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 * reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer. 
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
 *    the documentation and/or other materials provided with the
 *    distribution.
 *
 *
 * THIS SOFTWARE IS PROVIDED BY CARNEGIE MELLON UNIVERSITY ``AS IS'' AND 
 * ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 
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 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY
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/*
 * cdcn.h -- From the robust speech group at CMU-ECE/SCS
 * 
 * **********************************************
 * CMU ARPA Speech Project
 *
 * Copyright (c) 1996 Carnegie Mellon University.
 * ALL RIGHTS RESERVED.
 * **********************************************
 * 
 * HISTORY
 * 
 * 19-Jun-96	M K Ravishankar (rkm@cs.cmu.edu) at Carnegie Mellon University
 * 		Copied from Uday Jain.  Added ifndef _CDCN_H_.
 */


#ifndef _CDCN_H_
#define _CDCN_H_


/*************************************************************************
 *
 * Defines all the numbers used in CDCN.
 * Also defines the suitcase structure that CDCN uses.
 *
 *************************************************************************/

#define NUM_COEFF		12	/* Number of cepstral coefficients */
#define NUM_SMOOTH              12
#define SPEECH_THRESHOLD	1.0	/* Values in Np (1 Np = 4.34 dB) */
#define N			32	/* Parameters for FFT */
#define N2			64
#define M			5
#define OFFSET_LIKELIHOOD	4.0

/*
 * Since the following definitions are common, define them only if they
 * havent been defined already
 */
#ifndef TRUE
#define TRUE			1
#endif

#ifndef FALSE
#define FALSE			0
#endif

typedef struct suitcase
{
  float *means;		/* The means of the training speech distributions */
  float *variance;	/* Variance of speech codebook */
  float *probs;		/* Ratio of a-priori prob. of modes to mod variance */
  int    num_codes; 	/* Number of codewords in codebook */
  float  noise[NUM_COEFF + 1];
  float  tilt[NUM_COEFF + 1];
  float *corrbook;	
  int    firstcall;
  int    run_cdcn;
} CDCN_type;

int 	cdcn_init (char const *, CDCN_type *);
float   cdcn_update (float *, int, CDCN_type *);
void    cdcn_norm (float *, CDCN_type *);
void    block_cdcn_norm (float z[][NUM_COEFF+1],
			 int num_frames,
			 CDCN_type *cdcn_variabls);

CDCN_type *uttproc_get_cdcn_ptr ( void );

#endif /* _CDCN_H_ */