Stream Class Reference

The stream to send Images or other data. More...

#include <cvb/gevserver/stream.hpp>

Inherits enable_shared_from_this< Stream >.

Public Member Functions
	Stream (const ServerPtr &parent)
	Creates the stream from the given parent server. More...
ServerPtr	Parent ()
	Gets the parent server object.
bool	IsRunning () const
	Gets whether this stream is running. More...
std::int64_t	ResendBuffersCount () const
	Gets the number of resend buffers. More...
void	SetResendBuffersCount (const std::int64_t &numBuffers)
	Sets the number of resend buffers. More...
void	Send (const ImagePtr &image, std::function< void(const ImagePtr &)> imageReleased)
	Sends the given image to the remote client. More...
bool	TrySend (const ImagePtr &image, std::function< void(const ImagePtr &)> imageReleased)
	Tries to send the given image to the remote client. More...
void	Send (const Image &image)
	Sends the given image to the remote client. More...
bool	TrySend (const Image &image)
	Tries to sends the given image to the remote client. More...
void	Send (const ImageBufferDescription &bufferDescription, void *basePtr, const std::size_t &bufferSize, std::function< void(void *)> bufferReleased)
	Sends the image at the given basePtr . More...
bool	TrySend (const ImageBufferDescription &bufferDescription, void *basePtr, const std::size_t &bufferSize, std::function< void(void *)> bufferReleased)
	Tries to send the image at the given basePtr . More...

Detailed Description

The stream to send Images or other data.

Constructor & Destructor Documentation

Stream()

Stream ( const ServerPtr &  parent )

inline

Creates the stream from the given parent server.

Parameters

parent

Parent server object.

Member Function Documentation

IsRunning()

bool IsRunning ( ) const

inline

Gets whether this stream is running.

Streaming can only be enabled by the remote client. Send is only possible as long as the stream is active (running).

Note that acquisition start/stop is an asynchronous action without any means to synchronize. Use the TrySend methods to avoid exceptions.

true if Parent's GevServer::State is State::AcquisitionEnabled; false otherwise.

ResendBuffersCount()

std::int64_t ResendBuffersCount ( ) const

inline

Gets the number of resend buffers.

This number specifies for how many full frames a packet resend can be done; set to 0 if no packet resend is to be supported.

Send() [1/3]

void Send ( const Image &  image )

inline

Sends the given image to the remote client.

The given image must fit into the payload size set at creation/State::Configuration state.

Packet resend must be disabled (ResendBuffersCount is zero).

Parameters

image

Image to be sent.

The image will be copied to the resend buffer.

Send() [2/3]

void Send ( const ImageBufferDescription &  bufferDescription, void *  basePtr, const std::size_t &  bufferSize, std::function< void(void *)>  bufferReleased  )

inline

Sends the image at the given basePtr .

The given image buffer must fit into the payload size set at creation/GevServerState::Configuration state.

If packet resend is enabled (ResendBuffersCount larger than zero), then the given image buffer must remain unchanged until bufferReleased has been called! In case packet resend is disabled bufferReleased will be called immediately.

Parameters

bufferDescription	Description of the image at basePtr .
basePtr	Address of the image buffer to send.
bufferSize	Length in bytes of the buffer at basePtr .
bufferReleased	Mandatory delegate to be called when the given image buffer is not needed anymore for packet resend.

Send() [3/3]

void Send ( const ImagePtr &  image, std::function< void(const ImagePtr &)>  imageReleased  )

inline

Sends the given image to the remote client.

The given image must fit into the payload size set at creation/GevServerState.Configuration state.

If packet resend is enabled (ResendBuffersCount larger than zero), then the given image must remain unchanged until imageReleased has been called! In case packet resend is disabled imageReleased will be called immediately.

Parameters

image	Image to be sent.
imageReleased	Delegate to be called when the given image is not needed anymore for packet resend. If null the image will be copied to the resend buffer.

SetResendBuffersCount()

void SetResendBuffersCount ( const std::int64_t &  numBuffers )

inline

Sets the number of resend buffers.

This number specifies for how many full frames a packet resend can be done; set to 0 if no packet resend is to be supported.

This property can only be change if the parent is in State::Configuration GevServer::State.

TrySend() [1/3]

bool TrySend ( const Image &  image )

inline

Tries to sends the given image to the remote client.

The given image must fit into the payload size set at creation/State::Configuration state.

Packet resend must be disabled (ResendBuffersCount is zero).

Parameters

image

Image to be sent.

The image will be copied to the resend buffer.

Returns

true if successfully sent; false on any error. Parameter errors and disposed exception will still be thrown.

TrySend() [2/3]

bool TrySend ( const ImageBufferDescription &  bufferDescription, void *  basePtr, const std::size_t &  bufferSize, std::function< void(void *)>  bufferReleased  )

inline

Tries to send the image at the given basePtr .

Parameters

bufferDescription	Description of the image at basePtr .
basePtr	Address of the image buffer to send.
bufferSize	Length in bytes of the buffer at basePtr .
bufferReleased	Delegate to be called when the given image buffer is not needed anymore for packet resend.

Returns

true if successfully sent; false on any error. Parameter errors and disposed exception will still be thrown.

TrySend() [3/3]

bool TrySend ( const ImagePtr &  image, std::function< void(const ImagePtr &)>  imageReleased  )

inline

Tries to send the given image to the remote client.

The given image must fit into the payload size set at creation/GevServerState::Configuration state.

If packet resend is enabled (ResendBuffersCount larger than zero), then the given image must remain unchanged until imageReleased has been called! In case packet resend is disabled imageReleased will be called immediately.

Parameters

image	Image to be sent.
imageReleased	Delegate to be called when the given image is not needed anymore for packet resend. If null the image will be copied to the resend buffer.

Returns

true if successfully sent; false on any error. Parameter errors and disposed exception will still be thrown.