zoneminder/src/zm_camera.h

//
// ZoneMinder Camera Class Interface, $Date$, $Revision$
// Copyright (C) 2001-2008 Philip Coombes
// 
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.
// 
// This program 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 General Public License for more details.
// 
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
// 

#ifndef ZM_CAMERA_H
#define ZM_CAMERA_H

#include <sys/types.h>
#include <sys/ioctl.h>

#include "zm_image.h"
#include "zm_packet.h"

class Camera;

#include "zm_monitor.h"

//
// Abstract base class for cameras. This is intended just to express
// common attributes
//
class Camera {
protected:
  typedef enum { LOCAL_SRC, REMOTE_SRC, FILE_SRC, FFMPEG_SRC, LIBVLC_SRC, CURL_SRC } SourceType;

  unsigned int  monitor_id;
  Monitor *     monitor; // Null on instantiation, set as soon as possible.
  SourceType    type;
  unsigned int  width;
  unsigned int  height;
  unsigned int  colours;
  unsigned int  subpixelorder;
  unsigned int  pixels;
  unsigned int  imagesize;
  int           brightness;
  int           hue;
  int           colour;
  int           contrast;
  bool          capture;
  bool          record_audio;
  unsigned int bytes;


    int                 mVideoStreamId;
    int                 mAudioStreamId;
    AVCodecContext      *mVideoCodecContext;
    AVCodecContext      *mAudioCodecContext;
    AVStream *video_stream;

public:
  Camera(
      unsigned int p_monitor_id,
      SourceType p_type,
      unsigned int p_width,
      unsigned int p_height,
      int p_colours,
      int p_subpixelorder,
      int p_brightness,
      int p_contrast,
      int p_hue,
      int p_colour,
      bool p_capture,
      bool p_record_audio
      );
  virtual ~Camera();

  unsigned int getId() const { return( monitor_id ); }
  Monitor *getMonitor();
  void  setMonitor( Monitor *p_monitor );
  SourceType Type() const { return( type ); }
  bool IsLocal() const { return( type == LOCAL_SRC ); }
  bool IsRemote() const { return( type == REMOTE_SRC ); }
  bool IsFile() const { return( type == FILE_SRC ); }
  bool IsFfmpeg() const { return( type == FFMPEG_SRC ); }
  bool IsLibvlc() const { return( type == LIBVLC_SRC ); }
  bool IscURL() const { return( type == CURL_SRC ); }
  unsigned int Width() const { return( width ); }
  unsigned int Height() const { return( height ); }
  unsigned int Colours() const { return colours; }
  unsigned int SubpixelOrder() const { return( subpixelorder ); }
  unsigned int Pixels() const { return( pixels ); }
  unsigned int ImageSize() const { return( imagesize ); }
  unsigned int Bytes() const { return bytes; };

  virtual int Brightness( int/*p_brightness*/=-1 ) { return( -1 ); }
  virtual int Hue( int/*p_hue*/=-1 ) { return( -1 ); }
  virtual int Colour( int/*p_colour*/=-1 ) { return( -1 ); }
  virtual int Contrast( int/*p_contrast*/=-1 ) { return( -1 ); }

  bool CanCapture() const { return( capture ); }

  bool SupportsNativeVideo() const {
    return (type == FFMPEG_SRC);
    //return (type == FFMPEG_SRC )||(type == REMOTE_SRC);
  }

  virtual int PrimeCapture() { return( 0 ); }
  virtual int PreCapture()=0;
  virtual int Capture(ZMPacket &p)=0;
  virtual int PostCapture()=0;
  virtual AVStream      *get_VideoStream() { return NULL; };
  virtual AVStream      *get_AudioStream() { return NULL; };
  virtual AVCodecContext     *get_VideoCodecContext() { return NULL; };
  virtual AVCodecContext     *get_AudioCodecContext() { return NULL; };
  int            get_VideoStreamId() { return mVideoStreamId; };
  int            get_AudioStreamId() { return mAudioStreamId; };
  virtual int Close()=0;
};

#endif // ZM_CAMERA_H