video_track_unittest.cc

/*

 *  Copyright 2012 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 "pc/video_track.h"

#include <memory>

#include "media/base/fake_frame_source.h"

#include "pc/test/fake_video_track_renderer.h"

#include "pc/test/fake_video_track_source.h"

#include "pc/video_track_source.h"

#include "rtc_base/time_utils.h"

#include "test/gtest.h"

using webrtc::FakeVideoTrackRenderer;

using webrtc::FakeVideoTrackSource;

using webrtc::MediaSourceInterface;

using webrtc::MediaStreamTrackInterface;

using webrtc::VideoTrack;

using webrtc::VideoTrackInterface;

using webrtc::VideoTrackSource;

class VideoTrackTest : public ::testing::Test {

 public:

  VideoTrackTest() : frame_source_(640, 480, rtc::kNumMicrosecsPerSec / 30) {

    static const char kVideoTrackId[] = "track_id";

    video_track_source_ = rtc::make_ref_counted<FakeVideoTrackSource>(

        /*is_screencast=*/false);

    video_track_ = VideoTrack::Create(kVideoTrackId, video_track_source_,

                                      rtc::Thread::Current());

 protected:

  rtc::AutoThread main_thread_;

  rtc::scoped_refptr<FakeVideoTrackSource> video_track_source_;

  rtc::scoped_refptr<VideoTrack> video_track_;

  cricket::FakeFrameSource frame_source_;

};

// VideoTrack::Create will create an API proxy around the source object.

// The `GetSource` method provides access to the proxy object intented for API

// use while the GetSourceInternal() provides direct access to the source object

// as provided to the `VideoTrack::Create` factory function.

TEST_F(VideoTrackTest, CheckApiProxyAndInternalSource) {

  EXPECT_NE(video_track_->GetSource(), video_track_source_.get());

  EXPECT_EQ(video_track_->GetSourceInternal(), video_track_source_.get());

// Test changing the source state also changes the track state.

TEST_F(VideoTrackTest, SourceStateChangeTrackState) {

  EXPECT_EQ(MediaStreamTrackInterface::kLive, video_track_->state());

  video_track_source_->SetState(MediaSourceInterface::kEnded);

  EXPECT_EQ(MediaStreamTrackInterface::kEnded, video_track_->state());

// Test adding renderers to a video track and render to them by providing

// frames to the source.

TEST_F(VideoTrackTest, RenderVideo) {

  // FakeVideoTrackRenderer register itself to `video_track_`

  std::unique_ptr<FakeVideoTrackRenderer> renderer_1(

      new FakeVideoTrackRenderer(video_track_.get()));

  video_track_source_->InjectFrame(frame_source_.GetFrame());

  EXPECT_EQ(1, renderer_1->num_rendered_frames());

  // FakeVideoTrackRenderer register itself to `video_track_`

  std::unique_ptr<FakeVideoTrackRenderer> renderer_2(

      new FakeVideoTrackRenderer(video_track_.get()));

  video_track_source_->InjectFrame(frame_source_.GetFrame());

  EXPECT_EQ(2, renderer_1->num_rendered_frames());

  EXPECT_EQ(1, renderer_2->num_rendered_frames());

  renderer_1.reset(nullptr);

  video_track_source_->InjectFrame(frame_source_.GetFrame());

  EXPECT_EQ(2, renderer_2->num_rendered_frames());

// Test that disabling the track results in blacked out frames.

TEST_F(VideoTrackTest, DisableTrackBlackout) {

  std::unique_ptr<FakeVideoTrackRenderer> renderer(

      new FakeVideoTrackRenderer(video_track_.get()));

  video_track_source_->InjectFrame(frame_source_.GetFrame());

  EXPECT_EQ(1, renderer->num_rendered_frames());

  EXPECT_FALSE(renderer->black_frame());

  video_track_->set_enabled(false);

  video_track_source_->InjectFrame(frame_source_.GetFrame());

  EXPECT_EQ(2, renderer->num_rendered_frames());

  EXPECT_TRUE(renderer->black_frame());

  video_track_->set_enabled(true);

  video_track_source_->InjectFrame(frame_source_.GetFrame());

  EXPECT_EQ(3, renderer->num_rendered_frames());

  EXPECT_FALSE(renderer->black_frame());