FreeCalypso > hg > sipout-test-utils

annotate tone-detect/g711-tone-detect.c @ 16:4f81b959a5f5

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sipout-test-voice: implement PCMU GSM uplink catcher
author Mychaela Falconia <falcon@freecalypso.org>
date Mon, 13 May 2024 22:10:25 -0800
parents ff535725e01f
children
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ff535725e01f g711-tone-detect program written
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1 /*
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2 * This program reads a G.711 sample stream recording (typically extracted
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3 * from an RTP stream pcap with rtp-g711-extr by the same author) and feeds
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4 * it to SpanDSP modem connection tone detector.
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5 */
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6
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7 #include <stdio.h>
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8 #include <stdint.h>
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9 #include <stdlib.h>
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10 #include <string.h>
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11 #include <strings.h>
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12 #include <spandsp.h>
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13 #include "../include/pstn_defs.h"
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14
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15 static char *data_filename;
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16 static int use_alaw, tone_type_sought;
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17 static g711_state_t *g711_dec_state;
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18 static modem_connect_tones_rx_state_t *tones_rx_state;
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19 static unsigned frame_count;
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20
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21 static void report_func(void *user_data, int code, int level, int delay)
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22 {
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23 printf("@%u.%03us: %s\n", frame_count / 50, (frame_count % 50) * 20,
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24 modem_connect_tone_to_str(code));
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25 }
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26
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27 main(argc, argv)
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28 char **argv;
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29 {
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30 FILE *inf;
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31 uint8_t g711_buf[FRAME_20MS];
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32 int16_t linear[FRAME_20MS];
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33 int cc;
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34
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35 switch (argc) {
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36 case 3:
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37 data_filename = argv[1];
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38 tone_type_sought = atoi(argv[2]);
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39 break;
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40 case 4:
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41 data_filename = argv[1];
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42 if (strcmp(argv[2], "alaw"))
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43 goto usage;
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44 use_alaw = 1;
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45 tone_type_sought = atoi(argv[3]);
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46 break;
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47 default:
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48 usage:
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49 fprintf(stderr,
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50 "usage: %s data-filename [alaw] tone-type-code\n",
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51 argv[0]);
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52 exit(1);
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53 }
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54 inf = fopen(data_filename, "r");
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55 if (!inf) {
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56 perror(data_filename);
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57 exit(1);
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58 }
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59 g711_dec_state = g711_init(NULL, use_alaw ? G711_ALAW : G711_ULAW);
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60 if (!g711_dec_state) {
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61 fprintf(stderr, "error: g711_init() failed!\n");
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62 exit(1);
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63 }
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64 tones_rx_state = modem_connect_tones_rx_init(NULL, tone_type_sought,
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65 report_func, NULL);
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66 if (!tones_rx_state) {
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67 fprintf(stderr,
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68 "error: modem_connect_tones_rx_init() failed!\n");
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69 exit(1);
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70 }
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71 for (frame_count = 0; ; frame_count++) {
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72 cc = fread(g711_buf, 1, FRAME_20MS, inf);
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73 if (cc == 0)
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74 break;
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75 g711_decode(g711_dec_state, linear, g711_buf, cc);
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76 modem_connect_tones_rx(tones_rx_state, linear, cc);
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77 }
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78 exit(0);
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79 }