From 4d7b29a27073c1cf2ece31898962aa24648c26a2 Mon Sep 17 00:00:00 2001
From: rnentjes <info@nentjes.com>
Date: Tue, 21 Feb 2023 21:11:35 +0100
Subject: [PATCH] Simpler sound example

---
 .../kotlin/WorkletProcessor.kt                | 114 +++---------------
 1 file changed, 18 insertions(+), 96 deletions(-)

diff --git a/src/jsAudioWorkletMain/kotlin/WorkletProcessor.kt b/src/jsAudioWorkletMain/kotlin/WorkletProcessor.kt
index f07319f..82448b9 100644
--- a/src/jsAudioWorkletMain/kotlin/WorkletProcessor.kt
+++ b/src/jsAudioWorkletMain/kotlin/WorkletProcessor.kt
@@ -1,7 +1,6 @@
 @file:OptIn(ExperimentalJsExport::class)
 
 import org.khronos.webgl.Float64Array
-import org.khronos.webgl.get
 import org.khronos.webgl.set
 import org.w3c.dom.MessageEvent
 import org.w3c.dom.MessagePort
@@ -13,19 +12,9 @@ import kotlin.math.sin
 object WorkletProcessor {
   var port: MessagePort? = null
 
-  var offsets = Array(5) { 0.0 }
   var counter: Int = 0
-  var baseNote = Note.C2
-  val CARRAY = arrayOf(
-    Note.C1,
-    Note.C2,
-    Note.C3,
-    Note.C4,
-    Note.C5,
-    Note.C6,
-    Note.C7,
-    Note.C8,
-  )
+  var note = Note.C2
+  var offset = 0.0
 
   @JsName("setPort")
   fun setPort(port: MessagePort) {
@@ -53,96 +42,29 @@ object WorkletProcessor {
 
   @JsName("process")
   fun process(samples: Int, left: Float64Array, right: Float64Array) {
-    var first = true
-    for (index in offsets.indices) {
-      var offset = offsets[index]
-      var tmpCounter = counter
-      var offsetNote = baseNote.transpose(index * 12)
-      var delta = offsetNote.sampleDelta
-
-      for (sample in 0 until samples) {
-        var value = sin(offset * 2 * PI)
-        offset += delta
-
-        val noteProgress = tmpCounter % 5000
-        if (noteProgress == 0) {
-          offsetNote = offsetNote.transpose(1)
-          if (offsetNote in CARRAY) {
-            offsetNote = offsetNote.transpose(-12)
-          }
-          delta = offsetNote.sampleDelta
-        }
-        value *= (1.0 - noteProgress / 5000.0)
-
-        if (first) {
-          left[sample] = value
-          right[sample] = value
-        } else {
-          left[sample] = left[sample] + value
-          right[sample] = right[sample] + value
-        }
-        tmpCounter++
-      }
-
-      offsets[index] = offset
-      first = false
-    }
-
     var tmpCounter = counter
+    var delta = note.sampleDelta
+
     for (sample in 0 until samples) {
-      if (tmpCounter % 5000 == 0) {
-        baseNote = baseNote.transpose(1)
-        if (baseNote in CARRAY) {
-          baseNote = baseNote.transpose(-12)
+      var value = sin(offset * 2 * PI)
+      offset += delta
+
+      val noteProgress = tmpCounter % 5000
+      if (noteProgress == 0) {
+        note = note.transpose(1)
+        if (note == Note.C7) {
+          note = Note.C2
         }
+        delta = note.sampleDelta
       }
+      value *= (1.0 - noteProgress / 5000.0)
+
+      left[sample] = value
+      right[sample] = value
       tmpCounter++
     }
+
     counter += samples
-
-    val nrOffsets = offsets.size
-    for (sample in 0 until samples) {
-      left[sample] = left[sample] / nrOffsets
-      right[sample] = right[sample] / nrOffsets
-    }
-
-    /*    for (sample in 0 until samples) {
-          val noteProgress = counter % 5000
-          if (noteProgress == 0) {
-            baseNote = baseNote.transpose(1)
-            if (baseNote == Note.C3s) {
-              baseNote = Note.C2
-            }
-          }
-          var value = 0.0
-          var volumeAdjust = (Note.C3.ordinal - baseNote.ordinal) / 12.0
-          for (index in 0 until offsets.size) {
-            offsets[index] = (offsets[index] + (baseNote.transpose(index * 12).sampleDelta)) % 1.0
-
-            var partValue = sin(offsets[index] * 2 * PI)
-            if (index == 0) {
-              partValue *= volumeAdjust
-            } else if (index == offsets.size - 1) {
-              partValue *= (1.0 - volumeAdjust)
-            }
-
-            value += partValue
-
-          }
-
-          value /= offsets.size
-          // simple amplitude
-          value *= if (noteProgress < 0.1) {
-            (noteProgress / 500.0)
-          } else {
-            (1.0 - (noteProgress - 0.1) / 4500.0)
-          }
-
-          left[sample] = value
-          right[sample] = value
-
-          counter++
-        }*/
   }
 
 }