dlls/dmstyle/styletrack.c

   1 /* IDirectMusicStyleTrack Implementation
   2  *
   3  * Copyright (C) 2003-2004 Rok Mandeljc
   4  *
   5  * This program is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU Lesser General Public
   7  * License as published by the Free Software Foundation; either
   8  * version 2.1 of the License, or (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * Lesser General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU Lesser General Public
  16  * License along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  18  */
  19
  20 #include "dmstyle_private.h"
  21 #include "dmobject.h"
  22
  23 #include "wine/heap.h"
  24
  25 WINE_DEFAULT_DEBUG_CHANNEL(dmstyle);
  26 WINE_DECLARE_DEBUG_CHANNEL(dmfile);
  27
  28 /*****************************************************************************
  29  * IDirectMusicStyleTrack implementation
  30  */
  31 typedef struct IDirectMusicStyleTrack {
  32     IDirectMusicTrack8 IDirectMusicTrack8_iface;
  33     struct dmobject dmobj;  /* IPersistStream only */
  34     LONG ref;
  35     struct list Items;
  36 } IDirectMusicStyleTrack;
  37
  38 /* IDirectMusicStyleTrack IDirectMusicTrack8 part: */
  39 static inline IDirectMusicStyleTrack *impl_from_IDirectMusicTrack8(IDirectMusicTrack8 *iface)
  40 {
  41     return CONTAINING_RECORD(iface, IDirectMusicStyleTrack, IDirectMusicTrack8_iface);
  42 }
  43
  44 static HRESULT WINAPI style_track_QueryInterface(IDirectMusicTrack8 *iface, REFIID riid,
  45         void **ret_iface)
  46 {
  47     IDirectMusicStyleTrack *This = impl_from_IDirectMusicTrack8(iface);
  48
  49     TRACE("(%p, %s, %p)\n", This, debugstr_dmguid(riid), ret_iface);
  50
  51     *ret_iface = NULL;
  52
  53     if (IsEqualIID(riid, &IID_IUnknown) || IsEqualIID(riid, &IID_IDirectMusicTrack) ||
  54             IsEqualIID(riid, &IID_IDirectMusicTrack8))
  55         *ret_iface = iface;
  56     else if (IsEqualIID(riid, &IID_IPersistStream))
  57         *ret_iface = &This->dmobj.IPersistStream_iface;
  58     else {
  59         WARN("(%p, %s, %p): not found\n", This, debugstr_dmguid(riid), ret_iface);
  60         return E_NOINTERFACE;
  61     }
  62
  63     IUnknown_AddRef((IUnknown*)*ret_iface);
  64     return S_OK;
  65 }
  66
  67 static ULONG WINAPI style_track_AddRef(IDirectMusicTrack8 *iface)
  68 {
  69     IDirectMusicStyleTrack *This = impl_from_IDirectMusicTrack8(iface);
  70     LONG ref = InterlockedIncrement(&This->ref);
  71
  72     TRACE("(%p) ref=%d\n", This, ref);
  73
  74     return ref;
  75 }
  76
  77 static ULONG WINAPI style_track_Release(IDirectMusicTrack8 *iface)
  78 {
  79     IDirectMusicStyleTrack *This = impl_from_IDirectMusicTrack8(iface);
  80     LONG ref = InterlockedDecrement(&This->ref);
  81
  82     TRACE("(%p) ref=%d\n", This, ref);
  83
  84     if (!ref) {
  85         struct list *cursor, *cursor2;
  86         DMUS_PRIVATE_STYLE_ITEM *item;
  87
  88         LIST_FOR_EACH_SAFE(cursor, cursor2, &This->Items) {
  89             item = LIST_ENTRY(cursor, DMUS_PRIVATE_STYLE_ITEM, entry);
  90             list_remove(cursor);
  91
  92             IDirectMusicStyle8_Release(item->pObject);
  93             heap_free(item);
  94         }
  95
  96         heap_free(This);
  97         DMSTYLE_UnlockModule();
  98     }
  99
 100     return ref;
 101 }
 102
 103 static HRESULT WINAPI style_track_Init(IDirectMusicTrack8 *iface, IDirectMusicSegment *pSegment)
 104 {
 105         IDirectMusicStyleTrack *This = impl_from_IDirectMusicTrack8(iface);
 106         FIXME("(%p, %p): stub\n", This, pSegment);
 107         return S_OK;
 108 }
 109
 110 static HRESULT WINAPI style_track_InitPlay(IDirectMusicTrack8 *iface,
 111         IDirectMusicSegmentState *pSegmentState, IDirectMusicPerformance *pPerformance,
 112         void **ppStateData, DWORD dwVirtualTrack8ID, DWORD dwFlags)
 113 {
 114         IDirectMusicStyleTrack *This = impl_from_IDirectMusicTrack8(iface);
 115         FIXME("(%p, %p, %p, %p, %d, %d): stub\n", This, pSegmentState, pPerformance, ppStateData, dwVirtualTrack8ID, dwFlags);
 116         return S_OK;
 117 }
 118
 119 static HRESULT WINAPI style_track_EndPlay(IDirectMusicTrack8 *iface, void *pStateData)
 120 {
 121         IDirectMusicStyleTrack *This = impl_from_IDirectMusicTrack8(iface);
 122         FIXME("(%p, %p): stub\n", This, pStateData);
 123         return S_OK;
 124 }
 125
 126 static HRESULT WINAPI style_track_Play(IDirectMusicTrack8 *iface, void *pStateData,
 127         MUSIC_TIME mtStart, MUSIC_TIME mtEnd, MUSIC_TIME mtOffset, DWORD dwFlags,
 128         IDirectMusicPerformance *pPerf, IDirectMusicSegmentState *pSegSt, DWORD dwVirtualID)
 129 {
 130         IDirectMusicStyleTrack *This = impl_from_IDirectMusicTrack8(iface);
 131         FIXME("(%p, %p, %d, %d, %d, %d, %p, %p, %d): stub\n", This, pStateData, mtStart, mtEnd, mtOffset, dwFlags, pPerf, pSegSt, dwVirtualID);
 132         return S_OK;
 133 }
 134
 135 static HRESULT WINAPI style_track_GetParam(IDirectMusicTrack8 *iface, REFGUID type,
 136         MUSIC_TIME time, MUSIC_TIME *next, void *param)
 137 {
 138     IDirectMusicStyleTrack *This = impl_from_IDirectMusicTrack8(iface);
 139     struct list *item = NULL;
 140
 141     TRACE("(%p, %s, %d, %p, %p):\n", This, debugstr_dmguid(type), time, next, param);
 142
 143     if (!type)
 144         return E_POINTER;
 145
 146     if (IsEqualGUID(&GUID_IDirectMusicStyle, type)) {
 147         LIST_FOR_EACH (item, &This->Items) {
 148             DMUS_PRIVATE_STYLE_ITEM *style = LIST_ENTRY(item, DMUS_PRIVATE_STYLE_ITEM, entry);
 149             if (style->pObject) {
 150                 IDirectMusicStyle8_AddRef(style->pObject);
 151                 *((IDirectMusicStyle8**)param) = style->pObject;
 152
 153                 return S_OK;
 154             }
 155         }
 156
 157         return DMUS_E_NOT_FOUND;
 158     } else if (IsEqualGUID(&GUID_TimeSignature, type)) {
 159         FIXME("GUID_TimeSignature not handled yet\n");
 160         return S_OK;
 161     }
 162
 163     return DMUS_E_GET_UNSUPPORTED;
 164 }
 165
 166 static HRESULT WINAPI style_track_SetParam(IDirectMusicTrack8 *iface, REFGUID type, MUSIC_TIME time,
 167         void *param)
 168 {
 169     IDirectMusicStyleTrack *This = impl_from_IDirectMusicTrack8(iface);
 170
 171     TRACE("(%p, %s, %d, %p)\n", This, debugstr_dmguid(type), time, param);
 172
 173     if (!type)
 174         return E_POINTER;
 175
 176     if (IsEqualGUID(type, &GUID_DisableTimeSig)) {
 177         FIXME("GUID_DisableTimeSig not handled yet\n");
 178         return S_OK;
 179     } else if (IsEqualGUID(type, &GUID_EnableTimeSig)) {
 180         FIXME("GUID_EnableTimeSig not handled yet\n");
 181         return S_OK;
 182     } else if (IsEqualGUID(type, &GUID_IDirectMusicStyle)) {
 183         FIXME("GUID_IDirectMusicStyle not handled yet\n");
 184         return S_OK;
 185     } else if (IsEqualGUID(type, &GUID_SeedVariations)) {
 186         FIXME("GUID_SeedVariations not handled yet\n");
 187         return S_OK;
 188     }
 189
 190     return DMUS_E_SET_UNSUPPORTED;
 191 }
 192
 193 static HRESULT WINAPI style_track_IsParamSupported(IDirectMusicTrack8 *iface, REFGUID rguidType)
 194 {
 195         IDirectMusicStyleTrack *This = impl_from_IDirectMusicTrack8(iface);
 196
 197         TRACE("(%p, %s)\n", This, debugstr_dmguid(rguidType));
 198
 199         if (!rguidType)
 200                 return E_POINTER;
 201
 202         if (IsEqualGUID (rguidType, &GUID_DisableTimeSig)
 203                 || IsEqualGUID (rguidType, &GUID_EnableTimeSig)
 204                 || IsEqualGUID (rguidType, &GUID_IDirectMusicStyle)
 205                 || IsEqualGUID (rguidType, &GUID_SeedVariations)
 206                 || IsEqualGUID (rguidType, &GUID_TimeSignature)) {
 207                 TRACE("param supported\n");
 208                 return S_OK;
 209         }
 210         TRACE("param unsupported\n");
 211         return DMUS_E_TYPE_UNSUPPORTED;
 212 }
 213
 214 static HRESULT WINAPI style_track_AddNotificationType(IDirectMusicTrack8 *iface,
 215         REFGUID rguidNotificationType)
 216 {
 217         IDirectMusicStyleTrack *This = impl_from_IDirectMusicTrack8(iface);
 218         FIXME("(%p, %s): stub\n", This, debugstr_dmguid(rguidNotificationType));
 219         return S_OK;
 220 }
 221
 222 static HRESULT WINAPI style_track_RemoveNotificationType(IDirectMusicTrack8 *iface,
 223         REFGUID rguidNotificationType)
 224 {
 225         IDirectMusicStyleTrack *This = impl_from_IDirectMusicTrack8(iface);
 226         FIXME("(%p, %s): stub\n", This, debugstr_dmguid(rguidNotificationType));
 227         return S_OK;
 228 }
 229
 230 static HRESULT WINAPI style_track_Clone(IDirectMusicTrack8 *iface, MUSIC_TIME mtStart,
 231         MUSIC_TIME mtEnd, IDirectMusicTrack **ppTrack)
 232 {
 233         IDirectMusicStyleTrack *This = impl_from_IDirectMusicTrack8(iface);
 234         FIXME("(%p, %d, %d, %p): stub\n", This, mtStart, mtEnd, ppTrack);
 235         return S_OK;
 236 }
 237
 238 static HRESULT WINAPI style_track_PlayEx(IDirectMusicTrack8 *iface, void *pStateData,
 239         REFERENCE_TIME rtStart, REFERENCE_TIME rtEnd, REFERENCE_TIME rtOffset, DWORD dwFlags,
 240         IDirectMusicPerformance *pPerf, IDirectMusicSegmentState *pSegSt, DWORD dwVirtualID)
 241 {
 242         IDirectMusicStyleTrack *This = impl_from_IDirectMusicTrack8(iface);
 243         FIXME("(%p, %p, 0x%s, 0x%s, 0x%s, %d, %p, %p, %d): stub\n", This, pStateData, wine_dbgstr_longlong(rtStart),
 244             wine_dbgstr_longlong(rtEnd), wine_dbgstr_longlong(rtOffset), dwFlags, pPerf, pSegSt, dwVirtualID);
 245         return S_OK;
 246 }
 247
 248 static HRESULT WINAPI style_track_GetParamEx(IDirectMusicTrack8 *iface, REFGUID rguidType,
 249         REFERENCE_TIME rtTime, REFERENCE_TIME *prtNext, void *pParam, void *pStateData,
 250         DWORD dwFlags)
 251 {
 252         IDirectMusicStyleTrack *This = impl_from_IDirectMusicTrack8(iface);
 253         FIXME("(%p, %s, 0x%s, %p, %p, %p, %d): stub\n", This, debugstr_dmguid(rguidType),
 254             wine_dbgstr_longlong(rtTime), prtNext, pParam, pStateData, dwFlags);
 255         return S_OK;
 256 }
 257
 258 static HRESULT WINAPI style_track_SetParamEx(IDirectMusicTrack8 *iface, REFGUID rguidType,
 259         REFERENCE_TIME rtTime, void *pParam, void *pStateData, DWORD dwFlags)
 260 {
 261         IDirectMusicStyleTrack *This = impl_from_IDirectMusicTrack8(iface);
 262         FIXME("(%p, %s, 0x%s, %p, %p, %d): stub\n", This, debugstr_dmguid(rguidType),
 263             wine_dbgstr_longlong(rtTime), pParam, pStateData, dwFlags);
 264         return S_OK;
 265 }
 266
 267 static HRESULT WINAPI style_track_Compose(IDirectMusicTrack8 *iface, IUnknown *context,
 268         DWORD trackgroup, IDirectMusicTrack **track)
 269 {
 270     IDirectMusicStyleTrack *This = impl_from_IDirectMusicTrack8(iface);
 271
 272     TRACE("(%p, %p, %d, %p): method not implemented\n", This, context, trackgroup, track);
 273     return E_NOTIMPL;
 274 }
 275
 276 static HRESULT WINAPI style_track_Join(IDirectMusicTrack8 *iface, IDirectMusicTrack *pNewTrack,
 277         MUSIC_TIME mtJoin, IUnknown *pContext, DWORD dwTrackGroup,
 278         IDirectMusicTrack **ppResultTrack)
 279 {
 280         IDirectMusicStyleTrack *This = impl_from_IDirectMusicTrack8(iface);
 281         FIXME("(%p, %p, %d, %p, %d, %p): stub\n", This, pNewTrack, mtJoin, pContext, dwTrackGroup, ppResultTrack);
 282         return S_OK;
 283 }
 284
 285 static const IDirectMusicTrack8Vtbl dmtrack8_vtbl = {
 286     style_track_QueryInterface,
 287     style_track_AddRef,
 288     style_track_Release,
 289     style_track_Init,
 290     style_track_InitPlay,
 291     style_track_EndPlay,
 292     style_track_Play,
 293     style_track_GetParam,
 294     style_track_SetParam,
 295     style_track_IsParamSupported,
 296     style_track_AddNotificationType,
 297     style_track_RemoveNotificationType,
 298     style_track_Clone,
 299     style_track_PlayEx,
 300     style_track_GetParamEx,
 301     style_track_SetParamEx,
 302     style_track_Compose,
 303     style_track_Join
 304 };
 305
 306 static HRESULT parse_style_ref(IDirectMusicStyleTrack *This, DMUS_PRIVATE_CHUNK *pChunk,
 307         IStream *pStm)
 308 {
 309   DMUS_PRIVATE_CHUNK Chunk;
 310   DWORD ListSize[3], ListCount[3];
 311   LARGE_INTEGER liMove; /* used when skipping chunks */
 312   HRESULT hr;
 313
 314   IDirectMusicObject* pObject = NULL;
 315   LPDMUS_PRIVATE_STYLE_ITEM pNewItem = NULL;
 316
 317   if (pChunk->fccID != DMUS_FOURCC_STYLE_REF_LIST) {
 318     ERR_(dmfile)(": %s chunk should be a STYLE list\n", debugstr_fourcc (pChunk->fccID));
 319     return E_FAIL;
 320   }
 321
 322   ListSize[0] = pChunk->dwSize - sizeof(FOURCC);
 323   ListCount[0] = 0;
 324
 325   do {
 326     IStream_Read (pStm, &Chunk, sizeof(FOURCC)+sizeof(DWORD), NULL);
 327     ListCount[0] += sizeof(FOURCC) + sizeof(DWORD) + Chunk.dwSize;
 328     TRACE_(dmfile)(": %s chunk (size = %d)", debugstr_fourcc (Chunk.fccID), Chunk.dwSize);
 329     switch (Chunk.fccID) {
 330     case DMUS_FOURCC_TIME_STAMP_CHUNK: {
 331       TRACE_(dmfile)(": Time Stamp chunk\n");
 332       pNewItem = HeapAlloc (GetProcessHeap (), HEAP_ZERO_MEMORY, sizeof(DMUS_PRIVATE_STYLE_ITEM));
 333       if (NULL == pNewItem) {
 334         ERR(": no more memory\n");
 335         return  E_OUTOFMEMORY;
 336       }
 337       IStream_Read (pStm, &pNewItem->dwTimeStamp, sizeof(DWORD), NULL);
 338       TRACE_(dmfile)(" - dwTimeStamp: %u\n", pNewItem->dwTimeStamp);
 339       list_add_tail (&This->Items, &pNewItem->entry);
 340       break;
 341     }
 342     case FOURCC_LIST: {
 343       IStream_Read (pStm, &Chunk.fccID, sizeof(FOURCC), NULL);
 344       TRACE_(dmfile)(": LIST chunk of type %s", debugstr_fourcc(Chunk.fccID));
 345       ListSize[1] = Chunk.dwSize - sizeof(FOURCC);
 346       ListCount[1] = 0;
 347       switch (Chunk.fccID) {
 348         /**
 349          * should be a DMRF (DirectMusic Reference) list @TODO
 350          */
 351       case DMUS_FOURCC_REF_LIST: {
 352         FIXME_(dmfile)(": DMRF (DM References) list, not yet handled\n");
 353         hr = IDirectMusicUtils_IPersistStream_ParseReference(&This->dmobj.IPersistStream_iface,
 354                 &Chunk, pStm, &pObject);
 355         if (FAILED(hr)) {
 356           ERR(": could not load Reference\n");
 357           return hr;
 358         }
 359         hr = IDirectMusicObject_QueryInterface(pObject, &IID_IDirectMusicStyle8, (LPVOID*)&pNewItem->pObject);
 360         if (FAILED(hr)) {
 361           ERR(": Reference not an IDirectMusicStyle, exiting\n");
 362           exit(-1);
 363           return hr;
 364         }
 365         IDirectMusicObject_Release(pObject);
 366         break;
 367       }
 368       default: {
 369         TRACE_(dmfile)(": unknown (skipping)\n");
 370         liMove.QuadPart = Chunk.dwSize - sizeof(FOURCC);
 371         IStream_Seek (pStm, liMove, STREAM_SEEK_CUR, NULL);
 372         break;
 373       }
 374       }
 375       break;
 376     }
 377     default: {
 378       TRACE_(dmfile)(": unknown chunk (irrelevant & skipping)\n");
 379       liMove.QuadPart = Chunk.dwSize;
 380       IStream_Seek (pStm, liMove, STREAM_SEEK_CUR, NULL);
 381       break;
 382     }
 383     }
 384     TRACE_(dmfile)(": ListCount[0] = %d < ListSize[0] = %d\n", ListCount[0], ListSize[0]);
 385   } while (ListCount[0] < ListSize[0]);
 386
 387   return S_OK;
 388 }
 389
 390 static HRESULT parse_styletrack_list(IDirectMusicStyleTrack *This, DMUS_PRIVATE_CHUNK *pChunk,
 391         IStream *pStm)
 392 {
 393   DMUS_PRIVATE_CHUNK Chunk;
 394   DWORD ListSize[3], ListCount[3];
 395   LARGE_INTEGER liMove; /* used when skipping chunks */
 396   HRESULT hr;
 397
 398   if (pChunk->fccID != DMUS_FOURCC_STYLE_TRACK_LIST) {
 399     ERR_(dmfile)(": %s chunk should be a STYLETRACK list\n", debugstr_fourcc (pChunk->fccID));
 400     return E_FAIL;
 401   }
 402
 403   ListSize[0] = pChunk->dwSize - sizeof(FOURCC);
 404   ListCount[0] = 0;
 405
 406   do {
 407     IStream_Read (pStm, &Chunk, sizeof(FOURCC)+sizeof(DWORD), NULL);
 408     ListCount[0] += sizeof(FOURCC) + sizeof(DWORD) + Chunk.dwSize;
 409     TRACE_(dmfile)(": %s chunk (size = %d)", debugstr_fourcc (Chunk.fccID), Chunk.dwSize);
 410     switch (Chunk.fccID) {
 411     case FOURCC_LIST: {
 412       IStream_Read (pStm, &Chunk.fccID, sizeof(FOURCC), NULL);
 413       TRACE_(dmfile)(": LIST chunk of type %s", debugstr_fourcc(Chunk.fccID));
 414       ListSize[1] = Chunk.dwSize - sizeof(FOURCC);
 415       ListCount[1] = 0;
 416       switch (Chunk.fccID) {
 417       case DMUS_FOURCC_STYLE_REF_LIST: {
 418         TRACE_(dmfile)(": STYLE_REF list\n");
 419         hr = parse_style_ref(This, &Chunk, pStm);
 420         if (FAILED(hr)) return hr;
 421         break;
 422       }
 423       default: {
 424         TRACE_(dmfile)(": unknown (skipping)\n");
 425         liMove.QuadPart = Chunk.dwSize - sizeof(FOURCC);
 426         IStream_Seek (pStm, liMove, STREAM_SEEK_CUR, NULL);
 427         break;
 428       }
 429       }
 430       break;
 431     }
 432     default: {
 433       TRACE_(dmfile)(": unknown chunk (irrelevant & skipping)\n");
 434       liMove.QuadPart = Chunk.dwSize;
 435       IStream_Seek (pStm, liMove, STREAM_SEEK_CUR, NULL);
 436       break;
 437     }
 438     }
 439     TRACE_(dmfile)(": ListCount[0] = %d < ListSize[0] = %d\n", ListCount[0], ListSize[0]);
 440   } while (ListCount[0] < ListSize[0]);
 441
 442   return S_OK;
 443 }
 444
 445 static inline IDirectMusicStyleTrack *impl_from_IPersistStream(IPersistStream *iface)
 446 {
 447     return CONTAINING_RECORD(iface, IDirectMusicStyleTrack, dmobj.IPersistStream_iface);
 448 }
 449
 450 static HRESULT WINAPI IPersistStreamImpl_Load(IPersistStream *iface, IStream *pStm)
 451 {
 452   IDirectMusicStyleTrack *This = impl_from_IPersistStream(iface);
 453   DMUS_PRIVATE_CHUNK Chunk;
 454   LARGE_INTEGER liMove;
 455   HRESULT hr;
 456
 457   FIXME("(%p, %p): Loading not fully implemented yet\n", This, pStm);
 458
 459   IStream_Read (pStm, &Chunk, sizeof(FOURCC)+sizeof(DWORD), NULL);
 460   TRACE_(dmfile)(": %s chunk (size = %d)", debugstr_fourcc (Chunk.fccID), Chunk.dwSize);
 461   switch (Chunk.fccID) {
 462   case FOURCC_LIST: {
 463     IStream_Read (pStm, &Chunk.fccID, sizeof(FOURCC), NULL);
 464     TRACE_(dmfile)(": %s chunk (size = %d)", debugstr_fourcc (Chunk.fccID), Chunk.dwSize);
 465     switch (Chunk.fccID) {
 466     case DMUS_FOURCC_STYLE_TRACK_LIST: {
 467       TRACE_(dmfile)(": Chord track list\n");
 468       hr = parse_styletrack_list(This, &Chunk, pStm);
 469       if (FAILED(hr)) return hr;
 470       break;
 471     }
 472     default: {
 473       TRACE_(dmfile)(": unexpected chunk; loading failed)\n");
 474       liMove.QuadPart = Chunk.dwSize;
 475       IStream_Seek (pStm, liMove, STREAM_SEEK_CUR, NULL);
 476       return E_FAIL;
 477     }
 478     }
 479     TRACE_(dmfile)(": reading finished\n");
 480     break;
 481   }
 482   default: {
 483     TRACE_(dmfile)(": unexpected chunk; loading failed)\n");
 484     liMove.QuadPart = Chunk.dwSize;
 485     IStream_Seek (pStm, liMove, STREAM_SEEK_CUR, NULL); /* skip the rest of the chunk */
 486     return E_FAIL;
 487   }
 488   }
 489
 490   return S_OK;
 491 }
 492
 493 static const IPersistStreamVtbl persiststream_vtbl = {
 494     dmobj_IPersistStream_QueryInterface,
 495     dmobj_IPersistStream_AddRef,
 496     dmobj_IPersistStream_Release,
 497     dmobj_IPersistStream_GetClassID,
 498     unimpl_IPersistStream_IsDirty,
 499     IPersistStreamImpl_Load,
 500     unimpl_IPersistStream_Save,
 501     unimpl_IPersistStream_GetSizeMax
 502 };
 503
 504 /* for ClassFactory */
 505 HRESULT WINAPI create_dmstyletrack(REFIID lpcGUID, void **ppobj)
 506 {
 507     IDirectMusicStyleTrack *track;
 508     HRESULT hr;
 509
 510     track = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(*track));
 511     if (!track) {
 512         *ppobj = NULL;
 513         return E_OUTOFMEMORY;
 514     }
 515     track->IDirectMusicTrack8_iface.lpVtbl = &dmtrack8_vtbl;
 516     track->ref = 1;
 517     dmobject_init(&track->dmobj, &CLSID_DirectMusicStyleTrack,
 518                   (IUnknown *)&track->IDirectMusicTrack8_iface);
 519     track->dmobj.IPersistStream_iface.lpVtbl = &persiststream_vtbl;
 520     list_init (&track->Items);
 521
 522     DMSTYLE_LockModule();
 523     hr = IDirectMusicTrack8_QueryInterface(&track->IDirectMusicTrack8_iface, lpcGUID, ppobj);
 524     IDirectMusicTrack8_Release(&track->IDirectMusicTrack8_iface);
 525
 526     return hr;
 527 }