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701 lines
23 KiB
C
701 lines
23 KiB
C
/**
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* @file vp56.c
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* VP5 and VP6 compatible video decoder (common features)
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*
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* Copyright (C) 2006 Aurelien Jacobs <aurel@gnuage.org>
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*
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* This file is part of FFmpeg.
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*
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* FFmpeg is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* FFmpeg is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with FFmpeg; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "avcodec.h"
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#include "bytestream.h"
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#include "vp56.h"
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#include "vp56data.h"
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void vp56_init_dequant(vp56_context_t *s, int quantizer)
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{
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s->quantizer = quantizer;
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s->dequant_dc = vp56_dc_dequant[quantizer] << 2;
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s->dequant_ac = vp56_ac_dequant[quantizer] << 2;
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}
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static int vp56_get_vectors_predictors(vp56_context_t *s, int row, int col,
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vp56_frame_t ref_frame)
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{
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int nb_pred = 0;
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vp56_mv_t vect[2] = {{0,0}, {0,0}};
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int pos, offset;
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vp56_mv_t mvp;
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for (pos=0; pos<12; pos++) {
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mvp.x = col + vp56_candidate_predictor_pos[pos][0];
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mvp.y = row + vp56_candidate_predictor_pos[pos][1];
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if (mvp.x < 0 || mvp.x >= s->mb_width ||
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mvp.y < 0 || mvp.y >= s->mb_height)
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continue;
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offset = mvp.x + s->mb_width*mvp.y;
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if (vp56_reference_frame[s->macroblocks[offset].type] != ref_frame)
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continue;
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if ((s->macroblocks[offset].mv.x == vect[0].x &&
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s->macroblocks[offset].mv.y == vect[0].y) ||
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(s->macroblocks[offset].mv.x == 0 &&
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s->macroblocks[offset].mv.y == 0))
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continue;
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vect[nb_pred++] = s->macroblocks[offset].mv;
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if (nb_pred > 1) {
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nb_pred = -1;
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break;
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}
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s->vector_candidate_pos = pos;
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}
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s->vector_candidate[0] = vect[0];
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s->vector_candidate[1] = vect[1];
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return nb_pred+1;
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}
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static void vp56_parse_mb_type_models(vp56_context_t *s)
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{
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vp56_range_coder_t *c = &s->c;
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vp56_model_t *model = s->modelp;
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int i, ctx, type;
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for (ctx=0; ctx<3; ctx++) {
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if (vp56_rac_get_prob(c, 174)) {
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int idx = vp56_rac_gets(c, 4);
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memcpy(model->mb_types_stats[ctx],
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vp56_pre_def_mb_type_stats[idx][ctx],
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sizeof(model->mb_types_stats[ctx]));
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}
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if (vp56_rac_get_prob(c, 254)) {
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for (type=0; type<10; type++) {
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for(i=0; i<2; i++) {
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if (vp56_rac_get_prob(c, 205)) {
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int delta, sign = vp56_rac_get(c);
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delta = vp56_rac_get_tree(c, vp56_pmbtm_tree,
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vp56_mb_type_model_model);
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if (!delta)
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delta = 4 * vp56_rac_gets(c, 7);
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model->mb_types_stats[ctx][type][i] += (delta ^ -sign) + sign;
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}
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}
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}
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}
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}
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/* compute MB type probability tables based on previous MB type */
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for (ctx=0; ctx<3; ctx++) {
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int p[10];
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for (type=0; type<10; type++)
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p[type] = 100 * model->mb_types_stats[ctx][type][1];
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for (type=0; type<10; type++) {
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int p02, p34, p0234, p17, p56, p89, p5689, p156789;
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/* conservative MB type probability */
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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]);
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p[type] = 0; /* same MB type => weight is null */
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/* binary tree parsing probabilities */
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p02 = p[0] + p[2];
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p34 = p[3] + p[4];
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p0234 = p02 + p34;
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p17 = p[1] + p[7];
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p56 = p[5] + p[6];
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p89 = p[8] + p[9];
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p5689 = p56 + p89;
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p156789 = p17 + p5689;
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model->mb_type[ctx][type][1] = 1 + 255 * p0234/(1+p0234+p156789);
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model->mb_type[ctx][type][2] = 1 + 255 * p02 / (1+p0234);
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model->mb_type[ctx][type][3] = 1 + 255 * p17 / (1+p156789);
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model->mb_type[ctx][type][4] = 1 + 255 * p[0] / (1+p02);
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model->mb_type[ctx][type][5] = 1 + 255 * p[3] / (1+p34);
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model->mb_type[ctx][type][6] = 1 + 255 * p[1] / (1+p17);
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model->mb_type[ctx][type][7] = 1 + 255 * p56 / (1+p5689);
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model->mb_type[ctx][type][8] = 1 + 255 * p[5] / (1+p56);
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model->mb_type[ctx][type][9] = 1 + 255 * p[8] / (1+p89);
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/* restore initial value */
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p[type] = 100 * model->mb_types_stats[ctx][type][1];
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}
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}
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}
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static vp56_mb_t vp56_parse_mb_type(vp56_context_t *s,
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vp56_mb_t prev_type, int ctx)
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{
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uint8_t *mb_type_model = s->modelp->mb_type[ctx][prev_type];
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vp56_range_coder_t *c = &s->c;
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if (vp56_rac_get_prob(c, mb_type_model[0]))
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return prev_type;
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else
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return vp56_rac_get_tree(c, vp56_pmbt_tree, mb_type_model);
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}
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static void vp56_decode_4mv(vp56_context_t *s, int row, int col)
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{
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vp56_mv_t mv = {0,0};
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int type[4];
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int b;
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/* parse each block type */
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for (b=0; b<4; b++) {
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type[b] = vp56_rac_gets(&s->c, 2);
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if (type[b])
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type[b]++; /* only returns 0, 2, 3 or 4 (all INTER_PF) */
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}
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/* get vectors */
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for (b=0; b<4; b++) {
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switch (type[b]) {
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case VP56_MB_INTER_NOVEC_PF:
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s->mv[b] = (vp56_mv_t) {0,0};
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break;
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case VP56_MB_INTER_DELTA_PF:
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s->parse_vector_adjustment(s, &s->mv[b]);
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break;
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case VP56_MB_INTER_V1_PF:
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s->mv[b] = s->vector_candidate[0];
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break;
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case VP56_MB_INTER_V2_PF:
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s->mv[b] = s->vector_candidate[1];
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break;
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}
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mv.x += s->mv[b].x;
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mv.y += s->mv[b].y;
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}
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/* this is the one selected for the whole MB for prediction */
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s->macroblocks[row * s->mb_width + col].mv = s->mv[3];
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/* chroma vectors are average luma vectors */
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if (s->avctx->codec->id == CODEC_ID_VP5) {
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s->mv[4].x = s->mv[5].x = RSHIFT(mv.x,2);
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s->mv[4].y = s->mv[5].y = RSHIFT(mv.y,2);
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} else {
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s->mv[4] = s->mv[5] = (vp56_mv_t) {mv.x/4, mv.y/4};
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}
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}
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static vp56_mb_t vp56_decode_mv(vp56_context_t *s, int row, int col)
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{
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vp56_mv_t *mv, vect = {0,0};
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int ctx, b;
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ctx = vp56_get_vectors_predictors(s, row, col, VP56_FRAME_PREVIOUS);
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s->mb_type = vp56_parse_mb_type(s, s->mb_type, ctx);
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s->macroblocks[row * s->mb_width + col].type = s->mb_type;
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switch (s->mb_type) {
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case VP56_MB_INTER_V1_PF:
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mv = &s->vector_candidate[0];
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break;
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case VP56_MB_INTER_V2_PF:
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mv = &s->vector_candidate[1];
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break;
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case VP56_MB_INTER_V1_GF:
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vp56_get_vectors_predictors(s, row, col, VP56_FRAME_GOLDEN);
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mv = &s->vector_candidate[0];
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break;
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case VP56_MB_INTER_V2_GF:
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vp56_get_vectors_predictors(s, row, col, VP56_FRAME_GOLDEN);
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mv = &s->vector_candidate[1];
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break;
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case VP56_MB_INTER_DELTA_PF:
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s->parse_vector_adjustment(s, &vect);
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mv = &vect;
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break;
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case VP56_MB_INTER_DELTA_GF:
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vp56_get_vectors_predictors(s, row, col, VP56_FRAME_GOLDEN);
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s->parse_vector_adjustment(s, &vect);
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mv = &vect;
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break;
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case VP56_MB_INTER_4V:
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vp56_decode_4mv(s, row, col);
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return s->mb_type;
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default:
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mv = &vect;
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break;
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}
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s->macroblocks[row*s->mb_width + col].mv = *mv;
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/* same vector for all blocks */
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for (b=0; b<6; b++)
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s->mv[b] = *mv;
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return s->mb_type;
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}
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static void vp56_add_predictors_dc(vp56_context_t *s, vp56_frame_t ref_frame)
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{
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int idx = s->scantable.permutated[0];
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int b;
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for (b=0; b<6; b++) {
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vp56_ref_dc_t *ab = &s->above_blocks[s->above_block_idx[b]];
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vp56_ref_dc_t *lb = &s->left_block[vp56_b6to4[b]];
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int count = 0;
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int dc = 0;
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int i;
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if (ref_frame == lb->ref_frame) {
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dc += lb->dc_coeff;
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count++;
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}
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if (ref_frame == ab->ref_frame) {
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dc += ab->dc_coeff;
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count++;
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}
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if (s->avctx->codec->id == CODEC_ID_VP5)
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for (i=0; i<2; i++)
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if (count < 2 && ref_frame == ab[-1+2*i].ref_frame) {
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dc += ab[-1+2*i].dc_coeff;
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count++;
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}
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if (count == 0)
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dc = s->prev_dc[vp56_b2p[b]][ref_frame];
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else if (count == 2)
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dc /= 2;
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s->block_coeff[b][idx] += dc;
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s->prev_dc[vp56_b2p[b]][ref_frame] = s->block_coeff[b][idx];
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ab->dc_coeff = s->block_coeff[b][idx];
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ab->ref_frame = ref_frame;
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lb->dc_coeff = s->block_coeff[b][idx];
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lb->ref_frame = ref_frame;
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s->block_coeff[b][idx] *= s->dequant_dc;
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}
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}
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static void vp56_edge_filter(vp56_context_t *s, uint8_t *yuv,
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int pix_inc, int line_inc, int t)
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{
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int pix2_inc = 2 * pix_inc;
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int i, v;
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for (i=0; i<12; i++) {
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v = (yuv[-pix2_inc] + 3*(yuv[0]-yuv[-pix_inc]) - yuv[pix_inc] + 4) >>3;
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v = s->adjust(v, t);
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yuv[-pix_inc] = av_clip_uint8(yuv[-pix_inc] + v);
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yuv[0] = av_clip_uint8(yuv[0] - v);
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yuv += line_inc;
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}
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}
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static void vp56_deblock_filter(vp56_context_t *s, uint8_t *yuv,
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int stride, int dx, int dy)
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{
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int t = vp56_filter_threshold[s->quantizer];
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if (dx) vp56_edge_filter(s, yuv + 10-dx , 1, stride, t);
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if (dy) vp56_edge_filter(s, yuv + stride*(10-dy), stride, 1, t);
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}
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static void vp56_mc(vp56_context_t *s, int b, int plane, uint8_t *src,
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int stride, int x, int y)
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{
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uint8_t *dst=s->framep[VP56_FRAME_CURRENT]->data[plane]+s->block_offset[b];
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uint8_t *src_block;
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int src_offset;
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int overlap_offset = 0;
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int mask = s->vp56_coord_div[b] - 1;
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int deblock_filtering = s->deblock_filtering;
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int dx;
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int dy;
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if (s->avctx->skip_loop_filter >= AVDISCARD_ALL ||
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(s->avctx->skip_loop_filter >= AVDISCARD_NONKEY
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&& !s->framep[VP56_FRAME_CURRENT]->key_frame))
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deblock_filtering = 0;
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dx = s->mv[b].x / s->vp56_coord_div[b];
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dy = s->mv[b].y / s->vp56_coord_div[b];
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if (b >= 4) {
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x /= 2;
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y /= 2;
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}
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x += dx - 2;
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y += dy - 2;
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if (x<0 || x+12>=s->plane_width[plane] ||
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y<0 || y+12>=s->plane_height[plane]) {
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ff_emulated_edge_mc(s->edge_emu_buffer,
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src + s->block_offset[b] + (dy-2)*stride + (dx-2),
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stride, 12, 12, x, y,
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s->plane_width[plane],
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s->plane_height[plane]);
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src_block = s->edge_emu_buffer;
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src_offset = 2 + 2*stride;
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} else if (deblock_filtering) {
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/* only need a 12x12 block, but there is no such dsp function, */
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/* so copy a 16x12 block */
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s->dsp.put_pixels_tab[0][0](s->edge_emu_buffer,
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src + s->block_offset[b] + (dy-2)*stride + (dx-2),
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stride, 12);
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src_block = s->edge_emu_buffer;
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src_offset = 2 + 2*stride;
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} else {
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src_block = src;
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src_offset = s->block_offset[b] + dy*stride + dx;
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}
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if (deblock_filtering)
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vp56_deblock_filter(s, src_block, stride, dx&7, dy&7);
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if (s->mv[b].x & mask)
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overlap_offset += (s->mv[b].x > 0) ? 1 : -1;
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if (s->mv[b].y & mask)
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overlap_offset += (s->mv[b].y > 0) ? stride : -stride;
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if (overlap_offset) {
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if (s->filter)
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s->filter(s, dst, src_block, src_offset, src_offset+overlap_offset,
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stride, s->mv[b], mask, s->filter_selection, b<4);
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else
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s->dsp.put_no_rnd_pixels_l2[1](dst, src_block+src_offset,
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src_block+src_offset+overlap_offset,
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stride, 8);
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} else {
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s->dsp.put_pixels_tab[1][0](dst, src_block+src_offset, stride, 8);
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}
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}
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static void vp56_decode_mb(vp56_context_t *s, int row, int col, int is_alpha)
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{
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AVFrame *frame_current, *frame_ref;
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vp56_mb_t mb_type;
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vp56_frame_t ref_frame;
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int b, ab, b_max, plane, off;
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if (s->framep[VP56_FRAME_CURRENT]->key_frame)
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mb_type = VP56_MB_INTRA;
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else
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mb_type = vp56_decode_mv(s, row, col);
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ref_frame = vp56_reference_frame[mb_type];
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memset(s->block_coeff, 0, sizeof(s->block_coeff));
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s->parse_coeff(s);
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vp56_add_predictors_dc(s, ref_frame);
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frame_current = s->framep[VP56_FRAME_CURRENT];
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frame_ref = s->framep[ref_frame];
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ab = 6*is_alpha;
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b_max = 6 - 2*is_alpha;
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switch (mb_type) {
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case VP56_MB_INTRA:
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for (b=0; b<b_max; b++) {
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plane = vp56_b2p[b+ab];
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s->dsp.idct_put(frame_current->data[plane] + s->block_offset[b],
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s->stride[plane], s->block_coeff[b]);
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}
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break;
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case VP56_MB_INTER_NOVEC_PF:
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case VP56_MB_INTER_NOVEC_GF:
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for (b=0; b<b_max; b++) {
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plane = vp56_b2p[b+ab];
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off = s->block_offset[b];
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s->dsp.put_pixels_tab[1][0](frame_current->data[plane] + off,
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frame_ref->data[plane] + off,
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s->stride[plane], 8);
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s->dsp.idct_add(frame_current->data[plane] + off,
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s->stride[plane], s->block_coeff[b]);
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}
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break;
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case VP56_MB_INTER_DELTA_PF:
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case VP56_MB_INTER_V1_PF:
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case VP56_MB_INTER_V2_PF:
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case VP56_MB_INTER_DELTA_GF:
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case VP56_MB_INTER_4V:
|
|
case VP56_MB_INTER_V1_GF:
|
|
case VP56_MB_INTER_V2_GF:
|
|
for (b=0; b<b_max; b++) {
|
|
int x_off = b==1 || b==3 ? 8 : 0;
|
|
int y_off = b==2 || b==3 ? 8 : 0;
|
|
plane = vp56_b2p[b+ab];
|
|
vp56_mc(s, b, plane, frame_ref->data[plane], s->stride[plane],
|
|
16*col+x_off, 16*row+y_off);
|
|
s->dsp.idct_add(frame_current->data[plane] + s->block_offset[b],
|
|
s->stride[plane], s->block_coeff[b]);
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
|
|
static int vp56_size_changed(AVCodecContext *avctx)
|
|
{
|
|
vp56_context_t *s = avctx->priv_data;
|
|
int stride = s->framep[VP56_FRAME_CURRENT]->linesize[0];
|
|
int i;
|
|
|
|
s->plane_width[0] = s->plane_width[3] = avctx->coded_width;
|
|
s->plane_width[1] = s->plane_width[2] = avctx->coded_width/2;
|
|
s->plane_height[0] = s->plane_height[3] = avctx->coded_height;
|
|
s->plane_height[1] = s->plane_height[2] = avctx->coded_height/2;
|
|
|
|
for (i=0; i<4; i++)
|
|
s->stride[i] = s->flip * s->framep[VP56_FRAME_CURRENT]->linesize[i];
|
|
|
|
s->mb_width = (avctx->coded_width +15) / 16;
|
|
s->mb_height = (avctx->coded_height+15) / 16;
|
|
|
|
if (s->mb_width > 1000 || s->mb_height > 1000) {
|
|
av_log(avctx, AV_LOG_ERROR, "picture too big\n");
|
|
return -1;
|
|
}
|
|
|
|
s->above_blocks = av_realloc(s->above_blocks,
|
|
(4*s->mb_width+6) * sizeof(*s->above_blocks));
|
|
s->macroblocks = av_realloc(s->macroblocks,
|
|
s->mb_width*s->mb_height*sizeof(*s->macroblocks));
|
|
av_free(s->edge_emu_buffer_alloc);
|
|
s->edge_emu_buffer_alloc = av_malloc(16*stride);
|
|
s->edge_emu_buffer = s->edge_emu_buffer_alloc;
|
|
if (s->flip < 0)
|
|
s->edge_emu_buffer += 15 * stride;
|
|
|
|
return 0;
|
|
}
|
|
|
|
int vp56_decode_frame(AVCodecContext *avctx, void *data, int *data_size,
|
|
const uint8_t *buf, int buf_size)
|
|
{
|
|
vp56_context_t *s = avctx->priv_data;
|
|
AVFrame *const p = s->framep[VP56_FRAME_CURRENT];
|
|
int is_alpha, alpha_offset;
|
|
|
|
if (s->has_alpha) {
|
|
alpha_offset = bytestream_get_be24(&buf);
|
|
buf_size -= 3;
|
|
}
|
|
|
|
for (is_alpha=0; is_alpha < 1+s->has_alpha; is_alpha++) {
|
|
int mb_row, mb_col, mb_row_flip, mb_offset = 0;
|
|
int block, y, uv, stride_y, stride_uv;
|
|
int golden_frame = 0;
|
|
int res;
|
|
|
|
s->modelp = &s->models[is_alpha];
|
|
|
|
res = s->parse_header(s, buf, buf_size, &golden_frame);
|
|
if (!res)
|
|
return -1;
|
|
|
|
if (!is_alpha) {
|
|
p->reference = 1;
|
|
if (avctx->get_buffer(avctx, p) < 0) {
|
|
av_log(avctx, AV_LOG_ERROR, "get_buffer() failed\n");
|
|
return -1;
|
|
}
|
|
|
|
if (res == 2)
|
|
if (vp56_size_changed(avctx)) {
|
|
avctx->release_buffer(avctx, p);
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
if (p->key_frame) {
|
|
p->pict_type = FF_I_TYPE;
|
|
s->default_models_init(s);
|
|
for (block=0; block<s->mb_height*s->mb_width; block++)
|
|
s->macroblocks[block].type = VP56_MB_INTRA;
|
|
} else {
|
|
p->pict_type = FF_P_TYPE;
|
|
vp56_parse_mb_type_models(s);
|
|
s->parse_vector_models(s);
|
|
s->mb_type = VP56_MB_INTER_NOVEC_PF;
|
|
}
|
|
|
|
s->parse_coeff_models(s);
|
|
|
|
memset(s->prev_dc, 0, sizeof(s->prev_dc));
|
|
s->prev_dc[1][VP56_FRAME_CURRENT] = 128;
|
|
s->prev_dc[2][VP56_FRAME_CURRENT] = 128;
|
|
|
|
for (block=0; block < 4*s->mb_width+6; block++) {
|
|
s->above_blocks[block].ref_frame = -1;
|
|
s->above_blocks[block].dc_coeff = 0;
|
|
s->above_blocks[block].not_null_dc = 0;
|
|
}
|
|
s->above_blocks[2*s->mb_width + 2].ref_frame = 0;
|
|
s->above_blocks[3*s->mb_width + 4].ref_frame = 0;
|
|
|
|
stride_y = p->linesize[0];
|
|
stride_uv = p->linesize[1];
|
|
|
|
if (s->flip < 0)
|
|
mb_offset = 7;
|
|
|
|
/* main macroblocks loop */
|
|
for (mb_row=0; mb_row<s->mb_height; mb_row++) {
|
|
if (s->flip < 0)
|
|
mb_row_flip = s->mb_height - mb_row - 1;
|
|
else
|
|
mb_row_flip = mb_row;
|
|
|
|
for (block=0; block<4; block++) {
|
|
s->left_block[block].ref_frame = -1;
|
|
s->left_block[block].dc_coeff = 0;
|
|
s->left_block[block].not_null_dc = 0;
|
|
}
|
|
memset(s->coeff_ctx, 0, sizeof(s->coeff_ctx));
|
|
memset(s->coeff_ctx_last, 24, sizeof(s->coeff_ctx_last));
|
|
|
|
s->above_block_idx[0] = 1;
|
|
s->above_block_idx[1] = 2;
|
|
s->above_block_idx[2] = 1;
|
|
s->above_block_idx[3] = 2;
|
|
s->above_block_idx[4] = 2*s->mb_width + 2 + 1;
|
|
s->above_block_idx[5] = 3*s->mb_width + 4 + 1;
|
|
|
|
s->block_offset[s->frbi] = (mb_row_flip*16 + mb_offset) * stride_y;
|
|
s->block_offset[s->srbi] = s->block_offset[s->frbi] + 8*stride_y;
|
|
s->block_offset[1] = s->block_offset[0] + 8;
|
|
s->block_offset[3] = s->block_offset[2] + 8;
|
|
s->block_offset[4] = (mb_row_flip*8 + mb_offset) * stride_uv;
|
|
s->block_offset[5] = s->block_offset[4];
|
|
|
|
for (mb_col=0; mb_col<s->mb_width; mb_col++) {
|
|
vp56_decode_mb(s, mb_row, mb_col, is_alpha);
|
|
|
|
for (y=0; y<4; y++) {
|
|
s->above_block_idx[y] += 2;
|
|
s->block_offset[y] += 16;
|
|
}
|
|
|
|
for (uv=4; uv<6; uv++) {
|
|
s->above_block_idx[uv] += 1;
|
|
s->block_offset[uv] += 8;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (p->key_frame || golden_frame) {
|
|
if (s->framep[VP56_FRAME_GOLDEN]->data[0] &&
|
|
s->framep[VP56_FRAME_GOLDEN] != s->framep[VP56_FRAME_GOLDEN2])
|
|
avctx->release_buffer(avctx, s->framep[VP56_FRAME_GOLDEN]);
|
|
s->framep[VP56_FRAME_GOLDEN] = p;
|
|
}
|
|
|
|
if (s->has_alpha) {
|
|
FFSWAP(AVFrame *, s->framep[VP56_FRAME_GOLDEN],
|
|
s->framep[VP56_FRAME_GOLDEN2]);
|
|
buf += alpha_offset;
|
|
buf_size -= alpha_offset;
|
|
}
|
|
}
|
|
|
|
if (s->framep[VP56_FRAME_PREVIOUS] == s->framep[VP56_FRAME_GOLDEN] ||
|
|
s->framep[VP56_FRAME_PREVIOUS] == s->framep[VP56_FRAME_GOLDEN2]) {
|
|
if (s->framep[VP56_FRAME_UNUSED] != s->framep[VP56_FRAME_GOLDEN] &&
|
|
s->framep[VP56_FRAME_UNUSED] != s->framep[VP56_FRAME_GOLDEN2])
|
|
FFSWAP(AVFrame *, s->framep[VP56_FRAME_PREVIOUS],
|
|
s->framep[VP56_FRAME_UNUSED]);
|
|
else
|
|
FFSWAP(AVFrame *, s->framep[VP56_FRAME_PREVIOUS],
|
|
s->framep[VP56_FRAME_UNUSED2]);
|
|
} else if (s->framep[VP56_FRAME_PREVIOUS]->data[0])
|
|
avctx->release_buffer(avctx, s->framep[VP56_FRAME_PREVIOUS]);
|
|
FFSWAP(AVFrame *, s->framep[VP56_FRAME_CURRENT],
|
|
s->framep[VP56_FRAME_PREVIOUS]);
|
|
|
|
*(AVFrame*)data = *p;
|
|
*data_size = sizeof(AVFrame);
|
|
|
|
return buf_size;
|
|
}
|
|
|
|
av_cold void vp56_init(AVCodecContext *avctx, int flip, int has_alpha)
|
|
{
|
|
vp56_context_t *s = avctx->priv_data;
|
|
int i;
|
|
|
|
s->avctx = avctx;
|
|
avctx->pix_fmt = has_alpha ? PIX_FMT_YUVA420P : PIX_FMT_YUV420P;
|
|
|
|
if (avctx->idct_algo == FF_IDCT_AUTO)
|
|
avctx->idct_algo = FF_IDCT_VP3;
|
|
dsputil_init(&s->dsp, avctx);
|
|
ff_init_scantable(s->dsp.idct_permutation, &s->scantable,ff_zigzag_direct);
|
|
|
|
avcodec_set_dimensions(avctx, 0, 0);
|
|
|
|
for (i=0; i<4; i++)
|
|
s->framep[i] = &s->frames[i];
|
|
s->framep[VP56_FRAME_UNUSED] = s->framep[VP56_FRAME_GOLDEN];
|
|
s->framep[VP56_FRAME_UNUSED2] = s->framep[VP56_FRAME_GOLDEN2];
|
|
s->edge_emu_buffer_alloc = NULL;
|
|
|
|
s->above_blocks = NULL;
|
|
s->macroblocks = NULL;
|
|
s->quantizer = -1;
|
|
s->deblock_filtering = 1;
|
|
|
|
s->filter = NULL;
|
|
|
|
s->has_alpha = has_alpha;
|
|
if (flip) {
|
|
s->flip = -1;
|
|
s->frbi = 2;
|
|
s->srbi = 0;
|
|
} else {
|
|
s->flip = 1;
|
|
s->frbi = 0;
|
|
s->srbi = 2;
|
|
}
|
|
}
|
|
|
|
av_cold int vp56_free(AVCodecContext *avctx)
|
|
{
|
|
vp56_context_t *s = avctx->priv_data;
|
|
|
|
av_free(s->above_blocks);
|
|
av_free(s->macroblocks);
|
|
av_free(s->edge_emu_buffer_alloc);
|
|
if (s->framep[VP56_FRAME_GOLDEN]->data[0])
|
|
avctx->release_buffer(avctx, s->framep[VP56_FRAME_GOLDEN]);
|
|
if (s->framep[VP56_FRAME_GOLDEN2]->data[0])
|
|
avctx->release_buffer(avctx, s->framep[VP56_FRAME_GOLDEN2]);
|
|
if (s->framep[VP56_FRAME_PREVIOUS]->data[0])
|
|
avctx->release_buffer(avctx, s->framep[VP56_FRAME_PREVIOUS]);
|
|
return 0;
|
|
}
|