joachim/openwebrx-clone
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Now calculating waterfall colors based on what is on the screen (with zoom).

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This commit is contained in:
Marat Fayzullin 2022-07-31 14:40:20 -04:00
parent 6192978f2f
commit 339864a572
1 changed files with 8 additions and 2 deletions
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10
htdocs/openwebrx.js
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@ -942,9 +942,15 @@ var waterfall_measure_minmax_now = false;
var waterfall_measure_minmax_continuous = false;
function waterfall_measure_minmax_do(what) {
// Get visible range
var range = get_visible_freq_range();
var start = center_freq - bandwidth / 2;
// this is based on an oversampling factor of about 1,25
var ignored = .1 * what.length;
var data = what.slice(ignored, -ignored);
range.start = Math.max(0.1, (range.start - start) / bandwidth);
range.end = Math.min(0.9, (range.end - start) / bandwidth);
var data = what.slice(range.start * what.length, range.end * what.length);
return {
min: Math.min.apply(Math, data),
max: Math.max.apply(Math, data)