FreeCalypso > hg > gsm-codec-lib

annotate frtest/max-out.c @ 122:b33f2168fdec

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doc/EFR-rationale article written
author Mychaela Falconia <falcon@freecalypso.org>
date Sat, 10 Dec 2022 08:51:01 +0000
parents a8fd4ff6b013
children a5ffec18e4cd
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1 /*
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2 * This program reads an extended-libgsm binary file (which must be in FR
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3 * codec format, not EFR) and performs the following processing, in this
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4 * order:
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5 *
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6 * 1) dumps every frame in human-readable form just like gsmrec-dump;
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7 * 2) passes the frame stream through our DTX Rx preprocessor;
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8 * 3) dumps the output from the preprocessor;
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9 * 4) feeds this output to the standard 06.10 decoder (libgsm);
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10 * 5) finds the highest-magnitude PCM sample in the decoder output and
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11 * reports this maximum output magnitude.
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12 *
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13 * This program is intended to serve as a debug aid, for troubleshooting
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14 * of our libgsmfrp+libgsm stack.
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15 */
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16
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17 #include <stdio.h>
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18 #include <stdint.h>
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19 #include <stdlib.h>
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20 #include <gsm.h>
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21 #include "../libgsmfrp/gsm_fr_preproc.h"
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22 #include "../libtest/binreader.h"
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24 main(argc, argv)
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25 char **argv;
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26 {
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27 FILE *binf;
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28 gsm dec_state;
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29 struct gsmfr_preproc_state *pp_state;
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30 unsigned frame_index;
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31 uint8_t frame[BINFILE_MAX_FRAME];
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32 int16_t pcm[160];
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33 gsm_signal fr_params[76];
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34 int rc, bfi, taf;
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35 int i, j, n;
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36 unsigned samp_abs, samp_max;
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37
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38 if (argc != 2) {
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39 fprintf(stderr, "usage: %s bin-stream-file\n", argv[0]);
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40 exit(1);
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41 }
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42 binf = fopen(argv[1], "r");
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43 if (!binf) {
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44 perror(argv[1]);
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45 exit(1);
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46 }
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47 dec_state = gsm_create();
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48 if (!dec_state) {
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49 fprintf(stderr, "gsm_create() failed!\n");
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50 exit(1);
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51 }
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52 pp_state = gsmfr_preproc_create();
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53 if (!pp_state) {
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54 fprintf(stderr, "gsmfr_preproc_create() failed!\n");
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55 exit(1);
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56 }
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57 for (frame_index = 0; ; frame_index++) {
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58 rc = binfile_read_frame(binf, frame);
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59 if (rc < 0) {
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60 fprintf(stderr, "error: garbage in %s\n", argv[1]);
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61 exit(1);
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62 }
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63 if (!rc)
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64 break;
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65 printf("#%u: ", frame_index);
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66 switch (frame[0] & 0xF0) {
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67 case 0xB0:
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68 bfi = 1;
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69 taf = frame[1] & 1;
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70 printf("BFI TAF=%u\n", taf);
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71 break;
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72 case 0xD0:
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73 bfi = 0;
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74 fputs("FR", stdout);
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75 gsm_explode(dec_state, frame, fr_params);
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76 n = 0;
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77 for (i = 0; i < 8; i++)
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78 printf(" %u", fr_params[n++]);
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79 putchar('\n');
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80 for (i = 0; i < 4; i++) {
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81 putchar(' ');
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82 for (j = 0; j < 17; j++)
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83 printf(" %u", fr_params[n++]);
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84 putchar('\n');
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85 }
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86 break;
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87 default:
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88 fprintf(stderr, "error: %s is not in FR codec format\n",
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89 argv[1]);
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90 exit(1);
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91 }
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92 if (bfi)
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93 gsmfr_preproc_bfi(pp_state, taf, frame);
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94 else
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95 gsmfr_preproc_good_frame(pp_state, frame);
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96 fputs("Xform:", stdout);
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97 gsm_explode(dec_state, frame, fr_params);
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98 n = 0;
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99 for (i = 0; i < 8; i++)
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100 printf(" %u", fr_params[n++]);
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101 putchar('\n');
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102 for (i = 0; i < 4; i++) {
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103 putchar(' ');
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104 for (j = 0; j < 17; j++)
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105 printf(" %u", fr_params[n++]);
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106 putchar('\n');
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107 }
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108 gsm_decode(dec_state, frame, pcm);
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109 samp_max = 0;
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110 for (i = 0; i < 160; i++) {
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111 if (pcm[i] >= 0)
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112 samp_abs = pcm[i];
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113 else
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114 samp_abs = -pcm[i];
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115 if (samp_abs > samp_max)
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116 samp_max = samp_abs;
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117 }
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118 printf(" MAX=%u\n", samp_max);
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119 }
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120 exit(0);
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121 }