mfplat: Set sample flags.

dlls/mfplat/buffer.c

@@ -475,9 +475,15 @@ static HRESULT WINAPI sample_GetSampleFlags(IMFSample *iface, DWORD *flags)
 
 static HRESULT WINAPI sample_SetSampleFlags(IMFSample *iface, DWORD flags)
 {
-    FIXME("%p, %#x.\n", iface, flags);
+    struct sample *sample = impl_from_IMFSample(iface);
 
-    return E_NOTIMPL;
+    TRACE("%p, %#x.\n", iface, flags);
+
+    EnterCriticalSection(&sample->cs);
+    sample->flags = flags;
+    LeaveCriticalSection(&sample->cs);
+
+    return S_OK;
 }
 
 static HRESULT WINAPI sample_GetSampleTime(IMFSample *iface, LONGLONG *sampletime)

dlls/mfplat/tests/mfplat.c

@@ -734,6 +734,12 @@ static void test_sample(void)
     ok(hr == S_OK, "Failed to get sample flags, hr %#x.\n", hr);
     ok(!flags, "Unexpected flags %#x.\n", flags);
 
+    hr = IMFSample_SetSampleFlags(sample, 0x123);
+    ok(hr == S_OK, "Failed to set sample flags, hr %#x.\n", hr);
+    hr = IMFSample_GetSampleFlags(sample, &flags);
+    ok(hr == S_OK, "Failed to get sample flags, hr %#x.\n", hr);
+    ok(flags == 0x123, "Unexpected flags %#x.\n", flags);
+
     hr = IMFSample_GetSampleTime(sample, &time);
 todo_wine
     ok(hr == MF_E_NO_SAMPLE_TIMESTAMP, "Unexpected hr %#x.\n", hr);