Nikolay Sivov : mfplat: Do not make a copy when returning GUID attributes (Valgrind).

[Alexandre Julliard]

Module: wine
Branch: master
Commit: c091f9b7f6cbc776f0448c0879bf9dbe472de720
URL:    https://source.winehq.org/git/wine.git/?a=commit;h=c091f9b7f6cbc776f0448c0879bf9dbe472de720

Author: Nikolay Sivov <nsivov at codeweavers.com>
Date:   Tue Nov 26 13:35:29 2019 +0300

mfplat: Do not make a copy when returning GUID attributes (Valgrind).

Signed-off-by: Nikolay Sivov <nsivov at codeweavers.com>
Signed-off-by: Alexandre Julliard <julliard at winehq.org>

---

 dlls/mfplat/main.c | 23 ++++++++++++++++-------
 1 file changed, 16 insertions(+), 7 deletions(-)

diff --git a/dlls/mfplat/main.c b/dlls/mfplat/main.c
index 48e64adeef..6336b1b347 100644
--- a/dlls/mfplat/main.c
+++ b/dlls/mfplat/main.c
@@ -1349,14 +1349,23 @@ HRESULT attributes_GetDouble(struct attributes *attributes, REFGUID key, double
 
 HRESULT attributes_GetGUID(struct attributes *attributes, REFGUID key, GUID *value)
 {
-    PROPVARIANT attrval;
-    HRESULT hr;
+    struct attribute *attribute;
+    HRESULT hr = S_OK;
 
-    PropVariantInit(&attrval);
-    attrval.vt = VT_CLSID;
-    hr = attributes_get_item(attributes, key, &attrval);
-    if (SUCCEEDED(hr))
-        *value = *attrval.u.puuid;
+    EnterCriticalSection(&attributes->cs);
+
+    attribute = attributes_find_item(attributes, key, NULL);
+    if (attribute)
+    {
+        if (attribute->value.vt == MF_ATTRIBUTE_GUID)
+            *value = *attribute->value.u.puuid;
+        else
+            hr = MF_E_INVALIDTYPE;
+    }
+    else
+        hr = MF_E_ATTRIBUTENOTFOUND;
+
+    LeaveCriticalSection(&attributes->cs);
 
     return hr;
 }