QnxRasterBuffer Class Reference

Inheritance diagram for QnxRasterBuffer:

Collaboration diagram for QnxRasterBuffer:

Public Member Functions
	QnxRasterBuffer (QQnxWindowGrabber *windowGrabber)
MapData	map (QVideoFrame::MapMode mode) override
	Maps the planes of a video buffer to memory.
void	unmap () override
	Releases the memory mapped by the map() function.
QVideoFrameFormat	format () const override
	Gets \l QVideoFrameFormat of the underlying video buffer.
	QnxRasterBuffer (QQnxWindowGrabber *windowGrabber)
MapData	map (QVideoFrame::MapMode mode) override
	Maps the planes of a video buffer to memory.
void	unmap () override
	Releases the memory mapped by the map() function.
QVideoFrameFormat	format () const override
	Gets \l QVideoFrameFormat of the underlying video buffer.
Public Member Functions inherited from QAbstractVideoBuffer
virtual	~QAbstractVideoBuffer ()
	\variable QAbstractVideoBuffer::MapData::planeCount

Detailed Description

Definition at line 98 of file qqnxmediaplayer.cpp.

Constructor & Destructor Documentation

QnxRasterBuffer() [1/2]

QnxRasterBuffer::QnxRasterBuffer ( QQnxWindowGrabber * windowGrabber )

inline

Definition at line 101 of file qqnxmediaplayer.cpp.

QnxRasterBuffer() [2/2]

QnxRasterBuffer::QnxRasterBuffer ( QQnxWindowGrabber * windowGrabber )

inline

Definition at line 101 of file qqnxmediaplayer.cpp.

Member Function Documentation

format() [1/2]

QVideoFrameFormat QnxRasterBuffer::format ( ) const

inlineoverridevirtual

Gets \l QVideoFrameFormat of the underlying video buffer.

The format must be available upon construction of \l QVideoFrame. QVideoFrame will contain won instance of the given format, that can be detached and modified.

Implements QAbstractVideoBuffer.

Definition at line 128 of file qqnxmediaplayer.cpp.

format() [2/2]

QVideoFrameFormat QnxRasterBuffer::format ( ) const

inlineoverridevirtual

Gets \l QVideoFrameFormat of the underlying video buffer.

The format must be available upon construction of \l QVideoFrame. QVideoFrame will contain won instance of the given format, that can be detached and modified.

Implements QAbstractVideoBuffer.

Definition at line 128 of file qqnxmediaplayer.cpp.

map() [1/2]

MapData QnxRasterBuffer::map ( QVideoFrame::MapMode mode )

inlineoverridevirtual

Maps the planes of a video buffer to memory.

Returns a \l MapData structure that contains information about the plane layout of the mapped current video data. If the mapping fails, the method returns the default structure. For CPU memory buffers, the data is considered as already mapped, so the function just returns the plane layout of the preallocated underlying data.

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, the \l unmap function is called to release the mapped memory and possibly update the buffer contents.

If the format of the video data is multiplanar, the method may map the whole pixel data as a single plane. In this case, mapping a buffer with \l QVideoFrame will calculate additional planes from the specified line stride of the first plane, the frame height, and the data size.

Implements QAbstractVideoBuffer.

Definition at line 103 of file qqnxmediaplayer.cpp.

map() [2/2]

MapData QnxRasterBuffer::map ( QVideoFrame::MapMode mode )

inlineoverridevirtual

Maps the planes of a video buffer to memory.

Returns a \l MapData structure that contains information about the plane layout of the mapped current video data. If the mapping fails, the method returns the default structure. For CPU memory buffers, the data is considered as already mapped, so the function just returns the plane layout of the preallocated underlying data.

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, the \l unmap function is called to release the mapped memory and possibly update the buffer contents.

If the format of the video data is multiplanar, the method may map the whole pixel data as a single plane. In this case, mapping a buffer with \l QVideoFrame will calculate additional planes from the specified line stride of the first plane, the frame height, and the data size.

Implements QAbstractVideoBuffer.

Definition at line 103 of file qqnxmediaplayer.cpp.

unmap() [1/2]

void QnxRasterBuffer::unmap ( )

inlineoverridevirtual

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.

For CPU video buffers, the function may be not overridden. The default implementation of unmap does nothing.

See also

map()

Reimplemented from QAbstractVideoBuffer.

Definition at line 123 of file qqnxmediaplayer.cpp.

unmap() [2/2]

void QnxRasterBuffer::unmap ( )

inlineoverridevirtual

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.

For CPU video buffers, the function may be not overridden. The default implementation of unmap does nothing.

See also

map()

Reimplemented from QAbstractVideoBuffer.

Definition at line 123 of file qqnxmediaplayer.cpp.

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

• qtmultimedia/src/plugins/multimedia/qnx/mediaplayer/qqnxmediaplayer.cpp (3fde4d022493698e26893d592b15ac80cbb3e7e2)