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// Copyright 2015 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/protocol/video_frame_pump.h"
#include <utility>
#include "base/bind.h"
#include "base/macros.h"
#include "base/message_loop/message_loop.h"
#include "base/run_loop.h"
#include "base/single_thread_task_runner.h"
#include "remoting/base/auto_thread.h"
#include "remoting/base/auto_thread_task_runner.h"
#include "remoting/codec/video_encoder.h"
#include "remoting/codec/video_encoder_verbatim.h"
#include "remoting/proto/control.pb.h"
#include "remoting/proto/video.pb.h"
#include "remoting/protocol/fake_desktop_capturer.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 ::testing::_;
using ::testing::AtLeast;
using ::testing::DoAll;
using ::testing::Expectation;
using ::testing::InvokeWithoutArgs;
using ::testing::Return;
namespace remoting {
namespace protocol {
namespace {
ACTION(FinishSend) {
arg1.Run();
}
scoped_ptr<webrtc::DesktopFrame> CreateNullFrame(
webrtc::SharedMemoryFactory* shared_memory_factory) {
return nullptr;
}
scoped_ptr<webrtc::DesktopFrame> CreateUnchangedFrame(
webrtc::SharedMemoryFactory* shared_memory_factory) {
const webrtc::DesktopSize kSize(800, 640);
// updated_region() is already empty by default in new BasicDesktopFrames.
return make_scoped_ptr(new webrtc::BasicDesktopFrame(kSize));
}
class MockVideoEncoder : public VideoEncoder {
public:
MockVideoEncoder() {}
~MockVideoEncoder() {}
MOCK_METHOD1(SetLosslessEncode, void(bool));
MOCK_METHOD1(SetLosslessColor, void(bool));
MOCK_METHOD1(EncodePtr, VideoPacket*(const webrtc::DesktopFrame&));
scoped_ptr<VideoPacket> Encode(const webrtc::DesktopFrame& frame) {
return make_scoped_ptr(EncodePtr(frame));
}
};
} // namespace
static const int kWidth = 640;
static const int kHeight = 480;
class ThreadCheckVideoEncoder : public VideoEncoderVerbatim {
public:
ThreadCheckVideoEncoder(
scoped_refptr<base::SingleThreadTaskRunner> task_runner)
: task_runner_(task_runner) {
}
~ThreadCheckVideoEncoder() override {
EXPECT_TRUE(task_runner_->BelongsToCurrentThread());
}
scoped_ptr<VideoPacket> Encode(const webrtc::DesktopFrame& frame) override {
return make_scoped_ptr(new VideoPacket());
}
private:
scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
DISALLOW_COPY_AND_ASSIGN(ThreadCheckVideoEncoder);
};
class ThreadCheckDesktopCapturer : public webrtc::DesktopCapturer {
public:
ThreadCheckDesktopCapturer(
scoped_refptr<base::SingleThreadTaskRunner> task_runner)
: task_runner_(task_runner), callback_(nullptr) {}
~ThreadCheckDesktopCapturer() override {
EXPECT_TRUE(task_runner_->BelongsToCurrentThread());
}
void Start(Callback* callback) override {
EXPECT_TRUE(task_runner_->BelongsToCurrentThread());
EXPECT_FALSE(callback_);
EXPECT_TRUE(callback);
callback_ = callback;
}
void Capture(const webrtc::DesktopRegion& rect) override {
EXPECT_TRUE(task_runner_->BelongsToCurrentThread());
scoped_ptr<webrtc::DesktopFrame> frame(
new webrtc::BasicDesktopFrame(webrtc::DesktopSize(kWidth, kHeight)));
frame->mutable_updated_region()->SetRect(
webrtc::DesktopRect::MakeXYWH(0, 0, 10, 10));
callback_->OnCaptureCompleted(frame.release());
}
private:
scoped_refptr<base::SingleThreadTaskRunner> task_runner_;
webrtc::DesktopCapturer::Callback* callback_;
DISALLOW_COPY_AND_ASSIGN(ThreadCheckDesktopCapturer);
};
class VideoFramePumpTest : public testing::Test {
public:
void SetUp() override;
void TearDown() override;
void StartVideoFramePump(
scoped_ptr<webrtc::DesktopCapturer> capturer,
scoped_ptr<VideoEncoder> encoder);
protected:
base::MessageLoop message_loop_;
base::RunLoop run_loop_;
scoped_refptr<AutoThreadTaskRunner> encode_task_runner_;
scoped_refptr<AutoThreadTaskRunner> main_task_runner_;
scoped_ptr<VideoFramePump> pump_;
MockVideoStub video_stub_;
};
void VideoFramePumpTest::SetUp() {
main_task_runner_ = new AutoThreadTaskRunner(
message_loop_.task_runner(), run_loop_.QuitClosure());
encode_task_runner_ = AutoThread::Create("encode", main_task_runner_);
}
void VideoFramePumpTest::TearDown() {
pump_.reset();
// Release the task runners, so that the test can quit.
encode_task_runner_ = nullptr;
main_task_runner_ = nullptr;
// Run the MessageLoop until everything has torn down.
run_loop_.Run();
}
// This test mocks capturer, encoder and network layer to simulate one capture
// cycle.
TEST_F(VideoFramePumpTest, StartAndStop) {
scoped_ptr<ThreadCheckDesktopCapturer> capturer(
new ThreadCheckDesktopCapturer(main_task_runner_));
scoped_ptr<ThreadCheckVideoEncoder> encoder(
new ThreadCheckVideoEncoder(encode_task_runner_));
base::RunLoop run_loop;
// When the first ProcessVideoPacket is received we stop the VideoFramePump.
EXPECT_CALL(video_stub_, ProcessVideoPacketPtr(_, _))
.WillOnce(DoAll(FinishSend(),
InvokeWithoutArgs(&run_loop, &base::RunLoop::Quit)))
.RetiresOnSaturation();
// Start video frame capture.
pump_.reset(new VideoFramePump(encode_task_runner_, std::move(capturer),
std::move(encoder), &video_stub_));
// Run MessageLoop until the first frame is received.
run_loop.Run();
}
// Tests that the pump handles null frames returned by the capturer.
TEST_F(VideoFramePumpTest, NullFrame) {
scoped_ptr<FakeDesktopCapturer> capturer(new FakeDesktopCapturer);
scoped_ptr<MockVideoEncoder> encoder(new MockVideoEncoder);
base::RunLoop run_loop;
// Set up the capturer to return null frames.
capturer->set_frame_generator(base::Bind(&CreateNullFrame));
// Expect that the VideoEncoder::Encode() method is never called.
EXPECT_CALL(*encoder, EncodePtr(_)).Times(0);
// When the first ProcessVideoPacket is received we stop the VideoFramePump.
EXPECT_CALL(video_stub_, ProcessVideoPacketPtr(_, _))
.WillOnce(DoAll(FinishSend(),
InvokeWithoutArgs(&run_loop, &base::RunLoop::Quit)))
.RetiresOnSaturation();
// Start video frame capture.
pump_.reset(new VideoFramePump(encode_task_runner_, std::move(capturer),
std::move(encoder), &video_stub_));
// Run MessageLoop until the first frame is received..
run_loop.Run();
}
// Tests how the pump handles unchanged frames returned by the capturer.
TEST_F(VideoFramePumpTest, UnchangedFrame) {
scoped_ptr<FakeDesktopCapturer> capturer(new FakeDesktopCapturer);
scoped_ptr<MockVideoEncoder> encoder(new MockVideoEncoder);
base::RunLoop run_loop;
// Set up the capturer to return unchanged frames.
capturer->set_frame_generator(base::Bind(&CreateUnchangedFrame));
// Expect that the VideoEncoder::Encode() method is called.
EXPECT_CALL(*encoder, EncodePtr(_)).WillRepeatedly(Return(nullptr));
// When the first ProcessVideoPacket is received we stop the VideoFramePump.
// TODO(wez): Verify that the generated packet has no content here.
EXPECT_CALL(video_stub_, ProcessVideoPacketPtr(_, _))
.WillOnce(DoAll(FinishSend(),
InvokeWithoutArgs(&run_loop, &base::RunLoop::Quit)))
.RetiresOnSaturation();
// Start video frame capture.
pump_.reset(new VideoFramePump(encode_task_runner_, std::move(capturer),
std::move(encoder), &video_stub_));
// Run MessageLoop until the first frame is received.
run_loop.Run();
}
} // namespace protocol
} // namespace remoting
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