void *meter_oksize(t_meter *x, t_rect *newrect)
{
TTLimit(newrect->width, kWidthMinimum, kWidthMaximum);
TTLimit(newrect->height, kHeightMinimum, kHeightMaximum);
meterCacheSurface(x); // Now draw the gradient and cache it in our surface
return (void*)1;
}
TTErr GaussWindow::calculateValue(const TTFloat64& x, TTFloat64& y, TTPtrSizedInt data)
{
TTFloat64 superscript = -0.5 * pow( ( (2. * x) - 1. ) / mSigma, 2 );
y = exp(superscript);
TTLimit(y, 0.0, 1.0 ); // just in case
return kTTErrNone;
}
TTErr TTBalance::setFrequency(const TTValue& newValue)
{
mFrequency = (double)newValue;
TTLimit(mFrequency, 1., (sr*0.45));
c = 1 / ( tan( kTTPi*(mFrequency/sr) ) );
a0 = 1 / (1 + kTTSqrt2*c + c*c);
a1 = 2*a0;
a2 = a0;
b1 = 2*a0*( 1 - c*c );
b2 = a0 * (1 - kTTSqrt2*c + c*c);
return kTTErrNone;
}
TTErr TrapezoidWindow::calculateValue(const TTFloat64& x, TTFloat64& y, TTPtrSizedInt data)
{
TTFloat64 twoOverAlpha = 2. / mAlpha;
TTFloat64 alphaOverTwo = mAlpha / 2.;
if ( x < alphaOverTwo ) { // attack portion
y = x * twoOverAlpha;
} else if ( x > ( 1 - alphaOverTwo ) ) { // release portion
y = (1 - x) * twoOverAlpha;
} else { // sustain portion
y = 1.;
}
TTLimit(y, 0.0, 1.0 );
return kTTErrNone;
}
TTErr TukeyWindow::calculateValue(const TTFloat64& x, TTFloat64& y, TTPtrSizedInt data)
{
TTFloat64 twoOverAlpha = 2. / mAlpha;
TTFloat64 alphaOverTwo = mAlpha / 2.;
if ( x < alphaOverTwo ) { // attack portion
y = 0.5 * (1 + cos( kTTPi * ((twoOverAlpha * x) - 1)));
} else if ( x > ( 1 - alphaOverTwo) ) { // release portion
y = 0.5 * (1 + cos( kTTPi * ((twoOverAlpha * x) - twoOverAlpha + 1)));
} else { // sustain portion
y = 1.;
}
TTLimit(y, 0.0, 1.0 ); // just in case
return kTTErrNone;
}
