SCSI Library in C# - Burn CDs and DVDs, Access Hard Disks, etc.

using System;
using System.Collections.Generic;
using System.IO;
using System.Diagnostics;

namespace SCSI.Multimedia
{
	public class SCSIStream : Stream
	{
		[DebuggerBrowsable(DebuggerBrowsableState.Never)]
		private long _Position;

		/// <summary>Leaves the device open!</summary>
		public SCSIStream(SCSIDevice device) { this.Device = device; }

		public SCSIDevice Device { get; private set; }

		protected override void Dispose(bool disposing) { if (disposing) { this.Flush(); this.Device = null; } base.Dispose(disposing); }

		public override bool CanRead { get { return true; } }

		public override bool CanSeek { get { return true; } }

		public override bool CanWrite { get { return true; } }

		public override void Flush() { this.Device.SynchronizeCache(new SynchronizeCache10Command()); }

		public override long Length { get { return this.Device.Capacity.LogicalBlockAddress * this.Device.Capacity.BlockLength; } }

		public override long Position { get { return this._Position; } set { this._Position = value; } }

		public override int Read(byte[] buffer, int offset, int count)
		{
			long pos = this.Position;
			if (pos % this.Device.Capacity.BlockLength != 0) { throw new DataMisalignedException(); }
			this.Device.Read10(new Read10Command(false, (uint)(pos / this.Device.Capacity.BlockLength), (ushort)count), buffer, offset);
			return count;
		}

		public override long Seek(long offset, SeekOrigin origin)
		{
			long newPos;
			if (origin == SeekOrigin.Begin)
			{
				if (offset % this.Device.Capacity.BlockLength != 0) { throw new DataMisalignedException(); }
				newPos = offset / this.Device.Capacity.BlockLength;
				this.Device.Seek10(new Seek10Command(checked((uint)newPos)));
			}
			else { throw new NotImplementedException(); }
			this._Position = newPos;
			return this._Position;
		}

		public override void SetLength(long value) { throw new NotImplementedException(); }

		public override void Write(byte[] buffer, int offset, int count)
		{
			long pos = this._Position;
			if (pos % this.Device.Capacity.BlockLength != 0) { throw new DataMisalignedException(); }
			unsafe
			{
				fixed (byte* pBuffer = &buffer[offset])
				{
					var buf = new Helper.BufferWithSize(pBuffer, buffer.Length - offset).ExtractSegment(0, count);
					this.Device.Write10(new Write10Command(false, (uint)(pos / this.Device.Capacity.BlockLength)), buf);
				}
			}
			this._Position = pos + count;
		}
	}
}