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comparison efr-sid/mk-sid-test.c @ 43:8bfc517fda3b

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efr-sid: hack created
author Mychaela Falconia <falcon@freecalypso.org>
date Sun, 09 Jun 2024 05:57:48 +0000
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42:982169986a14 43:8bfc517fda3b
1 /*
2 * This program generates a sequence of 95 EFR codec frames that starts
3 * with a perfect SID and is degraded by one bit in the SID field
4 * on every output frame.
5 */
6
7 #include <stdio.h>
8 #include <stdint.h>
9 #include <stdlib.h>
10 #include <gsm_efr.h>
11 #include "etsi.h"
12
13 extern const uint8_t SID_codeword_bit_idx[95];
14
15 static void
16 read_input_file(filename, cod_frame)
17 char *filename;
18 uint8_t *cod_frame;
19 {
20 FILE *inf;
21
22 inf = fopen(filename, "r");
23 if (!inf) {
24 perror(filename);
25 exit(1);
26 }
27 read_etsi_bits(inf, 0, cod_frame, ETSI_ENC_NWORDS, filename);
28 fclose(inf);
29 }
30
31 main(argc, argv)
32 char **argv;
33 {
34 uint8_t cod_frame[ETSI_ENC_NWORDS], packed_frame[EFR_RTP_FRAME_LEN];
35 FILE *outf;
36 unsigned nf;
37
38 if (argc != 3) {
39 fprintf(stderr, "usage: %s input.cod output.gsmx\n", argv[0]);
40 exit(1);
41 }
42 read_input_file(argv[1], cod_frame);
43 outf = fopen(argv[2], "w");
44 if (!outf) {
45 perror(argv[2]);
46 exit(1);
47 }
48 for (nf = 0; nf < 95; nf++) {
49 bits2frame(cod_frame, packed_frame, argv[1], 0);
50 fwrite(packed_frame, 1, EFR_RTP_FRAME_LEN, outf);
51 cod_frame[SID_codeword_bit_idx[nf]] = 0;
52 }
53 fclose(outf);
54 exit(0);
55 }