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

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