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annotate efrtest/decode-tw5.c @ 550:de333989a12b

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document gsm[e]fr-decode-tw5[-r] utilities
author Mychaela Falconia <falcon@freecalypso.org>
date Sat, 05 Oct 2024 02:16:48 +0000
parents f9535c1fbf70
children
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1 /*
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2 * This file is the main module for gsmefr-decode-tw5 utility. It is just
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3 * like the original gsmefr-decode, but reads the GSM-EFR speech recording
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4 * from TW-TS-005 Annex A hexadecimal format instead of the old gsmx
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5 * binary format.
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6 */
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8 #include <stdio.h>
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9 #include <stdint.h>
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10 #include <stdlib.h>
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11 #include "../libgsmefr/gsm_efr.h"
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12 #include "../libtest/tw5reader.h"
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13 #include "../libtest/wavwriter.h"
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14 #include "../libtest/pcmwrite.h"
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16 main(argc, argv)
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17 char **argv;
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18 {
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19 FILE *hexf;
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20 void *wav;
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21 unsigned lineno;
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22 struct EFR_decoder_state *state;
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23 uint8_t frame[TWTS005_MAX_FRAME];
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24 unsigned frame_len;
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25 int16_t pcm[160];
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26 int rc;
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28 if (argc != 3) {
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29 fprintf(stderr, "usage: %s input.hex output.wav\n", argv[0]);
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30 exit(1);
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31 }
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32 hexf = fopen(argv[1], "r");
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33 if (!hexf) {
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34 perror(argv[1]);
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35 exit(1);
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36 }
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37 lineno = 0;
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38 wav = wav_write_open(argv[2], 8000, 16, 1);
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39 if (!wav) {
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40 perror(argv[2]);
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41 exit(1);
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42 }
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43 state = EFR_decoder_create();
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44 if (!state) {
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45 perror("EFR_decoder_create()");
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46 exit(1);
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47 }
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48 for (;;) {
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49 rc = twts005_read_frame(hexf, &lineno, frame, &frame_len);
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50 if (rc < 0) {
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51 fprintf(stderr, "%s line %u: not valid TW-TS-005\n",
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52 argv[1], lineno);
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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 rc = EFR_decode_rtp(state, frame, frame_len, pcm);
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58 if (rc < 0) {
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59 fprintf(stderr,
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60 "%s line %u: not a valid GSM-EFR frame\n",
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61 argv[1], lineno);
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62 exit(1);
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63 }
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64 write_pcm_to_wav(wav, pcm);
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65 }
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66 wav_write_close(wav);
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67 exit(0);
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68 }