1 files changed, 53 insertions, 0 deletions
diff --git a/chromium/media/base/audio_bus_perftest.cc b/chromium/media/base/audio_bus_perftest.cc
new file mode 100644
index 00000000000..ae60531074e
--- /dev/null
+++ b/chromium/media/base/audio_bus_perftest.cc
@@ -0,0 +1,53 @@
+// 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_bus.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 = 20;
+
+template <typename T>
+void RunInterleaveBench(AudioBus* bus, const std::string& trace_name) {
+  const int frame_size = bus->frames() * bus->channels();
+  scoped_ptr<T> interleaved(new T[frame_size]);
+  const int byte_size = sizeof(*interleaved);
+
+  base::TimeTicks start = base::TimeTicks::HighResNow();
+  for (int i = 0; i < kBenchmarkIterations; ++i) {
+    bus->ToInterleaved(bus->frames(), byte_size, interleaved.get());
+  }
+  double total_time_milliseconds =
+      (base::TimeTicks::HighResNow() - start).InMillisecondsF();
+  perf_test::PrintResult(
+      "audio_bus_to_interleaved", "", trace_name,
+      total_time_milliseconds / kBenchmarkIterations, "ms", true);
+
+  start = base::TimeTicks::HighResNow();
+  for (int i = 0; i < kBenchmarkIterations; ++i) {
+    bus->FromInterleaved(interleaved.get(), bus->frames(), byte_size);
+  }
+  total_time_milliseconds =
+      (base::TimeTicks::HighResNow() - start).InMillisecondsF();
+  perf_test::PrintResult(
+      "audio_bus_from_interleaved", "", trace_name,
+      total_time_milliseconds / kBenchmarkIterations, "ms", true);
+}
+
+// Benchmark the FromInterleaved() and ToInterleaved() methods.
+TEST(AudioBusPerfTest, Interleave) {
+  scoped_ptr<AudioBus> bus = AudioBus::Create(2, 48000 * 120);
+  FakeAudioRenderCallback callback(0.2);
+  callback.Render(bus.get(), 0);
+
+  RunInterleaveBench<int8>(bus.get(), "int8");
+  RunInterleaveBench<int16>(bus.get(), "int16");
+  RunInterleaveBench<int32>(bus.get(), "int32");
+}
+
+} // namespace media