mirror of https://github.com/thesofproject/sof.git
81 lines
2.5 KiB
Matlab
81 lines
2.5 KiB
Matlab
function test = mix_sweep(test)
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% SPDX-License-Identifier: BSD-3-Clause
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% Copyright(c) 2017 Intel Corporation. All rights reserved.
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% Author: Seppo Ingalsuo <seppo.ingalsuo@linux.intel.com>
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%% Adjust tone lengt to integer number of samples
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test.nt = round(test.tl*test.fs); % Make number of samples per tone
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test.tl = test.nt/test.fs; % an integer by adjusting tl.
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test.nf = length(test.f); % Number of frequencies
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test.na = length(test.a); % Number of amplitudes
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%% Test start and end marker tones
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[h1, mark_start] = sync_chirp(test.fs, 'up');
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[h2, mark_end] = sync_chirp(test.fs, 'down');
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test.mark_t = mark_start.t;
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test.mark_a = mark_start.a;
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test.mark_a_db = mark_start.a_db;
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test.ts = mark_start.t;
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%% Idle time to start and end
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test.idle_t = 0.5;
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n_idle = round(test.fs*test.idle_t);
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t_idle = n_idle/test.fs;
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x = zeros(test.nf*test.na*test.nt +mark_start.n +mark_end.n +2*n_idle, ...
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test.nch, 'int32');
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%% Add markers
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idx1 = n_idle+1;
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idx2 = length(x)-n_idle-mark_end.n;
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for ch=test.ch
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x(idx1:idx1+mark_start.n-1, ch) = dither_and_quantize(h1, test.bits_in);
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x(idx2:idx2+mark_end.n-1, ch) = dither_and_quantize(h2, test.bits_in);
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end
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%% Dither also idle parts
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x(1:n_idle) = dither_and_quantize(zeros(n_idle,1), test.bits_in);
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x(end-n_idle+1:end) = dither_and_quantize(zeros(n_idle,1), test.bits_in);
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%% Add discrete frequencies sweep
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n_r = round(test.fs*test.tr);
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win = ones(test.nt,1);
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win(1:n_r) = linspace(0,1,n_r);
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win(end-n_r+1:end) = linspace(1,0,n_r);
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i0 = n_idle+mark_start.n+1;
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nn = 1;
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for m=1:test.na
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for n=1:test.nf
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i1 = i0 + (nn-1)*test.nt;
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i2 = i1+test.nt-1;
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nn = nn+1;
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if length(test.f) > 1
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f = test.f(n);
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else
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f = test.f;
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end
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if length(test.a) > 1
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a = test.a(m);
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else
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a = test.a;
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end
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fprintf('Mixing %.0f Hz %.1f dBFS sine ...\n', f, 20*log10(a));
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s = multitone(test.fs, f, a, test.tl);
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for ch=test.ch
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x(i1:i2, ch) = dither_and_quantize(s.*win, test.bits_in);
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end
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end
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end
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sx = size(x);
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test.signal = x;
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test.length_n = sx(1);
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test.length_t = sx(1) / test.fs;
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%% Output
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fprintf('Writing output data file %s...\n', test.fn_in);
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write_test_data(x, test.fn_in, test.bits_in, test.fmt, test.fs);
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fprintf('Done.\n')
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end
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