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improved spectrum sampling

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Raybz@Raybz 2013-06-13 09:36:37 +02:00
parent 02afe42cd9
commit 153452d10e
1 changed files with 6 additions and 3 deletions
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7
AudioProcessing/src/main/java/org/wyrez/audio/AudioProcessor.java
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@ -30,7 +30,7 @@ import org.wyrez.audio.util.SampleBuffer;
import org.wyrez.audio.util.SampleHelper; import org.wyrez.audio.util.SampleHelper;
/** /**
*Processor to create analysis-data of audio samples * Processor to create analysis-data of audio samples
* *
* @author Darth Affe * @author Darth Affe
*/ */
@ -191,12 +191,15 @@ public class AudioProcessor {
System.arraycopy(spectrumBuffer, 0, lastSpectrumBuffer, 0, spectrumBuffer.length); System.arraycopy(spectrumBuffer, 0, lastSpectrumBuffer, 0, spectrumBuffer.length);
System.arraycopy(fft.getSpectrum(band), 0, spectrumBuffer, 0, spectrumBuffer.length); System.arraycopy(fft.getSpectrum(band), 0, spectrumBuffer, 0, spectrumBuffer.length);
float spectrumAvg = 0;
float flux = 0; float flux = 0;
for (int j = 0; j < spectrumBuffer.length; j++) { for (int j = 0; j < spectrumBuffer.length; j++) {
spectrum.add(spectrumBuffer[j]); spectrumAvg += spectrumBuffer[j];
float value = (spectrumBuffer[j] - lastSpectrumBuffer[j]); float value = (spectrumBuffer[j] - lastSpectrumBuffer[j]);
flux += value < 0 ? 0 : value; flux += value < 0 ? 0 : value;
} }
spectrumAvg /= spectrumBuffer.length;
spectrum.add(spectrumAvg);
spectralFlux.add(flux); spectralFlux.add(flux);
} }
this.spectralFlux = SampleHelper.convertToFloatArray(spectralFlux); this.spectralFlux = SampleHelper.convertToFloatArray(spectralFlux);