static av_always_inline void fic_idct(int16_t *blk, int step, int shift, int rnd) { const int t0 = 27246 * blk[3 * step] + 18405 * blk[5 * step]; const int t1 = 27246 * blk[5 * step] - 18405 * blk[3 * step]; const int t2 = 6393 * blk[7 * step] + 32139 * blk[1 * step]; const int t3 = 6393 * blk[1 * step] - 32139 * blk[7 * step]; const unsigned t4 = 5793U * (t2 + t0 + 0x800 >> 12); const unsigned t5 = 5793U * (t3 + t1 + 0x800 >> 12); const unsigned t6 = t2 - t0; const unsigned t7 = t3 - t1; const unsigned t8 = 17734 * blk[2 * step] - 42813 * blk[6 * step]; const unsigned t9 = 17734 * blk[6 * step] + 42814 * blk[2 * step]; const unsigned tA = (blk[0 * step] - blk[4 * step]) * 32768 + rnd; const unsigned tB = (blk[0 * step] + blk[4 * step]) * 32768 + rnd; blk[0 * step] = (int)( t4 + t9 + tB) >> shift; blk[1 * step] = (int)( t6 + t7 + t8 + tA) >> shift; blk[2 * step] = (int)( t6 - t7 - t8 + tA) >> shift; blk[3 * step] = (int)( t5 - t9 + tB) >> shift; blk[4 * step] = (int)( -t5 - t9 + tB) >> shift; blk[5 * step] = (int)(-(t6 - t7) - t8 + tA) >> shift; blk[6 * step] = (int)(-(t6 + t7) + t8 + tA) >> shift; blk[7 * step] = (int)( -t4 + t9 + tB) >> shift; }