private bool TryGetWriter(string format, [NotNullWhen(true)] out ISubtitleWriter?value)
{
if (string.IsNullOrEmpty(format))
{
throw new ArgumentNullException(nameof(format));
}
if (string.Equals(format, "json", StringComparison.OrdinalIgnoreCase))
{
value = new JsonWriter();
return(true);
}
if (string.Equals(format, SubtitleFormat.SRT, StringComparison.OrdinalIgnoreCase))
{
value = new SrtWriter();
return(true);
}
if (string.Equals(format, SubtitleFormat.VTT, StringComparison.OrdinalIgnoreCase))
{
value = new VttWriter();
return(true);
}
if (string.Equals(format, SubtitleFormat.TTML, StringComparison.OrdinalIgnoreCase))
{
value = new TtmlWriter();
return(true);
}
value = null;
return(false);
}
public void TestWrite()
{
var infoSubs =
new SubtitleTrackInfo
{
TrackEvents = new List<SubtitleTrackEvent> {
new SubtitleTrackEvent {
Id = "1",
StartPositionTicks = 24000000,
EndPositionTicks = 52000000,
Text =
"[Background Music Playing]"
},
new SubtitleTrackEvent {
Id = "2",
StartPositionTicks = 157120000,
EndPositionTicks = 173990000,
Text =
"Oh my god, Watch out!<br />It's coming!!"
},
new SubtitleTrackEvent {
Id = "3",
StartPositionTicks = 257120000,
EndPositionTicks = 303990000,
Text = "[Bird noises]"
},
new SubtitleTrackEvent {
Id = "4",
StartPositionTicks = 310000000,
EndPositionTicks = 319990000,
Text =
"This text is <font color=\"red\">RED</font> and has not been positioned."
},
new SubtitleTrackEvent {
Id = "5",
StartPositionTicks = 320000000,
EndPositionTicks = 329990000,
Text =
"This is a<br />new line, as is<br />this"
},
new SubtitleTrackEvent {
Id = "6",
StartPositionTicks = 330000000,
EndPositionTicks = 339990000,
Text =
"This contains nested <b>bold, <i>italic, <u>underline</u> and <s>strike-through</s></u></i></b> HTML tags"
},
new SubtitleTrackEvent {
Id = "7",
StartPositionTicks = 340000000,
EndPositionTicks = 349990000,
Text =
"Unclosed but <b>supported HTML tags are left in, SSA italics aren't"
},
new SubtitleTrackEvent {
Id = "8",
StartPositionTicks = 350000000,
EndPositionTicks = 359990000,
Text =
"<ggg>Unsupported</ggg> HTML tags are escaped and left in, even if <hhh>not closed."
},
new SubtitleTrackEvent {
Id = "9",
StartPositionTicks = 360000000,
EndPositionTicks = 369990000,
Text =
"Multiple SSA tags are stripped"
},
new SubtitleTrackEvent {
Id = "10",
StartPositionTicks = 370000000,
EndPositionTicks = 379990000,
Text =
"Greater than (<) and less than (>) are shown"
}
}
};
var sut = new VttWriter();
if(File.Exists("testVTT.vtt"))
File.Delete("testVTT.vtt");
using (var file = File.OpenWrite("testVTT.vtt"))
{
sut.Write(infoSubs, file, CancellationToken.None);
}
var result = File.ReadAllText("testVTT.vtt");
var expectedText = File.ReadAllText(@"MediaEncoding\Subtitles\TestSubtitles\expected.vtt");
Assert.AreEqual(expectedText, result);
}
