/* reconstruct A(z) */
for (k = 0; k < order>>1; k++) {
- lpc32[k] = -p[k + 1] - p[k] - q[k + 1] + q[k];
- lpc32[order-k-1] = -p[k + 1] - p[k] + q[k + 1] - q[k];
+ int32_t p_tmp = p[k + 1] + p[k];
+ int32_t q_tmp = q[k + 1] - q[k];
+ lpc32[k] = -q_tmp - p_tmp;
+ lpc32[order-k-1] = q_tmp - p_tmp;
}
/* limit the range of the LPC coefficients to each fit within an int16_t */