Tcp -video client

VijayMukilan

Hi All,

New to Qt, started working well.

I am developing a video client. Server is already sending a data using opencv decodeimage so i got receving .jpg image with header info .

In the client side i did
@
_pSocketVideo = new QTcpSocket( this );

   _pSocketVideo->connectToHost(IpList[DeviceNumber],VIDEO_PORT);

    connect( _pSocketVideo, SIGNAL(readyRead()), SLOT(VideoDataRead()) );

connect(this,SIGNAL(getFrame(QByteArray)),cameraViewMap[DeviceNumber],SLOT(packFrame(QByteArray)));

void MainWindow::VideoDataRead()
{

VideoData =VideoData+_pSocketVideo->readAll();
if(firstread)
{
   byte= MAKEDWORD(VideoData.at(0),VideoData.at(1),VideoData.at(2),VideoData.at(3));

    std::cout << byte ;
    firstread=0;
}
if(byte == VideoData.size())  // here i get the required data in buffer.
    emit getFrame(VideoData);

}
@
Here comes by problem. The received data
@
void CameraView::packFrame(QByteArray ReadData)
{

unsigned char FrameBuffer[1024*20];
QByteArray CopyData;

int i;
int size;
frameprocess.lock();
CopyData=ReadData;
size=CopyData.size();
iSync = MAKEDWORD(CopyData.at(0),CopyData.at(1),CopyData.at(2),CopyData.at(3));
iLength = MAKEDWORD(CopyData.at(4),CopyData.at(5),CopyData.at(6),CopyData.at(7));
iSize = MAKEDWORD(CopyData.at(8),CopyData.at(9),CopyData.at(10),CopyData.at(11));
iRows = MAKEDWORD(CopyData.at(12),CopyData.at(13),CopyData.at(14),CopyData.at(15));
iCols = MAKEDWORD(CopyData.at(16),CopyData.at(17),CopyData.at(18),CopyData.at(19));

// all my datas go correct here matching with the server

  memcpy(&FrameBuffer[0],&CopyData,size);

/*
here i try to match the server data and client data i am going wrong...
FILE *fin=fopen("test.bin","wb");
fwrite(&FrameBuffer[20],sizeof(unsigned char),iSize,fin);
fclose(fin);
*/

// ofcourse i dont have option of using QImage as its from opencv .jpg
cvMat *decode =cvCreateMat(iRows,iSize,CV_8UC1);
decode->data.ptr=&FrameBuffer[20];
frame = cvDecodeImage(decode,CV_LOAD_IMAGE_COLOR);
if(frame)
std::cout << "not a vaid frame ";
// here it goes wrong ?? I am not ware why . My bins dont match... pls help
}
@

[Edited to add @ tags -- mlong]

andreyc

Please add @ around your code. It will format the code.

mrdebug

Which is the problem exactly? I think is not so hard to do.
Remember that the jpg image starts with 0xff 0xd9 and ends with 0xff 0xd8.