Android Open Source - yammp Visualizer Compat Audio F X

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License

The source code is released under:
GNU Lesser General Public License
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Java Source Code

package org.yammp.util;
//from   w  ww  . j  a  v  a2s. c  o m
import java.util.Timer;
import java.util.TimerTask;

import org.yammp.util.VisualizerWrapper.OnDataChangedListener;

import android.media.audiofx.Visualizer;
import android.os.Handler;
import android.os.Message;

public class VisualizerCompatAudioFX extends VisualizerCompat {

  private OnDataChangedListener mListener;

  private Timer mTimer;
  private boolean mWaveEnabled, mFftEnabled;
  private Visualizer mVisualizer;

  private Handler mVisualizerHandler = new Handler() {

    @Override
    public void handleMessage(Message msg) {
      switch (msg.what) {
        case WAVE_CHANGED:
          if (mListener != null) {
            byte[] wave_data = (byte[]) ((Object[]) msg.obj)[0];
            int len = (Integer) ((Object[]) msg.obj)[1];
            mListener.onWaveDataChanged(wave_data, (int) (len * accuracy), false);
          }
          break;
        case FFT_CHANGED:
          if (mListener != null) {
            byte[] fft_data = (byte[]) ((Object[]) msg.obj)[0];
            int len = (Integer) ((Object[]) msg.obj)[1];
            mListener.onFftDataChanged(fft_data, (int) (len * accuracy));
          }
          break;
      }
    }
  };

  public VisualizerCompatAudioFX(int audioSessionId, int fps) {
    super(audioSessionId, fps);
    mVisualizer = new Visualizer(audioSessionId);
    duration = 1000 / fps;
    mTimer = new Timer();
  }

  @Override
  public boolean getEnabled() {
    return mVisualizer.getEnabled();
  }

  @Override
  public void release() {
    mVisualizer.setEnabled(false);
    mVisualizer.release();

  }

  @Override
  public void setAccuracy(float accuracy) {
    if (accuracy > 1.0f || accuracy <= 0.0f)
      throw new IllegalArgumentException(
          "Invalid accuracy value! Allowed value range is \"0 < accuracy <= 1.0\"!");
    mVisualizer.setCaptureSize((int) (Visualizer.getMaxCaptureRate() * accuracy));
  }

  @Override
  public void setEnabled(boolean enabled) {
    mVisualizer.setEnabled(enabled);
    if (mTimer != null) {
      if (enabled) {
        mTimer = new Timer();
        mTimer.scheduleAtFixedRate(new VisualizerTimer(), 0, duration);
      } else {
        mTimer.cancel();
      }
    }
  }

  @Override
  public void setFftEnabled(boolean fft) {
    mFftEnabled = fft;

  }

  @Override
  public void setOnDataChangedListener(OnDataChangedListener listener) {

    mListener = listener;
  }

  @Override
  public void setWaveFormEnabled(boolean wave) {
    mWaveEnabled = wave;

  }

  private class VisualizerTimer extends TimerTask {

    @Override
    public void run() {
      byte[] wave_data = new byte[mVisualizer.getCaptureSize()];
      byte[] fft_data = new byte[mVisualizer.getCaptureSize()];
      if (mWaveEnabled) {
        int ret = Visualizer.ERROR;
        try {
          ret = mVisualizer.getWaveForm(wave_data);
        } catch (IllegalStateException e) {

        }
        if (ret == Visualizer.SUCCESS && wave_data != null) {
          Message msg = new Message();
          msg.what = WAVE_CHANGED;
          msg.obj = new Object[] { wave_data, wave_data.length };
          mVisualizerHandler.sendMessage(msg);
        }
      }
      if (mFftEnabled) {
        int ret = Visualizer.ERROR;
        try {
          ret = mVisualizer.getFft(fft_data);
        } catch (IllegalStateException e) {

        }
        if (ret == Visualizer.SUCCESS && fft_data != null) {
          Message msg = new Message();
          msg.what = FFT_CHANGED;
          msg.obj = new Object[] { fft_data, fft_data.length };
          mVisualizerHandler.sendMessage(msg);
        }
      }

    }

  }

}
Java Source Code List
