FreeCalypso > hg > freecalypso-tools
view tchtools/fc-vm2gsmx.c @ 995:74024eb17e04
fc-loadtool help: improve language regarding 16 MiB flash chips
In FC project history, 16 MiB flash originally meant Pirelli DP-L10.
Then we got FCDEV3B with the same flash (our own design), but now we are
discovering more Calypso devices that used such large flash, both late
Calypso era (Sony Ericsson K2x0) as well as much earlier ones (FIC FLUID
devices.txt file with 2004 dates, Leonardo+ rev 5). Hence we need to
migrate to more generic or neutral language in associated documentation,
without giving elevated status to specific examples that drove our
early project history.
author | Mychaela Falconia <falcon@freecalypso.org> |
---|---|
date | Sun, 03 Dec 2023 21:11:12 +0000 |
parents | 546bf873ccc8 |
children |
line wrap: on
line source
/* * This utility converts old-fashioned (non-AMR) TCS211 voice memo files * read out of FFS into Themyscira Wireless gsmx (extended-libgsm) format, * allowing further decoding into playable speech with gsmfr-decode. */ #include <sys/types.h> #include <stdio.h> #include <stdlib.h> static char *infname; static FILE *inf, *outf; static u_long file_offset; static const u_char bfi_marker[2] = {0xBF, 0x00}; static unsigned get_word() { u_char b[2]; int i, c; for (i = 0; i < 2; i++) { c = getc(inf); if (c < 0) { fprintf(stderr, "error: premature EOF in %s\n", infname); exit(1); } b[i] = c; file_offset++; } return((b[1] << 8) | b[0]); } static void read_dsp_bytes(bytes) u_char *bytes; { int i, dp; unsigned word; dp = 0; for (i = 0; i < 17; i++) { word = get_word(); bytes[dp++] = word >> 8; bytes[dp++] = word; } } static void convert_speech_sample() { u_char tidsp_bytes[34], libgsm_bytes[33]; read_dsp_bytes(tidsp_bytes); gsm0610_tidsp_to_libgsm(tidsp_bytes, libgsm_bytes); fwrite(libgsm_bytes, 1, 33, outf); } main(argc, argv) char **argv; { unsigned first_word; if (argc != 3) { fprintf(stderr, "usage: %s infile outfile\n", argv[0]); exit(1); } infname = argv[1]; inf = fopen(infname, "r"); if (!inf) { perror(infname); exit(1); } outf = fopen(argv[2], "w"); if (!outf) { perror(argv[2]); exit(1); } for (;;) { first_word = get_word(); if (first_word == 0xFBFF) /* SC_VM_END_MASK */ break; if ((first_word & 0xB7FF) == 0x8400) { /* skip dummy header words 1 and 2 */ get_word(); get_word(); /* process the actual speech or SID frame */ convert_speech_sample(); } else if (first_word == 0x0400) { /* it's a skipped frame, aka BFI */ fwrite(bfi_marker, 1, 2, outf); } else { fprintf(stderr, "error in %s at offset 0x%lx: invalid frame header word 0x%04X\n", infname, file_offset, first_word); exit(1); } } fclose(outf); exit(0); }