1 files changed, 144 insertions, 0 deletions
diff --git a/third_party/libwebrtc/api/stats/rtc_stats_report.h b/third_party/libwebrtc/api/stats/rtc_stats_report.h
new file mode 100644
index 0000000000..1cc6293fec
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+++ b/third_party/libwebrtc/api/stats/rtc_stats_report.h
@@ -0,0 +1,144 @@
+/*
+ *  Copyright 2016 The WebRTC Project Authors. All rights reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#ifndef API_STATS_RTC_STATS_REPORT_H_
+#define API_STATS_RTC_STATS_REPORT_H_
+
+#include <stddef.h>
+#include <stdint.h>
+
+#include <map>
+#include <memory>
+#include <string>
+#include <utility>
+#include <vector>
+
+#include "api/ref_counted_base.h"
+#include "api/scoped_refptr.h"
+#include "api/stats/rtc_stats.h"
+#include "api/units/timestamp.h"
+// TODO(tommi): Remove this include after fixing iwyu issue in chromium.
+// See: third_party/blink/renderer/platform/peerconnection/rtc_stats.cc
+#include "rtc_base/ref_counted_object.h"
+#include "rtc_base/system/rtc_export.h"
+
+namespace webrtc {
+
+// A collection of stats.
+// This is accessible as a map from `RTCStats::id` to `RTCStats`.
+class RTC_EXPORT RTCStatsReport final
+    : public rtc::RefCountedNonVirtual<RTCStatsReport> {
+ public:
+  typedef std::map<std::string, std::unique_ptr<const RTCStats>> StatsMap;
+
+  class RTC_EXPORT ConstIterator {
+   public:
+    ConstIterator(ConstIterator&& other);
+    ~ConstIterator();
+
+    ConstIterator& operator++();
+    ConstIterator& operator++(int);
+    const RTCStats& operator*() const;
+    const RTCStats* operator->() const;
+    bool operator==(const ConstIterator& other) const;
+    bool operator!=(const ConstIterator& other) const;
+
+   private:
+    friend class RTCStatsReport;
+    ConstIterator(const rtc::scoped_refptr<const RTCStatsReport>& report,
+                  StatsMap::const_iterator it);
+
+    // Reference report to make sure it is kept alive.
+    rtc::scoped_refptr<const RTCStatsReport> report_;
+    StatsMap::const_iterator it_;
+  };
+
+  // TODO(bugs.webrtc.org/13756): deprecate this in favor of Timestamp.
+  // TODO(hbos): Remove "= 0" once downstream has been updated to call with a
+  // parameter.
+  static rtc::scoped_refptr<RTCStatsReport> Create(int64_t timestamp_us = 0);
+  static rtc::scoped_refptr<RTCStatsReport> Create(Timestamp timestamp);
+
+  // TODO(bugs.webrtc.org/13756): deprecate this in favor of Timestamp.
+  explicit RTCStatsReport(int64_t timestamp_us);
+  explicit RTCStatsReport(Timestamp timestamp);
+
+  RTCStatsReport(const RTCStatsReport& other) = delete;
+  rtc::scoped_refptr<RTCStatsReport> Copy() const;
+
+  int64_t timestamp_us() const { return timestamp_.us_or(-1); }
+  Timestamp timestamp() const { return timestamp_; }
+  void AddStats(std::unique_ptr<const RTCStats> stats);
+  // On success, returns a non-owning pointer to `stats`. If the stats ID is not
+  // unique, `stats` is not inserted and nullptr is returned.
+  template <typename T>
+  T* TryAddStats(std::unique_ptr<T> stats) {
+    T* stats_ptr = stats.get();
+    if (!stats_
+             .insert(std::make_pair(std::string(stats->id()), std::move(stats)))
+             .second) {
+      return nullptr;
+    }
+    return stats_ptr;
+  }
+  const RTCStats* Get(const std::string& id) const;
+  size_t size() const { return stats_.size(); }
+
+  // Gets the stat object of type `T` by ID, where `T` is any class descending
+  // from `RTCStats`.
+  // Returns null if there is no stats object for the given ID or it is the
+  // wrong type.
+  template <typename T>
+  const T* GetAs(const std::string& id) const {
+    const RTCStats* stats = Get(id);
+    if (!stats || stats->type() != T::kType) {
+      return nullptr;
+    }
+    return &stats->cast_to<const T>();
+  }
+
+  // Removes the stats object from the report, returning ownership of it or null
+  // if there is no object with `id`.
+  std::unique_ptr<const RTCStats> Take(const std::string& id);
+  // Takes ownership of all the stats in `other`, leaving it empty.
+  void TakeMembersFrom(rtc::scoped_refptr<RTCStatsReport> other);
+
+  // Stats iterators. Stats are ordered lexicographically on `RTCStats::id`.
+  ConstIterator begin() const;
+  ConstIterator end() const;
+
+  // Gets the subset of stats that are of type `T`, where `T` is any class
+  // descending from `RTCStats`.
+  template <typename T>
+  std::vector<const T*> GetStatsOfType() const {
+    std::vector<const T*> stats_of_type;
+    for (const RTCStats& stats : *this) {
+      if (stats.type() == T::kType)
+        stats_of_type.push_back(&stats.cast_to<const T>());
+    }
+    return stats_of_type;
+  }
+
+  // Creates a JSON readable string representation of the report,
+  // listing all of its stats objects.
+  std::string ToJson() const;
+
+ protected:
+  friend class rtc::RefCountedNonVirtual<RTCStatsReport>;
+  ~RTCStatsReport() = default;
+
+ private:
+  Timestamp timestamp_;
+  StatsMap stats_;
+};
+
+}  // namespace webrtc
+
+#endif  // API_STATS_RTC_STATS_REPORT_H_