QVideoFrame Class Reference

The QVideoFrame class represents a frame of video data. More...

#include <qvideoframe.h>

Collaboration diagram for QVideoFrame:

Classes
struct	PaintOptions

Public Types
enum	HandleType { NoHandle , RhiTextureHandle }
	Identifies the type of a video buffers handle. More...
enum	MapMode { NotMapped = 0x00 , ReadOnly = 0x01 , WriteOnly = 0x02 , ReadWrite = ReadOnly | WriteOnly }
	Enumerates how a video buffer's data is mapped to system memory. More...
enum	RotationAngle { Rotation0 = 0 , Rotation90 = 90 , Rotation180 = 180 , Rotation270 = 270 }
	The angle of the clockwise rotation that should be applied to a video frame before displaying. More...

Public Member Functions
	QVideoFrame ()
	Constructs a null video frame.
	QVideoFrame (const QVideoFrameFormat &format)
	Constructs a video frame of the given pixel format.
	QVideoFrame (const QVideoFrame &other)
	Constructs a shallow copy of other.
	~QVideoFrame ()
	Destroys a video frame.
	QVideoFrame (QVideoFrame &&other) noexcept=default
	Constructs a QVideoFrame by moving from other.
void	swap (QVideoFrame &other) noexcept
	Swaps the current video frame with other.
QVideoFrame &	operator= (const QVideoFrame &other)
	Moves other into this QVideoFrame.
bool	operator== (const QVideoFrame &other) const
bool	operator!= (const QVideoFrame &other) const
bool	isValid () const
	Identifies whether a video frame is valid.
QVideoFrameFormat::PixelFormat	pixelFormat () const
	Returns the pixel format of this video frame.
QVideoFrameFormat	surfaceFormat () const
	Returns the surface format of this video frame.
QVideoFrame::HandleType	handleType () const
	Returns the type of a video frame's handle.
QSize	size () const
	Returns the dimensions of a video frame.
int	width () const
	Returns the width of a video frame.
int	height () const
	Returns the height of a video frame.
bool	isMapped () const
	Identifies if a video frame's contents are currently mapped to system memory.
bool	isReadable () const
	Identifies if the mapped contents of a video frame were read from the frame when it was mapped.
bool	isWritable () const
	Identifies if the mapped contents of a video frame will be persisted when the frame is unmapped.
QVideoFrame::MapMode	mapMode () const
	Returns the mode a video frame was mapped to system memory in.
bool	map (QVideoFrame::MapMode mode)
	Maps the contents of a video frame to system (CPU addressable) memory.
void	unmap ()
	Releases the memory mapped by the map() function.
int	bytesPerLine (int plane) const
	Returns the number of bytes in a scan line of a plane.
uchar *	bits (int plane)
	Returns a pointer to the start of the frame data buffer for a plane.
const uchar *	bits (int plane) const
	Returns a pointer to the start of the frame data buffer for a plane.
int	mappedBytes (int plane) const
	Returns the number of bytes occupied by plane plane of the mapped frame data.
int	planeCount () const
	Returns the number of planes in the video frame.
qint64	startTime () const
	Returns the presentation time (in microseconds) when the frame should be displayed.
void	setStartTime (qint64 time)
	Sets the presentation time (in microseconds) when the frame should initially be displayed.
qint64	endTime () const
	Returns the presentation time (in microseconds) when a frame should stop being displayed.
void	setEndTime (qint64 time)
	Sets the presentation time (in microseconds) when a frame should stop being displayed.
void	setRotationAngle (RotationAngle)
	Sets the angle the frame should be rotated clockwise before displaying.
RotationAngle	rotationAngle () const
	Returns the angle the frame should be rotated clockwise before displaying.
void	setMirrored (bool)
	Sets the mirrored flag for the frame.
bool	mirrored () const
	Returns whether the frame should be mirrored before displaying.
QImage	toImage () const
	Based on the pixel format converts current video frame to image.
QString	subtitleText () const
	Returns the subtitle text that should be rendered together with this video frame.
void	setSubtitleText (const QString &text)
	Sets the subtitle text that should be rendered together with this video frame to text.
void	paint (QPainter *painter, const QRectF &rect, const PaintOptions &options)
	Uses a QPainter, {painter}, to render this QVideoFrame to rect.
	QVideoFrame (QAbstractVideoBuffer *buffer, const QVideoFrameFormat &format)
QAbstractVideoBuffer *	videoBuffer () const

Detailed Description

The QVideoFrame class represents a frame of video data.

\inmodule QtMultimedia

A QVideoFrame encapsulates the pixel data of a video frame, and information about the frame.

Video frames can come from several places - decoded \l {QMediaPlayer}{media}, a \l {QCamera}{camera}, or generated programmatically. The way pixels are described in these frames can vary greatly, and some pixel formats offer greater compression opportunities at the expense of ease of use.

The pixel contents of a video frame can be mapped to memory using the map() function. After a successful call to map(), the video data can be accessed through various functions. Some of the YUV pixel formats provide the data in several planes. The planeCount() method will return the amount of planes that being used.

While mapped, the video data of each plane can accessed using the bits() function, which returns a pointer to a buffer. The size of this buffer is given by the mappedBytes() function, and the size of each line is given by bytesPerLine(). The return value of the handle() function may also be used to access frame data using the internal buffer's native APIs (for example - an OpenGL texture handle).

A video frame can also have timestamp information associated with it. These timestamps can be used to determine when to start and stop displaying the frame.

QVideoFrame objects can consume a significant amount of memory or system resources and should not be held for longer than required by the application.

Note

Since video frames can be expensive to copy, QVideoFrame is explicitly shared, so any change made to a video frame will also apply to any copies.

Definition at line 25 of file qvideoframe.h.

Member Enumeration Documentation

HandleType

enum QVideoFrame::HandleType

Identifies the type of a video buffers handle.

\value NoHandle The buffer has no handle, its data can only be accessed by mapping the buffer. \value RhiTextureHandle The handle of the buffer is defined by The Qt Rendering Hardware Interface (RHI). RHI is Qt's internal graphics abstraction for 3D APIs, such as OpenGL, Vulkan, Metal, and Direct 3D.

See also

handleType()

Enumerator
NoHandle
RhiTextureHandle

Definition at line 29 of file qvideoframe.h.

MapMode

enum QVideoFrame::MapMode

Enumerates how a video buffer's data is mapped to system memory.

\value NotMapped The video buffer is not mapped to memory. \value ReadOnly The mapped memory is populated with data from the video buffer when mapped, but the content of the mapped memory may be discarded when unmapped. \value WriteOnly The mapped memory is uninitialized when mapped, but the possibly modified content will be used to populate the video buffer when unmapped. \value ReadWrite The mapped memory is populated with data from the video buffer, and the video buffer is repopulated with the content of the mapped memory when it is unmapped.

See also

mapMode(), map()

Enumerator
NotMapped
ReadOnly
WriteOnly
ReadWrite

Definition at line 35 of file qvideoframe.h.

RotationAngle

enum QVideoFrame::RotationAngle

The angle of the clockwise rotation that should be applied to a video frame before displaying.

\value Rotation0 No rotation required, the frame has correct orientation \value Rotation90 The frame should be rotated by 90 degrees \value Rotation180 The frame should be rotated by 180 degrees \value Rotation270 The frame should be rotated by 270 degrees

Enumerator
Rotation0
Rotation90
Rotation180
Rotation270

Definition at line 43 of file qvideoframe.h.

Constructor & Destructor Documentation

QVideoFrame() [1/5]

QVideoFrame::QVideoFrame

(

)

Constructs a null video frame.

Definition at line 95 of file qvideoframe.cpp.

QVideoFrame() [2/5]

QVideoFrame::QVideoFrame

(

const QVideoFrameFormat &

format

)

Constructs a video frame of the given pixel format.

Definition at line 123 of file qvideoframe.cpp.

References QVideoFramePrivate::buffer, QVideoTextureHelper::TextureDescription::bytesForSize(), QVideoTextureHelper::TextureDescription::strideForWidth(), and QVideoTextureHelper::textureDescription().

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QVideoFrame() [3/5]

QVideoFrame::QVideoFrame ( const QVideoFrame &  other )

default

Constructs a shallow copy of other.

Since QVideoFrame is explicitly shared, these two instances will reflect the same frame.

~QVideoFrame()

QVideoFrame::~QVideoFrame ( )

default

Destroys a video frame.

QVideoFrame() [4/5]

QVideoFrame::QVideoFrame ( QVideoFrame &&  other )

defaultnoexcept

Constructs a QVideoFrame by moving from other.

QVideoFrame() [5/5]

QVideoFrame::QVideoFrame	(	QAbstractVideoBuffer *	buffer,
		const QVideoFrameFormat &	format
	)

Constructs a video frame from a buffer with the given pixel format and size in pixels.

Note

This doesn't increment the reference count of the video buffer.

Definition at line 105 of file qvideoframe.cpp.

References QVideoFramePrivate::buffer.

Member Function Documentation

bits() [1/2]

uchar * QVideoFrame::bits

(

int

plane

)

Returns a pointer to the start of the frame data buffer for a plane.

This value is only valid while the frame data is \l {map()}{mapped}.

Changes made to data accessed via this pointer (when mapped with write access) are only guaranteed to have been persisted when unmap() is called and when the buffer has been mapped for writing.

See also

map(), mappedBytes(), bytesPerLine(), planeCount()

Since

5.4

Definition at line 520 of file qvideoframe.cpp.

References QAbstractVideoBuffer::MapData::data, QVideoFramePrivate::mapData, and QAbstractVideoBuffer::MapData::nPlanes.

Referenced by convertJPEG(), and QSGVivanteVideoMaterial::vivanteMapping().

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bits() [2/2]

const uchar * QVideoFrame::bits

(

int

plane

)

const

Returns a pointer to the start of the frame data buffer for a plane.

This value is only valid while the frame data is \l {map()}{mapped}.

If the buffer was not mapped with read access, the contents of this buffer will initially be uninitialized.

See also

map(), mappedBytes(), bytesPerLine(), planeCount()

Since

5.4

Definition at line 538 of file qvideoframe.cpp.

References QAbstractVideoBuffer::MapData::data, QVideoFramePrivate::mapData, and QAbstractVideoBuffer::MapData::nPlanes.

bytesPerLine()

int QVideoFrame::bytesPerLine

(

int

plane

)

const

Returns the number of bytes in a scan line of a plane.

This value is only valid while the frame data is \l {map()}{mapped}.

See also

bits(), map(), mappedBytes(), planeCount()

Since

5.4

Definition at line 501 of file qvideoframe.cpp.

References QAbstractVideoBuffer::MapData::bytesPerLine, QVideoFramePrivate::mapData, and QAbstractVideoBuffer::MapData::nPlanes.

Referenced by QSGVivanteVideoMaterial::vivanteMapping().

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endTime()

qint64 QVideoFrame::endTime

(

)

const

Returns the presentation time (in microseconds) when a frame should stop being displayed.

An invalid time is represented as -1.

Definition at line 605 of file qvideoframe.cpp.

References QVideoFramePrivate::endTime.

handleType()

QVideoFrame::HandleType QVideoFrame::handleType

(

)

const

Returns the type of a video frame's handle.

The handle type could either be NoHandle, meaning that the frame is memory based, or a RHI texture.

Definition at line 226 of file qvideoframe.cpp.

References QVideoFramePrivate::buffer, QAbstractVideoBuffer::handleType(), and NoHandle.

Referenced by QQuickVideoOutput::updatePaintNode().

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height()

int QVideoFrame::height

(

)

const

Returns the height of a video frame.

Definition at line 250 of file qvideoframe.cpp.

References QSize::height(), and size().

Referenced by convertCPU(), map(), and QSGVivanteVideoMaterial::vivanteMapping().

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isMapped()

bool QVideoFrame::isMapped

(

)

const

Identifies if a video frame's contents are currently mapped to system memory.

This is a convenience function which checks that the \l {QVideoFrame::MapMode}{MapMode} of the frame is not equal to QVideoFrame::NotMapped.

Returns true if the contents of the video frame are mapped to system memory, and false otherwise.

See also

mapMode(), QVideoFrame::MapMode

Definition at line 267 of file qvideoframe.cpp.

References QVideoFramePrivate::buffer, QAbstractVideoBuffer::mapMode(), and NotMapped.

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isReadable()

bool QVideoFrame::isReadable

(

)

const

Identifies if the mapped contents of a video frame were read from the frame when it was mapped.

This is a convenience function which checks if the \l {QVideoFrame::MapMode}{MapMode} contains the QVideoFrame::WriteOnly flag.

Returns true if the contents of the mapped memory were read from the video frame, and false otherwise.

See also

mapMode(), QVideoFrame::MapMode

Definition at line 302 of file qvideoframe.cpp.

References QVideoFramePrivate::buffer, QAbstractVideoBuffer::mapMode(), and ReadOnly.

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isValid()

bool QVideoFrame::isValid

(

)

const

Identifies whether a video frame is valid.

An invalid frame has no video buffer associated with it.

Returns true if the frame is valid, and false if it is not.

Definition at line 199 of file qvideoframe.cpp.

References QVideoFramePrivate::buffer, QVideoFramePrivate::format, QVideoFrameFormat::Format_Invalid, and QVideoFrameFormat::pixelFormat().

Referenced by QSGVivanteVideoMaterial::bind(), paint(), AVFCameraRenderer::syncHandleViewfinderFrame(), toImage(), QQuickVideoOutput::updatePaintNode(), and QVideoWindowPrivate::updateTextures().

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isWritable()

bool QVideoFrame::isWritable

(

)

const

Identifies if the mapped contents of a video frame will be persisted when the frame is unmapped.

This is a convenience function which checks if the \l {QVideoFrame::MapMode}{MapMode} contains the QVideoFrame::WriteOnly flag.

Returns true if the video frame will be updated when unmapped, and false otherwise.

Note

The result of altering the data of a frame that is mapped in read-only mode is undefined. Depending on the buffer implementation the changes may be persisted, or worse alter a shared buffer.

See also

mapMode(), QVideoFrame::MapMode

Definition at line 286 of file qvideoframe.cpp.

References QVideoFramePrivate::buffer, QAbstractVideoBuffer::mapMode(), and WriteOnly.

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map()

bool QVideoFrame::map

(

QVideoFrame::MapMode

mode

)

Maps the contents of a video frame to system (CPU addressable) memory.

In some cases the video frame data might be stored in video memory or otherwise inaccessible memory, so it is necessary to map a frame before accessing the pixel data. This may involve copying the contents around, so avoid mapping and unmapping unless required.

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

While mapped the contents of a video frame can be accessed directly through the pointer returned by the bits() function.

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 video frame contents.

If the video frame has been mapped in read only mode, it is permissible to map it multiple times in read only mode (and unmap it a corresponding number of times). In all other cases it is necessary to unmap the frame first before mapping a second time.

Note

Writing to memory that is mapped as read-only is undefined, and may result in changes to shared data or crashes.

Returns true if the frame was mapped to memory in the given mode and false otherwise.

See also

unmap(), mapMode(), bits()

Definition at line 347 of file qvideoframe.cpp.

References QVideoFramePrivate::buffer, QAbstractVideoBuffer::MapData::bytesPerLine, QAbstractVideoBuffer::MapData::data, QVideoFramePrivate::format, QVideoFrameFormat::Format_ABGR8888, QVideoFrameFormat::Format_ARGB8888, QVideoFrameFormat::Format_ARGB8888_Premultiplied, QVideoFrameFormat::Format_AYUV, QVideoFrameFormat::Format_AYUV_Premultiplied, QVideoFrameFormat::Format_BGRA8888, QVideoFrameFormat::Format_BGRA8888_Premultiplied, QVideoFrameFormat::Format_BGRX8888, QVideoFrameFormat::Format_IMC1, QVideoFrameFormat::Format_IMC2, QVideoFrameFormat::Format_IMC3, QVideoFrameFormat::Format_IMC4, QVideoFrameFormat::Format_Invalid, QVideoFrameFormat::Format_Jpeg, QVideoFrameFormat::Format_NV12, QVideoFrameFormat::Format_NV21, QVideoFrameFormat::Format_P010, QVideoFrameFormat::Format_P016, QVideoFrameFormat::Format_RGBA8888, QVideoFrameFormat::Format_RGBX8888, QVideoFrameFormat::Format_SamplerExternalOES, QVideoFrameFormat::Format_SamplerRect, QVideoFrameFormat::Format_UYVY, QVideoFrameFormat::Format_XBGR8888, QVideoFrameFormat::Format_XRGB8888, QVideoFrameFormat::Format_Y16, QVideoFrameFormat::Format_Y8, QVideoFrameFormat::Format_YUV420P, QVideoFrameFormat::Format_YUV420P10, QVideoFrameFormat::Format_YUV422P, QVideoFrameFormat::Format_YUYV, QVideoFrameFormat::Format_YV12, height(), lock, QAbstractVideoBuffer::map(), QVideoFramePrivate::mapData, QAbstractVideoBuffer::mapMode(), QVideoFramePrivate::mapMutex, QVideoFramePrivate::mappedCount, NotMapped, QAbstractVideoBuffer::MapData::nPlanes, QVideoFrameFormat::pixelFormat(), Q_ASSERT, ReadOnly, and QAbstractVideoBuffer::MapData::size.

Referenced by convertCPU(), convertJPEG(), and QSGVivanteVideoMaterial::vivanteMapping().

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mapMode()

QVideoFrame::MapMode QVideoFrame::mapMode

(

)

const

Returns the mode a video frame was mapped to system memory in.

See also

map(), QVideoFrame::MapMode

Definition at line 312 of file qvideoframe.cpp.

References QVideoFramePrivate::buffer, QAbstractVideoBuffer::mapMode(), and NotMapped.

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mappedBytes()

int QVideoFrame::mappedBytes

(

int

plane

)

const

Returns the number of bytes occupied by plane plane of the mapped frame data.

This value is only valid while the frame data is \l {map()}{mapped}.

See also

map()

Definition at line 552 of file qvideoframe.cpp.

References QVideoFramePrivate::mapData, QAbstractVideoBuffer::MapData::nPlanes, and QAbstractVideoBuffer::MapData::size.

Referenced by convertJPEG().

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mirrored()

bool QVideoFrame::mirrored

(

)

const

Returns whether the frame should be mirrored before displaying.

Definition at line 666 of file qvideoframe.cpp.

References QVideoFramePrivate::mirrored.

Referenced by QVideoWindowPrivate::render(), setMirrored(), QSGVideoNode::setTexturedRectGeometry(), and toImage().

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operator!=()

bool QVideoFrame::operator!=

(

const QVideoFrame &

other

)

const

Returns

true if this QVideoFrame and other do not reflect the same frame.

Definition at line 182 of file qvideoframe.cpp.

References other().

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operator=()

QVideoFrame & QVideoFrame::operator= ( const QVideoFrame &  other )

default

Moves other into this QVideoFrame.

Assigns the contents of other to this video frame.

Since QVideoFrame is explicitly shared, these two instances will reflect the same frame.

operator==()

bool QVideoFrame::operator==

(

const QVideoFrame &

other

)

const

Returns

true if this QVideoFrame and other reflect the same frame.

Definition at line 173 of file qvideoframe.cpp.

References other().

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paint()

void QVideoFrame::paint	(	QPainter *	painter,
		const QRectF &	rect,
		const PaintOptions &	options
	)

Uses a QPainter, {painter}, to render this QVideoFrame to rect.

The PaintOptions options can be used to specify a background color and how rect should be filled with the video.

Note

that rendering will usually happen without hardware acceleration when using this method.

Definition at line 713 of file qvideoframe.cpp.

References QVideoFrame::PaintOptions::aspectRatioMode, QVideoFrame::PaintOptions::backgroundColor, Qt::black, QRectF::bottom(), QRectF::center(), QVideoFrame::PaintOptions::DontDrawSubtitles, QPainter::drawImage(), QPainter::fillRect(), QRectF::height(), QString::isEmpty(), isValid(), Qt::KeepAspectRatio, layout, QRectF::left(), QChar::LineSeparator, map, QRectF::moveCenter(), painter, QVideoFrame::PaintOptions::paintFlags, ReadOnly, rect, QString::replace(), QRectF::right(), rotationAngle(), QPainter::setTransform(), size(), QRectF::size(), QVideoFramePrivate::subtitleText, text, this, toImage(), QRectF::top(), QRectF::topLeft(), QSizeF::toSize(), QPainter::transform(), QTransform::translate(), Qt::transparent, QSizeF::transpose(), unmap(), QLayout::update(), QPointF::x(), and QPointF::y().

Referenced by QVideoWindowPrivate::render().

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pixelFormat()

QVideoFrameFormat::PixelFormat QVideoFrame::pixelFormat

(

)

const

Returns the pixel format of this video frame.

Definition at line 207 of file qvideoframe.cpp.

References QVideoFramePrivate::format, QVideoFrameFormat::Format_Invalid, and QVideoFrameFormat::pixelFormat().

Referenced by convertCPU(), QQuickVideoOutput::updatePaintNode(), and QSGVivanteVideoMaterial::vivanteMapping().

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planeCount()

int QVideoFrame::planeCount

(

)

const

Returns the number of planes in the video frame.

See also

map()

Since

5.4

Definition at line 566 of file qvideoframe.cpp.

References QVideoFramePrivate::format, and QVideoFrameFormat::planeCount().

Referenced by QSGVivanteVideoMaterial::vivanteMapping().

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rotationAngle()

QVideoFrame::RotationAngle QVideoFrame::rotationAngle

(

)

const

Returns the angle the frame should be rotated clockwise before displaying.

Definition at line 649 of file qvideoframe.cpp.

References Rotation0, and QVideoFramePrivate::rotationAngle.

Referenced by paint(), QVideoWindowPrivate::render(), QSGVideoNode::setTexturedRectGeometry(), and toImage().

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setEndTime()

void QVideoFrame::setEndTime

(

qint64

time

)

Sets the presentation time (in microseconds) when a frame should stop being displayed.

An invalid time is represented as -1.

Definition at line 618 of file qvideoframe.cpp.

References QVideoFramePrivate::endTime, and time.

Referenced by QAndroidCamera::frameAvailable(), and QFFmpeg::VideoRenderer::renderInternal().

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setMirrored()

void QVideoFrame::setMirrored

(

bool

mirrored

)

Sets the mirrored flag for the frame.

Definition at line 657 of file qvideoframe.cpp.

References QVideoFramePrivate::mirrored, and mirrored().

Referenced by QAndroidCamera::frameAvailable().

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setRotationAngle()

void QVideoFrame::setRotationAngle

(

QVideoFrame::RotationAngle

angle

)

Sets the angle the frame should be rotated clockwise before displaying.

Definition at line 640 of file qvideoframe.cpp.

References QVideoFramePrivate::rotationAngle.

Referenced by QAndroidCamera::frameAvailable().

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setStartTime()

void QVideoFrame::setStartTime

(

qint64

time

)

Sets the presentation time (in microseconds) when the frame should initially be displayed.

An invalid time is represented as -1.

Definition at line 592 of file qvideoframe.cpp.

References QVideoFramePrivate::startTime, and time.

Referenced by QAndroidCamera::frameAvailable(), and QFFmpeg::VideoRenderer::renderInternal().

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setSubtitleText()

void QVideoFrame::setSubtitleText

(

const QString &

text

)

Sets the subtitle text that should be rendered together with this video frame to text.

Definition at line 698 of file qvideoframe.cpp.

References QVideoFramePrivate::subtitleText, and text.

Referenced by QPlatformVideoSink::setVideoFrame().

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size()

QSize QVideoFrame::size

(

)

const

Returns the dimensions of a video frame.

Definition at line 234 of file qvideoframe.cpp.

References QVideoFramePrivate::format, and QVideoFrameFormat::frameSize().

Referenced by height(), paint(), QVideoWindowPrivate::render(), and width().

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startTime()

qint64 QVideoFrame::startTime

(

)

const

Returns the presentation time (in microseconds) when the frame should be displayed.

An invalid time is represented as -1.

Definition at line 579 of file qvideoframe.cpp.

References QVideoFramePrivate::startTime.

subtitleText()

QString QVideoFrame::subtitleText

(

)

const

Returns the subtitle text that should be rendered together with this video frame.

Definition at line 690 of file qvideoframe.cpp.

References QVideoFramePrivate::subtitleText.

Referenced by QVideoWindowPrivate::updateSubtitle().

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surfaceFormat()

QVideoFrameFormat QVideoFrame::surfaceFormat

(

)

const

Returns the surface format of this video frame.

Definition at line 215 of file qvideoframe.cpp.

References QVideoFramePrivate::format.

Referenced by QVideoWindowPrivate::render(), toImage(), and QVideoWindowPrivate::updateTextures().

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swap()

void QVideoFrame::swap ( QVideoFrame &  other )

inlinenoexcept

Swaps the current video frame with other.

Definition at line 58 of file qvideoframe.h.

References d, and other().

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toImage()

QImage QVideoFrame::toImage

(

)

const

Based on the pixel format converts current video frame to image.

Since

5.15

Definition at line 675 of file qvideoframe.cpp.

References QVideoFramePrivate::image, QImage::isNull(), isValid(), mirrored(), qImageFromVideoFrame(), rotationAngle(), surfaceFormat(), and QVideoFrameFormat::TopToBottom.

Referenced by paint().

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unmap()

void QVideoFrame::unmap

(

)

Releases the memory mapped by the map() function.

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

unmap() should not be called if map() function failed.

See also

map()

Definition at line 472 of file qvideoframe.cpp.

References QVideoFramePrivate::buffer, lock, QVideoFramePrivate::mapData, QVideoFramePrivate::mapMutex, QVideoFramePrivate::mappedCount, qWarning, and QAbstractVideoBuffer::unmap().

Referenced by convertCPU(), convertJPEG(), and paint().

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videoBuffer()

QAbstractVideoBuffer * QVideoFrame::videoBuffer

(

)

const

Definition at line 114 of file qvideoframe.cpp.

References QVideoFramePrivate::buffer.

width()

int QVideoFrame::width

(

)

const

Returns the width of a video frame.

Definition at line 242 of file qvideoframe.cpp.

References size(), and QSize::width().

Referenced by convertCPU(), and QSGVivanteVideoMaterial::vivanteMapping().

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---

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

• qtmultimedia/src/multimedia/video/qvideoframe.h
• qtmultimedia/src/multimedia/video/qvideoframe.cpp