rosbag_traj_combiner.cc
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2 Copyright (c) 2018, Alexander W. Winkler. All rights reserved.
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28 ******************************************************************************/
29 
30 #include <iostream>
31 #include <string>
32 #include <vector>
33 
34 #include <ros/init.h>
35 #include <rosbag/bag.h>
36 #include <rosbag/view.h>
37 #include <std_msgs/Int32.h>
39 #include <boost/foreach.hpp>
40 
41 #include <xpp_msgs/topic_names.h>
42 #include <towr_ros/topic_names.h>
43 
50 int main(int argc, char *argv[])
51 {
52  ros::init(argc, argv, "rosbag_trajectory_combiner");
53 
54  std::string name = "/home/winklera/bags/optimal_traj";
55 
56  rosbag::Bag bag_r;
57  bag_r.open(name+".bag", rosbag::bagmode::Read);
58  ROS_INFO_STREAM("Reading from bag " + bag_r.getFileName());
59 
60 
61  // get number of iterations in bag file
62  int n_opt_iterations = 0;
64  BOOST_FOREACH(rosbag::MessageInstance const m, view1) {
65  std_msgs::Int32::ConstPtr i = m.instantiate<std_msgs::Int32>();
66  n_opt_iterations = i->data;
67  }
68 
69  // select which iterations (message topics) to be included in bag file
70  std::vector<std::string> topics;
71  ROS_INFO_STREAM("Detected " + std::to_string(n_opt_iterations) + " iterations");
72  int n_visualizations = 5; // total number of visualizations is fixed
73  int frequency = std::floor(n_opt_iterations/n_visualizations);
74 
75  for (int i=0; i<n_visualizations; ++i)
76  topics.push_back(towr_msgs::nlp_iterations_name + std::to_string(frequency*i));
77  topics.push_back(towr_msgs::nlp_iterations_name + std::to_string(n_opt_iterations-1)); // for sure add final trajectory
78  rosbag::View view(bag_r, rosbag::TopicQuery(topics));
79 
80 
81  // change the timestamp so iterations are played back subsequently
82  std::map<std::string, double> t_iter;
83  double duration = view.getEndTime().toSec(); // duration of the trajectory
84  for (int i=0; i<topics.size(); ++i)
85  t_iter[topics.at(i)] = i*duration;
86 
87  ROS_INFO_STREAM("Visualizing messages:");
88  for (auto m : t_iter)
89  std::cout << m.first << std::endl;
90 
91 
92  // write the message with modified timestamp into new bag file
93  rosbag::Bag bag_w;
94  bag_w.open(name + "_combined.bag", rosbag::bagmode::Write);
95 
96  BOOST_FOREACH(rosbag::MessageInstance const m, view)
97  {
98  double t_global = t_iter.at(m.getTopic()) + m.getTime().toSec();
99  bag_w.write(xpp_msgs::robot_state_desired, ::ros::Time(t_global), m);
100  }
101 
102  bag_r.close();
103  bag_w.close();
104  ROS_INFO_STREAM("Successfully created bag " + bag_w.getFileName());
105 
106  return 1;
107 }
void open(std::string const &filename, uint32_t mode=bagmode::Read)
static const std::string robot_state_desired("/xpp/state_des")
std::string getFileName() const
ROSCPP_DECL void init(int &argc, char **argv, const std::string &name, uint32_t options=0)
static const std::string nlp_iterations_count("/towr/nlp_iterations_count")
int main(int argc, char *argv[])
static const std::string nlp_iterations_name("/towr/nlp_iterations_name")
void close()
ros::Time const & getTime() const
boost::shared_ptr< T > instantiate() const
ros::Time getEndTime()
#define ROS_INFO_STREAM(args)
std::string const & getTopic() const
void write(std::string const &topic, ros::MessageEvent< T > const &event)


towr_ros
Author(s): Alexander W. Winkler
autogenerated on Sat Apr 13 2019 02:28:05