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| 1 /* |
| 2 * Copyright (c) 2017 The WebRTC project authors. All Rights Reserved. |
| 3 * |
| 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 |
| 6 * tree. An additional intellectual property rights grant can be found |
| 7 * in the file PATENTS. All contributing project authors may |
| 8 * be found in the AUTHORS file in the root of the source tree. |
| 9 */ |
| 10 |
| 11 #ifndef WEBRTC_MODULES_AUDIO_PROCESSING_AGC2_GAIN_CONTROLLER2_H_ |
| 12 #define WEBRTC_MODULES_AUDIO_PROCESSING_AGC2_GAIN_CONTROLLER2_H_ |
| 13 |
| 14 #include <memory> |
| 15 #include <string> |
| 16 |
| 17 #include "webrtc/base/constructormagic.h" |
| 18 #include "webrtc/modules/audio_processing/include/audio_processing.h" |
| 19 #include "webrtc/modules/audio_processing/agc2/digital_gain_applier.h" |
| 20 |
| 21 namespace webrtc { |
| 22 |
| 23 class ApmDataDumper; |
| 24 class AudioBuffer; |
| 25 |
| 26 // Gain Controller 2 aims to automatically adjust levels by acting on the |
| 27 // microphone gain and/or applying digital gain. |
| 28 // |
| 29 // It temporarily implements a hard-coded gain mode only. |
| 30 class GainController2 { |
| 31 public: |
| 32 explicit GainController2(int sample_rate_hz); |
| 33 ~GainController2(); |
| 34 |
| 35 int sample_rate_hz() { return sample_rate_hz_; } |
| 36 |
| 37 void Process(AudioBuffer* audio); |
| 38 |
| 39 static bool Validate(const AudioProcessing::Config::GainController2& config); |
| 40 static std::string ToString( |
| 41 const AudioProcessing::Config::GainController2& config); |
| 42 |
| 43 private: |
| 44 int sample_rate_hz_; |
| 45 std::unique_ptr<ApmDataDumper> data_dumper_; |
| 46 DigitalGainApplier digital_gain_applier_; |
| 47 static int instance_count_; |
| 48 // TODO(alessiob): Remove once a meaningful gain controller mode is |
| 49 // implemented. |
| 50 const float gain_; |
| 51 RTC_DISALLOW_COPY_AND_ASSIGN(GainController2); |
| 52 }; |
| 53 |
| 54 } // namespace webrtc |
| 55 |
| 56 #endif // WEBRTC_MODULES_AUDIO_PROCESSING_AGC2_GAIN_CONTROLLER2_H_ |
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