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annotate amrtest/decode-r.c @ 481:cc0c244bd233

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doc/AMR-library-tests: new article
author Mychaela Falconia <falcon@freecalypso.org>
date Mon, 20 May 2024 01:02:37 +0000
parents e2f824ffd08a
children
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1 /*
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2 * twamr-decode-r is a speech decoder utility going from *.amr input
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3 * to "robe" (raw BE) output.
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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 <string.h>
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10 #include <strings.h>
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11 #include "../libtwamr/tw_amr.h"
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12 #include "../libtest/robewrite.h"
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14 main(argc, argv)
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15 char **argv;
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16 {
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17 FILE *inf, *outf;
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18 uint8_t frm_in[AMR_IETF_MAX_PL];
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19 struct amr_decoder_state *state;
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20 struct amr_param_frame frame;
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21 int16_t pcm[160];
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22 int rc;
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24 if (argc != 3) {
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25 fprintf(stderr, "usage: %s input.amr output.robe\n", argv[0]);
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26 exit(1);
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27 }
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28 inf = fopen(argv[1], "r");
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29 if (!inf) {
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30 perror(argv[1]);
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31 exit(1);
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32 }
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33 if (fread(frm_in, 1, AMR_IETF_HDR_LEN, inf) != AMR_IETF_HDR_LEN ||
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34 bcmp(frm_in, amr_file_header_magic, AMR_IETF_HDR_LEN)) {
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35 fprintf(stderr, "error: %s is not in IETF AMR format\n",
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36 argv[1]);
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37 exit(1);
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38 }
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39 outf = fopen(argv[2], "w");
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40 if (!outf) {
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41 perror(argv[2]);
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42 exit(1);
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43 }
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44 state = amr_decoder_create();
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45 if (!state) {
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46 perror("amr_decoder_create()");
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47 exit(1);
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48 }
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49 for (;;) {
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50 rc = getc(inf);
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51 if (rc < 0)
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52 break;
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53 frm_in[0] = rc;
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54 rc = amr_ietf_grok_first_octet(frm_in[0]);
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55 if (rc < 0) {
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56 inv: fprintf(stderr, "error: %s contains invalid AMR data\n",
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57 argv[1]);
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58 exit(1);
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59 }
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60 if (rc && fread(frm_in+1, 1, rc, inf) != rc)
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61 goto inv;
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62 amr_frame_from_ietf(frm_in, &frame);
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63 amr_decode_frame(state, &frame, pcm);
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64 write_pcm_to_robe(outf, pcm);
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65 }
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66 fclose(outf);
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67 exit(0);
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68 }