Add stats for frequency offset when converting RTP timestamp to NTP time.

webrtc/video/receive_statistics_proxy_unittest.cc

+/*
+ *  Copyright (c) 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.
+ */
+
+#include "webrtc/video/receive_statistics_proxy.h"
+
+#include <memory>
+
+#include "webrtc/system_wrappers/include/metrics_default.h"
+#include "webrtc/test/gtest.h"
+
+namespace webrtc {
+namespace {
+const uint32_t kLocalSsrc = 123;
+const uint32_t kRemoteSsrc = 456;
+const int kMinRequiredSamples = 200;
+const int64_t kFreqOffsetProcessIntervalInMs = 40000;
+}  // namespace
+
+class ReceiveStatisticsProxyTest : public ::testing::Test {
+ public:
+  ReceiveStatisticsProxyTest() : clock_(1234), config_(GetTestConfig()) {}
+  virtual ~ReceiveStatisticsProxyTest() {}
+
+ protected:
+  virtual void SetUp() {
+    metrics::Reset();
+    statistics_proxy_.reset(new ReceiveStatisticsProxy(&config_, &clock_));
+  }
+
+  VideoReceiveStream::Config GetTestConfig() {
+    VideoReceiveStream::Config config(nullptr);
+    config.rtp.local_ssrc = kLocalSsrc;
+    config.rtp.remote_ssrc = kRemoteSsrc;
+    return config;
+  }
+
+  SimulatedClock clock_;
+  const VideoReceiveStream::Config config_;
+  std::unique_ptr<ReceiveStatisticsProxy> statistics_proxy_;
+};
+
+TEST_F(ReceiveStatisticsProxyTest, GetStats_VerifySsrc) {
+  EXPECT_EQ(kRemoteSsrc, statistics_proxy_->GetStats().ssrc);
+}
+
+TEST_F(ReceiveStatisticsProxyTest, GetStats_VerifyPayloadType) {
+  const int kPayloadType = 111;
+  statistics_proxy_->OnIncomingPayloadType(kPayloadType);
+  EXPECT_EQ(kPayloadType, statistics_proxy_->GetStats().current_payload_type);
+}
+
+TEST_F(ReceiveStatisticsProxyTest, GetStats_VerifyDiscardedPackets) {
+  const int kDiscardedPackets = 12;
+  statistics_proxy_->OnDiscardedPacketsUpdated(kDiscardedPackets);
+  EXPECT_EQ(kDiscardedPackets, statistics_proxy_->GetStats().discarded_packets);
+}
+
+TEST_F(ReceiveStatisticsProxyTest, GetStats_VerifyDecodeTimingStats) {
+  const int kDecodeMs = 1;
+  const int kMaxDecodeMs = 2;
+  const int kCurrentDelayMs = 3;
+  const int kTargetDelayMs = 4;
+  const int kJitterBufferMs = 5;
+  const int kMinPlayoutDelayMs = 6;
+  const int kRenderDelayMs = 7;
+  const int64_t kRttMs = 8;
+  statistics_proxy_->OnDecoderTiming(
+      kDecodeMs, kMaxDecodeMs, kCurrentDelayMs, kTargetDelayMs, kJitterBufferMs,
+      kMinPlayoutDelayMs, kRenderDelayMs, kRttMs);
+  VideoReceiveStream::Stats stats = statistics_proxy_->GetStats();
+  EXPECT_EQ(kDecodeMs, stats.decode_ms);
+  EXPECT_EQ(kMaxDecodeMs, stats.max_decode_ms);
+  EXPECT_EQ(kCurrentDelayMs, stats.current_delay_ms);
+  EXPECT_EQ(kTargetDelayMs, stats.target_delay_ms);
+  EXPECT_EQ(kJitterBufferMs, stats.jitter_buffer_ms);
+  EXPECT_EQ(kMinPlayoutDelayMs, stats.min_playout_delay_ms);
+  EXPECT_EQ(kRenderDelayMs, stats.render_delay_ms);
+}
+
+TEST_F(ReceiveStatisticsProxyTest, LifetimeHistogramIsUpdated) {
+  const int64_t kTimeSec = 3;
+  clock_.AdvanceTimeMilliseconds(kTimeSec * 1000);
+  statistics_proxy_.reset();
+  EXPECT_EQ(1,
+            metrics::NumSamples("WebRTC.Video.ReceiveStreamLifetimeInSeconds"));
+  EXPECT_EQ(1, metrics::NumEvents("WebRTC.Video.ReceiveStreamLifetimeInSeconds",
+                                  kTimeSec));
+}
+
+TEST_F(ReceiveStatisticsProxyTest, AvSyncOffsetHistogramIsUpdated) {
+  const int64_t kSyncOffsetMs = 22;
+  const double kFreqKhz = 90.0;
+  for (int i = 0; i < kMinRequiredSamples; ++i)
+    statistics_proxy_->OnSyncOffsetUpdated(kSyncOffsetMs, kFreqKhz);
+
+  statistics_proxy_.reset();
+  EXPECT_EQ(1, metrics::NumSamples("WebRTC.Video.AVSyncOffsetInMs"));
+  EXPECT_EQ(1,
+            metrics::NumEvents("WebRTC.Video.AVSyncOffsetInMs", kSyncOffsetMs));
+}
+
+TEST_F(ReceiveStatisticsProxyTest, RtpToNtpFrequencyOffsetHistogramIsUpdated) {
+  const int64_t kSyncOffsetMs = 22;
+  const double kFreqKhz = 90.0;
+  statistics_proxy_->OnSyncOffsetUpdated(kSyncOffsetMs, kFreqKhz);
+  statistics_proxy_->OnSyncOffsetUpdated(kSyncOffsetMs, kFreqKhz + 2.2);
+  clock_.AdvanceTimeMilliseconds(kFreqOffsetProcessIntervalInMs);
+  // Process interval passed, max diff: 2.
+  statistics_proxy_->OnSyncOffsetUpdated(kSyncOffsetMs, kFreqKhz + 1.1);
+  statistics_proxy_->OnSyncOffsetUpdated(kSyncOffsetMs, kFreqKhz - 4.2);
+  statistics_proxy_->OnSyncOffsetUpdated(kSyncOffsetMs, kFreqKhz - 0.9);
+  clock_.AdvanceTimeMilliseconds(kFreqOffsetProcessIntervalInMs);
+  // Process interval passed, max diff: 4.
+  statistics_proxy_->OnSyncOffsetUpdated(kSyncOffsetMs, kFreqKhz);
+  statistics_proxy_.reset();
+  // Average reported: (2 + 4) / 2 = 3.
+  EXPECT_EQ(1, metrics::NumSamples("WebRTC.Video.RtpToNtpFreqOffsetInKhz"));
+  EXPECT_EQ(1, metrics::NumEvents("WebRTC.Video.RtpToNtpFreqOffsetInKhz", 3));
+}
+
+}  // namespace webrtc