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-/* -*- c-basic-offset: 4; indent-tabs-mode: nil -*- */
-/* ====================================================================
- * Copyright (c) 1999-2004 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.
- *
- * ====================================================================
- *
- */
-/*
- * tmat.c
- *
- * **********************************************
- * CMU ARPA Speech Project
- *
- * Copyright (c) 1997 Carnegie Mellon University.
- * ALL RIGHTS RESERVED.
- * **********************************************
- *
- * HISTORY
- * $Log: tmat.c,v $
- * Revision 1.1.1.1 2006/05/23 18:45:01 dhuggins
- * re-importation
- *
- * Revision 1.4 2005/11/14 16:14:34 dhuggins
- * Use LOG() instead of logs3() for loading tmats, makes startup
- * ***much*** faster.
- *
- * Revision 1.3 2005/10/10 14:50:35 dhuggins
- * Deal properly with empty transition matrices.
- *
- * Revision 1.2 2005/09/30 15:01:23 dhuggins
- * More robust tmat reading - read the tmat in accordance with the fixed s2 topology
- *
- * Revision 1.1 2005/09/29 21:51:19 dhuggins
- * Add support for Sphinx3 tmat files. Amazingly enough, it Just Works
- * (but it isn't terribly robust)
- *
- * Revision 1.6 2005/07/05 13:12:39 dhdfu
- * Add new arguments to logs3_init() in some tests, main_ep
- *
- * Revision 1.5 2005/06/21 19:23:35 arthchan2003
- * 1, Fixed doxygen documentation. 2, Added $ keyword.
- *
- * Revision 1.5 2005/05/03 04:09:09 archan
- * Implemented the heart of word copy search. For every ci-phone, every word end, a tree will be allocated to preserve its pathscore. This is different from 3.5 or below, only the best score for a particular ci-phone, regardless of the word-ends will be preserved at every frame. The graph propagation will not collect unused word tree at this point. srch_WST_propagate_wd_lv2 is also as the most stupid in the century. But well, after all, everything needs a start. I will then really get the results from the search and see how it looks.
- *
- * Revision 1.4 2005/04/21 23:50:26 archan
- * Some more refactoring on the how reporting of structures inside kbcore_t is done, it is now 50% nice. Also added class-based LM test case into test-decode.sh.in. At this moment, everything in search mode 5 is already done. It is time to test the idea whether the search can really be used.
- *
- * Revision 1.3 2005/03/30 01:22:47 archan
- * Fixed mistakes in last updates. Add
- *
- *
- * 20.Apr.2001 RAH (rhoughton@mediasite.com, ricky.houghton@cs.cmu.edu)
- * Added tmat_free to free allocated memory
- *
- * 29-Feb-2000 M K Ravishankar (rkm@cs.cmu.edu) at Carnegie Mellon University.
- * Added tmat_chk_1skip(), and made tmat_chk_uppertri() public.
- *
- * 10-Dec-1999 M K Ravishankar (rkm@cs.cmu.edu) at Carnegie Mellon University.
- * Made tmat_dump() public.
- *
- * 11-Mar-97 M K Ravishankar (rkm@cs.cmu.edu) at Carnegie Mellon University.
- * Started based on original S3 implementation.
- */
-
-/* System headers. */
-#include <string.h>
-
-/* SphinxBase headers. */
-#include <sphinxbase/logmath.h>
-#include <sphinxbase/err.h>
-#include <sphinxbase/ckd_alloc.h>
-#include <sphinxbase/bio.h>
-
-/* Local headers. */
-#include "tmat.h"
-#include "hmm.h"
-#include "vector.h"
-
-#define TMAT_PARAM_VERSION "1.0"
-
-
-/**
- * Checks that no transition matrix in the given object contains backward arcs.
- * @returns 0 if successful, -1 if check failed.
- */
-static int32 tmat_chk_uppertri(tmat_t *tmat, logmath_t *lmath);
-
-
-/**
- * Checks that transition matrix arcs in the given object skip over
- * at most 1 state.
- * @returns 0 if successful, -1 if check failed.
- */
-
-static int32 tmat_chk_1skip(tmat_t *tmat, logmath_t *lmath);
-
-
-void
-tmat_dump(tmat_t * tmat, FILE * fp)
-{
- int32 i, src, dst;
-
- for (i = 0; i < tmat->n_tmat; i++) {
- fprintf(fp, "TMAT %d = %d x %d\n", i, tmat->n_state,
- tmat->n_state + 1);
- for (src = 0; src < tmat->n_state; src++) {
- for (dst = 0; dst <= tmat->n_state; dst++)
- fprintf(fp, " %12d", tmat->tp[i][src][dst]);
- fprintf(fp, "\n");
- }
- fprintf(fp, "\n");
- }
- fflush(fp);
-}
-
-
-/*
- * Check model tprob matrices that they conform to upper-triangular assumption;
- * i.e. no "backward" transitions allowed.
- */
-int32
-tmat_chk_uppertri(tmat_t * tmat, logmath_t *lmath)
-{
- int32 i, src, dst;
-
- /* Check that each tmat is upper-triangular */
- for (i = 0; i < tmat->n_tmat; i++) {
- for (dst = 0; dst < tmat->n_state; dst++)
- for (src = dst + 1; src < tmat->n_state; src++)
- if (tmat->tp[i][src][dst] < 255) {
- E_ERROR("tmat[%d][%d][%d] = %d\n",
- i, src, dst, tmat->tp[i][src][dst]);
- return -1;
- }
- }
-
- return 0;
-}
-
-
-int32
-tmat_chk_1skip(tmat_t * tmat, logmath_t *lmath)
-{
- int32 i, src, dst;
-
- for (i = 0; i < tmat->n_tmat; i++) {
- for (src = 0; src < tmat->n_state; src++)
- for (dst = src + 3; dst <= tmat->n_state; dst++)
- if (tmat->tp[i][src][dst] < 255) {
- E_ERROR("tmat[%d][%d][%d] = %d\n",
- i, src, dst, tmat->tp[i][src][dst]);
- return -1;
- }
- }
-
- return 0;
-}
-
-
-tmat_t *
-tmat_init(char const *file_name, logmath_t *lmath, float64 tpfloor, int32 breport)
-{
- char tmp;
- int32 n_src, n_dst, n_tmat;
- FILE *fp;
- int32 byteswap, chksum_present;
- uint32 chksum;
- float32 **tp;
- int32 i, j, k, tp_per_tmat;
- char **argname, **argval;
- tmat_t *t;
-
-
- if (breport) {
- E_INFO("Reading HMM transition probability matrices: %s\n",
- file_name);
- }
-
- t = (tmat_t *) ckd_calloc(1, sizeof(tmat_t));
-
- if ((fp = fopen(file_name, "rb")) == NULL)
- E_FATAL_SYSTEM("Failed to open transition file '%s' for reading", file_name);
-
- /* Read header, including argument-value info and 32-bit byteorder magic */
- if (bio_readhdr(fp, &argname, &argval, &byteswap) < 0)
- E_FATAL("Failed to read header from file '%s'\n", file_name);
-
- /* Parse argument-value list */
- chksum_present = 0;
- for (i = 0; argname[i]; i++) {
- if (strcmp(argname[i], "version") == 0) {
- if (strcmp(argval[i], TMAT_PARAM_VERSION) != 0)
- E_WARN("Version mismatch(%s): %s, expecting %s\n",
- file_name, argval[i], TMAT_PARAM_VERSION);
- }
- else if (strcmp(argname[i], "chksum0") == 0) {
- chksum_present = 1; /* Ignore the associated value */
- }
- }
- bio_hdrarg_free(argname, argval);
- argname = argval = NULL;
-
- chksum = 0;
-
- /* Read #tmat, #from-states, #to-states, arraysize */
- if ((bio_fread(&n_tmat, sizeof(int32), 1, fp, byteswap, &chksum)
- != 1)
- || (bio_fread(&n_src, sizeof(int32), 1, fp, byteswap, &chksum) !=
- 1)
- || (bio_fread(&n_dst, sizeof(int32), 1, fp, byteswap, &chksum) !=
- 1)
- || (bio_fread(&i, sizeof(int32), 1, fp, byteswap, &chksum) != 1)) {
- E_FATAL("Failed to read header from '%s'\n", file_name);
- }
- if (n_tmat >= MAX_INT16)
- E_FATAL("%s: Number of transition matrices (%d) exceeds limit (%d)\n", file_name,
- n_tmat, MAX_INT16);
- t->n_tmat = n_tmat;
-
- if (n_dst != n_src + 1)
- E_FATAL("%s: Unsupported transition matrix. Number of source states (%d) != number of target states (%d)-1\n", file_name,
- n_src, n_dst);
- t->n_state = n_src;
-
- if (i != t->n_tmat * n_src * n_dst) {
- E_FATAL
- ("%s: Invalid transitions. Number of coefficients (%d) doesn't match expected array dimension: %d x %d x %d\n",
- file_name, i, t->n_tmat, n_src, n_dst);
- }
-
- /* Allocate memory for tmat data */
- t->tp = ckd_calloc_3d(t->n_tmat, n_src, n_dst, sizeof(***t->tp));
-
- /* Temporary structure to read in the float data */
- tp = ckd_calloc_2d(n_src, n_dst, sizeof(**tp));
-
- /* Read transition matrices, normalize and floor them, and convert to log domain */
- tp_per_tmat = n_src * n_dst;
- for (i = 0; i < t->n_tmat; i++) {
- if (bio_fread(tp[0], sizeof(float32), tp_per_tmat, fp,
- byteswap, &chksum) != tp_per_tmat) {
- E_FATAL("Failed to read transition matrix %d from '%s'\n", i, file_name);
- }
-
- /* Normalize and floor */
- for (j = 0; j < n_src; j++) {
- if (vector_sum_norm(tp[j], n_dst) == 0.0)
- E_WARN("Normalization failed for transition matrix %d from state %d\n",
- i, j);
- vector_nz_floor(tp[j], n_dst, tpfloor);
- vector_sum_norm(tp[j], n_dst);
-
- /* Convert to logs3. */
- for (k = 0; k < n_dst; k++) {
- int ltp;
-#if 0 /* No, don't do this! It will subtly break 3-state HMMs. */
- /* For these ones, we floor them even if they are
- * zero, otherwise HMM evaluation goes nuts. */
- if (k >= j && k-j < 3 && tp[j][k] == 0.0f)
- tp[j][k] = tpfloor;
-#endif
- /* Log and quantize them. */
- ltp = -logmath_log(lmath, tp[j][k]) >> SENSCR_SHIFT;
- if (ltp > 255) ltp = 255;
- t->tp[i][j][k] = (uint8)ltp;
- }
- }
- }
-
- ckd_free_2d(tp);
-
- if (chksum_present)
- bio_verify_chksum(fp, byteswap, chksum);
-
- if (fread(&tmp, 1, 1, fp) == 1)
- E_ERROR("Non-empty file beyond end of data\n");
-
- fclose(fp);
-
- if (tmat_chk_uppertri(t, lmath) < 0)
- E_FATAL("Tmat not upper triangular\n");
- if (tmat_chk_1skip(t, lmath) < 0)
- E_FATAL("Topology not Left-to-Right or Bakis\n");
-
- return t;
-}
-
-void
-tmat_report(tmat_t * t)
-{
- E_INFO_NOFN("Initialization of tmat_t, report:\n");
- E_INFO_NOFN("Read %d transition matrices of size %dx%d\n",
- t->n_tmat, t->n_state, t->n_state + 1);
- E_INFO_NOFN("\n");
-
-}
-
-/*
- * RAH, Free memory allocated in tmat_init ()
- */
-void
-tmat_free(tmat_t * t)
-{
- if (t) {
- if (t->tp)
- ckd_free_3d(t->tp);
- ckd_free(t);
- }
-}
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