00001
00002 /***************************************************************************
00003  *  shmem.h - This header defines a reader for shared memory images
00004  *
00005  *  Created: Thu Jan 12 19:41:17 2006
00006  *  Copyright  2005-2009  Tim Niemueller [www.niemueller.de]
00007  *
00008  ****************************************************************************/
00009
00010 /*  This program is free software; you can redistribute it and/or modify
00011  *  it under the terms of the GNU General Public License as published by
00012  *  the Free Software Foundation; either version 2 of the License, or
00013  *  (at your option) any later version. A runtime exception applies to
00014  *  this software (see LICENSE.GPL_WRE file mentioned below for details).
00015  *
00016  *  This program is distributed in the hope that it will be useful,
00017  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
00018  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00019  *  GNU Library General Public License for more details.
00020  *
00021  *  Read the full text in the LICENSE.GPL_WRE file in the doc directory.
00022  */
00023
00024 #ifndef __FIREVISION_CAMS_SHMEM_H_
00025 #define __FIREVISION_CAMS_SHMEM_H_
00026 
00027 #include <cams/camera.h>
00028 #include <fvutils/color/colorspaces.h>
00029 #include <fvutils/ipc/shm_image.h>
00030
00031 class CameraArgumentParser;
00032
00033 class SharedMemoryCamera : public Camera
00034 {
00035
00036  public:
00037
00038   SharedMemoryCamera(const char *image_id, bool deep_copy = false);
00039   SharedMemoryCamera(const CameraArgumentParser *cap);
00040   ~SharedMemoryCamera();
00041
00042   virtual void open();
00043   virtual void start();
00044   virtual void stop();
00045   virtual void close();
00046   virtual void flush();
00047   virtual void capture();
00048   virtual void print_info();
00049
00050   virtual bool ready();
00051
00052   virtual unsigned char* buffer();
00053   virtual unsigned int   buffer_size();
00054   virtual void           dispose_buffer();
00055
00056   virtual unsigned int   pixel_width();
00057   virtual unsigned int   pixel_height();
00058   virtual colorspace_t   colorspace();
00059   virtual fawkes::Time * capture_time();
00060
00061   virtual void           set_image_number(unsigned int n);
00062
00063   SharedMemoryImageBuffer *  shared_memory_image_buffer();
00064
00065   virtual void           lock_for_read();
00066   virtual bool           try_lock_for_read();
00067   virtual void           lock_for_write();
00068   virtual bool           try_lock_for_write();
00069   virtual void           unlock();
00070
00071  private:
00072   void init();
00073
00074   bool          __deep_copy;
00075   bool          __opened;
00076   unsigned int  __width;
00077   unsigned int  __height;
00078   char *        __image_id;
00079
00080   SharedMemoryImageBuffer  *__shm_buffer;
00081
00082   unsigned char *__deep_buffer;
00083
00084   fawkes::Time *__capture_time;
00085 };
00086
00087 #endif