/*

 * Copyright 1992 by Jutta Degener and Carsten Bormann, Technische

 * Universitaet Berlin.  See the accompanying file "COPYRIGHT" for

 * details.  THERE IS ABSOLUTELY NO WARRANTY FOR THIS SOFTWARE.

 */

/*$Header: /tmp_amd/presto/export/kbs/jutta/src/gsm/RCS/private.h,v 1.6 1996/07/02 10:15:26 jutta Exp $*/

#ifndef	PRIVATE_H

#define	PRIVATE_H

typedef short			word;		/* 16 bit signed int	*/

typedef long			longword;	/* 32 bit signed int	*/

typedef unsigned short		uword;		/* unsigned word	*/

typedef unsigned long		ulongword;	/* unsigned longword	*/

struct gsm_state {

	word		dp0[ 280 ];

	word		z1;		/* preprocessing.c, Offset_com. */

	longword	L_z2;		/*                  Offset_com. */

	int		mp;		/*                  Preemphasis	*/

	word		u[8];		/* short_term_aly_filter.c	*/

	word		LARpp[2][8]; 	/*                              */

	word		j;		/*                              */

	word            ltp_cut;        /* long_term.c, LTP crosscorr.  */

	word		nrp; /* 40 */	/* long_term.c, synthesis	*/

	word		v[9];		/* short_term.c, synthesis	*/

	word		msr;		/* decoder.c,	Postprocessing	*/

	char		verbose;	/* only used if !NDEBUG		*/

	char		fast;		/* only used if FAST		*/

	char		wav_fmt;	/* only used if WAV49 defined	*/

	unsigned char	frame_index;	/*            odd/even chaining	*/

	unsigned char	frame_chain;	/*   half-byte to carry forward	*/

};

#define	MIN_WORD	(-32767 - 1)

#define	MAX_WORD	  32767

#define	MIN_LONGWORD	(-2147483647 - 1)

#define	MAX_LONGWORD	  2147483647

#ifdef	SASR		/* flag: >> is a signed arithmetic shift right */

#undef	SASR

#define	SASR(x, by)	((x) >> (by))

#else

#define	SASR(x, by)	((x) >= 0 ? (x) >> (by) : (~(-((x) + 1) >> (by))))

#endif	/* SASR */

#include "proto.h"

/*

 *	Prototypes from add.c

 */

extern word	gsm_mult 	P((word a, word b));

extern longword gsm_L_mult 	P((word a, word b));

extern word	gsm_mult_r	P((word a, word b));

extern word	gsm_div  	P((word num, word denum));

extern word	gsm_add 	P(( word a, word b ));

extern longword gsm_L_add 	P(( longword a, longword b ));

extern word	gsm_sub 	P((word a, word b));

extern longword gsm_L_sub 	P((longword a, longword b));

extern word	gsm_abs 	P((word a));

extern word	gsm_norm 	P(( longword a ));

extern longword gsm_L_asl  	P((longword a, int n));

extern word	gsm_asl 	P((word a, int n));

extern longword gsm_L_asr  	P((longword a, int n));

extern word	gsm_asr  	P((word a, int n));

/*

 *  Inlined functions from add.h 

 */

/* 

 * #define GSM_MULT_R(a, b) (* word a, word b, !(a == b == MIN_WORD) *)	\

 *	(0x0FFFF & SASR(((longword)(a) * (longword)(b) + 16384), 15))

 */

#define GSM_MULT_R(a, b) /* word a, word b, !(a == b == MIN_WORD) */	\

	(SASR( ((longword)(a) * (longword)(b) + 16384), 15 ))

# define GSM_MULT(a,b)	 /* word a, word b, !(a == b == MIN_WORD) */	\

	(SASR( ((longword)(a) * (longword)(b)), 15 ))

# define GSM_L_MULT(a, b) /* word a, word b */	\

	(((longword)(a) * (longword)(b)) << 1)

# define GSM_L_ADD(a, b)	\

	( (a) <  0 ? ( (b) >= 0 ? (a) + (b)	\

		 : (utmp = (ulongword)-((a) + 1) + (ulongword)-((b) + 1)) \

		   >= MAX_LONGWORD ? MIN_LONGWORD : -(longword)utmp-2 )   \

	: ((b) <= 0 ? (a) + (b)   \

	          : (utmp = (ulongword)(a) + (ulongword)(b)) >= MAX_LONGWORD \

		    ? MAX_LONGWORD : utmp))

/*

 * # define GSM_ADD(a, b)	\

 * 	((ltmp = (longword)(a) + (longword)(b)) >= MAX_WORD \

 * 	? MAX_WORD : ltmp <= MIN_WORD ? MIN_WORD : ltmp)

 */

/* Nonportable, but faster: */

#define	GSM_ADD(a, b)	\

	((ulongword)((ltmp = (longword)(a) + (longword)(b)) - MIN_WORD) > \

		MAX_WORD - MIN_WORD ? (ltmp > 0 ? MAX_WORD : MIN_WORD) : ltmp)

# define GSM_SUB(a, b)	\

	((ltmp = (longword)(a) - (longword)(b)) >= MAX_WORD \

	? MAX_WORD : ltmp <= MIN_WORD ? MIN_WORD : ltmp)

# define GSM_ABS(a)	((a) < 0 ? ((a) == MIN_WORD ? MAX_WORD : -(a)) : (a))

/* Use these if necessary:

# define GSM_MULT_R(a, b)	gsm_mult_r(a, b)

# define GSM_MULT(a, b)		gsm_mult(a, b)

# define GSM_L_MULT(a, b)	gsm_L_mult(a, b)

# define GSM_L_ADD(a, b)	gsm_L_add(a, b)

# define GSM_ADD(a, b)		gsm_add(a, b)

# define GSM_SUB(a, b)		gsm_sub(a, b)

# define GSM_ABS(a)		gsm_abs(a)

*/

/*

 *  More prototypes from implementations..

 */

extern void Gsm_Coder P((

		struct gsm_state	* S,

		word	* s,	/* [0..159] samples		IN	*/

		word	* LARc,	/* [0..7] LAR coefficients	OUT	*/

		word	* Nc,	/* [0..3] LTP lag		OUT 	*/

		word	* bc,	/* [0..3] coded LTP gain	OUT 	*/

		word	* Mc,	/* [0..3] RPE grid selection	OUT     */

		word	* xmaxc,/* [0..3] Coded maximum amplitude OUT	*/

		word	* xMc	/* [13*4] normalized RPE samples OUT	*/));

extern void Gsm_Long_Term_Predictor P((		/* 4x for 160 samples */

		struct gsm_state * S,

		word	* d,	/* [0..39]   residual signal	IN	*/

		word	* dp,	/* [-120..-1] d'		IN	*/

		word	* e,	/* [0..40] 			OUT	*/

		word	* dpp,	/* [0..40] 			OUT	*/

		word	* Nc,	/* correlation lag		OUT	*/

		word	* bc	/* gain factor			OUT	*/));

extern void Gsm_LPC_Analysis P((

		struct gsm_state * S,

		word * s,	 /* 0..159 signals	IN/OUT	*/

	        word * LARc));   /* 0..7   LARc's	OUT	*/

extern void Gsm_Preprocess P((

		struct gsm_state * S,

		word * s, word * so));

extern void Gsm_Encoding P((

		struct gsm_state * S,

		word	* e,	

		word	* ep,	

		word	* xmaxc,

		word	* Mc,	

		word	* xMc));

extern void Gsm_Short_Term_Analysis_Filter P((

		struct gsm_state * S,

		word	* LARc,	/* coded log area ratio [0..7]  IN	*/

		word	* d	/* st res. signal [0..159]	IN/OUT	*/));

extern void Gsm_Decoder P((

		struct gsm_state * S,

		word	* LARcr,	/* [0..7]		IN	*/

		word	* Ncr,		/* [0..3] 		IN 	*/

		word	* bcr,		/* [0..3]		IN	*/

		word	* Mcr,		/* [0..3] 		IN 	*/

		word	* xmaxcr,	/* [0..3]		IN 	*/

		word	* xMcr,		/* [0..13*4]		IN	*/

		word	* s));		/* [0..159]		OUT 	*/

extern void Gsm_Decoding P((

		struct gsm_state * S,

		word 	xmaxcr,

		word	Mcr,

		word	* xMcr,  	/* [0..12]		IN	*/

		word	* erp)); 	/* [0..39]		OUT 	*/

extern void Gsm_Long_Term_Synthesis_Filtering P((

		struct gsm_state* S,

		word	Ncr,

		word	bcr,

		word	* erp,		/* [0..39]		  IN 	*/

		word	* drp)); 	/* [-120..-1] IN, [0..40] OUT 	*/

void Gsm_RPE_Decoding P((

	struct gsm_state *S,

		word xmaxcr,

		word Mcr,

		word * xMcr,  /* [0..12], 3 bits             IN      */

		word * erp)); /* [0..39]                     OUT     */

void Gsm_RPE_Encoding P((

		struct gsm_state * S,

		word    * e,            /* -5..-1][0..39][40..44     IN/OUT  */

		word    * xmaxc,        /*                              OUT */

		word    * Mc,           /*                              OUT */

		word    * xMc));        /* [0..12]                      OUT */

extern void Gsm_Short_Term_Synthesis_Filter P((

		struct gsm_state * S,

		word	* LARcr, 	/* log area ratios [0..7]  IN	*/

		word	* drp,		/* received d [0...39]	   IN	*/

		word	* s));		/* signal   s [0..159]	  OUT	*/

extern void Gsm_Update_of_reconstructed_short_time_residual_signal P((

		word	* dpp,		/* [0...39]	IN	*/

		word	* ep,		/* [0...39]	IN	*/

		word	* dp));		/* [-120...-1]  IN/OUT 	*/

/*

 *  Tables from table.c

 */

#ifndef	GSM_TABLE_C

extern word gsm_A[8], gsm_B[8], gsm_MIC[8], gsm_MAC[8];

extern word gsm_INVA[8];

extern word gsm_DLB[4], gsm_QLB[4];

extern word gsm_H[11];

extern word gsm_NRFAC[8];

extern word gsm_FAC[8];

#endif	/* GSM_TABLE_C */

/*

 *  Debugging

 */

#ifdef NDEBUG

#	define	gsm_debug_words(a, b, c, d)		/* nil */

#	define	gsm_debug_longwords(a, b, c, d)		/* nil */

#	define	gsm_debug_word(a, b)			/* nil */

#	define	gsm_debug_longword(a, b)		/* nil */

#else	/* !NDEBUG => DEBUG */

	extern void  gsm_debug_words     P((char * name, int, int, word *));

	extern void  gsm_debug_longwords P((char * name, int, int, longword *));

	extern void  gsm_debug_longword  P((char * name, longword));

	extern void  gsm_debug_word      P((char * name, word));

#endif /* !NDEBUG */

#include "unproto.h"

#endif	/* PRIVATE_H */