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Tweak cc init

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This commit is contained in:
Nick Matantsev 2025-12-25 18:46:39 -05:00
parent 47557cf06f
commit 1860d31624
1 changed files with 15 additions and 11 deletions
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26
packages/midi/midi.mjs
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@ -497,20 +497,24 @@ class MidiInput {
this._refs = {}; this._refs = {};
this._refsByChan = {}; this._refsByChan = {};
this.cc = (cc, chan) => {
const initialState = this._loadState(chan);
const initialValue = initialState[cc] || 0;
if (chan !== undefined) {
return ref(() => this._refsByChan[cc]?.[chan] || initialValue);
}
return ref(() => this._refs[cc] || initialValue);
};
const midiListener = this._onMidiMessage.bind(this); const midiListener = this._onMidiMessage.bind(this);
device.addListener('midimessage', midiListener); device.addListener('midimessage', midiListener);
} }
createCC(cc, chan) {
if (chan !== undefined && !(chan in this._refsByChan)) {
this._refsByChan[chan] = {};
}
const lookupMap = chan === undefined ? this._refs : this._refsByChan[chan];
if (!(cc in lookupMap)) {
const initialState = this._loadState(chan);
lookupMap[cc] = initialState[cc] || 0;
}
return ref(() => lookupMap[cc]);
}
_onMidiMessage(e) { _onMidiMessage(e) {
const ccNum = e.dataBytes[0]; const ccNum = e.dataBytes[0];
const v = e.dataBytes[1]; const v = e.dataBytes[1];
@ -593,5 +597,5 @@ export async function midin(input) {
); );
} }
return instance.cc; return instance.createCC.bind(instance);
} }