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   1 /* IDirectMusicTempoTrack Implementation
   2  *
   3  * Copyright (C) 2003-2004 Rok Mandeljc
   4  * Copyright (C) 2004 Raphael Junqueira
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU Lesser General Public
   8  * License as published by the Free Software Foundation; either
   9  * version 2.1 of the License, or (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14  * Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public
  17  * License along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  19  */
  20
  21 #include "dmime_private.h"
  22
  23 WINE_DEFAULT_DEBUG_CHANNEL(dmime);
  24 WINE_DECLARE_DEBUG_CHANNEL(dmfile);
  25
  26 /*****************************************************************************
  27  * IDirectMusicTempoTrack implementation
  28  */
  29 /* IDirectMusicTempoTrack IUnknown part: */
  30 static HRESULT WINAPI IDirectMusicTempoTrack_IUnknown_QueryInterface (LPUNKNOWN iface, REFIID riid, LPVOID *ppobj) {
  31   ICOM_THIS_MULTI(IDirectMusicTempoTrack, UnknownVtbl, iface);
  32   TRACE("(%p, %s, %p)\n", This, debugstr_dmguid(riid), ppobj);
  33
  34   if (IsEqualIID (riid, &IID_IUnknown)) {
  35     *ppobj = &This->UnknownVtbl;
  36     IUnknown_AddRef (iface);
  37     return S_OK;
  38   } else if (IsEqualIID (riid, &IID_IDirectMusicTrack)
  39              || IsEqualIID (riid, &IID_IDirectMusicTrack8)) {
  40     *ppobj = (LPDIRECTMUSICTRACK8)&This->TrackVtbl;
  41     IUnknown_AddRef (iface);
  42     return S_OK;
  43   } else if (IsEqualIID (riid, &IID_IPersistStream)) {
  44     *ppobj = &This->PersistStreamVtbl;
  45     IUnknown_AddRef (iface);
  46     return S_OK;
  47   }
  48
  49   WARN("(%p, %s, %p): not found\n", This, debugstr_dmguid(riid), ppobj);
  50   return E_NOINTERFACE;
  51 }
  52
  53 static ULONG WINAPI IDirectMusicTempoTrack_IUnknown_AddRef (LPUNKNOWN iface) {
  54   ICOM_THIS_MULTI(IDirectMusicTempoTrack, UnknownVtbl, iface);
  55   ULONG ref = InterlockedIncrement(&This->ref);
  56
  57   TRACE("(%p): AddRef from %d\n", This, ref - 1);
  58
  59   DMIME_LockModule();
  60
  61   return ref;
  62 }
  63
  64 static ULONG WINAPI IDirectMusicTempoTrack_IUnknown_Release (LPUNKNOWN iface) {
  65   ICOM_THIS_MULTI(IDirectMusicTempoTrack, UnknownVtbl, iface);
  66   ULONG ref = InterlockedDecrement(&This->ref);
  67   TRACE("(%p): ReleaseRef to %d\n", This, ref);
  68
  69   if (ref == 0) {
  70     HeapFree(GetProcessHeap(), 0, This);
  71   }
  72
  73   DMIME_UnlockModule();
  74
  75   return ref;
  76 }
  77
  78 static const IUnknownVtbl DirectMusicTempoTrack_Unknown_Vtbl = {
  79   IDirectMusicTempoTrack_IUnknown_QueryInterface,
  80   IDirectMusicTempoTrack_IUnknown_AddRef,
  81   IDirectMusicTempoTrack_IUnknown_Release
  82 };
  83
  84 /* IDirectMusicTempoTrack IDirectMusicTrack8 part: */
  85 static HRESULT WINAPI IDirectMusicTempoTrack_IDirectMusicTrack_QueryInterface (LPDIRECTMUSICTRACK8 iface, REFIID riid, LPVOID *ppobj) {
  86   ICOM_THIS_MULTI(IDirectMusicTempoTrack, TrackVtbl, iface);
  87   return IUnknown_QueryInterface ((LPUNKNOWN)&This->UnknownVtbl, riid, ppobj);
  88 }
  89
  90 static ULONG WINAPI IDirectMusicTempoTrack_IDirectMusicTrack_AddRef (LPDIRECTMUSICTRACK8 iface) {
  91   ICOM_THIS_MULTI(IDirectMusicTempoTrack, TrackVtbl, iface);
  92   return IUnknown_AddRef ((LPUNKNOWN)&This->UnknownVtbl);
  93 }
  94
  95 static ULONG WINAPI IDirectMusicTempoTrack_IDirectMusicTrack_Release (LPDIRECTMUSICTRACK8 iface) {
  96   ICOM_THIS_MULTI(IDirectMusicTempoTrack, TrackVtbl, iface);
  97   return IUnknown_Release ((LPUNKNOWN)&This->UnknownVtbl);
  98 }
  99
 100 static HRESULT WINAPI IDirectMusicTempoTrack_IDirectMusicTrack_Init (LPDIRECTMUSICTRACK8 iface, IDirectMusicSegment* pSegment)
 101 {
 102   ICOM_THIS_MULTI(IDirectMusicTempoTrack, TrackVtbl, iface);
 103   TRACE("(%p, %p): nothing to do here\n", This, pSegment);
 104   return S_OK;
 105 }
 106
 107 static HRESULT WINAPI IDirectMusicTempoTrack_IDirectMusicTrack_InitPlay (LPDIRECTMUSICTRACK8 iface, IDirectMusicSegmentState* pSegmentState, IDirectMusicPerformance* pPerformance, void** ppStateData, DWORD dwVirtualTrack8ID, DWORD dwFlags)
 108 {
 109   ICOM_THIS_MULTI(IDirectMusicTempoTrack, TrackVtbl, iface);
 110
 111   LPDMUS_PRIVATE_TEMPO_PLAY_STATE pState = NULL;
 112
 113   FIXME("(%p, %p, %p, %p, %d, %d): semi-stub\n", This, pSegmentState, pPerformance, ppStateData, dwVirtualTrack8ID, dwFlags);
 114
 115   pState = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(DMUS_PRIVATE_TEMPO_PLAY_STATE));
 116   if (NULL == pState) {
 117     ERR(": no more memory\n");
 118     return E_OUTOFMEMORY;
 119   }
 120   /** TODO real fill useful data */
 121   pState->dummy = 0;
 122   *ppStateData = pState;
 123   return S_OK;
 124 }
 125
 126 static HRESULT WINAPI IDirectMusicTempoTrack_IDirectMusicTrack_EndPlay (LPDIRECTMUSICTRACK8 iface, void* pStateData)
 127 {
 128   ICOM_THIS_MULTI(IDirectMusicTempoTrack, TrackVtbl, iface);
 129
 130   LPDMUS_PRIVATE_TEMPO_PLAY_STATE pState = pStateData;
 131
 132   FIXME("(%p, %p): semi-stub\n", This, pStateData);
 133
 134   if (NULL == pStateData) {
 135     return E_POINTER;
 136   }
 137   /** TODO real clean up */
 138   HeapFree(GetProcessHeap(), 0, pState);
 139   return S_OK;
 140 }
 141
 142 static HRESULT WINAPI IDirectMusicTempoTrack_IDirectMusicTrack_Play (LPDIRECTMUSICTRACK8 iface, void* pStateData, MUSIC_TIME mtStart, MUSIC_TIME mtEnd, MUSIC_TIME mtOffset, DWORD dwFlags, IDirectMusicPerformance* pPerf, IDirectMusicSegmentState* pSegSt, DWORD dwVirtualID)
 143 {
 144   ICOM_THIS_MULTI(IDirectMusicTempoTrack, TrackVtbl, iface);
 145   FIXME("(%p, %p, %d, %d, %d, %d, %p, %p, %d): stub\n", This, pStateData, mtStart, mtEnd, mtOffset, dwFlags, pPerf, pSegSt, dwVirtualID);
 146   /** should use IDirectMusicPerformance_SendPMsg here */
 147   return S_OK;
 148 }
 149
 150 static HRESULT WINAPI IDirectMusicTempoTrack_IDirectMusicTrack_GetParam (LPDIRECTMUSICTRACK8 iface, REFGUID rguidType, MUSIC_TIME mtTime, MUSIC_TIME* pmtNext, void* pParam) {
 151   ICOM_THIS_MULTI(IDirectMusicTempoTrack, TrackVtbl, iface);
 152
 153   HRESULT hr = S_OK;
 154   struct list* pEntry = NULL;
 155   LPDMUS_PRIVATE_TEMPO_ITEM pIt = NULL;
 156   DMUS_TEMPO_PARAM* prm = pParam;
 157
 158   FIXME("(%p, %s, %d, %p, %p): almost stub\n", This, debugstr_dmguid(rguidType), mtTime, pmtNext, pParam);
 159
 160   if (NULL == pParam) {
 161     return E_POINTER;
 162   }
 163
 164   hr = IDirectMusicTrack_IsParamSupported (iface, rguidType);
 165   if (FAILED(hr)) {
 166     return hr;
 167   }
 168   if (FALSE == This->enabled) {
 169     return DMUS_E_TYPE_DISABLED;
 170   }
 171
 172   if (NULL != pmtNext) *pmtNext = 0;
 173   prm->mtTime = 0;
 174   prm->dblTempo = 0.123456;
 175
 176   LIST_FOR_EACH (pEntry, &This->Items) {
 177     pIt = LIST_ENTRY(pEntry, DMUS_PRIVATE_TEMPO_ITEM, entry);
 178     /*TRACE(" - %p -> 0x%lx,%p\n", pIt, pIt->item.lTime, pIt->item.dblTempo);*/
 179     if (pIt->item.lTime <= mtTime) {
 180       MUSIC_TIME ofs = pIt->item.lTime - mtTime;
 181       if (ofs > prm->mtTime) {
 182         prm->mtTime = ofs;
 183         prm->dblTempo = pIt->item.dblTempo;
 184       }
 185       if (NULL != pmtNext && pIt->item.lTime > mtTime) {
 186         if (pIt->item.lTime < *pmtNext) {
 187           *pmtNext = pIt->item.lTime;
 188         }
 189       }
 190     }
 191   }
 192
 193   if (0.123456 == prm->dblTempo) {
 194     return DMUS_E_NOT_FOUND;
 195   }
 196   return S_OK;
 197 }
 198
 199 static HRESULT WINAPI IDirectMusicTempoTrack_IDirectMusicTrack_SetParam (LPDIRECTMUSICTRACK8 iface, REFGUID rguidType, MUSIC_TIME mtTime, void* pParam) {
 200         ICOM_THIS_MULTI(IDirectMusicTempoTrack, TrackVtbl, iface);
 201         FIXME("(%p, %s, %d, %p): stub\n", This, debugstr_dmguid(rguidType), mtTime, pParam);
 202         return S_OK;
 203 }
 204
 205 static HRESULT WINAPI IDirectMusicTempoTrack_IDirectMusicTrack_IsParamSupported (LPDIRECTMUSICTRACK8 iface, REFGUID rguidType) {
 206   ICOM_THIS_MULTI(IDirectMusicTempoTrack, TrackVtbl, iface);
 207
 208   TRACE("(%p, %s)\n", This, debugstr_dmguid(rguidType));
 209   if (IsEqualGUID (rguidType, &GUID_DisableTempo)
 210       || IsEqualGUID (rguidType, &GUID_EnableTempo)
 211       || IsEqualGUID (rguidType, &GUID_TempoParam)) {
 212     TRACE("param supported\n");
 213     return S_OK;
 214   }
 215   if (FALSE == This->enabled) {
 216     return DMUS_E_TYPE_DISABLED;
 217   }
 218   TRACE("param unsupported\n");
 219   return DMUS_E_TYPE_UNSUPPORTED;
 220 }
 221
 222 static HRESULT WINAPI IDirectMusicTempoTrack_IDirectMusicTrack_AddNotificationType (LPDIRECTMUSICTRACK8 iface, REFGUID rguidNotificationType) {
 223   ICOM_THIS_MULTI(IDirectMusicTempoTrack, TrackVtbl, iface);
 224   FIXME("(%p, %s): stub\n", This, debugstr_dmguid(rguidNotificationType));
 225   return S_OK;
 226 }
 227
 228 static HRESULT WINAPI IDirectMusicTempoTrack_IDirectMusicTrack_RemoveNotificationType (LPDIRECTMUSICTRACK8 iface, REFGUID rguidNotificationType) {
 229   ICOM_THIS_MULTI(IDirectMusicTempoTrack, TrackVtbl, iface);
 230   FIXME("(%p, %s): stub\n", This, debugstr_dmguid(rguidNotificationType));
 231   return S_OK;
 232 }
 233
 234 static HRESULT WINAPI IDirectMusicTempoTrack_IDirectMusicTrack_Clone (LPDIRECTMUSICTRACK8 iface, MUSIC_TIME mtStart, MUSIC_TIME mtEnd, IDirectMusicTrack** ppTrack) {
 235   ICOM_THIS_MULTI(IDirectMusicTempoTrack, TrackVtbl, iface);
 236   FIXME("(%p, %d, %d, %p): stub\n", This, mtStart, mtEnd, ppTrack);
 237   return S_OK;
 238 }
 239
 240 static HRESULT WINAPI IDirectMusicTempoTrack_IDirectMusicTrack_PlayEx (LPDIRECTMUSICTRACK8 iface, void* pStateData, REFERENCE_TIME rtStart, REFERENCE_TIME rtEnd, REFERENCE_TIME rtOffset, DWORD dwFlags, IDirectMusicPerformance* pPerf, IDirectMusicSegmentState* pSegSt, DWORD dwVirtualID) {
 241   ICOM_THIS_MULTI(IDirectMusicTempoTrack, TrackVtbl, iface);
 242   FIXME("(%p, %p, 0x%s, 0x%s, 0x%s, %d, %p, %p, %d): stub\n", This, pStateData, wine_dbgstr_longlong(rtStart),
 243       wine_dbgstr_longlong(rtEnd), wine_dbgstr_longlong(rtOffset), dwFlags, pPerf, pSegSt, dwVirtualID);
 244   return S_OK;
 245 }
 246
 247 static HRESULT WINAPI IDirectMusicTempoTrack_IDirectMusicTrack_GetParamEx (LPDIRECTMUSICTRACK8 iface, REFGUID rguidType, REFERENCE_TIME rtTime, REFERENCE_TIME* prtNext, void* pParam, void* pStateData, DWORD dwFlags) {
 248   ICOM_THIS_MULTI(IDirectMusicTempoTrack, TrackVtbl, iface);
 249   FIXME("(%p, %s, 0x%s, %p, %p, %p, %d): stub\n", This, debugstr_dmguid(rguidType),
 250       wine_dbgstr_longlong(rtTime), prtNext, pParam, pStateData, dwFlags);
 251   return S_OK;
 252 }
 253
 254 static HRESULT WINAPI IDirectMusicTempoTrack_IDirectMusicTrack_SetParamEx (LPDIRECTMUSICTRACK8 iface, REFGUID rguidType, REFERENCE_TIME rtTime, void* pParam, void* pStateData, DWORD dwFlags) {
 255   ICOM_THIS_MULTI(IDirectMusicTempoTrack, TrackVtbl, iface);
 256   FIXME("(%p, %s, 0x%s, %p, %p, %d): stub\n", This, debugstr_dmguid(rguidType),
 257       wine_dbgstr_longlong(rtTime), pParam, pStateData, dwFlags);
 258   return S_OK;
 259 }
 260
 261 static HRESULT WINAPI IDirectMusicTempoTrack_IDirectMusicTrack_Compose (LPDIRECTMUSICTRACK8 iface, IUnknown* pContext, DWORD dwTrackGroup, IDirectMusicTrack** ppResultTrack) {
 262   ICOM_THIS_MULTI(IDirectMusicTempoTrack, TrackVtbl, iface);
 263   FIXME("(%p, %p, %d, %p): stub\n", This, pContext, dwTrackGroup, ppResultTrack);
 264   return S_OK;
 265 }
 266
 267 static HRESULT WINAPI IDirectMusicTempoTrack_IDirectMusicTrack_Join (LPDIRECTMUSICTRACK8 iface, IDirectMusicTrack* pNewTrack, MUSIC_TIME mtJoin, IUnknown* pContext, DWORD dwTrackGroup, IDirectMusicTrack** ppResultTrack) {
 268   ICOM_THIS_MULTI(IDirectMusicTempoTrack, TrackVtbl, iface);
 269   FIXME("(%p, %p, %d, %p, %d, %p): stub\n", This, pNewTrack, mtJoin, pContext, dwTrackGroup, ppResultTrack);
 270   return S_OK;
 271 }
 272
 273 static const IDirectMusicTrack8Vtbl DirectMusicTempoTrack_Track_Vtbl = {
 274   IDirectMusicTempoTrack_IDirectMusicTrack_QueryInterface,
 275   IDirectMusicTempoTrack_IDirectMusicTrack_AddRef,
 276   IDirectMusicTempoTrack_IDirectMusicTrack_Release,
 277   IDirectMusicTempoTrack_IDirectMusicTrack_Init,
 278   IDirectMusicTempoTrack_IDirectMusicTrack_InitPlay,
 279   IDirectMusicTempoTrack_IDirectMusicTrack_EndPlay,
 280   IDirectMusicTempoTrack_IDirectMusicTrack_Play,
 281   IDirectMusicTempoTrack_IDirectMusicTrack_GetParam,
 282   IDirectMusicTempoTrack_IDirectMusicTrack_SetParam,
 283   IDirectMusicTempoTrack_IDirectMusicTrack_IsParamSupported,
 284   IDirectMusicTempoTrack_IDirectMusicTrack_AddNotificationType,
 285   IDirectMusicTempoTrack_IDirectMusicTrack_RemoveNotificationType,
 286   IDirectMusicTempoTrack_IDirectMusicTrack_Clone,
 287   IDirectMusicTempoTrack_IDirectMusicTrack_PlayEx,
 288   IDirectMusicTempoTrack_IDirectMusicTrack_GetParamEx,
 289   IDirectMusicTempoTrack_IDirectMusicTrack_SetParamEx,
 290   IDirectMusicTempoTrack_IDirectMusicTrack_Compose,
 291   IDirectMusicTempoTrack_IDirectMusicTrack_Join
 292 };
 293
 294 /* IDirectMusicTempoTrack IPersistStream part: */
 295 static HRESULT WINAPI IDirectMusicTempoTrack_IPersistStream_QueryInterface (LPPERSISTSTREAM iface, REFIID riid, LPVOID *ppobj) {
 296   ICOM_THIS_MULTI(IDirectMusicTempoTrack, PersistStreamVtbl, iface);
 297   return IUnknown_QueryInterface ((LPUNKNOWN)&This->UnknownVtbl, riid, ppobj);
 298 }
 299
 300 static ULONG WINAPI IDirectMusicTempoTrack_IPersistStream_AddRef (LPPERSISTSTREAM iface) {
 301   ICOM_THIS_MULTI(IDirectMusicTempoTrack, PersistStreamVtbl, iface);
 302   return IUnknown_AddRef ((LPUNKNOWN)&This->UnknownVtbl);
 303 }
 304
 305 static ULONG WINAPI IDirectMusicTempoTrack_IPersistStream_Release (LPPERSISTSTREAM iface) {
 306   ICOM_THIS_MULTI(IDirectMusicTempoTrack, PersistStreamVtbl, iface);
 307   return IUnknown_Release ((LPUNKNOWN)&This->UnknownVtbl);
 308 }
 309
 310 static HRESULT WINAPI IDirectMusicTempoTrack_IPersistStream_GetClassID (LPPERSISTSTREAM iface, CLSID* pClassID) {
 311   ICOM_THIS_MULTI(IDirectMusicSegment8Impl, PersistStreamVtbl, iface);
 312   TRACE("(%p, %p)\n", This, pClassID);
 313   *pClassID = CLSID_DirectMusicTempoTrack;
 314   return S_OK;
 315 }
 316
 317 static HRESULT WINAPI IDirectMusicTempoTrack_IPersistStream_IsDirty (LPPERSISTSTREAM iface) {
 318   ICOM_THIS_MULTI(IDirectMusicTempoTrack, PersistStreamVtbl, iface);
 319   FIXME("(%p): stub, always S_FALSE\n", This);
 320   return S_FALSE;
 321 }
 322
 323 static HRESULT WINAPI IDirectMusicTempoTrack_IPersistStream_Load (LPPERSISTSTREAM iface, IStream* pStm) {
 324   ICOM_THIS_MULTI(IDirectMusicTempoTrack, PersistStreamVtbl, iface);
 325   DMUS_PRIVATE_CHUNK Chunk;
 326   DWORD StreamSize, StreamCount;
 327   LARGE_INTEGER liMove;
 328   DMUS_IO_TEMPO_ITEM item;
 329   LPDMUS_PRIVATE_TEMPO_ITEM pNewItem = NULL;
 330   DWORD nItem = 0;
 331   FIXME("(%p, %p): Loading not fully implemented yet\n", This, pStm);
 332
 333 #if 1
 334   IStream_Read (pStm, &Chunk, sizeof(FOURCC)+sizeof(DWORD), NULL);
 335   TRACE_(dmfile)(": %s chunk (size = %d)", debugstr_fourcc (Chunk.fccID), Chunk.dwSize);
 336   switch (Chunk.fccID) {
 337   case DMUS_FOURCC_TEMPO_TRACK: {
 338     TRACE_(dmfile)(": Tempo track\n");
 339 #if 1
 340     IStream_Read (pStm, &StreamSize, sizeof(DWORD), NULL);
 341     StreamSize -= sizeof(DWORD);
 342     StreamCount = 0;
 343     TRACE_(dmfile)(" - sizeof(DMUS_IO_TEMPO_ITEM): %u (chunkSize = %u)\n", StreamSize, Chunk.dwSize);
 344     do {
 345       IStream_Read (pStm, &item, sizeof(item), NULL);
 346       ++nItem;
 347       TRACE_(dmfile)("DMUS_IO_TEMPO_ITEM #%d\n", nItem);
 348       TRACE_(dmfile)(" - lTime = %u\n", item.lTime);
 349       TRACE_(dmfile)(" - dblTempo = %g\n", item.dblTempo);
 350       pNewItem = HeapAlloc (GetProcessHeap (), HEAP_ZERO_MEMORY, sizeof(DMUS_PRIVATE_TEMPO_ITEM));
 351       if (NULL == pNewItem) {
 352         ERR(": no more memory\n");
 353         return  E_OUTOFMEMORY;
 354       }
 355       pNewItem->item = item;
 356       list_add_tail (&This->Items, &pNewItem->entry);
 357       pNewItem = NULL;
 358       StreamCount += sizeof(item);
 359       TRACE_(dmfile)(": StreamCount[0] = %d < StreamSize[0] = %d\n", StreamCount, StreamSize);
 360     } while (StreamCount < StreamSize);
 361 #else
 362     liMove.QuadPart = Chunk.dwSize;
 363     IStream_Seek (pStm, liMove, STREAM_SEEK_CUR, NULL);
 364 #endif
 365     break;
 366   }
 367   default: {
 368     TRACE_(dmfile)(": unexpected chunk; loading failed)\n");
 369     liMove.QuadPart = Chunk.dwSize;
 370     IStream_Seek (pStm, liMove, STREAM_SEEK_CUR, NULL);
 371     return E_FAIL;
 372   }
 373   }
 374 #endif
 375
 376   return S_OK;
 377 }
 378
 379 static HRESULT WINAPI IDirectMusicTempoTrack_IPersistStream_Save (LPPERSISTSTREAM iface, IStream* pStm, BOOL fClearDirty) {
 380   ICOM_THIS_MULTI(IDirectMusicTempoTrack, PersistStreamVtbl, iface);
 381   FIXME("(%p): Saving not implemented yet\n", This);
 382   return E_NOTIMPL;
 383 }
 384
 385 static HRESULT WINAPI IDirectMusicTempoTrack_IPersistStream_GetSizeMax (LPPERSISTSTREAM iface, ULARGE_INTEGER* pcbSize) {
 386   ICOM_THIS_MULTI(IDirectMusicTempoTrack, PersistStreamVtbl, iface);
 387   FIXME("(%p, %p): stub\n", This, pcbSize);
 388   return E_NOTIMPL;
 389 }
 390
 391 static const IPersistStreamVtbl DirectMusicTempoTrack_PersistStream_Vtbl = {
 392   IDirectMusicTempoTrack_IPersistStream_QueryInterface,
 393   IDirectMusicTempoTrack_IPersistStream_AddRef,
 394   IDirectMusicTempoTrack_IPersistStream_Release,
 395   IDirectMusicTempoTrack_IPersistStream_GetClassID,
 396   IDirectMusicTempoTrack_IPersistStream_IsDirty,
 397   IDirectMusicTempoTrack_IPersistStream_Load,
 398   IDirectMusicTempoTrack_IPersistStream_Save,
 399   IDirectMusicTempoTrack_IPersistStream_GetSizeMax
 400 };
 401
 402 /* for ClassFactory */
 403 HRESULT WINAPI DMUSIC_CreateDirectMusicTempoTrack (LPCGUID lpcGUID, LPVOID *ppobj, LPUNKNOWN pUnkOuter) {
 404   IDirectMusicTempoTrack* track;
 405
 406   track = HeapAlloc (GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(IDirectMusicTempoTrack));
 407   if (NULL == track) {
 408     *ppobj = NULL;
 409     return E_OUTOFMEMORY;
 410   }
 411   track->UnknownVtbl = &DirectMusicTempoTrack_Unknown_Vtbl;
 412   track->TrackVtbl = &DirectMusicTempoTrack_Track_Vtbl;
 413   track->PersistStreamVtbl = &DirectMusicTempoTrack_PersistStream_Vtbl;
 414   track->pDesc = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(DMUS_OBJECTDESC));
 415   DM_STRUCT_INIT(track->pDesc);
 416   track->pDesc->dwValidData |= DMUS_OBJ_CLASS;
 417   track->pDesc->guidClass = CLSID_DirectMusicTempoTrack;
 418   track->ref = 0; /* will be inited by QueryInterface */
 419   track->enabled = TRUE;
 420   list_init (&track->Items);
 421
 422   return IDirectMusicTempoTrack_IUnknown_QueryInterface ((LPUNKNOWN)&track->UnknownVtbl, lpcGUID, ppobj);
 423 }