QQnxCameraFrameBuffer Class Reference

#include <qqnxcameraframebuffer_p.h>

Inheritance diagram for QQnxCameraFrameBuffer:

Collaboration diagram for QQnxCameraFrameBuffer:

Public Member Functions
	QQnxCameraFrameBuffer (const camera_buffer_t *buffer, QRhi *rhi=nullptr)
	QQnxCameraFrameBuffer (const QQnxCameraFrameBuffer &)=delete
QQnxCameraFrameBuffer &	operator= (const QQnxCameraFrameBuffer &)=delete
QVideoFrame::MapMode	mapMode () const override
MapData	map (QVideoFrame::MapMode mode) override
	Independently maps the planes of a video buffer to memory.
void	unmap () override
	Releases the memory mapped by the map() function.
QVideoFrameFormat::PixelFormat	pixelFormat () const
QSize	size () const
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

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

Detailed Description

Definition at line 29 of file qqnxcameraframebuffer_p.h.

Constructor & Destructor Documentation

QQnxCameraFrameBuffer() [1/2]

QT_BEGIN_NAMESPACE QQnxCameraFrameBuffer::QQnxCameraFrameBuffer ( const camera_buffer_t *  buffer, QRhi *  rhi = nullptr  )

explicit

Definition at line 262 of file qqnxcameraframebuffer.cpp.

References frameSize(), and mapData().

Here is the call graph for this function:

QQnxCameraFrameBuffer() [2/2]

QQnxCameraFrameBuffer::QQnxCameraFrameBuffer ( const QQnxCameraFrameBuffer &  )

delete

Member Function Documentation

map()

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

overridevirtual

Independently maps the planes of a video buffer to memory.

The map mode indicates whether the contents of the mapped memory should be read from and/or written to the buffer. If the map mode includes the QVideoFrame::ReadOnly flag the mapped memory will be populated with the content of the buffer when initially mapped. If the map mode includes the QVideoFrame::WriteOnly flag the content of the possibly modified mapped memory will be written back to the buffer when unmapped.

When access to the data is no longer needed be sure to call the unmap() function to release the mapped memory and possibly update the buffer contents.

Returns the number of planes in the mapped video data. For each plane the line stride of that plane will be returned in bytesPerLine, and a pointer to the plane data will be returned in data. The accumulative size of the mapped data is returned in numBytes.

Not all buffer implementations will map more than the first plane, if this returns a single plane for a planar format the additional planes will have to be calculated from the line stride of the first plane and the frame height. Mapping a buffer with QVideoFrame will do this for you.

To implement this function create a derivative of QAbstractPlanarVideoBuffer and implement its map function instance instead.

Since

5.4

Implements QAbstractVideoBuffer.

Definition at line 285 of file qqnxcameraframebuffer.cpp.

mapMode()

QVideoFrame::MapMode QQnxCameraFrameBuffer::mapMode ( ) const

overridevirtual

Implements QAbstractVideoBuffer.

Definition at line 280 of file qqnxcameraframebuffer.cpp.

References QVideoFrame::ReadOnly.

operator=()

QQnxCameraFrameBuffer & QQnxCameraFrameBuffer::operator= ( const QQnxCameraFrameBuffer &  )

delete

pixelFormat()

QVideoFrameFormat::PixelFormat QQnxCameraFrameBuffer::pixelFormat

(

)

const

Definition at line 294 of file qqnxcameraframebuffer.cpp.

size()

QSize QQnxCameraFrameBuffer::size

(

)

const

Definition at line 299 of file qqnxcameraframebuffer.cpp.

unmap()

void QQnxCameraFrameBuffer::unmap ( )

overridevirtual

Releases the memory mapped by the map() function.

If the \l {QVideoFrame::MapMode}{MapMode} included the QVideoFrame::WriteOnly flag this will write the current content of the mapped memory back to the video frame.

See also

map()

Implements QAbstractVideoBuffer.

Definition at line 290 of file qqnxcameraframebuffer.cpp.

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

• qtmultimedia/src/plugins/multimedia/qnx/camera/qqnxcameraframebuffer_p.h
• qtmultimedia/src/plugins/multimedia/qnx/camera/qqnxcameraframebuffer.cpp