45 lines
1.4 KiB
C
45 lines
1.4 KiB
C
|
/*
|
||
|
|
* Copyright (c) 2018 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.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifndef MODULES_AUDIO_PROCESSING_AGC2_GAIN_APPLIER_H_
|
||
|
|
#define MODULES_AUDIO_PROCESSING_AGC2_GAIN_APPLIER_H_
|
||
|
|
|
||
|
|
#include <stddef.h>
|
||
|
|
|
||
|
|
#include "modules/audio_processing/include/audio_frame_view.h"
|
||
|
|
|
||
|
|
namespace webrtc {
|
||
|
|
class GainApplier {
|
||
|
|
public:
|
||
|
|
GainApplier(bool hard_clip_samples, float initial_gain_factor);
|
||
|
|
|
||
|
|
void ApplyGain(AudioFrameView<float> signal);
|
||
|
|
void SetGainFactor(float gain_factor);
|
||
|
|
float GetGainFactor() const { return current_gain_factor_; };
|
||
|
|
|
||
|
|
private:
|
||
|
|
void Initialize(size_t samples_per_channel);
|
||
|
|
|
||
|
|
// Whether to clip samples after gain is applied. If 'true', result
|
||
|
|
// will fit in FloatS16 range.
|
||
|
|
const bool hard_clip_samples_;
|
||
|
|
float last_gain_factor_;
|
||
|
|
|
||
|
|
// If this value is not equal to 'last_gain_factor', gain will be
|
||
|
|
// ramped from 'last_gain_factor_' to this value during the next
|
||
|
|
// 'ApplyGain'.
|
||
|
|
float current_gain_factor_;
|
||
|
|
int samples_per_channel_ = -1;
|
||
|
|
float inverse_samples_per_channel_ = -1.f;
|
||
|
|
};
|
||
|
|
} // namespace webrtc
|
||
|
|
|
||
|
|
#endif // MODULES_AUDIO_PROCESSING_AGC2_GAIN_APPLIER_H_
|