// ---------------------------------------------------------------------------
// freq_distance
// ---------------------------------------------------------------------------
// Helper function, used in formPartials().
// Returns the (positive) frequency distance between a Breakpoint
// and the last Breakpoint in a Partial.
//
inline double
PartialBuilder::freq_distance( const Partial & partial, const SpectralPeak & pk )
{
double normBpFreq = pk.frequency() / mFreqWarping->valueAt( pk.time() );
double normPartialEndFreq =
partial.last().frequency() / mFreqWarping->valueAt( partial.endTime() );
return std::fabs( normPartialEndFreq - normBpFreq );
}
// masking occurs if any (louder) peak falls
// in the frequency range delimited by fmin and fmax:
bool operator()( const SpectralPeak & v ) const
{
return ( v.frequency() > _fmin ) &&
( v.frequency() < _fmax );
}
// ---------------------------------------------------------------------------
// helpers, used below
// ---------------------------------------------------------------------------
static double accumPeakSquaredAmps( double init,
const SpectralPeak & pk )
{
return init + (pk.amplitude() * pk.amplitude());
}
// ---------------------------------------------------------------------------
// associate
// ---------------------------------------------------------------------------
// Associate bandwidth with a single SpectralPeak.
//
void
AssociateBandwidth::associate( SpectralPeak & pk )
{
pk.setBandwidth(0);
pk.addNoiseEnergy( computeNoiseEnergy( pk.frequency(), pk.amplitude() ) );
}