can audio CDs be played with ATA_CAM ?

[Jeremy Chadwick]

On Tue, Oct 25, 2011 at 01:18:47PM +0200, Claude Buisson wrote:
> On 10/25/2011 12:52, Daniel O'Connor wrote:
> >
> >On 25/10/2011, at 20:45, Claude Buisson wrote:
> >>When upgrading a system to 8.2-STABLE, I switched my kernel from atapicam to
> >>ATA_CAM, and found that vlc could not play audio CDs anymore. Reverting to
> >>atapicam (and reverting from cdN to acdN of course), vlc was OK again.
> >>
> >>It seems that I am not the only one having this kind of problem, as I found (for
> >>example) this message on questions@ (for releng9):
> >>
> >>http://lists.freebsd.org/pipermail/freebsd-questions/2011-October/234737.html
> >>
> >>Is this a known problem ? Is somebody working on it ?
> >
> >Have you tried pointing VLC at /dev/cd0 when using ATA_CAM?
> >
> 
> Of course yes ! (I even configured WITH_CDROM_DEVICE=/dev/cd1 when building VLC)
> 
> 
> >It may be trying old style ATA ioctls based on the device name.
> >
> 
> VLC recognize the tracks and jump quickly from one to the following, without
> playing it, and with a flow of messages:
> 
> [0x2caf2a3c] cdda access error: Could not set block size
> [0x2caf2a3c] cdda access error: cannot read sector nnnnn
> 
> where the sector number is incremented, and then emit (2 times if I remenber):
> 
> [0x2af28bc] es demux error: cannot peek
> 
> Sorry for having ommited these messages in the previous mail.
> 
> I found a PR 161760 about cdparanoia needing to be patched for 9.0 with CAM, a
> proposal by avg@ related to libxine:
> 
> http://lists.freebsd.org/pipermail/freebsd-multimedia/2010-December/011414.html
> 
> These may not be the same problem, but I think they are related (a not so well
> documented change in the kerm interface).

You want atapicam(4).  This is not the same thing as "options ATA_CAM".
See /sys/conf/NOTES.

Whether or not it works with audio CDs is unknown to me.

-- 
| Jeremy Chadwick                                jdc at parodius.com |
| Parodius Networking                       http://www.parodius.com/ |
| UNIX Systems Administrator                   Mountain View, CA, US |
| Making life hard for others since 1977.               PGP 4BD6C0CB |