void FUNCC(ff_h264_idct_add)(uint8_t *_dst, DCTELEM *_block, int stride) { int i; INIT_CLIP pixel *dst = (pixel*)_dst; dctcoef *block = (dctcoef*)_block; stride /= sizeof(pixel); block[0] += 1 << 5; for(i=0; i<4; i++){ const int z0= block[i + 4*0] + block[i + 4*2]; const int z1= block[i + 4*0] - block[i + 4*2]; const int z2= (block[i + 4*1]>>1) - block[i + 4*3]; const int z3= block[i + 4*1] + (block[i + 4*3]>>1); block[i + 4*0]= z0 + z3; block[i + 4*1]= z1 + z2; block[i + 4*2]= z1 - z2; block[i + 4*3]= z0 - z3; } for(i=0; i<4; i++){ const int z0= block[0 + 4*i] + block[2 + 4*i]; const int z1= block[0 + 4*i] - block[2 + 4*i]; const int z2= (block[1 + 4*i]>>1) - block[3 + 4*i]; const int z3= block[1 + 4*i] + (block[3 + 4*i]>>1); dst[i + 0*stride]= CLIP(dst[i + 0*stride] + ((z0 + z3) >> 6)); dst[i + 1*stride]= CLIP(dst[i + 1*stride] + ((z1 + z2) >> 6)); dst[i + 2*stride]= CLIP(dst[i + 2*stride] + ((z1 - z2) >> 6)); dst[i + 3*stride]= CLIP(dst[i + 3*stride] + ((z0 - z3) >> 6)); } }