chromium/third_party/webrtc/modules/audio_processing/capture_levels_adjuster/capture_levels_adjuster.cc

/*
 *  Copyright (c) 2021 The WebRTC project authors. All Rights Reserved.
 *
 *  Use of this source code is governed by a BSD-style license
 *  that can be found in the LICENSE file in the root of the source
 *  tree. An additional intellectual property rights grant can be found
 *  in the file PATENTS.  All contributing project authors may
 *  be found in the AUTHORS file in the root of the source tree.
 */
#include "modules/audio_processing/capture_levels_adjuster/capture_levels_adjuster.h"

#include "modules/audio_processing/audio_buffer.h"
#include "rtc_base/checks.h"
#include "rtc_base/numerics/safe_minmax.h"

namespace webrtc {

namespace {

constexpr int kMinAnalogMicGainLevel = …;
constexpr int kMaxAnalogMicGainLevel = …;

float ComputeLevelBasedGain(int emulated_analog_mic_gain_level) { … }

float ComputePreGain(float pre_gain,
                     int emulated_analog_mic_gain_level,
                     bool emulated_analog_mic_gain_enabled) { … }

}  // namespace

CaptureLevelsAdjuster::CaptureLevelsAdjuster(
    bool emulated_analog_mic_gain_enabled,
    int emulated_analog_mic_gain_level,
    float pre_gain,
    float post_gain)
    : … { … }

void CaptureLevelsAdjuster::ApplyPreLevelAdjustment(AudioBuffer& audio_buffer) { … }

void CaptureLevelsAdjuster::ApplyPostLevelAdjustment(
    AudioBuffer& audio_buffer) { … }

void CaptureLevelsAdjuster::SetPreGain(float pre_gain) { … }

void CaptureLevelsAdjuster::SetPostGain(float post_gain) { … }

void CaptureLevelsAdjuster::SetAnalogMicGainLevel(int level) { … }

void CaptureLevelsAdjuster::UpdatePreAdjustmentGain() { … }

}  // namespace webrtc