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 * VP5 and VP6 compatible video decoder (common features)
24 */
25
26 #include "avcodec.h"
27 #include "bytestream.h"
28 #include "internal.h"
29 #include "h264chroma.h"
30 #include "vp56.h"
31 #include "vp56data.h"
32
33
ff_vp56_init_dequant(VP56Context * s,int quantizer)34 void ff_vp56_init_dequant(VP56Context *s, int quantizer)
35 {
36 if (s->quantizer != quantizer)
37 ff_vp3dsp_set_bounding_values(s->bounding_values_array, ff_vp56_filter_threshold[quantizer]);
38 s->quantizer = quantizer;
39 s->dequant_dc = ff_vp56_dc_dequant[quantizer] << 2;
40 s->dequant_ac = ff_vp56_ac_dequant[quantizer] << 2;
41 }
42
vp56_get_vectors_predictors(VP56Context * s,int row,int col,VP56Frame ref_frame)43 static int vp56_get_vectors_predictors(VP56Context *s, int row, int col,
44 VP56Frame ref_frame)
45 {
46 int nb_pred = 0;
47 VP56mv vect[2] = {{0,0}, {0,0}};
48 int pos, offset;
49 VP56mv mvp;
50
51 for (pos=0; pos<12; pos++) {
52 mvp.x = col + ff_vp56_candidate_predictor_pos[pos][0];
53 mvp.y = row + ff_vp56_candidate_predictor_pos[pos][1];
54 if (mvp.x < 0 || mvp.x >= s->mb_width ||
55 mvp.y < 0 || mvp.y >= s->mb_height)
56 continue;
57 offset = mvp.x + s->mb_width*mvp.y;
58
59 if (ff_vp56_reference_frame[s->macroblocks[offset].type] != ref_frame)
60 continue;
61 if ((s->macroblocks[offset].mv.x == vect[0].x &&
62 s->macroblocks[offset].mv.y == vect[0].y) ||
63 (s->macroblocks[offset].mv.x == 0 &&
64 s->macroblocks[offset].mv.y == 0))
65 continue;
66
67 vect[nb_pred++] = s->macroblocks[offset].mv;
68 if (nb_pred > 1) {
69 nb_pred = -1;
70 break;
71 }
72 s->vector_candidate_pos = pos;
73 }
74
75 s->vector_candidate[0] = vect[0];
76 s->vector_candidate[1] = vect[1];
77
78 return nb_pred+1;
79 }
80
vp56_parse_mb_type_models(VP56Context * s)81 static void vp56_parse_mb_type_models(VP56Context *s)
82 {
83 VP56RangeCoder *c = &s->c;
84 VP56Model *model = s->modelp;
85 int i, ctx, type;
86
87 for (ctx=0; ctx<3; ctx++) {
88 if (vp56_rac_get_prob_branchy(c, 174)) {
89 int idx = vp56_rac_gets(c, 4);
90 memcpy(model->mb_types_stats[ctx],
91 ff_vp56_pre_def_mb_type_stats[idx][ctx],
92 sizeof(model->mb_types_stats[ctx]));
93 }
94 if (vp56_rac_get_prob_branchy(c, 254)) {
95 for (type=0; type<10; type++) {
96 for(i=0; i<2; i++) {
97 if (vp56_rac_get_prob_branchy(c, 205)) {
98 int delta, sign = vp56_rac_get(c);
99
100 delta = vp56_rac_get_tree(c, ff_vp56_pmbtm_tree,
101 ff_vp56_mb_type_model_model);
102 if (!delta)
103 delta = 4 * vp56_rac_gets(c, 7);
104 model->mb_types_stats[ctx][type][i] += (delta ^ -sign) + sign;
105 }
106 }
107 }
108 }
109 }
110
111 /* compute MB type probability tables based on previous MB type */
112 for (ctx=0; ctx<3; ctx++) {
113 int p[10];
114
115 for (type=0; type<10; type++)
116 p[type] = 100 * model->mb_types_stats[ctx][type][1];
117
118 for (type=0; type<10; type++) {
119 int p02, p34, p0234, p17, p56, p89, p5689, p156789;
120
121 /* conservative MB type probability */
122 model->mb_type[ctx][type][0] = 255 - (255 * model->mb_types_stats[ctx][type][0]) / (1 + model->mb_types_stats[ctx][type][0] + model->mb_types_stats[ctx][type][1]);
123
124 p[type] = 0; /* same MB type => weight is null */
125
126 /* binary tree parsing probabilities */
127 p02 = p[0] + p[2];
128 p34 = p[3] + p[4];
129 p0234 = p02 + p34;
130 p17 = p[1] + p[7];
131 p56 = p[5] + p[6];
132 p89 = p[8] + p[9];
133 p5689 = p56 + p89;
134 p156789 = p17 + p5689;
135
136 model->mb_type[ctx][type][1] = 1 + 255 * p0234/(1+p0234+p156789);
137 model->mb_type[ctx][type][2] = 1 + 255 * p02 / (1+p0234);
138 model->mb_type[ctx][type][3] = 1 + 255 * p17 / (1+p156789);
139 model->mb_type[ctx][type][4] = 1 + 255 * p[0] / (1+p02);
140 model->mb_type[ctx][type][5] = 1 + 255 * p[3] / (1+p34);
141 model->mb_type[ctx][type][6] = 1 + 255 * p[1] / (1+p17);
142 model->mb_type[ctx][type][7] = 1 + 255 * p56 / (1+p5689);
143 model->mb_type[ctx][type][8] = 1 + 255 * p[5] / (1+p56);
144 model->mb_type[ctx][type][9] = 1 + 255 * p[8] / (1+p89);
145
146 /* restore initial value */
147 p[type] = 100 * model->mb_types_stats[ctx][type][1];
148 }
149 }
150 }
151
vp56_parse_mb_type(VP56Context * s,VP56mb prev_type,int ctx)152 static VP56mb vp56_parse_mb_type(VP56Context *s,
153 VP56mb prev_type, int ctx)
154 {
155 uint8_t *mb_type_model = s->modelp->mb_type[ctx][prev_type];
156 VP56RangeCoder *c = &s->c;
157
158 if (vp56_rac_get_prob_branchy(c, mb_type_model[0]))
159 return prev_type;
160 else
161 return vp56_rac_get_tree(c, ff_vp56_pmbt_tree, mb_type_model);
162 }
163
vp56_decode_4mv(VP56Context * s,int row,int col)164 static void vp56_decode_4mv(VP56Context *s, int row, int col)
165 {
166 VP56mv mv = {0,0};
167 int type[4];
168 int b;
169
170 /* parse each block type */
171 for (b=0; b<4; b++) {
172 type[b] = vp56_rac_gets(&s->c, 2);
173 if (type[b])
174 type[b]++; /* only returns 0, 2, 3 or 4 (all INTER_PF) */
175 }
176
177 /* get vectors */
178 for (b=0; b<4; b++) {
179 switch (type[b]) {
180 case VP56_MB_INTER_NOVEC_PF:
181 s->mv[b] = (VP56mv) {0,0};
182 break;
183 case VP56_MB_INTER_DELTA_PF:
184 s->parse_vector_adjustment(s, &s->mv[b]);
185 break;
186 case VP56_MB_INTER_V1_PF:
187 s->mv[b] = s->vector_candidate[0];
188 break;
189 case VP56_MB_INTER_V2_PF:
190 s->mv[b] = s->vector_candidate[1];
191 break;
192 }
193 mv.x += s->mv[b].x;
194 mv.y += s->mv[b].y;
195 }
196
197 /* this is the one selected for the whole MB for prediction */
198 s->macroblocks[row * s->mb_width + col].mv = s->mv[3];
199
200 /* chroma vectors are average luma vectors */
201 s->mv[4].x = s->mv[5].x = RSHIFT(mv.x,2);
202 s->mv[4].y = s->mv[5].y = RSHIFT(mv.y,2);
203 }
204
vp56_decode_mv(VP56Context * s,int row,int col)205 static VP56mb vp56_decode_mv(VP56Context *s, int row, int col)
206 {
207 VP56mv *mv, vect = {0,0};
208 int ctx, b;
209
210 ctx = vp56_get_vectors_predictors(s, row, col, VP56_FRAME_PREVIOUS);
211 s->mb_type = vp56_parse_mb_type(s, s->mb_type, ctx);
212 s->macroblocks[row * s->mb_width + col].type = s->mb_type;
213
214 switch (s->mb_type) {
215 case VP56_MB_INTER_V1_PF:
216 mv = &s->vector_candidate[0];
217 break;
218
219 case VP56_MB_INTER_V2_PF:
220 mv = &s->vector_candidate[1];
221 break;
222
223 case VP56_MB_INTER_V1_GF:
224 vp56_get_vectors_predictors(s, row, col, VP56_FRAME_GOLDEN);
225 mv = &s->vector_candidate[0];
226 break;
227
228 case VP56_MB_INTER_V2_GF:
229 vp56_get_vectors_predictors(s, row, col, VP56_FRAME_GOLDEN);
230 mv = &s->vector_candidate[1];
231 break;
232
233 case VP56_MB_INTER_DELTA_PF:
234 s->parse_vector_adjustment(s, &vect);
235 mv = &vect;
236 break;
237
238 case VP56_MB_INTER_DELTA_GF:
239 vp56_get_vectors_predictors(s, row, col, VP56_FRAME_GOLDEN);
240 s->parse_vector_adjustment(s, &vect);
241 mv = &vect;
242 break;
243
244 case VP56_MB_INTER_4V:
245 vp56_decode_4mv(s, row, col);
246 return s->mb_type;
247
248 default:
249 mv = &vect;
250 break;
251 }
252
253 s->macroblocks[row*s->mb_width + col].mv = *mv;
254
255 /* same vector for all blocks */
256 for (b=0; b<6; b++)
257 s->mv[b] = *mv;
258
259 return s->mb_type;
260 }
261
vp56_conceal_mv(VP56Context * s,int row,int col)262 static VP56mb vp56_conceal_mv(VP56Context *s, int row, int col)
263 {
264 VP56mv *mv, vect = {0,0};
265 int b;
266
267 s->mb_type = VP56_MB_INTER_NOVEC_PF;
268 s->macroblocks[row * s->mb_width + col].type = s->mb_type;
269
270 mv = &vect;
271
272 s->macroblocks[row*s->mb_width + col].mv = *mv;
273
274 /* same vector for all blocks */
275 for (b=0; b<6; b++)
276 s->mv[b] = *mv;
277
278 return s->mb_type;
279 }
280
vp56_add_predictors_dc(VP56Context * s,VP56Frame ref_frame)281 static void vp56_add_predictors_dc(VP56Context *s, VP56Frame ref_frame)
282 {
283 int idx = s->idct_scantable[0];
284 int b;
285
286 for (b=0; b<6; b++) {
287 VP56RefDc *ab = &s->above_blocks[s->above_block_idx[b]];
288 VP56RefDc *lb = &s->left_block[ff_vp56_b6to4[b]];
289 int count = 0;
290 int dc = 0;
291 int i;
292
293 if (ref_frame == lb->ref_frame) {
294 dc += lb->dc_coeff;
295 count++;
296 }
297 if (ref_frame == ab->ref_frame) {
298 dc += ab->dc_coeff;
299 count++;
300 }
301 if (s->avctx->codec->id == AV_CODEC_ID_VP5)
302 for (i=0; i<2; i++)
303 if (count < 2 && ref_frame == ab[-1+2*i].ref_frame) {
304 dc += ab[-1+2*i].dc_coeff;
305 count++;
306 }
307 if (count == 0)
308 dc = s->prev_dc[ff_vp56_b2p[b]][ref_frame];
309 else if (count == 2)
310 dc /= 2;
311
312 s->block_coeff[b][idx] += dc;
313 s->prev_dc[ff_vp56_b2p[b]][ref_frame] = s->block_coeff[b][idx];
314 ab->dc_coeff = s->block_coeff[b][idx];
315 ab->ref_frame = ref_frame;
316 lb->dc_coeff = s->block_coeff[b][idx];
317 lb->ref_frame = ref_frame;
318 s->block_coeff[b][idx] *= s->dequant_dc;
319 }
320 }
321
vp56_deblock_filter(VP56Context * s,uint8_t * yuv,ptrdiff_t stride,int dx,int dy)322 static void vp56_deblock_filter(VP56Context *s, uint8_t *yuv,
323 ptrdiff_t stride, int dx, int dy)
324 {
325 if (s->avctx->codec->id == AV_CODEC_ID_VP5) {
326 int t = ff_vp56_filter_threshold[s->quantizer];
327 if (dx) s->vp56dsp.edge_filter_hor(yuv + 10-dx , stride, t);
328 if (dy) s->vp56dsp.edge_filter_ver(yuv + stride*(10-dy), stride, t);
329 } else {
330 int * bounding_values = s->bounding_values_array + 127;
331 if (dx)
332 ff_vp3dsp_h_loop_filter_12(yuv + 10-dx, stride, bounding_values);
333 if (dy)
334 ff_vp3dsp_v_loop_filter_12(yuv + stride*(10-dy), stride, bounding_values);
335 }
336 }
337
vp56_mc(VP56Context * s,int b,int plane,uint8_t * src,ptrdiff_t stride,int x,int y)338 static void vp56_mc(VP56Context *s, int b, int plane, uint8_t *src,
339 ptrdiff_t stride, int x, int y)
340 {
341 uint8_t *dst = s->frames[VP56_FRAME_CURRENT]->data[plane] + s->block_offset[b];
342 uint8_t *src_block;
343 int src_offset;
344 int overlap_offset = 0;
345 int mask = s->vp56_coord_div[b] - 1;
346 int deblock_filtering = s->deblock_filtering;
347 int dx;
348 int dy;
349
350 if (s->avctx->skip_loop_filter >= AVDISCARD_ALL ||
351 (s->avctx->skip_loop_filter >= AVDISCARD_NONKEY
352 && !s->frames[VP56_FRAME_CURRENT]->key_frame))
353 deblock_filtering = 0;
354
355 dx = s->mv[b].x / s->vp56_coord_div[b];
356 dy = s->mv[b].y / s->vp56_coord_div[b];
357
358 if (b >= 4) {
359 x /= 2;
360 y /= 2;
361 }
362 x += dx - 2;
363 y += dy - 2;
364
365 if (x<0 || x+12>=s->plane_width[plane] ||
366 y<0 || y+12>=s->plane_height[plane]) {
367 s->vdsp.emulated_edge_mc(s->edge_emu_buffer,
368 src + s->block_offset[b] + (dy-2)*stride + (dx-2),
369 stride, stride,
370 12, 12, x, y,
371 s->plane_width[plane],
372 s->plane_height[plane]);
373 src_block = s->edge_emu_buffer;
374 src_offset = 2 + 2*stride;
375 } else if (deblock_filtering) {
376 /* only need a 12x12 block, but there is no such dsp function, */
377 /* so copy a 16x12 block */
378 s->hdsp.put_pixels_tab[0][0](s->edge_emu_buffer,
379 src + s->block_offset[b] + (dy-2)*stride + (dx-2),
380 stride, 12);
381 src_block = s->edge_emu_buffer;
382 src_offset = 2 + 2*stride;
383 } else {
384 src_block = src;
385 src_offset = s->block_offset[b] + dy*stride + dx;
386 }
387
388 if (deblock_filtering)
389 vp56_deblock_filter(s, src_block, stride, dx&7, dy&7);
390
391 if (s->mv[b].x & mask)
392 overlap_offset += (s->mv[b].x > 0) ? 1 : -1;
393 if (s->mv[b].y & mask)
394 overlap_offset += (s->mv[b].y > 0) ? stride : -stride;
395
396 if (overlap_offset) {
397 if (s->filter)
398 s->filter(s, dst, src_block, src_offset, src_offset+overlap_offset,
399 stride, s->mv[b], mask, s->filter_selection, b<4);
400 else
401 s->vp3dsp.put_no_rnd_pixels_l2(dst, src_block+src_offset,
402 src_block+src_offset+overlap_offset,
403 stride, 8);
404 } else {
405 s->hdsp.put_pixels_tab[1][0](dst, src_block+src_offset, stride, 8);
406 }
407 }
408
vp56_idct_put(VP56Context * s,uint8_t * dest,ptrdiff_t stride,int16_t * block,int selector)409 static void vp56_idct_put(VP56Context *s, uint8_t * dest, ptrdiff_t stride, int16_t *block, int selector)
410 {
411 if (selector > 10 || selector == 1)
412 s->vp3dsp.idct_put(dest, stride, block);
413 else
414 ff_vp3dsp_idct10_put(dest, stride, block);
415 }
416
vp56_idct_add(VP56Context * s,uint8_t * dest,ptrdiff_t stride,int16_t * block,int selector)417 static void vp56_idct_add(VP56Context *s, uint8_t * dest, ptrdiff_t stride, int16_t *block, int selector)
418 {
419 if (selector > 10)
420 s->vp3dsp.idct_add(dest, stride, block);
421 else if (selector > 1)
422 ff_vp3dsp_idct10_add(dest, stride, block);
423 else
424 s->vp3dsp.idct_dc_add(dest, stride, block);
425 }
426
vp56_render_mb(VP56Context * s,int row,int col,int is_alpha,VP56mb mb_type)427 static av_always_inline void vp56_render_mb(VP56Context *s, int row, int col, int is_alpha, VP56mb mb_type)
428 {
429 int b, ab, b_max, plane, off;
430 AVFrame *frame_current, *frame_ref;
431 VP56Frame ref_frame = ff_vp56_reference_frame[mb_type];
432
433 vp56_add_predictors_dc(s, ref_frame);
434
435 frame_current = s->frames[VP56_FRAME_CURRENT];
436 frame_ref = s->frames[ref_frame];
437 if (mb_type != VP56_MB_INTRA && !frame_ref->data[0])
438 return;
439
440 ab = 6*is_alpha;
441 b_max = 6 - 2*is_alpha;
442
443 switch (mb_type) {
444 case VP56_MB_INTRA:
445 for (b=0; b<b_max; b++) {
446 plane = ff_vp56_b2p[b+ab];
447 vp56_idct_put(s, frame_current->data[plane] + s->block_offset[b],
448 s->stride[plane], s->block_coeff[b], s->idct_selector[b]);
449 }
450 break;
451
452 case VP56_MB_INTER_NOVEC_PF:
453 case VP56_MB_INTER_NOVEC_GF:
454 for (b=0; b<b_max; b++) {
455 plane = ff_vp56_b2p[b+ab];
456 off = s->block_offset[b];
457 s->hdsp.put_pixels_tab[1][0](frame_current->data[plane] + off,
458 frame_ref->data[plane] + off,
459 s->stride[plane], 8);
460 vp56_idct_add(s, frame_current->data[plane] + off,
461 s->stride[plane], s->block_coeff[b], s->idct_selector[b]);
462 }
463 break;
464
465 case VP56_MB_INTER_DELTA_PF:
466 case VP56_MB_INTER_V1_PF:
467 case VP56_MB_INTER_V2_PF:
468 case VP56_MB_INTER_DELTA_GF:
469 case VP56_MB_INTER_4V:
470 case VP56_MB_INTER_V1_GF:
471 case VP56_MB_INTER_V2_GF:
472 for (b=0; b<b_max; b++) {
473 int x_off = b==1 || b==3 ? 8 : 0;
474 int y_off = b==2 || b==3 ? 8 : 0;
475 plane = ff_vp56_b2p[b+ab];
476 vp56_mc(s, b, plane, frame_ref->data[plane], s->stride[plane],
477 16*col+x_off, 16*row+y_off);
478 vp56_idct_add(s, frame_current->data[plane] + s->block_offset[b],
479 s->stride[plane], s->block_coeff[b], s->idct_selector[b]);
480 }
481 break;
482 }
483
484 if (is_alpha) {
485 s->block_coeff[4][0] = 0;
486 s->block_coeff[5][0] = 0;
487 }
488 }
489
vp56_decode_mb(VP56Context * s,int row,int col,int is_alpha)490 static int vp56_decode_mb(VP56Context *s, int row, int col, int is_alpha)
491 {
492 VP56mb mb_type;
493 int ret;
494
495 if (s->frames[VP56_FRAME_CURRENT]->key_frame)
496 mb_type = VP56_MB_INTRA;
497 else
498 mb_type = vp56_decode_mv(s, row, col);
499
500 ret = s->parse_coeff(s);
501 if (ret < 0)
502 return ret;
503
504 vp56_render_mb(s, row, col, is_alpha, mb_type);
505
506 return 0;
507 }
508
vp56_conceal_mb(VP56Context * s,int row,int col,int is_alpha)509 static int vp56_conceal_mb(VP56Context *s, int row, int col, int is_alpha)
510 {
511 VP56mb mb_type;
512
513 if (s->frames[VP56_FRAME_CURRENT]->key_frame)
514 mb_type = VP56_MB_INTRA;
515 else
516 mb_type = vp56_conceal_mv(s, row, col);
517
518 vp56_render_mb(s, row, col, is_alpha, mb_type);
519
520 return 0;
521 }
522
vp56_size_changed(VP56Context * s)523 static int vp56_size_changed(VP56Context *s)
524 {
525 AVCodecContext *avctx = s->avctx;
526 int stride = s->frames[VP56_FRAME_CURRENT]->linesize[0];
527 int i;
528
529 s->plane_width[0] = s->plane_width[3] = avctx->coded_width;
530 s->plane_width[1] = s->plane_width[2] = avctx->coded_width/2;
531 s->plane_height[0] = s->plane_height[3] = avctx->coded_height;
532 s->plane_height[1] = s->plane_height[2] = avctx->coded_height/2;
533
534 s->have_undamaged_frame = 0;
535
536 for (i=0; i<4; i++)
537 s->stride[i] = s->flip * s->frames[VP56_FRAME_CURRENT]->linesize[i];
538
539 s->mb_width = (avctx->coded_width +15) / 16;
540 s->mb_height = (avctx->coded_height+15) / 16;
541
542 if (s->mb_width > 1000 || s->mb_height > 1000) {
543 ff_set_dimensions(avctx, 0, 0);
544 av_log(avctx, AV_LOG_ERROR, "picture too big\n");
545 return AVERROR_INVALIDDATA;
546 }
547
548 av_reallocp_array(&s->above_blocks, 4*s->mb_width+6,
549 sizeof(*s->above_blocks));
550 av_reallocp_array(&s->macroblocks, s->mb_width*s->mb_height,
551 sizeof(*s->macroblocks));
552 av_free(s->edge_emu_buffer_alloc);
553 s->edge_emu_buffer_alloc = av_malloc(16*stride);
554 s->edge_emu_buffer = s->edge_emu_buffer_alloc;
555 if (!s->above_blocks || !s->macroblocks || !s->edge_emu_buffer_alloc)
556 return AVERROR(ENOMEM);
557 if (s->flip < 0)
558 s->edge_emu_buffer += 15 * stride;
559
560 if (s->alpha_context)
561 return vp56_size_changed(s->alpha_context);
562
563 return 0;
564 }
565
566 static int ff_vp56_decode_mbs(AVCodecContext *avctx, void *, int, int);
567
ff_vp56_decode_frame(AVCodecContext * avctx,void * data,int * got_frame,AVPacket * avpkt)568 int ff_vp56_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
569 AVPacket *avpkt)
570 {
571 const uint8_t *buf = avpkt->data;
572 VP56Context *s = avctx->priv_data;
573 AVFrame *const p = s->frames[VP56_FRAME_CURRENT];
574 int remaining_buf_size = avpkt->size;
575 int alpha_offset = remaining_buf_size;
576 int i, res;
577 int ret;
578
579 if (s->has_alpha) {
580 if (remaining_buf_size < 3)
581 return AVERROR_INVALIDDATA;
582 alpha_offset = bytestream_get_be24(&buf);
583 remaining_buf_size -= 3;
584 if (remaining_buf_size < alpha_offset)
585 return AVERROR_INVALIDDATA;
586 }
587
588 res = s->parse_header(s, buf, alpha_offset);
589 if (res < 0)
590 return res;
591
592 if (res == VP56_SIZE_CHANGE) {
593 for (i = 0; i < 4; i++) {
594 av_frame_unref(s->frames[i]);
595 if (s->alpha_context)
596 av_frame_unref(s->alpha_context->frames[i]);
597 }
598 }
599
600 ret = ff_get_buffer(avctx, p, AV_GET_BUFFER_FLAG_REF);
601 if (ret < 0) {
602 if (res == VP56_SIZE_CHANGE)
603 ff_set_dimensions(avctx, 0, 0);
604 return ret;
605 }
606
607 if (avctx->pix_fmt == AV_PIX_FMT_YUVA420P) {
608 av_frame_unref(s->alpha_context->frames[VP56_FRAME_CURRENT]);
609 if ((ret = av_frame_ref(s->alpha_context->frames[VP56_FRAME_CURRENT], p)) < 0) {
610 av_frame_unref(p);
611 if (res == VP56_SIZE_CHANGE)
612 ff_set_dimensions(avctx, 0, 0);
613 return ret;
614 }
615 }
616
617 if (res == VP56_SIZE_CHANGE) {
618 if (vp56_size_changed(s)) {
619 av_frame_unref(p);
620 return AVERROR_INVALIDDATA;
621 }
622 }
623
624 if (avctx->pix_fmt == AV_PIX_FMT_YUVA420P) {
625 int bak_w = avctx->width;
626 int bak_h = avctx->height;
627 int bak_cw = avctx->coded_width;
628 int bak_ch = avctx->coded_height;
629 buf += alpha_offset;
630 remaining_buf_size -= alpha_offset;
631
632 res = s->alpha_context->parse_header(s->alpha_context, buf, remaining_buf_size);
633 if (res != 0) {
634 if(res==VP56_SIZE_CHANGE) {
635 av_log(avctx, AV_LOG_ERROR, "Alpha reconfiguration\n");
636 avctx->width = bak_w;
637 avctx->height = bak_h;
638 avctx->coded_width = bak_cw;
639 avctx->coded_height = bak_ch;
640 }
641 av_frame_unref(p);
642 return AVERROR_INVALIDDATA;
643 }
644 }
645
646 s->discard_frame = 0;
647 avctx->execute2(avctx, ff_vp56_decode_mbs, 0, 0, (avctx->pix_fmt == AV_PIX_FMT_YUVA420P) + 1);
648
649 if (s->discard_frame)
650 return AVERROR_INVALIDDATA;
651
652 if ((res = av_frame_ref(data, p)) < 0)
653 return res;
654 *got_frame = 1;
655
656 return avpkt->size;
657 }
658
ff_vp56_decode_mbs(AVCodecContext * avctx,void * data,int jobnr,int threadnr)659 static int ff_vp56_decode_mbs(AVCodecContext *avctx, void *data,
660 int jobnr, int threadnr)
661 {
662 VP56Context *s0 = avctx->priv_data;
663 int is_alpha = (jobnr == 1);
664 VP56Context *s = is_alpha ? s0->alpha_context : s0;
665 AVFrame *const p = s->frames[VP56_FRAME_CURRENT];
666 int mb_row, mb_col, mb_row_flip, mb_offset = 0;
667 int block, y, uv;
668 ptrdiff_t stride_y, stride_uv;
669 int res;
670 int damaged = 0;
671
672 if (p->key_frame) {
673 p->pict_type = AV_PICTURE_TYPE_I;
674 s->default_models_init(s);
675 for (block=0; block<s->mb_height*s->mb_width; block++)
676 s->macroblocks[block].type = VP56_MB_INTRA;
677 } else {
678 p->pict_type = AV_PICTURE_TYPE_P;
679 vp56_parse_mb_type_models(s);
680 s->parse_vector_models(s);
681 s->mb_type = VP56_MB_INTER_NOVEC_PF;
682 }
683
684 if (s->parse_coeff_models(s))
685 goto next;
686
687 memset(s->prev_dc, 0, sizeof(s->prev_dc));
688 s->prev_dc[1][VP56_FRAME_CURRENT] = 128;
689 s->prev_dc[2][VP56_FRAME_CURRENT] = 128;
690
691 for (block=0; block < 4*s->mb_width+6; block++) {
692 s->above_blocks[block].ref_frame = VP56_FRAME_NONE;
693 s->above_blocks[block].dc_coeff = 0;
694 s->above_blocks[block].not_null_dc = 0;
695 }
696 s->above_blocks[2*s->mb_width + 2].ref_frame = VP56_FRAME_CURRENT;
697 s->above_blocks[3*s->mb_width + 4].ref_frame = VP56_FRAME_CURRENT;
698
699 stride_y = p->linesize[0];
700 stride_uv = p->linesize[1];
701
702 if (s->flip < 0)
703 mb_offset = 7;
704
705 /* main macroblocks loop */
706 for (mb_row=0; mb_row<s->mb_height; mb_row++) {
707 if (s->flip < 0)
708 mb_row_flip = s->mb_height - mb_row - 1;
709 else
710 mb_row_flip = mb_row;
711
712 for (block=0; block<4; block++) {
713 s->left_block[block].ref_frame = VP56_FRAME_NONE;
714 s->left_block[block].dc_coeff = 0;
715 s->left_block[block].not_null_dc = 0;
716 }
717 memset(s->coeff_ctx, 0, sizeof(s->coeff_ctx));
718 memset(s->coeff_ctx_last, 24, sizeof(s->coeff_ctx_last));
719
720 s->above_block_idx[0] = 1;
721 s->above_block_idx[1] = 2;
722 s->above_block_idx[2] = 1;
723 s->above_block_idx[3] = 2;
724 s->above_block_idx[4] = 2*s->mb_width + 2 + 1;
725 s->above_block_idx[5] = 3*s->mb_width + 4 + 1;
726
727 s->block_offset[s->frbi] = (mb_row_flip*16 + mb_offset) * stride_y;
728 s->block_offset[s->srbi] = s->block_offset[s->frbi] + 8*stride_y;
729 s->block_offset[1] = s->block_offset[0] + 8;
730 s->block_offset[3] = s->block_offset[2] + 8;
731 s->block_offset[4] = (mb_row_flip*8 + mb_offset) * stride_uv;
732 s->block_offset[5] = s->block_offset[4];
733
734 for (mb_col=0; mb_col<s->mb_width; mb_col++) {
735 if (!damaged) {
736 int ret = vp56_decode_mb(s, mb_row, mb_col, is_alpha);
737 if (ret < 0) {
738 damaged = 1;
739 if (!s->have_undamaged_frame || !avctx->error_concealment) {
740 s->discard_frame = 1;
741 return AVERROR_INVALIDDATA;
742 }
743 }
744 }
745 if (damaged)
746 vp56_conceal_mb(s, mb_row, mb_col, is_alpha);
747
748 for (y=0; y<4; y++) {
749 s->above_block_idx[y] += 2;
750 s->block_offset[y] += 16;
751 }
752
753 for (uv=4; uv<6; uv++) {
754 s->above_block_idx[uv] += 1;
755 s->block_offset[uv] += 8;
756 }
757 }
758 }
759
760 if (!damaged)
761 s->have_undamaged_frame = 1;
762
763 next:
764 if (p->key_frame || s->golden_frame) {
765 av_frame_unref(s->frames[VP56_FRAME_GOLDEN]);
766 if ((res = av_frame_ref(s->frames[VP56_FRAME_GOLDEN], p)) < 0)
767 return res;
768 }
769
770 av_frame_unref(s->frames[VP56_FRAME_PREVIOUS]);
771 FFSWAP(AVFrame *, s->frames[VP56_FRAME_CURRENT],
772 s->frames[VP56_FRAME_PREVIOUS]);
773 return 0;
774 }
775
ff_vp56_init(AVCodecContext * avctx,int flip,int has_alpha)776 av_cold int ff_vp56_init(AVCodecContext *avctx, int flip, int has_alpha)
777 {
778 VP56Context *s = avctx->priv_data;
779 return ff_vp56_init_context(avctx, s, flip, has_alpha);
780 }
781
ff_vp56_init_context(AVCodecContext * avctx,VP56Context * s,int flip,int has_alpha)782 av_cold int ff_vp56_init_context(AVCodecContext *avctx, VP56Context *s,
783 int flip, int has_alpha)
784 {
785 int i;
786
787 s->avctx = avctx;
788 avctx->pix_fmt = has_alpha ? AV_PIX_FMT_YUVA420P : AV_PIX_FMT_YUV420P;
789 if (avctx->skip_alpha) avctx->pix_fmt = AV_PIX_FMT_YUV420P;
790
791 ff_h264chroma_init(&s->h264chroma, 8);
792 ff_hpeldsp_init(&s->hdsp, avctx->flags);
793 ff_videodsp_init(&s->vdsp, 8);
794 ff_vp3dsp_init(&s->vp3dsp, avctx->flags);
795 for (i = 0; i < 64; i++) {
796 #define TRANSPOSE(x) (((x) >> 3) | (((x) & 7) << 3))
797 s->idct_scantable[i] = TRANSPOSE(ff_zigzag_direct[i]);
798 #undef TRANSPOSE
799 }
800
801 for (i = 0; i < FF_ARRAY_ELEMS(s->frames); i++) {
802 s->frames[i] = av_frame_alloc();
803 if (!s->frames[i]) {
804 ff_vp56_free(avctx);
805 return AVERROR(ENOMEM);
806 }
807 }
808 s->edge_emu_buffer_alloc = NULL;
809
810 s->above_blocks = NULL;
811 s->macroblocks = NULL;
812 s->quantizer = -1;
813 s->deblock_filtering = 1;
814 s->golden_frame = 0;
815
816 s->filter = NULL;
817
818 s->has_alpha = has_alpha;
819
820 s->modelp = &s->model;
821
822 if (flip) {
823 s->flip = -1;
824 s->frbi = 2;
825 s->srbi = 0;
826 } else {
827 s->flip = 1;
828 s->frbi = 0;
829 s->srbi = 2;
830 }
831
832 return 0;
833 }
834
ff_vp56_free(AVCodecContext * avctx)835 av_cold int ff_vp56_free(AVCodecContext *avctx)
836 {
837 VP56Context *s = avctx->priv_data;
838 return ff_vp56_free_context(s);
839 }
840
ff_vp56_free_context(VP56Context * s)841 av_cold int ff_vp56_free_context(VP56Context *s)
842 {
843 int i;
844
845 av_freep(&s->above_blocks);
846 av_freep(&s->macroblocks);
847 av_freep(&s->edge_emu_buffer_alloc);
848
849 for (i = 0; i < FF_ARRAY_ELEMS(s->frames); i++)
850 av_frame_free(&s->frames[i]);
851
852 return 0;
853 }
854