c9490e770b687f940981f0f376782fa428f337b2
[libav.git] / libavcodec / vp56.c
1 /*
2 * Copyright (C) 2006 Aurelien Jacobs <aurel@gnuage.org>
3 *
4 * This file is part of Libav.
5 *
6 * Libav 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 * Libav 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 Libav; 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
30 #include "vp56.h"
31 #include "vp56data.h"
32
33
34 void ff_vp56_init_dequant(VP56Context *s, int quantizer)
35 {
36 s->quantizer = quantizer;
37 s->dequant_dc = vp56_dc_dequant[quantizer] << 2;
38 s->dequant_ac = vp56_ac_dequant[quantizer] << 2;
39 memset(s->qscale_table, quantizer, s->mb_width);
40 }
41
42 static int vp56_get_vectors_predictors(VP56Context *s, int row, int col,
43 VP56Frame ref_frame)
44 {
45 int nb_pred = 0;
46 VP56mv vect[2] = {{0,0}, {0,0}};
47 int pos, offset;
48 VP56mv mvp;
49
50 for (pos=0; pos<12; pos++) {
51 mvp.x = col + vp56_candidate_predictor_pos[pos][0];
52 mvp.y = row + vp56_candidate_predictor_pos[pos][1];
53 if (mvp.x < 0 || mvp.x >= s->mb_width ||
54 mvp.y < 0 || mvp.y >= s->mb_height)
55 continue;
56 offset = mvp.x + s->mb_width*mvp.y;
57
58 if (vp56_reference_frame[s->macroblocks[offset].type] != ref_frame)
59 continue;
60 if ((s->macroblocks[offset].mv.x == vect[0].x &&
61 s->macroblocks[offset].mv.y == vect[0].y) ||
62 (s->macroblocks[offset].mv.x == 0 &&
63 s->macroblocks[offset].mv.y == 0))
64 continue;
65
66 vect[nb_pred++] = s->macroblocks[offset].mv;
67 if (nb_pred > 1) {
68 nb_pred = -1;
69 break;
70 }
71 s->vector_candidate_pos = pos;
72 }
73
74 s->vector_candidate[0] = vect[0];
75 s->vector_candidate[1] = vect[1];
76
77 return nb_pred+1;
78 }
79
80 static void vp56_parse_mb_type_models(VP56Context *s)
81 {
82 VP56RangeCoder *c = &s->c;
83 VP56Model *model = s->modelp;
84 int i, ctx, type;
85
86 for (ctx=0; ctx<3; ctx++) {
87 if (vp56_rac_get_prob(c, 174)) {
88 int idx = vp56_rac_gets(c, 4);
89 memcpy(model->mb_types_stats[ctx],
90 vp56_pre_def_mb_type_stats[idx][ctx],
91 sizeof(model->mb_types_stats[ctx]));
92 }
93 if (vp56_rac_get_prob(c, 254)) {
94 for (type=0; type<10; type++) {
95 for(i=0; i<2; i++) {
96 if (vp56_rac_get_prob(c, 205)) {
97 int delta, sign = vp56_rac_get(c);
98
99 delta = vp56_rac_get_tree(c, vp56_pmbtm_tree,
100 vp56_mb_type_model_model);
101 if (!delta)
102 delta = 4 * vp56_rac_gets(c, 7);
103 model->mb_types_stats[ctx][type][i] += (delta ^ -sign) + sign;
104 }
105 }
106 }
107 }
108 }
109
110 /* compute MB type probability tables based on previous MB type */
111 for (ctx=0; ctx<3; ctx++) {
112 int p[10];
113
114 for (type=0; type<10; type++)
115 p[type] = 100 * model->mb_types_stats[ctx][type][1];
116
117 for (type=0; type<10; type++) {
118 int p02, p34, p0234, p17, p56, p89, p5689, p156789;
119
120 /* conservative MB type probability */
121 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]);
122
123 p[type] = 0; /* same MB type => weight is null */
124
125 /* binary tree parsing probabilities */
126 p02 = p[0] + p[2];
127 p34 = p[3] + p[4];
128 p0234 = p02 + p34;
129 p17 = p[1] + p[7];
130 p56 = p[5] + p[6];
131 p89 = p[8] + p[9];
132 p5689 = p56 + p89;
133 p156789 = p17 + p5689;
134
135 model->mb_type[ctx][type][1] = 1 + 255 * p0234/(1+p0234+p156789);
136 model->mb_type[ctx][type][2] = 1 + 255 * p02 / (1+p0234);
137 model->mb_type[ctx][type][3] = 1 + 255 * p17 / (1+p156789);
138 model->mb_type[ctx][type][4] = 1 + 255 * p[0] / (1+p02);
139 model->mb_type[ctx][type][5] = 1 + 255 * p[3] / (1+p34);
140 model->mb_type[ctx][type][6] = 1 + 255 * p[1] / (1+p17);
141 model->mb_type[ctx][type][7] = 1 + 255 * p56 / (1+p5689);
142 model->mb_type[ctx][type][8] = 1 + 255 * p[5] / (1+p56);
143 model->mb_type[ctx][type][9] = 1 + 255 * p[8] / (1+p89);
144
145 /* restore initial value */
146 p[type] = 100 * model->mb_types_stats[ctx][type][1];
147 }
148 }
149 }
150
151 static VP56mb vp56_parse_mb_type(VP56Context *s,
152 VP56mb prev_type, int ctx)
153 {
154 uint8_t *mb_type_model = s->modelp->mb_type[ctx][prev_type];
155 VP56RangeCoder *c = &s->c;
156
157 if (vp56_rac_get_prob(c, mb_type_model[0]))
158 return prev_type;
159 else
160 return vp56_rac_get_tree(c, vp56_pmbt_tree, mb_type_model);
161 }
162
163 static void vp56_decode_4mv(VP56Context *s, int row, int col)
164 {
165 VP56mv mv = {0,0};
166 int type[4];
167 int b;
168
169 /* parse each block type */
170 for (b=0; b<4; b++) {
171 type[b] = vp56_rac_gets(&s->c, 2);
172 if (type[b])
173 type[b]++; /* only returns 0, 2, 3 or 4 (all INTER_PF) */
174 }
175
176 /* get vectors */
177 for (b=0; b<4; b++) {
178 switch (type[b]) {
179 case VP56_MB_INTER_NOVEC_PF:
180 s->mv[b] = (VP56mv) {0,0};
181 break;
182 case VP56_MB_INTER_DELTA_PF:
183 s->parse_vector_adjustment(s, &s->mv[b]);
184 break;
185 case VP56_MB_INTER_V1_PF:
186 s->mv[b] = s->vector_candidate[0];
187 break;
188 case VP56_MB_INTER_V2_PF:
189 s->mv[b] = s->vector_candidate[1];
190 break;
191 }
192 mv.x += s->mv[b].x;
193 mv.y += s->mv[b].y;
194 }
195
196 /* this is the one selected for the whole MB for prediction */
197 s->macroblocks[row * s->mb_width + col].mv = s->mv[3];
198
199 /* chroma vectors are average luma vectors */
200 if (s->avctx->codec->id == AV_CODEC_ID_VP5) {
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 } else {
204 s->mv[4] = s->mv[5] = (VP56mv) {mv.x/4, mv.y/4};
205 }
206 }
207
208 static VP56mb vp56_decode_mv(VP56Context *s, int row, int col)
209 {
210 VP56mv *mv, vect = {0,0};
211 int ctx, b;
212
213 ctx = vp56_get_vectors_predictors(s, row, col, VP56_FRAME_PREVIOUS);
214 s->mb_type = vp56_parse_mb_type(s, s->mb_type, ctx);
215 s->macroblocks[row * s->mb_width + col].type = s->mb_type;
216
217 switch (s->mb_type) {
218 case VP56_MB_INTER_V1_PF:
219 mv = &s->vector_candidate[0];
220 break;
221
222 case VP56_MB_INTER_V2_PF:
223 mv = &s->vector_candidate[1];
224 break;
225
226 case VP56_MB_INTER_V1_GF:
227 vp56_get_vectors_predictors(s, row, col, VP56_FRAME_GOLDEN);
228 mv = &s->vector_candidate[0];
229 break;
230
231 case VP56_MB_INTER_V2_GF:
232 vp56_get_vectors_predictors(s, row, col, VP56_FRAME_GOLDEN);
233 mv = &s->vector_candidate[1];
234 break;
235
236 case VP56_MB_INTER_DELTA_PF:
237 s->parse_vector_adjustment(s, &vect);
238 mv = &vect;
239 break;
240
241 case VP56_MB_INTER_DELTA_GF:
242 vp56_get_vectors_predictors(s, row, col, VP56_FRAME_GOLDEN);
243 s->parse_vector_adjustment(s, &vect);
244 mv = &vect;
245 break;
246
247 case VP56_MB_INTER_4V:
248 vp56_decode_4mv(s, row, col);
249 return s->mb_type;
250
251 default:
252 mv = &vect;
253 break;
254 }
255
256 s->macroblocks[row*s->mb_width + col].mv = *mv;
257
258 /* same vector for all blocks */
259 for (b=0; b<6; b++)
260 s->mv[b] = *mv;
261
262 return s->mb_type;
263 }
264
265 static void vp56_add_predictors_dc(VP56Context *s, VP56Frame ref_frame)
266 {
267 int idx = s->scantable.permutated[0];
268 int b;
269
270 for (b=0; b<6; b++) {
271 VP56RefDc *ab = &s->above_blocks[s->above_block_idx[b]];
272 VP56RefDc *lb = &s->left_block[ff_vp56_b6to4[b]];
273 int count = 0;
274 int dc = 0;
275 int i;
276
277 if (ref_frame == lb->ref_frame) {
278 dc += lb->dc_coeff;
279 count++;
280 }
281 if (ref_frame == ab->ref_frame) {
282 dc += ab->dc_coeff;
283 count++;
284 }
285 if (s->avctx->codec->id == AV_CODEC_ID_VP5)
286 for (i=0; i<2; i++)
287 if (count < 2 && ref_frame == ab[-1+2*i].ref_frame) {
288 dc += ab[-1+2*i].dc_coeff;
289 count++;
290 }
291 if (count == 0)
292 dc = s->prev_dc[ff_vp56_b2p[b]][ref_frame];
293 else if (count == 2)
294 dc /= 2;
295
296 s->block_coeff[b][idx] += dc;
297 s->prev_dc[ff_vp56_b2p[b]][ref_frame] = s->block_coeff[b][idx];
298 ab->dc_coeff = s->block_coeff[b][idx];
299 ab->ref_frame = ref_frame;
300 lb->dc_coeff = s->block_coeff[b][idx];
301 lb->ref_frame = ref_frame;
302 s->block_coeff[b][idx] *= s->dequant_dc;
303 }
304 }
305
306 static void vp56_deblock_filter(VP56Context *s, uint8_t *yuv,
307 int stride, int dx, int dy)
308 {
309 int t = vp56_filter_threshold[s->quantizer];
310 if (dx) s->vp56dsp.edge_filter_hor(yuv + 10-dx , stride, t);
311 if (dy) s->vp56dsp.edge_filter_ver(yuv + stride*(10-dy), stride, t);
312 }
313
314 static void vp56_mc(VP56Context *s, int b, int plane, uint8_t *src,
315 int stride, int x, int y)
316 {
317 uint8_t *dst=s->framep[VP56_FRAME_CURRENT]->data[plane]+s->block_offset[b];
318 uint8_t *src_block;
319 int src_offset;
320 int overlap_offset = 0;
321 int mask = s->vp56_coord_div[b] - 1;
322 int deblock_filtering = s->deblock_filtering;
323 int dx;
324 int dy;
325
326 if (s->avctx->skip_loop_filter >= AVDISCARD_ALL ||
327 (s->avctx->skip_loop_filter >= AVDISCARD_NONKEY
328 && !s->framep[VP56_FRAME_CURRENT]->key_frame))
329 deblock_filtering = 0;
330
331 dx = s->mv[b].x / s->vp56_coord_div[b];
332 dy = s->mv[b].y / s->vp56_coord_div[b];
333
334 if (b >= 4) {
335 x /= 2;
336 y /= 2;
337 }
338 x += dx - 2;
339 y += dy - 2;
340
341 if (x<0 || x+12>=s->plane_width[plane] ||
342 y<0 || y+12>=s->plane_height[plane]) {
343 s->dsp.emulated_edge_mc(s->edge_emu_buffer,
344 src + s->block_offset[b] + (dy-2)*stride + (dx-2),
345 stride, 12, 12, x, y,
346 s->plane_width[plane],
347 s->plane_height[plane]);
348 src_block = s->edge_emu_buffer;
349 src_offset = 2 + 2*stride;
350 } else if (deblock_filtering) {
351 /* only need a 12x12 block, but there is no such dsp function, */
352 /* so copy a 16x12 block */
353 s->dsp.put_pixels_tab[0][0](s->edge_emu_buffer,
354 src + s->block_offset[b] + (dy-2)*stride + (dx-2),
355 stride, 12);
356 src_block = s->edge_emu_buffer;
357 src_offset = 2 + 2*stride;
358 } else {
359 src_block = src;
360 src_offset = s->block_offset[b] + dy*stride + dx;
361 }
362
363 if (deblock_filtering)
364 vp56_deblock_filter(s, src_block, stride, dx&7, dy&7);
365
366 if (s->mv[b].x & mask)
367 overlap_offset += (s->mv[b].x > 0) ? 1 : -1;
368 if (s->mv[b].y & mask)
369 overlap_offset += (s->mv[b].y > 0) ? stride : -stride;
370
371 if (overlap_offset) {
372 if (s->filter)
373 s->filter(s, dst, src_block, src_offset, src_offset+overlap_offset,
374 stride, s->mv[b], mask, s->filter_selection, b<4);
375 else
376 s->dsp.put_no_rnd_pixels_l2[1](dst, src_block+src_offset,
377 src_block+src_offset+overlap_offset,
378 stride, 8);
379 } else {
380 s->dsp.put_pixels_tab[1][0](dst, src_block+src_offset, stride, 8);
381 }
382 }
383
384 static void vp56_decode_mb(VP56Context *s, int row, int col, int is_alpha)
385 {
386 AVFrame *frame_current, *frame_ref;
387 VP56mb mb_type;
388 VP56Frame ref_frame;
389 int b, ab, b_max, plane, off;
390
391 if (s->framep[VP56_FRAME_CURRENT]->key_frame)
392 mb_type = VP56_MB_INTRA;
393 else
394 mb_type = vp56_decode_mv(s, row, col);
395 ref_frame = vp56_reference_frame[mb_type];
396
397 s->dsp.clear_blocks(*s->block_coeff);
398
399 s->parse_coeff(s);
400
401 vp56_add_predictors_dc(s, ref_frame);
402
403 frame_current = s->framep[VP56_FRAME_CURRENT];
404 frame_ref = s->framep[ref_frame];
405 if (mb_type != VP56_MB_INTRA && !frame_ref->data[0])
406 return;
407
408 ab = 6*is_alpha;
409 b_max = 6 - 2*is_alpha;
410
411 switch (mb_type) {
412 case VP56_MB_INTRA:
413 for (b=0; b<b_max; b++) {
414 plane = ff_vp56_b2p[b+ab];
415 s->vp3dsp.idct_put(frame_current->data[plane] + s->block_offset[b],
416 s->stride[plane], s->block_coeff[b]);
417 }
418 break;
419
420 case VP56_MB_INTER_NOVEC_PF:
421 case VP56_MB_INTER_NOVEC_GF:
422 for (b=0; b<b_max; b++) {
423 plane = ff_vp56_b2p[b+ab];
424 off = s->block_offset[b];
425 s->dsp.put_pixels_tab[1][0](frame_current->data[plane] + off,
426 frame_ref->data[plane] + off,
427 s->stride[plane], 8);
428 s->vp3dsp.idct_add(frame_current->data[plane] + off,
429 s->stride[plane], s->block_coeff[b]);
430 }
431 break;
432
433 case VP56_MB_INTER_DELTA_PF:
434 case VP56_MB_INTER_V1_PF:
435 case VP56_MB_INTER_V2_PF:
436 case VP56_MB_INTER_DELTA_GF:
437 case VP56_MB_INTER_4V:
438 case VP56_MB_INTER_V1_GF:
439 case VP56_MB_INTER_V2_GF:
440 for (b=0; b<b_max; b++) {
441 int x_off = b==1 || b==3 ? 8 : 0;
442 int y_off = b==2 || b==3 ? 8 : 0;
443 plane = ff_vp56_b2p[b+ab];
444 vp56_mc(s, b, plane, frame_ref->data[plane], s->stride[plane],
445 16*col+x_off, 16*row+y_off);
446 s->vp3dsp.idct_add(frame_current->data[plane] + s->block_offset[b],
447 s->stride[plane], s->block_coeff[b]);
448 }
449 break;
450 }
451 }
452
453 static int vp56_size_changed(AVCodecContext *avctx)
454 {
455 VP56Context *s = avctx->priv_data;
456 int stride = s->framep[VP56_FRAME_CURRENT]->linesize[0];
457 int i;
458
459 s->plane_width[0] = s->plane_width[3] = avctx->coded_width;
460 s->plane_width[1] = s->plane_width[2] = avctx->coded_width/2;
461 s->plane_height[0] = s->plane_height[3] = avctx->coded_height;
462 s->plane_height[1] = s->plane_height[2] = avctx->coded_height/2;
463
464 for (i=0; i<4; i++)
465 s->stride[i] = s->flip * s->framep[VP56_FRAME_CURRENT]->linesize[i];
466
467 s->mb_width = (avctx->coded_width +15) / 16;
468 s->mb_height = (avctx->coded_height+15) / 16;
469
470 if (s->mb_width > 1000 || s->mb_height > 1000) {
471 avcodec_set_dimensions(avctx, 0, 0);
472 av_log(avctx, AV_LOG_ERROR, "picture too big\n");
473 return -1;
474 }
475
476 s->qscale_table = av_realloc(s->qscale_table, s->mb_width);
477 s->above_blocks = av_realloc(s->above_blocks,
478 (4*s->mb_width+6) * sizeof(*s->above_blocks));
479 s->macroblocks = av_realloc(s->macroblocks,
480 s->mb_width*s->mb_height*sizeof(*s->macroblocks));
481 av_free(s->edge_emu_buffer_alloc);
482 s->edge_emu_buffer_alloc = av_malloc(16*stride);
483 s->edge_emu_buffer = s->edge_emu_buffer_alloc;
484 if (s->flip < 0)
485 s->edge_emu_buffer += 15 * stride;
486
487 return 0;
488 }
489
490 int ff_vp56_decode_frame(AVCodecContext *avctx, void *data, int *data_size,
491 AVPacket *avpkt)
492 {
493 const uint8_t *buf = avpkt->data;
494 VP56Context *s = avctx->priv_data;
495 AVFrame *const p = s->framep[VP56_FRAME_CURRENT];
496 int remaining_buf_size = avpkt->size;
497 int is_alpha, av_uninit(alpha_offset);
498
499 if (s->has_alpha) {
500 if (remaining_buf_size < 3)
501 return -1;
502 alpha_offset = bytestream_get_be24(&buf);
503 remaining_buf_size -= 3;
504 if (remaining_buf_size < alpha_offset)
505 return -1;
506 }
507
508 for (is_alpha=0; is_alpha < 1+s->has_alpha; is_alpha++) {
509 int mb_row, mb_col, mb_row_flip, mb_offset = 0;
510 int block, y, uv, stride_y, stride_uv;
511 int golden_frame = 0;
512 int res;
513
514 s->modelp = &s->models[is_alpha];
515
516 res = s->parse_header(s, buf, remaining_buf_size, &golden_frame);
517 if (!res)
518 return -1;
519
520 if (res == 2) {
521 int i;
522 for (i = 0; i < 4; i++) {
523 if (s->frames[i].data[0])
524 avctx->release_buffer(avctx, &s->frames[i]);
525 }
526 if (is_alpha) {
527 avcodec_set_dimensions(avctx, 0, 0);
528 return -1;
529 }
530 }
531
532 if (!is_alpha) {
533 p->reference = 1;
534 if (ff_get_buffer(avctx, p) < 0) {
535 av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
536 return -1;
537 }
538
539 if (res == 2)
540 if (vp56_size_changed(avctx)) {
541 avctx->release_buffer(avctx, p);
542 return -1;
543 }
544 }
545
546 if (p->key_frame) {
547 p->pict_type = AV_PICTURE_TYPE_I;
548 s->default_models_init(s);
549 for (block=0; block<s->mb_height*s->mb_width; block++)
550 s->macroblocks[block].type = VP56_MB_INTRA;
551 } else {
552 p->pict_type = AV_PICTURE_TYPE_P;
553 vp56_parse_mb_type_models(s);
554 s->parse_vector_models(s);
555 s->mb_type = VP56_MB_INTER_NOVEC_PF;
556 }
557
558 if (s->parse_coeff_models(s))
559 goto next;
560
561 memset(s->prev_dc, 0, sizeof(s->prev_dc));
562 s->prev_dc[1][VP56_FRAME_CURRENT] = 128;
563 s->prev_dc[2][VP56_FRAME_CURRENT] = 128;
564
565 for (block=0; block < 4*s->mb_width+6; block++) {
566 s->above_blocks[block].ref_frame = VP56_FRAME_NONE;
567 s->above_blocks[block].dc_coeff = 0;
568 s->above_blocks[block].not_null_dc = 0;
569 }
570 s->above_blocks[2*s->mb_width + 2].ref_frame = VP56_FRAME_CURRENT;
571 s->above_blocks[3*s->mb_width + 4].ref_frame = VP56_FRAME_CURRENT;
572
573 stride_y = p->linesize[0];
574 stride_uv = p->linesize[1];
575
576 if (s->flip < 0)
577 mb_offset = 7;
578
579 /* main macroblocks loop */
580 for (mb_row=0; mb_row<s->mb_height; mb_row++) {
581 if (s->flip < 0)
582 mb_row_flip = s->mb_height - mb_row - 1;
583 else
584 mb_row_flip = mb_row;
585
586 for (block=0; block<4; block++) {
587 s->left_block[block].ref_frame = VP56_FRAME_NONE;
588 s->left_block[block].dc_coeff = 0;
589 s->left_block[block].not_null_dc = 0;
590 }
591 memset(s->coeff_ctx, 0, sizeof(s->coeff_ctx));
592 memset(s->coeff_ctx_last, 24, sizeof(s->coeff_ctx_last));
593
594 s->above_block_idx[0] = 1;
595 s->above_block_idx[1] = 2;
596 s->above_block_idx[2] = 1;
597 s->above_block_idx[3] = 2;
598 s->above_block_idx[4] = 2*s->mb_width + 2 + 1;
599 s->above_block_idx[5] = 3*s->mb_width + 4 + 1;
600
601 s->block_offset[s->frbi] = (mb_row_flip*16 + mb_offset) * stride_y;
602 s->block_offset[s->srbi] = s->block_offset[s->frbi] + 8*stride_y;
603 s->block_offset[1] = s->block_offset[0] + 8;
604 s->block_offset[3] = s->block_offset[2] + 8;
605 s->block_offset[4] = (mb_row_flip*8 + mb_offset) * stride_uv;
606 s->block_offset[5] = s->block_offset[4];
607
608 for (mb_col=0; mb_col<s->mb_width; mb_col++) {
609 vp56_decode_mb(s, mb_row, mb_col, is_alpha);
610
611 for (y=0; y<4; y++) {
612 s->above_block_idx[y] += 2;
613 s->block_offset[y] += 16;
614 }
615
616 for (uv=4; uv<6; uv++) {
617 s->above_block_idx[uv] += 1;
618 s->block_offset[uv] += 8;
619 }
620 }
621 }
622
623 next:
624 if (p->key_frame || golden_frame) {
625 if (s->framep[VP56_FRAME_GOLDEN]->data[0] &&
626 s->framep[VP56_FRAME_GOLDEN] != s->framep[VP56_FRAME_GOLDEN2])
627 avctx->release_buffer(avctx, s->framep[VP56_FRAME_GOLDEN]);
628 s->framep[VP56_FRAME_GOLDEN] = p;
629 }
630
631 if (s->has_alpha) {
632 FFSWAP(AVFrame *, s->framep[VP56_FRAME_GOLDEN],
633 s->framep[VP56_FRAME_GOLDEN2]);
634 buf += alpha_offset;
635 remaining_buf_size -= alpha_offset;
636 }
637 }
638
639 if (s->framep[VP56_FRAME_PREVIOUS] == s->framep[VP56_FRAME_GOLDEN] ||
640 s->framep[VP56_FRAME_PREVIOUS] == s->framep[VP56_FRAME_GOLDEN2]) {
641 if (s->framep[VP56_FRAME_UNUSED] != s->framep[VP56_FRAME_GOLDEN] &&
642 s->framep[VP56_FRAME_UNUSED] != s->framep[VP56_FRAME_GOLDEN2])
643 FFSWAP(AVFrame *, s->framep[VP56_FRAME_PREVIOUS],
644 s->framep[VP56_FRAME_UNUSED]);
645 else
646 FFSWAP(AVFrame *, s->framep[VP56_FRAME_PREVIOUS],
647 s->framep[VP56_FRAME_UNUSED2]);
648 } else if (s->framep[VP56_FRAME_PREVIOUS]->data[0])
649 avctx->release_buffer(avctx, s->framep[VP56_FRAME_PREVIOUS]);
650 FFSWAP(AVFrame *, s->framep[VP56_FRAME_CURRENT],
651 s->framep[VP56_FRAME_PREVIOUS]);
652
653 p->qstride = 0;
654 p->qscale_table = s->qscale_table;
655 p->qscale_type = FF_QSCALE_TYPE_VP56;
656 *(AVFrame*)data = *p;
657 *data_size = sizeof(AVFrame);
658
659 return avpkt->size;
660 }
661
662 av_cold void ff_vp56_init(AVCodecContext *avctx, int flip, int has_alpha)
663 {
664 VP56Context *s = avctx->priv_data;
665 int i;
666
667 s->avctx = avctx;
668 avctx->pix_fmt = has_alpha ? AV_PIX_FMT_YUVA420P : AV_PIX_FMT_YUV420P;
669
670 ff_dsputil_init(&s->dsp, avctx);
671 ff_vp3dsp_init(&s->vp3dsp, avctx->flags);
672 ff_vp56dsp_init(&s->vp56dsp, avctx->codec->id);
673 ff_init_scantable_permutation(s->dsp.idct_permutation, s->vp3dsp.idct_perm);
674 ff_init_scantable(s->dsp.idct_permutation, &s->scantable,ff_zigzag_direct);
675
676 for (i=0; i<4; i++)
677 s->framep[i] = &s->frames[i];
678 s->framep[VP56_FRAME_UNUSED] = s->framep[VP56_FRAME_GOLDEN];
679 s->framep[VP56_FRAME_UNUSED2] = s->framep[VP56_FRAME_GOLDEN2];
680 s->edge_emu_buffer_alloc = NULL;
681
682 s->above_blocks = NULL;
683 s->macroblocks = NULL;
684 s->quantizer = -1;
685 s->deblock_filtering = 1;
686
687 s->filter = NULL;
688
689 s->has_alpha = has_alpha;
690 if (flip) {
691 s->flip = -1;
692 s->frbi = 2;
693 s->srbi = 0;
694 } else {
695 s->flip = 1;
696 s->frbi = 0;
697 s->srbi = 2;
698 }
699 }
700
701 av_cold int ff_vp56_free(AVCodecContext *avctx)
702 {
703 VP56Context *s = avctx->priv_data;
704
705 av_freep(&s->qscale_table);
706 av_freep(&s->above_blocks);
707 av_freep(&s->macroblocks);
708 av_freep(&s->edge_emu_buffer_alloc);
709 if (s->framep[VP56_FRAME_GOLDEN]->data[0])
710 avctx->release_buffer(avctx, s->framep[VP56_FRAME_GOLDEN]);
711 if (s->framep[VP56_FRAME_GOLDEN2]->data[0])
712 avctx->release_buffer(avctx, s->framep[VP56_FRAME_GOLDEN2]);
713 if (s->framep[VP56_FRAME_PREVIOUS]->data[0])
714 avctx->release_buffer(avctx, s->framep[VP56_FRAME_PREVIOUS]);
715 return 0;
716 }