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annotate hrutil/decode.c @ 607:cdf3f5c618b8

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hrutil: new program gsmhr-decode
author Mychaela Falconia <falcon@freecalypso.org>
date Fri, 05 Dec 2025 02:43:19 +0000
parents frtest/decode-tw5.c@f9eefb61fb2f
children
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1 /*
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2 * This file is the main module for gsmhr-decode utility. This utility
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3 * is intended to serve as the "user-friendly" decoder for GSM-HR encoded
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4 * speech, reading TW-TS-005 Annex B as input and emitting playable WAV
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5 * as output.
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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 "../libgsmhr1/tw_gsmhr.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 gsmhr_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 params[GSMHR_NUM_PARAMS_DEC];
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26 int16_t pcm[160];
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27 int rc;
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29 if (argc != 3) {
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30 fprintf(stderr, "usage: %s input.hex output.wav\n", argv[0]);
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31 exit(1);
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32 }
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33 hexf = fopen(argv[1], "r");
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34 if (!hexf) {
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35 perror(argv[1]);
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36 exit(1);
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37 }
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38 lineno = 0;
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39 wav = wav_write_open(argv[2], 8000, 16, 1);
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40 if (!wav) {
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41 perror(argv[2]);
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42 exit(1);
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43 }
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44 state = gsmhr_decoder_create();
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45 if (!state) {
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46 fprintf(stderr, "gsmhr_decoder_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 = twts005_read_frame(hexf, &lineno, frame, &frame_len);
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51 if (rc < 0) {
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52 fprintf(stderr, "%s line %u: not valid TW-TS-005\n",
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53 argv[1], lineno);
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54 exit(1);
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55 }
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56 if (!rc)
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57 break;
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58 rc = gsmhr_rtp_in_direct(frame, frame_len, params);
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59 if (rc < 0) {
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60 fprintf(stderr,
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61 "%s line %u: not a valid GSM-HR frame\n",
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62 argv[1], lineno);
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63 exit(1);
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64 }
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65 gsmhr_decode_frame(state, params, pcm);
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66 write_pcm_to_wav(wav, pcm);
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67 }
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68 wav_write_close(wav);
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69 exit(0);
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70 }