Re: GStreamer gnome-vfs question

[Alexander Larsson <alexl redhat com>]

On 27 Apr 2003, Christian Fredrik Kalager Schaller wrote:

> On Wed, 2003-04-23 at 09:45, Alexander Larsson wrote:
> > On 22 Apr 2003, Christian Fredrik Kalager Schaller wrote:
> > 
> > > Hi,
> > > We have a bug in GStreamer bugzilla:
> > > http://bugzilla.gnome.org/show_bug.cgi?id=104840
> > > 
> > > Which contain the following for a while now:
> > > [ It would be great if the gnomevfssrc plugin could have some way of
> > >   discovering whether the currently opened stream is seekable.
> > > 
> > > ------- Additional Comments From Wim Taymans 2003-04-04 14:41 -------
> > > 
> > > Any ideas how the gnomevfs API exposes the seekable property, I can't
> > > find a method. Opening the file with OPEN_RANDOM causes gnomevfs to
> > > open the stream without an error but then it continues to read random
> > > memory...
> > >  ]
> > > 
> > > If any of you guys know the answer to this we would really appreciate it if 
> > > you could add a comment on the bug so we could resolve the issue on our side.
> > > 
> > > Thanks in advance,
> > > Christian
> > 
> > Hmmm. This sounds strange. gnome_vfs_seek() should return 
> > GNOME_VFS_ERROR_NOT_SUPPORTED if you seek on a handle where its not 
> > supported. For local file-uris I don't see how it can read random memory, 
> > gnome_vfs_seek() just calls lseek().
> > 
> > However, there is no "seekable" property you can read. Is there even a 
> > posix API we could use to implement this?
> ------- Additional Comments From Wim Taymans 2003-04-26 10:28 -------
> 
> lseek returns -1 when an error occured, you can check errno to find
> out that it was a pipe/socket or fifo (ESPIPE) you were seeking on; I
> would suggest to return _NOT_SUPPORTED in that case.

Yes, we do that. 
I commented in the bug.

-- 
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 Alexander Larsson                                            Red Hat, Inc 
                   alexl redhat com    alla lysator liu se 
He's an ungodly overambitious filmmaker gone bad. She's a tortured 
African-American single mother with an evil twin sister. They fight crime!