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a83f874d03
New limiter tuning to more quickly go back to 0 dB after the limiter kicks in and the input peak level goes back to normal. Bug: webrtc:7494 Change-Id: I1050957ca4caf12c4562b899b16c306957dce169 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/237701 Reviewed-by: Hanna Silen <silen@webrtc.org> Commit-Queue: Alessio Bazzica <alessiob@webrtc.org> Cr-Commit-Position: refs/heads/main@{#35384}
82 lines
2.1 KiB
C++
82 lines
2.1 KiB
C++
/*
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* Copyright (c) 2018 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#ifndef MODULES_AUDIO_PROCESSING_AGC2_AGC2_TESTING_COMMON_H_
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#define MODULES_AUDIO_PROCESSING_AGC2_AGC2_TESTING_COMMON_H_
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#include <limits>
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#include <vector>
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#include "rtc_base/random.h"
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namespace webrtc {
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namespace test {
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constexpr float kMinS16 =
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static_cast<float>(std::numeric_limits<int16_t>::min());
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constexpr float kMaxS16 =
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static_cast<float>(std::numeric_limits<int16_t>::max());
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// Level Estimator test parameters.
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constexpr float kDecayMs = 20.0f;
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// Limiter parameters.
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constexpr float kLimiterMaxInputLevelDbFs = 1.f;
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constexpr float kLimiterKneeSmoothnessDb = 1.f;
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constexpr float kLimiterCompressionRatio = 5.f;
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// Returns evenly spaced `num_points` numbers over a specified interval [l, r].
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std::vector<double> LinSpace(double l, double r, int num_points);
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// Generates white noise.
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class WhiteNoiseGenerator {
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public:
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WhiteNoiseGenerator(int min_amplitude, int max_amplitude);
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float operator()();
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private:
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Random rand_gen_;
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const int min_amplitude_;
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const int max_amplitude_;
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};
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// Generates a sine function.
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class SineGenerator {
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public:
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SineGenerator(float amplitude, float frequency_hz, int sample_rate_hz);
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float operator()();
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private:
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const float amplitude_;
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const float frequency_hz_;
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const int sample_rate_hz_;
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float x_radians_;
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};
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// Generates periodic pulses.
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class PulseGenerator {
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public:
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PulseGenerator(float pulse_amplitude,
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float no_pulse_amplitude,
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float frequency_hz,
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int sample_rate_hz);
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float operator()();
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private:
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const float pulse_amplitude_;
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const float no_pulse_amplitude_;
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const int samples_period_;
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int sample_counter_;
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};
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} // namespace test
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} // namespace webrtc
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#endif // MODULES_AUDIO_PROCESSING_AGC2_AGC2_TESTING_COMMON_H_
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