Rework PerformanceTracker to make it usable with WebRTC

remoting/protocol/frame_stats.h

+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef REMOTING_PROTOCOL_FRAME_STATS_H_
+#define REMOTING_PROTOCOL_FRAME_STATS_H_
+
+#include "base/time/time.h"
+
+namespace remoting {
+
+class VideoPacket;
+
+namespace protocol {
+
+// Struct used to track timestamp for various events in the video pipeline for a
+// single video frame
+struct FrameStats {
+  FrameStats();
+  FrameStats(const FrameStats&);
+  ~FrameStats();
+
+  // Copies timing fields from the |packet|.
+  static FrameStats GetForVideoPacket(const VideoPacket& packet);
+
+  int frame_size = 0;
+
+  // Set to null for frames that were not sent after a fresh input event.
+  base::TimeTicks latest_event_timestamp;
+
+  // Set to TimeDelta::Max() when unknown.
+  base::TimeDelta capture_delay = base::TimeDelta::Max();
+  base::TimeDelta encode_delay = base::TimeDelta::Max();
+  base::TimeDelta capture_pending_delay = base::TimeDelta::Max();
+  base::TimeDelta capture_overhead_delay = base::TimeDelta::Max();
+  base::TimeDelta encode_pending_delay = base::TimeDelta::Max();
+  base::TimeDelta send_pending_delay = base::TimeDelta::Max();
+
+  base::TimeTicks time_received;
+  base::TimeTicks time_decoded;
+  base::TimeTicks time_rendered;
+};
+
+}  // namespace protocol
+}  // namespace remoting
+
+#endif  // REMOTING_PROTOCOL_FRAME_STATS_H_