Converts MIDI files into music box scores that are ready to print.
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4.4 KiB

using System;
using System.Collections.Generic;
using System.Linq;
using Melanchall.DryWetMidi.Smf;
using Melanchall.DryWetMidi.Smf.Interaction;
using SBRL.Utilities;
namespace MusicBoxConverter
{
public class MusicBoxScoreGenerator
{
public bool Debug { get; set; } = false;
public Vector2 Offset { get; set; } = new Vector2(10, 10);
public Vector2 ScaleFactor { get; set; } = new Vector2(0.03f, 4f);
public float HoleSize { get; set; } = 1f;
public Vector2 ArrowSize { get; set; } = new Vector2(25, 25);
public float ArrowSpacing { get; set; } = 50f;
public float ArrowStrokeWidth { get; set; } = 8;
public string ArrowColour { get; set; } = "#dacef3";
private int trackLength;
public int TrackLength
{
get
{
if (trackLength == 0)
trackLength = (int)AllNotes().Max((Note arg) => arg.Time);
return trackLength;
}
}
public int MaxNoteNumber {
get {
return SelectedMusicBox.HighestNote.NoteNumber;
}
}
public int MinNoteNumber {
get
{
return SelectedMusicBox.LowestNote.NoteNumber;
}
}
public MusicBox SelectedMusicBox { get; private set; }
private MidiFile midiFile;
public MusicBoxScoreGenerator(string filename, MusicBox inMusicBox)
{
SelectedMusicBox = inMusicBox;
midiFile = MidiFile.Read(filename);
// Set the scale factor based on the strip height of the music box
ScaleFactor = new Vector2(
ScaleFactor.X,
SelectedMusicBox.StripHeightMm / (SelectedMusicBox.NoteCount-1)
);
foreach(Note note in AllNotes()) {
if (!SelectedMusicBox.IsValidNote(note))
Console.Error.WriteLine($"Warning: The note {note} at {note.Time} can't be played by the {SelectedMusicBox}.");
}
}
public void Output(string destinationFilename)
{
Vector2 area = new Vector2(TrackLength, SelectedMusicBox.NoteCount-1).Multiply(ScaleFactor);
Vector2 size = area.Add(Offset.Multiply(2));
SvgWriter svg = new SvgWriter(
destinationFilename,
$"{size.X}mm", $"{size.Y}mm"
) {
UnitSuffix = "mm"
};
// Draw directional arrows down the score
for (float i = 0; i < area.X; i += ArrowSpacing)
{
Vector2 arrowPos = new Vector2(i, area.Y / 2 + Offset.Y);
svg.WriteLine(
arrowPos.Subtract(ArrowSize),
arrowPos,
ArrowColour,
ArrowStrokeWidth
);
svg.WriteLine(
arrowPos,
arrowPos.Subtract(new Vector2(ArrowSize.X, -ArrowSize.Y)),
ArrowColour,
ArrowStrokeWidth
);
}
// Draw a marker at the beginning of the score
svg.WriteRectangle(
new Vector2(Offset.X / 2, Offset.Y),
new Vector2(Offset.X / 2, area.Y),
"#ffa500", -1,
true
);
svg.WriteCircle(
new Vector2((Offset.X * 3) / 4, Offset.Y * 1.25f),
HoleSize,
"#ff0077"
);
svg.WriteCircle(
new Vector2((Offset.X * 3) / 4, Offset.Y + area.Y - Offset.Y * 0.25f),
HoleSize * 2,
"#0077ff"
);
// Draw the note lines
for (float i = 0; i < area.Y; i += ScaleFactor.Y) {
Vector2 start = Offset.Add(new Vector2(0, i));
svg.WriteLine(start, start.Add(new Vector2(area.X, 0)), "darkgreen", 0.75f);
}
// Draw a red box around everything
svg.WriteRectangle(Offset, area, "red", 0.75f);
int noteIndex = 0;
foreach (Note note in AllNotes())
{
if(Debug) {
Console.WriteLine(
$"[Note] {note.Time}: " +
$"{note.NoteName}{note.Octave}/{note.NoteNumber} " +
$"-> {SelectedMusicBox.NoteToBoxNumber(note)}"
);
}
Vector2 holePosition = new Vector2(
Offset.X + note.Time * ScaleFactor.X,
Offset.Y + ((SelectedMusicBox.NoteCount - 1) - SelectedMusicBox.NoteToBoxNumber(note)) * ScaleFactor.Y
);
svg.WriteCircle(
holePosition,
HoleSize // radius
);
svg.WritePlus(
holePosition,
new Vector2(HoleSize, HoleSize).Multiply(1.5f)
);
svg.WriteText(
holePosition.Subtract(new Vector2(-HoleSize * 2, HoleSize/2 + -svg.FontSizeRegular/2)),
$"{noteIndex}",
"regular"
);
noteIndex++;
}
svg.Complete();
}
public IEnumerable<Note> AllNotes()
{
foreach(TrackChunk chunk in midiFile.Chunks.OfType<TrackChunk>())
{
using(NotesManager notesManager = new NotesManager(chunk.Events))
{
foreach(Note note in notesManager.Notes)
yield return note;
}
}
}
}
}