Need Help Regarding SRTPDEC request_key_callback
sameer
sameer.thapa at evontech.com
Wed Apr 8 15:33:02 UTC 2020
On returning caps instead of *caps the app is crashing without showing
any errorlogs.
Do I need to add the callback method in the class as a member method?
On 08/04/20 7:20 pm, Lefteris Diakakis wrote:
>
> *From:*Olivier Crête <olivier.crete at collabora.com>
> *Sent:* Wednesday, April 8, 2020 4:47 PM
> *To:* Discussion of the development of and with GStreamer
> <gstreamer-devel at lists.freedesktop.org>
> *Cc:* Lefteris Diakakis <ldiakakis at rtelworld.com>
> *Subject:* Re: Need Help Regarding SRTPDEC request_key_callback
>
> Hi,
>
> On Wed, 2020-04-08 at 18:52 +0530, sameer wrote:
>
> Thank you for the quick reply!
>
> We have not unref the srtpdec object anywhere. Even made the
> srtpdec object global.
>
> Following is our implementation of callback:
>
> g_signal_connect(G_OBJECT(srtpdec), "request-key", G_CALLBACK
> (request_key_callback), &masterKey);
>
> // masterKey is string
>
> // srtpdec is global GstElement
>
> GstCaps request_key_callback (GstElement gstsrtpdec, guint ssrc,
> gpointer udata)
>
> The return value should be a "GstCaps *"
>
> {
> string *key = (string*)udata;
> GstCaps *caps = gst_caps_new_simple ("application/x-srtp",
> "payload", G_TYPE_INT, 0,
> "ssrc", G_TYPE_UINT, ssrc,
> "srtp-key", G_TYPE_STRING, key->c_str(),
> "srtp-auth", G_TYPE_STRING, "hmac-sha1-80",
> "srtp-cipher", G_TYPE_STRING, "aes-128-icm",
> "srtcp-auth", G_TYPE_STRING, "hmac-sha1-80",
> "srtcp-cipher", G_TYPE_STRING, "aes-128-icm",
> "roc", G_TYPE_UINT, 0,
> NULL);
> return *caps;
> }
>
> And you should "return caps;"
>
> Olivier
>
> Is it the correct way?
>
> Thanks
>
> *From:*Olivier Crête <olivier.crete at collabora.com>
> <mailto:olivier.crete at collabora.com>
> *Sent:* Wednesday, April 8, 2020 3:52 PM
> *To:* Discussion of the development of and with GStreamer
> <gstreamer-devel at lists.freedesktop.org>
> <mailto:gstreamer-devel at lists.freedesktop.org>
> *Cc:* Lefteris Diakakis <ldiakakis at rtelworld.com>
> <mailto:ldiakakis at rtelworld.com>
> *Subject:* Re: Need Help Regarding SRTPDEC request_key_callback
>
> Hi,
>
> On Wed, 2020-04-08 at 14:37 +0530, sameer wrote:
>
> The ssrc is not received in sdp. I have implemented the
> callback function to return capstring as mentioned in the
> documentation
> <https://gstreamer.freedesktop.org/data/doc/gstreamer/head/gst-plugins-bad/html/gst-plugins-bad-plugins-srtpdec.html>
> :
>
> *static GstCaps request_key_callback (GstElement
> gstsrtpdec, guint ssrc, gpointer udata) *
>
> The capstring returned is like:
>
> *"
> 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
> "*
>
> But after the callback invokes I am receiving following error:
>
> *(recorder:32537): GLib-GObject-CRITICAL **: 14:18:06.064:
> g_object_unref: assertion 'G_IS_OBJECT (object)' failed
>
> ** (recorder:32537): CRITICAL **: 14:18:06.064:
> update_session_stream_from_caps: assertion
> 'GST_IS_SRTP_DEC (filter)' failed*
>
> and the app crashes.
>
> Can anyone tell me what mistake I am making. I am not able
> to find much in the documentation or any examples.
>
> You probably unref the srtpdec object somewhere where you
> shouldn't.
>
> --
>
> Olivier Crête
>
> <mailto:olivier.crete at collabora.com>
>
> _olivier.crete at collabora.com<mailto:olivier.crete at collabora.com>_
>
> _______________________________________________
>
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>
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>
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>
> --
> Olivier Crête
> olivier.crete at collabora.com <mailto:olivier.crete at collabora.com>
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