Android Open Source - Android_MediaCodecTest Effect View

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License

The source code is released under:
Apache License
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Java Source Code

/*
 * Copyright (C) 2013 MorihiroSoft/*from w  ww  .  ja v  a2 s.c  om*/
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package jp.morihirosoft.mediacodectest16;

import android.content.Context;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Paint;
import android.util.AttributeSet;
import android.view.SurfaceHolder;
import android.view.SurfaceView;

class EffectView extends SurfaceView implements
SurfaceHolder.Callback,
Runnable
{
  //---------------------------------------------------------------------
  // MEMBERS
  //---------------------------------------------------------------------
  private boolean       mIsResumed = false;
  private boolean       mIsCreated = false;
  private Thread        mThread    = null;
  private SurfaceHolder mHolder    = null;
  private int           mSurfaceW  = 0;
  private int           mSurfaceH  = 0;
  private int           mImageW    = 0;
  private int           mImageH    = 0;
  private int[][]       mImagePix  = null;
  private int[]         mImageIdx  = null;

  //---------------------------------------------------------------------
  // PUBLIC MRTHODS
  //---------------------------------------------------------------------
  public EffectView(Context context) {
    super(context);
    init();
  }

  public EffectView(Context context, AttributeSet attrs) {
    super(context, attrs);
    init();
  }

  public EffectView(Context context, AttributeSet attrs, int defStyle) {
    super(context, attrs, defStyle);
    init();
  }

  @Override
  public void surfaceCreated(SurfaceHolder holder) {
    mIsCreated = true;
    startThread();
  }

  @Override
  public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
    mHolder = holder;
    mSurfaceW = width;
    mSurfaceH = height;
  }

  @Override
  public void surfaceDestroyed(SurfaceHolder holder) {
    mIsCreated = false;
    stopThread();
  }

  public void setup(int image_w, int image_h, int[][] image_pix, int[] image_idx) {
    mImageW   = image_w;
    mImageH   = image_h;
    mImagePix = image_pix;
    mImageIdx = image_idx;
  }

  public void resume() {
    mIsResumed = true;
    startThread();
  }

  public void pause() {
    mIsResumed = false;
    stopThread();
  }

  public void run() {
    Canvas canvas;
    Paint paint = new Paint();

    while(mThread != null){
      if (mHolder == null || mSurfaceW < 1 || mSurfaceH < 1) {
        continue;
      }
      int idx = 0;
      try {
        synchronized (mImageIdx) {
          mImageIdx.wait();
          idx = mImageIdx[0];
        }
      } catch (InterruptedException e) {
        e.printStackTrace();
        throw new RuntimeException();
      }

      canvas = mHolder.lockCanvas();
      if (canvas == null) {
        continue;
      }

      canvas.drawColor(Color.GRAY);

      float s;
      if (mSurfaceW * mImageH < mSurfaceH * mImageW) {
        s = (float)mSurfaceW / (float)mImageW;
      } else {
        s = (float)mSurfaceH / (float)mImageH;
      }
      canvas.scale(s, s);
      canvas.drawBitmap(mImagePix[idx], 0, mImageW, 0, 0, mImageW, mImageH, false, paint);

      mHolder.unlockCanvasAndPost(canvas);
    }
  }

  //---------------------------------------------------------------------
  // PRIVATE...
  //---------------------------------------------------------------------
  private void init() {
    getHolder().addCallback(this);
  }

  private void startThread() {
    if (mIsCreated && mIsResumed && mThread == null) {
      mThread = new Thread(this);
      mThread.start();
    }
  }

  private void stopThread() {
    if (mThread != null) {
      mThread = null;
    }
  }
}
Java Source Code List
