media/base/audio_bus_perftest.cc

   1 // Copyright 2013 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "base/time/time.h"
   6 #include "media/base/audio_bus.h"
   7 #include "media/base/fake_audio_render_callback.h"
   8 #include "testing/gtest/include/gtest/gtest.h"
   9 #include "testing/perf/perf_test.h"
  10
  11 namespace media {
  12
  13 static const int kBenchmarkIterations = 100;
  14
  15 template <typename T>
  16 void RunInterleaveBench(AudioBus* bus, const std::string& trace_name) {
  17   const int frame_size = bus->frames() * bus->channels();
  18   scoped_ptr<T> interleaved(new T[frame_size]);
  19   const int byte_size = sizeof(*interleaved);
  20
  21   base::TimeTicks start = base::TimeTicks::HighResNow();
  22   for (int i = 0; i < kBenchmarkIterations; ++i) {
  23     bus->ToInterleaved(bus->frames(), byte_size, interleaved.get());
  24   }
  25   double total_time_seconds =
  26       (base::TimeTicks::HighResNow() - start).InSecondsF();
  27   perf_test::PrintResult(
  28       "audio_bus_to_interleaved", "", trace_name,
  29       kBenchmarkIterations / total_time_seconds, "runs/s", true);
  30
  31   start = base::TimeTicks::HighResNow();
  32   for (int i = 0; i < kBenchmarkIterations; ++i) {
  33     bus->FromInterleaved(interleaved.get(), bus->frames(), byte_size);
  34   }
  35   total_time_seconds = (base::TimeTicks::HighResNow() - start).InSecondsF();
  36   perf_test::PrintResult(
  37       "audio_bus_from_interleaved", "", trace_name,
  38       kBenchmarkIterations / total_time_seconds, "runs/s", true);
  39 }
  40
  41 // Benchmark the FromInterleaved() and ToInterleaved() methods.
  42 TEST(AudioBusPerfTest, Interleave) {
  43   scoped_ptr<AudioBus> bus = AudioBus::Create(2, 48000 * 120);
  44   FakeAudioRenderCallback callback(0.2);
  45   callback.Render(bus.get(), 0);
  46
  47   RunInterleaveBench<int8>(bus.get(), "int8");
  48   RunInterleaveBench<int16>(bus.get(), "int16");
  49   RunInterleaveBench<int32>(bus.get(), "int32");
  50 }
  51
  52 } // namespace media