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using System;
using System.Collections.Generic;
using System.Globalization;
using System.IO;
using System.Text;
using System.Threading;
using MediaBrowser.MediaEncoding.Subtitles;
using MediaBrowser.Model.MediaInfo;
using Microsoft.Extensions.Logging.Abstractions;
using Xunit;
namespace Jellyfin.MediaEncoding.Subtitles.Tests
{
public class SsaParserTests
{
// commonly shared invariant value between tests, assumes default format order
private const string InvariantDialoguePrefix = "[Events]\nDialogue: ,0:00:00.00,0:00:00.01,,,,,,,";
private readonly SsaParser _parser = new SsaParser(new NullLogger<AssParser>());
[Theory]
[InlineData("[EvEnTs]\nDialogue: ,0:00:00.00,0:00:00.01,,,,,,,text", "text")] // label casing insensitivity
[InlineData("[Events]\n,0:00:00.00,0:00:00.01,,,,,,,labelless dialogue", "labelless dialogue")] // no "Dialogue:" label, it is optional
// TODO: Fix upstream
// [InlineData("[Events]\nFormat: Text, Start, End, Layer, Effect, Style\nDialogue: reordered text,0:00:00.00,0:00:00.01", "reordered text")] // reordered formats
[InlineData(InvariantDialoguePrefix + "Cased TEXT", "Cased TEXT")] // preserve text casing
[InlineData(InvariantDialoguePrefix + " text ", " text ")] // do not trim text
[InlineData(InvariantDialoguePrefix + "text, more text", "text, more text")] // append excess dialogue values (> 10) to text
[InlineData(InvariantDialoguePrefix + "start {\\fnFont Name}text{\\fn} end", "start <font face=\"Font Name\">text</font> end")] // font name
[InlineData(InvariantDialoguePrefix + "start {\\fs10}text{\\fs} end", "start <font size=\"10\">text</font> end")] // font size
[InlineData(InvariantDialoguePrefix + "start {\\c&H112233}text{\\c} end", "start <font color=\"#332211\">text</font> end")] // color
// TODO: Fix upstream
// [InlineData(InvariantDialoguePrefix + "start {\\1c&H112233}text{\\1c} end", "start <font color=\"#332211\">text</font> end")] // primay color
// [InlineData(InvariantDialoguePrefix + "start {\\fnFont Name}text1 {\\fs10}text2{\\fs}{\\fn} {\\1c&H112233}text3{\\1c} end", "start <font face=\"Font Name\">text1 <font size=\"10\">text2</font></font> <font color=\"#332211\">text3</font> end")] // nested formatting
public void Parse(string ssa, string expectedText)
{
using (Stream stream = new MemoryStream(Encoding.UTF8.GetBytes(ssa)))
{
SubtitleTrackInfo subtitleTrackInfo = _parser.Parse(stream, CancellationToken.None);
SubtitleTrackEvent actual = subtitleTrackInfo.TrackEvents[0];
Assert.Equal(expectedText, actual.Text);
}
}
[Theory]
[MemberData(nameof(Parse_MultipleDialogues_TestData))]
public void Parse_MultipleDialogues(string ssa, IReadOnlyList<SubtitleTrackEvent> expectedSubtitleTrackEvents)
{
using (Stream stream = new MemoryStream(Encoding.UTF8.GetBytes(ssa)))
{
SubtitleTrackInfo subtitleTrackInfo = _parser.Parse(stream, CancellationToken.None);
Assert.Equal(expectedSubtitleTrackEvents.Count, subtitleTrackInfo.TrackEvents.Count);
for (int i = 0; i < expectedSubtitleTrackEvents.Count; ++i)
{
SubtitleTrackEvent expected = expectedSubtitleTrackEvents[i];
SubtitleTrackEvent actual = subtitleTrackInfo.TrackEvents[i];
Assert.Equal(expected.Id, actual.Id);
Assert.Equal(expected.Text, actual.Text);
Assert.Equal(expected.StartPositionTicks, actual.StartPositionTicks);
Assert.Equal(expected.EndPositionTicks, actual.EndPositionTicks);
}
}
}
public static IEnumerable<object[]> Parse_MultipleDialogues_TestData()
{
yield return new object[]
{
@"[Events]
Format: Layer, Start, End, Text
Dialogue: ,0:00:01.18,0:00:01.85,dialogue1
Dialogue: ,0:00:02.18,0:00:02.85,dialogue2
Dialogue: ,0:00:03.18,0:00:03.85,dialogue3
",
new List<SubtitleTrackEvent>
{
new SubtitleTrackEvent("1", "dialogue1")
{
StartPositionTicks = 11800000,
EndPositionTicks = 18500000
},
new SubtitleTrackEvent("2", "dialogue2")
{
StartPositionTicks = 21800000,
EndPositionTicks = 28500000
},
new SubtitleTrackEvent("3", "dialogue3")
{
StartPositionTicks = 31800000,
EndPositionTicks = 38500000
}
}
};
}
[Fact]
public void Parse_Valid_Success()
{
using (var stream = File.OpenRead("Test Data/example.ssa"))
{
var parsed = _parser.Parse(stream, CancellationToken.None);
Assert.Single(parsed.TrackEvents);
var trackEvent = parsed.TrackEvents[0];
Assert.Equal("1", trackEvent.Id);
Assert.Equal(TimeSpan.Parse("00:00:01.18", CultureInfo.InvariantCulture).Ticks, trackEvent.StartPositionTicks);
Assert.Equal(TimeSpan.Parse("00:00:06.85", CultureInfo.InvariantCulture).Ticks, trackEvent.EndPositionTicks);
Assert.Equal("{\\pos(400,570)}Like an angel with pity on nobody", trackEvent.Text);
}
}
}
}
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