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/****************************************************************************
**
** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** 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 Digia. For licensing terms and
** conditions see http://qt.digia.com/licensing. For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Digia gives you certain additional
** rights. These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#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 m_cRef;
}
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