Better code quality

public/worklets/bytebeat-processor.js

@@ -0,0 +1,85 @@
+class BytebeatProcessor extends AudioWorkletProcessor {
+  constructor() {
+    super()
+
+    this.t = 0
+    this.a = 8
+    this.b = 16
+    this.c = 32
+    this.d = 64
+    this.formula = null
+    this.compiledFormula = null
+    this.sampleRate = 8000
+    this.duration = 4
+    this.loopLength = this.sampleRate * this.duration
+    this.error = false
+
+    this.port.onmessage = (event) => {
+      const { type, value } = event.data
+      switch (type) {
+        case 'formula':
+          this.setFormula(value)
+          break
+        case 'variables':
+          this.a = value.a ?? this.a
+          this.b = value.b ?? this.b
+          this.c = value.c ?? this.c
+          this.d = value.d ?? this.d
+          break
+        case 'reset':
+          this.t = 0
+          break
+        case 'loopLength':
+          this.loopLength = value
+          break
+      }
+    }
+  }
+
+  setFormula(formulaString) {
+    try {
+      this.compiledFormula = new Function('t', 'a', 'b', 'c', 'd', `return ${formulaString}`)
+      this.formula = formulaString
+      this.error = false
+    } catch (e) {
+      console.error('Failed to compile bytebeat formula:', e)
+      this.error = true
+      this.compiledFormula = null
+    }
+  }
+
+  process(inputs, outputs) {
+    const output = outputs[0]
+
+    if (output.length > 0) {
+      const outputChannel = output[0]
+
+      for (let i = 0; i < outputChannel.length; i++) {
+        if (!this.compiledFormula || this.error) {
+          outputChannel[i] = 0
+        } else {
+          try {
+            const value = this.compiledFormula(this.t, this.a, this.b, this.c, this.d)
+            const byteValue = value & 0xFF
+            outputChannel[i] = (byteValue - 128) / 128
+          } catch (e) {
+            outputChannel[i] = 0
+            if (!this.error) {
+              console.error('Bytebeat runtime error:', e)
+              this.error = true
+            }
+          }
+        }
+
+        this.t++
+        if (this.loopLength > 0 && this.t >= this.loopLength) {
+          this.t = 0
+        }
+      }
+    }
+
+    return true
+  }
+}
+
+registerProcessor('bytebeat-processor', BytebeatProcessor)