diff options
Diffstat (limited to 'libavcodec/h264_cabac.c')
| -rw-r--r-- | libavcodec/h264_cabac.c | 38 |
1 files changed, 29 insertions, 9 deletions
diff --git a/libavcodec/h264_cabac.c b/libavcodec/h264_cabac.c index 6bbf87f0ba..55cafc7bbc 100644 --- a/libavcodec/h264_cabac.c +++ b/libavcodec/h264_cabac.c @@ -1587,6 +1587,7 @@ static av_always_inline void decode_cabac_residual_internal( H264Context *h, DCT 9, 9,10,10, 8,11,12,11, 9, 9,10,10, 8,13,13, 9, 9,10,10, 8,13,13, 9, 9,10,10,14,14,14,14,14 } }; + static const uint8_t sig_coeff_offset_dc[7] = { 0, 0, 1, 1, 2, 2, 2 }; /* node ctx: 0..3: abslevel1 (with abslevelgt1 == 0). * 4..7: abslevelgt1 + 3 (and abslevel1 doesn't matter). * map node ctx => cabac ctx for level=1 */ @@ -1651,12 +1652,20 @@ static av_always_inline void decode_cabac_residual_internal( H264Context *h, DCT coeff_count= decode_significance_8x8_x86(CC, significant_coeff_ctx_base, index, last_coeff_ctx_base, sig_off); } else { - coeff_count= decode_significance_x86(CC, max_coeff, significant_coeff_ctx_base, index, - last_coeff_ctx_base-significant_coeff_ctx_base); + if (is_dc && max_coeff == 8) { // dc 422 + DECODE_SIGNIFICANCE(7, sig_coeff_offset_dc[last], sig_coeff_offset_dc[last]); + } else { + coeff_count= decode_significance_x86(CC, max_coeff, significant_coeff_ctx_base, index, + last_coeff_ctx_base-significant_coeff_ctx_base); + } #else DECODE_SIGNIFICANCE( 63, sig_off[last], last_coeff_flag_offset_8x8[last] ); } else { - DECODE_SIGNIFICANCE( max_coeff - 1, last, last ); + if (is_dc && max_coeff == 8) { // dc 422 + DECODE_SIGNIFICANCE(7, sig_coeff_offset_dc[last], sig_coeff_offset_dc[last]); + } else { + DECODE_SIGNIFICANCE(max_coeff - 1, last, last); + } #endif } assert(coeff_count > 0); @@ -1692,6 +1701,8 @@ static av_always_inline void decode_cabac_residual_internal( H264Context *h, DCT } \ } else { \ int coeff_abs = 2; \ + if (is_dc && max_coeff == 8) \ + node_ctx = FFMIN(node_ctx, 6); \ ctx = coeff_abs_levelgt1_ctx[node_ctx] + abs_level_m1_ctx_base; \ node_ctx = coeff_abs_level_transition[1][node_ctx]; \ \ @@ -2315,22 +2326,31 @@ decode_intra_mb: decode_cabac_luma_residual(h, scan, scan8x8, pixel_shift, mb_type, cbp, 1); decode_cabac_luma_residual(h, scan, scan8x8, pixel_shift, mb_type, cbp, 2); } else { + const int num_c8x8 = h->sps.chroma_format_idc; + if( cbp&0x30 ){ int c; for( c = 0; c < 2; c++ ) { //av_log( s->avctx, AV_LOG_ERROR, "INTRA C%d-DC\n",c ); - decode_cabac_residual_dc(h, h->mb + ((256 + 16*16*c) << pixel_shift), 3, CHROMA_DC_BLOCK_INDEX+c, chroma_dc_scan, 4); + decode_cabac_residual_dc(h, h->mb + ((256 + 16*16*c) << pixel_shift), 3, + CHROMA_DC_BLOCK_INDEX+c, + CHROMA422 ? chroma422_dc_scan : chroma_dc_scan, + 4*num_c8x8); } } if( cbp&0x20 ) { - int c, i; + int c, i, i8x8; for( c = 0; c < 2; c++ ) { + DCTELEM *mb = h->mb + (16*(16 + 16*c) << pixel_shift); qmul = h->dequant4_coeff[c+1+(IS_INTRA( mb_type ) ? 0:3)][h->chroma_qp[c]]; - for( i = 0; i < 4; i++ ) { - const int index = 16 + 16 * c + i; - //av_log( s->avctx, AV_LOG_ERROR, "INTRA C%d-AC %d\n",c, index - 16 ); - decode_cabac_residual_nondc(h, h->mb + (16*index << pixel_shift), 4, index, scan + 1, qmul, 15); + for (i8x8 = 0; i8x8 < num_c8x8; i8x8++) { + for (i = 0; i < 4; i++) { + const int index = 16 + 16 * c + 8*i8x8 + i; + //av_log(s->avctx, AV_LOG_ERROR, "INTRA C%d-AC %d\n",c, index - 16); + decode_cabac_residual_nondc(h, mb, 4, index, scan + 1, qmul, 15); + mb += 16<<pixel_shift; + } } } } else { |