tom@516: % Copyright 2012, Google, Inc.
tom@516: % Author: Richard F. Lyon
tom@516: %
tom@516: % This Matlab file is part of an implementation of Lyon's cochlear model:
tom@516: % "Cascade of Asymmetric Resonators with Fast-Acting Compression"
tom@516: % to supplement Lyon's upcoming book "Human and Machine Hearing"
tom@516: %
tom@516: % Licensed under the Apache License, Version 2.0 (the "License");
tom@516: % you may not use this file except in compliance with the License.
tom@516: % You may obtain a copy of the License at
tom@516: %
tom@516: %     http://www.apache.org/licenses/LICENSE-2.0
tom@516: %
tom@516: % Unless required by applicable law or agreed to in writing, software
tom@516: % distributed under the License is distributed on an "AS IS" BASIS,
tom@516: % WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
tom@516: % See the License for the specific language governing permissions and
tom@516: % limitations under the License.
tom@516: 
tom@516: % Test/demo hacking for audio/hearing/filterbanks/carfac/matlab/ stuff
tom@516: 
tom@516: clear variables
tom@516: 
tom@516: agc_plot_fig_num = 1;
tom@516: 
tom@516: tic
tom@516: 
tom@516: %test_signal = wavread('pbav4p-22050.wav');
tom@516: test_signal = wavread('plan-twochannel-1ms.wav')
tom@516: %test_signal = wavread('binaural.wav')
tom@516: %test_signal = test_signal(20000:2);  % trim for a faster test
tom@516: 
tom@516: CF_struct = CARFAC_Design;  % default design
tom@516: cum_k = 0;  % not doing segments, so just count from 0
tom@516: 
tom@516: % Run mono, then stereo test:
tom@516: n_mics = 2
tom@516: CF_struct = CARFAC_Init(CF_struct, n_mics);
tom@516: 
tom@516: [nap, CF_struct, cum_k, nap_decim] = ...
tom@516:     CARFAC_Run(CF_struct, test_signal, cum_k, agc_plot_fig_num);
tom@516: 
tom@516: % Display results for 1 or 2 mics:
tom@516: for mic = 1:n_mics
tom@516:   smooth_nap = nap_decim(:, :, mic);
tom@516:   figure(mic + n_mics)  % Makes figures 2, 3, and 4
tom@516:   image(63 * ((smooth_nap)' .^ 0.5))
tom@516: 
tom@516:   colormap(1 - gray);
tom@516: end
tom@516: 
tom@516: toc
tom@516: 
tom@516: % Show resulting data, even though M-Lint complains:
tom@516: cum_k
tom@516: CF_struct
tom@516: CF_struct.filter_state
tom@516: CF_struct.AGC_state
tom@516: min_max = [min(nap(:)), max(nap(:))]
tom@516: min_max_decim = [min(nap_decim(:)), max(nap_decim(:))]