使用SurfaceView播放RGB原始视频-2016.01.22

 

1 程序代码

使用Android中的SurfaceView播放RGB视频数据，SufaceView播放代码如下：

package com.zhoulee.surfaceviewdemo;

import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.nio.ByteBuffer;

import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.Bitmap.Config;
import android.graphics.Canvas;
import android.graphics.Color;
import android.graphics.Rect;
import android.util.Log;
import android.view.SurfaceHolder;
import android.view.SurfaceView;

public class MySurfaceView extends SurfaceView implements
        SurfaceHolder.Callback
{
    private static String TAG = "MySurfaceView";
    private static String RGB_FILE_NAME = "/data/video/bxjg_352x288.rgba";
    private static int PICTURE_WIDTH = 352;
    private static int PICTURE_HEIGHT = 288;
    private  static int PICTURE_SIZE = PICTURE_WIDTH * PICTURE_HEIGHT * 4;
    private  Rect m_srcRect;
    private  Rect m_dstRect;
    private SurfaceHolder m_surfaceHolder;
    private boolean m_flag;
    private Canvas m_canvas;
    private FileInputStream m_fileInputStream;
    
    byte [] m_pixel = new byte[PICTURE_SIZE];
    
    private Thread m_thread = new Thread(new Runnable()
    {
        @Override
        public void run() {
            while(m_flag)
            {
                m_canvas = m_surfaceHolder.lockCanvas();                
                m_canvas.drawColor(Color.BLACK);
                
                try {
                    if(-1 == m_fileInputStream.read(m_pixel))
                    {
                        break;
                    }
                } catch (IOException e1) {
                    e1.printStackTrace();
                }
                
                ByteBuffer buffer = ByteBuffer.wrap(m_pixel);
                
                Bitmap videoBitmap = Bitmap.createBitmap(PICTURE_WIDTH, PICTURE_HEIGHT, Config.ARGB_8888);
                
                videoBitmap.copyPixelsFromBuffer(buffer);
                
                m_canvas.drawBitmap(videoBitmap, m_srcRect, m_dstRect, null);
                             
                if(m_canvas != null)
                {
                    m_surfaceHolder.unlockCanvasAndPost(m_canvas);
                }
                
                try
                {
                    Thread.sleep(5);
                }
                catch(InterruptedException e)
                {
                    e.printStackTrace();
                }
            }
        }
    });

    public MySurfaceView(Context context) {
        super(context);
        Log.i(TAG, "MySurfaceView Constructor");
        m_flag = false;
        m_surfaceHolder = this.getHolder();
        m_surfaceHolder.addCallback(this);
        m_srcRect = new Rect(0, 0, PICTURE_WIDTH, PICTURE_HEIGHT);
        m_dstRect = new Rect(800, 50, 800 + PICTURE_WIDTH, 50 + PICTURE_HEIGHT);
    }

    @Override
    public void surfaceCreated(SurfaceHolder holder) {
        Log.i(TAG, "surfaceCtreated");
        m_flag = true;
        try {
            m_fileInputStream = new FileInputStream(RGB_FILE_NAME);
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        }
        m_thread.start();
    }

    @Override
    public void surfaceChanged(SurfaceHolder holder, int format, int width,
            int height) {
        Log.i(TAG, "surfaceChanged");
    }

    @Override
    public void surfaceDestroyed(SurfaceHolder holder) {
        Log.i(TAG, "surfaceDestroyed");
        m_flag = false;
    }
}

入口Activity代码如下：

package com.zhoulee.surfaceviewdemo;

import android.app.Activity;
import android.os.Bundle;

public class SurfaceViewDemoActivity extends Activity {

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(new MySurfaceView(this));
    }
}

2 参考资料

How to load RGB565 buffer to ImageView

android显示RGB565数据图像

Android图形系统之Surface、SurfaceView、SurfaceHolder及SurfaceHolder.Callback之间的联系