Re: [Libcdio-devel] Re: libcdio release roadmap

[Rocky Bernstein]

On Thu, Jan 28, 2010 at 1:13 PM, Thomas Schmitt <address@hidden> wrote:

> Hi,
>
> > The next release seems like it is going to change the API quite a
> > bit with Thomas Schmitt's changes.
>
> But i hope i did not break anything yet.
>
>
> > http://freshmeat.net/projects/libburnia/releases/311319  . This release
> has
> > the ability to use the libcdio code that Thomas put in assist in writing
> and
> > setting/respecting locks on drive access.
>
> To switch to use of libcdio as command transport
>  ./configure --enable-libcdio
>  make clean ; make
>
> Command
>  cdrskin/cdrskin -version
> should then report something like
>  System adapter    :  sg-libcdio h83 with libcdio 0.83git
> x86_64-suse-linux-gnu
>
> This needs an installed libcdio from git which
> is younger than January 17 2010.
>
>
> > Possibly there will be better DVD and Blu Ray
> > support too.
>
> The problems i have seen with DVD and BD are
> in part in my Linux kernel and in part in
> CD-ROM legacy of libcdio.
>
> The kernel is not able to apply certain ioctls
> to BD media.
> libcdio's table-of-content is based on this
> address structure
>  struct msf_s {
>    uint8_t m, s, f; /* BCD encoded! */
>  }
> and thus cannot express more than 100 minutes
> which is about 1 GB of data.
>

All of this is a direct consequence of following the CD standards and not
allowing for
extending them.

One would need new API functions which rely
> on MMC inquiries rather than operating system
> functions. They should allow many sessions,
> tracks, and large block addresses.
>

Right now I am thinking that a separate library might be created for Blu Ray
and/or media that extends but violates older standards.





>
>
> Have a nice day :)
>
> Thomas
>
>
>
>