SpectrogramSample.java

package org.gennai.audio_analyzer.analysis;

import java.io.IOException;

import javax.sound.sampled.LineUnavailableException;
import javax.sound.sampled.UnsupportedAudioFileException;

import org.gennai.audio_analyzer.analysis.AudioTest.Audio;
import org.gennai.audio_analyzer.analysis.audio.AudioSamples;
import org.gennai.audio_analyzer.analysis.config.FingerprintConfig;
import org.gennai.audio_analyzer.analysis.fft.SpectrumService;
import org.gennai.audio_analyzer.analysis.fft.SpectrumService.Mode;

public class SpectrogramSample {

  public static void main(String[] args)
      throws UnsupportedAudioFileException, IOException, LineUnavailableException {
    FingerprintConfig fingerprintConfig = new FingerprintConfig();

    SpectrumService spectrumService = new SpectrumService();

    // WAVEファイル読み込み
    Audio audio = AudioTest.readWave("../samples4/nom1.wav");

    AudioSamples audioSamples = new AudioSamples(audio.getData(), audio.getOrigin(),
        (int) audio.getFormat().getSampleRate());

    // complex 算出
    double[][] spectrogram = spectrumService.spectrogram(audioSamples, Mode.COMPLEX,
        fingerprintConfig.getSpectrogramConfig());
    System.out.println(spectrogram.length + " / " + spectrogram[0].length);

    // Logarithmic Frequency Spectrum 算出
    spectrogram = spectrumService.spectrogram(audioSamples, Mode.LOGARITHMIC,
        fingerprintConfig.getSpectrogramConfig());
    System.out.println(spectrogram.length + " / " + spectrogram[0].length);

    // magnitude 算出
    spectrogram = spectrumService.spectrogram(audioSamples, Mode.MAGNITUDE,
        fingerprintConfig.getSpectrogramConfig());
    System.out.println(spectrogram.length + " / " + spectrogram[0].length);

    // Power spectral density 算出
    spectrogram = spectrumService.spectrogram(audioSamples, Mode.PSD,
        fingerprintConfig.getSpectrogramConfig());
    System.out.println(spectrogram.length + " / " + spectrogram[0].length);
  }
}