Vespula/note.cpp at master · noah-black/Vespula · GitHub

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#include "note.h"
#include <stdio.h>

Note::Note(Oscillator *oscillator, Envelope *envelope, double freq,
           enum note baseNote, double velocity)
    : envelope(envelope) {
  this->oscillator = oscillator;
  this->freq = freq;
  this->baseNote = baseNote;
  this->velocity = velocity;
  state = held;
  period = SAMPLE_RATE / freq;
  samplesElapsed = 0;
  releaseSample = -1;
  killCounter = 0;
  killed = false;
}

Note::~Note() {
  delete oscillator;
  std::vector<EnvelopeConnection *>::iterator it;
  for (it = envelopeConnections.begin(); it != envelopeConnections.end(); ++it)
    delete (*it);
  std::vector<SoundEffect *>::iterator eit;
  for (eit = noteEffects.begin(); eit != noteEffects.end(); ++eit)
    delete (*eit);
}

void Note::setFreq(double freq) {
  this->freq = freq;
  period = SAMPLE_RATE / freq;
  oscillator->setFreq(freq);
}

int Note::getSamplesElapsed() { return samplesElapsed; }

double Note::getFreq() { return freq; }

enum note Note::getNote() { return baseNote; }

void Note::setNote(enum note baseNote) { this->baseNote = baseNote; }

int Note::getReleaseSample() { return releaseSample; }

void Note::setReleaseSample(int releaseSample) {
  this->releaseSample = releaseSample;
}

void Note::release() {
  if (state == released)
    return;
  state = released;
  releaseSample = samplesElapsed;
}

bool Note::isReleased() { return state == released; }

bool Note::isDead() {
  if (killed && killCounter > killTime) {
    return true;
  }
  if (state != released)
    return false;
  return envelope->isDead(samplesElapsed, releaseSample);
}

void Note::advance() {
  std::vector<EnvelopeConnection *>::const_iterator iter;
  for (iter = envelopeConnections.begin(); iter != envelopeConnections.end();
       ++iter) {
    isReleased() ? (*iter)->notify(samplesElapsed, releaseSample, velocity)
                 : (*iter)->notify(samplesElapsed, velocity);
  }
  samplesElapsed++;
  if (state != released && releaseSample > -1 &&
      samplesElapsed > releaseSample) {
    state = released;
  }
}

double Note::getSample() {
  double levelEnvelope, sample;
  levelEnvelope = (state == released)
                      ? envelope->getFactor(samplesElapsed, releaseSample)
                      : envelope->getFactor(samplesElapsed);
  sample = oscillator->getSample() * levelEnvelope * velocity;
  if (killed) {
    sample =
        killTime == 0
            ? 0
            : sample * ((double)(killTime - killCounter) / (double)killTime);
    killCounter++;
  }
  for (std::vector<SoundEffect *>::iterator it = noteEffects.begin();
       it != noteEffects.end(); ++it) {
    sample = (*it)->getSample(sample);
  }
  advance();
  return sample;
}

void Note::addEnvelopeConnection(EnvelopeConnection *envelopeConnection) {
  envelopeConnections.push_back(envelopeConnection);
}

Oscillator *Note::getOscillator() { return oscillator; }

void Note::kill(int killTime) {
  this->killTime = killTime;
  killed = true;
}

bool Note::isKilled() { return killed; }

void Note::setWaveform(waveformType waveform) {
  oscillator->setWaveform(waveform);
}

void Note::addNoteEffect(SoundEffect *effect) { noteEffects.push_back(effect); }