/* This source code is a product of Sun Microsystems, Inc. and is provided * for unrestricted use.  Users may copy or modify this source code without * charge. * * SUN SOURCE CODE IS PROVIDED AS IS WITH NO WARRANTIES OF ANY KIND INCLUDING * THE WARRANTIES OF DESIGN, MERCHANTIBILITY AND FITNESS FOR A PARTICULAR * PURPOSE, OR ARISING FROM A COURSE OF DEALING, USAGE OR TRADE PRACTICE. * * Sun source code is provided with no support and without any obligation on * the part of Sun Microsystems, Inc. to assist in its use, correction, * modification or enhancement. * * SUN MICROSYSTEMS, INC. SHALL HAVE NO LIABILITY WITH RESPECT TO THE * INFRINGEMENT OF COPYRIGHTS, TRADE SECRETS OR ANY PATENTS BY THIS SOFTWARE * OR ANY PART THEREOF. * * In no event will Sun Microsystems, Inc. be liable for any lost revenue * or profits or other special, indirect and consequential damages, even if * Sun has been advised of the possibility of such damages. * * Sun Microsystems, Inc. * 2550 Garcia Avenue * Mountain View, California  94043 */ /* * g72x.h * * Header file for CCITT conversion routines. * */#ifndef _G72X_H#define	_G72X_H /* aliases */#define g721_decoder lsx_g721_decoder#define g721_encoder lsx_g721_encoder#define g723_24_decoder lsx_g723_24_decoder#define g723_24_encoder lsx_g723_24_encoder#define g723_40_decoder lsx_g723_40_decoder#define g723_40_encoder lsx_g723_40_encoder#define g72x_init_state lsx_g72x_init_state#define predictor_pole lsx_g72x_predictor_pole#define predictor_zero lsx_g72x_predictor_zero#define quantize lsx_g72x_quantize#define reconstruct lsx_g72x_reconstruct#define step_size lsx_g72x_step_size#define tandem_adjust_alaw lsx_g72x_tandem_adjust_alaw#define tandem_adjust_ulaw lsx_g72x_tandem_adjust_ulaw#define update lsx_g72x_update #define	AUDIO_ENCODING_ULAW	(1)	/* ISDN u-law */#define	AUDIO_ENCODING_ALAW	(2)	/* ISDN A-law */#define	AUDIO_ENCODING_LINEAR	(3)	/* PCM 2's-complement (0-center) */ /* * The following is the definition of the state structure * used by the G.721/G.723 encoder and decoder to preserve their internal * state between successive calls.  The meanings of the majority * of the state structure fields are explained in detail in the * CCITT Recommendation G.721.  The field names are essentially indentical * to variable names in the bit level description of the coding algorithm * included in this Recommendation. */struct g72x_state {	long yl;	/* Locked or steady state step size multiplier. */	short yu;	/* Unlocked or non-steady state step size multiplier. */	short dms;	/* Short term energy estimate. */	short dml;	/* Long term energy estimate. */	short ap;	/* Linear weighting coefficient of 'yl' and 'yu'. */ 	short a[2];	/* Coefficients of pole portion of prediction filter. */	short b[6];	/* Coefficients of zero portion of prediction filter. */	short pk[2];	/*			 * Signs of previous two samples of a partially			 * reconstructed signal.			 */	short dq[6];	/*			 * Previous 6 samples of the quantized difference			 * signal represented in an internal floating point			 * format.			 */	short sr[2];	/*			 * Previous 2 samples of the quantized difference			 * signal represented in an internal floating point			 * format.			 */	char td;	/* delayed tone detect, new in 1988 version */}; /* External function definitions. */ extern void g72x_init_state(struct g72x_state *);extern int g721_encoder(	int sample,	int in_coding,	struct g72x_state *state_ptr);extern int g721_decoder(	int code,	int out_coding,	struct g72x_state *state_ptr);extern int g723_16_encoder(        int sample,        int in_coding,        struct g72x_state *state_ptr);extern int g723_16_decoder(        int code,        int out_coding,        struct g72x_state *state_ptr);extern int g723_24_encoder(	int sample,	int in_coding,	struct g72x_state *state_ptr);extern int g723_24_decoder(	int code,	int out_coding,	struct g72x_state *state_ptr);extern int g723_40_encoder(	int sample,	int in_coding,	struct g72x_state *state_ptr);extern int g723_40_decoder(	int code,	int out_coding,	struct g72x_state *state_ptr); int predictor_zero(struct g72x_state *state_ptr);int predictor_pole(struct g72x_state *state_ptr);int step_size(struct g72x_state *state_ptr);int quantize(int d,	     int y,	     short const *table,	     int size);int reconstruct(int sign,		int dqln,		int y);void update(int code_size,	    int y,	    int wi,	    int fi,	    int dq,	    int sr,	    int dqsez,	    struct g72x_state *state_ptr);int tandem_adjust_alaw(int sr,		       int se,		       int y,		       int i,		       int sign,		       short const *qtab);int tandem_adjust_ulaw(int sr,		       int se,		       int y,		       int i,		       int sign,		       short const *qtab);#endif /* !_G72X_H */