res_rtp_asterisk.c: Set Mark on rtp when timestamp skew is too big

Set Mark bit in rtp stream when timestamp skew is bigger than MAX_TIMESTAMP_SKEW.

Fixes: #927
(cherry picked from commit 8cad9f2420da0d5edc0effe0ccd32fd6b133b0dc)

diff --git a/res/res_rtp_asterisk.c b/res/res_rtp_asterisk.c
index 1953e15e2942259fe439ffe1b0ea71cdfe19ec23..60e931c71bf032868f9b05e5f96bdc6d14b2ec9b 100644 (file)
--- a/res/res_rtp_asterisk.c
+++ b/res/res_rtp_asterisk.c
@@ -5267,6 +5267,11 @@ static int rtp_raw_write(struct ast_rtp_instance *instance, struct ast_frame *fr
        }
 
        if (ast_test_flag(frame, AST_FRFLAG_HAS_TIMING_INFO)) {
+               if (abs(frame->ts * rate - (int)rtp->lastts) > MAX_TIMESTAMP_SKEW) {
+                       ast_verbose("(%p) RTP audio difference is %d set mark\n",
+                               instance, abs(frame->ts * rate - (int)rtp->lastts));
+                       mark = 1;
+               }
                rtp->lastts = frame->ts * rate;
        }