Do not report quality limited resolution stats when quality scaler is disabled.

webrtc/video/vie_encoder_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.
  */
 
@@ skipping 912 matching lines @@
   new_video_source.IncomingCapturedFrame(
       CreateFrame(5, frame_width, frame_height));
   sink_.WaitForEncodedFrame(5);
   stats = stats_proxy_->GetStats();
   EXPECT_FALSE(stats.cpu_limited_resolution);
   EXPECT_FALSE(stats.bw_limited_resolution);
 
   vie_encoder_->Stop();
 }
 
+TEST_F(ViEEncoderTest, QualityAdaptationStatsAreResetWhenScalerIsDisabled) {
+  vie_encoder_->OnBitrateUpdated(kTargetBitrateBps, 0, 0);
+
+  const int kWidth = 1280;
+  const int kHeight = 720;
+  video_source_.set_adaptation_enabled(true);
+  video_source_.IncomingCapturedFrame(CreateFrame(1, kWidth, kHeight));
+  sink_.WaitForEncodedFrame(1);
+  EXPECT_FALSE(stats_proxy_->GetStats().cpu_limited_resolution);
+  EXPECT_FALSE(stats_proxy_->GetStats().bw_limited_resolution);
+  EXPECT_EQ(0, stats_proxy_->GetStats().number_of_cpu_adapt_changes);
+
+  // Trigger adapt down.
+  vie_encoder_->TriggerQualityLow();
+  video_source_.IncomingCapturedFrame(CreateFrame(2, kWidth, kHeight));
+  sink_.WaitForEncodedFrame(2);
+  EXPECT_FALSE(stats_proxy_->GetStats().cpu_limited_resolution);
+  EXPECT_TRUE(stats_proxy_->GetStats().bw_limited_resolution);
+  EXPECT_EQ(0, stats_proxy_->GetStats().number_of_cpu_adapt_changes);
+
+  // Trigger overuse.
+  vie_encoder_->TriggerCpuOveruse();
+  video_source_.IncomingCapturedFrame(CreateFrame(3, kWidth, kHeight));
+  sink_.WaitForEncodedFrame(3);
+  EXPECT_TRUE(stats_proxy_->GetStats().cpu_limited_resolution);
+  EXPECT_TRUE(stats_proxy_->GetStats().bw_limited_resolution);
+  EXPECT_EQ(1, stats_proxy_->GetStats().number_of_cpu_adapt_changes);
+
+  // Set source with adaptation still enabled but quality scaler is off.
+  fake_encoder_.SetQualityScaling(false);
+  vie_encoder_->SetSource(&video_source_,
+                          VideoSendStream::DegradationPreference::kBalanced);
+
+  video_source_.IncomingCapturedFrame(CreateFrame(4, kWidth, kHeight));
+  sink_.WaitForEncodedFrame(4);
+  EXPECT_TRUE(stats_proxy_->GetStats().cpu_limited_resolution);
+  EXPECT_FALSE(stats_proxy_->GetStats().bw_limited_resolution);
+  EXPECT_EQ(1, stats_proxy_->GetStats().number_of_cpu_adapt_changes);
+
+  vie_encoder_->Stop();
+}
+
 TEST_F(ViEEncoderTest, StatsTracksAdaptationStatsWhenSwitchingSource) {
   vie_encoder_->OnBitrateUpdated(kTargetBitrateBps, 0, 0);
 
   int frame_width = 1280;
   int frame_height = 720;
   int sequence = 1;
 
   video_source_.IncomingCapturedFrame(
       CreateFrame(sequence, frame_width, frame_height));
   sink_.WaitForEncodedFrame(sequence++);
@@ skipping 338 matching lines @@
   vie_encoder_->OnBitrateUpdated(kTargetBitrateBps, 0, 0);
   ResetEncoder("VP8", 2, 1, true);
   const int kFrameWidth = 1280;
   const int kFrameHeight = 720;
   video_source_.IncomingCapturedFrame(
       CreateFrame(1, kFrameWidth, kFrameHeight));
   sink_.ExpectDroppedFrame();
   vie_encoder_->Stop();
 }
 }  // namespace webrtc