/*  			DirectSound
 *
 * Copyright 1998 Marcus Meissner
 * Copyright 1998 Rob Riggs
 * Copyright 2000-2001 TransGaming Technologies, Inc.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
/*
 * Most thread locking is complete. There may be a few race
 * conditions still lurking.
 *
 * Tested with a Soundblaster clone, a Gravis UltraSound Classic,
 * and a Turtle Beach Tropez+.
 *
 * TODO:
 *	Implement SetCooperativeLevel properly (need to address focus issues)
 *	Implement DirectSound3DBuffers (stubs in place)
 *	Use hardware 3D support if available
 *      Add critical section locking inside Release and AddRef methods
 *      Handle static buffers - put those in hardware, non-static not in hardware
 *      Hardware DuplicateSoundBuffer
 *      Proper volume calculation, and setting volume in HEL primary buffer
 *      Optimize WINMM and negotiate fragment size, decrease DS_HEL_MARGIN
 */

#include "config.h"
#include <assert.h>
#include <stdio.h>
#include <sys/types.h>
#include <sys/fcntl.h>
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
#include <stdlib.h>
#include <string.h>
#include <math.h>	/* Insomnia - pow() function */

#include "windef.h"
#include "winbase.h"
#include "wingdi.h"
#include "winuser.h"
#include "winerror.h"
#include "mmsystem.h"
#include "winternl.h"
#include "mmddk.h"
#include "wine/windef16.h"
#include "wine/debug.h"
#include "dsound.h"
#include "dsdriver.h"
#include "dsound_private.h"

WINE_DEFAULT_DEBUG_CHANNEL(dsound);


/*******************************************************************************
 *              IDirectSound3DBuffer
 */

/* IUnknown methods */
static HRESULT WINAPI IDirectSound3DBufferImpl_QueryInterface(
	LPDIRECTSOUND3DBUFFER iface, REFIID riid, LPVOID *ppobj)
{
	ICOM_THIS(IDirectSound3DBufferImpl,iface);

	TRACE("(%p,%s,%p)\n",This,debugstr_guid(riid),ppobj);
	return IDirectSoundBuffer_QueryInterface((LPDIRECTSOUNDBUFFER8)This->dsb, riid, ppobj);
}

static ULONG WINAPI IDirectSound3DBufferImpl_AddRef(LPDIRECTSOUND3DBUFFER iface)
{
	ICOM_THIS(IDirectSound3DBufferImpl,iface);
	ULONG ulReturn;

	TRACE("(%p) ref was %ld\n", This, This->ref);
	ulReturn = InterlockedIncrement(&This->ref);
	if (ulReturn == 1)
		IDirectSoundBuffer8_AddRef((LPDIRECTSOUNDBUFFER8)This->dsb);
	return ulReturn;
}

static ULONG WINAPI IDirectSound3DBufferImpl_Release(LPDIRECTSOUND3DBUFFER iface)
{
	ICOM_THIS(IDirectSound3DBufferImpl,iface);
	ULONG ulReturn;

	TRACE("(%p) ref was %ld\n", This, This->ref);

	ulReturn = InterlockedDecrement(&This->ref);
	if(ulReturn)
		return ulReturn;

	if (This->dsb) {
		BOOL std = (This->dsb->dsbd.dwFlags & DSBCAPS_CTRL3D);

		IDirectSoundBuffer8_Release((LPDIRECTSOUNDBUFFER8)This->dsb);

		if (std)
			return 0; /* leave it to IDirectSoundBufferImpl_Release */
	}

	if (This->dsb->ds3db == This) This->dsb->ds3db = NULL;

	DeleteCriticalSection(&This->lock);

	HeapFree(GetProcessHeap(),0,This);

	return 0;
}

/* IDirectSound3DBuffer methods */
static HRESULT WINAPI IDirectSound3DBufferImpl_GetAllParameters(
	LPDIRECTSOUND3DBUFFER iface,
	LPDS3DBUFFER lpDs3dBuffer)
{
	ICOM_THIS(IDirectSound3DBufferImpl,iface);
	TRACE("returning: all parameters\n");
	*lpDs3dBuffer = This->ds3db;
	return DS_OK;
}

static HRESULT WINAPI IDirectSound3DBufferImpl_GetConeAngles(
	LPDIRECTSOUND3DBUFFER iface,
	LPDWORD lpdwInsideConeAngle,
	LPDWORD lpdwOutsideConeAngle)
{
	ICOM_THIS(IDirectSound3DBufferImpl,iface);
	TRACE("returning: Inside Cone Angle = %ld degrees; Outside Cone Angle = %ld degrees\n", This->ds3db.dwInsideConeAngle, This->ds3db.dwOutsideConeAngle);
	*lpdwInsideConeAngle = This->ds3db.dwInsideConeAngle;
	*lpdwOutsideConeAngle = This->ds3db.dwOutsideConeAngle;
	return DS_OK;
}

static HRESULT WINAPI IDirectSound3DBufferImpl_GetConeOrientation(
	LPDIRECTSOUND3DBUFFER iface,
	LPD3DVECTOR lpvConeOrientation)
{
	ICOM_THIS(IDirectSound3DBufferImpl,iface);
	TRACE("returning: Cone Orientation vector = (%f,%f,%f)\n", This->ds3db.vConeOrientation.u1.x, This->ds3db.vConeOrientation.u2.y, This->ds3db.vConeOrientation.u3.z);
	*lpvConeOrientation = This->ds3db.vConeOrientation;
	return DS_OK;
}

static HRESULT WINAPI IDirectSound3DBufferImpl_GetConeOutsideVolume(
	LPDIRECTSOUND3DBUFFER iface,
	LPLONG lplConeOutsideVolume)
{
	ICOM_THIS(IDirectSound3DBufferImpl,iface);
	TRACE("returning: Cone Outside Volume = %ld\n", This->ds3db.lConeOutsideVolume);
	*lplConeOutsideVolume = This->ds3db.lConeOutsideVolume;
	return DS_OK;
}

static HRESULT WINAPI IDirectSound3DBufferImpl_GetMaxDistance(
	LPDIRECTSOUND3DBUFFER iface,
	LPD3DVALUE lpfMaxDistance)
{
	ICOM_THIS(IDirectSound3DBufferImpl,iface);
	TRACE("returning: Max Distance = %f\n", This->ds3db.flMaxDistance);
	*lpfMaxDistance = This->ds3db.flMaxDistance;
	return DS_OK;
}

static HRESULT WINAPI IDirectSound3DBufferImpl_GetMinDistance(
	LPDIRECTSOUND3DBUFFER iface,
	LPD3DVALUE lpfMinDistance)
{
	ICOM_THIS(IDirectSound3DBufferImpl,iface);
	TRACE("returning: Min Distance = %f\n", This->ds3db.flMinDistance);
	*lpfMinDistance = This->ds3db.flMinDistance;
	return DS_OK;
}

static HRESULT WINAPI IDirectSound3DBufferImpl_GetMode(
	LPDIRECTSOUND3DBUFFER iface,
	LPDWORD lpdwMode)
{
	ICOM_THIS(IDirectSound3DBufferImpl,iface);
	TRACE("returning: Mode = %ld\n", This->ds3db.dwMode);
	*lpdwMode = This->ds3db.dwMode;
	return DS_OK;
}

static HRESULT WINAPI IDirectSound3DBufferImpl_GetPosition(
	LPDIRECTSOUND3DBUFFER iface,
	LPD3DVECTOR lpvPosition)
{
	ICOM_THIS(IDirectSound3DBufferImpl,iface);
	TRACE("returning: Position vector = (%f,%f,%f)\n", This->ds3db.vPosition.u1.x, This->ds3db.vPosition.u2.y, This->ds3db.vPosition.u1.x);
	*lpvPosition = This->ds3db.vPosition;
	return DS_OK;
}

static HRESULT WINAPI IDirectSound3DBufferImpl_GetVelocity(
	LPDIRECTSOUND3DBUFFER iface,
	LPD3DVECTOR lpvVelocity)
{
	ICOM_THIS(IDirectSound3DBufferImpl,iface);
	TRACE("returning: Velocity vector = (%f,%f,%f)\n", This->ds3db.vVelocity.u1.x, This->ds3db.vVelocity.u2.y, This->ds3db.vVelocity.u3.z);
	*lpvVelocity = This->ds3db.vVelocity;
	return DS_OK;
}

static HRESULT WINAPI IDirectSound3DBufferImpl_SetAllParameters(
	LPDIRECTSOUND3DBUFFER iface,
	LPCDS3DBUFFER lpcDs3dBuffer,
	DWORD dwApply)
{
	FIXME("stub\n");
	return DS_OK;
}

static HRESULT WINAPI IDirectSound3DBufferImpl_SetConeAngles(
	LPDIRECTSOUND3DBUFFER iface,
	DWORD dwInsideConeAngle,
	DWORD dwOutsideConeAngle,
	DWORD dwApply)
{
	FIXME("stub\n");
	return DS_OK;
}

static HRESULT WINAPI IDirectSound3DBufferImpl_SetConeOrientation(
	LPDIRECTSOUND3DBUFFER iface,
	D3DVALUE x, D3DVALUE y, D3DVALUE z,
	DWORD dwApply)
{
	FIXME("stub\n");
	return DS_OK;
}

static HRESULT WINAPI IDirectSound3DBufferImpl_SetConeOutsideVolume(
	LPDIRECTSOUND3DBUFFER iface,
	LONG lConeOutsideVolume,
	DWORD dwApply)
{
	FIXME("stub\n");
	return DS_OK;
}

static HRESULT WINAPI IDirectSound3DBufferImpl_SetMaxDistance(
	LPDIRECTSOUND3DBUFFER iface,
	D3DVALUE fMaxDistance,
	DWORD dwApply)
{
	FIXME("stub\n");
	return DS_OK;
}

static HRESULT WINAPI IDirectSound3DBufferImpl_SetMinDistance(
	LPDIRECTSOUND3DBUFFER iface,
	D3DVALUE fMinDistance,
	DWORD dwApply)
{
	FIXME("stub\n");
	return DS_OK;
}

static HRESULT WINAPI IDirectSound3DBufferImpl_SetMode(
	LPDIRECTSOUND3DBUFFER iface,
	DWORD dwMode,
	DWORD dwApply)
{
	ICOM_THIS(IDirectSound3DBufferImpl,iface);
	TRACE("mode = %lx\n", dwMode);
	This->ds3db.dwMode = dwMode;
	return DS_OK;
}

static HRESULT WINAPI IDirectSound3DBufferImpl_SetPosition(
	LPDIRECTSOUND3DBUFFER iface,
	D3DVALUE x, D3DVALUE y, D3DVALUE z,
	DWORD dwApply)
{
	FIXME("stub\n");
	return DS_OK;
}

static HRESULT WINAPI IDirectSound3DBufferImpl_SetVelocity(
	LPDIRECTSOUND3DBUFFER iface,
	D3DVALUE x, D3DVALUE y, D3DVALUE z,
	DWORD dwApply)
{
	FIXME("stub\n");
	return DS_OK;
}

static ICOM_VTABLE(IDirectSound3DBuffer) ds3dbvt =
{
	ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
	/* IUnknown methods */
	IDirectSound3DBufferImpl_QueryInterface,
	IDirectSound3DBufferImpl_AddRef,
	IDirectSound3DBufferImpl_Release,
	/* IDirectSound3DBuffer methods */
	IDirectSound3DBufferImpl_GetAllParameters,
	IDirectSound3DBufferImpl_GetConeAngles,
	IDirectSound3DBufferImpl_GetConeOrientation,
	IDirectSound3DBufferImpl_GetConeOutsideVolume,
	IDirectSound3DBufferImpl_GetMaxDistance,
	IDirectSound3DBufferImpl_GetMinDistance,
	IDirectSound3DBufferImpl_GetMode,
	IDirectSound3DBufferImpl_GetPosition,
	IDirectSound3DBufferImpl_GetVelocity,
	IDirectSound3DBufferImpl_SetAllParameters,
	IDirectSound3DBufferImpl_SetConeAngles,
	IDirectSound3DBufferImpl_SetConeOrientation,
	IDirectSound3DBufferImpl_SetConeOutsideVolume,
	IDirectSound3DBufferImpl_SetMaxDistance,
	IDirectSound3DBufferImpl_SetMinDistance,
	IDirectSound3DBufferImpl_SetMode,
	IDirectSound3DBufferImpl_SetPosition,
	IDirectSound3DBufferImpl_SetVelocity,
};

HRESULT WINAPI IDirectSound3DBufferImpl_Create(
	IDirectSoundBufferImpl *This,
	IDirectSound3DBufferImpl **pds3db)
{
	IDirectSound3DBufferImpl *ds3db;

	ds3db = (IDirectSound3DBufferImpl*)HeapAlloc(GetProcessHeap(),0,sizeof(*ds3db));
	ds3db->ref = 0;
	ds3db->dsb = This;
	ICOM_VTBL(ds3db) = &ds3dbvt;
	InitializeCriticalSection(&ds3db->lock);

	ds3db->ds3db.dwSize = sizeof(DS3DBUFFER);
	ds3db->ds3db.vPosition.u1.x = 0.0;
	ds3db->ds3db.vPosition.u2.y = 0.0;
	ds3db->ds3db.vPosition.u3.z = 0.0;
	ds3db->ds3db.vVelocity.u1.x = 0.0;
	ds3db->ds3db.vVelocity.u2.y = 0.0;
	ds3db->ds3db.vVelocity.u3.z = 0.0;
	ds3db->ds3db.dwInsideConeAngle = DS3D_DEFAULTCONEANGLE;
	ds3db->ds3db.dwOutsideConeAngle = DS3D_DEFAULTCONEANGLE;
	ds3db->ds3db.vConeOrientation.u1.x = 0.0;
	ds3db->ds3db.vConeOrientation.u2.y = 0.0;
	ds3db->ds3db.vConeOrientation.u3.z = 0.0;
	ds3db->ds3db.lConeOutsideVolume = DS3D_DEFAULTCONEOUTSIDEVOLUME;
	ds3db->ds3db.flMinDistance = DS3D_DEFAULTMINDISTANCE;
	ds3db->ds3db.flMaxDistance = DS3D_DEFAULTMAXDISTANCE;
	ds3db->ds3db.dwMode = DS3DMODE_NORMAL;

	*pds3db = ds3db;
	return S_OK;
}

/*******************************************************************************
 *	      IDirectSound3DListener
 */

/* IUnknown methods */
static HRESULT WINAPI IDirectSound3DListenerImpl_QueryInterface(
	LPDIRECTSOUND3DLISTENER iface, REFIID riid, LPVOID *ppobj)
{
	ICOM_THIS(IDirectSound3DListenerImpl,iface);

	TRACE("(%p,%s,%p)\n",This,debugstr_guid(riid),ppobj);
	return IDirectSoundBuffer_QueryInterface((LPDIRECTSOUNDBUFFER8)This->dsb, riid, ppobj);
}

static ULONG WINAPI IDirectSound3DListenerImpl_AddRef(LPDIRECTSOUND3DLISTENER iface)
{
	ICOM_THIS(IDirectSound3DListenerImpl,iface);
	return InterlockedIncrement(&This->ref);
}

static ULONG WINAPI IDirectSound3DListenerImpl_Release(LPDIRECTSOUND3DLISTENER iface)
{
	ICOM_THIS(IDirectSound3DListenerImpl,iface);
	ULONG ulReturn;

	TRACE("(%p) ref was %ld\n", This, This->ref);

	ulReturn = InterlockedDecrement(&This->ref);

	/* Free all resources */
	if( ulReturn == 0 ) {
		if(This->dsb)
			IDirectSoundBuffer8_Release((LPDIRECTSOUNDBUFFER8)This->dsb);
		DeleteCriticalSection(&This->lock);
		HeapFree(GetProcessHeap(),0,This);
	}

	return ulReturn;
}

/* IDirectSound3DListener methods */
static HRESULT WINAPI IDirectSound3DListenerImpl_GetAllParameter(
	LPDIRECTSOUND3DLISTENER iface,
	LPDS3DLISTENER lpDS3DL)
{
	ICOM_THIS(IDirectSound3DListenerImpl,iface);
	TRACE("returning: all parameters\n");
	*lpDS3DL = This->ds3dl;
	return DS_OK;
}

static HRESULT WINAPI IDirectSound3DListenerImpl_GetDistanceFactor(
	LPDIRECTSOUND3DLISTENER iface,
	LPD3DVALUE lpfDistanceFactor)
{
	ICOM_THIS(IDirectSound3DListenerImpl,iface);
	TRACE("returning: Distance Factor = %f\n", This->ds3dl.flDistanceFactor);
	*lpfDistanceFactor = This->ds3dl.flDistanceFactor;
	return DS_OK;
}

static HRESULT WINAPI IDirectSound3DListenerImpl_GetDopplerFactor(
	LPDIRECTSOUND3DLISTENER iface,
	LPD3DVALUE lpfDopplerFactor)
{
	ICOM_THIS(IDirectSound3DListenerImpl,iface);
	TRACE("returning: Doppler Factor = %f\n", This->ds3dl.flDopplerFactor);
	*lpfDopplerFactor = This->ds3dl.flDopplerFactor;
	return DS_OK;
}

static HRESULT WINAPI IDirectSound3DListenerImpl_GetOrientation(
	LPDIRECTSOUND3DLISTENER iface,
	LPD3DVECTOR lpvOrientFront,
	LPD3DVECTOR lpvOrientTop)
{
	ICOM_THIS(IDirectSound3DListenerImpl,iface);
	TRACE("returning: OrientFront vector = (%f,%f,%f); OrientTop vector = (%f,%f,%f)\n", This->ds3dl.vOrientFront.u1.x, \
	This->ds3dl.vOrientFront.u2.y, This->ds3dl.vOrientFront.u3.z, This->ds3dl.vOrientTop.u1.x, This->ds3dl.vOrientTop.u2.y, \
	This->ds3dl.vOrientTop.u3.z);
	*lpvOrientFront = This->ds3dl.vOrientFront;
	*lpvOrientTop = This->ds3dl.vOrientTop;
	return DS_OK;
}

static HRESULT WINAPI IDirectSound3DListenerImpl_GetPosition(
	LPDIRECTSOUND3DLISTENER iface,
	LPD3DVECTOR lpvPosition)
{
	ICOM_THIS(IDirectSound3DListenerImpl,iface);
	TRACE("returning: Position vector = (%f,%f,%f)\n", This->ds3dl.vPosition.u1.x, This->ds3dl.vPosition.u2.y, This->ds3dl.vPosition.u3.z);
	*lpvPosition = This->ds3dl.vPosition;
	return DS_OK;
}

static HRESULT WINAPI IDirectSound3DListenerImpl_GetRolloffFactor(
	LPDIRECTSOUND3DLISTENER iface,
	LPD3DVALUE lpfRolloffFactor)
{
	ICOM_THIS(IDirectSound3DListenerImpl,iface);
	TRACE("returning: RolloffFactor = %f\n", This->ds3dl.flRolloffFactor);
	*lpfRolloffFactor = This->ds3dl.flRolloffFactor;
	return DS_OK;
}

static HRESULT WINAPI IDirectSound3DListenerImpl_GetVelocity(
	LPDIRECTSOUND3DLISTENER iface,
	LPD3DVECTOR lpvVelocity)
{
	ICOM_THIS(IDirectSound3DListenerImpl,iface);
	TRACE("returning: Velocity vector = (%f,%f,%f)\n", This->ds3dl.vVelocity.u1.x, This->ds3dl.vVelocity.u2.y, This->ds3dl.vVelocity.u3.z);
	*lpvVelocity = This->ds3dl.vVelocity;
	return DS_OK;
}

static HRESULT WINAPI IDirectSound3DListenerImpl_SetAllParameters(
	LPDIRECTSOUND3DLISTENER iface,
	LPCDS3DLISTENER lpcDS3DL,
	DWORD dwApply)
{
	FIXME("stub\n");
	return DS_OK;
}

static HRESULT WINAPI IDirectSound3DListenerImpl_SetDistanceFactor(
	LPDIRECTSOUND3DLISTENER iface,
	D3DVALUE fDistanceFactor,
	DWORD dwApply)
{
	FIXME("stub\n");
	return DS_OK;
}

static HRESULT WINAPI IDirectSound3DListenerImpl_SetDopplerFactor(
	LPDIRECTSOUND3DLISTENER iface,
	D3DVALUE fDopplerFactor,
	DWORD dwApply)
{
	FIXME("stub\n");
	return DS_OK;
}

static HRESULT WINAPI IDirectSound3DListenerImpl_SetOrientation(
	LPDIRECTSOUND3DLISTENER iface,
	D3DVALUE xFront, D3DVALUE yFront, D3DVALUE zFront,
	D3DVALUE xTop, D3DVALUE yTop, D3DVALUE zTop,
	DWORD dwApply)
{
	FIXME("stub\n");
	return DS_OK;
}

static HRESULT WINAPI IDirectSound3DListenerImpl_SetPosition(
	LPDIRECTSOUND3DLISTENER iface,
	D3DVALUE x, D3DVALUE y, D3DVALUE z,
	DWORD dwApply)
{
	FIXME("stub\n");
	return DS_OK;
}

static HRESULT WINAPI IDirectSound3DListenerImpl_SetRolloffFactor(
	LPDIRECTSOUND3DLISTENER iface,
	D3DVALUE fRolloffFactor,
	DWORD dwApply)
{
	FIXME("stub\n");
	return DS_OK;
}

static HRESULT WINAPI IDirectSound3DListenerImpl_SetVelocity(
	LPDIRECTSOUND3DLISTENER iface,
	D3DVALUE x, D3DVALUE y, D3DVALUE z,
	DWORD dwApply)
{
	FIXME("stub\n");
	return DS_OK;
}

static HRESULT WINAPI IDirectSound3DListenerImpl_CommitDeferredSettings(
	LPDIRECTSOUND3DLISTENER iface)

{
	FIXME("stub\n");
	return DS_OK;
}

static ICOM_VTABLE(IDirectSound3DListener) ds3dlvt =
{
	ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
	/* IUnknown methods */
	IDirectSound3DListenerImpl_QueryInterface,
	IDirectSound3DListenerImpl_AddRef,
	IDirectSound3DListenerImpl_Release,
	/* IDirectSound3DListener methods */
	IDirectSound3DListenerImpl_GetAllParameter,
	IDirectSound3DListenerImpl_GetDistanceFactor,
	IDirectSound3DListenerImpl_GetDopplerFactor,
	IDirectSound3DListenerImpl_GetOrientation,
	IDirectSound3DListenerImpl_GetPosition,
	IDirectSound3DListenerImpl_GetRolloffFactor,
	IDirectSound3DListenerImpl_GetVelocity,
	IDirectSound3DListenerImpl_SetAllParameters,
	IDirectSound3DListenerImpl_SetDistanceFactor,
	IDirectSound3DListenerImpl_SetDopplerFactor,
	IDirectSound3DListenerImpl_SetOrientation,
	IDirectSound3DListenerImpl_SetPosition,
	IDirectSound3DListenerImpl_SetRolloffFactor,
	IDirectSound3DListenerImpl_SetVelocity,
	IDirectSound3DListenerImpl_CommitDeferredSettings,
};

HRESULT WINAPI IDirectSound3DListenerImpl_Create(
	PrimaryBufferImpl *This,
	IDirectSound3DListenerImpl **pdsl)
{
	IDirectSound3DListenerImpl *dsl;

	dsl = (IDirectSound3DListenerImpl*)HeapAlloc(GetProcessHeap(),0,sizeof(*dsl));
	dsl->ref = 1;
	ICOM_VTBL(dsl) = &ds3dlvt;

	dsl->ds3dl.dwSize = sizeof(DS3DLISTENER);
	dsl->ds3dl.vPosition.u1.x = 0.0;
	dsl->ds3dl.vPosition.u2.y = 0.0;
	dsl->ds3dl.vPosition.u3.z = 0.0;
	dsl->ds3dl.vVelocity.u1.x = 0.0;
	dsl->ds3dl.vVelocity.u2.y = 0.0;
	dsl->ds3dl.vVelocity.u3.z = 0.0;
	dsl->ds3dl.vOrientFront.u1.x = 0.0;
	dsl->ds3dl.vOrientFront.u2.y = 0.0;
	dsl->ds3dl.vOrientFront.u3.z = 1.0;
	dsl->ds3dl.vOrientTop.u1.x = 0.0;
	dsl->ds3dl.vOrientTop.u2.y = 1.0;
	dsl->ds3dl.vOrientTop.u3.z = 0.0;
	dsl->ds3dl.flDistanceFactor = DS3D_DEFAULTDISTANCEFACTOR;
	dsl->ds3dl.flRolloffFactor = DS3D_DEFAULTROLLOFFFACTOR;

	InitializeCriticalSection(&dsl->lock);

	dsl->dsb = This;
	IDirectSoundBuffer8_AddRef((LPDIRECTSOUNDBUFFER8)This);

	*pdsl = dsl;
	return S_OK;
}