MFMediaEngineExtension.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_MFMEDIAENGINEEXTENSION_H

#define DOM_MEDIA_PLATFORM_WMF_MFMEDIAENGINEEXTENSION_H

#include <wrl.h>

#include "MFMediaEngineExtra.h"

namespace mozilla {

/**

 * MFMediaEngineNotify is used to load media resources in the media engine.

 * https://docs.microsoft.com/en-us/windows/win32/api/mfmediaengine/nn-mfmediaengine-imfmediaengineextension

*/

class MFMediaEngineExtension final

    : public Microsoft::WRL::RuntimeClass<

          Microsoft::WRL::RuntimeClassFlags<

              Microsoft::WRL::RuntimeClassType::ClassicCom>,

          IMFMediaEngineExtension> {

 public:

  MFMediaEngineExtension() = default;

  HRESULT RuntimeClassInitialize() { return S_OK; }

  void SetMediaSource(IMFMediaSource* aMediaSource);

  // Method for MFMediaEngineExtension

  IFACEMETHODIMP BeginCreateObject(BSTR aUrl, IMFByteStream* aByteStream,

                                   MF_OBJECT_TYPE aType,

                                   IUnknown** aCancelCookie,

                                   IMFAsyncCallback* aCallback,

                                   IUnknown* aState) override;

  IFACEMETHODIMP CancelObjectCreation(IUnknown* aCancelCookie) override;

  IFACEMETHODIMP EndCreateObject(IMFAsyncResult* aResult,

                                 IUnknown** aRetObj) override;

  IFACEMETHODIMP CanPlayType(BOOL aIsAudioOnly, BSTR aMimeType,

                             MF_MEDIA_ENGINE_CANPLAY* aResult) override;

 private:

  bool mIsObjectCreating = false;

  Microsoft::WRL::ComPtr<IMFMediaSource> mMediaSource;

};

}  // namespace mozilla

#endif  // DOM_MEDIA_PLATFORM_WMF_MFMEDIAENGINEEXTENSION_H