blob: 3dde9be61e0783ad9df16b2b38d5acfc0e588a7d [file] [log] [blame]
* Copyright (c) 2017 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 <stdint.h>
#include "api/array_view.h"
namespace webrtc {
class GainChangeCalculator {
// The 'out' signal is assumed to be produced from 'in' by applying
// a smoothly varying gain. This method computes variations of the
// gain and handles special cases when the samples are small.
float CalculateGainChange(rtc::ArrayView<const int16_t> in,
rtc::ArrayView<const int16_t> out);
float LatestGain() const;
void CalculateGain(rtc::ArrayView<const int16_t> in,
rtc::ArrayView<const int16_t> out,
rtc::ArrayView<float> gain);
float CalculateDifferences(rtc::ArrayView<const float> values);
float last_value_ = 0.f;
float last_reliable_gain_ = 1.0f;
} // namespace webrtc