This class defines a NULL video output device.

Inheritance:

Public Methods

	PVideoOutputDeviceNULL () Create a new video output device
virtual BOOL	Open ( const PString & deviceName, BOOL startImmediate = TRUE ) Open the device given the device name.
virtual BOOL	IsOpen () Determine if the device is currently open
virtual PStringList	GetDeviceNames () const Get a list of all of the drivers available
virtual PINDEX	GetMaxFrameBytes () Get the maximum frame size in bytes.
virtual BOOL	SetFrameData ( unsigned x, unsigned y, unsigned width, unsigned height, const BYTE* data, BOOL endFrame = TRUE ) Set a section of the output frame buffer
virtual BOOL	EndFrame () Indicate frame may be displayed

Inherited from PVideoOutputDevice:

Public Methods

virtual BOOL CanCaptureVideo() const

Inherited from PVideoDevice:

Public Methods

virtual BOOL OpenFull( const OpenArgs & args, BOOL startImmediate = TRUE )

virtual BOOL Close()

virtual BOOL Start()

virtual BOOL Stop()

const PString& GetDeviceName() const

virtual BOOL SetVideoFormat( VideoFormat videoFormat )

virtual VideoFormat GetVideoFormat() const

virtual int GetNumChannels()

virtual BOOL SetChannel( int channelNumber )

virtual int GetChannel() const

virtual BOOL SetColourFormatConverter( const PString & colourFormat )

virtual BOOL SetColourFormat( const PString & colourFormat )

const PString& GetColourFormat() const

virtual BOOL SetFrameRate( unsigned rate )

virtual unsigned GetFrameRate() const

virtual BOOL GetFrameSizeLimits( unsigned & minWidth, unsigned & minHeight, unsigned & maxWidth, unsigned & maxHeight )

virtual BOOL SetFrameSizeConverter( unsigned width, unsigned height, BOOL bScaleNotCrop )

virtual BOOL SetFrameSize( unsigned width, unsigned height )

virtual BOOL GetFrameSize( unsigned & width, unsigned & height )

virtual unsigned GetFrameWidth() const

virtual unsigned GetFrameHeight() const

static unsigned CalculateFrameBytes( unsigned width, unsigned height, const PString & colourFormat )

int GetLastError() const

virtual int GetBrightness()

virtual BOOL SetBrightness(unsigned newBrightness)

virtual int GetWhiteness()

virtual BOOL SetWhiteness(unsigned newWhiteness)

virtual int GetColour()

virtual BOOL SetColour(unsigned newColour)

virtual int GetContrast()

virtual BOOL SetContrast(unsigned newContrast)

virtual int GetHue()

virtual BOOL SetHue(unsigned newHue)

virtual BOOL GetParameters( int* whiteness, int* brightness, int* colour, int* contrast, int* hue )

virtual BOOL SetVideoChannelFormat( int channelNumber, VideoFormat videoFormat )

virtual BOOL GetVFlipState()

virtual BOOL SetVFlipState( BOOL newVFlipState )

void SetPreferredColourFormat(const PString & colourFmt)

const PString& GetPreferredColourFormat()

Inherited from PObject:

Public Methods

Run Time Type functions

I/O functions

Miscellaneous functions

Public Members

Comparison functions

Documentation

This class defines a NULL video output device. This will do precisely nothing with the output.

PVideoOutputDeviceNULL()

Create a new video output device

virtual BOOL Open( const PString & deviceName, BOOL startImmediate = TRUE )

Open the device given the device name.

Parameters:

deviceName - Device name to open
startImmediate - Immediately start device

virtual BOOL IsOpen()

Determine if the device is currently open

virtual PStringList GetDeviceNames() const

Get a list of all of the drivers available

virtual PINDEX GetMaxFrameBytes()

Get the maximum frame size in bytes.

Note a particular device may be able to provide variable length frames (eg motion JPEG) so will be the maximum size of all frames.

virtual BOOL SetFrameData( unsigned x, unsigned y, unsigned width, unsigned height, const BYTE* data, BOOL endFrame = TRUE )

Set a section of the output frame buffer

virtual BOOL EndFrame()

Indicate frame may be displayed

This class has no child classes.

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