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1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. | 1 // Copyright (c) 2012 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 "media/audio/cras/cras_input.h" | 5 #include "media/audio/cras/cras_input.h" |
6 | 6 |
7 #include <math.h> | 7 #include <math.h> |
8 | 8 |
9 #include "base/basictypes.h" | 9 #include "base/basictypes.h" |
10 #include "base/bind.h" | 10 #include "base/bind.h" |
11 #include "base/logging.h" | 11 #include "base/logging.h" |
12 #include "base/time.h" | 12 #include "base/time/time.h" |
13 #include "media/audio/audio_manager.h" | 13 #include "media/audio/audio_manager.h" |
14 #include "media/audio/cras/audio_manager_cras.h" | 14 #include "media/audio/cras/audio_manager_cras.h" |
15 #include "media/audio/linux/alsa_util.h" | 15 #include "media/audio/linux/alsa_util.h" |
16 | 16 |
17 namespace media { | 17 namespace media { |
18 | 18 |
19 CrasInputStream::CrasInputStream(const AudioParameters& params, | 19 CrasInputStream::CrasInputStream(const AudioParameters& params, |
20 AudioManagerCras* manager) | 20 AudioManagerCras* manager) |
21 : audio_manager_(manager), | 21 : audio_manager_(manager), |
22 bytes_per_frame_(0), | 22 bytes_per_frame_(0), |
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270 | 270 |
271 double CrasInputStream::GetVolumeRatioFromDecibels(double dB) const { | 271 double CrasInputStream::GetVolumeRatioFromDecibels(double dB) const { |
272 return pow(10, dB / 20.0); | 272 return pow(10, dB / 20.0); |
273 } | 273 } |
274 | 274 |
275 double CrasInputStream::GetDecibelsFromVolumeRatio(double volume_ratio) const { | 275 double CrasInputStream::GetDecibelsFromVolumeRatio(double volume_ratio) const { |
276 return 20 * log10(volume_ratio); | 276 return 20 * log10(volume_ratio); |
277 } | 277 } |
278 | 278 |
279 } // namespace media | 279 } // namespace media |
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