diff options
Diffstat (limited to 'libavcodec/h264idct_template.c')
| -rw-r--r-- | libavcodec/h264idct_template.c | 103 |
1 files changed, 86 insertions, 17 deletions
diff --git a/libavcodec/h264idct_template.c b/libavcodec/h264idct_template.c index ba55715..64bc70d 100644 --- a/libavcodec/h264idct_template.c +++ b/libavcodec/h264idct_template.c @@ -2,20 +2,20 @@ * H.264 IDCT * Copyright (c) 2004-2011 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 */ @@ -52,7 +52,7 @@ void FUNCC(ff_h264_idct_add)(uint8_t *_dst, DCTELEM *_block, int stride) INIT_CLIP pixel *dst = (pixel*)_dst; dctcoef *block = (dctcoef*)_block; - stride /= sizeof(pixel); + stride >>= sizeof(pixel)-1; block[0] += 1 << 5; @@ -86,7 +86,7 @@ void FUNCC(ff_h264_idct8_add)(uint8_t *_dst, DCTELEM *_block, int stride){ INIT_CLIP pixel *dst = (pixel*)_dst; dctcoef *block = (dctcoef*)_block; - stride /= sizeof(pixel); + stride >>= sizeof(pixel)-1; block[0] += 32; @@ -155,12 +155,12 @@ void FUNCC(ff_h264_idct8_add)(uint8_t *_dst, DCTELEM *_block, int stride){ } // assumes all AC coefs are 0 -void FUNCC(ff_h264_idct_dc_add)(uint8_t *_dst, DCTELEM *block, int stride){ +void FUNCC(ff_h264_idct_dc_add)(uint8_t *p_dst, DCTELEM *block, int stride){ int i, j; int dc = (((dctcoef*)block)[0] + 32) >> 6; INIT_CLIP - pixel *dst = (pixel*)_dst; - stride /= sizeof(pixel); + pixel *dst = (pixel*)p_dst; + stride >>= sizeof(pixel)-1; for( j = 0; j < 4; j++ ) { for( i = 0; i < 4; i++ ) @@ -169,12 +169,12 @@ void FUNCC(ff_h264_idct_dc_add)(uint8_t *_dst, DCTELEM *block, int stride){ } } -void FUNCC(ff_h264_idct8_dc_add)(uint8_t *_dst, DCTELEM *block, int stride){ +void FUNCC(ff_h264_idct8_dc_add)(uint8_t *p_dst, DCTELEM *block, int stride){ int i, j; int dc = (((dctcoef*)block)[0] + 32) >> 6; INIT_CLIP - pixel *dst = (pixel*)_dst; - stride /= sizeof(pixel); + pixel *dst = (pixel*)p_dst; + stride >>= sizeof(pixel)-1; for( j = 0; j < 8; j++ ) { for( i = 0; i < 8; i++ ) @@ -224,17 +224,50 @@ void FUNCC(ff_h264_idct_add8)(uint8_t **dest, const int *block_offset, DCTELEM * } } } + +void FUNCC(ff_h264_idct_add8_422)(uint8_t **dest, const int *block_offset, DCTELEM *block, int stride, const uint8_t nnzc[15*8]){ + int i, j; + +#if 0 + av_log(NULL, AV_LOG_INFO, "idct\n"); + int32_t *b = block; + for (int i = 0; i < 256; i++) { + av_log(NULL, AV_LOG_INFO, "%5d ", b[i+256]); + if (!((i+1) % 16)) + av_log(NULL, AV_LOG_INFO, "\n"); + } +#endif + + for(j=1; j<3; j++){ + for(i=j*16; i<j*16+4; i++){ + if(nnzc[ scan8[i] ]) + FUNCC(ff_h264_idct_add )(dest[j-1] + block_offset[i], block + i*16*sizeof(pixel), stride); + else if(((dctcoef*)block)[i*16]) + FUNCC(ff_h264_idct_dc_add)(dest[j-1] + block_offset[i], block + i*16*sizeof(pixel), stride); + } + } + + for(j=1; j<3; j++){ + for(i=j*16+4; i<j*16+8; i++){ + if(nnzc[ scan8[i+4] ]) + FUNCC(ff_h264_idct_add )(dest[j-1] + block_offset[i+4], block + i*16*sizeof(pixel), stride); + else if(((dctcoef*)block)[i*16]) + FUNCC(ff_h264_idct_dc_add)(dest[j-1] + block_offset[i+4], block + i*16*sizeof(pixel), stride); + } + } +} + /** * IDCT transforms the 16 dc values and dequantizes them. * @param qmul quantization parameter */ -void FUNCC(ff_h264_luma_dc_dequant_idct)(DCTELEM *_output, DCTELEM *_input, int qmul){ +void FUNCC(ff_h264_luma_dc_dequant_idct)(DCTELEM *p_output, DCTELEM *p_input, int qmul){ #define stride 16 int i; int temp[16]; static const uint8_t x_offset[4]={0, 2*stride, 8*stride, 10*stride}; - dctcoef *input = (dctcoef*)_input; - dctcoef *output = (dctcoef*)_output; + dctcoef *input = (dctcoef*)p_input; + dctcoef *output = (dctcoef*)p_output; for(i=0; i<4; i++){ const int z0= input[4*i+0] + input[4*i+1]; @@ -263,11 +296,47 @@ void FUNCC(ff_h264_luma_dc_dequant_idct)(DCTELEM *_output, DCTELEM *_input, int #undef stride } -void FUNCC(ff_h264_chroma_dc_dequant_idct)(DCTELEM *_block, int qmul){ +void FUNCC(ff_h264_chroma422_dc_dequant_idct)(DCTELEM *p_block, int qmul){ + const int stride= 16*2; + const int xStride= 16; + int i; + int temp[8]; + static const uint8_t x_offset[2]={0, 16}; + dctcoef *block = (dctcoef*)p_block; + + for(i=0; i<4; i++){ + temp[2*i+0] = block[stride*i + xStride*0] + block[stride*i + xStride*1]; + temp[2*i+1] = block[stride*i + xStride*0] - block[stride*i + xStride*1]; + } + + for(i=0; i<2; i++){ + const int offset= x_offset[i]; + const int z0= temp[2*0+i] + temp[2*2+i]; + const int z1= temp[2*0+i] - temp[2*2+i]; + const int z2= temp[2*1+i] - temp[2*3+i]; + const int z3= temp[2*1+i] + temp[2*3+i]; + + block[stride*0+offset]= ((z0 + z3)*qmul + 128) >> 8; + block[stride*1+offset]= ((z1 + z2)*qmul + 128) >> 8; + block[stride*2+offset]= ((z1 - z2)*qmul + 128) >> 8; + block[stride*3+offset]= ((z0 - z3)*qmul + 128) >> 8; + } + +#if 0 + av_log(NULL, AV_LOG_INFO, "after chroma dc\n"); + for (int i = 0; i < 256; i++) { + av_log(NULL, AV_LOG_INFO, "%5d ", block[i]); + if (!((i+1) % 16)) + av_log(NULL, AV_LOG_INFO, "\n"); + } +#endif +} + +void FUNCC(ff_h264_chroma_dc_dequant_idct)(DCTELEM *p_block, int qmul){ const int stride= 16*2; const int xStride= 16; int a,b,c,d,e; - dctcoef *block = (dctcoef*)_block; + dctcoef *block = (dctcoef*)p_block; a= block[stride*0 + xStride*0]; b= block[stride*0 + xStride*1]; |
