CreateFromArray quit working

最新推荐文章于 2019-11-17 13:27:56 发布

Augusdi

最新推荐文章于 2019-11-17 13:27:56 发布

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分类专栏： CxImage

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Hi Davide
First thanks for this software - its great!

I was working with CxImage for couple of months, and it works great. In some point it quit. I call CreateFromArray and it does nothing to the object. GetLastError returns an empty string. What I’m doing is convert a buffer I get from my webcam to a jpeg image. I call this function on a callback function from the windows Video Capture.
I did not change a thing in my code or linking.
Here is the relevant part of the code:
Code:


LRESULT PASCAL FrameCallbackProc (HWND hWnd, LPVIDEOHDR lpVHdr) 
{
    /* Get the Format struct. */
    int size = capGetVideoFormatSize (hWnd);
    char* format = new char [size];
    capGetVideoFormat (hWnd, format, size);

    /* Make CxImage from the buffer received from webcam driver.*/
    CxImage image;
    image.CreateFromArray ((BYTE*)lpVHdr->lpData, 
	  ((BITMAPINFO*)format)->bmiHeader.biWidth, 
	  ((BITMAPINFO*)format)->bmiHeader.biHeight, 
	  ((BITMAPINFO*)format)->bmiHeader.biBitCount, 
	  ((BITMAPINFO*)format)->bmiHeader.biWidth * 
	     ((BITMAPINFO*)format)->bmiHeader.biBitCount / 8, 
    FALSE);

...

I do not think the problem is with CxImage but I probably changed some thing in the system. I don't know what.

Did you bump into this problem in the past?

Any lead will be most appreciated
Thanks
Erez Bibi

http://dcru-server.com

Found the problem
The BitPerPixel was set to 12 I had to set it to 24 and set the compression to None.