Sweden-Number/dlls/dmusic/collection.c

/* IDirectMusicCollection 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 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 "dmusic_private.h"

WINE_DEFAULT_DEBUG_CHANNEL(dmusic);
WINE_DECLARE_DEBUG_CHANNEL(dmfile);

static ULONG WINAPI IDirectMusicCollectionImpl_IUnknown_AddRef (LPUNKNOWN iface);
static ULONG WINAPI IDirectMusicCollectionImpl_IDirectMusicCollection_AddRef (LPDIRECTMUSICCOLLECTION iface);
static ULONG WINAPI IDirectMusicCollectionImpl_IDirectMusicObject_AddRef (LPDIRECTMUSICOBJECT iface);
static ULONG WINAPI IDirectMusicCollectionImpl_IPersistStream_AddRef (LPPERSISTSTREAM iface);

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

	if (IsEqualIID (riid, &IID_IUnknown)) {
		*ppobj = &This->UnknownVtbl;
		IDirectMusicCollectionImpl_IUnknown_AddRef ((LPUNKNOWN)&This->UnknownVtbl);
		return S_OK;	
	} else if (IsEqualIID (riid, &IID_IDirectMusicCollection)) {
		*ppobj = &This->CollectionVtbl;
		IDirectMusicCollectionImpl_IDirectMusicCollection_AddRef ((LPDIRECTMUSICCOLLECTION)&This->CollectionVtbl);
		return S_OK;
	} else if (IsEqualIID (riid, &IID_IDirectMusicObject)) {
		*ppobj = &This->ObjectVtbl;
		IDirectMusicCollectionImpl_IDirectMusicObject_AddRef ((LPDIRECTMUSICOBJECT)&This->ObjectVtbl);		
		return S_OK;
	} else if (IsEqualIID (riid, &IID_IPersistStream)) {
		*ppobj = &This->PersistStreamVtbl;
		IDirectMusicCollectionImpl_IPersistStream_AddRef ((LPPERSISTSTREAM)&This->PersistStreamVtbl);		
		return S_OK;
	}
	
	WARN("(%p, %s, %p): not found\n", This, debugstr_dmguid(riid), ppobj);
	return E_NOINTERFACE;
}

static ULONG WINAPI IDirectMusicCollectionImpl_IUnknown_AddRef (LPUNKNOWN iface) {
	ICOM_THIS_MULTI(IDirectMusicCollectionImpl, UnknownVtbl, iface);
	ULONG refCount = InterlockedIncrement(&This->ref);

	TRACE("(%p)->(ref before=%u)\n", This, refCount - 1);

	DMUSIC_LockModule();

	return refCount;
}

static ULONG WINAPI IDirectMusicCollectionImpl_IUnknown_Release (LPUNKNOWN iface) {
	ICOM_THIS_MULTI(IDirectMusicCollectionImpl, UnknownVtbl, iface);
	ULONG refCount = InterlockedDecrement(&This->ref);

	TRACE("(%p)->(ref before=%u)\n", This, refCount + 1);

	if (!refCount) {
		HeapFree(GetProcessHeap(), 0, This);
	}

	DMUSIC_UnlockModule();

	return refCount;
}

static const IUnknownVtbl DirectMusicCollection_Unknown_Vtbl = {
	IDirectMusicCollectionImpl_IUnknown_QueryInterface,
	IDirectMusicCollectionImpl_IUnknown_AddRef,
	IDirectMusicCollectionImpl_IUnknown_Release
};

/* IDirectMusicCollectionImpl IDirectMusicCollection part: */
static HRESULT WINAPI IDirectMusicCollectionImpl_IDirectMusicCollection_QueryInterface (LPDIRECTMUSICCOLLECTION iface, REFIID riid, LPVOID *ppobj) {
	ICOM_THIS_MULTI(IDirectMusicCollectionImpl, CollectionVtbl, iface);
	return IDirectMusicCollectionImpl_IUnknown_QueryInterface ((LPUNKNOWN)&This->UnknownVtbl, riid, ppobj);
}

static ULONG WINAPI IDirectMusicCollectionImpl_IDirectMusicCollection_AddRef (LPDIRECTMUSICCOLLECTION iface) {
	ICOM_THIS_MULTI(IDirectMusicCollectionImpl, CollectionVtbl, iface);
	return IDirectMusicCollectionImpl_IUnknown_AddRef ((LPUNKNOWN)&This->UnknownVtbl);
}

static ULONG WINAPI IDirectMusicCollectionImpl_IDirectMusicCollection_Release (LPDIRECTMUSICCOLLECTION iface) {
	ICOM_THIS_MULTI(IDirectMusicCollectionImpl, CollectionVtbl, iface);
	return IDirectMusicCollectionImpl_IUnknown_Release ((LPUNKNOWN)&This->UnknownVtbl);
}

/* IDirectMusicCollection Interface follow: */
static HRESULT WINAPI IDirectMusicCollectionImpl_IDirectMusicCollection_GetInstrument (LPDIRECTMUSICCOLLECTION iface, DWORD dwPatch, IDirectMusicInstrument** ppInstrument) {
	ICOM_THIS_MULTI(IDirectMusicCollectionImpl, CollectionVtbl, iface);
	DMUS_PRIVATE_INSTRUMENTENTRY *tmpEntry;
	struct list *listEntry;
	DWORD dwInstPatch;

	TRACE("(%p, %d, %p)\n", This, dwPatch, ppInstrument);
	
	LIST_FOR_EACH (listEntry, &This->Instruments) {
		tmpEntry = LIST_ENTRY(listEntry, DMUS_PRIVATE_INSTRUMENTENTRY, entry);
		IDirectMusicInstrument_GetPatch (tmpEntry->pInstrument, &dwInstPatch);
		if (dwPatch == dwInstPatch) {
			*ppInstrument = tmpEntry->pInstrument;
			IDirectMusicInstrument_AddRef (tmpEntry->pInstrument);
			IDirectMusicInstrumentImpl_Custom_Load (tmpEntry->pInstrument, This->pStm); /* load instrument before returning it */
			TRACE(": returning instrument %p\n", *ppInstrument);
			return S_OK;
		}
			
	}
	TRACE(": instrument not found\n");
	
	return DMUS_E_INVALIDPATCH;
}

static HRESULT WINAPI IDirectMusicCollectionImpl_IDirectMusicCollection_EnumInstrument (LPDIRECTMUSICCOLLECTION iface, DWORD dwIndex, DWORD* pdwPatch, LPWSTR pwszName, DWORD dwNameLen) {
	ICOM_THIS_MULTI(IDirectMusicCollectionImpl, CollectionVtbl, iface);
	unsigned int r = 0;
	DMUS_PRIVATE_INSTRUMENTENTRY *tmpEntry;
	struct list *listEntry;
       DWORD dwLen;
		
	TRACE("(%p, %d, %p, %p, %d)\n", This, dwIndex, pdwPatch, pwszName, dwNameLen);
	LIST_FOR_EACH (listEntry, &This->Instruments) {
		tmpEntry = LIST_ENTRY(listEntry, DMUS_PRIVATE_INSTRUMENTENTRY, entry);
		if (r == dwIndex) {
			IDirectMusicInstrumentImpl *pInstrument = impl_from_IDirectMusicInstrument(tmpEntry->pInstrument);
			IDirectMusicInstrument_GetPatch (tmpEntry->pInstrument, pdwPatch);
                       if (pwszName) {
                               dwLen = min(strlenW(pInstrument->wszName),dwNameLen-1);
                               memcpy (pwszName, pInstrument->wszName, dwLen * sizeof(WCHAR));
                               pwszName[dwLen] = '\0';
                       }
			return S_OK;
		}
		r++;		
	}
	
	return S_FALSE;
}

static const IDirectMusicCollectionVtbl DirectMusicCollection_Collection_Vtbl = {
	IDirectMusicCollectionImpl_IDirectMusicCollection_QueryInterface,
	IDirectMusicCollectionImpl_IDirectMusicCollection_AddRef,
	IDirectMusicCollectionImpl_IDirectMusicCollection_Release,
	IDirectMusicCollectionImpl_IDirectMusicCollection_GetInstrument,
	IDirectMusicCollectionImpl_IDirectMusicCollection_EnumInstrument
};

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

static ULONG WINAPI IDirectMusicCollectionImpl_IDirectMusicObject_AddRef (LPDIRECTMUSICOBJECT iface) {
	ICOM_THIS_MULTI(IDirectMusicCollectionImpl, ObjectVtbl, iface);
	return IDirectMusicCollectionImpl_IUnknown_AddRef ((LPUNKNOWN)&This->UnknownVtbl);
}

static ULONG WINAPI IDirectMusicCollectionImpl_IDirectMusicObject_Release (LPDIRECTMUSICOBJECT iface) {
	ICOM_THIS_MULTI(IDirectMusicCollectionImpl, ObjectVtbl, iface);
	return IDirectMusicCollectionImpl_IUnknown_Release ((LPUNKNOWN)&This->UnknownVtbl);
}

static HRESULT WINAPI IDirectMusicCollectionImpl_IDirectMusicObject_GetDescriptor (LPDIRECTMUSICOBJECT iface, LPDMUS_OBJECTDESC pDesc) {
	ICOM_THIS_MULTI(IDirectMusicCollectionImpl, 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 IDirectMusicCollectionImpl_IDirectMusicObject_SetDescriptor(LPDIRECTMUSICOBJECT iface, LPDMUS_OBJECTDESC pDesc)
{
	ICOM_THIS_MULTI(IDirectMusicCollectionImpl, ObjectVtbl, iface);

	TRACE("(%p, %p)\n", iface, pDesc);

	if (!pDesc)
		return E_POINTER;

	if (TRACE_ON(dmusic))
	{
		TRACE("Setting descriptor:\n");
		dump_DMUS_OBJECTDESC(pDesc);
	}

	/* According to MSDN, we should copy only given values, not whole struct */	
	if (pDesc->dwValidData & DMUS_OBJ_OBJECT)
		This->pDesc->guidObject = pDesc->guidObject;
	if (pDesc->dwValidData & DMUS_OBJ_CLASS)
		This->pDesc->guidClass = 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)
		This->pDesc->vVersion = pDesc->vVersion;
	if (pDesc->dwValidData & DMUS_OBJ_DATE)
		This->pDesc->ftDate = pDesc->ftDate;
	if (pDesc->dwValidData & DMUS_OBJ_MEMORY) {
		This->pDesc->llMemLength = pDesc->llMemLength;
		memcpy (This->pDesc->pbMemData, pDesc->pbMemData, pDesc->llMemLength);
	}
	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 read_from_stream(IStream *stream, void *data, ULONG size)
{
    ULONG read;
    HRESULT hr;

    hr = IStream_Read(stream, data, size, &read);
    if (FAILED(hr)) {
        TRACE("IStream_Read failed: %08x\n", hr);
        return hr;
    }
    if (read < size) {
        TRACE("Didn't read full chunk: %u < %u\n", read, size);
        return E_FAIL;
    }

    return S_OK;
}

static HRESULT WINAPI IDirectMusicCollectionImpl_IDirectMusicObject_ParseDescriptor(LPDIRECTMUSICOBJECT iface, LPSTREAM stream, LPDMUS_OBJECTDESC desc)
{
    ICOM_THIS_MULTI(IDirectMusicCollectionImpl, ObjectVtbl, iface);
    DMUS_PRIVATE_CHUNK chunk;
    DWORD StreamSize, StreamCount, ListSize[1], ListCount[1];
    LARGE_INTEGER liMove; /* used when skipping chunks */
    HRESULT hr;

    TRACE("(%p)->(%p, %p)\n", This, stream, desc);

    /* FIXME: should this be determined from stream? */
    desc->dwValidData |= DMUS_OBJ_CLASS;
    desc->guidClass = CLSID_DirectMusicCollection;

    hr = read_from_stream(stream, &chunk, sizeof(FOURCC) + sizeof(DWORD));
    if (FAILED(hr))
        return hr;
    TRACE_(dmfile)(": %s chunk (size = 0x%04x)", debugstr_fourcc(chunk.fccID), chunk.dwSize);

    if (chunk.fccID != FOURCC_RIFF) {
        TRACE_(dmfile)(": unexpected chunk; loading failed)\n");
        liMove.QuadPart = chunk.dwSize;
        IStream_Seek(stream, liMove, STREAM_SEEK_CUR, NULL); /* skip the rest of the chunk */
        return DMUS_E_INVALIDFILE;
    }

    hr = read_from_stream(stream, &chunk.fccID, sizeof(FOURCC));
    if (FAILED(hr))
        return hr;
    TRACE_(dmfile)(": RIFF chunk of type %s", debugstr_fourcc(chunk.fccID));
    StreamSize = chunk.dwSize - sizeof(FOURCC);

    if (chunk.fccID != mmioFOURCC('D','L','S',' ')) {
        TRACE_(dmfile)(": unexpected chunk; loading failed)\n");
        liMove.QuadPart = StreamSize;
        IStream_Seek(stream, liMove, STREAM_SEEK_CUR, NULL); /* skip the rest of the chunk */
        return E_FAIL;
    }

    StreamCount = 0;
    TRACE_(dmfile)(": collection form\n");

    do {
        hr = read_from_stream(stream, &chunk, sizeof(FOURCC) + sizeof(DWORD));
        if (FAILED(hr))
            return hr;
        StreamCount += sizeof(FOURCC) + sizeof(DWORD) + chunk.dwSize;
        TRACE_(dmfile)(": %s chunk (size = 0x%04x)", debugstr_fourcc(chunk.fccID), chunk.dwSize);
        switch (chunk.fccID) {
            case FOURCC_DLID:
                TRACE_(dmfile)(": GUID chunk\n");
                desc->dwValidData |= DMUS_OBJ_OBJECT;
                hr = read_from_stream(stream, &desc->guidObject, chunk.dwSize);
                if (FAILED(hr))
                    return hr;
                break;

            case DMUS_FOURCC_VERSION_CHUNK:
                TRACE_(dmfile)(": version chunk\n");
                desc->dwValidData |= DMUS_OBJ_VERSION;
                hr = read_from_stream(stream, &desc->vVersion, chunk.dwSize);
                if (FAILED(hr))
                    return hr;
                break;

            case DMUS_FOURCC_CATEGORY_CHUNK:
                TRACE_(dmfile)(": category chunk\n");
                desc->dwValidData |= DMUS_OBJ_CATEGORY;
                hr = read_from_stream(stream, desc->wszCategory, chunk.dwSize);
                if (FAILED(hr))
                    return hr;
                break;

            case FOURCC_LIST:
                hr = read_from_stream(stream, &chunk.fccID, sizeof(FOURCC));
                if (FAILED(hr))
                    return hr;
                TRACE_(dmfile)(": LIST chunk of type %s", debugstr_fourcc(chunk.fccID));
                ListSize[0] = chunk.dwSize - sizeof(FOURCC);
                ListCount[0] = 0;
                switch (chunk.fccID) {
                    /* pure INFO list, such can be found in dls collections */
                    case mmioFOURCC('I','N','F','O'):
                        TRACE_(dmfile)(": INFO list\n");
                        do {
                            hr = read_from_stream(stream, &chunk, sizeof(FOURCC) + sizeof(DWORD));
                            if (FAILED(hr))
                                return hr;
                            ListCount[0] += sizeof(FOURCC) + sizeof(DWORD) + chunk.dwSize;
                            TRACE_(dmfile)(": %s chunk (size = 0x%04x)", debugstr_fourcc(chunk.fccID), chunk.dwSize);
                            switch (chunk.fccID) {
                                case mmioFOURCC('I','N','A','M'): {
                                    CHAR szName[DMUS_MAX_NAME];
                                    TRACE_(dmfile)(": name chunk\n");
                                    desc->dwValidData |= DMUS_OBJ_NAME;
                                    hr = read_from_stream(stream, szName, chunk.dwSize);
                                    if (FAILED(hr))
                                        return hr;
                                    MultiByteToWideChar (CP_ACP, 0, szName, -1, desc->wszName, DMUS_MAX_NAME);
                                    if (even_or_odd(chunk.dwSize)) {
                                        ListCount[0]++;
                                        liMove.QuadPart = 1;
                                        IStream_Seek(stream, liMove, STREAM_SEEK_CUR, NULL);
                                    }
                                    break;
                                }

                                case mmioFOURCC('I','A','R','T'):
                                    TRACE_(dmfile)(": artist chunk (ignored)\n");
                                    if (even_or_odd(chunk.dwSize)) {
                                        ListCount[0]++;
                                        chunk.dwSize++;
                                    }
                                    liMove.QuadPart = chunk.dwSize;
                                    IStream_Seek(stream, liMove, STREAM_SEEK_CUR, NULL);
                                    break;

                                case mmioFOURCC('I','C','O','P'):
                                    TRACE_(dmfile)(": copyright chunk (ignored)\n");
                                    if (even_or_odd(chunk.dwSize)) {
                                        ListCount[0]++;
                                        chunk.dwSize++;
                                    }
                                    liMove.QuadPart = chunk.dwSize;
                                    IStream_Seek(stream, liMove, STREAM_SEEK_CUR, NULL);
                                    break;

                                case mmioFOURCC('I','S','B','J'):
                                    TRACE_(dmfile)(": subject chunk (ignored)\n");
                                    if (even_or_odd(chunk.dwSize)) {
                                        ListCount[0]++;
                                        chunk.dwSize++;
                                    }
                                    liMove.QuadPart = chunk.dwSize;
                                    IStream_Seek(stream, liMove, STREAM_SEEK_CUR, NULL);
                                    break;

                                case mmioFOURCC('I','C','M','T'):
                                    TRACE_(dmfile)(": comment chunk (ignored)\n");
                                    if (even_or_odd(chunk.dwSize)) {
                                        ListCount[0]++;
                                        chunk.dwSize++;
                                    liMove.QuadPart = chunk.dwSize;
                                    IStream_Seek(stream, liMove, STREAM_SEEK_CUR, NULL);
                                    break;
                                }

                                default:
                                    TRACE_(dmfile)(": unknown chunk (irrelevant & skipping)\n");
                                    if (even_or_odd(chunk.dwSize)) {
                                        ListCount[0] ++;
                                        chunk.dwSize++;
                                    }
                                    liMove.QuadPart = chunk.dwSize;
                                    IStream_Seek(stream, 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(stream, liMove, STREAM_SEEK_CUR, NULL);
                         break;
                 }
                 break;

            default:
                TRACE_(dmfile)(": unknown chunk (irrelevant & skipping)\n");
                liMove.QuadPart = chunk.dwSize;
                IStream_Seek(stream, liMove, STREAM_SEEK_CUR, NULL);
                break;
        }
        TRACE_(dmfile)(": StreamCount[0] = %d < StreamSize[0] = %d\n", StreamCount, StreamSize);
    } while (StreamCount < StreamSize);

    TRACE_(dmfile)(": reading finished\n");

    if (TRACE_ON(dmusic)) {
        TRACE("Returning descriptor:\n");
        dump_DMUS_OBJECTDESC(desc);
    }

    return S_OK;
}

static const IDirectMusicObjectVtbl DirectMusicCollection_Object_Vtbl = {
	IDirectMusicCollectionImpl_IDirectMusicObject_QueryInterface,
	IDirectMusicCollectionImpl_IDirectMusicObject_AddRef,
	IDirectMusicCollectionImpl_IDirectMusicObject_Release,
	IDirectMusicCollectionImpl_IDirectMusicObject_GetDescriptor,
	IDirectMusicCollectionImpl_IDirectMusicObject_SetDescriptor,
	IDirectMusicCollectionImpl_IDirectMusicObject_ParseDescriptor
};

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

static ULONG WINAPI IDirectMusicCollectionImpl_IPersistStream_AddRef (LPPERSISTSTREAM iface) {
	ICOM_THIS_MULTI(IDirectMusicCollectionImpl, PersistStreamVtbl, iface);
	return IDirectMusicCollectionImpl_IUnknown_AddRef ((LPUNKNOWN)&This->UnknownVtbl);
}

static ULONG WINAPI IDirectMusicCollectionImpl_IPersistStream_Release (LPPERSISTSTREAM iface) {
	ICOM_THIS_MULTI(IDirectMusicCollectionImpl, PersistStreamVtbl, iface);
	return IDirectMusicCollectionImpl_IUnknown_Release ((LPUNKNOWN)&This->UnknownVtbl);
}

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

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

static HRESULT WINAPI IDirectMusicCollectionImpl_IPersistStream_Load (LPPERSISTSTREAM iface, IStream* pStm) {
	ICOM_THIS_MULTI(IDirectMusicCollectionImpl, PersistStreamVtbl, iface);

	DMUS_PRIVATE_CHUNK Chunk;
	DWORD StreamSize, StreamCount, ListSize[3], ListCount[3];
	LARGE_INTEGER liMove; /* used when skipping chunks */
	ULARGE_INTEGER dlibCollectionPosition, dlibInstrumentPosition, dlibWavePoolPosition;
	
	IStream_AddRef (pStm); /* add count for later references */
	liMove.QuadPart = 0;
	IStream_Seek (pStm, liMove, STREAM_SEEK_CUR, &dlibCollectionPosition); /* store offset, in case it'll be needed later */
	This->liCollectionPosition.QuadPart = dlibCollectionPosition.QuadPart;
	This->pStm = pStm;
	
	IStream_Read (pStm, &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 (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 FOURCC_DLS: {
					TRACE_(dmfile)(": collection form\n");
					do {
						IStream_Read (pStm, &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 FOURCC_COLH: {
								TRACE_(dmfile)(": collection header chunk\n");
								This->pHeader = HeapAlloc (GetProcessHeap (), HEAP_ZERO_MEMORY, Chunk.dwSize);
								IStream_Read (pStm, This->pHeader, Chunk.dwSize, NULL);
								break;								
							}
							case FOURCC_DLID: {
								TRACE_(dmfile)(": DLID (GUID) chunk\n");
								This->pDesc->dwValidData |= DMUS_OBJ_OBJECT;
								IStream_Read (pStm, &This->pDesc->guidObject, Chunk.dwSize, NULL);
								break;
							}
							case FOURCC_VERS: {
								TRACE_(dmfile)(": version chunk\n");
								This->pDesc->dwValidData |= DMUS_OBJ_VERSION;
								IStream_Read (pStm, &This->pDesc->vVersion, Chunk.dwSize, NULL);
								break;
							}
							case FOURCC_PTBL: {
								TRACE_(dmfile)(": pool table chunk\n");
								This->pPoolTable = HeapAlloc (GetProcessHeap (), HEAP_ZERO_MEMORY, sizeof(POOLTABLE));
								IStream_Read (pStm, This->pPoolTable, sizeof(POOLTABLE), NULL);
								Chunk.dwSize -= sizeof(POOLTABLE);
								This->pPoolCues = HeapAlloc (GetProcessHeap (), HEAP_ZERO_MEMORY, This->pPoolTable->cCues*sizeof(POOLCUE));
								IStream_Read (pStm, This->pPoolCues, Chunk.dwSize, NULL);
								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 mmioFOURCC('I','N','F','O'): {
										TRACE_(dmfile)(": INFO 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%04x)", debugstr_fourcc (Chunk.fccID), Chunk.dwSize);
											switch (Chunk.fccID) {
												case mmioFOURCC('I','N','A','M'): {
													CHAR szName[DMUS_MAX_NAME];
													TRACE_(dmfile)(": name chunk\n");
													This->pDesc->dwValidData |= DMUS_OBJ_NAME;
													IStream_Read (pStm, szName, Chunk.dwSize, NULL);
													MultiByteToWideChar (CP_ACP, 0, szName, -1, This->pDesc->wszName, DMUS_MAX_NAME);
													if (even_or_odd(Chunk.dwSize)) {
														ListCount[0] ++;
														liMove.QuadPart = 1;
														IStream_Seek (pStm, liMove, STREAM_SEEK_CUR, NULL);
													}
													break;
												}
												case mmioFOURCC('I','A','R','T'): {
													TRACE_(dmfile)(": artist chunk (ignored)\n");
													if (even_or_odd(Chunk.dwSize)) {
														ListCount[0] ++;
														Chunk.dwSize++;
													}
													liMove.QuadPart = Chunk.dwSize;
													IStream_Seek (pStm, liMove, STREAM_SEEK_CUR, NULL);
													break;
												}
												case mmioFOURCC('I','C','O','P'): {
													TRACE_(dmfile)(": copyright chunk\n");
													This->szCopyright = HeapAlloc (GetProcessHeap (), HEAP_ZERO_MEMORY, Chunk.dwSize);
													IStream_Read (pStm, This->szCopyright, Chunk.dwSize, NULL);
													if (even_or_odd(Chunk.dwSize)) {
														ListCount[0] ++;
														liMove.QuadPart = 1;
														IStream_Seek (pStm, liMove, STREAM_SEEK_CUR, NULL);
													}
													break;
												}
												case mmioFOURCC('I','S','B','J'): {
													TRACE_(dmfile)(": subject chunk (ignored)\n");
													if (even_or_odd(Chunk.dwSize)) {
														ListCount[0] ++;
														Chunk.dwSize++;
													}
													liMove.QuadPart = Chunk.dwSize;
													IStream_Seek (pStm, liMove, STREAM_SEEK_CUR, NULL);
													break;
												}
												case mmioFOURCC('I','C','M','T'): {
													TRACE_(dmfile)(": comment chunk (ignored)\n");
													if (even_or_odd(Chunk.dwSize)) {
														ListCount[0] ++;
														Chunk.dwSize++;
													}
													liMove.QuadPart = Chunk.dwSize;
													IStream_Seek (pStm, liMove, STREAM_SEEK_CUR, NULL);
													break;
												}
												default: {
													TRACE_(dmfile)(": unknown chunk (irrelevant & skipping)\n");
													if (even_or_odd(Chunk.dwSize)) {
														ListCount[0] ++;
														Chunk.dwSize++;
													}
													liMove.QuadPart = Chunk.dwSize;
													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;
									}
									case FOURCC_WVPL: {
										TRACE_(dmfile)(": wave pool list (mark & skip)\n");
										liMove.QuadPart = 0;
										IStream_Seek (pStm, liMove, STREAM_SEEK_CUR, &dlibWavePoolPosition); /* store position */
										This->liWavePoolTablePosition.QuadPart = dlibWavePoolPosition.QuadPart;
										liMove.QuadPart = Chunk.dwSize - sizeof(FOURCC);
										IStream_Seek (pStm, liMove, STREAM_SEEK_CUR, NULL);
										break;	
									}
									case FOURCC_LINS: {
										TRACE_(dmfile)(": instruments 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%04x)", 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 FOURCC_INS: {
															LPDMUS_PRIVATE_INSTRUMENTENTRY pNewInstrument = HeapAlloc (GetProcessHeap (), HEAP_ZERO_MEMORY, sizeof(DMUS_PRIVATE_INSTRUMENTENTRY));
															TRACE_(dmfile)(": instrument list\n");
															DMUSIC_CreateDirectMusicInstrumentImpl (&IID_IDirectMusicInstrument, (LPVOID*)&pNewInstrument->pInstrument, NULL); /* only way to create this one... even M$ does it discretely */
                                                                                                                        {
                                                                                                                            IDirectMusicInstrumentImpl *pInstrument = impl_from_IDirectMusicInstrument(pNewInstrument->pInstrument);
                                                                                                                            liMove.QuadPart = 0;
                                                                                                                            IStream_Seek (pStm, liMove, STREAM_SEEK_CUR, &dlibInstrumentPosition);
                                                                                                                            pInstrument->liInstrumentPosition.QuadPart = dlibInstrumentPosition.QuadPart - (2*sizeof(FOURCC) + sizeof(DWORD)); /* store offset, it'll be needed later */

                                                                                                                            do {
																IStream_Read (pStm, &Chunk, sizeof(FOURCC)+sizeof(DWORD), NULL);
																ListCount[1] += sizeof(FOURCC) + sizeof(DWORD) + Chunk.dwSize;
																TRACE_(dmfile)(": %s chunk (size = 0x%04x)", debugstr_fourcc (Chunk.fccID), Chunk.dwSize);
																switch (Chunk.fccID) {
																	case FOURCC_INSH: {
																		TRACE_(dmfile)(": instrument header chunk\n");
																		pInstrument->pHeader = HeapAlloc (GetProcessHeap (), HEAP_ZERO_MEMORY, Chunk.dwSize);
																		IStream_Read (pStm, pInstrument->pHeader, Chunk.dwSize, NULL);
																		break;	
																	}
																	case FOURCC_DLID: {
																		TRACE_(dmfile)(": DLID (GUID) chunk\n");
																		pInstrument->pInstrumentID = HeapAlloc (GetProcessHeap (), HEAP_ZERO_MEMORY, Chunk.dwSize);
																		IStream_Read (pStm, pInstrument->pInstrumentID, Chunk.dwSize, NULL);
																		break;
																	}
																	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) {
																			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[1] = %d < ListSize[1] = %d\n", ListCount[1], ListSize[1]);
                                                                                                                            } while (ListCount[1] < ListSize[1]);
                                                                                                                            /* DEBUG: dumps whole instrument object tree: */
                                                                                                                            if (TRACE_ON(dmusic)) {
																TRACE("*** IDirectMusicInstrument (%p) ***\n", pInstrument);
																if (pInstrument->pInstrumentID)
																	TRACE(" - GUID = %s\n", debugstr_dmguid(pInstrument->pInstrumentID));
																
																TRACE(" - Instrument header:\n");
																TRACE("    - cRegions: %d\n", pInstrument->pHeader->cRegions);
																TRACE("    - Locale:\n");
																TRACE("       - ulBank: %d\n", pInstrument->pHeader->Locale.ulBank);
																TRACE("       - ulInstrument: %d\n", pInstrument->pHeader->Locale.ulInstrument);
																TRACE("       => dwPatch: %d\n", MIDILOCALE2Patch(&pInstrument->pHeader->Locale));
                                                                                                                            }
                                                                                                                            list_add_tail (&This->Instruments, &pNewInstrument->entry);
                                                                                                                        }
															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] = %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 (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 = %d < StreamSize = %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 = Chunk.dwSize;
			IStream_Seek (pStm, liMove, STREAM_SEEK_CUR, NULL); /* skip the rest of the chunk */
			return E_FAIL;
		}
	}

	/* DEBUG: dumps whole collection object tree: */
	if (TRACE_ON(dmusic)) {
		int r = 0;
		DMUS_PRIVATE_INSTRUMENTENTRY *tmpEntry;
		struct list *listEntry;

		TRACE("*** IDirectMusicCollection (%p) ***\n", This->CollectionVtbl);
		if (This->pDesc->dwValidData & DMUS_OBJ_OBJECT)
			TRACE(" - GUID = %s\n", debugstr_dmguid(&This->pDesc->guidObject));
		if (This->pDesc->dwValidData & DMUS_OBJ_VERSION)
			TRACE(" - Version = %i,%i,%i,%i\n", (This->pDesc->vVersion.dwVersionMS >> 8) & 0x0000FFFF, This->pDesc->vVersion.dwVersionMS & 0x0000FFFF,
				(This->pDesc->vVersion.dwVersionLS >> 8) & 0x0000FFFF, This->pDesc->vVersion.dwVersionLS & 0x0000FFFF);
		if (This->pDesc->dwValidData & DMUS_OBJ_NAME)
			TRACE(" - Name = %s\n", debugstr_w(This->pDesc->wszName));
		
		TRACE(" - Collection header:\n");
		TRACE("    - cInstruments: %d\n", This->pHeader->cInstruments);
		TRACE(" - Instruments:\n");
		
		LIST_FOR_EACH (listEntry, &This->Instruments) {
			tmpEntry = LIST_ENTRY( listEntry, DMUS_PRIVATE_INSTRUMENTENTRY, entry );
			TRACE("    - Instrument[%i]: %p\n", r, tmpEntry->pInstrument);
			r++;
		}
	}
	
	return S_OK;
}

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

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

static const IPersistStreamVtbl DirectMusicCollection_PersistStream_Vtbl = {
	IDirectMusicCollectionImpl_IPersistStream_QueryInterface,
	IDirectMusicCollectionImpl_IPersistStream_AddRef,
	IDirectMusicCollectionImpl_IPersistStream_Release,
	IDirectMusicCollectionImpl_IPersistStream_GetClassID,
	IDirectMusicCollectionImpl_IPersistStream_IsDirty,
	IDirectMusicCollectionImpl_IPersistStream_Load,
	IDirectMusicCollectionImpl_IPersistStream_Save,
	IDirectMusicCollectionImpl_IPersistStream_GetSizeMax
};


/* for ClassFactory */
HRESULT WINAPI DMUSIC_CreateDirectMusicCollectionImpl (LPCGUID lpcGUID, LPVOID* ppobj, LPUNKNOWN pUnkOuter) {
	IDirectMusicCollectionImpl* obj;
	
	obj = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(IDirectMusicCollectionImpl));
	if (NULL == obj) {
		*ppobj = NULL;
		return E_OUTOFMEMORY;
	}
	obj->UnknownVtbl = &DirectMusicCollection_Unknown_Vtbl;
	obj->CollectionVtbl = &DirectMusicCollection_Collection_Vtbl;
	obj->ObjectVtbl = &DirectMusicCollection_Object_Vtbl;
	obj->PersistStreamVtbl = &DirectMusicCollection_PersistStream_Vtbl;
	obj->pDesc = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(DMUS_OBJECTDESC));
	DM_STRUCT_INIT(obj->pDesc);
	obj->pDesc->dwValidData |= DMUS_OBJ_CLASS;
	obj->pDesc->guidClass = CLSID_DirectMusicCollection;
	obj->ref = 0; /* will be inited by QueryInterface */
	list_init (&obj->Instruments);

	return IDirectMusicCollectionImpl_IUnknown_QueryInterface ((LPUNKNOWN)&obj->UnknownVtbl, lpcGUID, ppobj);
}