public void ReadWriteStringUtf(string value)
{
_writer.WriteUtf(ElementId, value);
var reader = StartRead();
Assert.Equal(value, reader.ReadUtf());
}
public void WriteStringBadArg(WriteStrMode mode, string value)
{
Assert.Throws <ArgumentNullException>(() => {
if (mode == WriteStrMode.Ascii)
{
_writer.WriteAscii(ElementId, value);
}
if (mode == WriteStrMode.Utf)
{
_writer.WriteUtf(ElementId, value);
}
});
}
public void ReadWriteContainer()
{
var innerdata = new MemoryStream();
var container = new EbmlWriter(innerdata);
container.WriteUtf(VInt.MakeId(1), "Hello");
container.Write(VInt.MakeId(2), 12345);
container.Write(VInt.MakeId(3), 123.45);
_writer.Write(VInt.MakeId(5), innerdata.ToArray());
_writer.WriteUtf(VInt.MakeId(6), "end");
_stream.Position = 0;
var reader = new EbmlReader(_stream);
Assert.True(reader.ReadNext());
Assert.Equal(VInt.MakeId(5), reader.ElementId);
reader.EnterContainer();
// reading inner data
AssertRead(reader, 1, "Hello", r => r.ReadUtf());
AssertRead(reader, 2, 12345, r => r.ReadInt());
AssertRead(reader, 3, 123.45, r => r.ReadFloat());
reader.LeaveContainer();
// back to main stream
AssertRead(reader, 6, "end", r => r.ReadUtf());
}
private void WriteData()
{
var reader = new EbmlReader(new MemoryStream(_oldSegmentInfoData), _oldSegmentInfoData.Length);
// prepare writing part
var infoStream = new MemoryStream();
var infoWriter = new EbmlWriter(infoStream);
var writeMap = new[]
{
new { Id = MatroskaDtd.Segment.Info.Title.Identifier, Value = _title },
new { Id = MatroskaDtd.Segment.Info.WritingApp.Identifier, Value = _writingApp },
};
// enter the Segment block
reader.ReadNext();
reader.EnterContainer();
while (reader.ReadNext())
{
if (!writeMap.Any(arg => arg.Id == reader.ElementId))
{
// copying data as is
var buffer = new byte[reader.ElementSize];
reader.ReadBinary(buffer, 0, (int)reader.ElementSize);
infoWriter.Write(reader.ElementId, buffer);
}
}
// write title/app in case it was not present!
foreach (var e in writeMap.Where(arg => !string.IsNullOrEmpty(arg.Value)))
{
infoWriter.WriteUtf(e.Id, e.Value);
}
var outStream = new MemoryStream(_dataLength);
var writer = new EbmlWriter(outStream);
writer.Write(MatroskaDtd.Segment.Info.Identifier, infoStream.ToArray());
var extraByteCount = _dataLength - outStream.Position;
if (extraByteCount != 0)
{
var extraHLen = StandardDtd.Void.Identifier.Length + 2;
var blankDataLen = (int)(extraByteCount - extraHLen);
if (blankDataLen < 0)
{
throw new InvalidOperationException(string.Format("Not enough space to put the new data, {0} bytes to feet", -blankDataLen));
}
writer.WriteElementHeader(StandardDtd.Void.Identifier, VInt.EncodeSize((ulong)blankDataLen, 2));
writer.Write(new byte[blankDataLen], 0, blankDataLen);
}
if (outStream.Length != _dataLength)
{
throw new InvalidOperationException("Failed to prepare modified data - block length mismatch");
}
_stream.Position = _dataStart;
_stream.Write(outStream.ToArray(), 0, _dataLength);
}
