static int eval_refl(int *refl, const int16_t *coefs, RA144Context *ractx) { int b, c, i; unsigned int u; int buffer1[10]; int buffer2[10]; int *bp1 = buffer1; int *bp2 = buffer2; for (i=0; i < 10; i++) buffer2[i] = coefs[i]; refl[9] = bp2[9]; if ((unsigned) bp2[9] + 0x1000 > 0x1fff) { av_log(ractx, AV_LOG_ERROR, "Overflow. Broken sample?\n"); return 1; } for (c=8; c >= 0; c--) { b = 0x1000-((bp2[c+1] * bp2[c+1]) >> 12); if (!b) b = -2; for (u=0; u<=c; u++) bp1[u] = ((bp2[u] - ((refl[c+1] * bp2[c-u]) >> 12)) * (0x1000000 / b)) >> 12; refl[c] = bp1[c]; if ((unsigned) bp1[c] + 0x1000 > 0x1fff) return 1; FFSWAP(int *, bp1, bp2); } return 0; }