The video stream interface. More...

#include "murl_i_video_stream.h"

Inheritance diagram for Murl::IVideoStream:

Public Member Functions
	~IVideoStream () override
	The destructor.

virtual IVideoStream *	Clone () const =0
	Create a clone of the video stream object. More...

virtual IVideoStream *	Clone (IEnums::PixelFormat pixelFormat) const =0
	Create a clone of the video with a specified pixel format. More...

virtual IVideoStream *	Clone (IEnums::PixelFormat pixelFormat, UInt32 pixelSizeX, UInt32 pixelSizeY) const =0
	Create a clone of the video with a specified pixel format and size. More...

virtual IVideoStream *	Clone (IEnums::PixelFormat pixelFormat, UInt32 pixelSizeX, UInt32 pixelSizeY, IEnums::MipMapGenerationMode mipMapGen) const =0
	Create a clone with a specified pixel format and size and optional mip-mapping. More...

virtual UInt32	GetNumberOfFrames () const =0
	Get the total number of frames. More...

virtual UInt32	GetFrameIndex (Double startTime) const =0
	Get the index of the frame at a given start time. More...

virtual Double	GetStartTime (UInt32 frameIndex) const =0
	Get the start time of a frame at a given index. More...

virtual Double	GetFrameRate () const =0
	Get the number of frames per second. More...

virtual Double	GetFrameDuration () const =0
	Get the duration of a single frame, i.e. More...

virtual Double	GetTotalDuration () const =0
	Get the total duration of the stream, in seconds. More...

virtual UInt32	GetNumberOfMipLevels () const =0
	Get the number of mip levels. More...

virtual UInt32	GetNumberOfPlanes () const =0
	Get the number of color planes. More...

virtual IEnums::PixelFormat	GetPixelFormat () const =0
	Get the pixel format of the stream. More...

virtual UInt32	GetBytesPerPixel () const =0
	Get the number of bytes per pixel. More...

virtual UInt32	GetPixelSizeX (UInt32 mipLevel) const =0
	Get the number of horizontal pixels. More...

virtual UInt32	GetPixelSizeY (UInt32 mipLevel) const =0
	Get the number of vertical pixels. More...

virtual UInt32	GetBytesPerLine (UInt32 mipLevel) const =0
	Get the number of bytes per line. More...

virtual UInt32	GetNumberOfBytes (UInt32 mipLevel) const =0
	Get the number of bytes occupied by a single decoded mip level image. More...

virtual IEnums::PixelFormat	GetPixelFormat (UInt32 planeIndex) const =0
	Get the pixel format of a given plane. More...

virtual UInt32	GetBytesPerPixel (UInt32 planeIndex) const =0
	Get the number of bytes per pixel for a given plane. More...

virtual UInt32	GetPixelSizeX (UInt32 mipLevel, UInt32 planeIndex) const =0
	Get the number of horizontal pixels of a given color plane. More...

virtual UInt32	GetPixelSizeY (UInt32 mipLevel, UInt32 planeIndex) const =0
	Get the number of vertical pixels of a given color plane. More...

virtual UInt32	GetBytesPerLine (UInt32 mipLevel, UInt32 planeIndex) const =0
	Get the number of bytes per line of a given color plane. More...

virtual UInt32	GetNumberOfBytes (UInt32 mipLevel, UInt32 planeIndex) const =0
	Get the number of bytes occupied by a single decoded mip level plane. More...

virtual Bool	IsReadyForDecoding () const =0
	Check if the stream is ready to be decoded. More...

virtual Bool	StartDecoding ()=0
	Start decoding the stream. More...

virtual Bool	EndDecoding ()=0
	End decoding the stream. More...

virtual UInt32	Decode (UInt32 mipLevel, UInt32 planeIndex, Data &dstBuffer, IEnums::PixelFormat dstFormat, UInt32 firstFrame, UInt32 numFrames)=0
	Decode the stream. More...

virtual Bool	SetCurrentMode (IEnums::StreamMode mode)=0
	Set the stream's current access mode. More...

virtual const IEnums::StreamMode	GetCurrentMode () const =0
	Get the stream's current access mode. More...

virtual Bool	SetCurrentTimeOffset (Double timeOffset)=0
	Set the current time offset for subsequent PrepareDecodedData() calls. More...

virtual Double	GetCurrentTimeOffset () const =0
	Get the current time offset. More...

virtual Bool	PrepareDecodedData ()=0
	Prepare decoded data, creating the underlying pixel storage if needed. More...

virtual Bool	FinishDecodedData ()=0
	Finish decoded data after a call to PrepareDecodedData(). More...

virtual Bool	ReleaseDecodedData ()=0
	Release decoded data. More...

virtual Double	GetDecodedTimeOffset () const =0
	Get the time offset of the recently decoded data buffer. More...

virtual UInt64	GetDecodedFrameIndex () const =0
	Get the index of the recently decoded buffer's frame. More...

virtual const ConstData &	GetDecodedData (UInt32 mipLevel, UInt32 planeIndex)=0
	Get the decoded data. More...

virtual const IVideoSurface *	GetDecodedSurface (UInt32 mipLevel, UInt32 planeIndex)=0
	Get the decoded surface. More...

virtual const MutableData &	LockDecodedData (UInt32 mipLevel, UInt32 planeIndex)=0
	Lock the decoded data. More...

virtual IVideoSurface *	LockDecodedSurface (UInt32 mipLevel, UInt32 planeIndex)=0
	Lock the decoded surface. More...

virtual Bool	UnlockDecodedData (UInt32 mipLevel, UInt32 planeIndex)=0
	Unlock the decoded data. More...

virtual Bool	UnlockDecodedSurface (UInt32 mipLevel, UInt32 planeIndex)=0
	Unlock the decoded surface. More...

Detailed Description

The video stream interface.

Member Function Documentation

◆ Clone() [1/4]

virtual IVideoStream* Murl::IVideoStream::Clone ( ) const

pure virtual

Create a clone of the video stream object.

Returns: The new video stream object.

Implemented in Murl::Util::VideoStream.

◆ Clone() [2/4]

virtual IVideoStream* Murl::IVideoStream::Clone ( IEnums::PixelFormat pixelFormat ) const

pure virtual

Create a clone of the video with a specified pixel format.

Parameters

pixelFormat The pixel format of the new video object.

Returns: The new video stream object or null if conversion is not available.

Implemented in Murl::Util::VideoStream.

◆ Clone() [3/4]

virtual IVideoStream* Murl::IVideoStream::Clone	(	IEnums::PixelFormat	pixelFormat,
		UInt32	pixelSizeX,
		UInt32	pixelSizeY
	)		const

pure virtual

Create a clone of the video with a specified pixel format and size.

Parameters

pixelFormat	The pixel format of the new video object.
pixelSizeX	The number of horizontal pixels of the new video object.
pixelSizeY	The number of vertical pixels of the new video object.

Returns: The new video stream object or null if conversion is not available.

Implemented in Murl::Util::VideoStream.

◆ Clone() [4/4]

virtual IVideoStream* Murl::IVideoStream::Clone	(	IEnums::PixelFormat	pixelFormat,
		UInt32	pixelSizeX,
		UInt32	pixelSizeY,
		IEnums::MipMapGenerationMode	mipMapGen
	)		const

pure virtual

Create a clone with a specified pixel format and size and optional mip-mapping.

Parameters

pixelFormat	The pixel format of the new video object.
pixelSizeX	The number of horizontal pixels of the new video object.
pixelSizeY	The number of vertical pixels of the new video object.
mipMapGen	Specifies if and how mip maps are generated.

Returns: The new video stream object or null if conversion is not available.

Implemented in Murl::Util::VideoStream.

◆ GetNumberOfFrames()

virtual UInt32 Murl::IVideoStream::GetNumberOfFrames ( ) const

pure virtual

Get the total number of frames.

Returns: The number of frames.

Implemented in Murl::Util::VideoStream.

◆ GetFrameIndex()

virtual UInt32 Murl::IVideoStream::GetFrameIndex ( Double startTime ) const

pure virtual

Get the index of the frame at a given start time.

Parameters

startTime The frame start time in seconds.

Returns: The frame index.

Implemented in Murl::Util::VideoStream.

◆ GetStartTime()

virtual Double Murl::IVideoStream::GetStartTime ( UInt32 frameIndex ) const

pure virtual

Get the start time of a frame at a given index.

Parameters

frameIndex The index of the frame to query.

Returns: The frame's start time.

Implemented in Murl::Util::VideoStream.

◆ GetFrameRate()

virtual Double Murl::IVideoStream::GetFrameRate ( ) const

pure virtual

Get the number of frames per second.

Returns: The number of frames per second.

Implemented in Murl::Util::VideoStream.

◆ GetFrameDuration()

virtual Double Murl::IVideoStream::GetFrameDuration ( ) const

pure virtual

Get the duration of a single frame, i.e.

the inverse frame rate.

Returns: The frame duration in seconds.

Implemented in Murl::Util::VideoStream.

◆ GetTotalDuration()

virtual Double Murl::IVideoStream::GetTotalDuration ( ) const

pure virtual

Get the total duration of the stream, in seconds.

Returns: The total duration.

Implemented in Murl::Util::VideoStream.

◆ GetNumberOfMipLevels()

virtual UInt32 Murl::IVideoStream::GetNumberOfMipLevels ( ) const

pure virtual

Get the number of mip levels.

Returns: The number of mip levels.

Implemented in Murl::Util::VideoStream.

◆ GetNumberOfPlanes()

virtual UInt32 Murl::IVideoStream::GetNumberOfPlanes ( ) const

pure virtual

Get the number of color planes.

Regular pixel formats (e.g. IEnums::PIXEL_FORMAT_R8_G8_B8_A8) only have one plane. Planar YUV formats store 3 individual planes, one for each of the Y, U and V components, in the order given by the pixel format itself (e.g. IEnums::PIXEL_FORMAT_Y8_U8_V8). Semi-planar YUV formats have 2 planes, with index 0 representing the Y plane, and index 1 storing the U and V components per pixel.

Returns: The number of color planes.

Implemented in Murl::Util::VideoStream.

◆ GetPixelFormat() [1/2]

virtual IEnums::PixelFormat Murl::IVideoStream::GetPixelFormat ( ) const

pure virtual

Get the pixel format of the stream.

For regular (single plane) formats, this method usually returns the same pixel format as the surfaces returned by GetDecodedSurface() or LockDecodedSurface(). For multi-plane formats (such as IEnums::PIXEL_FORMAT_Y8_U8_V8) it returns the respective format, whereas the individual plane surfaces return their internal format, such as IEnums::PIXEL_FORMAT_L8 for a Y plane or IEnums::PIXEL_FORMAT_L8_A8 for a combined UV plane.

Returns: The pixel format of the stream.

Implemented in Murl::Util::VideoStream.

◆ GetBytesPerPixel() [1/2]

virtual UInt32 Murl::IVideoStream::GetBytesPerPixel ( ) const

pure virtual

Get the number of bytes per pixel.

This method is a convenience to get the number of bytes per pixel for the stream's pixel format, it only returns a concrete value for single-plane pixel formats. Querying the number of bytes per pixel for multi-plane formats must be done by calling the overloaded method GetBytesPerPixel(UInt32 planeIndex).

Returns: The number of bytes per pixel for the stream format.

Implemented in Murl::Util::VideoStream.

◆ GetPixelSizeX() [1/2]

virtual UInt32 Murl::IVideoStream::GetPixelSizeX ( UInt32 mipLevel ) const

pure virtual

Get the number of horizontal pixels.

Parameters

mipLevel The mip level in the range [0 .. GetNumberOfMipLevels() - 1].

Returns: The number of horizontal pixels.

Implemented in Murl::Util::VideoStream.

◆ GetPixelSizeY() [1/2]

virtual UInt32 Murl::IVideoStream::GetPixelSizeY ( UInt32 mipLevel ) const

pure virtual

Get the number of vertical pixels.

Parameters

mipLevel The mip level in the range [0 .. GetNumberOfMipLevels() - 1].

Returns: The number of vertical pixels.

Implemented in Murl::Util::VideoStream.

◆ GetBytesPerLine() [1/2]

virtual UInt32 Murl::IVideoStream::GetBytesPerLine ( UInt32 mipLevel ) const

pure virtual

Get the number of bytes per line.

Parameters

mipLevel The mip level in the range [0 .. GetNumberOfMipLevels() - 1].

Returns: The number of bytes per line.

Implemented in Murl::Util::VideoStream.

◆ GetNumberOfBytes() [1/2]

virtual UInt32 Murl::IVideoStream::GetNumberOfBytes ( UInt32 mipLevel ) const

pure virtual

Get the number of bytes occupied by a single decoded mip level image.

Parameters

mipLevel The mip level in the range [0 .. GetNumberOfMipLevels() - 1].

Returns: The number of bytes.

Implemented in Murl::Util::VideoStream.

◆ GetPixelFormat() [2/2]

virtual IEnums::PixelFormat Murl::IVideoStream::GetPixelFormat ( UInt32 planeIndex ) const

pure virtual

Get the pixel format of a given plane.

Parameters

planeIndex The color plane index in the range [0 .. GetNumberOfPlanes() - 1].

Returns: The pixel format of the plane.

Implemented in Murl::Util::VideoStream.

◆ GetBytesPerPixel() [2/2]

virtual UInt32 Murl::IVideoStream::GetBytesPerPixel ( UInt32 planeIndex ) const

pure virtual

Get the number of bytes per pixel for a given plane.

This method is a convenience to get the number of bytes per pixel for a color plane given by its index.

Parameters

planeIndex The color plane index in the range [0 .. GetNumberOfPlanes() - 1].

Returns: The number of bytes per pixel for the given plane.

Implemented in Murl::Util::VideoStream.

◆ GetPixelSizeX() [2/2]

virtual UInt32 Murl::IVideoStream::GetPixelSizeX	(	UInt32	mipLevel,
		UInt32	planeIndex
	)		const

pure virtual

Get the number of horizontal pixels of a given color plane.

Parameters

mipLevel	The mip level in the range [0 .. GetNumberOfMipLevels() - 1].
planeIndex	The color plane index in the range [0 .. GetNumberOfPlanes() - 1].

Returns: The number of horizontal pixels.

Implemented in Murl::Util::VideoStream.

◆ GetPixelSizeY() [2/2]

virtual UInt32 Murl::IVideoStream::GetPixelSizeY	(	UInt32	mipLevel,
		UInt32	planeIndex
	)		const

pure virtual

Get the number of vertical pixels of a given color plane.

Parameters

mipLevel	The mip level in the range [0 .. GetNumberOfMipLevels() - 1].
planeIndex	The color plane index in the range [0 .. GetNumberOfPlanes() - 1].

Returns: The number of vertical pixels.

Implemented in Murl::Util::VideoStream.

◆ GetBytesPerLine() [2/2]

virtual UInt32 Murl::IVideoStream::GetBytesPerLine	(	UInt32	mipLevel,
		UInt32	planeIndex
	)		const

pure virtual

Get the number of bytes per line of a given color plane.

Parameters

mipLevel	The mip level in the range [0 .. GetNumberOfMipLevels() - 1].
planeIndex	The color plane index in the range [0 .. GetNumberOfPlanes() - 1].

Returns: The number of bytes per line.

Implemented in Murl::Util::VideoStream.

◆ GetNumberOfBytes() [2/2]

virtual UInt32 Murl::IVideoStream::GetNumberOfBytes	(	UInt32	mipLevel,
		UInt32	planeIndex
	)		const

pure virtual

Get the number of bytes occupied by a single decoded mip level plane.

Parameters

mipLevel	The mip level in the range [0 .. GetNumberOfMipLevels() - 1].
planeIndex	The color plane index in the range [0 .. GetNumberOfPlanes() - 1].

Returns: The number of bytes.

Implemented in Murl::Util::VideoStream.

◆ IsReadyForDecoding()

virtual Bool Murl::IVideoStream::IsReadyForDecoding ( ) const

pure virtual

Check if the stream is ready to be decoded.

Returns: true if ready.

Implemented in Murl::Util::VideoStream.

◆ StartDecoding()

virtual Bool Murl::IVideoStream::StartDecoding ( )

pure virtual

Start decoding the stream.

Has to be called before Decode().

Returns: true if successful.

Implemented in Murl::Util::VideoStream.

◆ EndDecoding()

virtual Bool Murl::IVideoStream::EndDecoding ( )

pure virtual

End decoding the stream.

Has to be called after Decode().

Returns: true if successful.

Implemented in Murl::Util::VideoStream.

◆ Decode()

virtual UInt32 Murl::IVideoStream::Decode	(	UInt32	mipLevel,
		UInt32	planeIndex,
		Data &	dstBuffer,
		IEnums::PixelFormat	dstFormat,
		UInt32	firstFrame,
		UInt32	numFrames
	)

pure virtual

Decode the stream.

StartDecoding() has to be called before, see also EndDecoding().

Parameters

mipLevel	The mip level in the range [0 .. GetNumberOfMipLevels() - 1].
planeIndex	The color plane index in the range [0 .. GetNumberOfPlanes() - 1].
dstBuffer	The destination data.
dstFormat	The destination pixel format.
firstFrame	The first frame to decode.
numFrames	The number of frames to decode.

Returns: The number of decoded frames.

Implemented in Murl::Util::VideoStream.

◆ SetCurrentMode()

virtual Bool Murl::IVideoStream::SetCurrentMode ( IEnums::StreamMode mode )

pure virtual

Set the stream's current access mode.

This serves as a hint to a possible underlying stream decoder, to be able to do optimal decoding whether single frame access or a continuous sequence of frames is desired. This method returns true whenever the given time offset triggers the decoding of a new frame.

Parameters

mode	The access mode to apply.

Returns: true if a new frame was triggered.

Implemented in Murl::Util::VideoStream.

◆ GetCurrentMode()

virtual const IEnums::StreamMode Murl::IVideoStream::GetCurrentMode ( ) const

pure virtual

Get the stream's current access mode.

Returns: The current access mode.

Implemented in Murl::Util::VideoStream.

◆ SetCurrentTimeOffset()

virtual Bool Murl::IVideoStream::SetCurrentTimeOffset ( Double timeOffset )

pure virtual

Set the current time offset for subsequent PrepareDecodedData() calls.

This method returns true whenever the given time offset triggers the decoding of a new frame.

Parameters

timeOffset The time offset in seconds.

Returns: true if a new frame was triggered.

Implemented in Murl::Util::VideoStream.

◆ GetCurrentTimeOffset()

virtual Double Murl::IVideoStream::GetCurrentTimeOffset ( ) const

pure virtual

Get the current time offset.

Returns: The time offset in seconds.

Implemented in Murl::Util::VideoStream.

◆ PrepareDecodedData()

virtual Bool Murl::IVideoStream::PrepareDecodedData ( )

pure virtual

Prepare decoded data, creating the underlying pixel storage if needed.

Decode a single frame at the current position, see GetDecodedData().

Returns: true if successful.

Implemented in Murl::Util::VideoStream.

◆ FinishDecodedData()

virtual Bool Murl::IVideoStream::FinishDecodedData ( )

pure virtual

Finish decoded data after a call to PrepareDecodedData().

Returns: true if successful.

Implemented in Murl::Util::VideoStream.

◆ ReleaseDecodedData()

virtual Bool Murl::IVideoStream::ReleaseDecodedData ( )

pure virtual

Release decoded data.

If the stream supports re-creating its contents on its own, it may free any underlying pixel storage to save memory on this call, otherwise this may be a no-op.

Returns: true if successful.

Implemented in Murl::Util::VideoStream, and Murl::Util::EvictableVideoStream.

◆ GetDecodedTimeOffset()

virtual Double Murl::IVideoStream::GetDecodedTimeOffset ( ) const

pure virtual

Get the time offset of the recently decoded data buffer.

Returns: The time offset in seconds.

Implemented in Murl::Util::VideoStream.

◆ GetDecodedFrameIndex()

virtual UInt64 Murl::IVideoStream::GetDecodedFrameIndex ( ) const

pure virtual

Get the index of the recently decoded buffer's frame.

Returns: The frame index.

Implemented in Murl::Util::VideoStream.

◆ GetDecodedData()

virtual const ConstData& Murl::IVideoStream::GetDecodedData	(	UInt32	mipLevel,
		UInt32	planeIndex
	)

pure virtual

Get the decoded data.

PrepareDecodedData() has to be called before, see also FinishDecodedData().

Parameters

mipLevel	The mip level in the range [0 .. GetNumberOfMipLevels() - 1].
planeIndex	The color plane index in the range [0 .. GetNumberOfPlanes() - 1].

Returns: The decoded data or empty data if not supported.

Implemented in Murl::Util::VideoStream.

◆ GetDecodedSurface()

virtual const IVideoSurface* Murl::IVideoStream::GetDecodedSurface	(	UInt32	mipLevel,
		UInt32	planeIndex
	)

pure virtual

Get the decoded surface.

PrepareDecodedData() has to be called before, see also FinishDecodedData().

Parameters

mipLevel	The mip level in the range [0 .. GetNumberOfMipLevels() - 1].
planeIndex	The color plane index in the range [0 .. GetNumberOfPlanes() - 1].

Returns: The decoded surface or null if not supported.

Implemented in Murl::Util::VideoStream.

◆ LockDecodedData()

virtual const MutableData& Murl::IVideoStream::LockDecodedData	(	UInt32	mipLevel,
		UInt32	planeIndex
	)

pure virtual

Lock the decoded data.

Parameters

mipLevel	The mip level in the range [0 .. GetNumberOfMipLevels() - 1].
planeIndex	The color plane index in the range [0 .. GetNumberOfPlanes() - 1].

Returns: The mutable data or empty data if not supported.

Implemented in Murl::Util::VideoStream.

◆ LockDecodedSurface()

virtual IVideoSurface* Murl::IVideoStream::LockDecodedSurface	(	UInt32	mipLevel,
		UInt32	planeIndex
	)

pure virtual

Lock the decoded surface.

Parameters

mipLevel	The mip level in the range [0 .. GetNumberOfMipLevels() - 1].
planeIndex	The color plane index in the range [0 .. GetNumberOfPlanes() - 1].

Returns: The mutable surface or null if not supported.

Implemented in Murl::Util::VideoStream.

◆ UnlockDecodedData()

virtual Bool Murl::IVideoStream::UnlockDecodedData	(	UInt32	mipLevel,
		UInt32	planeIndex
	)

pure virtual

Unlock the decoded data.

Parameters

mipLevel	The mip level in the range [0 .. GetNumberOfMipLevels() - 1].
planeIndex	The color plane index in the range [0 .. GetNumberOfPlanes() - 1].

Returns: true if successful.

Implemented in Murl::Util::VideoStream.

◆ UnlockDecodedSurface()

virtual Bool Murl::IVideoStream::UnlockDecodedSurface	(	UInt32	mipLevel,
		UInt32	planeIndex
	)

pure virtual

Unlock the decoded surface.

Parameters

mipLevel	The mip level in the range [0 .. GetNumberOfMipLevels() - 1].
planeIndex	The color plane index in the range [0 .. GetNumberOfPlanes() - 1].

Returns: true if successful.

Implemented in Murl::Util::VideoStream.

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

murl_i_video_stream.h

Public Member Functions

Detailed Description

Member Function Documentation

◆ Clone() [1/4]

◆ Clone() [2/4]

◆ Clone() [3/4]

◆ Clone() [4/4]

◆ GetNumberOfFrames()

◆ GetFrameIndex()

◆ GetStartTime()

◆ GetFrameRate()

◆ GetFrameDuration()

◆ GetTotalDuration()

◆ GetNumberOfMipLevels()

◆ GetNumberOfPlanes()

◆ GetPixelFormat() [1/2]

◆ GetBytesPerPixel() [1/2]

◆ GetPixelSizeX() [1/2]

◆ GetPixelSizeY() [1/2]

◆ GetBytesPerLine() [1/2]

◆ GetNumberOfBytes() [1/2]

◆ GetPixelFormat() [2/2]

◆ GetBytesPerPixel() [2/2]

◆ GetPixelSizeX() [2/2]

◆ GetPixelSizeY() [2/2]

◆ GetBytesPerLine() [2/2]

◆ GetNumberOfBytes() [2/2]

◆ IsReadyForDecoding()

◆ StartDecoding()

◆ EndDecoding()

◆ Decode()

◆ SetCurrentMode()

◆ GetCurrentMode()

◆ SetCurrentTimeOffset()

◆ GetCurrentTimeOffset()

◆ PrepareDecodedData()

◆ FinishDecodedData()

◆ ReleaseDecodedData()

◆ GetDecodedTimeOffset()

◆ GetDecodedFrameIndex()

◆ GetDecodedData()

◆ GetDecodedSurface()

◆ LockDecodedData()

◆ LockDecodedSurface()

◆ UnlockDecodedData()

◆ UnlockDecodedSurface()