csound-wasm/src/modules/rtmidi.js

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import { range } from 'ramda';
import { CS_MIDIDEVICE } from '@root/structures';
import {
  freeStringPtr,
  sizeofStruct,
  structBuffer2Object,
  trimNull,
  uint2String,
} from '@root/utils';

export const csoundSetMidiCallbacks = wasm => csound => {
  wasm.exports.csoundSetMidiCallbacks(csound);
};

// eslint-disable-next-line unicorn/prevent-abbreviations
export const csoundGetMIDIDevList = wasm => (csound, isOutput) => {
  const { buffer } = wasm.exports.memory;
  const numberOfDevices = wasm.exports.csoundGetMIDIDevList(csound, undefined, isOutput ? 1 : 0);
  if (numberOfDevices === 0) return [];
  const structLength = sizeofStruct(CS_MIDIDEVICE);
  const structOffset = wasm.exports.allocCsMidiDeviceStruct(numberOfDevices);
  wasm.exports.csoundGetMIDIDevList(csound, structOffset, isOutput ? 1 : 0);
  const structBuffer = new Uint8Array(buffer, structOffset, structLength * numberOfDevices);
  const out = range(0, numberOfDevices).map(i =>
    structBuffer2Object(CS_MIDIDEVICE, structBuffer.subarray(i * structLength, structLength))
  );
  wasm.exports.freeCsMidiDeviceStruct(structOffset);
  return out;
};

export const csoundGetRtMidiName = wasm => csound => {
  const { buffer } = wasm.exports.memory;
  const ptr = wasm.exports.getRtMidiName(csound);
  const stringBuffer = new Uint8Array(buffer, ptr, 128);
  return trimNull(uint2String(stringBuffer)) || '';
};

export const csoundGetMidiOutFileName = wasm => csound => {
  const { buffer } = wasm.exports.memory;
  const ptr = wasm.exports.getMidiOutFileName(csound);
  const stringBuffer = new Uint8Array(buffer, ptr, 128);
  ptr && ptr.length > 0 && freeStringPtr(ptr);
  return trimNull(uint2String(stringBuffer)) || '';
};

export const _isRequestingRtMidiInput = wasm => csound => {
  return wasm.exports.isRequestingRtMidiInput(csound);
};

export const csoundPushMidiMessage = wasm => (csound, status, data1, data2) => {
  return wasm.exports.pushMidiMessage(csound, status, data1, data2);
};

// PUBLIC void 	csoundSetMIDIModule (CSOUND *csound, const char *module)
// PUBLIC void 	csoundSetHostImplementedMIDIIO (CSOUND *csound, int state)
// PUBLIC int 	csoundGetMIDIDevList (CSOUND *csound, CS_MIDIDEVICE *list, int isOutput)
// PUBLIC void 	csoundSetExternalMidiInOpenCallback (CSOUND *, int(*func)(CSOUND *, void **userData, const char *devName))
// PUBLIC void 	csoundSetExternalMidiReadCallback (CSOUND *, int(*func)(CSOUND *, void *userData, unsigned char *buf, int nBytes))
// PUBLIC void 	csoundSetExternalMidiInCloseCallback (CSOUND *, int(*func)(CSOUND *, void *userData))
// PUBLIC void 	csoundSetExternalMidiOutOpenCallback (CSOUND *, int(*func)(CSOUND *, void **userData, const char *devName))
// PUBLIC void 	csoundSetExternalMidiWriteCallback (CSOUND *, int(*func)(CSOUND *, void *userData, const unsigned char *buf, int nBytes))
// PUBLIC void 	csoundSetExternalMidiOutCloseCallback (CSOUND *, int(*func)(CSOUND *, void *userData))
// PUBLIC void 	csoundSetExternalMidiErrorStringCallback (CSOUND *, const char *(*func)(int))
// PUBLIC void 	csoundSetMIDIDeviceListCallback (CSOUND *csound, int(*mididevlist__)(CSOUND *, CS_MIDIDEVICE *list, int isOutput))