public static bool IsAudioCd(string device)
{
int colon_idx = device.IndexOf(':');
if (colon_idx == -1)
{
throw new ArgumentException("Invalid device name", "device");
}
string filename = string.Concat(@"\\.\", device.Substring(0, colon_idx + 1));
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 IOException("Opening the CD device failed.");
}
uint ret;
CDROM_DISK_DATA cdd = new CDROM_DISK_DATA();
GCHandle handle = GCHandle.Alloc(cdd, GCHandleType.Pinned);
try {
if (!DeviceIoControl(file,
IOCTL_CDROM_DISK_TYPE,
IntPtr.Zero,
0,
handle.AddrOfPinnedObject(),
(uint)Marshal.SizeOf(cdd),
out ret,
IntPtr.Zero))
{
throw new IOException("Error reading disk type");
}
} finally {
handle.Free();
}
return((cdd.DiskData & 0x03) == CDROM_DISK_AUDIO_TRACK);
}
}
public static bool IsAudioCd(string device)
{
int colon_idx = device.IndexOf(':');
if (colon_idx == -1) {
throw new ArgumentException("Invalid device name", "device");
}
string filename = string.Concat(@"\\.\", device.Substring(0, colon_idx + 1));
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 IOException("Opening the CD device failed.");
uint ret;
CDROM_DISK_DATA cdd = new CDROM_DISK_DATA();
GCHandle handle = GCHandle.Alloc(cdd, GCHandleType.Pinned);
try {
if (!DeviceIoControl(file,
IOCTL_CDROM_DISK_TYPE,
IntPtr.Zero,
0,
handle.AddrOfPinnedObject(),
(uint)Marshal.SizeOf(cdd),
out ret,
IntPtr.Zero))
throw new IOException("Error reading disk type");
} finally {
handle.Free();
}
return ((cdd.DiskData & 0x03) == CDROM_DISK_AUDIO_TRACK);
}
}
