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res_rtp_asterisk: Add support for raising additional RTCP messages.

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This change extends the existing AST_FRAME_RTCP frame type to be
able to contain additional RTCP message types, such as feedback
messages. The payload type is contained in the subclass which allows
knowing what is in the frame itself.

The RTCP feedback message type is now handled and REMB[1] messages
are raised with their containing information.

This also fixes a bug where all feedback messages were triggering
video updates instead of just FIR and FUR.

Finally RTCP frames are now passed up through the Asterisk core to
what is handling the channel, mapped appropriately in the case of
bridging, and written to an outgoing stream. Since RTCP frames are
on a per-stream basis this is only done on multistream capable
channels.

[1] https://tools.ietf.org/html/draft-alvestrand-rmcat-remb-03

ASTERISK-27758
ASTERISK-26366

Change-Id: I680da0ad8d5059d5e9655d896fb9d92e9da8491e
This commit is contained in:
Joshua Colp
2018-03-21 13:52:08 +00:00
parent a4a5b8d562
commit e14b0e960d
7 changed files with 104 additions and 15 deletions
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2
channels/chan_pjsip.c
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@@ -965,6 +965,8 @@ static int chan_pjsip_write_stream(struct ast_channel *ast, int stream_num, stru
break;
case AST_FRAME_CNG:
break;
case AST_FRAME_RTCP:
break;
default:
ast_log(LOG_WARNING, "Can't send %u type frames with PJSIP\n", frame->frametype);
break;