FreeCalypso > hg > freecalypso-tools
view tchtools/fc-gsm2vm.c @ 921:74d284add54d
fc-fsio: guard against bogus readdir results from the target
If the FFS being operated on contains SE K2x0 extended filenames,
readdir will return strings that are bad for printing. We need to
guard against this possibility, and also against possible other
bogosity that could be sent by other alien firmwares.
author | Mychaela Falconia <falcon@freecalypso.org> |
---|---|
date | Sat, 31 Dec 2022 22:55:23 +0000 |
parents | 8ddb16a37273 |
children |
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/* * This utility converts a GSM 06.10 speech recording from the format that is * commonly accepted as standard in the Unix/Linux world (libgsm format) into * a voice memo file that can be uploaded into the FFS of a FreeCalypso device * and played with the audio_vm_play_start() API or the AT@VMP command that * invokes the latter. */ #include <sys/types.h> #include <stdio.h> #include <stdlib.h> main(argc, argv) char **argv; { FILE *inf, *outf; u_char libgsm_bytes[33], tidsp_bytes[34], arm_bytes[34]; static u_char header_bytes[6] = {0x00, 0xC4, 0x00, 0x00, 0x00, 0x00}; static u_char endmarker[2] = {0xFF, 0xFB}; 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); } tidsp_bytes[33] = 0; for (;;) { cc = fread(libgsm_bytes, 1, 33, inf); if (cc < 33) break; if ((libgsm_bytes[0] & 0xF0) != 0xD0) { invalid: fprintf(stderr, "error: %s is not in libgsm format\n", argv[1]); exit(1); } gsm0610_libgsm_to_tidsp(libgsm_bytes, tidsp_bytes); for (i = 0; i < 34; i += 2) { arm_bytes[i] = tidsp_bytes[i+1]; arm_bytes[i+1] = tidsp_bytes[i]; } fwrite(header_bytes, 1, 6, outf); fwrite(arm_bytes, 1, 34, outf); gotsome = 1; } fwrite(endmarker, 1, 2, outf); fclose(outf); if (cc) { if (gotsome) fprintf(stderr, "warning: extra non-33 bytes at the end of %s\n", argv[1]); else goto invalid; } exit(0); }