dlls/dmloader/loader.c - wine - Git at Google

 /* IDirectMusicLoader8 Implementation
  *
  * Copyright (C) 2003 Rok Mandeljc
  *
  * This program is free software; you can redistribute it and/or modify
  * it under the terms of the GNU General Public License as published by
  * the Free Software Foundation; either version 2 of the License, or
  * (at your option) any later version.
  *
  * This program 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 Library General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
  * along with this program; if not, write to the Free Software
  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
  */

 #include "windef.h"
 #include "winbase.h"
 #include "winuser.h"
 #include "wingdi.h"
 #include "wine/debug.h"
 #include "wine/unicode.h"
 #include "winreg.h"

 #include "dmloader_private.h"

 WINE_DEFAULT_DEBUG_CHANNEL(dmloader);

 HRESULT WINAPI DMUSIC_GetDefaultGMPath (WCHAR wszPath[MAX_PATH]);

 /* IDirectMusicLoader8 IUnknown part: */
 HRESULT WINAPI IDirectMusicLoader8Impl_QueryInterface (LPDIRECTMUSICLOADER8 iface, REFIID riid, LPVOID *ppobj)
 {
 	ICOM_THIS(IDirectMusicLoader8Impl,iface);

 	if (IsEqualIID (riid, &IID_IUnknown) ||
 	    IsEqualIID (riid, &IID_IDirectMusicLoader) ||
 	    IsEqualIID (riid, &IID_IDirectMusicLoader8)) {
 		IDirectMusicLoader8Impl_AddRef(iface);
 		*ppobj = This;
 		return S_OK;
 	}

 	WARN("(%p)->(%s,%p),not found\n",This,debugstr_guid(riid),ppobj);
 	return E_NOINTERFACE;
 }

 ULONG WINAPI IDirectMusicLoader8Impl_AddRef (LPDIRECTMUSICLOADER8 iface)
 {
 	ICOM_THIS(IDirectMusicLoader8Impl,iface);
 	TRACE("(%p) : AddRef from %ld\n", This, This->ref);
 	return ++(This->ref);
 }

 ULONG WINAPI IDirectMusicLoader8Impl_Release (LPDIRECTMUSICLOADER8 iface)
 {
 	ICOM_THIS(IDirectMusicLoader8Impl,iface);
 	ULONG ref = --This->ref;
 	TRACE("(%p) : ReleaseRef to %ld\n", This, This->ref);
 	if (ref == 0) {
 		HeapFree(GetProcessHeap(), 0, This);
 	}
 	return ref;
 }

 /* IDirectMusicLoader8 IDirectMusicLoader part: */
 HRESULT WINAPI IDirectMusicLoader8Impl_GetObject (LPDIRECTMUSICLOADER8 iface, LPDMUS_OBJECTDESC pDesc, REFIID riid, LPVOID* ppv)
 {
 	IDirectMusicObject* pObject;
 	DMUS_OBJECTDESC desc;
 	ICOM_THIS(IDirectMusicLoader8Impl,iface);
 	int i;
 	HRESULT result;

 	TRACE("(%p, %p, %s, %p)\n", This, pDesc, debugstr_guid(riid), ppv);
 	TRACE(": looking up cache");
 	/* first, check if requested object is already in cache (check by name and GUID) */
 	for (i = 0; i < This->dwCacheSize; i++) {
 		if (pDesc->dwValidData & DMUS_OBJ_OBJECT) {
 			if (IsEqualGUID (&pDesc->guidObject, &This->pCache[i].guidObject)) {
 				TRACE(": object already exist in cache (found by GUID)\n");
 				if (This->pCache[i].pObject) {
 					return IDirectMusicObject_QueryInterface (This->pCache[i].pObject, riid, ppv);
 				}
 			}
 		} else if (pDesc->dwValidData & DMUS_OBJ_FILENAME) {
 			if (This->pCache[i].pwzFileName && !strncmpW(pDesc->wszFileName, This->pCache[i].pwzFileName, MAX_PATH)) {
 				TRACE(": object already exist in cache (found by file name)\n");
 				if (This->pCache[i].pObject) {
 					return IDirectMusicObject_QueryInterface (This->pCache[i].pObject, riid, ppv);
 				}
 			}
 		}
 	}

 	/* object doesn't exist in cache... guess we'll have to load it */
 	TRACE(": object does not exist in cache\n");
 	result = CoCreateInstance (&pDesc->guidClass, NULL, CLSCTX_INPROC_SERVER, &IID_IDirectMusicObject, (LPVOID*)&pObject);
 	if (FAILED(result)) return result;
 	if (pDesc->dwValidData & DMUS_OBJ_FILENAME) {
 		/* load object from file */
 		WCHAR wzFileName[MAX_PATH];
 		ILoaderStream* pStream;
         IPersistStream *pPersistStream = NULL;
 		/* if it's full path, don't add search directory path, otherwise do */
 		if (pDesc->dwValidData & DMUS_OBJ_FULLPATH) {
                     lstrcpyW( wzFileName, pDesc->wszFileName );
 		} else {
                     WCHAR *p;
                     lstrcpyW( wzFileName, This->wzSearchPath );
                     p = wzFileName + lstrlenW(wzFileName);
                     if (p > wzFileName && p[-1] != '\\') *p++ = '\\';
                     lstrcpyW( p, pDesc->wszFileName );
 		}
 		TRACE(": loading from file (%s)\n", debugstr_w(wzFileName));

 		result = DMUSIC_CreateLoaderStream ((LPSTREAM*)&pStream);
 		if (FAILED(result)) return result;

 		result = ILoaderStream_Attach (pStream, wzFileName, (LPDIRECTMUSICLOADER)iface);
 		if (FAILED(result)) return result;

 		result = IDirectMusicObject_QueryInterface (pObject, &IID_IPersistStream, (LPVOID*)&pPersistStream);
         if (FAILED(result)) return result;

 		result = IPersistStream_Load (pPersistStream, (LPSTREAM)pStream);
         if (FAILED(result)) return result;

         ILoaderStream_IStream_Release ((LPSTREAM)pStream);
         IPersistStream_Release (pPersistStream);
 	} else if (pDesc->dwValidData & DMUS_OBJ_STREAM) {
 		/* load object from stream */
 		IStream* pClonedStream = NULL;
 		IPersistStream* pPersistStream = NULL;

 		TRACE(": loading from stream\n");
 		result = IDirectMusicObject_QueryInterface (pObject, &IID_IPersistStream, (LPVOID*)&pPersistStream);
         if (FAILED(result)) {
 			TRACE("couln\'t get IPersistStream\n");
 			return result;
 		}

         result = IStream_Clone (pDesc->pStream, &pClonedStream);
         if (FAILED(result)) {
 			TRACE("failed to clone\n");
 			return result;
 		}

         result = IPersistStream_Load (pPersistStream, pClonedStream);
         if (FAILED(result)) {
 			TRACE("failed to load\n");
 			return result;
 		}

 		IPersistStream_Release (pPersistStream);
 		IStream_Release (pClonedStream);
 	} else if (pDesc->dwValidData & DMUS_OBJ_OBJECT) {
 		/* load object by GUID */
 		TRACE(": loading by GUID (only default DLS supported)\n");
 		if (IsEqualGUID (&pDesc->guidObject, &GUID_DefaultGMCollection)) {
 			/* great idea: let's just change dwValid and wszFileName fields and then call ourselves again :D */
 			pDesc->dwValidData = DMUS_OBJ_FILENAME | DMUS_OBJ_FULLPATH;
 			if (FAILED(DMUSIC_GetDefaultGMPath (pDesc->wszFileName)))
 				return E_FAIL;
 			return IDirectMusicLoader8Impl_GetObject (iface, pDesc, riid, ppv);
 		} else {
 			return E_FAIL;
 		}
 	} else {
 		/* nowhere to load from */
 		FIXME(": unknown/unsupported way of loading\n");
 		return E_FAIL;
 	}

 	memset((LPVOID)&desc, 0, sizeof(desc));
 	desc.dwSize = sizeof (DMUS_OBJECTDESC);
 	IDirectMusicObject_GetDescriptor (pObject, &desc);

 	/* tests with native dlls show that descriptor, which is recieved by GetDescriptor doesn't contain filepath
 	   therefore we must copy it from input description	*/
 	if (pDesc->dwValidData & DMUS_OBJ_FILENAME || desc.dwValidData & DMUS_OBJ_OBJECT) {
 		DMUS_PRIVATE_CACHE_ENTRY CacheEntry;
 		This->dwCacheSize++; /* increase size of cache for one entry */
 		This->pCache = HeapReAlloc (GetProcessHeap (), 0, This->pCache, sizeof(DMUS_PRIVATE_CACHE_ENTRY) * This->dwCacheSize);
 		if (desc.dwValidData & DMUS_OBJ_OBJECT)
 			CacheEntry.guidObject = desc.guidObject;
 		if (pDesc->dwValidData & DMUS_OBJ_FILENAME)
 			strncpyW (CacheEntry.pwzFileName, pDesc->wszFileName, MAX_PATH);
 		CacheEntry.pObject = pObject;
 		IDirectMusicObject_AddRef (pObject); /* MSDN says that we should */
 		This->pCache[This->dwCacheSize - 1] = CacheEntry; /* fill in one backward, as list is zero based */
 		TRACE(": filled in cache entry\n");
 	}

 	TRACE(": nr. of entries = %ld\n", This->dwCacheSize);
 	for (i = 0; i < This->dwCacheSize; i++) {
 		TRACE(": cache entry [%i]: GUID = %s, file name = %s, object = %p\n", i, debugstr_guid(&This->pCache[i].guidObject), debugstr_w(This->pCache[i].pwzFileName), This->pCache[i].pObject);
 	}

 	return IDirectMusicObject_QueryInterface (pObject, riid, ppv);
 }

 HRESULT WINAPI IDirectMusicLoader8Impl_SetObject (LPDIRECTMUSICLOADER8 iface, LPDMUS_OBJECTDESC pDesc)
 {
 	ICOM_THIS(IDirectMusicLoader8Impl,iface);

 	FIXME("(%p, %p): stub\n", This, pDesc);

 	return S_OK;
 }

 HRESULT WINAPI IDirectMusicLoader8Impl_SetSearchDirectory (LPDIRECTMUSICLOADER8 iface, REFGUID rguidClass, WCHAR* pwzPath, BOOL fClear)
 {
 	ICOM_THIS(IDirectMusicLoader8Impl,iface);

 	TRACE("(%p, %s, %p, %d)\n", This, debugstr_guid(rguidClass), pwzPath, fClear);
 	if (0 == strncmpW(This->wzSearchPath, pwzPath, MAX_PATH)) {
 	  return S_FALSE;
 	}
 	strncpyW(This->wzSearchPath, pwzPath, MAX_PATH);

 	return S_OK;
 }

 HRESULT WINAPI IDirectMusicLoader8Impl_ScanDirectory (LPDIRECTMUSICLOADER8 iface, REFGUID rguidClass, WCHAR* pwzFileExtension, WCHAR* pwzScanFileName)
 {
 	ICOM_THIS(IDirectMusicLoader8Impl,iface);

 	FIXME("(%p, %s, %p, %p): stub\n", This, debugstr_guid(rguidClass), pwzFileExtension, pwzScanFileName);

 	return S_OK;
 }

 HRESULT WINAPI IDirectMusicLoader8Impl_CacheObject (LPDIRECTMUSICLOADER8 iface, IDirectMusicObject* pObject)
 {
 	ICOM_THIS(IDirectMusicLoader8Impl,iface);

 	FIXME("(%p, %p): stub\n", This, pObject);

 	return S_OK;
 }

 HRESULT WINAPI IDirectMusicLoader8Impl_ReleaseObject (LPDIRECTMUSICLOADER8 iface, IDirectMusicObject* pObject)
 {
 	ICOM_THIS(IDirectMusicLoader8Impl,iface);

 	FIXME("(%p, %p): stub\n", This, pObject);

 	return S_OK;
 }

 HRESULT WINAPI IDirectMusicLoader8Impl_ClearCache (LPDIRECTMUSICLOADER8 iface, REFGUID rguidClass)
 {
 	ICOM_THIS(IDirectMusicLoader8Impl,iface);

 	FIXME("(%p, %s): stub\n", This, debugstr_guid(rguidClass));

 	return S_OK;
 }

 HRESULT WINAPI IDirectMusicLoader8Impl_EnableCache (LPDIRECTMUSICLOADER8 iface, REFGUID rguidClass, BOOL fEnable)
 {
 	ICOM_THIS(IDirectMusicLoader8Impl,iface);

 	FIXME("(%p, %s, %d): stub\n", This, debugstr_guid(rguidClass), fEnable);

 	return S_OK;
 }

 HRESULT WINAPI IDirectMusicLoader8Impl_EnumObject (LPDIRECTMUSICLOADER8 iface, REFGUID rguidClass, DWORD dwIndex, LPDMUS_OBJECTDESC pDesc)
 {
 	ICOM_THIS(IDirectMusicLoader8Impl,iface);

 	FIXME("(%p, %s, %ld, %p): stub\n", This, debugstr_guid(rguidClass), dwIndex, pDesc);

 	return S_OK;
 }

 /* IDirectMusicLoader8 Interface part follow: */
 void WINAPI IDirectMusicLoader8Impl_CollectGarbage (LPDIRECTMUSICLOADER8 iface)
 {
 	ICOM_THIS(IDirectMusicLoader8Impl,iface);

 	FIXME("(%p): stub\n", This);
 }

 HRESULT WINAPI IDirectMusicLoader8Impl_ReleaseObjectByUnknown (LPDIRECTMUSICLOADER8 iface, IUnknown* pObject)
 {
 	ICOM_THIS(IDirectMusicLoader8Impl,iface);

 	FIXME("(%p, %p): stub\n", This, pObject);

 	return S_OK;
 }

 HRESULT WINAPI IDirectMusicLoader8Impl_LoadObjectFromFile (LPDIRECTMUSICLOADER8 iface,
 							   REFGUID rguidClassID,
 							   REFIID iidInterfaceID,
 							   WCHAR* pwzFilePath,
 							   void** ppObject)
 {
 	ICOM_THIS(IDirectMusicLoader8Impl,iface);
 	DMUS_OBJECTDESC ObjDesc;

 	TRACE("(%p, %s, %s, %s, %p): wrapping to IDirectMusicLoader8Impl_GetObject\n", This, debugstr_guid(rguidClassID), debugstr_guid(iidInterfaceID), debugstr_w(pwzFilePath), ppObject);

 	ObjDesc.dwSize = sizeof(DMUS_OBJECTDESC);
 	ObjDesc.dwValidData = DMUS_OBJ_FILENAME | DMUS_OBJ_FULLPATH | DMUS_OBJ_CLASS; /* I believe I've read somewhere in MSDN that this function requires either full path or relative path */
 	ObjDesc.guidClass = *rguidClassID;
 	strncpyW (ObjDesc.wszFileName, pwzFilePath, MAX_PATH);

 	return IDirectMusicLoader8Impl_GetObject (iface, &ObjDesc, iidInterfaceID, ppObject);
 }

 ICOM_VTABLE(IDirectMusicLoader8) DirectMusicLoader8_Vtbl =
 {
     ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
 	IDirectMusicLoader8Impl_QueryInterface,
 	IDirectMusicLoader8Impl_AddRef,
 	IDirectMusicLoader8Impl_Release,
 	IDirectMusicLoader8Impl_GetObject,
 	IDirectMusicLoader8Impl_SetObject,
 	IDirectMusicLoader8Impl_SetSearchDirectory,
 	IDirectMusicLoader8Impl_ScanDirectory,
 	IDirectMusicLoader8Impl_CacheObject,
 	IDirectMusicLoader8Impl_ReleaseObject,
 	IDirectMusicLoader8Impl_ClearCache,
 	IDirectMusicLoader8Impl_EnableCache,
 	IDirectMusicLoader8Impl_EnumObject,
 	IDirectMusicLoader8Impl_CollectGarbage,
 	IDirectMusicLoader8Impl_ReleaseObjectByUnknown,
 	IDirectMusicLoader8Impl_LoadObjectFromFile
 };

 /* for ClassFactory */
 HRESULT WINAPI DMUSIC_CreateDirectMusicLoader (LPCGUID lpcGUID, LPDIRECTMUSICLOADER8 *ppDMLoad, LPUNKNOWN pUnkOuter)
 {
 	IDirectMusicLoader8Impl *dmloader;

 	TRACE("(%p,%p,%p)\n",lpcGUID, ppDMLoad, pUnkOuter);
 	if (IsEqualIID (lpcGUID, &IID_IDirectMusicLoader) ||
 	    IsEqualIID (lpcGUID, &IID_IDirectMusicLoader8)) {
 		dmloader = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(IDirectMusicLoader8Impl));
 		if (NULL == dmloader) {
 			*ppDMLoad = (LPDIRECTMUSICLOADER8)NULL;
 			return E_OUTOFMEMORY;
 		}
 		dmloader->lpVtbl = &DirectMusicLoader8_Vtbl;
 		dmloader->ref = 1;
 		*ppDMLoad = (LPDIRECTMUSICLOADER8)dmloader;
 		return S_OK;
 	}

 	WARN("No interface found\n");
 	return E_NOINTERFACE;
 }

 /* help function for IDirectMusicLoader8Impl_GetObject */
 HRESULT WINAPI DMUSIC_GetDefaultGMPath (WCHAR wszPath[MAX_PATH])
 {
 	HKEY hkDM;
 	DWORD returnType, sizeOfReturnBuffer = MAX_PATH;
 	char szPath[MAX_PATH];

 	if ((RegOpenKeyExA (HKEY_LOCAL_MACHINE, "Software\\Microsoft\\DirectMusic" , 0, KEY_READ, &hkDM) != ERROR_SUCCESS) ||
 	    (RegQueryValueExA (hkDM, "GMFilePath", NULL, &returnType, szPath, &sizeOfReturnBuffer) != ERROR_SUCCESS)) {
 		WARN(": registry entry missing\n" );
 		return E_FAIL;
 	}
 	/* FIXME: Check return types to ensure we're interpreting data right */
 	MultiByteToWideChar (CP_ACP, 0, szPath, -1, wszPath, MAX_PATH);

 	return S_OK;
 }
	/* IDirectMusicLoader8 Implementation
	*
	* Copyright (C) 2003 Rok Mandeljc
	*
	* This program is free software; you can redistribute it and/or modify
	* it under the terms of the GNU General Public License as published by
	* the Free Software Foundation; either version 2 of the License, or
	* (at your option) any later version.
	*
	* This program 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 Library General Public License for more details.
	*
	* You should have received a copy of the GNU General Public License
	* along with this program; if not, write to the Free Software
	* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
	*/

	#include "windef.h"
	#include "winbase.h"
	#include "winuser.h"
	#include "wingdi.h"
	#include "wine/debug.h"
	#include "wine/unicode.h"
	#include "winreg.h"

	#include "dmloader_private.h"

	WINE_DEFAULT_DEBUG_CHANNEL(dmloader);

	HRESULT WINAPI DMUSIC_GetDefaultGMPath (WCHAR wszPath[MAX_PATH]);

	/* IDirectMusicLoader8 IUnknown part: */
	HRESULT WINAPI IDirectMusicLoader8Impl_QueryInterface (LPDIRECTMUSICLOADER8 iface, REFIID riid, LPVOID *ppobj)
	{
	ICOM_THIS(IDirectMusicLoader8Impl,iface);

	if (IsEqualIID (riid, &IID_IUnknown) \|\|
	IsEqualIID (riid, &IID_IDirectMusicLoader) \|\|
	IsEqualIID (riid, &IID_IDirectMusicLoader8)) {
	IDirectMusicLoader8Impl_AddRef(iface);
	*ppobj = This;
	return S_OK;
	}

	WARN("(%p)->(%s,%p),not found\n",This,debugstr_guid(riid),ppobj);
	return E_NOINTERFACE;
	}

	ULONG WINAPI IDirectMusicLoader8Impl_AddRef (LPDIRECTMUSICLOADER8 iface)
	{
	ICOM_THIS(IDirectMusicLoader8Impl,iface);
	TRACE("(%p) : AddRef from %ld\n", This, This->ref);
	return ++(This->ref);
	}

	ULONG WINAPI IDirectMusicLoader8Impl_Release (LPDIRECTMUSICLOADER8 iface)
	{
	ICOM_THIS(IDirectMusicLoader8Impl,iface);
	ULONG ref = --This->ref;
	TRACE("(%p) : ReleaseRef to %ld\n", This, This->ref);
	if (ref == 0) {
	HeapFree(GetProcessHeap(), 0, This);
	}
	return ref;
	}

	/* IDirectMusicLoader8 IDirectMusicLoader part: */
	HRESULT WINAPI IDirectMusicLoader8Impl_GetObject (LPDIRECTMUSICLOADER8 iface, LPDMUS_OBJECTDESC pDesc, REFIID riid, LPVOID* ppv)
	{
	IDirectMusicObject* pObject;
	DMUS_OBJECTDESC desc;
	ICOM_THIS(IDirectMusicLoader8Impl,iface);
	int i;
	HRESULT result;

	TRACE("(%p, %p, %s, %p)\n", This, pDesc, debugstr_guid(riid), ppv);
	TRACE(": looking up cache");
	/* first, check if requested object is already in cache (check by name and GUID) */
	for (i = 0; i < This->dwCacheSize; i++) {
	if (pDesc->dwValidData & DMUS_OBJ_OBJECT) {
	if (IsEqualGUID (&pDesc->guidObject, &This->pCache[i].guidObject)) {
	TRACE(": object already exist in cache (found by GUID)\n");
	if (This->pCache[i].pObject) {
	return IDirectMusicObject_QueryInterface (This->pCache[i].pObject, riid, ppv);
	}
	}
	} else if (pDesc->dwValidData & DMUS_OBJ_FILENAME) {
	if (This->pCache[i].pwzFileName && !strncmpW(pDesc->wszFileName, This->pCache[i].pwzFileName, MAX_PATH)) {
	TRACE(": object already exist in cache (found by file name)\n");
	if (This->pCache[i].pObject) {
	return IDirectMusicObject_QueryInterface (This->pCache[i].pObject, riid, ppv);
	}
	}
	}
	}

	/* object doesn't exist in cache... guess we'll have to load it */
	TRACE(": object does not exist in cache\n");
	result = CoCreateInstance (&pDesc->guidClass, NULL, CLSCTX_INPROC_SERVER, &IID_IDirectMusicObject, (LPVOID*)&pObject);
	if (FAILED(result)) return result;
	if (pDesc->dwValidData & DMUS_OBJ_FILENAME) {
	/* load object from file */
	WCHAR wzFileName[MAX_PATH];
	ILoaderStream* pStream;
	IPersistStream *pPersistStream = NULL;
	/* if it's full path, don't add search directory path, otherwise do */
	if (pDesc->dwValidData & DMUS_OBJ_FULLPATH) {
	lstrcpyW( wzFileName, pDesc->wszFileName );
	} else {
	WCHAR *p;
	lstrcpyW( wzFileName, This->wzSearchPath );
	p = wzFileName + lstrlenW(wzFileName);
	if (p > wzFileName && p[-1] != '\\') *p++ = '\\';
	lstrcpyW( p, pDesc->wszFileName );
	}
	TRACE(": loading from file (%s)\n", debugstr_w(wzFileName));

	result = DMUSIC_CreateLoaderStream ((LPSTREAM*)&pStream);
	if (FAILED(result)) return result;

	result = ILoaderStream_Attach (pStream, wzFileName, (LPDIRECTMUSICLOADER)iface);
	if (FAILED(result)) return result;

	result = IDirectMusicObject_QueryInterface (pObject, &IID_IPersistStream, (LPVOID*)&pPersistStream);
	if (FAILED(result)) return result;

	result = IPersistStream_Load (pPersistStream, (LPSTREAM)pStream);
	if (FAILED(result)) return result;

	ILoaderStream_IStream_Release ((LPSTREAM)pStream);
	IPersistStream_Release (pPersistStream);
	} else if (pDesc->dwValidData & DMUS_OBJ_STREAM) {
	/* load object from stream */
	IStream* pClonedStream = NULL;
	IPersistStream* pPersistStream = NULL;

	TRACE(": loading from stream\n");
	result = IDirectMusicObject_QueryInterface (pObject, &IID_IPersistStream, (LPVOID*)&pPersistStream);
	if (FAILED(result)) {
	TRACE("couln\'t get IPersistStream\n");
	return result;
	}

	result = IStream_Clone (pDesc->pStream, &pClonedStream);
	if (FAILED(result)) {
	TRACE("failed to clone\n");
	return result;
	}

	result = IPersistStream_Load (pPersistStream, pClonedStream);
	if (FAILED(result)) {
	TRACE("failed to load\n");
	return result;
	}

	IPersistStream_Release (pPersistStream);
	IStream_Release (pClonedStream);
	} else if (pDesc->dwValidData & DMUS_OBJ_OBJECT) {
	/* load object by GUID */
	TRACE(": loading by GUID (only default DLS supported)\n");
	if (IsEqualGUID (&pDesc->guidObject, &GUID_DefaultGMCollection)) {
	/* great idea: let's just change dwValid and wszFileName fields and then call ourselves again :D */
	pDesc->dwValidData = DMUS_OBJ_FILENAME \| DMUS_OBJ_FULLPATH;
	if (FAILED(DMUSIC_GetDefaultGMPath (pDesc->wszFileName)))
	return E_FAIL;
	return IDirectMusicLoader8Impl_GetObject (iface, pDesc, riid, ppv);
	} else {
	return E_FAIL;
	}
	} else {
	/* nowhere to load from */
	FIXME(": unknown/unsupported way of loading\n");
	return E_FAIL;
	}

	memset((LPVOID)&desc, 0, sizeof(desc));
	desc.dwSize = sizeof (DMUS_OBJECTDESC);
	IDirectMusicObject_GetDescriptor (pObject, &desc);

	/* tests with native dlls show that descriptor, which is recieved by GetDescriptor doesn't contain filepath
	therefore we must copy it from input description */
	if (pDesc->dwValidData & DMUS_OBJ_FILENAME \|\| desc.dwValidData & DMUS_OBJ_OBJECT) {
	DMUS_PRIVATE_CACHE_ENTRY CacheEntry;
	This->dwCacheSize++; /* increase size of cache for one entry */
	This->pCache = HeapReAlloc (GetProcessHeap (), 0, This->pCache, sizeof(DMUS_PRIVATE_CACHE_ENTRY) * This->dwCacheSize);
	if (desc.dwValidData & DMUS_OBJ_OBJECT)
	CacheEntry.guidObject = desc.guidObject;
	if (pDesc->dwValidData & DMUS_OBJ_FILENAME)
	strncpyW (CacheEntry.pwzFileName, pDesc->wszFileName, MAX_PATH);
	CacheEntry.pObject = pObject;
	IDirectMusicObject_AddRef (pObject); /* MSDN says that we should */
	This->pCache[This->dwCacheSize - 1] = CacheEntry; /* fill in one backward, as list is zero based */
	TRACE(": filled in cache entry\n");
	}

	TRACE(": nr. of entries = %ld\n", This->dwCacheSize);
	for (i = 0; i < This->dwCacheSize; i++) {
	TRACE(": cache entry [%i]: GUID = %s, file name = %s, object = %p\n", i, debugstr_guid(&This->pCache[i].guidObject), debugstr_w(This->pCache[i].pwzFileName), This->pCache[i].pObject);
	}

	return IDirectMusicObject_QueryInterface (pObject, riid, ppv);
	}

	HRESULT WINAPI IDirectMusicLoader8Impl_SetObject (LPDIRECTMUSICLOADER8 iface, LPDMUS_OBJECTDESC pDesc)
	{
	ICOM_THIS(IDirectMusicLoader8Impl,iface);

	FIXME("(%p, %p): stub\n", This, pDesc);

	return S_OK;
	}

	HRESULT WINAPI IDirectMusicLoader8Impl_SetSearchDirectory (LPDIRECTMUSICLOADER8 iface, REFGUID rguidClass, WCHAR* pwzPath, BOOL fClear)
	{
	ICOM_THIS(IDirectMusicLoader8Impl,iface);

	TRACE("(%p, %s, %p, %d)\n", This, debugstr_guid(rguidClass), pwzPath, fClear);
	if (0 == strncmpW(This->wzSearchPath, pwzPath, MAX_PATH)) {
	return S_FALSE;
	}
	strncpyW(This->wzSearchPath, pwzPath, MAX_PATH);

	return S_OK;
	}

	HRESULT WINAPI IDirectMusicLoader8Impl_ScanDirectory (LPDIRECTMUSICLOADER8 iface, REFGUID rguidClass, WCHAR* pwzFileExtension, WCHAR* pwzScanFileName)
	{
	ICOM_THIS(IDirectMusicLoader8Impl,iface);

	FIXME("(%p, %s, %p, %p): stub\n", This, debugstr_guid(rguidClass), pwzFileExtension, pwzScanFileName);

	return S_OK;
	}

	HRESULT WINAPI IDirectMusicLoader8Impl_CacheObject (LPDIRECTMUSICLOADER8 iface, IDirectMusicObject* pObject)
	{
	ICOM_THIS(IDirectMusicLoader8Impl,iface);

	FIXME("(%p, %p): stub\n", This, pObject);

	return S_OK;
	}

	HRESULT WINAPI IDirectMusicLoader8Impl_ReleaseObject (LPDIRECTMUSICLOADER8 iface, IDirectMusicObject* pObject)
	{
	ICOM_THIS(IDirectMusicLoader8Impl,iface);

	FIXME("(%p, %p): stub\n", This, pObject);

	return S_OK;
	}

	HRESULT WINAPI IDirectMusicLoader8Impl_ClearCache (LPDIRECTMUSICLOADER8 iface, REFGUID rguidClass)
	{
	ICOM_THIS(IDirectMusicLoader8Impl,iface);

	FIXME("(%p, %s): stub\n", This, debugstr_guid(rguidClass));

	return S_OK;
	}

	HRESULT WINAPI IDirectMusicLoader8Impl_EnableCache (LPDIRECTMUSICLOADER8 iface, REFGUID rguidClass, BOOL fEnable)
	{
	ICOM_THIS(IDirectMusicLoader8Impl,iface);

	FIXME("(%p, %s, %d): stub\n", This, debugstr_guid(rguidClass), fEnable);

	return S_OK;
	}

	HRESULT WINAPI IDirectMusicLoader8Impl_EnumObject (LPDIRECTMUSICLOADER8 iface, REFGUID rguidClass, DWORD dwIndex, LPDMUS_OBJECTDESC pDesc)
	{
	ICOM_THIS(IDirectMusicLoader8Impl,iface);

	FIXME("(%p, %s, %ld, %p): stub\n", This, debugstr_guid(rguidClass), dwIndex, pDesc);

	return S_OK;
	}

	/* IDirectMusicLoader8 Interface part follow: */
	void WINAPI IDirectMusicLoader8Impl_CollectGarbage (LPDIRECTMUSICLOADER8 iface)
	{
	ICOM_THIS(IDirectMusicLoader8Impl,iface);

	FIXME("(%p): stub\n", This);
	}

	HRESULT WINAPI IDirectMusicLoader8Impl_ReleaseObjectByUnknown (LPDIRECTMUSICLOADER8 iface, IUnknown* pObject)
	{
	ICOM_THIS(IDirectMusicLoader8Impl,iface);

	FIXME("(%p, %p): stub\n", This, pObject);

	return S_OK;
	}

	HRESULT WINAPI IDirectMusicLoader8Impl_LoadObjectFromFile (LPDIRECTMUSICLOADER8 iface,
	REFGUID rguidClassID,
	REFIID iidInterfaceID,
	WCHAR* pwzFilePath,
	void** ppObject)
	{
	ICOM_THIS(IDirectMusicLoader8Impl,iface);
	DMUS_OBJECTDESC ObjDesc;

	TRACE("(%p, %s, %s, %s, %p): wrapping to IDirectMusicLoader8Impl_GetObject\n", This, debugstr_guid(rguidClassID), debugstr_guid(iidInterfaceID), debugstr_w(pwzFilePath), ppObject);

	ObjDesc.dwSize = sizeof(DMUS_OBJECTDESC);
	ObjDesc.dwValidData = DMUS_OBJ_FILENAME \| DMUS_OBJ_FULLPATH \| DMUS_OBJ_CLASS; /* I believe I've read somewhere in MSDN that this function requires either full path or relative path */
	ObjDesc.guidClass = *rguidClassID;
	strncpyW (ObjDesc.wszFileName, pwzFilePath, MAX_PATH);

	return IDirectMusicLoader8Impl_GetObject (iface, &ObjDesc, iidInterfaceID, ppObject);
	}

	ICOM_VTABLE(IDirectMusicLoader8) DirectMusicLoader8_Vtbl =
	{
	ICOM_MSVTABLE_COMPAT_DummyRTTIVALUE
	IDirectMusicLoader8Impl_QueryInterface,
	IDirectMusicLoader8Impl_AddRef,
	IDirectMusicLoader8Impl_Release,
	IDirectMusicLoader8Impl_GetObject,
	IDirectMusicLoader8Impl_SetObject,
	IDirectMusicLoader8Impl_SetSearchDirectory,
	IDirectMusicLoader8Impl_ScanDirectory,
	IDirectMusicLoader8Impl_CacheObject,
	IDirectMusicLoader8Impl_ReleaseObject,
	IDirectMusicLoader8Impl_ClearCache,
	IDirectMusicLoader8Impl_EnableCache,
	IDirectMusicLoader8Impl_EnumObject,
	IDirectMusicLoader8Impl_CollectGarbage,
	IDirectMusicLoader8Impl_ReleaseObjectByUnknown,
	IDirectMusicLoader8Impl_LoadObjectFromFile
	};

	/* for ClassFactory */
	HRESULT WINAPI DMUSIC_CreateDirectMusicLoader (LPCGUID lpcGUID, LPDIRECTMUSICLOADER8 *ppDMLoad, LPUNKNOWN pUnkOuter)
	{
	IDirectMusicLoader8Impl *dmloader;

	TRACE("(%p,%p,%p)\n",lpcGUID, ppDMLoad, pUnkOuter);
	if (IsEqualIID (lpcGUID, &IID_IDirectMusicLoader) \|\|
	IsEqualIID (lpcGUID, &IID_IDirectMusicLoader8)) {
	dmloader = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(IDirectMusicLoader8Impl));
	if (NULL == dmloader) {
	*ppDMLoad = (LPDIRECTMUSICLOADER8)NULL;
	return E_OUTOFMEMORY;
	}
	dmloader->lpVtbl = &DirectMusicLoader8_Vtbl;
	dmloader->ref = 1;
	*ppDMLoad = (LPDIRECTMUSICLOADER8)dmloader;
	return S_OK;
	}

	WARN("No interface found\n");
	return E_NOINTERFACE;
	}

	/* help function for IDirectMusicLoader8Impl_GetObject */
	HRESULT WINAPI DMUSIC_GetDefaultGMPath (WCHAR wszPath[MAX_PATH])
	{
	HKEY hkDM;
	DWORD returnType, sizeOfReturnBuffer = MAX_PATH;
	char szPath[MAX_PATH];

	if ((RegOpenKeyExA (HKEY_LOCAL_MACHINE, "Software\\Microsoft\\DirectMusic" , 0, KEY_READ, &hkDM) != ERROR_SUCCESS) \|\|
	(RegQueryValueExA (hkDM, "GMFilePath", NULL, &returnType, szPath, &sizeOfReturnBuffer) != ERROR_SUCCESS)) {
	WARN(": registry entry missing\n" );
	return E_FAIL;
	}
	/* FIXME: Check return types to ensure we're interpreting data right */
	MultiByteToWideChar (CP_ACP, 0, szPath, -1, wszPath, MAX_PATH);

	return S_OK;
	}