实例介绍
【实例简介】
【实例截图】
【核心代码】
package com.spore;
import java.io.ByteArrayOutputStream;
import java.util.List;
import android.content.Context;
import android.content.res.Configuration;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.graphics.ImageFormat;
import android.graphics.PixelFormat;
import android.graphics.Rect;
import android.graphics.YuvImage;
import android.hardware.Camera;
import android.hardware.Camera.PreviewCallback;
import android.hardware.Camera.Size;
import android.media.MediaRecorder;
import android.os.Handler;
import android.os.Looper;
import android.os.Message;
import android.util.AttributeSet;
import android.util.Log;
import android.view.SurfaceHolder;
import android.view.SurfaceView;
import android.widget.Toast;
public class CameraView extends SurfaceView implements SurfaceHolder.Callback {
private static String TAG = "CameraView";
private SurfaceHolder mSurfaceHolder = null;
private Camera mCamera = null;
int mPreviewHeight = 800; //
int mPreviewWidth = 480;
ProcessThread mProcessThread = new ProcessThread();
private static Object INSTANCE_LOCK = new Object();
byte[] mTempData;
int mWidth = 0, mHeight = 0;
int mFrameRate = 0;
long mFrameRateStartTime = 0;
public CameraView(Context context) {
super(context);
Log.v(TAG, "CameraView .");
init_impl();
}
public CameraView(Context context, AttributeSet attrs) {
super(context, attrs);
Log.v(TAG, "CameraView ..");
init_impl();
}
public CameraView(Context context, AttributeSet attrs, int defStyle) {
super(context, attrs, defStyle);
Log.v(TAG, "CameraView ...");
init_impl();
}
void init_impl() {
mSurfaceHolder = this.getHolder();
mSurfaceHolder.addCallback(this);
mSurfaceHolder.setType(SurfaceHolder.SURFACE_TYPE_PUSH_BUFFERS);
mProcessThread.start();
}
@Override
public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) {
Log.v(TAG, "surfaceChanged width =" width "height =" height);
if (holder.getSurface() == null) {
Log.d(TAG, "holder.getSurface() == null");
return;
}
mSurfaceHolder = holder;
initCamera();
}
public boolean ttt = false;
public boolean ttt1 = false;
@Override
public void surfaceCreated(SurfaceHolder holder) {
// CameraEngineActivity.getImageEngine().decodeYUV420SP(new byte[10], mWidth, mHeight);
mCamera = Camera.open();// �?启摄像头�?2.3版本后支持多摄像�?,�?传入参数�?
try {
Log.v(TAG, "SurfaceHolder.Callback：surface Created");
mCamera.setPreviewCallback(new PreviewCallback(){
@Override
public void onPreviewFrame(byte[] data, Camera camera) {
// TODO Auto-generated method stub
// YuvImage yuvimage = new YuvImage(data, ImageFormat.NV21,
// camera.getParameters().getPreviewSize().width,
// camera.getParameters().getPreviewSize().height, null);
// ByteArrayOutputStream mJpegOutput = new ByteArrayOutputStream(data.length);
//
// yuvimage.compressToJpeg(new Rect(0, 0, mWidth, mHeight), 100, mJpegOutput);
// Bitmap mBitmapIn = BitmapFactory.decodeByteArray( mJpegOutput.toByteArray(), 0, mJpegOutput.size());
// CameraEngineActivity.getRender().update(mBitmapIn);
// Log.e(TAG, "bbbbb");
mWidth = camera.getParameters().getPreviewSize().width;
mHeight = camera.getParameters().getPreviewSize().height;
int length = data.length;
if(mFrameRateStartTime == 0)
{
mFrameRateStartTime = System.currentTimeMillis();
}
mFrameRate ;
if(mFrameRate % 30 == 0){
long rate = mFrameRate * 1000 / (System.currentTimeMillis() - mFrameRateStartTime);
Toast.makeText(CameraEngineActivity.getRender().mContext, "Frame Rate:" rate, Toast.LENGTH_SHORT)
.show();
}
// Log.e(TAG, "aaaaa");
long start = System.currentTimeMillis();
int[] buf = CameraEngineActivity.getImageEngine().decodeYUV420SP(data, mWidth, mHeight);
// Log.e(TAG, "bbbbbb");
start = System.currentTimeMillis() - start;
start = System.currentTimeMillis();
CameraEngineActivity.getRender().mFrameBuf = buf;
CameraEngineActivity.getRender().update(buf, mWidth, mHeight);
start = System.currentTimeMillis() - start;
}
});
mCamera.setPreviewDisplay(mSurfaceHolder);// set the surface to be used for live preview
} catch (Exception ex) {
if (null != mCamera) {
mCamera.release();
mCamera = null;
}
}
}
class ProcessThread extends Thread {
public Handler mHandler;
public void run() {
Looper.prepare(); //创建本线程的Looper并创建一个MessageQueue
mHandler = new Handler() {
public void handleMessage(Message msg) {
// process incoming messages here
switch (msg.what) {
case 0:
processData();
break;
default:
break;
}
}
};
Looper.loop(); //�?始运行Looper,监听Message Queue
}
public void processData(){
synchronized (INSTANCE_LOCK){
int[] buf = CameraEngineActivity.getImageEngine().decodeYUV420SP(mTempData, mWidth, mHeight);
CameraEngineActivity.getRender().update(buf, mWidth, mHeight);
}
}
}
static void decodeYUV420SP(int[] rgb, byte[] yuv420sp, int width, int height) {
final int frameSize = width * height;
for (int j = 0, yp = 0; j < height; j ) {
int uvp = frameSize (j >> 1) * width, u = 0, v = 0;
for (int i = 0; i < width; i , yp ) {
int 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;
}
int y1192 = 1192 * y;
int r = (y1192 1634 * v);
int g = (y1192 - 833 * v - 400 * u);
int 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;
rgb[yp] = 0xff000000 | ((r << 6) & 0xff0000) | ((g >> 2) & 0xff00) | ((b >> 10) & 0xff);
}
}
}
@Override
public void surfaceDestroyed(SurfaceHolder holder) {
Log.v(TAG, "surfaceDestroyed");
if(null != mCamera)
{
mCamera.setPreviewCallback(null); //！！这个必须在前，不然�??出出�?
mCamera.stopPreview();
mCamera.release();
mCamera = null;
}
mSurfaceHolder = null;
}
private void initCamera()// surfaceChanged中调�?
{
Log.i(TAG, "going into initCamera");
mCamera.stopPreview();// stopCamera();
if (null != mCamera) {
try {
/* Camera Service settings */
Camera.Parameters parameters = mCamera.getParameters();
// parameters.setFlashMode("off"); // 无闪光灯
parameters.setPictureFormat(PixelFormat.JPEG); // Sets the image format for picture
// 设定相片格式为JPEG，默认为NV21
parameters.setPreviewFormat(PixelFormat.YCbCr_420_SP); // Sets the image format for
// preview picture，默认为NV21
/*
* 【ImageFormat】JPEG/NV16(YCrCb format，used for Video)/NV21(YCrCb format，used for
* Image)/RGB_565/YUY2/YU12
*/
// 【调试�?�获取caera支持的PictrueSize，看看能否设置？�?
List<Size> pictureSizes = mCamera.getParameters().getSupportedPictureSizes();
List<Size> previewSizes = mCamera.getParameters().getSupportedPreviewSizes();
List<Integer> previewFormats = mCamera.getParameters().getSupportedPreviewFormats();
List<Integer> previewFrameRates = mCamera.getParameters().getSupportedPreviewFrameRates();
Log.i(TAG "initCamera", "cyy support parameters is ");
Size psize = null;
for (int i = 0; i < pictureSizes.size(); i ) {
psize = pictureSizes.get(i);
Log.e(TAG "initCamera", "PictrueSize,width: " psize.width " height" psize.height);
}
for (int i = 0; i < previewSizes.size(); i ) {
psize = previewSizes.get(i);
Log.e(TAG "initCamera", "PreviewSize,width: " psize.width " height" psize.height);
}
Integer pf = null;
for (int i = 0; i < previewFormats.size(); i ) {
pf = previewFormats.get(i);
Log.e(TAG "initCamera", "previewformates:" pf);
}
// 设置拍照和预览图片大�?
parameters.setPictureSize(640, 480); // 指定拍照图片的大�?
parameters.setPreviewSize(mPreviewHeight, mPreviewWidth); // 指定preview的大�?
// 这两个属�? 如果这两个属性设置的和真实手机的不一样时，就会报�?
// 横竖屏镜头自动调�?
if (this.getResources().getConfiguration().orientation != Configuration.ORIENTATION_LANDSCAPE) {
parameters.set("orientation", "portrait"); //
//parameters.set("rotation", 90); // 镜头角度�?90度（默认摄像头是横拍�?
mCamera.setDisplayOrientation(90); // �?2.2以上可以使用
} else// 如果是横�?
{
parameters.set("orientation", "landscape"); //
mCamera.setDisplayOrientation(0); // �?2.2以上可以使用
}
/* 视频流编码处�? */
// 添加对视频流处理函数
// 设定配置参数并开启预�?
mCamera.setParameters(parameters); // 将Camera.Parameters设定予Camera
mCamera.setPreviewCallback(new PreviewCallback(){
@Override
public void onPreviewFrame(byte[] data, Camera camera) {
final byte[] sendData = data;
mWidth = camera.getParameters().getPreviewSize().width;
mHeight = camera.getParameters().getPreviewSize().height;
Thread sendThread = new Thread(new Runnable() {
@Override
public void run() {
try {
openSession(sendData);
System.out.println("发送一个视频数据");
} catch (Exception e) {
e.printStackTrace();
System.out.println("RTP发送数据异常:" e);
}
}
});
sendThread.start();
if(mFrameRateStartTime == 0)
{
mFrameRateStartTime = System.currentTimeMillis();
}
mFrameRate ;
if(mFrameRate % 30 == 0){
long rate = mFrameRate * 1000 / (System.currentTimeMillis() - mFrameRateStartTime);
Toast.makeText(CameraEngineActivity.getRender().mContext, "Frame Rate:" rate, Toast.LENGTH_SHORT)
.show();
}
long start = System.currentTimeMillis();
int[] buf = CameraEngineActivity.getImageEngine().decodeYUV420SP(data, mWidth, mHeight);
start = System.currentTimeMillis() - start;
start = System.currentTimeMillis();
CameraEngineActivity.getRender().mFrameBuf = buf;
CameraEngineActivity.getRender().update(buf, mWidth, mHeight);
start = System.currentTimeMillis() - start;
}
});
mCamera.startPreview(); // 打开预览画面
// 【调试�?�设置后的图片大小和预览大小以及帧率
Camera.Size csize = mCamera.getParameters().getPreviewSize();
mPreviewHeight = csize.height; //
mPreviewWidth = csize.width;
Log.v(TAG "initCamera", "after setting, previewSize:width: " csize.width " height: "
csize.height);
csize = mCamera.getParameters().getPictureSize();
Log.v(TAG "initCamera", "after setting, pictruesize:width: " csize.width " height: "
csize.height);
Log.v(TAG "initCamera", "after setting, previewformate is "
mCamera.getParameters().getPreviewFormat());
Log.v(TAG "initCamera", "after setting, previewframetate is "
mCamera.getParameters().getPreviewFrameRate());
} catch (Exception e) {
e.printStackTrace();
}
}
}
public void openSession(byte[] data){
try {
byte[] b = new byte[1480];
for(int i=0;i<1480;i ){
b[i]=data[i];
}
InitSession test = new InitSession();
long teststart = System.currentTimeMillis();
test.rtpSession.sendData(b);
long testend = System.currentTimeMillis();
System.out.println("发送用时：" (testend - teststart));
} catch (Exception e) {
System.out.println("开启会话异常：" e);
}
}
}
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