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Version 4.3.0

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This commit is contained in:
Gary Scavone
2009-03-24 23:02:15 -04:00
committed by Stephen Sinclair
parent 2cbce2d8bd
commit 27d9b79dc7
271 changed files with 22219 additions and 8834 deletions
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35
src/BiQuad.cpp
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@@ -8,7 +8,7 @@
frequency response while maintaining a constant
filter gain.
by Perry R. Cook and Gary P. Scavone, 1995 - 2005.
by Perry R. Cook and Gary P. Scavone, 1995 - 2007.
*/
/***************************************************/
@@ -22,10 +22,20 @@ BiQuad :: BiQuad() : Filter()
b[0] = 1.0;
a[0] = 1.0;
Filter::setCoefficients( b, a );
Stk::addSampleRateAlert( this );
}
BiQuad :: ~BiQuad()
{
Stk::removeSampleRateAlert( this );
}
void BiQuad :: sampleRateChanged( StkFloat newRate, StkFloat oldRate )
{
if ( !ignoreSampleRateChange_ ) {
errorString_ << "BiQuad::sampleRateChanged: you may need to recompute filter coefficients!";
handleError( StkError::WARNING );
}
}
void BiQuad :: clear(void)
@@ -99,26 +109,3 @@ StkFloat BiQuad :: lastOut(void) const
{
return Filter::lastOut();
}
StkFloat BiQuad :: computeSample( StkFloat input )
{
inputs_[0] = gain_ * input;
outputs_[0] = b_[0] * inputs_[0] + b_[1] * inputs_[1] + b_[2] * inputs_[2];
outputs_[0] -= a_[2] * outputs_[2] + a_[1] * outputs_[1];
inputs_[2] = inputs_[1];
inputs_[1] = inputs_[0];
outputs_[2] = outputs_[1];
outputs_[1] = outputs_[0];
return outputs_[0];
}
StkFloat BiQuad :: tick( StkFloat input )
{
return this->computeSample( input );
}
StkFrames& BiQuad :: tick( StkFrames& frames, unsigned int channel )
{
return Filter::tick( frames, channel );
}