image_transport::Subscriber Class Reference

Manages a subscription callback on a specific topic that can be interpreted as an Image topic. More...

#include <subscriber.h>

Classes
struct	Impl

Public Member Functions
uint32_t	getNumPublishers () const
	Returns the number of publishers this subscriber is connected to. More...
std::string	getTopic () const
	Returns the base image topic. More...
std::string	getTransport () const
	Returns the name of the transport being used. More...
	operator void * () const
bool	operator!= (const Subscriber &rhs) const
bool	operator< (const Subscriber &rhs) const
bool	operator== (const Subscriber &rhs) const
void	shutdown ()
	Unsubscribe the callback associated with this Subscriber. More...
	Subscriber ()

Private Types
typedef boost::shared_ptr< Impl >	ImplPtr
typedef boost::weak_ptr< Impl >	ImplWPtr

Private Member Functions
	Subscriber (ros::NodeHandle &nh, const std::string &base_topic, uint32_t queue_size, const boost::function< void(const sensor_msgs::ImageConstPtr &)> &callback, const ros::VoidPtr &tracked_object, const TransportHints &transport_hints, const SubLoaderPtr &loader)

Private Attributes
ImplPtr	impl_

Friends
class	ImageTransport

Detailed Description

Manages a subscription callback on a specific topic that can be interpreted as an Image topic.

Subscriber is the client-side counterpart to Publisher. By loading the appropriate plugin, it can subscribe to a base image topic using any available transport. The complexity of what transport is actually used is hidden from the user, who sees only a normal Image callback.

A Subscriber should always be created through a call to ImageTransport::subscribe(), or copied from one that was. Once all copies of a specific Subscriber go out of scope, the subscription callback associated with that handle will stop being called. Once all Subscriber for a given topic go out of scope the topic will be unsubscribed.

Definition at line 62 of file subscriber.h.

Member Typedef Documentation

ImplPtr

typedef boost::shared_ptr<Impl> image_transport::Subscriber::ImplPtr

private

Definition at line 101 of file subscriber.h.

ImplWPtr

typedef boost::weak_ptr<Impl> image_transport::Subscriber::ImplWPtr

private

Definition at line 103 of file subscriber.h.

Constructor & Destructor Documentation

Subscriber() [1/2]

image_transport::Subscriber::Subscriber ( )

inline

Definition at line 65 of file subscriber.h.

Subscriber() [2/2]

image_transport::Subscriber::Subscriber ( ros::NodeHandle &  nh, const std::string &  base_topic, uint32_t  queue_size, const boost::function< void(const sensor_msgs::ImageConstPtr &)> &  callback, const ros::VoidPtr &  tracked_object, const TransportHints &  transport_hints, const SubLoaderPtr &  loader  )

private

Definition at line 75 of file subscriber.cpp.

Member Function Documentation

getNumPublishers()

uint32_t image_transport::Subscriber::getNumPublishers

(

)

const

Returns the number of publishers this subscriber is connected to.

Definition at line 120 of file subscriber.cpp.

getTopic()

std::string image_transport::Subscriber::getTopic

(

)

const

Returns the base image topic.

The Subscriber may actually be subscribed to some transport-specific topic that differs from the base topic.

Definition at line 114 of file subscriber.cpp.

getTransport()

std::string image_transport::Subscriber::getTransport

(

)

const

Returns the name of the transport being used.

Definition at line 126 of file subscriber.cpp.

operator void *()

image_transport::Subscriber::operator void *

(

)

const

Definition at line 137 of file subscriber.cpp.

operator!=()

bool image_transport::Subscriber::operator!= ( const Subscriber &  rhs ) const

inline

Definition at line 92 of file subscriber.h.

operator<()

bool image_transport::Subscriber::operator< ( const Subscriber &  rhs ) const

inline

Definition at line 91 of file subscriber.h.

operator==()

bool image_transport::Subscriber::operator== ( const Subscriber &  rhs ) const

inline

Definition at line 93 of file subscriber.h.

shutdown()

void image_transport::Subscriber::shutdown

(

)

Unsubscribe the callback associated with this Subscriber.

Definition at line 132 of file subscriber.cpp.

Friends And Related Function Documentation

ImageTransport

friend class ImageTransport

friend

Definition at line 107 of file subscriber.h.

Member Data Documentation

impl_

ImplPtr image_transport::Subscriber::impl_

private

Definition at line 105 of file subscriber.h.

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

• subscriber.h
• subscriber.cpp