digital_filter_coefficients.h

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/******************************************************************************
 * Copyright 2017 The Apollo Authors. All Rights Reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *****************************************************************************/
 
#pragma once
 
#include <vector>
 
namespace apollo {
namespace common {
 
void LpfCoefficients(const double ts, const double cutoff_freq,
                     std::vector<double> *denominators,
                     std::vector<double> *numerators);
 
void LpFirstOrderCoefficients(const double ts, const double settling_time,
                              const double dead_time,
                              std::vector<double> *denominators,
                              std::vector<double> *numerators);
 
}  // namespace common
}  // namespace apollo