IltmmVideoProcAmp::GetRange Example for C++

HRESULT GetCaptureVideoFormatCount(IltmmCapture *pCapture) 
{ 
   HRESULT   hr; 
   long      lMin, lMax, lSteppingDelta, lDefault, lCapsFlags; 
   long      lFlags, lVal; 
 
   IltmmVideoProcAmp* pVidProcAmp = NULL; 
 
   // try to get the capture object's VideoProAmp object 
   hr = pCapture->get_VideoProcAmp(&pVidProcAmp); 
   if (FAILED(hr)) 
      return hr; 
 
   // try to get the range info for the proc amp 
   hr = pVidProcAmp->GetRange(ltmmVideoProcAmp_Brightness, 
                               &lMin, &lMax, &lSteppingDelta, 
                               &lDefault, &lCapsFlags); 
   if (FAILED(hr)) 
   { 
      // release the video proc amp object 
      pVidProcAmp->Release(); 
      return hr; 
   } 
 
   // try to get the brightness value and (auto or manual) settings  
   hr = pVidProcAmp->Get(ltmmVideoProcAmp_Brightness, 
                          &lVal, &lFlags); 
   if (FAILED(hr)) 
   { 
      // release the video proc amp object 
      pVidProcAmp->Release(); 
      return hr; 
   } 
 
   // set the brightness value to a manual setting of current+10  
   lVal = min(lVal + 10, lMax); 
   hr = pVidProcAmp->Set(ltmmVideoProcAmp_Brightness, 
                          lVal, ltmmVideoProcAmp_Flags_Manual); 
   if (FAILED(hr)) 
   { 
      // release the video proc amp object 
      pVidProcAmp->Release(); 
      return hr; 
   } 
 
   // release the video proc amp object 
   pVidProcAmp->Release(); 
 
   return S_OK; 
} 
Help Version 20.0.2019.3.12
Products | Support | Contact Us | Intellectual Property Notices
© 1991-2019 LEAD Technologies, Inc. All Rights Reserved.

LEADTOOLS Multimedia C API Help