mirror of
https://github.com/SubtitleEdit/subtitleedit.git
synced 2024-11-23 11:42:36 +01:00
367 lines
14 KiB
C#
367 lines
14 KiB
C#
using System;
|
|
using System.Collections.Generic;
|
|
using System.Text;
|
|
using System.Text.RegularExpressions;
|
|
|
|
namespace Nikse.SubtitleEdit.Core.SubtitleFormats
|
|
{
|
|
/// <summary>
|
|
/// http://www.whatwg.org/specs/web-apps/current-work/webvtt.html
|
|
/// </summary>
|
|
public class WebVTT : SubtitleFormat
|
|
{
|
|
|
|
private static readonly Regex RegexTimeCodes = new Regex(@"^-?\d+:-?\d+:-?\d+\.-?\d+\s*-->\s*-?\d+:-?\d+:-?\d+\.-?\d+", RegexOptions.Compiled);
|
|
private static readonly Regex RegexTimeCodesMiddle = new Regex(@"^-?\d+:-?\d+\.-?\d+\s*-->\s*-?\d+:-?\d+:-?\d+\.-?\d+", RegexOptions.Compiled);
|
|
private static readonly Regex RegexTimeCodesShort = new Regex(@"^-?\d+:-?\d+\.-?\d+\s*-->\s*-?\d+:-?\d+\.-?\d+", RegexOptions.Compiled);
|
|
|
|
public override string Extension
|
|
{
|
|
get { return ".vtt"; }
|
|
}
|
|
|
|
public override string Name
|
|
{
|
|
get { return "WebVTT"; }
|
|
}
|
|
|
|
public override bool IsTimeBased
|
|
{
|
|
get { return true; }
|
|
}
|
|
|
|
public override bool IsMine(List<string> lines, string fileName)
|
|
{
|
|
var subtitle = new Subtitle();
|
|
LoadSubtitle(subtitle, lines, fileName);
|
|
return subtitle.Paragraphs.Count > _errorCount;
|
|
}
|
|
|
|
public override string ToText(Subtitle subtitle, string title)
|
|
{
|
|
const string timeCodeFormatHours = "{0:00}:{1:00}:{2:00}.{3:000}"; // hh:mm:ss.mmm
|
|
const string paragraphWriteFormat = "{0} --> {1}{2}{5}{3}{4}{5}";
|
|
|
|
var sb = new StringBuilder();
|
|
sb.AppendLine("WEBVTT");
|
|
sb.AppendLine();
|
|
foreach (Paragraph p in subtitle.Paragraphs)
|
|
{
|
|
string start = string.Format(timeCodeFormatHours, p.StartTime.Hours, p.StartTime.Minutes, p.StartTime.Seconds, p.StartTime.Milliseconds);
|
|
string end = string.Format(timeCodeFormatHours, p.EndTime.Hours, p.EndTime.Minutes, p.EndTime.Seconds, p.EndTime.Milliseconds);
|
|
string positionInfo = GetPositionInfoFromAssTag(p);
|
|
|
|
string style = string.Empty;
|
|
if (!string.IsNullOrEmpty(p.Extra) && subtitle.Header == "WEBVTT")
|
|
style = p.Extra;
|
|
sb.AppendLine(string.Format(paragraphWriteFormat, start, end, positionInfo, FormatText(p), style, Environment.NewLine));
|
|
}
|
|
return sb.ToString().Trim();
|
|
}
|
|
|
|
internal static string GetPositionInfoFromAssTag(Paragraph p)
|
|
{
|
|
string positionInfo = string.Empty;
|
|
|
|
if (p.Text.StartsWith("{\\a", StringComparison.Ordinal))
|
|
{
|
|
string position = null; // horizontal
|
|
if (p.Text.StartsWith("{\\an1}", StringComparison.Ordinal) || p.Text.StartsWith("{\\an4}", StringComparison.Ordinal) || p.Text.StartsWith("{\\an7}", StringComparison.Ordinal)) // advanced sub station alpha
|
|
{
|
|
position = "20%"; //left
|
|
}
|
|
else if (p.Text.StartsWith("{\\an3}", StringComparison.Ordinal) || p.Text.StartsWith("{\\an6}", StringComparison.Ordinal) || p.Text.StartsWith("{\\an9}", StringComparison.Ordinal)) // advanced sub station alpha
|
|
{
|
|
position = "80%"; //right
|
|
}
|
|
|
|
string line = null;
|
|
if (p.Text.StartsWith("{\\an7}", StringComparison.Ordinal) || p.Text.StartsWith("{\\an8}", StringComparison.Ordinal) || p.Text.StartsWith("{\\an9}", StringComparison.Ordinal)) // advanced sub station alpha
|
|
{
|
|
line = "20%"; //top
|
|
}
|
|
else if (p.Text.StartsWith("{\\an4}", StringComparison.Ordinal) || p.Text.StartsWith("{\\an5}", StringComparison.Ordinal) || p.Text.StartsWith("{\\an6}", StringComparison.Ordinal)) // advanced sub station alpha
|
|
{
|
|
line = "50%"; //middle
|
|
}
|
|
|
|
if (!string.IsNullOrEmpty(position))
|
|
{
|
|
positionInfo = " position:" + position;
|
|
}
|
|
if (!string.IsNullOrEmpty(line))
|
|
{
|
|
if (positionInfo == null)
|
|
positionInfo = " line:" + line;
|
|
else
|
|
positionInfo = positionInfo += " line:" + line;
|
|
}
|
|
}
|
|
|
|
return positionInfo;
|
|
}
|
|
|
|
internal static string FormatText(Paragraph p)
|
|
{
|
|
string text = Utilities.RemoveSsaTags(p.Text);
|
|
while (text.Contains(Environment.NewLine + Environment.NewLine))
|
|
text = text.Replace(Environment.NewLine + Environment.NewLine, Environment.NewLine);
|
|
return text;
|
|
}
|
|
|
|
public override void LoadSubtitle(Subtitle subtitle, List<string> lines, string fileName)
|
|
{
|
|
_errorCount = 0;
|
|
Paragraph p = null;
|
|
bool textDone = true;
|
|
string positionInfo = string.Empty;
|
|
foreach (string line in lines)
|
|
{
|
|
string s = line;
|
|
bool isTimeCode = line.Contains("-->");
|
|
if (isTimeCode && RegexTimeCodesMiddle.IsMatch(s))
|
|
{
|
|
s = "00:" + s; // start is without hours, end is with hours
|
|
}
|
|
if (isTimeCode && RegexTimeCodesShort.IsMatch(s))
|
|
{
|
|
s = "00:" + s.Replace("--> ", "--> 00:");
|
|
}
|
|
|
|
if (isTimeCode && RegexTimeCodes.IsMatch(s))
|
|
{
|
|
textDone = false;
|
|
if (p != null)
|
|
{
|
|
subtitle.Paragraphs.Add(p);
|
|
p = null;
|
|
}
|
|
try
|
|
{
|
|
string[] parts = s.Replace("-->", "@").Split(new[] { '@' }, StringSplitOptions.RemoveEmptyEntries);
|
|
p = new Paragraph();
|
|
p.StartTime = GetTimeCodeFromString(parts[0]);
|
|
p.EndTime = GetTimeCodeFromString(parts[1]);
|
|
positionInfo = GetPositionInfo(s);
|
|
}
|
|
catch (Exception exception)
|
|
{
|
|
System.Diagnostics.Debug.WriteLine(exception.Message);
|
|
_errorCount++;
|
|
p = null;
|
|
}
|
|
}
|
|
else if (subtitle.Paragraphs.Count == 0 && line.Trim() == "WEBVTT")
|
|
{
|
|
subtitle.Header = "WEBVTT";
|
|
}
|
|
else if (p != null && !string.IsNullOrWhiteSpace(line))
|
|
{
|
|
string text = positionInfo + line.Trim();
|
|
if (!textDone)
|
|
p.Text = (p.Text + Environment.NewLine + text).Trim();
|
|
positionInfo = string.Empty;
|
|
}
|
|
else if (line.Length == 0)
|
|
{
|
|
textDone = true;
|
|
}
|
|
}
|
|
if (p != null)
|
|
subtitle.Paragraphs.Add(p);
|
|
subtitle.Renumber();
|
|
}
|
|
|
|
internal static string GetPositionInfo(string s)
|
|
{
|
|
//position: x --- 0% = left, 100%=right (horizontal)
|
|
//line: x --- 0 or -16 or 0%=top, 16 or -1 or 100% = bottom (vertical)
|
|
var pos = GetTag(s, "position:");
|
|
var line = GetTag(s, "line:");
|
|
var positionInfo = string.Empty;
|
|
bool hAlignLeft = false;
|
|
bool hAlignRight = false;
|
|
bool vAlignTop = false;
|
|
bool vAlignMiddle = false;
|
|
|
|
if (!string.IsNullOrEmpty(pos) && pos.EndsWith('%'))
|
|
{
|
|
double number;
|
|
if (double.TryParse(pos.TrimEnd('%'), out number))
|
|
{
|
|
if (number < 25)
|
|
{
|
|
hAlignLeft = true;
|
|
}
|
|
else if (number > 75)
|
|
{
|
|
hAlignRight = true;
|
|
}
|
|
}
|
|
}
|
|
|
|
if (!string.IsNullOrEmpty(line) && line.EndsWith('%'))
|
|
{
|
|
|
|
if (line.EndsWith('%'))
|
|
{
|
|
double number;
|
|
if (double.TryParse(line.TrimEnd('%'), out number))
|
|
{
|
|
if (number < 25)
|
|
{
|
|
vAlignTop = true;
|
|
}
|
|
else if (number < 75)
|
|
{
|
|
vAlignMiddle = true;
|
|
}
|
|
}
|
|
}
|
|
else
|
|
{
|
|
double number;
|
|
if (double.TryParse(line.TrimEnd('%'), out number))
|
|
{
|
|
if (number < 7)
|
|
{
|
|
vAlignTop = true;
|
|
}
|
|
else if (number < 11)
|
|
{
|
|
vAlignMiddle = true;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
if (hAlignLeft)
|
|
{
|
|
if (vAlignTop)
|
|
{
|
|
return "{\\an7}";
|
|
}
|
|
if (vAlignMiddle)
|
|
{
|
|
return "{\\an4}";
|
|
}
|
|
return "{\\an1}";
|
|
}
|
|
else if (hAlignRight)
|
|
{
|
|
if (vAlignTop)
|
|
{
|
|
return "{\\an9}";
|
|
}
|
|
if (vAlignMiddle)
|
|
{
|
|
return "{\\an6}";
|
|
}
|
|
return "{\\an3}";
|
|
}
|
|
else if (vAlignTop)
|
|
{
|
|
return "{\\an8}";
|
|
}
|
|
else if (vAlignMiddle)
|
|
{
|
|
return "{\\an5}";
|
|
}
|
|
|
|
return positionInfo;
|
|
}
|
|
|
|
private static string GetTag(string s, string tag)
|
|
{
|
|
var pos = s.IndexOf(tag, StringComparison.Ordinal);
|
|
if (pos >= 0)
|
|
{
|
|
var v = s.Substring(pos + tag.Length).Trim();
|
|
var end = v.IndexOf("%,", StringComparison.Ordinal);
|
|
if (end >= 0)
|
|
{
|
|
v = v.Remove(end + 1);
|
|
}
|
|
end = v.IndexOf(' ');
|
|
if (end >= 0)
|
|
{
|
|
v = v.Remove(end);
|
|
}
|
|
return v;
|
|
}
|
|
return null;
|
|
}
|
|
|
|
public override void RemoveNativeFormatting(Subtitle subtitle, SubtitleFormat newFormat)
|
|
{
|
|
foreach (Paragraph p in subtitle.Paragraphs)
|
|
{
|
|
if (p.Text.Contains('<'))
|
|
{
|
|
string text = p.Text;
|
|
text = RemoveTag("v", text);
|
|
text = RemoveTag("rt", text);
|
|
text = RemoveTag("ruby", text);
|
|
text = RemoveTag("c", text);
|
|
p.Text = RemoveTag("span", text);
|
|
}
|
|
}
|
|
}
|
|
|
|
public static List<string> GetVoices(Subtitle subtitle)
|
|
{
|
|
var list = new List<string>();
|
|
if (subtitle != null && subtitle.Paragraphs != null)
|
|
{
|
|
foreach (Paragraph p in subtitle.Paragraphs)
|
|
{
|
|
string s = p.Text;
|
|
var startIndex = s.IndexOf("<v ", StringComparison.Ordinal);
|
|
while (startIndex >= 0)
|
|
{
|
|
int endIndex = s.IndexOf('>', startIndex);
|
|
if (endIndex > startIndex)
|
|
{
|
|
string voice = s.Substring(startIndex + 2, endIndex - startIndex - 2).Trim();
|
|
if (!list.Contains(voice))
|
|
list.Add(voice);
|
|
}
|
|
|
|
if (startIndex == s.Length - 1)
|
|
startIndex = -1;
|
|
else
|
|
startIndex = s.IndexOf("<v ", startIndex + 1, StringComparison.Ordinal);
|
|
}
|
|
}
|
|
}
|
|
return list;
|
|
}
|
|
|
|
public static string RemoveTag(string tag, string text)
|
|
{
|
|
int indexOfTag = text.IndexOf("<" + tag + " ", StringComparison.Ordinal);
|
|
if (indexOfTag >= 0)
|
|
{
|
|
int indexOfEnd = text.IndexOf('>', indexOfTag);
|
|
if (indexOfEnd > 0)
|
|
{
|
|
text = text.Remove(indexOfTag, indexOfEnd - indexOfTag + 1);
|
|
text = text.Replace("</" + tag + ">", string.Empty);
|
|
}
|
|
}
|
|
return text;
|
|
}
|
|
|
|
private static TimeCode GetTimeCodeFromString(string time)
|
|
{
|
|
// hh:mm:ss.mmm
|
|
string[] timeCode = time.Trim().Split(':', '.', ' ');
|
|
return new TimeCode(int.Parse(timeCode[0]),
|
|
int.Parse(timeCode[1]),
|
|
int.Parse(timeCode[2]),
|
|
int.Parse(timeCode[3]));
|
|
}
|
|
|
|
}
|
|
}
|