1 files changed, 544 insertions, 0 deletions
diff --git a/third_party/libwebrtc/webrtc/media/engine/videoencodersoftwarefallbackwrapper_unittest.cc b/third_party/libwebrtc/webrtc/media/engine/videoencodersoftwarefallbackwrapper_unittest.cc
new file mode 100644
index 0000000000..e39b02f71c
--- /dev/null
+++ b/third_party/libwebrtc/webrtc/media/engine/videoencodersoftwarefallbackwrapper_unittest.cc
@@ -0,0 +1,544 @@
+/*
+ *  Copyright (c) 2015 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 "media/engine/videoencodersoftwarefallbackwrapper.h"
+
+#include <utility>
+
+#include "api/video/i420_buffer.h"
+#include "modules/video_coding/codecs/vp8/include/vp8.h"
+#include "modules/video_coding/codecs/vp8/simulcast_rate_allocator.h"
+#include "modules/video_coding/codecs/vp8/temporal_layers.h"
+#include "modules/video_coding/include/video_codec_interface.h"
+#include "modules/video_coding/include/video_error_codes.h"
+#include "rtc_base/checks.h"
+#include "rtc_base/fakeclock.h"
+#include "test/field_trial.h"
+#include "test/gtest.h"
+
+namespace webrtc {
+namespace {
+const int kWidth = 320;
+const int kHeight = 240;
+const int kNumCores = 2;
+const uint32_t kFramerate = 30;
+const size_t kMaxPayloadSize = 800;
+const int kDefaultMinPixelsPerFrame = 320 * 180;
+const int kLowThreshold = 10;
+const int kHighThreshold = 20;
+}  // namespace
+
+class VideoEncoderSoftwareFallbackWrapperTest : public ::testing::Test {
+ protected:
+  VideoEncoderSoftwareFallbackWrapperTest()
+      : VideoEncoderSoftwareFallbackWrapperTest("") {}
+  explicit VideoEncoderSoftwareFallbackWrapperTest(
+      const std::string& field_trials)
+      : override_field_trials_(field_trials),
+        fake_encoder_(new CountingFakeEncoder()),
+        fallback_wrapper_(std::unique_ptr<VideoEncoder>(VP8Encoder::Create()),
+                          std::unique_ptr<VideoEncoder>(fake_encoder_)) {}
+
+  class CountingFakeEncoder : public VideoEncoder {
+   public:
+    int32_t InitEncode(const VideoCodec* codec_settings,
+                       int32_t number_of_cores,
+                       size_t max_payload_size) override {
+      ++init_encode_count_;
+      return init_encode_return_code_;
+    }
+    int32_t Encode(const VideoFrame& frame,
+                   const CodecSpecificInfo* codec_specific_info,
+                   const std::vector<FrameType>* frame_types) override {
+      ++encode_count_;
+      if (encode_complete_callback_ &&
+          encode_return_code_ == WEBRTC_VIDEO_CODEC_OK) {
+        CodecSpecificInfo info;
+        info.codec_name = ImplementationName();
+        encode_complete_callback_->OnEncodedImage(EncodedImage(), &info,
+                                                  nullptr);
+      }
+      return encode_return_code_;
+    }
+
+    int32_t RegisterEncodeCompleteCallback(
+        EncodedImageCallback* callback) override {
+      encode_complete_callback_ = callback;
+      return WEBRTC_VIDEO_CODEC_OK;
+    }
+
+    int32_t Release() override {
+      ++release_count_;
+      return WEBRTC_VIDEO_CODEC_OK;
+    }
+
+    int32_t SetChannelParameters(uint32_t packet_loss, int64_t rtt) override {
+      ++set_channel_parameters_count_;
+      return WEBRTC_VIDEO_CODEC_OK;
+    }
+
+    int32_t SetRateAllocation(const BitrateAllocation& bitrate_allocation,
+                              uint32_t framerate) override {
+      ++set_rates_count_;
+      return WEBRTC_VIDEO_CODEC_OK;
+    }
+
+    bool SupportsNativeHandle() const override {
+      ++supports_native_handle_count_;
+      return supports_native_handle_;
+    }
+
+    const char* ImplementationName() const override {
+      return "fake-encoder";
+    }
+
+    VideoEncoder::ScalingSettings GetScalingSettings() const override {
+      return VideoEncoder::ScalingSettings(true, kLowThreshold, kHighThreshold);
+    }
+
+    int init_encode_count_ = 0;
+    int32_t init_encode_return_code_ = WEBRTC_VIDEO_CODEC_OK;
+    int32_t encode_return_code_ = WEBRTC_VIDEO_CODEC_OK;
+    int encode_count_ = 0;
+    EncodedImageCallback* encode_complete_callback_ = nullptr;
+    int release_count_ = 0;
+    int set_channel_parameters_count_ = 0;
+    int set_rates_count_ = 0;
+    mutable int supports_native_handle_count_ = 0;
+    bool supports_native_handle_ = false;
+  };
+
+  class FakeEncodedImageCallback : public EncodedImageCallback {
+   public:
+    Result OnEncodedImage(
+        const EncodedImage& encoded_image,
+        const CodecSpecificInfo* codec_specific_info,
+        const RTPFragmentationHeader* fragmentation) override {
+      ++callback_count_;
+      last_codec_name_ = codec_specific_info->codec_name;
+      return Result(Result::OK, callback_count_);
+    }
+    int callback_count_ = 0;
+    std::string last_codec_name_;
+  };
+
+  void UtilizeFallbackEncoder();
+  void FallbackFromEncodeRequest();
+  void EncodeFrame();
+  void EncodeFrame(int expected_ret);
+  void CheckLastEncoderName(const char* expected_name) {
+    EXPECT_STREQ(expected_name, callback_.last_codec_name_.c_str());
+  }
+
+  test::ScopedFieldTrials override_field_trials_;
+  FakeEncodedImageCallback callback_;
+  // |fake_encoder_| is owned and released by |fallback_wrapper_|.
+  CountingFakeEncoder* fake_encoder_;
+  VideoEncoderSoftwareFallbackWrapper fallback_wrapper_;
+  VideoCodec codec_ = {};
+  std::unique_ptr<VideoFrame> frame_;
+  std::unique_ptr<SimulcastRateAllocator> rate_allocator_;
+};
+
+void VideoEncoderSoftwareFallbackWrapperTest::EncodeFrame() {
+  EncodeFrame(WEBRTC_VIDEO_CODEC_OK);
+}
+
+void VideoEncoderSoftwareFallbackWrapperTest::EncodeFrame(int expected_ret) {
+  rtc::scoped_refptr<I420Buffer> buffer =
+      I420Buffer::Create(codec_.width, codec_.height);
+  I420Buffer::SetBlack(buffer);
+  std::vector<FrameType> types(1, kVideoFrameKey);
+
+  frame_.reset(new VideoFrame(buffer, 0, 0, webrtc::kVideoRotation_0));
+  EXPECT_EQ(expected_ret, fallback_wrapper_.Encode(*frame_, nullptr, &types));
+}
+
+void VideoEncoderSoftwareFallbackWrapperTest::UtilizeFallbackEncoder() {
+  fallback_wrapper_.RegisterEncodeCompleteCallback(&callback_);
+  EXPECT_EQ(&callback_, fake_encoder_->encode_complete_callback_);
+
+  // Register with failing fake encoder. Should succeed with VP8 fallback.
+  codec_.codecType = kVideoCodecVP8;
+  codec_.maxFramerate = kFramerate;
+  codec_.width = kWidth;
+  codec_.height = kHeight;
+  codec_.VP8()->numberOfTemporalLayers = 1;
+  std::unique_ptr<TemporalLayersFactory> tl_factory(
+      new TemporalLayersFactory());
+  codec_.VP8()->tl_factory = tl_factory.get();
+  rate_allocator_.reset(
+      new SimulcastRateAllocator(codec_, std::move(tl_factory)));
+
+  fake_encoder_->init_encode_return_code_ = WEBRTC_VIDEO_CODEC_ERROR;
+  EXPECT_EQ(WEBRTC_VIDEO_CODEC_OK,
+            fallback_wrapper_.InitEncode(&codec_, kNumCores, kMaxPayloadSize));
+  EXPECT_EQ(
+      WEBRTC_VIDEO_CODEC_OK,
+      fallback_wrapper_.SetRateAllocation(
+          rate_allocator_->GetAllocation(300000, kFramerate), kFramerate));
+
+  int callback_count = callback_.callback_count_;
+  int encode_count = fake_encoder_->encode_count_;
+  EncodeFrame();
+  EXPECT_EQ(encode_count, fake_encoder_->encode_count_);
+  EXPECT_EQ(callback_count + 1, callback_.callback_count_);
+}
+
+void VideoEncoderSoftwareFallbackWrapperTest::FallbackFromEncodeRequest() {
+  fallback_wrapper_.RegisterEncodeCompleteCallback(&callback_);
+  codec_.codecType = kVideoCodecVP8;
+  codec_.maxFramerate = kFramerate;
+  codec_.width = kWidth;
+  codec_.height = kHeight;
+  codec_.VP8()->numberOfTemporalLayers = 1;
+  std::unique_ptr<TemporalLayersFactory> tl_factory(
+      new TemporalLayersFactory());
+  codec_.VP8()->tl_factory = tl_factory.get();
+  rate_allocator_.reset(
+      new SimulcastRateAllocator(codec_, std::move(tl_factory)));
+  fallback_wrapper_.InitEncode(&codec_, 2, kMaxPayloadSize);
+  EXPECT_EQ(
+      WEBRTC_VIDEO_CODEC_OK,
+      fallback_wrapper_.SetRateAllocation(
+          rate_allocator_->GetAllocation(300000, kFramerate), kFramerate));
+  EXPECT_EQ(1, fake_encoder_->init_encode_count_);
+
+  // Have the non-fallback encoder request a software fallback.
+  fake_encoder_->encode_return_code_ = WEBRTC_VIDEO_CODEC_FALLBACK_SOFTWARE;
+  int callback_count = callback_.callback_count_;
+  int encode_count = fake_encoder_->encode_count_;
+  EncodeFrame();
+  // Single encode request, which returned failure.
+  EXPECT_EQ(encode_count + 1, fake_encoder_->encode_count_);
+  EXPECT_EQ(callback_count + 1, callback_.callback_count_);
+}
+
+TEST_F(VideoEncoderSoftwareFallbackWrapperTest, InitializesEncoder) {
+  VideoCodec codec = {};
+  fallback_wrapper_.InitEncode(&codec, 2, kMaxPayloadSize);
+  EXPECT_EQ(1, fake_encoder_->init_encode_count_);
+}
+
+TEST_F(VideoEncoderSoftwareFallbackWrapperTest, EncodeRequestsFallback) {
+  FallbackFromEncodeRequest();
+  // After fallback, further encodes shouldn't hit the fake encoder.
+  int encode_count = fake_encoder_->encode_count_;
+  EncodeFrame();
+  EXPECT_EQ(encode_count, fake_encoder_->encode_count_);
+}
+
+TEST_F(VideoEncoderSoftwareFallbackWrapperTest, CanUtilizeFallbackEncoder) {
+  UtilizeFallbackEncoder();
+  EXPECT_EQ(WEBRTC_VIDEO_CODEC_OK, fallback_wrapper_.Release());
+}
+
+TEST_F(VideoEncoderSoftwareFallbackWrapperTest,
+       InternalEncoderReleasedDuringFallback) {
+  EXPECT_EQ(0, fake_encoder_->release_count_);
+  UtilizeFallbackEncoder();
+  EXPECT_EQ(1, fake_encoder_->release_count_);
+  EXPECT_EQ(WEBRTC_VIDEO_CODEC_OK, fallback_wrapper_.Release());
+  // No extra release when the fallback is released.
+  EXPECT_EQ(1, fake_encoder_->release_count_);
+}
+
+TEST_F(VideoEncoderSoftwareFallbackWrapperTest,
+       InternalEncoderNotEncodingDuringFallback) {
+  UtilizeFallbackEncoder();
+  int encode_count = fake_encoder_->encode_count_;
+  EncodeFrame();
+  EXPECT_EQ(encode_count, fake_encoder_->encode_count_);
+
+  EXPECT_EQ(WEBRTC_VIDEO_CODEC_OK, fallback_wrapper_.Release());
+}
+
+TEST_F(VideoEncoderSoftwareFallbackWrapperTest,
+       CanRegisterCallbackWhileUsingFallbackEncoder) {
+  UtilizeFallbackEncoder();
+  // Registering an encode-complete callback should still work when fallback
+  // encoder is being used.
+  FakeEncodedImageCallback callback2;
+  fallback_wrapper_.RegisterEncodeCompleteCallback(&callback2);
+  EXPECT_EQ(&callback2, fake_encoder_->encode_complete_callback_);
+
+  // Encoding a frame using the fallback should arrive at the new callback.
+  std::vector<FrameType> types(1, kVideoFrameKey);
+  frame_->set_timestamp(frame_->timestamp() + 1000);
+  EXPECT_EQ(WEBRTC_VIDEO_CODEC_OK,
+            fallback_wrapper_.Encode(*frame_, nullptr, &types));
+
+  EXPECT_EQ(WEBRTC_VIDEO_CODEC_OK, fallback_wrapper_.Release());
+}
+
+TEST_F(VideoEncoderSoftwareFallbackWrapperTest,
+       SetChannelParametersForwardedDuringFallback) {
+  UtilizeFallbackEncoder();
+  EXPECT_EQ(0, fake_encoder_->set_channel_parameters_count_);
+  fallback_wrapper_.SetChannelParameters(1, 1);
+  EXPECT_EQ(1, fake_encoder_->set_channel_parameters_count_);
+  EXPECT_EQ(WEBRTC_VIDEO_CODEC_OK, fallback_wrapper_.Release());
+}
+
+TEST_F(VideoEncoderSoftwareFallbackWrapperTest,
+       SetRatesForwardedDuringFallback) {
+  UtilizeFallbackEncoder();
+  EXPECT_EQ(1, fake_encoder_->set_rates_count_);
+  fallback_wrapper_.SetRateAllocation(BitrateAllocation(), 1);
+  EXPECT_EQ(2, fake_encoder_->set_rates_count_);
+  EXPECT_EQ(WEBRTC_VIDEO_CODEC_OK, fallback_wrapper_.Release());
+}
+
+TEST_F(VideoEncoderSoftwareFallbackWrapperTest,
+       SupportsNativeHandleForwardedWithoutFallback) {
+  fallback_wrapper_.SupportsNativeHandle();
+  EXPECT_EQ(1, fake_encoder_->supports_native_handle_count_);
+}
+
+TEST_F(VideoEncoderSoftwareFallbackWrapperTest,
+       SupportsNativeHandleNotForwardedDuringFallback) {
+  UtilizeFallbackEncoder();
+  fallback_wrapper_.SupportsNativeHandle();
+  EXPECT_EQ(0, fake_encoder_->supports_native_handle_count_);
+  EXPECT_EQ(WEBRTC_VIDEO_CODEC_OK, fallback_wrapper_.Release());
+}
+
+TEST_F(VideoEncoderSoftwareFallbackWrapperTest, ReportsImplementationName) {
+  codec_.width = kWidth;
+  codec_.height = kHeight;
+  fallback_wrapper_.RegisterEncodeCompleteCallback(&callback_);
+  fallback_wrapper_.InitEncode(&codec_, kNumCores, kMaxPayloadSize);
+  EncodeFrame();
+  CheckLastEncoderName("fake-encoder");
+}
+
+TEST_F(VideoEncoderSoftwareFallbackWrapperTest,
+       ReportsFallbackImplementationName) {
+  UtilizeFallbackEncoder();
+  // Hard coded expected value since libvpx is the software implementation name
+  // for VP8. Change accordingly if the underlying implementation does.
+  CheckLastEncoderName("libvpx");
+}
+
+namespace {
+const int kBitrateKbps = 200;
+const int kMinPixelsPerFrame = 1;
+const char kFieldTrial[] = "WebRTC-VP8-Forced-Fallback-Encoder-v2";
+}  // namespace
+
+class ForcedFallbackTest : public VideoEncoderSoftwareFallbackWrapperTest {
+ public:
+  explicit ForcedFallbackTest(const std::string& field_trials)
+      : VideoEncoderSoftwareFallbackWrapperTest(field_trials) {}
+
+  ~ForcedFallbackTest() override {}
+
+ protected:
+  void SetUp() override {
+    clock_.SetTimeMicros(1234);
+    ConfigureVp8Codec();
+  }
+
+  void TearDown() override {
+    EXPECT_EQ(WEBRTC_VIDEO_CODEC_OK, fallback_wrapper_.Release());
+  }
+
+  void ConfigureVp8Codec() {
+    fallback_wrapper_.RegisterEncodeCompleteCallback(&callback_);
+    std::unique_ptr<TemporalLayersFactory> tl_factory(
+        new TemporalLayersFactory());
+    codec_.codecType = kVideoCodecVP8;
+    codec_.maxFramerate = kFramerate;
+    codec_.width = kWidth;
+    codec_.height = kHeight;
+    codec_.VP8()->numberOfTemporalLayers = 1;
+    codec_.VP8()->automaticResizeOn = true;
+    codec_.VP8()->frameDroppingOn = true;
+    codec_.VP8()->tl_factory = tl_factory.get();
+    rate_allocator_.reset(
+        new SimulcastRateAllocator(codec_, std::move(tl_factory)));
+  }
+
+  void InitEncode(int width, int height) {
+    codec_.width = width;
+    codec_.height = height;
+    EXPECT_EQ(WEBRTC_VIDEO_CODEC_OK, fallback_wrapper_.InitEncode(
+                                         &codec_, kNumCores, kMaxPayloadSize));
+    SetRateAllocation(kBitrateKbps);
+  }
+
+  void SetRateAllocation(uint32_t bitrate_kbps) {
+    EXPECT_EQ(WEBRTC_VIDEO_CODEC_OK, fallback_wrapper_.SetRateAllocation(
+                                         rate_allocator_->GetAllocation(
+                                             bitrate_kbps * 1000, kFramerate),
+                                         kFramerate));
+  }
+
+  void EncodeFrameAndVerifyLastName(const char* expected_name) {
+    EncodeFrameAndVerifyLastName(expected_name, WEBRTC_VIDEO_CODEC_OK);
+  }
+
+  void EncodeFrameAndVerifyLastName(const char* expected_name,
+                                    int expected_ret) {
+    EncodeFrame(expected_ret);
+    CheckLastEncoderName(expected_name);
+  }
+
+  rtc::ScopedFakeClock clock_;
+};
+
+class ForcedFallbackTestEnabled : public ForcedFallbackTest {
+ public:
+  ForcedFallbackTestEnabled()
+      : ForcedFallbackTest(std::string(kFieldTrial) + "/Enabled-" +
+                           std::to_string(kMinPixelsPerFrame) + "," +
+                           std::to_string(kWidth * kHeight) + ",30000/") {}
+};
+
+class ForcedFallbackTestDisabled : public ForcedFallbackTest {
+ public:
+  ForcedFallbackTestDisabled()
+      : ForcedFallbackTest(std::string(kFieldTrial) + "/Disabled/") {}
+};
+
+TEST_F(ForcedFallbackTestDisabled, NoFallbackWithoutFieldTrial) {
+  // Resolution above max threshold.
+  InitEncode(kWidth + 1, kHeight);
+  EXPECT_EQ(1, fake_encoder_->init_encode_count_);
+  EncodeFrameAndVerifyLastName("fake-encoder");
+
+  // Resolution at max threshold.
+  InitEncode(kWidth, kHeight);
+  EncodeFrameAndVerifyLastName("fake-encoder");
+}
+
+TEST_F(ForcedFallbackTestEnabled, FallbackIfAtMaxResolutionLimit) {
+  // Resolution above max threshold.
+  InitEncode(kWidth + 1, kHeight);
+  EXPECT_EQ(1, fake_encoder_->init_encode_count_);
+  EncodeFrameAndVerifyLastName("fake-encoder");
+
+  // Resolution at max threshold.
+  InitEncode(kWidth, kHeight);
+  EncodeFrameAndVerifyLastName("libvpx");
+}
+
+TEST_F(ForcedFallbackTestEnabled, FallbackIsKeptWhenInitEncodeIsCalled) {
+  // Resolution above max threshold.
+  InitEncode(kWidth + 1, kHeight);
+  EXPECT_EQ(1, fake_encoder_->init_encode_count_);
+  EncodeFrameAndVerifyLastName("fake-encoder");
+
+  // Resolution at max threshold.
+  InitEncode(kWidth, kHeight);
+  EncodeFrameAndVerifyLastName("libvpx");
+
+  // Re-initialize encoder, still expect fallback.
+  InitEncode(kWidth / 2, kHeight / 2);
+  EXPECT_EQ(1, fake_encoder_->init_encode_count_);  // No change.
+  EncodeFrameAndVerifyLastName("libvpx");
+}
+
+TEST_F(ForcedFallbackTestEnabled, FallbackIsEndedWhenResolutionIsTooLarge) {
+  // Resolution above max threshold.
+  InitEncode(kWidth + 1, kHeight);
+  EXPECT_EQ(1, fake_encoder_->init_encode_count_);
+  EncodeFrameAndVerifyLastName("fake-encoder");
+
+  // Resolution at max threshold.
+  InitEncode(kWidth, kHeight);
+  EncodeFrameAndVerifyLastName("libvpx");
+
+  // Re-initialize encoder with a larger resolution, expect no fallback.
+  InitEncode(kWidth + 1, kHeight);
+  EXPECT_EQ(2, fake_encoder_->init_encode_count_);
+  EncodeFrameAndVerifyLastName("fake-encoder");
+}
+
+TEST_F(ForcedFallbackTestEnabled, FallbackIsEndedForNonValidSettings) {
+  // Resolution at max threshold.
+  InitEncode(kWidth, kHeight);
+  EncodeFrameAndVerifyLastName("libvpx");
+
+  // Re-initialize encoder with invalid setting, expect no fallback.
+  codec_.VP8()->numberOfTemporalLayers = 2;
+  InitEncode(kWidth, kHeight);
+  EXPECT_EQ(1, fake_encoder_->init_encode_count_);
+  EncodeFrameAndVerifyLastName("fake-encoder");
+
+  // Re-initialize encoder with valid setting but fallback disabled from now on.
+  codec_.VP8()->numberOfTemporalLayers = 1;
+  InitEncode(kWidth, kHeight);
+  EXPECT_EQ(2, fake_encoder_->init_encode_count_);
+  EncodeFrameAndVerifyLastName("fake-encoder");
+}
+
+TEST_F(ForcedFallbackTestEnabled, MultipleStartEndFallback) {
+  const int kNumRuns = 5;
+  for (int i = 1; i <= kNumRuns; ++i) {
+    // Resolution at max threshold.
+    InitEncode(kWidth, kHeight);
+    EncodeFrameAndVerifyLastName("libvpx");
+    // Resolution above max threshold.
+    InitEncode(kWidth + 1, kHeight);
+    EXPECT_EQ(i, fake_encoder_->init_encode_count_);
+    EncodeFrameAndVerifyLastName("fake-encoder");
+  }
+}
+
+TEST_F(ForcedFallbackTestDisabled, GetScaleSettings) {
+  // Resolution above max threshold.
+  InitEncode(kWidth + 1, kHeight);
+  EXPECT_EQ(1, fake_encoder_->init_encode_count_);
+  EncodeFrameAndVerifyLastName("fake-encoder");
+
+  // Default min pixels per frame should be used.
+  const auto settings = fallback_wrapper_.GetScalingSettings();
+  EXPECT_TRUE(settings.enabled);
+  EXPECT_EQ(kDefaultMinPixelsPerFrame, settings.min_pixels_per_frame);
+}
+
+TEST_F(ForcedFallbackTestEnabled, GetScaleSettingsWithNoFallback) {
+  // Resolution above max threshold.
+  InitEncode(kWidth + 1, kHeight);
+  EncodeFrameAndVerifyLastName("fake-encoder");
+
+  // Configured min pixels per frame should be used.
+  const auto settings = fallback_wrapper_.GetScalingSettings();
+  EXPECT_TRUE(settings.enabled);
+  EXPECT_EQ(kMinPixelsPerFrame, settings.min_pixels_per_frame);
+  ASSERT_TRUE(settings.thresholds);
+  EXPECT_EQ(kLowThreshold, settings.thresholds->low);
+  EXPECT_EQ(kHighThreshold, settings.thresholds->high);
+}
+
+TEST_F(ForcedFallbackTestEnabled, GetScaleSettingsWithFallback) {
+  // Resolution at max threshold.
+  InitEncode(kWidth, kHeight);
+  EncodeFrameAndVerifyLastName("libvpx");
+
+  // Configured min pixels per frame should be used.
+  const auto settings = fallback_wrapper_.GetScalingSettings();
+  EXPECT_TRUE(settings.enabled);
+  EXPECT_EQ(kMinPixelsPerFrame, settings.min_pixels_per_frame);
+}
+
+TEST_F(ForcedFallbackTestEnabled, ScalingDisabledIfResizeOff) {
+  // Resolution at max threshold.
+  codec_.VP8()->automaticResizeOn = false;
+  InitEncode(kWidth, kHeight);
+  EncodeFrameAndVerifyLastName("libvpx");
+
+  // Should be disabled for automatic resize off.
+  const auto settings = fallback_wrapper_.GetScalingSettings();
+  EXPECT_FALSE(settings.enabled);
+}
+
+}  // namespace webrtc