evr: Fix crash when clearing input type for the mixer.

dlls/evr/mixer.c

@@ -240,7 +240,7 @@ static void video_mixer_clear_types(struct video_mixer *mixer)
     free(mixer->output.rt_formats);
     if (mixer->output.media_type)
         IMFMediaType_Release(mixer->output.media_type);
-    mixer->output.media_type = NULL;
+    memset(&mixer->output, 0, sizeof(mixer->output));
 }
 
 static HRESULT WINAPI video_mixer_inner_QueryInterface(IUnknown *iface, REFIID riid, void **obj)
@@ -855,12 +855,17 @@ static HRESULT WINAPI video_mixer_transform_SetInputType(IMFTransform *iface, DW
 
     TRACE("%p, %lu, %p, %#lx.\n", iface, id, media_type, flags);
 
+    if (!media_type && (flags & MFT_SET_TYPE_TEST_ONLY))
+        return E_INVALIDARG;
+
     EnterCriticalSection(&mixer->cs);
 
     if (!(flags & MFT_SET_TYPE_TEST_ONLY))
         video_mixer_clear_types(mixer);
 
-    if (!mixer->device_manager)
+    if (!media_type)
+        hr = S_OK;
+    else if (!mixer->device_manager)
         hr = MF_E_NOT_INITIALIZED;
     else
     {

dlls/evr/tests/evr.c

@@ -1249,6 +1249,11 @@ static void test_default_mixer_type_negotiation(void)
         goto done;
     }
 
+    hr = IMFTransform_SetInputType(transform, 0, NULL, 0);
+    ok(hr == S_OK, "Unexpected hr %#lx.\n", hr);
+    hr = IMFTransform_SetInputType(transform, 0, NULL, MFT_SET_TYPE_TEST_ONLY);
+    ok(hr == E_INVALIDARG, "Unexpected hr %#lx.\n", hr);
+
     hr = DXVA2CreateDirect3DDeviceManager9(&token, &manager);
     ok(hr == S_OK, "Unexpected hr %#lx.\n", hr);
 
@@ -1469,9 +1474,48 @@ static void test_default_mixer_type_negotiation(void)
     hr = IMFTransform_GetOutputCurrentType(transform, 0, &media_type2);
     ok(hr == S_OK, "Unexpected hr %#lx.\n", hr);
     ok(media_type == media_type2, "Unexpected media type instance.\n");
+
+    IMFMediaType_Release(media_type);
+
+    /* Clear input types */
+    hr = IMFTransform_SetInputType(transform, 0, NULL, MFT_SET_TYPE_TEST_ONLY);
+    ok(hr == E_INVALIDARG, "Unexpected hr %#lx.\n", hr);
+
+    hr = IMFTransform_SetInputType(transform, 0, NULL, 0);
+    ok(hr == S_OK, "Unexpected hr %#lx.\n", hr);
+    hr = IMFTransform_GetInputCurrentType(transform, 0, &media_type);
+    ok(hr == MF_E_TRANSFORM_TYPE_NOT_SET, "Unexpected hr %#lx.\n", hr);
+    hr = IMFTransform_GetOutputCurrentType(transform, 0, &media_type);
+    ok(hr == MF_E_TRANSFORM_TYPE_NOT_SET, "Unexpected hr %#lx.\n", hr);
+
+    /* Restore types */
+    hr = IMFTransform_SetOutputType(transform, 0, media_type2, 0);
+    ok(hr == MF_E_INVALIDMEDIATYPE, "Unexpected hr %#lx.\n", hr);
+    hr = IMFTransform_GetOutputCurrentType(transform, 0, &media_type);
+    ok(hr == MF_E_TRANSFORM_TYPE_NOT_SET, "Unexpected hr %#lx.\n", hr);
+
+    hr = IMFTransform_SetInputType(transform, 0, video_type, 0);
+    ok(hr == S_OK, "Unexpected hr %#lx.\n", hr);
+    hr = IMFTransform_GetInputCurrentType(transform, 0, &media_type);
+    ok(hr == S_OK, "Unexpected hr %#lx.\n", hr);
+    ok(media_type == video_type, "Unexpected media type instance.\n");
+    IMFMediaType_Release(media_type);
+
+    hr = IMFTransform_SetOutputType(transform, 0, media_type2, 0);
+    ok(hr == S_OK, "Unexpected hr %#lx.\n", hr);
+    hr = IMFTransform_GetOutputCurrentType(transform, 0, &media_type);
+    ok(hr == S_OK, "Unexpected hr %#lx.\n", hr);
+    ok(media_type2 == media_type, "Unexpected media type instance.\n");
+
     IMFMediaType_Release(media_type2);
     IMFMediaType_Release(media_type);
 
+    /* Resetting type twice */
+    hr = IMFTransform_SetInputType(transform, 0, NULL, 0);
+    ok(hr == S_OK, "Unexpected hr %#lx.\n", hr);
+    hr = IMFTransform_SetInputType(transform, 0, NULL, 0);
+    ok(hr == S_OK, "Unexpected hr %#lx.\n", hr);
+
     IMFVideoProcessor_Release(processor);
 
     IMFMediaType_Release(video_type);