[PATCH 6/9] mfreadwrite: Implement create_transform_from_activate.

[Ziqing Hui]

From: Ziqing Hui

---
 dlls/mfreadwrite/writer.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/dlls/mfreadwrite/writer.c b/dlls/mfreadwrite/writer.c
index 5e7a67d944f..0e279dfb3fd 100644
--- a/dlls/mfreadwrite/writer.c
+++ b/dlls/mfreadwrite/writer.c
@@ -175,7 +175,15 @@ static HRESULT create_marker_context(unsigned int marker_type, void *user_contex

static HRESULT create_transform_from_activate(IMFActivate *activate, struct transform *out_transform)
 {
-    return E_NOTIMPL;
+    struct transform transform;
+    HRESULT hr;
+
+    if (FAILED(hr = IMFActivate_GetGUID(activate, &MF_TRANSFORM_CATEGORY_Attribute, &transform.category)))
+        return hr;
+    if (SUCCEEDED(hr = IMFActivate_ActivateObject(activate, &IID_IMFTransform, (void **)&transform.transform)))
+        *out_transform = transform;
+
+    return hr;
 }

static void stream_release_transforms(struct stream *stream)