/* ====================================================================
 * Copyright (c) 1994-2000 Carnegie Mellon University.  All rights 
 * 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 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.
 *
 * THIS SOFTWARE IS PROVIDED BY CARNEGIE MELLON UNIVERSITY ``AS IS'' AND 
 * ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 
 * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY
 * NOR ITS EMPLOYEES BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * ====================================================================
 *
 */
/*********************************************************************
 *
 * File: mk_sseq.c
 * 
 * Description: 
 * 	Given a state seg sequence and phone sequence, find out what
 *	the senone sequence is for the whole utterance.
 *
 * Author: 
 * 	Eric H. Thayer (eht@cs.cmu.edu)
 *********************************************************************/

#include <s3/mk_sseq.h>

#include <sphinxbase/ckd_alloc.h>

#include <assert.h>

uint32 *
mk_sseq(uint16 *seg,
	uint32 n_frame,
	acmod_id_t *phone,
	uint32 n_phone,
	model_def_t *mdef)
{
    uint32 *sseq;
    uint32 f;
    uint32 p;
    model_def_entry_t *defn = NULL;
    uint32 s;
    uint32 n_state = MAX_N_STATE-1;	/* BEWARE: this should not stay */
    uint16 seg_val;

    sseq = ckd_calloc(n_frame, sizeof(uint32));

    p = 0;
    --p;

    for (f = 0; f < n_frame; f++) {
	seg_val = seg[f];

	if (seg_val & 0x8000) {
	    /* reached a phone begin marker */

	    ++p;	/* next phone */

	    assert(p < n_phone);

	    defn = &mdef->defn[phone[p]];

	    seg_val &= 0x7fff;	/* clr phone begin bit */
	}

	s = seg_val % n_state;	/* model state [0..N-1] where N is # of states/model */

	sseq[f] = defn->state[s];
    }

    return sseq;
}
