int ff_celp_lp_synthesis_filter(int16_t *out, const int16_t *filter_coeffs,
const int16_t *in, int buffer_length,
int filter_length, int stop_on_overflow,
- int rounder)
+ int shift, int rounder)
{
int i,n;
for (i = 1; i <= filter_length; i++)
sum -= filter_coeffs[i-1] * out[n-i];
- sum = (sum >> 12) + in[n];
+ sum = ((sum >> 12) + in[n]) >> shift;
if (sum + 0x8000 > 0xFFFFU) {
if (stop_on_overflow)
* @param filter_length filter length (10 for 10th order LP filter)
* @param stop_on_overflow 1 - return immediately if overflow occurs
* 0 - ignore overflows
+ * @param shift the result is shifted right by this value
* @param rounder the amount to add for rounding (usually 0x800 or 0xfff)
*
* @return 1 if overflow occurred, 0 - otherwise
int ff_celp_lp_synthesis_filter(int16_t *out, const int16_t *filter_coeffs,
const int16_t *in, int buffer_length,
int filter_length, int stop_on_overflow,
- int rounder);
+ int shift, int rounder);
/**
* LP synthesis filter.
LPC_ORDER*sizeof(*ractx->curr_sblock));
if (ff_celp_lp_synthesis_filter(ractx->curr_sblock + LPC_ORDER, lpc_coefs,
- block, BLOCKSIZE, LPC_ORDER, 1, 0xfff))
+ block, BLOCKSIZE, LPC_ORDER, 1, 0, 0xfff))
memset(ractx->curr_sblock, 0, (LPC_ORDER+BLOCKSIZE)*sizeof(*ractx->curr_sblock));
}