A base class for distributing incoming images to multiple client objects, supporting some simple image type conversions. More...

#include <gvimageinput.h>

Inheritance diagram for Gv::ImageInputSource:

Public Member Functions
	ImageInputSource (Gr::ImageConverter &, const std::string &source_name=std::string())
	Constructor.

virtual	~ImageInputSource ()
	Destructor.

size_t	handlers () const
	Returns the number of registered handlers.

void	addImageInputHandler (ImageInputHandler &)
	Adds a handler for image callbacks.

void	removeImageInputHandler (ImageInputHandler &)
	Removes a handler for image callbacks.

std::string	name () const
	Returns the source name, as passed to the constructor.

virtual void	resend (ImageInputHandler &)=0
	Asks the source to resend asynchronously the lastest available image, if any, to the specified handler, even if it is old or seen before. More...

Protected Member Functions
bool	sendImageInput (Gr::Image, ImageInputHandler *one_handler_p=nullptr)
	Sends a new image to all registered handlers, or optionally to just one of them. More...

void	sendNonImageInput (Gr::Image non_image, const std::string &type_str, ImageInputHandler *one_handler_p=nullptr)
	Sends non-image data to registered handlers (or one).

Detailed Description

A base class for distributing incoming images to multiple client objects, supporting some simple image type conversions.

Derived classes emit images by calling sendImageInput(). Client objects register an interest by calling addImageInputHandler(), and they implement imageInputConversion() to indicate the image format they require.

Definition at line 116 of file gvimageinput.h.

Member Function Documentation

virtual void Gv::ImageInputSource::resend ( ImageInputHandler & )

pure virtual

Asks the source to resend asynchronously the lastest available image, if any, to the specified handler, even if it is old or seen before.

Some overrides may always do nothing, and others may do nothing only if no data is available.

bool Gv::ImageInputSource::sendImageInput	(	Gr::Image	image_in,
		ImageInputHandler *	one_handler_p = `nullptr`
	)

protected

Sends a new image to all registered handlers, or optionally to just one of them.

Returns false if there were any image conversion errors.

Definition at line 100 of file gvimageinput.cpp.

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

/home/graeme/videotools/src/gvideo/gvimageinput.h
/home/graeme/videotools/src/gvideo/gvimageinput.cpp

Public Member Functions

Protected Member Functions

Detailed Description

Member Function Documentation