components/copresence/test/audio_test_support.cc

   1 // Copyright 2014 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/copresence/test/audio_test_support.h"
   6
   7 #include <cstdlib>
   8
   9 #include "media/base/audio_bus.h"
  10
  11 namespace copresence {
  12
  13 void PopulateSamples(int random_seed, size_t size, float* samples) {
  14   srand(random_seed);
  15   for (size_t i = 0; i < size; ++i)
  16     samples[i] = (2.0 * rand() / RAND_MAX) - 1;
  17 }
  18
  19 scoped_ptr<media::AudioBus> CreateRandomAudio(int random_seed,
  20                                               int channels,
  21                                               int samples) {
  22   scoped_ptr<media::AudioBus> bus = media::AudioBus::Create(channels, samples);
  23   for (int ch = 0; ch < channels; ++ch)
  24     PopulateSamples(random_seed, samples, bus->channel(ch));
  25   return bus.Pass();
  26 }
  27
  28 scoped_refptr<media::AudioBusRefCounted>
  29 CreateRandomAudioRefCounted(int random_seed, int channels, int samples) {
  30   scoped_refptr<media::AudioBusRefCounted> bus =
  31       media::AudioBusRefCounted::Create(channels, samples);
  32   for (int ch = 0; ch < channels; ++ch)
  33     PopulateSamples(random_seed, samples, bus->channel(ch));
  34   return bus;
  35 }
  36
  37 }  // namespace copresence