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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 "content/renderer/media/media_stream_audio_level_calculator.h" | 5 #include "content/renderer/media/media_stream_audio_level_calculator.h" |
6 | 6 |
7 #include "base/float_util.h" | |
8 #include "base/logging.h" | 7 #include "base/logging.h" |
9 #include "base/stl_util.h" | 8 #include "base/stl_util.h" |
10 #include "media/base/audio_bus.h" | 9 #include "media/base/audio_bus.h" |
11 | 10 |
12 namespace content { | 11 namespace content { |
13 | 12 |
14 namespace { | 13 namespace { |
15 | 14 |
16 // Calculates the maximum absolute amplitude of the audio data. | 15 // Calculates the maximum absolute amplitude of the audio data. |
17 float MaxAmplitude(const float* audio_data, int length) { | 16 float MaxAmplitude(const float* audio_data, int length) { |
18 float max = 0.0f; | 17 float max = 0.0f; |
19 for (int i = 0; i < length; ++i) { | 18 for (int i = 0; i < length; ++i) { |
20 const float absolute = fabsf(audio_data[i]); | 19 const float absolute = fabsf(audio_data[i]); |
21 if (absolute > max) | 20 if (absolute > max) |
22 max = absolute; | 21 max = absolute; |
23 } | 22 } |
24 DCHECK(base::IsFinite(max)); | 23 DCHECK(std::isfinite(max)); |
Mark Mentovai
2015/04/09 12:46:37
#include <cmath>. I asked you to self-review to fi
Mateusz Szymański
2015/04/09 15:32:29
Done.
| |
25 return max; | 24 return max; |
26 } | 25 } |
27 | 26 |
28 } // namespace | 27 } // namespace |
29 | 28 |
30 MediaStreamAudioLevelCalculator::MediaStreamAudioLevelCalculator() | 29 MediaStreamAudioLevelCalculator::MediaStreamAudioLevelCalculator() |
31 : counter_(0), | 30 : counter_(0), |
32 max_amplitude_(0.0f), | 31 max_amplitude_(0.0f), |
33 level_(0.0f) { | 32 level_(0.0f) { |
34 } | 33 } |
(...skipping 24 matching lines...) Expand all Loading... | |
59 max_amplitude_ /= 4.0f; | 58 max_amplitude_ /= 4.0f; |
60 | 59 |
61 // Reset the counter. | 60 // Reset the counter. |
62 counter_ = 0; | 61 counter_ = 0; |
63 } | 62 } |
64 | 63 |
65 return level_; | 64 return level_; |
66 } | 65 } |
67 | 66 |
68 } // namespace content | 67 } // namespace content |
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