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audio-filters: expose gain control

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ed 2021-06-16 22:25:29 +02:00
parent 56086e8984
commit e08c03b886
1 changed files with 27 additions and 8 deletions
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35
copyparty/web/browser.js
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@ -551,6 +551,7 @@ var audio_eq = (function () {
"bands": [31.25, 62.5, 125, 250, 500, 1000, 2000, 4000, 8000, 16000],
"gains": [4, 3, 2, 1, 0, 0, 1, 2, 3, 4],
"filters": [],
"amp": 0,
"last_au": null
};
@ -571,6 +572,7 @@ var audio_eq = (function () {
];
try {
r.amp = fcfg_get('au_eq_amp', r.amp);
var gains = jread('au_eq_gain', r.gains);
if (r.gains.length == gains.length)
r.gains = gains;
@ -579,10 +581,13 @@ var audio_eq = (function () {
r.draw = function () {
jwrite('au_eq_gain', r.gains);
swrite('au_eq_amp', r.amp);
var txt = QSA('input.eq_gain');
for (var a = 0; a < r.bands.length; a++)
txt[a].value = r.gains[a];
QS('input.eq_gain[band="amp"]').value = r.amp;
};
r.apply = function () {
@ -647,7 +652,7 @@ var audio_eq = (function () {
r.filters[a].connect(a > 0 ? r.filters[a - 1] : mp.ac.destination);
}
fi = mp.ac.createGain();
fi.gain.value = '0.94'; // +.137 dB measured; now -.25 dB and almost bitperfect
fi.gain.value = r.amp + 0.94; // +.137 dB measured; now -.25 dB and almost bitperfect
mp.acs.connect(fi);
fi.connect(r.filters[r.filters.length - 1]);
r.filters.push(fi);
@ -658,7 +663,11 @@ var audio_eq = (function () {
var band = parseInt(this.getAttribute('band')),
step = parseFloat(this.getAttribute('step'));
r.gains[band] += step;
if (isNaN(band))
r.amp = Math.round((r.amp + step * 0.2) * 100) / 100;
else
r.gains[band] += step;
r.apply();
}
@ -670,7 +679,10 @@ var audio_eq = (function () {
if (isNaN(v))
throw 42;
r.gains[band] = v + step;
if (isNaN(band))
r.amp = Math.round((v + step * 0.2) * 100) / 100;
else
r.gains[band] = v + step;
}
catch (ex) {
return;
@ -693,16 +705,23 @@ var audio_eq = (function () {
'<a id="au_eq" class="tgl btn" href="#">enable</a></td>'],
h2 = [], h3 = [], h4 = [];
var vs = [];
for (var a = 0; a < r.bands.length; a++) {
var hz = r.bands[a];
if (hz >= 1000)
hz = (hz / 1000) + 'k';
hz = (hz + '').split('.')[0];
html.push('<td><a href="#" class="eq_step" step="0.5" band="' + a + '">+</a></td>');
h2.push('<td>' + hz + '</td>');
h4.push('<td><a href="#" class="eq_step" step="-0.5" band="' + a + '">&ndash;</a></td>');
h3.push('<td><input type="text" class="eq_gain" band="' + a + '" value="' + r.gains[a] + '" /></td>');
vs.push([a, hz, r.gains[a]]);
}
vs.push(["amp", "boost", r.amp]);
for (var a = 0; a < vs.length; a++) {
var b = vs[a][0];
html.push('<td><a href="#" class="eq_step" step="0.5" band="' + b + '">+</a></td>');
h2.push('<td>' + vs[a][1] + '</td>');
h4.push('<td><a href="#" class="eq_step" step="-0.5" band="' + b + '">&ndash;</a></td>');
h3.push('<td><input type="text" class="eq_gain" band="' + b + '" value="' + vs[a][2] + '" /></td>');
}
html = html.join('\n') + '</tr><tr>';
html += h2.join('\n') + '</tr><tr>';
@ -715,7 +734,7 @@ var audio_eq = (function () {
stp[a].onclick = eq_step;
var txt = QSA('input.eq_gain');
for (var a = 0; a < r.gains.length; a++) {
for (var a = 0; a < txt.length; a++) {
txt[a].oninput = eq_mod;
txt[a].onkeydown = eq_keydown;
}