Report interframe delay sum in old GetStats

webrtc/video/receive_statistics_proxy_unittest.cc

 /*
  *  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.
  */
 
@@ skipping 79 matching lines @@
   EXPECT_EQ(rtc::Optional<uint64_t>(), statistics_proxy_->GetStats().qp_sum);
   statistics_proxy_->OnDecodedFrame(rtc::Optional<uint8_t>(3u),
                                     VideoContentType::UNSPECIFIED);
   EXPECT_EQ(rtc::Optional<uint64_t>(3u), statistics_proxy_->GetStats().qp_sum);
   statistics_proxy_->OnDecodedFrame(rtc::Optional<uint8_t>(127u),
                                     VideoContentType::UNSPECIFIED);
   EXPECT_EQ(rtc::Optional<uint64_t>(130u),
             statistics_proxy_->GetStats().qp_sum);
 }
 
+TEST_F(ReceiveStatisticsProxyTest,
+       OnDecodedFrameIncreasesInterframeDelayMsSum) {
+  const uint64_t kInterframeDelayMs1 = 100;
+  const uint64_t kInterframeDelayMs2 = 200;
+  EXPECT_EQ(0u, statistics_proxy_->GetStats().interframe_delay_sum_ms);
+  statistics_proxy_->OnDecodedFrame(rtc::Optional<uint8_t>(3u),
+                                    VideoContentType::UNSPECIFIED);
+  EXPECT_EQ(0u, statistics_proxy_->GetStats().interframe_delay_sum_ms);
+
+  fake_clock_.AdvanceTimeMilliseconds(kInterframeDelayMs1);
+  statistics_proxy_->OnDecodedFrame(rtc::Optional<uint8_t>(127u),
+                                    VideoContentType::UNSPECIFIED);
+  EXPECT_EQ(kInterframeDelayMs1,
+            statistics_proxy_->GetStats().interframe_delay_sum_ms);
+
+  fake_clock_.AdvanceTimeMilliseconds(kInterframeDelayMs2);
+  statistics_proxy_->OnDecodedFrame(rtc::Optional<uint8_t>(127u),
+                                    VideoContentType::UNSPECIFIED);
+  EXPECT_EQ(kInterframeDelayMs1 + kInterframeDelayMs2,
+            statistics_proxy_->GetStats().interframe_delay_sum_ms);
+}
+
 TEST_F(ReceiveStatisticsProxyTest, OnDecodedFrameWithoutQpQpSumWontExist) {
   EXPECT_EQ(rtc::Optional<uint64_t>(), statistics_proxy_->GetStats().qp_sum);
   statistics_proxy_->OnDecodedFrame(rtc::Optional<uint8_t>(),
                                     VideoContentType::UNSPECIFIED);
   EXPECT_EQ(rtc::Optional<uint64_t>(), statistics_proxy_->GetStats().qp_sum);
 }
 
 TEST_F(ReceiveStatisticsProxyTest, OnDecodedFrameWithoutQpResetsQpSum) {
   EXPECT_EQ(rtc::Optional<uint64_t>(), statistics_proxy_->GetStats().qp_sum);
   statistics_proxy_->OnDecodedFrame(rtc::Optional<uint8_t>(3u),
@@ skipping 580 matching lines @@
                             kFirPackets * 60 / metrics::kMinRunTimeInSeconds));
   EXPECT_EQ(
       1, metrics::NumEvents("WebRTC.Video.PliPacketsSentPerMinute",
                             kPliPackets * 60 / metrics::kMinRunTimeInSeconds));
   EXPECT_EQ(
       1, metrics::NumEvents("WebRTC.Video.NackPacketsSentPerMinute",
                             kNackPackets * 60 / metrics::kMinRunTimeInSeconds));
 }
 
 }  // namespace webrtc