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/*
* 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_AGC2_TESTING_COMMON_H_
#define MODULES_AUDIO_PROCESSING_AGC2_AGC2_TESTING_COMMON_H_
#include <math.h>
#include <limits>
#include <vector>
#include "rtc_base/checks.h"
namespace webrtc {
namespace test {
// Level Estimator test parameters.
constexpr float kDecayMs = 500.f;
// Limiter parameters.
constexpr float kLimiterMaxInputLevelDbFs = 1.f;
constexpr float kLimiterKneeSmoothnessDb = 1.f;
constexpr float kLimiterCompressionRatio = 5.f;
constexpr float kPi = 3.1415926536f;
std::vector<double> LinSpace(const double l, const double r, size_t num_points);
class SineGenerator {
public:
SineGenerator(float frequency, int rate)
: frequency_(frequency), rate_(rate) {}
float operator()() {
x_radians_ += frequency_ / rate_ * 2 * kPi;
if (x_radians_ > 2 * kPi) {
x_radians_ -= 2 * kPi;
}
return 1000.f * sinf(x_radians_);
}
private:
float frequency_;
int rate_;
float x_radians_ = 0.f;
};
class PulseGenerator {
public:
PulseGenerator(float frequency, int rate)
: samples_period_(
static_cast<int>(static_cast<float>(rate) / frequency)) {
RTC_DCHECK_GT(rate, frequency);
}
float operator()() {
sample_counter_++;
if (sample_counter_ >= samples_period_) {
sample_counter_ -= samples_period_;
}
return static_cast<float>(
sample_counter_ == 0 ? std::numeric_limits<int16_t>::max() : 10.f);
}
private:
int samples_period_;
int sample_counter_ = 0;
};
} // namespace test
} // namespace webrtc
#endif // MODULES_AUDIO_PROCESSING_AGC2_AGC2_TESTING_COMMON_H_
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