MFMediaEngineNotify.h (1754B)
1 /* This Source Code Form is subject to the terms of the Mozilla Public 2 * License, v. 2.0. If a copy of the MPL was not distributed with this 3 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ 4 5 #ifndef DOM_MEDIA_PLATFORM_WMF_MFMEDIAENGINENOTIFY_H 6 #define DOM_MEDIA_PLATFORM_WMF_MFMEDIAENGINENOTIFY_H 7 8 #include <wrl.h> 9 10 #include "MFMediaEngineExtra.h" 11 #include "MediaEventSource.h" 12 #include "mozilla/Maybe.h" 13 14 namespace mozilla { 15 16 const char* MediaEngineEventToStr(MF_MEDIA_ENGINE_EVENT aEvent); 17 18 // https://docs.microsoft.com/en-us/windows/win32/api/mfmediaengine/ne-mfmediaengine-mf_media_engine_event 19 struct MFMediaEngineEventWrapper final { 20 explicit MFMediaEngineEventWrapper(MF_MEDIA_ENGINE_EVENT aEvent) 21 : mEvent(aEvent) {} 22 MF_MEDIA_ENGINE_EVENT mEvent; 23 Maybe<DWORD_PTR> mParam1; 24 Maybe<DWORD> mParam2; 25 }; 26 27 /** 28 * MFMediaEngineNotify is used to handle the event sent from the media engine. 29 * https://docs.microsoft.com/en-us/windows/win32/api/mfmediaengine/nn-mfmediaengine-imfmediaenginenotify 30 */ 31 class MFMediaEngineNotify final 32 : public Microsoft::WRL::RuntimeClass< 33 Microsoft::WRL::RuntimeClassFlags< 34 Microsoft::WRL::RuntimeClassType::ClassicCom>, 35 IMFMediaEngineNotify> { 36 public: 37 MFMediaEngineNotify() = default; 38 39 HRESULT RuntimeClassInitialize() { return S_OK; } 40 41 // Method for IMFMediaEngineNotify 42 IFACEMETHODIMP EventNotify(DWORD aEvent, DWORD_PTR aParam1, 43 DWORD aParam2) override; 44 45 MediaEventSource<MFMediaEngineEventWrapper>& MediaEngineEvent() { 46 return mEngineEvents; 47 } 48 49 private: 50 MediaEventProducer<MFMediaEngineEventWrapper> mEngineEvents; 51 }; 52 53 } // namespace mozilla 54 55 #endif // DOM_MEDIA_PLATFORM_WMF_MFMEDIAENGINENOTIFY_H