FreeCalypso > hg > gsm-codec-lib

annotate frtest/decode.c @ 282:9ee8ad3d4d30

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frtest: rm gsmfr-hand-test and gsmfr-max-out utils These hack programs were never properly documented and were written only as part of a debug chase, in pursuit of a bug that ultimately turned out to be in our then-hacky patch to osmo-bts-sysmo, before beginning of proper patches in Osmocom. These hack programs need to be dropped from the present sw package because they depend on old libgsm, and we are eliminating that dependency.
author Mychaela Falconia <falcon@freecalypso.org>
date Sun, 14 Apr 2024 05:44:47 +0000
parents b9a842775f40
children 8d3cfa65a6c2
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1 /*
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2 * This file is the main module for gsmfr-decode utility.
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3 */
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4
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5 #include <stdio.h>
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6 #include <stdint.h>
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7 #include <stdlib.h>
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8 #include <gsm.h>
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9 #include "../libgsmfrp/gsm_fr_preproc.h"
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10 #include "../libtest/binreader.h"
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11 #include "../libtest/wavwriter.h"
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12 #include "../libtest/pcmwrite.h"
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13
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14 main(argc, argv)
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15 char **argv;
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16 {
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17 FILE *binf;
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18 void *wav;
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19 gsm dec_state;
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20 struct gsmfr_preproc_state *pp_state;
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21 uint8_t frame[BINFILE_MAX_FRAME];
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22 int16_t pcm[160];
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23 int rc, bfi, taf;
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24
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25 if (argc != 3) {
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26 fprintf(stderr, "usage: %s input.gsm output.wav\n", argv[0]);
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27 exit(1);
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28 }
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29 binf = fopen(argv[1], "r");
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30 if (!binf) {
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31 perror(argv[1]);
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32 exit(1);
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33 }
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34 wav = wav_write_open(argv[2], 8000, 16, 1);
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35 if (!wav) {
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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 dec_state = gsm_create();
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40 if (!dec_state) {
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41 fprintf(stderr, "gsm_create() failed!\n");
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42 exit(1);
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43 }
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44 pp_state = gsmfr_preproc_create();
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45 if (!pp_state) {
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46 fprintf(stderr, "gsmfr_preproc_create() failed!\n");
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47 exit(1);
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48 }
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49 for (;;) {
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50 rc = binfile_read_frame(binf, frame);
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51 if (rc < 0) {
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52 fprintf(stderr, "error: garbage in %s\n", argv[1]);
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53 exit(1);
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54 }
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55 if (!rc)
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56 break;
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57 if (frame[0] == 0xBF) {
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58 bfi = 1;
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59 taf = frame[1] & 1;
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60 } else if ((frame[0] & 0xF0) == 0xD0)
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61 bfi = 0;
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62 else {
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63 fprintf(stderr, "error: %s is not in FR codec format\n",
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64 argv[1]);
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65 exit(1);
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66 }
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67 if (bfi)
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68 gsmfr_preproc_bfi(pp_state, taf, frame);
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69 else
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70 gsmfr_preproc_good_frame(pp_state, frame);
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71 gsm_decode(dec_state, frame, pcm);
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72 write_pcm_to_wav(wav, pcm);
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73 }
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74 wav_write_close(wav);
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75 exit(0);
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76 }