Initial commit

common/src/commonMain/kotlin/nl/astraeus/vst/Note.kt

@@ -0,0 +1,186 @@
+package nl.astraeus.vst
+
+import kotlin.math.max
+import kotlin.math.min
+import kotlin.math.pow
+
+/**
+ * User: rnentjes
+ * Date: 14-11-15
+ * Time: 11:50
+ */
+
+enum class Note(
+  val sharp: String,
+  val flat: String
+) {
+  NONE("---", "---"),
+  NO02("",""),
+  NO03("",""),
+  NO04("",""),
+  NO05("",""),
+  NO06("",""),
+  NO07("",""),
+  NO08("",""),
+  NO09("",""),
+  NO10("",""),
+  NO11("",""),
+  NO12("",""),
+  C0("C-0","C-0"),
+  C0s("C#0","Db0"),
+  D0("D-0","D-0"),
+  D0s("D#0","Eb0"),
+  E0("E-0","E-0"),
+  F0("F-0","F-0"),
+  F0s("F#0","Gb0"),
+  G0("G-0","G-0"),
+  G0s("G#0","Ab0"),
+  A0("A-0","A-0"),
+  A0s("A#0","Bb0"),
+  B0("B-0","B-0"),
+  C1("C-1","C-1"),
+  C1s("C#1","Db1"),
+  D1("D-1","D-1"),
+  D1s("D#1","Eb1"),
+  E1("E-1","E-1"),
+  F1("F-1","F-1"),
+  F1s("F#1","Gb1"),
+  G1("G-1","G-1"),
+  G1s("G#1","Ab1"),
+  A1("A-1","A-1"),
+  A1s("A#1","Bb1"),
+  B1("B-1","B-1"),
+  C2("C-2","C-2"),
+  C2s("C#2","Db2"),
+  D2("D-2","D-2"),
+  D2s("D#2","Eb2"),
+  E2("E-2","E-2"),
+  F2("F-2","F-2"),
+  F2s("F#2","Gb2"),
+  G2("G-2","G-2"),
+  G2s("G#2","Ab2"),
+  A2("A-2","A-2"),
+  A2s("A#2","Bb2"),
+  B2("B-2","B-2"),
+  C3("C-3","C-3"),
+  C3s("C#3","Db3"),
+  D3("D-3","D-3"),
+  D3s("D#3","Eb3"),
+  E3("E-3","E-3"),
+  F3("F-3","F-3"),
+  F3s("F#3","Gb3"),
+  G3("G-3","G-3"),
+  G3s("G#3","Ab3"),
+  A3("A-3","A-3"),
+  A3s("A#3","Bb3"),
+  B3("B-3","B-3"),
+  C4("C-4","C-4"),
+  C4s("C#4","Db4"),
+  D4("D-4","D-4"),
+  D4s("D#4","Eb4"),
+  E4("E-4","E-4"),
+  F4("F-4","F-4"),
+  F4s("F#4","Gb4"),
+  G4("G-4","G-4"),
+  G4s("G#4","Ab4"),
+  A4("A-4","A-4"),
+  A4s("A#4","Bb4"),
+  B4("B-4","B-4"),
+  C5("C-5","C-5"),
+  C5s("C#5","Db5"),
+  D5("D-5","D-5"),
+  D5s("D#5","Eb5"),
+  E5("E-5","E-5"),
+  F5("F-5","F-5"),
+  F5s("F#5","Gb5"),
+  G5("G-5","G-5"),
+  G5s("G#5","Ab5"),
+  A5("A-5","A-5"),
+  A5s("A#5","Bb5"),
+  B5("B-5","B-5"),
+  C6("C-6","C-6"),
+  C6s("C#6","Db6"),
+  D6("D-6","D-6"),
+  D6s("D#6","Eb6"),
+  E6("E-6","E-6"),
+  F6("F-6","F-6"),
+  F6s("F#6","Gb6"),
+  G6("G-6","G-6"),
+  G6s("G#6","Ab6"),
+  A6("A-6","A-6"),
+  A6s("A#6","Bb6"),
+  B6("B-6","B-6"),
+  C7("C-7","C-7"),
+  C7s("C#7","Db7"),
+  D7("D-7","D-7"),
+  D7s("D#7","Eb7"),
+  E7("E-7","E-7"),
+  F7("F-7","F-7"),
+  F7s("F#7","Gb7"),
+  G7("G-7","G-7"),
+  G7s("G#7","Ab7"),
+  A7("A-7","A-7"),
+  A7s("A#7","Bb7"),
+  B7("B-7","B-7"),
+  C8("C-8","C-8"),
+  C8s("C#8","Db8"),
+  D8("D-8","D-8"),
+  D8s("D#8","Eb8"),
+  E8("E-8","E-8"),
+  F8("F-8","F-8"),
+  F8s("F#8","Gb8"),
+  G8("G-8","G-8"),
+  G8s("G#8","Ab8"),
+  A8("A-8","A-8"),
+  A8s("A#8","Bb8"),
+  B8("B-8","B-8"),
+  C9("C-9","C-9"),
+  C9s("C#9","Db9"),
+  D9("D-9","D-9"),
+  D9s("D#9","Eb9"),
+  E9("E-9","E-9"),
+  F9("F-9","F-9"),
+  F9s("F#9","Gb9"),
+  G9("G-9","G-9"),
+  // out of midi range
+  //G9s("G#9","Ab9"),
+  //A9("A-9","A-9"),
+  //A9s("A#9","Bb9"),
+  //B9("B-9","B-9"),
+  UP("^^^","^^^"),
+  END("XXX","XXX"),
+  ;
+
+  // 69 = A4.ordinal
+  val freq: Double = 440.0 * 2.0.pow((ordinal - 69)/12.0)
+  val cycleLength: Double = 1.0 / freq
+  var sampleDelta: Double = 0.0
+
+  fun transpose(semiNotes: Int): Note = if (ordinal >= C0.ordinal && ordinal <= G9.ordinal) {
+    var result = this.ordinal + semiNotes
+
+    result = min(result, G9.ordinal)
+    result = max(result, C0.ordinal)
+
+    entries.firstOrNull { it.ordinal == result } ?: this
+  } else {
+    this
+  }
+
+  companion object {
+    var sampleRate: Int = 44100
+
+    fun fromMidi(midi: Int): Note {
+      // todo: add check
+      return entries[midi]
+    }
+
+    fun updateSampleRate(rate: Int) {
+      println("Setting sample rate to $rate")
+      sampleRate = rate
+      for (note in Note.entries) {
+        note.sampleDelta = (1.0 / sampleRate.toDouble()) / note.cycleLength
+      }
+    }
+  }
+}