diff options
Diffstat (limited to 'ffmpeg1/libavcodec/vp56.c')
| -rw-r--r-- | ffmpeg1/libavcodec/vp56.c | 755 |
1 files changed, 0 insertions, 755 deletions
diff --git a/ffmpeg1/libavcodec/vp56.c b/ffmpeg1/libavcodec/vp56.c deleted file mode 100644 index 6bf391c..0000000 --- a/ffmpeg1/libavcodec/vp56.c +++ /dev/null @@ -1,755 +0,0 @@ -/* - * Copyright (C) 2006 Aurelien Jacobs <aurel@gnuage.org> - * - * This file is part of FFmpeg. - * - * FFmpeg is free software; you can redistribute it and/or - * modify it under the terms of the GNU Lesser General Public - * License as published by the Free Software Foundation; either - * version 2.1 of the License, or (at your option) any later version. - * - * FFmpeg is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - * Lesser General Public License for more details. - * - * You should have received a copy of the GNU Lesser General Public - * License along with FFmpeg; if not, write to the Free Software - * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA - */ - -/** - * @file - * VP5 and VP6 compatible video decoder (common features) - */ - -#include "avcodec.h" -#include "bytestream.h" -#include "internal.h" -#include "h264chroma.h" -#include "vp56.h" -#include "vp56data.h" - - -void ff_vp56_init_dequant(VP56Context *s, int quantizer) -{ - s->quantizer = quantizer; - s->dequant_dc = vp56_dc_dequant[quantizer] << 2; - s->dequant_ac = vp56_ac_dequant[quantizer] << 2; -} - -static int vp56_get_vectors_predictors(VP56Context *s, int row, int col, - VP56Frame ref_frame) -{ - int nb_pred = 0; - VP56mv vect[2] = {{0,0}, {0,0}}; - int pos, offset; - VP56mv mvp; - - for (pos=0; pos<12; pos++) { - mvp.x = col + vp56_candidate_predictor_pos[pos][0]; - mvp.y = row + vp56_candidate_predictor_pos[pos][1]; - if (mvp.x < 0 || mvp.x >= s->mb_width || - mvp.y < 0 || mvp.y >= s->mb_height) - continue; - offset = mvp.x + s->mb_width*mvp.y; - - if (vp56_reference_frame[s->macroblocks[offset].type] != ref_frame) - continue; - if ((s->macroblocks[offset].mv.x == vect[0].x && - s->macroblocks[offset].mv.y == vect[0].y) || - (s->macroblocks[offset].mv.x == 0 && - s->macroblocks[offset].mv.y == 0)) - continue; - - vect[nb_pred++] = s->macroblocks[offset].mv; - if (nb_pred > 1) { - nb_pred = -1; - break; - } - s->vector_candidate_pos = pos; - } - - s->vector_candidate[0] = vect[0]; - s->vector_candidate[1] = vect[1]; - - return nb_pred+1; -} - -static void vp56_parse_mb_type_models(VP56Context *s) -{ - VP56RangeCoder *c = &s->c; - VP56Model *model = s->modelp; - int i, ctx, type; - - for (ctx=0; ctx<3; ctx++) { - if (vp56_rac_get_prob(c, 174)) { - int idx = vp56_rac_gets(c, 4); - memcpy(model->mb_types_stats[ctx], - vp56_pre_def_mb_type_stats[idx][ctx], - sizeof(model->mb_types_stats[ctx])); - } - if (vp56_rac_get_prob(c, 254)) { - for (type=0; type<10; type++) { - for(i=0; i<2; i++) { - if (vp56_rac_get_prob(c, 205)) { - int delta, sign = vp56_rac_get(c); - - delta = vp56_rac_get_tree(c, vp56_pmbtm_tree, - vp56_mb_type_model_model); - if (!delta) - delta = 4 * vp56_rac_gets(c, 7); - model->mb_types_stats[ctx][type][i] += (delta ^ -sign) + sign; - } - } - } - } - } - - /* compute MB type probability tables based on previous MB type */ - for (ctx=0; ctx<3; ctx++) { - int p[10]; - - for (type=0; type<10; type++) - p[type] = 100 * model->mb_types_stats[ctx][type][1]; - - for (type=0; type<10; type++) { - int p02, p34, p0234, p17, p56, p89, p5689, p156789; - - /* conservative MB type probability */ - 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]); - - p[type] = 0; /* same MB type => weight is null */ - - /* binary tree parsing probabilities */ - p02 = p[0] + p[2]; - p34 = p[3] + p[4]; - p0234 = p02 + p34; - p17 = p[1] + p[7]; - p56 = p[5] + p[6]; - p89 = p[8] + p[9]; - p5689 = p56 + p89; - p156789 = p17 + p5689; - - model->mb_type[ctx][type][1] = 1 + 255 * p0234/(1+p0234+p156789); - model->mb_type[ctx][type][2] = 1 + 255 * p02 / (1+p0234); - model->mb_type[ctx][type][3] = 1 + 255 * p17 / (1+p156789); - model->mb_type[ctx][type][4] = 1 + 255 * p[0] / (1+p02); - model->mb_type[ctx][type][5] = 1 + 255 * p[3] / (1+p34); - model->mb_type[ctx][type][6] = 1 + 255 * p[1] / (1+p17); - model->mb_type[ctx][type][7] = 1 + 255 * p56 / (1+p5689); - model->mb_type[ctx][type][8] = 1 + 255 * p[5] / (1+p56); - model->mb_type[ctx][type][9] = 1 + 255 * p[8] / (1+p89); - - /* restore initial value */ - p[type] = 100 * model->mb_types_stats[ctx][type][1]; - } - } -} - -static VP56mb vp56_parse_mb_type(VP56Context *s, - VP56mb prev_type, int ctx) -{ - uint8_t *mb_type_model = s->modelp->mb_type[ctx][prev_type]; - VP56RangeCoder *c = &s->c; - - if (vp56_rac_get_prob(c, mb_type_model[0])) - return prev_type; - else - return vp56_rac_get_tree(c, vp56_pmbt_tree, mb_type_model); -} - -static void vp56_decode_4mv(VP56Context *s, int row, int col) -{ - VP56mv mv = {0,0}; - int type[4]; - int b; - - /* parse each block type */ - for (b=0; b<4; b++) { - type[b] = vp56_rac_gets(&s->c, 2); - if (type[b]) - type[b]++; /* only returns 0, 2, 3 or 4 (all INTER_PF) */ - } - - /* get vectors */ - for (b=0; b<4; b++) { - switch (type[b]) { - case VP56_MB_INTER_NOVEC_PF: - s->mv[b] = (VP56mv) {0,0}; - break; - case VP56_MB_INTER_DELTA_PF: - s->parse_vector_adjustment(s, &s->mv[b]); - break; - case VP56_MB_INTER_V1_PF: - s->mv[b] = s->vector_candidate[0]; - break; - case VP56_MB_INTER_V2_PF: - s->mv[b] = s->vector_candidate[1]; - break; - } - mv.x += s->mv[b].x; - mv.y += s->mv[b].y; - } - - /* this is the one selected for the whole MB for prediction */ - s->macroblocks[row * s->mb_width + col].mv = s->mv[3]; - - /* chroma vectors are average luma vectors */ - if (s->avctx->codec->id == AV_CODEC_ID_VP5) { - s->mv[4].x = s->mv[5].x = RSHIFT(mv.x,2); - s->mv[4].y = s->mv[5].y = RSHIFT(mv.y,2); - } else { - s->mv[4] = s->mv[5] = (VP56mv) {mv.x/4, mv.y/4}; - } -} - -static VP56mb vp56_decode_mv(VP56Context *s, int row, int col) -{ - VP56mv *mv, vect = {0,0}; - int ctx, b; - - ctx = vp56_get_vectors_predictors(s, row, col, VP56_FRAME_PREVIOUS); - s->mb_type = vp56_parse_mb_type(s, s->mb_type, ctx); - s->macroblocks[row * s->mb_width + col].type = s->mb_type; - - switch (s->mb_type) { - case VP56_MB_INTER_V1_PF: - mv = &s->vector_candidate[0]; - break; - - case VP56_MB_INTER_V2_PF: - mv = &s->vector_candidate[1]; - break; - - case VP56_MB_INTER_V1_GF: - vp56_get_vectors_predictors(s, row, col, VP56_FRAME_GOLDEN); - mv = &s->vector_candidate[0]; - break; - - case VP56_MB_INTER_V2_GF: - vp56_get_vectors_predictors(s, row, col, VP56_FRAME_GOLDEN); - mv = &s->vector_candidate[1]; - break; - - case VP56_MB_INTER_DELTA_PF: - s->parse_vector_adjustment(s, &vect); - mv = &vect; - break; - - case VP56_MB_INTER_DELTA_GF: - vp56_get_vectors_predictors(s, row, col, VP56_FRAME_GOLDEN); - s->parse_vector_adjustment(s, &vect); - mv = &vect; - break; - - case VP56_MB_INTER_4V: - vp56_decode_4mv(s, row, col); - return s->mb_type; - - default: - mv = &vect; - break; - } - - s->macroblocks[row*s->mb_width + col].mv = *mv; - - /* same vector for all blocks */ - for (b=0; b<6; b++) - s->mv[b] = *mv; - - return s->mb_type; -} - -static void vp56_add_predictors_dc(VP56Context *s, VP56Frame ref_frame) -{ - int idx = s->idct_scantable[0]; - int b; - - for (b=0; b<6; b++) { - VP56RefDc *ab = &s->above_blocks[s->above_block_idx[b]]; - VP56RefDc *lb = &s->left_block[ff_vp56_b6to4[b]]; - int count = 0; - int dc = 0; - int i; - - if (ref_frame == lb->ref_frame) { - dc += lb->dc_coeff; - count++; - } - if (ref_frame == ab->ref_frame) { - dc += ab->dc_coeff; - count++; - } - if (s->avctx->codec->id == AV_CODEC_ID_VP5) - for (i=0; i<2; i++) - if (count < 2 && ref_frame == ab[-1+2*i].ref_frame) { - dc += ab[-1+2*i].dc_coeff; - count++; - } - if (count == 0) - dc = s->prev_dc[ff_vp56_b2p[b]][ref_frame]; - else if (count == 2) - dc /= 2; - - s->block_coeff[b][idx] += dc; - s->prev_dc[ff_vp56_b2p[b]][ref_frame] = s->block_coeff[b][idx]; - ab->dc_coeff = s->block_coeff[b][idx]; - ab->ref_frame = ref_frame; - lb->dc_coeff = s->block_coeff[b][idx]; - lb->ref_frame = ref_frame; - s->block_coeff[b][idx] *= s->dequant_dc; - } -} - -static void vp56_deblock_filter(VP56Context *s, uint8_t *yuv, - int stride, int dx, int dy) -{ - int t = vp56_filter_threshold[s->quantizer]; - if (dx) s->vp56dsp.edge_filter_hor(yuv + 10-dx , stride, t); - if (dy) s->vp56dsp.edge_filter_ver(yuv + stride*(10-dy), stride, t); -} - -static void vp56_mc(VP56Context *s, int b, int plane, uint8_t *src, - int stride, int x, int y) -{ - uint8_t *dst = s->frames[VP56_FRAME_CURRENT]->data[plane] + s->block_offset[b]; - uint8_t *src_block; - int src_offset; - int overlap_offset = 0; - int mask = s->vp56_coord_div[b] - 1; - int deblock_filtering = s->deblock_filtering; - int dx; - int dy; - - if (s->avctx->skip_loop_filter >= AVDISCARD_ALL || - (s->avctx->skip_loop_filter >= AVDISCARD_NONKEY - && !s->frames[VP56_FRAME_CURRENT]->key_frame)) - deblock_filtering = 0; - - dx = s->mv[b].x / s->vp56_coord_div[b]; - dy = s->mv[b].y / s->vp56_coord_div[b]; - - if (b >= 4) { - x /= 2; - y /= 2; - } - x += dx - 2; - y += dy - 2; - - if (x<0 || x+12>=s->plane_width[plane] || - y<0 || y+12>=s->plane_height[plane]) { - s->vdsp.emulated_edge_mc(s->edge_emu_buffer, - src + s->block_offset[b] + (dy-2)*stride + (dx-2), - stride, 12, 12, x, y, - s->plane_width[plane], - s->plane_height[plane]); - src_block = s->edge_emu_buffer; - src_offset = 2 + 2*stride; - } else if (deblock_filtering) { - /* only need a 12x12 block, but there is no such dsp function, */ - /* so copy a 16x12 block */ - s->hdsp.put_pixels_tab[0][0](s->edge_emu_buffer, - src + s->block_offset[b] + (dy-2)*stride + (dx-2), - stride, 12); - src_block = s->edge_emu_buffer; - src_offset = 2 + 2*stride; - } else { - src_block = src; - src_offset = s->block_offset[b] + dy*stride + dx; - } - - if (deblock_filtering) - vp56_deblock_filter(s, src_block, stride, dx&7, dy&7); - - if (s->mv[b].x & mask) - overlap_offset += (s->mv[b].x > 0) ? 1 : -1; - if (s->mv[b].y & mask) - overlap_offset += (s->mv[b].y > 0) ? stride : -stride; - - if (overlap_offset) { - if (s->filter) - s->filter(s, dst, src_block, src_offset, src_offset+overlap_offset, - stride, s->mv[b], mask, s->filter_selection, b<4); - else - s->vp3dsp.put_no_rnd_pixels_l2(dst, src_block+src_offset, - src_block+src_offset+overlap_offset, - stride, 8); - } else { - s->hdsp.put_pixels_tab[1][0](dst, src_block+src_offset, stride, 8); - } -} - -static void vp56_decode_mb(VP56Context *s, int row, int col, int is_alpha) -{ - AVFrame *frame_current, *frame_ref; - VP56mb mb_type; - VP56Frame ref_frame; - int b, ab, b_max, plane, off; - - if (s->frames[VP56_FRAME_CURRENT]->key_frame) - mb_type = VP56_MB_INTRA; - else - mb_type = vp56_decode_mv(s, row, col); - ref_frame = vp56_reference_frame[mb_type]; - - s->parse_coeff(s); - - vp56_add_predictors_dc(s, ref_frame); - - frame_current = s->frames[VP56_FRAME_CURRENT]; - frame_ref = s->frames[ref_frame]; - if (mb_type != VP56_MB_INTRA && !frame_ref->data[0]) - return; - - ab = 6*is_alpha; - b_max = 6 - 2*is_alpha; - - switch (mb_type) { - case VP56_MB_INTRA: - for (b=0; b<b_max; b++) { - plane = ff_vp56_b2p[b+ab]; - s->vp3dsp.idct_put(frame_current->data[plane] + s->block_offset[b], - s->stride[plane], s->block_coeff[b]); - } - break; - - case VP56_MB_INTER_NOVEC_PF: - case VP56_MB_INTER_NOVEC_GF: - for (b=0; b<b_max; b++) { - plane = ff_vp56_b2p[b+ab]; - off = s->block_offset[b]; - s->hdsp.put_pixels_tab[1][0](frame_current->data[plane] + off, - frame_ref->data[plane] + off, - s->stride[plane], 8); - s->vp3dsp.idct_add(frame_current->data[plane] + off, - s->stride[plane], s->block_coeff[b]); - } - break; - - case VP56_MB_INTER_DELTA_PF: - case VP56_MB_INTER_V1_PF: - case VP56_MB_INTER_V2_PF: - case VP56_MB_INTER_DELTA_GF: - 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 = ff_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->vp3dsp.idct_add(frame_current->data[plane] + s->block_offset[b], - s->stride[plane], s->block_coeff[b]); - } - break; - } - - if (is_alpha) { - s->block_coeff[4][0] = 0; - s->block_coeff[5][0] = 0; - } -} - -static int vp56_size_changed(VP56Context *s) -{ - AVCodecContext *avctx = s->avctx; - int stride = s->frames[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->frames[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) { - avcodec_set_dimensions(avctx, 0, 0); - 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; - - if (s->alpha_context) - return vp56_size_changed(s->alpha_context); - - return 0; -} - -static int ff_vp56_decode_mbs(AVCodecContext *avctx, void *, int, int); - -int ff_vp56_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, - AVPacket *avpkt) -{ - const uint8_t *buf = avpkt->data; - VP56Context *s = avctx->priv_data; - AVFrame *const p = s->frames[VP56_FRAME_CURRENT]; - int remaining_buf_size = avpkt->size; - int av_uninit(alpha_offset); - int i, res; - int ret; - - if (s->has_alpha) { - if (remaining_buf_size < 3) - return -1; - alpha_offset = bytestream_get_be24(&buf); - remaining_buf_size -= 3; - if (remaining_buf_size < alpha_offset) - return -1; - } - - res = s->parse_header(s, buf, remaining_buf_size); - if (res < 0) - return res; - - if (res == VP56_SIZE_CHANGE) { - for (i = 0; i < 4; i++) { - av_frame_unref(s->frames[i]); - if (s->alpha_context) - av_frame_unref(s->alpha_context->frames[i]); - } - } - - if (ff_get_buffer(avctx, p, AV_GET_BUFFER_FLAG_REF) < 0) - return -1; - - if (s->has_alpha) { - av_frame_unref(s->alpha_context->frames[VP56_FRAME_CURRENT]); - if ((ret = av_frame_ref(s->alpha_context->frames[VP56_FRAME_CURRENT], p)) < 0) { - av_frame_unref(p); - return ret; - } - } - - if (res == VP56_SIZE_CHANGE) { - if (vp56_size_changed(s)) { - av_frame_unref(p); - return -1; - } - } - - if (s->has_alpha) { - int bak_w = avctx->width; - int bak_h = avctx->height; - int bak_cw = avctx->coded_width; - int bak_ch = avctx->coded_height; - buf += alpha_offset; - remaining_buf_size -= alpha_offset; - - res = s->alpha_context->parse_header(s->alpha_context, buf, remaining_buf_size); - if (res != 0) { - if(res==VP56_SIZE_CHANGE) { - av_log(avctx, AV_LOG_ERROR, "Alpha reconfiguration\n"); - avctx->width = bak_w; - avctx->height = bak_h; - avctx->coded_width = bak_cw; - avctx->coded_height = bak_ch; - } - av_frame_unref(p); - return -1; - } - } - - avctx->execute2(avctx, ff_vp56_decode_mbs, 0, 0, s->has_alpha + 1); - - if ((res = av_frame_ref(data, p)) < 0) - return res; - *got_frame = 1; - - return avpkt->size; -} - -static int ff_vp56_decode_mbs(AVCodecContext *avctx, void *data, - int jobnr, int threadnr) -{ - VP56Context *s0 = avctx->priv_data; - int is_alpha = (jobnr == 1); - VP56Context *s = is_alpha ? s0->alpha_context : s0; - AVFrame *const p = s->frames[VP56_FRAME_CURRENT]; - int mb_row, mb_col, mb_row_flip, mb_offset = 0; - int block, y, uv, stride_y, stride_uv; - int res; - - if (p->key_frame) { - p->pict_type = AV_PICTURE_TYPE_I; - 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 = AV_PICTURE_TYPE_P; - vp56_parse_mb_type_models(s); - s->parse_vector_models(s); - s->mb_type = VP56_MB_INTER_NOVEC_PF; - } - - if (s->parse_coeff_models(s)) - goto next; - - 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 = VP56_FRAME_NONE; - 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 = VP56_FRAME_CURRENT; - s->above_blocks[3*s->mb_width + 4].ref_frame = VP56_FRAME_CURRENT; - - 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 = VP56_FRAME_NONE; - 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; - } - } - } - -next: - if (p->key_frame || s->golden_frame) { - av_frame_unref(s->frames[VP56_FRAME_GOLDEN]); - if ((res = av_frame_ref(s->frames[VP56_FRAME_GOLDEN], p)) < 0) - return res; - } - - av_frame_unref(s->frames[VP56_FRAME_PREVIOUS]); - FFSWAP(AVFrame *, s->frames[VP56_FRAME_CURRENT], - s->frames[VP56_FRAME_PREVIOUS]); - return 0; -} - -av_cold int ff_vp56_init(AVCodecContext *avctx, int flip, int has_alpha) -{ - VP56Context *s = avctx->priv_data; - return ff_vp56_init_context(avctx, s, flip, has_alpha); -} - -av_cold int ff_vp56_init_context(AVCodecContext *avctx, VP56Context *s, - int flip, int has_alpha) -{ - int i; - - s->avctx = avctx; - avctx->pix_fmt = has_alpha ? AV_PIX_FMT_YUVA420P : AV_PIX_FMT_YUV420P; - - ff_h264chroma_init(&s->h264chroma, 8); - ff_hpeldsp_init(&s->hdsp, avctx->flags); - ff_videodsp_init(&s->vdsp, 8); - ff_vp3dsp_init(&s->vp3dsp, avctx->flags); - ff_vp56dsp_init(&s->vp56dsp, avctx->codec->id); - for (i = 0; i < 64; i++) { -#define T(x) (x >> 3) | ((x & 7) << 3) - s->idct_scantable[i] = T(ff_zigzag_direct[i]); -#undef T - } - - for (i = 0; i < FF_ARRAY_ELEMS(s->frames); i++) { - s->frames[i] = av_frame_alloc(); - if (!s->frames[i]) { - ff_vp56_free(avctx); - return AVERROR(ENOMEM); - } - } - s->edge_emu_buffer_alloc = NULL; - - s->above_blocks = NULL; - s->macroblocks = NULL; - s->quantizer = -1; - s->deblock_filtering = 1; - s->golden_frame = 0; - - s->filter = NULL; - - s->has_alpha = has_alpha; - - s->modelp = &s->model; - - if (flip) { - s->flip = -1; - s->frbi = 2; - s->srbi = 0; - } else { - s->flip = 1; - s->frbi = 0; - s->srbi = 2; - } - - return 0; -} - -av_cold int ff_vp56_free(AVCodecContext *avctx) -{ - VP56Context *s = avctx->priv_data; - return ff_vp56_free_context(s); -} - -av_cold int ff_vp56_free_context(VP56Context *s) -{ - int i; - - av_freep(&s->above_blocks); - av_freep(&s->macroblocks); - av_freep(&s->edge_emu_buffer_alloc); - - for (i = 0; i < FF_ARRAY_ELEMS(s->frames); i++) - av_frame_free(&s->frames[i]); - - return 0; -} |