BOOL installIA2Support() {
LPFNGETCLASSOBJECT IA2Dll_DllGetClassObject;
int i;
int res;
if(isIA2Installed) return TRUE;
if((IA2DllHandle=CoLoadLibrary(IA2DllPath,FALSE))==NULL) {
LOG_ERROR(L"CoLoadLibrary failed");
return FALSE;
}
IA2Dll_DllGetClassObject=(LPFNGETCLASSOBJECT)GetProcAddress(static_cast<HMODULE>(IA2DllHandle),"DllGetClassObject");
assert(IA2Dll_DllGetClassObject); //IAccessible2 proxy dll must have this function
IUnknown* ia2ClassObjPunk=NULL;
if((res=IA2Dll_DllGetClassObject(IAccessible2ProxyIID,IID_IUnknown,(LPVOID*)&ia2ClassObjPunk))!=S_OK) {
LOG_ERROR(L"Error calling DllGetClassObject, code "<<res);
CoFreeLibrary(IA2DllHandle);
IA2DllHandle=0;
return FALSE;
}
if((res=CoRegisterClassObject(IAccessible2ProxyIID,ia2ClassObjPunk,CLSCTX_INPROC_SERVER,REGCLS_MULTIPLEUSE,(LPDWORD)&IA2RegCooky))!=S_OK) {
LOG_DEBUGWARNING(L"Error registering class object, code "<<res);
ia2ClassObjPunk->Release();
CoFreeLibrary(IA2DllHandle);
IA2DllHandle=0;
return FALSE;
}
ia2ClassObjPunk->Release();
for(i=0;i<ARRAYSIZE(ia2Iids);++i) {
CoGetPSClsid(ia2Iids[i],&(_ia2PSClsidBackups[i]));
CoRegisterPSClsid(ia2Iids[i],IAccessible2ProxyIID);
}
isIA2Installed=TRUE;
return TRUE;
}
HRESULT MiniPlayer::CoCreateInstanceAx(LPCTSTR ax, REFCLSID rclsid, IUnknown *punkOuter, REFIID riid, LPVOID *ppv)
{
HINSTANCE hInst = _loadedLibs[ax];
if(hInst == NULL)
hInst = CoLoadLibrary(const_cast<LPOLESTR>(ax), 0);
if(!hInst) return -1;
_loadedLibs[ax] = hInst;
LPFNGETCLASSOBJECT pfnDllGetObjectClass = reinterpret_cast<LPFNGETCLASSOBJECT>(GetProcAddress(hInst, "DllGetClassObject"));
if(!pfnDllGetObjectClass) return -1;
IClassFactory *pClsFactory = NULL;
HRESULT hr = pfnDllGetObjectClass(rclsid, IID_IClassFactory, (void **)&pClsFactory);
IF_CHK(hr, "Unable to get Class Factory.");
return pClsFactory->CreateInstance(punkOuter, riid, ppv);
Cleanup:
if(hInst) CoFreeLibrary(hInst);
return hr;
}
HRESULT DSHelpCreateInstance(
BSTR bstrLibName,
REFCLSID rclsid, //XVID guid
LPUNKNOWN pUnkOuter, //NULL
REFIID riid, //IID_IBaseFilter
LPVOID* ppv) //IFilter
{
// Load the library (bstrlibname should have the fullpath)
HINSTANCE hDLL = CoLoadLibrary(bstrLibName, TRUE);
if (hDLL == NULL)
return E_FAIL;
// Get the function pointer
typedef HRESULT (WINAPI* PFNDllGetClassObject)(
REFCLSID rclsid,
REFIID riid,
LPVOID* ppv);
PFNDllGetClassObject pfnDllGetClassObject =
(PFNDllGetClassObject)GetProcAddress(
hDLL, "DllGetClassObject");
if (!pfnDllGetClassObject)
return E_FAIL;
// Get the class faftory
CComPtr<IClassFactory> pFactory;
HRESULT hr = pfnDllGetClassObject(rclsid, IID_IClassFactory,
(LPVOID*)&pFactory);
if (hr != S_OK)
return hr;
// Create object instance
return pFactory->CreateInstance(pUnkOuter, riid, ppv);
}
