Add experimental simulcast screen content mode

webrtc/media/engine/webrtcvideoengine2_unittest.cc

 /*
  *  Copyright (c) 2004 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 3909 matching lines @@
   TestReceiverLocalSsrcConfiguration(false);
 }
 
 TEST_F(WebRtcVideoChannel2Test, ConfiguresLocalSsrcOnExistingReceivers) {
   TestReceiverLocalSsrcConfiguration(true);
 }
 
 class WebRtcVideoChannel2SimulcastTest : public testing::Test {
  public:
   WebRtcVideoChannel2SimulcastTest()
-      : fake_call_(webrtc::Call::Config(&event_log_)) {}
+      : fake_call_(webrtc::Call::Config(&event_log_)), last_ssrc_(0) {}
 
   void SetUp() override {
     engine_.Init();
     channel_.reset(
         engine_.CreateChannel(&fake_call_, MediaConfig(), VideoOptions()));
     channel_->OnReadyToSend(true);
     last_ssrc_ = 123;
   }
 
  protected:
   void VerifySimulcastSettings(const VideoCodec& codec,
                                int capture_width,
                                int capture_height,
                                size_t num_configured_streams,
-                               size_t expected_num_streams) {
+                               size_t expected_num_streams,
+                               bool screenshare) {
     cricket::VideoSendParameters parameters;
+    VideoOptions options;
     parameters.codecs.push_back(codec);
+    if (screenshare) {
+      parameters.conference_mode = true;
+      options.is_screencast = rtc::Optional<bool>(screenshare);
+    }
     ASSERT_TRUE(channel_->SetSendParameters(parameters));
 
     std::vector<uint32_t> ssrcs = MAKE_VECTOR(kSsrcs3);
     RTC_DCHECK(num_configured_streams <= ssrcs.size());
     ssrcs.resize(num_configured_streams);
 
     FakeVideoSendStream* stream =
         AddSendStream(CreateSimStreamParams("cname", ssrcs));
     // Send a full-size frame to trigger a stream reconfiguration to use all
     // expected simulcast layers.
     cricket::FakeVideoCapturer capturer;
     EXPECT_TRUE(
-        channel_->SetVideoSend(ssrcs.front(), true, nullptr, &capturer));
+        channel_->SetVideoSend(ssrcs.front(), true, &options, &capturer));
     EXPECT_EQ(cricket::CS_RUNNING, capturer.Start(cricket::VideoFormat(
                                        capture_width, capture_height,
                                        cricket::VideoFormat::FpsToInterval(30),
                                        cricket::FOURCC_I420)));
     channel_->SetSend(true);
     EXPECT_TRUE(capturer.CaptureFrame());
 
     std::vector<webrtc::VideoStream> video_streams = stream->GetVideoStreams();
     ASSERT_EQ(expected_num_streams, video_streams.size());
 
     std::vector<webrtc::VideoStream> expected_streams = GetSimulcastConfig(
         num_configured_streams, capture_width, capture_height, 0, kDefaultQpMax,
-        kDefaultVideoMaxFramerate);
+        kDefaultVideoMaxFramerate, screenshare);
 
     ASSERT_EQ(expected_streams.size(), video_streams.size());
 
     size_t num_streams = video_streams.size();
     int total_max_bitrate_bps = 0;
     for (size_t i = 0; i < num_streams; ++i) {
       EXPECT_EQ(expected_streams[i].width, video_streams[i].width);
       EXPECT_EQ(expected_streams[i].height, video_streams[i].height);
 
       EXPECT_GT(video_streams[i].max_framerate, 0);
@@ skipping 62 matching lines @@
   }
 
   webrtc::RtcEventLogNullImpl event_log_;
   FakeCall fake_call_;
   WebRtcVideoEngine2 engine_;
   std::unique_ptr<VideoMediaChannel> channel_;
   uint32_t last_ssrc_;
 };
 
 TEST_F(WebRtcVideoChannel2SimulcastTest, SetSendCodecsWith2SimulcastStreams) {
-  VerifySimulcastSettings(cricket::VideoCodec("VP8"), 640, 360, 2, 2);
+  VerifySimulcastSettings(cricket::VideoCodec("VP8"), 640, 360, 2, 2, false);
 }
 
 TEST_F(WebRtcVideoChannel2SimulcastTest, SetSendCodecsWith3SimulcastStreams) {
-  VerifySimulcastSettings(cricket::VideoCodec("VP8"), 1280, 720, 3, 3);
+  VerifySimulcastSettings(cricket::VideoCodec("VP8"), 1280, 720, 3, 3, false);
 }
 
 // Test that we normalize send codec format size in simulcast.
 TEST_F(WebRtcVideoChannel2SimulcastTest, SetSendCodecsWithOddSizeInSimulcast) {
-  VerifySimulcastSettings(cricket::VideoCodec("VP8"), 541, 271, 2, 2);
+  VerifySimulcastSettings(cricket::VideoCodec("VP8"), 541, 271, 2, 2, false);
 }
+
+TEST_F(WebRtcVideoChannel2SimulcastTest, SetSendCodecsForScreenshare) {
+  VerifySimulcastSettings(cricket::VideoCodec("VP8"), 1280, 720, 3, 1, true);
+}
+
+TEST_F(WebRtcVideoChannel2SimulcastTest, SetSendCodecsForSimulcastScreenshare) {
+  webrtc::test::ScopedFieldTrials override_field_trials_(
+      "WebRTC-SimulcastScreenshare/Enabled/");
+  VerifySimulcastSettings(cricket::VideoCodec("VP8"), 1280, 720, 3, 2, true);
+}
+
 }  // namespace cricket