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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.
**
** $QT_END_LICENSE$
**
**
**
**
**
**
**
**
**
**
**
**
**
**
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**
**
**
****************************************************************************/
#ifndef DIRECTSHOWUTILS_H
#define DIRECTSHOWUTILS_H
#include "directshowglobal.h"
QT_BEGIN_NAMESPACE
namespace DirectShowUtils
{
template <typename T>
void safeRelease(T **iface) {
if (!iface)
return;
if (!*iface)
return;
(*iface)->Release();
*iface = nullptr;
}
template <typename T>
struct ScopedSafeRelease
{
T **iunknown;
~ScopedSafeRelease()
{
DirectShowUtils::safeRelease(iunknown);
}
};
bool getPin(IBaseFilter *filter, PIN_DIRECTION pinDirection, REFGUID category, IPin **pin, HRESULT *hrOut);
bool isPinConnected(IPin *pin, HRESULT *hrOut = nullptr);
bool hasPinDirection(IPin *pin, PIN_DIRECTION direction, HRESULT *hrOut = nullptr);
bool matchPin(IPin *pin, PIN_DIRECTION pinDirection, BOOL shouldBeConnected, HRESULT *hrOut = nullptr);
bool findUnconnectedPin(IBaseFilter *filter, PIN_DIRECTION pinDirection, IPin **pin, HRESULT *hrOut = nullptr);
bool connectFilters(IGraphBuilder *graph, IPin *outputPin, IBaseFilter *filter, HRESULT *hrOut = nullptr);
bool connectFilters(IGraphBuilder *graph, IBaseFilter *filter, IPin *inputPin, HRESULT *hrOut = nullptr);
bool connectFilters(IGraphBuilder *graph,
IBaseFilter *upstreamFilter,
IBaseFilter *downstreamFilter,
bool autoConnect = false,
HRESULT *hrOut = nullptr);
void CoInitializeIfNeeded();
void CoUninitializeIfNeeded();
}
QT_END_NAMESPACE
#endif // DIRECTSHOWUTILS_H
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