Add ff_ prefix to data symbols of encoders, decoders, hwaccel, parsers, bsf.
[libav.git] / libavcodec / vp6.c
CommitLineData
5ce117c3 1/**
ba87f080 2 * @file
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3 * VP6 compatible video decoder
4 *
5 * Copyright (C) 2006 Aurelien Jacobs <aurel@gnuage.org>
6 *
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7 * The VP6F decoder accepts an optional 1 byte extradata. It is composed of:
8 * - upper 4bits: difference between encoded width and visible width
9 * - lower 4bits: difference between encoded height and visible height
10 *
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11 * This file is part of FFmpeg.
12 *
13 * FFmpeg is free software; you can redistribute it and/or
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14 * modify it under the terms of the GNU Lesser General Public
15 * License as published by the Free Software Foundation; either
16 * version 2.1 of the License, or (at your option) any later version.
17 *
b78e7197 18 * FFmpeg is distributed in the hope that it will be useful,
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19 * but WITHOUT ANY WARRANTY; without even the implied warranty of
20 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
21 * Lesser General Public License for more details.
22 *
23 * You should have received a copy of the GNU Lesser General Public
b78e7197 24 * License along with FFmpeg; if not, write to the Free Software
7b94177e 25 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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26 */
27
28#include <stdlib.h>
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29
30#include "avcodec.h"
31#include "dsputil.h"
9106a698 32#include "get_bits.h"
f28b1048 33#include "huffman.h"
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34
35#include "vp56.h"
36#include "vp56data.h"
37#include "vp6data.h"
38
796cea09 39#define VP6_MAX_HUFF_SIZE 12
5ce117c3 40
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41static void vp6_parse_coeff(VP56Context *s);
42static void vp6_parse_coeff_huffman(VP56Context *s);
f28b1048 43
3d52bca6 44static int vp6_parse_header(VP56Context *s, const uint8_t *buf, int buf_size,
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45 int *golden_frame)
46{
3d52bca6 47 VP56RangeCoder *c = &s->c;
9110a0e3 48 int parse_filter_info = 0;
dd9b8635 49 int coeff_offset = 0;
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50 int vrt_shift = 0;
51 int sub_version;
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52 int rows, cols;
53 int res = 1;
dd9b8635 54 int separated_coeff = buf[0] & 1;
5ce117c3 55
704a2881 56 s->framep[VP56_FRAME_CURRENT]->key_frame = !(buf[0] & 0x80);
d9504970 57 ff_vp56_init_dequant(s, (buf[0] >> 1) & 0x3F);
5ce117c3 58
704a2881 59 if (s->framep[VP56_FRAME_CURRENT]->key_frame) {
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60 sub_version = buf[1] >> 3;
61 if (sub_version > 8)
62 return 0;
dd9b8635 63 s->filter_header = buf[1] & 0x06;
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64 if (buf[1] & 1) {
65 av_log(s->avctx, AV_LOG_ERROR, "interlacing not supported\n");
66 return 0;
67 }
dd9b8635 68 if (separated_coeff || !s->filter_header) {
fead30d4 69 coeff_offset = AV_RB16(buf+2) - 2;
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70 buf += 2;
71 buf_size -= 2;
72 }
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73
74 rows = buf[2]; /* number of stored macroblock rows */
75 cols = buf[3]; /* number of stored macroblock cols */
76 /* buf[4] is number of displayed macroblock rows */
77 /* buf[5] is number of displayed macroblock cols */
78
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79 if (!s->macroblocks || /* first frame */
80 16*cols != s->avctx->coded_width ||
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81 16*rows != s->avctx->coded_height) {
82 avcodec_set_dimensions(s->avctx, 16*cols, 16*rows);
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83 if (s->avctx->extradata_size == 1) {
84 s->avctx->width -= s->avctx->extradata[0] >> 4;
85 s->avctx->height -= s->avctx->extradata[0] & 0x0F;
86 }
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87 res = 2;
88 }
89
905ef0d0 90 ff_vp56_init_range_decoder(c, buf+6, buf_size-6);
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91 vp56_rac_gets(c, 2);
92
dd9b8635 93 parse_filter_info = s->filter_header;
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94 if (sub_version < 8)
95 vrt_shift = 5;
96 s->sub_version = sub_version;
5ce117c3 97 } else {
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98 if (!s->sub_version)
99 return 0;
100
dd9b8635 101 if (separated_coeff || !s->filter_header) {
fead30d4 102 coeff_offset = AV_RB16(buf+1) - 2;
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103 buf += 2;
104 buf_size -= 2;
105 }
905ef0d0 106 ff_vp56_init_range_decoder(c, buf+1, buf_size-1);
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107
108 *golden_frame = vp56_rac_get(c);
dd9b8635 109 if (s->filter_header) {
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110 s->deblock_filtering = vp56_rac_get(c);
111 if (s->deblock_filtering)
112 vp56_rac_get(c);
113 if (s->sub_version > 7)
114 parse_filter_info = vp56_rac_get(c);
dd9b8635 115 }
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116 }
117
118 if (parse_filter_info) {
119 if (vp56_rac_get(c)) {
120 s->filter_mode = 2;
9110a0e3 121 s->sample_variance_threshold = vp56_rac_gets(c, 5) << vrt_shift;
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122 s->max_vector_length = 2 << vp56_rac_gets(c, 3);
123 } else if (vp56_rac_get(c)) {
124 s->filter_mode = 1;
125 } else {
126 s->filter_mode = 0;
127 }
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128 if (s->sub_version > 7)
129 s->filter_selection = vp56_rac_gets(c, 4);
130 else
131 s->filter_selection = 16;
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132 }
133
f28b1048 134 s->use_huffman = vp56_rac_get(c);
dd9b8635 135
f28b1048 136 s->parse_coeff = vp6_parse_coeff;
dd9b8635 137 if (coeff_offset) {
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138 buf += coeff_offset;
139 buf_size -= coeff_offset;
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140 if (buf_size < 0)
141 return 0;
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142 if (s->use_huffman) {
143 s->parse_coeff = vp6_parse_coeff_huffman;
713b0bff 144 init_get_bits(&s->gb, buf, buf_size<<3);
f28b1048 145 } else {
905ef0d0 146 ff_vp56_init_range_decoder(&s->cc, buf, buf_size);
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147 s->ccp = &s->cc;
148 }
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149 } else {
150 s->ccp = &s->c;
151 }
152
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153 return res;
154}
155
3d52bca6 156static void vp6_coeff_order_table_init(VP56Context *s)
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157{
158 int i, pos, idx = 1;
159
247df384 160 s->modelp->coeff_index_to_pos[0] = 0;
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161 for (i=0; i<16; i++)
162 for (pos=1; pos<64; pos++)
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163 if (s->modelp->coeff_reorder[pos] == i)
164 s->modelp->coeff_index_to_pos[idx++] = pos;
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165}
166
3d52bca6 167static void vp6_default_models_init(VP56Context *s)
5ce117c3 168{
d887151d 169 VP56Model *model = s->modelp;
5ce117c3 170
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171 model->vector_dct[0] = 0xA2;
172 model->vector_dct[1] = 0xA4;
173 model->vector_sig[0] = 0x80;
174 model->vector_sig[1] = 0x80;
175
176 memcpy(model->mb_types_stats, vp56_def_mb_types_stats, sizeof(model->mb_types_stats));
177 memcpy(model->vector_fdv, vp6_def_fdv_vector_model, sizeof(model->vector_fdv));
178 memcpy(model->vector_pdv, vp6_def_pdv_vector_model, sizeof(model->vector_pdv));
179 memcpy(model->coeff_runv, vp6_def_runv_coeff_model, sizeof(model->coeff_runv));
180 memcpy(model->coeff_reorder, vp6_def_coeff_reorder, sizeof(model->coeff_reorder));
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181
182 vp6_coeff_order_table_init(s);
183}
184
3d52bca6 185static void vp6_parse_vector_models(VP56Context *s)
5ce117c3 186{
3d52bca6 187 VP56RangeCoder *c = &s->c;
d887151d 188 VP56Model *model = s->modelp;
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189 int comp, node;
190
191 for (comp=0; comp<2; comp++) {
192 if (vp56_rac_get_prob(c, vp6_sig_dct_pct[comp][0]))
247df384 193 model->vector_dct[comp] = vp56_rac_gets_nn(c, 7);
5ce117c3 194 if (vp56_rac_get_prob(c, vp6_sig_dct_pct[comp][1]))
247df384 195 model->vector_sig[comp] = vp56_rac_gets_nn(c, 7);
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196 }
197
198 for (comp=0; comp<2; comp++)
199 for (node=0; node<7; node++)
200 if (vp56_rac_get_prob(c, vp6_pdv_pct[comp][node]))
247df384 201 model->vector_pdv[comp][node] = vp56_rac_gets_nn(c, 7);
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202
203 for (comp=0; comp<2; comp++)
204 for (node=0; node<8; node++)
205 if (vp56_rac_get_prob(c, vp6_fdv_pct[comp][node]))
247df384 206 model->vector_fdv[comp][node] = vp56_rac_gets_nn(c, 7);
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207}
208
d47f1607 209/* nodes must ascend by count, but with descending symbol order */
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210static int vp6_huff_cmp(const void *va, const void *vb)
211{
212 const Node *a = va, *b = vb;
d47f1607 213 return (a->count - b->count)*16 + (b->sym - a->sym);
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214}
215
3d52bca6 216static void vp6_build_huff_tree(VP56Context *s, uint8_t coeff_model[],
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217 const uint8_t *map, unsigned size, VLC *vlc)
218{
796cea09 219 Node nodes[2*VP6_MAX_HUFF_SIZE], *tmp = &nodes[size];
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220 int a, b, i;
221
222 /* first compute probabilities from model */
223 tmp[0].count = 256;
224 for (i=0; i<size-1; i++) {
225 a = tmp[i].count * coeff_model[i] >> 8;
226 b = tmp[i].count * (255 - coeff_model[i]) >> 8;
227 nodes[map[2*i ]].count = a + !a;
228 nodes[map[2*i+1]].count = b + !b;
229 }
230
0a41faa9 231 free_vlc(vlc);
f28b1048 232 /* then build the huffman tree accodring to probabilities */
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233 ff_huff_build_tree(s->avctx, vlc, size, nodes, vp6_huff_cmp,
234 FF_HUFFMAN_FLAG_HNODE_FIRST);
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235}
236
3d52bca6 237static void vp6_parse_coeff_models(VP56Context *s)
5ce117c3 238{
3d52bca6 239 VP56RangeCoder *c = &s->c;
d887151d 240 VP56Model *model = s->modelp;
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241 int def_prob[11];
242 int node, cg, ctx, pos;
243 int ct; /* code type */
244 int pt; /* plane type (0 for Y, 1 for U or V) */
245
246 memset(def_prob, 0x80, sizeof(def_prob));
247
248 for (pt=0; pt<2; pt++)
249 for (node=0; node<11; node++)
250 if (vp56_rac_get_prob(c, vp6_dccv_pct[pt][node])) {
251 def_prob[node] = vp56_rac_gets_nn(c, 7);
247df384 252 model->coeff_dccv[pt][node] = def_prob[node];
704a2881 253 } else if (s->framep[VP56_FRAME_CURRENT]->key_frame) {
247df384 254 model->coeff_dccv[pt][node] = def_prob[node];
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255 }
256
257 if (vp56_rac_get(c)) {
258 for (pos=1; pos<64; pos++)
259 if (vp56_rac_get_prob(c, vp6_coeff_reorder_pct[pos]))
247df384 260 model->coeff_reorder[pos] = vp56_rac_gets(c, 4);
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261 vp6_coeff_order_table_init(s);
262 }
263
264 for (cg=0; cg<2; cg++)
265 for (node=0; node<14; node++)
266 if (vp56_rac_get_prob(c, vp6_runv_pct[cg][node]))
247df384 267 model->coeff_runv[cg][node] = vp56_rac_gets_nn(c, 7);
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268
269 for (ct=0; ct<3; ct++)
270 for (pt=0; pt<2; pt++)
271 for (cg=0; cg<6; cg++)
272 for (node=0; node<11; node++)
273 if (vp56_rac_get_prob(c, vp6_ract_pct[ct][pt][cg][node])) {
274 def_prob[node] = vp56_rac_gets_nn(c, 7);
247df384 275 model->coeff_ract[pt][ct][cg][node] = def_prob[node];
704a2881 276 } else if (s->framep[VP56_FRAME_CURRENT]->key_frame) {
247df384 277 model->coeff_ract[pt][ct][cg][node] = def_prob[node];
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278 }
279
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280 if (s->use_huffman) {
281 for (pt=0; pt<2; pt++) {
282 vp6_build_huff_tree(s, model->coeff_dccv[pt],
283 vp6_huff_coeff_map, 12, &s->dccv_vlc[pt]);
284 vp6_build_huff_tree(s, model->coeff_runv[pt],
285 vp6_huff_run_map, 9, &s->runv_vlc[pt]);
286 for (ct=0; ct<3; ct++)
287 for (cg = 0; cg < 6; cg++)
288 vp6_build_huff_tree(s, model->coeff_ract[pt][ct][cg],
289 vp6_huff_coeff_map, 12,
290 &s->ract_vlc[pt][ct][cg]);
291 }
292 memset(s->nb_null, 0, sizeof(s->nb_null));
293 } else {
247df384 294 /* coeff_dcct is a linear combination of coeff_dccv */
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295 for (pt=0; pt<2; pt++)
296 for (ctx=0; ctx<3; ctx++)
297 for (node=0; node<5; node++)
247df384 298 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 299 }
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300}
301
3d52bca6 302static void vp6_parse_vector_adjustment(VP56Context *s, VP56mv *vect)
5ce117c3 303{
3d52bca6 304 VP56RangeCoder *c = &s->c;
d887151d 305 VP56Model *model = s->modelp;
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306 int comp;
307
3d52bca6 308 *vect = (VP56mv) {0,0};
5ce117c3 309 if (s->vector_candidate_pos < 2)
d120e402 310 *vect = s->vector_candidate[0];
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311
312 for (comp=0; comp<2; comp++) {
313 int i, delta = 0;
314
247df384 315 if (vp56_rac_get_prob(c, model->vector_dct[comp])) {
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316 static const uint8_t prob_order[] = {0, 1, 2, 7, 6, 5, 4};
317 for (i=0; i<sizeof(prob_order); i++) {
318 int j = prob_order[i];
247df384 319 delta |= vp56_rac_get_prob(c, model->vector_fdv[comp][j])<<j;
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320 }
321 if (delta & 0xF0)
247df384 322 delta |= vp56_rac_get_prob(c, model->vector_fdv[comp][3])<<3;
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323 else
324 delta |= 8;
325 } else {
326 delta = vp56_rac_get_tree(c, vp56_pva_tree,
247df384 327 model->vector_pdv[comp]);
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328 }
329
247df384 330 if (delta && vp56_rac_get_prob(c, model->vector_sig[comp]))
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331 delta = -delta;
332
333 if (!comp)
d120e402 334 vect->x += delta;
5ce117c3 335 else
d120e402 336 vect->y += delta;
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337 }
338}
339
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340/**
341 * Read number of consecutive blocks with null DC or AC.
342 * This value is < 74.
343 */
3d52bca6 344static unsigned vp6_get_nb_null(VP56Context *s)
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345{
346 unsigned val = get_bits(&s->gb, 2);
347 if (val == 2)
348 val += get_bits(&s->gb, 2);
349 else if (val == 3) {
350 val = get_bits1(&s->gb) << 2;
351 val = 6+val + get_bits(&s->gb, 2+val);
352 }
353 return val;
354}
355
3d52bca6 356static void vp6_parse_coeff_huffman(VP56Context *s)
f28b1048 357{
d887151d 358 VP56Model *model = s->modelp;
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359 uint8_t *permute = s->scantable.permutated;
360 VLC *vlc_coeff;
361 int coeff, sign, coeff_idx;
362 int b, cg, idx;
363 int pt = 0; /* plane type (0 for Y, 1 for U or V) */
364
365 for (b=0; b<6; b++) {
366 int ct = 0; /* code type */
367 if (b > 3) pt = 1;
368 vlc_coeff = &s->dccv_vlc[pt];
369
370 for (coeff_idx=0; coeff_idx<64; ) {
371 int run = 1;
372 if (coeff_idx<2 && s->nb_null[coeff_idx][pt]) {
373 s->nb_null[coeff_idx][pt]--;
374 if (coeff_idx)
375 break;
376 } else {
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377 if (get_bits_count(&s->gb) >= s->gb.size_in_bits)
378 return;
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379 coeff = get_vlc2(&s->gb, vlc_coeff->table, 9, 3);
380 if (coeff == 0) {
381 if (coeff_idx) {
382 int pt = (coeff_idx >= 6);
383 run += get_vlc2(&s->gb, s->runv_vlc[pt].table, 9, 3);
384 if (run >= 9)
385 run += get_bits(&s->gb, 6);
386 } else
387 s->nb_null[0][pt] = vp6_get_nb_null(s);
388 ct = 0;
389 } else if (coeff == 11) { /* end of block */
390 if (coeff_idx == 1) /* first AC coeff ? */
391 s->nb_null[1][pt] = vp6_get_nb_null(s);
392 break;
393 } else {
394 int coeff2 = vp56_coeff_bias[coeff];
395 if (coeff > 4)
396 coeff2 += get_bits(&s->gb, coeff <= 9 ? coeff - 4 : 11);
397 ct = 1 + (coeff2 > 1);
398 sign = get_bits1(&s->gb);
399 coeff2 = (coeff2 ^ -sign) + sign;
400 if (coeff_idx)
401 coeff2 *= s->dequant_ac;
402 idx = model->coeff_index_to_pos[coeff_idx];
403 s->block_coeff[b][permute[idx]] = coeff2;
404 }
405 }
406 coeff_idx+=run;
407 cg = FFMIN(vp6_coeff_groups[coeff_idx], 3);
408 vlc_coeff = &s->ract_vlc[pt][ct][cg];
409 }
410 }
411}
412
3d52bca6 413static void vp6_parse_coeff(VP56Context *s)
5ce117c3 414{
3d52bca6 415 VP56RangeCoder *c = s->ccp;
d887151d 416 VP56Model *model = s->modelp;
5ce117c3 417 uint8_t *permute = s->scantable.permutated;
247df384 418 uint8_t *model1, *model2, *model3;
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419 int coeff, sign, coeff_idx;
420 int b, i, cg, idx, ctx;
421 int pt = 0; /* plane type (0 for Y, 1 for U or V) */
422
423 for (b=0; b<6; b++) {
424 int ct = 1; /* code type */
425 int run = 1;
426
427 if (b > 3) pt = 1;
428
429 ctx = s->left_block[vp56_b6to4[b]].not_null_dc
430 + s->above_blocks[s->above_block_idx[b]].not_null_dc;
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431 model1 = model->coeff_dccv[pt];
432 model2 = model->coeff_dcct[pt][ctx];
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433
434 for (coeff_idx=0; coeff_idx<64; ) {
435 if ((coeff_idx>1 && ct==0) || vp56_rac_get_prob(c, model2[0])) {
436 /* parse a coeff */
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437 if (vp56_rac_get_prob(c, model2[2])) {
438 if (vp56_rac_get_prob(c, model2[3])) {
247df384 439 idx = vp56_rac_get_tree(c, vp56_pc_tree, model1);
f28b1048 440 coeff = vp56_coeff_bias[idx+5];
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441 for (i=vp56_coeff_bit_length[idx]; i>=0; i--)
442 coeff += vp56_rac_get_prob(c, vp56_coeff_parse_table[idx][i]) << i;
443 } else {
444 if (vp56_rac_get_prob(c, model2[4]))
247df384 445 coeff = 3 + vp56_rac_get_prob(c, model1[5]);
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446 else
447 coeff = 2;
448 }
449 ct = 2;
450 } else {
451 ct = 1;
452 coeff = 1;
453 }
454 sign = vp56_rac_get(c);
455 coeff = (coeff ^ -sign) + sign;
456 if (coeff_idx)
457 coeff *= s->dequant_ac;
247df384 458 idx = model->coeff_index_to_pos[coeff_idx];
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459 s->block_coeff[b][permute[idx]] = coeff;
460 run = 1;
461 } else {
462 /* parse a run */
463 ct = 0;
4b8419aa 464 if (coeff_idx > 0) {
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465 if (!vp56_rac_get_prob(c, model2[1]))
466 break;
467
247df384 468 model3 = model->coeff_runv[coeff_idx >= 6];
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469 run = vp56_rac_get_tree(c, vp6_pcr_tree, model3);
470 if (!run)
471 for (run=9, i=0; i<6; i++)
472 run += vp56_rac_get_prob(c, model3[i+8]) << i;
473 }
474 }
475
476 cg = vp6_coeff_groups[coeff_idx+=run];
247df384 477 model1 = model2 = model->coeff_ract[pt][ct][cg];
5ce117c3 478 }
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479
480 s->left_block[vp56_b6to4[b]].not_null_dc =
481 s->above_blocks[s->above_block_idx[b]].not_null_dc = !!s->block_coeff[b][0];
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482 }
483}
484
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485static int vp6_block_variance(uint8_t *src, int stride)
486{
487 int sum = 0, square_sum = 0;
488 int y, x;
489
490 for (y=0; y<8; y+=2) {
491 for (x=0; x<8; x+=2) {
492 sum += src[x];
493 square_sum += src[x]*src[x];
494 }
495 src += 2*stride;
496 }
c29ff23c 497 return (16*square_sum - sum*sum) >> 8;
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498}
499
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500static void vp6_filter_hv4(uint8_t *dst, uint8_t *src, int stride,
501 int delta, const int16_t *weights)
502{
503 int x, y;
504
505 for (y=0; y<8; y++) {
506 for (x=0; x<8; x++) {
f66e4f5f 507 dst[x] = av_clip_uint8(( src[x-delta ] * weights[0]
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508 + src[x ] * weights[1]
509 + src[x+delta ] * weights[2]
510 + src[x+2*delta] * weights[3] + 64) >> 7);
511 }
512 src += stride;
513 dst += stride;
514 }
515}
516
3d52bca6 517static void vp6_filter_diag2(VP56Context *s, uint8_t *dst, uint8_t *src,
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518 int stride, int h_weight, int v_weight)
519{
520 uint8_t *tmp = s->edge_emu_buffer+16;
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521 s->dsp.put_h264_chroma_pixels_tab[0](tmp, src, stride, 9, h_weight, 0);
522 s->dsp.put_h264_chroma_pixels_tab[0](dst, tmp, stride, 8, 0, v_weight);
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523}
524
3d52bca6 525static void vp6_filter(VP56Context *s, uint8_t *dst, uint8_t *src,
5ce117c3 526 int offset1, int offset2, int stride,
3d52bca6 527 VP56mv mv, int mask, int select, int luma)
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528{
529 int filter4 = 0;
530 int x8 = mv.x & mask;
531 int y8 = mv.y & mask;
532
533 if (luma) {
534 x8 *= 2;
535 y8 *= 2;
536 filter4 = s->filter_mode;
537 if (filter4 == 2) {
538 if (s->max_vector_length &&
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539 (FFABS(mv.x) > s->max_vector_length ||
540 FFABS(mv.y) > s->max_vector_length)) {
5ce117c3 541 filter4 = 0;
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542 } else if (s->sample_variance_threshold
543 && (vp6_block_variance(src+offset1, stride)
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544 < s->sample_variance_threshold)) {
545 filter4 = 0;
546 }
547 }
548 }
549
550 if ((y8 && (offset2-offset1)*s->flip<0) || (!y8 && offset1 > offset2)) {
551 offset1 = offset2;
552 }
553
554 if (filter4) {
555 if (!y8) { /* left or right combine */
556 vp6_filter_hv4(dst, src+offset1, stride, 1,
557 vp6_block_copy_filter[select][x8]);
558 } else if (!x8) { /* above or below combine */
559 vp6_filter_hv4(dst, src+offset1, stride, stride,
560 vp6_block_copy_filter[select][y8]);
cd66ddb6 561 } else {
3a088514 562 s->vp56dsp.vp6_filter_diag4(dst, src+offset1+((mv.x^mv.y)>>31), stride,
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563 vp6_block_copy_filter[select][x8],
564 vp6_block_copy_filter[select][y8]);
565 }
566 } else {
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567 if (!x8 || !y8) {
568 s->dsp.put_h264_chroma_pixels_tab[0](dst, src+offset1, stride, 8, x8, y8);
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569 } else {
570 vp6_filter_diag2(s, dst, src+offset1 + ((mv.x^mv.y)>>31), stride, x8, y8);
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571 }
572 }
573}
574
98a6fff9 575static av_cold int vp6_decode_init(AVCodecContext *avctx)
5ce117c3 576{
3d52bca6 577 VP56Context *s = avctx->priv_data;
5ce117c3 578
d9504970 579 ff_vp56_init(avctx, avctx->codec->id == CODEC_ID_VP6,
52fa2054 580 avctx->codec->id == CODEC_ID_VP6A);
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581 s->vp56_coord_div = vp6_coord_div;
582 s->parse_vector_adjustment = vp6_parse_vector_adjustment;
5ce117c3 583 s->filter = vp6_filter;
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584 s->default_models_init = vp6_default_models_init;
585 s->parse_vector_models = vp6_parse_vector_models;
586 s->parse_coeff_models = vp6_parse_coeff_models;
587 s->parse_header = vp6_parse_header;
588
589 return 0;
590}
591
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592static av_cold int vp6_decode_free(AVCodecContext *avctx)
593{
594 VP56Context *s = avctx->priv_data;
595 int pt, ct, cg;
596
d9504970 597 ff_vp56_free(avctx);
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598
599 for (pt=0; pt<2; pt++) {
600 free_vlc(&s->dccv_vlc[pt]);
601 free_vlc(&s->runv_vlc[pt]);
602 for (ct=0; ct<3; ct++)
603 for (cg=0; cg<6; cg++)
604 free_vlc(&s->ract_vlc[pt][ct][cg]);
605 }
606 return 0;
607}
608
d36beb3f 609AVCodec ff_vp6_decoder = {
5ce117c3 610 "vp6",
72415b2a 611 AVMEDIA_TYPE_VIDEO,
5ce117c3 612 CODEC_ID_VP6,
3d52bca6 613 sizeof(VP56Context),
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614 vp6_decode_init,
615 NULL,
ded2100e 616 vp6_decode_free,
d9504970 617 ff_vp56_decode_frame,
75f6cc26 618 CODEC_CAP_DR1,
fe4bf374 619 .long_name = NULL_IF_CONFIG_SMALL("On2 VP6"),
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620};
621
622/* flash version, not flipped upside-down */
d36beb3f 623AVCodec ff_vp6f_decoder = {
5ce117c3 624 "vp6f",
72415b2a 625 AVMEDIA_TYPE_VIDEO,
5ce117c3 626 CODEC_ID_VP6F,
3d52bca6 627 sizeof(VP56Context),
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628 vp6_decode_init,
629 NULL,
ded2100e 630 vp6_decode_free,
d9504970 631 ff_vp56_decode_frame,
75f6cc26 632 CODEC_CAP_DR1,
fe4bf374 633 .long_name = NULL_IF_CONFIG_SMALL("On2 VP6 (Flash version)"),
5ce117c3 634};
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635
636/* flash version, not flipped upside-down, with alpha channel */
d36beb3f 637AVCodec ff_vp6a_decoder = {
91fc2cf1 638 "vp6a",
72415b2a 639 AVMEDIA_TYPE_VIDEO,
91fc2cf1 640 CODEC_ID_VP6A,
3d52bca6 641 sizeof(VP56Context),
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642 vp6_decode_init,
643 NULL,
ded2100e 644 vp6_decode_free,
d9504970 645 ff_vp56_decode_frame,
91fc2cf1 646 CODEC_CAP_DR1,
fe4bf374 647 .long_name = NULL_IF_CONFIG_SMALL("On2 VP6 (Flash version, with alpha channel)"),
91fc2cf1 648};