public static Rttl Parse(string rttlData)
{
string[] sections = rttlData.Split(':');
string name = sections[0].Trim();
string[] tones = sections[2].Split(',');
int duration = 4;
int octave = 6;
int bpm = 63;
if (sections[1].Length > 0)
{
string[] controls = sections[1].Split(',');
foreach (string item in controls)
{
string control = item.Trim();
string valueStr = control.Substring(2, control.Length - 2);
int value = Int32.Parse(valueStr);
switch (control[0].ToLower())
{
case 'd':
duration = value;
break;
case 'o':
octave = value;
break;
case 'b':
bpm = value;
break;
}
}
}
var result = new Rttl
{
Name = name,
Tones = tones,
Duration = duration,
Octave = octave,
Bpm = bpm
};
return(result);
}
public static Rttl Parse(string rttlData)
{
string[] sections = rttlData.Split(':');
string name = sections[0].Trim();
string[] tones = sections[2].Split(',');
int duration = 4;
int octave = 6;
int bpm = 63;
if (sections[1].Length > 0)
{
string[] controls = sections[1].Split(',');
foreach (string item in controls)
{
string control = item.Trim();
string valueStr = control.Substring(2, control.Length - 2);
int value = Int32.Parse(valueStr);
switch (control[0].ToLower())
{
case 'd':
duration = value;
break;
case 'o':
octave = value;
break;
case 'b':
bpm = value;
break;
}
}
}
var result = new Rttl
{
Name = name,
Tones = tones,
Duration = duration,
Octave = octave,
Bpm = bpm
};
return result;
}
public void Play(string rttlData)
{
const int oneBpmWholeNote = 60 * 4 * 1000; //one bpm whole note in ms
Rttl rttl = Rttl.Parse(rttlData);
int wholeNote = oneBpmWholeNote / rttl.Bpm;
foreach (string tone in rttl.Tones)
{
bool specialDuration;
string durationStr, noteStr, scaleStr;
ParseCommand(tone, out durationStr, out noteStr, out scaleStr, out specialDuration);
int duration = rttl.Duration;
if (durationStr.Length > 0)
{
duration = Int32.Parse(durationStr);
}
duration = specialDuration ? (3 * wholeNote) / (2 * duration) : wholeNote / duration;
int freqIndex;
switch (noteStr[0].ToLower())
{
case 'c':
freqIndex = 0;
break;
case 'd':
freqIndex = 2;
break;
case 'e':
freqIndex = 4;
break;
case 'f':
freqIndex = 5;
break;
case 'g':
freqIndex = 7;
break;
case 'a':
freqIndex = 9;
break;
case 'b':
freqIndex = 11;
break;
default:
freqIndex = -1;
break;
}
if (noteStr.Length > 1) //#
{
freqIndex++;
}
int scale = rttl.Octave;
if (scaleStr.Length > 0)
{
scale = Int32.Parse(scaleStr);
}
if (freqIndex >= 0)
{
double freq = Scales[scale - 4][freqIndex];
Debug.Print("Playing: (" + tone + ")" + freq + " " + duration);
_speaker.Play(freq);
Thread.Sleep(duration);
_speaker.Pause();
}
else
{
Debug.Print("Pausing: (" + tone + ") " + duration);
_speaker.Pause();
Thread.Sleep(duration);
}
}
}
