FreeCalypso > hg > ice1-trau-tester

annotate ater8/read_file.c @ 51:db39e8855f3d

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ater: implement play-d144
author Mychaela Falconia <falcon@freecalypso.org>
date Wed, 25 Sep 2024 05:53:38 +0000
parents ff94d7fc5891
children
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1 /*
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2 * Here we implement the function that reads ETSI *.dec binary files
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3 * which we've adopted as our TRAU-UL test input format for GSM-HR.
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4 */
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5
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6 #include <sys/types.h>
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7 #include <sys/file.h>
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8 #include <sys/stat.h>
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9 #include <stdint.h>
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10 #include <stdbool.h>
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11 #include <stdio.h>
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12 #include <stdlib.h>
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13 #include <string.h>
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14 #include <unistd.h>
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15 #include "../libhr/tw_gsmhr.h"
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16
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17 #include "read_file.h"
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18
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19 static int validate_frames(const int16_t *buf, unsigned nframes)
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20 {
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21 unsigned n;
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22 int rc;
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23 int16_t expect_taf;
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25 for (n = 0; n < nframes; n++) {
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26 rc = gsmhr_check_decoder_params(buf);
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27 if (rc < 0)
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28 return rc;
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29 /* disallow BFI=2 non-ETSI extension */
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30 if (buf[18] > 1)
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31 return -1;
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32 /* enforce TAF matching position */
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33 if (n % 12 == 11)
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34 expect_taf = 1;
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35 else
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36 expect_taf = 0;
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37 if (buf[21] != expect_taf)
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38 return -1;
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39 buf += GSMHR_NUM_PARAMS_DEC;
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40 }
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41 return 0;
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42 }
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43
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44 int read_binary_file(const char *filename, int16_t **bufret, unsigned *size_ret)
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45 {
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46 int fd, rc;
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47 struct stat st;
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48 int16_t *buf;
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49 unsigned nframes;
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50
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51 fd = open(filename, O_RDONLY);
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52 if (fd < 0) {
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53 perror(filename);
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54 return -1;
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55 }
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56 fstat(fd, &st);
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57 if (!S_ISREG(st.st_mode)) {
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58 close(fd);
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59 fprintf(stderr, "error: %s is not a regular file\n", filename);
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60 return -1;
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61 }
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62 if (!st.st_size) {
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63 close(fd);
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64 fprintf(stderr, "error: %s is an empty file\n", filename);
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65 return -1;
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66 }
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67 if (st.st_size % 44) {
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68 close(fd);
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69 fprintf(stderr,
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70 "error: size of %s is not a multiple of 44 bytes\n",
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71 filename);
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72 return -1;
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73 }
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74 buf = malloc(st.st_size);
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75 if (!buf) {
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76 close(fd);
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77 fprintf(stderr, "unable to malloc buffer for %s\n", filename);
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78 return -1;
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79 }
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80 read(fd, buf, st.st_size);
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81 close(fd);
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82 nframes = st.st_size / 44;
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83
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84 rc = validate_frames(buf, nframes);
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85 if (rc < 0) {
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86 free(buf);
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87 fprintf(stderr,
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88 "error: %s is not a valid GSM-HR dec file, or has wrong endian\n",
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89 filename);
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90 return -1;
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91 }
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92 *bufret = buf;
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93 *size_ret = nframes;
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94 return 0;
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95 }