Re: [VCDImager Bugs/Devel] vcdimager on BSD/OS 4.3

[Herbert Valerio Riedel]

On Wed, 29 Aug 2001, Steven M. Schultz wrote:

> Hello -
>
>       Recently I downloaded vcdimager-0.7.9 and ported it to BSD/OS 4.3
>       (well, technically 4.3beta3 ;)).  Surprisingly few changes were
>       required,  3 .c files and 3 Makefile.am files and the changes are
>       minimal.

btw, is __bsdi__ defined on every *BSD flavour?

>       Most of the changes to .c files simply augment the "defined(__linux__)"
>       with "defined(__bsdi__)" so that CD/DVD devices can be used with
>       the "--cdrom-device" option.

I've added some lowlevel generic packet cdrom interface calls to the
linuxcd image source driver... so bsd will get it's own cdrom image source
driver; it won't need the libdvd wrapper...

>       There is however one change to a .c file that deserves special mention.
>       Using 'fseek' and 'fread' to access the ISO portion of a VCD can cause
>       "illegal command for track" errors with some devices.  This is because
>       the 'raw' (/dev/rsr0c in BSD speak) device is used and the stdio
>       library functions assign an arbitrarily large (64KB) buffer to do I/O
>       with.   Issuing a 64KB read instead of a 2KB read causes problems with
>       some devices.  Since 'ioctl' is used to actually read the sectors later
>       it seems to be a good idea to use 'lseek' and 'read' instead of stdio
>       routines to access the ISO area.
actually in the next version all sectors will be read by ioctl()'s...

>       The Makefile.am changes are a _hack_, the way I did them is known not
>       to be correct but I did not know how best to include additional
>       libraries on an OS dependant basis.   I needed to link programs against
>       "-ldvd" which is a linux DVD/VCD/CD ioctl emulation library described
>       below.
a no-problem, since libdvd won't be necessary...

>       I have a "libdvd" package (attached below) which emulated the Linux
>       DVD/VCD ioctl calls.  The VideoLanClient ('vlc' from www.videolan.org)
>       project has incorporated this into their 0.2.83 release so I know it
>       works for at least one other program than vcdimager (and xine) ;)
:-)

>       At any rate with the changes below I've successfully rip'd and created
>       a VCD with vcdimager-0.7.9 under BSD/OS 4.3 so I'm submitting the
>       changes for your consideration.
btw, the libdvd seems like a rip-off of the linux kernel's cdrom.c...

>       I see that 0.7.10 was just announced as I typed this - oh well ;)
...you can't stop development from happening from time to time... *g*

-- 
Herbert Valerio Riedel       /    Phone: (EUROPE) +43-1-58801-18840
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