Re: [Linphone-developers] rtp_session_recv_with_ts and buffer length

[Simon Morlat]

I wonder if I'm not going to deprecate the recv_with_ts/send_with_ts functions 
in favour of sendm_with_ts/recvm_with_ts.
This interfaces leads too many problem.
Thanks for letting me know about this perl interface. I wouldn't think it was 
possible to do that in perl. This is interesting.
Tell me if you wish a web link from the oRTP homepage to your module.

Simon

Le Jeudi 23 Février 2006 01:56, Nicholas J Humfrey a écrit :
> Yes - I was incrementing by 160 each time. The reason I didn't know
> what size buffer I needed was because I have been writing a perl
> module, which uses oRTP. So I wanted to be able to write:
>
> my $data = $rtp->recv_with_ts( $timestamp );
>
> For the time being I have just added a $bytes parameter to indicate
> the desired number of bytes:
>
> my $data = $rtp->recv_with_ts( $timestamp, $bytes );
>
>
> I have just released the first version of the perl module:
>
> http://search.cpan.org/dist/Net-RTP/
>
> I will continue working on it to implement some of the lower level
> oRTP API too, as I have described in the README file. It will include
> a Net::RTP::Packet package, to receive packets
> rtp_session_recvm_with_ts() style.
>
>
> Using perl to do RTP does indeed seem a little odd - my main
> intention was to use it for testing and debugging. However I have
> written a little perl script called rtpsendbeeps.pl - which I have
> had multicasting beeps to VLC and QuickTime.
>
>
> nick.
>
> On 20 Feb 2006, at 11:58, Simon Morlat wrote:
> > Hi,
> >
> > Are you incrementing the timestamp by 160 each time ?
> > If you want to get the exact buffer for the packet, you can use the
> > rtp_session_recvm_with_ts(). It returns you the rtp packet:
> >
> > while(1){
> >     mblk_t *mp=rtp_session_recvm_with_ts(session, ts);
> >     if (mp!=NULL){
> >             //the rtp header is between mp->b_rptr and mp->b_wptr
> >             //the rtp payload is between mp->b_cont->b_rptr and mp->b_cont-
> >
> > >b_wptr
> >
> >             mblk_t *payload=mp->b_cont;
> >             int len=payload->b_wptr-payload->b_rptr;
> >             output_to_sound_device(payload->b_rptr,len);
> >     }
> >     ts+=160;
> > }
> >
> > Simon
> >
> > Le Jeudi 16 Février 2006 23:25, Nicholas J Humfrey a écrit :
> >> Hi,
> >>
> >> I have been calling rtp_session_recv_with_ts (with scheduling and
> >> blocking mode turned on) with a buffer bigger than I am actually
> >> expecting data for.  eg (passing a 1024 byte buffer, when expecting
> >> 160 PCMU bytes back).
> >>
> >> I was expecting to only get enough data for the timestamp I was
> >> asking for, but instead it seems to be giving me more data than I was
> >> expecting and then later getting confused that it doesn't have enough
> >> data for me and dropping out.
> >>
> >> Is this a bug or a feature?  I was hoping to only have to think about
> >> timestamps and like oRTP work out how much data there is available
> >> for that timestamp....
> >>
> >>
> >> Thanks,
> >>
> >> nick.
> >>
> >>
> >>
> >> _______________________________________________
> >> Linphone-developers mailing list
> >> address@hidden
> >> http://lists.nongnu.org/mailman/listinfo/linphone-developers
>
> _______________________________________________
> Linphone-developers mailing list
> address@hidden
> http://lists.nongnu.org/mailman/listinfo/linphone-developers