root/juggler/tags/1.0.5/Sound/vjSoundFactory.cpp

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 *
 * VR Juggler is (C) Copyright 1998, 1999, 2000 by Iowa State University
 *
 * Original Authors:
 *   Allen Bierbaum, Christopher Just,
 *   Patrick Hartling, Kevin Meinert,
 *   Carolina Cruz-Neira, Albert Baker
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
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 * Library General Public License for more details.
 *
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 * File:          $RCSfile$
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#include <Sound/vjSoundFactory.h>
#include <Sound/vjSoundEngineConstructor.h>


//std::vector< vjSoundEngineConstructorBase* > vjSoundFactory::mConstructors;
//vjSoundFactory* vjSoundFactory::_instance = NULL;   //: The singleton instance ptr
vjSingletonImp(vjSoundFactory);

vjSoundFactory::vjSoundFactory()
{
}

// register a creator to the factory.
// this is intended to be used by each api's registration method

void vjSoundFactory::registerConstructor( vjSoundEngineConstructorBase* constructor )
{
   vjASSERT(constructor != NULL);
   mConstructors.push_back(constructor);     // Add the constructor to the list
   std::cout << "vjSoundFactory::registerConstructor: Sound engine registered for: "
             << constructor->getChunkType().c_str()
             << "   :" << (void*)constructor
             << " type:" << typeid(*constructor).name() << std::endl;
}

bool vjSoundFactory::recognizeEngine(vjConfigChunk* chunk)
{
        if(vjSoundFactory::findConstructor(chunk) == -1)
      return false;
   else
      return true;
}


vjSoundEngine* vjSoundFactory::loadEngine(vjConfigChunk* chunk)
{
        vjASSERT(recognizeEngine(chunk));

   int index = findConstructor(chunk);

   vjSoundEngine* new_engine;
   vjSoundEngineConstructorBase* constructor = mConstructors[index];

   vjDEBUG(vjDBG_INPUT_MGR,3) << "vjSoundFactory::loadEngine: Loading device: "
              << chunk->getType() << "  with: "
              << typeid(*constructor).name() << std::endl << vjDEBUG_FLUSH;

   new_engine = constructor->createEngine(chunk);
   return new_engine;
}

int vjSoundFactory::findConstructor(vjConfigChunk* chunk)
{
   std::string chunk_type;
   chunk_type = (std::string)chunk->getType();
   
   for (unsigned int i = 0; i < mConstructors.size(); i++)
   {
      // Get next constructor
      vjSoundEngineConstructorBase* construct = mConstructors[i];
      vjASSERT(construct != NULL);

      if(construct->getChunkType() == chunk_type)
         return i;
   }

   return -1;
}