Commit 8aac5585 authored by Mohamed Naufal Basheer's avatar Mohamed Naufal Basheer Committed by Kostya Shishkov
Browse files

Add a shift parameter to celp_lp_synthesis_filter()



This is intended for reuse by the G.723.1 decoder
Signed-off-by: default avatarKostya Shishkov <kostya.shishkov@gmail.com>
parent 51a5ddfa
......@@ -58,7 +58,7 @@ void ff_celp_circ_addf(float *out, const float *in,
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;
......@@ -67,7 +67,7 @@ int ff_celp_lp_synthesis_filter(int16_t *out, const int16_t *filter_coeffs,
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)
......
......@@ -63,6 +63,7 @@ void ff_celp_circ_addf(float *out, const float *in,
* @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
......@@ -75,7 +76,7 @@ void ff_celp_circ_addf(float *out, const float *in,
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.
......
......@@ -1715,6 +1715,6 @@ void ff_subblock_synthesis(RA144Context *ractx, const uint16_t *lpc_coefs,
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));
}
Markdown is supported
0% or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment