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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 "base/time/time.h"
#include "media/base/audio_converter.h"
#include "media/base/fake_audio_render_callback.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "testing/perf/perf_test.h"
namespace media {
static const int kBenchmarkIterations = 200000;
// InputCallback that zero's out the provided AudioBus.
class NullInputProvider : public AudioConverter::InputCallback {
public:
NullInputProvider() {}
~NullInputProvider() override {}
double ProvideInput(AudioBus* audio_bus,
base::TimeDelta buffer_delay) override {
audio_bus->Zero();
return 1;
}
};
void RunConvertBenchmark(const AudioParameters& in_params,
const AudioParameters& out_params,
bool fifo,
const std::string& trace_name) {
NullInputProvider fake_input1;
NullInputProvider fake_input2;
NullInputProvider fake_input3;
scoped_ptr<AudioBus> output_bus = AudioBus::Create(out_params);
AudioConverter converter(in_params, out_params, !fifo);
converter.AddInput(&fake_input1);
converter.AddInput(&fake_input2);
converter.AddInput(&fake_input3);
base::TimeTicks start = base::TimeTicks::HighResNow();
for (int i = 0; i < kBenchmarkIterations; ++i) {
converter.Convert(output_bus.get());
}
double runs_per_second = kBenchmarkIterations /
(base::TimeTicks::HighResNow() - start).InSecondsF();
perf_test::PrintResult(
"audio_converter", "", trace_name, runs_per_second, "runs/s", true);
}
TEST(AudioConverterPerfTest, ConvertBenchmark) {
// Create input and output parameters to convert between the two most common
// sets of parameters (as indicated via UMA data).
AudioParameters input_params(
AudioParameters::AUDIO_PCM_LINEAR, CHANNEL_LAYOUT_MONO, 48000, 16, 2048);
AudioParameters output_params(
AudioParameters::AUDIO_PCM_LINEAR, CHANNEL_LAYOUT_STEREO, 44100, 16, 440);
RunConvertBenchmark(input_params, output_params, false, "convert");
}
TEST(AudioConverterPerfTest, ConvertBenchmarkFIFO) {
// Create input and output parameters to convert between common buffer sizes
// without any resampling for the FIFO vs no FIFO benchmarks.
AudioParameters input_params(AudioParameters::AUDIO_PCM_LINEAR,
CHANNEL_LAYOUT_STEREO,
44100,
16,
2048);
AudioParameters output_params(
AudioParameters::AUDIO_PCM_LINEAR, CHANNEL_LAYOUT_STEREO, 44100, 16, 440);
RunConvertBenchmark(input_params, output_params, true, "convert_fifo_only");
RunConvertBenchmark(input_params, output_params, false,
"convert_pass_through");
}
} // namespace media
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