/// <summary>Standard constructor</summary>
/// <param name="index">the index</param>
/// <param name="source">the source</param>
/// <param name="offset">the offset of the source in the GroupedRandomAccessSource</param>
public SourceEntry(int index, IRandomAccessSource source, long offset)
{
this.index = index;
this.source = source;
this.firstByte = offset;
this.lastByte = offset + source.Length() - 1;
}
/// <summary>Constructs a new OffsetRandomAccessSource</summary>
/// <param name="source">the source</param>
public GetBufferedRandomAccessSource(IRandomAccessSource source)
{
this.source = source;
this.getBuffer = new byte[(int)Math.Min(Math.Max(source.Length() / 4, 1), 4096)];
this.getBufferStart = -1;
this.getBufferEnd = -1;
}
public override long Seek(long offset, SeekOrigin origin)
{
switch (origin)
{
case SeekOrigin.Begin:
position = offset;
break;
case SeekOrigin.Current:
position += offset;
break;
default:
position = offset + source.Length();
break;
}
return(position);
}
/// <summary>Constructs a new OffsetRandomAccessSource that extends to the end of the underlying source</summary>
/// <param name="source">the source</param>
/// <param name="offset">the amount of the offset to use</param>
public WindowRandomAccessSource(IRandomAccessSource source, long offset)
: this(source, offset, source.Length() - offset)
{
}
/// <summary><inheritDoc/></summary>
public virtual long Length()
{
return(source.Length());
}
public virtual long Length()
{
lock (lockObj) {
return(source.Length());
}
}