GrayLib::cVideoFSComp Class Reference

#include <cVideoFS.h>

Inheritance diagram for GrayLib::cVideoFSComp:

Public Member Functions
	cVideoFSComp (int nBlockX=k_BLOCK_DEF, int nBlockY=k_BLOCK_DEF)
	cVideoFSComp (const cVideoFSComp &copythis)
virtual	~cVideoFSComp ()
virtual HRESULT	CompStart (const cSurfaceInfo &rInfo, cSurfaceBitmapInfo *pbiOut) override
virtual HRESULT	CompFrame (const cSurfaceBase &frame, OUT const void *&rpCompRet, OUT size_t &rnSizeRet, OUT bool &rbIsKey) override
Public Member Functions inherited from GrayLib::IVideoCompress
virtual	~IVideoCompress ()
virtual void	CompEnd ()
virtual AV_QUALITY_t	get_CompQuality () const

Protected Member Functions
void	SetBlockDirty (int x, int y)
void	UpdateBlockDirtyBits (const cSurfaceBase &frame)
size_t	AddImageBlock (BYTE *pComp, INT_PTR nCompSizeMax, int row, int col)
Protected Member Functions inherited from GrayLib::cVideoFS
	cVideoFS (int nBlockX=k_BLOCK_DEF, int nBlockY=k_BLOCK_DEF)
	~cVideoFS ()
void	UpdateBlockParams ()
BYTE *	BuildCompFrameHeader (BYTE *pComp) const
bool	isReady () const noexcept
int	get_BlocksTotal () const noexcept
void	GetBlockRect (int col, int row, cRectI &rect) const noexcept
	UNITTEST_FRIEND (cVideoFS)

Protected Attributes
cNewPtr< cColor888 >	m_FrameLast
	The last full frame m_FrameSize. (diff against this) More...
cBitArrayStatic	m_BlocksDirty
	are any of the pixels in the block changed? 2d array of m_Blocks More...
cHeapBlock	m_CompFrame
	holder for the last compressed frame. key or diff. persisted for CompFrame( rpCompRet ) More...

Additional Inherited Members
Public Attributes inherited from GrayLib::cVideoFS
cWinSize	m_BlockSize
	Preconfigured size of the dirty block in pixels. (arbitrary 16..256, multiple of 16) More...
cWinSize	m_FrameSize
	total size in pixels in Frame. More...
cWinSize	m_Blocks
	Count of blocks = m_FrameSize / m_BlockSize. More...
UINT	m_nFrameNum
	frame number in video stream so far. More...
cArrayVal< cColor888 >	m_BlockTmp
	space to hold a block for (de)compression. m_BlockSize More...
Static Public Attributes inherited from GrayLib::cVideoFS
static const int	k_BLOCK_DEF = 32
static const FOURCC	k_Form = ((DWORD)(BYTE)( 'F' ) | ((DWORD)(BYTE)( 'S' ) << 8) | ((DWORD)(BYTE)( 'V' ) << 16) | ((DWORD)(BYTE)( '1' ) << 24 ))

Detailed Description

the Adobe Flash 'screenshare' compressor. FOURCC(fsv1)

Constructor & Destructor Documentation

cVideoFSComp() [1/2]

GrayLib::cVideoFSComp::cVideoFSComp	(	int	nBlockX = k_BLOCK_DEF,
		int	nBlockY = k_BLOCK_DEF
	)

cVideoFSComp() [2/2]

GrayLib::cVideoFSComp::cVideoFSComp

(

const cVideoFSComp &

copythis

)

~cVideoFSComp()

GrayLib::cVideoFSComp::~cVideoFSComp ( )

virtual

Member Function Documentation

AddImageBlock()

size_t GrayLib::cVideoFSComp::AddImageBlock ( BYTE *  pComp, INT_PTR  nCompSizeMax, int  row, int  col  )

protected

Take the image block from m_FrameLast and compress to pComp in m_CompFrame nCompSizeMax = sanity check on my buffer size.

Returns

compressed size of block.

CompFrame()

HRESULT GrayLib::cVideoFSComp::CompFrame ( const cSurfaceBase &  frame, OUT const void *&  rpCompRet, OUT size_t &  rnSizeRet, OUT bool &  rbIsKey  )

overridevirtual

IVideoCompress compress a single frame into the stream.

Returns

count of dirty blocks. <0 = HRESULT

Implements GrayLib::IVideoCompress.

CompStart()

HRESULT GrayLib::cVideoFSComp::CompStart ( const cSurfaceInfo &  rInfo, cSurfaceBitmapInfo *  pbiOut  )

overridevirtual

IVideoCompress Must call this again if the image size changes or the block size changes.

Returns

pbiOut = the compressed format info.

size of the frame.

Implements GrayLib::IVideoCompress.

SetBlockDirty()

void GrayLib::cVideoFSComp::SetBlockDirty ( int  x, int  y  )

protected

Mark this block is changed. x,y = pixels.

UpdateBlockDirtyBits()

void GrayLib::cVideoFSComp::UpdateBlockDirtyBits ( const cSurfaceBase &  frame )

protected

Discover which pixels/blocks have changed and copy them into the m_FrameLast

Member Data Documentation

m_BlocksDirty

cBitArrayStatic GrayLib::cVideoFSComp::m_BlocksDirty

protected

are any of the pixels in the block changed? 2d array of m_Blocks

m_CompFrame

cHeapBlock GrayLib::cVideoFSComp::m_CompFrame

protected

holder for the last compressed frame. key or diff. persisted for CompFrame( rpCompRet )

m_FrameLast

cNewPtr<cColor888> GrayLib::cVideoFSComp::m_FrameLast

protected

The last full frame m_FrameSize. (diff against this)

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

• c:/Dennis/Source/Gray/GrayLib/include/AV/cVideoFS.h
• c:/Dennis/Source/Gray/GrayLib/src/AV/cVideoFS.cpp