diff options
Diffstat (limited to 'media/pocketsphinx/src/ps_mllr.c')
| -rw-r--r-- | media/pocketsphinx/src/ps_mllr.c | 169 |
1 files changed, 169 insertions, 0 deletions
diff --git a/media/pocketsphinx/src/ps_mllr.c b/media/pocketsphinx/src/ps_mllr.c new file mode 100644 index 000000000..b43f6fbdb --- /dev/null +++ b/media/pocketsphinx/src/ps_mllr.c @@ -0,0 +1,169 @@ +/* -*- 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; +} |