Example.cpp File Reference Detailed Description Test and sample program for CodeVis VidCapture. This program is a feature test of the CVVidCapture code. It shows how to perform simple image capture tasks for WebCams with the DirectShow interface from Microsoft. You'll need the DirectX SDK installed and a WebCamera. I'm using DirectX 9.0, but it should work on some previous versions. Compiled and tested with Visual C++ 6.0 and a Creative Labs WebCam. RCSfile Example.cpp,v Date 2004/02/18 09:40:39 Revision 1.2 Author mikeellison Definition in file Example.cpp. #include <stdio.h> #include "VidCapture.h" #include "CVUtil.h" Go to the source code of this file. Defines #define EXIT_MACRO Functions bool TestIt () bool enumCallback (const char *devname, void *userParam) bool capCallback (CVRES status, CVImage *image, void *userParam) void SlowNegateImage (CVImage *image) void main () Variables char gDeviceName [256] int gFrameNum = 0 int gDevNum = 0 Define Documentation #define EXIT_MACRO   Definition at line 75 of file Example.cpp. Referenced by main(). Function Documentation bool capCallback (  CVRES  status, CVImage *  image, void *  userParam )    capCallback is the main image capture callback function for continuous capture runs. We play with the image a bit inside to test out CVImage's functions. See also: CVVidCapture::CVVIDCAP_CALLBACK Definition at line 446 of file Example.cpp. References CVImage::CreateSub(), CVAssert, CVFAILED, CVSUCCESS, gFrameNum, CVImage::Height(), CVImage::ReleaseImage(), CVImage::Save(), SlowNegateImage(), and CVImage::Width(). Referenced by TestIt(). bool enumCallback (  const char *  devname, void *  userParam )    Callback for enumeration of capture devices. We're just saving the first one that comes by into gDeviceName[] and using it. See also: CVVidCapture::CVVIDCAP_ENUMCB Definition at line 424 of file Example.cpp. References gDeviceName, and gDevNum. void main (   )    Example program entry point. This program shows the base capabilities of VidCapture and how to use them. Definition at line 137 of file Example.cpp. References EXIT_MACRO, gDeviceName, gDevNum, gFrameNum, kVIDCAPTURE_STRING, and TestIt(). void SlowNegateImage (  CVImage *  image  )    SlowNegateImage() is a slow routine to negate an image. Works on any image type where the pixel values are 0-255, but it recalculates each pixel location in addition to having 2 subroutine calls per pixel - lots of overhead. Good for testing CVImage::GetPixel() and CVImage::SetPixel() though. Definition at line 566 of file Example.cpp. References CVFAILED, CVImage::GetPixel(), CVImage::Height(), CVImage::SetPixel(), and CVImage::Width(). Referenced by capCallback(). bool TestIt (   )    Primary test function. Returns: bool - true on successful run. may return false for a variety of reasons - check prints and traces for errors. Definition at line 177 of file Example.cpp. References CVPlatform::AcquireVideoCapture(), CVVidCapture::CAMERAPROP_BRIGHT, CVVidCapture::CAMERAPROP_CONTRAST, capCallback(), CVVidCapture::Connect(), CVFAILED, CVImage::CVIMAGE_GREY, CVImage::CVIMAGE_RGB24, CVSUCCESS, CVVidCapture::VIDCAP_DEVICE::DeviceString, CVVidCapture::Disconnect(), CVVidCapture::VIDCAP_MODE::EstFrameRate, gDeviceName, CVVidCapture::GetCurrentMode(), CVVidCapture::GetDeviceInfo(), CVVidCapture::GetDeviceName(), CVVidCapture::GetFormatModeName(), CVVidCapture::GetModeInfo(), CVVidCapture::GetNumDevices(), CVVidCapture::GetNumSupportedModes(), CVPlatform::GetPlatform(), CVVidCapture::GetPropertyInfo(), CVVidCapture::Grab(), CVVidCapture::Init(), CVVidCapture::VIDCAP_MODE::InputFormat, CVPlatform::Release(), CVImage::ReleaseImage(), CVImage::Save(), CVVidCapture::SetMode(), CVVidCapture::SetProperty(), CVVidCapture::StartImageCap(), CVVidCapture::Stop(), CVVidCapture::Uninit(), CVVidCapture::VIDCAP_MODE::XRes, and CVVidCapture::VIDCAP_MODE::YRes. Referenced by main(). Variable Documentation char gDeviceName[256]   Definition at line 123 of file Example.cpp. Referenced by enumCallback(), main(), and TestIt(). int gDevNum = 0   Definition at line 129 of file Example.cpp. Referenced by enumCallback(), and main(). int gFrameNum = 0   Definition at line 126 of file Example.cpp. Referenced by capCallback(), and main().

---