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implemented SSA Parser

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This commit is contained in:
Luis Miguel Almánzar 2014-05-11 00:23:16 -04:00
parent f2237b858a
commit 8a8e272cb7
4 changed files with 141 additions and 3 deletions
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58
MediaBrowser.MediaEncoding/Subtitles/SsaParser.cs
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@ -1,17 +1,69 @@
using System;
using System.Collections.Generic;
using System.Globalization;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Text.RegularExpressions;
namespace MediaBrowser.MediaEncoding.Subtitles
{
public class SsaParser : ISubtitleParser
{
private readonly CultureInfo _usCulture = new CultureInfo("en-US");
public SubtitleTrackInfo Parse(Stream stream)
{
throw new NotImplementedException();
var trackInfo = new SubtitleTrackInfo();
var eventIndex = 1;
using (var reader = new StreamReader(stream))
{
string line;
while (reader.ReadLine() != "[Events]")
{}
var headers = ParseFieldHeaders(reader.ReadLine());
while ((line = reader.ReadLine()) != null)
{
if (string.IsNullOrWhiteSpace(line))
{
continue;
}
if(line.StartsWith("["))
break;
if(string.IsNullOrEmpty(line))
continue;
var subEvent = new SubtitleTrackEvent { Id = eventIndex.ToString(_usCulture) };
eventIndex++;
var sections = line.Substring(10).Split(',');
subEvent.StartPositionTicks = GetTicks(sections[headers["Start"]]);
subEvent.EndPositionTicks = GetTicks(sections[headers["End"]]);
subEvent.Text = string.Join(",", sections.Skip(headers["Text"]));
subEvent.Text = Regex.Replace(subEvent.Text, "\\{(\\\\[\\w]+\\(?([\\w\\d]+,?)+\\)?)+\\}", string.Empty, RegexOptions.IgnoreCase);
subEvent.Text = Regex.Replace(subEvent.Text, @"\\N", "<br />", RegexOptions.IgnoreCase);
trackInfo.TrackEvents.Add(subEvent);
}
}
return trackInfo;
}
long GetTicks(string time)
{
TimeSpan span;
return TimeSpan.TryParseExact(time, @"h\:mm\:ss\.ff", _usCulture, out span)
? span.Ticks: 0;
}
private Dictionary<string,int> ParseFieldHeaders(string line) {
var fields = line.Substring(8).Split(',').Select(x=>x.Trim()).ToList();
var result = new Dictionary<string, int> {
{"Start", fields.IndexOf("Start")},
{"End", fields.IndexOf("End")},
{"Text", fields.IndexOf("Text")}
};
return result;
}
}
}

4
MediaBrowser.Tests/MediaBrowser.Tests.csproj
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@ -50,6 +50,7 @@
</Otherwise>
</Choose>
<ItemGroup>
<Compile Include="MediaEncoding\Subtitles\SsaParserTests.cs" />
<Compile Include="MediaEncoding\Subtitles\SrtParserTests.cs" />
<Compile Include="Providers\MovieDbProviderTests.cs" />
<Compile Include="Resolvers\MovieResolverTests.cs" />
@ -83,6 +84,9 @@
<None Include="app.config" />
</ItemGroup>
<ItemGroup>
<None Include="MediaEncoding\Subtitles\TestSubtitles\data.ssa">
<CopyToOutputDirectory>Always</CopyToOutputDirectory>
</None>
<None Include="MediaEncoding\Subtitles\TestSubtitles\unit.srt">
<CopyToOutputDirectory>Always</CopyToOutputDirectory>
</None>

59
MediaBrowser.Tests/MediaEncoding/Subtitles/SsaParserTests.cs Normal file
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@ -0,0 +1,59 @@
using System;
using System.Collections.Generic;
using System.IO;
using MediaBrowser.MediaEncoding.Subtitles;
using Microsoft.VisualStudio.TestTools.UnitTesting;
namespace MediaBrowser.Tests.MediaEncoding.Subtitles {
[TestClass]
public class SsaParserTests {
[TestMethod]
public void TestParse() {
var expectedSubs =
new SubtitleTrackInfo {
TrackEvents = new List<SubtitleTrackEvent> {
new SubtitleTrackEvent {
Id = "1",
StartPositionTicks = 24000000,
EndPositionTicks = 72000000,
Text =
"Senator, we're <br />making our final <br />approach into Coruscant."
},
new SubtitleTrackEvent {
Id = "2",
StartPositionTicks = 97100000,
EndPositionTicks = 133900000,
Text =
"Very good, Lieutenant."
},
new SubtitleTrackEvent {
Id = "3",
StartPositionTicks = 150400000,
EndPositionTicks = 180400000,
Text = "It's <br />a <br />trap!"
}
}
};
var sut = new SsaParser();
var stream = File.OpenRead(@"MediaEncoding\Subtitles\TestSubtitles\data.ssa");
var result = sut.Parse(stream);
Assert.IsNotNull(result);
Assert.AreEqual(expectedSubs.TrackEvents.Count,result.TrackEvents.Count);
for (int i = 0; i < expectedSubs.TrackEvents.Count; i++)
{
Assert.AreEqual(expectedSubs.TrackEvents[i].Id, result.TrackEvents[i].Id);
Assert.AreEqual(expectedSubs.TrackEvents[i].StartPositionTicks, result.TrackEvents[i].StartPositionTicks);
Assert.AreEqual(expectedSubs.TrackEvents[i].EndPositionTicks, result.TrackEvents[i].EndPositionTicks);
Assert.AreEqual(expectedSubs.TrackEvents[i].Text, result.TrackEvents[i].Text);
}
}
}
}

23
MediaBrowser.Tests/MediaEncoding/Subtitles/TestSubtitles/data.ssa Normal file
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@ -0,0 +1,23 @@
[Script Info]
Title: Testing subtitles for the SSA Format
[V4 Styles]
Format: Name, Fontname, Fontsize, PrimaryColour, SecondaryColour, TertiaryColour, BackColour, Bold, Italic, BorderStyle, Outline, Shadow, Alignment, MarginL, MarginR, MarginV, AlphaLevel, Encoding
Style: Default,Arial,20,65535,65535,65535,-2147483640,-1,0,1,3,0,2,30,30,30,0,0
Style: Titre_episode,Akbar,140,15724527,65535,65535,986895,-1,0,1,1,0,3,30,30,30,0,0
Style: Wolf main,Wolf_Rain,56,15724527,15724527,15724527,4144959,0,0,1,1,2,2,5,5,30,0,0
[Events]
Format: Layer, Start, End, Style, Name, MarginL, MarginR, MarginV, Effect, Text
Dialogue: 0,0:00:02.40,0:00:07.20,Default,,0000,0000,0000,,Senator, {\kf89}we're \Nmaking our final \napproach into Coruscant.
Dialogue: 0,0:00:09.71,0:00:13.39,Default,,0000,0000,0000,,{\pos(400,570)}Very good, Lieutenant.
Dialogue: 0,0:00:15.04,0:00:18.04,Default,,0000,0000,0000,,It's \Na \ntrap!
[Pictures]
This section will be ignored
[Fonts]
This section will be ignored