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1 // Copyright 2014 The Chromium Authors. All rights reserved. | 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 | 2 // Use of this source code is governed by a BSD-style license that can be |
3 // found in the LICENSE file. | 3 // found in the LICENSE file. |
4 | 4 |
5 #include <cmath> | 5 #include <cmath> |
6 | 6 |
7 #include "base/logging.h" | 7 #include "base/logging.h" |
8 #include "base/time/time.h" | 8 #include "base/time/time.h" |
9 #include "media/base/audio_bus.h" | 9 #include "media/base/audio_bus.h" |
10 #include "media/cast/test/utility/audio_utility.h" | 10 #include "media/cast/test/utility/audio_utility.h" |
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23 volume_(volume), | 23 volume_(volume), |
24 source_(num_channels, sine_wave_frequency, sample_rate) { | 24 source_(num_channels, sine_wave_frequency, sample_rate) { |
25 CHECK_LT(0, num_channels); | 25 CHECK_LT(0, num_channels); |
26 CHECK_LT(0, sample_rate); | 26 CHECK_LT(0, sample_rate); |
27 CHECK_LE(0.0f, volume_); | 27 CHECK_LE(0.0f, volume_); |
28 CHECK_LE(volume_, 1.0f); | 28 CHECK_LE(volume_, 1.0f); |
29 } | 29 } |
30 | 30 |
31 TestAudioBusFactory::~TestAudioBusFactory() {} | 31 TestAudioBusFactory::~TestAudioBusFactory() {} |
32 | 32 |
33 scoped_ptr<AudioBus> TestAudioBusFactory::NextAudioBus( | 33 std::unique_ptr<AudioBus> TestAudioBusFactory::NextAudioBus( |
34 const base::TimeDelta& duration) { | 34 const base::TimeDelta& duration) { |
35 const int num_samples = static_cast<int>((sample_rate_ * duration) / | 35 const int num_samples = static_cast<int>((sample_rate_ * duration) / |
36 base::TimeDelta::FromSeconds(1)); | 36 base::TimeDelta::FromSeconds(1)); |
37 scoped_ptr<AudioBus> bus(AudioBus::Create(num_channels_, num_samples)); | 37 std::unique_ptr<AudioBus> bus(AudioBus::Create(num_channels_, num_samples)); |
38 source_.OnMoreData(bus.get(), 0, 0); | 38 source_.OnMoreData(bus.get(), 0, 0); |
39 bus->Scale(volume_); | 39 bus->Scale(volume_); |
40 return bus; | 40 return bus; |
41 } | 41 } |
42 | 42 |
43 int CountZeroCrossings(const float* samples, int length) { | 43 int CountZeroCrossings(const float* samples, int length) { |
44 // The sample values must pass beyond |kAmplitudeThreshold| on the opposite | 44 // The sample values must pass beyond |kAmplitudeThreshold| on the opposite |
45 // side of zero before a crossing will be counted. | 45 // side of zero before a crossing will be counted. |
46 const float kAmplitudeThreshold = 0.03f; // 3% of max amplitude. | 46 const float kAmplitudeThreshold = 0.03f; // 3% of max amplitude. |
47 | 47 |
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179 } | 179 } |
180 *timestamp = gray_coded; | 180 *timestamp = gray_coded; |
181 return true; | 181 return true; |
182 } | 182 } |
183 } | 183 } |
184 return false; | 184 return false; |
185 } | 185 } |
186 | 186 |
187 } // namespace cast | 187 } // namespace cast |
188 } // namespace media | 188 } // namespace media |
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