FreeCalypso > hg > gsm-codec-lib

annotate efrtest/etsi-dec.c @ 145:8ed838709897

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efrtest: ETSI bit reading factored out of gsmefr-etsi-dec
author Mychaela Falconia <falcon@freecalypso.org>
date Wed, 14 Dec 2022 08:02:00 +0000
parents e5ee684c6d29
children da17c7f02c6c
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9cf1355bc071 gsmefr-etsi-dec test program written
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1 /*
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2 * gsmefr-etsi-dec is a test program for our EFR decoder: it reads ETSI's
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3 * .dec format as input and writes raw 16-bit PCM (same as ETSI's *.out)
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4 * as output, allowing our decoder to be tested with ETSI's official test
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5 * sequences.
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6 *
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7 * ETSI input and output files are read and written in LE byte order,
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8 * matching the official test sequences in ts_100725v050200p0.zip.
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9 */
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10
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11 #include <stdio.h>
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12 #include <stdint.h>
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13 #include <stdlib.h>
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14 #include <string.h>
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15 #include <strings.h>
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16 #include "../libgsmefr/gsm_efr.h"
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17 #include "etsi.h"
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18
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19 static void
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20 write_pcm_le(outf, pcm)
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21 FILE *outf;
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22 int16_t *pcm;
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23 {
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24 uint8_t bytes[320], *dp;
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25 int16_t samp;
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26 unsigned n;
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27
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28 dp = bytes;
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29 for (n = 0; n < 160; n++) {
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30 samp = pcm[n];
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31 *dp++ = samp & 0xFF;
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32 *dp++ = (samp >> 8) & 0xFF;
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33 }
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34 fwrite(bytes, 2, 160, outf);
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35 }
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36
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37 main(argc, argv)
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38 char **argv;
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39 {
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40 FILE *inf, *outf;
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41 struct EFR_decoder_state *state;
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42 unsigned frame_no;
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43 uint8_t input_bits[ETSI_DEC_NWORDS], frame[EFR_RTP_FRAME_LEN];
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44 int16_t pcm[160];
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45 int rc;
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46
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47 if (argc != 3) {
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48 fprintf(stderr, "usage: %s input.dec output.out\n", argv[0]);
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49 exit(1);
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50 }
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51 inf = fopen(argv[1], "r");
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52 if (!inf) {
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53 perror(argv[1]);
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54 exit(1);
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55 }
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56 outf = fopen(argv[2], "w");
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57 if (!outf) {
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58 perror(argv[2]);
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59 exit(1);
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60 }
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61 state = EFR_decoder_create();
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62 if (!state) {
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63 perror("EFR_decoder_create()");
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64 exit(1);
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65 }
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66 for (frame_no = 0; ; frame_no++) {
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67 rc = read_etsi_bits(inf, 0, input_bits, ETSI_DEC_NWORDS,
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68 argv[1]);
96
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69 if (!rc)
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70 break;
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71 if (input_bits[0] > 1) {
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72 fprintf(stderr, "error in %s frame #%u: BFI > 1\n",
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73 argv[1], frame_no);
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74 exit(1);
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75 }
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76 bits2frame(input_bits + 1, frame, argv[1], frame_no);
96
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77 if (input_bits[245] > 2) {
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78 fprintf(stderr, "error in %s frame #%u: SID > 2\n",
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79 argv[1], frame_no);
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80 exit(1);
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81 }
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82 if (input_bits[246] > 1) {
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83 fprintf(stderr, "error in %s frame #%u: TAF > 1\n",
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84 argv[1], frame_no);
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85 exit(1);
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86 }
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87 rc = EFR_sid_classify(frame);
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88 if (input_bits[245] != rc) {
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89 fprintf(stderr,
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90 "warning: frame #%u has mismatching SID (file says %u, analysis yields %d)\n",
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91 frame_no, input_bits[245], rc);
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92 }
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93 EFR_decode_frame(state, frame, input_bits[0], input_bits[246],
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94 pcm);
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95 write_pcm_le(outf, pcm);
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96 }
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97 fclose(outf);
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98 exit(0);
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99 }