FreeCalypso > hg > sipout-test-utils

annotate test-fsk/rtp_rx.c @ 13:059b79c9f0c3

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sipout-test-voice: add DMW output mode
author Mychaela Falconia <falcon@freecalypso.org>
date Sun, 07 Apr 2024 17:09:32 -0800
parents eaf0e8f81a22
children
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Mychaela Falconia <falcon@freecalypso.org>
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1 /*
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Mychaela Falconia <falcon@freecalypso.org>
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2 * In this module we implement our RTP handling: obtaining a PSTN-side
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3 * RTP endpoint from themwi-rtp-mgr, then handling read select on RTP
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4 * and RTCP UDP sockets.
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Mychaela Falconia <falcon@freecalypso.org>
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5 */
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6
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7 #include <sys/types.h>
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Mychaela Falconia <falcon@freecalypso.org>
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8 #include <sys/socket.h>
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Mychaela Falconia <falcon@freecalypso.org>
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9 #include <netinet/in.h>
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10 #include <stdio.h>
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11 #include <stdint.h>
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12 #include <stdlib.h>
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13 #include <string.h>
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Mychaela Falconia <falcon@freecalypso.org>
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14 #include <strings.h>
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Mychaela Falconia <falcon@freecalypso.org>
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15 #include "../include/tmgw_const.h"
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Mychaela Falconia <falcon@freecalypso.org>
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16 #include "../include/rtp_defs.h"
6
ba66d297fe57 test-fsk: first attempt at modem Rx
Mychaela Falconia <falcon@freecalypso.org>
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17 #include "../include/pstn_defs.h"
0
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18 #include "../librtpalloc/rtp_alloc_simple.h"
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19
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ba66d297fe57 test-fsk: first attempt at modem Rx
Mychaela Falconia <falcon@freecalypso.org>
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20 extern const uint16_t pcmu_decode_table[256];
ba66d297fe57 test-fsk: first attempt at modem Rx
Mychaela Falconia <falcon@freecalypso.org>
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21 extern const uint16_t pcma_decode_table[256];
ba66d297fe57 test-fsk: first attempt at modem Rx
Mychaela Falconia <falcon@freecalypso.org>
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22
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eaf0e8f81a22 test-fsk: don't feed RTP to modem Rx during ringing
Mychaela Falconia <falcon@freecalypso.org>
parents: 6
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23 extern int rtp_out_enable; /* misusing the flag :-( */
eaf0e8f81a22 test-fsk: don't feed RTP to modem Rx during ringing
Mychaela Falconia <falcon@freecalypso.org>
parents: 6
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24
0
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25 struct sockaddr_in rtp_local_addr;
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Mychaela Falconia <falcon@freecalypso.org>
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26 int rtp_udp_fd, rtcp_udp_fd;
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27
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28 static int rtp_start_flag, rtp_bad_flag, rtp_ssrc_chg_flag;
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29 static int rtp_seq_brk_flag, rtp_seq_zero_flag, rtp_seq_neg_flag;
35c0d9f03c0a beginning with sipout-test-voice,
Mychaela Falconia <falcon@freecalypso.org>
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30 static int rtp_ts_brk_flag;
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Mychaela Falconia <falcon@freecalypso.org>
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31 static uint32_t rtp_ssrc;
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Mychaela Falconia <falcon@freecalypso.org>
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32 static uint32_t rtp_last_ts;
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Mychaela Falconia <falcon@freecalypso.org>
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33 static uint16_t rtp_last_seq;
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34 static int got_some_rtcp;
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35
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Mychaela Falconia <falcon@freecalypso.org>
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36 void
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Mychaela Falconia <falcon@freecalypso.org>
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37 obtain_rtp_endp()
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Mychaela Falconia <falcon@freecalypso.org>
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38 {
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Mychaela Falconia <falcon@freecalypso.org>
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39 int rc;
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Mychaela Falconia <falcon@freecalypso.org>
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40 struct rtp_alloc_simple res;
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41
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42 rc = rtp_alloc_simple(TMGW_EP_TYPE_PSTN_ONLY, &res);
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Mychaela Falconia <falcon@freecalypso.org>
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43 if (rc < 0)
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Mychaela Falconia <falcon@freecalypso.org>
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44 exit(1); /* error msg already printed */
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Mychaela Falconia <falcon@freecalypso.org>
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45 bcopy(&res.pstn_addr, &rtp_local_addr, sizeof(struct sockaddr_in));
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Mychaela Falconia <falcon@freecalypso.org>
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46 rtp_udp_fd = res.pstn_rtp_fd;
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47 rtcp_udp_fd = res.pstn_rtcp_fd;
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48 }
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49
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Mychaela Falconia <falcon@freecalypso.org>
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50 void
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51 rtp_rx_select()
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Mychaela Falconia <falcon@freecalypso.org>
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52 {
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Mychaela Falconia <falcon@freecalypso.org>
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53 struct rtp_packet pkt;
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Mychaela Falconia <falcon@freecalypso.org>
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54 struct sockaddr_in sin_from;
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Mychaela Falconia <falcon@freecalypso.org>
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55 socklen_t addrlen;
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Mychaela Falconia <falcon@freecalypso.org>
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56 int16_t seq_delta;
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Mychaela Falconia <falcon@freecalypso.org>
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57 int32_t ts_delta;
6
ba66d297fe57 test-fsk: first attempt at modem Rx
Mychaela Falconia <falcon@freecalypso.org>
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58 const uint16_t *pcm_dec_table;
ba66d297fe57 test-fsk: first attempt at modem Rx
Mychaela Falconia <falcon@freecalypso.org>
parents: 3
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59 int16_t pcm_samples[FRAME_20MS];
ba66d297fe57 test-fsk: first attempt at modem Rx
Mychaela Falconia <falcon@freecalypso.org>
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60 unsigned n;
0
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61 int rc;
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62
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63 addrlen = sizeof(struct sockaddr_in);
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64 rc = recvfrom(rtp_udp_fd, &pkt, sizeof pkt, 0,
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65 (struct sockaddr *) &sin_from, &addrlen);
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66 if (rc < 0)
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67 return;
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68 if (rc != RTP_PACKET_SIZE_PSTN) {
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Mychaela Falconia <falcon@freecalypso.org>
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69 bad_rtp_pkt: if (!rtp_bad_flag) {
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70 printf("Got a bad RTP packet\n");
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71 rtp_bad_flag = 1;
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Mychaela Falconia <falcon@freecalypso.org>
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72 }
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73 return;
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Mychaela Falconia <falcon@freecalypso.org>
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74 }
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75 if (pkt.v_p_x_cc != 0x80)
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76 goto bad_rtp_pkt;
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77 switch (pkt.m_pt & 0x7F) {
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Mychaela Falconia <falcon@freecalypso.org>
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78 case PSTN_CODEC_PCMU:
6
ba66d297fe57 test-fsk: first attempt at modem Rx
Mychaela Falconia <falcon@freecalypso.org>
parents: 3
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79 pcm_dec_table = pcmu_decode_table;
ba66d297fe57 test-fsk: first attempt at modem Rx
Mychaela Falconia <falcon@freecalypso.org>
parents: 3
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80 break;
0
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Mychaela Falconia <falcon@freecalypso.org>
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81 case PSTN_CODEC_PCMA:
6
ba66d297fe57 test-fsk: first attempt at modem Rx
Mychaela Falconia <falcon@freecalypso.org>
parents: 3
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82 pcm_dec_table = pcma_decode_table;
0
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83 break;
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84 default:
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85 goto bad_rtp_pkt;
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Mychaela Falconia <falcon@freecalypso.org>
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86 }
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Mychaela Falconia <falcon@freecalypso.org>
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87 if (rtp_start_flag && pkt.ssrc != rtp_ssrc) {
35c0d9f03c0a beginning with sipout-test-voice,
Mychaela Falconia <falcon@freecalypso.org>
parents:
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88 if (!rtp_ssrc_chg_flag) {
35c0d9f03c0a beginning with sipout-test-voice,
Mychaela Falconia <falcon@freecalypso.org>
parents:
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89 printf("Rx RTP stream changed SSRC\n");
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Mychaela Falconia <falcon@freecalypso.org>
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90 rtp_ssrc_chg_flag = 1;
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Mychaela Falconia <falcon@freecalypso.org>
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91 }
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Mychaela Falconia <falcon@freecalypso.org>
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92 } else if (rtp_start_flag) {
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Mychaela Falconia <falcon@freecalypso.org>
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93 seq_delta = ntohs(pkt.seq) - rtp_last_seq;
35c0d9f03c0a beginning with sipout-test-voice,
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94 ts_delta = ntohl(pkt.tstamp) - rtp_last_ts;
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95 if (seq_delta == 0) {
35c0d9f03c0a beginning with sipout-test-voice,
Mychaela Falconia <falcon@freecalypso.org>
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96 if (!rtp_seq_zero_flag) {
35c0d9f03c0a beginning with sipout-test-voice,
Mychaela Falconia <falcon@freecalypso.org>
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97 printf("Rx RTP seq zero increment\n");
35c0d9f03c0a beginning with sipout-test-voice,
Mychaela Falconia <falcon@freecalypso.org>
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98 rtp_seq_zero_flag = 1;
35c0d9f03c0a beginning with sipout-test-voice,
Mychaela Falconia <falcon@freecalypso.org>
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99 }
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Mychaela Falconia <falcon@freecalypso.org>
parents:
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100 return;
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Mychaela Falconia <falcon@freecalypso.org>
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101 }
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Mychaela Falconia <falcon@freecalypso.org>
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102 if (seq_delta < 0) {
35c0d9f03c0a beginning with sipout-test-voice,
Mychaela Falconia <falcon@freecalypso.org>
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103 if (!rtp_seq_neg_flag) {
35c0d9f03c0a beginning with sipout-test-voice,
Mychaela Falconia <falcon@freecalypso.org>
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104 printf("Rx RTP seq negative increment\n");
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Mychaela Falconia <falcon@freecalypso.org>
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105 rtp_seq_neg_flag = 1;
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Mychaela Falconia <falcon@freecalypso.org>
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106 }
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Mychaela Falconia <falcon@freecalypso.org>
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107 return;
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Mychaela Falconia <falcon@freecalypso.org>
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108 }
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Mychaela Falconia <falcon@freecalypso.org>
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109 if (seq_delta != 1) {
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Mychaela Falconia <falcon@freecalypso.org>
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110 if (!rtp_seq_brk_flag) {
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Mychaela Falconia <falcon@freecalypso.org>
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111 printf("Rx RTP stream seq break\n");
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Mychaela Falconia <falcon@freecalypso.org>
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112 rtp_seq_brk_flag = 1;
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Mychaela Falconia <falcon@freecalypso.org>
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113 }
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Mychaela Falconia <falcon@freecalypso.org>
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114 } else if (ts_delta != 160) {
35c0d9f03c0a beginning with sipout-test-voice,
Mychaela Falconia <falcon@freecalypso.org>
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115 if (!rtp_ts_brk_flag) {
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116 printf("Rx RTP stream tstamp break\n");
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Mychaela Falconia <falcon@freecalypso.org>
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117 rtp_ts_brk_flag = 1;
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Mychaela Falconia <falcon@freecalypso.org>
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118 }
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Mychaela Falconia <falcon@freecalypso.org>
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119 }
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Mychaela Falconia <falcon@freecalypso.org>
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120 }
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Mychaela Falconia <falcon@freecalypso.org>
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121 rtp_ssrc = pkt.ssrc;
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Mychaela Falconia <falcon@freecalypso.org>
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122 rtp_last_ts = ntohl(pkt.tstamp);
35c0d9f03c0a beginning with sipout-test-voice,
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123 rtp_last_seq = ntohs(pkt.seq);
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Mychaela Falconia <falcon@freecalypso.org>
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124 if (!rtp_start_flag) {
35c0d9f03c0a beginning with sipout-test-voice,
Mychaela Falconia <falcon@freecalypso.org>
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125 printf("Rx RTP stream begins with seq=%u ts=%u\n",
35c0d9f03c0a beginning with sipout-test-voice,
Mychaela Falconia <falcon@freecalypso.org>
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126 rtp_last_seq, rtp_last_ts);
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127 rtp_start_flag = 1;
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128 }
8
eaf0e8f81a22 test-fsk: don't feed RTP to modem Rx during ringing
Mychaela Falconia <falcon@freecalypso.org>
parents: 6
diff changeset
129 /* ignore early RTP during ringing, before answer supervision */
eaf0e8f81a22 test-fsk: don't feed RTP to modem Rx during ringing
Mychaela Falconia <falcon@freecalypso.org>
parents: 6
diff changeset
130 if (!rtp_out_enable)
eaf0e8f81a22 test-fsk: don't feed RTP to modem Rx during ringing
Mychaela Falconia <falcon@freecalypso.org>
parents: 6
diff changeset
131 return;
eaf0e8f81a22 test-fsk: don't feed RTP to modem Rx during ringing
Mychaela Falconia <falcon@freecalypso.org>
parents: 6
diff changeset
132 /* feed samples to modem Rx */
6
ba66d297fe57 test-fsk: first attempt at modem Rx
Mychaela Falconia <falcon@freecalypso.org>
parents: 3
diff changeset
133 for (n = 0; n < FRAME_20MS; n++)
ba66d297fe57 test-fsk: first attempt at modem Rx
Mychaela Falconia <falcon@freecalypso.org>
parents: 3
diff changeset
134 pcm_samples[n] = pcm_dec_table[pkt.payload[n]];
ba66d297fe57 test-fsk: first attempt at modem Rx
Mychaela Falconia <falcon@freecalypso.org>
parents: 3
diff changeset
135 process_rx_frame(pcm_samples);
0
35c0d9f03c0a beginning with sipout-test-voice,
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
136 }
35c0d9f03c0a beginning with sipout-test-voice,
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
137
35c0d9f03c0a beginning with sipout-test-voice,
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
138 void
35c0d9f03c0a beginning with sipout-test-voice,
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
139 rtcp_rx_select()
35c0d9f03c0a beginning with sipout-test-voice,
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
140 {
35c0d9f03c0a beginning with sipout-test-voice,
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
141 u_char buf[512];
35c0d9f03c0a beginning with sipout-test-voice,
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
142
35c0d9f03c0a beginning with sipout-test-voice,
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
143 recv(rtcp_udp_fd, buf, sizeof buf, 0);
35c0d9f03c0a beginning with sipout-test-voice,
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
144 if (!got_some_rtcp) {
35c0d9f03c0a beginning with sipout-test-voice,
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
145 printf("Got some RTCP\n");
35c0d9f03c0a beginning with sipout-test-voice,
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
146 got_some_rtcp = 1;
35c0d9f03c0a beginning with sipout-test-voice,
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
147 }
35c0d9f03c0a beginning with sipout-test-voice,
Mychaela Falconia <falcon@freecalypso.org>
parents:
diff changeset
148 }