public override long Seek(long offset, SeekOrigin origin)
{
if (!CanSeek)
{
throw new NotSupportedException();
}
Console.WriteLine("seeking from origin " + origin + " to offset " + offset);
long newPos = 0;
switch (origin)
{
case SeekOrigin.Begin:
newPos = offset;
break;
case SeekOrigin.Current:
newPos = Position + offset;
break;
case SeekOrigin.End:
newPos = Length + offset;
break;
}
long streamLengthSum = 0;
int streamIndex = 0;
while (streamLengthSum + subStreams[streamIndex].Length < newPos)
{
streamLengthSum += subStreams[streamIndex].Length;
streamIndex++;
}
if (CurrentSubStreamIndex != streamIndex)
{
CurrentSubStreamIndex = streamIndex;
}
CurrentSubStream.Seek(newPos - streamLengthSum, SeekOrigin.Begin);
return(Position);
}
