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CDMCaps.h (2598B)

      1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
      2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
      3 /* This Source Code Form is subject to the terms of the Mozilla Public
      4 * License, v. 2.0. If a copy of the MPL was not distributed with this file,
      5 * You can obtain one at http://mozilla.org/MPL/2.0/. */
      6 
      7 #ifndef CDMCaps_h_
      8 #define CDMCaps_h_
      9 
     10 #include "SamplesWaitingForKey.h"
     11 #include "mozilla/Monitor.h"
     12 #include "mozilla/dom/BindingDeclarations.h"       // For Optional
     13 #include "mozilla/dom/MediaKeyStatusMapBinding.h"  // For MediaKeyStatus
     14 #include "nsString.h"
     15 #include "nsTArray.h"
     16 
     17 namespace mozilla {
     18 
     19 // CDM capabilities; what keys a CDMProxy can use.
     20 // Must be locked to access state.
     21 class CDMCaps {
     22 public:
     23  CDMCaps();
     24  ~CDMCaps();
     25 
     26  struct KeyStatus {
     27    KeyStatus(const CencKeyId& aId, const nsString& aSessionId,
     28              dom::MediaKeyStatus aStatus)
     29        : mId(aId.Clone()), mSessionId(aSessionId), mStatus(aStatus) {}
     30    KeyStatus(const KeyStatus& aOther)
     31        : mId(aOther.mId.Clone()),
     32          mSessionId(aOther.mSessionId),
     33          mStatus(aOther.mStatus) {}
     34    bool operator==(const KeyStatus& aOther) const {
     35      return mId == aOther.mId && mSessionId == aOther.mSessionId;
     36    };
     37 
     38    CencKeyId mId;
     39    nsString mSessionId;
     40    dom::MediaKeyStatus mStatus;
     41  };
     42 
     43  bool IsKeyUsable(const CencKeyId& aKeyId);
     44 
     45  // Returns true if key status changed,
     46  // i.e. the key status changed from usable to expired.
     47  bool SetKeyStatus(const CencKeyId& aKeyId, const nsString& aSessionId,
     48                    const dom::Optional<dom::MediaKeyStatus>& aStatus);
     49 
     50  void GetKeyStatusesForSession(const nsAString& aSessionId,
     51                                nsTArray<KeyStatus>& aOutKeyStatuses);
     52 
     53  // Ensures all keys for a session are marked as 'unknown', i.e. removed.
     54  // Returns true if a key status was changed.
     55  bool RemoveKeysForSession(const nsString& aSessionId);
     56 
     57  // Notifies the SamplesWaitingForKey when key become usable.
     58  void NotifyWhenKeyIdUsable(const CencKeyId& aKey,
     59                             SamplesWaitingForKey* aSamplesWaiting);
     60 
     61 private:
     62  struct WaitForKeys {
     63    WaitForKeys(const CencKeyId& aKeyId, SamplesWaitingForKey* aListener)
     64        : mKeyId(aKeyId.Clone()), mListener(aListener) {}
     65    CencKeyId mKeyId;
     66    RefPtr<SamplesWaitingForKey> mListener;
     67  };
     68 
     69  nsTArray<KeyStatus> mKeyStatuses;
     70 
     71  nsTArray<WaitForKeys> mWaitForKeys;
     72 
     73  // It is not safe to copy this object.
     74  CDMCaps(const CDMCaps&) = delete;
     75  CDMCaps& operator=(const CDMCaps&) = delete;
     76 };
     77 
     78 }  // namespace mozilla
     79 
     80 #endif