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annotate pcma2efr/gen-amr-2fr.c @ 34:307fe06fabec

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dhf: generate EFR hex DHF in C form
author Mychaela Falconia <falcon@freecalypso.org>
date Tue, 14 May 2024 03:36:31 +0000
parents 4f47447fd17f
children
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1 /*
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2 * The code in this module takes linear_input_array[] from gen160.c
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3 * and generates EFR-format frames by way of libtwamr encoder.
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4 * This version does a second frame pass on offsets 120-159.
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5 */
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6
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7 #include <stdio.h>
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8 #include <stdint.h>
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9 #include <stdlib.h>
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10 #include <string.h>
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11 #include <strings.h>
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12 #include <gsm_efr.h>
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13 #include <tw_amr.h>
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15 extern uint16_t linear_input_array[480];
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16
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17 uint8_t amr_efr[160][31];
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19 void
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20 generate_amr_efr(void)
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21 {
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22 struct amr_encoder_state *st;
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23 struct amr_param_frame amr_frame;
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24 unsigned m;
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25
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26 st = amr_encoder_create(0, 0);
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27 if (!st) {
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28 fprintf(stderr, "error: amr_encoder_create() failed\n");
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29 exit(1);
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30 }
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31 for (m = 0; m < 160; m++) {
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32 amr_encoder_reset(st, 0, 0);
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33 amr_encode_frame(st, MR122,
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34 (const int16_t *) linear_input_array + 160 - m,
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35 &amr_frame);
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36 if (m >= 120) {
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37 if (bcmp(amr_frame.param, amr_dhf_mr122,
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38 EFR_NUM_PARAMS * sizeof(int16_t))) {
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39 fprintf(stderr,
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40 "MR122 DHF check failed on AMR-EFR first frame #%u\n",
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41 m);
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42 exit(1);
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43 }
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44 amr_encode_frame(st, MR122,
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45 (const int16_t *) linear_input_array + 320 - m,
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46 &amr_frame);
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47 }
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48 EFR_params2frame(amr_frame.param, amr_efr[m]);
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49 }
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50 free(st);
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51 }