diff options
Diffstat (limited to 'ffmpeg1/libavcodec/vp56.c')
| -rw-r--r-- | ffmpeg1/libavcodec/vp56.c | 755 |
1 files changed, 755 insertions, 0 deletions
diff --git a/ffmpeg1/libavcodec/vp56.c b/ffmpeg1/libavcodec/vp56.c new file mode 100644 index 0000000..6bf391c --- /dev/null +++ b/ffmpeg1/libavcodec/vp56.c @@ -0,0 +1,755 @@ +/* + * 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; +} |