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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 <limits>
#include <vector>
#include "rtc_base/random.h"
namespace webrtc {
namespace test {
constexpr float kMinS16 =
static_cast<float>(std::numeric_limits<int16_t>::min());
constexpr float kMaxS16 =
static_cast<float>(std::numeric_limits<int16_t>::max());
// Level Estimator test parameters.
constexpr float kDecayMs = 20.0f;
// Limiter parameters.
constexpr float kLimiterMaxInputLevelDbFs = 1.f;
constexpr float kLimiterKneeSmoothnessDb = 1.f;
constexpr float kLimiterCompressionRatio = 5.f;
// Returns evenly spaced `num_points` numbers over a specified interval [l, r].
std::vector<double> LinSpace(double l, double r, int num_points);
// Generates white noise.
class WhiteNoiseGenerator {
public:
WhiteNoiseGenerator(int min_amplitude, int max_amplitude);
float operator()();
private:
Random rand_gen_;
const int min_amplitude_;
const int max_amplitude_;
};
// Generates a sine function.
class SineGenerator {
public:
SineGenerator(float amplitude, float frequency_hz, int sample_rate_hz);
float operator()();
private:
const float amplitude_;
const float frequency_hz_;
const int sample_rate_hz_;
float x_radians_;
};
// Generates periodic pulses.
class PulseGenerator {
public:
PulseGenerator(float pulse_amplitude,
float no_pulse_amplitude,
float frequency_hz,
int sample_rate_hz);
float operator()();
private:
const float pulse_amplitude_;
const float no_pulse_amplitude_;
const int samples_period_;
int sample_counter_;
};
} // namespace test
} // namespace webrtc
#endif // MODULES_AUDIO_PROCESSING_AGC2_AGC2_TESTING_COMMON_H_
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