reading files from CD

PrimeTime · Post by **PrimeTime** » Sat Sep 04, 2004 3:31 pm

Hello, its me again

I can sucessfully read files from a hard drive, and now i'm working on reading files from the CD drive.

I'm running into a few problems. First, is it possible to use the fileXio library with the cd drive?

Second, I'm trying the following code.

Code: Select all

   cdSync&#40;0&#41;;
   fioOpen&#40;"cdrom0&#58;/Test/Test file.txt;1", O_RDONLY&#41;;

the open function is returning -1 however. Although I checked the CD and the file is there.

Is there something I'm missing here?

Thanks,
Ryan

Post by **Drakonite** » Sat Sep 04, 2004 4:13 pm

Yeah, fileXio works fine for cds.

Unless I'm mistaken cdrom0 only supports iso level 1 filenames. In other words, the filenames are restricted to 8.3 characters. I _THINK_ the 8.3 filename for "cdrom0:/Test/Test file.txt;1" would end up as "cdrom0:/TEST/TESTFI~1.TXT;1" but don't quote me on that.

Post by **pixel** » Sat Sep 04, 2004 7:48 pm

Well, it depends on the driver which is giving the "cdrom0" filesystem. But I second Drak here: you shouldn't use joliet filesystem.

On a side note:

you may want to

Code: Select all

    cdInit&#40;CDVD_INIT_INIT&#41;;
    cdSetMediaMode&#40;CDVD_MEDIA_MODE_CD&#41;;

Post by **Drakonite** » Sun Sep 05, 2004 4:05 am

pixel wrote:Well, it depends on the driver which is giving the "cdrom0" filesystem. But I second Drak here: you shouldn't use joliet filesystem.

Uh... There isn't a lot of choices here ;) And the only way I know of to get support for more than just ISO level 1 doesn't use "cdrom0" as the device name. If there is a third I don't know about, then please by all means let me know.

PrimeTime · Post by **PrimeTime** » Sun Sep 05, 2004 6:02 am

Okay, cool.

I'm using fileXio for reading from the hard drive, I just wanted to be able to use both drives without having to change the code as much.

If I want to use the fileXioOpen, Read, Dread, etc... is there any special initialization that I must do? Which device name should I use rather than "cdrom0"?

Thanks,
Ryan

PrimeTime · Post by **PrimeTime** » Sat Sep 11, 2004 3:58 pm

Hi,

I found out that my problem was that I didn't have the LIBCDVD v1.15
library. So now that I got that, I am able to read files from the cd using
fioOpen and fioRead. However, I still cannot use fileXioOpen and fileXioRead, these functions return < 0. Does anyone have any suggestions?

Code: Select all

   static int fMode =  FIO_S_IRUSR | FIO_S_IWUSR | FIO_S_IXUSR | FIO_S_IRGRP | FIO_S_IWGRP | FIO_S_IXGRP | FIO_S_IROTH | FIO_S_IWOTH | FIO_S_IXOTH;

   CDVD_Init&#40;&#41;;
   CDVD_FlushCache&#40;&#41;;
   int a;
   unsigned char buf&#91;2200+1&#93;;
   a = fileXioOpen&#40;"cdfs&#58;/APPS/PGEN/PGEN.TXT", O_RDONLY, fMode&#41;;
   printf&#40;"opening file returned %d\n", a&#41;;
   fileXioRead&#40;a, buf, 2200&#41;;
   printf&#40;"read&#58; %s\n", buf&#41;;

If i replace the Xio with fio, then everything works.

Post by **TyRaNiD** » Sat Sep 11, 2004 5:55 pm

Well fileXio and fileio do not always share file drivers, I recall libcdvd uses fileio so you must access it via the fio functions. There was supposedly some hack to filexio to hook the original file handler but I guess it doesn't work.