single_subscriber_publisher.h

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#ifndef IMAGE_TRANSPORT_SINGLE_SUBSCRIBER_PUBLISHER
#define IMAGE_TRANSPORT_SINGLE_SUBSCRIBER_PUBLISHER
 
#include <boost/noncopyable.hpp>
#include <boost/function.hpp>
#include <sensor_msgs/Image.h>
#include "exports.h"
 
namespace image_transport {
 
class IMAGE_TRANSPORT_DECL SingleSubscriberPublisher : boost::noncopyable
{
public:
  typedef boost::function<uint32_t()> GetNumSubscribersFn;
  typedef boost::function<void(const sensor_msgs::Image&)> PublishFn;
  
  SingleSubscriberPublisher(const std::string& caller_id, const std::string& topic,
                            const GetNumSubscribersFn& num_subscribers_fn,
                            const PublishFn& publish_fn);
  
  std::string getSubscriberName() const;
 
  std::string getTopic() const;
 
  uint32_t getNumSubscribers() const;
 
  void publish(const sensor_msgs::Image& message) const;
  void publish(const sensor_msgs::ImageConstPtr& message) const;
 
private:
  std::string caller_id_;
  std::string topic_;
  GetNumSubscribersFn num_subscribers_fn_;
  PublishFn publish_fn_;
 
  friend class Publisher; // to get publish_fn_ directly
};
 
typedef boost::function<void(const SingleSubscriberPublisher&)> SubscriberStatusCallback;
 
} //namespace image_transport
 
#endif