FreeCalypso > hg > freecalypso-tools
annotate miscutil/fc-fr2tch.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> |
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date | Thu, 27 Feb 2020 01:09:48 +0000 |
parents | 7eaa3307e5df |
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rev | line source |
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fc-fr2tch utility written, added under miscutil
Mychaela Falconia <falcon@freecalypso.org>
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1 /* |
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2 * This utility converts a GSM 06.10 speech recording from the format that is |
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fc-fr2tch utility written, added under miscutil
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3 * commonly accepted as standard in the Unix/Linux world (libgsm format) into |
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4 * hex strings of TCH bits to be fed to the GSM 05.03 channel encoder by way |
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5 * of a TI Calypso GSM device, a FreeCalypso GSM firmware version with the |
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6 * TCH rerouting feature, and fc-shell's tch play command. |
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7 */ |
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8 |
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9 #include <sys/types.h> |
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10 #include <stdio.h> |
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11 #include <stdlib.h> |
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12 |
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13 main(argc, argv) |
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14 char **argv; |
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15 { |
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16 FILE *inf, *outf; |
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17 u_char libgsm_bytes[33], tidsp_bytes[33]; |
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18 int cc, i, gotsome = 0; |
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19 |
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20 if (argc != 3) { |
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21 fprintf(stderr, "usage: %s infile outfile\n", argv[0]); |
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22 exit(1); |
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23 } |
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24 inf = fopen(argv[1], "r"); |
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25 if (!inf) { |
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26 perror(argv[1]); |
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27 exit(1); |
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28 } |
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29 outf = fopen(argv[2], "w"); |
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30 if (!outf) { |
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31 perror(argv[2]); |
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32 exit(1); |
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33 } |
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34 for (;;) { |
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35 cc = fread(libgsm_bytes, 1, 33, inf); |
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36 if (cc < 33) |
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37 break; |
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38 if ((libgsm_bytes[0] & 0xF0) != 0xD0) { |
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39 invalid: fprintf(stderr, "error: %s is not in libgsm format\n", |
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40 argv[1]); |
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41 exit(1); |
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42 } |
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43 gsm0610_libgsm_to_tidsp(libgsm_bytes, tidsp_bytes); |
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44 for (i = 0; i < 33; i++) |
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45 fprintf(outf, "%02X", tidsp_bytes[i]); |
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46 putc('\n', outf); |
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47 gotsome = 1; |
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48 } |
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49 fclose(outf); |
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50 if (cc) { |
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51 if (gotsome) |
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52 fprintf(stderr, |
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53 "warning: extra non-33 bytes at the end of %s\n", |
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54 argv[1]); |
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55 else |
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56 goto invalid; |
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57 } |
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58 exit(0); |
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59 } |