res_rtp_asterisk: Remove some unused structure fields.

All of the fields that were removed were no longer referenced except for
'lastrxts' and 'rxseqno' which were only ever written to.

Change-Id: I5a5d31eb33e97663843698f58d0d97f22a76627c

res/res_rtp_asterisk.c

@@ -304,12 +304,10 @@ struct ast_rtp {
 	unsigned int themssrc;		/*!< Their SSRC */
 	unsigned int themssrc_valid;	/*!< True if their SSRC is available. */
 	unsigned int lastts;
-	unsigned int lastrxts;
 	unsigned int lastividtimestamp;
 	unsigned int lastovidtimestamp;
 	unsigned int lastitexttimestamp;
 	unsigned int lastotexttimestamp;
-	unsigned int lasteventseqn;
 	int lastrxseqno;                /*!< Last received sequence number */
 	unsigned short seedrxseqno;     /*!< What sequence number did they start with?*/
 	unsigned int seedrxts;          /*!< What RTP timestamp did they start with? */
@@ -323,10 +321,6 @@ struct ast_rtp {
 	struct ast_format *lasttxformat;
 	struct ast_format *lastrxformat;
 
-	int rtptimeout;			/*!< RTP timeout time (negative or zero means disabled, negative value means temporarily disabled) */
-	int rtpholdtimeout;		/*!< RTP timeout when on hold (negative or zero means disabled, negative value means temporarily disabled). */
-	int rtpkeepalive;		/*!< Send RTP comfort noice packets for keepalive */
-
 	/* DTMF Reception Variables */
 	char resp;                        /*!< The current digit being processed */
 	unsigned int last_seqno;          /*!< The last known sequence number for any DTMF packet */
@@ -345,17 +339,11 @@ struct ast_rtp {
 	struct timeval rxcore;
 	struct timeval txcore;
 	double drxcore;                 /*!< The double representation of the first received packet */
-	struct timeval lastrx;          /*!< timeval when we last received a packet */
 	struct timeval dtmfmute;
 	struct ast_smoother *smoother;
-	int *ioid;
 	unsigned short seqno;		/*!< Sequence number, RFC 3550, page 13. */
-	unsigned short rxseqno;
 	struct ast_sched_context *sched;
-	struct io_context *io;
-	void *data;
 	struct ast_rtcp *rtcp;
-	struct ast_rtp *bridged;        /*!< Who we are Packet bridged to */
 	unsigned int asymmetric_codec;  /*!< Indicate if asymmetric send/receive codecs are allowed */
 
 	enum strict_rtp_state strict_rtp_state; /*!< Current state that strict RTP protection is in */
@@ -5558,7 +5546,6 @@ static struct ast_frame *ast_rtp_read(struct ast_rtp_instance *instance, int rtc
 				ast_sockaddr_copy(&rtp->rtcp->them, &addr);
 				ast_sockaddr_set_port(&rtp->rtcp->them, ast_sockaddr_port(&addr) + 1);
 			}
-			rtp->rxseqno = 0;
 			ast_set_flag(rtp, FLAG_NAT_ACTIVE);
 			if (rtpdebug)
 				ast_debug(0, "RTP NAT: Got audio from other end. Now sending to address %s\n",
@@ -5743,7 +5730,6 @@ static struct ast_frame *ast_rtp_read(struct ast_rtp_instance *instance, int rtc
 			ast_codec_media_type2str(ast_format_get_type(rtp->f.subclass.format)));
 		return &ast_null_frame;
 	}
-	rtp->rxseqno = seqno;
 
 	if (rtp->dtmf_timeout && rtp->dtmf_timeout < timestamp) {
 		rtp->dtmf_timeout = 0;
@@ -5759,8 +5745,6 @@ static struct ast_frame *ast_rtp_read(struct ast_rtp_instance *instance, int rtc
 		}
 	}
 
-	rtp->lastrxts = timestamp;
-
 	rtp->f.src = "RTP";
 	rtp->f.mallocd = 0;
 	rtp->f.datalen = res - hdrlen;
@@ -6058,8 +6042,6 @@ static void ast_rtp_remote_address_set(struct ast_rtp_instance *instance, struct
 		rtp->rtcp->local_addr_str = ast_strdup(ast_sockaddr_stringify(&local));
 	}
 
-	rtp->rxseqno = 0;
-
 	if (strictrtp && rtp->strict_rtp_state != STRICT_RTP_OPEN
 		&& !ast_sockaddr_isnull(addr) && ast_sockaddr_cmp(addr, &rtp->strict_rtp_address)) {
 		/* We only need to learn a new strict source address if we've been told the source is