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70b775d77f
Code style improvements done in preparation for a bug fix (TODO added) which requires changes in the unit tests. Note that one expected value in the unit tests has been adjusted since the white noise generator is now instanced in each separate test and therefore, even if the seed remained the same, the generated sequences differ. Bug: webrtc:7494 Change-Id: I497513b84f50b5c66cf6241a09946ce853eb1cd2 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/214122 Commit-Queue: Alessio Bazzica <alessiob@webrtc.org> Reviewed-by: Ivo Creusen <ivoc@webrtc.org> Cr-Commit-Position: refs/heads/master@{#33636}
93 lines
3 KiB
C++
93 lines
3 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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#include "modules/audio_processing/agc2/agc2_testing_common.h"
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#include <cmath>
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#include "rtc_base/checks.h"
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namespace webrtc {
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namespace test {
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std::vector<double> LinSpace(double l, double r, int num_points) {
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RTC_CHECK_GE(num_points, 2);
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std::vector<double> points(num_points);
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const double step = (r - l) / (num_points - 1.0);
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points[0] = l;
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for (int i = 1; i < num_points - 1; i++) {
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points[i] = static_cast<double>(l) + i * step;
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}
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points[num_points - 1] = r;
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return points;
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}
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WhiteNoiseGenerator::WhiteNoiseGenerator(int min_amplitude, int max_amplitude)
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: rand_gen_(42),
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min_amplitude_(min_amplitude),
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max_amplitude_(max_amplitude) {
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RTC_DCHECK_LT(min_amplitude_, max_amplitude_);
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RTC_DCHECK_LE(kMinS16, min_amplitude_);
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RTC_DCHECK_LE(min_amplitude_, kMaxS16);
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RTC_DCHECK_LE(kMinS16, max_amplitude_);
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RTC_DCHECK_LE(max_amplitude_, kMaxS16);
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}
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float WhiteNoiseGenerator::operator()() {
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return static_cast<float>(rand_gen_.Rand(min_amplitude_, max_amplitude_));
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}
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SineGenerator::SineGenerator(float amplitude,
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float frequency_hz,
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int sample_rate_hz)
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: amplitude_(amplitude),
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frequency_hz_(frequency_hz),
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sample_rate_hz_(sample_rate_hz),
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x_radians_(0.0f) {
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RTC_DCHECK_GT(amplitude_, 0);
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RTC_DCHECK_LE(amplitude_, kMaxS16);
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}
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float SineGenerator::operator()() {
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constexpr float kPi = 3.1415926536f;
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x_radians_ += frequency_hz_ / sample_rate_hz_ * 2 * kPi;
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if (x_radians_ >= 2 * kPi) {
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x_radians_ -= 2 * kPi;
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}
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return amplitude_ * std::sinf(x_radians_);
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}
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PulseGenerator::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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: pulse_amplitude_(pulse_amplitude),
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no_pulse_amplitude_(no_pulse_amplitude),
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samples_period_(
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static_cast<int>(static_cast<float>(sample_rate_hz) / frequency_hz)),
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sample_counter_(0) {
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RTC_DCHECK_GE(pulse_amplitude_, kMinS16);
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RTC_DCHECK_LE(pulse_amplitude_, kMaxS16);
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RTC_DCHECK_GT(no_pulse_amplitude_, kMinS16);
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RTC_DCHECK_LE(no_pulse_amplitude_, kMaxS16);
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RTC_DCHECK_GT(sample_rate_hz, frequency_hz);
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}
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float PulseGenerator::operator()() {
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sample_counter_++;
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if (sample_counter_ >= samples_period_) {
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sample_counter_ -= samples_period_;
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}
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return static_cast<float>(sample_counter_ == 0 ? pulse_amplitude_
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: no_pulse_amplitude_);
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}
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} // namespace test
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} // namespace webrtc
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