1 files changed, 41 insertions, 0 deletions
diff --git a/third_party/libwebrtc/logging/rtc_event_log/rtc_event_processor.cc b/third_party/libwebrtc/logging/rtc_event_log/rtc_event_processor.cc
new file mode 100644
index 0000000000..e6a9983b6f
--- /dev/null
+++ b/third_party/libwebrtc/logging/rtc_event_log/rtc_event_processor.cc
@@ -0,0 +1,41 @@
+/*
+ *  Copyright 2019 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.
+ */
+#include "logging/rtc_event_log/rtc_event_processor.h"
+
+namespace webrtc {
+
+RtcEventProcessor::RtcEventProcessor() = default;
+
+RtcEventProcessor::~RtcEventProcessor() = default;
+void RtcEventProcessor::ProcessEventsInOrder() {
+  // `event_lists_` is a min-heap of lists ordered by the timestamp of the
+  // first element in the list. We therefore process the first element of the
+  // first list, then reinsert the remainder of that list into the heap
+  // if the list still contains unprocessed elements.
+  while (!event_lists_.empty()) {
+    event_lists_.front()->ProcessNext();
+    std::pop_heap(event_lists_.begin(), event_lists_.end(), Cmp);
+    if (event_lists_.back()->IsEmpty()) {
+      event_lists_.pop_back();
+    } else {
+      std::push_heap(event_lists_.begin(), event_lists_.end(), Cmp);
+    }
+  }
+}
+
+bool RtcEventProcessor::Cmp(const RtcEventProcessor::ListPtrType& a,
+                            const RtcEventProcessor::ListPtrType& b) {
+  int64_t time_diff = a->GetNextTime() - b->GetNextTime();
+  if (time_diff == 0)
+    return a->GetTieBreaker() > b->GetTieBreaker();
+  return time_diff > 0;
+}
+
+}  // namespace webrtc