FreeCalypso > hg > gsm-codec-lib

comparison amrconv/efr2amr.c @ 184:b092a510141e

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tree reorg: move gsm-amr2efr & gsm-efr2amr to amrconv subdir
author Mychaela Falconia <falcon@freecalypso.org>
date Tue, 03 Jan 2023 02:33:45 +0000
parents miscutil/efr2amr.c@41f1ae68d253
children
comparison
equal deleted inserted replaced
183:452c1d5a6268 184:b092a510141e
1 /*
2 * Our gsm-efr2amr utility reads in an EFR speech recording in our
3 * extended-libgsm file format and converts it to AMR, inserting
4 * an AMR NO_DATA frame in the place of every BFI in the input
5 * but NOT performing any special handling or even detection of
6 * EFR SID frames.
7 */
8
9 #include <stdio.h>
10 #include <stdint.h>
11 #include <stdlib.h>
12 #include <string.h>
13 #include <strings.h>
14 #include "../libtest/binreader.h"
15
16 extern const uint8_t amr_122_bit_order[244];
17
18 static const char amr_file_hdr[] = "#!AMR\n";
19
20 main(argc, argv)
21 char **argv;
22 {
23 char *infname, *outfname;
24 FILE *inf, *outf;
25 int wrong_flag;
26 uint8_t frm_in[BINFILE_MAX_FRAME], frm_out[32];
27 unsigned bit_a, bit_n, outlen;
28 int rc, bfi;
29
30 if (argc == 3 && argv[1][0] != '-') {
31 wrong_flag = 0;
32 infname = argv[1];
33 outfname = argv[2];
34 } else if (argc == 4 && !strcmp(argv[1], "-w")) {
35 wrong_flag = 1;
36 infname = argv[2];
37 outfname = argv[3];
38 } else {
39 fprintf(stderr, "usage: %s [-w] input.gsmx output.amr\n",
40 argv[0]);
41 exit(1);
42 }
43 inf = fopen(infname, "r");
44 if (!inf) {
45 perror(infname);
46 exit(1);
47 }
48 outf = fopen(outfname, "w");
49 if (!outf) {
50 perror(outfname);
51 exit(1);
52 }
53 fwrite(amr_file_hdr, 1, 6, outf);
54 for (;;) {
55 rc = binfile_read_frame(inf, frm_in);
56 if (rc < 0) {
57 fprintf(stderr, "error: garbage in %s\n", infname);
58 exit(1);
59 }
60 if (!rc)
61 break;
62 if (frm_in[0] == 0xBF)
63 bfi = 1;
64 else if ((frm_in[0] & 0xF0) == 0xC0)
65 bfi = 0;
66 else {
67 fprintf(stderr,
68 "error: %s is not in EFR codec format\n",
69 infname);
70 exit(1);
71 }
72 if (bfi) {
73 frm_out[0] = 0x78;
74 outlen = 1;
75 } else {
76 frm_out[0] = 0x3C;
77 frm_out[31] = 0;
78 for (bit_a = 0; bit_a < 244; bit_a++) {
79 if (wrong_flag)
80 bit_n = bit_a;
81 else
82 bit_n = amr_122_bit_order[bit_a];
83 msb_set_bit(frm_out + 1, bit_a,
84 msb_get_bit(frm_in, 4 + bit_n));
85 }
86 outlen = 32;
87 }
88 fwrite(frm_out, 1, outlen, outf);
89 }
90 fclose(outf);
91 exit(0);
92 }