diff options
author | Ronald S. Bultje <rsbultje@gmail.com> | 2011-01-21 01:24:19 +0300 |
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committer | Michael Niedermayer <michaelni@gmx.at> | 2011-01-21 22:36:01 +0300 |
commit | 772225c041507eba3fd5f9cfcb37d58bfbd579d4 (patch) | |
tree | 9158401dc3dd3d4aea715b9ab27b1016ac5819c9 /libavcodec/h264.c | |
parent | 2293b0b698ce44d34897cc092bf1eb6b3571b7f8 (diff) |
Revert 2a1f431d38ea9c05abb215d70c7dc09cdb6888ab, it broke H264 lossless.
(cherry picked from commit 66c6b5e2a5e6376c4a5c65b1d96fd7a1580bdfcf)
Diffstat (limited to 'libavcodec/h264.c')
-rw-r--r-- | libavcodec/h264.c | 97 |
1 files changed, 91 insertions, 6 deletions
diff --git a/libavcodec/h264.c b/libavcodec/h264.c index d0ee4744c8..40dc276dd6 100644 --- a/libavcodec/h264.c +++ b/libavcodec/h264.c @@ -246,6 +246,93 @@ int ff_h264_decode_rbsp_trailing(H264Context *h, const uint8_t *src){ return 0; } +#if 0 +/** + * DCT transforms the 16 dc values. + * @param qp quantization parameter ??? FIXME + */ +static void h264_luma_dc_dct_c(DCTELEM *block/*, int qp*/){ +// const int qmul= dequant_coeff[qp][0]; + int i; + int temp[16]; //FIXME check if this is a good idea + static const int x_offset[4]={0, 1*stride, 4* stride, 5*stride}; + static const int y_offset[4]={0, 2*stride, 8* stride, 10*stride}; + + for(i=0; i<4; i++){ + const int offset= y_offset[i]; + const int z0= block[offset+stride*0] + block[offset+stride*4]; + const int z1= block[offset+stride*0] - block[offset+stride*4]; + const int z2= block[offset+stride*1] - block[offset+stride*5]; + const int z3= block[offset+stride*1] + block[offset+stride*5]; + + temp[4*i+0]= z0+z3; + temp[4*i+1]= z1+z2; + temp[4*i+2]= z1-z2; + temp[4*i+3]= z0-z3; + } + + for(i=0; i<4; i++){ + const int offset= x_offset[i]; + const int z0= temp[4*0+i] + temp[4*2+i]; + const int z1= temp[4*0+i] - temp[4*2+i]; + const int z2= temp[4*1+i] - temp[4*3+i]; + const int z3= temp[4*1+i] + temp[4*3+i]; + + block[stride*0 +offset]= (z0 + z3)>>1; + block[stride*2 +offset]= (z1 + z2)>>1; + block[stride*8 +offset]= (z1 - z2)>>1; + block[stride*10+offset]= (z0 - z3)>>1; + } +} +#endif + +#undef xStride +#undef stride + +static void chroma_dc_dequant_idct_c(DCTELEM *block, int qmul){ + const int stride= 16*2; + const int xStride= 16; + int a,b,c,d,e; + + a= block[stride*0 + xStride*0]; + b= block[stride*0 + xStride*1]; + c= block[stride*1 + xStride*0]; + d= block[stride*1 + xStride*1]; + + e= a-b; + a= a+b; + b= c-d; + c= c+d; + + block[stride*0 + xStride*0]= ((a+c)*qmul) >> 7; + block[stride*0 + xStride*1]= ((e+b)*qmul) >> 7; + block[stride*1 + xStride*0]= ((a-c)*qmul) >> 7; + block[stride*1 + xStride*1]= ((e-b)*qmul) >> 7; +} + +#if 0 +static void chroma_dc_dct_c(DCTELEM *block){ + const int stride= 16*2; + const int xStride= 16; + int a,b,c,d,e; + + a= block[stride*0 + xStride*0]; + b= block[stride*0 + xStride*1]; + c= block[stride*1 + xStride*0]; + d= block[stride*1 + xStride*1]; + + e= a-b; + a= a+b; + b= c-d; + c= c+d; + + block[stride*0 + xStride*0]= (a+c); + block[stride*0 + xStride*1]= (e+b); + block[stride*1 + xStride*0]= (a-c); + block[stride*1 + xStride*1]= (e-b); +} +#endif + static inline void mc_dir_part(H264Context *h, Picture *pic, int n, int square, int chroma_height, int delta, int list, uint8_t *dest_y, uint8_t *dest_cb, uint8_t *dest_cr, int src_x_offset, int src_y_offset, @@ -1196,19 +1283,17 @@ static av_always_inline void hl_decode_mb_internal(H264Context *h, int simple){ } } }else{ - int chroma_qpu = h->dequant4_coeff[IS_INTRA(mb_type) ? 1:4][h->chroma_qp[0]][0]; - int chroma_qpv = h->dequant4_coeff[IS_INTRA(mb_type) ? 2:5][h->chroma_qp[1]][0]; if(is_h264){ if(h->non_zero_count_cache[ scan8[CHROMA_DC_BLOCK_INDEX+0] ]) - h->h264dsp.h264_chroma_dc_dequant_idct(h->mb + 16*16+0*16, &h->mb_chroma_dc[0], chroma_qpu ); + chroma_dc_dequant_idct_c(h->mb + 16*16 , h->dequant4_coeff[IS_INTRA(mb_type) ? 1:4][h->chroma_qp[0]][0]); if(h->non_zero_count_cache[ scan8[CHROMA_DC_BLOCK_INDEX+1] ]) - h->h264dsp.h264_chroma_dc_dequant_idct(h->mb + 16*16+4*16, &h->mb_chroma_dc[1], chroma_qpv ); + chroma_dc_dequant_idct_c(h->mb + 16*16+4*16, h->dequant4_coeff[IS_INTRA(mb_type) ? 2:5][h->chroma_qp[1]][0]); h->h264dsp.h264_idct_add8(dest, block_offset, h->mb, uvlinesize, h->non_zero_count_cache); }else{ - h->h264dsp.h264_chroma_dc_dequant_idct(h->mb + 16*16+0*16, &h->mb_chroma_dc[0], chroma_qpu ); - h->h264dsp.h264_chroma_dc_dequant_idct(h->mb + 16*16+4*16, &h->mb_chroma_dc[1], chroma_qpv ); + chroma_dc_dequant_idct_c(h->mb + 16*16 , h->dequant4_coeff[IS_INTRA(mb_type) ? 1:4][h->chroma_qp[0]][0]); + chroma_dc_dequant_idct_c(h->mb + 16*16+4*16, h->dequant4_coeff[IS_INTRA(mb_type) ? 2:5][h->chroma_qp[1]][0]); for(i=16; i<16+8; i++){ if(h->non_zero_count_cache[ scan8[i] ] || h->mb[i*16]){ uint8_t * const ptr= dest[(i&4)>>2] + block_offset[i]; |