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Helpers.cpp
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Helpers.cpp
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#include "Helpers.h"
#include <mfidl.h>
#include <mfapi.h>
wxArrayString Helpers::wxArrStrFromVector(std::vector<wchar_t*> vec)
{
wxArrayString deviceDisplayNames;
if (vec.empty())
return deviceDisplayNames;
for (int i = 0; i < vec.size(); i++)
deviceDisplayNames.Add(vec[i]);
return deviceDisplayNames;
}
HRESULT Helpers::getVideoDeviceNames(std::vector<wchar_t*>& deviceNames)
{
unsigned int videoDevicesCount;
unsigned int nameLength = 0;
wchar_t* deviceName = 0;
HRESULT result;
IMFActivate** pMFVideoDevicesArray = NULL;
IMFAttributes* pAttributes = NULL;
// Create an attribute store to specify the enumeration parameters.
result = MFCreateAttributes(&pAttributes, 1);
// Source type: video capture devices
result = pAttributes->SetGUID(MF_DEVSOURCE_ATTRIBUTE_SOURCE_TYPE, MF_DEVSOURCE_ATTRIBUTE_SOURCE_TYPE_VIDCAP_GUID);
// Enumerate devices.
result = MFEnumDeviceSources(pAttributes, &pMFVideoDevicesArray, &videoDevicesCount);
for (UINT32 i = 0; i < videoDevicesCount; i++)
{
result = pMFVideoDevicesArray[i]->GetAllocatedString(MF_DEVSOURCE_ATTRIBUTE_FRIENDLY_NAME, &deviceName, &nameLength);
deviceNames.push_back(deviceName);
}
SafeRelease(&pAttributes);
for (unsigned int i = 0; i < videoDevicesCount; i++)
SafeRelease(&pMFVideoDevicesArray[i]);
CoTaskMemFree(pMFVideoDevicesArray);
return result;
}
template <class T>
static void Helpers::SafeRelease(T** ppT)
{
if (*ppT)
{
(*ppT)->Release();
*ppT = NULL;
}
}