QMemoryVideoBuffer Class Reference

The QMemoryVideoBuffer class provides a system memory allocated video data buffer. More...

#include <qmemoryvideobuffer_p.h>

Inheritance diagram for QMemoryVideoBuffer:

Collaboration diagram for QMemoryVideoBuffer:

Public Member Functions
	QMemoryVideoBuffer (const QByteArray &data, int bytesPerLine)
	Constructs a video buffer with an image stride of bytesPerLine from a byte array.
	~QMemoryVideoBuffer ()
	Destroys a system memory allocated video buffer.
QVideoFrame::MapMode	mapMode () const override
	\reimp
MapData	map (QVideoFrame::MapMode mode) override
	\reimp
void	unmap () override
	\reimp
Public Member Functions inherited from QAbstractVideoBuffer
	QAbstractVideoBuffer (QVideoFrame::HandleType type, QRhi *rhi=nullptr)
	Constructs an abstract video buffer of the given type.
virtual	~QAbstractVideoBuffer ()
	Destroys an abstract video buffer.
QVideoFrame::HandleType	handleType () const
	Returns the type of a video buffer's handle.
QRhi *	rhi () const
	Returns the QRhi instance.
virtual QVideoFrame::MapMode	mapMode () const =0
virtual MapData	map (QVideoFrame::MapMode mode)=0
	Independently maps the planes of a video buffer to memory.
virtual void	unmap ()=0
	Releases the memory mapped by the map() function.
virtual std::unique_ptr< QVideoFrameTextures >	mapTextures (QRhi *)
virtual quint64	textureHandle (int) const
	Returns a texture handle to the data buffer.
virtual QMatrix4x4	externalTextureMatrix () const

Public Attributes
int	bytesPerLine = 0
QVideoFrame::MapMode	m_mapMode = QVideoFrame::NotMapped
QByteArray	data

Additional Inherited Members
Protected Attributes inherited from QAbstractVideoBuffer
QVideoFrame::HandleType	m_type
QRhi *	m_rhi = nullptr

Detailed Description

The QMemoryVideoBuffer class provides a system memory allocated video data buffer.

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.

Definition at line 23 of file qmemoryvideobuffer_p.h.

Constructor & Destructor Documentation

QMemoryVideoBuffer()

QMemoryVideoBuffer::QMemoryVideoBuffer	(	const QByteArray &	data,
		int	bytesPerLine
	)

Constructs a video buffer with an image stride of bytesPerLine from a byte array.

Definition at line 20 of file qmemoryvideobuffer.cpp.

References bytesPerLine.

~QMemoryVideoBuffer()

QMemoryVideoBuffer::~QMemoryVideoBuffer ( )

default

Destroys a system memory allocated video buffer.

Member Function Documentation

map()

QAbstractVideoBuffer::MapData QMemoryVideoBuffer::map ( QVideoFrame::MapMode  mode )

overridevirtual

\reimp

Implements QAbstractVideoBuffer.

Definition at line 43 of file qmemoryvideobuffer.cpp.

References QAbstractVideoBuffer::MapData::bytesPerLine, bytesPerLine, QAbstractVideoBuffer::MapData::data, m_mapMode, mapData(), QVideoFrame::NotMapped, QAbstractVideoBuffer::MapData::nPlanes, and QAbstractVideoBuffer::MapData::size.

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mapMode()

QVideoFrame::MapMode QMemoryVideoBuffer::mapMode ( ) const

overridevirtual

\reimp

Implements QAbstractVideoBuffer.

Definition at line 35 of file qmemoryvideobuffer.cpp.

References m_mapMode.

unmap()

void QMemoryVideoBuffer::unmap ( )

overridevirtual

\reimp

Implements QAbstractVideoBuffer.

Definition at line 61 of file qmemoryvideobuffer.cpp.

References m_mapMode, and QVideoFrame::NotMapped.

Member Data Documentation

bytesPerLine

int QMemoryVideoBuffer::bytesPerLine = 0

Definition at line 34 of file qmemoryvideobuffer_p.h.

Referenced by QMemoryVideoBuffer(), and map().

data

QByteArray QMemoryVideoBuffer::data

Definition at line 36 of file qmemoryvideobuffer_p.h.

m_mapMode

QVideoFrame::MapMode QMemoryVideoBuffer::m_mapMode = QVideoFrame::NotMapped

Definition at line 35 of file qmemoryvideobuffer_p.h.

Referenced by map(), mapMode(), and unmap().

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The documentation for this class was generated from the following files:

• qtmultimedia/src/multimedia/video/qmemoryvideobuffer_p.h
• qtmultimedia/src/multimedia/video/qmemoryvideobuffer.cpp