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