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/* -*- C++ -*- */
/* $Id$ */
/* Copyright (c) 1995 Oregon Graduate Institute of Science and Technology
* P.O.Box 91000-1000, Portland, OR 97291, USA;
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that
* copyright notice and this permission notice appear in supporting
* documentation, and that the name of O.G.I. not be used in advertising or
* publicity pertaining to distribution of the software without specific,
* written prior permission. O.G.I. makes no representations about the
* suitability of this software for any purpose. It is provided "as is"
* without express or implied warranty.
*
* O.G.I. DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
* ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
* O.G.I. BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY
* DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN
* AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
* Author: Shanwei Cen
* Department of Computer Science and Engineering
* email: scen@cse.ogi.edu
*/
#if !defined (MPEG_VIDEO_CONTROL_STATE_H)
#define MPEG_VIDEO_CONTROL_STATE_H
#include "ace/Singleton.h"
#include "mpeg_shared/Video_ControlS.h"
#include "mpeg_server/Video_Control_i.h"
class Video_Control_i;
class Video_Control_State
{
// = TITLE
// Defines an abstract class that is used to implement the state
// pattern for the video control.
//
// = DESCRIPTION
// The various states of the video control are defined by the
// Video_States enum. They can be implemented by subclassing from
// this class and overriding the handle_input method.
public:
Video_Control_State (void);
// constructor
enum Video_States
{
VIDEO_WAITING,
VIDEO_PLAY = 1,
VIDEO_FAST_FORWARD = 2,
VIDEO_FAST_BACKWARD = 3
};
Video_States get_state (void);
// returns the current state
void set_state (Video_States state);
// sets the state
virtual CORBA::Boolean init_video (const Video_Control::INITvideoPara ¶,
Video_Control::INITvideoReply_out reply) ;
virtual CORBA::Boolean stat_stream (CORBA::Char_out ch,
CORBA::Long_out size);
virtual CORBA::Boolean close (void);
virtual CORBA::Boolean stat_sent (void);
virtual CORBA::Boolean fast_forward (const Video_Control::FFpara ¶) ;
virtual CORBA::Boolean fast_backward (const Video_Control::FFpara ¶) ;
virtual CORBA::Boolean step (const Video_Control::STEPpara ¶) ;
virtual CORBA::Boolean play (const Video_Control::PLAYpara ¶,
CORBA::Long_out vts) ;
virtual CORBA::Boolean position (const Video_Control::POSITIONpara ¶) ;
virtual CORBA::Boolean speed (const Video_Control::SPEEDpara ¶) ;
virtual CORBA::Boolean stop (CORBA::Long cmdsn) ;
protected:
Video_States state_;
// State of this object
Video_Control_i *vci_;
};
class Video_Control_Waiting_State : public virtual Video_Control_State
{
// = TITLE
// Defines a class that implements the waiting state of the video
// control state pattern.
public:
Video_Control_Waiting_State (void);
// Default constructor, sets the state to WAITING
virtual CORBA::Boolean stat_stream (CORBA::Char_out ch,
CORBA::Long_out size);
virtual CORBA::Boolean close (void);
virtual CORBA::Boolean stat_sent (void);
virtual CORBA::Boolean fast_forward (const Video_Control::FFpara ¶);
virtual CORBA::Boolean fast_backward (const Video_Control::FFpara ¶);
virtual CORBA::Boolean step (const Video_Control::STEPpara ¶);
virtual CORBA::Boolean play (const Video_Control::PLAYpara ¶,
CORBA::Long_out vts);
virtual CORBA::Boolean position (const Video_Control::POSITIONpara ¶);
virtual CORBA::Boolean speed (const Video_Control::SPEEDpara ¶);
virtual CORBA::Boolean stop (CORBA::Long cmdsn);
};
class Video_Control_Play_State : public virtual Video_Control_State
{
// = TITLE
// Defines a class that implements the playing state of the video
// control state pattern.
public:
Video_Control_Play_State (void);
// Default constructor, sets the state to VIDEO_PLAY
virtual CORBA::Boolean stop (CORBA::Long cmdsn);
virtual CORBA::Boolean speed (const Video_Control::SPEEDpara ¶);
};
class Video_Control_Fast_Forward_State : public virtual Video_Control_State
{
// = TITLE
// Defines a class that implements the fast_forward state of the video
// control state pattern.
public:
Video_Control_Fast_Forward_State (void);
// Default constructor, sets the state to VIDEO_FAST_FORWARD
CORBA::Boolean close (void);
CORBA::Boolean stop (CORBA::Long cmdsn);
};
class Video_Control_Fast_Backward_State : public virtual Video_Control_State
{
// = TITLE
// Defines a class that implements the fast_backward state of the video
// control state pattern.
public:
Video_Control_Fast_Backward_State (void);
// Default constructor, sets the state to VIDEO_FAST_BACKWARD
CORBA::Boolean close (void);
CORBA::Boolean stop (CORBA::Long cmdsn);
};
typedef ACE_Singleton <Video_Control_Waiting_State, ACE_SYNCH_MUTEX>
VIDEO_CONTROL_WAITING_STATE;
typedef ACE_Singleton <Video_Control_Play_State, ACE_SYNCH_MUTEX>
VIDEO_CONTROL_PLAY_STATE;
typedef ACE_Singleton <Video_Control_Fast_Forward_State, ACE_SYNCH_MUTEX>
VIDEO_CONTROL_FAST_FORWARD_STATE;
typedef ACE_Singleton <Video_Control_Fast_Backward_State, ACE_SYNCH_MUTEX>
VIDEO_CONTROL_FAST_BACKWARD_STATE;
#endif /* MPEG_VIDEO_SERVER_STATE_H */
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