public override VirtualDisk OpenDisk(FileLocator locator, string path, FileAccess access)
{
OpticalFormat format = path.EndsWith(".bin", StringComparison.OrdinalIgnoreCase) ? OpticalFormat.Mode2 : OpticalFormat.Mode1;
FileShare share = access == FileAccess.Read ? FileShare.Read : FileShare.None;
return(new Disc(locator.Open(path, FileMode.Open, access, share), Ownership.Dispose, format));
}
/// <summary>
/// Initializes a new instance of the DiscImageFile class.
/// </summary>
/// <param name="stream">The stream to interpret.</param>
/// <param name="ownsStream">Indicates if the new instance should control the lifetime of the stream.</param>
/// <param name="format">The disc image format.</param>
public DiscImageFile(Stream stream, Ownership ownsStream, OpticalFormat format)
{
if (ownsStream == Ownership.Dispose)
{
_toDispose = stream;
}
if (format == OpticalFormat.None)
{
if (stream.Length % Mode1SectorSize == 0 && stream.Length % Mode2SectorSize != 0)
{
_format = OpticalFormat.Mode1;
}
else if (stream.Length % Mode1SectorSize != 0 && stream.Length % Mode2SectorSize == 0)
{
_format = OpticalFormat.Mode2;
}
else
{
throw new IOException("Unable to detect optical disk format");
}
}
else
{
_format = format;
}
Content = stream as SparseStream;
if (Content == null)
{
Content = SparseStream.FromStream(stream, Ownership.None);
}
if (_format == OpticalFormat.Mode2)
{
Mode2Buffer converter = new Mode2Buffer(new StreamBuffer(Content, Ownership.None));
Content = new BufferStream(converter, FileAccess.Read);
}
}
/// <summary>
/// Initializes a new instance of the DiscImageFile class.
/// </summary>
/// <param name="stream">The stream to interpret</param>
/// <param name="ownsStream">Indicates if the new instance should control the lifetime of the stream.</param>
/// <param name="format">The disc image format</param>
public DiscImageFile(Stream stream, Ownership ownsStream, OpticalFormat format)
{
if (ownsStream == Ownership.Dispose)
{
_toDispose = stream;
}
if (format == OpticalFormat.None)
{
if ((stream.Length % Mode1SectorSize) == 0 && (stream.Length % Mode2SectorSize) != 0)
{
_format = OpticalFormat.Mode1;
}
else if ((stream.Length % Mode1SectorSize) != 0 && (stream.Length % Mode2SectorSize) == 0)
{
_format = OpticalFormat.Mode2;
}
else
{
throw new IOException("Unable to detect optical disk format");
}
}
else
{
_format = format;
}
_content = stream as SparseStream;
if (_content == null)
{
_content = SparseStream.FromStream(stream, Ownership.None);
}
if (_format == OpticalFormat.Mode2)
{
Mode2Buffer converter = new Mode2Buffer(new StreamBuffer(_content, Ownership.None));
_content = new BufferStream(converter, FileAccess.Read);
}
}
/// <summary>
/// Initializes a new instance of the Disc class.
/// </summary>
/// <param name="stream">The stream to read</param>
/// <param name="ownsStream">Indicates if the new instance should control the lifetime of the stream.</param>
/// <param name="format">The disk image format</param>
public Disc(Stream stream, Ownership ownsStream, OpticalFormat format)
{
_file = new DiscImageFile(stream, ownsStream, format);
}
/// <summary>
/// Initializes a new instance of the Disc class.
/// </summary>
/// <param name="stream">The stream to read</param>
/// <param name="ownsStream">Indicates if the new instance should control the lifetime of the stream.</param>
/// <param name="format">The disk image format</param>
public Disc(Stream stream, Ownership ownsStream, OpticalFormat format)
{
_file = new DiscImageFile(stream, ownsStream, format);
}
