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-rw-r--r--dom/media/eme/MediaKeyStatusMap.h92
1 files changed, 92 insertions, 0 deletions
diff --git a/dom/media/eme/MediaKeyStatusMap.h b/dom/media/eme/MediaKeyStatusMap.h
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+++ b/dom/media/eme/MediaKeyStatusMap.h
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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_MediaKeyStatuses_h
+#define mozilla_dom_MediaKeyStatuses_h
+
+#include "mozilla/Attributes.h"
+#include "nsCycleCollectionParticipant.h"
+#include "nsWrapperCache.h"
+
+#include "mozilla/dom/TypedArray.h"
+#include "mozilla/dom/MediaKeyStatusMapBinding.h"
+#include "mozilla/CDMCaps.h"
+
+class nsPIDOMWindowInner;
+
+namespace mozilla {
+class ErrorResult;
+
+namespace dom {
+
+class ArrayBufferViewOrArrayBuffer;
+
+// The MediaKeyStatusMap WebIDL interface; maps a keyId to its status.
+// Note that the underlying "map" is stored in an array, since we assume
+// that a MediaKeySession won't have many key statuses to report.
+class MediaKeyStatusMap final : public nsISupports, public nsWrapperCache {
+ public:
+ NS_DECL_CYCLE_COLLECTING_ISUPPORTS
+ NS_DECL_CYCLE_COLLECTION_WRAPPERCACHE_CLASS(MediaKeyStatusMap)
+
+ public:
+ explicit MediaKeyStatusMap(nsPIDOMWindowInner* aParent);
+
+ protected:
+ ~MediaKeyStatusMap();
+
+ public:
+ nsPIDOMWindowInner* GetParentObject() const;
+
+ JSObject* WrapObject(JSContext* aCx,
+ JS::Handle<JSObject*> aGivenProto) override;
+
+ void Get(const ArrayBufferViewOrArrayBuffer& aKey,
+ OwningMediaKeyStatusOrUndefined& aOutValue,
+ ErrorResult& aOutRv) const;
+ bool Has(const ArrayBufferViewOrArrayBuffer& aKey) const;
+ uint32_t Size() const;
+
+ uint32_t GetIterableLength() const;
+ TypedArrayCreator<ArrayBuffer> GetKeyAtIndex(uint32_t aIndex) const;
+ nsString GetKeyIDAsHexString(uint32_t aIndex) const;
+ MediaKeyStatus GetValueAtIndex(uint32_t aIndex) const;
+
+ void Update(const nsTArray<CDMCaps::KeyStatus>& keys);
+
+ private:
+ nsCOMPtr<nsPIDOMWindowInner> mParent;
+
+ struct KeyStatus {
+ KeyStatus(const nsTArray<uint8_t>& aKeyId, MediaKeyStatus aStatus)
+ : mKeyId(aKeyId.Clone()), mStatus(aStatus) {}
+ bool operator==(const KeyStatus& aOther) const {
+ return aOther.mKeyId == mKeyId;
+ }
+ bool operator<(const KeyStatus& aOther) const {
+ // Copy chromium and compare keys' bytes.
+ // Update once https://github.com/w3c/encrypted-media/issues/69
+ // is resolved.
+ const nsTArray<uint8_t>& other = aOther.mKeyId;
+ const nsTArray<uint8_t>& self = mKeyId;
+ size_t length = std::min<size_t>(other.Length(), self.Length());
+ int cmp = memcmp(self.Elements(), other.Elements(), length);
+ if (cmp != 0) {
+ return cmp < 0;
+ }
+ return self.Length() <= other.Length();
+ }
+ nsTArray<uint8_t> mKeyId;
+ MediaKeyStatus mStatus;
+ };
+
+ nsTArray<KeyStatus> mStatuses;
+};
+
+} // namespace dom
+} // namespace mozilla
+
+#endif