1 files changed, 88 insertions, 0 deletions
diff --git a/dom/media/webrtc/jsapi/WebrtcGlobalStatsHistory.h b/dom/media/webrtc/jsapi/WebrtcGlobalStatsHistory.h
new file mode 100644
index 0000000000..aa820e787d
--- /dev/null
+++ b/dom/media/webrtc/jsapi/WebrtcGlobalStatsHistory.h
@@ -0,0 +1,88 @@
+/* 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/. */
+
+#pragma once
+
+#include <memory>
+#include "domstubs.h"
+#include "mozilla/LinkedList.h"
+#include "mozilla/UniquePtr.h"
+#include "mozilla/dom/BindingDeclarations.h"
+#include "mozilla/dom/DOMString.h"
+#include "mozilla/dom/RTCStatsReportBinding.h"
+#include "nsDOMNavigationTiming.h"
+#include "nsHashKeys.h"
+#include "nsTHashMap.h"
+
+namespace mozilla::dom {
+class WebrtcGlobalStatisticsHistoryCallback;
+struct RTCStatsReportInternal;
+
+struct WebrtcGlobalStatsHistory {
+  // History preferences
+  struct Pref {
+    static auto Enabled() -> bool;
+    static auto PollIntervalMs() -> uint32_t;
+    static auto StorageWindowS() -> uint32_t;
+    static auto PruneAfterM() -> uint32_t;
+    static auto ClosedStatsToRetain() -> uint32_t;
+    Pref() = delete;
+    ~Pref() = delete;
+  };
+
+  struct Entry {
+    NS_INLINE_DECL_THREADSAFE_REFCOUNTING(Entry)
+    // We need to wrap the report in an element
+    struct ReportElement : public LinkedListElement<ReportElement> {
+      UniquePtr<RTCStatsReportInternal> report;
+      auto Timestamp() const -> DOMHighResTimeStamp;
+      virtual ~ReportElement() = default;
+    };
+    // And likewise for the SDP history
+    struct SdpElement : public LinkedListElement<SdpElement> {
+      RTCSdpHistoryEntryInternal sdp;
+      auto Timestamp() const -> DOMHighResTimeStamp;
+      virtual ~SdpElement() = default;
+    };
+
+    explicit Entry(const nsString& aPcid, const bool aIsLongTermStatsDisabled)
+        : mPcid(aPcid), mIsLongTermStatsDisabled(aIsLongTermStatsDisabled) {}
+
+    nsString mPcid;
+    AutoCleanLinkedList<ReportElement> mReports;
+    AutoCleanLinkedList<SdpElement> mSdp;
+    bool mIsLongTermStatsDisabled;
+    bool mIsClosed = false;
+
+    auto Since(const Maybe<DOMHighResTimeStamp>& aAfter) const
+        -> nsTArray<RTCStatsReportInternal>;
+    auto SdpSince(const Maybe<DOMHighResTimeStamp>& aAfter) const
+        -> RTCSdpHistoryInternal;
+
+    static auto MakeReportElement(UniquePtr<RTCStatsReportInternal> aReport)
+        -> ReportElement*;
+    static auto MakeSdpElementsSince(
+        Sequence<RTCSdpHistoryEntryInternal>&& aSdpHistory,
+        const Maybe<DOMHighResTimeStamp>& aSdpAfter)
+        -> AutoCleanLinkedList<SdpElement>;
+    auto Prune(const DOMHighResTimeStamp aBefore) -> void;
+
+   private:
+    virtual ~Entry() = default;
+  };
+  using StatsMap = nsTHashMap<nsStringHashKey, RefPtr<Entry> >;
+  static auto InitHistory(const nsAString& aPcId,
+                          const bool aIsLongTermStatsDisabled) -> void;
+  static auto Record(UniquePtr<RTCStatsReportInternal> aReport) -> void;
+  static auto CloseHistory(const nsAString& aPcId) -> void;
+  static auto GetHistory(const nsAString& aPcId) -> Maybe<RefPtr<Entry> >;
+  static auto Clear() -> void;
+  static auto PcIds() -> dom::Sequence<nsString>;
+
+  WebrtcGlobalStatsHistory() = delete;
+
+ private:
+  static auto Get() -> StatsMap&;
+};
+}  // namespace mozilla::dom