kenmirrors/freeswitch
1
0
Fork 0
mirror of https://github.com/signalwire/freeswitch.git synced 2025-08-14 01:49:05 +00:00
Code Issues Projects Releases Wiki Activity

agc tweaks

Browse Source
This commit is contained in:
Anthony Minessale
2011-02-20 14:37:23 -06:00
parent 78472897cd
commit 180e3d4ab1
3 changed files with 104 additions and 26 deletions
Download Patch File Download Diff File Expand all files Collapse all files

37
src/switch_resample.c
View File

@@ -269,6 +269,43 @@ SWITCH_DECLARE(void) switch_mux_channels(int16_t *data, switch_size_t samples, u
}
SWITCH_DECLARE(void) switch_change_sln_volume_granular(int16_t *data, uint32_t samples, int32_t vol)
{
double newrate = 0;
double pos[12] = {1.25, 1.50, 1.75, 2.0, 2.25, 2.50, 2.75, 3.0, 3.25, 3.50, 3.75, 4.0};
double neg[12] = {.917, .834, .751, .668, .585, .502, .419, .336, .253, .017, .087, .004};
double *chart;
uint32_t i;
if (vol == 0) return;
switch_normalize_volume_granular(vol);
if (vol > 0) {
chart = pos;
} else {
chart = neg;
}
i = abs(vol) - 1;
switch_assert(i < 12);
newrate = chart[i];
if (newrate) {
int32_t tmp;
uint32_t x;
int16_t *fp = data;
for (x = 0; x < samples; x++) {
tmp = (int32_t) fp[x] * newrate;
switch_normalize_to_16bit(tmp);
fp[x] = (int16_t) tmp;
}
}
}
SWITCH_DECLARE(void) switch_change_sln_volume(int16_t *data, uint32_t samples, int32_t vol)
{
double newrate = 0;