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Merge branch 'master' into vector_control2

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This commit is contained in:
Anton Babushkin
2013-12-13 17:26:07 +04:00
parent bae2171edb c46bd8b041
commit 6705e9518b
40 changed files with 1804 additions and 443 deletions
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src/lib/mathlib/math/filter/LowPassFilter2p.cpp
+8
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@@ -46,6 +46,10 @@ namespace math
void LowPassFilter2p::set_cutoff_frequency(float sample_freq, float cutoff_freq)
{
_cutoff_freq = cutoff_freq;
if (_cutoff_freq <= 0.0f) {
// no filtering
return;
}
float fr = sample_freq/_cutoff_freq;
float ohm = tanf(M_PI_F/fr);
float c = 1.0f+2.0f*cosf(M_PI_F/4.0f)*ohm + ohm*ohm;
@@ -58,6 +62,10 @@ void LowPassFilter2p::set_cutoff_frequency(float sample_freq, float cutoff_freq)
float LowPassFilter2p::apply(float sample)
{
if (_cutoff_freq <= 0.0f) {
// no filtering
return sample;
}
// do the filtering
float delay_element_0 = sample - _delay_element_1 * _a1 - _delay_element_2 * _a2;
if (isnan(delay_element_0) || isinf(delay_element_0)) {