Change a disabled MediaStreamVideoTrack to output black video frames for each incoming frame.

content/renderer/media/media_stream_video_track_unittest.cc

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/callback.h"
 #include "base/message_loop/message_loop.h"
 #include "base/run_loop.h"
 #include "base/strings/utf_string_conversions.h"
 #include "base/threading/thread_checker_impl.h"
 #include "content/child/child_process.h"
 #include "content/renderer/media/media_stream_video_track.h"
 #include "content/renderer/media/mock_media_stream_video_sink.h"
 #include "content/renderer/media/mock_media_stream_video_source.h"
 #include "media/base/video_frame.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace content {
 
+const uint8 kBlackValue = 0x00;
+const uint8 kColorValue = 0xFF;

[tommi (sloooow) - chröme, 2014/08/05 09:50:46]

nit: maybe we should pick a different, harder to guess by accident, value for
'color'.

[perkj_chrome, 2014/08/06 12:32:22]

Done.

+
 ACTION_P(RunClosure, closure) {
   closure.Run();
 }
 
 class MediaStreamVideoTrackTest : public ::testing::Test {
  public:
   MediaStreamVideoTrackTest()
       : child_process_(new ChildProcess()),
         mock_source_(new MockMediaStreamVideoSource(false)),
         source_started_(false) {
     blink_source_.initialize(base::UTF8ToUTF16("dummy_source_id"),
                               blink::WebMediaStreamSource::TypeVideo,
                               base::UTF8ToUTF16("dummy_source_name"));
     blink_source_.setExtraData(mock_source_);
   }
 
   virtual ~MediaStreamVideoTrackTest() {
   }
 
   void DeliverVideoFrameAndWaitForRenderer(MockMediaStreamVideoSink* sink) {
     base::RunLoop run_loop;
     base::Closure quit_closure = run_loop.QuitClosure();
     EXPECT_CALL(*sink, OnVideoFrame()).WillOnce(
         RunClosure(quit_closure));
     scoped_refptr<media::VideoFrame> frame =
-        media::VideoFrame::CreateBlackFrame(
+        media::VideoFrame::CreateColorFrame(
             gfx::Size(MediaStreamVideoSource::kDefaultWidth,
-                      MediaStreamVideoSource::kDefaultHeight));
+                      MediaStreamVideoSource::kDefaultHeight),
+            kColorValue, kColorValue, kColorValue, base::TimeDelta());
     mock_source()->DeliverVideoFrame(frame);
     run_loop.Run();
   }
 
  protected:
   base::MessageLoop* io_message_loop() const {
     return child_process_->io_message_loop();
   }
 
   // Create a track that's associated with |mock_source_|.
@@ skipping 97 matching lines @@
   MockMediaStreamVideoSink sink;
   blink::WebMediaStreamTrack track = CreateTrack();
   MediaStreamVideoSink::AddToVideoTrack(
       &sink, sink.GetDeliverFrameCB(), track);
 
   MediaStreamVideoTrack* video_track =
       MediaStreamVideoTrack::GetVideoTrack(track);
 
   DeliverVideoFrameAndWaitForRenderer(&sink);
   EXPECT_EQ(1, sink.number_of_frames());
+  EXPECT_EQ(kColorValue, *sink.last_frame()->data(media::VideoFrame::kYPlane));
 
   video_track->SetEnabled(false);
   EXPECT_FALSE(sink.enabled());
 
-  scoped_refptr<media::VideoFrame> frame =
-      media::VideoFrame::CreateBlackFrame(
-          gfx::Size(MediaStreamVideoSource::kDefaultWidth,
-                    MediaStreamVideoSource::kDefaultHeight));
-  mock_source()->DeliverVideoFrame(frame);
-  // Wait for the IO thread to complete delivering frames.
-  io_message_loop()->RunUntilIdle();
-  EXPECT_EQ(1, sink.number_of_frames());
+  DeliverVideoFrameAndWaitForRenderer(&sink);
+  EXPECT_EQ(2, sink.number_of_frames());
+  EXPECT_EQ(kBlackValue, *sink.last_frame()->data(media::VideoFrame::kYPlane));
 
   video_track->SetEnabled(true);
   EXPECT_TRUE(sink.enabled());
-  mock_source()->DeliverVideoFrame(frame);
   DeliverVideoFrameAndWaitForRenderer(&sink);
-  EXPECT_EQ(2, sink.number_of_frames());
+  EXPECT_EQ(3, sink.number_of_frames());
+  EXPECT_EQ(kColorValue, *sink.last_frame()->data(media::VideoFrame::kYPlane));
   MediaStreamVideoSink::RemoveFromVideoTrack(&sink, track);
 }
 
 TEST_F(MediaStreamVideoTrackTest, SourceStopped) {
   MockMediaStreamVideoSink sink;
   blink::WebMediaStreamTrack track = CreateTrack();
   MediaStreamVideoSink::AddToVideoTrack(
       &sink, sink.GetDeliverFrameCB(), track);
   EXPECT_EQ(blink::WebMediaStreamSource::ReadyStateLive, sink.state());
 
@@ skipping 29 matching lines @@
   MediaStreamVideoTrack* native_track2 =
         MediaStreamVideoTrack::GetVideoTrack(track2);
   native_track2->Stop();
   EXPECT_EQ(blink::WebMediaStreamSource::ReadyStateEnded, sink2.state());
   EXPECT_EQ(blink::WebMediaStreamSource::ReadyStateEnded,
             blink_source().readyState());
   MediaStreamVideoSink::RemoveFromVideoTrack(&sink2, track2);
 }
 
 }  // namespace content