camera_subscriber.h

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#ifndef IMAGE_TRANSPORT_CAMERA_SUBSCRIBER_H
#define IMAGE_TRANSPORT_CAMERA_SUBSCRIBER_H

#include <ros/ros.h>
#include <sensor_msgs/CameraInfo.h>
#include <sensor_msgs/Image.h>
#include "image_transport/transport_hints.h"
#include "exports.h"

namespace image_transport {

class ImageTransport;

class IMAGE_TRANSPORT_DECL CameraSubscriber
{
public:
  typedef boost::function<void(const sensor_msgs::ImageConstPtr&,
                               const sensor_msgs::CameraInfoConstPtr&)> Callback;
  
  CameraSubscriber() {}

  std::string getTopic() const;

  std::string getInfoTopic() const;

  uint32_t getNumPublishers() const;

  std::string getTransport() const;

  void shutdown();

  operator void*() const;
  bool operator< (const CameraSubscriber& rhs) const { return impl_ <  rhs.impl_; }
  bool operator!=(const CameraSubscriber& rhs) const { return impl_ != rhs.impl_; }
  bool operator==(const CameraSubscriber& rhs) const { return impl_ == rhs.impl_; }
  
private:
  CameraSubscriber(ImageTransport& image_it, ros::NodeHandle& info_nh,
                   const std::string& base_topic, uint32_t queue_size,
                   const Callback& callback,
                   const ros::VoidPtr& tracked_object = ros::VoidPtr(),
                   const TransportHints& transport_hints = TransportHints());
  
  struct Impl;
  typedef boost::shared_ptr<Impl> ImplPtr;
  typedef boost::weak_ptr<Impl> ImplWPtr;
  
  ImplPtr impl_;

  friend class ImageTransport;
};

} //namespace image_transport

#endif