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Fix for unhandled error cases when using Media Foundation

Browse Source 
Some function calls to Media Foundation can fail and retrun null
pointers. They should be checked before being dereferenced to avoid a
crash.
This commit is contained in:
chacha21 2016-12-13 10:40:06 +01:00
parent 2fded5d8fb
commit 166d75e3c5
1 changed files with 23 additions and 9 deletions
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32
modules/videoio/src/cap_msmf.cpp
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@ -1986,13 +1986,17 @@ long videoDevice::resetDevice(IMFActivate *pActivate)
&vd_pFriendlyName,
NULL
);
hr = pActivate->ActivateObject(
__uuidof(IMFMediaSource),
(void**)&pSource
);
enumerateCaptureFormats(pSource);
buildLibraryofTypes();
SafeRelease(&pSource);
if (SUCCEEDED(hr))
hr = pActivate->ActivateObject(
__uuidof(IMFMediaSource),
(void**)&pSource
);
if (SUCCEEDED(hr) && pSource)
{
enumerateCaptureFormats(pSource);
buildLibraryofTypes();
SafeRelease(&pSource);
}//end if (SUCCEEDED(hr) && pSource)
if(FAILED(hr))
{
vd_pFriendlyName = NULL;
@ -2638,7 +2642,12 @@ HRESULT videoDevice::enumerateCaptureFormats(IMFMediaSource *pSource)
_ComPtr<IMFStreamDescriptor> pSD = NULL;
_ComPtr<IMFMediaTypeHandler> pHandler = NULL;
_ComPtr<IMFMediaType> pType = NULL;
HRESULT hr = pSource->CreatePresentationDescriptor(pPD.GetAddressOf());
HRESULT hr = !pSource ? E_POINTER : S_OK;
if (FAILED(hr))
{
goto done;
}
hr = pSource->CreatePresentationDescriptor(pPD.GetAddressOf());
if (FAILED(hr))
{
goto done;
@ -3815,7 +3824,12 @@ HRESULT CvCaptureFile_MSMF::enumerateCaptureFormats(IMFMediaSource *pSource)
_ComPtr<IMFStreamDescriptor> pSD = NULL;
_ComPtr<IMFMediaTypeHandler> pHandler = NULL;
_ComPtr<IMFMediaType> pType = NULL;
HRESULT hr = pSource->CreatePresentationDescriptor(pPD.GetAddressOf());
HRESULT hr = !pSource ? E_POINTER : S_OK;
if (FAILED(hr))
{
goto done;
}
hr = pSource->CreatePresentationDescriptor(pPD.GetAddressOf());
if (FAILED(hr))
{
goto done;