69 lines
2.3 KiB
C++
69 lines
2.3 KiB
C++
/*
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* Copyright (c) 2017 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef MODULES_AUDIO_PROCESSING_GAIN_CONTROLLER2_H_
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#define MODULES_AUDIO_PROCESSING_GAIN_CONTROLLER2_H_
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#include <memory>
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#include <string>
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#include "modules/audio_processing/agc2/adaptive_digital_gain_controller.h"
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#include "modules/audio_processing/agc2/cpu_features.h"
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#include "modules/audio_processing/agc2/gain_applier.h"
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#include "modules/audio_processing/agc2/limiter.h"
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#include "modules/audio_processing/agc2/vad_wrapper.h"
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#include "modules/audio_processing/include/audio_processing.h"
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#include "modules/audio_processing/logging/apm_data_dumper.h"
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namespace webrtc {
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class AudioBuffer;
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// Gain Controller 2 aims to automatically adjust levels by acting on the
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// microphone gain and/or applying digital gain.
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class GainController2 {
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public:
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GainController2(const AudioProcessing::Config::GainController2& config,
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int sample_rate_hz,
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int num_channels);
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GainController2(const GainController2&) = delete;
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GainController2& operator=(const GainController2&) = delete;
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~GainController2();
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// Detects and handles changes of sample rate and/or number of channels.
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void Initialize(int sample_rate_hz, int num_channels);
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// Sets the fixed digital gain.
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void SetFixedGainDb(float gain_db);
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// Applies fixed and adaptive digital gains to `audio` and runs a limiter.
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void Process(AudioBuffer* audio);
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// Handles analog level changes.
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void NotifyAnalogLevel(int level);
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static bool Validate(const AudioProcessing::Config::GainController2& config);
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private:
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static int instance_count_;
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const AvailableCpuFeatures cpu_features_;
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ApmDataDumper data_dumper_;
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GainApplier fixed_gain_applier_;
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std::unique_ptr<VoiceActivityDetectorWrapper> vad_;
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std::unique_ptr<AdaptiveDigitalGainController> adaptive_digital_controller_;
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Limiter limiter_;
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int calls_since_last_limiter_log_;
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int analog_level_;
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};
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} // namespace webrtc
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#endif // MODULES_AUDIO_PROCESSING_GAIN_CONTROLLER2_H_
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