components/audio_modem/test/random_samples.cc

   1 // Copyright 2015 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 "components/audio_modem/test/random_samples.h"
   6
   7 #include <cstdlib>
   8
   9 #include "media/base/audio_bus.h"
  10
  11 namespace audio_modem {
  12
  13 void PopulateSamples(unsigned int random_seed, size_t size, float* samples) {
  14 // On Windows, rand() is threadsafe, and rand_r() is not available.
  15 #if defined(OS_WIN)
  16   srand(random_seed);
  17   for (size_t i = 0; i < size; ++i)
  18     samples[i] = (2.0 * rand() / RAND_MAX) - 1;  // NOLINT
  19 #else
  20   for (size_t i = 0; i < size; ++i)
  21     samples[i] = (2.0 * rand_r(&random_seed) / RAND_MAX) - 1;
  22 #endif
  23 }
  24
  25 scoped_refptr<media::AudioBusRefCounted>
  26 CreateRandomAudioRefCounted(int random_seed, int channels, int samples) {
  27   scoped_refptr<media::AudioBusRefCounted> bus =
  28       media::AudioBusRefCounted::Create(channels, samples);
  29   for (int ch = 0; ch < channels; ++ch)
  30     PopulateSamples(random_seed, samples, bus->channel(ch));
  31   return bus;
  32 }
  33
  34 }  // namespace audio_modem