2 * Copyright (C) 2006 Aurelien Jacobs <aurel@gnuage.org>
4 * This file is part of FFmpeg.
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.
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.
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
23 * VP5 and VP6 compatible video decoder (common features)
27 #include "bytestream.h"
29 #include "h264chroma.h"
35 void ff_vp56_init_dequant(VP56Context *s, int quantizer)
37 if (s->quantizer != quantizer)
38 ff_vp3dsp_set_bounding_values(s->bounding_values_array, ff_vp56_filter_threshold[quantizer]);
39 s->quantizer = quantizer;
40 s->dequant_dc = ff_vp56_dc_dequant[quantizer] << 2;
41 s->dequant_ac = ff_vp56_ac_dequant[quantizer] << 2;
44 static int vp56_get_vectors_predictors(VP56Context *s, int row, int col,
48 VP56mv vect[2] = {{0,0}, {0,0}};
52 for (pos=0; pos<12; pos++) {
53 mvp.x = col + ff_vp56_candidate_predictor_pos[pos][0];
54 mvp.y = row + ff_vp56_candidate_predictor_pos[pos][1];
55 if (mvp.x < 0 || mvp.x >= s->mb_width ||
56 mvp.y < 0 || mvp.y >= s->mb_height)
58 offset = mvp.x + s->mb_width*mvp.y;
60 if (ff_vp56_reference_frame[s->macroblocks[offset].type] != ref_frame)
62 if ((s->macroblocks[offset].mv.x == vect[0].x &&
63 s->macroblocks[offset].mv.y == vect[0].y) ||
64 (s->macroblocks[offset].mv.x == 0 &&
65 s->macroblocks[offset].mv.y == 0))
68 vect[nb_pred++] = s->macroblocks[offset].mv;
73 s->vector_candidate_pos = pos;
76 s->vector_candidate[0] = vect[0];
77 s->vector_candidate[1] = vect[1];
82 static void vp56_parse_mb_type_models(VP56Context *s)
84 VPXRangeCoder *c = &s->c;
85 VP56Model *model = s->modelp;
88 for (ctx=0; ctx<3; ctx++) {
89 if (vpx_rac_get_prob_branchy(c, 174)) {
90 int idx = vp56_rac_gets(c, 4);
91 memcpy(model->mb_types_stats[ctx],
92 ff_vp56_pre_def_mb_type_stats[idx][ctx],
93 sizeof(model->mb_types_stats[ctx]));
95 if (vpx_rac_get_prob_branchy(c, 254)) {
96 for (type=0; type<10; type++) {
98 if (vpx_rac_get_prob_branchy(c, 205)) {
99 int delta, sign = vpx_rac_get(c);
101 delta = vp56_rac_get_tree(c, ff_vp56_pmbtm_tree,
102 ff_vp56_mb_type_model_model);
104 delta = 4 * vp56_rac_gets(c, 7);
105 model->mb_types_stats[ctx][type][i] += (delta ^ -sign) + sign;
112 /* compute MB type probability tables based on previous MB type */
113 for (ctx=0; ctx<3; ctx++) {
116 for (type=0; type<10; type++)
117 p[type] = 100 * model->mb_types_stats[ctx][type][1];
119 for (type=0; type<10; type++) {
120 int p02, p34, p0234, p17, p56, p89, p5689, p156789;
122 /* conservative MB type probability */
123 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]);
125 p[type] = 0; /* same MB type => weight is null */
127 /* binary tree parsing probabilities */
135 p156789 = p17 + p5689;
137 model->mb_type[ctx][type][1] = 1 + 255 * p0234/(1+p0234+p156789);
138 model->mb_type[ctx][type][2] = 1 + 255 * p02 / (1+p0234);
139 model->mb_type[ctx][type][3] = 1 + 255 * p17 / (1+p156789);
140 model->mb_type[ctx][type][4] = 1 + 255 * p[0] / (1+p02);
141 model->mb_type[ctx][type][5] = 1 + 255 * p[3] / (1+p34);
142 model->mb_type[ctx][type][6] = 1 + 255 * p[1] / (1+p17);
143 model->mb_type[ctx][type][7] = 1 + 255 * p56 / (1+p5689);
144 model->mb_type[ctx][type][8] = 1 + 255 * p[5] / (1+p56);
145 model->mb_type[ctx][type][9] = 1 + 255 * p[8] / (1+p89);
147 /* restore initial value */
148 p[type] = 100 * model->mb_types_stats[ctx][type][1];
153 static VP56mb vp56_parse_mb_type(VP56Context *s,
154 VP56mb prev_type, int ctx)
156 uint8_t *mb_type_model = s->modelp->mb_type[ctx][prev_type];
157 VPXRangeCoder *c = &s->c;
159 if (vpx_rac_get_prob_branchy(c, mb_type_model[0]))
162 return vp56_rac_get_tree(c, ff_vp56_pmbt_tree, mb_type_model);
165 static void vp56_decode_4mv(VP56Context *s, int row, int col)
171 /* parse each block type */
172 for (b=0; b<4; b++) {
173 type[b] = vp56_rac_gets(&s->c, 2);
175 type[b]++; /* only returns 0, 2, 3 or 4 (all INTER_PF) */
179 for (b=0; b<4; b++) {
181 case VP56_MB_INTER_NOVEC_PF:
182 s->mv[b] = (VP56mv) {0,0};
184 case VP56_MB_INTER_DELTA_PF:
185 s->parse_vector_adjustment(s, &s->mv[b]);
187 case VP56_MB_INTER_V1_PF:
188 s->mv[b] = s->vector_candidate[0];
190 case VP56_MB_INTER_V2_PF:
191 s->mv[b] = s->vector_candidate[1];
198 /* this is the one selected for the whole MB for prediction */
199 s->macroblocks[row * s->mb_width + col].mv = s->mv[3];
201 /* chroma vectors are average luma vectors */
202 s->mv[4].x = s->mv[5].x = RSHIFT(mv.x,2);
203 s->mv[4].y = s->mv[5].y = RSHIFT(mv.y,2);
206 static VP56mb vp56_decode_mv(VP56Context *s, int row, int col)
208 VP56mv *mv, vect = {0,0};
211 ctx = vp56_get_vectors_predictors(s, row, col, VP56_FRAME_PREVIOUS);
212 s->mb_type = vp56_parse_mb_type(s, s->mb_type, ctx);
213 s->macroblocks[row * s->mb_width + col].type = s->mb_type;
215 switch (s->mb_type) {
216 case VP56_MB_INTER_V1_PF:
217 mv = &s->vector_candidate[0];
220 case VP56_MB_INTER_V2_PF:
221 mv = &s->vector_candidate[1];
224 case VP56_MB_INTER_V1_GF:
225 vp56_get_vectors_predictors(s, row, col, VP56_FRAME_GOLDEN);
226 mv = &s->vector_candidate[0];
229 case VP56_MB_INTER_V2_GF:
230 vp56_get_vectors_predictors(s, row, col, VP56_FRAME_GOLDEN);
231 mv = &s->vector_candidate[1];
234 case VP56_MB_INTER_DELTA_PF:
235 s->parse_vector_adjustment(s, &vect);
239 case VP56_MB_INTER_DELTA_GF:
240 vp56_get_vectors_predictors(s, row, col, VP56_FRAME_GOLDEN);
241 s->parse_vector_adjustment(s, &vect);
245 case VP56_MB_INTER_4V:
246 vp56_decode_4mv(s, row, col);
254 s->macroblocks[row*s->mb_width + col].mv = *mv;
256 /* same vector for all blocks */
263 static VP56mb vp56_conceal_mv(VP56Context *s, int row, int col)
265 VP56mv *mv, vect = {0,0};
268 s->mb_type = VP56_MB_INTER_NOVEC_PF;
269 s->macroblocks[row * s->mb_width + col].type = s->mb_type;
273 s->macroblocks[row*s->mb_width + col].mv = *mv;
275 /* same vector for all blocks */
282 static void vp56_add_predictors_dc(VP56Context *s, VP56Frame ref_frame)
284 int idx = s->idct_scantable[0];
287 for (b=0; b<6; b++) {
288 VP56RefDc *ab = &s->above_blocks[s->above_block_idx[b]];
289 VP56RefDc *lb = &s->left_block[ff_vp56_b6to4[b]];
294 if (ref_frame == lb->ref_frame) {
298 if (ref_frame == ab->ref_frame) {
302 if (s->avctx->codec->id == AV_CODEC_ID_VP5)
304 if (count < 2 && ref_frame == ab[-1+2*i].ref_frame) {
305 dc += ab[-1+2*i].dc_coeff;
309 dc = s->prev_dc[ff_vp56_b2p[b]][ref_frame];
313 s->block_coeff[b][idx] += dc;
314 s->prev_dc[ff_vp56_b2p[b]][ref_frame] = s->block_coeff[b][idx];
315 ab->dc_coeff = s->block_coeff[b][idx];
316 ab->ref_frame = ref_frame;
317 lb->dc_coeff = s->block_coeff[b][idx];
318 lb->ref_frame = ref_frame;
319 s->block_coeff[b][idx] *= s->dequant_dc;
323 static void vp56_deblock_filter(VP56Context *s, uint8_t *yuv,
324 ptrdiff_t stride, int dx, int dy)
326 if (s->avctx->codec->id == AV_CODEC_ID_VP5) {
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);
331 int * bounding_values = s->bounding_values_array + 127;
333 ff_vp3dsp_h_loop_filter_12(yuv + 10-dx, stride, bounding_values);
335 ff_vp3dsp_v_loop_filter_12(yuv + stride*(10-dy), stride, bounding_values);
339 static void vp56_mc(VP56Context *s, int b, int plane, uint8_t *src,
340 ptrdiff_t stride, int x, int y)
342 uint8_t *dst = s->frames[VP56_FRAME_CURRENT]->data[plane] + s->block_offset[b];
345 int overlap_offset = 0;
346 int mask = s->vp56_coord_div[b] - 1;
347 int deblock_filtering = s->deblock_filtering;
351 if (s->avctx->skip_loop_filter >= AVDISCARD_ALL ||
352 (s->avctx->skip_loop_filter >= AVDISCARD_NONKEY
353 && !(s->frames[VP56_FRAME_CURRENT]->flags & AV_FRAME_FLAG_KEY)))
354 deblock_filtering = 0;
356 dx = s->mv[b].x / s->vp56_coord_div[b];
357 dy = s->mv[b].y / s->vp56_coord_div[b];
366 if (x<0 || x+12>=s->plane_width[plane] ||
367 y<0 || y+12>=s->plane_height[plane]) {
368 s->vdsp.emulated_edge_mc(s->edge_emu_buffer,
369 src + s->block_offset[b] + (dy-2)*stride + (dx-2),
372 s->plane_width[plane],
373 s->plane_height[plane]);
374 src_block = s->edge_emu_buffer;
375 src_offset = 2 + 2*stride;
376 } else if (deblock_filtering) {
377 /* only need a 12x12 block, but there is no such dsp function, */
378 /* so copy a 16x12 block */
379 s->hdsp.put_pixels_tab[0][0](s->edge_emu_buffer,
380 src + s->block_offset[b] + (dy-2)*stride + (dx-2),
382 src_block = s->edge_emu_buffer;
383 src_offset = 2 + 2*stride;
386 src_offset = s->block_offset[b] + dy*stride + dx;
389 if (deblock_filtering)
390 vp56_deblock_filter(s, src_block, stride, dx&7, dy&7);
392 if (s->mv[b].x & mask)
393 overlap_offset += (s->mv[b].x > 0) ? 1 : -1;
394 if (s->mv[b].y & mask)
395 overlap_offset += (s->mv[b].y > 0) ? stride : -stride;
397 if (overlap_offset) {
399 s->filter(s, dst, src_block, src_offset, src_offset+overlap_offset,
400 stride, s->mv[b], mask, s->filter_selection, b<4);
402 s->vp3dsp.put_no_rnd_pixels_l2(dst, src_block+src_offset,
403 src_block+src_offset+overlap_offset,
406 s->hdsp.put_pixels_tab[1][0](dst, src_block+src_offset, stride, 8);
410 static void vp56_idct_put(VP56Context *s, uint8_t * dest, ptrdiff_t stride, int16_t *block, int selector)
412 if (selector > 10 || selector == 1)
413 s->vp3dsp.idct_put(dest, stride, block);
415 ff_vp3dsp_idct10_put(dest, stride, block);
418 static void vp56_idct_add(VP56Context *s, uint8_t * dest, ptrdiff_t stride, int16_t *block, int selector)
421 s->vp3dsp.idct_add(dest, stride, block);
422 else if (selector > 1)
423 ff_vp3dsp_idct10_add(dest, stride, block);
425 s->vp3dsp.idct_dc_add(dest, stride, block);
428 static av_always_inline void vp56_render_mb(VP56Context *s, int row, int col, int is_alpha, VP56mb mb_type)
430 int b, ab, b_max, plane, off;
431 AVFrame *frame_current, *frame_ref;
432 VP56Frame ref_frame = ff_vp56_reference_frame[mb_type];
434 vp56_add_predictors_dc(s, ref_frame);
436 frame_current = s->frames[VP56_FRAME_CURRENT];
437 frame_ref = s->frames[ref_frame];
438 if (mb_type != VP56_MB_INTRA && !frame_ref->data[0])
442 b_max = 6 - 2*is_alpha;
446 for (b=0; b<b_max; b++) {
447 plane = ff_vp56_b2p[b+ab];
448 vp56_idct_put(s, frame_current->data[plane] + s->block_offset[b],
449 s->stride[plane], s->block_coeff[b], s->idct_selector[b]);
453 case VP56_MB_INTER_NOVEC_PF:
454 case VP56_MB_INTER_NOVEC_GF:
455 for (b=0; b<b_max; b++) {
456 plane = ff_vp56_b2p[b+ab];
457 off = s->block_offset[b];
458 s->hdsp.put_pixels_tab[1][0](frame_current->data[plane] + off,
459 frame_ref->data[plane] + off,
460 s->stride[plane], 8);
461 vp56_idct_add(s, frame_current->data[plane] + off,
462 s->stride[plane], s->block_coeff[b], s->idct_selector[b]);
466 case VP56_MB_INTER_DELTA_PF:
467 case VP56_MB_INTER_V1_PF:
468 case VP56_MB_INTER_V2_PF:
469 case VP56_MB_INTER_DELTA_GF:
470 case VP56_MB_INTER_4V:
471 case VP56_MB_INTER_V1_GF:
472 case VP56_MB_INTER_V2_GF:
473 for (b=0; b<b_max; b++) {
474 int x_off = b==1 || b==3 ? 8 : 0;
475 int y_off = b==2 || b==3 ? 8 : 0;
476 plane = ff_vp56_b2p[b+ab];
477 vp56_mc(s, b, plane, frame_ref->data[plane], s->stride[plane],
478 16*col+x_off, 16*row+y_off);
479 vp56_idct_add(s, frame_current->data[plane] + s->block_offset[b],
480 s->stride[plane], s->block_coeff[b], s->idct_selector[b]);
486 s->block_coeff[4][0] = 0;
487 s->block_coeff[5][0] = 0;
491 static int vp56_decode_mb(VP56Context *s, int row, int col, int is_alpha)
496 if (s->frames[VP56_FRAME_CURRENT]->flags & AV_FRAME_FLAG_KEY)
497 mb_type = VP56_MB_INTRA;
499 mb_type = vp56_decode_mv(s, row, col);
501 ret = s->parse_coeff(s);
505 vp56_render_mb(s, row, col, is_alpha, mb_type);
510 static int vp56_conceal_mb(VP56Context *s, int row, int col, int is_alpha)
514 if (s->frames[VP56_FRAME_CURRENT]->flags & AV_FRAME_FLAG_KEY)
515 mb_type = VP56_MB_INTRA;
517 mb_type = vp56_conceal_mv(s, row, col);
519 vp56_render_mb(s, row, col, is_alpha, mb_type);
524 static int vp56_size_changed(VP56Context *s)
526 AVCodecContext *avctx = s->avctx;
527 int stride = s->frames[VP56_FRAME_CURRENT]->linesize[0];
530 s->plane_width[0] = s->plane_width[3] = avctx->coded_width;
531 s->plane_width[1] = s->plane_width[2] = avctx->coded_width/2;
532 s->plane_height[0] = s->plane_height[3] = avctx->coded_height;
533 s->plane_height[1] = s->plane_height[2] = avctx->coded_height/2;
535 s->have_undamaged_frame = 0;
538 s->stride[i] = s->flip * s->frames[VP56_FRAME_CURRENT]->linesize[i];
540 s->mb_width = (avctx->coded_width +15) / 16;
541 s->mb_height = (avctx->coded_height+15) / 16;
543 if (s->mb_width > 1000 || s->mb_height > 1000) {
544 ff_set_dimensions(avctx, 0, 0);
545 av_log(avctx, AV_LOG_ERROR, "picture too big\n");
546 return AVERROR_INVALIDDATA;
549 av_reallocp_array(&s->above_blocks, 4*s->mb_width+6,
550 sizeof(*s->above_blocks));
551 av_reallocp_array(&s->macroblocks, s->mb_width*s->mb_height,
552 sizeof(*s->macroblocks));
553 av_free(s->edge_emu_buffer_alloc);
554 s->edge_emu_buffer_alloc = av_malloc(16*stride);
555 s->edge_emu_buffer = s->edge_emu_buffer_alloc;
556 if (!s->above_blocks || !s->macroblocks || !s->edge_emu_buffer_alloc)
557 return AVERROR(ENOMEM);
559 s->edge_emu_buffer += 15 * stride;
561 if (s->alpha_context)
562 return vp56_size_changed(s->alpha_context);
567 static int ff_vp56_decode_mbs(AVCodecContext *avctx, void *, int, int);
569 int ff_vp56_decode_frame(AVCodecContext *avctx, AVFrame *rframe,
570 int *got_frame, AVPacket *avpkt)
572 const uint8_t *buf = avpkt->data;
573 VP56Context *s = avctx->priv_data;
574 AVFrame *const p = s->frames[VP56_FRAME_CURRENT];
575 int remaining_buf_size = avpkt->size;
576 int alpha_offset = remaining_buf_size;
581 if (remaining_buf_size < 3)
582 return AVERROR_INVALIDDATA;
583 alpha_offset = bytestream_get_be24(&buf);
584 remaining_buf_size -= 3;
585 if (remaining_buf_size < alpha_offset)
586 return AVERROR_INVALIDDATA;
589 res = s->parse_header(s, buf, alpha_offset);
593 if (res == VP56_SIZE_CHANGE) {
594 for (i = 0; i < 4; i++) {
595 av_frame_unref(s->frames[i]);
596 if (s->alpha_context)
597 av_frame_unref(s->alpha_context->frames[i]);
599 s->frames[VP56_FRAME_CURRENT]->flags |= AV_FRAME_FLAG_KEY; //FIXME
602 ret = ff_get_buffer(avctx, p, AV_GET_BUFFER_FLAG_REF);
604 if (res == VP56_SIZE_CHANGE)
605 ff_set_dimensions(avctx, 0, 0);
609 if (avctx->pix_fmt == AV_PIX_FMT_YUVA420P) {
610 if ((ret = av_frame_replace(s->alpha_context->frames[VP56_FRAME_CURRENT], p)) < 0) {
612 if (res == VP56_SIZE_CHANGE)
613 ff_set_dimensions(avctx, 0, 0);
618 if (res == VP56_SIZE_CHANGE) {
619 if (vp56_size_changed(s)) {
621 return AVERROR_INVALIDDATA;
625 if (avctx->pix_fmt == AV_PIX_FMT_YUVA420P) {
626 int bak_w = avctx->width;
627 int bak_h = avctx->height;
628 int bak_cw = avctx->coded_width;
629 int bak_ch = avctx->coded_height;
631 remaining_buf_size -= alpha_offset;
633 res = s->alpha_context->parse_header(s->alpha_context, buf, remaining_buf_size);
635 if(res==VP56_SIZE_CHANGE) {
636 av_log(avctx, AV_LOG_ERROR, "Alpha reconfiguration\n");
637 avctx->width = bak_w;
638 avctx->height = bak_h;
639 avctx->coded_width = bak_cw;
640 avctx->coded_height = bak_ch;
643 return AVERROR_INVALIDDATA;
647 s->discard_frame = 0;
648 avctx->execute2(avctx, ff_vp56_decode_mbs, 0, 0, (avctx->pix_fmt == AV_PIX_FMT_YUVA420P) + 1);
650 if (s->discard_frame)
651 return AVERROR_INVALIDDATA;
653 if ((res = av_frame_ref(rframe, p)) < 0)
660 static int ff_vp56_decode_mbs(AVCodecContext *avctx, void *data,
661 int jobnr, int threadnr)
663 VP56Context *s0 = avctx->priv_data;
664 int is_alpha = (jobnr == 1);
665 VP56Context *s = is_alpha ? s0->alpha_context : s0;
666 AVFrame *const p = s->frames[VP56_FRAME_CURRENT];
667 int mb_row, mb_col, mb_row_flip, mb_offset = 0;
669 ptrdiff_t stride_y, stride_uv;
673 if (p->flags & AV_FRAME_FLAG_KEY) {
674 p->pict_type = AV_PICTURE_TYPE_I;
675 s->default_models_init(s);
676 for (block=0; block<s->mb_height*s->mb_width; block++)
677 s->macroblocks[block].type = VP56_MB_INTRA;
679 p->pict_type = AV_PICTURE_TYPE_P;
680 vp56_parse_mb_type_models(s);
681 s->parse_vector_models(s);
682 s->mb_type = VP56_MB_INTER_NOVEC_PF;
685 if (s->parse_coeff_models(s))
688 memset(s->prev_dc, 0, sizeof(s->prev_dc));
689 s->prev_dc[1][VP56_FRAME_CURRENT] = 128;
690 s->prev_dc[2][VP56_FRAME_CURRENT] = 128;
692 for (block=0; block < 4*s->mb_width+6; block++) {
693 s->above_blocks[block].ref_frame = VP56_FRAME_NONE;
694 s->above_blocks[block].dc_coeff = 0;
695 s->above_blocks[block].not_null_dc = 0;
697 s->above_blocks[2*s->mb_width + 2].ref_frame = VP56_FRAME_CURRENT;
698 s->above_blocks[3*s->mb_width + 4].ref_frame = VP56_FRAME_CURRENT;
700 stride_y = p->linesize[0];
701 stride_uv = p->linesize[1];
706 /* main macroblocks loop */
707 for (mb_row=0; mb_row<s->mb_height; mb_row++) {
709 mb_row_flip = s->mb_height - mb_row - 1;
711 mb_row_flip = mb_row;
713 for (block=0; block<4; block++) {
714 s->left_block[block].ref_frame = VP56_FRAME_NONE;
715 s->left_block[block].dc_coeff = 0;
716 s->left_block[block].not_null_dc = 0;
718 memset(s->coeff_ctx, 0, sizeof(s->coeff_ctx));
719 memset(s->coeff_ctx_last, 24, sizeof(s->coeff_ctx_last));
721 s->above_block_idx[0] = 1;
722 s->above_block_idx[1] = 2;
723 s->above_block_idx[2] = 1;
724 s->above_block_idx[3] = 2;
725 s->above_block_idx[4] = 2*s->mb_width + 2 + 1;
726 s->above_block_idx[5] = 3*s->mb_width + 4 + 1;
728 s->block_offset[s->frbi] = (mb_row_flip*16 + mb_offset) * stride_y;
729 s->block_offset[s->srbi] = s->block_offset[s->frbi] + 8*stride_y;
730 s->block_offset[1] = s->block_offset[0] + 8;
731 s->block_offset[3] = s->block_offset[2] + 8;
732 s->block_offset[4] = (mb_row_flip*8 + mb_offset) * stride_uv;
733 s->block_offset[5] = s->block_offset[4];
735 for (mb_col=0; mb_col<s->mb_width; mb_col++) {
737 int ret = vp56_decode_mb(s, mb_row, mb_col, is_alpha);
740 if (!s->have_undamaged_frame || !avctx->error_concealment) {
741 s->discard_frame = 1;
742 return AVERROR_INVALIDDATA;
747 vp56_conceal_mb(s, mb_row, mb_col, is_alpha);
749 for (y=0; y<4; y++) {
750 s->above_block_idx[y] += 2;
751 s->block_offset[y] += 16;
754 for (uv=4; uv<6; uv++) {
755 s->above_block_idx[uv] += 1;
756 s->block_offset[uv] += 8;
762 s->have_undamaged_frame = 1;
765 if ((p->flags & AV_FRAME_FLAG_KEY) || s->golden_frame) {
766 if ((res = av_frame_replace(s->frames[VP56_FRAME_GOLDEN], p)) < 0)
770 av_frame_unref(s->frames[VP56_FRAME_PREVIOUS]);
771 FFSWAP(AVFrame *, s->frames[VP56_FRAME_CURRENT],
772 s->frames[VP56_FRAME_PREVIOUS]);
776 av_cold int ff_vp56_init_context(AVCodecContext *avctx, VP56Context *s,
777 int flip, int has_alpha)
782 avctx->pix_fmt = has_alpha ? AV_PIX_FMT_YUVA420P : AV_PIX_FMT_YUV420P;
783 if (avctx->skip_alpha) avctx->pix_fmt = AV_PIX_FMT_YUV420P;
785 ff_h264chroma_init(&s->h264chroma, 8);
786 ff_hpeldsp_init(&s->hdsp, avctx->flags);
787 ff_videodsp_init(&s->vdsp, 8);
788 ff_vp3dsp_init(&s->vp3dsp, avctx->flags);
789 for (i = 0; i < 64; i++) {
790 #define TRANSPOSE(x) (((x) >> 3) | (((x) & 7) << 3))
791 s->idct_scantable[i] = TRANSPOSE(ff_zigzag_direct[i]);
795 for (i = 0; i < FF_ARRAY_ELEMS(s->frames); i++) {
796 s->frames[i] = av_frame_alloc();
798 return AVERROR(ENOMEM);
800 s->edge_emu_buffer_alloc = NULL;
802 s->above_blocks = NULL;
803 s->macroblocks = NULL;
805 s->deblock_filtering = 1;
810 s->has_alpha = has_alpha;
812 s->modelp = &s->model;
827 av_cold int ff_vp56_free_context(VP56Context *s)
831 av_freep(&s->above_blocks);
832 av_freep(&s->macroblocks);
833 av_freep(&s->edge_emu_buffer_alloc);
835 for (i = 0; i < FF_ARRAY_ELEMS(s->frames); i++)
836 av_frame_free(&s->frames[i]);