FreeCalypso > hg > gsm-codec-lib

annotate miscutil/tw5a-to-gsmx.c @ 534:516e84085a15

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libgsmfr2 is now at version 2.1.0
author Mychaela Falconia <falcon@freecalypso.org>
date Fri, 20 Sep 2024 00:17:35 +0000
parents ddb2b00d582b
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /*
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2 * This program converts FR/EFR speech recordings from TW-TS-005 Annex A
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3 * hexadecimal format into our older gsmx binary format.
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4 */
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5
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6 #include <stdio.h>
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7 #include <stdint.h>
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8 #include <stdlib.h>
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9 #include <string.h>
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10 #include <strings.h>
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11 #include "../libgsmfr2/tw_gsmfr.h"
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12 #include "../libgsmefr/gsm_efr.h"
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13 #include "../libtest/tw5reader.h"
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14
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15 main(argc, argv)
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16 char **argv;
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17 {
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18 FILE *hexf, *outf;
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19 unsigned lineno;
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20 uint8_t frame[TWTS005_MAX_FRAME];
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21 unsigned frame_len;
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22 int rc;
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23
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24 if (argc != 3) {
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25 fprintf(stderr, "usage: %s input.hex output.gsmx\n", argv[0]);
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26 exit(1);
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27 }
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28 hexf = fopen(argv[1], "r");
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29 if (!hexf) {
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30 perror(argv[1]);
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31 exit(1);
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32 }
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33 lineno = 0;
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34 outf = fopen(argv[2], "w");
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35 if (!outf) {
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36 perror(argv[2]);
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37 exit(1);
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38 }
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39 for (;;) {
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40 rc = twts005_read_frame(hexf, &lineno, frame, &frame_len);
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41 if (rc < 0) {
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42 fprintf(stderr, "%s line %u: not valid TW-TS-005\n",
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43 argv[1], lineno);
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44 exit(1);
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45 }
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46 if (!rc)
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47 break;
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48 switch (frame_len) {
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49 case 0:
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50 putc(0xBF, outf);
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51 putc(0, outf);
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52 break;
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53 case 1:
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54 if ((frame[0] & 0xF6) != 0xE6)
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55 goto invalid;
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56 putc(0xBF, outf);
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57 putc(frame[0] & 1, outf);
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58 break;
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59 case GSMFR_RTP_FRAME_LEN:
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60 if ((frame[0] & 0xF0) != 0xD0)
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61 goto invalid;
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62 fwrite(frame, 1, GSMFR_RTP_FRAME_LEN, outf);
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63 break;
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64 case GSMFR_RTP_FRAME_LEN+1:
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65 if ((frame[0] & 0xF4) != 0xE0)
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66 goto invalid;
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67 if ((frame[1] & 0xF0) != 0xD0)
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68 goto invalid;
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69 if (frame[0] & 0x02) {
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70 putc(0xBF, outf);
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71 putc(frame[0] & 1, outf);
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72 } else
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73 fwrite(frame + 1, 1, GSMFR_RTP_FRAME_LEN, outf);
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74 break;
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75 case EFR_RTP_FRAME_LEN:
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76 if ((frame[0] & 0xF0) != 0xC0)
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77 goto invalid;
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78 fwrite(frame, 1, EFR_RTP_FRAME_LEN, outf);
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79 break;
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80 case EFR_RTP_FRAME_LEN+1:
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81 if ((frame[0] & 0xF4) != 0xE0)
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82 goto invalid;
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83 if ((frame[1] & 0xF0) != 0xC0)
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84 goto invalid;
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85 if (frame[0] & 0x02) {
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86 putc(0xBF, outf);
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87 putc(frame[0] & 1, outf);
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88 } else
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89 fwrite(frame + 1, 1, EFR_RTP_FRAME_LEN, outf);
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90 break;
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91 default:
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92 invalid:
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93 fprintf(stderr,
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94 "%s line %u: not a valid FR or EFR frame\n",
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95 argv[1], lineno);
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96 exit(1);
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97 }
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98 }
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99 exit(0);
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100 }