Gstrtpbin - one RtpSession, several "on-new-ssrc" calls

[Matthias Dodt]

Hey guys!

Is there an implementation to access the specific sdes-GstStructure for
each ssrc announced by the "on-new-ssrc" signal?

The on-new-ssrc function has only the id of ssrc passed (guint ssrc) -
but i need the RTCP-sdes message of the corresponding ssrc to extract
CNAME and NAME of that ssrc.

The doc states on-new-ssrc as follows:

void                user_function                      (GstRtpSession
*sess,
                                                        guint
ssrc,
                                                        gpointer
user_data)

And what does user_data contain?

Thanks!

mat
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[Marco Ballesio]

Hi,

On 9/15/11, Matthias Dodt <[hidden email]> wrote:
> Hey guys!
>
> Is there an implementation to access the specific sdes-GstStructure for
> each ssrc announced by the "on-new-ssrc" signal?

what about the "sdes" property in gstrtpbin?

>
> The on-new-ssrc function has only the id of ssrc passed (guint ssrc) -
> but i need the RTCP-sdes message of the corresponding ssrc to extract
> CNAME and NAME of that ssrc.
>
> The doc states on-new-ssrc as follows:
>
> void                user_function                      (GstRtpSession
> *sess,
>                                                         guint
> ssrc,
>                                                         gpointer
> user_data)
>
> And what does user_data contain?

as "user_function" is a callback, user_data is a pointer to whatever
extra data you might want to access there.

Regards

>
> Thanks!
>
> mat
> _______________________________________________
> gstreamer-devel mailing list
> [hidden email]
> http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel
>
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[Olivier Crête-3]

On Sat, 2011-09-17 at 09:48 +0200, Marco Ballesio wrote:
> Hi,
>
> On 9/15/11, Matthias Dodt <[hidden email]> wrote:
> > Hey guys!
> >
> > Is there an implementation to access the specific sdes-GstStructure for
> > each ssrc announced by the "on-new-ssrc" signal?
>
> what about the "sdes" property in gstrtpbin?

That's the one you send, the ones you receive are sent to you in the
"application/x-rtp-source-sdes" GstMessage of type GST_MESSAGE_ELEMENT.

The other option is to use the "get-internal-session" action signal on
gstrtpbin to extract the rtpsession and the use the "get-source-by-ssrc"
action signal on the session to get the rtpsource.. And on the
rtpsource, there is a property called "sdes" that contains the content
of the SDES.


--
Olivier Crête
[hidden email]

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[Matthias Dodt]

Hi Oliver!

Thanks for your reply. I like the second option more (I was already using the first one) because the GstMessages might be processed with some delay and since I only get the GstStructure I cant tell to which session it belongs- (or at least I don't know how to):

...
case GST_MESSAGE_ELEMENT:{
                                if (gst_structure_has_name (msg->structure, "application/x-rtp-source-sdes")){
                                        const gchar* name=0;
                                        const gchar* cname=0;
                                        name = gst_structure_get_string(msg->structure,"name");
                                        cname = gst_structure_get_string(msg->structure,"cname");
...

(This works fine, but I don't know which session this message belongs to).

Now that I use the "on-new-sdes" callback I should be able to do that:

on_ssrc_sdes(GstElement *gstrtpbin,guint sessionid,guint ssrc,gpointer data)
{
        GObject *rtpsession, *rtpsource;
        GstStructure *sessionInfo;
        ...
        g_signal_emit_by_name(rtpbin, "get-internal-session", sessionid,&rtpsession);
        g_signal_emit_by_name(rtpsession, "get-source-by-ssrc", ssrc,&rtpsource);
        g_object_get(rtpsource, "stats", &sessionInfo, NULL);
        const gchar* name=gst_structure_get_name (sessionInfo);
        const gchar* client=gst_structure_get_string(sessionInfo,"cname");
...

The only problem is that this "GstStructure" does not contain any "cname", while the message send on the GstBus has. But instead it contains a bunch of other information...:

gst_structure_to_string(sessionInfo); - Output:

application/x-rtp-source-stats, ssrc=(uint)1096463363, internal=(boolean)false, validated=(boolean)true, received-bye=(boolean)false, is-csrc=(boolean)false, is-sender=(boolean)true, seqnum-base=(int)-1, clock-rate=(int)44100, rtp-from=(string)192.168.115.34:65201, rtcp-from=(string)192.168.115.34:65202, octets-received=(guint64)247808, packets-received=(guint64)242, bitrate=(guint64)586604, packets-lost=(int)0, jitter=(uint)3161, have-sr=(boolean)true, sr-ntptime=(guint64)15141624471614630320, sr-rtptime=(uint)3060205931, sr-octet-count=(uint)239616, sr-packet-count=(uint)234, have-rb=(boolean)false, rb-fractionlost=(uint)0, rb-packetslost=(int)0, rb-exthighestseq=(uint)0, rb-jitter=(uint)0, rb-lsr=(uint)0, rb-dlsr=(uint)0, rb-round-trip=(uint)0;

But there's no cname. Why is that?

Thanks

mat

-----Ursprüngliche Nachricht-----
Von: gstreamer-devel-bounces+mdodt=[hidden email] [mailto:gstreamer-devel-bounces+mdodt=[hidden email]] Im Auftrag von Olivier Crête
Gesendet: 17 September 2011 19:15
An: [hidden email]
Betreff: Re: Gstrtpbin - one RtpSession, several "on-new-ssrc" calls

On Sat, 2011-09-17 at 09:48 +0200, Marco Ballesio wrote:
> Hi,
>
> On 9/15/11, Matthias Dodt <[hidden email]> wrote:
> > Hey guys!
> >
> > Is there an implementation to access the specific sdes-GstStructure
> > for each ssrc announced by the "on-new-ssrc" signal?
>
> what about the "sdes" property in gstrtpbin?

That's the one you send, the ones you receive are sent to you in the "application/x-rtp-source-sdes" GstMessage of type GST_MESSAGE_ELEMENT.

The other option is to use the "get-internal-session" action signal on gstrtpbin to extract the rtpsession and the use the "get-source-by-ssrc"
action signal on the session to get the rtpsource.. And on the rtpsource, there is a property called "sdes" that contains the content of the SDES.


--
Olivier Crête
[hidden email]
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[Matthias Dodt]

Hi Marco!

Thanks for your reply too. The "sdes" property only outputs the sdes of the sdes beeing send to other participants, but not the one beeing received.

I understand that user_data should be any data I want to use, but since the signal get's emitted by the GstBus I see no way how this pointer can be used (except for the cases where I emit the signal myself)-

Best,

mat

-----Ursprüngliche Nachricht-----
Von: gstreamer-devel-bounces+mdodt=[hidden email] [mailto:gstreamer-devel-bounces+mdodt=[hidden email]] Im Auftrag von Marco Ballesio
Gesendet: 17 September 2011 09:48
An: Discussion of the development of and with GStreamer
Betreff: Re: Gstrtpbin - one RtpSession, several "on-new-ssrc" calls

Hi,

On 9/15/11, Matthias Dodt <[hidden email]> wrote:
> Hey guys!
>
> Is there an implementation to access the specific sdes-GstStructure
> for each ssrc announced by the "on-new-ssrc" signal?

what about the "sdes" property in gstrtpbin?

>
> The on-new-ssrc function has only the id of ssrc passed (guint ssrc) -
> but i need the RTCP-sdes message of the corresponding ssrc to extract
> CNAME and NAME of that ssrc.
>
> The doc states on-new-ssrc as follows:
>
> void                user_function                      (GstRtpSession
> *sess,
>                                                         guint ssrc,
>                                                         gpointer
> user_data)
>
> And what does user_data contain?

as "user_function" is a callback, user_data is a pointer to whatever extra data you might want to access there.

Regards

>
> Thanks!
>
> mat
> _______________________________________________
> gstreamer-devel mailing list
> [hidden email]
> http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel
>
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[Marco Ballesio]

Hi,

On Mon, Sep 19, 2011 at 5:36 PM, Matthias Dodt <[hidden email]> wrote:
> Hi Marco!
>
> Thanks for your reply too. The "sdes" property only outputs the sdes of the sdes beeing send to other participants, but not the one beeing received.

Right. My fault I didn't check deeper when reading the documentation
(instead of the sources ;) ).

>
> I understand that user_data should be any data I want to use, but since the signal get's emitted by the GstBus I see no way how this pointer can be used (except for the cases where I emit the signal myself)-

It is the pointer you set as user_data in:

http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstBus.html#gst-bus-add-watch

Regards

>
> Best,
>
> mat
>
> -----Ursprüngliche Nachricht-----
> Von: gstreamer-devel-bounces+mdodt=[hidden email] [mailto:gstreamer-devel-bounces+mdodt=[hidden email]] Im Auftrag von Marco Ballesio
> Gesendet: 17 September 2011 09:48
> An: Discussion of the development of and with GStreamer
> Betreff: Re: Gstrtpbin - one RtpSession, several "on-new-ssrc" calls
>
> Hi,
>
> On 9/15/11, Matthias Dodt <[hidden email]> wrote:
>> Hey guys!
>>
>> Is there an implementation to access the specific sdes-GstStructure
>> for each ssrc announced by the "on-new-ssrc" signal?
>
> what about the "sdes" property in gstrtpbin?
>
>>
>> The on-new-ssrc function has only the id of ssrc passed (guint ssrc) -
>> but i need the RTCP-sdes message of the corresponding ssrc to extract
>> CNAME and NAME of that ssrc.
>>
>> The doc states on-new-ssrc as follows:
>>
>> void                user_function                      (GstRtpSession
>> *sess,
>>                                                         guint ssrc,
>>                                                         gpointer
>> user_data)
>>
>> And what does user_data contain?
>
> as "user_function" is a callback, user_data is a pointer to whatever extra data you might want to access there.
>
> Regards
>
>>
>> Thanks!
>>
>> mat
>> _______________________________________________
>> gstreamer-devel mailing list
>> [hidden email]
>> http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel
>>
> _______________________________________________
> gstreamer-devel mailing list
> [hidden email]
> http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel
>
>
>
> _______________________________________________
> gstreamer-devel mailing list
> [hidden email]
> http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel
>

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[Matthias Dodt]

Hi Marco!

Ahh yes - that makes perfect sense then. Thanks a lot!

Cheers,

mat

-----Ursprüngliche Nachricht-----
Von: gstreamer-devel-bounces+mdodt=[hidden email] [mailto:gstreamer-devel-bounces+mdodt=[hidden email]] Im Auftrag von Marco Ballesio
Gesendet: 20 September 2011 05:50
An: Discussion of the development of and with GStreamer
Betreff: Re: Gstrtpbin - one RtpSession, several "on-new-ssrc" calls

Hi,

On Mon, Sep 19, 2011 at 5:36 PM, Matthias Dodt <[hidden email]> wrote:
> Hi Marco!
>
> Thanks for your reply too. The "sdes" property only outputs the sdes of the sdes beeing send to other participants, but not the one beeing received.

Right. My fault I didn't check deeper when reading the documentation (instead of the sources ;) ).

>
> I understand that user_data should be any data I want to use, but
> since the signal get's emitted by the GstBus I see no way how this
> pointer can be used (except for the cases where I emit the signal
> myself)-

It is the pointer you set as user_data in:

http://gstreamer.freedesktop.org/data/doc/gstreamer/head/gstreamer/html/GstBus.html#gst-bus-add-watch

Regards

>
> Best,
>
> mat
>
> -----Ursprüngliche Nachricht-----
> Von:
> gstreamer-devel-bounces+mdodt=[hidden email]
> [mailto:gstreamer-devel-bounces+mdodt=[hidden email]
> op.org] Im Auftrag von Marco Ballesio
> Gesendet: 17 September 2011 09:48
> An: Discussion of the development of and with GStreamer
> Betreff: Re: Gstrtpbin - one RtpSession, several "on-new-ssrc" calls
>
> Hi,
>
> On 9/15/11, Matthias Dodt <[hidden email]> wrote:
>> Hey guys!
>>
>> Is there an implementation to access the specific sdes-GstStructure
>> for each ssrc announced by the "on-new-ssrc" signal?
>
> what about the "sdes" property in gstrtpbin?
>
>>
>> The on-new-ssrc function has only the id of ssrc passed (guint ssrc)
>> - but i need the RTCP-sdes message of the corresponding ssrc to
>> extract CNAME and NAME of that ssrc.
>>
>> The doc states on-new-ssrc as follows:
>>
>> void                user_function                      (GstRtpSession
>> *sess,
>>                                                         guint ssrc,
>>                                                         gpointer
>> user_data)
>>
>> And what does user_data contain?
>
> as "user_function" is a callback, user_data is a pointer to whatever extra data you might want to access there.
>
> Regards
>
>>
>> Thanks!
>>
>> mat
>> _______________________________________________
>> gstreamer-devel mailing list
>> [hidden email]
>> http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel
>>
> _______________________________________________
> gstreamer-devel mailing list
> [hidden email]
> http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel
>
>
>
> _______________________________________________
> gstreamer-devel mailing list
> [hidden email]
> http://lists.freedesktop.org/mailman/listinfo/gstreamer-devel
>

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