FreeCalypso > hg > freecalypso-tools
view tchtools/fc-efr2tch.c @ 965:2969032bdfac
fcup-smsend[mult]: fix buglet in K&R C NULL pointer passing
The only 100% safe way to pass a NULL pointer as a function argument
in K&R C is to cast 0 to a pointer type; failing to do so may cause
mysterious bugs (invalid stack frames or garbage in argument registers)
on 64-bit machines. This issue has already been fixed in most of
FC host tools, but I just found some missed spots: passing of NULL UDH
to PDU encoding functions in fcup-smsend[mult] in the case of single
(not concatenated) SMS.
author | Mychaela Falconia <falcon@freecalypso.org> |
---|---|
date | Fri, 01 Sep 2023 07:33:51 +0000 |
parents | 94890123a74f |
children |
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/* * This utility converts a GSM EFR speech recording from Themyscira Wireless * gsmx format into hex strings of TCH UL bits, to be fed to the TCH UL play * buffer in the Calypso DSP by way of a suitable FreeCalypso firmware version * and the special tch play command in fc-shell. */ #include <sys/types.h> #include <stdio.h> #include <stdlib.h> main(argc, argv) char **argv; { FILE *inf, *outf; u_char efr_bytes[31], tidsp_bytes[33]; int cc, i, gotsome = 0; if (argc != 3) { fprintf(stderr, "usage: %s infile outfile\n", argv[0]); exit(1); } inf = fopen(argv[1], "r"); if (!inf) { perror(argv[1]); exit(1); } outf = fopen(argv[2], "w"); if (!outf) { perror(argv[2]); exit(1); } for (;;) { cc = fread(efr_bytes, 1, 31, inf); if (cc < 31) break; if ((efr_bytes[0] & 0xF0) != 0xC0) { invalid: fprintf(stderr, "error: %s is not in EFR codec format\n", argv[1]); exit(1); } efr_std_to_tidsp(efr_bytes, tidsp_bytes); for (i = 0; i < 33; i++) fprintf(outf, "%02X", tidsp_bytes[i]); putc('\n', outf); gotsome = 1; } fclose(outf); if (cc) { if (gotsome) fprintf(stderr, "warning: extra non-31 bytes at the end of %s\n", argv[1]); else goto invalid; } exit(0); }