public static List<Double> audioAnalysis(
String deviceName, String channel, long averages, NodeContext context) {
AudioSource source = (AudioSource) context.getData().get(deviceName + ".source");
if (source == null) return ImmutableList.of();
FFT fft = new FFT(source.bufferSize(), source.sampleRate());
fft.window(FFT.HANN);
if (averages > 0) fft.linAverages((int) averages);
if (channel.equals("left")) {
fft.forward(source.left);
} else if (channel.equals("right")) {
fft.forward(source.right);
} else {
fft.forward(source.mix);
}
ImmutableList.Builder<Double> b = new ImmutableList.Builder<Double>();
if (averages == 0) {
for (int i = 0; i < fft.specSize(); i++) b.add((double) fft.getBand(i));
} else {
for (int i = 0; i < fft.avgSize(); i++) b.add((double) fft.getAvg(i));
}
return b.build();
}
public void fftLogUpdate() {
fftThreshold = Constants.FFT_THRESHOLD;
for (int i = 0; i < getFftLog().avgSize(); i++) {
fftPrev[i] = getFftLog().getAvg(i);
}
getFftLog().forward(song.mix);
largeAmp = getFftLog().getAvg(0);
largeBand = 0;
for (int i = 0; i < getFftLog().avgSize(); i++) {
fftDiff[i] = getFftLog().getAvg(i) - fftPrev[i];
if (fftDiff[i] >= fftThreshold) {
beats[i] = true;
} else {
beats[i] = false;
}
if (fft.getAvg(i) > largeAmp) {
largeAmp = getFftLog().getAvg(i);
largeBand = i;
}
}
if (enemiesGenned > 0) {
consecFramesGenned++;
} else if (enemiesGenned == 0) {
consecFramesGenned--;
if (consecFramesGenned < 0) {
consecFramesGenned = 0;
}
}
// System.out.println("EnemiesGenned: " + enemiesGenned + " consecFrames: " +
// consecFramesGenned);
if (consecFramesGenned == 0 && Constants.FFT_THRESHOLD > Constants.FFT_THRESHOLD_MIN) {
Constants.FFT_THRESHOLD--;
// System.out.println("FFT Minus: "+Constants.FFT_THRESHOLD);
}
if (consecFramesGenned >= 2 && Constants.FFT_THRESHOLD < Constants.FFT_THRESHOLD_MAX) {
Constants.FFT_THRESHOLD++;
// System.out.println("FFT Plus: "+Constants.FFT_THRESHOLD);
}
}
public static List<Double> audioLogAvg(
String deviceName, String channel, long baseFreq, long bandsPerOctave, NodeContext context) {
AudioSource source = (AudioSource) context.getData().get(deviceName + ".source");
if (source == null) return ImmutableList.of();
FFT fft = new FFT(source.bufferSize(), source.sampleRate());
fft.window(FFT.HANN);
fft.logAverages((int) baseFreq, (int) bandsPerOctave);
if (channel.equals("left")) {
fft.forward(source.left);
} else if (channel.equals("right")) {
fft.forward(source.right);
} else {
fft.forward(source.mix);
}
ImmutableList.Builder<Double> b = new ImmutableList.Builder<Double>();
for (int i = 0; i < fft.avgSize(); i++) b.add((double) fft.getAvg(i));
return b.build();
}
