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Windows Driver Kit structur - How do I get something from it
Posted: Tue Nov 06, 2007 3:39 pm
by harff182
moin, moin...
Yesterday I found on MSDN
http://msdn2.microsoft.com/en-us/library/ms809046.aspx this sttructure:
Code: Select all
typedef struct _DVD_LAYER_DESCRIPTOR {
UCHAR BookVersion : 4;
UCHAR BookType : 4;
UCHAR MinimumRate : 4;
UCHAR DiskSize : 4;
UCHAR LayerType : 4;
UCHAR TrackPath : 1;
UCHAR NumberOfLayers : 2;
UCHAR Reserved1 : 1;
UCHAR TrackDensity : 4;
UCHAR LinearDensity : 4;
ULONG StartingDataSector;
ULONG EndDataSector;
ULONG EndLayerZeroSector;
UCHAR Reserved5 : 7;
UCHAR BCAFlag : 1;
UCHAR Reserved6;
} DVD_LAYER_DESCRIPTOR, *PDVD_LAYER_DESCRIPTOR
Unfortunately I'm not good enough to write my own Procedure, that returnes the
BookType.
Is there some kind soul around, that helps me with a code?
tia... scholly
Posted: Wed Nov 07, 2007 2:14 pm
by Sparkie
I may have some code for you to try later tonight when I get home.
Posted: Wed Nov 07, 2007 2:43 pm
by harff182
Drive carefully
Posted: Wed Nov 07, 2007 3:04 pm
by Sparkie
Posted: Thu Nov 08, 2007 4:08 am
by Sparkie
Well here's what I have so far. I must admit these damn bitfield structures are a pain in the ass to work with. (Or maybe I'm making a mountain out of a molehill
) This is not fully tested but I do get some sort of results. I'll try to do some more with this tomorrow.
Maybe someone else out there has more knowledge in this area.
Code: Select all
#IOCTL_DVD_READ_STRUCTURE = $450
#FILE_DEVICE_DVD = $33
#IOCTL_DVD_BASE = #FILE_DEVICE_DVD
#METHOD_BUFFERED = 0
#FILE_READ_ACCESS = 1
#BookType_DVD_ROM = 0
#BookType_DVD_RAM = 1
#BookType_DVD_R = 2
#BookType_DVD_RW = 3
#BookType_DVD_PlusRW = 9
;...Credit for this Procedure goes to netmaestro
Procedure.s ReadBit(number.l, index.l, length)
Protected bin$
bin$=RSet(Bin(number), 32, "0")
ProcedureReturn Mid(bin$, 32-index, length)
EndProcedure
;..Credit for this Procedure goes to KarlKox
Procedure.l CTL_CODE(DeviceType, Function, Method, Access)
ProcedureReturn ((DeviceType) << 16) | ((Access) << 14) | ((Function) << 2) | (Method)
EndProcedure
IOCTL_DVD_READ_STRUCTURE = CTL_CODE(#IOCTL_DVD_BASE, $0450, #METHOD_BUFFERED, #FILE_READ_ACCESS)
Structure _DVD_READ_STRUCTURE
BlockByteOffset.LARGE_INTEGER
Format.l
SessionId.l
LayerNumber.l
EndStructure
Structure _DVD_LAYER_DESCRIPTOR
dummy.l
Flags1.l
StartingDataSector.l
EndDataSector.l
EndLayerZeroSector.l
Flags2.b
Reserved6.l
EndStructure
drive$ = "f"
hDevice = CreateFile_("\\.\" + drive$ + ":",#GENERIC_READ, #FILE_SHARE_READ, 0, #OPEN_EXISTING, 0, 0)
If hDevice
DeviceIoControl_(hDevice, IOCTL_DVD_READ_STRUCTURE, drs._DVD_READ_STRUCTURE, SizeOf(_DVD_READ_STRUCTURE), @dld._DVD_LAYER_DESCRIPTOR, SizeOf(_DVD_LAYER_DESCRIPTOR)+1, @returned, 0)
CloseHandle_(hDevice)
BookVersion.s = ReadBit(dld\Flags1, 0, 4)
BookType.s = ReadBit(dld\Flags1, 4, 4)
MinimumRate.s = ReadBit(dld\Flags1, 8, 4)
DiskSize.s = ReadBit(dld\Flags1, 12, 4)
LayerType.s = ReadBit(dld\Flags1, 16, 4)
TrackPath.s = ReadBit(dld\Flags1, 20, 1)
NumberOfLayers.s = ReadBit(dld\Flags1, 21, 2)
TrackDensity.s = ReadBit(dld\Flags1, 0, 4)
LinearDensity.s = ReadBit(dld\Flags1, 4, 4)
StartingDataSector = dld\StartingDataSector
EndDataSector = dld\EndDataSector
EndLayerZeroSector = dld\EndLayerZeroSector
BCAFlag.s = ReadBit(dld\Flags2, 7, 1)
Debug "BookVersion " + BookVersion
Debug "BookType " + BookType
Debug "MinimumRate " + MinimumRate
Debug "DiskSize " + DiskSize
Debug "LayerType " + LayerType
Debug "TrackPath " + TrackPath
Debug "NumberOfLayers " + NumberOfLayers
Debug "TrackDensity " + TrackDensity
Debug "LinearDensity " + LinearDensity
Debug "StartingDataSector " + Hex(StartingDataSector)
Debug "EndDataSector " + Hex(EndDataSector)
Debug "EndLayerZeroSector " + Hex(EndLayerZeroSector)
Debug "BCAFlag " + BCAFlag
EndIf
End
Posted: Thu Nov 08, 2007 11:55 am
by harff182
As soon as
I get home, I will try it with all different kind of media I have.
And yes, I will also drive carefully
thanks so far... scholly
Posted: Thu Nov 08, 2007 7:43 pm
by harff182
Sparkie wrote: (Or maybe I'm making a mountain out of a molehill
)
I hope I didn't show you the wrong track.
I'm programming a database for moviefiles, like MediaMonkey for MP3 and will most probably give the source to the community because of the large amount of help I've already gotten.
When I discovered MediaInfo.dll to get some infos directly from the moviefiles, I decided to try the same with the media they are on. I'm not that good when it comes to do researches, but I found 4 ways to get these infos on optical media:
1.
WMI / Win32_PhysicalMedia, from
http://msdn2.microsoft.com/en-us/library/aa394346.aspx
Problem: Neither with PB nor VBS or the M$-tools(Scriptomatic, WMI Code Creator) I was able to retrieve the promised infos.
2.
IMAPI2, from
http://msdn2.microsoft.com/en-us/library/aa364821.aspx]
I played a little bit with the VBS, but my knowledge is too small to use it frop within PB using the 2 libs from PureArea.net.
I also discovered, that the recognition only seems to work correctly with EMPTY Media.
3.
Book Type Field, from
http://en.wikipedia.org/wiki/Book_type
I found no infos, how to read the lead-in from a CD/DVD from within PB.
Or I just don't understand similar code.
4.
Windows Driver Kit, from
http://msdn2.microsoft.com/en-us/library/ms809046.aspx
Here we are at the end of a small story, that possibly nobody is interested in
Back to your code:
It works, but some results are unexpected:
Code: Select all
Mediumtyp |DVD-ROM|DVD-RAM|DVD-R|DVD-R DL|DVD-RW|DVD+RW|DVD+R|DVD+RW DL|DVD+R DL|
----------------+-------+-------+-----+--------+------+------+-----+---------+--------+
Wikipedia bin |0000 |0001 |0010 |0010 |0011 |1001 |1010 |1101 |1110 |
Wikipedia dec |0 |1 |2 |2 |3 |9 |10 |13 |15 |
DVD_Layer_Descr |0 |1 |2 |-- |3 |9 |-- |-- |-- |
----------------+-------+-------+-----+--------+------+------+-----+---------+--------+
Sparkie.pb ;) |0000 |1011 |0010 | ------ |------|1001 |0000 |---------|--------|
----------------+-------+-------+-----+--------+------+------+-----+---------+--------+
DVDInfoBookType |DVD-ROM|DVD-RAM|DVD-R| ------ |------|DVD+RW|DVD+R|---------|--------|
DVDInfoMediaType|DVD-ROM|DVD-RAM|DVD-R| ------ |------|DVD+RW|DVD+R|---------|--------|
----------------+-------+-------+-----+--------+------+------+-----+---------+--------+
cdrecord |DVD-ROM|DVD-RAM|DVD-R| ------ |------|DVD+RW|DVD+R|---------|--------|
----------------+-------+-------+-----+--------+------+------+-----+---------+--------+
DVDInfo: DVD+Rx4 get the BookType DVD-ROM, while DVD+Rx8 geht DVD+R. Weird.
I don't use or have all of the possible Media but I'll try to buy and burn a single one for the missing ones the next days.
back to coding... scholly
Posted: Thu Nov 08, 2007 8:02 pm
by Sparkie
Well it looks like the code works at least a little
bit
I do not do much with DVD's, so testing on my side will be difficult at best. I'll get back to Googling tonight and see if I can make any improvements to the code.
Posted: Wed Nov 14, 2007 11:15 pm
by Sparkie
I don't know about this one. After hours (days) of tinkering with this code, I just can't get the correct results. I'm guessing that the structure bitfields are not being handled properly. I've tried right to left...left to right...nuth'n works here for me.
Posted: Fri Nov 16, 2007 12:27 pm
by harff182
So I think we may close the thread for now.
Yesterday evening I testet 6 different Disks of every DVD-Type I have used and always got the same results.
Even if you/I expected other values because of the docs, I think I can use your code successfully (to replace the use of cdrecord) as long as no better solution comes around.
Since my database is primarily for me and 2 friends, I don't await problems - even if they get other/different results because of other media/burner/software, I can rework the code.
And when I release the code to public, I'll point to this thread, so interested people may understand the trouble.
Sparkie, thanks for your helpfull efforts...
scholly
