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// Copyright 2013 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 <stdint.h>
#include <memory>
#include "base/time/time.h"
#include "media/base/audio_bus.h"
#include "media/base/audio_sample_types.h"
#include "media/base/fake_audio_render_callback.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "testing/perf/perf_result_reporter.h"
namespace {
perf_test::PerfResultReporter SetUpReporter(const std::string& story_name) {
perf_test::PerfResultReporter reporter("audio_bus", story_name);
reporter.RegisterImportantMetric("_to_interleaved", "ms");
reporter.RegisterImportantMetric("_from_interleaved", "ms");
reporter.RegisterImportantMetric("_copy", "ms");
return reporter;
}
} // namespace
namespace media {
static const int kBenchmarkIterations = 20;
static const int kSampleRate = 48000;
template <typename T, class SampleTraits>
void RunInterleaveBench(AudioBus* bus,
const std::string& trace_name,
bool to_interleaved_only = false) {
const int frame_size = bus->frames() * bus->channels();
std::unique_ptr<T[]> interleaved(new T[frame_size]);
perf_test::PerfResultReporter reporter = SetUpReporter(trace_name);
base::TimeTicks start = base::TimeTicks::Now();
for (int i = 0; i < kBenchmarkIterations; ++i)
bus->ToInterleaved<SampleTraits>(bus->frames(), interleaved.get());
double total_time_milliseconds =
(base::TimeTicks::Now() - start).InMillisecondsF();
reporter.AddResult("_to_interleaved",
total_time_milliseconds / kBenchmarkIterations);
if (to_interleaved_only)
return;
start = base::TimeTicks::Now();
for (int i = 0; i < kBenchmarkIterations; ++i)
bus->FromInterleaved<SampleTraits>(interleaved.get(), bus->frames());
total_time_milliseconds = (base::TimeTicks::Now() - start).InMillisecondsF();
reporter.AddResult("_from_interleaved",
total_time_milliseconds / kBenchmarkIterations);
}
// Benchmark the FromInterleaved() and ToInterleaved() methods.
TEST(AudioBusPerfTest, Interleave) {
std::unique_ptr<AudioBus> bus = AudioBus::Create(2, kSampleRate * 120);
FakeAudioRenderCallback callback(0.2, kSampleRate);
callback.Render(base::TimeDelta(), base::TimeTicks::Now(), 0, bus.get());
// Only benchmark these two types since they're the only commonly used ones.
RunInterleaveBench<int16_t, SignedInt16SampleTypeTraits>(bus.get(),
"int16_t");
RunInterleaveBench<float, Float32SampleTypeTraits>(bus.get(), "float");
}
TEST(AudioBusPerfTest, DISABLED_ToInterleavedFloat) {
std::unique_ptr<AudioBus> bus = AudioBus::Create(2, kSampleRate * 120);
FakeAudioRenderCallback callback(0.2, kSampleRate);
callback.Render(base::TimeDelta(), base::TimeTicks::Now(), 0, bus.get());
RunInterleaveBench<float, Float32SampleTypeTraits>(
bus.get(), "to_interleave_float", true);
RunInterleaveBench<float, Float32SampleTypeTraitsNoClip>(
bus.get(), "to_interleave_float_no_clip", true);
}
void RunCopyBench(void (AudioBus::*f)(AudioBus*) const,
const std::string& trace_name) {
// Setup.
std::unique_ptr<AudioBus> bus = AudioBus::Create(2, kSampleRate * 120);
std::unique_ptr<AudioBus> dest = AudioBus::Create(2, kSampleRate * 120);
FakeAudioRenderCallback callback(0.2, kSampleRate);
callback.Render(base::TimeDelta(), base::TimeTicks::Now(), 0, bus.get());
// Warmup.
for (int i = 0; i < kBenchmarkIterations; ++i)
(bus.get()->*f)(dest.get());
// Benchmark.
auto start = base::TimeTicks::Now();
for (int i = 0; i < kBenchmarkIterations; ++i)
(bus.get()->*f)(dest.get());
auto total_time_milliseconds =
(base::TimeTicks::Now() - start).InMillisecondsF();
perf_test::PerfResultReporter reporter = SetUpReporter(trace_name);
reporter.AddResult("_copy", total_time_milliseconds / kBenchmarkIterations);
}
TEST(AudioBusPerfTest, DISABLED_CopyBench) {
RunCopyBench(&AudioBus::CopyTo, "no_clip");
RunCopyBench(&AudioBus::CopyAndClipTo, "clip");
}
} // namespace media
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