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video_decode_accelerator_perf_tests.cc
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video_decode_accelerator_perf_tests.cc
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// Copyright 2019 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 <vector>
#include "base/command_line.h"
#include "base/strings/stringprintf.h"
#include "media/base/test_data_util.h"
#include "media/gpu/test/video_player/frame_renderer_dummy.h"
#include "media/gpu/test/video_player/video.h"
#include "media/gpu/test/video_player/video_collection.h"
#include "media/gpu/test/video_player/video_decoder_client.h"
#include "media/gpu/test/video_player/video_player.h"
#include "media/gpu/test/video_player/video_player_test_environment.h"
#include "mojo/core/embedder/embedder.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace media {
namespace test {
// Default output folder used to store performance metrics.
constexpr const base::FilePath::CharType* kDefaultOutputFolder =
FILE_PATH_LITERAL("perf_metrics");
// TODO(dstaessens@) Expand with more meaningful metrics.
struct PerformanceMetrics {
// Total measurement duration.
base::TimeDelta total_duration_;
// The number of frames decoded.
size_t frame_decoded_count_ = 0;
// The overall number of frames decoded per second.
double frames_per_second_ = 0.0;
// The average time it took to decode a frame.
double avg_frame_decode_time_ms_ = 0.0;
};
// The performance evaluator can be plugged into the video player to collect
// various performance metrics.
// TODO(dstaessens@) Check and post warning when CPU frequency scaling is
// enabled as this affects test results.
class PerformanceEvaluator : public VideoFrameProcessor {
public:
// Interface VideoFrameProcessor
void ProcessVideoFrame(scoped_refptr<const VideoFrame> video_frame,
size_t frame_index) override;
bool WaitUntilDone() override { return true; }
// Start/Stop collecting performance metrics.
void StartMeasuring();
void StopMeasuring();
// Write the collected performance metrics to file.
void WriteMetricsToFile() const;
private:
// Start/end time of the measurement period.
base::TimeTicks start_time_;
base::TimeTicks end_time_;
// Time at which the previous frame was decoded.
base::TimeTicks prev_frame_decoded_time_;
// List of all frame decode times.
std::vector<double> frame_decode_times_;
// Collection of various performance metrics.
PerformanceMetrics perf_metrics_;
};
void PerformanceEvaluator::ProcessVideoFrame(
scoped_refptr<const VideoFrame> video_frame,
size_t frame_index) {
base::TimeTicks now = base::TimeTicks::Now();
frame_decode_times_.push_back(
(now - prev_frame_decoded_time_).InMillisecondsF());
prev_frame_decoded_time_ = now;
perf_metrics_.frame_decoded_count_++;
}
void PerformanceEvaluator::StartMeasuring() {
start_time_ = base::TimeTicks::Now();
prev_frame_decoded_time_ = start_time_;
}
void PerformanceEvaluator::StopMeasuring() {
end_time_ = base::TimeTicks::Now();
perf_metrics_.total_duration_ = end_time_ - start_time_;
perf_metrics_.frames_per_second_ = perf_metrics_.frame_decoded_count_ /
perf_metrics_.total_duration_.InSecondsF();
perf_metrics_.avg_frame_decode_time_ms_ =
perf_metrics_.total_duration_.InMillisecondsF() /
perf_metrics_.frame_decoded_count_;
VLOG(0) << "Number of frames decoded: " << perf_metrics_.frame_decoded_count_;
VLOG(0) << "Total duration: "
<< perf_metrics_.total_duration_.InMillisecondsF() << "ms";
VLOG(0) << "FPS: " << perf_metrics_.frames_per_second_;
VLOG(0) << "Avg. frame decode time: "
<< perf_metrics_.avg_frame_decode_time_ms_ << "ms";
}
void PerformanceEvaluator::WriteMetricsToFile() const {
const ::testing::TestInfo* const test_info =
::testing::UnitTest::GetInstance()->current_test_info();
std::string str = base::StringPrintf(
"Number of frames decoded: %zu\nTotal duration: %fms\nFPS: %f\nAvg. "
"frame decode time: %fms\n",
perf_metrics_.frame_decoded_count_,
perf_metrics_.total_duration_.InMillisecondsF(),
perf_metrics_.frames_per_second_,
perf_metrics_.avg_frame_decode_time_ms_);
// Write performance metrics to file.
base::FilePath output_folder_path = base::FilePath(kDefaultOutputFolder);
if (!DirectoryExists(output_folder_path))
base::CreateDirectory(output_folder_path);
base::FilePath output_file_path = output_folder_path.Append(
base::FilePath(test_info->name()).AddExtension(".txt"));
base::File output_file(
base::FilePath(output_file_path),
base::File::FLAG_CREATE_ALWAYS | base::File::FLAG_WRITE);
output_file.WriteAtCurrentPos(str.data(), str.length());
VLOG(0) << "Wrote performance metrics to: " << output_file_path;
// Write frame decode times to file.
base::FilePath decode_times_file_path =
output_file_path.InsertBeforeExtension(".frame_times");
base::File decode_times_output_file(
base::FilePath(decode_times_file_path),
base::File::FLAG_CREATE_ALWAYS | base::File::FLAG_WRITE);
for (double frame_decoded_time : frame_decode_times_) {
std::string decode_time_str =
base::StringPrintf("%f\n", frame_decoded_time);
decode_times_output_file.WriteAtCurrentPos(decode_time_str.data(),
decode_time_str.length());
}
VLOG(0) << "Wrote frame decode times to: " << decode_times_file_path;
}
namespace {
media::test::VideoPlayerTestEnvironment* g_env;
// Video decode test class. Performs setup and teardown for each single test.
class VideoDecoderTest : public ::testing::Test {
public:
std::unique_ptr<VideoPlayer> CreateVideoPlayer(const Video* video) {
LOG_ASSERT(video);
std::vector<std::unique_ptr<VideoFrameProcessor>> frame_processors;
auto performance_evaluator = std::make_unique<PerformanceEvaluator>();
performance_evaluator_ = performance_evaluator.get();
frame_processors.push_back(std::move(performance_evaluator));
return VideoPlayer::Create(video, FrameRendererDummy::Create(),
std::move(frame_processors),
VideoDecoderClientConfig());
}
PerformanceEvaluator* performance_evaluator_;
};
} // namespace
// Play video from start to end while measuring performance.
// TODO(dstaessens@) Add a test to measure capped decode performance, measuring
// the number of frames dropped.
TEST_F(VideoDecoderTest, MeasureUncappedPerfomance) {
auto tvp = CreateVideoPlayer(g_env->video_);
performance_evaluator_->StartMeasuring();
tvp->Play();
EXPECT_TRUE(tvp->WaitForFlushDone());
performance_evaluator_->StopMeasuring();
performance_evaluator_->WriteMetricsToFile();
EXPECT_EQ(tvp->GetFlushDoneCount(), 1u);
EXPECT_EQ(tvp->GetFrameDecodedCount(), g_env->video_->NumFrames());
}
} // namespace test
} // namespace media
int main(int argc, char** argv) {
testing::InitGoogleTest(&argc, argv);
base::CommandLine::Init(argc, argv);
// Using shared memory requires mojo to be initialized (crbug.com/849207).
mojo::core::Init();
// Needed to enable DVLOG through --vmodule.
logging::LoggingSettings settings;
settings.logging_dest = logging::LOG_TO_SYSTEM_DEBUG_LOG;
LOG_ASSERT(logging::InitLogging(settings));
// Set the default test data path.
media::test::Video::SetTestDataPath(media::GetTestDataPath());
// Set up our test environment
media::test::g_env = static_cast<media::test::VideoPlayerTestEnvironment*>(
testing::AddGlobalTestEnvironment(
new media::test::VideoPlayerTestEnvironment(
&media::test::kDefaultTestVideoCollection[0])));
return RUN_ALL_TESTS();
}