static HRESULT
ITrayBandSiteImpl_LoadFromStream(IN OUT ITrayBandSiteImpl *This,
IN OUT IStream *pStm)
{
IPersistStream *pPStm;
HRESULT hRet;
ASSERT(This->BandSite != NULL);
/* We implement the undocumented COM interface IBandSiteStreamCallback
that the shell will query so that we can intercept and custom-load
the task band when it finds the task band's CLSID (which is internal).
This way we can prevent the shell from attempting to CoCreateInstance
the (internal) task band, resulting in a failure... */
hRet = IBandSite_QueryInterface(This->BandSite,
&IID_IPersistStream,
(PVOID*)&pPStm);
if (SUCCEEDED(hRet))
{
hRet = IPersistStream_Load(pPStm,
pStm);
DbgPrint("IPersistStream_Load() returned 0x%x\n", hRet);
IPersistStream_Release(pPStm);
}
return hRet;
}
static HRESULT IDirectMusicStyle8Impl_IPersistStream_LoadBand (LPPERSISTSTREAM iface, IStream* pClonedStream, IDirectMusicBand** ppBand) {
HRESULT hr = E_FAIL;
IPersistStream* pPersistStream = NULL;
hr = CoCreateInstance (&CLSID_DirectMusicBand, NULL, CLSCTX_INPROC_SERVER, &IID_IDirectMusicBand, (LPVOID*) ppBand);
if (FAILED(hr)) {
ERR(": could not create object\n");
return hr;
}
/* acquire PersistStream interface */
hr = IDirectMusicBand_QueryInterface (*ppBand, &IID_IPersistStream, (LPVOID*) &pPersistStream);
if (FAILED(hr)) {
ERR(": could not acquire IPersistStream\n");
return hr;
}
/* load */
hr = IPersistStream_Load (pPersistStream, pClonedStream);
if (FAILED(hr)) {
ERR(": failed to load object\n");
return hr;
}
/* release all loading-related stuff */
IPersistStream_Release (pPersistStream);
return S_OK;
}
static HRESULT IDirectMusicBandTrack_IPersistStream_LoadBand (LPPERSISTSTREAM iface, IStream* pClonedStream, IDirectMusicBand** ppBand,
DMUS_PRIVATE_BAND_ITEM_HEADER* pHeader) {
ICOM_THIS_MULTI(IDirectMusicBandTrack, PersistStreamVtbl, iface);
HRESULT hr = E_FAIL;
IPersistStream* pPersistStream = NULL;
hr = CoCreateInstance (&CLSID_DirectMusicBand, NULL, CLSCTX_INPROC_SERVER, &IID_IDirectMusicBand, (LPVOID*) ppBand);
if (FAILED(hr)) {
ERR(": could not create object\n");
return hr;
}
/* acquire PersistStream interface */
hr = IDirectMusicBand_QueryInterface (*ppBand, &IID_IPersistStream, (LPVOID*) &pPersistStream);
if (FAILED(hr)) {
ERR(": could not acquire IPersistStream\n");
return hr;
}
/* load */
hr = IPersistStream_Load (pPersistStream, pClonedStream);
if (FAILED(hr)) {
ERR(": failed to load object\n");
return hr;
}
/* release all loading-related stuff */
IPersistStream_Release (pPersistStream);
/*
* @TODO insert pBand into This
*/
if (SUCCEEDED(hr)) {
LPDMUS_PRIVATE_BAND pNewBand = HeapAlloc (GetProcessHeap (), HEAP_ZERO_MEMORY, sizeof(DMUS_PRIVATE_BAND));
if (NULL == pNewBand) {
ERR(": no more memory\n");
return E_OUTOFMEMORY;
}
pNewBand->BandHeader = *pHeader;
pNewBand->pBand = (IDirectMusicBandImpl*)((char*)(*ppBand) - offsetof(IDirectMusicBandImpl,BandVtbl));
IDirectMusicBand_AddRef(*ppBand);
list_add_tail (&This->Bands, &pNewBand->entry);
}
return S_OK;
}
