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container.c

/* IDirectMusicContainerImpl
 *
 * Copyright (C) 2003-2004 Rok Mandeljc
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
 */

#include "dmloader_private.h"

WINE_DEFAULT_DEBUG_CHANNEL(dmloader);
WINE_DECLARE_DEBUG_CHANNEL(dmfile);
WINE_DECLARE_DEBUG_CHANNEL(dmdump);

#define DMUS_MAX_CATEGORY_SIZE DMUS_MAX_CATEGORY*sizeof(WCHAR)
#define DMUS_MAX_NAME_SIZE     DMUS_MAX_NAME*sizeof(WCHAR)
#define DMUS_MAX_FILENAME_SIZE DMUS_MAX_FILENAME*sizeof(WCHAR)

static ULONG WINAPI IDirectMusicContainerImpl_IDirectMusicContainer_AddRef (LPDIRECTMUSICCONTAINER iface);
static ULONG WINAPI IDirectMusicContainerImpl_IDirectMusicObject_AddRef (LPDIRECTMUSICOBJECT iface);
static ULONG WINAPI IDirectMusicContainerImpl_IPersistStream_AddRef (LPPERSISTSTREAM iface);

/*****************************************************************************
 * IDirectMusicContainerImpl implementation
 */
/* IUnknown/IDirectMusicContainer part: */

static HRESULT DMUSIC_DestroyDirectMusicContainerImpl (LPDIRECTMUSICCONTAINER iface) {
      ICOM_THIS_MULTI(IDirectMusicContainerImpl, ContainerVtbl, iface);
      LPDIRECTMUSICLOADER pLoader;
      LPDIRECTMUSICGETLOADER pGetLoader;
      struct list *pEntry;
      LPWINE_CONTAINER_ENTRY pContainedObject;

      /* get loader (from stream we loaded from) */
      TRACE(": getting loader\n");
      IStream_QueryInterface (This->pStream, &IID_IDirectMusicGetLoader, (LPVOID*)&pGetLoader);
      IDirectMusicGetLoader_GetLoader (pGetLoader, &pLoader);
      IDirectMusicGetLoader_Release (pGetLoader);

      /* release objects from loader's cache (if appropriate) */
      TRACE(": releasing objects from loader's cache\n");
      LIST_FOR_EACH (pEntry, This->pContainedObjects) {
            pContainedObject = LIST_ENTRY (pEntry, WINE_CONTAINER_ENTRY, entry);
            /* my tests indicate that container releases objects *only*
               if they were loaded at its load-time (makes sense, it doesn't
               have pointers to objects otherwise); BTW: native container seems
               to ignore the flags (I won't) */
            if (pContainedObject->pObject && !(pContainedObject->dwFlags & DMUS_CONTAINED_OBJF_KEEP)) {
                  /* flags say it shouldn't be kept in loader's cache */
                  IDirectMusicLoader_ReleaseObject (pLoader, pContainedObject->pObject);
            }
      }
      IDirectMusicLoader_Release (pLoader);

      /* release stream we loaded from */
      IStream_Release (This->pStream);

      /* FIXME: release allocated entries */

      /* decrease number of instances */
      InterlockedDecrement (&dwDirectMusicContainer);

      return S_OK;
}

static HRESULT WINAPI IDirectMusicContainerImpl_IDirectMusicContainer_QueryInterface (LPDIRECTMUSICCONTAINER iface, REFIID riid, LPVOID *ppobj) {
      ICOM_THIS_MULTI(IDirectMusicContainerImpl, ContainerVtbl, iface);
      
      TRACE("(%p, %s, %p)\n", This, debugstr_dmguid(riid), ppobj);
      if (IsEqualIID (riid, &IID_IUnknown) ||
            IsEqualIID (riid, &IID_IDirectMusicContainer)) {
            *ppobj = (LPVOID)&This->ContainerVtbl;
            IDirectMusicContainerImpl_IDirectMusicContainer_AddRef ((LPDIRECTMUSICCONTAINER)&This->ContainerVtbl);
            return S_OK;
      } else if (IsEqualIID (riid, &IID_IDirectMusicObject)) {
            *ppobj = (LPVOID)&This->ObjectVtbl;
            IDirectMusicContainerImpl_IDirectMusicObject_AddRef ((LPDIRECTMUSICOBJECT)&This->ObjectVtbl);         
            return S_OK;
      } else if (IsEqualIID (riid, &IID_IPersistStream)) {
            *ppobj = (LPVOID)&This->PersistStreamVtbl;
            IDirectMusicContainerImpl_IPersistStream_AddRef ((LPPERSISTSTREAM)&This->PersistStreamVtbl);          
            return S_OK;
      }
      
      WARN(": not found\n");
      return E_NOINTERFACE;
}

static ULONG WINAPI IDirectMusicContainerImpl_IDirectMusicContainer_AddRef (LPDIRECTMUSICCONTAINER iface) {
      ICOM_THIS_MULTI(IDirectMusicContainerImpl, ContainerVtbl, iface);
      TRACE("(%p): AddRef from %d\n", This, This->dwRef);
      return InterlockedIncrement (&This->dwRef);
}

static ULONG WINAPI IDirectMusicContainerImpl_IDirectMusicContainer_Release (LPDIRECTMUSICCONTAINER iface) {
      ICOM_THIS_MULTI(IDirectMusicContainerImpl, ContainerVtbl, iface);
      
      DWORD dwRef = InterlockedDecrement (&This->dwRef);
      TRACE("(%p): ReleaseRef to %d\n", This, dwRef);
      if (dwRef == 0) {
            DMUSIC_DestroyDirectMusicContainerImpl (iface);
            HeapFree(GetProcessHeap(), 0, This);
      }
      
      return dwRef;
}

static HRESULT WINAPI IDirectMusicContainerImpl_IDirectMusicContainer_EnumObject (LPDIRECTMUSICCONTAINER iface, REFGUID rguidClass, DWORD dwIndex, LPDMUS_OBJECTDESC pDesc, WCHAR* pwszAlias) {
      ICOM_THIS_MULTI(IDirectMusicContainerImpl, ContainerVtbl, iface); 
      struct list *pEntry;
      LPWINE_CONTAINER_ENTRY pContainedObject;
      DWORD dwCount = 0;

      TRACE("(%p, %s, %d, %p, %p)\n", This, debugstr_dmguid(rguidClass), dwIndex, pDesc, pwszAlias);

      /* check if we can write to whole pDesc */
      if (pDesc) {
            if (IsBadReadPtr (pDesc, sizeof(DWORD))) {
                  ERR(": pDesc->dwSize bad read pointer\n");
                  return E_POINTER;
            }
            if (pDesc->dwSize != sizeof(DMUS_OBJECTDESC)) {
                  ERR(": invalid pDesc->dwSize\n");
                  return E_INVALIDARG;
            }
            if (IsBadWritePtr (pDesc, sizeof(DMUS_OBJECTDESC))) {
                  ERR(": pDesc bad write pointer\n");
                  return E_POINTER;
            }
      }
      /* check if wszAlias is big enough */
      if (pwszAlias && IsBadWritePtr (pwszAlias, DMUS_MAX_FILENAME_SIZE)) {
            ERR(": wszAlias bad write pointer\n");
            return E_POINTER;       
      }
      
      DM_STRUCT_INIT(pDesc);
      
      LIST_FOR_EACH (pEntry, This->pContainedObjects) {
            pContainedObject = LIST_ENTRY (pEntry, WINE_CONTAINER_ENTRY, entry);
            
            if (IsEqualGUID (rguidClass, &GUID_DirectMusicAllTypes) || IsEqualGUID (rguidClass, &pContainedObject->Desc.guidClass)) {
                  if (dwCount == dwIndex) {
                        HRESULT result = S_OK;
                        if (pwszAlias) {
                              lstrcpynW (pwszAlias, pContainedObject->wszAlias, DMUS_MAX_FILENAME);
                              if (strlenW (pContainedObject->wszAlias) > DMUS_MAX_FILENAME)
                                    result = DMUS_S_STRING_TRUNCATED;
                        }
                        if (pDesc)
                              *pDesc = pContainedObject->Desc;
                        return result;
                  }
                  dwCount++;
            }
      }           
      
      TRACE(": not found\n");
      return S_FALSE;
}

static const IDirectMusicContainerVtbl DirectMusicContainer_Container_Vtbl = {
      IDirectMusicContainerImpl_IDirectMusicContainer_QueryInterface,
      IDirectMusicContainerImpl_IDirectMusicContainer_AddRef,
      IDirectMusicContainerImpl_IDirectMusicContainer_Release,
      IDirectMusicContainerImpl_IDirectMusicContainer_EnumObject
};

/* IDirectMusicObject part: */
static HRESULT WINAPI IDirectMusicContainerImpl_IDirectMusicObject_QueryInterface (LPDIRECTMUSICOBJECT iface, REFIID riid, LPVOID *ppobj) {
      ICOM_THIS_MULTI(IDirectMusicContainerImpl, ObjectVtbl, iface);
      return IDirectMusicContainerImpl_IDirectMusicContainer_QueryInterface ((LPDIRECTMUSICCONTAINER)&This->ContainerVtbl, riid, ppobj);
}

static ULONG WINAPI IDirectMusicContainerImpl_IDirectMusicObject_AddRef (LPDIRECTMUSICOBJECT iface) {
      ICOM_THIS_MULTI(IDirectMusicContainerImpl, ObjectVtbl, iface);
      return IDirectMusicContainerImpl_IDirectMusicContainer_AddRef ((LPDIRECTMUSICCONTAINER)&This->ContainerVtbl);
}

static ULONG WINAPI IDirectMusicContainerImpl_IDirectMusicObject_Release (LPDIRECTMUSICOBJECT iface) {
      ICOM_THIS_MULTI(IDirectMusicContainerImpl, ObjectVtbl, iface);
      return IDirectMusicContainerImpl_IDirectMusicContainer_Release ((LPDIRECTMUSICCONTAINER)&This->ContainerVtbl);
}

static HRESULT WINAPI IDirectMusicContainerImpl_IDirectMusicObject_GetDescriptor (LPDIRECTMUSICOBJECT iface, LPDMUS_OBJECTDESC pDesc) {
      ICOM_THIS_MULTI(IDirectMusicContainerImpl, ObjectVtbl, iface);
      TRACE("(%p, %p):\n", This, pDesc);
      
      /* check if we can write to whole pDesc */
      if (IsBadReadPtr (pDesc, sizeof(DWORD))) {
            ERR(": pDesc->dwSize bad read pointer\n");
            return E_POINTER;
      }
      if (pDesc->dwSize != sizeof(DMUS_OBJECTDESC)) {
            ERR(": invalid pDesc->dwSize\n");
            return E_INVALIDARG;
      }
      if (IsBadWritePtr (pDesc, sizeof(DMUS_OBJECTDESC))) {
            ERR(": pDesc bad write pointer\n");
            return E_POINTER;
      }

      DM_STRUCT_INIT(pDesc);
      *pDesc = This->Desc;

      return S_OK;
}

static HRESULT WINAPI IDirectMusicContainerImpl_IDirectMusicObject_SetDescriptor (LPDIRECTMUSICOBJECT iface, LPDMUS_OBJECTDESC pDesc) {
      DWORD dwNewFlags = 0;
      DWORD dwFlagDifference;
      ICOM_THIS_MULTI(IDirectMusicContainerImpl, ObjectVtbl, iface);
      TRACE("(%p, %p):\n", This, pDesc);

      /* check if we can read whole pDesc */
      if (IsBadReadPtr (pDesc, sizeof(DWORD))) {
            ERR(": pDesc->dwSize bad read pointer\n");
            return E_POINTER;
      }
      if (pDesc->dwSize != sizeof(DMUS_OBJECTDESC)) {
            ERR(": invalid pDesc->dwSize\n");
            return E_INVALIDARG;
      }
      if (IsBadReadPtr (pDesc, sizeof(DMUS_OBJECTDESC))) {
            ERR(": pDesc bad read pointer\n");
            return E_POINTER;
      }

      if (pDesc->dwValidData & DMUS_OBJ_OBJECT) {
            This->Desc.guidObject = pDesc->guidObject;
            dwNewFlags |= DMUS_OBJ_OBJECT;
      }
      if (pDesc->dwValidData & DMUS_OBJ_NAME) {
            lstrcpynW (This->Desc.wszName, pDesc->wszName, DMUS_MAX_NAME);
            dwNewFlags |= DMUS_OBJ_NAME;
      }
      if (pDesc->dwValidData & DMUS_OBJ_CATEGORY) {
            lstrcpynW (This->Desc.wszCategory, pDesc->wszCategory, DMUS_MAX_CATEGORY);
            dwNewFlags |= DMUS_OBJ_CATEGORY;
      }
      if (pDesc->dwValidData & (DMUS_OBJ_FILENAME | DMUS_OBJ_FULLPATH)) {
            lstrcpynW (This->Desc.wszFileName, pDesc->wszFileName, DMUS_MAX_FILENAME);
            dwNewFlags |= (pDesc->dwValidData & (DMUS_OBJ_FILENAME | DMUS_OBJ_FULLPATH));
      }
      if (pDesc->dwValidData & DMUS_OBJ_VERSION) {
            This->Desc.vVersion.dwVersionLS = pDesc->vVersion.dwVersionLS;
            This->Desc.vVersion.dwVersionMS = pDesc->vVersion.dwVersionMS;
            dwNewFlags |= DMUS_OBJ_VERSION;
      }
      if (pDesc->dwValidData & DMUS_OBJ_DATE) {
            This->Desc.ftDate.dwHighDateTime = pDesc->ftDate.dwHighDateTime;
            This->Desc.ftDate.dwLowDateTime = pDesc->ftDate.dwLowDateTime;
            dwNewFlags |= DMUS_OBJ_DATE;
      }
      /* set new flags */
      This->Desc.dwValidData |= dwNewFlags;
      
      dwFlagDifference = pDesc->dwValidData - dwNewFlags;
      if (dwFlagDifference) {
            pDesc->dwValidData &= ~dwFlagDifference; /* and with bitwise complement */
            return S_FALSE;
      } else return S_OK;
}

static HRESULT WINAPI IDirectMusicContainerImpl_IDirectMusicObject_ParseDescriptor (LPDIRECTMUSICOBJECT iface, LPSTREAM pStream, LPDMUS_OBJECTDESC pDesc) {
      ICOM_THIS_MULTI(IDirectMusicContainerImpl, ObjectVtbl, iface);
      WINE_CHUNK Chunk;
      DWORD StreamSize, StreamCount, ListSize[1], ListCount[1];
      LARGE_INTEGER liMove; /* used when skipping chunks */

      TRACE("(%p, %p, %p)\n", This, pStream, pDesc);
      
      /* check whether arguments are OK */
      if (IsBadReadPtr (pStream, sizeof(LPVOID))) {
            ERR(": pStream bad read pointer\n");
            return E_POINTER;
      }
      /* check whether pDesc is OK */
      if (IsBadReadPtr (pDesc, sizeof(DWORD))) {
            ERR(": pDesc->dwSize bad read pointer\n");
            return E_POINTER;
      }
      if (pDesc->dwSize != sizeof(DMUS_OBJECTDESC)) {
            ERR(": invalid pDesc->dwSize\n");
            return E_INVALIDARG;
      }
      if (IsBadWritePtr (pDesc, sizeof(DMUS_OBJECTDESC))) {
            ERR(": pDesc bad write pointer\n");
            return E_POINTER;
      }

      DM_STRUCT_INIT(pDesc);
      
      /* here we go... */
      IStream_Read (pStream, &Chunk, sizeof(FOURCC)+sizeof(DWORD), NULL);
      TRACE_(dmfile)(": %s chunk (size = 0x%08X)", debugstr_fourcc (Chunk.fccID), Chunk.dwSize);
      switch (Chunk.fccID) {  
            case FOURCC_RIFF: {
                  IStream_Read (pStream, &Chunk.fccID, sizeof(FOURCC), NULL);                   
                  TRACE_(dmfile)(": RIFF chunk of type %s", debugstr_fourcc(Chunk.fccID));
                  StreamSize = Chunk.dwSize - sizeof(FOURCC);
                  StreamCount = 0;
                  if (Chunk.fccID == DMUS_FOURCC_CONTAINER_FORM) {
                        TRACE_(dmfile)(": container form\n");
                        /* set guidClass */
                        pDesc->dwValidData |= DMUS_OBJ_CLASS;
                        pDesc->guidClass = CLSID_DirectMusicContainer;
                        do {
                              IStream_Read (pStream, &Chunk, sizeof(FOURCC)+sizeof(DWORD), NULL);
                              StreamCount += sizeof(FOURCC) + sizeof(DWORD) + Chunk.dwSize;
                              TRACE_(dmfile)(": %s chunk (size = 0x%08X)", debugstr_fourcc (Chunk.fccID), Chunk.dwSize);
                              switch (Chunk.fccID) {
                                    case DMUS_FOURCC_GUID_CHUNK: {
                                          TRACE_(dmfile)(": GUID chunk\n");
                                          pDesc->dwValidData |= DMUS_OBJ_OBJECT;
                                          IStream_Read (pStream, &pDesc->guidObject, Chunk.dwSize, NULL);
                                          TRACE_(dmdump)(": GUID: %s\n", debugstr_guid(&pDesc->guidObject));
                                          break;
                                    }
                                    case DMUS_FOURCC_VERSION_CHUNK: {
                                          TRACE_(dmfile)(": version chunk\n");
                                          pDesc->dwValidData |= DMUS_OBJ_VERSION;
                                          IStream_Read (pStream, &pDesc->vVersion, Chunk.dwSize, NULL);
                                          TRACE_(dmdump)(": version: %s\n", debugstr_dmversion(&pDesc->vVersion));
                                          break;
                                    }
                                    case DMUS_FOURCC_DATE_CHUNK: {
                                          TRACE_(dmfile)(": date chunk\n");
                                          IStream_Read (pStream, &pDesc->ftDate, Chunk.dwSize, NULL);
                                          pDesc->dwValidData |= DMUS_OBJ_DATE;
                                          TRACE_(dmdump)(": date: %s\n", debugstr_filetime(&pDesc->ftDate));
                                          break;
                                    }                                               
                                    case DMUS_FOURCC_CATEGORY_CHUNK: {
                                          TRACE_(dmfile)(": category chunk\n");
                                          /* if it happens that string is too long,
                                             read what we can and skip the rest*/
                                          if (Chunk.dwSize > DMUS_MAX_CATEGORY_SIZE) {
                                                IStream_Read (pStream, pDesc->wszCategory, DMUS_MAX_CATEGORY_SIZE, NULL);
                                                liMove.QuadPart = Chunk.dwSize - DMUS_MAX_CATEGORY_SIZE;
                                                IStream_Seek (pStream, liMove, STREAM_SEEK_CUR, NULL);
                                          } else {
                                                IStream_Read (pStream, pDesc->wszCategory, Chunk.dwSize, NULL);
                                          }
                                          pDesc->dwValidData |= DMUS_OBJ_CATEGORY;
                                          TRACE_(dmdump)(": category: %s\n", debugstr_w(pDesc->wszCategory));                                         
                                          break;
                                    }
                                    case FOURCC_LIST: {
                                          IStream_Read (pStream, &Chunk.fccID, sizeof(FOURCC), NULL);                   
                                          TRACE_(dmfile)(": LIST chunk of type %s", debugstr_fourcc(Chunk.fccID));
                                          ListSize[0] = Chunk.dwSize - sizeof(FOURCC);
                                          ListCount[0] = 0;
                                          switch (Chunk.fccID) {
                                                /* evil M$ UNFO list, which can (!?) contain INFO elements */
                                                case DMUS_FOURCC_UNFO_LIST: {
                                                      TRACE_(dmfile)(": UNFO list\n");
                                                      do {
                                                            IStream_Read (pStream, &Chunk, sizeof(FOURCC)+sizeof(DWORD), NULL);
                                                            ListCount[0] += sizeof(FOURCC) + sizeof(DWORD) + Chunk.dwSize;
                                                            TRACE_(dmfile)(": %s chunk (size = 0x%08X)", debugstr_fourcc (Chunk.fccID), Chunk.dwSize);
                                                            switch (Chunk.fccID) {
                                                                  /* don't ask me why, but M$ puts INFO elements in UNFO list sometimes
                                             (though strings seem to be valid unicode) */
                                                                  case mmioFOURCC('I','N','A','M'):
                                                                  case DMUS_FOURCC_UNAM_CHUNK: {
                                                                        TRACE_(dmfile)(": name chunk\n");
                                                                        /* if it happens that string is too long,
                                                                                 read what we can and skip the rest*/
                                                                        if (Chunk.dwSize > DMUS_MAX_NAME_SIZE) {
                                                                              IStream_Read (pStream, pDesc->wszName, DMUS_MAX_NAME_SIZE, NULL);
                                                                              liMove.QuadPart = Chunk.dwSize - DMUS_MAX_NAME_SIZE;
                                                                              IStream_Seek (pStream, liMove, STREAM_SEEK_CUR, NULL);
                                                                        } else {
                                                                              IStream_Read (pStream, pDesc->wszName, Chunk.dwSize, NULL);
                                                                        }
                                                                        pDesc->dwValidData |= DMUS_OBJ_NAME;
                                                                        TRACE_(dmdump)(": name: %s\n", debugstr_w(pDesc->wszName));
                                                                        break;
                                                                  }
                                                                  default: {
                                                                        TRACE_(dmfile)(": unknown chunk (irrevelant & skipping)\n");
                                                                        liMove.QuadPart = Chunk.dwSize;
                                                                        IStream_Seek (pStream, liMove, STREAM_SEEK_CUR, NULL);
                                                                        break;                                    
                                                                  }
                                                            }
                                                            TRACE_(dmfile)(": ListCount[0] = 0x%08X < ListSize[0] = 0x%08X\n", ListCount[0], ListSize[0]);
                                                      } while (ListCount[0] < ListSize[0]);
                                                      break;
                                                }
                                                default: {
                                                      TRACE_(dmfile)(": unknown (skipping)\n");
                                                      liMove.QuadPart = Chunk.dwSize - sizeof(FOURCC);
                                                      IStream_Seek (pStream, liMove, STREAM_SEEK_CUR, NULL);
                                                      break;                                    
                                                }
                                          }
                                          break;
                                    }     
                                    default: {
                                          TRACE_(dmfile)(": unknown chunk (irrevelant & skipping)\n");
                                          liMove.QuadPart = Chunk.dwSize;
                                          IStream_Seek (pStream, liMove, STREAM_SEEK_CUR, NULL);
                                          break;                                    
                                    }
                              }
                              TRACE_(dmfile)(": StreamCount[0] = 0x%08X < StreamSize[0] = 0x%08X\n", StreamCount, StreamSize);
                        } while (StreamCount < StreamSize);
                  } else {
                        TRACE_(dmfile)(": unexpected chunk; loading failed)\n");
                        liMove.QuadPart = StreamSize;
                        IStream_Seek (pStream, liMove, STREAM_SEEK_CUR, NULL); /* skip the rest of the chunk */
                        return E_FAIL;
                  }
            
                  TRACE_(dmfile)(": reading finished\n");
                  break;
            }
            default: {
                  TRACE_(dmfile)(": unexpected chunk; loading failed)\n");
                  liMove.QuadPart = Chunk.dwSize;
                  IStream_Seek (pStream, liMove, STREAM_SEEK_CUR, NULL); /* skip the rest of the chunk */
                  return DMUS_E_INVALIDFILE;
            }
      }     
      
      TRACE(": returning descriptor:\n%s\n", debugstr_DMUS_OBJECTDESC(pDesc));
      return S_OK;      
}

static const IDirectMusicObjectVtbl DirectMusicContainer_Object_Vtbl = {
      IDirectMusicContainerImpl_IDirectMusicObject_QueryInterface,
      IDirectMusicContainerImpl_IDirectMusicObject_AddRef,
      IDirectMusicContainerImpl_IDirectMusicObject_Release,
      IDirectMusicContainerImpl_IDirectMusicObject_GetDescriptor,
      IDirectMusicContainerImpl_IDirectMusicObject_SetDescriptor,
      IDirectMusicContainerImpl_IDirectMusicObject_ParseDescriptor
};

/* IPersistStream part: */
static HRESULT WINAPI IDirectMusicContainerImpl_IPersistStream_QueryInterface (LPPERSISTSTREAM iface, REFIID riid, LPVOID *ppobj) {
      ICOM_THIS_MULTI(IDirectMusicContainerImpl, PersistStreamVtbl, iface);
      return IDirectMusicContainerImpl_IDirectMusicContainer_QueryInterface ((LPDIRECTMUSICCONTAINER)&This->ContainerVtbl, riid, ppobj);
}

static ULONG WINAPI IDirectMusicContainerImpl_IPersistStream_AddRef (LPPERSISTSTREAM iface) {
      ICOM_THIS_MULTI(IDirectMusicContainerImpl, PersistStreamVtbl, iface);
      return IDirectMusicContainerImpl_IDirectMusicContainer_AddRef ((LPDIRECTMUSICCONTAINER)&This->ContainerVtbl);
}

static ULONG WINAPI IDirectMusicContainerImpl_IPersistStream_Release (LPPERSISTSTREAM iface) {
      ICOM_THIS_MULTI(IDirectMusicContainerImpl, PersistStreamVtbl, iface);
      return IDirectMusicContainerImpl_IDirectMusicContainer_Release ((LPDIRECTMUSICCONTAINER)&This->ContainerVtbl);
}

static HRESULT WINAPI IDirectMusicContainerImpl_IPersistStream_GetClassID (LPPERSISTSTREAM iface, CLSID* pClassID) {
      ICOM_THIS_MULTI(IDirectMusicContainerImpl, PersistStreamVtbl, iface);
      
      TRACE("(%p, %p)\n", This, pClassID);
      if (IsBadWritePtr (pClassID, sizeof(CLSID))) {
            ERR(": pClassID bad write pointer\n");
            return E_POINTER;
      }
      
      *pClassID = CLSID_DirectMusicContainer;
      return S_OK;
}

static HRESULT WINAPI IDirectMusicContainerImpl_IPersistStream_IsDirty (LPPERSISTSTREAM iface) {
      /* FIXME: is implemented (somehow) */
      return E_NOTIMPL;
}

static HRESULT WINAPI IDirectMusicContainerImpl_IPersistStream_Load (LPPERSISTSTREAM iface, IStream* pStm) {
      ICOM_THIS_MULTI(IDirectMusicContainerImpl, PersistStreamVtbl, iface);
      WINE_CHUNK Chunk;
      DWORD StreamSize, StreamCount, ListSize[3], ListCount[3];
      LARGE_INTEGER liMove; /* used when skipping chunks */
      ULARGE_INTEGER uliPos; /* needed when dealing with RIFF chunks */
      LPDIRECTMUSICGETLOADER pGetLoader;
      LPDIRECTMUSICLOADER pLoader;
      HRESULT result = S_OK;

      TRACE("(%p, %p):\n", This, pStm);
      
      /* check whether pStm is valid read pointer */
      if (IsBadReadPtr (pStm, sizeof(LPVOID))) {
            ERR(": pStm bad read pointer\n");
            return E_POINTER;
      }
      /* if stream is already set, this means the container is already loaded */
      if (This->pStream) {
            TRACE(": stream is already set, which means container is already loaded\n");
            return DMUS_E_ALREADY_LOADED;
      }

      /* get loader since it will be needed later */
      if (FAILED(IStream_QueryInterface (pStm, &IID_IDirectMusicGetLoader, (LPVOID*)&pGetLoader))) {
            ERR(": stream not supported\n");
            return DMUS_E_UNSUPPORTED_STREAM;
      }
      IDirectMusicGetLoader_GetLoader (pGetLoader, &pLoader);
      IDirectMusicGetLoader_Release (pGetLoader);
      
      This->pStream = pStm;
      IStream_AddRef (pStm); /* add count for later references */
      
      /* start with load */
      IStream_Read (pStm, &Chunk, sizeof(FOURCC)+sizeof(DWORD), NULL);
      TRACE_(dmfile)(": %s chunk (size = 0x%08X)", debugstr_fourcc (Chunk.fccID), Chunk.dwSize);
      switch (Chunk.fccID) {  
            case FOURCC_RIFF: {
                  IStream_Read (pStm, &Chunk.fccID, sizeof(FOURCC), NULL);                      
                  TRACE_(dmfile)(": RIFF chunk of type %s", debugstr_fourcc(Chunk.fccID));
                  StreamSize = Chunk.dwSize - sizeof(FOURCC);
                  StreamCount = 0;
                  switch (Chunk.fccID) {
                        case DMUS_FOURCC_CONTAINER_FORM: {
                              TRACE_(dmfile)(": container form\n");
                              This->Desc.guidClass = CLSID_DirectMusicContainer;
                              This->Desc.dwValidData |= DMUS_OBJ_CLASS;
                              do {
                                    IStream_Read (pStm, &Chunk, sizeof(FOURCC)+sizeof(DWORD), NULL);
                                    StreamCount += sizeof(FOURCC) + sizeof(DWORD) + Chunk.dwSize;
                                    TRACE_(dmfile)(": %s chunk (size = 0x%08X)", debugstr_fourcc (Chunk.fccID), Chunk.dwSize);
                                    switch (Chunk.fccID) {
                                          case DMUS_FOURCC_CONTAINER_CHUNK: {
                                                TRACE_(dmfile)(": container header chunk\n");
                                                IStream_Read (pStm, &This->Header, Chunk.dwSize, NULL);
                                                TRACE_(dmdump)(": container header chunk:\n%s\n", debugstr_DMUS_IO_CONTAINER_HEADER(&This->Header));
                                                break;      
                                          }
                                          case DMUS_FOURCC_GUID_CHUNK: {
                                                TRACE_(dmfile)(": GUID chunk\n");
                                                IStream_Read (pStm, &This->Desc.guidObject, Chunk.dwSize, NULL);
                                                This->Desc.dwValidData |= DMUS_OBJ_OBJECT;
                                                TRACE_(dmdump)(": GUID: %s\n", debugstr_guid(&This->Desc.guidObject));
                                                break;
                                          }
                                          case DMUS_FOURCC_VERSION_CHUNK: {
                                                TRACE_(dmfile)(": version chunk\n");
                                                IStream_Read (pStm, &This->Desc.vVersion, Chunk.dwSize, NULL);
                                                This->Desc.dwValidData |= DMUS_OBJ_VERSION;
                                                TRACE_(dmdump)(": version: %s\n", debugstr_dmversion(&This->Desc.vVersion));
                                                break;
                                          }
                                          case DMUS_FOURCC_DATE_CHUNK: {
                                                TRACE_(dmfile)(": date chunk\n");
                                                IStream_Read (pStm, &This->Desc.ftDate, Chunk.dwSize, NULL);
                                                This->Desc.dwValidData |= DMUS_OBJ_DATE;
                                                TRACE_(dmdump)(": date: %s\n", debugstr_filetime(&This->Desc.ftDate));
                                                break;
                                          }                                         
                                          case DMUS_FOURCC_CATEGORY_CHUNK: {
                                                TRACE_(dmfile)(": category chunk\n");
                                                /* if it happens that string is too long,
                                                   read what we can and skip the rest*/
                                                if (Chunk.dwSize > DMUS_MAX_CATEGORY_SIZE) {
                                                      IStream_Read (pStm, This->Desc.wszCategory, DMUS_MAX_CATEGORY_SIZE, NULL);
                                                      liMove.QuadPart = Chunk.dwSize - DMUS_MAX_CATEGORY_SIZE;
                                                      IStream_Seek (pStm, liMove, STREAM_SEEK_CUR, NULL);
                                                } else {
                                                      IStream_Read (pStm, This->Desc.wszCategory, Chunk.dwSize, NULL);
                                                }
                                                This->Desc.dwValidData |= DMUS_OBJ_CATEGORY;
                                                TRACE_(dmdump)(": category: %s\n", debugstr_w(This->Desc.wszCategory));                                           
                                                break;
                                          }
                                          case FOURCC_LIST: {
                                                IStream_Read (pStm, &Chunk.fccID, sizeof(FOURCC), NULL);                      
                                                TRACE_(dmfile)(": LIST chunk of type %s", debugstr_fourcc(Chunk.fccID));
                                                ListSize[0] = Chunk.dwSize - sizeof(FOURCC);
                                                ListCount[0] = 0;
                                                switch (Chunk.fccID) {
                                                      case DMUS_FOURCC_UNFO_LIST: {
                                                            TRACE_(dmfile)(": UNFO list\n");
                                                            do {
                                                                  IStream_Read (pStm, &Chunk, sizeof(FOURCC)+sizeof(DWORD), NULL);
                                                                  ListCount[0] += sizeof(FOURCC) + sizeof(DWORD) + Chunk.dwSize;
                                                                  TRACE_(dmfile)(": %s chunk (size = 0x%08X)", debugstr_fourcc (Chunk.fccID), Chunk.dwSize);
                                                                  switch (Chunk.fccID) {
                                                                        /* don't ask me why, but M$ puts INFO elements in UNFO list sometimes
                                              (though strings seem to be valid unicode) */
                                                                        case mmioFOURCC('I','N','A','M'):
                                                                        case DMUS_FOURCC_UNAM_CHUNK: {
                                                                              TRACE_(dmfile)(": name chunk\n");
                                                                              /* if it happens that string is too long,
                                                                                 read what we can and skip the rest*/
                                                                              if (Chunk.dwSize > DMUS_MAX_NAME_SIZE) {
                                                                                    IStream_Read (pStm, This->Desc.wszName, DMUS_MAX_NAME_SIZE, NULL);
                                                                                    liMove.QuadPart = Chunk.dwSize - DMUS_MAX_NAME_SIZE;
                                                                                    IStream_Seek (pStm, liMove, STREAM_SEEK_CUR, NULL);
                                                                              } else {
                                                                                    IStream_Read (pStm, This->Desc.wszName, Chunk.dwSize, NULL);
                                                                              }
                                                                              This->Desc.dwValidData |= DMUS_OBJ_NAME;
                                                                              TRACE_(dmdump)(": name: %s\n", debugstr_w(This->Desc.wszName));
                                                                              break;
                                                                        }
                                                                        default: {
                                                                              TRACE_(dmfile)(": unknown chunk (irrevelant & skipping)\n");
                                                                              liMove.QuadPart = Chunk.dwSize;
                                                                              IStream_Seek (pStm, liMove, STREAM_SEEK_CUR, NULL);
                                                                              break;                                    
                                                                        }
                                                                  }
                                                                  TRACE_(dmfile)(": ListCount[0] = 0x%08X < ListSize[0] = 0x%08X\n", ListCount[0], ListSize[0]);
                                                            } while (ListCount[0] < ListSize[0]);
                                                            break;
                                                      }
                                                      case DMUS_FOURCC_CONTAINED_OBJECTS_LIST: {
                                                            TRACE_(dmfile)(": contained objects list\n");
                                                            do {
                                                                  IStream_Read (pStm, &Chunk, sizeof(FOURCC)+sizeof(DWORD), NULL);
                                                                  ListCount[0] += sizeof(FOURCC) + sizeof(DWORD) + Chunk.dwSize;
                                                                  TRACE_(dmfile)(": %s chunk (size = 0x%08X)", debugstr_fourcc (Chunk.fccID), Chunk.dwSize);
                                                                  switch (Chunk.fccID) {
                                                                        case FOURCC_LIST: {
                                                                              IStream_Read (pStm, &Chunk.fccID, sizeof(FOURCC), NULL);                      
                                                                              TRACE_(dmfile)(": LIST chunk of type %s", debugstr_fourcc(Chunk.fccID));
                                                                              ListSize[1] = Chunk.dwSize - sizeof(FOURCC);
                                                                              ListCount[1] = 0;
                                                                              switch (Chunk.fccID) {
                                                                                    case DMUS_FOURCC_CONTAINED_OBJECT_LIST: {
                                                                                          LPWINE_CONTAINER_ENTRY pNewEntry;
                                                                                          TRACE_(dmfile)(": contained object list\n");
                                                                                          pNewEntry = HeapAlloc (GetProcessHeap (), HEAP_ZERO_MEMORY, sizeof(WINE_CONTAINER_ENTRY));
                                                                                          DM_STRUCT_INIT(&pNewEntry->Desc);
                                                                                          do {
                                                                                                IStream_Read (pStm, &Chunk, sizeof(FOURCC)+sizeof(DWORD), NULL);
                                                                                                ListCount[1] += sizeof(FOURCC) + sizeof(DWORD) + Chunk.dwSize;
                                                                                                TRACE_(dmfile)(": %s chunk (size = 0x%08X)", debugstr_fourcc (Chunk.fccID), Chunk.dwSize);
                                                                                                switch (Chunk.fccID) {
                                                                                                      case DMUS_FOURCC_CONTAINED_ALIAS_CHUNK: {
                                                                                                            TRACE_(dmfile)(": alias chunk\n");
                                                                                                            pNewEntry->wszAlias = HeapAlloc (GetProcessHeap (), HEAP_ZERO_MEMORY, Chunk.dwSize);
                                                                                                            IStream_Read (pStm, pNewEntry->wszAlias, Chunk.dwSize, NULL);
                                                                                                            TRACE_(dmdump)(": alias: %s\n", debugstr_w(pNewEntry->wszAlias));
                                                                                                            break;
                                                                                                      }
                                                                                                      case DMUS_FOURCC_CONTAINED_OBJECT_CHUNK: {
                                                                                                            DMUS_IO_CONTAINED_OBJECT_HEADER tmpObjectHeader;
                                                                                                            TRACE_(dmfile)(": contained object header chunk\n");
                                                                                                            IStream_Read (pStm, &tmpObjectHeader, Chunk.dwSize, NULL);
                                                                                                            TRACE_(dmdump)(": contained object header: \n%s\n", debugstr_DMUS_IO_CONTAINED_OBJECT_HEADER(&tmpObjectHeader));
                                                                                                            /* copy guidClass */
                                                                                                            pNewEntry->Desc.dwValidData |= DMUS_OBJ_CLASS;
                                                                                                            pNewEntry->Desc.guidClass = tmpObjectHeader.guidClassID;
                                                                                                            /* store flags */
                                                                                                            pNewEntry->dwFlags = tmpObjectHeader.dwFlags;
                                                                                                            break;
                                                                                                      }
                                                                                                      /* now read data... it may be safe to read everything after object header chunk, 
                                                                                                            but I'm not comfortable with MSDN's "the header is *normally* followed by ..." */
                                                                                                      case FOURCC_LIST: {
                                                                                                            IStream_Read (pStm, &Chunk.fccID, sizeof(FOURCC), NULL);                      
                                                                                                            TRACE_(dmfile)(": LIST chunk of type %s", debugstr_fourcc(Chunk.fccID));
                                                                                                            ListSize[2] = Chunk.dwSize - sizeof(FOURCC);
                                                                                                            ListCount[2] = 0;
                                                                                                            switch (Chunk.fccID) {
                                                                                                                  case DMUS_FOURCC_REF_LIST: {
                                                                                                                        TRACE_(dmfile)(": reference list\n");
                                                                                                                        pNewEntry->bIsRIFF = 0;
                                                                                                                        do {
                                                                                                                              IStream_Read (pStm, &Chunk, sizeof(FOURCC)+sizeof(DWORD), NULL);
                                                                                                                              ListCount[2] += sizeof(FOURCC) + sizeof(DWORD) + Chunk.dwSize;
                                                                                                                              TRACE_(dmfile)(": %s chunk (size = 0x%08X)", debugstr_fourcc (Chunk.fccID), Chunk.dwSize);
                                                                                                                              switch (Chunk.fccID) {
                                                                                                                                    case DMUS_FOURCC_REF_CHUNK: {
                                                                                                                                          DMUS_IO_REFERENCE tmpReferenceHeader; /* temporary structure */
                                                                                                                                          TRACE_(dmfile)(": reference header chunk\n");
                                                                                                                                          memset (&tmpReferenceHeader, 0, sizeof(DMUS_IO_REFERENCE));
                                                                                                                                          IStream_Read (pStm, &tmpReferenceHeader, Chunk.dwSize, NULL);
                                                                                                                                          /* copy retrieved data to DMUS_OBJECTDESC */
                                                                                                                                          if (!IsEqualCLSID (&pNewEntry->Desc.guidClass, &tmpReferenceHeader.guidClassID)) ERR(": object header declares different CLSID than reference header?\n");
                                                                                                                                          /* it shouldn't be necessary to copy guidClass, since it was set in contained object header already...
                                                                                                                                             yet if they happen to be different, I'd rather stick to this one */
                                                                                                                                          pNewEntry->Desc.guidClass = tmpReferenceHeader.guidClassID;
                                                                                                                                          pNewEntry->Desc.dwValidData |= tmpReferenceHeader.dwValidData;
                                                                                                                                          break;                                                                                                      
                                                                                                                                    }
                                                                                                                                    case DMUS_FOURCC_GUID_CHUNK: {
                                                                                                                                          TRACE_(dmfile)(": guid chunk\n");
                                                                                                                                          /* no need to set flags since they were copied from reference header */
                                                                                                                                          IStream_Read (pStm, &pNewEntry->Desc.guidObject, Chunk.dwSize, NULL);
                                                                                                                                          break;
                                                                                                                                    }
                                                                                                                                    case DMUS_FOURCC_DATE_CHUNK: {
                                                                                                                                          TRACE_(dmfile)(": file date chunk\n");
                                                                                                                                          /* no need to set flags since they were copied from reference header */
                                                                                                                                          IStream_Read (pStm, &pNewEntry->Desc.ftDate, Chunk.dwSize, NULL);
                                                                                                                                          break;
                                                                                                                                    }
                                                                                                                                    case DMUS_FOURCC_NAME_CHUNK: {
                                                                                                                                          TRACE_(dmfile)(": name chunk\n");
                                                                                                                                          /* no need to set flags since they were copied from reference header */
                                                                                                                                          IStream_Read (pStm, pNewEntry->Desc.wszName, Chunk.dwSize, NULL);
                                                                                                                                          break;
                                                                                                                                    }
                                                                                                                                    case DMUS_FOURCC_FILE_CHUNK: {
                                                                                                                                          TRACE_(dmfile)(": file name chunk\n");
                                                                                                                                          /* no need to set flags since they were copied from reference header */
                                                                                                                                          IStream_Read (pStm, pNewEntry->Desc.wszFileName, Chunk.dwSize, NULL);
                                                                                                                                          break;
                                                                                                                                    }
                                                                                                                                    case DMUS_FOURCC_CATEGORY_CHUNK: {
                                                                                                                                          TRACE_(dmfile)(": category chunk\n");
                                                                                                                                          /* no need to set flags since they were copied from reference header */
                                                                                                                                          IStream_Read (pStm, pNewEntry->Desc.wszCategory, Chunk.dwSize, NULL);
                                                                                                                                          break;
                                                                                                                                    }
                                                                                                                                    case DMUS_FOURCC_VERSION_CHUNK: {
                                                                                                                                          TRACE_(dmfile)(": version chunk\n");
                                                                                                                                          /* no need to set flags since they were copied from reference header */
                                                                                                                                          IStream_Read (pStm, &pNewEntry->Desc.vVersion, Chunk.dwSize, NULL);
                                                                                                                                          break;
                                                                                                                                    }
                                                                                                                                    default: {
                                                                                                                                          TRACE_(dmfile)(": unknown chunk (skipping)\n");
                                                                                                                                          liMove.QuadPart = Chunk.dwSize;
                                                                                                                                          IStream_Seek (pStm, liMove, STREAM_SEEK_CUR, NULL); /* skip this chunk */
                                                                                                                                          break;
                                                                                                                                    }
                                                                                                                              }
                                                                                                                              TRACE_(dmfile)(": ListCount[2] = 0x%08X < ListSize[2] = 0x%08X\n", ListCount[2], ListSize[2]);
                                                                                                                        } while (ListCount[2] < ListSize[2]);
                                                                                                                        break;
                                                                                                                  }
                                                                                                                  default: {
                                                                                                                        TRACE_(dmfile)(": unexpected chunk; loading failed)\n");
                                                                                                                        return E_FAIL;
                                                                                                                  }
                                                                                                            }
                                                                                                            break;
                                                                                                      }
                                                                                                      
                                                                                                      case FOURCC_RIFF: {
                                                                                                            IStream_Read (pStm, &Chunk.fccID, sizeof(FOURCC), NULL);
                                                                                                            TRACE_(dmfile)(": RIFF chunk of type %s", debugstr_fourcc(Chunk.fccID));
                                                                                                            if (IS_VALID_DMFORM (Chunk.fccID)) {
                                                                                                                  TRACE_(dmfile)(": valid DMUSIC form\n");
                                                                                                                  pNewEntry->bIsRIFF = 1;
                                                                                                                  /* we'll have to skip whole RIFF chunk after SetObject is called */
                                                                                                                  liMove.QuadPart = 0;
                                                                                                                  IStream_Seek (pStm, liMove, STREAM_SEEK_CUR, &uliPos);
                                                                                                                  uliPos.QuadPart += (Chunk.dwSize - sizeof(FOURCC)); /* set uliPos at the end of RIFF chunk */                                                                                                               
                                                                                                                  /* move at the beginning of RIFF chunk */
                                                                                                                  liMove.QuadPart = 0;
                                                                                                                  liMove.QuadPart -= (sizeof(FOURCC)+sizeof(DWORD)+sizeof(FOURCC));
                                                                                                                  IStream_Seek (pStm, liMove, STREAM_SEEK_CUR, NULL);
                                                                                                                  /* put pointer to stream in descriptor */
                                                                                                                  pNewEntry->Desc.dwValidData |= DMUS_OBJ_STREAM;
                                                                                                                  pNewEntry->Desc.pStream = pStm; /* we don't have to worry about cloning, since SetObject will perform it */
                                                                                                                  /* wait till we get on the end of object list */
                                                                                                            } else {
                                                                                                                  TRACE_(dmfile)(": invalid DMUSIC form (skipping)\n");
                                                                                                                  liMove.QuadPart = Chunk.dwSize - sizeof(FOURCC);
                                                                                                                  IStream_Seek (pStm, liMove, STREAM_SEEK_CUR, NULL);
                                                                                                                  /* FIXME: should we return E_FAIL? */
                                                                                                            }
                                                                                                            break;
                                                                                                      }
                                                                                                      default: {
                                                                                                            TRACE_(dmfile)(": unknown chunk (irrevelant & skipping)\n");
                                                                                                            liMove.QuadPart = Chunk.dwSize;
                                                                                                            IStream_Seek (pStm, liMove, STREAM_SEEK_CUR, NULL);
                                                                                                            break;                                    
                                                                                                      }
                                                                                                }
                                                                                                TRACE_(dmfile)(": ListCount[1] = 0x%08X < ListSize[1] = 0x%08X\n", ListCount[1], ListSize[1]);
                                                                                          } while (ListCount[1] < ListSize[1]);
                                                                                          /* SetObject: this will fill descriptor with additional info      and add alias in loader's cache */
                                                                                          IDirectMusicLoader_SetObject (pLoader, &pNewEntry->Desc);
                                                                                          /* now that SetObject collected appropriate info into descriptor we can live happily ever after;
                                                                                             or not, since we have to clean evidence of loading through stream... *sigh*
                                                                                             and we have to skip rest of the chunk, if we loaded through RIFF */
                                                                                          if (pNewEntry->bIsRIFF) {
                                                                                                liMove.QuadPart = uliPos.QuadPart;
                                                                                                IStream_Seek (pStm, liMove, STREAM_SEEK_SET, NULL);
                                                                                                pNewEntry->Desc.dwValidData &= ~DMUS_OBJ_STREAM; /* clear flag (and with bitwise complement) */
                                                                                                pNewEntry->Desc.pStream = NULL;                                                                 
                                                                                          }
                                                                                          /* add entry to list of objects */
                                                                                          list_add_tail (This->pContainedObjects, &pNewEntry->entry);
                                                                                          break;
                                                                                    }
                                                                                    default: {
                                                                                          TRACE_(dmfile)(": unknown (skipping)\n");
                                                                                          liMove.QuadPart = Chunk.dwSize - sizeof(FOURCC);
                                                                                          IStream_Seek (pStm, liMove, STREAM_SEEK_CUR, NULL);
                                                                                          break;                                    
                                                                                    }
                                                                              }
                                                                              break;
                                                                        }
                                                                        default: {
                                                                              TRACE_(dmfile)(": unknown chunk (irrevelant & skipping)\n");
                                                                              liMove.QuadPart = Chunk.dwSize;
                                                                              IStream_Seek (pStm, liMove, STREAM_SEEK_CUR, NULL);
                                                                              break;                                    
                                                                        }
                                                                  }
                                                                  TRACE_(dmfile)(": ListCount[0] = 0x%08X < ListSize[0] = 0x%08X\n", ListCount[0], ListSize[0]);
                                                            } while (ListCount[0] < ListSize[0]);
                                                            break;
                                                      }                                                     
                                                      default: {
                                                            TRACE_(dmfile)(": unknown (skipping)\n");
                                                            liMove.QuadPart = Chunk.dwSize - sizeof(FOURCC);
                                                            IStream_Seek (pStm, liMove, STREAM_SEEK_CUR, NULL);
                                                            break;                                    
                                                      }
                                                }
                                                break;
                                          }     
                                          default: {
                                                TRACE_(dmfile)(": unknown chunk (irrevelant & skipping)\n");
                                                liMove.QuadPart = Chunk.dwSize;
                                                IStream_Seek (pStm, liMove, STREAM_SEEK_CUR, NULL);
                                                break;                                    
                                          }
                                    }
                                    TRACE_(dmfile)(": StreamCount[0] = 0x%08X < StreamSize[0] = 0x%08X\n", StreamCount, StreamSize);
                              } while (StreamCount < StreamSize);
                              break;
                        }
                        default: {
                              TRACE_(dmfile)(": unexpected chunk; loading failed)\n");
                              liMove.QuadPart = StreamSize;
                              IStream_Seek (pStm, liMove, STREAM_SEEK_CUR, NULL); /* skip the rest of the chunk */
                              return E_FAIL;
                        }
                  }
                  TRACE_(dmfile)(": reading finished\n");
                  This->Desc.dwValidData |= DMUS_OBJ_LOADED;
                  break;
            }
            default: {
                  TRACE_(dmfile)(": unexpected chunk; loading failed)\n");
                  liMove.QuadPart = Chunk.dwSize;
                  IStream_Seek (pStm, liMove, STREAM_SEEK_CUR, NULL); /* skip the rest of the chunk */
                  return E_FAIL;
            }
      }
      
      /* now, if DMUS_CONTAINER_NOLOADS is not set, we are supposed to load contained objects;
         so when we call GetObject later, they'll already be in cache */
      if (!(This->Header.dwFlags & DMUS_CONTAINER_NOLOADS)) {
            struct list *pEntry;
            LPWINE_CONTAINER_ENTRY pContainedObject;

            TRACE(": DMUS_CONTAINER_NOLOADS not set... load all objects\n");
            
            LIST_FOR_EACH (pEntry, This->pContainedObjects) {
                  IDirectMusicObject* pObject;
                  pContainedObject = LIST_ENTRY (pEntry, WINE_CONTAINER_ENTRY, entry);          
                  /* get object from loader and then release it */
                  if (SUCCEEDED(IDirectMusicLoader_GetObject (pLoader, &pContainedObject->Desc, &IID_IDirectMusicObject, (LPVOID*)&pObject))) {
                        pContainedObject->pObject = pObject; /* for final release */
                        IDirectMusicObject_Release (pObject); /* we don't really need this one */
                  } else {
                        WARN(": failed to load contained object\n");
                        result = DMUS_S_PARTIALLOAD;
                  }
            }
      }
      
      IDirectMusicLoader_Release (pLoader); /* release loader */

#if 0
      /* DEBUG: dumps whole container object tree: */
      if (TRACE_ON(dmloader)) {
            int r = 0;
            LPWINE_CONTAINER_ENTRY tmpEntry;
            struct list *listEntry;

            TRACE("*** IDirectMusicContainer (%p) ***\n", This->ContainerVtbl);
            TRACE(" - Objects:\n");
            LIST_FOR_EACH (listEntry, This->pContainedObjects) {
                  tmpEntry = LIST_ENTRY( listEntry, WINE_CONTAINER_ENTRY, entry );
                  TRACE("    - Object[%i]:\n", r);
                  TRACE("       - wszAlias: %s\n", debugstr_w(tmpEntry->wszAlias));
                  TRACE("       - Object descriptor:\n%s\n", debugstr_DMUS_OBJECTDESC(&tmpEntry->Desc));
                  r++;
            }
      }
#endif

      return result;
}

static HRESULT WINAPI IDirectMusicContainerImpl_IPersistStream_Save (LPPERSISTSTREAM iface, IStream* pStm, BOOL fClearDirty) {
      ERR(": should not be needed\n");
      return E_NOTIMPL;
}

static HRESULT WINAPI IDirectMusicContainerImpl_IPersistStream_GetSizeMax (LPPERSISTSTREAM iface, ULARGE_INTEGER* pcbSize) {
      ERR(": should not be needed\n");
      return E_NOTIMPL;
}

static const IPersistStreamVtbl DirectMusicContainer_PersistStream_Vtbl = {
      IDirectMusicContainerImpl_IPersistStream_QueryInterface,
      IDirectMusicContainerImpl_IPersistStream_AddRef,
      IDirectMusicContainerImpl_IPersistStream_Release,
      IDirectMusicContainerImpl_IPersistStream_GetClassID,
      IDirectMusicContainerImpl_IPersistStream_IsDirty,
      IDirectMusicContainerImpl_IPersistStream_Load,
      IDirectMusicContainerImpl_IPersistStream_Save,
      IDirectMusicContainerImpl_IPersistStream_GetSizeMax
};

/* for ClassFactory */
HRESULT WINAPI DMUSIC_CreateDirectMusicContainerImpl (LPCGUID lpcGUID, LPVOID* ppobj, LPUNKNOWN pUnkOuter) {
      IDirectMusicContainerImpl* obj;

      obj = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(IDirectMusicContainerImpl));
      if (NULL == obj) {
            *ppobj = NULL;
            return E_OUTOFMEMORY;
      }
      obj->ContainerVtbl = &DirectMusicContainer_Container_Vtbl;
      obj->ObjectVtbl = &DirectMusicContainer_Object_Vtbl;
      obj->PersistStreamVtbl = &DirectMusicContainer_PersistStream_Vtbl;
      obj->dwRef = 0; /* will be inited by QueryInterface */
      obj->pContainedObjects = HeapAlloc (GetProcessHeap (), HEAP_ZERO_MEMORY, sizeof(struct list));
      list_init (obj->pContainedObjects);

      /* increase number of instances */
      InterlockedIncrement (&dwDirectMusicContainer);
      
      return IDirectMusicContainerImpl_IDirectMusicContainer_QueryInterface ((LPDIRECTMUSICCONTAINER)&obj->ContainerVtbl, lpcGUID, ppobj);
}

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