA4;
178 model->vector_sig[0] = 0x80;
179 model->vector_sig[1] = 0x80;
180
181 memcpy(model->mb_types_stats, vp56_def_mb_types_stats, sizeof(model->mb_types_stats));
182 memcpy(model->vector_fdv, vp6_def_fdv_vector_model, sizeof(model->vector_fdv));
183 memcpy(model->vector_pdv, vp6_def_pdv_vector_model, sizeof(model->vector_pdv));
184 memcpy(model->coeff_runv, vp6_def_runv_coeff_model, sizeof(model->coeff_runv));
185 memcpy(model->coeff_reorder, vp6_def_coeff_reorder, sizeof(model->coeff_reorder));
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186
187 vp6_coeff_order_table_init(s);
188}
189
3d52bca6 190static void vp6_parse_vector_models(VP56Context *s)
5ce117c3 191{
3d52bca6 192 VP56RangeCoder *c = &s->c;
d887151d 193 VP56Model *model = s->modelp;
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194 int comp, node;
195
196 for (comp=0; comp<2; comp++) {
197 if (vp56_rac_get_prob(c, vp6_sig_dct_pct[comp][0]))
247df384 198 model->vector_dct[comp] = vp56_rac_gets_nn(c, 7);
5ce117c3 199 if (vp56_rac_get_prob(c, vp6_sig_dct_pct[comp][1]))
247df384 200 model->vector_sig[comp] = vp56_rac_gets_nn(c, 7);
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201 }
202
203 for (comp=0; comp<2; comp++)
204 for (node=0; node<7; node++)
205 if (vp56_rac_get_prob(c, vp6_pdv_pct[comp][node]))
247df384 206 model->vector_pdv[comp][node] = vp56_rac_gets_nn(c, 7);
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207
208 for (comp=0; comp<2; comp++)
209 for (node=0; node<8; node++)
210 if (vp56_rac_get_prob(c, vp6_fdv_pct[comp][node]))
247df384 211 model->vector_fdv[comp][node] = vp56_rac_gets_nn(c, 7);
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212}
213
d47f1607 214/* nodes must ascend by count, but with descending symbol order */
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215static int vp6_huff_cmp(const void *va, const void *vb)
216{
217 const Node *a = va, *b = vb;
d47f1607 218 return (a->count - b->count)*16 + (b->sym - a->sym);
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219}
220
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221static int vp6_build_huff_tree(VP56Context *s, uint8_t coeff_model[],
222 const uint8_t *map, unsigned size, VLC *vlc)
f28b1048 223{
796cea09 224 Node nodes[2*VP6_MAX_HUFF_SIZE], *tmp = &nodes[size];
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225 int a, b, i;
226
227 /* first compute probabilities from model */
228 tmp[0].count = 256;
229 for (i=0; i<size-1; i++) {
230 a = tmp[i].count * coeff_model[i] >> 8;
231 b = tmp[i].count * (255 - coeff_model[i]) >> 8;
232 nodes[map[2*i ]].count = a + !a;
233 nodes[map[2*i+1]].count = b + !b;
234 }
235
0a41faa9 236 free_vlc(vlc);
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237 /* then build the huffman tree according to probabilities */
238 return ff_huff_build_tree(s->avctx, vlc, size, nodes, vp6_huff_cmp,
239 FF_HUFFMAN_FLAG_HNODE_FIRST);
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240}
241
066fff75 242static int vp6_parse_coeff_models(VP56Context *s)
5ce117c3 243{
3d52bca6 244 VP56RangeCoder *c = &s->c;
d887151d 245 VP56Model *model = s->modelp;
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246 int def_prob[11];
247 int node, cg, ctx, pos;
248 int ct; /* code type */
249 int pt; /* plane type (0 for Y, 1 for U or V) */
250
251 memset(def_prob, 0x80, sizeof(def_prob));
252
253 for (pt=0; pt<2; pt++)
254 for (node=0; node<11; node++)
255 if (vp56_rac_get_prob(c, vp6_dccv_pct[pt][node])) {
256 def_prob[node] = vp56_rac_gets_nn(c, 7);
247df384 257 model->coeff_dccv[pt][node] = def_prob[node];
704a2881 258 } else if (s->framep[VP56_FRAME_CURRENT]->key_frame) {
247df384 259 model->coeff_dccv[pt][node] = def_prob[node];
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260 }
261
262 if (vp56_rac_get(c)) {
263 for (pos=1; pos<64; pos++)
264 if (vp56_rac_get_prob(c, vp6_coeff_reorder_pct[pos]))
247df384 265 model->coeff_reorder[pos] = vp56_rac_gets(c, 4);
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266 vp6_coeff_order_table_init(s);
267 }
268
269 for (cg=0; cg<2; cg++)
270 for (node=0; node<14; node++)
271 if (vp56_rac_get_prob(c, vp6_runv_pct[cg][node]))
247df384 272 model->coeff_runv[cg][node] = vp56_rac_gets_nn(c, 7);
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273
274 for (ct=0; ct<3; ct++)
275 for (pt=0; pt<2; pt++)
276 for (cg=0; cg<6; cg++)
277 for (node=0; node<11; node++)
278 if (vp56_rac_get_prob(c, vp6_ract_pct[ct][pt][cg][node])) {
279 def_prob[node] = vp56_rac_gets_nn(c, 7);
247df384 280 model->coeff_ract[pt][ct][cg][node] = def_prob[node];
704a2881 281 } else if (s->framep[VP56_FRAME_CURRENT]->key_frame) {
247df384 282 model->coeff_ract[pt][ct][cg][node] = def_prob[node];
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283 }
284
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285 if (s->use_huffman) {
286 for (pt=0; pt<2; pt++) {
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287 if (vp6_build_huff_tree(s, model->coeff_dccv[pt],
288 vp6_huff_coeff_map, 12, &s->dccv_vlc[pt]))
289 return -1;
290 if (vp6_build_huff_tree(s, model->coeff_runv[pt],
291 vp6_huff_run_map, 9, &s->runv_vlc[pt]))
292 return -1;
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293 for (ct=0; ct<3; ct++)
294 for (cg = 0; cg < 6; cg++)
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295 if (vp6_build_huff_tree(s, model->coeff_ract[pt][ct][cg],
296 vp6_huff_coeff_map, 12,
297 &s->ract_vlc[pt][ct][cg]))
298 return -1;
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299 }
300 memset(s->nb_null, 0, sizeof(s->nb_null));
301 } else {
247df384 302 /* coeff_dcct is a linear combination of coeff_dccv */
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303 for (pt=0; pt<2; pt++)
304 for (ctx=0; ctx<3; ctx++)
305 for (node=0; node<5; node++)
247df384 306 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 307 }
066fff75 308 return 0;
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309}
310
3d52bca6 311static void vp6_parse_vector_adjustment(VP56Context *s, VP56mv *vect)
5ce117c3 312{
3d52bca6 313 VP56RangeCoder *c = &s->c;
d887151d 314 VP56Model *model = s->modelp;
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315 int comp;
316
3d52bca6 317 *vect = (VP56mv) {0,0};
5ce117c3 318 if (s->vector_candidate_pos < 2)
d120e402 319 *vect = s->vector_candidate[0];
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320
321 for (comp=0; comp<2; comp++) {
322 int i, delta = 0;
323
247df384 324 if (vp56_rac_get_prob(c, model->vector_dct[comp])) {
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325 static const uint8_t prob_order[] = {0, 1, 2, 7, 6, 5, 4};
326 for (i=0; i<sizeof(prob_order); i++) {
327 int j = prob_order[i];
247df384 328 delta |= vp56_rac_get_prob(c, model->vector_fdv[comp][j])<<j;
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329 }
330 if (delta & 0xF0)
247df384 331 delta |= vp56_rac_get_prob(c, model->vector_fdv[comp][3])<<3;
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332 else
333 delta |= 8;
334 } else {
335 delta = vp56_rac_get_tree(c, vp56_pva_tree,
247df384 336 model->vector_pdv[comp]);
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337 }
338
247df384 339 if (delta && vp56_rac_get_prob(c, model->vector_sig[comp]))
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340 delta = -delta;
341
342 if (!comp)
d120e402 343 vect->x += delta;
5ce117c3 344 else
d120e402 345 vect->y += delta;
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346 }
347}
348
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349/**
350 * Read number of consecutive blocks with null DC or AC.
351 * This value is < 74.
352 */
3d52bca6 353static unsigned vp6_get_nb_null(VP56Context *s)
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354{
355 unsigned val = get_bits(&s->gb, 2);
356 if (val == 2)
357 val += get_bits(&s->gb, 2);
358 else if (val == 3) {
359 val = get_bits1(&s->gb) << 2;
360 val = 6+val + get_bits(&s->gb, 2+val);
361 }
362 return val;
363}
364
3d52bca6 365static void vp6_parse_coeff_huffman(VP56Context *s)
f28b1048 366{
d887151d 367 VP56Model *model = s->modelp;
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368 uint8_t *permute = s->scantable.permutated;
369 VLC *vlc_coeff;
370 int coeff, sign, coeff_idx;
371 int b, cg, idx;
372 int pt = 0; /* plane type (0 for Y, 1 for U or V) */
373
374 for (b=0; b<6; b++) {
375 int ct = 0; /* code type */
376 if (b > 3) pt = 1;
377 vlc_coeff = &s->dccv_vlc[pt];
378
2a6eb062 379 for (coeff_idx = 0;;) {
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380 int run = 1;
381 if (coeff_idx<2 && s->nb_null[coeff_idx][pt]) {
382 s->nb_null[coeff_idx][pt]--;
383 if (coeff_idx)
384 break;
385 } else {
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386 if (get_bits_count(&s->gb) >= s->gb.size_in_bits)
387 return;
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388 coeff = get_vlc2(&s->gb, vlc_coeff->table, 9, 3);
389 if (coeff == 0) {
390 if (coeff_idx) {
391 int pt = (coeff_idx >= 6);
392 run += get_vlc2(&s->gb, s->runv_vlc[pt].table, 9, 3);
393 if (run >= 9)
394 run += get_bits(&s->gb, 6);
395 } else
396 s->nb_null[0][pt] = vp6_get_nb_null(s);
397 ct = 0;
398 } else if (coeff == 11) { /* end of block */
399 if (coeff_idx == 1) /* first AC coeff ? */
400 s->nb_null[1][pt] = vp6_get_nb_null(s);
401 break;
402 } else {
403 int coeff2 = vp56_coeff_bias[coeff];
404 if (coeff > 4)
405 coeff2 += get_bits(&s->gb, coeff <= 9 ? coeff - 4 : 11);
406 ct = 1 + (coeff2 > 1);
407 sign = get_bits1(&s->gb);
408 coeff2 = (coeff2 ^ -sign) + sign;
409 if (coeff_idx)
410 coeff2 *= s->dequant_ac;
411 idx = model->coeff_index_to_pos[coeff_idx];
412 s->block_coeff[b][permute[idx]] = coeff2;
413 }
414 }
415 coeff_idx+=run;
2a6eb062
AC
416 if (coeff_idx >= 64)
417 break;
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418 cg = FFMIN(vp6_coeff_groups[coeff_idx], 3);
419 vlc_coeff = &s->ract_vlc[pt][ct][cg];
420 }
421 }
422}
423
3d52bca6 424static void vp6_parse_coeff(VP56Context *s)
5ce117c3 425{
3d52bca6 426 VP56RangeCoder *c = s->ccp;
d887151d 427 VP56Model *model = s->modelp;
5ce117c3 428 uint8_t *permute = s->scantable.permutated;
247df384 429 uint8_t *model1, *model2, *model3;
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430 int coeff, sign, coeff_idx;
431 int b, i, cg, idx, ctx;
432 int pt = 0; /* plane type (0 for Y, 1 for U or V) */
433
434 for (b=0; b<6; b++) {
435 int ct = 1; /* code type */
436 int run = 1;
437
438 if (b > 3) pt = 1;
439
440 ctx = s->left_block[vp56_b6to4[b]].not_null_dc
441 + s->above_blocks[s->above_block_idx[b]].not_null_dc;
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442 model1 = model->coeff_dccv[pt];
443 model2 = model->coeff_dcct[pt][ctx];
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444
445 for (coeff_idx=0; coeff_idx<64; ) {
446 if ((coeff_idx>1 && ct==0) || vp56_rac_get_prob(c, model2[0])) {
447 /* parse a coeff */
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448 if (vp56_rac_get_prob(c, model2[2])) {
449 if (vp56_rac_get_prob(c, model2[3])) {
247df384 450 idx = vp56_rac_get_tree(c, vp56_pc_tree, model1);
f28b1048 451 coeff = vp56_coeff_bias[idx+5];
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452 for (i=vp56_coeff_bit_length[idx]; i>=0; i--)
453 coeff += vp56_rac_get_prob(c, vp56_coeff_parse_table[idx][i]) << i;
454 } else {
455 if (vp56_rac_get_prob(c, model2[4]))
247df384 456 coeff = 3 + vp56_rac_get_prob(c, model1[5]);
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457 else
458 coeff = 2;
459 }
460 ct = 2;
461 } else {
462 ct = 1;
463 coeff = 1;
464 }
465 sign = vp56_rac_get(c);
466 coeff = (coeff ^ -sign) + sign;
467 if (coeff_idx)
468 coeff *= s->dequant_ac;
247df384 469 idx = model->coeff_index_to_pos[coeff_idx];
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470 s->block_coeff[b][permute[idx]] = coeff;
471 run = 1;
472 } else {
473 /* parse a run */
474 ct = 0;
4b8419aa 475 if (coeff_idx > 0) {
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476 if (!vp56_rac_get_prob(c, model2[1]))
477 break;
478
247df384 479 model3 = model->coeff_runv[coeff_idx >= 6];
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480 run = vp56_rac_get_tree(c, vp6_pcr_tree, model3);
481 if (!run)
482 for (run=9, i=0; i<6; i++)
483 run += vp56_rac_get_prob(c, model3[i+8]) << i;
484 }
485 }
486
487 cg = vp6_coeff_groups[coeff_idx+=run];
247df384 488 model1 = model2 = model->coeff_ract[pt][ct][cg];
5ce117c3 489 }
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490
491 s->left_block[vp56_b6to4[b]].not_null_dc =
492 s->above_blocks[s->above_block_idx[b]].not_null_dc = !!s->block_coeff[b][0];
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493 }
494}
495
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496static int vp6_block_variance(uint8_t *src, int stride)
497{
498 int sum = 0, square_sum = 0;
499 int y, x;
500
501 for (y=0; y<8; y+=2) {
502 for (x=0; x<8; x+=2) {
503 sum += src[x];
504 square_sum += src[x]*src[x];
505 }
506 src += 2*stride;
507 }
c29ff23c 508 return (16*square_sum - sum*sum) >> 8;
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509}
510
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511static void vp6_filter_hv4(uint8_t *dst, uint8_t *src, int stride,
512 int delta, const int16_t *weights)
513{
514 int x, y;
515
516 for (y=0; y<8; y++) {
517 for (x=0; x<8; x++) {
f66e4f5f 518 dst[x] = av_clip_uint8(( src[x-delta ] * weights[0]
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519 + src[x ] * weights[1]
520 + src[x+delta ] * weights[2]
521 + src[x+2*delta] * weights[3] + 64) >> 7);
522 }
523 src += stride;
524 dst += stride;
525 }
526}
527
3d52bca6 528static void vp6_filter_diag2(VP56Context *s, uint8_t *dst, uint8_t *src,
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529 int stride, int h_weight, int v_weight)
530{
531 uint8_t *tmp = s->edge_emu_buffer+16;
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532 s->dsp.put_h264_chroma_pixels_tab[0](tmp, src, stride, 9, h_weight, 0);
533 s->dsp.put_h264_chroma_pixels_tab[0](dst, tmp, stride, 8, 0, v_weight);
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534}
535
3d52bca6 536static void vp6_filter(VP56Context *s, uint8_t *dst, uint8_t *src,
5ce117c3 537 int offset1, int offset2, int stride,
3d52bca6 538 VP56mv mv, int mask, int select, int luma)
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539{
540 int filter4 = 0;
541 int x8 = mv.x & mask;
542 int y8 = mv.y & mask;
543
544 if (luma) {
545 x8 *= 2;
546 y8 *= 2;
547 filter4 = s->filter_mode;
548 if (filter4 == 2) {
549 if (s->max_vector_length &&
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550 (FFABS(mv.x) > s->max_vector_length ||
551 FFABS(mv.y) > s->max_vector_length)) {
5ce117c3 552 filter4 = 0;
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553 } else if (s->sample_variance_threshold
554 && (vp6_block_variance(src+offset1, stride)
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555 < s->sample_variance_threshold)) {
556 filter4 = 0;
557 }
558 }
559 }
560
561 if ((y8 && (offset2-offset1)*s->flip<0) || (!y8 && offset1 > offset2)) {
562 offset1 = offset2;
563 }
564
565 if (filter4) {
566 if (!y8) { /* left or right combine */
567 vp6_filter_hv4(dst, src+offset1, stride, 1,
568 vp6_block_copy_filter[select][x8]);
569 } else if (!x8) { /* above or below combine */
570 vp6_filter_hv4(dst, src+offset1, stride, stride,
571 vp6_block_copy_filter[select][y8]);
cd66ddb6 572 } else {
3a088514 573 s->vp56dsp.vp6_filter_diag4(dst, src+offset1+((mv.x^mv.y)>>31), stride,
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574 vp6_block_copy_filter[select][x8],
575 vp6_block_copy_filter[select][y8]);
576 }
577 } else {
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578 if (!x8 || !y8) {
579 s->dsp.put_h264_chroma_pixels_tab[0](dst, src+offset1, stride, 8, x8, y8);
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580 } else {
581 vp6_filter_diag2(s, dst, src+offset1 + ((mv.x^mv.y)>>31), stride, x8, y8);
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582 }
583 }
584}
585
98a6fff9 586static av_cold int vp6_decode_init(AVCodecContext *avctx)
5ce117c3 587{
3d52bca6 588 VP56Context *s = avctx->priv_data;
5ce117c3 589
d9504970 590 ff_vp56_init(avctx, avctx->codec->id == CODEC_ID_VP6,
52fa2054 591 avctx->codec->id == CODEC_ID_VP6A);
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592 s->vp56_coord_div = vp6_coord_div;
593 s->parse_vector_adjustment = vp6_parse_vector_adjustment;
5ce117c3 594 s->filter = vp6_filter;
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595 s->default_models_init = vp6_default_models_init;
596 s->parse_vector_models = vp6_parse_vector_models;
597 s->parse_coeff_models = vp6_parse_coeff_models;
598 s->parse_header = vp6_parse_header;
599
600 return 0;
601}
602
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603static av_cold int vp6_decode_free(AVCodecContext *avctx)
604{
605 VP56Context *s = avctx->priv_data;
606 int pt, ct, cg;
607
d9504970 608 ff_vp56_free(avctx);
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609
610 for (pt=0; pt<2; pt++) {
611 free_vlc(&s->dccv_vlc[pt]);
612 free_vlc(&s->runv_vlc[pt]);
613 for (ct=0; ct<3; ct++)
614 for (cg=0; cg<6; cg++)
615 free_vlc(&s->ract_vlc[pt][ct][cg]);
616 }
617 return 0;
618}
619
d36beb3f 620AVCodec ff_vp6_decoder = {
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621 .name = "vp6",
622 .type = AVMEDIA_TYPE_VIDEO,
623 .id = CODEC_ID_VP6,
624 .priv_data_size = sizeof(VP56Context),
625 .init = vp6_decode_init,
626 .close = vp6_decode_free,
627 .decode = ff_vp56_decode_frame,
628 .capabilities = CODEC_CAP_DR1,
fe4bf374 629 .long_name = NULL_IF_CONFIG_SMALL("On2 VP6"),
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630};
631
632/* flash version, not flipped upside-down */
d36beb3f 633AVCodec ff_vp6f_decoder = {
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634 .name = "vp6f",
635 .type = AVMEDIA_TYPE_VIDEO,
636 .id = CODEC_ID_VP6F,
637 .priv_data_size = sizeof(VP56Context),
638 .init = vp6_decode_init,
639 .close = vp6_decode_free,
640 .decode = ff_vp56_decode_frame,
641 .capabilities = CODEC_CAP_DR1,
fe4bf374 642 .long_name = NULL_IF_CONFIG_SMALL("On2 VP6 (Flash version)"),
5ce117c3 643};
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644
645/* flash version, not flipped upside-down, with alpha channel */
d36beb3f 646AVCodec ff_vp6a_decoder = {
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647 .name = "vp6a",
648 .type = AVMEDIA_TYPE_VIDEO,
649 .id = CODEC_ID_VP6A,
650 .priv_data_size = sizeof(VP56Context),
651 .init = vp6_decode_init,
652 .close = vp6_decode_free,
653 .decode = ff_vp56_decode_frame,
654 .capabilities = CODEC_CAP_DR1,
fe4bf374 655 .long_name = NULL_IF_CONFIG_SMALL("On2 VP6 (Flash version, with alpha channel)"),
91fc2cf1 656};