dlls/dmime/tempotrack.c

   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     return E_OUTOFMEMORY;
 118
 119   /** TODO real fill useful data */
 120   pState->dummy = 0;
 121   *ppStateData = pState;
 122   return S_OK;
 123 }
 124
 125 static HRESULT WINAPI IDirectMusicTempoTrack_IDirectMusicTrack_EndPlay (LPDIRECTMUSICTRACK8 iface, void* pStateData)
 126 {
 127   ICOM_THIS_MULTI(IDirectMusicTempoTrack, TrackVtbl, iface);
 128
 129   LPDMUS_PRIVATE_TEMPO_PLAY_STATE pState = pStateData;
 130
 131   FIXME("(%p, %p): semi-stub\n", This, pStateData);
 132
 133   if (NULL == pStateData) {
 134     return E_POINTER;
 135   }
 136   /** TODO real clean up */
 137   HeapFree(GetProcessHeap(), 0, pState);
 138   return S_OK;
 139 }
 140
 141 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)
 142 {
 143   ICOM_THIS_MULTI(IDirectMusicTempoTrack, TrackVtbl, iface);
 144   FIXME("(%p, %p, %d, %d, %d, %d, %p, %p, %d): stub\n", This, pStateData, mtStart, mtEnd, mtOffset, dwFlags, pPerf, pSegSt, dwVirtualID);
 145   /** should use IDirectMusicPerformance_SendPMsg here */
 146   return S_OK;
 147 }
 148
 149 static HRESULT WINAPI IDirectMusicTempoTrack_IDirectMusicTrack_GetParam (LPDIRECTMUSICTRACK8 iface, REFGUID rguidType, MUSIC_TIME mtTime, MUSIC_TIME* pmtNext, void* pParam) {
 150   ICOM_THIS_MULTI(IDirectMusicTempoTrack, TrackVtbl, iface);
 151
 152   HRESULT hr = S_OK;
 153   struct list* pEntry = NULL;
 154   LPDMUS_PRIVATE_TEMPO_ITEM pIt = NULL;
 155   DMUS_TEMPO_PARAM* prm = pParam;
 156
 157   FIXME("(%p, %s, %d, %p, %p): almost stub\n", This, debugstr_dmguid(rguidType), mtTime, pmtNext, pParam);
 158
 159   if (NULL == pParam) {
 160     return E_POINTER;
 161   }
 162
 163   hr = IDirectMusicTrack_IsParamSupported (iface, rguidType);
 164   if (FAILED(hr)) {
 165     return hr;
 166   }
 167   if (FALSE == This->enabled) {
 168     return DMUS_E_TYPE_DISABLED;
 169   }
 170
 171   if (NULL != pmtNext) *pmtNext = 0;
 172   prm->mtTime = 0;
 173   prm->dblTempo = 0.123456;
 174
 175   LIST_FOR_EACH (pEntry, &This->Items) {
 176     pIt = LIST_ENTRY(pEntry, DMUS_PRIVATE_TEMPO_ITEM, entry);
 177     /*TRACE(" - %p -> 0x%lx,%p\n", pIt, pIt->item.lTime, pIt->item.dblTempo);*/
 178     if (pIt->item.lTime <= mtTime) {
 179       MUSIC_TIME ofs = pIt->item.lTime - mtTime;
 180       if (ofs > prm->mtTime) {
 181         prm->mtTime = ofs;
 182         prm->dblTempo = pIt->item.dblTempo;
 183       }
 184       if (NULL != pmtNext && pIt->item.lTime > mtTime) {
 185         if (pIt->item.lTime < *pmtNext) {
 186           *pmtNext = pIt->item.lTime;
 187         }
 188       }
 189     }
 190   }
 191
 192   if (0.123456 == prm->dblTempo) {
 193     return DMUS_E_NOT_FOUND;
 194   }
 195   return S_OK;
 196 }
 197
 198 static HRESULT WINAPI IDirectMusicTempoTrack_IDirectMusicTrack_SetParam (LPDIRECTMUSICTRACK8 iface, REFGUID rguidType, MUSIC_TIME mtTime, void* pParam) {
 199         ICOM_THIS_MULTI(IDirectMusicTempoTrack, TrackVtbl, iface);
 200         FIXME("(%p, %s, %d, %p): stub\n", This, debugstr_dmguid(rguidType), mtTime, pParam);
 201         return S_OK;
 202 }
 203
 204 static HRESULT WINAPI IDirectMusicTempoTrack_IDirectMusicTrack_IsParamSupported (LPDIRECTMUSICTRACK8 iface, REFGUID rguidType) {
 205   ICOM_THIS_MULTI(IDirectMusicTempoTrack, TrackVtbl, iface);
 206
 207   TRACE("(%p, %s)\n", This, debugstr_dmguid(rguidType));
 208   if (IsEqualGUID (rguidType, &GUID_DisableTempo)
 209       || IsEqualGUID (rguidType, &GUID_EnableTempo)
 210       || IsEqualGUID (rguidType, &GUID_TempoParam)) {
 211     TRACE("param supported\n");
 212     return S_OK;
 213   }
 214   if (FALSE == This->enabled) {
 215     return DMUS_E_TYPE_DISABLED;
 216   }
 217   TRACE("param unsupported\n");
 218   return DMUS_E_TYPE_UNSUPPORTED;
 219 }
 220
 221 static HRESULT WINAPI IDirectMusicTempoTrack_IDirectMusicTrack_AddNotificationType (LPDIRECTMUSICTRACK8 iface, REFGUID rguidNotificationType) {
 222   ICOM_THIS_MULTI(IDirectMusicTempoTrack, TrackVtbl, iface);
 223   FIXME("(%p, %s): stub\n", This, debugstr_dmguid(rguidNotificationType));
 224   return S_OK;
 225 }
 226
 227 static HRESULT WINAPI IDirectMusicTempoTrack_IDirectMusicTrack_RemoveNotificationType (LPDIRECTMUSICTRACK8 iface, REFGUID rguidNotificationType) {
 228   ICOM_THIS_MULTI(IDirectMusicTempoTrack, TrackVtbl, iface);
 229   FIXME("(%p, %s): stub\n", This, debugstr_dmguid(rguidNotificationType));
 230   return S_OK;
 231 }
 232
 233 static HRESULT WINAPI IDirectMusicTempoTrack_IDirectMusicTrack_Clone (LPDIRECTMUSICTRACK8 iface, MUSIC_TIME mtStart, MUSIC_TIME mtEnd, IDirectMusicTrack** ppTrack) {
 234   ICOM_THIS_MULTI(IDirectMusicTempoTrack, TrackVtbl, iface);
 235   FIXME("(%p, %d, %d, %p): stub\n", This, mtStart, mtEnd, ppTrack);
 236   return S_OK;
 237 }
 238
 239 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) {
 240   ICOM_THIS_MULTI(IDirectMusicTempoTrack, TrackVtbl, iface);
 241   FIXME("(%p, %p, 0x%s, 0x%s, 0x%s, %d, %p, %p, %d): stub\n", This, pStateData, wine_dbgstr_longlong(rtStart),
 242       wine_dbgstr_longlong(rtEnd), wine_dbgstr_longlong(rtOffset), dwFlags, pPerf, pSegSt, dwVirtualID);
 243   return S_OK;
 244 }
 245
 246 static HRESULT WINAPI IDirectMusicTempoTrack_IDirectMusicTrack_GetParamEx (LPDIRECTMUSICTRACK8 iface, REFGUID rguidType, REFERENCE_TIME rtTime, REFERENCE_TIME* prtNext, void* pParam, void* pStateData, DWORD dwFlags) {
 247   ICOM_THIS_MULTI(IDirectMusicTempoTrack, TrackVtbl, iface);
 248   FIXME("(%p, %s, 0x%s, %p, %p, %p, %d): stub\n", This, debugstr_dmguid(rguidType),
 249       wine_dbgstr_longlong(rtTime), prtNext, pParam, pStateData, dwFlags);
 250   return S_OK;
 251 }
 252
 253 static HRESULT WINAPI IDirectMusicTempoTrack_IDirectMusicTrack_SetParamEx (LPDIRECTMUSICTRACK8 iface, REFGUID rguidType, REFERENCE_TIME rtTime, void* pParam, void* pStateData, DWORD dwFlags) {
 254   ICOM_THIS_MULTI(IDirectMusicTempoTrack, TrackVtbl, iface);
 255   FIXME("(%p, %s, 0x%s, %p, %p, %d): stub\n", This, debugstr_dmguid(rguidType),
 256       wine_dbgstr_longlong(rtTime), pParam, pStateData, dwFlags);
 257   return S_OK;
 258 }
 259
 260 static HRESULT WINAPI IDirectMusicTempoTrack_IDirectMusicTrack_Compose (LPDIRECTMUSICTRACK8 iface, IUnknown* pContext, DWORD dwTrackGroup, IDirectMusicTrack** ppResultTrack) {
 261   ICOM_THIS_MULTI(IDirectMusicTempoTrack, TrackVtbl, iface);
 262   FIXME("(%p, %p, %d, %p): stub\n", This, pContext, dwTrackGroup, ppResultTrack);
 263   return S_OK;
 264 }
 265
 266 static HRESULT WINAPI IDirectMusicTempoTrack_IDirectMusicTrack_Join (LPDIRECTMUSICTRACK8 iface, IDirectMusicTrack* pNewTrack, MUSIC_TIME mtJoin, IUnknown* pContext, DWORD dwTrackGroup, IDirectMusicTrack** ppResultTrack) {
 267   ICOM_THIS_MULTI(IDirectMusicTempoTrack, TrackVtbl, iface);
 268   FIXME("(%p, %p, %d, %p, %d, %p): stub\n", This, pNewTrack, mtJoin, pContext, dwTrackGroup, ppResultTrack);
 269   return S_OK;
 270 }
 271
 272 static const IDirectMusicTrack8Vtbl DirectMusicTempoTrack_Track_Vtbl = {
 273   IDirectMusicTempoTrack_IDirectMusicTrack_QueryInterface,
 274   IDirectMusicTempoTrack_IDirectMusicTrack_AddRef,
 275   IDirectMusicTempoTrack_IDirectMusicTrack_Release,
 276   IDirectMusicTempoTrack_IDirectMusicTrack_Init,
 277   IDirectMusicTempoTrack_IDirectMusicTrack_InitPlay,
 278   IDirectMusicTempoTrack_IDirectMusicTrack_EndPlay,
 279   IDirectMusicTempoTrack_IDirectMusicTrack_Play,
 280   IDirectMusicTempoTrack_IDirectMusicTrack_GetParam,
 281   IDirectMusicTempoTrack_IDirectMusicTrack_SetParam,
 282   IDirectMusicTempoTrack_IDirectMusicTrack_IsParamSupported,
 283   IDirectMusicTempoTrack_IDirectMusicTrack_AddNotificationType,
 284   IDirectMusicTempoTrack_IDirectMusicTrack_RemoveNotificationType,
 285   IDirectMusicTempoTrack_IDirectMusicTrack_Clone,
 286   IDirectMusicTempoTrack_IDirectMusicTrack_PlayEx,
 287   IDirectMusicTempoTrack_IDirectMusicTrack_GetParamEx,
 288   IDirectMusicTempoTrack_IDirectMusicTrack_SetParamEx,
 289   IDirectMusicTempoTrack_IDirectMusicTrack_Compose,
 290   IDirectMusicTempoTrack_IDirectMusicTrack_Join
 291 };
 292
 293 /* IDirectMusicTempoTrack IPersistStream part: */
 294 static HRESULT WINAPI IDirectMusicTempoTrack_IPersistStream_QueryInterface (LPPERSISTSTREAM iface, REFIID riid, LPVOID *ppobj) {
 295   ICOM_THIS_MULTI(IDirectMusicTempoTrack, PersistStreamVtbl, iface);
 296   return IUnknown_QueryInterface ((LPUNKNOWN)&This->UnknownVtbl, riid, ppobj);
 297 }
 298
 299 static ULONG WINAPI IDirectMusicTempoTrack_IPersistStream_AddRef (LPPERSISTSTREAM iface) {
 300   ICOM_THIS_MULTI(IDirectMusicTempoTrack, PersistStreamVtbl, iface);
 301   return IUnknown_AddRef ((LPUNKNOWN)&This->UnknownVtbl);
 302 }
 303
 304 static ULONG WINAPI IDirectMusicTempoTrack_IPersistStream_Release (LPPERSISTSTREAM iface) {
 305   ICOM_THIS_MULTI(IDirectMusicTempoTrack, PersistStreamVtbl, iface);
 306   return IUnknown_Release ((LPUNKNOWN)&This->UnknownVtbl);
 307 }
 308
 309 static HRESULT WINAPI IDirectMusicTempoTrack_IPersistStream_GetClassID (LPPERSISTSTREAM iface, CLSID* pClassID) {
 310   ICOM_THIS_MULTI(IDirectMusicSegment8Impl, PersistStreamVtbl, iface);
 311   TRACE("(%p, %p)\n", This, pClassID);
 312   *pClassID = CLSID_DirectMusicTempoTrack;
 313   return S_OK;
 314 }
 315
 316 static HRESULT WINAPI IDirectMusicTempoTrack_IPersistStream_IsDirty (LPPERSISTSTREAM iface) {
 317   ICOM_THIS_MULTI(IDirectMusicTempoTrack, PersistStreamVtbl, iface);
 318   FIXME("(%p): stub, always S_FALSE\n", This);
 319   return S_FALSE;
 320 }
 321
 322 static HRESULT WINAPI IDirectMusicTempoTrack_IPersistStream_Load (LPPERSISTSTREAM iface, IStream* pStm) {
 323   ICOM_THIS_MULTI(IDirectMusicTempoTrack, PersistStreamVtbl, iface);
 324   DMUS_PRIVATE_CHUNK Chunk;
 325   DWORD StreamSize, StreamCount;
 326   LARGE_INTEGER liMove;
 327   DMUS_IO_TEMPO_ITEM item;
 328   LPDMUS_PRIVATE_TEMPO_ITEM pNewItem = NULL;
 329   DWORD nItem = 0;
 330   FIXME("(%p, %p): Loading not fully implemented yet\n", This, pStm);
 331
 332 #if 1
 333   IStream_Read (pStm, &Chunk, sizeof(FOURCC)+sizeof(DWORD), NULL);
 334   TRACE_(dmfile)(": %s chunk (size = %d)", debugstr_fourcc (Chunk.fccID), Chunk.dwSize);
 335   switch (Chunk.fccID) {
 336   case DMUS_FOURCC_TEMPO_TRACK: {
 337     TRACE_(dmfile)(": Tempo track\n");
 338 #if 1
 339     IStream_Read (pStm, &StreamSize, sizeof(DWORD), NULL);
 340     StreamSize -= sizeof(DWORD);
 341     StreamCount = 0;
 342     TRACE_(dmfile)(" - sizeof(DMUS_IO_TEMPO_ITEM): %u (chunkSize = %u)\n", StreamSize, Chunk.dwSize);
 343     do {
 344       IStream_Read (pStm, &item, sizeof(item), NULL);
 345       ++nItem;
 346       TRACE_(dmfile)("DMUS_IO_TEMPO_ITEM #%d\n", nItem);
 347       TRACE_(dmfile)(" - lTime = %u\n", item.lTime);
 348       TRACE_(dmfile)(" - dblTempo = %g\n", item.dblTempo);
 349       pNewItem = HeapAlloc (GetProcessHeap (), HEAP_ZERO_MEMORY, sizeof(DMUS_PRIVATE_TEMPO_ITEM));
 350       if (NULL == pNewItem)
 351         return  E_OUTOFMEMORY;
 352
 353       pNewItem->item = item;
 354       list_add_tail (&This->Items, &pNewItem->entry);
 355       pNewItem = NULL;
 356       StreamCount += sizeof(item);
 357       TRACE_(dmfile)(": StreamCount[0] = %d < StreamSize[0] = %d\n", StreamCount, StreamSize);
 358     } while (StreamCount < StreamSize);
 359 #else
 360     liMove.QuadPart = Chunk.dwSize;
 361     IStream_Seek (pStm, liMove, STREAM_SEEK_CUR, NULL);
 362 #endif
 363     break;
 364   }
 365   default: {
 366     TRACE_(dmfile)(": unexpected chunk; loading failed)\n");
 367     liMove.QuadPart = Chunk.dwSize;
 368     IStream_Seek (pStm, liMove, STREAM_SEEK_CUR, NULL);
 369     return E_FAIL;
 370   }
 371   }
 372 #endif
 373
 374   return S_OK;
 375 }
 376
 377 static HRESULT WINAPI IDirectMusicTempoTrack_IPersistStream_Save (LPPERSISTSTREAM iface, IStream* pStm, BOOL fClearDirty) {
 378   ICOM_THIS_MULTI(IDirectMusicTempoTrack, PersistStreamVtbl, iface);
 379   FIXME("(%p): Saving not implemented yet\n", This);
 380   return E_NOTIMPL;
 381 }
 382
 383 static HRESULT WINAPI IDirectMusicTempoTrack_IPersistStream_GetSizeMax (LPPERSISTSTREAM iface, ULARGE_INTEGER* pcbSize) {
 384   ICOM_THIS_MULTI(IDirectMusicTempoTrack, PersistStreamVtbl, iface);
 385   FIXME("(%p, %p): stub\n", This, pcbSize);
 386   return E_NOTIMPL;
 387 }
 388
 389 static const IPersistStreamVtbl DirectMusicTempoTrack_PersistStream_Vtbl = {
 390   IDirectMusicTempoTrack_IPersistStream_QueryInterface,
 391   IDirectMusicTempoTrack_IPersistStream_AddRef,
 392   IDirectMusicTempoTrack_IPersistStream_Release,
 393   IDirectMusicTempoTrack_IPersistStream_GetClassID,
 394   IDirectMusicTempoTrack_IPersistStream_IsDirty,
 395   IDirectMusicTempoTrack_IPersistStream_Load,
 396   IDirectMusicTempoTrack_IPersistStream_Save,
 397   IDirectMusicTempoTrack_IPersistStream_GetSizeMax
 398 };
 399
 400 /* for ClassFactory */
 401 HRESULT WINAPI DMUSIC_CreateDirectMusicTempoTrack (LPCGUID lpcGUID, LPVOID *ppobj, LPUNKNOWN pUnkOuter) {
 402   IDirectMusicTempoTrack* track;
 403
 404   track = HeapAlloc (GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(IDirectMusicTempoTrack));
 405   if (NULL == track) {
 406     *ppobj = NULL;
 407     return E_OUTOFMEMORY;
 408   }
 409   track->UnknownVtbl = &DirectMusicTempoTrack_Unknown_Vtbl;
 410   track->TrackVtbl = &DirectMusicTempoTrack_Track_Vtbl;
 411   track->PersistStreamVtbl = &DirectMusicTempoTrack_PersistStream_Vtbl;
 412   track->pDesc = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(DMUS_OBJECTDESC));
 413   DM_STRUCT_INIT(track->pDesc);
 414   track->pDesc->dwValidData |= DMUS_OBJ_CLASS;
 415   track->pDesc->guidClass = CLSID_DirectMusicTempoTrack;
 416   track->ref = 0; /* will be inited by QueryInterface */
 417   track->enabled = TRUE;
 418   list_init (&track->Items);
 419
 420   return IDirectMusicTempoTrack_IUnknown_QueryInterface ((LPUNKNOWN)&track->UnknownVtbl, lpcGUID, ppobj);
 421 }