FreeCalypso > hg > vband-misc

annotate efr-sid/mk-sid-test.c @ 50:0db059f4632d

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efr-sid OS#6538: more sensible 2-bit errors
author Mychaela Falconia <falcon@freecalypso.org>
date Mon, 12 Aug 2024 02:49:28 +0000
parents 8bfc517fda3b
children
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Mychaela Falconia <falcon@freecalypso.org>
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1 /*
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Mychaela Falconia <falcon@freecalypso.org>
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2 * This program generates a sequence of 95 EFR codec frames that starts
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3 * with a perfect SID and is degraded by one bit in the SID field
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4 * on every output frame.
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5 */
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6
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7 #include <stdio.h>
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8 #include <stdint.h>
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9 #include <stdlib.h>
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Mychaela Falconia <falcon@freecalypso.org>
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10 #include <gsm_efr.h>
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11 #include "etsi.h"
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12
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13 extern const uint8_t SID_codeword_bit_idx[95];
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14
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15 static void
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16 read_input_file(filename, cod_frame)
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17 char *filename;
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18 uint8_t *cod_frame;
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19 {
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20 FILE *inf;
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21
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22 inf = fopen(filename, "r");
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23 if (!inf) {
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24 perror(filename);
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25 exit(1);
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26 }
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27 read_etsi_bits(inf, 0, cod_frame, ETSI_ENC_NWORDS, filename);
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28 fclose(inf);
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29 }
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30
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31 main(argc, argv)
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32 char **argv;
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33 {
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34 uint8_t cod_frame[ETSI_ENC_NWORDS], packed_frame[EFR_RTP_FRAME_LEN];
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35 FILE *outf;
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36 unsigned nf;
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37
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38 if (argc != 3) {
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39 fprintf(stderr, "usage: %s input.cod output.gsmx\n", argv[0]);
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40 exit(1);
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41 }
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42 read_input_file(argv[1], cod_frame);
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43 outf = fopen(argv[2], "w");
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44 if (!outf) {
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45 perror(argv[2]);
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46 exit(1);
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47 }
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48 for (nf = 0; nf < 95; nf++) {
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49 bits2frame(cod_frame, packed_frame, argv[1], 0);
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50 fwrite(packed_frame, 1, EFR_RTP_FRAME_LEN, outf);
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51 cod_frame[SID_codeword_bit_idx[nf]] = 0;
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52 }
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53 fclose(outf);
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54 exit(0);
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55 }