MATLAB IMAGE ACQUISITION TOOLBOX - RELEASE NOTES Guide de l'utilisateur télécharger pdf (Page 90)

5 Acquiring Image Data

5-12

return true;

// Create the image acquistion thread.

_acquireThread = CreateThread(NULL,

acquireThread,

this,

&_acquireThreadID);

if (_acquireThread == NULL) {

closeDevice();

return false;

}

// Wait for thread to create message queue.

while(PostThreadMessage(_acquireThreadID,WM_USER+1,0,0) == 0)

Sleep(1);

return true;

}

To be able to compile and link your adaptor, you must create a stub implementation

of your acquireThread() function and add it to your adaptor. You can fill in

the complete implementation later — see “Implementing the Acquisition Thread

Function” on page 5-18.

DWORD WINAPI MyDeviceAdaptor::acquireThread(void* param) {

MSG msg;

while (GetMessage(&msg,NULL,0,0) > 0) {

switch (msg.message) {

case WM_USER:

// The frame acquisition loop code goes here.

imaqkit::adaptorWarn(''in acquire thread function \n'');

} // end switch

} // end while

return 0;

} // end acquireThread

Add declarations of the acquireThread() function, the acquireThread variable,

and the acquireThreadID variable as private data members of your adaptor class

header file. In this example, MyDeviceAdaptor.h.

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MATLAB IMAGE ACQUISITION TOOLBOX - RELEASE NOTES Guide de l'utilisateur Page 90