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comparison miscutil/gsmx-to-tw5a.c @ 520:785b302992f0

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miscutil: new program gsmx-to-tw5a
author Mychaela Falconia <falcon@freecalypso.org>
date Thu, 19 Sep 2024 01:06:58 +0000
parents miscutil/gsmrec-dump.c@b5f8ea41362b
children 68fe269b4316
comparison
equal deleted inserted replaced
519:6f8abfe253a4 520:785b302992f0
1 /*
2 * This program converts FR/EFR speech recordings from gsmx binary format
3 * into more formally standardized TW-TS-005 Annex A format.
4 *
5 * FR and EFR frames are written in basic format (no TEH);
6 * BFI marker records are converted into TW-TS-001 No_Data frames.
7 */
8
9 #include <stdio.h>
10 #include <stdint.h>
11 #include <stdlib.h>
12 #include <string.h>
13 #include <strings.h>
14 #include "../libgsmfr2/tw_gsmfr.h"
15 #include "../libgsmefr/gsm_efr.h"
16 #include "../libtest/binreader.h"
17
18 static void
19 emit_hex_frame(frame, nbytes)
20 uint8_t *frame;
21 unsigned nbytes;
22 {
23 unsigned n;
24
25 for (n = 0; n < nbytes; n++)
26 printf("%02X", frame[n]);
27 putchar('\n');
28 }
29
30 main(argc, argv)
31 char **argv;
32 {
33 FILE *binf, *outf;
34 unsigned frame_index;
35 uint8_t frame[BINFILE_MAX_FRAME];
36 int rc;
37
38 if (argc != 3) {
39 fprintf(stderr, "usage: %s input.gsmx output.hex\n", argv[0]);
40 exit(1);
41 }
42 binf = fopen(argv[1], "r");
43 if (!binf) {
44 perror(argv[1]);
45 exit(1);
46 }
47 if (strcmp(argv[2], "-")) {
48 outf = fopen(argv[2], "w");
49 if (!outf) {
50 perror(argv[2]);
51 exit(1);
52 }
53 } else
54 outf = stdout;
55 for (frame_index = 0; ; frame_index++) {
56 rc = binfile_read_frame(binf, frame);
57 if (rc < 0) {
58 fprintf(stderr,
59 "error: garbage in %s after %u frames\n",
60 argv[1], frame_index);
61 exit(1);
62 }
63 if (!rc)
64 break;
65 switch (frame[0] & 0xF0) {
66 case 0xB0:
67 printf("%02X\n", 0xE6 | frame[1] & 1);
68 break;
69 case 0xC0:
70 emit_hex_frame(frame, EFR_RTP_FRAME_LEN);
71 break;
72 case 0xD0:
73 emit_hex_frame(frame, GSMFR_RTP_FRAME_LEN);
74 break;
75 }
76 }
77 exit(0);
78 }