FreeCalypso > hg > freecalypso-tools
view miscutil/fc-gsm2vm.c @ 619:f82551c77e58
libserial-newlnx: ASYNC_LOW_LATENCY patch reverted
Reports from Das Signal indicate that loadtools performance on Debian
is about the same as on Slackware, and that including or omitting the
ASYNC_LOW_LATENCY patch from Serg makes no difference. Because the
patch in question does not appear to be necessary, it is being reverted
until and unless someone other than Serg reports an actual real-world
system on which loadtools operation times are slowed compared to the
Mother's Slackware reference and on which Slackware-like performance
can be restored by setting the ASYNC_LOW_LATENCY flag.
author | Mychaela Falconia <falcon@freecalypso.org> |
---|---|
date | Thu, 27 Feb 2020 01:09:48 +0000 |
parents | f736f3ce8310 |
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); }