facade.cpp

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/*
  Facade  -  access point for communicating with the Steam-Interface
 
   Copyright (C)
     2008,            Hermann Vosseler <Ichthyostega@web.de>
 
 **Lumiera** 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. See the file COPYING for further details.
 
* *****************************************************************/
 
 
#include "steam/facade.hpp"
#include "lib/depend.hpp"
#include "steam/control/steam-dispatcher.hpp"
#include "steam/play/output-director.hpp"
 
#include <string>
 
 
namespace steam {
  
  using std::string;
  using std::unique_ptr;
  using lumiera::Subsys;
  using lumiera::Option;
  using steam::control::SteamDispatcher;
  
  
  class SessionSubsystem
    : public Subsys
    {
      operator string()  const { return "Session"; }
      
      bool 
      shouldStart (Option&)  override
        {
          return false;
        }
      
      bool
      start (Option&, Subsys::SigTerm termNotification)  override
        {
          return SteamDispatcher::instance().start (termNotification);
        }
      
      void
      triggerShutdown()  noexcept override
        {
          SteamDispatcher::instance().requestStop();
        }
      
      bool
      checkRunningState()  noexcept override
        {
          return SteamDispatcher::instance().isRunning();
        }
    };
  
  
  
  class PlayOutSubsysDescriptor
    : public Subsys
    {
      operator string()  const { return "PlayOut"; }
      
      bool
      shouldStart (Option&)  override
        {
          TODO ("extract options about specific output systems to be brought up");
          return false;
        }
      
      bool
      start (Option&, Subsys::SigTerm termination)  override
        {
          this->completedSignal_ = termination;
          return play::OutputDirector::instance().connectUp();
        }
      
      SigTerm completedSignal_;
      
      
      void
      triggerShutdown()  noexcept override
        {
          play::OutputDirector::instance().triggerDisconnect (completedSignal_);
        }
      
      
      bool
      checkRunningState()  noexcept override
        {
          return play::OutputDirector::instance().isOperational();
        }
    };
  
  namespace {
    lib::Depend<SessionSubsystem> theSessionSubsystemLifecycle;
    lib::Depend<PlayOutSubsysDescriptor> thePlayOutDescriptor;
  }
  
  
  
  
  Subsys&
  Facade::getSessionDescriptor()
  {
    return theSessionSubsystemLifecycle();
  }
  
  
  Subsys&
  Facade::getPlayOutDescriptor()
  {
    return thePlayOutDescriptor();
  }
 
 
 
} // namespace steam