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view libgsmhr1/typedefs.h @ 503:3654df24451f
libgsmhr1/mathdp31.[ch]: import original
author | Mychaela Falconia <falcon@freecalypso.org> |
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date | Wed, 19 Jun 2024 01:16:47 +0000 |
parents | 446a4a2955ba |
children |
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/******************************************************************* * * typedef statements of types used in all half-rate GSM routines * ******************************************************************/ #ifndef __TYPEDEFS #define __TYPEDEFS #include <stdint.h> #define LW_SIGN (long)0x80000000 /* sign bit */ #define LW_MIN (long)0x80000000 #define LW_MAX (long)0x7fffffff #define SW_SIGN (short)0x8000 /* sign bit for Shortword type */ #define SW_MIN (short)0x8000 /* smallest Ram */ #define SW_MAX (short)0x7fff /* largest Ram */ /* Definition of Types * ***********************/ typedef int32_t Longword; /* 32 bit "accumulator" (L_*) */ typedef int16_t Shortword; /* 16 bit "register" (sw*) */ typedef int16_t ShortwordRom; /* 16 bit ROM data (sr*) */ typedef int32_t LongwordRom; /* 32 bit ROM data (L_r*) */ struct NormSw { /* normalized Shortword fractional * number snr.man precedes snr.sh (the * shift count)i */ Shortword man; /* "mantissa" stored in 16 bit * location */ Shortword sh; /* the shift count, stored in 16 bit * location */ }; /* Global constants * ********************/ #define NP 10 /* order of the lpc filter */ #define N_SUB 4 /* number of subframes */ #define F_LEN 160 /* number of samples in a frame */ #define S_LEN 40 /* number of samples in a subframe */ #define A_LEN 170 /* LPC analysis length */ #define OS_FCTR 6 /* maximum LTP lag oversampling * factor */ #define OVERHANG 8 /* vad parameter */ #endif