Move usage of QualityScaler to ViEEncoder.

webrtc/video/vie_encoder_unittest.cc

Index: webrtc/video/vie_encoder_unittest.cc
diff --git a/webrtc/video/vie_encoder_unittest.cc b/webrtc/video/vie_encoder_unittest.cc
index 9f4fdc47e33094d3577dbe4f05eb226bfb37a173..8ba8a011c4c8889da0aa84d05ec4fa5678780fb4 100644
--- a/webrtc/video/vie_encoder_unittest.cc
+++ b/webrtc/video/vie_encoder_unittest.cc
@@ -22,7 +22,12 @@
 
 namespace webrtc {
 
+using DegredationPreference = VideoSendStream::DegradationPreference;
+
 namespace {
+// Copied from vie_encoder.cc. Must be kept in sync.
+static const int kMaxCpuDowngrades = 2;
+
 class TestBuffer : public webrtc::I420Buffer {
  public:
   TestBuffer(rtc::Event* event, int width, int height)
@@ -39,32 +44,31 @@ class TestBuffer : public webrtc::I420Buffer {
 
 class ViEEncoderUnderTest : public ViEEncoder {
  public:
-  ViEEncoderUnderTest(
-      SendStatisticsProxy* stats_proxy,
-      const webrtc::VideoSendStream::Config::EncoderSettings& settings)
+  using ScalingObserverInterface::ScaleReason;
+  ViEEncoderUnderTest(SendStatisticsProxy* stats_proxy,
+                      const VideoSendStream::Config::EncoderSettings& settings)
       : ViEEncoder(1 /* number_of_cores */,
                    stats_proxy,
                    settings,
                    nullptr /* pre_encode_callback */,
                    nullptr /* encoder_timing */) {}
 
-  void TriggerCpuOveruse() {
+  void PostTaskAndWait(bool down, ScaleReason reason) {
     rtc::Event event(false, false);
-    encoder_queue()->PostTask([this, &event] {
-      OveruseDetected();
+    encoder_queue()->PostTask([this, &event, reason, down] {
+      down ? ScaleDown(reason) : ScaleUp(reason);
       event.Set();
     });
-    event.Wait(rtc::Event::kForever);
+    RTC_DCHECK(event.Wait(5000));
   }
 
-  void TriggerCpuNormalUsage() {
-    rtc::Event event(false, false);
-    encoder_queue()->PostTask([this, &event] {
-      NormalUsage();
-      event.Set();
-    });
-    event.Wait(rtc::Event::kForever);
-  }
+  void TriggerCpuOveruse() { PostTaskAndWait(true, kCpu); }
+
+  void TriggerCpuNormalUsage() { PostTaskAndWait(false, kCpu); }
+
+  void TriggerQualityLow() { PostTaskAndWait(true, kQuality); }
+
+  void TriggerQualityHigh() { PostTaskAndWait(false, kQuality); }
 };
 
 }  // namespace
@@ -134,6 +138,10 @@ class ViEEncoderTest : public ::testing::Test {
       block_next_encode_ = true;
     }
 
+    QualityScaler::Settings GetQPThresholds() const override {
+      return QualityScaler::Settings(true, 1, 2);
+    }
+
     void ContinueEncode() { continue_encode_event_.Set(); }
 
     void CheckLastTimeStampsMatch(int64_t ntp_time_ms,
@@ -411,7 +419,7 @@ TEST_F(ViEEncoderTest, SinkWantsFromOveruseDetector) {
 
   // Trigger CPU overuse kMaxCpuDowngrades times. Every time, ViEEncoder should
   // request lower resolution.
-  for (int i = 1; i <= ViEEncoder::kMaxCpuDowngrades; ++i) {
+  for (int i = 1; i <= kMaxCpuDowngrades; ++i) {
     video_source_.IncomingCapturedFrame(
         CreateFrame(i, frame_width, frame_height));
     sink_.WaitForEncodedFrame(i);
@@ -427,12 +435,12 @@ TEST_F(ViEEncoderTest, SinkWantsFromOveruseDetector) {
     frame_height /= 2;
   }
 
-  // Trigger CPU overuse a one more time. This should not trigger request for
+  // Trigger CPU overuse one more time. This should not trigger a request for
   // lower resolution.
   rtc::VideoSinkWants current_wants = video_source_.sink_wants();
-  video_source_.IncomingCapturedFrame(CreateFrame(
-      ViEEncoder::kMaxCpuDowngrades + 1, frame_width, frame_height));
-  sink_.WaitForEncodedFrame(ViEEncoder::kMaxCpuDowngrades + 1);
+  video_source_.IncomingCapturedFrame(
+      CreateFrame(kMaxCpuDowngrades + 1, frame_width, frame_height));
+  sink_.WaitForEncodedFrame(kMaxCpuDowngrades + 1);
   vie_encoder_->TriggerCpuOveruse();
   EXPECT_EQ(video_source_.sink_wants().max_pixel_count,
             current_wants.max_pixel_count);
@@ -533,6 +541,68 @@ TEST_F(ViEEncoderTest, StatsTracksAdaptationStats) {
   vie_encoder_->Stop();
 }
 
+TEST_F(ViEEncoderTest, SwitchingSourceKeepsAdaptation) {
+  const int kTargetBitrateBps = 100000;
+  vie_encoder_->OnBitrateUpdated(kTargetBitrateBps, 0, 0);
+
+  int frame_width = 1280;
+  int frame_height = 720;
+  video_source_.IncomingCapturedFrame(
+      CreateFrame(1, frame_width, frame_height));
+  sink_.WaitForEncodedFrame(1);
+
+  VideoSendStream::Stats stats = stats_proxy_->GetStats();
+  EXPECT_FALSE(stats.cpu_limited_resolution);
+  EXPECT_FALSE(stats.bw_limited_resolution);
+  EXPECT_EQ(0, stats.number_of_cpu_adapt_changes);
+
+  // Set new source with adaptation still enabled.
+  test::FrameForwarder new_video_source;
+  vie_encoder_->SetSource(&new_video_source,
+                          VideoSendStream::DegradationPreference::kBalanced);
+
+  new_video_source.IncomingCapturedFrame(
+      CreateFrame(2, frame_width, frame_height));
+  sink_.WaitForEncodedFrame(2);
+  stats = stats_proxy_->GetStats();
+  EXPECT_FALSE(stats.cpu_limited_resolution);
+  EXPECT_FALSE(stats.bw_limited_resolution);
+  EXPECT_EQ(0, stats.number_of_cpu_adapt_changes);
+
+  vie_encoder_->TriggerQualityLow();
+
+  new_video_source.IncomingCapturedFrame(
+      CreateFrame(3, frame_width, frame_height));
+  sink_.WaitForEncodedFrame(3);
+  stats = stats_proxy_->GetStats();
+  EXPECT_FALSE(stats.cpu_limited_resolution);
+  EXPECT_TRUE(stats.bw_limited_resolution);
+
+  vie_encoder_->SetSource(&new_video_source,
+                          VideoSendStream::DegradationPreference::kBalanced);
+
+  new_video_source.IncomingCapturedFrame(
+      CreateFrame(4, frame_width, frame_height));
+  sink_.WaitForEncodedFrame(4);
+  stats = stats_proxy_->GetStats();
+  EXPECT_FALSE(stats.cpu_limited_resolution);
+  EXPECT_TRUE(stats.bw_limited_resolution);
+
+  // Set adaptation disabled.
+  vie_encoder_->SetSource(
+      &new_video_source,
+      VideoSendStream::DegradationPreference::kMaintainResolution);
+
+  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, StatsTracksAdaptationStatsWhenSwitchingSource) {
   const int kTargetBitrateBps = 100000;
   vie_encoder_->OnBitrateUpdated(kTargetBitrateBps, 0, 0);
@@ -595,6 +665,64 @@ TEST_F(ViEEncoderTest, StatsTracksAdaptationStatsWhenSwitchingSource) {
   vie_encoder_->Stop();
 }
 
+TEST_F(ViEEncoderTest, StatsTracksQualityAdaptationStatsWhenSwitchingSource) {
+  const int kTargetBitrateBps = 100000;
+  vie_encoder_->OnBitrateUpdated(kTargetBitrateBps, 0, 0);
+
+  // Trigger CPU overuse.
+  vie_encoder_->TriggerQualityLow();
+  int frame_width = 1280;
+  int frame_height = 720;
+
+  video_source_.IncomingCapturedFrame(
+      CreateFrame(1, frame_width, frame_height));
+  sink_.WaitForEncodedFrame(1);
+
+  VideoSendStream::Stats stats = stats_proxy_->GetStats();
+  EXPECT_TRUE(stats.bw_limited_resolution);
+
+  // Set new source with adaptation still enabled.
+  test::FrameForwarder new_video_source;
+  vie_encoder_->SetSource(&new_video_source,
+                          VideoSendStream::DegradationPreference::kBalanced);
+
+  new_video_source.IncomingCapturedFrame(
+      CreateFrame(2, frame_width, frame_height));
+  sink_.WaitForEncodedFrame(2);
+  stats = stats_proxy_->GetStats();
+  EXPECT_TRUE(stats.bw_limited_resolution);
+
+  // Set adaptation disabled.
+  vie_encoder_->SetSource(
+      &new_video_source,
+      VideoSendStream::DegradationPreference::kMaintainResolution);
+
+  new_video_source.IncomingCapturedFrame(
+      CreateFrame(3, frame_width, frame_height));
+  sink_.WaitForEncodedFrame(3);
+  stats = stats_proxy_->GetStats();
+  EXPECT_FALSE(stats.bw_limited_resolution);
+
+  // Switch back the source with adaptation enabled.
+  vie_encoder_->SetSource(&video_source_,
+                          VideoSendStream::DegradationPreference::kBalanced);
+  video_source_.IncomingCapturedFrame(
+      CreateFrame(4, frame_width, frame_height));
+  sink_.WaitForEncodedFrame(4);
+  stats = stats_proxy_->GetStats();
+  EXPECT_TRUE(stats.bw_limited_resolution);
+
+  // Trigger CPU normal usage.
+  vie_encoder_->TriggerQualityHigh();
+  video_source_.IncomingCapturedFrame(
+      CreateFrame(5, frame_width, frame_height));
+  sink_.WaitForEncodedFrame(5);
+  stats = stats_proxy_->GetStats();
+  EXPECT_FALSE(stats.bw_limited_resolution);
+
+  vie_encoder_->Stop();
+}
+
 TEST_F(ViEEncoderTest, UMACpuLimitedResolutionInPercent) {
   const int kTargetBitrateBps = 100000;
   vie_encoder_->OnBitrateUpdated(kTargetBitrateBps, 0, 0);