static void
MP3MixAudio (char * dst, u8 * src, int len)
{
s16 *s, *d;
int i;
double lsample;
double rsample;
s = (s16 *) src;
d = (s16 *) dst;
for (i = 0; i < len >> 1; i += 2)
{
lsample = ((int) ((double) d[i] * mp3volume) + (int)((double) s[i] * fxvolume));
rsample = ((int) ((double) d[i + 1] * mp3volume) + (int)((double) s[i + 1] * fxvolume));
// lsample = (int)((double) s[i] * fxvolume);
// rsample = (int)((double) s[i + 1] * fxvolume);
lsample = do_3band (&eqs, lsample);
rsample = do_3band (&eqs, rsample);
if (lsample < -32768)
lsample = -32768;
else
{
if (lsample > 32767)
lsample = 32767;
}
if (rsample < -32768)
rsample = -32768;
else
{
if (rsample > 32767)
rsample = 32767;
}
d[i] = (s16) lsample;
d[i + 1] = (s16) rsample;
}
}
float nixecho::do_right(float in)
{
if (!std::isnan(feedback_right) && feedback_right > -1 && feedback_right < 1)
{
buffer_right[play_head] = feedback_right;
}
delay_right++;
if (delay_right >= echo_speed) {delay_right = 0; }
feedback_right = in + do_3band(eq2, buffer_right[delay_right] * echo_decay);
return feedback_right;
}
float nixecho::do_left(float in)
{
if (!std::isnan(feedback_left) && feedback_left > -1 && feedback_left < 1)
{
buffer_left[play_head] = feedback_left;
}
play_head++;
if (play_head >= echo_speed) {play_head = 0; }
delay_left++;
if (delay_left >= echo_speed) {delay_left = 0; }
feedback_left = in + do_3band(eq, buffer_left[delay_left] * echo_decay);
return feedback_left;
}