container.c

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/* 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);
 
#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)
 
typedef struct riff_chunk {
    FOURCC fccID;
    DWORD dwSize;
} WINE_CHUNK;
 
/* contained object entry */
typedef struct container_entry {
    struct list entry;
    DMUS_OBJECTDESC Desc;
    BOOL bIsRIFF;
    DWORD dwFlags; /* DMUS_CONTAINED_OBJF_KEEP: keep object in loader's cache, even when container is released */
    WCHAR *wszAlias;
    IDirectMusicObject *pObject; /* needed when releasing from loader's cache on container release */
} WINE_CONTAINER_ENTRY, *LPWINE_CONTAINER_ENTRY;
 
/*****************************************************************************
 * IDirectMusicContainerImpl implementation
 */
typedef struct IDirectMusicContainerImpl {
    IDirectMusicContainer IDirectMusicContainer_iface;
    struct dmobject dmobj;
    LONG ref;
    IStream *pStream;
    DMUS_IO_CONTAINER_HEADER Header; /* header */
    struct list *pContainedObjects;  /* data */
} IDirectMusicContainerImpl;
 
static inline IDirectMusicContainerImpl *impl_from_IDirectMusicContainer(IDirectMusicContainer *iface)
{
    return CONTAINING_RECORD(iface, IDirectMusicContainerImpl, IDirectMusicContainer_iface);
}
 
static HRESULT destroy_dmcontainer(IDirectMusicContainerImpl *This)
{
    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 */
 
    return S_OK;
}
 
static HRESULT WINAPI IDirectMusicContainerImpl_QueryInterface(IDirectMusicContainer *iface, REFIID riid, void **ret_iface)
{
    IDirectMusicContainerImpl *This = impl_from_IDirectMusicContainer(iface);
 
    TRACE("(%p, %s, %p)\n", This, debugstr_dmguid(riid), ret_iface);
 
    if (IsEqualIID (riid, &IID_IUnknown) || IsEqualIID (riid, &IID_IDirectMusicContainer))
        *ret_iface = &This->IDirectMusicContainer_iface;
    else if (IsEqualIID (riid, &IID_IDirectMusicObject))
        *ret_iface = &This->dmobj.IDirectMusicObject_iface;
    else if (IsEqualIID (riid, &IID_IPersistStream))
        *ret_iface = &This->dmobj.IPersistStream_iface;
    else {
        WARN("Unknown interface %s\n", debugstr_dmguid(riid));
        *ret_iface = NULL;
        return E_NOINTERFACE;
    }
 
    IUnknown_AddRef((IUnknown*)*ret_iface);
    return S_OK;
}
 
static ULONG WINAPI IDirectMusicContainerImpl_AddRef(IDirectMusicContainer *iface)
{
    IDirectMusicContainerImpl *This = impl_from_IDirectMusicContainer(iface);
    LONG ref = InterlockedIncrement(&This->ref);
 
    TRACE("(%p) ref=%ld\n", This, ref);
 
    return ref;
}
 
static ULONG WINAPI IDirectMusicContainerImpl_Release(IDirectMusicContainer *iface)
{
    IDirectMusicContainerImpl *This = impl_from_IDirectMusicContainer(iface);
    LONG ref = InterlockedDecrement(&This->ref);
 
    TRACE("(%p) ref=%ld\n", This, ref);
 
    if (!ref) {
        if (This->pStream)
            destroy_dmcontainer(This);
        free(This);
    }
 
    return ref;
}
 
static HRESULT WINAPI IDirectMusicContainerImpl_EnumObject(IDirectMusicContainer *iface,
        REFGUID rguidClass, DWORD dwIndex, DMUS_OBJECTDESC *pDesc, WCHAR *pwszAlias)
{
    IDirectMusicContainerImpl *This = impl_from_IDirectMusicContainer(iface);
    struct list *pEntry;
    LPWINE_CONTAINER_ENTRY pContainedObject;
    DWORD dwCount = 0;
 
    TRACE("(%p, %s, %ld, %p, %p)\n", This, debugstr_dmguid(rguidClass), dwIndex, pDesc, pwszAlias);
 
    if (!pDesc)
        return E_POINTER;
    if (pDesc->dwSize != sizeof(DMUS_OBJECTDESC)) {
        ERR(": invalid pDesc->dwSize %ld\n", pDesc->dwSize);
        return E_INVALIDARG;
    }
 
    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 (lstrlenW (pContainedObject->wszAlias) > DMUS_MAX_FILENAME)
                        result = DMUS_S_STRING_TRUNCATED;
                }
                *pDesc = pContainedObject->Desc;
                return result;
            }
            dwCount++;
        }
    }       
    
    TRACE(": not found\n");
    return S_FALSE;
}
 
static const IDirectMusicContainerVtbl dmcontainer_vtbl = {
    IDirectMusicContainerImpl_QueryInterface,
    IDirectMusicContainerImpl_AddRef,
    IDirectMusicContainerImpl_Release,
    IDirectMusicContainerImpl_EnumObject
};
 
/* IDirectMusicObject part: */
static HRESULT WINAPI cont_IDirectMusicObject_ParseDescriptor(IDirectMusicObject *iface,
        IStream *stream, DMUS_OBJECTDESC *desc)
{
    struct chunk_entry riff = {0};
    HRESULT hr;
 
    TRACE("(%p, %p, %p)\n", iface, stream, desc);
 
    if (!stream)
        return E_POINTER;
    if (!desc || desc->dwSize != sizeof(*desc))
        return E_INVALIDARG;
 
    if ((hr = stream_get_chunk(stream, &riff)) != S_OK)
        return hr;
    if (riff.id != FOURCC_RIFF || riff.type != DMUS_FOURCC_CONTAINER_FORM) {
        TRACE("loading failed: unexpected %s\n", debugstr_chunk(&riff));
        stream_skip_chunk(stream, &riff);
        return DMUS_E_DESCEND_CHUNK_FAIL;
    }
 
    hr = dmobj_parsedescriptor(stream, &riff, desc,
            DMUS_OBJ_OBJECT|DMUS_OBJ_CLASS|DMUS_OBJ_NAME|DMUS_OBJ_CATEGORY|DMUS_OBJ_VERSION);
    if (FAILED(hr))
        return hr;
 
    desc->guidClass = CLSID_DirectMusicContainer;
    desc->dwValidData |= DMUS_OBJ_CLASS;
 
    TRACE("returning descriptor:\n");
    dump_DMUS_OBJECTDESC (desc);
    return S_OK;
}
 
static const IDirectMusicObjectVtbl dmobject_vtbl = {
    dmobj_IDirectMusicObject_QueryInterface,
    dmobj_IDirectMusicObject_AddRef,
    dmobj_IDirectMusicObject_Release,
    dmobj_IDirectMusicObject_GetDescriptor,
    dmobj_IDirectMusicObject_SetDescriptor,
    cont_IDirectMusicObject_ParseDescriptor
};
 
/* IPersistStream part: */
static inline IDirectMusicContainerImpl *impl_from_IPersistStream(IPersistStream *iface)
{
    return CONTAINING_RECORD(iface, IDirectMusicContainerImpl, dmobj.IPersistStream_iface);
}
 
static HRESULT WINAPI IPersistStreamImpl_Load(IPersistStream *iface, IStream *pStm)
{
        IDirectMusicContainerImpl *This = impl_from_IPersistStream(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 = %#lx)", 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->dmobj.desc.guidClass = CLSID_DirectMusicContainer;
                    This->dmobj.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 = %#lx)", debugstr_fourcc (Chunk.fccID), Chunk.dwSize);
                        switch (Chunk.fccID) {
                            case DMUS_FOURCC_CONTAINER_CHUNK: {
                                IStream_Read (pStm, &This->Header, Chunk.dwSize, NULL);
                                TRACE_(dmfile)(": 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->dmobj.desc.guidObject, Chunk.dwSize, NULL);
                                This->dmobj.desc.dwValidData |= DMUS_OBJ_OBJECT;
                                break;
                            }
                            case DMUS_FOURCC_VERSION_CHUNK: {
                                TRACE_(dmfile)(": version chunk\n");
                                IStream_Read (pStm, &This->dmobj.desc.vVersion, Chunk.dwSize, NULL);
                                This->dmobj.desc.dwValidData |= DMUS_OBJ_VERSION;
                                break;
                            }
                            case DMUS_FOURCC_DATE_CHUNK: {
                                TRACE_(dmfile)(": date chunk\n");
                                IStream_Read (pStm, &This->dmobj.desc.ftDate, Chunk.dwSize, NULL);
                                This->dmobj.desc.dwValidData |= DMUS_OBJ_DATE;
                                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->dmobj.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->dmobj.desc.wszCategory, Chunk.dwSize, NULL);
                                }
                                This->dmobj.desc.dwValidData |= DMUS_OBJ_CATEGORY;
                                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 = %#lx)", 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->dmobj.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->dmobj.desc.wszName, Chunk.dwSize, NULL);
                                                    }
                                                    This->dmobj.desc.dwValidData |= DMUS_OBJ_NAME;
                                                    break;
                                                }
                                                default: {
                                                    TRACE_(dmfile)(": unknown chunk (irrelevant & skipping)\n");
                                                    liMove.QuadPart = Chunk.dwSize;
                                                    IStream_Seek (pStm, liMove, STREAM_SEEK_CUR, NULL);
                                                    break;                      
                                                }
                                            }
                                            TRACE_(dmfile)(": ListCount[0] = %#lx < ListSize[0] = %#lx\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 = %#lx)", 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 = calloc(1, sizeof(*pNewEntry));
                                                            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 = %#lx)", debugstr_fourcc (Chunk.fccID), Chunk.dwSize);
                                                                switch (Chunk.fccID) {
                                                                    case DMUS_FOURCC_CONTAINED_ALIAS_CHUNK: {
                                                                        TRACE_(dmfile)(": alias chunk\n");
                                                                        pNewEntry->wszAlias = calloc(1, Chunk.dwSize);
                                                                        IStream_Read (pStm, pNewEntry->wszAlias, Chunk.dwSize, NULL);
                                                                        TRACE_(dmfile)(": alias: %s\n", debugstr_w(pNewEntry->wszAlias));
                                                                        break;
                                                                    }
                                                                    case DMUS_FOURCC_CONTAINED_OBJECT_CHUNK: {
                                                                        DMUS_IO_CONTAINED_OBJECT_HEADER tmpObjectHeader;
                                                                        IStream_Read (pStm, &tmpObjectHeader, Chunk.dwSize, NULL);
                                                                        TRACE_(dmfile)(": 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 = %#lx)", 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] = %#lx < ListSize[2] = %#lx\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 (irrelevant & skipping)\n");
                                                                        liMove.QuadPart = Chunk.dwSize;
                                                                        IStream_Seek (pStm, liMove, STREAM_SEEK_CUR, NULL);
                                                                        break;                      
                                                                    }
                                                                }
                                                                TRACE_(dmfile)(": ListCount[1] = %#lx < ListSize[1] = %#lx\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 (irrelevant & skipping)\n");
                                                    liMove.QuadPart = Chunk.dwSize;
                                                    IStream_Seek (pStm, liMove, STREAM_SEEK_CUR, NULL);
                                                    break;                      
                                                }
                                            }
                                            TRACE_(dmfile)(": ListCount[0] = %#lx < ListSize[0] = %#lx\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 (irrelevant & skipping)\n");
                                liMove.QuadPart = Chunk.dwSize;
                                IStream_Seek (pStm, liMove, STREAM_SEEK_CUR, NULL);
                                break;                      
                            }
                        }
                        TRACE_(dmfile)(": StreamCount[0] = %#lx < StreamSize[0] = %#lx\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->dmobj.desc.dwValidData |= DMUS_OBJ_LOADED;
                        dump_DMUS_OBJECTDESC(&This->dmobj.desc);
            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 */
 
    return result;
}
 
static const IPersistStreamVtbl persiststream_vtbl = {
    dmobj_IPersistStream_QueryInterface,
    dmobj_IPersistStream_AddRef,
    dmobj_IPersistStream_Release,
    dmobj_IPersistStream_GetClassID,
    unimpl_IPersistStream_IsDirty,
    IPersistStreamImpl_Load,
    unimpl_IPersistStream_Save,
    unimpl_IPersistStream_GetSizeMax
};
 
/* for ClassFactory */
HRESULT create_dmcontainer(REFIID lpcGUID, void **ppobj)
{
    IDirectMusicContainerImpl* obj;
    HRESULT hr;
 
    *ppobj = NULL;
    if (!(obj = calloc(1, sizeof(*obj)))) return E_OUTOFMEMORY;
    obj->IDirectMusicContainer_iface.lpVtbl = &dmcontainer_vtbl;
    obj->ref = 1;
    dmobject_init(&obj->dmobj, &CLSID_DirectMusicContainer,
                    (IUnknown*)&obj->IDirectMusicContainer_iface);
    obj->dmobj.IDirectMusicObject_iface.lpVtbl = &dmobject_vtbl;
    obj->dmobj.IPersistStream_iface.lpVtbl = &persiststream_vtbl;
    obj->pContainedObjects = HeapAlloc (GetProcessHeap (), HEAP_ZERO_MEMORY, sizeof(struct list));
    list_init (obj->pContainedObjects);
 
    hr = IDirectMusicContainer_QueryInterface(&obj->IDirectMusicContainer_iface, lpcGUID, ppobj);
    IDirectMusicContainer_Release(&obj->IDirectMusicContainer_iface);
 
    return hr;
}