/home/rex/ebltrunk/tools/libeblearntools/include/camera_shmem.h

/***************************************************************************
 *   Copyright (C) 2010 by Pierre Sermanet   *
 *   pierre.sermanet@gmail.com   *
 *   All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Redistribution under a license not approved by the Open Source 
 *       Initiative (http://www.opensource.org) must display the 
 *       following acknowledgement in all advertising material:
 *        This product includes software developed at the Courant
 *        Institute of Mathematical Sciences (http://cims.nyu.edu).
 *     * The names of the authors may not be used to endorse or promote products
 *       derived from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED 
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
 * DISCLAIMED. IN NO EVENT SHALL ThE AUTHORS BE LIABLE FOR ANY
 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 ***************************************************************************/

#ifndef CAMERA_SHMEM_H_
#define CAMERA_SHMEM_H_

#include "camera.h"

#ifndef __WINDOWS__

#include <sys/types.h>
#include <sys/ipc.h>
#include <sys/shm.h>

#endif /* __WINDOW__ */

using namespace std;

namespace ebl {

  typedef struct video_buffer {
    char request_frame;
    char frame_ready;
    char bytes_per_pixel;
    char dump_to_file;
    int width;
    int height;
    unsigned char data;
  } t_video_buffer;

  template <typename Tdata> class camera_shmem : public camera<Tdata> {
  public:

    // constructors/allocation

    camera_shmem(const char *shmem_path, int height = -1, int width = -1);

    virtual ~camera_shmem();

    // frame grabbing

    virtual idx<Tdata> grab();

    // members ////////////////////////////////////////////////////////
  protected:
    using camera<Tdata>::frame; 
    using camera<Tdata>::grabbed;       
    using camera<Tdata>::frame_id_;     
    t_video_buffer      *buffer;
#ifndef __WINDOWS__
    key_t                shmem_key;
#endif
    int                  shmem_id;
  };

} // end namespace ebl

#include "camera_shmem.hpp"


#endif /* CAMERA_SHMEM_H_ */