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comparison 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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606:bc57dcfa91d0 607:cdf3f5c618b8
1 /*
2 * This file is the main module for gsmhr-decode utility. This utility
3 * is intended to serve as the "user-friendly" decoder for GSM-HR encoded
4 * speech, reading TW-TS-005 Annex B as input and emitting playable WAV
5 * as output.
6 */
7
8 #include <stdio.h>
9 #include <stdint.h>
10 #include <stdlib.h>
11 #include "../libgsmhr1/tw_gsmhr.h"
12 #include "../libtest/tw5reader.h"
13 #include "../libtest/wavwriter.h"
14 #include "../libtest/pcmwrite.h"
15
16 main(argc, argv)
17 char **argv;
18 {
19 FILE *hexf;
20 void *wav;
21 unsigned lineno;
22 struct gsmhr_decoder_state *state;
23 uint8_t frame[TWTS005_MAX_FRAME];
24 unsigned frame_len;
25 int16_t params[GSMHR_NUM_PARAMS_DEC];
26 int16_t pcm[160];
27 int rc;
28
29 if (argc != 3) {
30 fprintf(stderr, "usage: %s input.hex output.wav\n", argv[0]);
31 exit(1);
32 }
33 hexf = fopen(argv[1], "r");
34 if (!hexf) {
35 perror(argv[1]);
36 exit(1);
37 }
38 lineno = 0;
39 wav = wav_write_open(argv[2], 8000, 16, 1);
40 if (!wav) {
41 perror(argv[2]);
42 exit(1);
43 }
44 state = gsmhr_decoder_create();
45 if (!state) {
46 fprintf(stderr, "gsmhr_decoder_create() failed!\n");
47 exit(1);
48 }
49 for (;;) {
50 rc = twts005_read_frame(hexf, &lineno, frame, &frame_len);
51 if (rc < 0) {
52 fprintf(stderr, "%s line %u: not valid TW-TS-005\n",
53 argv[1], lineno);
54 exit(1);
55 }
56 if (!rc)
57 break;
58 rc = gsmhr_rtp_in_direct(frame, frame_len, params);
59 if (rc < 0) {
60 fprintf(stderr,
61 "%s line %u: not a valid GSM-HR frame\n",
62 argv[1], lineno);
63 exit(1);
64 }
65 gsmhr_decode_frame(state, params, pcm);
66 write_pcm_to_wav(wav, pcm);
67 }
68 wav_write_close(wav);
69 exit(0);
70 }