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 * $Id: sac_segmentation.h 35564 2011-01-27 07:32:12Z rusu $
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#ifndef PCL_ROS_SAC_SEGMENTATION_H_
#define PCL_ROS_SAC_SEGMENTATION_H_

#include "pcl_ros/pcl_nodelet.h"
#include <message_filters/pass_through.h>

// PCL includes
#include <pcl/segmentation/sac_segmentation.h>

// Dynamic reconfigure
#include <dynamic_reconfigure/server.h>
#include "pcl_ros/SACSegmentationConfig.h"
#include "pcl_ros/SACSegmentationFromNormalsConfig.h"

namespace pcl_ros
{
  namespace sync_policies = message_filters::sync_policies;

  ////////////////////////////////////////////////////////////////////////////////////////////
  /** \brief @b SACSegmentation represents the Nodelet segmentation class for Sample Consensus methods and models, in
    * the sense that it just creates a Nodelet wrapper for generic-purpose SAC-based segmentation.
    * \author Radu Bogdan Rusu
    */
  class SACSegmentation : public PCLNodelet
  {
    typedef pcl::PointCloud<pcl::PointXYZ> PointCloud;
    typedef PointCloud::Ptr PointCloudPtr;
    typedef PointCloud::ConstPtr PointCloudConstPtr;

    public:
      /** \brief Constructor. */
      SACSegmentation () : min_inliers_(0) {}

      /** \brief Set the input TF frame the data should be transformed into before processing, if input.header.frame_id is different.
        * \param tf_frame the TF frame the input PointCloud should be transformed into before processing
        */
      inline void setInputTFframe (std::string tf_frame) { tf_input_frame_ = tf_frame; }
      
      /** \brief Get the TF frame the input PointCloud should be transformed into before processing. */
      inline std::string getInputTFframe () { return (tf_input_frame_); }

      /** \brief Set the output TF frame the data should be transformed into after processing.
        * \param tf_frame the TF frame the PointCloud should be transformed into after processing
        */
      inline void setOutputTFframe (std::string tf_frame) { tf_output_frame_ = tf_frame; }
      
      /** \brief Get the TF frame the PointCloud should be transformed into after processing. */
      inline std::string getOutputTFframe () { return (tf_output_frame_); }

    protected:
      // The minimum number of inliers a model must have in order to be considered valid.
      int min_inliers_;

      // ROS nodelet attributes
      /** \brief The output PointIndices publisher. */
      ros::Publisher pub_indices_;

      /** \brief The output ModelCoefficients publisher. */
      ros::Publisher pub_model_;

      /** \brief The input PointCloud subscriber. */
      ros::Subscriber sub_input_;

      /** \brief Pointer to a dynamic reconfigure service. */
      boost::shared_ptr<dynamic_reconfigure::Server<SACSegmentationConfig> > srv_;

      /** \brief The input TF frame the data should be transformed into, if input.header.frame_id is different. */
      std::string tf_input_frame_;
      
      /** \brief The original data input TF frame. */
      std::string tf_input_orig_frame_;
      
      /** \brief The output TF frame the data should be transformed into, if input.header.frame_id is different. */
      std::string tf_output_frame_;

      /** \brief Null passthrough filter, used for pushing empty elements in the
        * synchronizer */
      message_filters::PassThrough<pcl_msgs::PointIndices> nf_pi_;

      /** \brief Nodelet initialization routine. */
      virtual void onInit ();

      /** \brief Dynamic reconfigure callback
        * \param config the config object
        * \param level the dynamic reconfigure level
        */
      void config_callback (SACSegmentationConfig &config, uint32_t level);

      /** \brief Input point cloud callback. Used when \a use_indices is set.
        * \param cloud the pointer to the input point cloud
        * \param indices the pointer to the input point cloud indices
        */
      void input_indices_callback (const PointCloudConstPtr &cloud, const PointIndicesConstPtr &indices);

      /** \brief Pointer to a set of indices stored internally.
       * (used when \a latched_indices_ is set). 
       */
      PointIndices indices_;

      /** \brief Indices callback. Used when \a latched_indices_ is set.
        * \param indices the pointer to the input point cloud indices
        */
      inline void
      indices_callback (const PointIndicesConstPtr &indices)
      {
        indices_ = *indices;
      }

      /** \brief Input callback. Used when \a latched_indices_ is set.
        * \param input the pointer to the input point cloud
        */
      inline void
      input_callback (const PointCloudConstPtr &input)
      {
        indices_.header = fromPCL(input->header);
        PointIndicesConstPtr indices;
        indices.reset (new PointIndices (indices_));
        nf_pi_.add (indices);
      }

    private:
      /** \brief Internal mutex. */
      boost::mutex mutex_;

      /** \brief The PCL implementation used. */
      pcl::SACSegmentation<pcl::PointXYZ> impl_;

      /** \brief Synchronized input, and indices.*/
      boost::shared_ptr<message_filters::Synchronizer<sync_policies::ExactTime<PointCloud, PointIndices> > >       sync_input_indices_e_;
      boost::shared_ptr<message_filters::Synchronizer<sync_policies::ApproximateTime<PointCloud, PointIndices> > > sync_input_indices_a_;

    public:
      EIGEN_MAKE_ALIGNED_OPERATOR_NEW
  };

  ////////////////////////////////////////////////////////////////////////////////////////////
  /** \brief @b SACSegmentationFromNormals represents the PCL nodelet segmentation class for Sample Consensus methods and
    * models that require the use of surface normals for estimation.
    */
  class SACSegmentationFromNormals: public SACSegmentation
  {
    typedef pcl::PointCloud<pcl::PointXYZ> PointCloud;
    typedef PointCloud::Ptr PointCloudPtr;
    typedef PointCloud::ConstPtr PointCloudConstPtr;

    typedef pcl::PointCloud<pcl::Normal> PointCloudN;
    typedef PointCloudN::Ptr PointCloudNPtr;
    typedef PointCloudN::ConstPtr PointCloudNConstPtr;

    public:
      /** \brief Set the input TF frame the data should be transformed into before processing, if input.header.frame_id is different.
        * \param tf_frame the TF frame the input PointCloud should be transformed into before processing
        */
      inline void setInputTFframe (std::string tf_frame) { tf_input_frame_ = tf_frame; }
      
      /** \brief Get the TF frame the input PointCloud should be transformed into before processing. */
      inline std::string getInputTFframe () { return (tf_input_frame_); }

      /** \brief Set the output TF frame the data should be transformed into after processing.
        * \param tf_frame the TF frame the PointCloud should be transformed into after processing
        */
      inline void setOutputTFframe (std::string tf_frame) { tf_output_frame_ = tf_frame; }
      
      /** \brief Get the TF frame the PointCloud should be transformed into after processing. */
      inline std::string getOutputTFframe () { return (tf_output_frame_); }

    protected:
      // ROS nodelet attributes
      /** \brief The normals PointCloud subscriber filter. */
      message_filters::Subscriber<PointCloudN> sub_normals_filter_;

      /** \brief The input PointCloud subscriber. */
      ros::Subscriber sub_axis_;

      /** \brief Pointer to a dynamic reconfigure service. */
      boost::shared_ptr<dynamic_reconfigure::Server<SACSegmentationFromNormalsConfig> > srv_;
    
      /** \brief Input point cloud callback.
        * Because we want to use the same synchronizer object, we push back
        * empty elements with the same timestamp.
        */
      inline void
      input_callback (const PointCloudConstPtr &cloud)
      {
        PointIndices indices;
        indices.header.stamp = fromPCL(cloud->header).stamp;
        nf_.add (boost::make_shared<PointIndices> (indices));
      }

      /** \brief Null passthrough filter, used for pushing empty elements in the 
        * synchronizer */
      message_filters::PassThrough<PointIndices> nf_;

      /** \brief The input TF frame the data should be transformed into, if input.header.frame_id is different. */
      std::string tf_input_frame_;
      /** \brief The original data input TF frame. */
      std::string tf_input_orig_frame_;
      /** \brief The output TF frame the data should be transformed into, if input.header.frame_id is different. */
      std::string tf_output_frame_;

      /** \brief Nodelet initialization routine. */
      virtual void onInit ();

      /** \brief Model callback
        * \param model the sample consensus model found
        */
      void axis_callback (const pcl_msgs::ModelCoefficientsConstPtr &model);

      /** \brief Dynamic reconfigure callback
        * \param config the config object
        * \param level the dynamic reconfigure level
        */
      void config_callback (SACSegmentationFromNormalsConfig &config, uint32_t level);

      /** \brief Input point cloud callback.
        * \param cloud the pointer to the input point cloud
        * \param cloud_normals the pointer to the input point cloud normals
        * \param indices the pointer to the input point cloud indices
        */
      void input_normals_indices_callback (const PointCloudConstPtr &cloud, 
                                           const PointCloudNConstPtr &cloud_normals, 
                                           const PointIndicesConstPtr &indices);
   
    private:
      /** \brief Internal mutex. */
      boost::mutex mutex_;

      /** \brief The PCL implementation used. */
      pcl::SACSegmentationFromNormals<pcl::PointXYZ, pcl::Normal> impl_;

      /** \brief Synchronized input, normals, and indices.*/
      boost::shared_ptr<message_filters::Synchronizer<sync_policies::ApproximateTime<PointCloud, PointCloudN, PointIndices> > > sync_input_normals_indices_a_;
      boost::shared_ptr<message_filters::Synchronizer<sync_policies::ExactTime<PointCloud, PointCloudN, PointIndices> > > sync_input_normals_indices_e_;

    public:
      EIGEN_MAKE_ALIGNED_OPERATOR_NEW
  };
}

#endif  //#ifndef PCL_ROS_SAC_SEGMENTATION_H_