public void ReadsSegmentInfo()
{
var stream = new MemoryStream();
var writer = new EbmlWriter(stream);
using (var segment = writer.StartMasterElement(MatroskaDtd.Segment.Identifier))
{
using (var segmentInfo = segment.StartMasterElement(MatroskaDtd.Segment.Info.Identifier))
{
segmentInfo.WriteUtf(MatroskaDtd.Segment.Info.Title.Identifier, "Test data");
segmentInfo.WriteUtf(MatroskaDtd.Segment.Info.WritingApp.Identifier, "writing app");
segmentInfo.WriteUtf(MatroskaDtd.Segment.Info.MuxingApp.Identifier, "mux app");
segmentInfo.Write(MatroskaDtd.Segment.Info.Duration.Identifier, 1234f);
}
// write some dummy data
segment.Write(VInt.MakeId(123), 0);
}
stream.Position = 0;
var infoReader = new SegmentInfoUpdater();
infoReader.Open(stream);
Assert.AreEqual("Test data", infoReader.Title);
Assert.AreEqual("writing app", infoReader.WritingApp);
Assert.AreEqual("mux app", infoReader.MuxingApp);
Assert.AreEqual(TimeSpan.FromMilliseconds(1234), infoReader.Duration);
}
public void ReusesNextFiller()
{
var stream = new MemoryStream();
var writer = new EbmlWriter(stream);
writer.Write(VInt.MakeId(122), 321);
using (var segment = writer.StartMasterElement(MatroskaDtd.Segment.Identifier))
{
using (var segmentInfo = segment.StartMasterElement(MatroskaDtd.Segment.Info.Identifier))
{
segmentInfo.WriteUtf(MatroskaDtd.Segment.Info.Title.Identifier, "Test data");
}
// write some dummy data
segment.Write(StandardDtd.Void.Identifier, new byte[1000]);
segment.Write(VInt.MakeId(123), 123); // marker
}
stream.Position = 0;
// act
var infoReader = new SegmentInfoUpdater();
infoReader.Open(stream);
infoReader.Title = new string('a', 500);
infoReader.Write();
// verify the stream is correct
stream.Position = 0;
var reader = new EbmlReader(stream);
reader.ReadNext();
Assert.AreEqual(122, reader.ElementId.Value, "start marker");
Assert.AreEqual(321, reader.ReadInt());
reader.ReadNext();
Assert.AreEqual(MatroskaDtd.Segment.Identifier, reader.ElementId);
reader.EnterContainer();
reader.ReadNext();
Assert.AreEqual(MatroskaDtd.Segment.Info.Identifier, reader.ElementId);
Assert.Greater(reader.ElementSize, 500);
reader.ReadNext();
Assert.AreEqual(StandardDtd.Void.Identifier, reader.ElementId);
reader.ReadNext();
Assert.AreEqual(123, reader.ElementId.Value, "end data marker");
Assert.AreEqual(123, reader.ReadInt());
}