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annotate amrefr/tseq-enc.c @ 556:18aca50d68df default tip

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doc/Calypso-TCH-downlink: update for FR1 BFI-with-data
author Mychaela Falconia <falcon@freecalypso.org>
date Fri, 11 Oct 2024 01:54:00 +0000
parents 026bdc1f0dda
children
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1 /*
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2 * amrefr-tseq-enc is a test program for our libtwamr-based "alternative EFR"
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3 * encoder: it functions just like gsmefr-etsi-enc, but uses libtwamr as
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4 * the encoder engine instead of libgsmefr. Libgsmefr functions are still
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5 * used for frame packing, but not for actual encoding. Note that there is
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6 * no -d option in this version, and no DTX encoding support: a DTX-capable
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7 * AMR-EFR hybrid is a beast that is currently outside our capabilities.
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8 *
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9 * The byte order is LE by default or BE with -b option. Practical testing
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10 * will always require some manual byte-swap conversion: t??_efr.cod files
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11 * in amr122_efr.zip are shipped in BE, but the corresponding t??.inp files
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12 * in the 06.74 package are LE.
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13 */
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15 #include <stdio.h>
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16 #include <stdint.h>
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17 #include <stdlib.h>
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18 #include <string.h>
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19 #include <strings.h>
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20 #include <unistd.h>
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21 #include "../libgsmefr/gsm_efr.h"
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22 #include "../libtwamr/tw_amr.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 char *infname, *outfname;
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28 FILE *inf, *outf;
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29 struct amr_encoder_state *state;
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30 int16_t pcm[160];
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31 struct amr_param_frame amr_frame;
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32 uint8_t efr_frame[EFR_RTP_FRAME_LEN], bits[250];
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33 int opt, rc, big_endian = 0;
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34 extern int optind;
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35
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36 while ((opt = getopt(argc, argv, "b")) != EOF) {
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37 switch (opt) {
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38 case 'b':
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39 big_endian = 1;
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40 continue;
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41 default:
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42 usage:
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43 fprintf(stderr, "usage: %s [-b] input.inp output.cod\n",
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44 argv[0]);
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45 exit(1);
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46 }
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47 }
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48 if (argc != optind + 2)
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49 goto usage;
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50 infname = argv[optind];
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51 outfname = argv[optind+1];
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52
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53 inf = fopen(infname, "r");
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54 if (!inf) {
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55 perror(infname);
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56 exit(1);
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57 }
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58 outf = fopen(outfname, "w");
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59 if (!outf) {
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60 perror(outfname);
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61 exit(1);
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62 }
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63 state = amr_encoder_create(0, 0);
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64 if (!state) {
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65 perror("amr_encoder_create()");
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66 exit(1);
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67 }
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68 for (;;) {
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69 rc = read_input(inf, pcm, infname, big_endian);
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70 if (!rc)
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71 break;
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72 amr_encode_frame(state, MR122, pcm, &amr_frame);
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73 amr_dhf_subst_efr2(&amr_frame, pcm);
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74 EFR_params2frame(amr_frame.param, efr_frame);
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75 frame2bits(efr_frame, bits);
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76 bits[248] = 1;
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77 bits[249] = 1;
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78 emit_output(outf, bits + 4, 246, big_endian);
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79 }
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80 fclose(outf);
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81 exit(0);
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82 }