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// Copyright (C) 2016 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 "qmemoryvideobuffer_p.h"
QT_BEGIN_NAMESPACE
/*!
\class QMemoryVideoBuffer
\brief The QMemoryVideoBuffer class provides a system memory allocated video data buffer.
\internal
QMemoryVideoBuffer is the default video buffer for allocating system memory. It may be used to
allocate memory for a QVideoFrame without implementing your own QAbstractVideoBuffer.
*/
/*!
Constructs a video buffer with an image stride of \a bytesPerLine from a byte \a array.
*/
QMemoryVideoBuffer::QMemoryVideoBuffer(QByteArray data, int bytesPerLine)
: QAbstractVideoBuffer(QVideoFrame::NoHandle),
m_bytesPerLine(bytesPerLine),
m_data(std::move(data))
{
}
/*!
Destroys a system memory allocated video buffer.
*/
QMemoryVideoBuffer::~QMemoryVideoBuffer() = default;
/*!
\reimp
*/
QVideoFrame::MapMode QMemoryVideoBuffer::mapMode() const
{
return m_mapMode;
}
/*!
\reimp
*/
QAbstractVideoBuffer::MapData QMemoryVideoBuffer::map(QVideoFrame::MapMode mode)
{
MapData mapData;
if (m_mapMode == QVideoFrame::NotMapped && m_data.size() && mode != QVideoFrame::NotMapped) {
m_mapMode = mode;
mapData.nPlanes = 1;
mapData.bytesPerLine[0] = m_bytesPerLine;
// avoid detaching and extra copying in case the underlyingByteArray is
// being held by textures or anything else.
if (mode == QVideoFrame::ReadOnly)
mapData.data[0] = reinterpret_cast<uchar *>(const_cast<char*>(m_data.constData()));
else
mapData.data[0] = reinterpret_cast<uchar *>(m_data.data());
mapData.size[0] = m_data.size();
}
return mapData;
}
/*!
\reimp
*/
void QMemoryVideoBuffer::unmap()
{
m_mapMode = QVideoFrame::NotMapped;
}
/*!
\reimp
*/
QByteArray QMemoryVideoBuffer::underlyingByteArray(int plane) const
{
return plane == 0 ? m_data : QByteArray{};
}
QT_END_NAMESPACE
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