void BoomAnalyzer::transform(Scope& s) {
float* front = static_cast<float*>(&s.front());
fht_->spectrum(front);
fht_->scale(front, 1.0 / 50);
s.resize(scope_.size() <= kMaxBandCount / 2 ? kMaxBandCount / 2
: scope_.size());
}
void BoomAnalyzer::transform(Scope& s) {
float* front = static_cast<float*>(&s.front());
m_fht->spectrum(front);
m_fht->scale(front, 1.0 / 60);
Scope scope(32, 0);
const uint xscale[] = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10,
11, 12, 13, 14, 15, 16, 17, 19, 24, 29, 36,
43, 52, 63, 76, 91, 108, 129, 153, 182, 216, 255};
for (uint j, i = 0; i < 32; i++)
for (j = xscale[i]; j < xscale[i + 1]; j++)
if (s[j] > scope[i]) scope[i] = s[j];
s = scope;
}
template<class W> void
Analyzer::Base<W>::transform( Scope &scope ) //virtual
{
//this is a standard transformation that should give
//an FFT scope that has bands for pretty analyzers
//NOTE resizing here is redundant as FHT routines only calculate FHT::size() values
//scope.resize( m_fht->size() );
float *front = static_cast<float*>( &scope.front() );
float* f = new float[ m_fht->size() ];
m_fht->copy( &f[0], front );
m_fht->logSpectrum( front, &f[0] );
m_fht->scale( front, 1.0 / 20 );
scope.resize( m_fht->size() / 2 ); //second half of values are rubbish
delete [] f;
}
void NyanCatAnalyzer::transform(Scope& s) { m_fht->spectrum(&s.front()); }
void Sonogram::transform(Scope& scope) {
float* front = static_cast<float*>(&scope.front());
m_fht->power2(front);
m_fht->scale(front, 1.0 / 256);
scope.resize(m_fht->size() / 2);
}
void Rainbow::RainbowAnalyzer::transform(Scope& s) { fht_->spectrum(&s.front()); }