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comparison dev/gsm0611-silence-fr.c @ 276:e4ca04586118

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dev/gsm0611-silence-fr: rework to eliminate libgsm dependency
author Mychaela Falconia <falcon@freecalypso.org>
date Sun, 14 Apr 2024 03:38:09 +0000
parents 61cb83bd11ec
children
comparison
equal deleted inserted replaced
275:5fbb323b2978 276:e4ca04586118
1 /* 1 /*
2 * This program is meant to be run only once by the developer - it uses 2 * This program is meant to be run only once by the developer - it uses
3 * libgsm function gsm_implode() to transform the idle frame of GSM 06.11 3 * libgsm function gsm_implode() to transform the idle frame of GSM 06.11
4 * (3GPP TS 46.011) from the table format given in the spec into 4 * (3GPP TS 46.011) from the table format given in the spec into
5 * libgsm/RTP format. 5 * libgsm/RTP format.
6 *
7 * Later update: this program has been reworked to use the local function
8 * in pack_gsmfr_rtp.c instead of gsm_implode(), in order to eliminate
9 * all build dependencies on old libgsm.
6 */ 10 */
7 11
8 #include <stdio.h> 12 #include <stdio.h>
13 #include <stdint.h>
9 #include <stdlib.h> 14 #include <stdlib.h>
10 #include <string.h> 15 #include <string.h>
11 #include <strings.h> 16 #include <strings.h>
12 #include <gsm.h>
13 17
14 static const gsm_signal lar_params[8] = {42, 39, 21, 10, 9, 4, 3, 2}; 18 extern void gsmfr_pack_to_rtp(const int16_t *params, uint8_t *frame);
15 static const gsm_signal subframe_params[17] = 19
20 static const int16_t lar_params[8] = {42, 39, 21, 10, 9, 4, 3, 2};
21 static const int16_t subframe_params[17] =
16 {40, 0, 1, 0, 3, 4, 3, 4, 4, 3, 3, 3, 3, 4, 4, 3, 3}; 22 {40, 0, 1, 0, 3, 4, 3, 4, 4, 3, 3, 3, 3, 4, 4, 3, 3};
17 23
18 main(argc, argv) 24 main(argc, argv)
19 char **argv; 25 char **argv;
20 { 26 {
21 gsm state; 27 int16_t params[76];
22 gsm_signal params[76]; 28 uint8_t frame[33];
23 gsm_byte frame[33];
24 unsigned n; 29 unsigned n;
25 30
26 /* gsm_implode() requires dummy state */
27 state = gsm_create();
28 if (!state) {
29 fprintf(stderr, "gsm_create() failed!\n");
30 exit(1);
31 }
32 /* gather params */ 31 /* gather params */
33 bcopy(lar_params, params, sizeof(gsm_signal) * 8); 32 bcopy(lar_params, params, sizeof(int16_t) * 8);
34 bcopy(subframe_params, params + 8, sizeof(gsm_signal) * 17); 33 bcopy(subframe_params, params + 8, sizeof(int16_t) * 17);
35 bcopy(subframe_params, params + 25, sizeof(gsm_signal) * 17); 34 bcopy(subframe_params, params + 25, sizeof(int16_t) * 17);
36 bcopy(subframe_params, params + 42, sizeof(gsm_signal) * 17); 35 bcopy(subframe_params, params + 42, sizeof(int16_t) * 17);
37 bcopy(subframe_params, params + 59, sizeof(gsm_signal) * 17); 36 bcopy(subframe_params, params + 59, sizeof(int16_t) * 17);
38 /* generate frame */ 37 /* generate frame */
39 gsm_implode(state, params, frame); 38 gsmfr_pack_to_rtp(params, frame);
40 /* print the frame */ 39 /* print the frame */
41 for (n = 0; n < 33; n++) { 40 for (n = 0; n < 33; n++) {
42 printf("0x%02X,", frame[n]); 41 printf("0x%02X,", frame[n]);
43 if (n == 4 || n == 11 || n == 18 || n == 25 || n == 32) 42 if (n == 4 || n == 11 || n == 18 || n == 25 || n == 32)
44 putchar('\n'); 43 putchar('\n');