SingleStreamHandler Class Reference

Handler object for a single stream. More...

Inherits MultiStreamHandler.

Public Member Functions
None	SingleStreamHandler (self, cvb.Stream stream)
	Create a stream handler object.
None	handle_async_stream (self, cvb.Stream stream)
	Asynchronously called for the registered stream.
None	handle_async_wait_result (self, cvb.StreamImage image, int status)
	Asynchronously called for all acquired images.
None	setup (self, cvb.Stream stream)
	Setup the stream for acquisition.
None	tear_down (self, cvb.Stream stream)
	Tear down the stream after acquisition.
Public Member Functions inherited from MultiStreamHandler
None	MultiStreamHandler (self, List[cvb.Stream] stream_list)
	Create a stream handler object.
None	finish (self)
	Stop the handler.
bool	handle_error (self, Type[Exception] type, Exception value, Any traceback)
	Asynchronously called for all acquired images.
None	run (self)
	Start the handler.
bool	try_finish (self)
	Stop the handler.

Additional Inherited Members
Properties inherited from MultiStreamHandler
	is_active = property
	bool: Check if the acquisition thread is running.

Detailed Description

Handler object for a single stream.

This handler provides a convenient way to acquire images from a single stream within a dedicated thread.

For a multiple synchronous stream see cvb.MultiStreamHandler.

Example

QmlStreamDisplay

Constructor & Destructor Documentation

SingleStreamHandler()

None SingleStreamHandler	(		self,
		cvb.Stream	stream )

Create a stream handler object.

Parameters

stream : cvb.Stream Stream to handle.

Member Function Documentation

handle_async_stream()

None handle_async_stream	(		self,
		cvb.Stream	stream )

Asynchronously called for the registered stream.

The default implementation just waits for the next image.

This method is called from a dedicated thread!

Parameters

stream : cvb.Stream Stream to handle (provided at creation).

Reimplemented from MultiStreamHandler.

handle_async_wait_result()

None handle_async_wait_result	(		self,
		cvb.StreamImage	image,
		int	status )

Asynchronously called for all acquired images.

The default implementation does nothing.

This method is called from a dedicated thread!

Parameters

image : cvb.StreamImage The acquired image (might be None).

status : int Wait status for the acquired image (see cvb.WaitStatus).

Reimplemented from MultiStreamHandler.

setup()

None setup	(		self,
		cvb.Stream	stream )

Setup the stream for acquisition.

The default implementation just calls Stream.start().

Parameters

stream : cvb.Stream Stream to handle(provided at creation).

tear_down()

None tear_down	(		self,
		cvb.Stream	stream )

Tear down the stream after acquisition.

The default implementation just calls Stream.try_abort().

Parameters

stream : cvb.Stream Stream to handle (provided at creation).