static void vc1_inv_trans_4x4_c(uint8_t *dest, int linesize, DCTELEM *block) { int i; register int t1,t2,t3,t4; DCTELEM *src, *dst; const uint8_t *cm = ff_cropTbl + MAX_NEG_CROP; src = block; dst = block; for(i = 0; i < 4; i++){ t1 = 17 * (src[0] + src[2]) + 4; t2 = 17 * (src[0] - src[2]) + 4; t3 = 22 * src[1] + 10 * src[3]; t4 = 22 * src[3] - 10 * src[1]; dst[0] = (t1 + t3) >> 3; dst[1] = (t2 - t4) >> 3; dst[2] = (t2 + t4) >> 3; dst[3] = (t1 - t3) >> 3; src += 8; dst += 8; } src = block; for(i = 0; i < 4; i++){ t1 = 17 * (src[ 0] + src[16]) + 64; t2 = 17 * (src[ 0] - src[16]) + 64; t3 = 22 * src[ 8] + 10 * src[24]; t4 = 22 * src[24] - 10 * src[ 8]; dest[0*linesize] = cm[dest[0*linesize] + ((t1 + t3) >> 7)]; dest[1*linesize] = cm[dest[1*linesize] + ((t2 - t4) >> 7)]; dest[2*linesize] = cm[dest[2*linesize] + ((t2 + t4) >> 7)]; dest[3*linesize] = cm[dest[3*linesize] + ((t1 - t3) >> 7)]; src ++; dest++; } }