// default signal processing method is called 'perform'
void perform(double **ins, long numins, double **outs, long numouts, long sampleframes) {
//
char *this_chordname;
std::vector<double> chroma;
chroma.resize(12);
double rms, rms_tot;
int q;
rms = 0;
rms_tot = 0;
for (long channel = 0; channel < numouts; channel++) {
double * in = ins[channel];
double * out = outs[channel];
for (long i=0; i < sampleframes; i++) {
out[i] = in[i];
// we only want to process on channel 0
if (channel == 0) {
if (currentsamples < frameSize - 1) {
frame[currentsamples] = in[i];
currentsamples++;
}
else {
currentsamples = 0;
for (q = 0; q < frameSize; q++) {
rms_tot += pow(frame[q],2);
}
rms = rms_tot / frameSize;
if (rms > rms_cutoff){
c.processAudioFrame(frame);
outlet_int(m_outlets[3], 1);
}
else {
outlet_int(m_outlets[3], 0);
}
if (c.isReady()) {
std::vector<double> chroma = c.getChromagram();
chordspotter.detectChord(chroma);
currentchord = 10000 * chordspotter.rootNote + chordspotter.chord_num;
chord_name = chordspotter.chord_name;
const char *this_chordname = chord_name.c_str();
if (currentchord != lastchord) {
outlet_anything(m_outlets[0], gensym(this_chordname), 0, NULL);
outlet_int(m_outlets[1], currentchord);
midilist(chordspotter.rootNote, chordspotter.chord_num);
}
lastchord = currentchord;
}
}
}
}
}
}
const double PitchDetector::detectChord(SamplesNode * pSamplesNode)
{
int frameSize = pSamplesNode->sampleSize;
int sampleRate = 44100;
_chromagram.setInputAudioFrameSize(frameSize);
_chromagram.setSamplingFrequency(sampleRate);
_chromagram.processAudioFrame (pSamplesNode->samples);
if (_chromagram.isReady())
{
std::vector<double> chroma = _chromagram.getChromagram();
// do something with the chromagram here
ChordDetector chordDetector;
chordDetector.detectChord (chroma);
chordDetector.rootNote;
chordDetector.quality;
chordDetector.intervals;
}
return 0;
}
