FreeCalypso > hg > gsm-codec-lib
annotate miscutil/pcm16-check13.c @ 435:9f354d2aea13
efrtest: split etsi-dec.c for code reuse
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Wed, 08 May 2024 05:25:47 +0000 |
parents | 6555dae764b3 |
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1 /* |
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2 * This program reads a 16-bit PCM recording in raw format (robe by default, |
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3 * or LE with -l option) and checks whether or not every sample fits into |
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4 * left-justified 13 bits, with the 3 least significant bits of every 16-bit |
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5 * sample cleared. |
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6 */ |
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7 |
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8 #include <stdio.h> |
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9 #include <stdint.h> |
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10 #include <stdlib.h> |
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11 #include <string.h> |
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12 #include <strings.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 little_endian; |
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18 char *infname; |
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19 FILE *inf; |
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20 unsigned sample_count; |
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21 uint8_t inb[2]; |
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22 uint16_t ins, lowbits; |
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23 int cc; |
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24 |
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25 if (argc == 2 && argv[1][0] != '-') { |
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26 little_endian = 0; |
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27 infname = argv[1]; |
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28 } else if (argc == 3 && !strcmp(argv[1], "-l")) { |
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29 little_endian = 1; |
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30 infname = argv[2]; |
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31 } else { |
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32 fprintf(stderr, "usage: %s [-l] input.pcm16\n", argv[0]); |
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33 exit(1); |
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34 } |
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35 inf = fopen(infname, "r"); |
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36 if (!inf) { |
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37 perror(infname); |
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38 exit(1); |
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39 } |
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40 for (sample_count = 0; ; sample_count++) { |
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41 cc = fread(inb, 1, 2, inf); |
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42 if (cc <= 0) |
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43 break; |
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44 if (cc & 1) { |
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45 fprintf(stderr, "error: %s has odd number of bytes\n", |
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46 infname); |
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47 exit(1); |
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48 } |
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49 if (little_endian) |
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50 ins = ((uint16_t) inb[1] << 8) | ((uint16_t) inb[0]); |
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51 else |
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52 ins = ((uint16_t) inb[0] << 8) | ((uint16_t) inb[1]); |
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53 lowbits = ins & 7; |
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54 if (lowbits) { |
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55 fprintf(stderr, |
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56 "check13 fail: %s sample #%u low 3 bits are %u\n", |
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57 infname, sample_count, lowbits); |
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58 exit(1); |
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59 } |
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60 } |
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61 exit(0); |
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62 } |