FreeCalypso > hg > gsm-codec-lib

annotate miscutil/wav2raw.c @ 168:486e19acc66f

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doc/Calypso-TCH-downlink: document new utilities
author Mychaela Falconia <falcon@freecalypso.org>
date Sun, 25 Dec 2022 09:48:02 +0000
parents 578fdedf4327
children
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578fdedf4327 pcm16-wav2raw utility written
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1 /*
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2 * This program reads a 16-bit linear PCM speech recording in WAV format
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3 * and converts it to raw format, either BE or LE.
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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 "../libtest/wavreader.h"
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12 #include "../libtest/wavrdhelp.h"
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13
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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 int big_endian;
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18 void *wav;
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19 FILE *outf;
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20 int16_t pcm[160], samp;
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21 uint8_t bytes[320], *dp;
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22 int cc, rc, i;
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23
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24 if (argc != 4) {
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25 usage: fprintf(stderr, "usage: %s input.wav output.raw be|le\n",
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26 argv[0]);
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27 exit(1);
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28 }
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29 if (!strcmp(argv[3], "be"))
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30 big_endian = 1;
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31 else if (!strcmp(argv[3], "le"))
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32 big_endian = 0;
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33 else
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34 goto usage;
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35 wav = wav_read_open(argv[1]);
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36 if (!wav) {
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37 perror(argv[1]);
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38 exit(1);
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39 }
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40 rc = wavrd_check_header(wav, argv[1]);
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41 if (rc < 0)
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42 exit(1); /* error msg already printed */
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43 outf = fopen(argv[2], "w");
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44 if (!outf) {
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45 perror(argv[2]);
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46 exit(1);
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47 }
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48 for (;;) {
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49 cc = wavrd_get_pcm_block(wav, pcm);
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50 if (!cc)
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51 break;
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52 dp = bytes;
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53 for (i = 0; i < cc; i++) {
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54 samp = pcm[i];
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55 if (big_endian) {
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56 *dp++ = (samp >> 8) & 0xFF;
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57 *dp++ = samp & 0xFF;
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58 } else {
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59 *dp++ = samp & 0xFF;
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60 *dp++ = (samp >> 8) & 0xFF;
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61 }
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62 }
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63 fwrite(bytes, 2, cc, outf);
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64 }
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65 fclose(outf);
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66 exit(0);
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67 }