dlls/dmband/band.c

   1 /* IDirectMusicBand 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 "dmband_private.h"
  21 #include "dmobject.h"
  22
  23 WINE_DEFAULT_DEBUG_CHANNEL(dmband);
  24 WINE_DECLARE_DEBUG_CHANNEL(dmfile);
  25
  26
  27 /*****************************************************************************
  28  * IDirectMusicBandImpl implementation
  29  */
  30 typedef struct IDirectMusicBandImpl {
  31     IDirectMusicBand IDirectMusicBand_iface;
  32     struct dmobject dmobj;
  33     LONG ref;
  34     struct list Instruments;
  35 } IDirectMusicBandImpl;
  36
  37 static inline IDirectMusicBandImpl *impl_from_IDirectMusicBand(IDirectMusicBand *iface)
  38 {
  39     return CONTAINING_RECORD(iface, IDirectMusicBandImpl, IDirectMusicBand_iface);
  40 }
  41
  42 /* DirectMusicBandImpl IDirectMusicBand part: */
  43 static HRESULT WINAPI IDirectMusicBandImpl_QueryInterface(IDirectMusicBand *iface, REFIID riid,
  44         void **ret_iface)
  45 {
  46     IDirectMusicBandImpl *This = impl_from_IDirectMusicBand(iface);
  47
  48     TRACE("(%p, %s, %p)\n", This, debugstr_dmguid(riid), ret_iface);
  49
  50     *ret_iface = NULL;
  51
  52     if (IsEqualIID(riid, &IID_IUnknown) || IsEqualIID(riid, &IID_IDirectMusicBand))
  53         *ret_iface = iface;
  54     else if (IsEqualIID(riid, &IID_IDirectMusicObject))
  55         *ret_iface = &This->dmobj.IDirectMusicObject_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     IDirectMusicBand_AddRef((IUnknown*)*ret_iface);
  64     return S_OK;
  65 }
  66
  67 static ULONG WINAPI IDirectMusicBandImpl_AddRef(IDirectMusicBand *iface)
  68 {
  69     IDirectMusicBandImpl *This = impl_from_IDirectMusicBand(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 IDirectMusicBandImpl_Release(IDirectMusicBand *iface)
  78 {
  79     IDirectMusicBandImpl *This = impl_from_IDirectMusicBand(iface);
  80     LONG ref = InterlockedDecrement(&This->ref);
  81
  82     TRACE("(%p) ref=%d\n", This, ref);
  83
  84     if (!ref) {
  85         HeapFree(GetProcessHeap(), 0, This);
  86         DMBAND_UnlockModule();
  87     }
  88
  89     return ref;
  90 }
  91
  92 static HRESULT WINAPI IDirectMusicBandImpl_CreateSegment(IDirectMusicBand *iface,
  93         IDirectMusicSegment **ppSegment)
  94 {
  95         IDirectMusicBandImpl *This = impl_from_IDirectMusicBand(iface);
  96         FIXME("(%p, %p): stub\n", This, ppSegment);
  97         return S_OK;
  98 }
  99
 100 static HRESULT WINAPI IDirectMusicBandImpl_Download(IDirectMusicBand *iface,
 101         IDirectMusicPerformance *pPerformance)
 102 {
 103         IDirectMusicBandImpl *This = impl_from_IDirectMusicBand(iface);
 104         FIXME("(%p, %p): stub\n", This, pPerformance);
 105         return S_OK;
 106 }
 107
 108 static HRESULT WINAPI IDirectMusicBandImpl_Unload(IDirectMusicBand *iface,
 109         IDirectMusicPerformance *pPerformance)
 110 {
 111         IDirectMusicBandImpl *This = impl_from_IDirectMusicBand(iface);
 112         FIXME("(%p, %p): stub\n", This, pPerformance);
 113         return S_OK;
 114 }
 115
 116 static const IDirectMusicBandVtbl dmband_vtbl = {
 117     IDirectMusicBandImpl_QueryInterface,
 118     IDirectMusicBandImpl_AddRef,
 119     IDirectMusicBandImpl_Release,
 120     IDirectMusicBandImpl_CreateSegment,
 121     IDirectMusicBandImpl_Download,
 122     IDirectMusicBandImpl_Unload
 123 };
 124
 125 /* IDirectMusicBandImpl IDirectMusicObject part: */
 126 static HRESULT WINAPI IDirectMusicObjectImpl_ParseDescriptor(IDirectMusicObject *iface,
 127         IStream *pStream, DMUS_OBJECTDESC *pDesc)
 128 {
 129         DMUS_PRIVATE_CHUNK Chunk;
 130         DWORD StreamSize, StreamCount, ListSize[1], ListCount[1];
 131         LARGE_INTEGER liMove; /* used when skipping chunks */
 132
 133         TRACE("(%p, %p)\n", pStream, pDesc);
 134
 135         /* FIXME: should this be determined from stream? */
 136         pDesc->dwValidData |= DMUS_OBJ_CLASS;
 137         pDesc->guidClass = CLSID_DirectMusicBand;
 138
 139         IStream_Read (pStream, &Chunk, sizeof(FOURCC)+sizeof(DWORD), NULL);
 140         TRACE_(dmfile)(": %s chunk (size = 0x%04x)", debugstr_fourcc (Chunk.fccID), Chunk.dwSize);
 141         switch (Chunk.fccID) {
 142                 case FOURCC_RIFF: {
 143                         IStream_Read (pStream, &Chunk.fccID, sizeof(FOURCC), NULL);
 144                         TRACE_(dmfile)(": RIFF chunk of type %s", debugstr_fourcc(Chunk.fccID));
 145                         StreamSize = Chunk.dwSize - sizeof(FOURCC);
 146                         StreamCount = 0;
 147                         if (Chunk.fccID == DMUS_FOURCC_BAND_FORM) {
 148                                 TRACE_(dmfile)(": band form\n");
 149                                 do {
 150                                         IStream_Read (pStream, &Chunk, sizeof(FOURCC)+sizeof(DWORD), NULL);
 151                                         StreamCount += sizeof(FOURCC) + sizeof(DWORD) + Chunk.dwSize;
 152                                         TRACE_(dmfile)(": %s chunk (size = 0x%04x)", debugstr_fourcc (Chunk.fccID), Chunk.dwSize);
 153                                         switch (Chunk.fccID) {
 154                                                 case DMUS_FOURCC_GUID_CHUNK: {
 155                                                         TRACE_(dmfile)(": GUID chunk\n");
 156                                                         pDesc->dwValidData |= DMUS_OBJ_OBJECT;
 157                                                         IStream_Read (pStream, &pDesc->guidObject, Chunk.dwSize, NULL);
 158                                                         break;
 159                                                 }
 160                                                 case DMUS_FOURCC_VERSION_CHUNK: {
 161                                                         TRACE_(dmfile)(": version chunk\n");
 162                                                         pDesc->dwValidData |= DMUS_OBJ_VERSION;
 163                                                         IStream_Read (pStream, &pDesc->vVersion, Chunk.dwSize, NULL);
 164                                                         break;
 165                                                 }
 166                                                 case DMUS_FOURCC_CATEGORY_CHUNK: {
 167                                                         TRACE_(dmfile)(": category chunk\n");
 168                                                         pDesc->dwValidData |= DMUS_OBJ_CATEGORY;
 169                                                         IStream_Read (pStream, pDesc->wszCategory, Chunk.dwSize, NULL);
 170                                                         break;
 171                                                 }
 172                                                 case FOURCC_LIST: {
 173                                                         IStream_Read (pStream, &Chunk.fccID, sizeof(FOURCC), NULL);
 174                                                         TRACE_(dmfile)(": LIST chunk of type %s", debugstr_fourcc(Chunk.fccID));
 175                                                         ListSize[0] = Chunk.dwSize - sizeof(FOURCC);
 176                                                         ListCount[0] = 0;
 177                                                         switch (Chunk.fccID) {
 178                                                                 /* evil M$ UNFO list, which can (!?) contain INFO elements */
 179                                                                 case DMUS_FOURCC_UNFO_LIST: {
 180                                                                         TRACE_(dmfile)(": UNFO list\n");
 181                                                                         do {
 182                                                                                 IStream_Read (pStream, &Chunk, sizeof(FOURCC)+sizeof(DWORD), NULL);
 183                                                                                 ListCount[0] += sizeof(FOURCC) + sizeof(DWORD) + Chunk.dwSize;
 184                                                                                 TRACE_(dmfile)(": %s chunk (size = 0x%04x)", debugstr_fourcc (Chunk.fccID), Chunk.dwSize);
 185                                                                                 switch (Chunk.fccID) {
 186                                                                                         /* don't ask me why, but M$ puts INFO elements in UNFO list sometimes
 187                                              (though strings seem to be valid unicode) */
 188                                                                                         case mmioFOURCC('I','N','A','M'):
 189                                                                                         case DMUS_FOURCC_UNAM_CHUNK: {
 190                                                                                                 TRACE_(dmfile)(": name chunk\n");
 191                                                                                                 pDesc->dwValidData |= DMUS_OBJ_NAME;
 192                                                                                                 IStream_Read (pStream, pDesc->wszName, Chunk.dwSize, NULL);
 193                                                                                                 break;
 194                                                                                         }
 195                                                                                         case mmioFOURCC('I','A','R','T'):
 196                                                                                         case DMUS_FOURCC_UART_CHUNK: {
 197                                                                                                 TRACE_(dmfile)(": artist chunk (ignored)\n");
 198                                                                                                 liMove.QuadPart = Chunk.dwSize;
 199                                                                                                 IStream_Seek (pStream, liMove, STREAM_SEEK_CUR, NULL);
 200                                                                                                 break;
 201                                                                                         }
 202                                                                                         case mmioFOURCC('I','C','O','P'):
 203                                                                                         case DMUS_FOURCC_UCOP_CHUNK: {
 204                                                                                                 TRACE_(dmfile)(": copyright chunk (ignored)\n");
 205                                                                                                 liMove.QuadPart = Chunk.dwSize;
 206                                                                                                 IStream_Seek (pStream, liMove, STREAM_SEEK_CUR, NULL);
 207                                                                                                 break;
 208                                                                                         }
 209                                                                                         case mmioFOURCC('I','S','B','J'):
 210                                                                                         case DMUS_FOURCC_USBJ_CHUNK: {
 211                                                                                                 TRACE_(dmfile)(": subject chunk (ignored)\n");
 212                                                                                                 liMove.QuadPart = Chunk.dwSize;
 213                                                                                                 IStream_Seek (pStream, liMove, STREAM_SEEK_CUR, NULL);
 214                                                                                                 break;
 215                                                                                         }
 216                                                                                         case mmioFOURCC('I','C','M','T'):
 217                                                                                         case DMUS_FOURCC_UCMT_CHUNK: {
 218                                                                                                 TRACE_(dmfile)(": comment chunk (ignored)\n");
 219                                                                                                 liMove.QuadPart = Chunk.dwSize;
 220                                                                                                 IStream_Seek (pStream, liMove, STREAM_SEEK_CUR, NULL);
 221                                                                                                 break;
 222                                                                                         }
 223                                                                                         default: {
 224                                                                                                 TRACE_(dmfile)(": unknown chunk (irrelevant & skipping)\n");
 225                                                                                                 liMove.QuadPart = Chunk.dwSize;
 226                                                                                                 IStream_Seek (pStream, liMove, STREAM_SEEK_CUR, NULL);
 227                                                                                                 break;
 228                                                                                         }
 229                                                                                 }
 230                                                                                 TRACE_(dmfile)(": ListCount[0] = %d < ListSize[0] = %d\n", ListCount[0], ListSize[0]);
 231                                                                         } while (ListCount[0] < ListSize[0]);
 232                                                                         break;
 233                                                                 }
 234                                                                 default: {
 235                                                                         TRACE_(dmfile)(": unknown (skipping)\n");
 236                                                                         liMove.QuadPart = Chunk.dwSize - sizeof(FOURCC);
 237                                                                         IStream_Seek (pStream, liMove, STREAM_SEEK_CUR, NULL);
 238                                                                         break;
 239                                                                 }
 240                                                         }
 241                                                         break;
 242                                                 }
 243                                                 default: {
 244                                                         TRACE_(dmfile)(": unknown chunk (irrelevant & skipping)\n");
 245                                                         liMove.QuadPart = Chunk.dwSize;
 246                                                         IStream_Seek (pStream, liMove, STREAM_SEEK_CUR, NULL);
 247                                                         break;
 248                                                 }
 249                                         }
 250                                         TRACE_(dmfile)(": StreamCount[0] = %d < StreamSize[0] = %d\n", StreamCount, StreamSize);
 251                                 } while (StreamCount < StreamSize);
 252                         } else {
 253                                 TRACE_(dmfile)(": unexpected chunk; loading failed)\n");
 254                                 liMove.QuadPart = StreamSize;
 255                                 IStream_Seek (pStream, liMove, STREAM_SEEK_CUR, NULL); /* skip the rest of the chunk */
 256                                 return E_FAIL;
 257                         }
 258
 259                         TRACE_(dmfile)(": reading finished\n");
 260                         break;
 261                 }
 262                 default: {
 263                         TRACE_(dmfile)(": unexpected chunk; loading failed)\n");
 264                         liMove.QuadPart = Chunk.dwSize;
 265                         IStream_Seek (pStream, liMove, STREAM_SEEK_CUR, NULL); /* skip the rest of the chunk */
 266                         return DMUS_E_INVALIDFILE;
 267                 }
 268         }
 269
 270         TRACE(": returning descriptor:\n"); debug_DMUS_OBJECTDESC (pDesc);
 271
 272         return S_OK;
 273 }
 274
 275 static const IDirectMusicObjectVtbl dmobject_vtbl = {
 276     dmobj_IDirectMusicObject_QueryInterface,
 277     dmobj_IDirectMusicObject_AddRef,
 278     dmobj_IDirectMusicObject_Release,
 279     dmobj_IDirectMusicObject_GetDescriptor,
 280     dmobj_IDirectMusicObject_SetDescriptor,
 281     IDirectMusicObjectImpl_ParseDescriptor
 282 };
 283
 284 /* IDirectMusicBandImpl IPersistStream part: */
 285 static HRESULT parse_instrument(IDirectMusicBandImpl *This, DMUS_PRIVATE_CHUNK *pChunk,
 286         IStream *pStm)
 287 {
 288   DMUS_PRIVATE_CHUNK Chunk;
 289   DWORD ListSize[3], ListCount[3];
 290   LARGE_INTEGER liMove; /* used when skipping chunks */
 291   HRESULT hr;
 292
 293   DMUS_IO_INSTRUMENT inst;
 294   LPDMUS_PRIVATE_INSTRUMENT pNewInstrument;
 295   IDirectMusicObject* pObject = NULL;
 296
 297   if (pChunk->fccID != DMUS_FOURCC_INSTRUMENT_LIST) {
 298     ERR_(dmfile)(": %s chunk should be an INSTRUMENT list\n", debugstr_fourcc (pChunk->fccID));
 299     return E_FAIL;
 300   }
 301
 302   ListSize[0] = pChunk->dwSize - sizeof(FOURCC);
 303   ListCount[0] = 0;
 304
 305   do {
 306     IStream_Read (pStm, &Chunk, sizeof(FOURCC)+sizeof(DWORD), NULL);
 307     ListCount[0] += sizeof(FOURCC) + sizeof(DWORD) + Chunk.dwSize;
 308     TRACE_(dmfile)(": %s chunk (size = %d)", debugstr_fourcc (Chunk.fccID), Chunk.dwSize);
 309     switch (Chunk.fccID) {
 310     case DMUS_FOURCC_INSTRUMENT_CHUNK: {
 311       TRACE_(dmfile)(": Instrument chunk\n");
 312       if (Chunk.dwSize != sizeof(DMUS_IO_INSTRUMENT)) return E_FAIL;
 313       IStream_Read (pStm, &inst, sizeof(DMUS_IO_INSTRUMENT), NULL);
 314       TRACE_(dmfile)(" - dwPatch: %u\n", inst.dwPatch);
 315       TRACE_(dmfile)(" - dwAssignPatch: %u\n", inst.dwAssignPatch);
 316       TRACE_(dmfile)(" - dwNoteRanges[0]: %u\n", inst.dwNoteRanges[0]);
 317       TRACE_(dmfile)(" - dwNoteRanges[1]: %u\n", inst.dwNoteRanges[1]);
 318       TRACE_(dmfile)(" - dwNoteRanges[2]: %u\n", inst.dwNoteRanges[2]);
 319       TRACE_(dmfile)(" - dwNoteRanges[3]: %u\n", inst.dwNoteRanges[3]);
 320       TRACE_(dmfile)(" - dwPChannel: %u\n", inst.dwPChannel);
 321       TRACE_(dmfile)(" - dwFlags: %x\n", inst.dwFlags);
 322       TRACE_(dmfile)(" - bPan: %u\n", inst.bPan);
 323       TRACE_(dmfile)(" - bVolume: %u\n", inst.bVolume);
 324       TRACE_(dmfile)(" - nTranspose: %d\n", inst.nTranspose);
 325       TRACE_(dmfile)(" - dwChannelPriority: %u\n", inst.dwChannelPriority);
 326       TRACE_(dmfile)(" - nPitchBendRange: %d\n", inst.nPitchBendRange);
 327       break;
 328     }
 329     case FOURCC_LIST: {
 330       IStream_Read (pStm, &Chunk.fccID, sizeof(FOURCC), NULL);
 331       TRACE_(dmfile)(": LIST chunk of type %s", debugstr_fourcc(Chunk.fccID));
 332       ListSize[1] = Chunk.dwSize - sizeof(FOURCC);
 333       ListCount[1] = 0;
 334       switch (Chunk.fccID) {
 335       case DMUS_FOURCC_REF_LIST: {
 336         FIXME_(dmfile)(": DMRF (DM References) list\n");
 337         hr = IDirectMusicUtils_IPersistStream_ParseReference(&This->dmobj.IPersistStream_iface,
 338                 &Chunk, pStm, &pObject);
 339         if (FAILED(hr)) {
 340           ERR(": could not load Reference\n");
 341           return hr;
 342         }
 343         break;
 344       }
 345       default: {
 346         TRACE_(dmfile)(": unknown (skipping)\n");
 347         liMove.QuadPart = Chunk.dwSize - sizeof(FOURCC);
 348         IStream_Seek (pStm, liMove, STREAM_SEEK_CUR, NULL);
 349         break;
 350       }
 351       }
 352       break;
 353     }
 354     default: {
 355       TRACE_(dmfile)(": unknown chunk (irrelevant & skipping)\n");
 356       liMove.QuadPart = Chunk.dwSize;
 357       IStream_Seek (pStm, liMove, STREAM_SEEK_CUR, NULL);
 358       break;
 359     }
 360     }
 361     TRACE_(dmfile)(": ListCount[0] = %d < ListSize[0] = %d\n", ListCount[0], ListSize[0]);
 362   } while (ListCount[0] < ListSize[0]);
 363
 364   /*
 365    * @TODO insert pNewInstrument into This
 366    */
 367   pNewInstrument = HeapAlloc (GetProcessHeap (), HEAP_ZERO_MEMORY, sizeof(DMUS_PRIVATE_INSTRUMENT));
 368   if (NULL == pNewInstrument) {
 369     ERR(": no more memory\n");
 370     return  E_OUTOFMEMORY;
 371   }
 372   memcpy(&pNewInstrument->pInstrument, &inst, sizeof(DMUS_IO_INSTRUMENT));
 373   pNewInstrument->ppReferenceCollection = NULL;
 374   if (NULL != pObject) {
 375     IDirectMusicCollection* pCol = NULL;
 376     hr = IDirectMusicObject_QueryInterface (pObject, &IID_IDirectMusicCollection, (void**) &pCol);
 377     if (FAILED(hr)) {
 378       ERR(": failed to get IDirectMusicCollection Interface from DMObject\n");
 379       HeapFree(GetProcessHeap(), 0, pNewInstrument);
 380
 381       return hr;
 382     }
 383     pNewInstrument->ppReferenceCollection = pCol;
 384     IDirectMusicObject_Release(pObject);
 385   }
 386   list_add_tail (&This->Instruments, &pNewInstrument->entry);
 387
 388   return S_OK;
 389 }
 390
 391 static HRESULT parse_instruments_list(IDirectMusicBandImpl *This, DMUS_PRIVATE_CHUNK *pChunk,
 392         IStream *pStm)
 393 {
 394   HRESULT hr;
 395   DMUS_PRIVATE_CHUNK Chunk;
 396   DWORD ListSize[3], ListCount[3];
 397   LARGE_INTEGER liMove; /* used when skipping chunks */
 398
 399   if (pChunk->fccID != DMUS_FOURCC_INSTRUMENTS_LIST) {
 400     ERR_(dmfile)(": %s chunk should be an INSTRUMENTS list\n", debugstr_fourcc (pChunk->fccID));
 401     return E_FAIL;
 402   }
 403
 404   ListSize[0] = pChunk->dwSize - sizeof(FOURCC);
 405   ListCount[0] = 0;
 406
 407   do {
 408     IStream_Read (pStm, &Chunk, sizeof(FOURCC)+sizeof(DWORD), NULL);
 409     ListCount[0] += sizeof(FOURCC) + sizeof(DWORD) + Chunk.dwSize;
 410     TRACE_(dmfile)(": %s chunk (size = %d)", debugstr_fourcc (Chunk.fccID), Chunk.dwSize);
 411     switch (Chunk.fccID) {
 412     case FOURCC_LIST: {
 413       IStream_Read (pStm, &Chunk.fccID, sizeof(FOURCC), NULL);
 414       TRACE_(dmfile)(": LIST chunk of type %s", debugstr_fourcc(Chunk.fccID));
 415       ListSize[1] = Chunk.dwSize - sizeof(FOURCC);
 416       ListCount[1] = 0;
 417       switch (Chunk.fccID) {
 418       case DMUS_FOURCC_INSTRUMENT_LIST: {
 419         TRACE_(dmfile)(": Instrument list\n");
 420         hr = parse_instrument(This, &Chunk, pStm);
 421         if (FAILED(hr)) return hr;
 422         break;
 423       }
 424       default: {
 425         TRACE_(dmfile)(": unknown chunk (irrelevant & skipping)\n");
 426         liMove.QuadPart = ListSize[1];
 427         IStream_Seek (pStm, liMove, STREAM_SEEK_CUR, NULL);
 428         break;
 429       }
 430       }
 431       break;
 432     }
 433     default: {
 434       TRACE_(dmfile)(": unknown chunk (irrelevant & skipping)\n");
 435       liMove.QuadPart = Chunk.dwSize;
 436       IStream_Seek (pStm, liMove, STREAM_SEEK_CUR, NULL);
 437       break;
 438     }
 439     }
 440     TRACE_(dmfile)(": ListCount[0] = %d < ListSize[0] = %d\n", ListCount[0], ListSize[0]);
 441   } while (ListCount[0] < ListSize[0]);
 442
 443   return S_OK;
 444 }
 445
 446 static HRESULT parse_band_form(IDirectMusicBandImpl *This, DMUS_PRIVATE_CHUNK *pChunk,
 447         IStream *pStm)
 448 {
 449   HRESULT hr = E_FAIL;
 450   DMUS_PRIVATE_CHUNK Chunk;
 451   DWORD StreamSize, StreamCount, ListSize[3], ListCount[3];
 452   LARGE_INTEGER liMove; /* used when skipping chunks */
 453
 454   GUID tmp_guid;
 455
 456   if (pChunk->fccID != DMUS_FOURCC_BAND_FORM) {
 457     ERR_(dmfile)(": %s chunk should be a BAND form\n", debugstr_fourcc (pChunk->fccID));
 458     return E_FAIL;
 459   }
 460
 461   StreamSize = pChunk->dwSize - sizeof(FOURCC);
 462   StreamCount = 0;
 463
 464   do {
 465     IStream_Read (pStm, &Chunk, sizeof(FOURCC)+sizeof(DWORD), NULL);
 466     StreamCount += sizeof(FOURCC) + sizeof(DWORD) + Chunk.dwSize;
 467     TRACE_(dmfile)(": %s chunk (size = %d)", debugstr_fourcc (Chunk.fccID), Chunk.dwSize);
 468
 469     hr = IDirectMusicUtils_IPersistStream_ParseDescGeneric(&Chunk, pStm, &This->dmobj.desc);
 470     if (FAILED(hr)) return hr;
 471
 472     if (hr == S_FALSE) {
 473       switch (Chunk.fccID) {
 474       case DMUS_FOURCC_GUID_CHUNK: {
 475         TRACE_(dmfile)(": GUID\n");
 476         IStream_Read (pStm, &tmp_guid, sizeof(GUID), NULL);
 477         TRACE_(dmfile)(" - guid: %s\n", debugstr_dmguid(&tmp_guid));
 478         break;
 479       }
 480       case FOURCC_LIST: {
 481         IStream_Read (pStm, &Chunk.fccID, sizeof(FOURCC), NULL);
 482         TRACE_(dmfile)(": LIST chunk of type %s", debugstr_fourcc(Chunk.fccID));
 483         ListSize[0] = Chunk.dwSize - sizeof(FOURCC);
 484         ListCount[0] = 0;
 485         switch (Chunk.fccID) {
 486         case DMUS_FOURCC_UNFO_LIST: {
 487           TRACE_(dmfile)(": UNFO list\n");
 488           do {
 489             IStream_Read (pStm, &Chunk, sizeof(FOURCC)+sizeof(DWORD), NULL);
 490             ListCount[0] += sizeof(FOURCC) + sizeof(DWORD) + Chunk.dwSize;
 491             TRACE_(dmfile)(": %s chunk (size = %d)", debugstr_fourcc (Chunk.fccID), Chunk.dwSize);
 492
 493             hr = IDirectMusicUtils_IPersistStream_ParseUNFOGeneric(&Chunk, pStm, &This->dmobj.desc);
 494             if (FAILED(hr)) return hr;
 495
 496             if (hr == S_FALSE) {
 497               switch (Chunk.fccID) {
 498               default: {
 499                 TRACE_(dmfile)(": unknown chunk (irrelevant & skipping)\n");
 500                 liMove.QuadPart = Chunk.dwSize;
 501                 IStream_Seek (pStm, liMove, STREAM_SEEK_CUR, NULL);
 502                 break;
 503               }
 504               }
 505             }
 506             TRACE_(dmfile)(": ListCount[0] = %d < ListSize[0] = %d\n", ListCount[0], ListSize[0]);
 507           } while (ListCount[0] < ListSize[0]);
 508           break;
 509         }
 510         case DMUS_FOURCC_INSTRUMENTS_LIST: {
 511           TRACE_(dmfile)(": INSTRUMENTS list\n");
 512           hr = parse_instruments_list(This, &Chunk, pStm);
 513           if (FAILED(hr)) return hr;
 514           break;
 515         }
 516         default: {
 517           TRACE_(dmfile)(": unknown (skipping)\n");
 518           liMove.QuadPart = Chunk.dwSize - sizeof(FOURCC);
 519           IStream_Seek (pStm, liMove, STREAM_SEEK_CUR, NULL);
 520           break;
 521         }
 522         }
 523         break;
 524       }
 525       default: {
 526         TRACE_(dmfile)(": unknown chunk (irrelevant & skipping)\n");
 527         liMove.QuadPart = Chunk.dwSize;
 528         IStream_Seek (pStm, liMove, STREAM_SEEK_CUR, NULL);
 529         break;
 530       }
 531       }
 532     }
 533     TRACE_(dmfile)(": StreamCount[0] = %d < StreamSize[0] = %d\n", StreamCount, StreamSize);
 534   } while (StreamCount < StreamSize);
 535
 536   return S_OK;
 537 }
 538
 539 static inline IDirectMusicBandImpl *impl_from_IPersistStream(IPersistStream *iface)
 540 {
 541     return CONTAINING_RECORD(iface, IDirectMusicBandImpl, dmobj.IPersistStream_iface);
 542 }
 543
 544 static HRESULT WINAPI IPersistStreamImpl_Load(IPersistStream *iface, IStream *pStm)
 545 {
 546   IDirectMusicBandImpl *This = impl_from_IPersistStream(iface);
 547   DMUS_PRIVATE_CHUNK Chunk;
 548   LARGE_INTEGER liMove;
 549   HRESULT hr;
 550
 551   TRACE("(%p,%p): loading\n", This, pStm);
 552
 553   IStream_Read (pStm, &Chunk, sizeof(FOURCC)+sizeof(DWORD), NULL);
 554   TRACE_(dmfile)(": %s chunk (size = %d)", debugstr_fourcc (Chunk.fccID), Chunk.dwSize);
 555   switch (Chunk.fccID) {
 556   case FOURCC_RIFF: {
 557     IStream_Read (pStm, &Chunk.fccID, sizeof(FOURCC), NULL);
 558     TRACE_(dmfile)(": %s chunk (size = %d)", debugstr_fourcc (Chunk.fccID), Chunk.dwSize);
 559     switch (Chunk.fccID) {
 560     case DMUS_FOURCC_BAND_FORM: {
 561       TRACE_(dmfile)(": Band form\n");
 562       hr = parse_band_form(This, &Chunk, pStm);
 563       if (FAILED(hr)) return hr;
 564       break;
 565     }
 566     default: {
 567       TRACE_(dmfile)(": unexpected chunk; loading failed)\n");
 568       liMove.QuadPart = Chunk.dwSize;
 569       IStream_Seek (pStm, liMove, STREAM_SEEK_CUR, NULL);
 570       return E_FAIL;
 571     }
 572     }
 573     TRACE_(dmfile)(": reading finished\n");
 574     break;
 575   }
 576   default: {
 577     TRACE_(dmfile)(": unexpected chunk; loading failed)\n");
 578     liMove.QuadPart = Chunk.dwSize;
 579     IStream_Seek (pStm, liMove, STREAM_SEEK_CUR, NULL); /* skip the rest of the chunk */
 580     return E_FAIL;
 581   }
 582   }
 583
 584   return S_OK;
 585 }
 586
 587 static const IPersistStreamVtbl persiststream_vtbl = {
 588     dmobj_IPersistStream_QueryInterface,
 589     dmobj_IPersistStream_AddRef,
 590     dmobj_IPersistStream_Release,
 591     unimpl_IPersistStream_GetClassID,
 592     unimpl_IPersistStream_IsDirty,
 593     IPersistStreamImpl_Load,
 594     unimpl_IPersistStream_Save,
 595     unimpl_IPersistStream_GetSizeMax
 596 };
 597
 598 /* for ClassFactory */
 599 HRESULT WINAPI create_dmband(REFIID lpcGUID, void **ppobj)
 600 {
 601   IDirectMusicBandImpl* obj;
 602   HRESULT hr;
 603
 604   obj = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(IDirectMusicBandImpl));
 605   if (NULL == obj) {
 606     *ppobj = NULL;
 607     return E_OUTOFMEMORY;
 608   }
 609   obj->IDirectMusicBand_iface.lpVtbl = &dmband_vtbl;
 610   obj->ref = 1;
 611   dmobject_init(&obj->dmobj, &CLSID_DirectMusicBand, (IUnknown *)&obj->IDirectMusicBand_iface);
 612   obj->dmobj.IDirectMusicObject_iface.lpVtbl = &dmobject_vtbl;
 613   obj->dmobj.IPersistStream_iface.lpVtbl = &persiststream_vtbl;
 614   list_init (&obj->Instruments);
 615
 616   DMBAND_LockModule();
 617   hr = IDirectMusicBand_QueryInterface(&obj->IDirectMusicBand_iface, lpcGUID, ppobj);
 618   IDirectMusicBand_Release(&obj->IDirectMusicBand_iface);
 619
 620   return hr;
 621 }