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Tools: Tune: EQ: Improve robustness of mls_freq_resp script 

This patch increases end marker seek length from 3s to 5s to
allow more drift for arecord and aplay timing for test signal.
The captured waveform is now always plotted and when start
and end markers are found the test signal is plotted with green
color.

Signed-off-by: Seppo Ingalsuo <seppo.ingalsuo@linux.intel.com>
This commit is contained in:
Seppo Ingalsuo 2022-01-12 15:13:03 +02:00 committed by Liam Girdwood
parent 387d74ea6d
commit a9fb42836f
1 changed files with 14 additions and 9 deletions
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23
tools/tune/eq/mls_freq_resp.m
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@ -74,7 +74,7 @@ audiowrite(mlsfn, mls, fs);
[x2, m2] = sync_chirp(fs, 'down');
fnd.fs = fs; % Sample rate
fnd.sm = 5; % Max seek from start
fnd.em = 3; % Max seek from end
fnd.em = 5; % Max seek from end
fnd.idle_t = 2; % max idle in start or end
fnd.mark_t = m1.t; % Marker length
fnd.nf = 1; % One signal (amplitude)
@ -121,20 +121,25 @@ for i=1:play_cfg.nch
pause(3);
r = get_recording(recfn, rec_cfg);
end
[d, nt] = find_test_signal(r(:,1), fnd);
[d, nt] = find_test_signal(r(:,1), fnd);
figure;
sr = size(r);
ts = (0:sr(1)-1)/fs;
plot(ts, r(:,1));
grid on;
xlabel('Time (s)');
ylabel('Sample value');
if isempty(d)
figure;
sr = size(r);
ts = (0:sr(1)-1)/fs;
plot(ts, r(:,1));
grid on;
xlabel('Time (s)');
ylabel('Sample value');
title('Captured audio test waveform');
fprintf(1, 'Error: check the plot for skew in capture/playback.\n');
f = [];
m_db = [];
return
else
si = d:d + nt;
hold on
plot(ts(si), r(si), 'g');
hold off
end
for j = 1:rec_cfg.nch
y(:, rec_cfg.nch*(i-1) + j) = r(d:d + nt -1, j);