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