openni_grabber_example.cpp

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/*
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 * Author: Suat Gedikli (gedikli@willowgarage.com)
 */

#include <pcl/point_cloud.h>
#include <pcl/point_types.h>
#include <pcl/io/pcd_io.h>
#include <pcl/io/openni_grabber.h>
#include <pcl/common/time.h>

class SimpleOpenNIProcessor
{
  public:

    bool save;

    void 
    cloud_cb_ (const pcl::PointCloud<pcl::PointXYZRGBA>::ConstPtr &cloud)
    {
      static unsigned count = 0;
      static double last = pcl::getTime ();
      if (++count == 30)
      {
        double now = pcl::getTime ();
        std::cout << "distance of center pixel :" << cloud->points [(cloud->width >> 1) * (cloud->height + 1)].z << " mm. Average framerate: " << double(count)/double(now - last) << " Hz" <<  std::endl;
        count = 0;
        last = now;
      }

      if (save)
      {
        std::stringstream ss;
        ss << std::setprecision(12) << pcl::getTime () * 100 << ".pcd";
        pcl::io::savePCDFile (ss.str (), *cloud);
        std::cout << "wrote point clouds to file " << ss.str() << std::endl;
      }
    }

    void 
    imageDepthImageCallback (const boost::shared_ptr<openni_wrapper::Image>&, const boost::shared_ptr<openni_wrapper::DepthImage>& d_img, float constant)
    {
      static unsigned count = 0;
      static double last = pcl::getTime ();
      if (++count == 30)
      {
        double now = pcl::getTime ();
        std::cout << "got synchronized image x depth-image with constant factor: " << constant << ". Average framerate: " << double(count)/double(now - last) << " Hz" <<  std::endl;
        std::cout << "Depth baseline: " << d_img->getBaseline () << " and focal length: " << d_img->getFocalLength () << std::endl;
        count = 0;
        last = now;
      }
    }

    void run ()
    {
      save = false;

      // create a new grabber for OpenNI devices
      pcl::Grabber* interface = new pcl::OpenNIGrabber();

      // make callback function from member function
      boost::function<void (const pcl::PointCloud<pcl::PointXYZRGBA>::ConstPtr&)> f =
        boost::bind (&SimpleOpenNIProcessor::cloud_cb_, this, _1);

      // connect callback function for desired signal. In this case its a point cloud with color values
      boost::signals2::connection c = interface->registerCallback (f);

      // make callback function from member function
      boost::function<void (const boost::shared_ptr<openni_wrapper::Image>&, const boost::shared_ptr<openni_wrapper::DepthImage>&, float constant)> f2 =
        boost::bind (&SimpleOpenNIProcessor::imageDepthImageCallback, this, _1, _2, _3);

      // connect callback function for desired signal. In this case its a point cloud with color values
      boost::signals2::connection c2 = interface->registerCallback (f2);

      // start receiving point clouds
      interface->start ();

      std::cout << "<Esc>, \'q\', \'Q\': quit the program" << std::endl;
      std::cout << "\' \': pause" << std::endl;
      std::cout << "\'s\': save" << std::endl;
      char key;
      do
      {
        key = static_cast<char> (getchar ());
        switch (key)
        {
          case ' ':
            if (interface->isRunning())
              interface->stop();
            else
              interface->start();
          case 's':
            save = !save;
        }
      } while (key != 27 && key != 'q' && key != 'Q');

      // stop the grabber
      interface->stop ();
    }
};

int
main ()
{
  SimpleOpenNIProcessor v;
  v.run ();
  return 0;
}