IOCTL_DVD_READ_STRUCTURE IOCTL (ntddcdvd.h)
Returns information about a DVD disc, such as a layer descriptor, copyright information, or manufacturer-specific information.
Major code
Input buffer
The buffer at Irp->AssociatedIrp.SystemBuffer contains a DVD_READ_STRUCTURE structure that indicates the session ID and type of information to return.
Input buffer length
Length of a DVD_READ_STRUCTURE.
Output buffer
The driver returns the disc information in the buffer at Irp->AssociatedIrp.SystemBuffer.
Output buffer length
Parameters.DeviceIoControl.OutputBufferLength in the I/O stack location indicates the size, in bytes, of the buffer, which must be >= sizeof(Descriptor) where Descriptor is DVD_LAYER_DESCRIPTOR, DVD_COPYRIGHT_DESCRIPTOR, DVD_DISK_KEY_DESCRIPTOR, DVD_BCA_DESCRIPTOR, or DVD_MANUFACTURER_DESCRIPTOR.
Status block
The Information field is set to the number of bytes transferred. The Status field is set to STATUS_SUCCESS, or possibly to STATUS_INSUFFICIENT_RESOURCES.
Requirements
| Requirement | Value |
|---|---|
| Header | ntddcdvd.h (include Ntddcdvd.h) |