[Libcdio-devel] Re: private udf information

[Shaya Potter]

as a followup to my previous information, this function I added to my 
own private copy lets me do what I need

uint32_t udf_get_start_block(const udf_dirent_t *p_udf_dirent)
{
  udf_t *p_udf = p_udf_dirent->p_udf;
  uint32_t i_max_size;
  lba_t i_start = offset_to_lba(p_udf_dirent, p_udf->i_position, &i_start,
                                &i_max_size);
  return i_start;
}

a better solution might be a stat() type call that returns a lot of 
information in a struct.

On 10/17/2010 08:42 PM, Shaya Potter wrote:
> in libcdio a bunch of information is kept private and not readily
> available to programs, what I'm concerned about is basically the
> start/length of a file.
>
> this is in the udf_dirent_t structure, but is hidden from programmers.
>
> I care about this as I am trying to write a barebones dvd decrypter that
> works on images files
>
> i.e. I have some DVDs in bad shape, so using 1) lsdvd to authenticate
> the disk, 2) ddrescue to recover a complete image, but it still has CSS
> embedded, so then need to remove the CSS, but I have to basically check
> if I need to rekey on each VOB file and need to know the start of it to
> rekey on the right block. libcdio's udf support should provide it to me,
> but as it's hidden, it doesn't.
>
> any thoughts on providing an interface to this data?
>
> thanks