Sync to trunk (r46918)

[reactos.git] / drivers / ksfilter / ks / misc.c

diff --git a/drivers/ksfilter/ks/misc.c b/drivers/ksfilter/ks/misc.c
index cc3d2cc..dc814ea 100644 (file)
--- a/drivers/ksfilter/ks/misc.c
+++ b/drivers/ksfilter/ks/misc.c
@@ -175,16 +175,21 @@ KsGetObjectTypeFromIrp(
 }
 
 /*
-    @unimplemented
+    @implemented
 */
 PUNKNOWN
 NTAPI
 KsGetOuterUnknown(
     IN PVOID  Object)
 {
-    UNIMPLEMENTED
-    return NULL;
+    PKSBASIC_HEADER BasicHeader = (PKSBASIC_HEADER)((ULONG_PTR)Object - sizeof(KSBASIC_HEADER));
+
+    /* sanity check */
+    ASSERT(BasicHeader->Type == KsObjectTypeDevice || BasicHeader->Type == KsObjectTypeFilterFactory || 
+           BasicHeader->Type == KsObjectTypeFilter || BasicHeader->Type == KsObjectTypePin);
 
+    /* return objects outer unknown */
+    return BasicHeader->OuterUnknown;
 }
 
 /*