depthcloud_encoder.h

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 *  Author: Julius Kammerl (jkammerl@willowgarage.com)
 *
 */

#ifndef DEPTHCLOUD_ENCODER_H
#define DEPTHCLOUD_ENCODER_H

#include <iostream>
#include <string>
#include <boost/thread.hpp>

#include <image_transport/image_transport.h>
#include <image_transport/subscriber_filter.h>

#include <sensor_msgs/image_encodings.h>

#include <message_filters/subscriber.h>
#include <message_filters/synchronizer.h>
#include <message_filters/sync_policies/approximate_time.h>

#include <tf/transform_listener.h>
#include <geometry_msgs/TransformStamped.h>

#include <sensor_msgs/PointCloud2.h>
#include <pcl/point_types.h>

#include "ros/ros.h"

namespace depthcloud
{

class DepthCloudEncoder
{
public:
  DepthCloudEncoder(ros::NodeHandle& nh, ros::NodeHandle& pnh);
  virtual ~DepthCloudEncoder();

protected:

  void connectCb();

  void subscribe(std::string& depth_topic, std::string& color_topic);
  void subscribeCloud(std::string& cloud_topic);
  void unsubscribe();

  void cloudCB(const sensor_msgs::PointCloud2& cloud_msg);

  void depthCB(const sensor_msgs::ImageConstPtr& depth_msg);

  void depthColorCB(const sensor_msgs::ImageConstPtr& depth_msg, const sensor_msgs::ImageConstPtr& color_msg);

  void depthInterpolation(sensor_msgs::ImageConstPtr depth_msg,
                          sensor_msgs::ImagePtr depth_int_msg,
                          sensor_msgs::ImagePtr mask_msg);

  void cloudToDepth(const sensor_msgs::PointCloud2& cloud_msg, sensor_msgs::ImagePtr depth_msg, sensor_msgs::ImagePtr color_msg);
  void process(const sensor_msgs::ImageConstPtr& depth_msg, const sensor_msgs::ImageConstPtr& color_msg, const std::size_t crop_size);


  typedef message_filters::sync_policies::ApproximateTime<sensor_msgs::Image, sensor_msgs::Image> SyncPolicyDepthColor;
  typedef message_filters::Synchronizer<SyncPolicyDepthColor> SynchronizerDepthColor;

  ros::NodeHandle& nh_;
  ros::NodeHandle& pnh_;

  // ROS stuff
  boost::shared_ptr<image_transport::SubscriberFilter > depth_sub_;
  boost::shared_ptr<image_transport::SubscriberFilter > color_sub_;
  ros::Subscriber cloud_sub_;

  boost::shared_ptr<SynchronizerDepthColor> sync_depth_color_;

  boost::mutex connect_mutex_;

  image_transport::ImageTransport pub_it_;
  image_transport::Publisher pub_;

  std::size_t crop_size_;

  std::string depthmap_topic_;
  std::string rgb_image_topic_;
  std::string cloud_topic_;
  std::string camera_frame_id_;
  std::string depth_source_;

  tf::TransformListener tf_listener_;

  double f_;

  bool connectivityExceptionFlag, lookupExceptionFlag;
};

}

#endif