MT#55283 fix DTMF end event sequencing

Make sure we increase the output RTP sequence
number for each generated packet in the case
of packets that need to be duplicated or sent
repeatedly (DTMF end event)

Change-Id: Ia16ffefc0791d01575248ac5d8025eb30ccaec67
(cherry picked from commit 41a9894cce)

daemon/codec.c

@@ -2289,10 +2289,12 @@ static int packet_dtmf(struct codec_ssrc_handler *ch, struct codec_ssrc_handler
 					ret = 1; // consumed
 				else
 					ret = packet_dtmf_fwd(ch, input_ch, dup, mp);
+				mp->ssrc_out->parent->seq_diff++;
 
 				if (ret == 0)
 					__transcode_packet_free(dup);
 			}
+			mp->ssrc_out->parent->seq_diff--;
 
 			// discard the received event
 			do_blocking = true;

t/auto-daemon-tests.pl

@@ -1806,12 +1806,12 @@ snd($sock_a, $port_b, rtp(101, 1028, 6040, 0x1234, "\x03\xa6\x03\xc0"));
 rcv_no($sock_b);
 # send audio, receive end event
 snd($sock_a, $port_b, rtp(8, 1029, 7000, 0x1234, "\x00" x 160));
+rcv($sock_b, $port_a, rtpm(101, 1029, 6200, 0x1234, "\x01\x8c\x03\xc0"));
+rcv($sock_b, $port_a, rtpm(101, 1030, 6200, 0x1234, "\x01\x8c\x03\xc0"));
 rcv($sock_b, $port_a, rtpm(101, 1031, 6200, 0x1234, "\x01\x8c\x03\xc0"));
-rcv($sock_b, $port_a, rtpm(101, 1032, 6200, 0x1234, "\x01\x8c\x03\xc0"));
-rcv($sock_b, $port_a, rtpm(101, 1033, 6200, 0x1234, "\x01\x8c\x03\xc0"));
 
 snd($sock_a, $port_b, rtp(8, 1030, 7160, 0x1234, "\x00" x 160));
-rcv($sock_b, $port_a, rtpm(8, 1034, 7160, 0x1234, "\x00" x 160));
+rcv($sock_b, $port_a, rtpm(8, 1032, 7160, 0x1234, "\x00" x 160));