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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 * 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
34void ff_vp56_init_dequant(VP56Context *s, int quantizer)
35{
36 s->quantizer = quantizer;
37 s->dequant_dc = ff_vp56_dc_dequant[quantizer] << 2;
38 s->dequant_ac = ff_vp56_ac_dequant[quantizer] << 2;
39}
40
41static int vp56_get_vectors_predictors(VP56Context *s, int row, int col,
42 VP56Frame ref_frame)
43{
44 int nb_pred = 0;
45 VP56mv vect[2] = {{0,0}, {0,0}};
46 int pos, offset;
47 VP56mv mvp;
48
49 for (pos=0; pos<12; pos++) {
50 mvp.x = col + ff_vp56_candidate_predictor_pos[pos][0];
51 mvp.y = row + ff_vp56_candidate_predictor_pos[pos][1];
52 if (mvp.x < 0 || mvp.x >= s->mb_width ||
53 mvp.y < 0 || mvp.y >= s->mb_height)
54 continue;
55 offset = mvp.x + s->mb_width*mvp.y;
56
57 if (ff_vp56_reference_frame[s->macroblocks[offset].type] != ref_frame)
58 continue;
59 if ((s->macroblocks[offset].mv.x == vect[0].x &&
60 s->macroblocks[offset].mv.y == vect[0].y) ||
61 (s->macroblocks[offset].mv.x == 0 &&
62 s->macroblocks[offset].mv.y == 0))
63 continue;
64
65 vect[nb_pred++] = s->macroblocks[offset].mv;
66 if (nb_pred > 1) {
67 nb_pred = -1;
68 break;
69 }
70 s->vector_candidate_pos = pos;
71 }
72
73 s->vector_candidate[0] = vect[0];
74 s->vector_candidate[1] = vect[1];
75
76 return nb_pred+1;
77}
78
79static void vp56_parse_mb_type_models(VP56Context *s)
80{
81 VP56RangeCoder *c = &s->c;
82 VP56Model *model = s->modelp;
83 int i, ctx, type;
84
85 for (ctx=0; ctx<3; ctx++) {
86 if (vp56_rac_get_prob_branchy(c, 174)) {
87 int idx = vp56_rac_gets(c, 4);
88 memcpy(model->mb_types_stats[ctx],
89 ff_vp56_pre_def_mb_type_stats[idx][ctx],
90 sizeof(model->mb_types_stats[ctx]));
91 }
92 if (vp56_rac_get_prob_branchy(c, 254)) {
93 for (type=0; type<10; type++) {
94 for(i=0; i<2; i++) {
95 if (vp56_rac_get_prob_branchy(c, 205)) {
96 int delta, sign = vp56_rac_get(c);
97
98 delta = vp56_rac_get_tree(c, ff_vp56_pmbtm_tree,
99 ff_vp56_mb_type_model_model);
100 if (!delta)
101 delta = 4 * vp56_rac_gets(c, 7);
102 model->mb_types_stats[ctx][type][i] += (delta ^ -sign) + sign;
103 }
104 }
105 }
106 }
107 }
108
109 /* compute MB type probability tables based on previous MB type */
110 for (ctx=0; ctx<3; ctx++) {
111 int p[10];
112
113 for (type=0; type<10; type++)
114 p[type] = 100 * model->mb_types_stats[ctx][type][1];
115
116 for (type=0; type<10; type++) {
117 int p02, p34, p0234, p17, p56, p89, p5689, p156789;
118
119 /* conservative MB type probability */
120 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]);
121
122 p[type] = 0; /* same MB type => weight is null */
123
124 /* binary tree parsing probabilities */
125 p02 = p[0] + p[2];
126 p34 = p[3] + p[4];
127 p0234 = p02 + p34;
128 p17 = p[1] + p[7];
129 p56 = p[5] + p[6];
130 p89 = p[8] + p[9];
131 p5689 = p56 + p89;
132 p156789 = p17 + p5689;
133
134 model->mb_type[ctx][type][1] = 1 + 255 * p0234/(1+p0234+p156789);
135 model->mb_type[ctx][type][2] = 1 + 255 * p02 / (1+p0234);
136 model->mb_type[ctx][type][3] = 1 + 255 * p17 / (1+p156789);
137 model->mb_type[ctx][type][4] = 1 + 255 * p[0] / (1+p02);
138 model->mb_type[ctx][type][5] = 1 + 255 * p[3] / (1+p34);
139 model->mb_type[ctx][type][6] = 1 + 255 * p[1] / (1+p17);
140 model->mb_type[ctx][type][7] = 1 + 255 * p56 / (1+p5689);
141 model->mb_type[ctx][type][8] = 1 + 255 * p[5] / (1+p56);
142 model->mb_type[ctx][type][9] = 1 + 255 * p[8] / (1+p89);
143
144 /* restore initial value */
145 p[type] = 100 * model->mb_types_stats[ctx][type][1];
146 }
147 }
148}
149
150static VP56mb vp56_parse_mb_type(VP56Context *s,
151 VP56mb prev_type, int ctx)
152{
153 uint8_t *mb_type_model = s->modelp->mb_type[ctx][prev_type];
154 VP56RangeCoder *c = &s->c;
155
156 if (vp56_rac_get_prob_branchy(c, mb_type_model[0]))
157 return prev_type;
158 else
159 return vp56_rac_get_tree(c, ff_vp56_pmbt_tree, mb_type_model);
160}
161
162static void vp56_decode_4mv(VP56Context *s, int row, int col)
163{
164 VP56mv mv = {0,0};
165 int type[4];
166 int b;
167
168 /* parse each block type */
169 for (b=0; b<4; b++) {
170 type[b] = vp56_rac_gets(&s->c, 2);
171 if (type[b])
172 type[b]++; /* only returns 0, 2, 3 or 4 (all INTER_PF) */
173 }
174
175 /* get vectors */
176 for (b=0; b<4; b++) {
177 switch (type[b]) {
178 case VP56_MB_INTER_NOVEC_PF:
179 s->mv[b] = (VP56mv) {0,0};
180 break;
181 case VP56_MB_INTER_DELTA_PF:
182 s->parse_vector_adjustment(s, &s->mv[b]);
183 break;
184 case VP56_MB_INTER_V1_PF:
185 s->mv[b] = s->vector_candidate[0];
186 break;
187 case VP56_MB_INTER_V2_PF:
188 s->mv[b] = s->vector_candidate[1];
189 break;
190 }
191 mv.x += s->mv[b].x;
192 mv.y += s->mv[b].y;
193 }
194
195 /* this is the one selected for the whole MB for prediction */
196 s->macroblocks[row * s->mb_width + col].mv = s->mv[3];
197
198 /* chroma vectors are average luma vectors */
199 if (s->avctx->codec->id == AV_CODEC_ID_VP5) {
200 s->mv[4].x = s->mv[5].x = RSHIFT(mv.x,2);
201 s->mv[4].y = s->mv[5].y = RSHIFT(mv.y,2);
202 } else {
203 s->mv[4] = s->mv[5] = (VP56mv) {mv.x/4, mv.y/4};
204 }
205}
206
207static VP56mb vp56_decode_mv(VP56Context *s, int row, int col)
208{
209 VP56mv *mv, vect = {0,0};
210 int ctx, b;
211
212 ctx = vp56_get_vectors_predictors(s, row, col, VP56_FRAME_PREVIOUS);
213 s->mb_type = vp56_parse_mb_type(s, s->mb_type, ctx);
214 s->macroblocks[row * s->mb_width + col].type = s->mb_type;
215
216 switch (s->mb_type) {
217 case VP56_MB_INTER_V1_PF:
218 mv = &s->vector_candidate[0];
219 break;
220
221 case VP56_MB_INTER_V2_PF:
222 mv = &s->vector_candidate[1];
223 break;
224
225 case VP56_MB_INTER_V1_GF:
226 vp56_get_vectors_predictors(s, row, col, VP56_FRAME_GOLDEN);
227 mv = &s->vector_candidate[0];
228 break;
229
230 case VP56_MB_INTER_V2_GF:
231 vp56_get_vectors_predictors(s, row, col, VP56_FRAME_GOLDEN);
232 mv = &s->vector_candidate[1];
233 break;
234
235 case VP56_MB_INTER_DELTA_PF:
236 s->parse_vector_adjustment(s, &vect);
237 mv = &vect;
238 break;
239
240 case VP56_MB_INTER_DELTA_GF:
241 vp56_get_vectors_predictors(s, row, col, VP56_FRAME_GOLDEN);
242 s->parse_vector_adjustment(s, &vect);
243 mv = &vect;
244 break;
245
246 case VP56_MB_INTER_4V:
247 vp56_decode_4mv(s, row, col);
248 return s->mb_type;
249
250 default:
251 mv = &vect;
252 break;
253 }
254
255 s->macroblocks[row*s->mb_width + col].mv = *mv;
256
257 /* same vector for all blocks */
258 for (b=0; b<6; b++)
259 s->mv[b] = *mv;
260
261 return s->mb_type;
262}
263
264static VP56mb vp56_conceal_mv(VP56Context *s, int row, int col)
265{
266 VP56mv *mv, vect = {0,0};
267 int b;
268
269 s->mb_type = VP56_MB_INTER_NOVEC_PF;
270 s->macroblocks[row * s->mb_width + col].type = s->mb_type;
271
272 mv = &vect;
273
274 s->macroblocks[row*s->mb_width + col].mv = *mv;
275
276 /* same vector for all blocks */
277 for (b=0; b<6; b++)
278 s->mv[b] = *mv;
279
280 return s->mb_type;
281}
282
283static void vp56_add_predictors_dc(VP56Context *s, VP56Frame ref_frame)
284{
285 int idx = s->idct_scantable[0];
286 int b;
287
288 for (b=0; b<6; b++) {
289 VP56RefDc *ab = &s->above_blocks[s->above_block_idx[b]];
290 VP56RefDc *lb = &s->left_block[ff_vp56_b6to4[b]];
291 int count = 0;
292 int dc = 0;
293 int i;
294
295 if (ref_frame == lb->ref_frame) {
296 dc += lb->dc_coeff;
297 count++;
298 }
299 if (ref_frame == ab->ref_frame) {
300 dc += ab->dc_coeff;
301 count++;
302 }
303 if (s->avctx->codec->id == AV_CODEC_ID_VP5)
304 for (i=0; i<2; i++)
305 if (count < 2 && ref_frame == ab[-1+2*i].ref_frame) {
306 dc += ab[-1+2*i].dc_coeff;
307 count++;
308 }
309 if (count == 0)
310 dc = s->prev_dc[ff_vp56_b2p[b]][ref_frame];
311 else if (count == 2)
312 dc /= 2;
313
314 s->block_coeff[b][idx] += dc;
315 s->prev_dc[ff_vp56_b2p[b]][ref_frame] = s->block_coeff[b][idx];
316 ab->dc_coeff = s->block_coeff[b][idx];
317 ab->ref_frame = ref_frame;
318 lb->dc_coeff = s->block_coeff[b][idx];
319 lb->ref_frame = ref_frame;
320 s->block_coeff[b][idx] *= s->dequant_dc;
321 }
322}
323
324static void vp56_deblock_filter(VP56Context *s, uint8_t *yuv,
325 ptrdiff_t stride, int dx, int dy)
326{
327 int t = ff_vp56_filter_threshold[s->quantizer];
328 if (dx) s->vp56dsp.edge_filter_hor(yuv + 10-dx , stride, t);
329 if (dy) s->vp56dsp.edge_filter_ver(yuv + stride*(10-dy), stride, t);
330}
331
332static void vp56_mc(VP56Context *s, int b, int plane, uint8_t *src,
333 ptrdiff_t stride, int x, int y)
334{
335 uint8_t *dst = s->frames[VP56_FRAME_CURRENT]->data[plane] + s->block_offset[b];
336 uint8_t *src_block;
337 int src_offset;
338 int overlap_offset = 0;
339 int mask = s->vp56_coord_div[b] - 1;
340 int deblock_filtering = s->deblock_filtering;
341 int dx;
342 int dy;
343
344 if (s->avctx->skip_loop_filter >= AVDISCARD_ALL ||
345 (s->avctx->skip_loop_filter >= AVDISCARD_NONKEY
346 && !s->frames[VP56_FRAME_CURRENT]->key_frame))
347 deblock_filtering = 0;
348
349 dx = s->mv[b].x / s->vp56_coord_div[b];
350 dy = s->mv[b].y / s->vp56_coord_div[b];
351
352 if (b >= 4) {
353 x /= 2;
354 y /= 2;
355 }
356 x += dx - 2;
357 y += dy - 2;
358
359 if (x<0 || x+12>=s->plane_width[plane] ||
360 y<0 || y+12>=s->plane_height[plane]) {
361 s->vdsp.emulated_edge_mc(s->edge_emu_buffer,
362 src + s->block_offset[b] + (dy-2)*stride + (dx-2),
363 stride, stride,
364 12, 12, x, y,
365 s->plane_width[plane],
366 s->plane_height[plane]);
367 src_block = s->edge_emu_buffer;
368 src_offset = 2 + 2*stride;
369 } else if (deblock_filtering) {
370 /* only need a 12x12 block, but there is no such dsp function, */
371 /* so copy a 16x12 block */
372 s->hdsp.put_pixels_tab[0][0](s->edge_emu_buffer,
373 src + s->block_offset[b] + (dy-2)*stride + (dx-2),
374 stride, 12);
375 src_block = s->edge_emu_buffer;
376 src_offset = 2 + 2*stride;
377 } else {
378 src_block = src;
379 src_offset = s->block_offset[b] + dy*stride + dx;
380 }
381
382 if (deblock_filtering)
383 vp56_deblock_filter(s, src_block, stride, dx&7, dy&7);
384
385 if (s->mv[b].x & mask)
386 overlap_offset += (s->mv[b].x > 0) ? 1 : -1;
387 if (s->mv[b].y & mask)
388 overlap_offset += (s->mv[b].y > 0) ? stride : -stride;
389
390 if (overlap_offset) {
391 if (s->filter)
392 s->filter(s, dst, src_block, src_offset, src_offset+overlap_offset,
393 stride, s->mv[b], mask, s->filter_selection, b<4);
394 else
395 s->vp3dsp.put_no_rnd_pixels_l2(dst, src_block+src_offset,
396 src_block+src_offset+overlap_offset,
397 stride, 8);
398 } else {
399 s->hdsp.put_pixels_tab[1][0](dst, src_block+src_offset, stride, 8);
400 }
401}
402
403static av_always_inline void vp56_render_mb(VP56Context *s, int row, int col, int is_alpha, VP56mb mb_type)
404{
405 int b, ab, b_max, plane, off;
406 AVFrame *frame_current, *frame_ref;
407 VP56Frame ref_frame = ff_vp56_reference_frame[mb_type];
408
409 vp56_add_predictors_dc(s, ref_frame);
410
411 frame_current = s->frames[VP56_FRAME_CURRENT];
412 frame_ref = s->frames[ref_frame];
413 if (mb_type != VP56_MB_INTRA && !frame_ref->data[0])
414 return;
415
416 ab = 6*is_alpha;
417 b_max = 6 - 2*is_alpha;
418
419 switch (mb_type) {
420 case VP56_MB_INTRA:
421 for (b=0; b<b_max; b++) {
422 plane = ff_vp56_b2p[b+ab];
423 s->vp3dsp.idct_put(frame_current->data[plane] + s->block_offset[b],
424 s->stride[plane], s->block_coeff[b]);
425 }
426 break;
427
428 case VP56_MB_INTER_NOVEC_PF:
429 case VP56_MB_INTER_NOVEC_GF:
430 for (b=0; b<b_max; b++) {
431 plane = ff_vp56_b2p[b+ab];
432 off = s->block_offset[b];
433 s->hdsp.put_pixels_tab[1][0](frame_current->data[plane] + off,
434 frame_ref->data[plane] + off,
435 s->stride[plane], 8);
436 s->vp3dsp.idct_add(frame_current->data[plane] + off,
437 s->stride[plane], s->block_coeff[b]);
438 }
439 break;
440
441 case VP56_MB_INTER_DELTA_PF:
442 case VP56_MB_INTER_V1_PF:
443 case VP56_MB_INTER_V2_PF:
444 case VP56_MB_INTER_DELTA_GF:
445 case VP56_MB_INTER_4V:
446 case VP56_MB_INTER_V1_GF:
447 case VP56_MB_INTER_V2_GF:
448 for (b=0; b<b_max; b++) {
449 int x_off = b==1 || b==3 ? 8 : 0;
450 int y_off = b==2 || b==3 ? 8 : 0;
451 plane = ff_vp56_b2p[b+ab];
452 vp56_mc(s, b, plane, frame_ref->data[plane], s->stride[plane],
453 16*col+x_off, 16*row+y_off);
454 s->vp3dsp.idct_add(frame_current->data[plane] + s->block_offset[b],
455 s->stride[plane], s->block_coeff[b]);
456 }
457 break;
458 }
459
460 if (is_alpha) {
461 s->block_coeff[4][0] = 0;
462 s->block_coeff[5][0] = 0;
463 }
464}
465
466static int vp56_decode_mb(VP56Context *s, int row, int col, int is_alpha)
467{
468 VP56mb mb_type;
469 int ret;
470
471 if (s->frames[VP56_FRAME_CURRENT]->key_frame)
472 mb_type = VP56_MB_INTRA;
473 else
474 mb_type = vp56_decode_mv(s, row, col);
475
476 ret = s->parse_coeff(s);
477 if (ret < 0)
478 return ret;
479
480 vp56_render_mb(s, row, col, is_alpha, mb_type);
481
482 return 0;
483}
484
485static int vp56_conceal_mb(VP56Context *s, int row, int col, int is_alpha)
486{
487 VP56mb mb_type;
488
489 if (s->frames[VP56_FRAME_CURRENT]->key_frame)
490 mb_type = VP56_MB_INTRA;
491 else
492 mb_type = vp56_conceal_mv(s, row, col);
493
494 vp56_render_mb(s, row, col, is_alpha, mb_type);
495
496 return 0;
497}
498
499static int vp56_size_changed(VP56Context *s)
500{
501 AVCodecContext *avctx = s->avctx;
502 int stride = s->frames[VP56_FRAME_CURRENT]->linesize[0];
503 int i;
504
505 s->plane_width[0] = s->plane_width[3] = avctx->coded_width;
506 s->plane_width[1] = s->plane_width[2] = avctx->coded_width/2;
507 s->plane_height[0] = s->plane_height[3] = avctx->coded_height;
508 s->plane_height[1] = s->plane_height[2] = avctx->coded_height/2;
509
510 s->have_undamaged_frame = 0;
511
512 for (i=0; i<4; i++)
513 s->stride[i] = s->flip * s->frames[VP56_FRAME_CURRENT]->linesize[i];
514
515 s->mb_width = (avctx->coded_width +15) / 16;
516 s->mb_height = (avctx->coded_height+15) / 16;
517
518 if (s->mb_width > 1000 || s->mb_height > 1000) {
519 ff_set_dimensions(avctx, 0, 0);
520 av_log(avctx, AV_LOG_ERROR, "picture too big\n");
521 return AVERROR_INVALIDDATA;
522 }
523
524 av_reallocp_array(&s->above_blocks, 4*s->mb_width+6,
525 sizeof(*s->above_blocks));
526 av_reallocp_array(&s->macroblocks, s->mb_width*s->mb_height,
527 sizeof(*s->macroblocks));
528 av_free(s->edge_emu_buffer_alloc);
529 s->edge_emu_buffer_alloc = av_malloc(16*stride);
530 s->edge_emu_buffer = s->edge_emu_buffer_alloc;
531 if (!s->above_blocks || !s->macroblocks || !s->edge_emu_buffer_alloc)
532 return AVERROR(ENOMEM);
533 if (s->flip < 0)
534 s->edge_emu_buffer += 15 * stride;
535
536 if (s->alpha_context)
537 return vp56_size_changed(s->alpha_context);
538
539 return 0;
540}
541
542static int ff_vp56_decode_mbs(AVCodecContext *avctx, void *, int, int);
543
544int ff_vp56_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
545 AVPacket *avpkt)
546{
547 const uint8_t *buf = avpkt->data;
548 VP56Context *s = avctx->priv_data;
549 AVFrame *const p = s->frames[VP56_FRAME_CURRENT];
550 int remaining_buf_size = avpkt->size;
551 int av_uninit(alpha_offset);
552 int i, res;
553 int ret;
554
555 if (s->has_alpha) {
556 if (remaining_buf_size < 3)
557 return AVERROR_INVALIDDATA;
558 alpha_offset = bytestream_get_be24(&buf);
559 remaining_buf_size -= 3;
560 if (remaining_buf_size < alpha_offset)
561 return AVERROR_INVALIDDATA;
562 }
563
564 res = s->parse_header(s, buf, remaining_buf_size);
565 if (res < 0)
566 return res;
567
568 if (res == VP56_SIZE_CHANGE) {
569 for (i = 0; i < 4; i++) {
570 av_frame_unref(s->frames[i]);
571 if (s->alpha_context)
572 av_frame_unref(s->alpha_context->frames[i]);
573 }
574 }
575
576 ret = ff_get_buffer(avctx, p, AV_GET_BUFFER_FLAG_REF);
577 if (ret < 0) {
578 if (res == VP56_SIZE_CHANGE)
579 ff_set_dimensions(avctx, 0, 0);
580 return ret;
581 }
582
583 if (avctx->pix_fmt == AV_PIX_FMT_YUVA420P) {
584 av_frame_unref(s->alpha_context->frames[VP56_FRAME_CURRENT]);
585 if ((ret = av_frame_ref(s->alpha_context->frames[VP56_FRAME_CURRENT], p)) < 0) {
586 av_frame_unref(p);
587 if (res == VP56_SIZE_CHANGE)
588 ff_set_dimensions(avctx, 0, 0);
589 return ret;
590 }
591 }
592
593 if (res == VP56_SIZE_CHANGE) {
594 if (vp56_size_changed(s)) {
595 av_frame_unref(p);
596 return AVERROR_INVALIDDATA;
597 }
598 }
599
600 if (avctx->pix_fmt == AV_PIX_FMT_YUVA420P) {
601 int bak_w = avctx->width;
602 int bak_h = avctx->height;
603 int bak_cw = avctx->coded_width;
604 int bak_ch = avctx->coded_height;
605 buf += alpha_offset;
606 remaining_buf_size -= alpha_offset;
607
608 res = s->alpha_context->parse_header(s->alpha_context, buf, remaining_buf_size);
609 if (res != 0) {
610 if(res==VP56_SIZE_CHANGE) {
611 av_log(avctx, AV_LOG_ERROR, "Alpha reconfiguration\n");
612 avctx->width = bak_w;
613 avctx->height = bak_h;
614 avctx->coded_width = bak_cw;
615 avctx->coded_height = bak_ch;
616 }
617 av_frame_unref(p);
618 return AVERROR_INVALIDDATA;
619 }
620 }
621
622 s->discard_frame = 0;
623 avctx->execute2(avctx, ff_vp56_decode_mbs, 0, 0, (avctx->pix_fmt == AV_PIX_FMT_YUVA420P) + 1);
624
625 if (s->discard_frame)
626 return AVERROR_INVALIDDATA;
627
628 if ((res = av_frame_ref(data, p)) < 0)
629 return res;
630 *got_frame = 1;
631
632 return avpkt->size;
633}
634
635static int ff_vp56_decode_mbs(AVCodecContext *avctx, void *data,
636 int jobnr, int threadnr)
637{
638 VP56Context *s0 = avctx->priv_data;
639 int is_alpha = (jobnr == 1);
640 VP56Context *s = is_alpha ? s0->alpha_context : s0;
641 AVFrame *const p = s->frames[VP56_FRAME_CURRENT];
642 int mb_row, mb_col, mb_row_flip, mb_offset = 0;
643 int block, y, uv;
644 ptrdiff_t stride_y, stride_uv;
645 int res;
646 int damaged = 0;
647
648 if (p->key_frame) {
649 p->pict_type = AV_PICTURE_TYPE_I;
650 s->default_models_init(s);
651 for (block=0; block<s->mb_height*s->mb_width; block++)
652 s->macroblocks[block].type = VP56_MB_INTRA;
653 } else {
654 p->pict_type = AV_PICTURE_TYPE_P;
655 vp56_parse_mb_type_models(s);
656 s->parse_vector_models(s);
657 s->mb_type = VP56_MB_INTER_NOVEC_PF;
658 }
659
660 if (s->parse_coeff_models(s))
661 goto next;
662
663 memset(s->prev_dc, 0, sizeof(s->prev_dc));
664 s->prev_dc[1][VP56_FRAME_CURRENT] = 128;
665 s->prev_dc[2][VP56_FRAME_CURRENT] = 128;
666
667 for (block=0; block < 4*s->mb_width+6; block++) {
668 s->above_blocks[block].ref_frame = VP56_FRAME_NONE;
669 s->above_blocks[block].dc_coeff = 0;
670 s->above_blocks[block].not_null_dc = 0;
671 }
672 s->above_blocks[2*s->mb_width + 2].ref_frame = VP56_FRAME_CURRENT;
673 s->above_blocks[3*s->mb_width + 4].ref_frame = VP56_FRAME_CURRENT;
674
675 stride_y = p->linesize[0];
676 stride_uv = p->linesize[1];
677
678 if (s->flip < 0)
679 mb_offset = 7;
680
681 /* main macroblocks loop */
682 for (mb_row=0; mb_row<s->mb_height; mb_row++) {
683 if (s->flip < 0)
684 mb_row_flip = s->mb_height - mb_row - 1;
685 else
686 mb_row_flip = mb_row;
687
688 for (block=0; block<4; block++) {
689 s->left_block[block].ref_frame = VP56_FRAME_NONE;
690 s->left_block[block].dc_coeff = 0;
691 s->left_block[block].not_null_dc = 0;
692 }
693 memset(s->coeff_ctx, 0, sizeof(s->coeff_ctx));
694 memset(s->coeff_ctx_last, 24, sizeof(s->coeff_ctx_last));
695
696 s->above_block_idx[0] = 1;
697 s->above_block_idx[1] = 2;
698 s->above_block_idx[2] = 1;
699 s->above_block_idx[3] = 2;
700 s->above_block_idx[4] = 2*s->mb_width + 2 + 1;
701 s->above_block_idx[5] = 3*s->mb_width + 4 + 1;
702
703 s->block_offset[s->frbi] = (mb_row_flip*16 + mb_offset) * stride_y;
704 s->block_offset[s->srbi] = s->block_offset[s->frbi] + 8*stride_y;
705 s->block_offset[1] = s->block_offset[0] + 8;
706 s->block_offset[3] = s->block_offset[2] + 8;
707 s->block_offset[4] = (mb_row_flip*8 + mb_offset) * stride_uv;
708 s->block_offset[5] = s->block_offset[4];
709
710 for (mb_col=0; mb_col<s->mb_width; mb_col++) {
711 if (!damaged) {
712 int ret = vp56_decode_mb(s, mb_row, mb_col, is_alpha);
713 if (ret < 0) {
714 damaged = 1;
715 if (!s->have_undamaged_frame || !avctx->error_concealment) {
716 s->discard_frame = 1;
717 return AVERROR_INVALIDDATA;
718 }
719 }
720 }
721 if (damaged)
722 vp56_conceal_mb(s, mb_row, mb_col, is_alpha);
723
724 for (y=0; y<4; y++) {
725 s->above_block_idx[y] += 2;
726 s->block_offset[y] += 16;
727 }
728
729 for (uv=4; uv<6; uv++) {
730 s->above_block_idx[uv] += 1;
731 s->block_offset[uv] += 8;
732 }
733 }
734 }
735
736 if (!damaged)
737 s->have_undamaged_frame = 1;
738
739next:
740 if (p->key_frame || s->golden_frame) {
741 av_frame_unref(s->frames[VP56_FRAME_GOLDEN]);
742 if ((res = av_frame_ref(s->frames[VP56_FRAME_GOLDEN], p)) < 0)
743 return res;
744 }
745
746 av_frame_unref(s->frames[VP56_FRAME_PREVIOUS]);
747 FFSWAP(AVFrame *, s->frames[VP56_FRAME_CURRENT],
748 s->frames[VP56_FRAME_PREVIOUS]);
749 return 0;
750}
751
752av_cold int ff_vp56_init(AVCodecContext *avctx, int flip, int has_alpha)
753{
754 VP56Context *s = avctx->priv_data;
755 return ff_vp56_init_context(avctx, s, flip, has_alpha);
756}
757
758av_cold int ff_vp56_init_context(AVCodecContext *avctx, VP56Context *s,
759 int flip, int has_alpha)
760{
761 int i;
762
763 s->avctx = avctx;
764 avctx->pix_fmt = has_alpha ? AV_PIX_FMT_YUVA420P : AV_PIX_FMT_YUV420P;
765 if (avctx->skip_alpha) avctx->pix_fmt = AV_PIX_FMT_YUV420P;
766
767 ff_h264chroma_init(&s->h264chroma, 8);
768 ff_hpeldsp_init(&s->hdsp, avctx->flags);
769 ff_videodsp_init(&s->vdsp, 8);
770 ff_vp3dsp_init(&s->vp3dsp, avctx->flags);
771 for (i = 0; i < 64; i++) {
772#define TRANSPOSE(x) (((x) >> 3) | (((x) & 7) << 3))
773 s->idct_scantable[i] = TRANSPOSE(ff_zigzag_direct[i]);
774#undef TRANSPOSE
775 }
776
777 for (i = 0; i < FF_ARRAY_ELEMS(s->frames); i++) {
778 s->frames[i] = av_frame_alloc();
779 if (!s->frames[i]) {
780 ff_vp56_free(avctx);
781 return AVERROR(ENOMEM);
782 }
783 }
784 s->edge_emu_buffer_alloc = NULL;
785
786 s->above_blocks = NULL;
787 s->macroblocks = NULL;
788 s->quantizer = -1;
789 s->deblock_filtering = 1;
790 s->golden_frame = 0;
791
792 s->filter = NULL;
793
794 s->has_alpha = has_alpha;
795
796 s->modelp = &s->model;
797
798 if (flip) {
799 s->flip = -1;
800 s->frbi = 2;
801 s->srbi = 0;
802 } else {
803 s->flip = 1;
804 s->frbi = 0;
805 s->srbi = 2;
806 }
807
808 return 0;
809}
810
811av_cold int ff_vp56_free(AVCodecContext *avctx)
812{
813 VP56Context *s = avctx->priv_data;
814 return ff_vp56_free_context(s);
815}
816
817av_cold int ff_vp56_free_context(VP56Context *s)
818{
819 int i;
820
821 av_freep(&s->above_blocks);
822 av_freep(&s->macroblocks);
823 av_freep(&s->edge_emu_buffer_alloc);
824
825 for (i = 0; i < FF_ARRAY_ELEMS(s->frames); i++)
826 av_frame_free(&s->frames[i]);
827
828 return 0;
829}
830
generated by cgit at 2024-05-17 03:08:53 (GMT)