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// Copyright (c) 2012 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 "remoting/host/video_scheduler.h"
#include "base/bind.h"
#include "base/message_loop/message_loop.h"
#include "base/run_loop.h"
#include "remoting/base/auto_thread_task_runner.h"
#include "remoting/codec/video_encoder.h"
#include "remoting/proto/video.pb.h"
#include "remoting/protocol/protocol_mock_objects.h"
#include "testing/gmock/include/gmock/gmock.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "third_party/webrtc/modules/desktop_capture/desktop_frame.h"
#include "third_party/webrtc/modules/desktop_capture/screen_capturer_mock_objects.h"
using ::remoting::protocol::MockClientStub;
using ::remoting::protocol::MockVideoStub;
using ::testing::_;
using ::testing::AtLeast;
using ::testing::AnyNumber;
using ::testing::DeleteArg;
using ::testing::DoAll;
using ::testing::Expectation;
using ::testing::InSequence;
using ::testing::InvokeWithoutArgs;
using ::testing::Return;
using ::testing::ReturnRef;
using ::testing::SaveArg;
namespace remoting {
namespace {
ACTION(FinishEncode) {
scoped_ptr<VideoPacket> packet(new VideoPacket());
return packet.release();
}
ACTION(FinishSend) {
arg1.Run();
}
} // namespace
static const int kWidth = 640;
static const int kHeight = 480;
class MockVideoEncoder : public VideoEncoder {
public:
MockVideoEncoder();
virtual ~MockVideoEncoder();
scoped_ptr<VideoPacket> Encode(
const webrtc::DesktopFrame& frame) {
return scoped_ptr<VideoPacket>(EncodePtr(frame));
}
MOCK_METHOD1(EncodePtr, VideoPacket*(const webrtc::DesktopFrame& frame));
private:
DISALLOW_COPY_AND_ASSIGN(MockVideoEncoder);
};
MockVideoEncoder::MockVideoEncoder() {}
MockVideoEncoder::~MockVideoEncoder() {}
class VideoSchedulerTest : public testing::Test {
public:
VideoSchedulerTest();
virtual void SetUp() OVERRIDE;
void StartVideoScheduler(scoped_ptr<webrtc::ScreenCapturer> capturer);
void StopVideoScheduler();
// webrtc::ScreenCapturer mocks.
void OnCapturerStart(webrtc::ScreenCapturer::Callback* callback);
void OnCaptureFrame(const webrtc::DesktopRegion& region);
protected:
base::MessageLoop message_loop_;
base::RunLoop run_loop_;
scoped_refptr<AutoThreadTaskRunner> task_runner_;
scoped_refptr<VideoScheduler> scheduler_;
MockClientStub client_stub_;
MockVideoStub video_stub_;
// The following mock objects are owned by VideoScheduler.
MockVideoEncoder* encoder_;
scoped_ptr<webrtc::DesktopFrame> frame_;
// Points to the callback passed to webrtc::ScreenCapturer::Start().
webrtc::ScreenCapturer::Callback* capturer_callback_;
private:
DISALLOW_COPY_AND_ASSIGN(VideoSchedulerTest);
};
VideoSchedulerTest::VideoSchedulerTest()
: encoder_(NULL),
capturer_callback_(NULL) {
}
void VideoSchedulerTest::SetUp() {
task_runner_ = new AutoThreadTaskRunner(
message_loop_.message_loop_proxy(), run_loop_.QuitClosure());
encoder_ = new MockVideoEncoder();
}
void VideoSchedulerTest::StartVideoScheduler(
scoped_ptr<webrtc::ScreenCapturer> capturer) {
scheduler_ = new VideoScheduler(
task_runner_, // Capture
task_runner_, // Encode
task_runner_, // Network
capturer.Pass(),
scoped_ptr<VideoEncoder>(encoder_),
&client_stub_,
&video_stub_);
scheduler_->Start();
}
void VideoSchedulerTest::StopVideoScheduler() {
scheduler_->Stop();
scheduler_ = NULL;
}
void VideoSchedulerTest::OnCapturerStart(
webrtc::ScreenCapturer::Callback* callback) {
EXPECT_FALSE(capturer_callback_);
EXPECT_TRUE(callback);
capturer_callback_ = callback;
}
void VideoSchedulerTest::OnCaptureFrame(const webrtc::DesktopRegion& region) {
frame_->mutable_updated_region()->SetRect(
webrtc::DesktopRect::MakeXYWH(0, 0, 10, 10));
capturer_callback_->OnCaptureCompleted(frame_.release());
}
// This test mocks capturer, encoder and network layer to simulate one capture
// cycle. When the first encoded packet is submitted to the network
// VideoScheduler is instructed to come to a complete stop. We expect the stop
// sequence to be executed successfully.
TEST_F(VideoSchedulerTest, StartAndStop) {
scoped_ptr<webrtc::MockScreenCapturer> capturer(
new webrtc::MockScreenCapturer());
Expectation capturer_start =
EXPECT_CALL(*capturer, Start(_))
.WillOnce(Invoke(this, &VideoSchedulerTest::OnCapturerStart));
frame_.reset(new webrtc::BasicDesktopFrame(
webrtc::DesktopSize(kWidth, kHeight)));
// First the capturer is called.
Expectation capturer_capture = EXPECT_CALL(*capturer, Capture(_))
.After(capturer_start)
.WillRepeatedly(Invoke(this, &VideoSchedulerTest::OnCaptureFrame));
// Expect the encoder be called.
EXPECT_CALL(*encoder_, EncodePtr(_))
.WillRepeatedly(FinishEncode());
// By default delete the arguments when ProcessVideoPacket is received.
EXPECT_CALL(video_stub_, ProcessVideoPacketPtr(_, _))
.WillRepeatedly(FinishSend());
// For the first time when ProcessVideoPacket is received we stop the
// VideoScheduler.
EXPECT_CALL(video_stub_, ProcessVideoPacketPtr(_, _))
.WillOnce(DoAll(
FinishSend(),
InvokeWithoutArgs(this, &VideoSchedulerTest::StopVideoScheduler)))
.RetiresOnSaturation();
// Start video frame capture.
StartVideoScheduler(capturer.PassAs<webrtc::ScreenCapturer>());
task_runner_ = NULL;
run_loop_.Run();
}
} // namespace remoting
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