private static IEnumerable <Track> GetTracks(Win32Functions.CDROM_TOC toc)
{
for (var i = toc.FirstTrack - 1; i < toc.LastTrack; i++)
{
if (toc.TrackData[i].Control == 0)
{
var trackNumber = toc.TrackData[i].TrackNumber;
var offset = GetStartSector(toc.TrackData[i]);
var nextTrack = toc.TrackData[i + 1];
var sectors = GetStartSector(nextTrack) - offset;
yield return(new Track(trackNumber, offset, sectors));
}
}
}
public async Task <TableOfContents> ReadTableOfContents()
{
if (!await IsCdInDrive())
{
return(null);
}
return(await Task.Run(() =>
{
var toc = new Win32Functions.CDROM_TOC();
uint bytesRead = 0;
var succes =
Win32Functions.DeviceIoControl(_driveHandle, Win32Functions.IOCTL_CDROM_READ_TOC, IntPtr.Zero, 0,
toc, (uint)Marshal.SizeOf(toc), ref bytesRead, IntPtr.Zero) != 0;
if (!succes)
{
throw new Exception("Reading the TOC failed.");
}
return TableOfContents.Create(toc);
}));
}
internal static TableOfContents Create(Win32Functions.CDROM_TOC toc)
{
var tracks = GetTracks(toc).ToList();
return(new TableOfContents(tracks));
}
