public extern static int DeviceIoControl(
SafeFileHandle hDevice,
uint dwIoControlCode,
IntPtr lpInBuffer,
uint nInBufferSize,
[Out] out CDROM_TOC lpOutBuffer,
uint nOutBufferSize,
ref uint lpBytesReturned,
IntPtr lpOverlapped);
internal DiscWin32NT(string device)
{
int colon = device.IndexOf (':');
if (colon == -1) {
throw new ArgumentException ("The device path is not valid.", "device");
}
string filename = string.Concat (@"\\.\", device.Substring (0, colon + 1));
CDROM_TOC_SESSION_DATA session = new CDROM_TOC_SESSION_DATA ();
CDROM_TOC toc = new CDROM_TOC();
using (SafeFileHandle file = CreateFile (filename, GENERIC_READ, FILE_SHARE_READ | FILE_SHARE_WRITE,
IntPtr.Zero, OPEN_EXISTING, 0, IntPtr.Zero)) {
if (file.IsInvalid) {
throw new LocalDiscException ("Could not open the CD device.");
}
uint returned;
GCHandle session_handle = GCHandle.Alloc (session, GCHandleType.Pinned);
try {
bool result = DeviceIoControl (file, IOCTL_CDROM_GET_LAST_SESSION, IntPtr.Zero, 0,
session_handle.AddrOfPinnedObject (), (uint)Marshal.SizeOf (session), out returned, IntPtr.Zero);
if (!result) {
throw new LocalDiscException ("There was a problem while reading the disc TOC.");
}
} finally {
session_handle.Free ();
}
IntPtr toc_ptr = Marshal.AllocHGlobal (Marshal.SizeOf (toc));
Marshal.StructureToPtr (toc, toc_ptr, false);
try {
bool result = DeviceIoControl (file, IOCTL_CDROM_READ_TOC, IntPtr.Zero, 0,
toc_ptr, (uint)Marshal.SizeOf (toc), out returned, IntPtr.Zero);
if (!result) {
throw new LocalDiscException ("There was a problem while reading the disc TOC.");
}
Marshal.PtrToStructure (toc_ptr, toc);
} finally {
Marshal.FreeHGlobal (toc_ptr);
}
}
first_track = toc.FirstTrack;
if (session.FirstCompleteSession != session.LastCompleteSession) {
last_track = (byte)(session.TrackData.TrackNumber - 1);
track_offsets[0] = toc.TrackData[last_track].GetSectors () - XA_INTERVAL;
} else {
last_track = toc.LastTrack;
track_offsets[0] = toc.TrackData[last_track].GetSectors ();
}
for (int i = first_track; i <= last_track; i++) {
track_offsets[i] = toc.TrackData[i - 1].GetSectors ();
}
Init ();
}
public extern static int DeviceIoControl(IntPtr hDevice, uint IoControlCode,
IntPtr InBuffer, uint InBufferSize,
[Out] CDROM_TOC OutTOC, uint OutBufferSize,
ref uint BytesReturned,
IntPtr Overlapped);
internal DiscWin32NT(string device)
{
int colon = device.IndexOf(':');
if (colon == -1)
{
throw new ArgumentException("The device path is not valid.", "device");
}
string filename = string.Concat(@"\\.\", device.Substring(0, colon + 1));
CDROM_TOC_SESSION_DATA session = new CDROM_TOC_SESSION_DATA();
CDROM_TOC toc = new CDROM_TOC();
using (SafeFileHandle file = CreateFile(filename, GENERIC_READ, FILE_SHARE_READ | FILE_SHARE_WRITE,
IntPtr.Zero, OPEN_EXISTING, 0, IntPtr.Zero)) {
if (file.IsInvalid)
{
throw new LocalDiscException("Could not open the CD device.");
}
uint returned;
GCHandle session_handle = GCHandle.Alloc(session, GCHandleType.Pinned);
try {
bool result = DeviceIoControl(file, IOCTL_CDROM_GET_LAST_SESSION, IntPtr.Zero, 0,
session_handle.AddrOfPinnedObject(), (uint)Marshal.SizeOf(session), out returned, IntPtr.Zero);
if (!result)
{
throw new LocalDiscException("There was a problem while reading the disc TOC.");
}
} finally {
session_handle.Free();
}
IntPtr toc_ptr = Marshal.AllocHGlobal(Marshal.SizeOf(toc));
Marshal.StructureToPtr(toc, toc_ptr, false);
try {
bool result = DeviceIoControl(file, IOCTL_CDROM_READ_TOC, IntPtr.Zero, 0,
toc_ptr, (uint)Marshal.SizeOf(toc), out returned, IntPtr.Zero);
if (!result)
{
throw new LocalDiscException("There was a problem while reading the disc TOC.");
}
Marshal.PtrToStructure(toc_ptr, toc);
} finally {
Marshal.FreeHGlobal(toc_ptr);
}
}
first_track = toc.FirstTrack;
if (session.FirstCompleteSession != session.LastCompleteSession)
{
last_track = (byte)(session.TrackData.TrackNumber - 1);
track_offsets[0] = toc.TrackData[last_track].GetSectors() - XA_INTERVAL;
}
else
{
last_track = toc.LastTrack;
track_offsets[0] = toc.TrackData[last_track].GetSectors();
}
for (int i = first_track; i <= last_track; i++)
{
track_offsets[i] = toc.TrackData[i - 1].GetSectors();
}
Init();
}
