相关完整源码可以从这里下载到: http://bbs.rosoo.net/forum.php?mod=viewthread&tid=8669 2010-10-13晚上 更新~ 将之前做过的一个比较实用的在Android实时采集视频,并在PC上显示出采集到的视频的程序,包括PC端和Android端程序,基于Android 1.5 在HTC G3上测试通过。代码在分界线之后。
之前网上找了很多资料,没有找到如何截取Android视频流。后来发现在Android的拍照视频预览时就可以截取视频数据。每获得一帧就调用一下接口函数。 我的开发平台是Android 1.5,这个程序实现视频流的获取,程序简单地在第20帧到来的时候,写入到文件中。这样就可以拿到电脑上进行分析。 具体请大家参考代码 package com.sunshine; import java.io.File; import java.io.RandomAccessFile; import android.app.Activity; import android.content.res.Configuration; import android.graphics.PixelFormat; import android.hardware.Camera; import android.os.Bundle; import android.util.Log; import android.view.SurfaceHolder; import android.view.SurfaceView; import android.view.Window; import android.view.WindowManager; import android.view.SurfaceHolder.Callback; public class AndroidVideo extends Activity implements Callback, Camera.PictureCallback { private SurfaceView mSurfaceView = null; private SurfaceHolder mSurfaceHolder = null; private Camera mCamera = null; private boolean mPreviewRunning = false; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); getWindow().setFormat(PixelFormat.TRANSLUCENT); requestWindowFeature(Window.FEATURE_NO_TITLE); getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN); setContentView(R.layout.main); mSurfaceView = (SurfaceView) this.findViewById(R.id.surface_camera); mSurfaceHolder = mSurfaceView.getHolder(); mSurfaceHolder.addCallback(this); mSurfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS); } @Override public void onPictureTaken(byte[] data, Camera camera) { try { Log.v("System.out", "get it!"); File file = new File("/sdcard/camera.jpg"); RandomAccessFile raf = new RandomAccessFile(file, "rw"); raf.write(data); raf.close(); } catch (Exception ex) { Log.v("System.out", ex.toString()); } } @Override public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) { if (mPreviewRunning) { mCamera.stopPreview(); } Camera.Parameters p = mCamera.getParameters(); p.setPreviewSize(width, height); mCamera.setPreviewCallback(new StreamIt()); mCamera.setParameters(p); try { mCamera.setPreviewDisplay(holder); } catch (Exception ex) { } mCamera.startPreview(); mPreviewRunning = true; } @Override public void surfaceCreated(SurfaceHolder holder) { mCamera = Camera.open(); } @Override public void surfaceDestroyed(SurfaceHolder holder) { mCamera.stopPreview(); mPreviewRunning = false; mCamera.release(); } @Override public void onConfigurationChanged(Configuration newConfig) { try { super.onConfigurationChanged(newConfig); if (this.getResources().getConfiguration().orientation == Configuration.ORIENTATION_LANDSCAPE) { } else if (this.getResources().getConfiguration().orientation == Configuration.ORIENTATION_PORTRAIT) { } } catch (Exception ex) { } } } class StreamIt implements Camera.PreviewCallback { private int tick = 1; @Override public void onPreviewFrame(byte[] data, Camera camera) { // TODO Auto-generated method stub if (tick == 20) { System.out.println("data len: " + data.length); try { File file = new File("/sdcard/pal.pal"); if (!file.exists()) file.createNewFile(); RandomAccessFile raf = new RandomAccessFile(file, "rw"); raf.write(data); raf.close(); tick++; } catch (Exception ex) { Log.v("System.out", ex.toString()); } } tick++; } } xml 布局文件 <?xml version="1.0" encoding="utf-8"?> <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android" android:layout_width="fill_parent" android:layout_height="fill_parent" android:orientation="vertical"> <SurfaceView android:id="@+id/surface_camera" android:layout_width="fill_parent" android:layout_height="fill_parent"> </SurfaceView> </LinearLayout> 注意在项目配置文件中还要加上访问权限 <uses-permission android:name="android.permission.CAMERA" /> 通过查资料发现,Android每帧的数据流的格式是YUV420 下面附上一个将 YUV420转成RGB的函数,
- staticpublicvoiddecodeYUV420SP(byte[] rgbBuf,byte[] yuv420sp,intwidth,intheight) {
- finalintframeSize = width * height;
- if(rgbBuf ==null)
- thrownewNullPointerException("buffer 'rgbBuf' is null");
- if(rgbBuf.length < frameSize *3)
- thrownewIllegalArgumentException("buffer 'rgbBuf' size "
- + rgbBuf.length +" < minimum "+ frameSize *3);
-
- if(yuv420sp ==null)
- thrownewNullPointerException("buffer 'yuv420sp' is null");
-
- if(yuv420sp.length < frameSize *3/2)
- thrownewIllegalArgumentException("buffer 'yuv420sp' size "+ yuv420sp.length
- +" < minimum "+ frameSize *3/2);
-
- inti =0, y =0;
- intuvp =0, u =0, v =0;
- inty1192 =0, r =0, g =0, b =0;
-
- for(intj =0, yp =0; j < height; j++) {
- uvp = frameSize + (j >>1) * width;
- u =0;
- v =0;
- for(i =0; i < width; i++, yp++) {
- y = (0xff& ((int) yuv420sp[yp])) -16;
- if(y <0) y =0;
- if((i &1) ==0) {
- v = (0xff& yuv420sp[uvp++]) -128;
- u = (0xff& yuv420sp[uvp++]) -128;
- }
-
- y1192 =1192* y;
- r = (y1192 +1634* v);
- g = (y1192 -833* v -400* u);
- b = (y1192 +2066* u);
-
- if(r <0) r =0;elseif(r >262143) r =262143;
- if(g <0) g =0;elseif(g >262143) g =262143;
- if(b <0) b =0;elseif(b >262143) b =262143;
-
- rgbBuf[yp *3] = (byte)(r >>10);
- rgbBuf[yp *3+1] = (byte)(g >>10);
- rgbBuf[yp *3+2] = (byte)(b >>10);
- }
- }
- }
代码来自http://chenweihuacwh.javaeye.com/blog/571223 感谢cwh643 -----------------------------分界线------------------------------------------- -----------------------------2010-10-13更新------------------------------- Android 端 package com.sunshine;
import java.io.DataInputStream; import java.io.DataOutputStream; import java.net.Socket;
import android.app.Activity; import android.content.res.Configuration; import android.graphics.PixelFormat; import android.hardware.Camera; import android.os.Bundle; import android.view.SurfaceHolder; import android.view.SurfaceView; import android.view.View; import android.view.Window; import android.view.WindowManager; import android.view.SurfaceHolder.Callback; import android.view.View.OnClickListener; import android.widget.Button; import android.widget.EditText;
public class AndroidVideo extends Activity implements Callback,OnClickListener{ private SurfaceView mSurfaceView = null; private SurfaceHolder mSurfaceHolder = null; private Camera mCamera = null; private boolean mPreviewRunning = false;
//连接相关 private EditText remoteIP=null; private Button connect=null; private String remoteIPStr=null;
//视频数据 private StreamIt streamIt=null; public static Kit kit=null; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState);
getWindow().setFormat(PixelFormat.TRANSLUCENT); requestWindowFeature(Window.FEATURE_NO_TITLE); getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, WindowManager.LayoutParams.FLAG_FULLSCREEN);
setContentView(R.layout.main);
mSurfaceView = (SurfaceView) this.findViewById(R.id.surface_camera); mSurfaceHolder = mSurfaceView.getHolder(); mSurfaceHolder.addCallback(this); mSurfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
remoteIP=(EditText)this.findViewById(R.id.remoteIP); connect=(Button)this.findViewById(R.id.connect); connect.setOnClickListener(this);
}
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) { if (mPreviewRunning) { mCamera.stopPreview(); } Camera.Parameters p = mCamera.getParameters(); p.setPreviewSize(width, height); streamIt=new StreamIt(); kit=new Kit(); mCamera.setPreviewCallback(streamIt);
mCamera.setParameters(p); try { mCamera.setPreviewDisplay(holder); } catch (Exception ex) { } mCamera.startPreview(); mPreviewRunning = true; }
public void surfaceCreated(SurfaceHolder holder) { mCamera = Camera.open(); }
public void surfaceDestroyed(SurfaceHolder holder) { mCamera.stopPreview(); mPreviewRunning = false; mCamera.release(); }
@Override public void onConfigurationChanged(Configuration newConfig) { try { super.onConfigurationChanged(newConfig); if (this.getResources().getConfiguration().orientation == Configuration.ORIENTATION_LANDSCAPE) { } else if (this.getResources().getConfiguration().orientation == Configuration.ORIENTATION_PORTRAIT) { } } catch (Exception ex) { } }
class Kit implements Runnable { private boolean run=true; // private final int dataLen=57600; //307200 OR 230400 76800 OR 57600 private final int tt=28800;
public void run() { // TODO Auto-generated method stub try { Socket socket = new Socket(remoteIPStr, 8899); DataOutputStream dos = new DataOutputStream(socket .getOutputStream()); DataInputStream dis = new DataInputStream(socket .getInputStream()); while (run) { dos.write(streamIt.yuv420sp, 0, 28800); dos.write(streamIt.yuv420sp, 28800, 28800);
dis.readBoolean(); Thread.sleep(155); } } catch (Exception ex) { run=false; ex.printStackTrace(); } }
}
@Override public void onClick(View view) { // TODO Auto-generated method stub if(view==connect){//连接函数 remoteIPStr=remoteIP.getText().toString(); new Thread(AndroidVideo.kit).start(); } } }
class StreamIt implements Camera.PreviewCallback { public byte[] yuv420sp =null; private boolean t=true;
public void onPreviewFrame(byte[] data, Camera camera) { // TODO Auto-generated method stub // if(t){ // t=false; // new Thread(AndroidVideo.kit).start(); // } yuv420sp=data; } } PC端 import java.awt.Frame; import java.awt.Graphics; import java.awt.Point; import java.awt.Transparency; import java.awt.color.ColorSpace; import java.awt.image.BufferedImage; import java.awt.image.ComponentColorModel; import java.awt.image.DataBuffer; import java.awt.image.DataBufferByte; import java.awt.image.PixelInterleavedSampleModel; import java.awt.image.Raster; import java.awt.image.SampleModel; import java.awt.image.WritableRaster; import java.io.DataInputStream; import java.io.DataOutputStream; import java.net.ServerSocket; import java.net.Socket;
public class FlushMe extends Frame { private static final long serialVersionUID = 1L; private BufferedImage im; // 图像信息 // private final int width = 480; // private final int height = 320; private static final int width = 240; private static final int height = 160; private static final int numBands = 3; private static final int dataLen = 57600;//307200 OR 230400//57600 76800 private static final int tt = 28800;//14400;//28800; // 图像数组 private byte[] byteArray = new byte[width * height * numBands];// 图像RGB数组 private byte[] yuv420sp = new byte[dataLen];// 图像YUV数组
private static final int[] bandOffsets = new int[] { 0, 1, 2 }; private static final SampleModel sampleModel = new PixelInterleavedSampleModel( DataBuffer.TYPE_BYTE, width, height, 3, width * 3, bandOffsets); // ColorModel private static final ColorSpace cs=ColorSpace.getInstance(ColorSpace.CS_sRGB); private static final ComponentColorModel cm=new ComponentColorModel(cs, false, false, Transparency.OPAQUE, DataBuffer.TYPE_BYTE);
public FlushMe() { super("Flushing"); updateIM(); setSize(480, 320); // 窗口关闭方法 this.addWindowListener(new java.awt.event.WindowAdapter() { public void windowClosing(java.awt.event.WindowEvent e) { System.exit(0); } }); // 窗口居中 this.setLocationRelativeTo(null); this.setResizable(false); this.setVisible(true); this.getData(); }
public void update(Graphics g){ paint(g); }
public void paint(Graphics g) { g.drawImage(im, 0, 0, 480, 320, this); }
public void getData() { try { ServerSocket server = new ServerSocket(8899); Socket socket = server.accept(); DataInputStream dis = new DataInputStream(socket.getInputStream()); DataOutputStream dos = new DataOutputStream(socket.getOutputStream()); while (true) { for (int i = 0; i < dataLen / tt; i++) { dis.read(yuv420sp, i * tt, tt); } // 得到数据之后立即更新显示 updateIM(); im.flush(); repaint();
dos.writeBoolean(true); } } catch (Exception ex) { ex.printStackTrace(); } }
private void updateIM() { try { // 解析YUV成RGB格式 decodeYUV420SP(byteArray, yuv420sp, width, height); DataBuffer dataBuffer = new DataBufferByte(byteArray, numBands); WritableRaster wr = Raster.createWritableRaster(sampleModel, dataBuffer, new Point(0, 0)); im = new BufferedImage(cm, wr, false, null); } catch (Exception ex) { ex.printStackTrace(); } }
private static void decodeYUV420SP(byte[] rgbBuf, byte[] yuv420sp, int width, int height) { final int frameSize = width * height; if (rgbBuf == null) throw new NullPointerException("buffer 'rgbBuf' is null"); if (rgbBuf.length < frameSize * 3) throw new IllegalArgumentException("buffer 'rgbBuf' size " + rgbBuf.length + " < minimum " + frameSize * 3);
if (yuv420sp == null) throw new NullPointerException("buffer 'yuv420sp' is null");
if (yuv420sp.length < frameSize * 3 / 2) throw new IllegalArgumentException("buffer 'yuv420sp' size " + yuv420sp.length + " < minimum " + frameSize * 3 / 2);
int i = 0, y = 0; int uvp = 0, u = 0, v = 0; int y1192 = 0, r = 0, g = 0, b = 0;
for (int j = 0, yp = 0; j < height; j++) { uvp = frameSize + (j >> 1) * width; u = 0; v = 0; for (i = 0; i < width; i++, yp++) { y = (0xff & ((int) yuv420sp[yp])) - 16; if (y < 0) y = 0; if ((i & 1) == 0) { v = (0xff & yuv420sp[uvp++]) - 128; u = (0xff & yuv420sp[uvp++]) - 128; }
y1192 = 1192 * y; r = (y1192 + 1634 * v); g = (y1192 - 833 * v - 400 * u); b = (y1192 + 2066 * u);
if (r < 0) r = 0; else if (r > 262143) r = 262143; if (g < 0) g = 0; else if (g > 262143) g = 262143; if (b < 0) b = 0; else if (b > 262143) b = 262143;
rgbBuf[yp * 3] = (byte) (r >> 10); rgbBuf[yp * 3 + 1] = (byte) (g >> 10); rgbBuf[yp * 3 + 2] = (byte) (b >> 10); } } }
public static void main(String[] args) { Frame f = new FlushMe(); } }
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