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annotate miscutil/gsmrec-dump.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 a5ffec18e4cd
children 3816ba89a5a0
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1 /*
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2 * This program reads a binary file in our extended-libgsm format
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3 * and dumps all frames in human-readable form.
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4 */
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5
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6 #include <stdio.h>
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7 #include <stdint.h>
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8 #include <stdlib.h>
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9 #include <gsm.h>
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10 #include "../libgsmefr/gsm_efr.h"
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11 #include "../libtest/binreader.h"
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12
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13 main(argc, argv)
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14 char **argv;
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15 {
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16 FILE *binf;
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17 gsm dummy_state;
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18 unsigned frame_index;
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19 uint8_t frame[BINFILE_MAX_FRAME];
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20 gsm_signal params[76];
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21 int rc, i, j, n;
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22
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23 if (argc != 2) {
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24 fprintf(stderr, "usage: %s bin-stream-file\n", argv[0]);
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25 exit(1);
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26 }
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27 binf = fopen(argv[1], "r");
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28 if (!binf) {
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29 perror(argv[1]);
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30 exit(1);
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31 }
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32 dummy_state = gsm_create();
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33 if (!dummy_state) {
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34 fprintf(stderr, "gsm_create() failed!\n");
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35 exit(1);
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36 }
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37 for (frame_index = 0; ; frame_index++) {
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38 rc = binfile_read_frame(binf, frame);
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39 if (rc < 0) {
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40 fprintf(stderr, "error: garbage in %s\n", argv[1]);
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41 exit(1);
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42 }
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43 if (!rc)
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44 break;
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45 printf("#%u: ", frame_index);
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46 switch (frame[0] & 0xF0) {
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47 case 0xB0:
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48 printf("BFI TAF=%u\n", frame[1] & 1);
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49 break;
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50 case 0xC0:
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51 printf("EFR SID=%d LPC", EFR_sid_classify(frame));
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52 EFR_frame2params(frame, params);
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53 n = 0;
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54 for (i = 0; i < 5; i++)
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55 printf(" %d", params[n++]);
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56 putchar('\n');
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57 for (i = 0; i < 4; i++) {
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58 putchar(' ');
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59 for (j = 0; j < 13; j++)
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60 printf(" %d", params[n++]);
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61 putchar('\n');
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62 }
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63 break;
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64 case 0xD0:
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65 fputs("FR", stdout);
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66 gsm_explode(dummy_state, frame, params);
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67 n = 0;
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68 for (i = 0; i < 8; i++)
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69 printf(" %d", params[n++]);
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70 putchar('\n');
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71 for (i = 0; i < 4; i++) {
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72 putchar(' ');
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73 for (j = 0; j < 17; j++)
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74 printf(" %d", params[n++]);
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75 putchar('\n');
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76 }
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77 break;
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78 }
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79 }
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80 exit(0);
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81 }