adding stuff and cleaning stuff

2023-07-29 00:03:19 +02:00
parent 6f77cdf9a0
commit 1096414625
5 changed files with 191 additions and 219 deletions
--- a/src/IO/MidiConnection.ts
+++ b/src/IO/MidiConnection.ts
@ -0,0 +1,105 @@
+export class MidiConnection{
+    private midiAccess: MIDIAccess | null = null;
+    private midiOutputs: MIDIOutput[] = [];
+    private currentOutputIndex: number = 0;
+    private scheduledNotes: { [noteNumber: number]: number } = {}; // { noteNumber: timeoutId }
+  
+    constructor() {
+      this.initializeMidiAccess();
+    }
+  
+    private async initializeMidiAccess(): Promise<void> {
+      try {
+        this.midiAccess = await navigator.requestMIDIAccess();
+        this.midiOutputs = Array.from(this.midiAccess.outputs.values());
+        if (this.midiOutputs.length === 0) {
+          console.warn('No MIDI outputs available.');
+        }
+      } catch (error) {
+        console.error('Failed to initialize MIDI:', error);
+      }
+    }
+ 
+    public getCurrentMidiPort(): string | null {
+        if (this.midiOutputs.length > 0 && this.currentOutputIndex >= 0 && this.currentOutputIndex < this.midiOutputs.length) {
+            return this.midiOutputs[this.currentOutputIndex].name;
+        } else {
+            console.error('No MIDI output selected or available.');
+            return null;
+        }
+    }
+
+
+    public sendMidiClock(): void {
+      const output = this.midiOutputs[this.currentOutputIndex];
+      if (output) {
+        output.send([0xF8]); // Send a single MIDI clock message
+      } else {
+        console.error('MIDI output not available.');
+      }
+    }
+  
+    
+    public switchMidiOutput(outputName: string): boolean {
+      const index = this.midiOutputs.findIndex((output) => output.name === outputName);
+      if (index !== -1) {
+        this.currentOutputIndex = index;
+        return true;
+      } else {
+        console.error(`MIDI output "${outputName}" not found.`);
+        return false;
+      }
+    }
+  
+    public listMidiOutputs(): void {
+      console.log('Available MIDI Outputs:');
+      this.midiOutputs.forEach((output, index) => {
+        console.log(`${index + 1}. ${output.name}`);
+      });
+    }
+  
+    public sendMidiNote(noteNumber: number, velocity: number, durationMs: number): void {
+      const output = this.midiOutputs[this.currentOutputIndex];
+      if (output) {
+        const noteOnMessage = [0x90, noteNumber, velocity]; 
+        const noteOffMessage = [0x80, noteNumber, 0];
+  
+        // Send Note On
+        output.send(noteOnMessage);
+  
+        // Schedule Note Off
+        const timeoutId = setTimeout(() => {
+          output.send(noteOffMessage);
+          delete this.scheduledNotes[noteNumber];
+        }, durationMs);
+  
+        this.scheduledNotes[noteNumber] = timeoutId;
+      } else {
+        console.error('MIDI output not available.');
+      }
+    }
+  
+    public sendMidiControlChange(controlNumber: number, value: number): void {
+      const output = this.midiOutputs[this.currentOutputIndex];
+      if (output) {
+        output.send([0xB0, controlNumber, value]); // Control Change
+      } else {
+        console.error('MIDI output not available.');
+      }
+    }
+  
+    public panic(): void {
+      const output = this.midiOutputs[this.currentOutputIndex];
+      if (output) {
+        for (const noteNumber in this.scheduledNotes) {
+          const timeoutId = this.scheduledNotes[noteNumber];
+          clearTimeout(timeoutId);
+          output.send([0x80, parseInt(noteNumber), 0]); // Note Off
+        }
+        this.scheduledNotes = {};
+      } else {
+        console.error('MIDI output not available.');
+      }
+    }
+  }
+