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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/logging.h" | 9 #include "base/logging.h" |
| 10 #include "base/macros.h" |
| 10 #include "base/time/time.h" | 11 #include "base/time/time.h" |
| 11 #include "media/audio/audio_manager.h" | 12 #include "media/audio/audio_manager.h" |
| 12 #include "media/audio/cras/audio_manager_cras.h" | 13 #include "media/audio/cras/audio_manager_cras.h" |
| 13 | 14 |
| 14 namespace media { | 15 namespace media { |
| 15 | 16 |
| 16 CrasInputStream::CrasInputStream(const AudioParameters& params, | 17 CrasInputStream::CrasInputStream(const AudioParameters& params, |
| 17 AudioManagerCras* manager, | 18 AudioManagerCras* manager, |
| 18 const std::string& device_id) | 19 const std::string& device_id) |
| 19 : audio_manager_(manager), | 20 : audio_manager_(manager), |
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| 331 | 332 |
| 332 double CrasInputStream::GetVolumeRatioFromDecibels(double dB) const { | 333 double CrasInputStream::GetVolumeRatioFromDecibels(double dB) const { |
| 333 return pow(10, dB / 20.0); | 334 return pow(10, dB / 20.0); |
| 334 } | 335 } |
| 335 | 336 |
| 336 double CrasInputStream::GetDecibelsFromVolumeRatio(double volume_ratio) const { | 337 double CrasInputStream::GetDecibelsFromVolumeRatio(double volume_ratio) const { |
| 337 return 20 * log10(volume_ratio); | 338 return 20 * log10(volume_ratio); |
| 338 } | 339 } |
| 339 | 340 |
| 340 } // namespace media | 341 } // namespace media |
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