private Voice CreateMergedVoice(Dictionary <string, Voice> voices)
{
if (voices.Count == 1)
{
return(voices.Values.First());
}
MutableVoice mergedVoice = new MutableVoice();
List <Sentence> allSentences = voices.Values.SelectMany(voice => voice.Sentences).ToList();
List <Note> allNotes = allSentences.SelectMany(sentence => sentence.Notes).ToList();
// Sort notes by start beat
allNotes.Sort((note1, note2) => note1.StartBeat.CompareTo(note2.StartBeat));
// Find sentence borders
List <int> lineBreaks = allSentences.Select(sentence => sentence.LinebreakBeat).Where(lineBreak => lineBreak > 0).ToList();
lineBreaks.Sort();
int lineBreakIndex = 0;
int nextLineBreakBeat = lineBreaks[lineBreakIndex];
// Create sentences
MutableSentence mutableSentence = new MutableSentence();
foreach (Note note in allNotes)
{
if (!mutableSentence.GetNotes().IsNullOrEmpty() &&
(nextLineBreakBeat >= 0 && note.StartBeat > nextLineBreakBeat))
{
// Finish the last sentence
mutableSentence.SetLinebreakBeat(nextLineBreakBeat);
mergedVoice.Add((Sentence)mutableSentence);
mutableSentence = new MutableSentence();
lineBreakIndex++;
if (lineBreakIndex < lineBreaks.Count)
{
nextLineBreakBeat = lineBreaks[lineBreakIndex];
}
else
{
lineBreakIndex = -1;
}
}
mutableSentence.Add(note);
}
// Finish the last sentence
mergedVoice.Add((Sentence)mutableSentence);
return((Voice)mergedVoice);
}
public void TestInit()
{
mv = new MutableVoice();
}
public static Dictionary <string, Voice> ParseFile(string path, Encoding enc, IEnumerable <string> voiceIdentifiers)
{
Dictionary <string, MutableVoice> res = new Dictionary <string, MutableVoice>();
foreach (string voiceIdentifier in voiceIdentifiers)
{
res.Add(voiceIdentifier, new MutableVoice());
}
MutableVoice currentVoice = null;
MutableSentence currentSentence = null;
bool endFound = false;
// if this is a solo song (without a named voice) then just add one with identifier "" (empty string)
if (res.Count == 0)
{
res.Add("", new MutableVoice());
currentVoice = res[""];
}
using (StreamReader reader = TxtReader.GetFileStreamReader(path, enc))
{
uint lineNumber = 0;
while (!endFound && !reader.EndOfStream)
{
++lineNumber;
string line = reader.ReadLine();
switch (line[0])
{
case '#':
// headers are ignored at this stage
break;
case 'E':
// finish any current open sentence
if (currentVoice != null && currentSentence != null)
{
currentVoice.Add((Sentence)currentSentence);
}
// now we are done
endFound = true;
break;
case 'P':
// save the current sentence, if any
if (currentVoice != null && currentSentence != null)
{
currentVoice.Add((Sentence)currentSentence);
}
// switch to the new voice
try
{
currentVoice = res[line];
currentSentence = null;
}
catch (KeyNotFoundException)
{
ThrowLineError(lineNumber, "No such voice: " + line);
}
break;
case '-':
if (currentVoice == null)
{
ThrowLineError(lineNumber, "Linebreak encountered but no voice is active");
}
else if (currentSentence == null)
{
ThrowLineError(lineNumber, "Linebreak encountered without preceding notes");
}
try
{
currentSentence.SetLinebreakBeat(ParseLinebreak(line.Substring(2)));
currentVoice.Add((Sentence)currentSentence);
currentSentence = null;
}
catch (VoicesBuilderException e)
{
ThrowLineError(lineNumber, e.Message);
}
break;
case ':':
case '*':
case 'F':
case 'R':
case 'G':
if (currentVoice == null)
{
ThrowLineError(lineNumber, "Note encountered but no voice is active");
}
else if (currentSentence == null)
{
currentSentence = new MutableSentence();
}
try
{
currentSentence.Add(ParseNote(line));
}
catch (VoicesBuilderException e)
{
ThrowLineError(lineNumber, e.Message);
}
break;
default:
ThrowLineError(lineNumber, "Invalid instruction: " + line);
break;
}
}
}
Dictionary <string, Voice> actualRes = new Dictionary <string, Voice>();
foreach (var item in res)
{
actualRes.Add(item.Key, (Voice)item.Value);
}
return(actualRes);
}
