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Merge pull request #303 from gogins/main

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Updated csoundm to use the register facility .
This commit is contained in:
Felix Roos 2022-12-13 22:07:27 +01:00 committed by GitHub
commit 2cd77b075b
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1 changed files with 60 additions and 10 deletions
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70
packages/csound/csound.mjs
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@ -79,21 +79,25 @@ function eventLogger(type, args) {
async function load() {
if (window.__csound__) {
// allows using some other csound instance
// Allows using some other csound instance.
// In that case, the external Csound is responsible
// for compiling an orchestra and starting to perform.
logger('[load] Using external Csound', 'warning');
_csound = window.__csound__;
return _csound;
} else {
const { Csound } = await import('@csound/browser');
_csound = await Csound({ audioContext: getAudioContext() });
_csound.removeAllListeners('message');
['message'].forEach((k) => _csound.on(k, (...args) => eventLogger(k, args)));
await _csound.setOption('-m0d'); // see -m flag https://csound.com/docs/manual/CommandFlags.html
await _csound.setOption('--sample-accurate');
await _csound.compileCsdText(csd);
// await _csound.compileOrc(livecodeOrc);
await _csound.compileOrc(presetsOrc);
await _csound.start();
return _csound;
}
_csound.removeAllListeners('message');
['message'].forEach((k) => _csound.on(k, (...args) => eventLogger(k, args)));
await _csound.setOption('-m0d'); // see -m flag https://csound.com/docs/manual/CommandFlags.html
await _csound.setOption('--sample-accurate');
await _csound.compileCsdText(csd);
// await _csound.compileOrc(livecodeOrc);
await _csound.compileOrc(presetsOrc);
await _csound.start();
return _csound;
}
async function init() {
@ -118,3 +122,49 @@ export async function loadOrc(url) {
}
await orcCache[url];
}
/**
* Sends notes to Csound for rendering with MIDI semantics. The hap value is
* translated to these Csound pfields:
*
* p1 -- Csound instrument either as a number (1-based, can be a fraction),
* or as a string name.
* p2 -- time in beats (usually seconds) from start of performance.
* p3 -- duration in beats (usually seconds).
* p4 -- MIDI key number (as a real number, not an integer but in [0, 127].
* p5 -- MIDI velocity (as a real number, not an integer but in [0, 127].
* p6 -- Strudel controls, as a string.
*/
export const csoundm = register('csoundm', (instrument, pat) => {
let p1 = instrument;
if (typeof instrument === 'string') {
p1 = `"{instrument}"`;
}
init(); // not async to support csound inside other patterns + to be able to call pattern methods after it
return pat.onTrigger((tidal_time, hap) => {
if (!_csound) {
logger('[csound] not loaded yet', 'warning');
return;
}
if (typeof hap.value !== 'object') {
throw new Error('csound only support objects as hap values');
}
// Time in seconds counting from now.
const p2 = tidal_time - getAudioContext().currentTime;
const p3 = hap.duration.valueOf() + 0;
const frequency = getFrequency(hap);
// Translate frequency to MIDI key number _without_ rounding.
const C4 = 261.62558;
let octave = Math.log(frequency / C4) / Math.log(2.0) + 8.0;
const p4 = octave * 12.0 - 36.0;
// We prefer floating point precision, but over the MIDI range [0, 127].
const p5 = 127. * (hap.context?.velocity ?? 0.9);
// The Strudel controls as a string.
const p6 = Object.entries({ ...hap.value, frequency })
.flat()
.join('/');
const i_statement = `i ${p1} ${p2} ${p3} ${p4} ${p5} "${p6}"`;
console.log("[csoundm]:", i_statement)
_csound.inputMessage(i_statement);
});
});