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/*
* Copyright (c) 2016 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 "modules/desktop_capture/screen_drawer.h"
#include <stdint.h>
#include <atomic>
#include <memory>
#include "api/function_view.h"
#include "rtc_base/checks.h"
#include "rtc_base/logging.h"
#include "rtc_base/platform_thread.h"
#include "rtc_base/random.h"
#include "rtc_base/time_utils.h"
#include "system_wrappers/include/sleep.h"
#include "test/gtest.h"
#if defined(WEBRTC_POSIX)
#include "modules/desktop_capture/screen_drawer_lock_posix.h"
#endif
namespace webrtc {
namespace {
void TestScreenDrawerLock(
rtc::FunctionView<std::unique_ptr<ScreenDrawerLock>()> ctor) {
constexpr int kLockDurationMs = 100;
std::atomic<bool> created(false);
std::atomic<bool> ready(false);
class Task {
public:
Task(std::atomic<bool>* created,
const std::atomic<bool>& ready,
rtc::FunctionView<std::unique_ptr<ScreenDrawerLock>()> ctor)
: created_(created), ready_(ready), ctor_(ctor) {}
~Task() = default;
void RunTask() {
std::unique_ptr<ScreenDrawerLock> lock = ctor_();
ASSERT_TRUE(!!lock);
created_->store(true);
// Wait for the main thread to get the signal of created_.
while (!ready_.load()) {
SleepMs(1);
}
// At this point, main thread should begin to create a second lock. Though
// it's still possible the second lock won't be created before the
// following sleep has been finished, the possibility will be
// significantly reduced.
const int64_t current_ms = rtc::TimeMillis();
// SleepMs() may return early. See
// https://cs.chromium.org/chromium/src/third_party/webrtc/system_wrappers/include/sleep.h?rcl=4a604c80cecce18aff6fc5e16296d04675312d83&l=20
// But we need to ensure at least 100 ms has been passed before unlocking
// `lock`.
while (rtc::TimeMillis() - current_ms < kLockDurationMs) {
SleepMs(kLockDurationMs - (rtc::TimeMillis() - current_ms));
}
}
private:
std::atomic<bool>* const created_;
const std::atomic<bool>& ready_;
const rtc::FunctionView<std::unique_ptr<ScreenDrawerLock>()> ctor_;
} task(&created, ready, ctor);
auto lock_thread = rtc::PlatformThread::SpawnJoinable(
[&task] { task.RunTask(); }, "lock_thread");
// Wait for the first lock in Task::RunTask() to be created.
// TODO(zijiehe): Find a better solution to wait for the creation of the first
// lock. See
// https://chromium-review.googlesource.com/c/607688/13/webrtc/modules/desktop_capture/screen_drawer_unittest.cc
while (!created.load()) {
SleepMs(1);
}
const int64_t start_ms = rtc::TimeMillis();
ready.store(true);
// This is unlikely to fail, but just in case current thread is too laggy and
// cause the SleepMs() in RunTask() to finish before we creating another lock.
ASSERT_GT(kLockDurationMs, rtc::TimeMillis() - start_ms);
ctor();
ASSERT_LE(kLockDurationMs, rtc::TimeMillis() - start_ms);
}
} // namespace
// These are a set of manual test cases, as we do not have an automatical way to
// detect whether a ScreenDrawer on a certain platform works well without
// ScreenCapturer(s). So you may execute these test cases with
// --gtest_also_run_disabled_tests --gtest_filter=ScreenDrawerTest.*.
TEST(ScreenDrawerTest, DISABLED_DrawRectangles) {
std::unique_ptr<ScreenDrawer> drawer = ScreenDrawer::Create();
if (!drawer) {
RTC_LOG(LS_WARNING)
<< "No ScreenDrawer implementation for current platform.";
return;
}
if (drawer->DrawableRegion().is_empty()) {
RTC_LOG(LS_WARNING)
<< "ScreenDrawer of current platform does not provide a "
"non-empty DrawableRegion().";
return;
}
DesktopRect rect = drawer->DrawableRegion();
Random random(rtc::TimeMicros());
for (int i = 0; i < 100; i++) {
// Make sure we at least draw one pixel.
int left = random.Rand(rect.left(), rect.right() - 2);
int top = random.Rand(rect.top(), rect.bottom() - 2);
drawer->DrawRectangle(
DesktopRect::MakeLTRB(left, top, random.Rand(left + 1, rect.right()),
random.Rand(top + 1, rect.bottom())),
RgbaColor(random.Rand<uint8_t>(), random.Rand<uint8_t>(),
random.Rand<uint8_t>(), random.Rand<uint8_t>()));
if (i == 50) {
SleepMs(10000);
}
}
SleepMs(10000);
}
#if defined(THREAD_SANITIZER) // bugs.webrtc.org/10019
#define MAYBE_TwoScreenDrawerLocks DISABLED_TwoScreenDrawerLocks
#else
#define MAYBE_TwoScreenDrawerLocks TwoScreenDrawerLocks
#endif
TEST(ScreenDrawerTest, MAYBE_TwoScreenDrawerLocks) {
#if defined(WEBRTC_POSIX)
// ScreenDrawerLockPosix won't be able to unlink the named semaphore. So use a
// different semaphore name here to avoid deadlock.
const char* semaphore_name = "GSDL8784541a812011e788ff67427b";
ScreenDrawerLockPosix::Unlink(semaphore_name);
TestScreenDrawerLock([semaphore_name]() {
return std::make_unique<ScreenDrawerLockPosix>(semaphore_name);
});
#elif defined(WEBRTC_WIN)
TestScreenDrawerLock([]() { return ScreenDrawerLock::Create(); });
#endif
}
} // namespace webrtc
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