dlls/msacm32/driver.c - wine - Git at Google

 /* -*- tab-width: 8; c-basic-offset: 4 -*- */

 /*
  *      MSACM32 library
  *
  *      Copyright 1998  Patrik Stridvall
  *		  1999	Eric Pouech
  */

 #include "winbase.h"
 #include "winerror.h"
 #include "windef.h"
 #include "winuser.h"
 #include "debugtools.h"
 #include "driver.h"
 #include "heap.h"
 #include "mmsystem.h"
 #include "msacm.h"
 #include "msacmdrv.h"
 #include "wineacm.h"
 #include "winreg.h"

 DEFAULT_DEBUG_CHANNEL(msacm)

 /***********************************************************************
  *           acmDriverAddA (MSACM32.2)
  */
 MMRESULT WINAPI acmDriverAddA(PHACMDRIVERID phadid, HINSTANCE hinstModule,
 			      LPARAM lParam, DWORD dwPriority, DWORD fdwAdd)
 {
     if (!phadid)
 	return MMSYSERR_INVALPARAM;

     /* Check if any unknown flags */
     if (fdwAdd &
 	~(ACM_DRIVERADDF_FUNCTION|ACM_DRIVERADDF_NOTIFYHWND|
 	  ACM_DRIVERADDF_GLOBAL))
 	return MMSYSERR_INVALFLAG;

     /* Check if any incompatible flags */
     if ((fdwAdd & ACM_DRIVERADDF_FUNCTION) &&
 	(fdwAdd & ACM_DRIVERADDF_NOTIFYHWND))
 	return MMSYSERR_INVALFLAG;

     /* FIXME: in fact, should GetModuleFileName(hinstModule) and do a
      * LoadDriver on it, to be sure we can call SendDriverMessage on the
      * hDrvr handle.
      */
     *phadid = (HACMDRIVERID) MSACM_RegisterDriver(NULL, NULL, hinstModule);

     /* FIXME: lParam, dwPriority and fdwAdd ignored */

     return MMSYSERR_NOERROR;
 }

 /***********************************************************************
  *           acmDriverAddW (MSACM32.3)
  * FIXME
  *   Not implemented
  */
 MMRESULT WINAPI acmDriverAddW(PHACMDRIVERID phadid, HINSTANCE hinstModule,
 			      LPARAM lParam, DWORD dwPriority, DWORD fdwAdd)
 {
     FIXME("(%p, 0x%08x, %ld, %ld, %ld): stub\n",
 	  phadid, hinstModule, lParam, dwPriority, fdwAdd);

     SetLastError(ERROR_CALL_NOT_IMPLEMENTED);
     return MMSYSERR_ERROR;
 }

 /***********************************************************************
  *           acmDriverClose (MSACM32.4)
  */
 MMRESULT WINAPI acmDriverClose(HACMDRIVER had, DWORD fdwClose)
 {
     PWINE_ACMDRIVER  p;
     PWINE_ACMDRIVER* tp;

     if (fdwClose)
 	return MMSYSERR_INVALFLAG;

     p = MSACM_GetDriver(had);
     if (!p)
 	return MMSYSERR_INVALHANDLE;

     for (tp = &(p->obj.pACMDriverID->pACMDriverList); *tp; *tp = (*tp)->pNextACMDriver) {
 	if (*tp == p) {
 	    *tp = (*tp)->pNextACMDriver;
 	    break;
 	}
     }

     if (p->hDrvr && !p->obj.pACMDriverID->pACMDriverList)
 	CloseDriver(p->hDrvr, 0, 0);

     HeapFree(MSACM_hHeap, 0, p);

     return MMSYSERR_NOERROR;
 }

 /***********************************************************************
  *           acmDriverDetailsA (MSACM32.5)
  */
 MMRESULT WINAPI acmDriverDetailsA(HACMDRIVERID hadid, PACMDRIVERDETAILSA padd, DWORD fdwDetails)
 {
     MMRESULT mmr;
     ACMDRIVERDETAILSW	addw;

     addw.cbStruct = sizeof(addw);
     mmr = acmDriverDetailsW(hadid, &addw, fdwDetails);
     if (mmr == 0) {
 	padd->fccType = addw.fccType;
 	padd->fccComp = addw.fccComp;
 	padd->wMid = addw.wMid;
 	padd->wPid = addw.wPid;
 	padd->vdwACM = addw.vdwACM;
 	padd->vdwDriver = addw.vdwDriver;
 	padd->fdwSupport = addw.fdwSupport;
 	padd->cFormatTags = addw.cFormatTags;
 	padd->cFilterTags = addw.cFilterTags;
 	padd->hicon = addw.hicon;
 	lstrcpyWtoA(padd->szShortName, addw.szShortName);
 	lstrcpyWtoA(padd->szLongName, addw.szLongName);
 	lstrcpyWtoA(padd->szCopyright, addw.szCopyright);
 	lstrcpyWtoA(padd->szLicensing, addw.szLicensing);
 	lstrcpyWtoA(padd->szFeatures, addw.szFeatures);
     }
     return mmr;
 }

 /***********************************************************************
  *           acmDriverDetailsW (MSACM32.6)
  */
 MMRESULT WINAPI acmDriverDetailsW(HACMDRIVERID hadid, PACMDRIVERDETAILSW padd, DWORD fdwDetails)
 {
     HACMDRIVER acmDrvr;
     MMRESULT mmr;

     if (fdwDetails)
 	return MMSYSERR_INVALFLAG;

     mmr = acmDriverOpen(&acmDrvr, hadid, 0);
     if (mmr == 0) {
 	mmr = (MMRESULT)acmDriverMessage(acmDrvr, ACMDM_DRIVER_DETAILS, (LPARAM) padd,  0);

 	acmDriverClose(acmDrvr, 0);
     }

     return mmr;
 }

 /***********************************************************************
  *           acmDriverEnum (MSACM32.7)
  */
 MMRESULT WINAPI acmDriverEnum(ACMDRIVERENUMCB fnCallback, DWORD dwInstance, DWORD fdwEnum)
 {
     PWINE_ACMDRIVERID	p;
     DWORD		fdwSupport;

     if (!fnCallback) {
 	return MMSYSERR_INVALPARAM;
     }

     if (fdwEnum && ~(ACM_DRIVERENUMF_NOLOCAL|ACM_DRIVERENUMF_DISABLED)) {
 	return MMSYSERR_INVALFLAG;
     }

     for (p = MSACM_pFirstACMDriverID; p; p = p->pNextACMDriverID) {
 	fdwSupport = ACMDRIVERDETAILS_SUPPORTF_CODEC;
 	if (!p->bEnabled) {
 	    if (fdwEnum & ACM_DRIVERENUMF_DISABLED)
 		fdwSupport |= ACMDRIVERDETAILS_SUPPORTF_DISABLED;
 	    else
 		continue;
 	}
 	(*fnCallback)((HACMDRIVERID) p, dwInstance, fdwSupport);
     }

     return MMSYSERR_NOERROR;
 }

 /***********************************************************************
  *           acmDriverID (MSACM32.8)
  */
 MMRESULT WINAPI acmDriverID(HACMOBJ hao, PHACMDRIVERID phadid, DWORD fdwDriverID)
 {
     PWINE_ACMOBJ pao;

     pao = MSACM_GetObj(hao);
     if (!pao)
 	return MMSYSERR_INVALHANDLE;

     if (!phadid)
 	return MMSYSERR_INVALPARAM;

     if (fdwDriverID)
 	return MMSYSERR_INVALFLAG;

     *phadid = (HACMDRIVERID) pao->pACMDriverID;

     return MMSYSERR_NOERROR;
 }

 /***********************************************************************
  *           acmDriverMessage (MSACM32.9)
  * FIXME
  *   Not implemented
  */
 LRESULT WINAPI acmDriverMessage(HACMDRIVER had, UINT uMsg, LPARAM lParam1, LPARAM lParam2)
 {
     PWINE_ACMDRIVER pad = MSACM_GetDriver(had);
     if (!pad)
 	return MMSYSERR_INVALPARAM;

     /* FIXME: Check if uMsg legal */

     if (!SendDriverMessage(pad->hDrvr, uMsg, lParam1, lParam2))
 	return MMSYSERR_NOTSUPPORTED;

     return MMSYSERR_NOERROR;
 }


 /***********************************************************************
  *           acmDriverOpen (MSACM32.10)
  */
 MMRESULT WINAPI acmDriverOpen(PHACMDRIVER phad, HACMDRIVERID hadid, DWORD fdwOpen)
 {
     PWINE_ACMDRIVERID	padid;
     PWINE_ACMDRIVER	pad;

     TRACE("(%p, %x, %08lu)\n", phad, hadid, fdwOpen);

     if (!phad)
 	return MMSYSERR_INVALPARAM;

     padid = MSACM_GetDriverID(hadid);
     if (!padid)
 	return MMSYSERR_INVALHANDLE;

     if (fdwOpen)
 	return MMSYSERR_INVALFLAG;

     pad = HeapAlloc(MSACM_hHeap, 0, sizeof(WINE_ACMDRIVER));
     if (!pad) return MMSYSERR_NOMEM;

     pad->obj.pACMDriverID = padid;

     if (!padid->hInstModule)
 	pad->hDrvr = OpenDriverA(padid->pszDriverAlias, "drivers32", 0);
     else
 	pad->hDrvr = padid->hInstModule;

     if (!pad->hDrvr) {
 	HeapFree(MSACM_hHeap, 0, pad);
 	return MMSYSERR_ERROR;
     }

     pad->pfnDriverProc = GetProcAddress(pad->hDrvr, "DriverProc");

     /* insert new pad at beg of list */
     pad->pNextACMDriver = padid->pACMDriverList;
     padid->pACMDriverList = pad;

     /* FIXME: Create a WINE_ACMDRIVER32 */
     *phad = (HACMDRIVER)pad;

     return MMSYSERR_NOERROR;
 }

 /***********************************************************************
  *           acmDriverPriority (MSACM32.11)
  */
 MMRESULT WINAPI acmDriverPriority(HACMDRIVERID hadid, DWORD dwPriority, DWORD fdwPriority)
 {
     PWINE_ACMDRIVERID padid;
     CHAR szSubKey[17];
     CHAR szBuffer[256];
     LONG lBufferLength = sizeof(szBuffer);
     LONG lError;
     HKEY hPriorityKey;
     DWORD dwPriorityCounter;

     padid = MSACM_GetDriverID(hadid);
     if (!padid)
 	return MMSYSERR_INVALHANDLE;

     /* Check for unknown flags */
     if (fdwPriority &
 	~(ACM_DRIVERPRIORITYF_ENABLE|ACM_DRIVERPRIORITYF_DISABLE|
 	  ACM_DRIVERPRIORITYF_BEGIN|ACM_DRIVERPRIORITYF_END))
 	return MMSYSERR_INVALFLAG;

     /* Check for incompatible flags */
     if ((fdwPriority & ACM_DRIVERPRIORITYF_ENABLE) &&
 	(fdwPriority & ACM_DRIVERPRIORITYF_DISABLE))
 	return MMSYSERR_INVALFLAG;

     /* Check for incompatible flags */
     if ((fdwPriority & ACM_DRIVERPRIORITYF_BEGIN) &&
 	(fdwPriority & ACM_DRIVERPRIORITYF_END))
 	return MMSYSERR_INVALFLAG;

     lError = RegOpenKeyA(HKEY_CURRENT_USER,
 			 "Software\\Microsoft\\Multimedia\\"
 			 "Audio Compression Manager\\Priority v4.00",
 			 &hPriorityKey
 			 );
     /* FIXME: Create key */
     if (lError != ERROR_SUCCESS)
 	return MMSYSERR_ERROR;

     for (dwPriorityCounter = 1; ; dwPriorityCounter++)	{
 	wsnprintfA(szSubKey, 17, "Priorty%ld", dwPriorityCounter);
 	lError = RegQueryValueA(hPriorityKey, szSubKey, szBuffer, &lBufferLength);
 	if (lError != ERROR_SUCCESS)
 	    break;

 	FIXME("(0x%08x, %ld, %ld): stub (partial)\n",
 	      hadid, dwPriority, fdwPriority);
 	break;
     }

     RegCloseKey(hPriorityKey);

     return MMSYSERR_ERROR;
 }

 /***********************************************************************
  *           acmDriverRemove (MSACM32.12)
  */
 MMRESULT WINAPI acmDriverRemove(HACMDRIVERID hadid, DWORD fdwRemove)
 {
     PWINE_ACMDRIVERID padid;

     padid = MSACM_GetDriverID(hadid);
     if (!padid)
 	return MMSYSERR_INVALHANDLE;

     if (fdwRemove)
 	return MMSYSERR_INVALFLAG;

     MSACM_UnregisterDriver(padid);

     return MMSYSERR_NOERROR;
 }
	/* -- tab-width: 8; c-basic-offset: 4 -- */

	/*
	* MSACM32 library
	*
	* Copyright 1998 Patrik Stridvall
	* 1999 Eric Pouech
	*/

	#include "winbase.h"
	#include "winerror.h"
	#include "windef.h"
	#include "winuser.h"
	#include "debugtools.h"
	#include "driver.h"
	#include "heap.h"
	#include "mmsystem.h"
	#include "msacm.h"
	#include "msacmdrv.h"
	#include "wineacm.h"
	#include "winreg.h"

	DEFAULT_DEBUG_CHANNEL(msacm)

	/***********************************************************************
	* acmDriverAddA (MSACM32.2)
	*/
	MMRESULT WINAPI acmDriverAddA(PHACMDRIVERID phadid, HINSTANCE hinstModule,
	LPARAM lParam, DWORD dwPriority, DWORD fdwAdd)
	{
	if (!phadid)
	return MMSYSERR_INVALPARAM;

	/* Check if any unknown flags */
	if (fdwAdd &
	~(ACM_DRIVERADDF_FUNCTION\|ACM_DRIVERADDF_NOTIFYHWND\|
	ACM_DRIVERADDF_GLOBAL))
	return MMSYSERR_INVALFLAG;

	/* Check if any incompatible flags */
	if ((fdwAdd & ACM_DRIVERADDF_FUNCTION) &&
	(fdwAdd & ACM_DRIVERADDF_NOTIFYHWND))
	return MMSYSERR_INVALFLAG;

	/* FIXME: in fact, should GetModuleFileName(hinstModule) and do a
	* LoadDriver on it, to be sure we can call SendDriverMessage on the
	* hDrvr handle.
	*/
	*phadid = (HACMDRIVERID) MSACM_RegisterDriver(NULL, NULL, hinstModule);

	/* FIXME: lParam, dwPriority and fdwAdd ignored */

	return MMSYSERR_NOERROR;
	}

	/***********************************************************************
	* acmDriverAddW (MSACM32.3)
	* FIXME
	* Not implemented
	*/
	MMRESULT WINAPI acmDriverAddW(PHACMDRIVERID phadid, HINSTANCE hinstModule,
	LPARAM lParam, DWORD dwPriority, DWORD fdwAdd)
	{
	FIXME("(%p, 0x%08x, %ld, %ld, %ld): stub\n",
	phadid, hinstModule, lParam, dwPriority, fdwAdd);

	SetLastError(ERROR_CALL_NOT_IMPLEMENTED);
	return MMSYSERR_ERROR;
	}

	/***********************************************************************
	* acmDriverClose (MSACM32.4)
	*/
	MMRESULT WINAPI acmDriverClose(HACMDRIVER had, DWORD fdwClose)
	{
	PWINE_ACMDRIVER p;
	PWINE_ACMDRIVER* tp;

	if (fdwClose)
	return MMSYSERR_INVALFLAG;

	p = MSACM_GetDriver(had);
	if (!p)
	return MMSYSERR_INVALHANDLE;

	for (tp = &(p->obj.pACMDriverID->pACMDriverList); tp; tp = (*tp)->pNextACMDriver) {
	if (*tp == p) {
	tp = (tp)->pNextACMDriver;
	break;
	}
	}

	if (p->hDrvr && !p->obj.pACMDriverID->pACMDriverList)
	CloseDriver(p->hDrvr, 0, 0);

	HeapFree(MSACM_hHeap, 0, p);

	return MMSYSERR_NOERROR;
	}

	/***********************************************************************
	* acmDriverDetailsA (MSACM32.5)
	*/
	MMRESULT WINAPI acmDriverDetailsA(HACMDRIVERID hadid, PACMDRIVERDETAILSA padd, DWORD fdwDetails)
	{
	MMRESULT mmr;
	ACMDRIVERDETAILSW addw;

	addw.cbStruct = sizeof(addw);
	mmr = acmDriverDetailsW(hadid, &addw, fdwDetails);
	if (mmr == 0) {
	padd->fccType = addw.fccType;
	padd->fccComp = addw.fccComp;
	padd->wMid = addw.wMid;
	padd->wPid = addw.wPid;
	padd->vdwACM = addw.vdwACM;
	padd->vdwDriver = addw.vdwDriver;
	padd->fdwSupport = addw.fdwSupport;
	padd->cFormatTags = addw.cFormatTags;
	padd->cFilterTags = addw.cFilterTags;
	padd->hicon = addw.hicon;
	lstrcpyWtoA(padd->szShortName, addw.szShortName);
	lstrcpyWtoA(padd->szLongName, addw.szLongName);
	lstrcpyWtoA(padd->szCopyright, addw.szCopyright);
	lstrcpyWtoA(padd->szLicensing, addw.szLicensing);
	lstrcpyWtoA(padd->szFeatures, addw.szFeatures);
	}
	return mmr;
	}

	/***********************************************************************
	* acmDriverDetailsW (MSACM32.6)
	*/
	MMRESULT WINAPI acmDriverDetailsW(HACMDRIVERID hadid, PACMDRIVERDETAILSW padd, DWORD fdwDetails)
	{
	HACMDRIVER acmDrvr;
	MMRESULT mmr;

	if (fdwDetails)
	return MMSYSERR_INVALFLAG;

	mmr = acmDriverOpen(&acmDrvr, hadid, 0);
	if (mmr == 0) {
	mmr = (MMRESULT)acmDriverMessage(acmDrvr, ACMDM_DRIVER_DETAILS, (LPARAM) padd, 0);

	acmDriverClose(acmDrvr, 0);
	}

	return mmr;
	}

	/***********************************************************************
	* acmDriverEnum (MSACM32.7)
	*/
	MMRESULT WINAPI acmDriverEnum(ACMDRIVERENUMCB fnCallback, DWORD dwInstance, DWORD fdwEnum)
	{
	PWINE_ACMDRIVERID p;
	DWORD fdwSupport;

	if (!fnCallback) {
	return MMSYSERR_INVALPARAM;
	}

	if (fdwEnum && ~(ACM_DRIVERENUMF_NOLOCAL\|ACM_DRIVERENUMF_DISABLED)) {
	return MMSYSERR_INVALFLAG;
	}

	for (p = MSACM_pFirstACMDriverID; p; p = p->pNextACMDriverID) {
	fdwSupport = ACMDRIVERDETAILS_SUPPORTF_CODEC;
	if (!p->bEnabled) {
	if (fdwEnum & ACM_DRIVERENUMF_DISABLED)
	fdwSupport \|= ACMDRIVERDETAILS_SUPPORTF_DISABLED;
	else
	continue;
	}
	(*fnCallback)((HACMDRIVERID) p, dwInstance, fdwSupport);
	}

	return MMSYSERR_NOERROR;
	}

	/***********************************************************************
	* acmDriverID (MSACM32.8)
	*/
	MMRESULT WINAPI acmDriverID(HACMOBJ hao, PHACMDRIVERID phadid, DWORD fdwDriverID)
	{
	PWINE_ACMOBJ pao;

	pao = MSACM_GetObj(hao);
	if (!pao)
	return MMSYSERR_INVALHANDLE;

	if (!phadid)
	return MMSYSERR_INVALPARAM;

	if (fdwDriverID)
	return MMSYSERR_INVALFLAG;

	*phadid = (HACMDRIVERID) pao->pACMDriverID;

	return MMSYSERR_NOERROR;
	}

	/***********************************************************************
	* acmDriverMessage (MSACM32.9)
	* FIXME
	* Not implemented
	*/
	LRESULT WINAPI acmDriverMessage(HACMDRIVER had, UINT uMsg, LPARAM lParam1, LPARAM lParam2)
	{
	PWINE_ACMDRIVER pad = MSACM_GetDriver(had);
	if (!pad)
	return MMSYSERR_INVALPARAM;

	/* FIXME: Check if uMsg legal */

	if (!SendDriverMessage(pad->hDrvr, uMsg, lParam1, lParam2))
	return MMSYSERR_NOTSUPPORTED;

	return MMSYSERR_NOERROR;
	}


	/***********************************************************************
	* acmDriverOpen (MSACM32.10)
	*/
	MMRESULT WINAPI acmDriverOpen(PHACMDRIVER phad, HACMDRIVERID hadid, DWORD fdwOpen)
	{
	PWINE_ACMDRIVERID padid;
	PWINE_ACMDRIVER pad;

	TRACE("(%p, %x, %08lu)\n", phad, hadid, fdwOpen);

	if (!phad)
	return MMSYSERR_INVALPARAM;

	padid = MSACM_GetDriverID(hadid);
	if (!padid)
	return MMSYSERR_INVALHANDLE;

	if (fdwOpen)
	return MMSYSERR_INVALFLAG;

	pad = HeapAlloc(MSACM_hHeap, 0, sizeof(WINE_ACMDRIVER));
	if (!pad) return MMSYSERR_NOMEM;

	pad->obj.pACMDriverID = padid;

	if (!padid->hInstModule)
	pad->hDrvr = OpenDriverA(padid->pszDriverAlias, "drivers32", 0);
	else
	pad->hDrvr = padid->hInstModule;

	if (!pad->hDrvr) {
	HeapFree(MSACM_hHeap, 0, pad);
	return MMSYSERR_ERROR;
	}

	pad->pfnDriverProc = GetProcAddress(pad->hDrvr, "DriverProc");

	/* insert new pad at beg of list */
	pad->pNextACMDriver = padid->pACMDriverList;
	padid->pACMDriverList = pad;

	/* FIXME: Create a WINE_ACMDRIVER32 */
	*phad = (HACMDRIVER)pad;

	return MMSYSERR_NOERROR;
	}

	/***********************************************************************
	* acmDriverPriority (MSACM32.11)
	*/
	MMRESULT WINAPI acmDriverPriority(HACMDRIVERID hadid, DWORD dwPriority, DWORD fdwPriority)
	{
	PWINE_ACMDRIVERID padid;
	CHAR szSubKey[17];
	CHAR szBuffer[256];
	LONG lBufferLength = sizeof(szBuffer);
	LONG lError;
	HKEY hPriorityKey;
	DWORD dwPriorityCounter;

	padid = MSACM_GetDriverID(hadid);
	if (!padid)
	return MMSYSERR_INVALHANDLE;

	/* Check for unknown flags */
	if (fdwPriority &
	~(ACM_DRIVERPRIORITYF_ENABLE\|ACM_DRIVERPRIORITYF_DISABLE\|
	ACM_DRIVERPRIORITYF_BEGIN\|ACM_DRIVERPRIORITYF_END))
	return MMSYSERR_INVALFLAG;

	/* Check for incompatible flags */
	if ((fdwPriority & ACM_DRIVERPRIORITYF_ENABLE) &&
	(fdwPriority & ACM_DRIVERPRIORITYF_DISABLE))
	return MMSYSERR_INVALFLAG;

	/* Check for incompatible flags */
	if ((fdwPriority & ACM_DRIVERPRIORITYF_BEGIN) &&
	(fdwPriority & ACM_DRIVERPRIORITYF_END))
	return MMSYSERR_INVALFLAG;

	lError = RegOpenKeyA(HKEY_CURRENT_USER,
	"Software\\Microsoft\\Multimedia\\"
	"Audio Compression Manager\\Priority v4.00",
	&hPriorityKey
	);
	/* FIXME: Create key */
	if (lError != ERROR_SUCCESS)
	return MMSYSERR_ERROR;

	for (dwPriorityCounter = 1; ; dwPriorityCounter++) {
	wsnprintfA(szSubKey, 17, "Priorty%ld", dwPriorityCounter);
	lError = RegQueryValueA(hPriorityKey, szSubKey, szBuffer, &lBufferLength);
	if (lError != ERROR_SUCCESS)
	break;

	FIXME("(0x%08x, %ld, %ld): stub (partial)\n",
	hadid, dwPriority, fdwPriority);
	break;
	}

	RegCloseKey(hPriorityKey);

	return MMSYSERR_ERROR;
	}

	/***********************************************************************
	* acmDriverRemove (MSACM32.12)
	*/
	MMRESULT WINAPI acmDriverRemove(HACMDRIVERID hadid, DWORD fdwRemove)
	{
	PWINE_ACMDRIVERID padid;

	padid = MSACM_GetDriverID(hadid);
	if (!padid)
	return MMSYSERR_INVALHANDLE;

	if (fdwRemove)
	return MMSYSERR_INVALFLAG;

	MSACM_UnregisterDriver(padid);

	return MMSYSERR_NOERROR;
	}