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/*  Project nGenEx
    Destroyer Studios LLC
    Copyright © 1997-2004. All Rights Reserved.

    SUBSYSTEM:    nGenEx.lib
    FILE:         SoundCard.cpp
    AUTHOR:       John DiCamillo


    OVERVIEW
    ========
    Abstract sound card class
*/

#include "MemDebug.h"
#include "SoundCard.h"
#include "Sound.h"

// +--------------------------------------------------------------------+

DWORD WINAPI SoundCardUpdateProc(LPVOID link);

// +--------------------------------------------------------------------+

SoundCard::SoundCard()
   : status(SC_UNINITIALIZED), hthread(0), shutdown(false)
{
   DWORD thread_id = 0;
   hthread = CreateThread(0, 4096, SoundCardUpdateProc,
                           (LPVOID) this, 0, &thread_id);
}

// +--------------------------------------------------------------------+

SoundCard::~SoundCard()
{
   shutdown = true;

   WaitForSingleObject(hthread, 500);
   CloseHandle(hthread);
   hthread = 0;

   sounds.destroy();
   status = SC_UNINITIALIZED;
}

// +--------------------------------------------------------------------+

DWORD WINAPI SoundCardUpdateProc(LPVOID link)
{
   SoundCard* card = (SoundCard*) link;

   if (card)
      return card->UpdateThread();

   return (DWORD) E_POINTER;
}

// +--------------------------------------------------------------------+

DWORD
SoundCard::UpdateThread()
{
   while (!shutdown) {
      Update();
      Sleep(50);
   }

   return 0;
}

// +--------------------------------------------------------------------+

void
SoundCard::Update()
{
   AutoThreadSync a(sync);

   ListIter<Sound> iter = sounds;
   while (++iter) {
      Sound* s = iter.value();

      s->Update();

      if (s->GetStatus() == Sound::DONE &&
        !(s->GetFlags()  &  Sound::LOCKED)) {

         delete iter.removeItem();
      }
   }
}

// +--------------------------------------------------------------------+

void
SoundCard::AddSound(Sound* s)
{
   AutoThreadSync a(sync);

   if (!sounds.contains(s))
      sounds.append(s);
}