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/**************************************************************************
A/V Stream Camera Sample
Copyright (c) 2014, Microsoft Corporation.
File:
dllmain.cpp
Abstract:
DLL and COM initialization.
History:
created 5/15/2014
**************************************************************************/
//// THIS CODE AND INFORMATION IS PROVIDED "AS IS" WITHOUT WARRANTY OF
//// ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING BUT NOT LIMITED TO
//// THE IMPLIED WARRANTIES OF MERCHANTABILITY AND/OR FITNESS FOR A
//// PARTICULAR PURPOSE.
////
//// Copyright (c) Microsoft Corporation. All rights reserved
#include "stdafx.h"
#include "Mft0.h"
#include "Mft0clsid.h"
#include "Mft0Impl.h"
#include <wrl\module.h>
using namespace Microsoft::WRL;
// Module Ref count
volatile ULONG g_cRefModule = 0;
// Handle to the DLL's module
HMODULE g_hModule = NULL;
ULONG DllAddRef()
{
return InterlockedIncrement(&g_cRefModule);
}
ULONG DllRelease()
{
return InterlockedDecrement(&g_cRefModule);
}
class CClassFactory : public IClassFactory
{
public:
static HRESULT CreateInstance(
REFCLSID clsid,
REFIID riid,
_COM_Outptr_ void **ppv
)
{
*ppv = NULL;
HRESULT hr = CLASS_E_CLASSNOTAVAILABLE;
if(IsEqualGUID(clsid, CLSID_AvsCamMft0))
{
IClassFactory *pClassFactory = new (std::nothrow) CClassFactory();
if(!pClassFactory)
{
return E_OUTOFMEMORY;
}
hr = pClassFactory->QueryInterface(riid, ppv);
pClassFactory->Release();
}
return hr;
}
//IUnknown methods
IFACEMETHODIMP QueryInterface(REFIID riid, void **ppvObject)
{
HRESULT hr = S_OK;
if(ppvObject == NULL)
{
return E_POINTER;
}
if(riid == IID_IUnknown)
{
*ppvObject = (IUnknown*)this;
}
else if(riid == IID_IClassFactory)
{
*ppvObject = (IClassFactory*)this;
}
else
{
*ppvObject = NULL;
return E_NOINTERFACE;
}
AddRef();
return hr;
}
IFACEMETHODIMP_(ULONG) AddRef()
{
return InterlockedIncrement(&m_cRef);
}
IFACEMETHODIMP_(ULONG) Release()
{
long cRef = InterlockedDecrement(&m_cRef);
if(cRef == 0)
{
delete this;
}
return cRef;
}
//IClassFactory Methods
IFACEMETHODIMP CreateInstance(_In_ IUnknown *punkOuter, _In_ REFIID riid, _Outptr_ void **ppv)
{
return punkOuter ? CLASS_E_NOAGGREGATION : MFT0CreateInstance(riid, ppv);
}
IFACEMETHODIMP LockServer(BOOL fLock)
{
if(fLock)
{
DllAddRef();
}
else
{
DllRelease();
}
return S_OK;
}
private:
CClassFactory() :
m_cRef(1)
{
DllAddRef();
}
~CClassFactory()
{
DllRelease();
}
long m_cRef;
};
STDAPI_(BOOL) DllMain(_In_ HINSTANCE hinst, DWORD reason, _In_opt_ void *)
{
if (reason == DLL_PROCESS_ATTACH)
{
g_hModule = (HMODULE)hinst;
DisableThreadLibraryCalls(hinst);
}
return TRUE;
}
//
// DllCanUnloadNow
//
/////////////////////////////////////////////////////////////////////////
__control_entrypoint(DllExport)
STDAPI DllCanUnloadNow()
{
return (g_cRefModule == 0) ? S_OK : S_FALSE;
}
/////////////////////////////////////////////////////////////////////////
//
// DllGetClassObject
//
/////////////////////////////////////////////////////////////////////////
_Check_return_
STDAPI DllGetClassObject(
_In_ REFCLSID rclsid,
_In_ REFIID riid,
_Outptr_ LPVOID FAR *ppv
)
{
return CClassFactory::CreateInstance(rclsid, riid, ppv);
}
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