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midi mapping to handle program change and sysex

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nkymut 2025-01-14 17:11:14 +08:00
parent 859f153ec6
commit c242f5f625
1 changed files with 26 additions and 8 deletions
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34
packages/midi/midi.mjs
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@ -151,18 +151,36 @@ Pattern.prototype.midi = function (output) {
// Handle mapped parameters if mapping exists
if (mapping) {
Object.entries(mapping).forEach(([name, paramSpec]) => {
if (name in hap.value && typeof hap.value[name] === 'number') {
if (name in hap.value) {
const value = hap.value[name];
// ccnLsb will only exist if this is a high-resolution CC message
const [ccnMsb, ccnLsb] = Array.isArray(paramSpec.cc) ? paramSpec.cc : [paramSpec.cc];
if (paramSpec.cc) {
if (typeof value !== 'number') {
throw new Error(`Expected ${name} to be a number for CC mapping`);
}
// ccnLsb will only exist if this is a high-resolution CC message
const [ccnMsb, ccnLsb] = Array.isArray(paramSpec.cc) ? paramSpec.cc : [paramSpec.cc];
const ccvMsb = ccnLsb === undefined ? Math.round(value * 127) : Math.round(value * 16383) >> 7;
device.sendControlChange(ccnMsb, ccvMsb, paramSpec.channel || midichan, { time: timeOffsetString });
const ccvMsb = ccnLsb === undefined ? Math.round(value * 127) : Math.round(value * 16383) >> 7;
device.sendControlChange(ccnMsb, ccvMsb, paramSpec.channel || midichan, { time: timeOffsetString });
if (ccnLsb !== undefined) {
const ccvLsb = Math.round(value * 16383) & 0b1111111;
device.sendControlChange(ccnLsb, ccvLsb, paramSpec.channel || midichan, { time: timeOffsetString });
if (ccnLsb !== undefined) {
const ccvLsb = Math.round(value * 16383) & 0b1111111;
device.sendControlChange(ccnLsb, ccvLsb, paramSpec.channel || midichan, { time: timeOffsetString });
}
} else if (paramSpec.pc !== undefined) {
if (typeof value !== 'number' || value < 0 || value > 127) {
throw new Error(`Expected ${name} to be a number between 0 and 127 for program change`);
}
device.sendProgramChange(value, paramSpec.channel || midichan, { time: timeOffsetString });
} else if (paramSpec.sysex) {
if (!Array.isArray(value)) {
throw new Error(`Expected ${name} to be an array of numbers (0-255) for sysex`);
}
if (!value.every((byte) => Number.isInteger(byte) && byte >= 0 && byte <= 255)) {
throw new Error(`All sysex bytes in ${name} must be integers between 0 and 255`);
}
device.sendSysex(undefined, value, { time: timeOffsetString });
}
}
});