2002-06-16 16:06:38 +00:00
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/*
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* Asterisk -- A telephony toolkit for Linux.
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*
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* Real-time Protocol Support
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*
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* Copyright (C) 1999, Mark Spencer
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*
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* Mark Spencer <markster@linux-support.net>
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*
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* This program is free software, distributed under the terms of
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* the GNU General Public License
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <pthread.h>
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#include <string.h>
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#include <sys/time.h>
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#include <signal.h>
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#include <errno.h>
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#include <unistd.h>
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#include <netinet/in.h>
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#include <sys/time.h>
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#include <sys/socket.h>
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#include <arpa/inet.h>
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#include <fcntl.h>
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#include <asterisk/rtp.h>
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2002-08-09 17:17:54 +00:00
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#include <asterisk/frame.h>
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2002-06-16 16:06:38 +00:00
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#include <asterisk/logger.h>
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#include <asterisk/options.h>
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#include <asterisk/channel.h>
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2003-02-05 19:26:49 +00:00
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#define TYPE_SILENCE 0x2
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#define TYPE_HIGH 0x0
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#define TYPE_LOW 0x1
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#define TYPE_MASK 0x3
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2002-06-16 16:06:38 +00:00
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static int dtmftimeout = 300; /* 300 samples */
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struct ast_rtp {
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int s;
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char resp;
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struct ast_frame f;
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unsigned char rawdata[1024 + AST_FRIENDLY_OFFSET];
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unsigned int ssrc;
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unsigned int lastts;
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unsigned int lastrxts;
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2003-02-05 19:26:49 +00:00
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int lasttxformat;
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2002-06-16 16:06:38 +00:00
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int dtmfcount;
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struct sockaddr_in us;
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struct sockaddr_in them;
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struct timeval rxcore;
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struct timeval txcore;
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2002-08-09 17:17:54 +00:00
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struct ast_smoother *smoother;
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2002-06-16 16:06:38 +00:00
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int *ioid;
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unsigned short seqno;
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struct sched_context *sched;
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struct io_context *io;
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void *data;
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ast_rtp_callback callback;
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};
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2003-02-05 19:26:49 +00:00
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static int g723_len(unsigned char buf)
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{
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switch(buf & TYPE_MASK) {
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case TYPE_MASK:
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case TYPE_SILENCE:
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return 4;
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break;
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case TYPE_HIGH:
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return 24;
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break;
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case TYPE_LOW:
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return 20;
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break;
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default:
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ast_log(LOG_WARNING, "Badly encoded frame (%d)\n", buf & TYPE_MASK);
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}
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return -1;
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}
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static int g723_samples(unsigned char *buf, int maxlen)
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{
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int pos = 0;
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int samples = 0;
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int res;
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while(pos < maxlen) {
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res = g723_len(buf[pos]);
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if (res < 0)
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break;
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samples += 240;
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pos += res;
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}
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return samples;
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}
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2002-06-16 16:06:38 +00:00
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void ast_rtp_set_data(struct ast_rtp *rtp, void *data)
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{
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rtp->data = data;
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}
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void ast_rtp_set_callback(struct ast_rtp *rtp, ast_rtp_callback callback)
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{
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rtp->callback = callback;
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}
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static void send_dtmf(struct ast_rtp *rtp)
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{
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printf("Sending dtmf: %d (%c)\n", rtp->resp, rtp->resp);
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rtp->f.frametype = AST_FRAME_DTMF;
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rtp->f.subclass = rtp->resp;
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rtp->f.datalen = 0;
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2003-02-05 19:26:49 +00:00
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rtp->f.samples = 0;
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2002-06-16 16:06:38 +00:00
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rtp->f.mallocd = 0;
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rtp->f.src = "RTP";
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rtp->resp = 0;
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if (rtp->callback)
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rtp->callback(rtp, &rtp->f, rtp->data);
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}
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static void process_rfc2833(struct ast_rtp *rtp, unsigned char *data, int len)
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{
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unsigned int event;
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char resp = 0;
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event = ntohl(*((unsigned int *)(data)));
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event >>= 24;
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#if 0
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printf("Event: %08x (len = %d)\n", event, len);
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#endif
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if (event < 10) {
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resp = '0' + event;
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} else if (event < 11) {
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resp = '*';
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} else if (event < 12) {
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resp = '#';
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} else if (event < 16) {
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resp = 'A' + (event - 12);
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}
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if (rtp->resp && (rtp->resp != resp)) {
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send_dtmf(rtp);
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}
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rtp->resp = resp;
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rtp->dtmfcount = dtmftimeout;
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}
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2002-08-09 17:17:54 +00:00
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static void process_type121(struct ast_rtp *rtp, unsigned char *data, int len)
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{
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char resp = 0;
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unsigned char b0,b1,b2,b3,b4,b5,b6,b7;
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b0=*(data+0);b1=*(data+1);b2=*(data+2);b3=*(data+3);
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b4=*(data+4);b5=*(data+5);b6=*(data+6);b7=*(data+7);
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// printf("%u %u %u %u %u %u %u %u\n",b0,b1,b2,b3,b4,b5,b6,b7);
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if (b2==32) {
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// printf("Start %d\n",b3);
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if (b4==0) {
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// printf("Detection point for DTMF %d\n",b3);
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if (b3<10) {
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resp='0'+b3;
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} else if (b3<11) {
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resp='*';
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} else if (b3<12) {
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resp='#';
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} else if (b3<16) {
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resp='A'+(b3-12);
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}
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rtp->resp=resp;
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send_dtmf(rtp);
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}
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}
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if (b2==3) {
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// printf("Stop(3) %d\n",b3);
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}
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if (b2==0) {
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// printf("Stop(0) %d\n",b3);
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}
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}
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2002-06-16 16:06:38 +00:00
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static int rtpread(int *id, int fd, short events, void *cbdata)
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{
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struct ast_rtp *rtp = cbdata;
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int res;
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struct sockaddr_in sin;
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int len;
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unsigned int seqno;
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int payloadtype;
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int hdrlen = 12;
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unsigned int timestamp;
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unsigned int *rtpheader;
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len = sizeof(sin);
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res = recvfrom(rtp->s, rtp->rawdata + AST_FRIENDLY_OFFSET, sizeof(rtp->rawdata) - AST_FRIENDLY_OFFSET,
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0, (struct sockaddr *)&sin, &len);
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rtpheader = (unsigned int *)(rtp->rawdata + AST_FRIENDLY_OFFSET);
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if (res < 0) {
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ast_log(LOG_WARNING, "RTP Read error: %s\n", strerror(errno));
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if (errno == EBADF)
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CRASH;
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return 1;
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}
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if (res < hdrlen) {
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ast_log(LOG_WARNING, "RTP Read too short\n");
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return 1;
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}
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/* Get fields */
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seqno = ntohl(rtpheader[0]);
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payloadtype = (seqno & 0x7f0000) >> 16;
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seqno &= 0xffff;
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timestamp = ntohl(rtpheader[1]);
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#if 0
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printf("Got RTP packet from %s:%d (type %d, seq %d, ts %d, len = %d)\n", inet_ntoa(sin.sin_addr), ntohs(sin.sin_port), payloadtype, seqno, timestamp,res - hdrlen);
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#endif
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rtp->f.frametype = AST_FRAME_VOICE;
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rtp->f.subclass = rtp2ast(payloadtype);
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if (rtp->f.subclass < 0) {
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if (payloadtype == 101) {
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/* It's special -- rfc2833 process it */
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process_rfc2833(rtp, rtp->rawdata + AST_FRIENDLY_OFFSET + hdrlen, res - hdrlen);
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2002-08-09 17:17:54 +00:00
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} else if (payloadtype == 121) {
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/* CISCO proprietary DTMF bridge */
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process_type121(rtp, rtp->rawdata + AST_FRIENDLY_OFFSET + hdrlen, res - hdrlen);
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2003-02-05 19:26:49 +00:00
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} else if (payloadtype == 100) {
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/* CISCO's notso proprietary DTMF bridge */
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process_rfc2833(rtp, rtp->rawdata + AST_FRIENDLY_OFFSET + hdrlen, res - hdrlen);
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2002-08-09 17:17:54 +00:00
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} else {
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2002-06-16 16:06:38 +00:00
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ast_log(LOG_NOTICE, "Unknown RTP codec %d received\n", payloadtype);
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2002-08-09 17:17:54 +00:00
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}
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2002-06-16 16:06:38 +00:00
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return 1;
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}
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if (!rtp->lastrxts)
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rtp->lastrxts = timestamp;
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if (rtp->dtmfcount) {
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#if 0
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printf("dtmfcount was %d\n", rtp->dtmfcount);
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#endif
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rtp->dtmfcount -= (timestamp - rtp->lastrxts);
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if (rtp->dtmfcount < 0)
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rtp->dtmfcount = 0;
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#if 0
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if (dtmftimeout != rtp->dtmfcount)
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printf("dtmfcount is %d\n", rtp->dtmfcount);
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#endif
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}
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rtp->lastrxts = timestamp;
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/* Send any pending DTMF */
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if (rtp->resp && !rtp->dtmfcount) {
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send_dtmf(rtp);
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/* Setup the voice frame again */
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rtp->f.frametype = AST_FRAME_VOICE;
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rtp->f.subclass = rtp2ast(payloadtype);
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}
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rtp->f.mallocd = 0;
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rtp->f.datalen = res - hdrlen;
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rtp->f.data = rtp->rawdata + hdrlen + AST_FRIENDLY_OFFSET;
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rtp->f.offset = hdrlen + AST_FRIENDLY_OFFSET;
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switch(rtp->f.subclass) {
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case AST_FORMAT_ULAW:
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case AST_FORMAT_ALAW:
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2003-02-05 19:26:49 +00:00
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rtp->f.samples = rtp->f.datalen;
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2002-06-16 16:06:38 +00:00
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break;
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case AST_FORMAT_SLINEAR:
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2003-02-05 19:26:49 +00:00
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rtp->f.samples = rtp->f.datalen / 2;
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2002-06-16 16:06:38 +00:00
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break;
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case AST_FORMAT_GSM:
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2003-02-05 19:26:49 +00:00
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rtp->f.samples = 160 * (rtp->f.datalen / 33);
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2002-06-16 16:06:38 +00:00
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break;
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case AST_FORMAT_ADPCM:
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2003-02-05 19:26:49 +00:00
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rtp->f.samples = rtp->f.datalen * 2;
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2002-08-09 17:17:54 +00:00
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break;
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case AST_FORMAT_G729A:
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2003-02-05 19:26:49 +00:00
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rtp->f.samples = rtp->f.datalen * 8;
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break;
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case AST_FORMAT_G723_1:
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rtp->f.samples = g723_samples(rtp->f.data, rtp->f.datalen);
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2002-06-16 16:06:38 +00:00
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break;
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default:
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2003-02-05 19:26:49 +00:00
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ast_log(LOG_NOTICE, "Unable to calculate samples for format %d\n", rtp->f.subclass);
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2002-06-16 16:06:38 +00:00
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break;
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}
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rtp->f.src = "RTP";
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if (rtp->callback)
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rtp->callback(rtp, &rtp->f, rtp->data);
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return 1;
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}
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static struct {
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int rtp;
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int ast;
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2002-08-09 17:17:54 +00:00
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char *label;
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2002-06-16 16:06:38 +00:00
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} cmap[] = {
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2002-08-09 17:17:54 +00:00
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{ 0, AST_FORMAT_ULAW, "PCMU" },
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{ 3, AST_FORMAT_GSM, "GSM" },
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{ 4, AST_FORMAT_G723_1, "G723" },
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{ 5, AST_FORMAT_ADPCM, "ADPCM" },
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{ 8, AST_FORMAT_ALAW, "PCMA" },
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{ 18, AST_FORMAT_G729A, "G729" },
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2002-06-16 16:06:38 +00:00
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};
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int rtp2ast(int id)
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{
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int x;
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for (x=0;x<sizeof(cmap) / sizeof(cmap[0]); x++) {
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if (cmap[x].rtp == id)
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return cmap[x].ast;
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}
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return -1;
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}
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int ast2rtp(int id)
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{
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int x;
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for (x=0;x<sizeof(cmap) / sizeof(cmap[0]); x++) {
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if (cmap[x].ast == id)
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return cmap[x].rtp;
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}
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return -1;
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}
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2002-08-09 17:17:54 +00:00
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char *ast2rtpn(int id)
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{
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int x;
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for (x=0;x<sizeof(cmap) / sizeof(cmap[0]); x++) {
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if (cmap[x].ast == id)
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return cmap[x].label;
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}
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return "";
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}
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2002-06-16 16:06:38 +00:00
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struct ast_rtp *ast_rtp_new(struct sched_context *sched, struct io_context *io)
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{
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struct ast_rtp *rtp;
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int x;
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int flags;
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|
|
rtp = malloc(sizeof(struct ast_rtp));
|
|
|
|
if (!rtp)
|
|
|
|
return NULL;
|
|
|
|
memset(rtp, 0, sizeof(struct ast_rtp));
|
|
|
|
rtp->them.sin_family = AF_INET;
|
|
|
|
rtp->us.sin_family = AF_INET;
|
|
|
|
rtp->s = socket(AF_INET, SOCK_DGRAM, 0);
|
|
|
|
rtp->ssrc = rand();
|
|
|
|
rtp->seqno = rand() & 0xffff;
|
|
|
|
if (rtp->s < 0) {
|
|
|
|
free(rtp);
|
|
|
|
ast_log(LOG_WARNING, "Unable to allocate socket: %s\n", strerror(errno));
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
flags = fcntl(rtp->s, F_GETFL);
|
|
|
|
fcntl(rtp->s, F_SETFL, flags | O_NONBLOCK);
|
|
|
|
for (;;) {
|
|
|
|
/* Find us a place */
|
|
|
|
x = (rand() % (65000-1025)) + 1025;
|
|
|
|
/* Must be an even port number by RTP spec */
|
|
|
|
x = x & ~1;
|
|
|
|
rtp->us.sin_port = htons(x);
|
|
|
|
if (!bind(rtp->s, &rtp->us, sizeof(rtp->us)))
|
|
|
|
break;
|
|
|
|
if (errno != EADDRINUSE) {
|
|
|
|
ast_log(LOG_WARNING, "Unexpected bind error: %s\n", strerror(errno));
|
|
|
|
close(rtp->s);
|
|
|
|
free(rtp);
|
|
|
|
return NULL;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
rtp->io = io;
|
|
|
|
rtp->sched = sched;
|
|
|
|
rtp->ioid = ast_io_add(rtp->io, rtp->s, rtpread, AST_IO_IN, rtp);
|
|
|
|
return rtp;
|
|
|
|
}
|
|
|
|
|
2003-02-05 19:26:49 +00:00
|
|
|
int ast_rtp_settos(struct ast_rtp *rtp, int tos)
|
|
|
|
{
|
|
|
|
int res;
|
|
|
|
if ((res = setsockopt(rtp->s, SOL_IP, IP_TOS, &tos, sizeof(tos))))
|
|
|
|
ast_log(LOG_WARNING, "Unable to set TOS to %d\n", tos);
|
|
|
|
return res;
|
|
|
|
}
|
|
|
|
|
2002-06-16 16:06:38 +00:00
|
|
|
void ast_rtp_set_peer(struct ast_rtp *rtp, struct sockaddr_in *them)
|
|
|
|
{
|
|
|
|
rtp->them.sin_port = them->sin_port;
|
|
|
|
rtp->them.sin_addr = them->sin_addr;
|
|
|
|
}
|
|
|
|
|
2003-02-05 19:26:49 +00:00
|
|
|
void ast_rtp_get_peer(struct ast_rtp *rtp, struct sockaddr_in *them)
|
|
|
|
{
|
|
|
|
them->sin_family = AF_INET;
|
|
|
|
them->sin_port = rtp->them.sin_port;
|
|
|
|
them->sin_addr = rtp->them.sin_addr;
|
|
|
|
}
|
|
|
|
|
2002-06-16 16:06:38 +00:00
|
|
|
void ast_rtp_get_us(struct ast_rtp *rtp, struct sockaddr_in *us)
|
|
|
|
{
|
|
|
|
memcpy(us, &rtp->us, sizeof(rtp->us));
|
|
|
|
}
|
|
|
|
|
|
|
|
void ast_rtp_destroy(struct ast_rtp *rtp)
|
|
|
|
{
|
2002-08-09 17:17:54 +00:00
|
|
|
if (rtp->smoother)
|
|
|
|
ast_smoother_free(rtp->smoother);
|
2002-06-16 16:06:38 +00:00
|
|
|
if (rtp->ioid)
|
|
|
|
ast_io_remove(rtp->io, rtp->ioid);
|
|
|
|
if (rtp->s > -1)
|
|
|
|
close(rtp->s);
|
|
|
|
free(rtp);
|
|
|
|
}
|
|
|
|
|
|
|
|
static unsigned int calc_txstamp(struct ast_rtp *rtp)
|
|
|
|
{
|
|
|
|
struct timeval now;
|
|
|
|
unsigned int ms;
|
|
|
|
if (!rtp->txcore.tv_sec && !rtp->txcore.tv_usec) {
|
|
|
|
gettimeofday(&rtp->txcore, NULL);
|
|
|
|
}
|
|
|
|
gettimeofday(&now, NULL);
|
|
|
|
ms = (now.tv_sec - rtp->txcore.tv_sec) * 1000;
|
2002-08-09 17:17:54 +00:00
|
|
|
ms += (now.tv_usec - rtp->txcore.tv_usec) / 1000;
|
2002-06-16 16:06:38 +00:00
|
|
|
return ms;
|
|
|
|
}
|
|
|
|
|
2003-02-05 19:26:49 +00:00
|
|
|
int ast_rtp_senddigit(struct ast_rtp *rtp, char digit)
|
|
|
|
{
|
|
|
|
unsigned int *rtpheader;
|
|
|
|
int hdrlen = 12;
|
|
|
|
int res;
|
|
|
|
int ms;
|
|
|
|
int pred;
|
|
|
|
int x;
|
|
|
|
char data[256];
|
|
|
|
|
|
|
|
if ((digit <= '9') && (digit >= '0'))
|
|
|
|
digit -= '0';
|
|
|
|
else if (digit == '*')
|
|
|
|
digit = 10;
|
|
|
|
else if (digit == '#')
|
|
|
|
digit = 11;
|
|
|
|
else if ((digit >= 'A') && (digit <= 'D'))
|
|
|
|
digit = digit - 'A' + 12;
|
|
|
|
else if ((digit >= 'a') && (digit <= 'd'))
|
|
|
|
digit = digit - 'a' + 12;
|
|
|
|
else {
|
|
|
|
ast_log(LOG_WARNING, "Don't know how to represent '%c'\n", digit);
|
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
/* If we have no peer, return immediately */
|
|
|
|
if (!rtp->them.sin_addr.s_addr)
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
ms = calc_txstamp(rtp);
|
|
|
|
/* Default prediction */
|
|
|
|
pred = ms * 8;
|
|
|
|
|
|
|
|
/* Get a pointer to the header */
|
|
|
|
rtpheader = (unsigned int *)data;
|
|
|
|
rtpheader[0] = htonl((2 << 30) | (1 << 23) | (101 << 16) | (rtp->seqno++));
|
|
|
|
rtpheader[1] = htonl(rtp->lastts);
|
|
|
|
rtpheader[2] = htonl(rtp->ssrc);
|
|
|
|
rtpheader[3] = htonl((digit << 24) | (0xa << 16) | (0));
|
|
|
|
for (x=0;x<4;x++) {
|
|
|
|
if (rtp->them.sin_port && rtp->them.sin_addr.s_addr) {
|
|
|
|
res = sendto(rtp->s, (void *)rtpheader, hdrlen + 4, 0, &rtp->them, sizeof(rtp->them));
|
|
|
|
if (res <0)
|
|
|
|
ast_log(LOG_NOTICE, "RTP Transmission error to %s:%d: %s\n", inet_ntoa(rtp->them.sin_addr), ntohs(rtp->them.sin_port), strerror(errno));
|
|
|
|
#if 0
|
|
|
|
printf("Sent %d bytes of RTP data to %s:%d\n", res, inet_ntoa(rtp->them.sin_addr), ntohs(rtp->them.sin_port));
|
|
|
|
#endif
|
|
|
|
}
|
|
|
|
if (x ==0) {
|
|
|
|
/* Clear marker bit and increment seqno */
|
|
|
|
rtpheader[0] = htonl((2 << 30) | (101 << 16) | (rtp->seqno++));
|
|
|
|
/* Make duration 240 */
|
|
|
|
rtpheader[3] |= htonl((240));
|
|
|
|
/* Set the End bit for the last 3 */
|
|
|
|
rtpheader[3] |= htonl((1 << 23));
|
|
|
|
}
|
|
|
|
}
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2002-08-09 17:17:54 +00:00
|
|
|
static int ast_rtp_raw_write(struct ast_rtp *rtp, struct ast_frame *f, int codec)
|
2002-06-16 16:06:38 +00:00
|
|
|
{
|
2002-08-09 17:17:54 +00:00
|
|
|
unsigned int *rtpheader;
|
2002-06-16 16:06:38 +00:00
|
|
|
int hdrlen = 12;
|
|
|
|
int res;
|
2002-08-09 17:17:54 +00:00
|
|
|
int ms;
|
|
|
|
int pred;
|
2002-06-16 16:06:38 +00:00
|
|
|
|
2002-08-09 17:17:54 +00:00
|
|
|
ms = calc_txstamp(rtp);
|
|
|
|
/* Default prediction */
|
|
|
|
pred = ms * 8;
|
|
|
|
|
2002-06-16 16:06:38 +00:00
|
|
|
switch(f->subclass) {
|
|
|
|
case AST_FORMAT_ULAW:
|
|
|
|
case AST_FORMAT_ALAW:
|
2002-08-09 17:17:54 +00:00
|
|
|
/* If we're within +/- 20ms from when where we
|
|
|
|
predict we should be, use that */
|
|
|
|
pred = rtp->lastts + f->datalen;
|
|
|
|
break;
|
|
|
|
case AST_FORMAT_G729A:
|
|
|
|
pred = rtp->lastts + f->datalen * 8;
|
2002-06-16 16:06:38 +00:00
|
|
|
break;
|
2003-02-05 19:26:49 +00:00
|
|
|
case AST_FORMAT_GSM:
|
|
|
|
pred = rtp->lastts + f->datalen * 20 / 33;
|
|
|
|
break;
|
|
|
|
case AST_FORMAT_G723_1:
|
|
|
|
pred = rtp->lastts + g723_samples(f->data, f->datalen);
|
|
|
|
break;
|
2002-06-16 16:06:38 +00:00
|
|
|
default:
|
|
|
|
ast_log(LOG_WARNING, "Not sure about timestamp format for codec format %d\n", f->subclass);
|
|
|
|
}
|
2002-08-09 17:17:54 +00:00
|
|
|
|
|
|
|
/* Re-calculate last TS */
|
|
|
|
rtp->lastts = ms * 8;
|
|
|
|
|
|
|
|
/* If it's close to ou prediction, go for it */
|
|
|
|
if (abs(rtp->lastts - pred) < 640)
|
|
|
|
rtp->lastts = pred;
|
|
|
|
#if 0
|
|
|
|
else
|
|
|
|
printf("Difference is %d, ms is %d\n", abs(rtp->lastts - pred), ms);
|
|
|
|
#endif
|
2002-06-16 16:06:38 +00:00
|
|
|
/* Get a pointer to the header */
|
|
|
|
rtpheader = (unsigned int *)(f->data - hdrlen);
|
|
|
|
rtpheader[0] = htonl((2 << 30) | (codec << 16) | (rtp->seqno++));
|
|
|
|
rtpheader[1] = htonl(rtp->lastts);
|
|
|
|
rtpheader[2] = htonl(rtp->ssrc);
|
|
|
|
if (rtp->them.sin_port && rtp->them.sin_addr.s_addr) {
|
|
|
|
res = sendto(rtp->s, (void *)rtpheader, f->datalen + hdrlen, 0, &rtp->them, sizeof(rtp->them));
|
|
|
|
if (res <0)
|
|
|
|
ast_log(LOG_NOTICE, "RTP Transmission error to %s:%d: %s\n", inet_ntoa(rtp->them.sin_addr), ntohs(rtp->them.sin_port), strerror(errno));
|
|
|
|
#if 0
|
|
|
|
printf("Sent %d bytes of RTP data to %s:%d\n", res, inet_ntoa(rtp->them.sin_addr), ntohs(rtp->them.sin_port));
|
|
|
|
#endif
|
|
|
|
}
|
|
|
|
return 0;
|
|
|
|
}
|
2002-08-09 17:17:54 +00:00
|
|
|
|
|
|
|
int ast_rtp_write(struct ast_rtp *rtp, struct ast_frame *_f)
|
|
|
|
{
|
|
|
|
struct ast_frame *f;
|
|
|
|
int codec;
|
|
|
|
int hdrlen = 12;
|
|
|
|
|
2003-02-05 19:26:49 +00:00
|
|
|
|
|
|
|
/* If we have no peer, return immediately */
|
|
|
|
if (!rtp->them.sin_addr.s_addr)
|
|
|
|
return 0;
|
2002-08-09 17:17:54 +00:00
|
|
|
|
2003-02-05 19:26:49 +00:00
|
|
|
/* Make sure we have enough space for RTP header */
|
2002-08-09 17:17:54 +00:00
|
|
|
if (_f->frametype != AST_FRAME_VOICE) {
|
|
|
|
ast_log(LOG_WARNING, "RTP can only send voice\n");
|
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
|
|
|
|
codec = ast2rtp(_f->subclass);
|
|
|
|
if (codec < 0) {
|
|
|
|
ast_log(LOG_WARNING, "Don't know how to send format %d packets with RTP\n", _f->subclass);
|
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
|
2003-02-05 19:26:49 +00:00
|
|
|
if (rtp->lasttxformat != _f->subclass) {
|
|
|
|
/* New format, reset the smoother */
|
|
|
|
ast_log(LOG_DEBUG, "Ooh, format changed from %d to %d\n", rtp->lasttxformat, _f->subclass);
|
|
|
|
rtp->lasttxformat = _f->subclass;
|
|
|
|
if (rtp->smoother)
|
|
|
|
ast_smoother_free(rtp->smoother);
|
|
|
|
rtp->smoother = NULL;
|
|
|
|
}
|
|
|
|
|
2002-08-09 17:17:54 +00:00
|
|
|
|
|
|
|
switch(_f->subclass) {
|
|
|
|
case AST_FORMAT_ULAW:
|
|
|
|
case AST_FORMAT_ALAW:
|
|
|
|
if (!rtp->smoother) {
|
|
|
|
rtp->smoother = ast_smoother_new(160);
|
|
|
|
}
|
|
|
|
if (!rtp->smoother) {
|
|
|
|
ast_log(LOG_WARNING, "Unable to create smoother :(\n");
|
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
ast_smoother_feed(rtp->smoother, _f);
|
|
|
|
|
|
|
|
while((f = ast_smoother_read(rtp->smoother)))
|
|
|
|
ast_rtp_raw_write(rtp, f, codec);
|
|
|
|
break;
|
|
|
|
case AST_FORMAT_G729A:
|
|
|
|
if (!rtp->smoother) {
|
|
|
|
rtp->smoother = ast_smoother_new(20);
|
|
|
|
}
|
|
|
|
if (!rtp->smoother) {
|
|
|
|
ast_log(LOG_WARNING, "Unable to create g729 smoother :(\n");
|
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
ast_smoother_feed(rtp->smoother, _f);
|
|
|
|
|
|
|
|
while((f = ast_smoother_read(rtp->smoother)))
|
|
|
|
ast_rtp_raw_write(rtp, f, codec);
|
|
|
|
break;
|
2003-02-05 19:26:49 +00:00
|
|
|
case AST_FORMAT_GSM:
|
|
|
|
if (!rtp->smoother) {
|
|
|
|
rtp->smoother = ast_smoother_new(33);
|
|
|
|
}
|
|
|
|
if (!rtp->smoother) {
|
|
|
|
ast_log(LOG_WARNING, "Unable to create GSM smoother :(\n");
|
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
ast_smoother_feed(rtp->smoother, _f);
|
|
|
|
while((f = ast_smoother_read(rtp->smoother)))
|
|
|
|
ast_rtp_raw_write(rtp, f, codec);
|
|
|
|
break;
|
2002-08-09 17:17:54 +00:00
|
|
|
default:
|
|
|
|
ast_log(LOG_WARNING, "Not sure about sending format %d packets\n", _f->subclass);
|
|
|
|
if (_f->offset < hdrlen) {
|
|
|
|
f = ast_frdup(_f);
|
|
|
|
} else {
|
|
|
|
f = _f;
|
|
|
|
}
|
|
|
|
ast_rtp_raw_write(rtp, f, codec);
|
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|