FreeCalypso > hg > gsm-codec-lib

annotate efrtest/cod-parse.c @ 183:452c1d5a6268

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libgsmefr BFI w/o data: emit zero output after decoder reset In real-life usage, each EFR decoder session will most likely begin with lots of BFI frames before the first real frame arrives. However, because the spec-defined home state of the decoder is speech rather than CN, our regular logic for BFI w/o data would have to feed pseudorandom noise to the decoder (in the "fixed codebook excitation pulses" part), which is silly to do at the beginning of the decoder session right out of reset. Therefore, let's check reset_flag_old, and if we are still in the reset state, simply emit zero output.
author Mychaela Falconia <falcon@freecalypso.org>
date Tue, 03 Jan 2023 00:12:18 +0000
parents bbe5669f0f29
children 46a6e6b6841a
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1 /*
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2 * This program reads an EFR *.cod file in ETSI test sequence format
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3 * (output from either ETSI's official coder program or our gsmefr-etsi-enc)
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4 * and converts it into human-readable format, similar to what one would get
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5 * from our gsmrec-dump utility.
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6 */
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7
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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 <string.h>
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12 #include <strings.h>
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13 #include "../libgsmefr/gsm_efr.h"
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14 #include "etsi.h"
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15
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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 char *infname;
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20 FILE *inf;
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21 int big_endian;
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22 unsigned frame_no;
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23 uint8_t input_bits[ETSI_ENC_NWORDS], frame[EFR_RTP_FRAME_LEN];
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24 int16_t params[EFR_NUM_PARAMS];
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25 int rc, i, j, n;
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26
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27 if (argc == 2 && argv[1][0] != '-') {
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28 big_endian = 0;
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29 infname = argv[1];
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30 } else if (argc == 3 && !strcmp(argv[1], "-b")) {
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31 big_endian = 1;
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32 infname = argv[2];
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33 } else {
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34 fprintf(stderr, "usage: %s [-b] file.cod\n", argv[0]);
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35 exit(1);
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36 }
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37 inf = fopen(infname, "r");
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38 if (!inf) {
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39 perror(infname);
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40 exit(1);
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41 }
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42 for (frame_no = 0; ; frame_no++) {
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43 rc = read_etsi_bits(inf, big_endian, input_bits,
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44 ETSI_ENC_NWORDS, infname);
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45 if (!rc)
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46 break;
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47 bits2frame(input_bits, frame, infname, frame_no);
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48 printf("#%u: VAD=%u SP=%u SID=%d LPC", frame_no,
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49 input_bits[244], input_bits[245],
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50 EFR_sid_classify(frame));
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51 EFR_frame2params(frame, params);
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52 n = 0;
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53 for (i = 0; i < 5; i++)
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54 printf(" %d", params[n++]);
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55 putchar('\n');
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56 for (i = 0; i < 4; i++) {
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57 putchar(' ');
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58 for (j = 0; j < 13; j++)
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59 printf(" %d", params[n++]);
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60 putchar('\n');
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61 }
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62 }
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63 }