diff options
Diffstat (limited to 'libavcodec/h264_cavlc.c')
| -rw-r--r-- | libavcodec/h264_cavlc.c | 48 |
1 files changed, 15 insertions, 33 deletions
diff --git a/libavcodec/h264_cavlc.c b/libavcodec/h264_cavlc.c index c4159e241c..a4debade2e 100644 --- a/libavcodec/h264_cavlc.c +++ b/libavcodec/h264_cavlc.c @@ -2,20 +2,20 @@ * H.26L/H.264/AVC/JVT/14496-10/... cavlc bitstream decoding * Copyright (c) 2003 Michael Niedermayer <michaelni@gmx.at> * - * This file is part of Libav. + * This file is part of FFmpeg. * - * Libav is free software; you can redistribute it and/or + * 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. * - * Libav is distributed in the hope that it will be useful, + * 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 Libav; if not, write to the Free Software + * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ @@ -26,6 +26,7 @@ */ #define CABAC 0 +#define UNCHECKED_BITSTREAM_READER 1 #include "internal.h" #include "avcodec.h" @@ -1122,12 +1123,15 @@ decode_intra_mb: if( decode_luma_residual(h, gb, scan, scan8x8, pixel_shift, mb_type, cbp, 2) < 0 ){ return -1; } - } else if (CHROMA422) { + } else { + const int num_c8x8 = h->sps.chroma_format_idc; + if(cbp&0x30){ for(chroma_idx=0; chroma_idx<2; chroma_idx++) if (decode_residual(h, gb, h->mb + ((256 + 16*16*chroma_idx) << pixel_shift), - CHROMA_DC_BLOCK_INDEX+chroma_idx, chroma422_dc_scan, - NULL, 8) < 0) { + CHROMA_DC_BLOCK_INDEX+chroma_idx, + CHROMA422 ? chroma422_dc_scan : chroma_dc_scan, + NULL, 4*num_c8x8) < 0) { return -1; } } @@ -1136,34 +1140,12 @@ decode_intra_mb: for(chroma_idx=0; chroma_idx<2; chroma_idx++){ const uint32_t *qmul = h->dequant4_coeff[chroma_idx+1+(IS_INTRA( mb_type ) ? 0:3)][h->chroma_qp[chroma_idx]]; DCTELEM *mb = h->mb + (16*(16 + 16*chroma_idx) << pixel_shift); - for (i8x8 = 0; i8x8 < 2; i8x8++) { - for (i4x4 = 0; i4x4 < 4; i4x4++) { - const int index = 16 + 16*chroma_idx + 8*i8x8 + i4x4; + for (i8x8=0; i8x8<num_c8x8; i8x8++) { + for (i4x4=0; i4x4<4; i4x4++) { + const int index= 16 + 16*chroma_idx + 8*i8x8 + i4x4; if (decode_residual(h, gb, mb, index, scan + 1, qmul, 15) < 0) return -1; - mb += 16 << pixel_shift; - } - } - } - }else{ - fill_rectangle(&h->non_zero_count_cache[scan8[16]], 4, 4, 8, 0, 1); - fill_rectangle(&h->non_zero_count_cache[scan8[32]], 4, 4, 8, 0, 1); - } - } else /* yuv420 */ { - if(cbp&0x30){ - for(chroma_idx=0; chroma_idx<2; chroma_idx++) - if( decode_residual(h, gb, h->mb + ((256 + 16*16*chroma_idx) << pixel_shift), CHROMA_DC_BLOCK_INDEX+chroma_idx, chroma_dc_scan, NULL, 4) < 0){ - return -1; - } - } - - if(cbp&0x20){ - for(chroma_idx=0; chroma_idx<2; chroma_idx++){ - const uint32_t *qmul = h->dequant4_coeff[chroma_idx+1+(IS_INTRA( mb_type ) ? 0:3)][h->chroma_qp[chroma_idx]]; - for(i4x4=0; i4x4<4; i4x4++){ - const int index= 16 + 16*chroma_idx + i4x4; - if( decode_residual(h, gb, h->mb + (16*index << pixel_shift), index, scan + 1, qmul, 15) < 0){ - return -1; + mb += 16<<pixel_shift; } } } |