function test = thdnf_test_input(test) %% t = dr_test_input(t) % % Create tone data file for playback & record on real device or % for algorithm simulation. % % Input parameters % t.fs - sample rate % t.bits_in - signal word length % t.ch - mix test signal to channel ch % t.nch - total number of channels in data % % Output parameters % t.fn_in - created input file name % t.fn_out - proposed output file name for captured output % t.f - test signal frequency % t.tl - tone length in seconds % t.ts - tone start time % t.tr - tone gain ramp length in seconds % t.ti - ignore time from tone start and end, must be ti > tr % t.a - tone amplitude (lin) % t.a_db - tone amplitude (dB) % t.mark_t - length of marker tone in seconds % t.mark_a - amplitude max of marker tone (lin) % t.mark_a_db - amplitude max of marker tone (dB) % %% % Copyright (c) 2016, Intel Corporation % All rights reserved. % % Redistribution and use in source and binary forms, with or without % modification, are permitted provided that the following conditions are met: % * Redistributions of source code must retain the above copyright % notice, this list of conditions and the following disclaimer. % * Redistributions in binary form must reproduce the above copyright % notice, this list of conditions and the following disclaimer in the % documentation and/or other materials provided with the distribution. % * Neither the name of the Intel Corporation nor the % names of its contributors may be used to endorse or promote products % derived from this software without specific prior written permission. % % THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" % AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE % IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE % ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE % LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR % CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF % SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS % INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN % CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) % ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE % POSSIBILITY OF SUCH DAMAGE. % % Author: Seppo Ingalsuo % %% Reference: AES17 6.3.2 THD+N ratio vs frequency % http://www.aes.org/publications/standards/ if nargin < 1 fprintf('Warning, using default parameters!\n'); test.fs = 48e3; test.f_start=20; test.f_end=20e3; test.bits_in=32; test.ch=1; test.nch=1; end if test.ch == 0 test.ch = 1+round(rand(1,1)*(test.nch-1)); % Test random channel 1..Nch end fprintf('Using parameters Fstart=%.0f Hz, Fend=%.0f Hz, Fs=%.1f Hz, bits_in=%d, ch=%d, Nch=%d\n', ... test.f_start, test.f_end, test.fs/1e3, test.bits_in, test.ch, test.nch ); test.fn_in = sprintf('thdnf_test_in.%s', test.fmt); test.fn_out = sprintf('thdnf_test_out.%s', test.fmt); noct = ceil(log(test.f_end/test.f_start)/log(2)); % Max 1 octave steps test.f = logspace(log10(test.f_start),log10(test.f_end), noct); %% Tone sweep parameters test.is = 20e-3; % Ignore signal from tone start test.ie = 20e-3; % Ignore signal from tone end test.tr = 10e-3; % Gain ramp time for tones test.sm = 3; % Seek start marker from 3s from start test.em = 3; % Seek end marker from 3s from end test.mt = 0.1; % Error if marker positions delta is greater than 0.1s test.a_db = [-1 -20]; % -1 and -20 dBFS levels test.a = 10.^(test.a_db/20); test.tl = 4; % 3 seconds tone test.nst = 2; % Wait 1 seconds for frequency specific notch output to settle %% Mix the input file for test and write output test = mix_sweep(test); end