void Chroma::Consume(const FFTFrame &frame)
{
fill(m_features.begin(), m_features.end(), 0.0);
for (int i = m_min_index; i < m_max_index; i++) {
int note = m_notes[i];
double energy = frame.Energy(i);
if (m_interpolate) {
int note2 = note;
double a = 1.0;
if (m_notes_frac[i] < 0.5) {
note2 = (note + NUM_BANDS - 1) % NUM_BANDS;
a = 0.5 + m_notes_frac[i];
}
if (m_notes_frac[i] > 0.5) {
note2 = (note + 1) % NUM_BANDS;
a = 1.5 - m_notes_frac[i];
}
m_features[note] += energy * a;
m_features[note2] += energy * (1.0 - a);
}
else {
m_features[note] += energy;
}
}
m_consumer->Consume(m_features);
}