h281.h

Go to the documentation of this file.

/*
 * h281.h
 *
 * H.281 PDU implementation for the OpenH323 Project.
 *
 * Copyright (c) 2006 Network for Educational Technology, ETH Zurich.
 * Written by Hannes Friederich.
 *
 * The contents of this file are subject to the Mozilla Public License
 * Version 1.0 (the "License"); you may not use this file except in
 * compliance with the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS"
 * basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
 * the License for the specific language governing rights and limitations
 * under the License.
 *
 * Contributor(s): ______________________________________.
 *
 * $Revision: 21324 $
 * $Author: hfriederich $
 * $Date: 2008-10-14 07:12:32 +0000 (Tue, 14 Oct 2008) $
 */

#ifndef OPAL_H224_H281_H
#define OPAL_H224_H281_H

#ifdef P_USE_PRAGMA
#pragma interface
#endif

#ifndef _PTLIB_H
#include <ptlib.h>
#endif

#include <h224/h224.h>

class H281_Frame : public H224_Frame
{
  PCLASSINFO(H281_Frame, H224_Frame);
        
public:
        
  enum RequestType {
    IllegalRequest      = 0x00,
    StartAction         = 0x01,
    ContinueAction      = 0x02,
    StopAction          = 0x03,
    SelectVideoSource     = 0x04,
    VideoSourceSwitched = 0x05,
    StoreAsPreset       = 0x07,
    ActivatePreset      = 0x08
  };
        
  enum PanDirection {
    NoPan       = 0x00,
    IllegalPan  = 0x40,
    PanLeft     = 0x80,
    PanRight    = 0xc0,
  };
        
  enum TiltDirection {
    NoTilt      = 0x00,
    IllegalTilt = 0x10,
    TiltDown    = 0x20,
    TiltUp      = 0x30,
  };
        
  enum ZoomDirection {
    NoZoom      = 0x00,
    IllegalZoom = 0x04,
    ZoomOut     = 0x08,
    ZoomIn      = 0x0c
  };
        
  enum FocusDirection {
    NoFocus       = 0x00,
    IllegalFocus  = 0x01,
    FocusOut      = 0x02,
    FocusIn       = 0x03
  };
        
  enum VideoMode {      
    MotionVideo                 = 0x00,
    IllegalVideoMode            = 0x01,
    NormalResolutionStillImage  = 0x02,
    DoubleResolutionStillImage  = 0x03
  };
        
  H281_Frame();
  ~H281_Frame();
        
  RequestType GetRequestType() const { return (RequestType)(GetClientDataPtr())[0]; }
  void SetRequestType(RequestType requestType);
        
  // The following methods are only valid when
  // request type is either StartAction, ContinueAction or StopAction   
  PanDirection GetPanDirection() const;
  void SetPanDirection(PanDirection direction);
        
  TiltDirection GetTiltDirection() const;
  void SetTiltDirection(TiltDirection direction);

  ZoomDirection GetZoomDirection() const;
  void SetZoomDirection(ZoomDirection direction);
        
  FocusDirection GetFocusDirection() const;
  void SetFocusDirection(FocusDirection direction);
        
  // Only valid when RequestType is StartAction
  BYTE GetTimeout() const;
  void SetTimeout(BYTE timeout);
        
  // Only valid when RequestType is SelectVideoSource or VideoSourceSwitched
  BYTE GetVideoSourceNumber() const;
  void SetVideoSourceNumber(BYTE videoSourceNumber);
        
  VideoMode GetVideoMode() const;
  void SetVideoMode(VideoMode videoMode);
        
  // Only valid when RequestType is StoreAsPreset or ActivatePreset
  BYTE GetPresetNumber() const;
  void SetPresetNumber(BYTE presetNumber);
};

#endif // OPAL_H224_H281_H

---