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audiopath.c

/* IDirectMusicAudioPath Implementation
 *
 * 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 General Public License as published by
 * the Free Software Foundation; either version 2 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 Library General Public License for more details.
 *
 * You should have received a copy of the GNU 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 "dmime_private.h"

WINE_DEFAULT_DEBUG_CHANNEL(dmime);
WINE_DECLARE_DEBUG_CHANNEL(dmfile);

/*****************************************************************************
 * IDirectMusicAudioPathImpl implementation
 */
/* IDirectMusicAudioPath IUnknown part: */
static HRESULT WINAPI IDirectMusicAudioPathImpl_IUnknown_QueryInterface (LPUNKNOWN iface, REFIID riid, LPVOID *ppobj) {
      ICOM_THIS_MULTI(IDirectMusicAudioPathImpl, UnknownVtbl, iface);
      TRACE("(%p, %s, %p)\n", This, debugstr_dmguid(riid), ppobj);

      if (IsEqualIID (riid, &IID_IUnknown)) {
            *ppobj = (LPVOID)&This->UnknownVtbl;
            IUnknown_AddRef (iface);
            return S_OK;      
      } else if (IsEqualIID (riid, &IID_IDirectMusicAudioPath)) {
            *ppobj = (LPVOID)&This->AudioPathVtbl;
            IUnknown_AddRef (iface);
            return S_OK;
      } else if (IsEqualIID (riid, &IID_IDirectMusicObject)) {
            *ppobj = (LPVOID)&This->ObjectVtbl;
            IUnknown_AddRef (iface);
            return S_OK;
      } else if (IsEqualIID (riid, &IID_IPersistStream)) {
            *ppobj = (LPVOID)&This->PersistStreamVtbl;
            IUnknown_AddRef (iface);
            return S_OK;
      }
      
      WARN("(%p, %s, %p): not found\n", This, debugstr_dmguid(riid), ppobj);
      return E_NOINTERFACE;
}

static ULONG WINAPI IDirectMusicAudioPathImpl_IUnknown_AddRef (LPUNKNOWN iface) {
      ICOM_THIS_MULTI(IDirectMusicAudioPathImpl, UnknownVtbl, iface);
        ULONG ref = InterlockedIncrement(&This->ref);

      TRACE("(%p): AddRef from %d\n", This, ref - 1);

      DMIME_LockModule();

      return ref;
}

static ULONG WINAPI IDirectMusicAudioPathImpl_IUnknown_Release (LPUNKNOWN iface) {
  ICOM_THIS_MULTI(IDirectMusicAudioPathImpl, UnknownVtbl, iface);
  ULONG ref = InterlockedDecrement(&This->ref);
  TRACE("(%p): ReleaseRef to %d\n", This, ref);
  
  if (ref == 0) {
    if (This->pDSBuffer) {
      IDirectSoundBuffer8_Release(This->pDSBuffer);
    }
    HeapFree(GetProcessHeap(), 0, This);
  }

  DMIME_UnlockModule();
  
  return ref;
}

static const IUnknownVtbl DirectMusicAudioPath_Unknown_Vtbl = {
      IDirectMusicAudioPathImpl_IUnknown_QueryInterface,
      IDirectMusicAudioPathImpl_IUnknown_AddRef,
      IDirectMusicAudioPathImpl_IUnknown_Release
};

/* IDirectMusicAudioPathImpl IDirectMusicAudioPath part: */
static HRESULT WINAPI IDirectMusicAudioPathImpl_IDirectMusicAudioPath_QueryInterface (LPDIRECTMUSICAUDIOPATH iface, REFIID riid, LPVOID *ppobj) {
      ICOM_THIS_MULTI(IDirectMusicAudioPathImpl, AudioPathVtbl, iface);
      return IUnknown_QueryInterface ((LPUNKNOWN)&This->UnknownVtbl, riid, ppobj);
}

static ULONG WINAPI IDirectMusicAudioPathImpl_IDirectMusicAudioPath_AddRef (LPDIRECTMUSICAUDIOPATH iface) {
      ICOM_THIS_MULTI(IDirectMusicAudioPathImpl, AudioPathVtbl, iface);
      return IUnknown_AddRef ((LPUNKNOWN)&This->UnknownVtbl);
}

static ULONG WINAPI IDirectMusicAudioPathImpl_IDirectMusicAudioPath_Release (LPDIRECTMUSICAUDIOPATH iface) {
      ICOM_THIS_MULTI(IDirectMusicAudioPathImpl, AudioPathVtbl, iface);
      return IUnknown_Release ((LPUNKNOWN)&This->UnknownVtbl);
}

static HRESULT WINAPI IDirectMusicAudioPathImpl_IDirectMusicAudioPath_GetObjectInPath (LPDIRECTMUSICAUDIOPATH iface, DWORD dwPChannel, DWORD dwStage, DWORD dwBuffer, REFGUID guidObject, WORD dwIndex, REFGUID iidInterface, void** ppObject) {
      ICOM_THIS_MULTI(IDirectMusicAudioPathImpl, AudioPathVtbl, iface);

      FIXME("(%p, %d, %d, %d, %s, %d, %s, %p): stub\n", This, dwPChannel, dwStage, dwBuffer, debugstr_dmguid(guidObject), dwIndex, debugstr_dmguid(iidInterface), ppObject);
          
      switch (dwStage) {
      case DMUS_PATH_BUFFER:
        {
          if (IsEqualIID (iidInterface, &IID_IDirectSoundBuffer8)) {
            IDirectSoundBuffer8_QueryInterface (This->pDSBuffer, &IID_IDirectSoundBuffer8, ppObject);
            TRACE("returning %p\n",*ppObject);
            return S_OK;
          } else if (IsEqualIID (iidInterface, &IID_IDirectSound3DBuffer)) {
            IDirectSoundBuffer8_QueryInterface (This->pDSBuffer, &IID_IDirectSound3DBuffer, ppObject);
            TRACE("returning %p\n",*ppObject);
            return S_OK;
          } else {
            FIXME("Bad iid\n");
          }
        }
        break;

      case DMUS_PATH_PRIMARY_BUFFER: {
        if (IsEqualIID (iidInterface, &IID_IDirectSound3DListener)) {
          IDirectSoundBuffer8_QueryInterface (This->pPrimary, &IID_IDirectSound3DListener, ppObject);
          return S_OK;
        } else {
          FIXME("bad iid...\n");
        }
      }
      break;

      case DMUS_PATH_AUDIOPATH_GRAPH:
        {
          if (IsEqualIID (iidInterface, &IID_IDirectMusicGraph)) {
            if (NULL == This->pToolGraph) {
            IDirectMusicGraphImpl* pGraph;
            DMUSIC_CreateDirectMusicGraphImpl (&IID_IDirectMusicGraph, (LPVOID*)&pGraph, NULL);
            This->pToolGraph = (IDirectMusicGraph*) pGraph;
            }
            *ppObject = (LPDIRECTMUSICGRAPH) This->pToolGraph; 
            IDirectMusicGraph_AddRef((LPDIRECTMUSICGRAPH) *ppObject);
            return S_OK;
          }
        }
        break;

      case DMUS_PATH_AUDIOPATH_TOOL:
        {
          /* TODO */
        }
        break;

      case DMUS_PATH_PERFORMANCE:
        {
          /* TODO check wanted GUID */
          *ppObject = (LPDIRECTMUSICPERFORMANCE8) This->pPerf; 
          IUnknown_AddRef((LPUNKNOWN) *ppObject);
          return S_OK;
        }
        break;

      case DMUS_PATH_PERFORMANCE_GRAPH:
        {
          IDirectMusicGraph* pPerfoGraph = NULL; 
          IDirectMusicPerformance8_GetGraph((LPDIRECTMUSICPERFORMANCE8) This->pPerf, &pPerfoGraph);
          if (NULL == pPerfoGraph) {
            IDirectMusicGraphImpl* pGraph = NULL; 
            DMUSIC_CreateDirectMusicGraphImpl (&IID_IDirectMusicGraph, (LPVOID*)&pGraph, NULL);             
            IDirectMusicPerformance8_SetGraph((LPDIRECTMUSICPERFORMANCE8) This->pPerf, (IDirectMusicGraph*) pGraph);
            /* we need release as SetGraph do an AddRef */
            IDirectMusicGraph_Release((LPDIRECTMUSICGRAPH) pGraph);
            pPerfoGraph = (LPDIRECTMUSICGRAPH) pGraph;
          }
          *ppObject = (LPDIRECTMUSICGRAPH) pPerfoGraph; 
          return S_OK;
        }
        break;

      case DMUS_PATH_PERFORMANCE_TOOL:
      default:
        break;
      }

      *ppObject = NULL;
      return E_INVALIDARG;
}

static HRESULT WINAPI IDirectMusicAudioPathImpl_IDirectMusicAudioPath_Activate (LPDIRECTMUSICAUDIOPATH iface, BOOL fActivate) {
  ICOM_THIS_MULTI(IDirectMusicAudioPathImpl, AudioPathVtbl, iface);
  FIXME("(%p, %d): stub\n", This, fActivate);
  if (!fActivate) {
    if (!This->fActive) return S_OK;
    This->fActive = FALSE;
  } else {
    if (This->fActive) return S_OK;
    This->fActive = TRUE;
    if (NULL != This->pDSBuffer) {
      IDirectSoundBuffer_Stop(This->pDSBuffer);
    }
  }
  return S_OK;
}

static HRESULT WINAPI IDirectMusicAudioPathImpl_IDirectMusicAudioPath_SetVolume (LPDIRECTMUSICAUDIOPATH iface, long lVolume, DWORD dwDuration) {
  ICOM_THIS_MULTI(IDirectMusicAudioPathImpl, AudioPathVtbl, iface);
  FIXME("(%p, %li, %d): stub\n", This, lVolume, dwDuration);
  return S_OK;
}

static HRESULT WINAPI IDirectMusicAudioPathImpl_IDirectMusicAudioPath_ConvertPChannel (LPDIRECTMUSICAUDIOPATH iface, DWORD dwPChannelIn, DWORD* pdwPChannelOut) {
  ICOM_THIS_MULTI(IDirectMusicAudioPathImpl, AudioPathVtbl, iface);
  FIXME("(%p, %d, %p): stub\n", This, dwPChannelIn, pdwPChannelOut);
  return S_OK;
}

static const IDirectMusicAudioPathVtbl DirectMusicAudioPath_AudioPath_Vtbl = {
  IDirectMusicAudioPathImpl_IDirectMusicAudioPath_QueryInterface,
  IDirectMusicAudioPathImpl_IDirectMusicAudioPath_AddRef,
  IDirectMusicAudioPathImpl_IDirectMusicAudioPath_Release,
  IDirectMusicAudioPathImpl_IDirectMusicAudioPath_GetObjectInPath,
  IDirectMusicAudioPathImpl_IDirectMusicAudioPath_Activate,
  IDirectMusicAudioPathImpl_IDirectMusicAudioPath_SetVolume,
  IDirectMusicAudioPathImpl_IDirectMusicAudioPath_ConvertPChannel
};

/* IDirectMusicAudioPathImpl IDirectMusicObject part: */
static HRESULT WINAPI IDirectMusicAudioPathImpl_IDirectMusicObject_QueryInterface (LPDIRECTMUSICOBJECT iface, REFIID riid, LPVOID *ppobj) {
  ICOM_THIS_MULTI(IDirectMusicAudioPathImpl, ObjectVtbl, iface);
  return IUnknown_QueryInterface ((LPUNKNOWN)&This->UnknownVtbl, riid, ppobj);
}

static ULONG WINAPI IDirectMusicAudioPathImpl_IDirectMusicObject_AddRef (LPDIRECTMUSICOBJECT iface) {
  ICOM_THIS_MULTI(IDirectMusicAudioPathImpl, ObjectVtbl, iface);
  return IUnknown_AddRef ((LPUNKNOWN)&This->UnknownVtbl);
}

static ULONG WINAPI IDirectMusicAudioPathImpl_IDirectMusicObject_Release (LPDIRECTMUSICOBJECT iface) {
  ICOM_THIS_MULTI(IDirectMusicAudioPathImpl, ObjectVtbl, iface);
  return IUnknown_Release ((LPUNKNOWN)&This->UnknownVtbl);
}

static HRESULT WINAPI IDirectMusicAudioPathImpl_IDirectMusicObject_GetDescriptor (LPDIRECTMUSICOBJECT iface, LPDMUS_OBJECTDESC pDesc) {
  ICOM_THIS_MULTI(IDirectMusicAudioPathImpl, ObjectVtbl, iface);
  TRACE("(%p, %p)\n", This, pDesc);
  /* I think we shouldn't return pointer here since then values can be changed; it'd be a mess */
  memcpy (pDesc, This->pDesc, This->pDesc->dwSize);
  return S_OK;
}

static HRESULT WINAPI IDirectMusicAudioPathImpl_IDirectMusicObject_SetDescriptor (LPDIRECTMUSICOBJECT iface, LPDMUS_OBJECTDESC pDesc) {
      ICOM_THIS_MULTI(IDirectMusicAudioPathImpl, ObjectVtbl, iface);
      TRACE("(%p, %p): setting descriptor:\n%s\n", This, pDesc, debugstr_DMUS_OBJECTDESC (pDesc));
      
      /* According to MSDN, we should copy only given values, not whole struct */   
      if (pDesc->dwValidData & DMUS_OBJ_OBJECT)
            memcpy (&This->pDesc->guidObject, &pDesc->guidObject, sizeof (pDesc->guidObject));
      if (pDesc->dwValidData & DMUS_OBJ_CLASS)
            memcpy (&This->pDesc->guidClass, &pDesc->guidClass, sizeof (pDesc->guidClass));           
      if (pDesc->dwValidData & DMUS_OBJ_NAME)
            lstrcpynW (This->pDesc->wszName, pDesc->wszName, DMUS_MAX_NAME);
      if (pDesc->dwValidData & DMUS_OBJ_CATEGORY)
            lstrcpynW (This->pDesc->wszCategory, pDesc->wszCategory, DMUS_MAX_CATEGORY);
      if (pDesc->dwValidData & DMUS_OBJ_FILENAME)
            lstrcpynW (This->pDesc->wszFileName, pDesc->wszFileName, DMUS_MAX_FILENAME);
      if (pDesc->dwValidData & DMUS_OBJ_VERSION)
            memcpy (&This->pDesc->vVersion, &pDesc->vVersion, sizeof (pDesc->vVersion));                    
      if (pDesc->dwValidData & DMUS_OBJ_DATE)
            memcpy (&This->pDesc->ftDate, &pDesc->ftDate, sizeof (pDesc->ftDate));                    
      if (pDesc->dwValidData & DMUS_OBJ_MEMORY) {
            memcpy (&This->pDesc->llMemLength, &pDesc->llMemLength, sizeof (pDesc->llMemLength));                       
            memcpy (This->pDesc->pbMemData, pDesc->pbMemData, sizeof (pDesc->pbMemData));
      }
      if (pDesc->dwValidData & DMUS_OBJ_STREAM) {
            /* according to MSDN, we copy the stream */
            IStream_Clone (pDesc->pStream, &This->pDesc->pStream);      
      }
      
      /* add new flags */
      This->pDesc->dwValidData |= pDesc->dwValidData;

      return S_OK;
}

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

      TRACE("(%p, %p, %p)\n", This, pStream, pDesc);
      
      /* FIXME: should this be determined from stream? */
      pDesc->dwValidData |= DMUS_OBJ_CLASS;
      memcpy (&pDesc->guidClass, &CLSID_DirectMusicAudioPath, sizeof(CLSID));
      
      IStream_Read (pStream, &Chunk, sizeof(FOURCC)+sizeof(DWORD), NULL);
      TRACE_(dmfile)(": %s chunk (size = 0x%04x)", 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_AUDIOPATH_FORM) {
                        TRACE_(dmfile)(": audio path form\n");
                        do {
                              IStream_Read (pStream, &Chunk, sizeof(FOURCC)+sizeof(DWORD), NULL);
                              StreamCount += sizeof(FOURCC) + sizeof(DWORD) + Chunk.dwSize;
                              TRACE_(dmfile)(": %s chunk (size = 0x%04x)", 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);
                                          break;
                                    }
                                    case DMUS_FOURCC_VERSION_CHUNK: {
                                          TRACE_(dmfile)(": version chunk\n");
                                          pDesc->dwValidData |= DMUS_OBJ_VERSION;
                                          IStream_Read (pStream, &pDesc->vVersion, Chunk.dwSize, NULL);
                                          break;
                                    }
                                    case DMUS_FOURCC_CATEGORY_CHUNK: {
                                          TRACE_(dmfile)(": category chunk\n");
                                          pDesc->dwValidData |= DMUS_OBJ_CATEGORY;
                                          IStream_Read (pStream, pDesc->wszCategory, Chunk.dwSize, NULL);
                                          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%04x)", 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");
                                                                        pDesc->dwValidData |= DMUS_OBJ_NAME;
                                                                        IStream_Read (pStream, pDesc->wszName, Chunk.dwSize, NULL);
                                                                        break;
                                                                  }
                                                                  case mmioFOURCC('I','A','R','T'):
                                                                  case DMUS_FOURCC_UART_CHUNK: {
                                                                        TRACE_(dmfile)(": artist chunk (ignored)\n");
                                                                        liMove.QuadPart = Chunk.dwSize;
                                                                        IStream_Seek (pStream, liMove, STREAM_SEEK_CUR, NULL);
                                                                        break;
                                                                  }
                                                                  case mmioFOURCC('I','C','O','P'):
                                                                  case DMUS_FOURCC_UCOP_CHUNK: {
                                                                        TRACE_(dmfile)(": copyright chunk (ignored)\n");
                                                                        liMove.QuadPart = Chunk.dwSize;
                                                                        IStream_Seek (pStream, liMove, STREAM_SEEK_CUR, NULL);
                                                                        break;
                                                                  }
                                                                  case mmioFOURCC('I','S','B','J'):
                                                                  case DMUS_FOURCC_USBJ_CHUNK: {
                                                                        TRACE_(dmfile)(": subject chunk (ignored)\n");
                                                                        liMove.QuadPart = Chunk.dwSize;
                                                                        IStream_Seek (pStream, liMove, STREAM_SEEK_CUR, NULL);
                                                                        break;
                                                                  }
                                                                  case mmioFOURCC('I','C','M','T'):
                                                                  case DMUS_FOURCC_UCMT_CHUNK: {
                                                                        TRACE_(dmfile)(": comment chunk (ignored)\n");
                                                                        liMove.QuadPart = Chunk.dwSize;
                                                                        IStream_Seek (pStream, liMove, STREAM_SEEK_CUR, NULL);
                                                                        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] = %d < ListSize[0] = %d\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] = %d < StreamSize[0] = %d\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 DirectMusicAudioPath_Object_Vtbl = {
      IDirectMusicAudioPathImpl_IDirectMusicObject_QueryInterface,
      IDirectMusicAudioPathImpl_IDirectMusicObject_AddRef,
      IDirectMusicAudioPathImpl_IDirectMusicObject_Release,
      IDirectMusicAudioPathImpl_IDirectMusicObject_GetDescriptor,
      IDirectMusicAudioPathImpl_IDirectMusicObject_SetDescriptor,
      IDirectMusicAudioPathImpl_IDirectMusicObject_ParseDescriptor
};

/* IDirectMusicAudioPathImpl IPersistStream part: */
static HRESULT WINAPI IDirectMusicAudioPathImpl_IPersistStream_QueryInterface (LPPERSISTSTREAM iface, REFIID riid, LPVOID *ppobj) {
      ICOM_THIS_MULTI(IDirectMusicAudioPathImpl, PersistStreamVtbl, iface);
      return IUnknown_QueryInterface ((LPUNKNOWN)&This->UnknownVtbl, riid, ppobj);
}

static ULONG WINAPI IDirectMusicAudioPathImpl_IPersistStream_AddRef (LPPERSISTSTREAM iface) {
      ICOM_THIS_MULTI(IDirectMusicAudioPathImpl, PersistStreamVtbl, iface);
      return IUnknown_AddRef ((LPUNKNOWN)&This->UnknownVtbl);
}

static ULONG WINAPI IDirectMusicAudioPathImpl_IPersistStream_Release (LPPERSISTSTREAM iface) {
      ICOM_THIS_MULTI(IDirectMusicAudioPathImpl, PersistStreamVtbl, iface);
      return IUnknown_Release ((LPUNKNOWN)&This->UnknownVtbl);
}

static HRESULT WINAPI IDirectMusicAudioPathImpl_IPersistStream_GetClassID (LPPERSISTSTREAM iface, CLSID* pClassID) {
      return E_NOTIMPL;
}

static HRESULT WINAPI IDirectMusicAudioPathImpl_IPersistStream_IsDirty (LPPERSISTSTREAM iface) {
      return E_NOTIMPL;
}

static HRESULT WINAPI IDirectMusicAudioPathImpl_IPersistStream_Load (LPPERSISTSTREAM iface, IStream* pStm) {
      ICOM_THIS_MULTI(IDirectMusicAudioPathImpl, PersistStreamVtbl, iface);

      FOURCC chunkID;
      DWORD chunkSize, StreamSize, StreamCount, ListSize[3], ListCount[3];
      LARGE_INTEGER liMove; /* used when skipping chunks */

      FIXME("(%p, %p): Loading not implemented yet\n", This, pStm);
      IStream_Read (pStm, &chunkID, sizeof(FOURCC), NULL);
      IStream_Read (pStm, &chunkSize, sizeof(DWORD), NULL);
      TRACE_(dmfile)(": %s chunk (size = %d)", debugstr_fourcc (chunkID), chunkSize);
      switch (chunkID) {      
            case FOURCC_RIFF: {
                  IStream_Read (pStm, &chunkID, sizeof(FOURCC), NULL);                    
                  TRACE_(dmfile)(": RIFF chunk of type %s", debugstr_fourcc(chunkID));
                  StreamSize = chunkSize - sizeof(FOURCC);
                  StreamCount = 0;
                  switch (chunkID) {
                        case DMUS_FOURCC_AUDIOPATH_FORM: {
                              TRACE_(dmfile)(": audio path form\n");
                              do {
                                    IStream_Read (pStm, &chunkID, sizeof(FOURCC), NULL);
                                    IStream_Read (pStm, &chunkSize, sizeof(FOURCC), NULL);
                                    StreamCount += sizeof(FOURCC) + sizeof(DWORD) + chunkSize;
                                    TRACE_(dmfile)(": %s chunk (size = %d)", debugstr_fourcc (chunkID), chunkSize);
                                    switch (chunkID) {
                                          case DMUS_FOURCC_GUID_CHUNK: {
                                                TRACE_(dmfile)(": GUID chunk\n");
                                                This->pDesc->dwValidData |= DMUS_OBJ_OBJECT;
                                                IStream_Read (pStm, &This->pDesc->guidObject, chunkSize, NULL);
                                                break;
                                          }
                                          case DMUS_FOURCC_VERSION_CHUNK: {
                                                TRACE_(dmfile)(": version chunk\n");
                                                This->pDesc->dwValidData |= DMUS_OBJ_VERSION;
                                                IStream_Read (pStm, &This->pDesc->vVersion, chunkSize, NULL);
                                                break;
                                          }
                                          case DMUS_FOURCC_CATEGORY_CHUNK: {
                                                TRACE_(dmfile)(": category chunk\n");
                                                This->pDesc->dwValidData |= DMUS_OBJ_CATEGORY;
                                                IStream_Read (pStm, This->pDesc->wszCategory, chunkSize, NULL);
                                                break;
                                          }
                                          case FOURCC_LIST: {
                                                IStream_Read (pStm, &chunkID, sizeof(FOURCC), NULL);                    
                                                TRACE_(dmfile)(": LIST chunk of type %s", debugstr_fourcc(chunkID));
                                                ListSize[0] = chunkSize - sizeof(FOURCC);
                                                ListCount[0] = 0;
                                                switch (chunkID) {
                                                      case DMUS_FOURCC_UNFO_LIST: {
                                                            TRACE_(dmfile)(": UNFO list\n");
                                                            do {
                                                                  IStream_Read (pStm, &chunkID, sizeof(FOURCC), NULL);
                                                                  IStream_Read (pStm, &chunkSize, sizeof(FOURCC), NULL);
                                                                  ListCount[0] += sizeof(FOURCC) + sizeof(DWORD) + chunkSize;
                                                                  TRACE_(dmfile)(": %s chunk (size = %d)", debugstr_fourcc (chunkID), chunkSize);
                                                                  switch (chunkID) {
                                                                        /* 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");
                                                                              This->pDesc->dwValidData |= DMUS_OBJ_NAME;
                                                                              IStream_Read (pStm, This->pDesc->wszName, chunkSize, NULL);
                                                                              break;
                                                                        }
                                                                        case mmioFOURCC('I','A','R','T'):
                                                                        case DMUS_FOURCC_UART_CHUNK: {
                                                                              TRACE_(dmfile)(": artist chunk (ignored)\n");
                                                                              liMove.QuadPart = chunkSize;
                                                                              IStream_Seek (pStm, liMove, STREAM_SEEK_CUR, NULL);
                                                                              break;
                                                                        }
                                                                        case mmioFOURCC('I','C','O','P'):
                                                                        case DMUS_FOURCC_UCOP_CHUNK: {
                                                                              TRACE_(dmfile)(": copyright chunk (ignored)\n");
                                                                              liMove.QuadPart = chunkSize;
                                                                              IStream_Seek (pStm, liMove, STREAM_SEEK_CUR, NULL);
                                                                              break;
                                                                        }
                                                                        case mmioFOURCC('I','S','B','J'):
                                                                        case DMUS_FOURCC_USBJ_CHUNK: {
                                                                              TRACE_(dmfile)(": subject chunk (ignored)\n");
                                                                              liMove.QuadPart = chunkSize;
                                                                              IStream_Seek (pStm, liMove, STREAM_SEEK_CUR, NULL);
                                                                              break;
                                                                        }
                                                                        case mmioFOURCC('I','C','M','T'):
                                                                        case DMUS_FOURCC_UCMT_CHUNK: {
                                                                              TRACE_(dmfile)(": comment chunk (ignored)\n");
                                                                              liMove.QuadPart = chunkSize;
                                                                              IStream_Seek (pStm, liMove, STREAM_SEEK_CUR, NULL);
                                                                              break;
                                                                        }
                                                                        default: {
                                                                              TRACE_(dmfile)(": unknown chunk (irrevelant & skipping)\n");
                                                                              liMove.QuadPart = chunkSize;
                                                                              IStream_Seek (pStm, liMove, STREAM_SEEK_CUR, NULL);
                                                                              break;                                    
                                                                        }
                                                                  }
                                                                  TRACE_(dmfile)(": ListCount[0] = %d < ListSize[0] = %d\n", ListCount[0], ListSize[0]);
                                                            } while (ListCount[0] < ListSize[0]);
                                                            break;
                                                      }
                                                      default: {
                                                            TRACE_(dmfile)(": unknown (skipping)\n");
                                                            liMove.QuadPart = chunkSize - sizeof(FOURCC);
                                                            IStream_Seek (pStm, liMove, STREAM_SEEK_CUR, NULL);
                                                            break;                                    
                                                      }
                                                }
                                                break;
                                          }     
                                          default: {
                                                TRACE_(dmfile)(": unknown chunk (irrevelant & skipping)\n");
                                                liMove.QuadPart = chunkSize;
                                                IStream_Seek (pStm, liMove, STREAM_SEEK_CUR, NULL);
                                                break;                                    
                                          }
                                    }
                                    TRACE_(dmfile)(": StreamCount[0] = %d < StreamSize[0] = %d\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");
                  break;
            }
            default: {
                  TRACE_(dmfile)(": unexpected chunk; loading failed)\n");
                  liMove.QuadPart = chunkSize;
                  IStream_Seek (pStm, liMove, STREAM_SEEK_CUR, NULL); /* skip the rest of the chunk */
                  return E_FAIL;
            }
      }

      return S_OK;
}

static HRESULT WINAPI IDirectMusicAudioPathImpl_IPersistStream_Save (LPPERSISTSTREAM iface, IStream* pStm, BOOL fClearDirty) {
      return E_NOTIMPL;
}

static HRESULT WINAPI IDirectMusicAudioPathImpl_IPersistStream_GetSizeMax (LPPERSISTSTREAM iface, ULARGE_INTEGER* pcbSize) {
      return E_NOTIMPL;
}

static const IPersistStreamVtbl DirectMusicAudioPath_PersistStream_Vtbl = {
      IDirectMusicAudioPathImpl_IPersistStream_QueryInterface,
      IDirectMusicAudioPathImpl_IPersistStream_AddRef,
      IDirectMusicAudioPathImpl_IPersistStream_Release,
      IDirectMusicAudioPathImpl_IPersistStream_GetClassID,
      IDirectMusicAudioPathImpl_IPersistStream_IsDirty,
      IDirectMusicAudioPathImpl_IPersistStream_Load,
      IDirectMusicAudioPathImpl_IPersistStream_Save,
      IDirectMusicAudioPathImpl_IPersistStream_GetSizeMax
};

/* for ClassFactory */
HRESULT WINAPI DMUSIC_CreateDirectMusicAudioPathImpl (LPCGUID lpcGUID, LPVOID* ppobj, LPUNKNOWN pUnkOuter) {
      IDirectMusicAudioPathImpl* obj;
      
      obj = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(IDirectMusicAudioPathImpl));
      if (NULL == obj) {
            *ppobj = NULL;
            return E_OUTOFMEMORY;
      }
      obj->UnknownVtbl = &DirectMusicAudioPath_Unknown_Vtbl;
      obj->AudioPathVtbl = &DirectMusicAudioPath_AudioPath_Vtbl;
      obj->ObjectVtbl = &DirectMusicAudioPath_Object_Vtbl;
      obj->PersistStreamVtbl = &DirectMusicAudioPath_PersistStream_Vtbl;
      obj->pDesc = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(DMUS_OBJECTDESC));
      DM_STRUCT_INIT(obj->pDesc);
      obj->pDesc->dwValidData |= DMUS_OBJ_CLASS;
      memcpy (&obj->pDesc->guidClass, &CLSID_DirectMusicAudioPath, sizeof (CLSID));
      obj->ref = 0; /* will be inited by QueryInterface */
      
      return IDirectMusicAudioPathImpl_IUnknown_QueryInterface ((LPUNKNOWN)&obj->UnknownVtbl, lpcGUID, ppobj);
}

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