/*static */HRESULT MFMovieSource::GetDuration( IMFSourceReader* reader, UINT64& duration )
{
// https://msdn.microsoft.com/ja-jp/library/windows/desktop/ms702060(v=vs.85).aspx
HRESULT hr;
PROPVARIANT var={};
PropVariantInit( &var );
hr=reader->GetPresentationAttribute(
(DWORD)MF_SOURCE_READER_MEDIASOURCE,
MF_PD_DURATION,
&var );
if( SUCCEEDED( hr ) )
{
long long tmp = 0;
PropVariantToInt64( var, &tmp );
duration = (UINT64)std::max(tmp, 0LL);
PropVariantClear( &var );
}
return hr;
}
/******************************************************************
* PropVariantChangeType (PROPSYS.@)
*/
HRESULT WINAPI PropVariantChangeType(PROPVARIANT *ppropvarDest, REFPROPVARIANT propvarSrc,
PROPVAR_CHANGE_FLAGS flags, VARTYPE vt)
{
HRESULT hr;
FIXME("(%p, %p, %d, %d, %d): semi-stub!\n", ppropvarDest, propvarSrc,
propvarSrc->vt, flags, vt);
if(vt == propvarSrc->vt)
return PropVariantCopy(ppropvarDest, propvarSrc);
switch (vt)
{
case VT_I2:
{
SHORT res;
hr = PropVariantToInt16(propvarSrc, &res);
if (SUCCEEDED(hr))
{
ppropvarDest->vt = VT_I2;
ppropvarDest->u.iVal = res;
}
return hr;
}
case VT_UI2:
{
USHORT res;
hr = PropVariantToUInt16(propvarSrc, &res);
if (SUCCEEDED(hr))
{
ppropvarDest->vt = VT_UI2;
ppropvarDest->u.uiVal = res;
}
return hr;
}
case VT_I4:
{
LONG res;
hr = PropVariantToInt32(propvarSrc, &res);
if (SUCCEEDED(hr))
{
ppropvarDest->vt = VT_I4;
ppropvarDest->u.lVal = res;
}
return hr;
}
case VT_UI4:
{
ULONG res;
hr = PropVariantToUInt32(propvarSrc, &res);
if (SUCCEEDED(hr))
{
ppropvarDest->vt = VT_UI4;
ppropvarDest->u.ulVal = res;
}
return hr;
}
case VT_I8:
{
LONGLONG res;
hr = PropVariantToInt64(propvarSrc, &res);
if (SUCCEEDED(hr))
{
ppropvarDest->vt = VT_I8;
ppropvarDest->u.hVal.QuadPart = res;
}
return hr;
}
case VT_UI8:
{
ULONGLONG res;
hr = PropVariantToUInt64(propvarSrc, &res);
if (SUCCEEDED(hr))
{
ppropvarDest->vt = VT_UI8;
ppropvarDest->u.uhVal.QuadPart = res;
}
return hr;
}
case VT_LPWSTR:
{
WCHAR *res;
hr = PropVariantToStringAlloc(propvarSrc, &res);
if (SUCCEEDED(hr))
{
ppropvarDest->vt = VT_LPWSTR;
ppropvarDest->u.pwszVal = res;
}
return hr;
}
}
switch (propvarSrc->vt)
{
case VT_FILETIME:
return PROPVAR_ConvertFILETIME(ppropvarDest, propvarSrc, vt);
default:
FIXME("Unhandled source type: %d\n", propvarSrc->vt);
}
return E_FAIL;
}
/******************************************************************
* PropVariantChangeType (PROPSYS.@)
*/
HRESULT WINAPI PropVariantChangeType(PROPVARIANT *ppropvarDest, REFPROPVARIANT propvarSrc,
PROPVAR_CHANGE_FLAGS flags, VARTYPE vt)
{
HRESULT hr;
FIXME("(%p, %p, %d, %d, %d): semi-stub!\n", ppropvarDest, propvarSrc,
propvarSrc->vt, flags, vt);
if (vt == propvarSrc->vt)
return PropVariantCopy(ppropvarDest, propvarSrc);
if (propvarSrc->vt == VT_FILETIME)
return PROPVAR_ConvertFILETIME(&propvarSrc->u.filetime, ppropvarDest, vt);
switch (vt)
{
case VT_I1:
{
LONGLONG res;
hr = PROPVAR_ConvertNumber(propvarSrc, 8, TRUE, &res);
if (SUCCEEDED(hr))
{
ppropvarDest->vt = VT_I1;
ppropvarDest->u.cVal = (char)res;
}
return hr;
}
case VT_UI1:
{
LONGLONG res;
hr = PROPVAR_ConvertNumber(propvarSrc, 8, FALSE, &res);
if (SUCCEEDED(hr))
{
ppropvarDest->vt = VT_UI1;
ppropvarDest->u.bVal = (UCHAR)res;
}
return hr;
}
case VT_I2:
{
SHORT res;
hr = PropVariantToInt16(propvarSrc, &res);
if (SUCCEEDED(hr))
{
ppropvarDest->vt = VT_I2;
ppropvarDest->u.iVal = res;
}
return hr;
}
case VT_UI2:
{
USHORT res;
hr = PropVariantToUInt16(propvarSrc, &res);
if (SUCCEEDED(hr))
{
ppropvarDest->vt = VT_UI2;
ppropvarDest->u.uiVal = res;
}
return hr;
}
case VT_I4:
{
LONG res;
hr = PropVariantToInt32(propvarSrc, &res);
if (SUCCEEDED(hr))
{
ppropvarDest->vt = VT_I4;
ppropvarDest->u.lVal = res;
}
return hr;
}
case VT_UI4:
{
ULONG res;
hr = PropVariantToUInt32(propvarSrc, &res);
if (SUCCEEDED(hr))
{
ppropvarDest->vt = VT_UI4;
ppropvarDest->u.ulVal = res;
}
return hr;
}
case VT_I8:
{
LONGLONG res;
hr = PropVariantToInt64(propvarSrc, &res);
if (SUCCEEDED(hr))
{
ppropvarDest->vt = VT_I8;
ppropvarDest->u.hVal.QuadPart = res;
}
return hr;
}
case VT_UI8:
{
ULONGLONG res;
hr = PropVariantToUInt64(propvarSrc, &res);
if (SUCCEEDED(hr))
{
ppropvarDest->vt = VT_UI8;
ppropvarDest->u.uhVal.QuadPart = res;
}
return hr;
}
case VT_LPWSTR:
case VT_BSTR:
{
WCHAR *res;
hr = PropVariantToStringAlloc(propvarSrc, &res);
if (SUCCEEDED(hr))
{
ppropvarDest->vt = VT_LPWSTR;
ppropvarDest->u.pwszVal = res;
}
return hr;
}
case VT_LPSTR:
{
WCHAR *resW;
hr = PropVariantToStringAlloc(propvarSrc, &resW);
if (SUCCEEDED(hr))
{
char *res;
DWORD len;
len = WideCharToMultiByte(CP_ACP, 0, resW, -1, NULL, 0, NULL, NULL);
res = CoTaskMemAlloc(len);
if (res)
{
WideCharToMultiByte(CP_ACP, 0, resW, -1, res, len, NULL, NULL);
ppropvarDest->vt = VT_LPSTR;
ppropvarDest->u.pszVal = res;
}
else
hr = E_OUTOFMEMORY;
CoTaskMemFree(resW);
}
return hr;
}
default:
FIXME("Unhandled dest type: %d\n", vt);
return E_FAIL;
}
}