media/cast/video_sender/video_encoder_impl_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 <vector>

#include "base/bind.h"
#include "base/memory/ref_counted.h"
#include "base/memory/scoped_ptr.h"
#include "media/base/video_frame.h"
#include "media/cast/cast_defines.h"
#include "media/cast/cast_environment.h"
#include "media/cast/test/fake_single_thread_task_runner.h"
#include "media/cast/test/utility/video_utility.h"
#include "media/cast/video_sender/video_encoder_impl.h"
#include "testing/gmock/include/gmock/gmock.h"

namespace media {
namespace cast {

using testing::_;

namespace {
class TestVideoEncoderCallback
    : public base::RefCountedThreadSafe<TestVideoEncoderCallback> {
 public:
  TestVideoEncoderCallback() {}

  void SetExpectedResult(uint32 expected_frame_id,
                         uint32 expected_last_referenced_frame_id,
                         const base::TimeTicks& expected_capture_time) {
    expected_frame_id_ = expected_frame_id;
    expected_last_referenced_frame_id_ = expected_last_referenced_frame_id;
    expected_capture_time_ = expected_capture_time;
  }

  void DeliverEncodedVideoFrame(
      scoped_ptr<transport::EncodedFrame> encoded_frame) {
    if (expected_frame_id_ == expected_last_referenced_frame_id_) {
      EXPECT_EQ(transport::EncodedFrame::KEY, encoded_frame->dependency);
    } else {
      EXPECT_EQ(transport::EncodedFrame::DEPENDENT,
                encoded_frame->dependency);
    }
    EXPECT_EQ(expected_frame_id_, encoded_frame->frame_id);
    EXPECT_EQ(expected_last_referenced_frame_id_,
              encoded_frame->referenced_frame_id);
    EXPECT_EQ(expected_capture_time_, encoded_frame->reference_time);
  }

 protected:
  virtual ~TestVideoEncoderCallback() {}

 private:
  friend class base::RefCountedThreadSafe<TestVideoEncoderCallback>;

  uint32 expected_frame_id_;
  uint32 expected_last_referenced_frame_id_;
  base::TimeTicks expected_capture_time_;

  DISALLOW_COPY_AND_ASSIGN(TestVideoEncoderCallback);
};
}  // namespace

class VideoEncoderImplTest : public ::testing::Test {
 protected:
  VideoEncoderImplTest()
      : test_video_encoder_callback_(new TestVideoEncoderCallback()) {
    video_config_.rtp_config.ssrc = 1;
    video_config_.incoming_feedback_ssrc = 2;
    video_config_.rtp_config.payload_type = 127;
    video_config_.use_external_encoder = false;
    video_config_.width = 320;
    video_config_.height = 240;
    video_config_.max_bitrate = 5000000;
    video_config_.min_bitrate = 1000000;
    video_config_.start_bitrate = 2000000;
    video_config_.max_qp = 56;
    video_config_.min_qp = 0;
    video_config_.max_frame_rate = 30;
    video_config_.max_number_of_video_buffers_used = 3;
    video_config_.codec = transport::kVp8;
    gfx::Size size(video_config_.width, video_config_.height);
    video_frame_ = media::VideoFrame::CreateFrame(
        VideoFrame::I420, size, gfx::Rect(size), size, base::TimeDelta());
    PopulateVideoFrame(video_frame_, 123);
  }

  virtual ~VideoEncoderImplTest() {}

  virtual void SetUp() OVERRIDE {
    testing_clock_ = new base::SimpleTestTickClock();
    task_runner_ = new test::FakeSingleThreadTaskRunner(testing_clock_);
    cast_environment_ =
        new CastEnvironment(scoped_ptr<base::TickClock>(testing_clock_).Pass(),
                            task_runner_,
                            task_runner_,
                            task_runner_);
  }

  virtual void TearDown() OVERRIDE {
    video_encoder_.reset();
    task_runner_->RunTasks();
  }

  void Configure(int max_unacked_frames) {
    video_encoder_.reset(new VideoEncoderImpl(
        cast_environment_, video_config_, max_unacked_frames));
  }

  base::SimpleTestTickClock* testing_clock_;  // Owned by CastEnvironment.
  scoped_refptr<TestVideoEncoderCallback> test_video_encoder_callback_;
  VideoSenderConfig video_config_;
  scoped_refptr<test::FakeSingleThreadTaskRunner> task_runner_;
  scoped_ptr<VideoEncoder> video_encoder_;
  scoped_refptr<media::VideoFrame> video_frame_;

  scoped_refptr<CastEnvironment> cast_environment_;

  DISALLOW_COPY_AND_ASSIGN(VideoEncoderImplTest);
};

TEST_F(VideoEncoderImplTest, EncodePattern30fpsRunningOutOfAck) {
  Configure(3);

  VideoEncoder::FrameEncodedCallback frame_encoded_callback =
      base::Bind(&TestVideoEncoderCallback::DeliverEncodedVideoFrame,
                 test_video_encoder_callback_.get());

  base::TimeTicks capture_time;
  capture_time += base::TimeDelta::FromMilliseconds(33);
  test_video_encoder_callback_->SetExpectedResult(0, 0, capture_time);
  EXPECT_TRUE(video_encoder_->EncodeVideoFrame(
      video_frame_, capture_time, frame_encoded_callback));
  task_runner_->RunTasks();

  capture_time += base::TimeDelta::FromMilliseconds(33);
  video_encoder_->LatestFrameIdToReference(0);
  test_video_encoder_callback_->SetExpectedResult(1, 0, capture_time);
  EXPECT_TRUE(video_encoder_->EncodeVideoFrame(
      video_frame_, capture_time, frame_encoded_callback));
  task_runner_->RunTasks();

  capture_time += base::TimeDelta::FromMilliseconds(33);
  video_encoder_->LatestFrameIdToReference(1);
  test_video_encoder_callback_->SetExpectedResult(2, 1, capture_time);
  EXPECT_TRUE(video_encoder_->EncodeVideoFrame(
      video_frame_, capture_time, frame_encoded_callback));
  task_runner_->RunTasks();

  video_encoder_->LatestFrameIdToReference(2);

  for (int i = 3; i < 6; ++i) {
    capture_time += base::TimeDelta::FromMilliseconds(33);
    test_video_encoder_callback_->SetExpectedResult(i, 2, capture_time);
    EXPECT_TRUE(video_encoder_->EncodeVideoFrame(
        video_frame_, capture_time, frame_encoded_callback));
    task_runner_->RunTasks();
  }
}

// TODO(pwestin): Re-enabled after redesign the encoder to control number of
// frames in flight.
TEST_F(VideoEncoderImplTest, DISABLED_EncodePattern60fpsRunningOutOfAck) {
  video_config_.max_number_of_video_buffers_used = 1;
  Configure(6);

  base::TimeTicks capture_time;
  VideoEncoder::FrameEncodedCallback frame_encoded_callback =
      base::Bind(&TestVideoEncoderCallback::DeliverEncodedVideoFrame,
                 test_video_encoder_callback_.get());

  capture_time += base::TimeDelta::FromMilliseconds(33);
  test_video_encoder_callback_->SetExpectedResult(0, 0, capture_time);
  EXPECT_TRUE(video_encoder_->EncodeVideoFrame(
      video_frame_, capture_time, frame_encoded_callback));
  task_runner_->RunTasks();

  video_encoder_->LatestFrameIdToReference(0);
  capture_time += base::TimeDelta::FromMilliseconds(33);
  test_video_encoder_callback_->SetExpectedResult(1, 0, capture_time);
  EXPECT_TRUE(video_encoder_->EncodeVideoFrame(
      video_frame_, capture_time, frame_encoded_callback));
  task_runner_->RunTasks();

  video_encoder_->LatestFrameIdToReference(1);
  capture_time += base::TimeDelta::FromMilliseconds(33);
  test_video_encoder_callback_->SetExpectedResult(2, 0, capture_time);
  EXPECT_TRUE(video_encoder_->EncodeVideoFrame(
      video_frame_, capture_time, frame_encoded_callback));
  task_runner_->RunTasks();

  video_encoder_->LatestFrameIdToReference(2);

  for (int i = 3; i < 9; ++i) {
    capture_time += base::TimeDelta::FromMilliseconds(33);
    test_video_encoder_callback_->SetExpectedResult(i, 2, capture_time);
    EXPECT_TRUE(video_encoder_->EncodeVideoFrame(
        video_frame_, capture_time, frame_encoded_callback));
    task_runner_->RunTasks();
  }
}

// TODO(pwestin): Re-enabled after redesign the encoder to control number of
// frames in flight.
TEST_F(VideoEncoderImplTest,
       DISABLED_EncodePattern60fps200msDelayRunningOutOfAck) {
  Configure(12);

  base::TimeTicks capture_time;
  VideoEncoder::FrameEncodedCallback frame_encoded_callback =
      base::Bind(&TestVideoEncoderCallback::DeliverEncodedVideoFrame,
                 test_video_encoder_callback_.get());

  capture_time += base::TimeDelta::FromMilliseconds(33);
  test_video_encoder_callback_->SetExpectedResult(0, 0, capture_time);
  EXPECT_TRUE(video_encoder_->EncodeVideoFrame(
      video_frame_, capture_time, frame_encoded_callback));
  task_runner_->RunTasks();

  video_encoder_->LatestFrameIdToReference(0);
  capture_time += base::TimeDelta::FromMilliseconds(33);
  test_video_encoder_callback_->SetExpectedResult(1, 0, capture_time);
  EXPECT_TRUE(video_encoder_->EncodeVideoFrame(
      video_frame_, capture_time, frame_encoded_callback));
  task_runner_->RunTasks();

  video_encoder_->LatestFrameIdToReference(1);
  capture_time += base::TimeDelta::FromMilliseconds(33);
  test_video_encoder_callback_->SetExpectedResult(2, 0, capture_time);
  EXPECT_TRUE(video_encoder_->EncodeVideoFrame(
      video_frame_, capture_time, frame_encoded_callback));
  task_runner_->RunTasks();

  video_encoder_->LatestFrameIdToReference(2);
  capture_time += base::TimeDelta::FromMilliseconds(33);
  test_video_encoder_callback_->SetExpectedResult(3, 0, capture_time);
  EXPECT_TRUE(video_encoder_->EncodeVideoFrame(
      video_frame_, capture_time, frame_encoded_callback));
  task_runner_->RunTasks();

  video_encoder_->LatestFrameIdToReference(3);
  capture_time += base::TimeDelta::FromMilliseconds(33);
  test_video_encoder_callback_->SetExpectedResult(4, 0, capture_time);
  EXPECT_TRUE(video_encoder_->EncodeVideoFrame(
      video_frame_, capture_time, frame_encoded_callback));
  task_runner_->RunTasks();

  video_encoder_->LatestFrameIdToReference(4);

  for (int i = 5; i < 17; ++i) {
    test_video_encoder_callback_->SetExpectedResult(i, 4, capture_time);
    EXPECT_TRUE(video_encoder_->EncodeVideoFrame(
        video_frame_, capture_time, frame_encoded_callback));
    task_runner_->RunTasks();
  }
}

}  // namespace cast
}  // namespace media