Java 在C+中解码Android CameraPreview字节+;服务器
我正在使用此代码从我的Android手机获取Java 在C+中解码Android CameraPreview字节+;服务器,java,android,c++,sockets,opencv,Java,Android,C++,Sockets,Opencv,我正在使用此代码从我的Android手机获取CameraPreview- private Camera.PreviewCallback mPreviewCallback = new PreviewCallback() { @Override public void onPreviewFrame(byte[] data, Camera camera) { synchronized (mQueue) { if (mQueue.size() ==
CameraPreview
-
private Camera.PreviewCallback mPreviewCallback = new PreviewCallback() {
@Override
public void onPreviewFrame(byte[] data, Camera camera) {
synchronized (mQueue) {
if (mQueue.size() == MAX_BUFFER) {
mQueue.poll();
}
mQueue.add(data);
}
}
};
<> >将其发送到我的C++服务器,通过<代码>套接字< /代码> -/p>
mSocket = new Socket();
mSocket.connect(new InetSocketAddress(mIP, mPort), 10000);
BufferedOutputStream outputStream = new BufferedOutputStream(mSocket.getOutputStream());
BufferedInputStream inputStream = new BufferedInputStream(mSocket.getInputStream());
outputStream.write(mCameraPreview.getImageBuffer());
outputStream.flush();
我从网站上获得了这些代码,但服务器(我的Windows PC)是用C++
编码的,而在网站上,服务器代码是用Java
编码的。我想解码CameraPreview
字节,并在我的OpenCV窗口中显示它们。我可以接收字节,也可以显示它们,但我需要帮助将字节转换为图像。有人能帮我吗
对于那些不想访问该站点获取服务器Java代码的人,下面是代码-
在服务器端,使用缓冲区队列缓存传入数据:
public int-fillBuffer(字节[]数据,int-off,int-len,LinkedList-YUVQueue){
mTotalLength+=len;
MByteArrayOutstream.write(数据、关闭、len);
if(mTotalLength==mFrameLength){
已同步(YUVQueue){
添加(mByteArrayOutputStream.toByteArray());
mByteArrayOutputStream.reset();
}
mTotalLength=0;
System.out.println(“接收文件”);
}
返回0;
}
关于StackOverflow,我们可以使用以下代码来解码NV21数据:
public static int[]convertYUVtoRGB(字节[]yuv,int-width,int-height)
抛出NullPointerException,IllegalArgumentException{
int[]out=新int[宽度*高度];
int sz=宽度*高度;
int i,j;
int Y,Cr=0,Cb=0;
对于(j=0;j>1;
对于(i=0;i>1)*2;
Cb=yuv[cOff];
if(Cb<0)
Cb+=127;
其他的
Cb-=128;
Cr=yuv[cOff+1];
if(Cr<0)
Cr+=127;
其他的
Cr-=128;
}
int R=Y+Cr+(Cr>>2)+(Cr>>3)+(Cr>>5);
if(R<0)
R=0;
如果(R>255),则为else
R=255;
int G=Y-(Cb>>2)+(Cb>>4)+(Cb>>5)-(Cr>>1)
+(Cr>>3)+(Cr>>4)+(Cr>>5);
if(G<0)
G=0;
如果(G>255),则为else
G=255;
intb=Y+Cb+(Cb>>1)+(Cb>>2)+(Cb>>6);
if(B<0)
B=0;
如果(B>255),则为else
B=255;
输出[pixPtr++]=0xff000000+(B
public int fillBuffer(byte[] data, int off, int len, LinkedList<byte[]> YUVQueue) {
mTotalLength += len;
mByteArrayOutputStream.write(data, off, len);
if (mTotalLength == mFrameLength) {
synchronized (YUVQueue) {
YUVQueue.add(mByteArrayOutputStream.toByteArray());
mByteArrayOutputStream.reset();
}
mTotalLength = 0;
System.out.println("received file");
}
return 0;
}
public static int[] convertYUVtoRGB(byte[] yuv, int width, int height)
throws NullPointerException, IllegalArgumentException {
int[] out = new int[width * height];
int sz = width * height;
int i, j;
int Y, Cr = 0, Cb = 0;
for (j = 0; j < height; j++) {
int pixPtr = j * width;
final int jDiv2 = j >> 1;
for (i = 0; i < width; i++) {
Y = yuv[pixPtr];
if (Y < 0)
Y += 255;
if ((i & 0x1) != 1) {
final int cOff = sz + jDiv2 * width + (i >> 1) * 2;
Cb = yuv[cOff];
if (Cb < 0)
Cb += 127;
else
Cb -= 128;
Cr = yuv[cOff + 1];
if (Cr < 0)
Cr += 127;
else
Cr -= 128;
}
int R = Y + Cr + (Cr >> 2) + (Cr >> 3) + (Cr >> 5);
if (R < 0)
R = 0;
else if (R > 255)
R = 255;
int G = Y - (Cb >> 2) + (Cb >> 4) + (Cb >> 5) - (Cr >> 1)
+ (Cr >> 3) + (Cr >> 4) + (Cr >> 5);
if (G < 0)
G = 0;
else if (G > 255)
G = 255;
int B = Y + Cb + (Cb >> 1) + (Cb >> 2) + (Cb >> 6);
if (B < 0)
B = 0;
else if (B > 255)
B = 255;
out[pixPtr++] = 0xff000000 + (B << 16) + (G << 8) + R;
}
}
return out;
}