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-rw-r--r--dom/media/platforms/wmf/MFMediaEngineNotify.h55
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diff --git a/dom/media/platforms/wmf/MFMediaEngineNotify.h b/dom/media/platforms/wmf/MFMediaEngineNotify.h
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+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#ifndef DOM_MEDIA_PLATFORM_WMF_MFMEDIAENGINENOTIFY_H
+#define DOM_MEDIA_PLATFORM_WMF_MFMEDIAENGINENOTIFY_H
+
+#include <wrl.h>
+
+#include "MediaEventSource.h"
+#include "MFMediaEngineExtra.h"
+#include "mozilla/Maybe.h"
+
+namespace mozilla {
+
+const char* MediaEngineEventToStr(MF_MEDIA_ENGINE_EVENT aEvent);
+
+// https://docs.microsoft.com/en-us/windows/win32/api/mfmediaengine/ne-mfmediaengine-mf_media_engine_event
+struct MFMediaEngineEventWrapper final {
+ explicit MFMediaEngineEventWrapper(MF_MEDIA_ENGINE_EVENT aEvent)
+ : mEvent(aEvent) {}
+ MF_MEDIA_ENGINE_EVENT mEvent;
+ Maybe<DWORD_PTR> mParam1;
+ Maybe<DWORD> mParam2;
+};
+
+/**
+ * MFMediaEngineNotify is used to handle the event sent from the media engine.
+ * https://docs.microsoft.com/en-us/windows/win32/api/mfmediaengine/nn-mfmediaengine-imfmediaenginenotify
+ */
+class MFMediaEngineNotify final
+ : public Microsoft::WRL::RuntimeClass<
+ Microsoft::WRL::RuntimeClassFlags<
+ Microsoft::WRL::RuntimeClassType::ClassicCom>,
+ IMFMediaEngineNotify> {
+ public:
+ MFMediaEngineNotify() = default;
+
+ HRESULT RuntimeClassInitialize() { return S_OK; }
+
+ // Method for IMFMediaEngineNotify
+ IFACEMETHODIMP EventNotify(DWORD aEvent, DWORD_PTR aParam1,
+ DWORD aParam2) override;
+
+ MediaEventSource<MFMediaEngineEventWrapper>& MediaEngineEvent() {
+ return mEngineEvents;
+ }
+
+ private:
+ MediaEventProducer<MFMediaEngineEventWrapper> mEngineEvents;
+};
+
+} // namespace mozilla
+
+#endif // DOM_MEDIA_PLATFORM_WMF_MFMEDIAENGINENOTIFY_H