Android Open Source - FPlayAndroid Simple Visualizer Jni

From Project

Back to project page FPlayAndroid.
License

The source code is released under:
Copyright (c) 2013-2014, Carlos Rafael Gimenes das Neves All rights reserved. Redistribution and use in source and binary forms, with or without modification, are permitted provided that the followin...
If you think the Android project FPlayAndroid listed in this page is inappropriate, such as containing malicious code/tools or violating the copyright, please email info at java2s dot com, thanks.
Java Source Code

//
// FPlayAndroid is distributed under the FreeBSD License
///*from w w  w  . ja v a  2s . co m*/
// Copyright (c) 2013-2014, Carlos Rafael Gimenes das Neves
// All rights reserved.
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice, this
//    list of conditions and the following disclaimer.
// 2. Redistributions in binary form must reproduce the above copyright notice,
//    this list of conditions and the following disclaimer in the documentation
//    and/or other materials provided with the distribution.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
// ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
// ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
// ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
//
// The views and conclusions contained in the software and documentation are those
// of the authors and should not be interpreted as representing official policies,
// either expressed or implied, of the FreeBSD Project.
//
// https://github.com/carlosrafaelgn/FPlayAndroid
//
package br.com.carlosrafaelgn.fplay.visualizer;

import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.graphics.Bitmap;
import android.graphics.Point;
import android.view.ContextMenu;
import android.view.MenuItem;
import android.view.Surface;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.view.ViewDebug.ExportedProperty;

import java.util.Arrays;

import br.com.carlosrafaelgn.fplay.R;
import br.com.carlosrafaelgn.fplay.list.Song;
import br.com.carlosrafaelgn.fplay.ui.UI;
import br.com.carlosrafaelgn.fplay.ui.drawable.TextIconDrawable;
import br.com.carlosrafaelgn.fplay.util.SlimLock;

public final class SimpleVisualizerJni extends SurfaceView implements SurfaceHolder.Callback, Visualizer, VisualizerView, MenuItem.OnMenuItemClickListener {
  private static final int MNU_COLOR = MNU_VISUALIZER + 1, MNU_LORES = MNU_VISUALIZER + 2, MNU_HIRES = MNU_VISUALIZER + 3, MNU_VOICEPRINT = MNU_VISUALIZER + 4;
  
  static {
    System.loadLibrary("SimpleVisualizerJni");
  }

  static native void commonSetSpeed(int speed);
  static native void commonSetColorIndex(int colorIndex);
  static native int commonCheckNeonMode();
  static native void commonUpdateMultiplier(boolean isVoice);
  static native int commonProcess(byte[] bfft, int deltaMillis, int bt);

  private static native void setLerp(boolean lerp);
  private static native void init(int bgColor);
  private static native void terminate();
  private static native int prepareSurface(Surface surface);
  private static native void process(byte[] bfft, int deltaMillis, Surface surface);
  private static native void processVoice(byte[] bfft, Surface surface);

  static native int glOnSurfaceCreated(int bgColor, int type);
  static native void glOnSurfaceChanged(int width, int height);
  static native int glLoadBitmapFromJava(Bitmap bitmap);
  static native void glDrawFrame();
  static native void glReleaseView();

  private byte[] bfft;
  private final SlimLock lock;
  private Point point;
  private SurfaceHolder surfaceHolder;
  private int state, colorIndex;
  private boolean lerp, voice;
  private Surface surface;
  
  public SimpleVisualizerJni(Context context, Activity activity, boolean landscape, Intent extras) {
    super(context);
    bfft = new byte[2048];
    init(UI.color_visualizer565);
    lock = new SlimLock();
    point = new Point();
    setClickable(true);
    setFocusable(false);
    surfaceHolder = getHolder();
    surfaceHolder.addCallback(this);
    state = 0;
    colorIndex = 0;
    lerp = false;
    voice = false;
    setLerp(lerp);
    commonSetColorIndex(colorIndex);
  }
  
  @Override
  @ExportedProperty(category = "drawing")
  public final boolean isOpaque() {
    return true;
  }
  
  @Override
  public boolean onMenuItemClick(MenuItem item) {
    switch (item.getItemId()) {
    case MNU_COLOR:
      colorIndex = ((colorIndex == 0) ? 257 : 0);
      break;
    case MNU_LORES:
      lerp = false;
      voice = false;
      state = 0;
      break;
    case MNU_HIRES:
      lerp = true;
      voice = false;
      state = 1;
      break;
    case MNU_VOICEPRINT:
      lerp = false;
      voice = true;
      state = 2;
      break;
    }
    if (item.getItemId() != MNU_COLOR)
      commonUpdateMultiplier(voice);
    setLerp(lerp);
    commonSetColorIndex(colorIndex);
    return true;
  }
  
  //Runs on the MAIN thread
  @Override
  public VisualizerView getView() {
    return this;
  }

  //Runs on the MAIN thread
  public void onActivityResult(int requestCode, int resultCode, Intent data) {
  }

  //Runs on the MAIN thread
  @Override
  public void onCreateContextMenu(ContextMenu menu) {
    UI.separator(menu, 1, 0);
    menu.add(1, MNU_COLOR, 1, (colorIndex == 0) ? R.string.green : R.string.blue)
      .setOnMenuItemClickListener(this)
      .setIcon(new TextIconDrawable(UI.ICON_THEME));
    UI.separator(menu, 1, 2);
    menu.add(2, MNU_LORES, 0, "LoRes")
      .setOnMenuItemClickListener(this)
      .setIcon(new TextIconDrawable((!voice && !lerp) ? UI.ICON_RADIOCHK : UI.ICON_RADIOUNCHK));
    menu.add(2, MNU_HIRES, 1, "HiRes")
      .setOnMenuItemClickListener(this)
      .setIcon(new TextIconDrawable(lerp ? UI.ICON_RADIOCHK : UI.ICON_RADIOUNCHK));
    menu.add(2, MNU_VOICEPRINT, 2, "VoicePrint")
      .setOnMenuItemClickListener(this)
      .setIcon(new TextIconDrawable(voice ? UI.ICON_RADIOCHK : UI.ICON_RADIOUNCHK));
  }
  
  //Runs on the MAIN thread
  @Override
  public void onClick() {
    switch (state) {
    case 0:
      lerp = true;
      voice = false;
      state = 1;
      break;
    case 1:
      lerp = false;
      voice = true;
      state = 2;
      break;
    default:
      lerp = false;
      voice = false;
      state = 0;
      break;
    }
    commonUpdateMultiplier(voice);
    setLerp(lerp);
    commonSetColorIndex(colorIndex);
  }

  //Runs on the MAIN thread
  @Override
  public void onPlayerChanged(Song currentSong, boolean songHasChanged, Throwable ex) {
  }

  //Runs on the MAIN thread (returned value MUST always be the same)
  @Override
  public boolean requiresScreen() {
    return true;
  }

  //Runs on ANY thread (returned value MUST always be the same)
  @Override
  public int getDesiredPointCount() {
    return 1024;
  }

  //Runs on a SECONDARY thread
  @Override
  public void load(Context context) {
    commonCheckNeonMode();
  }
  
  //Runs on ANY thread
  @Override
  public boolean isLoading() {
    return false;
  }
  
  //Runs on ANY thread
  @Override
  public void cancelLoading() {
    
  }
  
  //Runs on the MAIN thread
  @Override
  public void configurationChanged(boolean landscape) {
    
  }
  
  //Runs on a SECONDARY thread
  @Override
  public void processFrame(android.media.audiofx.Visualizer visualizer, boolean playing, int deltaMillis) {
    if (!lock.lockLowPriority())
      return;
    try {
      if (surface != null) {
        //WE MUST NEVER call any method from visualizer
        //while the player is not actually playing
        if (!playing)
          Arrays.fill(bfft, 0, 1024, (byte)0);
        else
          visualizer.getFft(bfft);
        if (!voice)
          process(bfft, deltaMillis, surface);
        else
          processVoice(bfft, surface);
      }
    } finally {
      lock.releaseLowPriority();
    }
  }
  
  //Runs on a SECONDARY thread
  @Override
  public void release() {
    bfft = null;
    terminate();
  }
  
  //Runs on the MAIN thread (returned value MUST always be the same)
  @Override
  public boolean isFullscreen() {
    return false;
  }
  
  //Runs on the MAIN thread (called only if isFullscreen() returns false)
  public Point getDesiredSize(int availableWidth, int availableHeight) {
    point.x = ((availableWidth > availableHeight) ? ((availableWidth * 7) >> 3) : availableWidth) >> 8;
    point.y = ((availableWidth < availableHeight) ? availableWidth : availableHeight) >> 1;
    if (point.x < 1)
      point.x = 1;
    point.x <<= 8;
    if (point.x > availableWidth)
      point.x = availableWidth;
    point.y &= (~1); //make y always an even number
    return point;
  }
  
  //Runs on the MAIN thread (AFTER Visualizer.release())
  @Override
  public void releaseView() {
    if (surfaceHolder != null) {
      surfaceHolder.removeCallback(this);
      surfaceHolder = null;
    }
    surface = null;
    point = null;
    terminate();
  }
  
  @Override
  public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
    lock.lockHighPriority();
    surface = null;
    if (surfaceHolder != null) {
      surface = surfaceHolder.getSurface();
      if (surface != null) {
        if (prepareSurface(surface) < 0)
          surface = null;
      }
    }
    lock.releaseHighPriority();
  }
  
  @Override
  public void surfaceCreated(SurfaceHolder holder) {
    
  }
  
  @Override
  public void surfaceDestroyed(SurfaceHolder holder) {
    lock.lockHighPriority();
    surface = null;
    lock.releaseHighPriority();
  }
}
Java Source Code List
