dom/media/eme/MediaKeySystemAccessManager.h
author J.C. Jones <jc@mozilla.com>
Mon, 15 Jul 2019 21:40:37 +0000
changeset 482810 4d719512b650570bcb67c44ee6cdbdd17d1ad12a
parent 447000 0ceae9db9ec0be18daa1a279511ad305723185d4
permissions -rw-r--r--
Bug 1564499 - land NSS 8c6fad5544a6 UPGRADE_NSS_RELEASE, r=me

/* 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_MediaKeySystemAccessManager_h
#define mozilla_dom_MediaKeySystemAccessManager_h

#include "mozilla/dom/MediaKeySystemAccess.h"
#include "nsIObserver.h"
#include "nsCycleCollectionParticipant.h"
#include "nsISupportsImpl.h"
#include "nsITimer.h"

namespace mozilla {
namespace dom {

class DetailedPromise;
class TestGMPVideoDecoder;

class MediaKeySystemAccessManager final : public nsIObserver {
 public:
  explicit MediaKeySystemAccessManager(nsPIDOMWindowInner* aWindow);

  NS_DECL_CYCLE_COLLECTING_ISUPPORTS
  NS_DECL_CYCLE_COLLECTION_CLASS_AMBIGUOUS(MediaKeySystemAccessManager,
                                           nsIObserver)
  NS_DECL_NSIOBSERVER

  void Request(DetailedPromise* aPromise, const nsAString& aKeySystem,
               const Sequence<MediaKeySystemConfiguration>& aConfig);

  void Shutdown();

  struct PendingRequest {
    PendingRequest(DetailedPromise* aPromise, const nsAString& aKeySystem,
                   const Sequence<MediaKeySystemConfiguration>& aConfig,
                   nsITimer* aTimer);
    PendingRequest(const PendingRequest& aOther);
    ~PendingRequest();
    void CancelTimer();
    void RejectPromise(const nsCString& aReason);

    RefPtr<DetailedPromise> mPromise;
    const nsString mKeySystem;
    const Sequence<MediaKeySystemConfiguration> mConfigs;
    nsCOMPtr<nsITimer> mTimer;
  };

 private:
  enum RequestType { Initial, Subsequent };

  void Request(DetailedPromise* aPromise, const nsAString& aKeySystem,
               const Sequence<MediaKeySystemConfiguration>& aConfig,
               RequestType aType);

  ~MediaKeySystemAccessManager();

  bool EnsureObserversAdded();

  bool AwaitInstall(DetailedPromise* aPromise, const nsAString& aKeySystem,
                    const Sequence<MediaKeySystemConfiguration>& aConfig);

  void RetryRequest(PendingRequest& aRequest);

  nsTArray<PendingRequest> mRequests;

  nsCOMPtr<nsPIDOMWindowInner> mWindow;
  bool mAddedObservers;
};

}  // namespace dom
}  // namespace mozilla

#endif