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// Copyright (C) 2021 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#include "qwindowsmediafoundation_p.h"
#include <QtCore/qdebug.h>
QT_BEGIN_NAMESPACE
namespace {
Q_GLOBAL_STATIC(QWindowsMediaFoundation, s_wmf);
template <typename T>
bool setProcAddress(QSystemLibrary &lib, T &f, const char name[])
{
f = reinterpret_cast<T>(lib.resolve(name));
return static_cast<bool>(f);
}
} // namespace
QWindowsMediaFoundation *QWindowsMediaFoundation::instance()
{
if (s_wmf->valid())
return s_wmf;
return nullptr;
}
QWindowsMediaFoundation::QWindowsMediaFoundation()
{
if (!m_mfplat.load(false))
return;
m_valid = setProcAddress(m_mfplat, mfStartup, "MFStartup")
&& setProcAddress(m_mfplat, mfShutdown, "MFShutdown")
&& setProcAddress(m_mfplat, mfCreateMediaType, "MFCreateMediaType")
&& setProcAddress(m_mfplat, mfCreateMemoryBuffer, "MFCreateMemoryBuffer")
&& setProcAddress(m_mfplat, mfCreateSample, "MFCreateSample");
Q_ASSERT(m_valid); // If it is not valid at this point, we have a programming bug
}
QWindowsMediaFoundation::~QWindowsMediaFoundation() = default;
bool QWindowsMediaFoundation::valid() const
{
return m_valid;
}
QMFRuntimeInit::QMFRuntimeInit(QWindowsMediaFoundation *wmf)
: m_wmf{ wmf }, m_initResult{ wmf ? m_wmf->mfStartup(MF_VERSION, MFSTARTUP_FULL) : E_FAIL }
{
if (m_initResult != S_OK)
qErrnoWarning(m_initResult, "Failed to initialize Windows Media Foundation");
}
QMFRuntimeInit::~QMFRuntimeInit()
{
// According to documentation MFShutdown should be called
// also when MFStartup failed. This is wrong.
if (FAILED(m_initResult))
return;
const HRESULT hr = m_wmf->mfShutdown();
if (hr != S_OK)
qErrnoWarning(hr, "Failed to shut down Windows Media Foundation");
}
QT_END_NAMESPACE
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