308 lines
8.2 KiB
C
308 lines
8.2 KiB
C
/*
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* Copyright 1992 by Jutta Degener and Carsten Bormann, Technische
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* Universitaet Berlin. See the accompanying file "COPYRIGHT" for
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* details. THERE IS ABSOLUTELY NO WARRANTY FOR THIS SOFTWARE.
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*/
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/*$Header$*/
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#ifndef PRIVATE_H
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#define PRIVATE_H
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typedef short word; /* 16 bit signed int */
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typedef long longword; /* 32 bit signed int */
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typedef unsigned short uword; /* unsigned word */
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typedef unsigned long ulongword; /* unsigned longword */
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struct gsm_state {
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word dp0[ 280 ];
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word z1; /* preprocessing.c, Offset_com. */
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longword L_z2; /* Offset_com. */
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int mp; /* Preemphasis */
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word u[8]; /* short_term_aly_filter.c */
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word LARpp[2][8]; /* */
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word j; /* */
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word ltp_cut; /* long_term.c, LTP crosscorr. */
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word nrp; /* 40 */ /* long_term.c, synthesis */
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word v[9]; /* short_term.c, synthesis */
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word msr; /* decoder.c, Postprocessing */
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char verbose; /* only used if !NDEBUG */
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char fast; /* only used if FAST */
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char wav_fmt; /* only used if WAV49 defined */
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unsigned char frame_index; /* odd/even chaining */
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unsigned char frame_chain; /* half-byte to carry forward */
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};
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#define MIN_WORD (-32767 - 1)
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#define MAX_WORD 32767
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#define MIN_LONGWORD (-2147483647 - 1)
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#define MAX_LONGWORD 2147483647
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#ifdef SASR /* flag: >> is a signed arithmetic shift right */
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#undef SASR
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#define SASR(x, by) ((x) >> (by))
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#else
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#define SASR(x, by) ((x) >= 0 ? (x) >> (by) : (~(-((x) + 1) >> (by))))
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#endif /* SASR */
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#include "proto.h"
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/*
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* Prototypes from add.c
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*/
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extern word gsm_mult P((word a, word b));
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extern longword gsm_L_mult P((word a, word b));
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extern word gsm_mult_r P((word a, word b));
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extern word gsm_div P((word num, word denum));
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extern word gsm_add P(( word a, word b ));
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extern longword gsm_L_add P(( longword a, longword b ));
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extern word gsm_sub P((word a, word b));
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extern longword gsm_L_sub P((longword a, longword b));
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extern word gsm_abs P((word a));
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extern word gsm_norm P(( longword a ));
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extern longword gsm_L_asl P((longword a, int n));
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extern word gsm_asl P((word a, int n));
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extern longword gsm_L_asr P((longword a, int n));
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extern word gsm_asr P((word a, int n));
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/*
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* Inlined functions from add.h
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*/
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/*
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* #define GSM_MULT_R(a, b) (* word a, word b, !(a == b == MIN_WORD) *) \
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* (0x0FFFF & SASR(((longword)(a) * (longword)(b) + 16384), 15))
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*/
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#define GSM_MULT_R(a, b) /* word a, word b, !(a == b == MIN_WORD) */ \
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(SASR( ((longword)(a) * (longword)(b) + 16384), 15 ))
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# define GSM_MULT(a,b) /* word a, word b, !(a == b == MIN_WORD) */ \
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(SASR( ((longword)(a) * (longword)(b)), 15 ))
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# define GSM_L_MULT(a, b) /* word a, word b */ \
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(((longword)(a) * (longword)(b)) << 1)
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#if defined(__GNUC__) && defined(__i386__)
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static __inline__ int GSM_L_ADD(int a, int b)
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{
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__asm__ __volatile__(
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"addl %2,%0; jno 0f; movl $0x7fffffff,%0; adcl $0,%0; 0:"
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: "=r" (a)
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: "0" (a), "ir" (b)
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: "cc"
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);
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return(a);
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}
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static __inline__ short GSM_ADD(short a, short b)
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{
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__asm__ __volatile__(
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"addw %2,%0; jno 0f; movw $0x7fff,%0; adcw $0,%0; 0:"
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: "=r" (a)
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: "0" (a), "ir" (b)
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: "cc"
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);
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return(a);
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}
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static __inline__ short GSM_SUB(short a, short b)
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{
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__asm__ __volatile__(
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"subw %2,%0; jno 0f; movw $0x7fff,%0; adcw $0,%0; 0:"
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: "=r" (a)
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: "0" (a), "ir" (b)
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: "cc"
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);
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return(a);
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}
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#else
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# define GSM_L_ADD(a, b) \
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( (a) < 0 ? ( (b) >= 0 ? (a) + (b) \
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: (utmp = (ulongword)-((a) + 1) + (ulongword)-((b) + 1)) \
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>= MAX_LONGWORD ? MIN_LONGWORD : -(longword)utmp-2 ) \
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: ((b) <= 0 ? (a) + (b) \
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: (utmp = (ulongword)(a) + (ulongword)(b)) >= MAX_LONGWORD \
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? MAX_LONGWORD : utmp))
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/*
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* # define GSM_ADD(a, b) \
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* ((ltmp = (longword)(a) + (longword)(b)) >= MAX_WORD \
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* ? MAX_WORD : ltmp <= MIN_WORD ? MIN_WORD : ltmp)
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*/
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/* Nonportable, but faster: */
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#define GSM_ADD(a, b) \
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(short) ((ulongword)((ltmp = (longword)(a) + (longword)(b)) - MIN_WORD) > \
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MAX_WORD - MIN_WORD ? (ltmp > 0 ? MAX_WORD : MIN_WORD) : ltmp)
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# define GSM_SUB(a, b) \
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((ltmp = (longword)(a) - (longword)(b)) >= MAX_WORD \
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? MAX_WORD : ltmp <= MIN_WORD ? MIN_WORD : ltmp)
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#endif
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# define GSM_ABS(a) ((a) < 0 ? ((a) == MIN_WORD ? MAX_WORD : -(a)) : (a))
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/* Use these if necessary:
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# define GSM_MULT_R(a, b) gsm_mult_r(a, b)
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# define GSM_MULT(a, b) gsm_mult(a, b)
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# define GSM_L_MULT(a, b) gsm_L_mult(a, b)
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# define GSM_L_ADD(a, b) gsm_L_add(a, b)
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# define GSM_ADD(a, b) gsm_add(a, b)
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# define GSM_SUB(a, b) gsm_sub(a, b)
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# define GSM_ABS(a) gsm_abs(a)
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*/
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/*
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* More prototypes from implementations..
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*/
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extern void Gsm_Coder P((
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struct gsm_state * S,
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word * s, /* [0..159] samples IN */
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word * LARc, /* [0..7] LAR coefficients OUT */
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word * Nc, /* [0..3] LTP lag OUT */
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word * bc, /* [0..3] coded LTP gain OUT */
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word * Mc, /* [0..3] RPE grid selection OUT */
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word * xmaxc,/* [0..3] Coded maximum amplitude OUT */
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word * xMc /* [13*4] normalized RPE samples OUT */));
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extern void Gsm_Long_Term_Predictor P(( /* 4x for 160 samples */
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struct gsm_state * S,
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word * d, /* [0..39] residual signal IN */
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word * dp, /* [-120..-1] d' IN */
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word * e, /* [0..40] OUT */
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word * dpp, /* [0..40] OUT */
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word * Nc, /* correlation lag OUT */
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word * bc /* gain factor OUT */));
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extern void Gsm_LPC_Analysis P((
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struct gsm_state * S,
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word * s, /* 0..159 signals IN/OUT */
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word * LARc)); /* 0..7 LARc's OUT */
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extern void Gsm_Preprocess P((
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struct gsm_state * S,
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word * s, word * so));
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extern void Gsm_Encoding P((
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struct gsm_state * S,
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word * e,
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word * ep,
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word * xmaxc,
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word * Mc,
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word * xMc));
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extern void Gsm_Short_Term_Analysis_Filter P((
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struct gsm_state * S,
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word * LARc, /* coded log area ratio [0..7] IN */
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word * d /* st res. signal [0..159] IN/OUT */));
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extern void Gsm_Decoder P((
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struct gsm_state * S,
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word * LARcr, /* [0..7] IN */
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word * Ncr, /* [0..3] IN */
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word * bcr, /* [0..3] IN */
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word * Mcr, /* [0..3] IN */
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word * xmaxcr, /* [0..3] IN */
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word * xMcr, /* [0..13*4] IN */
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word * s)); /* [0..159] OUT */
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extern void Gsm_Decoding P((
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struct gsm_state * S,
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word xmaxcr,
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word Mcr,
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word * xMcr, /* [0..12] IN */
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word * erp)); /* [0..39] OUT */
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extern void Gsm_Long_Term_Synthesis_Filtering P((
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struct gsm_state* S,
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word Ncr,
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word bcr,
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word * erp, /* [0..39] IN */
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word * drp)); /* [-120..-1] IN, [0..40] OUT */
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void Gsm_RPE_Decoding P((
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struct gsm_state *S,
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word xmaxcr,
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word Mcr,
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word * xMcr, /* [0..12], 3 bits IN */
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word * erp)); /* [0..39] OUT */
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void Gsm_RPE_Encoding P((
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struct gsm_state * S,
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word * e, /* -5..-1][0..39][40..44 IN/OUT */
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word * xmaxc, /* OUT */
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word * Mc, /* OUT */
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word * xMc)); /* [0..12] OUT */
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extern void Gsm_Short_Term_Synthesis_Filter P((
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struct gsm_state * S,
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word * LARcr, /* log area ratios [0..7] IN */
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word * drp, /* received d [0...39] IN */
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word * s)); /* signal s [0..159] OUT */
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extern void Gsm_Update_of_reconstructed_short_time_residual_signal P((
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word * dpp, /* [0...39] IN */
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word * ep, /* [0...39] IN */
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word * dp)); /* [-120...-1] IN/OUT */
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/*
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* Tables from table.c
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*/
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#ifndef GSM_TABLE_C
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extern word gsm_A[8], gsm_B[8], gsm_MIC[8], gsm_MAC[8];
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extern word gsm_INVA[8];
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extern word gsm_DLB[4], gsm_QLB[4];
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extern word gsm_H[11];
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extern word gsm_NRFAC[8];
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extern word gsm_FAC[8];
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#endif /* GSM_TABLE_C */
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/*
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* Debugging
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*/
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#ifdef NDEBUG
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# define gsm_debug_words(a, b, c, d) /* nil */
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# define gsm_debug_longwords(a, b, c, d) /* nil */
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# define gsm_debug_word(a, b) /* nil */
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# define gsm_debug_longword(a, b) /* nil */
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#else /* !NDEBUG => DEBUG */
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extern void gsm_debug_words P((char * name, int, int, word *));
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extern void gsm_debug_longwords P((char * name, int, int, longword *));
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extern void gsm_debug_longword P((char * name, longword));
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extern void gsm_debug_word P((char * name, word));
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#endif /* !NDEBUG */
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#include "unproto.h"
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#endif /* PRIVATE_H */
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