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comparison miscutil/tw5a-to-gsmx.c @ 524:ddb2b00d582b

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miscutil: new program tw5a-to-gsmx
author Mychaela Falconia <falcon@freecalypso.org>
date Thu, 19 Sep 2024 05:02:45 +0000
parents miscutil/tw5a-dump.c@86d4ec69b36c
children
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523:86d4ec69b36c 524:ddb2b00d582b
1 /*
2 * This program converts FR/EFR speech recordings from TW-TS-005 Annex A
3 * hexadecimal format into our older gsmx binary format.
4 */
5
6 #include <stdio.h>
7 #include <stdint.h>
8 #include <stdlib.h>
9 #include <string.h>
10 #include <strings.h>
11 #include "../libgsmfr2/tw_gsmfr.h"
12 #include "../libgsmefr/gsm_efr.h"
13 #include "../libtest/tw5reader.h"
14
15 main(argc, argv)
16 char **argv;
17 {
18 FILE *hexf, *outf;
19 unsigned lineno;
20 uint8_t frame[TWTS005_MAX_FRAME];
21 unsigned frame_len;
22 int rc;
23
24 if (argc != 3) {
25 fprintf(stderr, "usage: %s input.hex output.gsmx\n", argv[0]);
26 exit(1);
27 }
28 hexf = fopen(argv[1], "r");
29 if (!hexf) {
30 perror(argv[1]);
31 exit(1);
32 }
33 lineno = 0;
34 outf = fopen(argv[2], "w");
35 if (!outf) {
36 perror(argv[2]);
37 exit(1);
38 }
39 for (;;) {
40 rc = twts005_read_frame(hexf, &lineno, frame, &frame_len);
41 if (rc < 0) {
42 fprintf(stderr, "%s line %u: not valid TW-TS-005\n",
43 argv[1], lineno);
44 exit(1);
45 }
46 if (!rc)
47 break;
48 switch (frame_len) {
49 case 0:
50 putc(0xBF, outf);
51 putc(0, outf);
52 break;
53 case 1:
54 if ((frame[0] & 0xF6) != 0xE6)
55 goto invalid;
56 putc(0xBF, outf);
57 putc(frame[0] & 1, outf);
58 break;
59 case GSMFR_RTP_FRAME_LEN:
60 if ((frame[0] & 0xF0) != 0xD0)
61 goto invalid;
62 fwrite(frame, 1, GSMFR_RTP_FRAME_LEN, outf);
63 break;
64 case GSMFR_RTP_FRAME_LEN+1:
65 if ((frame[0] & 0xF4) != 0xE0)
66 goto invalid;
67 if ((frame[1] & 0xF0) != 0xD0)
68 goto invalid;
69 if (frame[0] & 0x02) {
70 putc(0xBF, outf);
71 putc(frame[0] & 1, outf);
72 } else
73 fwrite(frame + 1, 1, GSMFR_RTP_FRAME_LEN, outf);
74 break;
75 case EFR_RTP_FRAME_LEN:
76 if ((frame[0] & 0xF0) != 0xC0)
77 goto invalid;
78 fwrite(frame, 1, EFR_RTP_FRAME_LEN, outf);
79 break;
80 case EFR_RTP_FRAME_LEN+1:
81 if ((frame[0] & 0xF4) != 0xE0)
82 goto invalid;
83 if ((frame[1] & 0xF0) != 0xC0)
84 goto invalid;
85 if (frame[0] & 0x02) {
86 putc(0xBF, outf);
87 putc(frame[0] & 1, outf);
88 } else
89 fwrite(frame + 1, 1, EFR_RTP_FRAME_LEN, outf);
90 break;
91 default:
92 invalid:
93 fprintf(stderr,
94 "%s line %u: not a valid FR or EFR frame\n",
95 argv[1], lineno);
96 exit(1);
97 }
98 }
99 exit(0);
100 }