diff carfac/car_params.cc @ 609:aefe2ca0674f

First version of a C++ implementation by Alex Brandmeyer

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/carfac/car_params.cc	Mon May 13 22:51:15 2013 +0000
@@ -0,0 +1,72 @@
+//
+//  car_params.cc
+//  CARFAC Open Source C++ Library
+//
+//  Created by Alex Brandmeyer on 5/10/13.
+//
+// This C++ file is part of an implementation of Lyon's cochlear model:
+// "Cascade of Asymmetric Resonators with Fast-Acting Compression"
+// to supplement Lyon's upcoming book "Human and Machine Hearing"
+//
+// 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.
+
+#include "car_params.h"
+
+CARParams::CARParams(){
+  velocity_scale_ = 0.1; //for the velocity nonlinearity
+  v_offset_ = 0.04; //offset gives quadratic part
+  min_zeta_ = 0.1; //minimum damping factor in mid-freq channels
+  max_zeta_ = 0.35; //maximum damping factor in mid-freq channels
+  first_pole_theta_ = 0.85 * PI;
+  zero_ratio_ = 1.4142; //how far zero is above pole
+  high_f_damping_compression_ = 0.5; //0 to 1 to compress theta
+  erb_per_step_ = 0.5; //assume G&M's ERB formula
+  min_pole_hz_ = 30;
+  erb_break_freq_ = 165.3; //Greenwood map's break frequency
+  erb_q_ = 1000/(24.7*4.37);
+};
+
+//This method has been created for debugging purposes and depends on <iostream>.
+//Could possibly be removed in the final version to reduce dependencies.
+void CARParams::OutputParams(){
+  std::cout << "CARParams Values" << std::endl;
+  std::cout << "****************" << std::endl;
+  std::cout << "velocity_scale_ = " << velocity_scale_ << std::endl;
+  std::cout << "v_offset_ = " << v_offset_ << std::endl;
+  std::cout << "min_zeta_ = " << min_zeta_ << std::endl;
+  std::cout << "max_zeta_ = " << max_zeta_ << std::endl;
+  std::cout << "first_pole_theta_ = " << first_pole_theta_ << std::endl;
+  std::cout << "zero_ratio_ = " << zero_ratio_ << std::endl;
+  std::cout << "high_f_damping_compression_ = " << high_f_damping_compression_
+            << std::endl;
+  std::cout << "erb_per_step_ = " << erb_per_step_ << std::endl;
+  std::cout << "min_pole_hz_ = " << min_pole_hz_ << std::endl;
+  std::cout << "erb_break_freq_ = " << erb_break_freq_ << std::endl;
+  std::cout << "erb_q_ = " << erb_q_ << std::endl << std::endl;
+}
+
+void CARParams::SetParams(FPType vs, FPType voff, FPType min_z, FPType max_z,
+                          FPType fpt, FPType zr, FPType hfdc, FPType erbps,
+                          FPType mph, FPType erbbf, FPType erbq) {  
+  velocity_scale_ = vs;
+  v_offset_ = voff;
+  min_zeta_ = min_z;
+  max_zeta_ = max_z;
+  first_pole_theta_ = fpt;
+  zero_ratio_ = zr;
+  high_f_damping_compression_ = hfdc;
+  erb_per_step_ = erbps;
+  min_pole_hz_ = mph;
+  erb_break_freq_ = erbbf;
+  erb_q_ = erbq;
+};
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