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1 /* | 1 /* |
2 * Copyright (c) 2016 The WebRTC project authors. All Rights Reserved. | 2 * Copyright (c) 2016 The WebRTC project authors. All Rights Reserved. |
3 * | 3 * |
4 * Use of this source code is governed by a BSD-style license | 4 * Use of this source code is governed by a BSD-style license |
5 * that can be found in the LICENSE file in the root of the source | 5 * that can be found in the LICENSE file in the root of the source |
6 * tree. An additional intellectual property rights grant can be found | 6 * tree. An additional intellectual property rights grant can be found |
7 * in the file PATENTS. All contributing project authors may | 7 * in the file PATENTS. All contributing project authors may |
8 * be found in the AUTHORS file in the root of the source tree. | 8 * be found in the AUTHORS file in the root of the source tree. |
9 */ | 9 */ |
10 | 10 |
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31 | 31 |
32 class LevelController { | 32 class LevelController { |
33 public: | 33 public: |
34 LevelController(); | 34 LevelController(); |
35 ~LevelController(); | 35 ~LevelController(); |
36 | 36 |
37 void Initialize(int sample_rate_hz); | 37 void Initialize(int sample_rate_hz); |
38 void Process(AudioBuffer* audio); | 38 void Process(AudioBuffer* audio); |
39 float GetLastGain() { return last_gain_; } | 39 float GetLastGain() { return last_gain_; } |
40 | 40 |
| 41 // Sets the initial peak level to use inside the level controller in order |
| 42 // to compute the signal gain. The unit for the peak level is dBFS and |
| 43 // the allowed range is [-100, 0]. |
| 44 void SetInitialLevel(float level); |
| 45 |
41 private: | 46 private: |
42 class Metrics { | 47 class Metrics { |
43 public: | 48 public: |
44 Metrics() { Initialize(AudioProcessing::kSampleRate48kHz); } | 49 Metrics() { Initialize(AudioProcessing::kSampleRate48kHz); } |
45 void Initialize(int sample_rate_hz); | 50 void Initialize(int sample_rate_hz); |
46 void Update(float peak_level, float noise_level, float gain); | 51 void Update(float peak_level, float noise_level, float gain); |
47 | 52 |
48 private: | 53 private: |
49 void Reset(); | 54 void Reset(); |
50 | 55 |
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64 SignalClassifier signal_classifier_; | 69 SignalClassifier signal_classifier_; |
65 NoiseLevelEstimator noise_level_estimator_; | 70 NoiseLevelEstimator noise_level_estimator_; |
66 PeakLevelEstimator peak_level_estimator_; | 71 PeakLevelEstimator peak_level_estimator_; |
67 SaturatingGainEstimator saturating_gain_estimator_; | 72 SaturatingGainEstimator saturating_gain_estimator_; |
68 Metrics metrics_; | 73 Metrics metrics_; |
69 rtc::Optional<int> sample_rate_hz_; | 74 rtc::Optional<int> sample_rate_hz_; |
70 static int instance_count_; | 75 static int instance_count_; |
71 float dc_level_[2]; | 76 float dc_level_[2]; |
72 float dc_forgetting_factor_; | 77 float dc_forgetting_factor_; |
73 float last_gain_; | 78 float last_gain_; |
| 79 bool gain_jumpstart_ = false; |
74 | 80 |
75 RTC_DISALLOW_COPY_AND_ASSIGN(LevelController); | 81 RTC_DISALLOW_COPY_AND_ASSIGN(LevelController); |
76 }; | 82 }; |
77 | 83 |
78 } // namespace webrtc | 84 } // namespace webrtc |
79 | 85 |
80 #endif // WEBRTC_MODULES_AUDIO_PROCESSING_LEVEL_CONTROLLER_LEVEL_CONTROLLER_H_ | 86 #endif // WEBRTC_MODULES_AUDIO_PROCESSING_LEVEL_CONTROLLER_LEVEL_CONTROLLER_H_ |
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