ros_image_texture.h

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/*
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#ifndef RVIZ_ROS_IMAGE_TEXTURE_H
#define RVIZ_ROS_IMAGE_TEXTURE_H

#include <sensor_msgs/Image.h>

#include <OGRE/OgreTexture.h>
#include <OGRE/OgreImage.h>

#include <boost/shared_ptr.hpp>
#include <boost/thread/mutex.hpp>

#include <ros/ros.h>

#include <stdexcept>

namespace rviz
{

class UnsupportedImageEncoding : public std::runtime_error
{
public:
  UnsupportedImageEncoding(const std::string& encoding)
  : std::runtime_error("Unsupported image encoding [" + encoding + "]")
  {}
};

class ROSImageTexture
{
public:
  ROSImageTexture();
  ~ROSImageTexture();

  void addMessage(const sensor_msgs::Image::ConstPtr& image);
  bool update();
  void clear();

  const Ogre::TexturePtr& getTexture() { return texture_; }
  const sensor_msgs::Image::ConstPtr& getImage();

  uint32_t getWidth() { return width_; }
  uint32_t getHeight() { return height_; }

  // automatic range normalization
  void setNormalizeFloatImage( bool normalize, double min=0.0, double max=1.0 );
  void setMedianFrames( unsigned median_frames );

private:

  double updateMedian( std::deque<double>& buffer, double new_value );

  template<typename T>
  void normalize( T* image_data, size_t image_data_size, std::vector<uint8_t> &buffer  );

  sensor_msgs::Image::ConstPtr current_image_;
  boost::mutex mutex_;
  bool new_image_;

  Ogre::TexturePtr texture_;
  Ogre::Image empty_image_;

  uint32_t width_;
  uint32_t height_;

  // fields for float image running median computation
  bool normalize_;
  double min_;
  double max_;
  unsigned median_frames_;
  std::deque<double> min_buffer_;
  std::deque<double> max_buffer_;
};

}

#endif