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<body style="text-align:left; direction:ltr;"><div>Hi,</div><div><br></div><div>On Wed, 2020-04-08 at 18:52 +0530, sameer wrote:</div><blockquote type="cite" style="margin:0 0 0 .8ex; border-left:2px #729fcf solid;padding-left:1ex">
<p>Thank you for the quick reply!</p>
<p>We have not unref the srtpdec object anywhere. Even made the
srtpdec object global.</p>
<div class="moz-cite-prefix">
<p>Following is our implementation of callback:<br>
</p>
<p>g_signal_connect(G_OBJECT(srtpdec), "request-key", G_CALLBACK
(request_key_callback), &masterKey);</p>
<p>// masterKey is string</p>
<p>// srtpdec is global GstElement<br>
</p>
<p>GstCaps request_key_callback (GstElement gstsrtpdec, guint
ssrc, gpointer udata) <br></p></div></blockquote><div>The return value should be a "GstCaps *"</div><div><br></div><blockquote type="cite" style="margin:0 0 0 .8ex; border-left:2px #729fcf solid;padding-left:1ex"><div class="moz-cite-prefix"><p>
</p>
<p>{ <br>
string *key = (string*)udata;<br>
GstCaps *caps = gst_caps_new_simple ("application/x-srtp",<br>
"payload", G_TYPE_INT, 0,<br>
"ssrc", G_TYPE_UINT, ssrc,<br>
"srtp-key", G_TYPE_STRING, key->c_str(),<br>
"srtp-auth", G_TYPE_STRING, "hmac-sha1-80",<br>
"srtp-cipher", G_TYPE_STRING, "aes-128-icm",<br>
"srtcp-auth", G_TYPE_STRING, "hmac-sha1-80",<br>
"srtcp-cipher", G_TYPE_STRING, "aes-128-icm",<br>
"roc", G_TYPE_UINT, 0,<br>
NULL);<br>
return *caps;<br>
}</p></div></blockquote><div>And you should "return caps;"</div><div><br></div><div>Olivier</div><div><br></div><blockquote type="cite" style="margin:0 0 0 .8ex; border-left:2px #729fcf solid;padding-left:1ex"><div class="moz-cite-prefix">
<p>Is it the correct way?</p>
<p>Thanks</p>
</div>
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<p class="MsoNormal"><b><span lang="EL">From:</span></b><span lang="EL"> Olivier Crête
<a class="moz-txt-link-rfc2396E" href="mailto:olivier.crete@collabora.com"><olivier.crete@collabora.com></a>
<br>
<b>Sent:</b> Wednesday, April 8, 2020 3:52 PM<br>
<b>To:</b> Discussion of the development of and with
GStreamer <a class="moz-txt-link-rfc2396E" href="mailto:gstreamer-devel@lists.freedesktop.org"><gstreamer-devel@lists.freedesktop.org></a><br>
<b>Cc:</b> Lefteris Diakakis
<a class="moz-txt-link-rfc2396E" href="mailto:ldiakakis@rtelworld.com"><ldiakakis@rtelworld.com></a><br>
<b>Subject:</b> Re: Need Help Regarding SRTPDEC
request_key_callback<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<div>
<p class="MsoNormal">Hi,<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal">On Wed, 2020-04-08 at 14:37 +0530, sameer
wrote:<o:p></o:p></p>
</div>
<blockquote type="cite" style="margin:0 0 0 .8ex; border-left:2px #729fcf solid;padding-left:1ex">
<p>The ssrc is not received in sdp. I have implemented the
callback function to return capstring as mentioned in the
<a href="https://gstreamer.freedesktop.org/data/doc/gstreamer/head/gst-plugins-bad/html/gst-plugins-bad-plugins-srtpdec.html" moz-do-not-send="true">
documentation</a> :<o:p></o:p></p>
<p><b>static GstCaps request_key_callback (GstElement
gstsrtpdec, guint ssrc, gpointer udata)
</b><o:p></o:p></p>
<p>The capstring returned is like:<o:p></o:p></p>
<p><b>"
application/x-srtp,channels=(int)1,media=(string)audio,payload=(int)0,clock-rate=(int)8000,encoding-name=(string)PCMU,ssrc=(uint)1932929554,srtp-key=(buffer)4d73554e564e334354466141365042324168614444436c4a456a754a497673747a354e5961694d5a,srtp-cipher=(string)aes-128-icm,srtp-auth=(string)hmac-sha1-32,srtcp-cipher=(string)aes-128-icm,srtcp-auth=(string)hmac-sha1-32,roc=(uint)0
"</b><o:p></o:p></p>
<p>But after the callback invokes I am receiving following
error:<o:p></o:p></p>
<p><b>(recorder:32537): GLib-GObject-CRITICAL **:
14:18:06.064: g_object_unref: assertion 'G_IS_OBJECT
(object)' failed<br>
<br>
** (recorder:32537): CRITICAL **: 14:18:06.064:
update_session_stream_from_caps: assertion
'GST_IS_SRTP_DEC (filter)' failed</b><o:p></o:p></p>
<p>and the app crashes.<o:p></o:p></p>
<p>Can anyone tell me what mistake I am making. I am not able
to find much in the documentation or any examples.<o:p></o:p></p>
</blockquote>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<p class="MsoNormal">You probably unref the srtpdec object
somewhere where you shouldn't.<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><o:p> </o:p></p>
</div>
<div>
<pre>-- </pre><o:p></o:p>
<pre>Olivier Crête</pre><o:p></o:p>
<a href="mailto:olivier.crete@collabora.com" moz-do-not-send="true"><pre>olivier.crete@collabora.com</pre></a><o:p></o:p>
</div>
</div>
</blockquote>
<pre>_______________________________________________</pre><pre>gstreamer-devel mailing list</pre><a href="mailto:gstreamer-devel@lists.freedesktop.org"><pre>gstreamer-devel@lists.freedesktop.org</pre></a><pre><br></pre><a href="https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel"><pre>https://lists.freedesktop.org/mailman/listinfo/gstreamer-devel</pre></a><pre><br></pre></blockquote><div><span><pre><pre>-- <br></pre>Olivier Crête
olivier.crete@collabora.com
</pre></span></div></body></html>