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/****************************************************************************
**
** Copyright (C) 2021 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:COMM$
**
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** $QT_END_LICENSE$
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
**
****************************************************************************/
#include "mfactivate.h"
#include <mfapi.h>
MFAbstractActivate::MFAbstractActivate()
: m_attributes(0)
, m_cRef(1)
{
MFCreateAttributes(&m_attributes, 0);
}
MFAbstractActivate::~MFAbstractActivate()
{
if (m_attributes)
m_attributes->Release();
}
HRESULT MFAbstractActivate::QueryInterface(REFIID riid, LPVOID *ppvObject)
{
if (!ppvObject)
return E_POINTER;
if (riid == IID_IMFActivate) {
*ppvObject = static_cast<IMFActivate*>(this);
} else if (riid == IID_IMFAttributes) {
*ppvObject = static_cast<IMFAttributes*>(this);
} else if (riid == IID_IUnknown) {
*ppvObject = static_cast<IUnknown*>(static_cast<IMFActivate*>(this));
} else {
*ppvObject = NULL;
return E_NOINTERFACE;
}
AddRef();
return S_OK;
}
ULONG MFAbstractActivate::AddRef(void)
{
return InterlockedIncrement(&m_cRef);
}
ULONG MFAbstractActivate::Release(void)
{
ULONG cRef = InterlockedDecrement(&m_cRef);
if (cRef == 0)
delete this;
return cRef;
}
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