+HRESULT
+STDMETHODCALLTYPE
+CInputPin::GetSupportedSets(
+ LPGUID * pOutGuid,
+ PULONG NumGuids)
+{
+ KSPROPERTY Property;
+ LPGUID pGuid;
+ ULONG NumProperty = 0;
+ ULONG NumMethods = 0;
+ ULONG NumEvents = 0;
+ ULONG Length;
+ ULONG BytesReturned;
+ HRESULT hr;
+
+ Property.Set = GUID_NULL;
+ Property.Id = 0;
+ Property.Flags = KSPROPERTY_TYPE_SETSUPPORT;
+
+ KsSynchronousDeviceControl(m_hPin, IOCTL_KS_PROPERTY, (PVOID)&Property, sizeof(KSPROPERTY), NULL, 0, &NumProperty);
+ KsSynchronousDeviceControl(m_hPin, IOCTL_KS_METHOD, (PVOID)&Property, sizeof(KSPROPERTY), NULL, 0, &NumMethods);
+ KsSynchronousDeviceControl(m_hPin, IOCTL_KS_ENABLE_EVENT, (PVOID)&Property, sizeof(KSPROPERTY), NULL, 0, &NumEvents);
+
+ Length = NumProperty + NumMethods + NumEvents;
+
+ assert(Length);
+
+ // allocate guid buffer
+ pGuid = (LPGUID)CoTaskMemAlloc(Length);
+ if (!pGuid)
+ {
+ // failed
+ return E_OUTOFMEMORY;
+ }
+
+ NumProperty /= sizeof(GUID);
+ NumMethods /= sizeof(GUID);
+ NumEvents /= sizeof(GUID);
+
+#ifdef KSPROXY_TRACE
+ WCHAR Buffer[200];
+ swprintf(Buffer, L"CInputPin::GetSupportedSets NumProperty %lu NumMethods %lu NumEvents %lu\n", NumProperty, NumMethods, NumEvents);
+ OutputDebugStringW(Buffer);
+#endif
+
+ // get all properties
+ hr = KsSynchronousDeviceControl(m_hPin, IOCTL_KS_PROPERTY, (PVOID)&Property, sizeof(KSPROPERTY), (PVOID)pGuid, Length, &BytesReturned);
+ if (FAILED(hr))
+ {
+ CoTaskMemFree(pGuid);
+ return E_FAIL;
+ }
+ Length -= BytesReturned;
+
+ // get all methods
+ if (Length && NumMethods)
+ {
+ hr = KsSynchronousDeviceControl(m_hPin, IOCTL_KS_METHOD, (PVOID)&Property, sizeof(KSPROPERTY), (PVOID)&pGuid[NumProperty], Length, &BytesReturned);
+ if (FAILED(hr))
+ {
+ CoTaskMemFree(pGuid);
+ return E_FAIL;
+ }
+ Length -= BytesReturned;
+ }
+
+ // get all events
+ if (Length && NumEvents)
+ {
+ hr = KsSynchronousDeviceControl(m_hPin, IOCTL_KS_ENABLE_EVENT, (PVOID)&Property, sizeof(KSPROPERTY), (PVOID)&pGuid[NumProperty+NumMethods], Length, &BytesReturned);
+ if (FAILED(hr))
+ {
+ CoTaskMemFree(pGuid);
+ return E_FAIL;
+ }
+ Length -= BytesReturned;
+ }
+
+ *pOutGuid = pGuid;
+ *NumGuids = NumProperty+NumEvents+NumMethods;
+ return S_OK;
+}
+
+HRESULT
+STDMETHODCALLTYPE
+CInputPin::LoadProxyPlugins(
+ LPGUID pGuids,
+ ULONG NumGuids)
+{
+ ULONG Index;
+ LPOLESTR pStr;
+ HKEY hKey, hSubKey;
+ HRESULT hr;
+ IUnknown * pUnknown;
+
+ if (RegOpenKeyExW(HKEY_LOCAL_MACHINE, L"SYSTEM\\CurrentControlSet\\Control\\MediaInterfaces", 0, KEY_READ, &hKey) != ERROR_SUCCESS)
+ {
+ OutputDebugStringW(L"CInputPin::LoadProxyPlugins failed to open MediaInterfaces key\n");
+ return E_FAIL;
+ }
+
+ // enumerate all sets
+ for(Index = 0; Index < NumGuids; Index++)
+ {
+ // convert to string
+ hr = StringFromCLSID(pGuids[Index], &pStr);
+ if (FAILED(hr))
+ return E_FAIL;
+
+ // now try open class key
+ if (RegOpenKeyExW(hKey, pStr, 0, KEY_READ, &hSubKey) != ERROR_SUCCESS)
+ {
+ // no plugin for that set exists
+ CoTaskMemFree(pStr);
+ continue;
+ }
+
+ // try load plugin
+ hr = CoCreateInstance(pGuids[Index], (IBaseFilter*)this, CLSCTX_INPROC_SERVER, IID_IUnknown, (void**)&pUnknown);
+ if (SUCCEEDED(hr))
+ {
+ // store plugin
+ m_Plugins.push_back(pUnknown);
+DebugBreak();
+ }
+ // close key
+ RegCloseKey(hSubKey);
+ }
+
+ // close media interfaces key
+ RegCloseKey(hKey);
+ return S_OK;
+}
+