public List <KaraokeSegment> Parse(Stream stream)
{
if (!stream.CanRead)
{
throw new ArgumentException("Cannot read from stream");
}
var words = new List <KaraokeSegment>();
KaraokeSegment currentItem = null;
float lastParsedTime = -1;
bool mustBreakLine = false;
using (var reader = new StreamReader(stream, true))
{
string nextLine;
while ((nextLine = reader.ReadLine()) != null)
{
int currPosition = 0;
while (currPosition < nextLine.Length)
{
TokenType type;
object token;
nextLine = nextLine.Substring(currPosition);
currPosition = NextToken(nextLine, out type, out token);
if (type == TokenType.Text)
{
if (currentItem != null) // multi-line
{
if (string.IsNullOrEmpty(currentItem.text.Trim()))
{
currentItem.text = (string)token;
}
else
{
currentItem.text = currentItem.text + " " + (string)token;
}
}
else
{
if (lastParsedTime < 0)
{
throw new FormatException("Unable to parse: start time not specified");
}
currentItem = new KaraokeSegment();
currentItem.start = lastParsedTime;
currentItem.text = (string)token;
if (mustBreakLine)
{
currentItem.starsWithLineBreak = true;
mustBreakLine = false;
}
}
}
else if (type == TokenType.BreakLine)
{
mustBreakLine = true;
}
else if (type == TokenType.Time)
{
lastParsedTime = (float)token;
if (currentItem != null) // completed
{
if (string.IsNullOrEmpty(currentItem.text.Trim()))
{
// skip
if (currentItem.starsWithLineBreak)
{
mustBreakLine = true;
}
}
else
{
currentItem.end = lastParsedTime;
words.Add(currentItem);
}
currentItem = null;
}
}
}
}
}
return(words);
}
public List <KaraokeSegment> Parse(Stream stream)
{
if (!stream.CanRead)
{
throw new ArgumentException("Cannot read from stream");
}
var words = new List <KaraokeSegment>();
using (var reader = new StreamReader(stream, true))
{
var parts = GetParts(reader);
if (parts.Count > 0)
{
foreach (var p in parts)
{
var lines = p.Split(new string[] { Environment.NewLine }, StringSplitOptions.RemoveEmptyEntries);
var item = new KaraokeSegment();
bool parsedTime = false;
for (int i = 0; i < lines.Length; ++i)
{
var line = lines[i];
line = line.Trim();
if (string.IsNullOrEmpty(line))
{
continue;
}
if (!parsedTime)
{
float startTime;
float endTime;
if (TryParseTime(line, out startTime, out endTime))
{
parsedTime = true;
item.start = startTime;
item.end = endTime;
}
}
else
{
if (string.IsNullOrEmpty(item.text))
{
item.text = line;
}
else
{
item.text = item.text + " " + line;
}
}
}
if (parsedTime && item.text != null)
{
words.Add(item);
}
}
if (words.Count > 0)
{
return(words);
}
else
{
throw new ArgumentException("The song is empty");
}
}
else
{
throw new FormatException("Unable to parse VTT format.");
}
}
}