Home | History | Annotate | Download | only in base 
      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::HighResNow();
     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::HighResNow() - 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
     73