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AlphaTexExporter.cs
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AlphaTexExporter.cs
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using AlphaTab.Collections;
using AlphaTab.Model;
namespace AlphaTab.Exporter
{
/// <summary>
/// This class allows converting scores into alphaTex.
/// </summary>
// ReSharper disable once UnusedMember.Global
public class AlphaTexExporter
{
private readonly StringBuilder _builder;
/// <summary>
/// Initializes a new instance of the <see cref="AlphaTexExporter"/> class.
/// </summary>
public AlphaTexExporter()
{
_builder = new StringBuilder();
}
/// <summary>
/// Exports the given track.
/// </summary>
/// <param name="track">The track to export</param>
public void Export(Track track)
{
Score(track);
}
private void Score(Track track)
{
MetaData(track);
Bars(track);
}
/// <summary>
/// Returns the generated tex code.
/// </summary>
/// <returns></returns>
public string ToTex()
{
return _builder.ToString();
}
private void MetaData(Track track)
{
var score = track.Score;
StringMetaData("title", score.Title);
StringMetaData("subtitle", score.SubTitle);
StringMetaData("artist", score.Artist);
StringMetaData("album", score.Album);
StringMetaData("words", score.Words);
StringMetaData("music", score.Music);
StringMetaData("copyright", score.Copyright);
_builder.Append("\\tempo ");
_builder.Append(score.Tempo);
_builder.AppendLine();
var staff = track.Staves[0];
if (staff.Capo > 0)
{
_builder.Append("\\capo ");
_builder.Append(staff.Capo);
_builder.AppendLine();
}
_builder.Append("\\tuning");
for (var i = 0; i < staff.Tuning.Length; i++)
{
_builder.Append(" ");
_builder.Append(Tuning.GetTextForTuning(staff.Tuning[i], true));
}
_builder.Append("\\instrument ");
_builder.Append(track.PlaybackInfo.Program);
_builder.AppendLine();
_builder.Append(".");
_builder.AppendLine();
}
private void StringMetaData(string key, string value)
{
if (!string.IsNullOrWhiteSpace(value))
{
_builder.Append("\\");
_builder.Append(key);
_builder.Append(" \"");
_builder.Append(value.Replace("\"", "\\\""));
_builder.Append("\"");
_builder.AppendLine();
}
}
private void Bars(Track track)
{
// alphatab only supports single staves,
for (var i = 0; i < 1; i++)
{
for (var j = 0; j < track.Staves[i].Bars.Count; j++)
{
if (i > 0)
{
_builder.Append(" |");
_builder.AppendLine();
}
Bar(track.Staves[i].Bars[j]);
}
}
}
private void Bar(Bar bar)
{
BarMeta(bar);
Voice(bar.Voices[0]);
}
private void Voice(Voice voice)
{
for (var i = 0; i < voice.Beats.Count; i++)
{
Beat(voice.Beats[i]);
}
}
private void Beat(Beat beat)
{
if (beat.IsRest)
{
_builder.Append("r");
}
else
{
if (beat.Notes.Count > 1)
{
_builder.Append("(");
}
for (var i = 0; i < beat.Notes.Count; i++)
{
Note(beat.Notes[i]);
}
if (beat.Notes.Count > 1)
{
_builder.Append(")");
}
}
_builder.Append(".");
_builder.Append((int)beat.Duration);
_builder.Append(" ");
BeatEffects(beat);
}
private void Note(Note note)
{
if (note.IsDead)
{
_builder.Append("x");
}
else if (note.IsTieDestination)
{
_builder.Append("-");
}
else
{
_builder.Append(note.Fret);
}
_builder.Append(".");
_builder.Append(note.Beat.Voice.Bar.Staff.Tuning.Length - note.String + 1);
_builder.Append(" ");
NoteEffects(note);
}
private void NoteEffects(Note note)
{
var hasEffectOpen = false;
if (note.HasBend)
{
hasEffectOpen = EffectOpen(hasEffectOpen);
_builder.Append("be (");
for (var i = 0; i < note.BendPoints.Count; i++)
{
_builder.Append(note.BendPoints[i].Offset);
_builder.Append(" ");
_builder.Append(note.BendPoints[i].Value);
_builder.Append(" ");
}
_builder.Append(")");
}
switch (note.HarmonicType)
{
case HarmonicType.Natural:
hasEffectOpen = EffectOpen(hasEffectOpen);
_builder.Append("nh ");
break;
case HarmonicType.Artificial:
hasEffectOpen = EffectOpen(hasEffectOpen);
_builder.Append("ah ");
break;
case HarmonicType.Tap:
hasEffectOpen = EffectOpen(hasEffectOpen);
_builder.Append("th ");
break;
case HarmonicType.Pinch:
hasEffectOpen = EffectOpen(hasEffectOpen);
_builder.Append("ph ");
break;
case HarmonicType.Semi:
hasEffectOpen = EffectOpen(hasEffectOpen);
_builder.Append("sh ");
break;
}
if (note.IsTrill)
{
hasEffectOpen = EffectOpen(hasEffectOpen);
_builder.Append("tr ");
_builder.Append(note.TrillFret);
_builder.Append(" ");
switch (note.TrillSpeed)
{
case Duration.Sixteenth:
_builder.Append("16 ");
break;
case Duration.ThirtySecond:
_builder.Append("32 ");
break;
case Duration.SixtyFourth:
_builder.Append("64 ");
break;
}
}
if (note.Vibrato != VibratoType.None)
{
hasEffectOpen = EffectOpen(hasEffectOpen);
_builder.Append("v ");
}
if (note.SlideOutType == SlideOutType.Legato)
{
hasEffectOpen = EffectOpen(hasEffectOpen);
_builder.Append("sl ");
}
if (note.SlideOutType == SlideOutType.Shift)
{
hasEffectOpen = EffectOpen(hasEffectOpen);
_builder.Append("ss ");
}
if (note.IsHammerPullOrigin)
{
hasEffectOpen = EffectOpen(hasEffectOpen);
_builder.Append("h ");
}
if (note.IsGhost)
{
hasEffectOpen = EffectOpen(hasEffectOpen);
_builder.Append("g ");
}
if (note.Accentuated == AccentuationType.Normal)
{
hasEffectOpen = EffectOpen(hasEffectOpen);
_builder.Append("ac ");
}
else if (note.Accentuated == AccentuationType.Heavy)
{
hasEffectOpen = EffectOpen(hasEffectOpen);
_builder.Append("hac ");
}
if (note.IsPalmMute)
{
hasEffectOpen = EffectOpen(hasEffectOpen);
_builder.Append("pm ");
}
if (note.IsStaccato)
{
hasEffectOpen = EffectOpen(hasEffectOpen);
_builder.Append("st ");
}
if (note.IsLetRing)
{
hasEffectOpen = EffectOpen(hasEffectOpen);
_builder.Append("lr ");
}
switch (note.LeftHandFinger)
{
case Fingers.Thumb:
hasEffectOpen = EffectOpen(hasEffectOpen);
_builder.Append("1 ");
break;
case Fingers.IndexFinger:
hasEffectOpen = EffectOpen(hasEffectOpen);
_builder.Append("2 ");
break;
case Fingers.MiddleFinger:
hasEffectOpen = EffectOpen(hasEffectOpen);
_builder.Append("3 ");
break;
case Fingers.AnnularFinger:
hasEffectOpen = EffectOpen(hasEffectOpen);
_builder.Append("4 ");
break;
case Fingers.LittleFinger:
hasEffectOpen = EffectOpen(hasEffectOpen);
_builder.Append("5 ");
break;
}
switch (note.RightHandFinger)
{
case Fingers.Thumb:
hasEffectOpen = EffectOpen(hasEffectOpen);
_builder.Append("1 ");
break;
case Fingers.IndexFinger:
hasEffectOpen = EffectOpen(hasEffectOpen);
_builder.Append("2 ");
break;
case Fingers.MiddleFinger:
hasEffectOpen = EffectOpen(hasEffectOpen);
_builder.Append("3 ");
break;
case Fingers.AnnularFinger:
hasEffectOpen = EffectOpen(hasEffectOpen);
_builder.Append("4 ");
break;
case Fingers.LittleFinger:
hasEffectOpen = EffectOpen(hasEffectOpen);
_builder.Append("5 ");
break;
}
EffectClose(hasEffectOpen);
}
private bool EffectOpen(bool hasBeatEffectOpen)
{
if (!hasBeatEffectOpen)
{
_builder.Append("{");
}
return true;
}
private void EffectClose(bool hasBeatEffectOpen)
{
if (hasBeatEffectOpen)
{
_builder.Append("}");
}
}
private void BeatEffects(Beat beat)
{
var hasEffectOpen = false;
if (beat.FadeIn)
{
hasEffectOpen = EffectOpen(hasEffectOpen);
_builder.Append("f ");
}
switch (beat.GraceType)
{
case GraceType.BendGrace:
_builder.Append("gr b ");
break;
case GraceType.OnBeat:
_builder.Append("gr ob ");
break;
case GraceType.BeforeBeat:
_builder.Append("gr ");
break;
}
if (beat.Vibrato != VibratoType.None)
{
hasEffectOpen = EffectOpen(hasEffectOpen);
_builder.Append("v ");
}
if (beat.Slap)
{
hasEffectOpen = EffectOpen(hasEffectOpen);
_builder.Append("s ");
}
if (beat.Pop)
{
hasEffectOpen = EffectOpen(hasEffectOpen);
_builder.Append("p ");
}
if (beat.Dots == 2)
{
hasEffectOpen = EffectOpen(hasEffectOpen);
_builder.Append("dd ");
}
else if (beat.Dots == 1)
{
hasEffectOpen = EffectOpen(hasEffectOpen);
_builder.Append("d ");
}
if (beat.PickStroke == PickStroke.Up)
{
hasEffectOpen = EffectOpen(hasEffectOpen);
_builder.Append("su ");
}
else if (beat.PickStroke == PickStroke.Down)
{
hasEffectOpen = EffectOpen(hasEffectOpen);
_builder.Append("sd ");
}
if (beat.HasTuplet)
{
var tupletValue = 0;
if (beat.TupletDenominator == 3 && beat.TupletNumerator == 2)
{
tupletValue = 3;
}
else if (beat.TupletDenominator == 5 && beat.TupletNumerator == 4)
{
tupletValue = 5;
}
else if (beat.TupletDenominator == 6 && beat.TupletNumerator == 4)
{
tupletValue = 6;
}
else if (beat.TupletDenominator == 7 && beat.TupletNumerator == 4)
{
tupletValue = 7;
}
else if (beat.TupletDenominator == 9 && beat.TupletNumerator == 8)
{
tupletValue = 9;
}
else if (beat.TupletDenominator == 10 && beat.TupletNumerator == 8)
{
tupletValue = 10;
}
else if (beat.TupletDenominator == 11 && beat.TupletNumerator == 8)
{
tupletValue = 11;
}
else if (beat.TupletDenominator == 12 && beat.TupletNumerator == 8)
{
tupletValue = 12;
}
if (tupletValue != 0)
{
hasEffectOpen = EffectOpen(hasEffectOpen);
_builder.Append("tu ");
_builder.Append(tupletValue);
_builder.Append(" ");
}
}
if (beat.HasWhammyBar)
{
hasEffectOpen = EffectOpen(hasEffectOpen);
_builder.Append("tbe (");
for (var i = 0; i < beat.WhammyBarPoints.Count; i++)
{
_builder.Append(beat.WhammyBarPoints[i].Offset);
_builder.Append(" ");
_builder.Append(beat.WhammyBarPoints[i].Value);
_builder.Append(" ");
}
_builder.Append(")");
}
if (beat.IsTremolo)
{
hasEffectOpen = EffectOpen(hasEffectOpen);
_builder.Append("tp ");
if (beat.TremoloSpeed == Duration.Eighth)
{
_builder.Append("8 ");
}
else if (beat.TremoloSpeed == Duration.Sixteenth)
{
_builder.Append("16 ");
}
else if (beat.TremoloSpeed == Duration.ThirtySecond)
{
_builder.Append("32 ");
}
else
{
_builder.Append("8 ");
}
}
EffectClose(hasEffectOpen);
}
private void BarMeta(Bar bar)
{
var masterBar = bar.MasterBar;
if (masterBar.Index > 0)
{
var previousMasterBar = masterBar.PreviousMasterBar;
var previousBar = bar.PreviousBar;
if (previousMasterBar.TimeSignatureDenominator != masterBar.TimeSignatureDenominator ||
previousMasterBar.TimeSignatureNumerator != masterBar.TimeSignatureNumerator)
{
_builder.Append("\\ts ");
_builder.Append(masterBar.TimeSignatureNumerator);
_builder.Append(" ");
_builder.Append(masterBar.TimeSignatureDenominator);
_builder.AppendLine();
}
if (previousMasterBar.KeySignature != masterBar.KeySignature)
{
_builder.Append("\\ks ");
switch (masterBar.KeySignature)
{
case KeySignature.Cb:
_builder.Append("cb");
break;
case KeySignature.Gb:
_builder.Append("gb");
break;
case KeySignature.Db:
_builder.Append("db");
break;
case KeySignature.Ab:
_builder.Append("ab");
break;
case KeySignature.Eb:
_builder.Append("eb");
break;
case KeySignature.Bb:
_builder.Append("bb");
break;
case KeySignature.F:
_builder.Append("f");
break;
case KeySignature.C:
_builder.Append("c");
break;
case KeySignature.G:
_builder.Append("g");
break;
case KeySignature.D:
_builder.Append("d");
break;
case KeySignature.A:
_builder.Append("a");
break;
case KeySignature.E:
_builder.Append("e");
break;
case KeySignature.B:
_builder.Append("b");
break;
case KeySignature.FSharp:
_builder.Append("f#");
break;
case KeySignature.CSharp:
_builder.Append("c#");
break;
}
_builder.AppendLine();
}
if (bar.Clef != previousBar.Clef)
{
_builder.Append("\\clef ");
switch (bar.Clef)
{
case Clef.Neutral:
_builder.Append("n");
break;
case Clef.C3:
_builder.Append("c3");
break;
case Clef.C4:
_builder.Append("c4");
break;
case Clef.F4:
_builder.Append("f4");
break;
case Clef.G2:
_builder.Append("g2");
break;
}
_builder.AppendLine();
}
if (masterBar.TempoAutomation != null)
{
_builder.Append("\\tempo ");
_builder.Append(masterBar.TempoAutomation.Value);
_builder.AppendLine();
}
}
if (masterBar.IsRepeatStart)
{
_builder.Append("\\ro ");
_builder.AppendLine();
}
if (masterBar.IsRepeatEnd)
{
_builder.Append("\\rc ");
_builder.Append(masterBar.RepeatCount + 1);
_builder.AppendLine();
}
}
}
}