strudel/packages/osc/osc.mjs

30 lines
1.6 KiB
JavaScript

/*
osc.mjs - <short description TODO>
Copyright (C) 2022 Strudel contributors - see <https://github.com/tidalcycles/strudel/blob/main/packages/osc/osc.mjs>
This program is free software: you can redistribute it and/or modify it under the terms of the GNU Affero General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Affero General Public License for more details. You should have received a copy of the GNU Affero General Public License along with this program. If not, see <https://www.gnu.org/licenses/>.
*/
import OSC from 'osc-js';
import { Pattern } from '@strudel.cycles/core';
const comm = new OSC();
comm.open();
const latency = 0.1;
Pattern.prototype.osc = function () {
return this._withHap((hap) => {
const onTrigger = (time, hap, currentTime) => {
// time should be audio time of onset
// currentTime should be current time of audio context (slightly before time)
const keyvals = Object.entries(hap.value).flat();
const offset = (time - currentTime + latency) * 1000;
const ts = Math.floor(Date.now() + offset);
const message = new OSC.Message('/dirt/play', ...keyvals);
const bundle = new OSC.Bundle([message], ts);
bundle.timestamp(ts); // workaround for https://github.com/adzialocha/osc-js/issues/60
comm.send(bundle);
};
return hap.setContext({ ...hap.context, onTrigger });
});
};