Revert of Work on flexible mode and screen sharing.

webrtc/modules/video_coding/codecs/vp9/screenshare_layers_unittest.cc

-/*
- *  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 <limits>
-
-#include "testing/gtest/include/gtest/gtest.h"
-#include "vpx/vp8cx.h"
-#include "webrtc/base/logging.h"
-#include "webrtc/modules/video_coding/codecs/vp9/screenshare_layers.h"
-#include "webrtc/modules/video_coding/codecs/vp9/vp9_impl.h"
-#include "webrtc/system_wrappers/include/clock.h"
-
-namespace webrtc {
-
-typedef VP9EncoderImpl::SuperFrameRefSettings Settings;
-
-const uint32_t kTickFrequency = 90000;
-
-class ScreenshareLayerTestVP9 : public ::testing::Test {
- protected:
-  ScreenshareLayerTestVP9() : clock_(0) {}
-  virtual ~ScreenshareLayerTestVP9() {}
-
-  void InitScreenshareLayers(int layers) {
-    layers_.reset(new ScreenshareLayersVP9(layers));
-  }
-
-  void ConfigureBitrateForLayer(int kbps, uint8_t layer_id) {
-    layers_->ConfigureBitrate(kbps, layer_id);
-  }
-
-  void AdvanceTime(int64_t milliseconds) {
-    clock_.AdvanceTimeMilliseconds(milliseconds);
-  }
-
-  void AddKilobitsToLayer(int kilobits, uint8_t layer_id) {
-    layers_->LayerFrameEncoded(kilobits * 1000 / 8, layer_id);
-  }
-
-  void EqualRefsForLayer(const Settings& actual, uint8_t layer_id) {
-    EXPECT_EQ(expected_.layer[layer_id].upd_buf,
-              actual.layer[layer_id].upd_buf);
-    EXPECT_EQ(expected_.layer[layer_id].ref_buf1,
-              actual.layer[layer_id].ref_buf1);
-    EXPECT_EQ(expected_.layer[layer_id].ref_buf2,
-              actual.layer[layer_id].ref_buf2);
-    EXPECT_EQ(expected_.layer[layer_id].ref_buf3,
-              actual.layer[layer_id].ref_buf3);
-  }
-
-  void EqualRefs(const Settings& actual) {
-    for (unsigned int layer_id = 0; layer_id < kMaxVp9NumberOfSpatialLayers;
-         ++layer_id) {
-      EqualRefsForLayer(actual, layer_id);
-    }
-  }
-
-  void EqualStartStopKeyframe(const Settings& actual) {
-    EXPECT_EQ(expected_.start_layer, actual.start_layer);
-    EXPECT_EQ(expected_.stop_layer, actual.stop_layer);
-    EXPECT_EQ(expected_.is_keyframe, actual.is_keyframe);
-  }
-
-  // Check that the settings returned by GetSuperFrameSettings() is
-  // equal to the expected_ settings.
-  void EqualToExpected() {
-    uint32_t frame_timestamp_ =
-        clock_.TimeInMilliseconds() * (kTickFrequency / 1000);
-    Settings actual =
-        layers_->GetSuperFrameSettings(frame_timestamp_, expected_.is_keyframe);
-    EqualRefs(actual);
-    EqualStartStopKeyframe(actual);
-  }
-
-  Settings expected_;
-  SimulatedClock clock_;
-  rtc::scoped_ptr<ScreenshareLayersVP9> layers_;
-};
-
-TEST_F(ScreenshareLayerTestVP9, NoRefsOnKeyFrame) {
-  const int kNumLayers = kMaxVp9NumberOfSpatialLayers;
-  InitScreenshareLayers(kNumLayers);
-  expected_.start_layer = 0;
-  expected_.stop_layer = kNumLayers - 1;
-
-  for (int l = 0; l < kNumLayers; ++l) {
-    expected_.layer[l].upd_buf = l;
-  }
-  expected_.is_keyframe = true;
-  EqualToExpected();
-
-  for (int l = 0; l < kNumLayers; ++l) {
-    expected_.layer[l].ref_buf1 = l;
-  }
-  expected_.is_keyframe = false;
-  EqualToExpected();
-}
-
-// Test if it is possible to send at a high bitrate (over the threshold)
-// after a longer period of low bitrate. This should not be possible.
-TEST_F(ScreenshareLayerTestVP9, DontAccumelateAvailableBitsOverTime) {
-  InitScreenshareLayers(2);
-  ConfigureBitrateForLayer(100, 0);
-
-  expected_.layer[0].upd_buf = 0;
-  expected_.layer[0].ref_buf1 = 0;
-  expected_.layer[1].upd_buf = 1;
-  expected_.layer[1].ref_buf1 = 1;
-  expected_.start_layer = 0;
-  expected_.stop_layer = 1;
-
-  // Send 10 frames at a low bitrate (50 kbps)
-  for (int i = 0; i < 10; ++i) {
-    AdvanceTime(200);
-    EqualToExpected();
-    AddKilobitsToLayer(10, 0);
-  }
-
-  AdvanceTime(200);
-  EqualToExpected();
-  AddKilobitsToLayer(301, 0);
-
-  // Send 10 frames at a high bitrate (200 kbps)
-  expected_.start_layer = 1;
-  for (int i = 0; i < 10; ++i) {
-    AdvanceTime(200);
-    EqualToExpected();
-    AddKilobitsToLayer(40, 1);
-  }
-}
-
-// Test if used bits are accumelated over layers, as they should;
-TEST_F(ScreenshareLayerTestVP9, AccumelateUsedBitsOverLayers) {
-  const int kNumLayers = kMaxVp9NumberOfSpatialLayers;
-  InitScreenshareLayers(kNumLayers);
-  for (int l = 0; l < kNumLayers - 1; ++l)
-    ConfigureBitrateForLayer(100, l);
-  for (int l = 0; l < kNumLayers; ++l) {
-    expected_.layer[l].upd_buf = l;
-    expected_.layer[l].ref_buf1 = l;
-  }
-
-  expected_.start_layer = 0;
-  expected_.stop_layer = kNumLayers - 1;
-  EqualToExpected();
-
-  for (int layer = 0; layer < kNumLayers - 1; ++layer) {
-    expected_.start_layer = layer;
-    EqualToExpected();
-    AddKilobitsToLayer(101, layer);
-  }
-}
-
-// General testing of the bitrate controller.
-TEST_F(ScreenshareLayerTestVP9, 2LayerBitrate) {
-  InitScreenshareLayers(2);
-  ConfigureBitrateForLayer(100, 0);
-
-  expected_.layer[0].upd_buf = 0;
-  expected_.layer[1].upd_buf = 1;
-  expected_.layer[0].ref_buf1 = -1;
-  expected_.layer[1].ref_buf1 = -1;
-  expected_.start_layer = 0;
-  expected_.stop_layer = 1;
-
-  expected_.is_keyframe = true;
-  EqualToExpected();
-  AddKilobitsToLayer(100, 0);
-
-  expected_.layer[0].ref_buf1 = 0;
-  expected_.layer[1].ref_buf1 = 1;
-  expected_.is_keyframe = false;
-  AdvanceTime(199);
-  EqualToExpected();
-  AddKilobitsToLayer(100, 0);
-
-  expected_.start_layer = 1;
-  for (int frame = 0; frame < 3; ++frame) {
-    AdvanceTime(200);
-    EqualToExpected();
-    AddKilobitsToLayer(100, 1);
-  }
-
-  // Just before enough bits become available for L0 @0.999 seconds.
-  AdvanceTime(199);
-  EqualToExpected();
-  AddKilobitsToLayer(100, 1);
-
-  // Just after enough bits become available for L0 @1.0001 seconds.
-  expected_.start_layer = 0;
-  AdvanceTime(2);
-  EqualToExpected();
-  AddKilobitsToLayer(100, 0);
-
-  // Keyframes always encode all layers, even if it is over budget.
-  expected_.layer[0].ref_buf1 = -1;
-  expected_.layer[1].ref_buf1 = -1;
-  expected_.is_keyframe = true;
-  AdvanceTime(499);
-  EqualToExpected();
-  expected_.layer[0].ref_buf1 = 0;
-  expected_.layer[1].ref_buf1 = 1;
-  expected_.start_layer = 1;
-  expected_.is_keyframe = false;
-  EqualToExpected();
-  AddKilobitsToLayer(100, 0);
-
-  // 400 kb in L0 --> @3 second mark to fall below the threshold..
-  // just before @2.999 seconds.
-  expected_.is_keyframe = false;
-  AdvanceTime(1499);
-  EqualToExpected();
-  AddKilobitsToLayer(100, 1);
-
-  // just after @3.001 seconds.
-  expected_.start_layer = 0;
-  AdvanceTime(2);
-  EqualToExpected();
-  AddKilobitsToLayer(100, 0);
-}
-
-// General testing of the bitrate controller.
-TEST_F(ScreenshareLayerTestVP9, 3LayerBitrate) {
-  InitScreenshareLayers(3);
-  ConfigureBitrateForLayer(100, 0);
-  ConfigureBitrateForLayer(100, 1);
-
-  for (int l = 0; l < 3; ++l) {
-    expected_.layer[l].upd_buf = l;
-    expected_.layer[l].ref_buf1 = l;
-  }
-  expected_.start_layer = 0;
-  expected_.stop_layer = 2;
-
-  EqualToExpected();
-  AddKilobitsToLayer(105, 0);
-  AddKilobitsToLayer(30, 1);
-
-  AdvanceTime(199);
-  EqualToExpected();
-  AddKilobitsToLayer(105, 0);
-  AddKilobitsToLayer(30, 1);
-
-  expected_.start_layer = 1;
-  AdvanceTime(200);
-  EqualToExpected();
-  AddKilobitsToLayer(130, 1);
-
-  expected_.start_layer = 2;
-  AdvanceTime(200);
-  EqualToExpected();
-
-  // 400 kb in L1 --> @1.0 second mark to fall below threshold.
-  // 210 kb in L0 --> @1.1 second mark to fall below threshold.
-  // Just before L1 @0.999 seconds.
-  AdvanceTime(399);
-  EqualToExpected();
-
-  // Just after L1 @1.001 seconds.
-  expected_.start_layer = 1;
-  AdvanceTime(2);
-  EqualToExpected();
-
-  // Just before L0 @1.099 seconds.
-  AdvanceTime(99);
-  EqualToExpected();
-
-  // Just after L0 @1.101 seconds.
-  expected_.start_layer = 0;
-  AdvanceTime(2);
-  EqualToExpected();
-
-  // @1.1 seconds
-  AdvanceTime(99);
-  EqualToExpected();
-  AddKilobitsToLayer(200, 1);
-
-  expected_.is_keyframe = true;
-  for (int l = 0; l < 3; ++l)
-    expected_.layer[l].ref_buf1 = -1;
-  AdvanceTime(200);
-  EqualToExpected();
-
-  expected_.is_keyframe = false;
-  expected_.start_layer = 2;
-  for (int l = 0; l < 3; ++l)
-    expected_.layer[l].ref_buf1 = l;
-  AdvanceTime(200);
-  EqualToExpected();
-}
-
-// Test that the bitrate calculations are
-// correct when the timestamp wrap.
-TEST_F(ScreenshareLayerTestVP9, TimestampWrap) {
-  InitScreenshareLayers(2);
-  ConfigureBitrateForLayer(100, 0);
-
-  expected_.layer[0].upd_buf = 0;
-  expected_.layer[0].ref_buf1 = 0;
-  expected_.layer[1].upd_buf = 1;
-  expected_.layer[1].ref_buf1 = 1;
-  expected_.start_layer = 0;
-  expected_.stop_layer = 1;
-
-  // Advance time to just before the timestamp wraps.
-  AdvanceTime(std::numeric_limits<uint32_t>::max() / (kTickFrequency / 1000));
-  EqualToExpected();
-  AddKilobitsToLayer(200, 0);
-
-  // Wrap
-  expected_.start_layer = 1;
-  AdvanceTime(1);
-  EqualToExpected();
-}
-
-}  // namespace webrtc