stypemanager.hpp

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/*
  STYPEMANAGER.hpp  -  entry point for dealing with media stream types

  Copyright (C)         Lumiera.org
    2008,               Hermann Vosseler <Ichthyostega@web.de>

  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., 675 Mass Ave, Cambridge, MA 02139, USA.

*/


#ifndef STEAM_CONTROL_STYPEMANAGER_H
#define STEAM_CONTROL_STYPEMANAGER_H


#include "steam/streamtype.hpp"
#include "lib/depend.hpp"

#include <memory>


namespace steam {
namespace control {
  
  using lib::Symbol;
  
  
  class STypeManager
    {
      
      class Registry;
      std::unique_ptr<Registry> reg_;
      
    public:
      static lib::Depend<STypeManager> instance;
      
      typedef StreamType::ImplFacade ImplFacade;
      
      
      StreamType const& getType (Symbol sTypeID) ;
      
      StreamType const& getType (StreamType::ID stID) ;
      
      StreamType const& getType (StreamType::Prototype const& protoType) ;
      
      StreamType const& getType (StreamType::ImplFacade const& implType) ;
      
      ImplFacade const& getImpl (Symbol libID, StreamType::Prototype const& protoType) ;
      
      template<class TY>
      ImplFacade const& getImpl (Symbol libID, TY& rawType) ;
      
      
      
    protected:
      STypeManager() ;
      ~STypeManager();
      
      friend class lib::DependencyFactory<STypeManager>;
      
      void reset() ;
      
    private:
      ImplFacade const& fetchImpl (StreamType::ImplFacade::TypeTag);
    };
  
  extern const char* ON_STREAMTYPES_RESET;  
  
  
  template<class TY>
  StreamType::ImplFacade const&
  STypeManager::getImpl (Symbol libID, TY& rawType)
  {
    return fetchImpl (ImplFacade::TypeTag (libID,rawType));
  }
  
  
}} // namespace steam::control


namespace proc_interface {
  
  using steam::control::STypeManager;


} // namespace proc_interface


extern "C" { //TODO provide a separate header if some C code or plugin happens to need this...
  
  void
  lumiera_StreamType_registerInitFunction (void setupFun(void));
  
  // TODO provide a C interface usable from such a setupFun to access the STypeManager registration functions.
}


#endif