/* -*- c-basic-offset: 4; indent-tabs-mode: nil -*- */
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 * Copyright (c) 1999-2004 Carnegie Mellon University.  All rights
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 * This work was supported in part by funding from the Defense Advanced 
 * Research Projects Agency and the National Science Foundation of the 
 * United States of America, and the CMU Sphinx Speech Consortium.
 *
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/*
 * Interface for "semi-continuous vector quantization", a.k.a. Sphinx2
 * fast GMM computation.
 */

#ifndef __S2_SEMI_MGAU_H__
#define __S2_SEMI_MGAU_H__

/* SphinxBase headesr. */
#include <sphinxbase/fe.h>
#include <sphinxbase/logmath.h>
#include <sphinxbase/mmio.h>

/* Local headers. */
#include "acmod.h"
#include "hmm.h"
#include "bin_mdef.h"
#include "ms_gauden.h"

typedef struct vqFeature_s vqFeature_t;

typedef struct s2_semi_mgau_s s2_semi_mgau_t;
struct s2_semi_mgau_s {
    ps_mgau_t base;     /**< base structure. */
    cmd_ln_t *config;   /* configuration parameters */

    gauden_t *g;        /* Set of Gaussians (pointers below point in here and will go away soon) */
    mfcc_t  ***means;	/* mean vectors foreach feature, density */
    mfcc_t  ***vars;	/* inverse var vectors foreach feature, density */
    mfcc_t  **dets;	/* det values foreach cb, feature */

    uint8 ***mixw;     /* mixture weight distributions */
    mmio_file_t *sendump_mmap;/* memory map for mixw (or NULL if not mmap) */

    uint8 *mixw_cb;    /* mixture weight codebook, if any (assume it contains 16 values) */
    int32 *veclen;	/* Length of feature streams */
    int16 n_feat;	/* Number of feature streams */
    int16 n_density;	/* Number of mixtures per codebook */
    int32 n_sen;	/* Number of senones */
    uint8 *topn_beam;   /* Beam for determining per-frame top-N densities */
    int16 max_topn;
    int16 ds_ratio;

    vqFeature_t ***topn_hist; /**< Top-N scores and codewords for past frames. */
    uint8 **topn_hist_n;      /**< Variable top-N for past frames. */
    vqFeature_t **f;          /**< Topn-N for currently scoring frame. */
    int n_topn_hist;          /**< Number of past frames tracked. */

    /* Log-add table for compressed values. */
    logmath_t *lmath_8b;
    /* Log-add object for reloading means/variances. */
    logmath_t *lmath;
};

ps_mgau_t *s2_semi_mgau_init(acmod_t *acmod);
void s2_semi_mgau_free(ps_mgau_t *s);
int s2_semi_mgau_frame_eval(ps_mgau_t *s,
                            int16 *senone_scores,
                            uint8 *senone_active,
                            int32 n_senone_active,
                            mfcc_t **featbuf,
                            int32 frame,
                            int32 compallsen);
int s2_semi_mgau_mllr_transform(ps_mgau_t *s,
                                ps_mllr_t *mllr);


#endif /*  __S2_SEMI_MGAU_H__ */
