#1 Burning Software

1. How to know if the disc is blank (no track or has one blank track )?

2.Can i get total space and free space (MB) of the disc?

3. If do a quik erase how to get the process progress ?

Thank you.

Hi,



Check m__UCHAR__DiscStatus of DISC_INFORMATION.
It will have one blank track.



Check m__LONG__FreeLBs of TRACK_INFORMATION
To known total space you need to convert m__UCHAR__LastPossibleStartTime of DISC_INFORMATION to unsigned long.



You need to get current write speed and multiply it to the size of TOC.

Q2:
Convert m__UCHAR__LastPossibleStartTime(Packed Array[ 1..4 ] Of Byte;) to unsigned long,
I'm sorry ,I still do not know how to Convert.

Q3.Which parameter point out the size of TOC?

TOC_INFORMATION = Packed Record
m__BOOLEAN__IsValid : Boolean;
m__BOOLEAN__IsDVD : Boolean;
m__USHORT__ProtectedDVDRegions : Word;
m__UCHAR__BusKeyForDiscKey : Packed Array[ 1..5 ] Of Byte;
m__UCHAR__NumberOfSessions : Byte;
m__UCHAR__NumberOfTracks : Byte;
m__UCHAR__NumberOfUnsortedEntries : Byte;
m__TOC_ENTRY : Packed Array[ 1..NUMBER_OF_TRACKS ] Of TOC_ENTRY;
m__FULL_TOC_ENTRY_RAW : Packed Array[ 1..NUMBER_OF_TRACKS ] Of FULL_TOC_ENTRY_RAW;
m__FULL_TOC_ENTRY_RAW__Unsorted : Packed Array[ 1..NUMBER_OF_TRACKS ] Of FULL_TOC_ENTRY_RAW;
End;

(
(m__UCHAR__LastPossibleStartTime[4]<<24) +
(m__UCHAR__LastPossibleStartTime[3]<<16) +
(m__UCHAR__LastPossibleStartTime[2]<<8) +
(m__UCHAR__LastPossibleStartTime[1])
)



Size of TOC = 15MB.
But, sorry, It was my mistake. To calculate the time of Fast Erase you should divide 15Mb by your current write speed.
This is true only for FAST erasing. For FULL erasing the write speed may vary during erasing process.

Q2; I have tested


(m__UCHAR__LastPossibleStartTime[4]<<24) +
(m__UCHAR__LastPossibleStartTime[3]<<16) +
(m__UCHAR__LastPossibleStartTime[2]<<8 +
(m__UCHAR__LastPossibleStartTime[1])


I got 0 from CD-R(full of data) and DVD-RW(blank) , i think if you add
a parameter in DISC_INFORMATION Struct to point out total size of disc
(CD/DVD) will be easier to use .

thank you.

Ops, in such case, there is now way to know the total size of the disc.
I think it will be better to use only FREE space.
Look at Nero. It uses "Total Capacity" = only recorded size and "Available capacity" = free space.

Bye.