MediaKeySession.h - mozsearch

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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

/* vim: set ts=8 sts=2 et sw=2 tw=80: */

/* 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 mozilla_dom_MediaKeySession_h

#define mozilla_dom_MediaKeySession_h

#include "DecoderDoctorLogger.h"

#include "mozilla/Attributes.h"

#include "nsCycleCollectionParticipant.h"

#include "mozilla/DOMEventTargetHelper.h"

#include "nsCOMPtr.h"

#include "mozilla/dom/TypedArray.h"

#include "mozilla/Mutex.h"

#include "mozilla/dom/Promise.h"

#include "mozilla/DetailedPromise.h"

#include "mozilla/dom/MediaKeySessionBinding.h"

#include "mozilla/dom/MediaKeysBinding.h"

#include "mozilla/dom/MediaKeyMessageEventBinding.h"

struct JSContext;

namespace mozilla {

class ErrorResult;

namespace dom {

class MediaKeySession;

}  // namespace dom

DDLoggedTypeName(dom::MediaKeySession);

namespace dom {

class ArrayBufferViewOrArrayBuffer;

class MediaKeyError;

class MediaKeyStatusMap;

nsString ToString(MediaKeySessionType aType);

class MediaKeySession final : public DOMEventTargetHelper,

                              public DecoderDoctorLifeLogger<MediaKeySession> {

 public:

  NS_DECL_ISUPPORTS_INHERITED

  NS_DECL_CYCLE_COLLECTION_CLASS_INHERITED(MediaKeySession,

                                           DOMEventTargetHelper)

 public:

  MediaKeySession(nsPIDOMWindowInner* aParent, MediaKeys* aKeys,

                  const nsAString& aKeySystem, MediaKeySessionType aSessionType,

                  bool aHardwareDecryption, ErrorResult& aRv);

  void SetSessionId(const nsAString& aSessionId);

  JSObject* WrapObject(JSContext* aCx,

                       JS::Handle<JSObject*> aGivenProto) override;

  // Mark this as resultNotAddRefed to return raw pointers

  MediaKeyError* GetError() const;

  MediaKeyStatusMap* KeyStatuses() const;

  void GetSessionId(nsString& aRetval) const;

  const nsString& GetSessionId() const;

  // Number of ms since epoch at which expiration occurs, or NaN if unknown.

  // TODO: The type of this attribute is still under contention.

  // https://www.w3.org/Bugs/Public/show_bug.cgi?id=25902

  double Expiration() const;

  Promise* Closed() const;

  already_AddRefed<Promise> GenerateRequest(

      const nsAString& aInitDataType,

      const ArrayBufferViewOrArrayBuffer& aInitData, ErrorResult& aRv);

  already_AddRefed<Promise> Load(const nsAString& aSessionId, ErrorResult& aRv);

  already_AddRefed<Promise> Update(const ArrayBufferViewOrArrayBuffer& response,

                                   ErrorResult& aRv);

  already_AddRefed<Promise> Close(ErrorResult& aRv);

  already_AddRefed<Promise> Remove(ErrorResult& aRv);

  void DispatchKeyMessage(MediaKeyMessageType aMessageType,

                          const nsTArray<uint8_t>& aMessage);

  void DispatchKeyError(uint32_t system_code);

  void DispatchKeyStatusesChange();

  void OnClosed();

  bool IsClosed() const;

  void SetExpiration(double aExpiry);

  mozilla::dom::EventHandlerNonNull* GetOnkeystatuseschange();

  void SetOnkeystatuseschange(mozilla::dom::EventHandlerNonNull* aCallback);

  mozilla::dom::EventHandlerNonNull* GetOnmessage();

  void SetOnmessage(mozilla::dom::EventHandlerNonNull* aCallback);

  // Process-unique identifier.

  uint32_t Token() const;

 private:

  ~MediaKeySession();

  void UpdateKeyStatusMap();

  bool IsCallable() const {

    // The EME spec sets the "callable value" to true whenever the CDM sets

    // the sessionId. When the session is initialized, sessionId is empty and

    // callable is thus false.

    return !mSessionId.IsEmpty();

  already_AddRefed<DetailedPromise> MakePromise(ErrorResult& aRv,

                                                const nsACString& aName);

  // EME spec, starting from 6.6.2.7

  // https://w3c.github.io/encrypted-media/

  void CompleteGenerateRequest(const nsString& aInitDataType,

                               nsTArray<uint8_t>& aData,

                               DetailedPromise* aPromise);

  RefPtr<DetailedPromise> mClosed;

  RefPtr<MediaKeyError> mMediaKeyError;

  RefPtr<MediaKeys> mKeys;

  const nsString mKeySystem;

  nsString mSessionId;

  const MediaKeySessionType mSessionType;

  const uint32_t mToken;

  bool mIsClosed;

  bool mUninitialized;

  RefPtr<MediaKeyStatusMap> mKeyStatusMap;

  double mExpiration;

  // True if this key session is related with hardware decryption.

  bool mHardwareDecryption;

};

}  // namespace dom

}  // namespace mozilla

#endif