/*  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);
}