Report timing frames info in GetStats.

webrtc/api/video/video_timing.cc

+/*
+ *  Copyright (c) 2017 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 WEBRTC_API_VIDEO_VIDEO_TIMING_CC_
+#define WEBRTC_API_VIDEO_VIDEO_TIMING_CC_
+
+#include "webrtc/api/video/video_timing.h"
+
+#include <sstream>
+

[Taylor Brandstetter, 2017/06/25 20:48:03]

nit: Extra newline

[ilnik, 2017/06/26 08:46:38]

Done.

+
+namespace webrtc {
+
+TimingFrameInfo::TimingFrameInfo()
+    : rtp_timestamp(0),
+      capture_time_ms(-1),
+      encode_start_ms(-1),
+      encode_finish_ms(-1),
+      packetization_finish_ms(-1),
+      pacer_exit_ms(-1),
+      network_timestamp_ms(-1),
+      network2_timestamp_ms(-1),
+      receive_start_ms(-1),
+      receive_finish_ms(-1),
+      decode_start_ms(-1),
+      decode_finish_ms(-1),
+      render_time_ms(-1) {}

[Taylor Brandstetter, 2017/06/25 20:48:03]

Can we use rtc::Optional instead of using -1 as a special value? Also, these
default values can be put in the header

[ilnik, 2017/06/26 08:46:38]

Since some default values will have to be reported, we would have to convert
these empty optionals to -1 anyway in the end. Thus I think it's better not to
do so.

[Taylor Brandstetter, 2017/06/27 07:01:38]

That seems like an implementation detail of the ToString method, so I'd still
prefer if the rest of the code was unaware of it. But it's not worth blocking
the CL over.

[ilnik, 2017/06/27 15:23:56]

Acknowledged.

+
+int64_t TimingFrameInfo::EndToEndDelay() const {
+  return capture_time_ms >= 0 ? decode_finish_ms - capture_time_ms : -1;
+}
+
+bool TimingFrameInfo::IsLongerThan(const TimingFrameInfo& other) const {
+  int64_t other_delay = other.EndToEndDelay();
+  return other_delay == -1 || EndToEndDelay() > other_delay;
+}
+
+std::string TimingFrameInfo::ToString() const {
+  std::stringstream out;
+  out << rtp_timestamp << ',' << capture_time_ms << ',' << encode_start_ms
+      << ',' << encode_finish_ms << ',' << packetization_finish_ms << ','
+      << pacer_exit_ms << ',' << network_timestamp_ms << ','
+      << network2_timestamp_ms << ',' << receive_start_ms << ','
+      << receive_finish_ms << ',' << decode_start_ms << ','
+      << decode_finish_ms << ',' << render_time_ms;
+  return out.str();
+}
+
+}  // namespace webrtc
+
+#endif  // WEBRTC_API_VIDEO_VIDEO_TIMING_CC_
+