FreeCalypso > hg > gsm-codec-lib
annotate libgsmhr1/typedefs.h @ 557:129c895a0564
hrutil: new program gsmhr-cod2hex
| author | Mychaela Falconia <falcon@freecalypso.org> |
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| date | Thu, 06 Feb 2025 08:38:27 +0000 |
| parents | 446a4a2955ba |
| children | 02a3c88b415d |
| rev | line source |
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libgsmhr1/typedefs.h: import original
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1 /******************************************************************* |
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2 * |
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3 * typedef statements of types used in all half-rate GSM routines |
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4 * |
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5 ******************************************************************/ |
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6 |
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7 #ifndef __TYPEDEFS |
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8 #define __TYPEDEFS |
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9 |
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10 #include <stdint.h> |
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11 |
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12 #define LW_SIGN (long)0x80000000 /* sign bit */ |
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13 #define LW_MIN (long)0x80000000 |
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14 #define LW_MAX (long)0x7fffffff |
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15 |
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16 #define SW_SIGN (short)0x8000 /* sign bit for Shortword type */ |
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17 #define SW_MIN (short)0x8000 /* smallest Ram */ |
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18 #define SW_MAX (short)0x7fff /* largest Ram */ |
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19 |
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20 /* Definition of Types * |
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21 ***********************/ |
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22 |
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23 typedef int32_t Longword; /* 32 bit "accumulator" (L_*) */ |
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24 typedef int16_t Shortword; /* 16 bit "register" (sw*) */ |
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25 typedef int16_t ShortwordRom; /* 16 bit ROM data (sr*) */ |
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26 typedef int32_t LongwordRom; /* 32 bit ROM data (L_r*) */ |
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27 |
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28 struct NormSw |
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29 { /* normalized Shortword fractional |
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30 * number snr.man precedes snr.sh (the |
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31 * shift count)i */ |
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32 Shortword man; /* "mantissa" stored in 16 bit |
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33 * location */ |
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34 Shortword sh; /* the shift count, stored in 16 bit |
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35 * location */ |
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36 }; |
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37 |
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38 /* Global constants * |
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39 ********************/ |
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40 |
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41 #define NP 10 /* order of the lpc filter */ |
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42 #define N_SUB 4 /* number of subframes */ |
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43 #define F_LEN 160 /* number of samples in a frame */ |
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44 #define S_LEN 40 /* number of samples in a subframe */ |
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45 #define A_LEN 170 /* LPC analysis length */ |
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46 #define OS_FCTR 6 /* maximum LTP lag oversampling |
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47 * factor */ |
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48 |
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49 #define OVERHANG 8 /* vad parameter */ |
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50 |
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51 #endif |
