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reduce cpu requirement for generated comfort noise 

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@10584 d0543943-73ff-0310-b7d9-9358b9ac24b2
This commit is contained in:
Anthony Minessale 2008-12-03 23:38:12 +00:00
parent 33200c42c5
commit 9d71c0eeab
1 changed files with 5 additions and 3 deletions
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8
src/switch_resample.c
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@ -203,15 +203,17 @@ SWITCH_DECLARE(void) switch_swap_linear(int16_t *buf, int len)
SWITCH_DECLARE(void) switch_generate_sln_silence(int16_t *data, uint32_t samples, uint32_t divisor)
{
int16_t rnd, x;
int16_t rnd = 0, rnd2, x;
uint32_t i;
int sum_rnd = 0;
assert(divisor);
rnd2 = (int16_t) (intptr_t) &data + switch_timestamp(NULL);
for (i = 0; i < samples; i++, sum_rnd = 0) {
for (x = 0; x < 7; x++) {
rnd = (int16_t) (rand() * sizeof(int16_t));
for (x = 0; x < 10; x++) {
rnd += ((x + i) * rnd2);
sum_rnd += rnd;
}
switch_normalize_to_16bit(sum_rnd);