FreeCalypso > hg > gsm-codec-lib
annotate dev/gsm0611-silence-fr.c @ 95:f80a3202c8ff
libgsmefr: implement main decoder wrapper
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Sat, 26 Nov 2022 18:58:56 +0000 |
parents | 61cb83bd11ec |
children | e4ca04586118 |
rev | line source |
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libgsmfrp: starting with the silence frame
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1 /* |
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2 * This program is meant to be run only once by the developer - it uses |
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3 * libgsm function gsm_implode() to transform the idle frame of GSM 06.11 |
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4 * (3GPP TS 46.011) from the table format given in the spec into |
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5 * libgsm/RTP format. |
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6 */ |
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7 |
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8 #include <stdio.h> |
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9 #include <stdlib.h> |
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10 #include <string.h> |
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11 #include <strings.h> |
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12 #include <gsm.h> |
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13 |
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14 static const gsm_signal lar_params[8] = {42, 39, 21, 10, 9, 4, 3, 2}; |
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15 static const gsm_signal subframe_params[17] = |
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GSM 06.11 silence frame: it's Nc=40 first, then bc=0
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16 {40, 0, 1, 0, 3, 4, 3, 4, 4, 3, 3, 3, 3, 4, 4, 3, 3}; |
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17 |
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18 main(argc, argv) |
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19 char **argv; |
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20 { |
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21 gsm state; |
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22 gsm_signal params[76]; |
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23 gsm_byte frame[33]; |
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24 unsigned n; |
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25 |
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26 /* gsm_implode() requires dummy state */ |
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27 state = gsm_create(); |
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28 if (!state) { |
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29 fprintf(stderr, "gsm_create() failed!\n"); |
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30 exit(1); |
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31 } |
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32 /* gather params */ |
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33 bcopy(lar_params, params, sizeof(gsm_signal) * 8); |
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34 bcopy(subframe_params, params + 8, sizeof(gsm_signal) * 17); |
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35 bcopy(subframe_params, params + 25, sizeof(gsm_signal) * 17); |
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36 bcopy(subframe_params, params + 42, sizeof(gsm_signal) * 17); |
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37 bcopy(subframe_params, params + 59, sizeof(gsm_signal) * 17); |
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38 /* generate frame */ |
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39 gsm_implode(state, params, frame); |
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40 /* print the frame */ |
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41 for (n = 0; n < 33; n++) { |
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42 printf("0x%02X,", frame[n]); |
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43 if (n == 4 || n == 11 || n == 18 || n == 25 || n == 32) |
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44 putchar('\n'); |
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45 else |
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46 putchar(' '); |
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47 } |
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48 exit(0); |
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49 } |