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Reading directory from CD

 
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jum



Joined: 06 Apr 2004
Posts: 38
Location: Cape Town
PostPosted: Wed May 26, 2004 5:15 pm    Post subject: Reading directory from CD Reply with quote
Howdy ppl.

I'm trying to get a directory listing of the CD/CDR, using libcdvd 1.5:

strcpy(pathname, "/");

num_files = CDVD_GetDir(pathname, NULL, CDVD_GET_FILES_AND_DIRS, TocEntryList,4000, pathname);

num_files is set to the correct number of files in the root dir of the CD, however, when I try to get the actual directory entry names using:

for(i=0; i<num_files; i++)
printf("%s\n", TocEntryList[i].filename);

the filename is blank !!!

I've been stuck on this for literally months now, also having tried older versions of libcdvd, and the fioDopen() function.

Any help appreciated.

- jum
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t0mb0la



Joined: 20 Jan 2004
Posts: 24
Location: Seattle WA, USA
PostPosted: Thu May 27, 2004 1:42 pm    Post subject: Reply with quote
Hi Jum,

Do you have TocEntryList aligned to 64 bytes?

i.e:

Code:
   TocEntry TocEntryList[4000] __attribute__((aligned(64)));


or

Code:
 struct TocEntry *TocEntryList = (struct TocEntry *) memalign(64, sizeof(struct TocEntry) * 4000);


Other than that, are you calling CDVD_FlushCache(); before CDVD_GetDir(...); ?

Can't think of any other reasons why it should be misbehaving for you.
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jum



Joined: 06 Apr 2004
Posts: 38
Location: Cape Town
PostPosted: Sat May 29, 2004 6:37 am    Post subject: er... Reply with quote
oops. aligned to 16 bytes:

struct TocEntry tocEntries[MAX_DIR_ENTRIES] __attribute__((aligned(16)));

I'll try align to 64 and use CDVD_FlushCache()

Damn, I probably says to align to 64 in the PDF manual somewhere :/

Tx tombola
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jum



Joined: 06 Apr 2004
Posts: 38
Location: Cape Town
PostPosted: Sat May 29, 2004 8:32 pm    Post subject: still doesn't work Reply with quote
... no luck :(

No mention of aligning 64 in the PDF manual.

Strange thing is that the CDVD_GetDir() returns the correct directory/file count, but the target TocEntry struct data just doesn't get filled.

Reading a file off the CD also works OK.

Perhaps my PS2 dev setup is a bit rotten.
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J.F.



Joined: 22 Feb 2004
Posts: 2906
PostPosted: Sun May 30, 2004 8:29 am    Post subject: Re: Reading directory from CD Reply with quote
jum wrote:

strcpy(pathname, "/");

num_files = CDVD_GetDir(pathname, NULL, CDVD_GET_FILES_AND_DIRS, TocEntryList,4000, pathname);


You might be getting messed up due to the pathname. ps2menu.c uses the call above like this:

Quote:
num_cd_files = CDVD_GetDir(CDpath, NULL, CDVD_GET_FILES_AND_DIRS, (void *)TocEntryList,MAX_ENTRY, NULL);


Note that they pass NULL for new_pathname. Try that with your code and see what happens.
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