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// Copyright 2016 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include <memory>
#include "remoting/protocol/webrtc_frame_scheduler.h"
#include "base/functional/bind.h"
#include "base/test/task_environment.h"
#include "remoting/base/session_options.h"
#include "remoting/protocol/frame_stats.h"
#include "remoting/protocol/webrtc_frame_scheduler_constant_rate.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "third_party/webrtc/modules/desktop_capture/desktop_frame.h"
using webrtc::BasicDesktopFrame;
using webrtc::DesktopRect;
using webrtc::DesktopSize;
namespace remoting::protocol {
class WebrtcFrameSchedulerTest : public ::testing::Test {
public:
WebrtcFrameSchedulerTest() = default;
~WebrtcFrameSchedulerTest() override = default;
void InitConstantRateScheduler() {
scheduler_ = std::make_unique<WebrtcFrameSchedulerConstantRate>();
scheduler_->SetPostTaskAdjustmentForTest(base::Milliseconds(0));
scheduler_->Start(base::BindRepeating(
&WebrtcFrameSchedulerTest::CaptureCallback, base::Unretained(this)));
}
void CaptureCallback() {
capture_callback_count_++;
if (simulate_capture_) {
scheduler_->OnFrameCaptured(&frame_);
}
}
protected:
base::test::TaskEnvironment task_environment_{
base::test::TaskEnvironment::TimeSource::MOCK_TIME};
std::unique_ptr<WebrtcFrameSchedulerConstantRate> scheduler_;
int capture_callback_count_ = 0;
bool simulate_capture_ = true;
BasicDesktopFrame frame_{DesktopSize(1, 1)};
};
TEST_F(WebrtcFrameSchedulerTest, NoCapturesIfZeroFps) {
InitConstantRateScheduler();
scheduler_->SetMaxFramerateFps(0);
task_environment_.FastForwardBy(base::Seconds(1));
EXPECT_EQ(0, capture_callback_count_);
}
TEST_F(WebrtcFrameSchedulerTest, CapturesAtRequestedFramerate) {
InitConstantRateScheduler();
scheduler_->SetMaxFramerateFps(60);
task_environment_.FastForwardBy(base::Seconds(1));
// There should be approximately 60 captures in 1 second, making an allowance
// for any off-by-one artifacts in timing.
EXPECT_LE(59, capture_callback_count_);
EXPECT_LE(capture_callback_count_, 61);
}
TEST_F(WebrtcFrameSchedulerTest, PostTaskAdjustmentApplied) {
InitConstantRateScheduler();
scheduler_->SetPostTaskAdjustmentForTest(base::Milliseconds(3));
scheduler_->SetMaxFramerateFps(30);
task_environment_.FastForwardBy(base::Seconds(1));
// There should be approximately ~33 captures in 1 second, making an allowance
// for any off-by-one artifacts in timing.
EXPECT_GE(capture_callback_count_, 32);
EXPECT_LE(capture_callback_count_, 34);
}
TEST_F(WebrtcFrameSchedulerTest, NoCaptureWhileCapturePending) {
InitConstantRateScheduler();
simulate_capture_ = false;
scheduler_->SetMaxFramerateFps(60);
task_environment_.FastForwardBy(base::Seconds(1));
// Only 1 capture callback, because the fake "capturer" never returns a
// captured frame. The scheduler should only do 1 capture at a time.
EXPECT_EQ(1, capture_callback_count_);
}
TEST_F(WebrtcFrameSchedulerTest, NoCaptureWhilePaused) {
InitConstantRateScheduler();
scheduler_->SetMaxFramerateFps(60);
scheduler_->Pause(true);
task_environment_.FastForwardBy(base::Seconds(1));
EXPECT_EQ(0, capture_callback_count_);
scheduler_->Pause(false);
task_environment_.FastForwardBy(base::Seconds(1));
EXPECT_LE(1, capture_callback_count_);
}
} // namespace remoting::protocol
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