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src/libsphinxbase/lm/ngram_model_dmp32.c

00001 /* -*- c-basic-offset: 4; indent-tabs-mode: nil -*- */
00002 /* ====================================================================
00003  * Copyright (c) 1999-2007 Carnegie Mellon University.  All rights
00004  * reserved.
00005  *
00006  * Redistribution and use in source and binary forms, with or without
00007  * modification, are permitted provided that the following conditions
00008  * are met:
00009  *
00010  * 1. Redistributions of source code must retain the above copyright
00011  *    notice, this list of conditions and the following disclaimer. 
00012  *
00013  * 2. Redistributions in binary form must reproduce the above copyright
00014  *    notice, this list of conditions and the following disclaimer in
00015  *    the documentation and/or other materials provided with the
00016  *    distribution.
00017  *
00018  * This work was supported in part by funding from the Defense Advanced 
00019  * Research Projects Agency and the National Science Foundation of the 
00020  * United States of America, and the CMU Sphinx Speech Consortium.
00021  *
00022  * THIS SOFTWARE IS PROVIDED BY CARNEGIE MELLON UNIVERSITY ``AS IS'' AND 
00023  * ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 
00024  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
00025  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY
00026  * NOR ITS EMPLOYEES BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
00027  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 
00028  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 
00029  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 
00030  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 
00031  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 
00032  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
00033  *
00034  * ====================================================================
00035  *
00036  */
00037 /*
00038  * \file ngram_model_dmp32.c DMP32 format language models
00039  *
00040  * Author: David Huggins-Daines <dhuggins@cs.cmu.edu>
00041  */
00042 
00043 #include "ckd_alloc.h"
00044 #include "ngram_model_internal.h"
00045 
00046 static ngram_funcs_t ngram_model_dmp32_funcs;
00047 
00048 ngram_model_t *
00049 ngram_model_dmp32_read(cmd_ln_t *config,
00050                        const char *file_name,
00051                        logmath_t *lmath)
00052 {
00053     ngram_model_t *model;
00054 
00055     model = ckd_calloc(1, sizeof(*model));
00056     model->funcs = &ngram_model_dmp32_funcs;
00057     return model;
00058 }
00059 
00060 int
00061 ngram_model_dmp32_write(ngram_model_t *model,
00062                         const char *file_name)
00063 {
00064     return -1;
00065 }
00066 
00067 static int
00068 ngram_model_dmp32_apply_weights(ngram_model_t *model, float32 lw,
00069                               float32 wip, float32 uw)
00070 {
00071     return 0;
00072 }
00073 
00074 static int32
00075 ngram_model_dmp32_score(ngram_model_t *model, int32 wid,
00076                         int32 *history, int32 n_hist,
00077                         int32 *n_used)
00078 {
00079     return model->log_zero;
00080 }
00081 
00082 static int32
00083 ngram_model_dmp32_raw_score(ngram_model_t *model, int32 wid,
00084                             int32 *history, int32 n_hist,
00085                             int32 *n_used)
00086 {
00087     return model->log_zero;
00088 }
00089 
00090 static void
00091 ngram_model_dmp32_free(ngram_model_t *base)
00092 {
00093     ckd_free(base);
00094 }
00095 
00096 static ngram_funcs_t ngram_model_dmp32_funcs = {
00097     ngram_model_dmp32_free,          /* free */
00098     ngram_model_dmp32_apply_weights, /* apply_weights */
00099     ngram_model_dmp32_score,         /* score */
00100     ngram_model_dmp32_raw_score,     /* raw_score */
00101     NULL                             /* add_ug */
00102 };

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