media/base/sinc_resampler_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/bind.h"
   6 #include "base/bind_helpers.h"
   7 #include "base/time/time.h"
   8 #include "media/base/sinc_resampler.h"
   9 #include "testing/gmock/include/gmock/gmock.h"
  10 #include "testing/gtest/include/gtest/gtest.h"
  11 #include "testing/perf/perf_test.h"
  12
  13 namespace media {
  14
  15 static const int kBenchmarkIterations = 50000000;
  16
  17 static const double kSampleRateRatio = 192000.0 / 44100.0;
  18 static const double kKernelInterpolationFactor = 0.5;
  19
  20 // Helper function to provide no input to SincResampler's Convolve benchmark.
  21 static void DoNothing(int frames, float* destination) {}
  22
  23 // Define platform independent function name for Convolve* tests.
  24 #if defined(ARCH_CPU_X86_FAMILY)
  25 #define CONVOLVE_FUNC Convolve_SSE
  26 #elif defined(ARCH_CPU_ARM_FAMILY) && defined(USE_NEON)
  27 #define CONVOLVE_FUNC Convolve_NEON
  28 #endif
  29
  30 static void RunConvolveBenchmark(
  31     SincResampler* resampler,
  32     float (*convolve_fn)(const float*, const float*, const float*, double),
  33     bool aligned,
  34     const std::string& trace_name) {
  35   base::TimeTicks start = base::TimeTicks::Now();
  36   for (int i = 0; i < kBenchmarkIterations; ++i) {
  37     convolve_fn(resampler->get_kernel_for_testing() + (aligned ? 0 : 1),
  38                 resampler->get_kernel_for_testing(),
  39                 resampler->get_kernel_for_testing(),
  40                 kKernelInterpolationFactor);
  41   }
  42   double total_time_milliseconds =
  43       (base::TimeTicks::Now() - start).InMillisecondsF();
  44   perf_test::PrintResult("sinc_resampler_convolve",
  45                          "",
  46                          trace_name,
  47                          kBenchmarkIterations / total_time_milliseconds,
  48                          "runs/ms",
  49                          true);
  50 }
  51
  52 // Benchmark for the various Convolve() methods.  Make sure to build with
  53 // branding=Chrome so that DCHECKs are compiled out when benchmarking.
  54 TEST(SincResamplerPerfTest, Convolve) {
  55   SincResampler resampler(kSampleRateRatio,
  56                           SincResampler::kDefaultRequestSize,
  57                           base::Bind(&DoNothing));
  58
  59   RunConvolveBenchmark(
  60       &resampler, SincResampler::Convolve_C, true, "unoptimized_aligned");
  61
  62 #if defined(CONVOLVE_FUNC)
  63   RunConvolveBenchmark(
  64       &resampler, SincResampler::CONVOLVE_FUNC, true, "optimized_aligned");
  65   RunConvolveBenchmark(
  66       &resampler, SincResampler::CONVOLVE_FUNC, false, "optimized_unaligned");
  67 #endif
  68 }
  69
  70 #undef CONVOLVE_FUNC
  71
  72 } // namespace media