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 = 20;
  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(T);
  20
  21   base::TimeTicks start = base::TimeTicks::Now();
  22   for (int i = 0; i < kBenchmarkIterations; ++i) {
  23     bus->ToInterleaved(bus->frames(), byte_size, interleaved.get());
  24   }
  25   double total_time_milliseconds =
  26       (base::TimeTicks::Now() - start).InMillisecondsF();
  27   perf_test::PrintResult(
  28       "audio_bus_to_interleaved", "", trace_name,
  29       total_time_milliseconds / kBenchmarkIterations, "ms", true);
  30
  31   start = base::TimeTicks::Now();
  32   for (int i = 0; i < kBenchmarkIterations; ++i) {
  33     bus->FromInterleaved(interleaved.get(), bus->frames(), byte_size);
  34   }
  35   total_time_milliseconds =
  36       (base::TimeTicks::Now() - start).InMillisecondsF();
  37   perf_test::PrintResult(
  38       "audio_bus_from_interleaved", "", trace_name,
  39       total_time_milliseconds / kBenchmarkIterations, "ms", true);
  40 }
  41
  42 // Benchmark the FromInterleaved() and ToInterleaved() methods.
  43 TEST(AudioBusPerfTest, Interleave) {
  44   scoped_ptr<AudioBus> bus = AudioBus::Create(2, 48000 * 120);
  45   FakeAudioRenderCallback callback(0.2);
  46   callback.Render(bus.get(), 0);
  47
  48   RunInterleaveBench<int8>(bus.get(), "int8");
  49   RunInterleaveBench<int16>(bus.get(), "int16");
  50   RunInterleaveBench<int32>(bus.get(), "int32");
  51 }
  52
  53 } // namespace media