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1 | /* |
2 | * Copyright (C) 2006 Aurelien Jacobs <aurel@gnuage.org> | |
3 | * | |
4 | * This file is part of FFmpeg. | |
5 | * | |
6 | * FFmpeg is free software; you can redistribute it and/or | |
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 | * | |
11 | * FFmpeg is distributed in the hope that it will be useful, | |
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 | |
17 | * License along with FFmpeg; if not, write to the Free Software | |
18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
19 | */ | |
20 | ||
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 | ||
30 | #include <stdlib.h> | |
31 | ||
32 | #include "avcodec.h" | |
33 | #include "get_bits.h" | |
34 | #include "huffman.h" | |
35 | #include "internal.h" | |
36 | ||
37 | #include "vp56.h" | |
38 | #include "vp56data.h" | |
39 | #include "vp6data.h" | |
40 | ||
41 | #define VP6_MAX_HUFF_SIZE 12 | |
42 | ||
43 | static void vp6_parse_coeff(VP56Context *s); | |
44 | static void vp6_parse_coeff_huffman(VP56Context *s); | |
45 | ||
46 | static int vp6_parse_header(VP56Context *s, const uint8_t *buf, int buf_size) | |
47 | { | |
48 | VP56RangeCoder *c = &s->c; | |
49 | int parse_filter_info = 0; | |
50 | int coeff_offset = 0; | |
51 | int vrt_shift = 0; | |
52 | int sub_version; | |
53 | int rows, cols; | |
54 | int res = 0; | |
55 | int separated_coeff = buf[0] & 1; | |
56 | ||
57 | s->frames[VP56_FRAME_CURRENT]->key_frame = !(buf[0] & 0x80); | |
58 | ff_vp56_init_dequant(s, (buf[0] >> 1) & 0x3F); | |
59 | ||
60 | if (s->frames[VP56_FRAME_CURRENT]->key_frame) { | |
61 | sub_version = buf[1] >> 3; | |
62 | if (sub_version > 8) | |
63 | return AVERROR_INVALIDDATA; | |
64 | s->filter_header = buf[1] & 0x06; | |
65 | if (buf[1] & 1) { | |
66 | avpriv_report_missing_feature(s->avctx, "Interlacing"); | |
67 | return AVERROR_PATCHWELCOME; | |
68 | } | |
69 | if (separated_coeff || !s->filter_header) { | |
70 | coeff_offset = AV_RB16(buf+2) - 2; | |
71 | buf += 2; | |
72 | buf_size -= 2; | |
73 | } | |
74 | ||
75 | rows = buf[2]; /* number of stored macroblock rows */ | |
76 | cols = buf[3]; /* number of stored macroblock cols */ | |
77 | /* buf[4] is number of displayed macroblock rows */ | |
78 | /* buf[5] is number of displayed macroblock cols */ | |
79 | if (!rows || !cols) { | |
80 | av_log(s->avctx, AV_LOG_ERROR, "Invalid size %dx%d\n", cols << 4, rows << 4); | |
81 | return AVERROR_INVALIDDATA; | |
82 | } | |
83 | ||
84 | if (!s->macroblocks || /* first frame */ | |
85 | 16*cols != s->avctx->coded_width || | |
86 | 16*rows != s->avctx->coded_height) { | |
87 | if (s->avctx->extradata_size == 0 && | |
88 | FFALIGN(s->avctx->width, 16) == 16 * cols && | |
89 | FFALIGN(s->avctx->height, 16) == 16 * rows) { | |
90 | // We assume this is properly signalled container cropping, | |
91 | // in an F4V file. Just set the coded_width/height, don't | |
92 | // touch the cropped ones. | |
93 | s->avctx->coded_width = 16 * cols; | |
94 | s->avctx->coded_height = 16 * rows; | |
95 | } else { | |
96 | int ret = ff_set_dimensions(s->avctx, 16 * cols, 16 * rows); | |
97 | if (ret < 0) | |
98 | return ret; | |
99 | ||
100 | if (s->avctx->extradata_size == 1) { | |
101 | s->avctx->width -= s->avctx->extradata[0] >> 4; | |
102 | s->avctx->height -= s->avctx->extradata[0] & 0x0F; | |
103 | } | |
104 | } | |
105 | res = VP56_SIZE_CHANGE; | |
106 | } | |
107 | ||
108 | ff_vp56_init_range_decoder(c, buf+6, buf_size-6); | |
109 | vp56_rac_gets(c, 2); | |
110 | ||
111 | parse_filter_info = s->filter_header; | |
112 | if (sub_version < 8) | |
113 | vrt_shift = 5; | |
114 | s->sub_version = sub_version; | |
115 | s->golden_frame = 0; | |
116 | } else { | |
117 | if (!s->sub_version || !s->avctx->coded_width || !s->avctx->coded_height) | |
118 | return AVERROR_INVALIDDATA; | |
119 | ||
120 | if (separated_coeff || !s->filter_header) { | |
121 | coeff_offset = AV_RB16(buf+1) - 2; | |
122 | buf += 2; | |
123 | buf_size -= 2; | |
124 | } | |
125 | ff_vp56_init_range_decoder(c, buf+1, buf_size-1); | |
126 | ||
127 | s->golden_frame = vp56_rac_get(c); | |
128 | if (s->filter_header) { | |
129 | s->deblock_filtering = vp56_rac_get(c); | |
130 | if (s->deblock_filtering) | |
131 | vp56_rac_get(c); | |
132 | if (s->sub_version > 7) | |
133 | parse_filter_info = vp56_rac_get(c); | |
134 | } | |
135 | } | |
136 | ||
137 | if (parse_filter_info) { | |
138 | if (vp56_rac_get(c)) { | |
139 | s->filter_mode = 2; | |
140 | s->sample_variance_threshold = vp56_rac_gets(c, 5) << vrt_shift; | |
141 | s->max_vector_length = 2 << vp56_rac_gets(c, 3); | |
142 | } else if (vp56_rac_get(c)) { | |
143 | s->filter_mode = 1; | |
144 | } else { | |
145 | s->filter_mode = 0; | |
146 | } | |
147 | if (s->sub_version > 7) | |
148 | s->filter_selection = vp56_rac_gets(c, 4); | |
149 | else | |
150 | s->filter_selection = 16; | |
151 | } | |
152 | ||
153 | s->use_huffman = vp56_rac_get(c); | |
154 | ||
155 | s->parse_coeff = vp6_parse_coeff; | |
156 | if (coeff_offset) { | |
157 | buf += coeff_offset; | |
158 | buf_size -= coeff_offset; | |
159 | if (buf_size < 0) { | |
160 | if (s->frames[VP56_FRAME_CURRENT]->key_frame) | |
161 | ff_set_dimensions(s->avctx, 0, 0); | |
162 | return AVERROR_INVALIDDATA; | |
163 | } | |
164 | if (s->use_huffman) { | |
165 | s->parse_coeff = vp6_parse_coeff_huffman; | |
166 | init_get_bits(&s->gb, buf, buf_size<<3); | |
167 | } else { | |
168 | ff_vp56_init_range_decoder(&s->cc, buf, buf_size); | |
169 | s->ccp = &s->cc; | |
170 | } | |
171 | } else { | |
172 | s->ccp = &s->c; | |
173 | } | |
174 | ||
175 | return res; | |
176 | } | |
177 | ||
178 | static void vp6_coeff_order_table_init(VP56Context *s) | |
179 | { | |
180 | int i, pos, idx = 1; | |
181 | ||
182 | s->modelp->coeff_index_to_pos[0] = 0; | |
183 | for (i=0; i<16; i++) | |
184 | for (pos=1; pos<64; pos++) | |
185 | if (s->modelp->coeff_reorder[pos] == i) | |
186 | s->modelp->coeff_index_to_pos[idx++] = pos; | |
187 | } | |
188 | ||
189 | static void vp6_default_models_init(VP56Context *s) | |
190 | { | |
191 | VP56Model *model = s->modelp; | |
192 | ||
193 | model->vector_dct[0] = 0xA2; | |
194 | model->vector_dct[1] = 0xA4; | |
195 | model->vector_sig[0] = 0x80; | |
196 | model->vector_sig[1] = 0x80; | |
197 | ||
198 | memcpy(model->mb_types_stats, ff_vp56_def_mb_types_stats, sizeof(model->mb_types_stats)); | |
199 | memcpy(model->vector_fdv, vp6_def_fdv_vector_model, sizeof(model->vector_fdv)); | |
200 | memcpy(model->vector_pdv, vp6_def_pdv_vector_model, sizeof(model->vector_pdv)); | |
201 | memcpy(model->coeff_runv, vp6_def_runv_coeff_model, sizeof(model->coeff_runv)); | |
202 | memcpy(model->coeff_reorder, vp6_def_coeff_reorder, sizeof(model->coeff_reorder)); | |
203 | ||
204 | vp6_coeff_order_table_init(s); | |
205 | } | |
206 | ||
207 | static void vp6_parse_vector_models(VP56Context *s) | |
208 | { | |
209 | VP56RangeCoder *c = &s->c; | |
210 | VP56Model *model = s->modelp; | |
211 | int comp, node; | |
212 | ||
213 | for (comp=0; comp<2; comp++) { | |
214 | if (vp56_rac_get_prob_branchy(c, vp6_sig_dct_pct[comp][0])) | |
215 | model->vector_dct[comp] = vp56_rac_gets_nn(c, 7); | |
216 | if (vp56_rac_get_prob_branchy(c, vp6_sig_dct_pct[comp][1])) | |
217 | model->vector_sig[comp] = vp56_rac_gets_nn(c, 7); | |
218 | } | |
219 | ||
220 | for (comp=0; comp<2; comp++) | |
221 | for (node=0; node<7; node++) | |
222 | if (vp56_rac_get_prob_branchy(c, vp6_pdv_pct[comp][node])) | |
223 | model->vector_pdv[comp][node] = vp56_rac_gets_nn(c, 7); | |
224 | ||
225 | for (comp=0; comp<2; comp++) | |
226 | for (node=0; node<8; node++) | |
227 | if (vp56_rac_get_prob_branchy(c, vp6_fdv_pct[comp][node])) | |
228 | model->vector_fdv[comp][node] = vp56_rac_gets_nn(c, 7); | |
229 | } | |
230 | ||
231 | /* nodes must ascend by count, but with descending symbol order */ | |
232 | static int vp6_huff_cmp(const void *va, const void *vb) | |
233 | { | |
234 | const Node *a = va, *b = vb; | |
235 | return (a->count - b->count)*16 + (b->sym - a->sym); | |
236 | } | |
237 | ||
238 | static int vp6_build_huff_tree(VP56Context *s, uint8_t coeff_model[], | |
239 | const uint8_t *map, unsigned size, VLC *vlc) | |
240 | { | |
241 | Node nodes[2*VP6_MAX_HUFF_SIZE], *tmp = &nodes[size]; | |
242 | int a, b, i; | |
243 | ||
244 | /* first compute probabilities from model */ | |
245 | tmp[0].count = 256; | |
246 | for (i=0; i<size-1; i++) { | |
247 | a = tmp[i].count * coeff_model[i] >> 8; | |
248 | b = tmp[i].count * (255 - coeff_model[i]) >> 8; | |
249 | nodes[map[2*i ]].count = a + !a; | |
250 | nodes[map[2*i+1]].count = b + !b; | |
251 | } | |
252 | ||
253 | ff_free_vlc(vlc); | |
254 | /* then build the huffman tree according to probabilities */ | |
255 | return ff_huff_build_tree(s->avctx, vlc, size, FF_HUFFMAN_BITS, | |
256 | nodes, vp6_huff_cmp, | |
257 | FF_HUFFMAN_FLAG_HNODE_FIRST); | |
258 | } | |
259 | ||
260 | static int vp6_parse_coeff_models(VP56Context *s) | |
261 | { | |
262 | VP56RangeCoder *c = &s->c; | |
263 | VP56Model *model = s->modelp; | |
264 | int def_prob[11]; | |
265 | int node, cg, ctx, pos; | |
266 | int ct; /* code type */ | |
267 | int pt; /* plane type (0 for Y, 1 for U or V) */ | |
268 | ||
269 | memset(def_prob, 0x80, sizeof(def_prob)); | |
270 | ||
271 | for (pt=0; pt<2; pt++) | |
272 | for (node=0; node<11; node++) | |
273 | if (vp56_rac_get_prob_branchy(c, vp6_dccv_pct[pt][node])) { | |
274 | def_prob[node] = vp56_rac_gets_nn(c, 7); | |
275 | model->coeff_dccv[pt][node] = def_prob[node]; | |
276 | } else if (s->frames[VP56_FRAME_CURRENT]->key_frame) { | |
277 | model->coeff_dccv[pt][node] = def_prob[node]; | |
278 | } | |
279 | ||
280 | if (vp56_rac_get(c)) { | |
281 | for (pos=1; pos<64; pos++) | |
282 | if (vp56_rac_get_prob_branchy(c, vp6_coeff_reorder_pct[pos])) | |
283 | model->coeff_reorder[pos] = vp56_rac_gets(c, 4); | |
284 | vp6_coeff_order_table_init(s); | |
285 | } | |
286 | ||
287 | for (cg=0; cg<2; cg++) | |
288 | for (node=0; node<14; node++) | |
289 | if (vp56_rac_get_prob_branchy(c, vp6_runv_pct[cg][node])) | |
290 | model->coeff_runv[cg][node] = vp56_rac_gets_nn(c, 7); | |
291 | ||
292 | for (ct=0; ct<3; ct++) | |
293 | for (pt=0; pt<2; pt++) | |
294 | for (cg=0; cg<6; cg++) | |
295 | for (node=0; node<11; node++) | |
296 | if (vp56_rac_get_prob_branchy(c, vp6_ract_pct[ct][pt][cg][node])) { | |
297 | def_prob[node] = vp56_rac_gets_nn(c, 7); | |
298 | model->coeff_ract[pt][ct][cg][node] = def_prob[node]; | |
299 | } else if (s->frames[VP56_FRAME_CURRENT]->key_frame) { | |
300 | model->coeff_ract[pt][ct][cg][node] = def_prob[node]; | |
301 | } | |
302 | ||
303 | if (s->use_huffman) { | |
304 | for (pt=0; pt<2; pt++) { | |
305 | if (vp6_build_huff_tree(s, model->coeff_dccv[pt], | |
306 | vp6_huff_coeff_map, 12, &s->dccv_vlc[pt])) | |
307 | return -1; | |
308 | if (vp6_build_huff_tree(s, model->coeff_runv[pt], | |
309 | vp6_huff_run_map, 9, &s->runv_vlc[pt])) | |
310 | return -1; | |
311 | for (ct=0; ct<3; ct++) | |
312 | for (cg = 0; cg < 6; cg++) | |
313 | if (vp6_build_huff_tree(s, model->coeff_ract[pt][ct][cg], | |
314 | vp6_huff_coeff_map, 12, | |
315 | &s->ract_vlc[pt][ct][cg])) | |
316 | return -1; | |
317 | } | |
318 | memset(s->nb_null, 0, sizeof(s->nb_null)); | |
319 | } else { | |
320 | /* coeff_dcct is a linear combination of coeff_dccv */ | |
321 | for (pt=0; pt<2; pt++) | |
322 | for (ctx=0; ctx<3; ctx++) | |
323 | for (node=0; node<5; node++) | |
324 | 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); | |
325 | } | |
326 | return 0; | |
327 | } | |
328 | ||
329 | static void vp6_parse_vector_adjustment(VP56Context *s, VP56mv *vect) | |
330 | { | |
331 | VP56RangeCoder *c = &s->c; | |
332 | VP56Model *model = s->modelp; | |
333 | int comp; | |
334 | ||
335 | *vect = (VP56mv) {0,0}; | |
336 | if (s->vector_candidate_pos < 2) | |
337 | *vect = s->vector_candidate[0]; | |
338 | ||
339 | for (comp=0; comp<2; comp++) { | |
340 | int i, delta = 0; | |
341 | ||
342 | if (vp56_rac_get_prob_branchy(c, model->vector_dct[comp])) { | |
343 | static const uint8_t prob_order[] = {0, 1, 2, 7, 6, 5, 4}; | |
344 | for (i=0; i<sizeof(prob_order); i++) { | |
345 | int j = prob_order[i]; | |
346 | delta |= vp56_rac_get_prob(c, model->vector_fdv[comp][j])<<j; | |
347 | } | |
348 | if (delta & 0xF0) | |
349 | delta |= vp56_rac_get_prob(c, model->vector_fdv[comp][3])<<3; | |
350 | else | |
351 | delta |= 8; | |
352 | } else { | |
353 | delta = vp56_rac_get_tree(c, ff_vp56_pva_tree, | |
354 | model->vector_pdv[comp]); | |
355 | } | |
356 | ||
357 | if (delta && vp56_rac_get_prob_branchy(c, model->vector_sig[comp])) | |
358 | delta = -delta; | |
359 | ||
360 | if (!comp) | |
361 | vect->x += delta; | |
362 | else | |
363 | vect->y += delta; | |
364 | } | |
365 | } | |
366 | ||
367 | /** | |
368 | * Read number of consecutive blocks with null DC or AC. | |
369 | * This value is < 74. | |
370 | */ | |
371 | static unsigned vp6_get_nb_null(VP56Context *s) | |
372 | { | |
373 | unsigned val = get_bits(&s->gb, 2); | |
374 | if (val == 2) | |
375 | val += get_bits(&s->gb, 2); | |
376 | else if (val == 3) { | |
377 | val = get_bits1(&s->gb) << 2; | |
378 | val = 6+val + get_bits(&s->gb, 2+val); | |
379 | } | |
380 | return val; | |
381 | } | |
382 | ||
383 | static void vp6_parse_coeff_huffman(VP56Context *s) | |
384 | { | |
385 | VP56Model *model = s->modelp; | |
386 | uint8_t *permute = s->idct_scantable; | |
387 | VLC *vlc_coeff; | |
388 | int coeff, sign, coeff_idx; | |
389 | int b, cg, idx; | |
390 | int pt = 0; /* plane type (0 for Y, 1 for U or V) */ | |
391 | ||
392 | for (b=0; b<6; b++) { | |
393 | int ct = 0; /* code type */ | |
394 | if (b > 3) pt = 1; | |
395 | vlc_coeff = &s->dccv_vlc[pt]; | |
396 | ||
397 | for (coeff_idx = 0;;) { | |
398 | int run = 1; | |
399 | if (coeff_idx<2 && s->nb_null[coeff_idx][pt]) { | |
400 | s->nb_null[coeff_idx][pt]--; | |
401 | if (coeff_idx) | |
402 | break; | |
403 | } else { | |
404 | if (get_bits_left(&s->gb) <= 0) | |
405 | return; | |
406 | coeff = get_vlc2(&s->gb, vlc_coeff->table, FF_HUFFMAN_BITS, 3); | |
407 | if (coeff == 0) { | |
408 | if (coeff_idx) { | |
409 | int pt = (coeff_idx >= 6); | |
410 | run += get_vlc2(&s->gb, s->runv_vlc[pt].table, FF_HUFFMAN_BITS, 3); | |
411 | if (run >= 9) | |
412 | run += get_bits(&s->gb, 6); | |
413 | } else | |
414 | s->nb_null[0][pt] = vp6_get_nb_null(s); | |
415 | ct = 0; | |
416 | } else if (coeff == 11) { /* end of block */ | |
417 | if (coeff_idx == 1) /* first AC coeff ? */ | |
418 | s->nb_null[1][pt] = vp6_get_nb_null(s); | |
419 | break; | |
420 | } else { | |
421 | int coeff2 = ff_vp56_coeff_bias[coeff]; | |
422 | if (coeff > 4) | |
423 | coeff2 += get_bits(&s->gb, coeff <= 9 ? coeff - 4 : 11); | |
424 | ct = 1 + (coeff2 > 1); | |
425 | sign = get_bits1(&s->gb); | |
426 | coeff2 = (coeff2 ^ -sign) + sign; | |
427 | if (coeff_idx) | |
428 | coeff2 *= s->dequant_ac; | |
429 | idx = model->coeff_index_to_pos[coeff_idx]; | |
430 | s->block_coeff[b][permute[idx]] = coeff2; | |
431 | } | |
432 | } | |
433 | coeff_idx+=run; | |
434 | if (coeff_idx >= 64) | |
435 | break; | |
436 | cg = FFMIN(vp6_coeff_groups[coeff_idx], 3); | |
437 | vlc_coeff = &s->ract_vlc[pt][ct][cg]; | |
438 | } | |
439 | } | |
440 | } | |
441 | ||
442 | static void vp6_parse_coeff(VP56Context *s) | |
443 | { | |
444 | VP56RangeCoder *c = s->ccp; | |
445 | VP56Model *model = s->modelp; | |
446 | uint8_t *permute = s->idct_scantable; | |
447 | uint8_t *model1, *model2, *model3; | |
448 | int coeff, sign, coeff_idx; | |
449 | int b, i, cg, idx, ctx; | |
450 | int pt = 0; /* plane type (0 for Y, 1 for U or V) */ | |
451 | ||
452 | for (b=0; b<6; b++) { | |
453 | int ct = 1; /* code type */ | |
454 | int run = 1; | |
455 | ||
456 | if (b > 3) pt = 1; | |
457 | ||
458 | ctx = s->left_block[ff_vp56_b6to4[b]].not_null_dc | |
459 | + s->above_blocks[s->above_block_idx[b]].not_null_dc; | |
460 | model1 = model->coeff_dccv[pt]; | |
461 | model2 = model->coeff_dcct[pt][ctx]; | |
462 | ||
463 | coeff_idx = 0; | |
464 | for (;;) { | |
465 | if ((coeff_idx>1 && ct==0) || vp56_rac_get_prob_branchy(c, model2[0])) { | |
466 | /* parse a coeff */ | |
467 | if (vp56_rac_get_prob_branchy(c, model2[2])) { | |
468 | if (vp56_rac_get_prob_branchy(c, model2[3])) { | |
469 | idx = vp56_rac_get_tree(c, ff_vp56_pc_tree, model1); | |
470 | coeff = ff_vp56_coeff_bias[idx+5]; | |
471 | for (i=ff_vp56_coeff_bit_length[idx]; i>=0; i--) | |
472 | coeff += vp56_rac_get_prob(c, ff_vp56_coeff_parse_table[idx][i]) << i; | |
473 | } else { | |
474 | if (vp56_rac_get_prob_branchy(c, model2[4])) | |
475 | coeff = 3 + vp56_rac_get_prob(c, model1[5]); | |
476 | else | |
477 | coeff = 2; | |
478 | } | |
479 | ct = 2; | |
480 | } else { | |
481 | ct = 1; | |
482 | coeff = 1; | |
483 | } | |
484 | sign = vp56_rac_get(c); | |
485 | coeff = (coeff ^ -sign) + sign; | |
486 | if (coeff_idx) | |
487 | coeff *= s->dequant_ac; | |
488 | idx = model->coeff_index_to_pos[coeff_idx]; | |
489 | s->block_coeff[b][permute[idx]] = coeff; | |
490 | run = 1; | |
491 | } else { | |
492 | /* parse a run */ | |
493 | ct = 0; | |
494 | if (coeff_idx > 0) { | |
495 | if (!vp56_rac_get_prob_branchy(c, model2[1])) | |
496 | break; | |
497 | ||
498 | model3 = model->coeff_runv[coeff_idx >= 6]; | |
499 | run = vp56_rac_get_tree(c, vp6_pcr_tree, model3); | |
500 | if (!run) | |
501 | for (run=9, i=0; i<6; i++) | |
502 | run += vp56_rac_get_prob(c, model3[i+8]) << i; | |
503 | } | |
504 | } | |
505 | coeff_idx += run; | |
506 | if (coeff_idx >= 64) | |
507 | break; | |
508 | cg = vp6_coeff_groups[coeff_idx]; | |
509 | model1 = model2 = model->coeff_ract[pt][ct][cg]; | |
510 | } | |
511 | ||
512 | s->left_block[ff_vp56_b6to4[b]].not_null_dc = | |
513 | s->above_blocks[s->above_block_idx[b]].not_null_dc = !!s->block_coeff[b][0]; | |
514 | } | |
515 | } | |
516 | ||
517 | static int vp6_block_variance(uint8_t *src, int stride) | |
518 | { | |
519 | int sum = 0, square_sum = 0; | |
520 | int y, x; | |
521 | ||
522 | for (y=0; y<8; y+=2) { | |
523 | for (x=0; x<8; x+=2) { | |
524 | sum += src[x]; | |
525 | square_sum += src[x]*src[x]; | |
526 | } | |
527 | src += 2*stride; | |
528 | } | |
529 | return (16*square_sum - sum*sum) >> 8; | |
530 | } | |
531 | ||
532 | static void vp6_filter_hv4(uint8_t *dst, uint8_t *src, int stride, | |
533 | int delta, const int16_t *weights) | |
534 | { | |
535 | int x, y; | |
536 | ||
537 | for (y=0; y<8; y++) { | |
538 | for (x=0; x<8; x++) { | |
539 | dst[x] = av_clip_uint8(( src[x-delta ] * weights[0] | |
540 | + src[x ] * weights[1] | |
541 | + src[x+delta ] * weights[2] | |
542 | + src[x+2*delta] * weights[3] + 64) >> 7); | |
543 | } | |
544 | src += stride; | |
545 | dst += stride; | |
546 | } | |
547 | } | |
548 | ||
549 | static void vp6_filter_diag2(VP56Context *s, uint8_t *dst, uint8_t *src, | |
550 | int stride, int h_weight, int v_weight) | |
551 | { | |
552 | uint8_t *tmp = s->edge_emu_buffer+16; | |
553 | s->h264chroma.put_h264_chroma_pixels_tab[0](tmp, src, stride, 9, h_weight, 0); | |
554 | s->h264chroma.put_h264_chroma_pixels_tab[0](dst, tmp, stride, 8, 0, v_weight); | |
555 | } | |
556 | ||
557 | static void vp6_filter(VP56Context *s, uint8_t *dst, uint8_t *src, | |
558 | int offset1, int offset2, int stride, | |
559 | VP56mv mv, int mask, int select, int luma) | |
560 | { | |
561 | int filter4 = 0; | |
562 | int x8 = mv.x & mask; | |
563 | int y8 = mv.y & mask; | |
564 | ||
565 | if (luma) { | |
566 | x8 *= 2; | |
567 | y8 *= 2; | |
568 | filter4 = s->filter_mode; | |
569 | if (filter4 == 2) { | |
570 | if (s->max_vector_length && | |
571 | (FFABS(mv.x) > s->max_vector_length || | |
572 | FFABS(mv.y) > s->max_vector_length)) { | |
573 | filter4 = 0; | |
574 | } else if (s->sample_variance_threshold | |
575 | && (vp6_block_variance(src+offset1, stride) | |
576 | < s->sample_variance_threshold)) { | |
577 | filter4 = 0; | |
578 | } | |
579 | } | |
580 | } | |
581 | ||
582 | if ((y8 && (offset2-offset1)*s->flip<0) || (!y8 && offset1 > offset2)) { | |
583 | offset1 = offset2; | |
584 | } | |
585 | ||
586 | if (filter4) { | |
587 | if (!y8) { /* left or right combine */ | |
588 | vp6_filter_hv4(dst, src+offset1, stride, 1, | |
589 | vp6_block_copy_filter[select][x8]); | |
590 | } else if (!x8) { /* above or below combine */ | |
591 | vp6_filter_hv4(dst, src+offset1, stride, stride, | |
592 | vp6_block_copy_filter[select][y8]); | |
593 | } else { | |
594 | s->vp56dsp.vp6_filter_diag4(dst, src+offset1+((mv.x^mv.y)>>31), stride, | |
595 | vp6_block_copy_filter[select][x8], | |
596 | vp6_block_copy_filter[select][y8]); | |
597 | } | |
598 | } else { | |
599 | if (!x8 || !y8) { | |
600 | s->h264chroma.put_h264_chroma_pixels_tab[0](dst, src + offset1, stride, 8, x8, y8); | |
601 | } else { | |
602 | vp6_filter_diag2(s, dst, src+offset1 + ((mv.x^mv.y)>>31), stride, x8, y8); | |
603 | } | |
604 | } | |
605 | } | |
606 | ||
607 | static av_cold void vp6_decode_init_context(VP56Context *s); | |
608 | ||
609 | static av_cold int vp6_decode_init(AVCodecContext *avctx) | |
610 | { | |
611 | VP56Context *s = avctx->priv_data; | |
612 | int ret; | |
613 | ||
614 | if ((ret = ff_vp56_init(avctx, avctx->codec->id == AV_CODEC_ID_VP6, | |
615 | avctx->codec->id == AV_CODEC_ID_VP6A)) < 0) | |
616 | return ret; | |
617 | ||
618 | vp6_decode_init_context(s); | |
619 | ||
620 | if (s->has_alpha) { | |
621 | s->alpha_context = av_mallocz(sizeof(VP56Context)); | |
622 | ff_vp56_init_context(avctx, s->alpha_context, | |
623 | s->flip == -1, s->has_alpha); | |
624 | vp6_decode_init_context(s->alpha_context); | |
625 | } | |
626 | ||
627 | return 0; | |
628 | } | |
629 | ||
630 | static av_cold void vp6_decode_init_context(VP56Context *s) | |
631 | { | |
632 | s->deblock_filtering = 0; | |
633 | s->vp56_coord_div = vp6_coord_div; | |
634 | s->parse_vector_adjustment = vp6_parse_vector_adjustment; | |
635 | s->filter = vp6_filter; | |
636 | s->default_models_init = vp6_default_models_init; | |
637 | s->parse_vector_models = vp6_parse_vector_models; | |
638 | s->parse_coeff_models = vp6_parse_coeff_models; | |
639 | s->parse_header = vp6_parse_header; | |
640 | } | |
641 | ||
642 | static av_cold void vp6_decode_free_context(VP56Context *s); | |
643 | ||
644 | static av_cold int vp6_decode_free(AVCodecContext *avctx) | |
645 | { | |
646 | VP56Context *s = avctx->priv_data; | |
647 | ||
648 | ff_vp56_free(avctx); | |
649 | vp6_decode_free_context(s); | |
650 | ||
651 | if (s->alpha_context) { | |
652 | ff_vp56_free_context(s->alpha_context); | |
653 | vp6_decode_free_context(s->alpha_context); | |
f6fa7814 | 654 | av_freep(&s->alpha_context); |
2ba45a60 DM |
655 | } |
656 | ||
657 | return 0; | |
658 | } | |
659 | ||
660 | static av_cold void vp6_decode_free_context(VP56Context *s) | |
661 | { | |
662 | int pt, ct, cg; | |
663 | ||
664 | for (pt=0; pt<2; pt++) { | |
665 | ff_free_vlc(&s->dccv_vlc[pt]); | |
666 | ff_free_vlc(&s->runv_vlc[pt]); | |
667 | for (ct=0; ct<3; ct++) | |
668 | for (cg=0; cg<6; cg++) | |
669 | ff_free_vlc(&s->ract_vlc[pt][ct][cg]); | |
670 | } | |
671 | } | |
672 | ||
673 | AVCodec ff_vp6_decoder = { | |
674 | .name = "vp6", | |
675 | .long_name = NULL_IF_CONFIG_SMALL("On2 VP6"), | |
676 | .type = AVMEDIA_TYPE_VIDEO, | |
677 | .id = AV_CODEC_ID_VP6, | |
678 | .priv_data_size = sizeof(VP56Context), | |
679 | .init = vp6_decode_init, | |
680 | .close = vp6_decode_free, | |
681 | .decode = ff_vp56_decode_frame, | |
682 | .capabilities = CODEC_CAP_DR1, | |
683 | }; | |
684 | ||
685 | /* flash version, not flipped upside-down */ | |
686 | AVCodec ff_vp6f_decoder = { | |
687 | .name = "vp6f", | |
688 | .long_name = NULL_IF_CONFIG_SMALL("On2 VP6 (Flash version)"), | |
689 | .type = AVMEDIA_TYPE_VIDEO, | |
690 | .id = AV_CODEC_ID_VP6F, | |
691 | .priv_data_size = sizeof(VP56Context), | |
692 | .init = vp6_decode_init, | |
693 | .close = vp6_decode_free, | |
694 | .decode = ff_vp56_decode_frame, | |
695 | .capabilities = CODEC_CAP_DR1, | |
696 | }; | |
697 | ||
698 | /* flash version, not flipped upside-down, with alpha channel */ | |
699 | AVCodec ff_vp6a_decoder = { | |
700 | .name = "vp6a", | |
701 | .long_name = NULL_IF_CONFIG_SMALL("On2 VP6 (Flash version, with alpha channel)"), | |
702 | .type = AVMEDIA_TYPE_VIDEO, | |
703 | .id = AV_CODEC_ID_VP6A, | |
704 | .priv_data_size = sizeof(VP56Context), | |
705 | .init = vp6_decode_init, | |
706 | .close = vp6_decode_free, | |
707 | .decode = ff_vp56_decode_frame, | |
708 | .capabilities = CODEC_CAP_DR1 | CODEC_CAP_SLICE_THREADS, | |
709 | }; |