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/* -*- c-basic-offset: 4; indent-tabs-mode: nil -*- */
/* ====================================================================
* Copyright (c) 2009 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 ps_mllr.c Model-space linear transforms for speaker adaptation
*/
/* System headers. */
#include <stdio.h>
/* SphinxBase headers. */
#include <sphinxbase/ckd_alloc.h>
/* Local headers. */
#include "acmod.h"
ps_mllr_t *
ps_mllr_read(char const *regmatfile)
{
ps_mllr_t *mllr;
FILE *fp;
int n, i, m, j, k;
mllr = ckd_calloc(1, sizeof(*mllr));
mllr->refcnt = 1;
if ((fp = fopen(regmatfile, "r")) == NULL) {
E_ERROR_SYSTEM("Failed to open MLLR file '%s' for reading", regmatfile);
goto error_out;
}
else
E_INFO("Reading MLLR transformation file '%s'\n", regmatfile);
if ((fscanf(fp, "%d", &n) != 1) || (n < 1)) {
E_ERROR("Failed to read number of MLLR classes\n");
goto error_out;
}
mllr->n_class = n;
if ((fscanf(fp, "%d", &n) != 1)) {
E_ERROR("Failed to read number of feature streams\n");
goto error_out;
}
mllr->n_feat = n;
mllr->veclen = ckd_calloc(mllr->n_feat, sizeof(*mllr->veclen));
mllr->A = (float32 ****) ckd_calloc(mllr->n_feat, sizeof(float32 **));
mllr->b = (float32 ***) ckd_calloc(mllr->n_feat, sizeof(float32 *));
mllr->h = (float32 ***) ckd_calloc(mllr->n_feat, sizeof(float32 *));
for (i = 0; i < mllr->n_feat; ++i) {
if (fscanf(fp, "%d", &n) != 1) {
E_ERROR("Failed to read stream length for feature %d\n", i);
goto error_out;
}
mllr->veclen[i] = n;
mllr->A[i] =
(float32 ***) ckd_calloc_3d(mllr->n_class, mllr->veclen[i],
mllr->veclen[i], sizeof(float32));
mllr->b[i] =
(float32 **) ckd_calloc_2d(mllr->n_class, mllr->veclen[i],
sizeof(float32));
mllr->h[i] =
(float32 **) ckd_calloc_2d(mllr->n_class, mllr->veclen[i],
sizeof(float32));
for (m = 0; m < mllr->n_class; ++m) {
for (j = 0; j < mllr->veclen[i]; ++j) {
for (k = 0; k < mllr->veclen[i]; ++k) {
if (fscanf(fp, "%f ", &mllr->A[i][m][j][k]) != 1) {
E_ERROR("Failed reading MLLR rotation (%d,%d,%d,%d)\n",
i, m, j, k);
goto error_out;
}
}
}
for (j = 0; j < mllr->veclen[i]; ++j) {
if (fscanf(fp, "%f ", &mllr->b[i][m][j]) != 1) {
E_ERROR("Failed reading MLLR bias (%d,%d,%d)\n",
i, m, j);
goto error_out;
}
}
for (j = 0; j < mllr->veclen[i]; ++j) {
if (fscanf(fp, "%f ", &mllr->h[i][m][j]) != 1) {
E_ERROR("Failed reading MLLR variance scale (%d,%d,%d)\n",
i, m, j);
goto error_out;
}
}
}
}
fclose(fp);
return mllr;
error_out:
if (fp)
fclose(fp);
ps_mllr_free(mllr);
return NULL;
}
ps_mllr_t *
ps_mllr_retain(ps_mllr_t *mllr)
{
++mllr->refcnt;
return mllr;
}
int
ps_mllr_free(ps_mllr_t *mllr)
{
int i;
if (mllr == NULL)
return 0;
if (--mllr->refcnt > 0)
return mllr->refcnt;
for (i = 0; i < mllr->n_feat; ++i) {
if (mllr->A)
ckd_free_3d(mllr->A[i]);
if (mllr->b)
ckd_free_2d(mllr->b[i]);
if (mllr->h)
ckd_free_2d(mllr->h[i]);
}
ckd_free(mllr->veclen);
ckd_free(mllr->A);
ckd_free(mllr->b);
ckd_free(mllr->h);
ckd_free(mllr);
return 0;
}
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