[PATCH v4 2/5] mfplat: Implement IMFAttributes::DeleteItem().

[Jactry Zeng]

Signed-off-by: Jactry Zeng 
---
 dlls/mfplat/main.c         | 23 +++++++++++++++++++++--
 dlls/mfplat/tests/mfplat.c |  5 ++++-
 2 files changed, 25 insertions(+), 3 deletions(-)

diff --git a/dlls/mfplat/main.c b/dlls/mfplat/main.c
index 22803dc1b4..05e56ccb72 100644
--- a/dlls/mfplat/main.c
+++ b/dlls/mfplat/main.c
@@ -818,10 +818,29 @@ static HRESULT WINAPI mfattributes_SetItem(IMFAttributes *iface, REFGUID key, RE
 static HRESULT WINAPI mfattributes_DeleteItem(IMFAttributes *iface, REFGUID key)
 {
     mfattributes *This = impl_from_IMFAttributes(iface);
+    struct mfattribute *attribute = NULL;
+    size_t index = 0;

-    FIXME("%p, %s\n", This, debugstr_guid(key));
+    TRACE("(%p, %s)\n", This, debugstr_guid(key));

-    return E_NOTIMPL;
+    EnterCriticalSection(&This->lock);
+
+    attribute = mfattributes_find_item(This, key, &index);
+    if (attribute)
+    {
+        size_t count;
+
+        PropVariantClear(&attribute->value);
+
+        This->count--;
+        count = This->count - index;
+        if (count)
+            memmove(&This->attributes[index], &This->attributes[index + 1], count * sizeof(*This->attributes));
+    }
+
+    LeaveCriticalSection(&This->lock);
+
+    return S_OK;
 }

static HRESULT WINAPI mfattributes_DeleteAllItems(IMFAttributes *iface)
diff --git a/dlls/mfplat/tests/mfplat.c b/dlls/mfplat/tests/mfplat.c
index 95f13725bf..c355e792a7 100644
--- a/dlls/mfplat/tests/mfplat.c
+++ b/dlls/mfplat/tests/mfplat.c
@@ -502,7 +502,7 @@ static void test_MFCreateAttributes(void)
     ok(hr == S_OK, "IMFAttributes_SetItem failed: 0x%08x.\n", hr);

hr = IMFAttributes_DeleteItem(attributes, &DUMMY_GUID2);
-    todo_wine ok(hr == S_OK, "IMFAttributes_DeleteItem failed: 0x%08x.\n", hr);
+    ok(hr == S_OK, "IMFAttributes_DeleteItem failed: 0x%08x.\n", hr);
     key = GUID_NULL;
     if (is_win8_plus)
         hr = IMFAttributes_GetItemByIndex(attributes, 0, &key, &ret_propvar);
@@ -524,6 +524,9 @@ static void test_MFCreateAttributes(void)
     todo_wine ok(!PropVariantCompareEx(&propvar, &ret_propvar, 0, 0), "got wrong property.\n");
     todo_wine ok(IsEqualIID(&key, &DUMMY_GUID1), "got wrong key: %s.\n", wine_dbgstr_guid(&key));

+    hr = IMFAttributes_DeleteItem(attributes, &DUMMY_GUID2);
+    ok(hr == S_OK, "IMFAttributes_DeleteItem failed: 0x%08x.\n", hr);
+
     IMFAttributes_Release(attributes);
 }