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// Copyright 2017 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 "media/gpu/android/promotion_hint_aggregator_impl.h"
#include <stdint.h>
#include <memory>
#include "base/bind.h"
#include "base/logging.h"
#include "base/memory/ptr_util.h"
#include "base/test/simple_test_tick_clock.h"
#include "testing/gtest/include/gtest/gtest.h"
using base::TimeDelta;
namespace {
// Default elapsed time between frames.
constexpr TimeDelta FrameTime = TimeDelta::FromMilliseconds(10);
} // namespace
namespace media {
// Unit tests for PromotionHintAggregatorImplTest
class PromotionHintAggregatorImplTest : public testing::Test {
public:
~PromotionHintAggregatorImplTest() override {}
void SetUp() override {
// Advance the clock so that time 0 isn't recent.
tick_clock_.Advance(TimeDelta::FromSeconds(10000));
impl_ = base::MakeUnique<PromotionHintAggregatorImpl>(&tick_clock_);
}
void TearDown() override {}
// Sends a new frame that's |is_promotable| or not, with |elapsed| since the
// previous frame. Returns whether the video is promotable.
bool SendFrame(bool is_promotable, TimeDelta elapsed = FrameTime) {
tick_clock_.Advance(elapsed);
PromotionHintAggregator::Hint hint;
hint.is_promotable = is_promotable;
impl_->NotifyPromotionHint(hint);
return impl_->IsSafeToPromote();
}
base::SimpleTestTickClock tick_clock_;
std::unique_ptr<PromotionHintAggregatorImpl> impl_;
};
TEST_F(PromotionHintAggregatorImplTest, InitiallyNotPromotable) {
// A new aggregator shouldn't promote.
ASSERT_FALSE(impl_->IsSafeToPromote());
}
TEST_F(PromotionHintAggregatorImplTest, SomePromotableFramesArePromotable) {
// We should have to send 10 frames before promoting.
for (int i = 0; i < 9; i++)
ASSERT_FALSE(SendFrame(true));
ASSERT_TRUE(SendFrame(true));
// Waiting a while should't cause un-promotion.
ASSERT_TRUE(SendFrame(true, TimeDelta::FromMilliseconds(10000)));
ASSERT_TRUE(SendFrame(true, TimeDelta::FromMilliseconds(10000)));
}
TEST_F(PromotionHintAggregatorImplTest, UnpromotableFramesDelayPromotion) {
// Start with an unpromotable frame.
ASSERT_FALSE(SendFrame(false));
base::TimeTicks start = tick_clock_.NowTicks();
// Send more until the minimum time has elapsed. Note that this will also be
// at least enough promotable frames in a row.
while (tick_clock_.NowTicks() - start + FrameTime < TimeDelta::FromSeconds(2))
ASSERT_FALSE(SendFrame(true));
// The next frame should do it.
ASSERT_TRUE(SendFrame(true));
}
TEST_F(PromotionHintAggregatorImplTest, PromotableFramesMustBeFastEnough) {
// Send some promotable frames, but not enough to promote.
for (int i = 0; i < 8; i++)
ASSERT_FALSE(SendFrame(true));
// Time passes.
tick_clock_.Advance(TimeDelta::FromMilliseconds(500));
// We should now start over.
for (int i = 0; i < 9; i++)
ASSERT_FALSE(SendFrame(true));
ASSERT_TRUE(SendFrame(true));
}
} // namespace media
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