/*
 * 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 inline IDirectMusicCollectionImpl *impl_from_IDirectMusicCollection(IDirectMusicCollection *iface)
{
    return CONTAINING_RECORD(iface, IDirectMusicCollectionImpl, IDirectMusicCollection_iface);
}

static inline IDirectMusicCollectionImpl *impl_from_IDirectMusicObject(IDirectMusicObject *iface)
{
    return CONTAINING_RECORD(iface, IDirectMusicCollectionImpl, IDirectMusicObject_iface);
}

static inline IDirectMusicCollectionImpl *impl_from_IPersistStream(IPersistStream *iface)
{
    return CONTAINING_RECORD(iface, IDirectMusicCollectionImpl, IPersistStream_iface);
}

/*****************************************************************************
 * IDirectMusicCollectionImpl implementation
 */
/* IDirectMusicCollectionImpl IUnknown part: */
static HRESULT WINAPI IDirectMusicCollectionImpl_IDirectMusicCollection_QueryInterface(LPDIRECTMUSICCOLLECTION iface, REFIID riid, LPVOID *ret_iface)
{
    IDirectMusicCollectionImpl *This = impl_from_IDirectMusicCollection(iface);

    TRACE("(%p/%p)->(%s, %p)\n", iface, This, debugstr_dmguid(riid), ret_iface);

    if (IsEqualIID(riid, &IID_IUnknown) ||
        IsEqualIID(riid, &IID_IDirectMusicCollection))
    {
        *ret_iface = iface;
        IDirectMusicCollection_AddRef(iface);
        return S_OK;
    }
    else if (IsEqualIID(riid, &IID_IDirectMusicObject))
    {
        *ret_iface = &This->IDirectMusicObject_iface;
        IDirectMusicCollection_AddRef(iface);
        return S_OK;
    }
    else if (IsEqualIID(riid, &IID_IPersistStream))
    {
        *ret_iface = &This->IPersistStream_iface;
        IDirectMusicCollection_AddRef(iface);
        return S_OK;
    }

    *ret_iface = NULL;

    WARN("(%p/%p)->(%s, %p): not found\n", iface, This, debugstr_dmguid(riid), ret_iface);

    return E_NOINTERFACE;
}

static ULONG WINAPI IDirectMusicCollectionImpl_IDirectMusicCollection_AddRef(LPDIRECTMUSICCOLLECTION iface)
{
    IDirectMusicCollectionImpl *This = impl_from_IDirectMusicCollection(iface);
    ULONG ref = InterlockedIncrement(&This->ref);

    TRACE("(%p/%p)->(): new ref = %u)\n", iface, This, ref);

    DMUSIC_LockModule();

    return ref;
}

static ULONG WINAPI IDirectMusicCollectionImpl_IDirectMusicCollection_Release(LPDIRECTMUSICCOLLECTION iface)
{
    IDirectMusicCollectionImpl *This = impl_from_IDirectMusicCollection(iface);
    ULONG ref = InterlockedDecrement(&This->ref);

    TRACE("(%p/%p)->(): new ref = %u)\n", iface, This, ref);

    if (!ref)
        HeapFree(GetProcessHeap(), 0, This);

    DMUSIC_UnlockModule();

    return ref;
}

/* IDirectMusicCollection Interface follows: */
static HRESULT WINAPI IDirectMusicCollectionImpl_IDirectMusicCollection_GetInstrument(LPDIRECTMUSICCOLLECTION iface, DWORD patch, IDirectMusicInstrument** instrument)
{
    IDirectMusicCollectionImpl *This = impl_from_IDirectMusicCollection(iface);
    DMUS_PRIVATE_INSTRUMENTENTRY *inst_entry;
    struct list *list_entry;
    DWORD inst_patch;

    TRACE("(%p/%p)->(%u, %p)\n", iface, This, patch, instrument);

    LIST_FOR_EACH(list_entry, &This->Instruments) {
        inst_entry = LIST_ENTRY(list_entry, DMUS_PRIVATE_INSTRUMENTENTRY, entry);
        IDirectMusicInstrument_GetPatch(inst_entry->pInstrument, &inst_patch);
        if (patch == inst_patch) {
            *instrument = inst_entry->pInstrument;
            IDirectMusicInstrument_AddRef(inst_entry->pInstrument);
            IDirectMusicInstrumentImpl_Custom_Load(inst_entry->pInstrument, This->pStm);
            TRACE(": returning instrument %p\n", *instrument);
            return S_OK;
        }
    }

    TRACE(": instrument not found\n");

    return DMUS_E_INVALIDPATCH;
}

static HRESULT WINAPI IDirectMusicCollectionImpl_IDirectMusicCollection_EnumInstrument(LPDIRECTMUSICCOLLECTION iface, DWORD index, DWORD* patch, LPWSTR name, DWORD name_length)
{
    IDirectMusicCollectionImpl *This = impl_from_IDirectMusicCollection(iface);
    DWORD i = 0;
    DMUS_PRIVATE_INSTRUMENTENTRY *inst_entry;
    struct list *list_entry;
    DWORD length;

    TRACE("(%p/%p)->(%d, %p, %p, %d)\n", iface, This, index, patch, name, name_length);

    LIST_FOR_EACH(list_entry, &This->Instruments) {
        inst_entry = LIST_ENTRY(list_entry, DMUS_PRIVATE_INSTRUMENTENTRY, entry);
        if (i == index) {
            IDirectMusicInstrumentImpl *instrument = impl_from_IDirectMusicInstrument(inst_entry->pInstrument);
            IDirectMusicInstrument_GetPatch(inst_entry->pInstrument, patch);
            if (name) {
                length = min(strlenW(instrument->wszName), name_length - 1);
                memcpy(name, instrument->wszName, length * sizeof(WCHAR));
                name[length] = '\0';
            }
            return S_OK;
        }
        i++;
    }

    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 *ret_iface)
{
    IDirectMusicCollectionImpl *This = impl_from_IDirectMusicObject(iface);
    return IDirectMusicCollection_QueryInterface(&This->IDirectMusicCollection_iface, riid, ret_iface);
}

static ULONG WINAPI IDirectMusicCollectionImpl_IDirectMusicObject_AddRef(LPDIRECTMUSICOBJECT iface)
{
    IDirectMusicCollectionImpl *This = impl_from_IDirectMusicObject(iface);
    return IDirectMusicCollection_AddRef(&This->IDirectMusicCollection_iface);
}

static ULONG WINAPI IDirectMusicCollectionImpl_IDirectMusicObject_Release(LPDIRECTMUSICOBJECT iface)
{
    IDirectMusicCollectionImpl *This = impl_from_IDirectMusicObject(iface);
    return IDirectMusicCollection_Release(&This->IDirectMusicCollection_iface);
}

static HRESULT WINAPI IDirectMusicCollectionImpl_IDirectMusicObject_GetDescriptor(LPDIRECTMUSICOBJECT iface, LPDMUS_OBJECTDESC pDesc)
{
    IDirectMusicCollectionImpl *This = impl_from_IDirectMusicObject(iface);

    TRACE("(%p/%p)->(%p)\n", iface, 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)
{
    IDirectMusicCollectionImpl *This = impl_from_IDirectMusicObject(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)
{
    IDirectMusicCollectionImpl *This = impl_from_IDirectMusicObject(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 *ret_iface)
{
    IDirectMusicCollectionImpl *This = impl_from_IPersistStream(iface);
    return IDirectMusicCollection_QueryInterface(&This->IDirectMusicCollection_iface, riid, ret_iface);
}

static ULONG WINAPI IDirectMusicCollectionImpl_IPersistStream_AddRef (LPPERSISTSTREAM iface)
{
    IDirectMusicCollectionImpl *This = impl_from_IPersistStream(iface);
    return IDirectMusicCollection_AddRef(&This->IDirectMusicCollection_iface);
}

static ULONG WINAPI IDirectMusicCollectionImpl_IPersistStream_Release (LPPERSISTSTREAM iface)
{
    IDirectMusicCollectionImpl *This = impl_from_IPersistStream(iface);
    return IDirectMusicCollection_Release(&This->IDirectMusicCollection_iface);
}

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* stream)
{
    IDirectMusicCollectionImpl *This = impl_from_IPersistStream(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(stream); /* add count for later references */
    liMove.QuadPart = 0;
    IStream_Seek(stream, liMove, STREAM_SEEK_CUR, &dlibCollectionPosition); /* store offset, in case it'll be needed later */
    This->liCollectionPosition.QuadPart = dlibCollectionPosition.QuadPart;
    This->pStm = stream;

    IStream_Read(stream, &chunk, sizeof(FOURCC) + sizeof(DWORD), NULL);
    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 E_FAIL;
    }

    IStream_Read(stream, &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 != FOURCC_DLS) {
        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;
    }

    TRACE_(dmfile)(": collection form\n");
    do {
        IStream_Read(stream, &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(stream, This->pHeader, chunk.dwSize, NULL);
                break;
            }
            case FOURCC_DLID: {
                TRACE_(dmfile)(": DLID (GUID) chunk\n");
                This->pDesc->dwValidData |= DMUS_OBJ_OBJECT;
                IStream_Read(stream, &This->pDesc->guidObject, chunk.dwSize, NULL);
                break;
            }
            case FOURCC_VERS: {
                TRACE_(dmfile)(": version chunk\n");
                This->pDesc->dwValidData |= DMUS_OBJ_VERSION;
                IStream_Read(stream, &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(stream, This->pPoolTable, sizeof(POOLTABLE), NULL);
                chunk.dwSize -= sizeof(POOLTABLE);
                This->pPoolCues = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, This->pPoolTable->cCues * sizeof(POOLCUE));
                IStream_Read(stream, This->pPoolCues, chunk.dwSize, NULL);
                break;
            }
            case FOURCC_LIST: {
                IStream_Read(stream, &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(stream, &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(stream, 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(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\n");
                                    This->szCopyright = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, chunk.dwSize);
                                    IStream_Read(stream, This->szCopyright, chunk.dwSize, NULL);
                                    if (even_or_odd(chunk.dwSize)) {
                                        ListCount[0]++;
                                        liMove.QuadPart = 1;
                                        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;
                    }
                    case FOURCC_WVPL: {
                        TRACE_(dmfile)(": wave pool list (mark & skip)\n");
                        liMove.QuadPart = 0;
                        IStream_Seek(stream, liMove, STREAM_SEEK_CUR, &dlibWavePoolPosition); /* store position */
                        This->liWavePoolTablePosition.QuadPart = dlibWavePoolPosition.QuadPart;
                        liMove.QuadPart = chunk.dwSize - sizeof(FOURCC);
                        IStream_Seek(stream, liMove, STREAM_SEEK_CUR, NULL);
                        break;
                    }
                    case FOURCC_LINS: {
                        TRACE_(dmfile)(": instruments list\n");
                        do {
                            IStream_Read(stream, &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(stream, &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 new_instrument = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, sizeof(DMUS_PRIVATE_INSTRUMENTENTRY));
                                            TRACE_(dmfile)(": instrument list\n");
                                            /* Only way to create this one... even M$ does it discretely */
                                            DMUSIC_CreateDirectMusicInstrumentImpl(&IID_IDirectMusicInstrument, (LPVOID*)&new_instrument->pInstrument, NULL);
                                            {
                                                IDirectMusicInstrumentImpl *instrument = impl_from_IDirectMusicInstrument(new_instrument->pInstrument);
                                                liMove.QuadPart = 0;
                                                IStream_Seek(stream, liMove, STREAM_SEEK_CUR, &dlibInstrumentPosition);
                                                /* Store offset, it'll be needed later */
                                                instrument->liInstrumentPosition.QuadPart = dlibInstrumentPosition.QuadPart - (2 * sizeof(FOURCC) + sizeof(DWORD));
                                                do {
                                                    IStream_Read(stream, &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");
                                                            instrument->pHeader = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, chunk.dwSize);
                                                            IStream_Read(stream, instrument->pHeader, chunk.dwSize, NULL);
                                                            break;
                                                        }
                                                        case FOURCC_DLID: {
                                                            TRACE_(dmfile)(": DLID (GUID) chunk\n");
                                                            instrument->pInstrumentID = HeapAlloc(GetProcessHeap(), HEAP_ZERO_MEMORY, chunk.dwSize);
                                                            IStream_Read(stream, instrument->pInstrumentID, chunk.dwSize, NULL);
                                                            break;
                                                        }
                                                        case FOURCC_LIST: {
                                                            IStream_Read(stream, &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(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)(": 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", instrument);
                                                    if (instrument->pInstrumentID)
                                                        TRACE(" - GUID = %s\n", debugstr_dmguid(instrument->pInstrumentID));
                                                    TRACE(" - Instrument header:\n");
                                                    TRACE("    - cRegions: %d\n", instrument->pHeader->cRegions);
                                                    TRACE("    - Locale:\n");
                                                    TRACE("       - ulBank: %d\n", instrument->pHeader->Locale.ulBank);
                                                    TRACE("       - ulInstrument: %d\n", instrument->pHeader->Locale.ulInstrument);
                                                    TRACE("       => dwPatch: %d\n", MIDILOCALE2Patch(&instrument->pHeader->Locale));
                                                }
                                                list_add_tail(&This->Instruments, &new_instrument->entry);
                                            }
                                            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)(": 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 = %d < StreamSize = %d\n", StreamCount, StreamSize);
    } while (StreamCount < StreamSize);

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


    /* 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->IDirectMusicCollection_iface);
        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->IDirectMusicCollection_iface.lpVtbl = &DirectMusicCollection_Collection_Vtbl;
	obj->IDirectMusicObject_iface.lpVtbl = &DirectMusicCollection_Object_Vtbl;
	obj->IPersistStream_iface.lpVtbl = &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 IDirectMusicCollection_QueryInterface(&obj->IDirectMusicCollection_iface, lpcGUID, ppobj);
}