rohc

Define RTP port

Asked by BADEUIL

Hello,

I would like to define RTP ports. The function rohc_comp_add_rtp_port is exactly what I need but is obsolete.

The Doxygen Help file is suggesting me to use rohc_comp_set_rtp_detection_cb() function but I understand nothing about how to configure and use it.

Can you help me ?

I have a list of RTP port defined in a file and I would like to add these to the compressor.

Regards.

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Didier Barvaux (didier-barvaux) said : 		#1

Hello,

Indeed, the rohc_comp_add_rtp_port() function is deprecated because the RTP detection callback can provide the same feature in a more generic way.

For the RTP detection callback, look at the examples/rtp_detection.c example. That program compresses one IPv4/UDP/RTP packet and detects RTP streams with one RTP callback function set with the rohc_comp_set_rtp_detection_cb() function.

The call to rohc_comp_set_rtp_detection_cb() is performed at line 277. The rtp_detect() function is defined at line 364. The rtp_detect() function extracts the UDP destination port and decides that the packet belongs to a RTP stream only if its destination port equals 10042.

This an example. It should help you using the RTP detection callback instead of the deprecated rohc_comp_add_rtp_port() function. Let me know if it helped you.

Regards,
Didier

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