Bt848.h

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/* Copyright (C) 2002 Dominic Letourneau (dominic.letourneau@usherbrooke.ca)

   This library is free software; you can redistribute it and/or
   modify it under the terms of the GNU Lesser General Public
   License as published by the Free Software Foundation; either
   version 2.1 of the License, or (at your option) any later version.
   
   This library is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   Lesser General Public License for more details.
   
   You should have received a copy of the GNU Lesser General Public
   License along with this library; if not, write to the Free Software
   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*/
#ifndef _BT848_H_
#define _BT848_H_

#include "BufferedNode.h"
#include "BaseException.h"
#include "Image.h"
#include <string>
#include <pthread.h>
#include <sys/signal.h>

namespace RobotFlow {

class Bt848 : public FD::BufferedNode {


  friend  void* grabber_driver_thread (void *bt848);

 public:

  void newframe(int sig);

  Bt848(std::string nodeName, FD::ParameterSet params);

  virtual ~Bt848();

  virtual void calculate(int output_id, int count, FD::Buffer &out);

  static const int MODE_16BITS;

  void lock_grab();

  void unlock_grab();

  static Bt848 *m_instance;

 private:

  void initialize(int mode,int width, int height);
  void single_grab();

  int m_brightness;
  int m_contrast;
  int m_size;
  int m_width;
  int m_height;
  int m_mode;
  int m_device_descriptor;
  int m_frame_count;
  bool m_ready;

  std::string m_device_name;
  unsigned char *m_grab_data;
  pthread_mutex_t m_mutex;
  pthread_t m_driver_thread;
  
  //sigaction structure 
  struct sigaction m_sigact;
  
  //old sigaction structure                             
  struct sigaction m_oldact;

  void *mmbuf;

  FD::ObjectRef m_image;

  int outputID;

  bool m_thread_running;
  bool m_continuous;

};

}//namespace RobotFlow
#endif

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