/*
* Ln Sets the duration (length) of the notes. The variable n does not indicate an actual duration
* amount but rather a note type; L1 - whole note, L2 - half note, L4 - quarter note, etc.
* (L8, L16, L32, L64, ...). By default, n = 4.
* For triplets and quintets, use L3, L6, L12, ... and L5, L10, L20, ... series respectively.
* The shorthand notation of length is also provided for a note. For example, "L4 CDE L8 FG L4 AB"
* can be shortened to "L4 CDE F8G8 AB". F and G play as eighth notes while others play as quarter notes.
* On Sets the current octave. Valid values for n are 0 through 6. An octave begins with C and ends with B.
* Remember that C- is equivalent to B.
* < > Changes the current octave respectively down or up one level.
* Nn Plays a specified note in the seven-octave range. Valid values are from 0 to 84. (0 is a pause.)
* Cannot use with sharp and flat. Cannot use with the shorthand notation neither.
* MN Stand for Music Normal. Note duration is 7/8ths of the length indicated by Ln. It is the default mode.
* ML Stand for Music Legato. Note duration is full length of that indicated by Ln.
* MS Stand for Music Staccato. Note duration is 3/4ths of the length indicated by Ln.
* Pn Causes a silence (pause) for the length of note indicated (same as Ln).
* Tn Sets the number of "L4"s per minute (tempo). Valid values are from 32 to 255. The default value is T120.
* . When placed after a note, it causes the duration of the note to be 3/2 of the set duration.
* This is how to get "dotted" notes. "L4 C#." would play C sharp as a dotted quarter note.
* It can be used for a pause as well.
* MB MF Stand for Music Background and Music Foreground. MB places a maximum of 32 notes in the music buffer
* and plays them while executing other statements. Works very well for games.
* MF switches the PLAY mode back to normal. Default is MF.
*/
public STR2WAV(string snd)
{
snd = snd.ToUpper();
int i = 0;
while (i < snd.Length)
{
char c = snd[i];
switch (c)
{
case 'L':
{
i++;
string val = "";
while (i < snd.Length && char.IsDigit(snd[i]))
{
val += snd[i];
i++;
}
int duration = int.Parse(val);
commands.Add(new PlayNoteLength(duration));
i--;
}
break;
case 'T':
{
i++;
string val = "";
while (i < snd.Length && char.IsDigit(snd[i]))
{
val += snd[i];
i++;
}
int duration = int.Parse(val);
commands.Add(new PlayTempo(duration));
i--;
}
break;
case 'M':
{
i++;
switch (snd[i])
{
case 'L':
commands.Add(new PlayLegato());
break;
case 'N':
commands.Add(new PlayNormal());
break;
case 'S':
commands.Add(new PlayStaccato());
break;
case 'B':
commands.Add(new PlayMusicBackground());
break;
case 'F':
commands.Add(new PlayMusicForeground());
break;
default:
throw new Exception("Invalid duration " + snd[i] + "!");
}
}
break;
case 'A':
case 'B':
case 'C':
case 'D':
case 'E':
case 'F':
case 'G':
{
bool flat = false;
bool sharp = false;
bool dotted = false;
bool doubledotted = false;
PlayNote n = new PlayNote();
i++;
if (i < snd.Length && snd[i] == '+')
{
sharp = true; i++;
}
if (i < snd.Length && snd[i] == '-')
{
flat = true; i++;
}
if (i < snd.Length && snd[i] == '.')
{
dotted = true; i++;
if (snd[i] == '.')
{
doubledotted = true;
i++;
}
}
if (i < snd.Length && char.IsDigit(snd[i]))
{
string val = "";
while (i < snd.Length && char.IsDigit(snd[i]))
{
val += snd[i];
i++;
}
int duration = int.Parse(val);
if (i < snd.Length && snd[i] == '+')
{
sharp = true; i++;
}
if (i < snd.Length && snd[i] == '-')
{
flat = true; i++;
}
if (i < snd.Length && snd[i] == '.')
{
dotted = true; i++;
if (snd[i] == '.')
{
doubledotted = true;
i++;
}
}
n.Note = c;
n.Length = duration;
}
else
{
n.Note = c;
}
n.Flat = flat;
n.Sharp = sharp;
n.Dotted = dotted;
n.DoubleDotted = doubledotted;
commands.Add(n);
i--;
}
break;
case 'O':
{
i++;
string val = "";
while (i < snd.Length && char.IsDigit(snd[i]))
{
val += snd[i];
i++;
}
int octave = int.Parse(val);
commands.Add(new PlayOctave(octave));
i--;
}
break;
case 'P':
{
i++;
string val = "";
while (i < snd.Length && char.IsDigit(snd[i]))
{
val += snd[i];
i++;
}
int pause = int.Parse(val);
commands.Add(new PlayPause(pause));
i--;
}
break;
default:
throw new Exception("Command " + c + " not implemented!");
}
i++;
}
}
public void generate()
{
foreach (Command c in commands)
{
if (c as PlayTempo != null)
{
tempo = ((PlayTempo)c).Tempo;
}
else if (c as PlayNoteLength != null)
{
notelength = ((PlayNoteLength)c).Length;
}
else if (c as PlayMusicBackground != null)
{
MusicBackground = true;
}
else if (c as PlayMusicForeground != null)
{
MusicBackground = false;
}
else if (c as PlayNormal != null)
{
NoteDuration = NoteDurations.Normal;
}
else if (c as PlayLegato != null)
{
NoteDuration = NoteDurations.Legato;
}
else if (c as PlayStaccato != null)
{
NoteDuration = NoteDurations.Staccato;
}
else if (c as PlayNote != null)
{
PlayNote n = c as PlayNote;
int noteno = n.getNumber();
double herz = FREQ[(12 * (octave + 2)) + noteno];
int thisnotelength = notelength;
if (n.Length > 0)
{
thisnotelength = n.Length;
}
double totalseconds = (1.0 / (tempo / 60.0)) * (4.0 / thisnotelength);
double noteseconds = totalseconds;
double pause = 0.0;
if (NoteDuration == NoteDurations.Normal)
{
noteseconds = noteseconds * (7.0 / 8.0);
pause = totalseconds - noteseconds;
}
else if (NoteDuration == NoteDurations.Staccato)
{
noteseconds = noteseconds * (3.0 / 4.0);
pause = totalseconds - noteseconds;
}
if (n.DoubleDotted)
{
noteseconds += (noteseconds / 2.0) + (noteseconds / 4.0);
}
else if (n.Dotted)
{
noteseconds += (noteseconds / 2.0);
}
Tone(herz, noteseconds);
if (pause > 0.0)
{
Tone(0, pause);
}
}
else if (c as PlayPause != null)
{
PlayPause pp = c as PlayPause;
double totalseconds = (1.0 / (tempo / 60.0)) * (4.0 / pp.Pause);
Tone(0, totalseconds);
}
else if (c as PlayOctave != null)
{
octave = ((PlayOctave)c).Octave;
}
else
{
throw new Exception("Not implemented " + c.GetType().ToString());
}
}
}
