From 5774cc586faf26e0e250d63680a2f89360e66b96 Mon Sep 17 00:00:00 2001
From: Kelvin Sherlock <ksherlock@gmail.com>
Date: Fri, 15 Oct 2021 20:14:35 -0400
Subject: [PATCH] compiled web page

---
 js/application.js | 491 ++++++++++++++++++++++++++++++++++++++++++++++
 js/preact.min.js  |   2 +
 2 files changed, 493 insertions(+)
 create mode 100644 js/application.js
 create mode 100644 js/preact.min.js

diff --git a/js/application.js b/js/application.js
new file mode 100644
index 0000000..280d1c7
--- /dev/null
+++ b/js/application.js
@@ -0,0 +1,491 @@
+// src/utils.js
+function calc_sr(osc) {
+  return 28636360 / 32 / (osc + 2);
+}
+function calc_shift(res, ws) {
+  return res + 9 - ws;
+}
+function log2(x) {
+  var y = Math.log2(x);
+  return y >> 0 === y ? y : false;
+}
+
+// src/note_input.jsx
+var _notes = ["C", "C#", "D", "D#", "E", "F", "F#", "G", "G#", "A", "A#", "B"];
+function split_value(value) {
+  return [value % 12, value / 12 >> 0];
+}
+function NoteFrequency(value) {
+  var [note, octave] = split_value(value);
+  var n = (note + 3) % 12;
+  if (n >= 3)
+    octave -= 1;
+  var base = 27.5 * 2 ** octave;
+  return base * 2 ** (n / 12);
+}
+var NoteInput = class extends preact.Component {
+  constructor(props) {
+    super(props);
+    this._noteChange = this.noteChange.bind(this);
+    this._octaveChange = this.octaveChange.bind(this);
+  }
+  noteChange(e) {
+    e.preventDefault();
+    var [note, octave] = split_value(this.props.value);
+    note = +e.target.value;
+    this.change(note, octave);
+  }
+  octaveChange(e) {
+    e.preventDefault();
+    var [note, octave] = split_value(this.props.value);
+    octave = +e.target.value;
+    this.change(note, octave);
+  }
+  change(note, octave) {
+    var { onChange } = this.props;
+    if (onChange) {
+      var value = note + 12 * octave;
+      onChange(value);
+    }
+  }
+  render() {
+    var { onChange, value } = this.props;
+    var notes = _notes.map((x, ix) => {
+      return /* @__PURE__ */ preact.h("option", {
+        key: ix,
+        value: ix
+      }, x);
+    });
+    var octaves = [];
+    for (var i = 0; i < 9; ++i) {
+      octaves.push(/* @__PURE__ */ preact.h("option", {
+        key: i,
+        value: i
+      }, i));
+    }
+    var [note, octave] = split_value(value);
+    return /* @__PURE__ */ preact.h(preact.Fragment, null, /* @__PURE__ */ preact.h("select", {
+      onChange: this._noteChange,
+      value: note
+    }, notes), " ", /* @__PURE__ */ preact.h("select", {
+      onChange: this._octaveChange,
+      value: octave
+    }, octaves), " ", NoteFrequency(value).toFixed(2), " Hz");
+  }
+};
+
+// src/wave_data.jsx
+function mod(a, b) {
+  return (a % b + b) % b;
+}
+function sine() {
+  const a = 127;
+  const p = 256;
+  var rv = [];
+  for (var n = 0; n < 256; ++n) {
+    var x = 128 + Math.round(a * Math.sin(n * Math.PI / 128));
+    rv.push(x || 1);
+  }
+  return rv;
+}
+function square() {
+  var rv = [];
+  for (var n = 0; n < 128; ++n)
+    rv.push(255);
+  for (var n = 0; n < 128; ++n)
+    rv.push(1);
+  return rv;
+}
+function triangle() {
+  var rv = [];
+  const a = 127;
+  const p = 256;
+  for (var n = 0; n < 256; ++n) {
+    var x = 128 + Math.round(4 * a / p * Math.abs(mod(n - p / 4, p) - p / 2)) - a;
+    rv.push(x || 1);
+  }
+  return rv;
+}
+function sawtooth() {
+  var rv = [];
+  const a = 127;
+  const p = 256;
+  for (var n = 0; n < 256; ++n) {
+    var x = 128 + Math.round(a * 2 * (n / p - Math.floor(0.5 + n / p)));
+    rv.push(x || 1);
+  }
+  return rv;
+}
+function WaveData(props) {
+  var { assembler, shape } = props;
+  var data;
+  switch (shape) {
+    case 0:
+      data = sine();
+      break;
+    case 1:
+      data = square();
+      break;
+    case 2:
+      data = triangle();
+      break;
+    case 3:
+      data = sawtooth();
+      break;
+  }
+  var hex = data.map((x) => x < 16 ? "0" + x.toString(16) : x.toString(16));
+  var code = [];
+  if (assembler == 0) {
+    for (var n = 0; n < 16; ++n) {
+      var line = "    hex " + hex.slice(n * 16, n * 16 + 16).join("") + "\n";
+      code.push(line);
+    }
+  }
+  if (assembler == 1) {
+    for (var n = 0; n < 16; ++n) {
+      var line = "    dc h'" + hex.slice(n * 16, n * 16 + 16).join("") + "'\n";
+      code.push(line);
+    }
+  }
+  if (assembler == 2) {
+    for (var n = 0; n < 32; ++n) {
+      var line = "    dc.b $" + hex.slice(n * 8, n * 8 + 8).join(",$") + "\n";
+      code.push(line);
+    }
+  }
+  return /* @__PURE__ */ preact.h("code", null, /* @__PURE__ */ preact.h("pre", null, code));
+}
+
+// src/input.jsx
+var _onames = [];
+function Oscillators(props) {
+  if (!_onames.length) {
+    for (var i = 1; i < 33; ++i) {
+      var x = (calc_sr(i) / 1e3).toFixed(2) + " kHz";
+      _onames.push(x);
+    }
+  }
+  var options = _onames.map((x2, ix) => {
+    var i2 = ix + 1;
+    return /* @__PURE__ */ preact.h("option", {
+      value: i2,
+      key: i2
+    }, i2, " \u2013 ", x2);
+  });
+  return /* @__PURE__ */ preact.h("select", {
+    value: props.value,
+    onChange: props.onChange
+  }, options);
+}
+function WaveSize(props) {
+  var options = [];
+  for (var i = 8; i < 16; ++i) {
+    var ext = 1 << i;
+    var int = i - 8;
+    options.push(/* @__PURE__ */ preact.h("option", {
+      value: int,
+      key: int
+    }, ext));
+  }
+  return /* @__PURE__ */ preact.h("select", {
+    value: props.value,
+    onChange: props.onChange
+  }, options);
+}
+function Resolution(props) {
+  var options = [];
+  for (var i = 0; i < 8; ++i) {
+    options.push(/* @__PURE__ */ preact.h("option", {
+      value: i,
+      key: i
+    }, i));
+  }
+  return /* @__PURE__ */ preact.h("select", {
+    value: props.value,
+    onChange: props.onChange
+  }, options);
+}
+function Frequency(props) {
+  return /* @__PURE__ */ preact.h("input", {
+    type: "number",
+    min: "0",
+    max: "65535",
+    value: props.value,
+    onChange: props.onChange
+  });
+}
+function Assembler(props) {
+  var options = ["Merlin", "ORCA/M", "MPW"].map((o, ix) => {
+    return /* @__PURE__ */ preact.h("option", {
+      key: ix,
+      value: ix
+    }, o);
+  });
+  return /* @__PURE__ */ preact.h("select", {
+    ...props
+  }, options);
+}
+function WaveShape(props) {
+  var options = ["Sine", "Square", "Triangle", "Sawtooth"].map((o, ix) => {
+    return /* @__PURE__ */ preact.h("option", {
+      key: ix,
+      value: ix
+    }, o);
+  });
+  return /* @__PURE__ */ preact.h("select", {
+    ...props
+  }, options);
+}
+
+// src/application.jsx
+function nmultiply(x) {
+  if (x == 0)
+    return 0;
+  if (x == 1)
+    return /* @__PURE__ */ preact.h("i", null, "n");
+  return /* @__PURE__ */ preact.h(preact.Fragment, null, x, " * ", /* @__PURE__ */ preact.h("i", null, "n"));
+}
+function simplify(res, freq) {
+  while (res && !(freq & 1)) {
+    freq >>= 1;
+    --res;
+  }
+  return [res, freq];
+}
+function SampleDisplay(props) {
+  var { shift, freq } = props;
+  var freq2 = log2(freq);
+  var fspan = /* @__PURE__ */ preact.h("span", {
+    title: "Frequency"
+  }, freq);
+  var rv = [];
+  rv.push(/* @__PURE__ */ preact.h("div", null, "Sample", /* @__PURE__ */ preact.h("sub", null, "n"), " = RAM[ (", fspan, " * ", /* @__PURE__ */ preact.h("i", null, "n"), ") >> ", shift, " ]"));
+  rv.push(/* @__PURE__ */ preact.h("div", null, "Sample", /* @__PURE__ */ preact.h("sub", null, "n"), " = RAM[ (", fspan, " * ", /* @__PURE__ */ preact.h("i", null, "n"), ") / ", 1 << shift, " ]"));
+  if (freq2) {
+    if (freq2 >= shift) {
+      rv.push(/* @__PURE__ */ preact.h("div", null, "Sample", /* @__PURE__ */ preact.h("sub", null, "n"), " = RAM[ ", nmultiply(freq / (1 << shift)), " ]"));
+    } else {
+      rv.push(/* @__PURE__ */ preact.h("div", null, "Sample", /* @__PURE__ */ preact.h("sub", null, "n"), " = RAM[ ", nmultiply(freq >> freq2), " >> ", shift - freq2, " ]"));
+      rv.push(/* @__PURE__ */ preact.h("div", null, "Sample", /* @__PURE__ */ preact.h("sub", null, "n"), " = RAM[ ", nmultiply(freq >> freq2), " / ", 1 << shift - freq2, " ]"));
+    }
+  }
+  return rv;
+}
+function NoteDisplay(props) {
+  var { osc, note } = props;
+  const wave = 0;
+  const sr = calc_sr(osc);
+  const note_frq = NoteFrequency(note);
+  const f = note_frq / (sr / (1 << 8 + wave));
+  var best_res = 0;
+  var best_freq = 0;
+  for (var res = 0; res < 8; ++res) {
+    var tmp = Math.round(f * (1 << calc_shift(res, wave)));
+    if (tmp >= 65536)
+      break;
+    best_res = res;
+    best_freq = tmp;
+  }
+  [best_res, best_freq] = simplify(best_res, best_freq);
+  return /* @__PURE__ */ preact.h(preact.Fragment, null, /* @__PURE__ */ preact.h("div", null, "Wave Size: 256"), /* @__PURE__ */ preact.h("div", null, "Resolution: ", best_res), /* @__PURE__ */ preact.h("div", null, "Frequency: ", best_freq));
+}
+function ResampleDisplay(props) {
+  var { osc, size, freq } = props;
+  const sr = calc_sr(osc);
+  const f = freq / sr;
+  var best_res = 0;
+  var best_freq = 0;
+  for (var res = 0; res < 8; ++res) {
+    var tmp = Math.round(f * (1 << calc_shift(res, size)));
+    if (tmp >= 65536)
+      break;
+    best_res = res;
+    best_freq = tmp;
+  }
+  [best_res, best_freq] = simplify(best_res, best_freq);
+  var best_shift = calc_shift(best_res, size);
+  return /* @__PURE__ */ preact.h(preact.Fragment, null, /* @__PURE__ */ preact.h("div", null, "Resolution: ", best_res), /* @__PURE__ */ preact.h("div", null, "Frequency: ", best_freq), /* @__PURE__ */ preact.h(SampleDisplay, {
+    freq: best_freq,
+    shift: best_shift
+  }));
+}
+var Application = class extends preact.Component {
+  constructor(props) {
+    super(props);
+    this._oscChange = this.oscChange.bind(this);
+    this._waveChange = this.waveChange.bind(this);
+    this._resChange = this.resChange.bind(this);
+    this._freqChange = this.freqChange.bind(this);
+    this._noteChange = this.noteChange.bind(this);
+    this._tabChange = this.tabChange.bind(this);
+    this._asmChange = this.asmChange.bind(this);
+    this._shapeChange = this.shapeChange.bind(this);
+    this._inFreqChange = this.inFreqChange.bind(this);
+    this._inSizeChange = this.inSizeChange.bind(this);
+    this.state = {
+      osc: 32,
+      wave: 0,
+      res: 0,
+      freq: 512,
+      tab: 0,
+      note: 4 * 12,
+      assembler: 0,
+      shape: 0,
+      in_freq: 44100,
+      in_size: 0
+    };
+  }
+  oscChange(e) {
+    e.preventDefault();
+    var v = +e.target.value || 0;
+    this.setState({ osc: v });
+  }
+  waveChange(e) {
+    e.preventDefault();
+    var v = +e.target.value || 0;
+    this.setState({ wave: v });
+  }
+  resChange(e) {
+    e.preventDefault();
+    var v = +e.target.value || 0;
+    this.setState({ res: v });
+  }
+  freqChange(e) {
+    e.preventDefault();
+    var v = +e.target.value >> 0;
+    if (v < 0)
+      v = 0;
+    if (v > 65535)
+      v = 65535;
+    this.setState({ freq: v });
+  }
+  inFreqChange(e) {
+    e.preventDefault();
+    var v = +e.target.value >> 0;
+    if (v < 0)
+      v = 0;
+    if (v > 65535)
+      v = 65535;
+    this.setState({ in_freq: v });
+  }
+  inSizeChange(e) {
+    e.preventDefault();
+    var v = +e.target.value || 0;
+    this.setState({ in_size: v });
+  }
+  tabChange(e) {
+    e.preventDefault();
+    var v = +e.target.value;
+    this.setState({ tab: v });
+  }
+  noteChange(v) {
+    this.setState({ note: v });
+  }
+  asmChange(e) {
+    e.preventDefault();
+    var v = +e.target.value;
+    this.setState({ assembler: v });
+  }
+  shapeChange(e) {
+    e.preventDefault();
+    var v = +e.target.value;
+    this.setState({ shape: v });
+  }
+  sampleChildren() {
+    var { osc, wave, res, freq } = this.state;
+    var shift = calc_shift(res, wave);
+    return /* @__PURE__ */ preact.h(preact.Fragment, null, /* @__PURE__ */ preact.h("div", null, /* @__PURE__ */ preact.h("label", null, "Oscillators"), " ", /* @__PURE__ */ preact.h(Oscillators, {
+      value: osc,
+      onChange: this._oscChange
+    })), /* @__PURE__ */ preact.h("div", null, /* @__PURE__ */ preact.h("label", null, "Wave Size"), " ", /* @__PURE__ */ preact.h(WaveSize, {
+      value: wave,
+      onChange: this._waveChange
+    })), /* @__PURE__ */ preact.h("div", null, /* @__PURE__ */ preact.h("label", null, "Resolution"), " ", /* @__PURE__ */ preact.h(Resolution, {
+      value: res,
+      onChange: this._resChange
+    })), /* @__PURE__ */ preact.h("div", null, /* @__PURE__ */ preact.h("label", null, "Frequency"), " ", /* @__PURE__ */ preact.h(Frequency, {
+      value: freq,
+      onChange: this._freqChange
+    })), /* @__PURE__ */ preact.h(SampleDisplay, {
+      freq,
+      shift
+    }));
+  }
+  noteChildren() {
+    var { osc, wave, note } = this.state;
+    return /* @__PURE__ */ preact.h(preact.Fragment, null, /* @__PURE__ */ preact.h("div", null, /* @__PURE__ */ preact.h("label", null, "Oscillators"), " ", /* @__PURE__ */ preact.h(Oscillators, {
+      value: osc,
+      onChange: this._oscChange
+    })), /* @__PURE__ */ preact.h("div", null, /* @__PURE__ */ preact.h("label", null, "Note"), " ", /* @__PURE__ */ preact.h(NoteInput, {
+      value: note,
+      onChange: this._noteChange
+    })), /* @__PURE__ */ preact.h(NoteDisplay, {
+      osc,
+      note,
+      wave
+    }));
+  }
+  waveChildren() {
+    var { assembler, shape } = this.state;
+    return /* @__PURE__ */ preact.h(preact.Fragment, null, /* @__PURE__ */ preact.h("div", null, /* @__PURE__ */ preact.h("label", null, "Assembler"), " ", /* @__PURE__ */ preact.h(Assembler, {
+      value: assembler,
+      onChange: this._asmChange
+    })), /* @__PURE__ */ preact.h("div", null, /* @__PURE__ */ preact.h("label", null, "Wave Type"), " ", /* @__PURE__ */ preact.h(WaveShape, {
+      value: shape,
+      onChange: this._shapeChange
+    })), /* @__PURE__ */ preact.h(WaveData, {
+      assembler,
+      shape
+    }));
+  }
+  resampleChildren() {
+    var { osc, in_freq, in_size } = this.state;
+    return /* @__PURE__ */ preact.h(preact.Fragment, null, /* @__PURE__ */ preact.h("div", null, /* @__PURE__ */ preact.h("label", null, "Oscillators"), " ", /* @__PURE__ */ preact.h(Oscillators, {
+      value: osc,
+      onChange: this._oscChange
+    })), /* @__PURE__ */ preact.h("div", null, /* @__PURE__ */ preact.h("label", null, "In Frequency"), " ", /* @__PURE__ */ preact.h(Frequency, {
+      value: in_freq,
+      onChange: this._inFreqChange
+    })), /* @__PURE__ */ preact.h("div", null, /* @__PURE__ */ preact.h("label", null, "In Size"), " ", /* @__PURE__ */ preact.h(WaveSize, {
+      value: in_size,
+      onChange: this._inSizeChange
+    })), /* @__PURE__ */ preact.h(ResampleDisplay, {
+      osc,
+      size: in_size,
+      freq: in_freq
+    }));
+  }
+  render() {
+    var { osc, wave, res, freq, tab } = this.state;
+    var children;
+    switch (tab) {
+      case 0:
+        children = this.sampleChildren();
+        break;
+      case 1:
+        children = this.resampleChildren();
+        break;
+      case 2:
+        children = this.noteChildren();
+        break;
+      case 3:
+        children = this.waveChildren();
+        break;
+    }
+    var options = ["Sample", "Resample", "Note", "Wave"].map((o, ix) => {
+      return /* @__PURE__ */ preact.h("option", {
+        key: ix,
+        value: ix
+      }, o);
+    });
+    return /* @__PURE__ */ preact.h("fieldset", null, /* @__PURE__ */ preact.h("legend", null, /* @__PURE__ */ preact.h("select", {
+      value: tab,
+      onChange: this._tabChange
+    }, options)), children);
+  }
+};
+
+// src/main.jsx
+window.addEventListener("load", function() {
+  preact.render(/* @__PURE__ */ preact.h(Application, null), document.getElementById("application"));
+});
diff --git a/js/preact.min.js b/js/preact.min.js
new file mode 100644
index 0000000..9b0c8dd
--- /dev/null
+++ b/js/preact.min.js
@@ -0,0 +1,2 @@
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