diff options
Diffstat (limited to 'src/libffmpeg/libavcodec/vp56.c')
| -rw-r--r-- | src/libffmpeg/libavcodec/vp56.c | 665 |
1 files changed, 0 insertions, 665 deletions
diff --git a/src/libffmpeg/libavcodec/vp56.c b/src/libffmpeg/libavcodec/vp56.c deleted file mode 100644 index eb78d02e4..000000000 --- a/src/libffmpeg/libavcodec/vp56.c +++ /dev/null @@ -1,665 +0,0 @@ -/** - * @file vp56.c - * VP5 and VP6 compatible video decoder (common features) - * - * 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 St, Fifth Floor, Boston, MA 02110-1301 USA - */ - -#include "avcodec.h" - -#include "vp56.h" -#include "vp56data.h" - - -void vp56_init_dequant(vp56_context_t *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(vp56_context_t *s, int row, int col, - vp56_frame_t ref_frame) -{ - int nb_pred = 0; - vp56_mv_t vect[2] = {{0,0}, {0,0}}; - int pos, offset; - vp56_mv_t 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(vp56_context_t *s) -{ - vp56_range_coder_t *c = &s->c; - 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(s->mb_types_stats[ctx],vp56_pre_def_mb_type_stats[idx][ctx], - sizeof(s->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); - s->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 * s->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 */ - s->mb_type_model[ctx][type][0] = 255 - (255 * s->mb_types_stats[ctx][type][0]) / (1 + s->mb_types_stats[ctx][type][0] + s->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; - - s->mb_type_model[ctx][type][1] = 1 + 255 * p0234/(1+p0234+p156789); - s->mb_type_model[ctx][type][2] = 1 + 255 * p02 / (1+p0234); - s->mb_type_model[ctx][type][3] = 1 + 255 * p17 / (1+p156789); - s->mb_type_model[ctx][type][4] = 1 + 255 * p[0] / (1+p02); - s->mb_type_model[ctx][type][5] = 1 + 255 * p[3] / (1+p34); - s->mb_type_model[ctx][type][6] = 1 + 255 * p[1] / (1+p17); - s->mb_type_model[ctx][type][7] = 1 + 255 * p56 / (1+p5689); - s->mb_type_model[ctx][type][8] = 1 + 255 * p[5] / (1+p56); - s->mb_type_model[ctx][type][9] = 1 + 255 * p[8] / (1+p89); - - /* restore initial value */ - p[type] = 100 * s->mb_types_stats[ctx][type][1]; - } - } -} - -static vp56_mb_t vp56_parse_mb_type(vp56_context_t *s, - vp56_mb_t prev_type, int ctx) -{ - uint8_t *mb_type_model = s->mb_type_model[ctx][prev_type]; - vp56_range_coder_t *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(vp56_context_t *s, int row, int col) -{ - vp56_mv_t 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] = (vp56_mv_t) {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 == 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] = (vp56_mv_t) {mv.x/4, mv.y/4}; - } -} - -static vp56_mb_t vp56_decode_mv(vp56_context_t *s, int row, int col) -{ - vp56_mv_t *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(vp56_context_t *s, vp56_frame_t ref_frame) -{ - int idx = s->scantable.permutated[0]; - int i; - - for (i=0; i<6; i++) { - vp56_ref_dc_t *ab = &s->above_blocks[s->above_block_idx[i]]; - vp56_ref_dc_t *lb = &s->left_block[vp56_b6to4[i]]; - int count = 0; - int dc = 0; - - 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 == CODEC_ID_VP5) { - if (count < 2 && ref_frame == ab[-1].ref_frame) { - dc += ab[-1].dc_coeff; - count++; - } - if (count < 2 && ref_frame == ab[1].ref_frame) { - dc += ab[1].dc_coeff; - count++; - } - } - if (count == 0) - dc = s->prev_dc[vp56_b6to3[i]][ref_frame]; - else if (count == 2) - dc /= 2; - - s->block_coeff[i][idx] += dc; - s->prev_dc[vp56_b6to3[i]][ref_frame] = s->block_coeff[i][idx]; - ab->dc_coeff = s->block_coeff[i][idx]; - ab->ref_frame = ref_frame; - lb->dc_coeff = s->block_coeff[i][idx]; - lb->ref_frame = ref_frame; - s->block_coeff[i][idx] *= s->dequant_dc; - } -} - -static void vp56_edge_filter(vp56_context_t *s, uint8_t *yuv, - int pix_inc, int line_inc, int t) -{ - int pix2_inc = 2 * pix_inc; - int i, v; - - for (i=0; i<12; i++) { - v = (yuv[-pix2_inc] + 3*(yuv[0]-yuv[-pix_inc]) - yuv[pix_inc] + 4) >>3; - v = s->adjust(v, t); - yuv[-pix_inc] = clip_uint8(yuv[-pix_inc] + v); - yuv[0] = clip_uint8(yuv[0] - v); - yuv += line_inc; - } -} - -static void vp56_deblock_filter(vp56_context_t *s, uint8_t *yuv, - int stride, int dx, int dy) -{ - int t = vp56_filter_threshold[s->quantizer]; - if (dx) vp56_edge_filter(s, yuv + 10-dx , 1, stride, t); - if (dy) vp56_edge_filter(s, yuv + stride*(10-dy), stride, 1, t); -} - -static void vp56_mc(vp56_context_t *s, int b, uint8_t *src, - int stride, int x, int y) -{ - int plane = vp56_b6to3[b]; - 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]) { - ff_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->dsp.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->dsp.put_no_rnd_pixels_l2[1](dst, src_block+src_offset, - src_block+src_offset+overlap_offset, - stride, 8); - } else { - s->dsp.put_pixels_tab[1][0](dst, src_block+src_offset, stride, 8); - } -} - -static void vp56_decode_mb(vp56_context_t *s, int row, int col) -{ - AVFrame *frame_current, *frame_ref; - vp56_mb_t mb_type; - vp56_frame_t ref_frame; - int b, plan, 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]; - - memset(s->block_coeff, 0, sizeof(s->block_coeff)); - - s->parse_coeff(s); - - vp56_add_predictors_dc(s, ref_frame); - - frame_current = &s->frames[VP56_FRAME_CURRENT]; - frame_ref = &s->frames[ref_frame]; - - switch (mb_type) { - case VP56_MB_INTRA: - for (b=0; b<6; b++) { - plan = vp56_b6to3[b]; - s->dsp.idct_put(frame_current->data[plan] + s->block_offset[b], - s->stride[plan], s->block_coeff[b]); - } - break; - - case VP56_MB_INTER_NOVEC_PF: - case VP56_MB_INTER_NOVEC_GF: - for (b=0; b<6; b++) { - plan = vp56_b6to3[b]; - off = s->block_offset[b]; - s->dsp.put_pixels_tab[1][0](frame_current->data[plan] + off, - frame_ref->data[plan] + off, - s->stride[plan], 8); - s->dsp.idct_add(frame_current->data[plan] + off, - s->stride[plan], 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<6; b++) { - int x_off = b==1 || b==3 ? 8 : 0; - int y_off = b==2 || b==3 ? 8 : 0; - plan = vp56_b6to3[b]; - vp56_mc(s, b, frame_ref->data[plan], s->stride[plan], - 16*col+x_off, 16*row+y_off); - s->dsp.idct_add(frame_current->data[plan] + s->block_offset[b], - s->stride[plan], s->block_coeff[b]); - } - break; - } -} - -static int vp56_size_changed(AVCodecContext *avctx, vp56_context_t *s) -{ - int stride = s->frames[VP56_FRAME_CURRENT].linesize[0]; - int i; - - s->plane_width[0] = s->avctx->coded_width; - s->plane_width[1] = s->plane_width[2] = s->avctx->coded_width/2; - s->plane_height[0] = s->avctx->coded_height; - s->plane_height[1] = s->plane_height[2] = s->avctx->coded_height/2; - - for (i=0; i<3; i++) - s->stride[i] = s->flip * s->frames[VP56_FRAME_CURRENT].linesize[i]; - - s->mb_width = (s->avctx->coded_width+15) / 16; - s->mb_height = (s->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, - uint8_t *buf, int buf_size) -{ - vp56_context_t *s = avctx->priv_data; - AVFrame *const p = &s->frames[VP56_FRAME_CURRENT]; - AVFrame *picture = data; - 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; - - res = s->parse_header(s, buf, buf_size, &golden_frame); - if (!res) - return -1; - - 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, s)) { - 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[block], 0, 64*sizeof(s->coeff_ctx[block][0])); - } - 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); - - 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 (s->frames[VP56_FRAME_PREVIOUS].data[0] - && (s->frames[VP56_FRAME_PREVIOUS].data[0] - != s->frames[VP56_FRAME_GOLDEN].data[0])) { - avctx->release_buffer(avctx, &s->frames[VP56_FRAME_PREVIOUS]); - } - if (p->key_frame || golden_frame) { - if (s->frames[VP56_FRAME_GOLDEN].data[0]) - avctx->release_buffer(avctx, &s->frames[VP56_FRAME_GOLDEN]); - s->frames[VP56_FRAME_GOLDEN] = *p; - } - s->frames[VP56_FRAME_PREVIOUS] = *p; - - *picture = *p; - *data_size = sizeof(AVPicture); - - return buf_size; -} - -void vp56_init(vp56_context_t *s, AVCodecContext *avctx, int flip) -{ - int i; - - s->avctx = avctx; - avctx->pix_fmt = PIX_FMT_YUV420P; - - if (s->avctx->idct_algo == FF_IDCT_AUTO) - s->avctx->idct_algo = FF_IDCT_VP3; - dsputil_init(&s->dsp, s->avctx); - ff_init_scantable(s->dsp.idct_permutation, &s->scantable,ff_zigzag_direct); - - avcodec_set_dimensions(s->avctx, 0, 0); - - for (i=0; i<3; i++) - s->frames[i].data[0] = NULL; - s->edge_emu_buffer_alloc = NULL; - - s->above_blocks = NULL; - s->macroblocks = NULL; - s->quantizer = -1; - s->deblock_filtering = 1; - - s->filter = NULL; - - if (flip) { - s->flip = -1; - s->frbi = 2; - s->srbi = 0; - } else { - s->flip = 1; - s->frbi = 0; - s->srbi = 2; - } -} - -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->frames[VP56_FRAME_GOLDEN].data[0] - && (s->frames[VP56_FRAME_PREVIOUS].data[0] - != s->frames[VP56_FRAME_GOLDEN].data[0])) - avctx->release_buffer(avctx, &s->frames[VP56_FRAME_GOLDEN]); - if (s->frames[VP56_FRAME_PREVIOUS].data[0]) - avctx->release_buffer(avctx, &s->frames[VP56_FRAME_PREVIOUS]); - return 0; -} |