[PATCH 3/3] msmpeg2vdec: Implement DllGetClassObject.

[Mohamad Al-Jaf]

Signed-off-by: Mohamad Al-Jaf 
---
 dlls/msmpeg2vdec/Makefile.in             |  3 +
 dlls/msmpeg2vdec/main.c                  | 76 +++++++++++++++++++++++-
 dlls/msmpeg2vdec/msmpeg2vdec_classes.idl | 21 +++++++
 3 files changed, 99 insertions(+), 1 deletion(-)
 create mode 100644 dlls/msmpeg2vdec/msmpeg2vdec_classes.idl

diff --git a/dlls/msmpeg2vdec/Makefile.in b/dlls/msmpeg2vdec/Makefile.in
index 54ada2f20c4..44377594b91 100644
--- a/dlls/msmpeg2vdec/Makefile.in
+++ b/dlls/msmpeg2vdec/Makefile.in
@@ -1,6 +1,9 @@
 MODULE    = msmpeg2vdec.dll
+IMPORTS   = mfuuid uuid

EXTRADLLFLAGS = -Wb,--prefer-native

C_SRCS = \
    main.c
+
+IDL_SRCS = msmpeg2vdec_classes.idl
diff --git a/dlls/msmpeg2vdec/main.c b/dlls/msmpeg2vdec/main.c
index 61ada37b2f6..7eede3d4b38 100644
--- a/dlls/msmpeg2vdec/main.c
+++ b/dlls/msmpeg2vdec/main.c
@@ -18,15 +18,89 @@

#include <stdarg.h>

+#define COBJMACROS
+
 #include "windef.h"
 #include "winbase.h"
+#include "mfidl.h"

#include "wine/debug.h"

WINE_DEFAULT_DEBUG_CHANNEL(msmpeg2vdec);

+typedef struct {
+    IClassFactory IClassFactory_iface;
+    LONG ref;
+    HRESULT (*pfnCreateInstance)(IUnknown *outer, REFIID riid, void **out);
+} msmpeg2vdec_class_factory;
+
+static inline msmpeg2vdec_class_factory *impl_from_IClassFactory(IClassFactory *iface)
+{
+    return CONTAINING_RECORD(iface, msmpeg2vdec_class_factory, IClassFactory_iface);
+}
+
+static HRESULT WINAPI ClassFactory_QueryInterface(IClassFactory *iface, REFIID riid, void **ret_iface)
+{
+    TRACE("(%p, %s, %p)\n", iface, debugstr_guid(riid), ret_iface);
+
+    if (IsEqualGUID(&IID_IUnknown, riid) ||
+        IsEqualGUID(&IID_IClassFactory, riid))
+    {
+        IClassFactory_AddRef(iface);
+        *ret_iface = iface;
+        return S_OK;
+    }
+
+    *ret_iface = NULL;
+    WARN("no interface for %s\n", debugstr_guid(riid));
+    return E_NOINTERFACE;
+}
+
+static ULONG WINAPI ClassFactory_AddRef(IClassFactory *iface)
+{
+    return 2;
+}
+
+static ULONG WINAPI ClassFactory_Release(IClassFactory *iface)
+{
+    return 1;
+}
+
+static HRESULT WINAPI MSMPEGDecoderMFTFactory_CreateInstance(IClassFactory *iface, IUnknown *outer, REFIID riid, void **obj)
+{
+    msmpeg2vdec_class_factory *factory = impl_from_IClassFactory(iface);
+
+    TRACE("(iface %p, outer %p, riid %s, obj %p)\n",
+            iface, outer, debugstr_guid(riid), obj);
+
+    return factory->pfnCreateInstance(outer, riid, obj);
+}
+
+static HRESULT WINAPI ClassFactory_LockServer(IClassFactory *iface, BOOL lock)
+{
+    FIXME("(%d) stub\n", lock);
+    return S_OK;
+}
+
+static const IClassFactoryVtbl MSMPEGDecoderMFTFactoryVtbl =
+{
+    ClassFactory_QueryInterface,
+    ClassFactory_AddRef,
+    ClassFactory_Release,
+    MSMPEGDecoderMFTFactory_CreateInstance,
+    ClassFactory_LockServer,
+};
+
+static IClassFactory MSMPEGDecoderMFTFactory = { &MSMPEGDecoderMFTFactoryVtbl };
+
 HRESULT WINAPI DllGetClassObject(REFCLSID clsid, REFIID riid, LPVOID *ppv)
 {
-    FIXME("(%s %s %p)\n", debugstr_guid(clsid), debugstr_guid(riid), ppv);
+    TRACE("(%s, %s, %p)\n", debugstr_guid(clsid), debugstr_guid(riid), ppv);
+
+    if (IsEqualGUID(clsid, &CLSID_MSMPEGDecoderMFT))
+        return ClassFactory_QueryInterface(&MSMPEGDecoderMFTFactory, riid, ppv);
+
+    WARN("Unsupported class %s.\n", debugstr_guid(clsid));
+    *ppv = NULL;
     return CLASS_E_CLASSNOTAVAILABLE;
 }
diff --git a/dlls/msmpeg2vdec/msmpeg2vdec_classes.idl b/dlls/msmpeg2vdec/msmpeg2vdec_classes.idl
new file mode 100644
index 00000000000..2df633a06dd
--- /dev/null
+++ b/dlls/msmpeg2vdec/msmpeg2vdec_classes.idl
@@ -0,0 +1,21 @@
+/*
+ * COM Classes for msmpeg2vdec
+ *
+ * Copyright 2022 Mohamad Al-Jaf
+ *
+ * This library 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 library 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 library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
+ */
+
+#pragma makedep register