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<h1>src/libpocketsphinx/ngram_search_fwdflat.c</h1> </div>
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<a href="ngram__search__fwdflat_8c.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/* -*- c-basic-offset: 4; indent-tabs-mode: nil -*- */</span>
<a name="l00002"></a>00002 <span class="comment">/* ====================================================================</span>
<a name="l00003"></a>00003 <span class="comment"> * Copyright (c) 2008 Carnegie Mellon University. All rights</span>
<a name="l00004"></a>00004 <span class="comment"> * reserved.</span>
<a name="l00005"></a>00005 <span class="comment"> *</span>
<a name="l00006"></a>00006 <span class="comment"> * Redistribution and use in source and binary forms, with or without</span>
<a name="l00007"></a>00007 <span class="comment"> * modification, are permitted provided that the following conditions</span>
<a name="l00008"></a>00008 <span class="comment"> * are met:</span>
<a name="l00009"></a>00009 <span class="comment"> *</span>
<a name="l00010"></a>00010 <span class="comment"> * 1. Redistributions of source code must retain the above copyright</span>
<a name="l00011"></a>00011 <span class="comment"> * notice, this list of conditions and the following disclaimer. </span>
<a name="l00012"></a>00012 <span class="comment"> *</span>
<a name="l00013"></a>00013 <span class="comment"> * 2. Redistributions in binary form must reproduce the above copyright</span>
<a name="l00014"></a>00014 <span class="comment"> * notice, this list of conditions and the following disclaimer in</span>
<a name="l00015"></a>00015 <span class="comment"> * the documentation and/or other materials provided with the</span>
<a name="l00016"></a>00016 <span class="comment"> * distribution.</span>
<a name="l00017"></a>00017 <span class="comment"> *</span>
<a name="l00018"></a>00018 <span class="comment"> * This work was supported in part by funding from the Defense Advanced </span>
<a name="l00019"></a>00019 <span class="comment"> * Research Projects Agency and the National Science Foundation of the </span>
<a name="l00020"></a>00020 <span class="comment"> * United States of America, and the CMU Sphinx Speech Consortium.</span>
<a name="l00021"></a>00021 <span class="comment"> *</span>
<a name="l00022"></a>00022 <span class="comment"> * THIS SOFTWARE IS PROVIDED BY CARNEGIE MELLON UNIVERSITY ``AS IS'' AND </span>
<a name="l00023"></a>00023 <span class="comment"> * ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, </span>
<a name="l00024"></a>00024 <span class="comment"> * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR</span>
<a name="l00025"></a>00025 <span class="comment"> * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY</span>
<a name="l00026"></a>00026 <span class="comment"> * NOR ITS EMPLOYEES BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,</span>
<a name="l00027"></a>00027 <span class="comment"> * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT </span>
<a name="l00028"></a>00028 <span class="comment"> * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, </span>
<a name="l00029"></a>00029 <span class="comment"> * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY </span>
<a name="l00030"></a>00030 <span class="comment"> * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT </span>
<a name="l00031"></a>00031 <span class="comment"> * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE </span>
<a name="l00032"></a>00032 <span class="comment"> * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.</span>
<a name="l00033"></a>00033 <span class="comment"> *</span>
<a name="l00034"></a>00034 <span class="comment"> * ====================================================================</span>
<a name="l00035"></a>00035 <span class="comment"> *</span>
<a name="l00036"></a>00036 <span class="comment"> */</span>
<a name="l00037"></a>00037
<a name="l00042"></a>00042 <span class="comment">/* System headers. */</span>
<a name="l00043"></a>00043 <span class="preprocessor">#include <string.h></span>
<a name="l00044"></a>00044 <span class="preprocessor">#include <assert.h></span>
<a name="l00045"></a>00045
<a name="l00046"></a>00046 <span class="comment">/* SphinxBase headers. */</span>
<a name="l00047"></a>00047 <span class="preprocessor">#include <sphinxbase/ckd_alloc.h></span>
<a name="l00048"></a>00048 <span class="preprocessor">#include <sphinxbase/listelem_alloc.h></span>
<a name="l00049"></a>00049 <span class="preprocessor">#include <sphinxbase/err.h></span>
<a name="l00050"></a>00050
<a name="l00051"></a>00051 <span class="comment">/* Local headers. */</span>
<a name="l00052"></a>00052 <span class="preprocessor">#include "<a class="code" href="ngram__search_8h.html" title="N-Gram based multi-pass search (&quot;FBS&quot;)">ngram_search.h</a>"</span>
<a name="l00053"></a>00053 <span class="preprocessor">#include "<a class="code" href="ps__lattice__internal_8h.html" title="Word graph search implementation.">ps_lattice_internal.h</a>"</span>
<a name="l00054"></a>00054
<a name="l00055"></a>00055 <span class="comment">/* Turn this on to dump channels for debugging */</span>
<a name="l00056"></a>00056 <span class="preprocessor">#define __CHAN_DUMP__ 0</span>
<a name="l00057"></a>00057 <span class="preprocessor"></span><span class="preprocessor">#if __CHAN_DUMP__</span>
<a name="l00058"></a>00058 <span class="preprocessor"></span><span class="preprocessor">#define chan_v_eval(chan) hmm_dump_vit_eval(&(chan)->hmm, stderr)</span>
<a name="l00059"></a>00059 <span class="preprocessor"></span><span class="preprocessor">#else</span>
<a name="l00060"></a>00060 <span class="preprocessor"></span><span class="preprocessor">#define chan_v_eval(chan) hmm_vit_eval(&(chan)->hmm)</span>
<a name="l00061"></a>00061 <span class="preprocessor"></span><span class="preprocessor">#endif</span>
<a name="l00062"></a>00062 <span class="preprocessor"></span>
<a name="l00063"></a>00063 <span class="keyword">static</span> <span class="keywordtype">void</span>
<a name="l00064"></a>00064 ngram_fwdflat_expand_all(<a class="code" href="structngram__search__s.html" title="N-Gram search module structure.">ngram_search_t</a> *ngs)
<a name="l00065"></a>00065 {
<a name="l00066"></a>00066 <span class="keywordtype">int</span> n_words, i;
<a name="l00067"></a>00067
<a name="l00068"></a>00068 <span class="comment">/* For all "real words" (not fillers or <s>/</s>) in the dictionary,</span>
<a name="l00069"></a>00069 <span class="comment"> *</span>
<a name="l00070"></a>00070 <span class="comment"> * 1) Add the ones which are in the LM to the fwdflat wordlist</span>
<a name="l00071"></a>00071 <span class="comment"> * 2) And to the expansion list (since we are expanding all)</span>
<a name="l00072"></a>00072 <span class="comment"> */</span>
<a name="l00073"></a>00073 ngs->n_expand_words = 0;
<a name="l00074"></a>00074 n_words = ps_search_n_words(ngs);
<a name="l00075"></a>00075 bitvec_clear_all(ngs->expand_word_flag, ps_search_n_words(ngs));
<a name="l00076"></a>00076 <span class="keywordflow">for</span> (i = 0; i < n_words; ++i) {
<a name="l00077"></a>00077 <span class="keywordflow">if</span> (!ngram_model_set_known_wid(ngs-><a class="code" href="structngram__search__s.html#a6127a6d8fb53832e67456c11aa6ad9c4" title="Set of language models.">lmset</a>,
<a name="l00078"></a>00078 dict_basewid(ps_search_dict(ngs),i)))
<a name="l00079"></a>00079 <span class="keywordflow">continue</span>;
<a name="l00080"></a>00080 ngs-><a class="code" href="structngram__search__s.html#a774f1640c5ece856f4bef98d98e7c959" title="List of active word IDs for utterance.">fwdflat_wordlist</a>[ngs->n_expand_words] = i;
<a name="l00081"></a>00081 ngs->expand_word_list[ngs->n_expand_words] = i;
<a name="l00082"></a>00082 bitvec_set(ngs->expand_word_flag, i);
<a name="l00083"></a>00083 ngs->n_expand_words++;
<a name="l00084"></a>00084 }
<a name="l00085"></a>00085 E_INFO(<span class="stringliteral">"Utterance vocabulary contains %d words\n"</span>, ngs->n_expand_words);
<a name="l00086"></a>00086 ngs->expand_word_list[ngs->n_expand_words] = -1;
<a name="l00087"></a>00087 ngs-><a class="code" href="structngram__search__s.html#a774f1640c5ece856f4bef98d98e7c959" title="List of active word IDs for utterance.">fwdflat_wordlist</a>[ngs->n_expand_words] = -1;
<a name="l00088"></a>00088 }
<a name="l00089"></a>00089
<a name="l00090"></a>00090 <span class="keyword">static</span> <span class="keywordtype">void</span>
<a name="l00091"></a>00091 ngram_fwdflat_allocate_1ph(<a class="code" href="structngram__search__s.html" title="N-Gram search module structure.">ngram_search_t</a> *ngs)
<a name="l00092"></a>00092 {
<a name="l00093"></a>00093 <a class="code" href="structdict__t.html" title="a structure for a dictionary.">dict_t</a> *dict = ps_search_dict(ngs);
<a name="l00094"></a>00094 <span class="keywordtype">int</span> n_words = ps_search_n_words(ngs);
<a name="l00095"></a>00095 <span class="keywordtype">int</span> i, w;
<a name="l00096"></a>00096
<a name="l00097"></a>00097 <span class="comment">/* Allocate single-phone words, since they won't have</span>
<a name="l00098"></a>00098 <span class="comment"> * been allocated for us by fwdtree initialization. */</span>
<a name="l00099"></a>00099 ngs-><a class="code" href="structngram__search__s.html#a9168184c862d6f63bd7926e6581b25d9" title="Number single phone words in dict (total)">n_1ph_words</a> = 0;
<a name="l00100"></a>00100 <span class="keywordflow">for</span> (w = 0; w < n_words; w++) {
<a name="l00101"></a>00101 <span class="keywordflow">if</span> (dict_is_single_phone(dict, w))
<a name="l00102"></a>00102 ++ngs-><a class="code" href="structngram__search__s.html#a9168184c862d6f63bd7926e6581b25d9" title="Number single phone words in dict (total)">n_1ph_words</a>;
<a name="l00103"></a>00103 }
<a name="l00104"></a>00104 ngs-><a class="code" href="structngram__search__s.html#a1157923e0060b947e05caa819c8abe2c" title="list of single-phone word ids">single_phone_wid</a> = ckd_calloc(ngs-><a class="code" href="structngram__search__s.html#a9168184c862d6f63bd7926e6581b25d9" title="Number single phone words in dict (total)">n_1ph_words</a>,
<a name="l00105"></a>00105 <span class="keyword">sizeof</span>(*ngs-><a class="code" href="structngram__search__s.html#a1157923e0060b947e05caa819c8abe2c" title="list of single-phone word ids">single_phone_wid</a>));
<a name="l00106"></a>00106 ngs-><a class="code" href="structngram__search__s.html#a1ffa3c9100252122ae8a2a713c50b527" title="Root HMMs for single-phone words.">rhmm_1ph</a> = ckd_calloc(ngs-><a class="code" href="structngram__search__s.html#a9168184c862d6f63bd7926e6581b25d9" title="Number single phone words in dict (total)">n_1ph_words</a>, <span class="keyword">sizeof</span>(*ngs-><a class="code" href="structngram__search__s.html#a1ffa3c9100252122ae8a2a713c50b527" title="Root HMMs for single-phone words.">rhmm_1ph</a>));
<a name="l00107"></a>00107 i = 0;
<a name="l00108"></a>00108 <span class="keywordflow">for</span> (w = 0; w < n_words; w++) {
<a name="l00109"></a>00109 <span class="keywordflow">if</span> (!dict_is_single_phone(dict, w))
<a name="l00110"></a>00110 <span class="keywordflow">continue</span>;
<a name="l00111"></a>00111
<a name="l00112"></a>00112 <span class="comment">/* DICT2PID location */</span>
<a name="l00113"></a>00113 ngs-><a class="code" href="structngram__search__s.html#a1ffa3c9100252122ae8a2a713c50b527" title="Root HMMs for single-phone words.">rhmm_1ph</a>[i].<a class="code" href="structroot__chan__s.html#ad67c37bf4183f518acd7760c09a806f6" title="first ciphone of this node; all words rooted at this node begin with this ciphone">ciphone</a> = dict_first_phone(dict, w);
<a name="l00114"></a>00114 ngs-><a class="code" href="structngram__search__s.html#a1ffa3c9100252122ae8a2a713c50b527" title="Root HMMs for single-phone words.">rhmm_1ph</a>[i].<a class="code" href="structroot__chan__s.html#a0c0cf22caf4c97879af86865764f1675" title="second ciphone of this node; one root HMM for each unique right context">ci2phone</a> = bin_mdef_silphone(ps_search_acmod(ngs)->mdef);
<a name="l00115"></a>00115 hmm_init(ngs-><a class="code" href="structngram__search__s.html#acfbdd34e3dadbaa384818402f1dd59bf" title="HMM context.">hmmctx</a>, &ngs-><a class="code" href="structngram__search__s.html#a1ffa3c9100252122ae8a2a713c50b527" title="Root HMMs for single-phone words.">rhmm_1ph</a>[i].<a class="code" href="structroot__chan__s.html#a9d4d92ffa8b4079202ddebe3ba0eb290" title="Basic HMM structure.">hmm</a>, TRUE,
<a name="l00116"></a>00116 <span class="comment">/* ssid */</span> bin_mdef_pid2ssid(ps_search_acmod(ngs)->mdef,
<a name="l00117"></a>00117 ngs-><a class="code" href="structngram__search__s.html#a1ffa3c9100252122ae8a2a713c50b527" title="Root HMMs for single-phone words.">rhmm_1ph</a>[i].<a class="code" href="structroot__chan__s.html#ad67c37bf4183f518acd7760c09a806f6" title="first ciphone of this node; all words rooted at this node begin with this ciphone">ciphone</a>),
<a name="l00118"></a>00118 <span class="comment">/* tmatid */</span> bin_mdef_pid2tmatid(ps_search_acmod(ngs)->mdef,
<a name="l00119"></a>00119 ngs-><a class="code" href="structngram__search__s.html#a1ffa3c9100252122ae8a2a713c50b527" title="Root HMMs for single-phone words.">rhmm_1ph</a>[i].<a class="code" href="structroot__chan__s.html#ad67c37bf4183f518acd7760c09a806f6" title="first ciphone of this node; all words rooted at this node begin with this ciphone">ciphone</a>));
<a name="l00120"></a>00120 ngs-><a class="code" href="structngram__search__s.html#a1ffa3c9100252122ae8a2a713c50b527" title="Root HMMs for single-phone words.">rhmm_1ph</a>[i].<a class="code" href="structroot__chan__s.html#ae0f0b90a7cb2fcb54cd7b30502dd497e" title="first descendant of this channel">next</a> = NULL;
<a name="l00121"></a>00121 ngs-><a class="code" href="structngram__search__s.html#a79deb7295a261cd82d2a6b48cb119e77" title="Channels associated with a given word (only used for right contexts, single-phone words in fwdtree se...">word_chan</a>[w] = (<a class="code" href="structchan__s.html" title="Lexical tree node data type.">chan_t</a> *) &(ngs-><a class="code" href="structngram__search__s.html#a1ffa3c9100252122ae8a2a713c50b527" title="Root HMMs for single-phone words.">rhmm_1ph</a>[i]);
<a name="l00122"></a>00122 ngs-><a class="code" href="structngram__search__s.html#a1157923e0060b947e05caa819c8abe2c" title="list of single-phone word ids">single_phone_wid</a>[i] = w;
<a name="l00123"></a>00123 i++;
<a name="l00124"></a>00124 }
<a name="l00125"></a>00125 }
<a name="l00126"></a>00126
<a name="l00127"></a>00127 <span class="keyword">static</span> <span class="keywordtype">void</span>
<a name="l00128"></a>00128 ngram_fwdflat_free_1ph(<a class="code" href="structngram__search__s.html" title="N-Gram search module structure.">ngram_search_t</a> *ngs)
<a name="l00129"></a>00129 {
<a name="l00130"></a>00130 <span class="keywordtype">int</span> i, w;
<a name="l00131"></a>00131 <span class="keywordtype">int</span> n_words = ps_search_n_words(ngs);
<a name="l00132"></a>00132
<a name="l00133"></a>00133 <span class="keywordflow">for</span> (i = w = 0; w < n_words; ++w) {
<a name="l00134"></a>00134 <span class="keywordflow">if</span> (!dict_is_single_phone(ps_search_dict(ngs), w))
<a name="l00135"></a>00135 <span class="keywordflow">continue</span>;
<a name="l00136"></a>00136 hmm_deinit(&ngs-><a class="code" href="structngram__search__s.html#a1ffa3c9100252122ae8a2a713c50b527" title="Root HMMs for single-phone words.">rhmm_1ph</a>[i].<a class="code" href="structroot__chan__s.html#a9d4d92ffa8b4079202ddebe3ba0eb290" title="Basic HMM structure.">hmm</a>);
<a name="l00137"></a>00137 ++i;
<a name="l00138"></a>00138 }
<a name="l00139"></a>00139 ckd_free(ngs-><a class="code" href="structngram__search__s.html#a1ffa3c9100252122ae8a2a713c50b527" title="Root HMMs for single-phone words.">rhmm_1ph</a>);
<a name="l00140"></a>00140 ngs-><a class="code" href="structngram__search__s.html#a1ffa3c9100252122ae8a2a713c50b527" title="Root HMMs for single-phone words.">rhmm_1ph</a> = NULL;
<a name="l00141"></a>00141 ckd_free(ngs-><a class="code" href="structngram__search__s.html#a1157923e0060b947e05caa819c8abe2c" title="list of single-phone word ids">single_phone_wid</a>);
<a name="l00142"></a>00142 }
<a name="l00143"></a>00143
<a name="l00144"></a>00144 <span class="keywordtype">void</span>
<a name="l00145"></a><a class="code" href="ngram__search__fwdflat_8h.html#ad4b8ebd904c77f8a28f59cd5ca2c8307">00145</a> <a class="code" href="ngram__search__fwdflat_8c.html#ad4b8ebd904c77f8a28f59cd5ca2c8307" title="Initialize N-Gram search for fwdflat decoding.">ngram_fwdflat_init</a>(<a class="code" href="structngram__search__s.html" title="N-Gram search module structure.">ngram_search_t</a> *ngs)
<a name="l00146"></a>00146 {
<a name="l00147"></a>00147 <span class="keywordtype">int</span> n_words;
<a name="l00148"></a>00148
<a name="l00149"></a>00149 n_words = ps_search_n_words(ngs);
<a name="l00150"></a>00150 ngs-><a class="code" href="structngram__search__s.html#a774f1640c5ece856f4bef98d98e7c959" title="List of active word IDs for utterance.">fwdflat_wordlist</a> = ckd_calloc(n_words + 1, <span class="keyword">sizeof</span>(*ngs-><a class="code" href="structngram__search__s.html#a774f1640c5ece856f4bef98d98e7c959" title="List of active word IDs for utterance.">fwdflat_wordlist</a>));
<a name="l00151"></a>00151 ngs->expand_word_flag = bitvec_alloc(n_words);
<a name="l00152"></a>00152 ngs->expand_word_list = ckd_calloc(n_words + 1, <span class="keyword">sizeof</span>(*ngs->expand_word_list));
<a name="l00153"></a>00153 ngs-><a class="code" href="structngram__search__s.html#aa54544457c363ccccb87fc7ec63a5f3e" title="List of active words in each frame.">frm_wordlist</a> = ckd_calloc(ngs-><a class="code" href="structngram__search__s.html#a38ea5de504b3d7ad2390a3f8966d502f" title="Number of frames allocated in bp_table_idx and friends.">n_frame_alloc</a>, <span class="keyword">sizeof</span>(*ngs-><a class="code" href="structngram__search__s.html#aa54544457c363ccccb87fc7ec63a5f3e" title="List of active words in each frame.">frm_wordlist</a>));
<a name="l00154"></a>00154 ngs->min_ef_width = cmd_ln_int32_r(ps_search_config(ngs), <span class="stringliteral">"-fwdflatefwid"</span>);
<a name="l00155"></a>00155 ngs->max_sf_win = cmd_ln_int32_r(ps_search_config(ngs), <span class="stringliteral">"-fwdflatsfwin"</span>);
<a name="l00156"></a>00156 E_INFO(<span class="stringliteral">"fwdflat: min_ef_width = %d, max_sf_win = %d\n"</span>,
<a name="l00157"></a>00157 ngs->min_ef_width, ngs->max_sf_win);
<a name="l00158"></a>00158
<a name="l00159"></a>00159 <span class="comment">/* No tree-search; pre-build the expansion list, including all LM words. */</span>
<a name="l00160"></a>00160 <span class="keywordflow">if</span> (!ngs->fwdtree) {
<a name="l00161"></a>00161 <span class="comment">/* Build full expansion list from LM words. */</span>
<a name="l00162"></a>00162 ngram_fwdflat_expand_all(ngs);
<a name="l00163"></a>00163 <span class="comment">/* Allocate single phone words. */</span>
<a name="l00164"></a>00164 ngram_fwdflat_allocate_1ph(ngs);
<a name="l00165"></a>00165 }
<a name="l00166"></a>00166 }
<a name="l00167"></a>00167
<a name="l00168"></a>00168 <span class="keywordtype">void</span>
<a name="l00169"></a><a class="code" href="ngram__search__fwdflat_8h.html#a8faf467f90162a7273b23304fc6e8586">00169</a> <a class="code" href="ngram__search__fwdflat_8c.html#a8faf467f90162a7273b23304fc6e8586" title="Release memory associated with fwdflat decoding.">ngram_fwdflat_deinit</a>(<a class="code" href="structngram__search__s.html" title="N-Gram search module structure.">ngram_search_t</a> *ngs)
<a name="l00170"></a>00170 {
<a name="l00171"></a>00171 <span class="keywordtype">double</span> n_speech = (double)ngs->n_tot_frame
<a name="l00172"></a>00172 / cmd_ln_int32_r(ps_search_config(ngs), <span class="stringliteral">"-frate"</span>);
<a name="l00173"></a>00173
<a name="l00174"></a>00174 E_INFO(<span class="stringliteral">"TOTAL fwdflat %.2f CPU %.3f xRT\n"</span>,
<a name="l00175"></a>00175 ngs->fwdflat_perf.t_tot_cpu,
<a name="l00176"></a>00176 ngs->fwdflat_perf.t_tot_cpu / n_speech);
<a name="l00177"></a>00177 E_INFO(<span class="stringliteral">"TOTAL fwdflat %.2f wall %.3f xRT\n"</span>,
<a name="l00178"></a>00178 ngs->fwdflat_perf.t_tot_elapsed,
<a name="l00179"></a>00179 ngs->fwdflat_perf.t_tot_elapsed / n_speech);
<a name="l00180"></a>00180
<a name="l00181"></a>00181 <span class="comment">/* Free single-phone words if we allocated them. */</span>
<a name="l00182"></a>00182 <span class="keywordflow">if</span> (!ngs->fwdtree) {
<a name="l00183"></a>00183 ngram_fwdflat_free_1ph(ngs);
<a name="l00184"></a>00184 }
<a name="l00185"></a>00185 ckd_free(ngs-><a class="code" href="structngram__search__s.html#a774f1640c5ece856f4bef98d98e7c959" title="List of active word IDs for utterance.">fwdflat_wordlist</a>);
<a name="l00186"></a>00186 bitvec_free(ngs->expand_word_flag);
<a name="l00187"></a>00187 ckd_free(ngs->expand_word_list);
<a name="l00188"></a>00188 ckd_free(ngs-><a class="code" href="structngram__search__s.html#aa54544457c363ccccb87fc7ec63a5f3e" title="List of active words in each frame.">frm_wordlist</a>);
<a name="l00189"></a>00189 }
<a name="l00190"></a>00190
<a name="l00191"></a>00191 <span class="keywordtype">int</span>
<a name="l00192"></a><a class="code" href="ngram__search__fwdflat_8h.html#aa4879c06ddbc455a6f355084a9c574b4">00192</a> <a class="code" href="ngram__search__fwdflat_8c.html#aa4879c06ddbc455a6f355084a9c574b4" title="Rebuild search structures for updated language models.">ngram_fwdflat_reinit</a>(<a class="code" href="structngram__search__s.html" title="N-Gram search module structure.">ngram_search_t</a> *ngs)
<a name="l00193"></a>00193 {
<a name="l00194"></a>00194 <span class="comment">/* Reallocate things that depend on the number of words. */</span>
<a name="l00195"></a>00195 <span class="keywordtype">int</span> n_words;
<a name="l00196"></a>00196
<a name="l00197"></a>00197 ckd_free(ngs-><a class="code" href="structngram__search__s.html#a774f1640c5ece856f4bef98d98e7c959" title="List of active word IDs for utterance.">fwdflat_wordlist</a>);
<a name="l00198"></a>00198 ckd_free(ngs->expand_word_list);
<a name="l00199"></a>00199 bitvec_free(ngs->expand_word_flag);
<a name="l00200"></a>00200 n_words = ps_search_n_words(ngs);
<a name="l00201"></a>00201 ngs-><a class="code" href="structngram__search__s.html#a774f1640c5ece856f4bef98d98e7c959" title="List of active word IDs for utterance.">fwdflat_wordlist</a> = ckd_calloc(n_words + 1, <span class="keyword">sizeof</span>(*ngs-><a class="code" href="structngram__search__s.html#a774f1640c5ece856f4bef98d98e7c959" title="List of active word IDs for utterance.">fwdflat_wordlist</a>));
<a name="l00202"></a>00202 ngs->expand_word_flag = bitvec_alloc(n_words);
<a name="l00203"></a>00203 ngs->expand_word_list = ckd_calloc(n_words + 1, <span class="keyword">sizeof</span>(*ngs->expand_word_list));
<a name="l00204"></a>00204
<a name="l00205"></a>00205 <span class="comment">/* No tree-search; take care of the expansion list and single phone words. */</span>
<a name="l00206"></a>00206 <span class="keywordflow">if</span> (!ngs->fwdtree) {
<a name="l00207"></a>00207 <span class="comment">/* Free single-phone words. */</span>
<a name="l00208"></a>00208 ngram_fwdflat_free_1ph(ngs);
<a name="l00209"></a>00209 <span class="comment">/* Reallocate word_chan. */</span>
<a name="l00210"></a>00210 ckd_free(ngs-><a class="code" href="structngram__search__s.html#a79deb7295a261cd82d2a6b48cb119e77" title="Channels associated with a given word (only used for right contexts, single-phone words in fwdtree se...">word_chan</a>);
<a name="l00211"></a>00211 ngs-><a class="code" href="structngram__search__s.html#a79deb7295a261cd82d2a6b48cb119e77" title="Channels associated with a given word (only used for right contexts, single-phone words in fwdtree se...">word_chan</a> = ckd_calloc(<a class="code" href="dict_8h.html#a361b948b42f9cfdf5c7fa9dfc8a71a94" title="Packaged macro access to dictionary members.">dict_size</a>(ps_search_dict(ngs)),
<a name="l00212"></a>00212 <span class="keyword">sizeof</span>(*ngs-><a class="code" href="structngram__search__s.html#a79deb7295a261cd82d2a6b48cb119e77" title="Channels associated with a given word (only used for right contexts, single-phone words in fwdtree se...">word_chan</a>));
<a name="l00213"></a>00213 <span class="comment">/* Rebuild full expansion list from LM words. */</span>
<a name="l00214"></a>00214 ngram_fwdflat_expand_all(ngs);
<a name="l00215"></a>00215 <span class="comment">/* Allocate single phone words. */</span>
<a name="l00216"></a>00216 ngram_fwdflat_allocate_1ph(ngs);
<a name="l00217"></a>00217 }
<a name="l00218"></a>00218 <span class="comment">/* Otherwise there is nothing to do since the wordlist is</span>
<a name="l00219"></a>00219 <span class="comment"> * generated anew every utterance. */</span>
<a name="l00220"></a>00220 <span class="keywordflow">return</span> 0;
<a name="l00221"></a>00221 }
<a name="l00222"></a>00222
<a name="l00226"></a>00226 <span class="keyword">static</span> <span class="keywordtype">void</span>
<a name="l00227"></a>00227 build_fwdflat_wordlist(<a class="code" href="structngram__search__s.html" title="N-Gram search module structure.">ngram_search_t</a> *ngs)
<a name="l00228"></a>00228 {
<a name="l00229"></a>00229 int32 i, f, sf, ef, wid, nwd;
<a name="l00230"></a>00230 <a class="code" href="structdict__t.html" title="a structure for a dictionary.">dict_t</a> *dict;
<a name="l00231"></a>00231 <a class="code" href="structbptbl__s.html" title="Back pointer table (forward pass lattice; actually a tree)">bptbl_t</a> *bp;
<a name="l00232"></a>00232 <a class="code" href="structps__latnode__s.html" title="DAG nodes.">ps_latnode_t</a> *node, *prevnode, *nextnode;
<a name="l00233"></a>00233
<a name="l00234"></a>00234 <span class="comment">/* No tree-search, use statically allocated wordlist. */</span>
<a name="l00235"></a>00235 <span class="keywordflow">if</span> (!ngs->fwdtree)
<a name="l00236"></a>00236 <span class="keywordflow">return</span>;
<a name="l00237"></a>00237
<a name="l00238"></a>00238 dict = ps_search_dict(ngs);
<a name="l00239"></a>00239
<a name="l00240"></a>00240 memset(ngs-><a class="code" href="structngram__search__s.html#aa54544457c363ccccb87fc7ec63a5f3e" title="List of active words in each frame.">frm_wordlist</a>, 0, ngs-><a class="code" href="structngram__search__s.html#a38ea5de504b3d7ad2390a3f8966d502f" title="Number of frames allocated in bp_table_idx and friends.">n_frame_alloc</a> * <span class="keyword">sizeof</span>(*ngs-><a class="code" href="structngram__search__s.html#aa54544457c363ccccb87fc7ec63a5f3e" title="List of active words in each frame.">frm_wordlist</a>));
<a name="l00241"></a>00241
<a name="l00242"></a>00242 <span class="comment">/* Scan the backpointer table for all active words and record</span>
<a name="l00243"></a>00243 <span class="comment"> * their exit frames. */</span>
<a name="l00244"></a>00244 <span class="keywordflow">for</span> (i = 0, bp = ngs->bp_table; i < ngs->bpidx; i++, bp++) {
<a name="l00245"></a>00245 sf = (bp-><a class="code" href="structbptbl__s.html#a4ca45ebc4a1ac18fc0596195e7e03bc8" title="Back Pointer.">bp</a> < 0) ? 0 : ngs->bp_table[bp-><a class="code" href="structbptbl__s.html#a4ca45ebc4a1ac18fc0596195e7e03bc8" title="Back Pointer.">bp</a>].<a class="code" href="structbptbl__s.html#ad1f5831762cf337974ce243902364f42" title="start or end frame">frame</a> + 1;
<a name="l00246"></a>00246 ef = bp-><a class="code" href="structbptbl__s.html#ad1f5831762cf337974ce243902364f42" title="start or end frame">frame</a>;
<a name="l00247"></a>00247 wid = bp-><a class="code" href="structbptbl__s.html#a143ff0891fafd471000df7c73123b8a7" title="Word index.">wid</a>;
<a name="l00248"></a>00248
<a name="l00249"></a>00249 <span class="comment">/* Anything that can be transitioned to in the LM can go in</span>
<a name="l00250"></a>00250 <span class="comment"> * the word list. */</span>
<a name="l00251"></a>00251 if (!ngram_model_set_known_wid(ngs-><a class="code" href="structngram__search__s.html#a6127a6d8fb53832e67456c11aa6ad9c4" title="Set of language models.">lmset</a>,
<a name="l00252"></a>00252 dict_basewid(ps_search_dict(ngs), wid)))
<a name="l00253"></a>00253 <span class="keywordflow">continue</span>;
<a name="l00254"></a>00254
<a name="l00255"></a>00255 <span class="comment">/* Look for it in the wordlist. */</span>
<a name="l00256"></a>00256 <span class="keywordflow">for</span> (node = ngs-><a class="code" href="structngram__search__s.html#aa54544457c363ccccb87fc7ec63a5f3e" title="List of active words in each frame.">frm_wordlist</a>[sf]; node && (node-><a class="code" href="structps__latnode__s.html#afd85dbd410d6e6d970c73088bc6fb97e" title="Dictionary word id.">wid</a> != wid);
<a name="l00257"></a>00257 node = node-><a class="code" href="structps__latnode__s.html#aca6f3d543a1712a1ca3bb8ec60f71c84" title="Next node in DAG (no ordering implied)">next</a>);
<a name="l00258"></a>00258
<a name="l00259"></a>00259 <span class="comment">/* Update last end frame. */</span>
<a name="l00260"></a>00260 <span class="keywordflow">if</span> (node)
<a name="l00261"></a>00261 node-><a class="code" href="structps__latnode__s.html#a5c7b9114d131151d6ce85228ea9f829d" title="Last end frame.">lef</a> = ef;
<a name="l00262"></a>00262 <span class="keywordflow">else</span> {
<a name="l00263"></a>00263 <span class="comment">/* New node; link to head of list */</span>
<a name="l00264"></a>00264 node = listelem_malloc(ngs-><a class="code" href="structngram__search__s.html#a21600dc2e23744f0be9c64a4db8d7e50" title="For latnode_t.">latnode_alloc</a>);
<a name="l00265"></a>00265 node-><a class="code" href="structps__latnode__s.html#afd85dbd410d6e6d970c73088bc6fb97e" title="Dictionary word id.">wid</a> = wid;
<a name="l00266"></a>00266 node-><a class="code" href="structps__latnode__s.html#a584ee5a303355d851ac903718998df14" title="First end frame.">fef</a> = node-><a class="code" href="structps__latnode__s.html#a5c7b9114d131151d6ce85228ea9f829d" title="Last end frame.">lef</a> = ef;
<a name="l00267"></a>00267
<a name="l00268"></a>00268 node-><a class="code" href="structps__latnode__s.html#aca6f3d543a1712a1ca3bb8ec60f71c84" title="Next node in DAG (no ordering implied)">next</a> = ngs-><a class="code" href="structngram__search__s.html#aa54544457c363ccccb87fc7ec63a5f3e" title="List of active words in each frame.">frm_wordlist</a>[sf];
<a name="l00269"></a>00269 ngs-><a class="code" href="structngram__search__s.html#aa54544457c363ccccb87fc7ec63a5f3e" title="List of active words in each frame.">frm_wordlist</a>[sf] = node;
<a name="l00270"></a>00270 }
<a name="l00271"></a>00271 }
<a name="l00272"></a>00272
<a name="l00273"></a>00273 <span class="comment">/* Eliminate "unlikely" words, for which there are too few end points */</span>
<a name="l00274"></a>00274 <span class="keywordflow">for</span> (f = 0; f < ngs-><a class="code" href="structngram__search__s.html#a5255e56d28c239a4e1d9b1721e8a2f8d" title="Number of frames actually present.">n_frame</a>; f++) {
<a name="l00275"></a>00275 prevnode = NULL;
<a name="l00276"></a>00276 <span class="keywordflow">for</span> (node = ngs-><a class="code" href="structngram__search__s.html#aa54544457c363ccccb87fc7ec63a5f3e" title="List of active words in each frame.">frm_wordlist</a>[f]; node; node = nextnode) {
<a name="l00277"></a>00277 nextnode = node-><a class="code" href="structps__latnode__s.html#aca6f3d543a1712a1ca3bb8ec60f71c84" title="Next node in DAG (no ordering implied)">next</a>;
<a name="l00278"></a>00278 <span class="comment">/* Word has too few endpoints */</span>
<a name="l00279"></a>00279 <span class="keywordflow">if</span> ((node-><a class="code" href="structps__latnode__s.html#a5c7b9114d131151d6ce85228ea9f829d" title="Last end frame.">lef</a> - node-><a class="code" href="structps__latnode__s.html#a584ee5a303355d851ac903718998df14" title="First end frame.">fef</a> < ngs->min_ef_width) ||
<a name="l00280"></a>00280 <span class="comment">/* Word is </s> and doesn't actually end in last frame */</span>
<a name="l00281"></a>00281 ((node-><a class="code" href="structps__latnode__s.html#afd85dbd410d6e6d970c73088bc6fb97e" title="Dictionary word id.">wid</a> == ps_search_finish_wid(ngs)) && (node-><a class="code" href="structps__latnode__s.html#a5c7b9114d131151d6ce85228ea9f829d" title="Last end frame.">lef</a> < ngs-><a class="code" href="structngram__search__s.html#a5255e56d28c239a4e1d9b1721e8a2f8d" title="Number of frames actually present.">n_frame</a> - 1))) {
<a name="l00282"></a>00282 <span class="keywordflow">if</span> (!prevnode)
<a name="l00283"></a>00283 ngs-><a class="code" href="structngram__search__s.html#aa54544457c363ccccb87fc7ec63a5f3e" title="List of active words in each frame.">frm_wordlist</a>[f] = nextnode;
<a name="l00284"></a>00284 <span class="keywordflow">else</span>
<a name="l00285"></a>00285 prevnode-><a class="code" href="structps__latnode__s.html#aca6f3d543a1712a1ca3bb8ec60f71c84" title="Next node in DAG (no ordering implied)">next</a> = nextnode;
<a name="l00286"></a>00286 listelem_free(ngs-><a class="code" href="structngram__search__s.html#a21600dc2e23744f0be9c64a4db8d7e50" title="For latnode_t.">latnode_alloc</a>, node);
<a name="l00287"></a>00287 }
<a name="l00288"></a>00288 <span class="keywordflow">else</span>
<a name="l00289"></a>00289 prevnode = node;
<a name="l00290"></a>00290 }
<a name="l00291"></a>00291 }
<a name="l00292"></a>00292
<a name="l00293"></a>00293 <span class="comment">/* Form overall wordlist for 2nd pass */</span>
<a name="l00294"></a>00294 nwd = 0;
<a name="l00295"></a>00295 bitvec_clear_all(ngs-><a class="code" href="structngram__search__s.html#aeb4c98851bf9b239ca607ca59f59ff4c" title="array of active flags for all words.">word_active</a>, ps_search_n_words(ngs));
<a name="l00296"></a>00296 <span class="keywordflow">for</span> (f = 0; f < ngs-><a class="code" href="structngram__search__s.html#a5255e56d28c239a4e1d9b1721e8a2f8d" title="Number of frames actually present.">n_frame</a>; f++) {
<a name="l00297"></a>00297 <span class="keywordflow">for</span> (node = ngs-><a class="code" href="structngram__search__s.html#aa54544457c363ccccb87fc7ec63a5f3e" title="List of active words in each frame.">frm_wordlist</a>[f]; node; node = node-><a class="code" href="structps__latnode__s.html#aca6f3d543a1712a1ca3bb8ec60f71c84" title="Next node in DAG (no ordering implied)">next</a>) {
<a name="l00298"></a>00298 <span class="keywordflow">if</span> (!bitvec_is_set(ngs-><a class="code" href="structngram__search__s.html#aeb4c98851bf9b239ca607ca59f59ff4c" title="array of active flags for all words.">word_active</a>, node-><a class="code" href="structps__latnode__s.html#afd85dbd410d6e6d970c73088bc6fb97e" title="Dictionary word id.">wid</a>)) {
<a name="l00299"></a>00299 bitvec_set(ngs-><a class="code" href="structngram__search__s.html#aeb4c98851bf9b239ca607ca59f59ff4c" title="array of active flags for all words.">word_active</a>, node-><a class="code" href="structps__latnode__s.html#afd85dbd410d6e6d970c73088bc6fb97e" title="Dictionary word id.">wid</a>);
<a name="l00300"></a>00300 ngs-><a class="code" href="structngram__search__s.html#a774f1640c5ece856f4bef98d98e7c959" title="List of active word IDs for utterance.">fwdflat_wordlist</a>[nwd++] = node-><a class="code" href="structps__latnode__s.html#afd85dbd410d6e6d970c73088bc6fb97e" title="Dictionary word id.">wid</a>;
<a name="l00301"></a>00301 }
<a name="l00302"></a>00302 }
<a name="l00303"></a>00303 }
<a name="l00304"></a>00304 ngs-><a class="code" href="structngram__search__s.html#a774f1640c5ece856f4bef98d98e7c959" title="List of active word IDs for utterance.">fwdflat_wordlist</a>[nwd] = -1;
<a name="l00305"></a>00305 E_INFO(<span class="stringliteral">"Utterance vocabulary contains %d words\n"</span>, nwd);
<a name="l00306"></a>00306 }
<a name="l00307"></a>00307
<a name="l00311"></a>00311 <span class="keyword">static</span> <span class="keywordtype">void</span>
<a name="l00312"></a>00312 build_fwdflat_chan(<a class="code" href="structngram__search__s.html" title="N-Gram search module structure.">ngram_search_t</a> *ngs)
<a name="l00313"></a>00313 {
<a name="l00314"></a>00314 int32 i, wid, p;
<a name="l00315"></a>00315 <a class="code" href="structroot__chan__s.html" title="Lexical tree node data type for the first phone (root) of each dynamic HMM tree structure.">root_chan_t</a> *rhmm;
<a name="l00316"></a>00316 <a class="code" href="structchan__s.html" title="Lexical tree node data type.">chan_t</a> *hmm, *prevhmm;
<a name="l00317"></a>00317 <a class="code" href="structdict__t.html" title="a structure for a dictionary.">dict_t</a> *dict;
<a name="l00318"></a>00318 <a class="code" href="structdict2pid__t.html" title="Building composite triphone (as well as word internal triphones) with the dictionary.">dict2pid_t</a> *d2p;
<a name="l00319"></a>00319
<a name="l00320"></a>00320 dict = ps_search_dict(ngs);
<a name="l00321"></a>00321 d2p = ps_search_dict2pid(ngs);
<a name="l00322"></a>00322
<a name="l00323"></a>00323 <span class="comment">/* Build word HMMs for each word in the lattice. */</span>
<a name="l00324"></a>00324 <span class="keywordflow">for</span> (i = 0; ngs-><a class="code" href="structngram__search__s.html#a774f1640c5ece856f4bef98d98e7c959" title="List of active word IDs for utterance.">fwdflat_wordlist</a>[i] >= 0; i++) {
<a name="l00325"></a>00325 wid = ngs-><a class="code" href="structngram__search__s.html#a774f1640c5ece856f4bef98d98e7c959" title="List of active word IDs for utterance.">fwdflat_wordlist</a>[i];
<a name="l00326"></a>00326
<a name="l00327"></a>00327 <span class="comment">/* Single-phone words are permanently allocated */</span>
<a name="l00328"></a>00328 <span class="keywordflow">if</span> (dict_is_single_phone(dict, wid))
<a name="l00329"></a>00329 <span class="keywordflow">continue</span>;
<a name="l00330"></a>00330
<a name="l00331"></a>00331 assert(ngs-><a class="code" href="structngram__search__s.html#a79deb7295a261cd82d2a6b48cb119e77" title="Channels associated with a given word (only used for right contexts, single-phone words in fwdtree se...">word_chan</a>[wid] == NULL);
<a name="l00332"></a>00332
<a name="l00333"></a>00333 <span class="comment">/* Multiplex root HMM for first phone (one root per word, flat</span>
<a name="l00334"></a>00334 <span class="comment"> * lexicon). diphone is irrelevant here, for the time being,</span>
<a name="l00335"></a>00335 <span class="comment"> * at least. */</span>
<a name="l00336"></a>00336 rhmm = listelem_malloc(ngs-><a class="code" href="structngram__search__s.html#a576470858bfa44c671f0e677902ab424" title="For root_chan_t.">root_chan_alloc</a>);
<a name="l00337"></a>00337 rhmm-><a class="code" href="structroot__chan__s.html#a0c0cf22caf4c97879af86865764f1675" title="second ciphone of this node; one root HMM for each unique right context">ci2phone</a> = dict_second_phone(dict, wid);
<a name="l00338"></a>00338 rhmm-><a class="code" href="structroot__chan__s.html#ad67c37bf4183f518acd7760c09a806f6" title="first ciphone of this node; all words rooted at this node begin with this ciphone">ciphone</a> = dict_first_phone(dict, wid);
<a name="l00339"></a>00339 rhmm-><a class="code" href="structroot__chan__s.html#ae0f0b90a7cb2fcb54cd7b30502dd497e" title="first descendant of this channel">next</a> = NULL;
<a name="l00340"></a>00340 hmm_init(ngs-><a class="code" href="structngram__search__s.html#acfbdd34e3dadbaa384818402f1dd59bf" title="HMM context.">hmmctx</a>, &rhmm-><a class="code" href="structroot__chan__s.html#a9d4d92ffa8b4079202ddebe3ba0eb290" title="Basic HMM structure.">hmm</a>, TRUE,
<a name="l00341"></a>00341 bin_mdef_pid2ssid(ps_search_acmod(ngs)->mdef, rhmm-><a class="code" href="structroot__chan__s.html#ad67c37bf4183f518acd7760c09a806f6" title="first ciphone of this node; all words rooted at this node begin with this ciphone">ciphone</a>),
<a name="l00342"></a>00342 bin_mdef_pid2tmatid(ps_search_acmod(ngs)->mdef, rhmm-><a class="code" href="structroot__chan__s.html#ad67c37bf4183f518acd7760c09a806f6" title="first ciphone of this node; all words rooted at this node begin with this ciphone">ciphone</a>));
<a name="l00343"></a>00343
<a name="l00344"></a>00344 <span class="comment">/* HMMs for word-internal phones */</span>
<a name="l00345"></a>00345 prevhmm = NULL;
<a name="l00346"></a>00346 <span class="keywordflow">for</span> (p = 1; p < dict_pronlen(dict, wid) - 1; p++) {
<a name="l00347"></a>00347 hmm = listelem_malloc(ngs-><a class="code" href="structngram__search__s.html#abe9fe60f6e48b9a6e3d41856bb1dc109" title="For chan_t.">chan_alloc</a>);
<a name="l00348"></a>00348 hmm-><a class="code" href="structchan__s.html#a33da51d8524073abc792519d0738ca0b" title="ciphone for this node">ciphone</a> = <a class="code" href="dict_8h.html#a8785ab6264a5c6cf0b8da6bf79a46de4" title="The CI phones of the word w at position p.">dict_pron</a>(dict, wid, p);
<a name="l00349"></a>00349 hmm->info.<a class="code" href="structchan__s.html#acf84a2fa662e7ff626769e7d8152a608" title="right-context id for last phone of words">rc_id</a> = (p == dict_pronlen(dict, wid) - 1) ? 0 : -1;
<a name="l00350"></a>00350 hmm-><a class="code" href="structchan__s.html#a260b68eff64150d0ae9ce4db7feb1300" title="first descendant of this channel; or, in the case of the last phone of a word, the next alternative r...">next</a> = NULL;
<a name="l00351"></a>00351 hmm_init(ngs-><a class="code" href="structngram__search__s.html#acfbdd34e3dadbaa384818402f1dd59bf" title="HMM context.">hmmctx</a>, &hmm-><a class="code" href="structchan__s.html#a742d6a125ac468b95a1ddd880a956e35" title="Basic HMM structure.">hmm</a>, FALSE,
<a name="l00352"></a>00352 <a class="code" href="dict2pid_8c.html#a720e15c92ef6930e722bccb014e11b7b" title="Return the senone sequence ID for the given word position.">dict2pid_internal</a>(d2p,wid,p),
<a name="l00353"></a>00353 bin_mdef_pid2tmatid(ps_search_acmod(ngs)->mdef, hmm-><a class="code" href="structchan__s.html#a33da51d8524073abc792519d0738ca0b" title="ciphone for this node">ciphone</a>));
<a name="l00354"></a>00354
<a name="l00355"></a>00355 <span class="keywordflow">if</span> (prevhmm)
<a name="l00356"></a>00356 prevhmm-><a class="code" href="structchan__s.html#a260b68eff64150d0ae9ce4db7feb1300" title="first descendant of this channel; or, in the case of the last phone of a word, the next alternative r...">next</a> = hmm;
<a name="l00357"></a>00357 <span class="keywordflow">else</span>
<a name="l00358"></a>00358 rhmm-><a class="code" href="structroot__chan__s.html#ae0f0b90a7cb2fcb54cd7b30502dd497e" title="first descendant of this channel">next</a> = hmm;
<a name="l00359"></a>00359
<a name="l00360"></a>00360 prevhmm = hmm;
<a name="l00361"></a>00361 }
<a name="l00362"></a>00362
<a name="l00363"></a>00363 <span class="comment">/* Right-context phones */</span>
<a name="l00364"></a>00364 <a class="code" href="ngram__search_8c.html#a1ddcc1a9cb3e164ceb2140097ed23a3e" title="Allocate last phone channels for all possible right contexts for word w.">ngram_search_alloc_all_rc</a>(ngs, wid);
<a name="l00365"></a>00365
<a name="l00366"></a>00366 <span class="comment">/* Link in just allocated right-context phones */</span>
<a name="l00367"></a>00367 <span class="keywordflow">if</span> (prevhmm)
<a name="l00368"></a>00368 prevhmm-><a class="code" href="structchan__s.html#a260b68eff64150d0ae9ce4db7feb1300" title="first descendant of this channel; or, in the case of the last phone of a word, the next alternative r...">next</a> = ngs-><a class="code" href="structngram__search__s.html#a79deb7295a261cd82d2a6b48cb119e77" title="Channels associated with a given word (only used for right contexts, single-phone words in fwdtree se...">word_chan</a>[wid];
<a name="l00369"></a>00369 <span class="keywordflow">else</span>
<a name="l00370"></a>00370 rhmm-><a class="code" href="structroot__chan__s.html#ae0f0b90a7cb2fcb54cd7b30502dd497e" title="first descendant of this channel">next</a> = ngs-><a class="code" href="structngram__search__s.html#a79deb7295a261cd82d2a6b48cb119e77" title="Channels associated with a given word (only used for right contexts, single-phone words in fwdtree se...">word_chan</a>[wid];
<a name="l00371"></a>00371 ngs-><a class="code" href="structngram__search__s.html#a79deb7295a261cd82d2a6b48cb119e77" title="Channels associated with a given word (only used for right contexts, single-phone words in fwdtree se...">word_chan</a>[wid] = (<a class="code" href="structchan__s.html" title="Lexical tree node data type.">chan_t</a> *) rhmm;
<a name="l00372"></a>00372 }
<a name="l00373"></a>00373
<a name="l00374"></a>00374 }
<a name="l00375"></a>00375
<a name="l00376"></a>00376 <span class="keywordtype">void</span>
<a name="l00377"></a><a class="code" href="ngram__search__fwdflat_8h.html#a763c2c7aaa5d7f9c5107af73552a2149">00377</a> <a class="code" href="ngram__search__fwdflat_8c.html#a763c2c7aaa5d7f9c5107af73552a2149" title="Start fwdflat decoding for an utterance.">ngram_fwdflat_start</a>(<a class="code" href="structngram__search__s.html" title="N-Gram search module structure.">ngram_search_t</a> *ngs)
<a name="l00378"></a>00378 {
<a name="l00379"></a>00379 <a class="code" href="structroot__chan__s.html" title="Lexical tree node data type for the first phone (root) of each dynamic HMM tree structure.">root_chan_t</a> *rhmm;
<a name="l00380"></a>00380 <span class="keywordtype">int</span> i;
<a name="l00381"></a>00381
<a name="l00382"></a>00382 ptmr_reset(&ngs->fwdflat_perf);
<a name="l00383"></a>00383 ptmr_start(&ngs->fwdflat_perf);
<a name="l00384"></a>00384 build_fwdflat_wordlist(ngs);
<a name="l00385"></a>00385 build_fwdflat_chan(ngs);
<a name="l00386"></a>00386
<a name="l00387"></a>00387 ngs->bpidx = 0;
<a name="l00388"></a>00388 ngs->bss_head = 0;
<a name="l00389"></a>00389
<a name="l00390"></a>00390 <span class="keywordflow">for</span> (i = 0; i < ps_search_n_words(ngs); i++)
<a name="l00391"></a>00391 ngs->word_lat_idx[i] = NO_BP;
<a name="l00392"></a>00392
<a name="l00393"></a>00393 <span class="comment">/* Reset the permanently allocated single-phone words, since they</span>
<a name="l00394"></a>00394 <span class="comment"> * may have junk left over in them from previous searches. */</span>
<a name="l00395"></a>00395 for (i = 0; i < ngs-><a class="code" href="structngram__search__s.html#a9168184c862d6f63bd7926e6581b25d9" title="Number single phone words in dict (total)">n_1ph_words</a>; i++) {
<a name="l00396"></a>00396 int32 w = ngs-><a class="code" href="structngram__search__s.html#a1157923e0060b947e05caa819c8abe2c" title="list of single-phone word ids">single_phone_wid</a>[i];
<a name="l00397"></a>00397 rhmm = (<a class="code" href="structroot__chan__s.html" title="Lexical tree node data type for the first phone (root) of each dynamic HMM tree structure.">root_chan_t</a> *) ngs-><a class="code" href="structngram__search__s.html#a79deb7295a261cd82d2a6b48cb119e77" title="Channels associated with a given word (only used for right contexts, single-phone words in fwdtree se...">word_chan</a>[w];
<a name="l00398"></a>00398 hmm_clear(&rhmm-><a class="code" href="structroot__chan__s.html#a9d4d92ffa8b4079202ddebe3ba0eb290" title="Basic HMM structure.">hmm</a>);
<a name="l00399"></a>00399 }
<a name="l00400"></a>00400
<a name="l00401"></a>00401 <span class="comment">/* Start search with <s>; word_chan[<s>] is permanently allocated */</span>
<a name="l00402"></a>00402 rhmm = (<a class="code" href="structroot__chan__s.html" title="Lexical tree node data type for the first phone (root) of each dynamic HMM tree structure.">root_chan_t</a> *) ngs-><a class="code" href="structngram__search__s.html#a79deb7295a261cd82d2a6b48cb119e77" title="Channels associated with a given word (only used for right contexts, single-phone words in fwdtree se...">word_chan</a>[ps_search_start_wid(ngs)];
<a name="l00403"></a>00403 hmm_enter(&rhmm-><a class="code" href="structroot__chan__s.html#a9d4d92ffa8b4079202ddebe3ba0eb290" title="Basic HMM structure.">hmm</a>, 0, NO_BP, 0);
<a name="l00404"></a>00404 ngs-><a class="code" href="structngram__search__s.html#a5056573bf95990cc28c97a56cd76ce9a" title="Array of active multi-phone words for current and next frame.">active_word_list</a>[0][0] = ps_search_start_wid(ngs);
<a name="l00405"></a>00405 ngs-><a class="code" href="structngram__search__s.html#a5c864f1fe331fc95c04e0d87a5bdf9ee" title="Number entries in active_word_list.">n_active_word</a>[0] = 1;
<a name="l00406"></a>00406
<a name="l00407"></a>00407 ngs-><a class="code" href="structngram__search__s.html#a150d99157e2f37a6f0dbb4b02682d9c3" title="Best Viterbi path score.">best_score</a> = 0;
<a name="l00408"></a>00408 ngs->renormalized = FALSE;
<a name="l00409"></a>00409
<a name="l00410"></a>00410 <span class="keywordflow">for</span> (i = 0; i < ps_search_n_words(ngs); i++)
<a name="l00411"></a>00411 ngs->last_ltrans[i].sf = -1;
<a name="l00412"></a>00412
<a name="l00413"></a>00413 if (!ngs->fwdtree)
<a name="l00414"></a>00414 ngs-><a class="code" href="structngram__search__s.html#a5255e56d28c239a4e1d9b1721e8a2f8d" title="Number of frames actually present.">n_frame</a> = 0;
<a name="l00415"></a>00415
<a name="l00416"></a>00416 ngs-><a class="code" href="structngram__search__s.html#a5758d167fbb48e824a6a58186620e06d" title="Various statistics for profiling.">st</a>.n_fwdflat_chan = 0;
<a name="l00417"></a>00417 ngs-><a class="code" href="structngram__search__s.html#a5758d167fbb48e824a6a58186620e06d" title="Various statistics for profiling.">st</a>.n_fwdflat_words = 0;
<a name="l00418"></a>00418 ngs-><a class="code" href="structngram__search__s.html#a5758d167fbb48e824a6a58186620e06d" title="Various statistics for profiling.">st</a>.n_fwdflat_word_transition = 0;
<a name="l00419"></a>00419 ngs-><a class="code" href="structngram__search__s.html#a5758d167fbb48e824a6a58186620e06d" title="Various statistics for profiling.">st</a>.n_senone_active_utt = 0;
<a name="l00420"></a>00420 }
<a name="l00421"></a>00421
<a name="l00422"></a>00422 <span class="keyword">static</span> <span class="keywordtype">void</span>
<a name="l00423"></a>00423 compute_fwdflat_sen_active(<a class="code" href="structngram__search__s.html" title="N-Gram search module structure.">ngram_search_t</a> *ngs, <span class="keywordtype">int</span> frame_idx)
<a name="l00424"></a>00424 {
<a name="l00425"></a>00425 int32 i, w;
<a name="l00426"></a>00426 int32 *awl;
<a name="l00427"></a>00427 <a class="code" href="structroot__chan__s.html" title="Lexical tree node data type for the first phone (root) of each dynamic HMM tree structure.">root_chan_t</a> *rhmm;
<a name="l00428"></a>00428 <a class="code" href="structchan__s.html" title="Lexical tree node data type.">chan_t</a> *hmm;
<a name="l00429"></a>00429
<a name="l00430"></a>00430 <a class="code" href="acmod_8c.html#aed43f033f434e34fd90c975909d81cb2" title="Clear set of active senones.">acmod_clear_active</a>(ps_search_acmod(ngs));
<a name="l00431"></a>00431
<a name="l00432"></a>00432 i = ngs-><a class="code" href="structngram__search__s.html#a5c864f1fe331fc95c04e0d87a5bdf9ee" title="Number entries in active_word_list.">n_active_word</a>[frame_idx & 0x1];
<a name="l00433"></a>00433 awl = ngs-><a class="code" href="structngram__search__s.html#a5056573bf95990cc28c97a56cd76ce9a" title="Array of active multi-phone words for current and next frame.">active_word_list</a>[frame_idx & 0x1];
<a name="l00434"></a>00434
<a name="l00435"></a>00435 <span class="keywordflow">for</span> (w = *(awl++); i > 0; --i, w = *(awl++)) {
<a name="l00436"></a>00436 rhmm = (<a class="code" href="structroot__chan__s.html" title="Lexical tree node data type for the first phone (root) of each dynamic HMM tree structure.">root_chan_t</a> *)ngs-><a class="code" href="structngram__search__s.html#a79deb7295a261cd82d2a6b48cb119e77" title="Channels associated with a given word (only used for right contexts, single-phone words in fwdtree se...">word_chan</a>[w];
<a name="l00437"></a>00437 if (hmm_frame(&rhmm-><a class="code" href="structroot__chan__s.html#a9d4d92ffa8b4079202ddebe3ba0eb290" title="Basic HMM structure.">hmm</a>) == frame_idx) {
<a name="l00438"></a>00438 <a class="code" href="acmod_8c.html#a2a7f67d462279b2bc4774c7967ae61c7" title="Activate senones associated with an HMM.">acmod_activate_hmm</a>(ps_search_acmod(ngs), &rhmm-><a class="code" href="structroot__chan__s.html#a9d4d92ffa8b4079202ddebe3ba0eb290" title="Basic HMM structure.">hmm</a>);
<a name="l00439"></a>00439 }
<a name="l00440"></a>00440
<a name="l00441"></a>00441 <span class="keywordflow">for</span> (hmm = rhmm-><a class="code" href="structroot__chan__s.html#ae0f0b90a7cb2fcb54cd7b30502dd497e" title="first descendant of this channel">next</a>; hmm; hmm = hmm-><a class="code" href="structchan__s.html#a260b68eff64150d0ae9ce4db7feb1300" title="first descendant of this channel; or, in the case of the last phone of a word, the next alternative r...">next</a>) {
<a name="l00442"></a>00442 <span class="keywordflow">if</span> (hmm_frame(&hmm-><a class="code" href="structchan__s.html#a742d6a125ac468b95a1ddd880a956e35" title="Basic HMM structure.">hmm</a>) == frame_idx) {
<a name="l00443"></a>00443 <a class="code" href="acmod_8c.html#a2a7f67d462279b2bc4774c7967ae61c7" title="Activate senones associated with an HMM.">acmod_activate_hmm</a>(ps_search_acmod(ngs), &hmm-><a class="code" href="structchan__s.html#a742d6a125ac468b95a1ddd880a956e35" title="Basic HMM structure.">hmm</a>);
<a name="l00444"></a>00444 }
<a name="l00445"></a>00445 }
<a name="l00446"></a>00446 }
<a name="l00447"></a>00447 }
<a name="l00448"></a>00448
<a name="l00449"></a>00449 <span class="keyword">static</span> <span class="keywordtype">void</span>
<a name="l00450"></a>00450 fwdflat_eval_chan(<a class="code" href="structngram__search__s.html" title="N-Gram search module structure.">ngram_search_t</a> *ngs, <span class="keywordtype">int</span> frame_idx)
<a name="l00451"></a>00451 {
<a name="l00452"></a>00452 int32 i, w, bestscore;
<a name="l00453"></a>00453 int32 *awl;
<a name="l00454"></a>00454 <a class="code" href="structroot__chan__s.html" title="Lexical tree node data type for the first phone (root) of each dynamic HMM tree structure.">root_chan_t</a> *rhmm;
<a name="l00455"></a>00455 <a class="code" href="structchan__s.html" title="Lexical tree node data type.">chan_t</a> *hmm;
<a name="l00456"></a>00456
<a name="l00457"></a>00457 i = ngs-><a class="code" href="structngram__search__s.html#a5c864f1fe331fc95c04e0d87a5bdf9ee" title="Number entries in active_word_list.">n_active_word</a>[frame_idx & 0x1];
<a name="l00458"></a>00458 awl = ngs-><a class="code" href="structngram__search__s.html#a5056573bf95990cc28c97a56cd76ce9a" title="Array of active multi-phone words for current and next frame.">active_word_list</a>[frame_idx & 0x1];
<a name="l00459"></a>00459 bestscore = <a class="code" href="hmm_8h.html#a833f100ee293ad0f1c03f2a5ef9be77a" title="Large &quot;bad&quot; score.">WORST_SCORE</a>;
<a name="l00460"></a>00460
<a name="l00461"></a>00461 ngs-><a class="code" href="structngram__search__s.html#a5758d167fbb48e824a6a58186620e06d" title="Various statistics for profiling.">st</a>.n_fwdflat_words += i;
<a name="l00462"></a>00462
<a name="l00463"></a>00463 <span class="comment">/* Scan all active words. */</span>
<a name="l00464"></a>00464 <span class="keywordflow">for</span> (w = *(awl++); i > 0; --i, w = *(awl++)) {
<a name="l00465"></a>00465 rhmm = (<a class="code" href="structroot__chan__s.html" title="Lexical tree node data type for the first phone (root) of each dynamic HMM tree structure.">root_chan_t</a> *) ngs-><a class="code" href="structngram__search__s.html#a79deb7295a261cd82d2a6b48cb119e77" title="Channels associated with a given word (only used for right contexts, single-phone words in fwdtree se...">word_chan</a>[w];
<a name="l00466"></a>00466 if (hmm_frame(&rhmm-><a class="code" href="structroot__chan__s.html#a9d4d92ffa8b4079202ddebe3ba0eb290" title="Basic HMM structure.">hmm</a>) == frame_idx) {
<a name="l00467"></a>00467 int32 score = chan_v_eval(rhmm);
<a name="l00468"></a>00468 <span class="keywordflow">if</span> ((score <a class="code" href="hmm_8h.html#a2874ab52613ff781c96f570ec0eb0d98" title="Is one score better than another?">BETTER_THAN</a> bestscore) && (w != ps_search_finish_wid(ngs)))
<a name="l00469"></a>00469 bestscore = score;
<a name="l00470"></a>00470 ngs-><a class="code" href="structngram__search__s.html#a5758d167fbb48e824a6a58186620e06d" title="Various statistics for profiling.">st</a>.n_fwdflat_chan++;
<a name="l00471"></a>00471 }
<a name="l00472"></a>00472
<a name="l00473"></a>00473 <span class="keywordflow">for</span> (hmm = rhmm-><a class="code" href="structroot__chan__s.html#ae0f0b90a7cb2fcb54cd7b30502dd497e" title="first descendant of this channel">next</a>; hmm; hmm = hmm-><a class="code" href="structchan__s.html#a260b68eff64150d0ae9ce4db7feb1300" title="first descendant of this channel; or, in the case of the last phone of a word, the next alternative r...">next</a>) {
<a name="l00474"></a>00474 <span class="keywordflow">if</span> (hmm_frame(&hmm-><a class="code" href="structchan__s.html#a742d6a125ac468b95a1ddd880a956e35" title="Basic HMM structure.">hmm</a>) == frame_idx) {
<a name="l00475"></a>00475 int32 score = chan_v_eval(hmm);
<a name="l00476"></a>00476 <span class="keywordflow">if</span> (score <a class="code" href="hmm_8h.html#a2874ab52613ff781c96f570ec0eb0d98" title="Is one score better than another?">BETTER_THAN</a> bestscore)
<a name="l00477"></a>00477 bestscore = score;
<a name="l00478"></a>00478 ngs-><a class="code" href="structngram__search__s.html#a5758d167fbb48e824a6a58186620e06d" title="Various statistics for profiling.">st</a>.n_fwdflat_chan++;
<a name="l00479"></a>00479 }
<a name="l00480"></a>00480 }
<a name="l00481"></a>00481 }
<a name="l00482"></a>00482
<a name="l00483"></a>00483 ngs-><a class="code" href="structngram__search__s.html#a150d99157e2f37a6f0dbb4b02682d9c3" title="Best Viterbi path score.">best_score</a> = bestscore;
<a name="l00484"></a>00484 }
<a name="l00485"></a>00485
<a name="l00486"></a>00486 <span class="keyword">static</span> <span class="keywordtype">void</span>
<a name="l00487"></a>00487 fwdflat_prune_chan(<a class="code" href="structngram__search__s.html" title="N-Gram search module structure.">ngram_search_t</a> *ngs, <span class="keywordtype">int</span> frame_idx)
<a name="l00488"></a>00488 {
<a name="l00489"></a>00489 int32 i, cf, nf, w, pip, newscore, thresh, wordthresh;
<a name="l00490"></a>00490 int32 *awl;
<a name="l00491"></a>00491 <a class="code" href="structroot__chan__s.html" title="Lexical tree node data type for the first phone (root) of each dynamic HMM tree structure.">root_chan_t</a> *rhmm;
<a name="l00492"></a>00492 <a class="code" href="structchan__s.html" title="Lexical tree node data type.">chan_t</a> *hmm, *nexthmm;
<a name="l00493"></a>00493
<a name="l00494"></a>00494 cf = frame_idx;
<a name="l00495"></a>00495 nf = cf + 1;
<a name="l00496"></a>00496 i = ngs-><a class="code" href="structngram__search__s.html#a5c864f1fe331fc95c04e0d87a5bdf9ee" title="Number entries in active_word_list.">n_active_word</a>[cf & 0x1];
<a name="l00497"></a>00497 awl = ngs-><a class="code" href="structngram__search__s.html#a5056573bf95990cc28c97a56cd76ce9a" title="Array of active multi-phone words for current and next frame.">active_word_list</a>[cf & 0x1];
<a name="l00498"></a>00498 bitvec_clear_all(ngs-><a class="code" href="structngram__search__s.html#aeb4c98851bf9b239ca607ca59f59ff4c" title="array of active flags for all words.">word_active</a>, ps_search_n_words(ngs));
<a name="l00499"></a>00499
<a name="l00500"></a>00500 thresh = ngs-><a class="code" href="structngram__search__s.html#a150d99157e2f37a6f0dbb4b02682d9c3" title="Best Viterbi path score.">best_score</a> + ngs->fwdflatbeam;
<a name="l00501"></a>00501 wordthresh = ngs-><a class="code" href="structngram__search__s.html#a150d99157e2f37a6f0dbb4b02682d9c3" title="Best Viterbi path score.">best_score</a> + ngs->fwdflatwbeam;
<a name="l00502"></a>00502 pip = ngs->pip;
<a name="l00503"></a>00503 E_DEBUG(3,(<span class="stringliteral">"frame %d thresh %d wordthresh %d\n"</span>, frame_idx, thresh, wordthresh));
<a name="l00504"></a>00504
<a name="l00505"></a>00505 <span class="comment">/* Scan all active words. */</span>
<a name="l00506"></a>00506 <span class="keywordflow">for</span> (w = *(awl++); i > 0; --i, w = *(awl++)) {
<a name="l00507"></a>00507 rhmm = (<a class="code" href="structroot__chan__s.html" title="Lexical tree node data type for the first phone (root) of each dynamic HMM tree structure.">root_chan_t</a> *) ngs-><a class="code" href="structngram__search__s.html#a79deb7295a261cd82d2a6b48cb119e77" title="Channels associated with a given word (only used for right contexts, single-phone words in fwdtree se...">word_chan</a>[w];
<a name="l00508"></a>00508 <span class="comment">/* Propagate active root channels */</span>
<a name="l00509"></a>00509 if (hmm_frame(&rhmm-><a class="code" href="structroot__chan__s.html#a9d4d92ffa8b4079202ddebe3ba0eb290" title="Basic HMM structure.">hmm</a>) == cf
<a name="l00510"></a>00510 && hmm_bestscore(&rhmm-><a class="code" href="structroot__chan__s.html#a9d4d92ffa8b4079202ddebe3ba0eb290" title="Basic HMM structure.">hmm</a>) <a class="code" href="hmm_8h.html#a2874ab52613ff781c96f570ec0eb0d98" title="Is one score better than another?">BETTER_THAN</a> thresh) {
<a name="l00511"></a>00511 hmm_frame(&rhmm-><a class="code" href="structroot__chan__s.html#a9d4d92ffa8b4079202ddebe3ba0eb290" title="Basic HMM structure.">hmm</a>) = nf;
<a name="l00512"></a>00512 bitvec_set(ngs-><a class="code" href="structngram__search__s.html#aeb4c98851bf9b239ca607ca59f59ff4c" title="array of active flags for all words.">word_active</a>, w);
<a name="l00513"></a>00513
<a name="l00514"></a>00514 <span class="comment">/* Transitions out of root channel */</span>
<a name="l00515"></a>00515 newscore = hmm_out_score(&rhmm-><a class="code" href="structroot__chan__s.html#a9d4d92ffa8b4079202ddebe3ba0eb290" title="Basic HMM structure.">hmm</a>);
<a name="l00516"></a>00516 <span class="keywordflow">if</span> (rhmm-><a class="code" href="structroot__chan__s.html#ae0f0b90a7cb2fcb54cd7b30502dd497e" title="first descendant of this channel">next</a>) {
<a name="l00517"></a>00517 assert(!dict_is_single_phone(ps_search_dict(ngs), w));
<a name="l00518"></a>00518
<a name="l00519"></a>00519 newscore += pip;
<a name="l00520"></a>00520 <span class="keywordflow">if</span> (newscore <a class="code" href="hmm_8h.html#a2874ab52613ff781c96f570ec0eb0d98" title="Is one score better than another?">BETTER_THAN</a> thresh) {
<a name="l00521"></a>00521 hmm = rhmm-><a class="code" href="structroot__chan__s.html#ae0f0b90a7cb2fcb54cd7b30502dd497e" title="first descendant of this channel">next</a>;
<a name="l00522"></a>00522 <span class="comment">/* Enter all right context phones */</span>
<a name="l00523"></a>00523 <span class="keywordflow">if</span> (hmm->info.<a class="code" href="structchan__s.html#acf84a2fa662e7ff626769e7d8152a608" title="right-context id for last phone of words">rc_id</a> >= 0) {
<a name="l00524"></a>00524 <span class="keywordflow">for</span> (; hmm; hmm = hmm-><a class="code" href="structchan__s.html#a260b68eff64150d0ae9ce4db7feb1300" title="first descendant of this channel; or, in the case of the last phone of a word, the next alternative r...">next</a>) {
<a name="l00525"></a>00525 <span class="keywordflow">if</span> ((hmm_frame(&hmm-><a class="code" href="structchan__s.html#a742d6a125ac468b95a1ddd880a956e35" title="Basic HMM structure.">hmm</a>) < cf)
<a name="l00526"></a>00526 || (newscore <a class="code" href="hmm_8h.html#a2874ab52613ff781c96f570ec0eb0d98" title="Is one score better than another?">BETTER_THAN</a> hmm_in_score(&hmm-><a class="code" href="structchan__s.html#a742d6a125ac468b95a1ddd880a956e35" title="Basic HMM structure.">hmm</a>))) {
<a name="l00527"></a>00527 hmm_enter(&hmm-><a class="code" href="structchan__s.html#a742d6a125ac468b95a1ddd880a956e35" title="Basic HMM structure.">hmm</a>, newscore,
<a name="l00528"></a>00528 hmm_out_history(&rhmm-><a class="code" href="structroot__chan__s.html#a9d4d92ffa8b4079202ddebe3ba0eb290" title="Basic HMM structure.">hmm</a>), nf);
<a name="l00529"></a>00529 }
<a name="l00530"></a>00530 }
<a name="l00531"></a>00531 }
<a name="l00532"></a>00532 <span class="comment">/* Just a normal word internal phone */</span>
<a name="l00533"></a>00533 <span class="keywordflow">else</span> {
<a name="l00534"></a>00534 <span class="keywordflow">if</span> ((hmm_frame(&hmm-><a class="code" href="structchan__s.html#a742d6a125ac468b95a1ddd880a956e35" title="Basic HMM structure.">hmm</a>) < cf)
<a name="l00535"></a>00535 || (newscore <a class="code" href="hmm_8h.html#a2874ab52613ff781c96f570ec0eb0d98" title="Is one score better than another?">BETTER_THAN</a> hmm_in_score(&hmm-><a class="code" href="structchan__s.html#a742d6a125ac468b95a1ddd880a956e35" title="Basic HMM structure.">hmm</a>))) {
<a name="l00536"></a>00536 hmm_enter(&hmm-><a class="code" href="structchan__s.html#a742d6a125ac468b95a1ddd880a956e35" title="Basic HMM structure.">hmm</a>, newscore,
<a name="l00537"></a>00537 hmm_out_history(&rhmm-><a class="code" href="structroot__chan__s.html#a9d4d92ffa8b4079202ddebe3ba0eb290" title="Basic HMM structure.">hmm</a>), nf);
<a name="l00538"></a>00538 }
<a name="l00539"></a>00539 }
<a name="l00540"></a>00540 }
<a name="l00541"></a>00541 }
<a name="l00542"></a>00542 <span class="keywordflow">else</span> {
<a name="l00543"></a>00543 assert(dict_is_single_phone(ps_search_dict(ngs), w));
<a name="l00544"></a>00544
<a name="l00545"></a>00545 <span class="comment">/* Word exit for single-phone words (where did their</span>
<a name="l00546"></a>00546 <span class="comment"> * whmms come from?) (either from</span>
<a name="l00547"></a>00547 <span class="comment"> * ngram_search_fwdtree, or from</span>
<a name="l00548"></a>00548 <span class="comment"> * ngram_fwdflat_allocate_1ph(), that's where) */</span>
<a name="l00549"></a>00549 <span class="keywordflow">if</span> (newscore <a class="code" href="hmm_8h.html#a2874ab52613ff781c96f570ec0eb0d98" title="Is one score better than another?">BETTER_THAN</a> wordthresh) {
<a name="l00550"></a>00550 <a class="code" href="ngram__search_8c.html#ae36649be6f5a2190e759e7ed13bd7b6b" title="Enter a word in the backpointer table.">ngram_search_save_bp</a>(ngs, cf, w, newscore,
<a name="l00551"></a>00551 hmm_out_history(&rhmm-><a class="code" href="structroot__chan__s.html#a9d4d92ffa8b4079202ddebe3ba0eb290" title="Basic HMM structure.">hmm</a>), 0);
<a name="l00552"></a>00552 }
<a name="l00553"></a>00553 }
<a name="l00554"></a>00554 }
<a name="l00555"></a>00555
<a name="l00556"></a>00556 <span class="comment">/* Transitions out of non-root channels. */</span>
<a name="l00557"></a>00557 <span class="keywordflow">for</span> (hmm = rhmm-><a class="code" href="structroot__chan__s.html#ae0f0b90a7cb2fcb54cd7b30502dd497e" title="first descendant of this channel">next</a>; hmm; hmm = hmm-><a class="code" href="structchan__s.html#a260b68eff64150d0ae9ce4db7feb1300" title="first descendant of this channel; or, in the case of the last phone of a word, the next alternative r...">next</a>) {
<a name="l00558"></a>00558 <span class="keywordflow">if</span> (hmm_frame(&hmm-><a class="code" href="structchan__s.html#a742d6a125ac468b95a1ddd880a956e35" title="Basic HMM structure.">hmm</a>) >= cf) {
<a name="l00559"></a>00559 <span class="comment">/* Propagate forward HMMs inside the beam. */</span>
<a name="l00560"></a>00560 <span class="keywordflow">if</span> (hmm_bestscore(&hmm-><a class="code" href="structchan__s.html#a742d6a125ac468b95a1ddd880a956e35" title="Basic HMM structure.">hmm</a>) <a class="code" href="hmm_8h.html#a2874ab52613ff781c96f570ec0eb0d98" title="Is one score better than another?">BETTER_THAN</a> thresh) {
<a name="l00561"></a>00561 hmm_frame(&hmm-><a class="code" href="structchan__s.html#a742d6a125ac468b95a1ddd880a956e35" title="Basic HMM structure.">hmm</a>) = nf;
<a name="l00562"></a>00562 bitvec_set(ngs-><a class="code" href="structngram__search__s.html#aeb4c98851bf9b239ca607ca59f59ff4c" title="array of active flags for all words.">word_active</a>, w);
<a name="l00563"></a>00563
<a name="l00564"></a>00564 newscore = hmm_out_score(&hmm-><a class="code" href="structchan__s.html#a742d6a125ac468b95a1ddd880a956e35" title="Basic HMM structure.">hmm</a>);
<a name="l00565"></a>00565 <span class="comment">/* Word-internal phones */</span>
<a name="l00566"></a>00566 <span class="keywordflow">if</span> (hmm->info.<a class="code" href="structchan__s.html#acf84a2fa662e7ff626769e7d8152a608" title="right-context id for last phone of words">rc_id</a> < 0) {
<a name="l00567"></a>00567 newscore += pip;
<a name="l00568"></a>00568 <span class="keywordflow">if</span> (newscore <a class="code" href="hmm_8h.html#a2874ab52613ff781c96f570ec0eb0d98" title="Is one score better than another?">BETTER_THAN</a> thresh) {
<a name="l00569"></a>00569 nexthmm = hmm-><a class="code" href="structchan__s.html#a260b68eff64150d0ae9ce4db7feb1300" title="first descendant of this channel; or, in the case of the last phone of a word, the next alternative r...">next</a>;
<a name="l00570"></a>00570 <span class="comment">/* Enter all right-context phones. */</span>
<a name="l00571"></a>00571 <span class="keywordflow">if</span> (nexthmm->info.<a class="code" href="structchan__s.html#acf84a2fa662e7ff626769e7d8152a608" title="right-context id for last phone of words">rc_id</a> >= 0) {
<a name="l00572"></a>00572 <span class="keywordflow">for</span> (; nexthmm; nexthmm = nexthmm-><a class="code" href="structchan__s.html#a260b68eff64150d0ae9ce4db7feb1300" title="first descendant of this channel; or, in the case of the last phone of a word, the next alternative r...">next</a>) {
<a name="l00573"></a>00573 <span class="keywordflow">if</span> ((hmm_frame(&nexthmm-><a class="code" href="structchan__s.html#a742d6a125ac468b95a1ddd880a956e35" title="Basic HMM structure.">hmm</a>) < cf)
<a name="l00574"></a>00574 || (newscore <a class="code" href="hmm_8h.html#a2874ab52613ff781c96f570ec0eb0d98" title="Is one score better than another?">BETTER_THAN</a>
<a name="l00575"></a>00575 hmm_in_score(&nexthmm-><a class="code" href="structchan__s.html#a742d6a125ac468b95a1ddd880a956e35" title="Basic HMM structure.">hmm</a>))) {
<a name="l00576"></a>00576 hmm_enter(&nexthmm-><a class="code" href="structchan__s.html#a742d6a125ac468b95a1ddd880a956e35" title="Basic HMM structure.">hmm</a>,
<a name="l00577"></a>00577 newscore,
<a name="l00578"></a>00578 hmm_out_history(&hmm-><a class="code" href="structchan__s.html#a742d6a125ac468b95a1ddd880a956e35" title="Basic HMM structure.">hmm</a>),
<a name="l00579"></a>00579 nf);
<a name="l00580"></a>00580 }
<a name="l00581"></a>00581 }
<a name="l00582"></a>00582 }
<a name="l00583"></a>00583 <span class="comment">/* Enter single word-internal phone. */</span>
<a name="l00584"></a>00584 <span class="keywordflow">else</span> {
<a name="l00585"></a>00585 <span class="keywordflow">if</span> ((hmm_frame(&nexthmm-><a class="code" href="structchan__s.html#a742d6a125ac468b95a1ddd880a956e35" title="Basic HMM structure.">hmm</a>) < cf)
<a name="l00586"></a>00586 || (newscore <a class="code" href="hmm_8h.html#a2874ab52613ff781c96f570ec0eb0d98" title="Is one score better than another?">BETTER_THAN</a>
<a name="l00587"></a>00587 hmm_in_score(&nexthmm-><a class="code" href="structchan__s.html#a742d6a125ac468b95a1ddd880a956e35" title="Basic HMM structure.">hmm</a>))) {
<a name="l00588"></a>00588 hmm_enter(&nexthmm-><a class="code" href="structchan__s.html#a742d6a125ac468b95a1ddd880a956e35" title="Basic HMM structure.">hmm</a>, newscore,
<a name="l00589"></a>00589 hmm_out_history(&hmm-><a class="code" href="structchan__s.html#a742d6a125ac468b95a1ddd880a956e35" title="Basic HMM structure.">hmm</a>), nf);
<a name="l00590"></a>00590 }
<a name="l00591"></a>00591 }
<a name="l00592"></a>00592 }
<a name="l00593"></a>00593 }
<a name="l00594"></a>00594 <span class="comment">/* Right-context phones - apply word beam and exit. */</span>
<a name="l00595"></a>00595 <span class="keywordflow">else</span> {
<a name="l00596"></a>00596 <span class="keywordflow">if</span> (newscore <a class="code" href="hmm_8h.html#a2874ab52613ff781c96f570ec0eb0d98" title="Is one score better than another?">BETTER_THAN</a> wordthresh) {
<a name="l00597"></a>00597 <a class="code" href="ngram__search_8c.html#ae36649be6f5a2190e759e7ed13bd7b6b" title="Enter a word in the backpointer table.">ngram_search_save_bp</a>(ngs, cf, w, newscore,
<a name="l00598"></a>00598 hmm_out_history(&hmm-><a class="code" href="structchan__s.html#a742d6a125ac468b95a1ddd880a956e35" title="Basic HMM structure.">hmm</a>),
<a name="l00599"></a>00599 hmm->info.<a class="code" href="structchan__s.html#acf84a2fa662e7ff626769e7d8152a608" title="right-context id for last phone of words">rc_id</a>);
<a name="l00600"></a>00600 }
<a name="l00601"></a>00601 }
<a name="l00602"></a>00602 }
<a name="l00603"></a>00603 <span class="comment">/* Zero out inactive HMMs. */</span>
<a name="l00604"></a>00604 <span class="keywordflow">else</span> <span class="keywordflow">if</span> (hmm_frame(&hmm-><a class="code" href="structchan__s.html#a742d6a125ac468b95a1ddd880a956e35" title="Basic HMM structure.">hmm</a>) != nf) {
<a name="l00605"></a>00605 hmm_clear_scores(&hmm-><a class="code" href="structchan__s.html#a742d6a125ac468b95a1ddd880a956e35" title="Basic HMM structure.">hmm</a>);
<a name="l00606"></a>00606 }
<a name="l00607"></a>00607 }
<a name="l00608"></a>00608 }
<a name="l00609"></a>00609 }
<a name="l00610"></a>00610 }
<a name="l00611"></a>00611
<a name="l00612"></a>00612 <span class="keyword">static</span> <span class="keywordtype">void</span>
<a name="l00613"></a>00613 get_expand_wordlist(<a class="code" href="structngram__search__s.html" title="N-Gram search module structure.">ngram_search_t</a> *ngs, int32 frm, int32 win)
<a name="l00614"></a>00614 {
<a name="l00615"></a>00615 int32 f, sf, ef;
<a name="l00616"></a>00616 <a class="code" href="structps__latnode__s.html" title="DAG nodes.">ps_latnode_t</a> *node;
<a name="l00617"></a>00617
<a name="l00618"></a>00618 <span class="keywordflow">if</span> (!ngs->fwdtree) {
<a name="l00619"></a>00619 ngs-><a class="code" href="structngram__search__s.html#a5758d167fbb48e824a6a58186620e06d" title="Various statistics for profiling.">st</a>.n_fwdflat_word_transition += ngs->n_expand_words;
<a name="l00620"></a>00620 <span class="keywordflow">return</span>;
<a name="l00621"></a>00621 }
<a name="l00622"></a>00622
<a name="l00623"></a>00623 sf = frm - win;
<a name="l00624"></a>00624 <span class="keywordflow">if</span> (sf < 0)
<a name="l00625"></a>00625 sf = 0;
<a name="l00626"></a>00626 ef = frm + win;
<a name="l00627"></a>00627 <span class="keywordflow">if</span> (ef > ngs-><a class="code" href="structngram__search__s.html#a5255e56d28c239a4e1d9b1721e8a2f8d" title="Number of frames actually present.">n_frame</a>)
<a name="l00628"></a>00628 ef = ngs-><a class="code" href="structngram__search__s.html#a5255e56d28c239a4e1d9b1721e8a2f8d" title="Number of frames actually present.">n_frame</a>;
<a name="l00629"></a>00629
<a name="l00630"></a>00630 bitvec_clear_all(ngs->expand_word_flag, ps_search_n_words(ngs));
<a name="l00631"></a>00631 ngs->n_expand_words = 0;
<a name="l00632"></a>00632
<a name="l00633"></a>00633 <span class="keywordflow">for</span> (f = sf; f < ef; f++) {
<a name="l00634"></a>00634 <span class="keywordflow">for</span> (node = ngs-><a class="code" href="structngram__search__s.html#aa54544457c363ccccb87fc7ec63a5f3e" title="List of active words in each frame.">frm_wordlist</a>[f]; node; node = node-><a class="code" href="structps__latnode__s.html#aca6f3d543a1712a1ca3bb8ec60f71c84" title="Next node in DAG (no ordering implied)">next</a>) {
<a name="l00635"></a>00635 <span class="keywordflow">if</span> (!bitvec_is_set(ngs->expand_word_flag, node-><a class="code" href="structps__latnode__s.html#afd85dbd410d6e6d970c73088bc6fb97e" title="Dictionary word id.">wid</a>)) {
<a name="l00636"></a>00636 ngs->expand_word_list[ngs->n_expand_words++] = node-><a class="code" href="structps__latnode__s.html#afd85dbd410d6e6d970c73088bc6fb97e" title="Dictionary word id.">wid</a>;
<a name="l00637"></a>00637 bitvec_set(ngs->expand_word_flag, node-><a class="code" href="structps__latnode__s.html#afd85dbd410d6e6d970c73088bc6fb97e" title="Dictionary word id.">wid</a>);
<a name="l00638"></a>00638 }
<a name="l00639"></a>00639 }
<a name="l00640"></a>00640 }
<a name="l00641"></a>00641 ngs->expand_word_list[ngs->n_expand_words] = -1;
<a name="l00642"></a>00642 ngs-><a class="code" href="structngram__search__s.html#a5758d167fbb48e824a6a58186620e06d" title="Various statistics for profiling.">st</a>.n_fwdflat_word_transition += ngs->n_expand_words;
<a name="l00643"></a>00643 }
<a name="l00644"></a>00644
<a name="l00645"></a>00645 <span class="keyword">static</span> <span class="keywordtype">void</span>
<a name="l00646"></a>00646 fwdflat_word_transition(<a class="code" href="structngram__search__s.html" title="N-Gram search module structure.">ngram_search_t</a> *ngs, <span class="keywordtype">int</span> frame_idx)
<a name="l00647"></a>00647 {
<a name="l00648"></a>00648 int32 cf, nf, b, thresh, pip, i, w, newscore;
<a name="l00649"></a>00649 int32 best_silrc_score = 0, best_silrc_bp = 0; <span class="comment">/* FIXME: good defaults? */</span>
<a name="l00650"></a>00650 <a class="code" href="structbptbl__s.html" title="Back pointer table (forward pass lattice; actually a tree)">bptbl_t</a> *bp;
<a name="l00651"></a>00651 int32 *rcss;
<a name="l00652"></a>00652 <a class="code" href="structroot__chan__s.html" title="Lexical tree node data type for the first phone (root) of each dynamic HMM tree structure.">root_chan_t</a> *rhmm;
<a name="l00653"></a>00653 int32 *awl;
<a name="l00654"></a>00654 float32 lwf;
<a name="l00655"></a>00655 <a class="code" href="structdict__t.html" title="a structure for a dictionary.">dict_t</a> *dict = ps_search_dict(ngs);
<a name="l00656"></a>00656 <a class="code" href="structdict2pid__t.html" title="Building composite triphone (as well as word internal triphones) with the dictionary.">dict2pid_t</a> *d2p = ps_search_dict2pid(ngs);
<a name="l00657"></a>00657
<a name="l00658"></a>00658 cf = frame_idx;
<a name="l00659"></a>00659 nf = cf + 1;
<a name="l00660"></a>00660 thresh = ngs-><a class="code" href="structngram__search__s.html#a150d99157e2f37a6f0dbb4b02682d9c3" title="Best Viterbi path score.">best_score</a> + ngs->fwdflatbeam;
<a name="l00661"></a>00661 pip = ngs->pip;
<a name="l00662"></a>00662 best_silrc_score = <a class="code" href="hmm_8h.html#a833f100ee293ad0f1c03f2a5ef9be77a" title="Large &quot;bad&quot; score.">WORST_SCORE</a>;
<a name="l00663"></a>00663 lwf = ngs->fwdflat_fwdtree_lw_ratio;
<a name="l00664"></a>00664
<a name="l00665"></a>00665 <span class="comment">/* Search for all words starting within a window of this frame.</span>
<a name="l00666"></a>00666 <span class="comment"> * These are the successors for words exiting now. */</span>
<a name="l00667"></a>00667 get_expand_wordlist(ngs, cf, ngs->max_sf_win);
<a name="l00668"></a>00668
<a name="l00669"></a>00669 <span class="comment">/* Scan words exited in current frame */</span>
<a name="l00670"></a>00670 <span class="keywordflow">for</span> (b = ngs->bp_table_idx[cf]; b < ngs->bpidx; b++) {
<a name="l00671"></a>00671 <a class="code" href="structxwdssid__t.html" title="cross word triphone model structure">xwdssid_t</a> *rssid;
<a name="l00672"></a>00672 int32 silscore;
<a name="l00673"></a>00673
<a name="l00674"></a>00674 bp = ngs->bp_table + b;
<a name="l00675"></a>00675 ngs->word_lat_idx[bp-><a class="code" href="structbptbl__s.html#a143ff0891fafd471000df7c73123b8a7" title="Word index.">wid</a>] = NO_BP;
<a name="l00676"></a>00676
<a name="l00677"></a>00677 <span class="keywordflow">if</span> (bp-><a class="code" href="structbptbl__s.html#a143ff0891fafd471000df7c73123b8a7" title="Word index.">wid</a> == ps_search_finish_wid(ngs))
<a name="l00678"></a>00678 <span class="keywordflow">continue</span>;
<a name="l00679"></a>00679
<a name="l00680"></a>00680 <span class="comment">/* DICT2PID location */</span>
<a name="l00681"></a>00681 <span class="comment">/* Get the mapping from right context phone ID to index in the</span>
<a name="l00682"></a>00682 <span class="comment"> * right context table and the bscore_stack. */</span>
<a name="l00683"></a>00683 rcss = ngs->bscore_stack + bp-><a class="code" href="structbptbl__s.html#abf9e4bcf1927aa09fb2b30c59e99f551" title="Start of BScoreStack for various right contexts.">s_idx</a>;
<a name="l00684"></a>00684 <span class="keywordflow">if</span> (bp-><a class="code" href="structbptbl__s.html#a27b8e54bb7552e6afc15e4f44f42e3b7" title="next-to-last phone of this word">last2_phone</a> == -1)
<a name="l00685"></a>00685 rssid = NULL;
<a name="l00686"></a>00686 <span class="keywordflow">else</span>
<a name="l00687"></a>00687 rssid = <a class="code" href="dict2pid_8h.html#a453a98931cad95a19b4c4ab770fc79f1" title="Access macros; not designed for arbitrary use.">dict2pid_rssid</a>(d2p, bp-><a class="code" href="structbptbl__s.html#aa7704ba76d3dcde6b8a24855362a4289" title="last phone of this word">last_phone</a>, bp-><a class="code" href="structbptbl__s.html#a27b8e54bb7552e6afc15e4f44f42e3b7" title="next-to-last phone of this word">last2_phone</a>);
<a name="l00688"></a>00688
<a name="l00689"></a>00689 <span class="comment">/* Transition to all successor words. */</span>
<a name="l00690"></a>00690 <span class="keywordflow">for</span> (i = 0; ngs->expand_word_list[i] >= 0; i++) {
<a name="l00691"></a>00691 int32 n_used;
<a name="l00692"></a>00692
<a name="l00693"></a>00693 w = ngs->expand_word_list[i];
<a name="l00694"></a>00694
<a name="l00695"></a>00695 <span class="comment">/* Get the exit score we recorded in save_bwd_ptr(), or</span>
<a name="l00696"></a>00696 <span class="comment"> * something approximating it. */</span>
<a name="l00697"></a>00697 <span class="keywordflow">if</span> (rssid)
<a name="l00698"></a>00698 newscore = rcss[rssid-><a class="code" href="structxwdssid__t.html#a502f9241a70383aa260d3390e4ff58fb" title="Index into ssid[] above for each ci phone.">cimap</a>[dict_first_phone(dict, w)]];
<a name="l00699"></a>00699 <span class="keywordflow">else</span>
<a name="l00700"></a>00700 newscore = bp-><a class="code" href="structbptbl__s.html#aa5643c0c19ce4d39d51ddf7376f4d508" title="Score (best among all right contexts)">score</a>;
<a name="l00701"></a>00701 <span class="keywordflow">if</span> (newscore == <a class="code" href="hmm_8h.html#a833f100ee293ad0f1c03f2a5ef9be77a" title="Large &quot;bad&quot; score.">WORST_SCORE</a>)
<a name="l00702"></a>00702 <span class="keywordflow">continue</span>;
<a name="l00703"></a>00703 <span class="comment">/* FIXME: Floating point... */</span>
<a name="l00704"></a>00704 newscore += lwf
<a name="l00705"></a>00705 * (ngram_tg_score(ngs-><a class="code" href="structngram__search__s.html#a6127a6d8fb53832e67456c11aa6ad9c4" title="Set of language models.">lmset</a>,
<a name="l00706"></a>00706 dict_basewid(dict, w),
<a name="l00707"></a>00707 bp-><a class="code" href="structbptbl__s.html#a91247e4f807cf780afe8f5ac45e720b8" title="wid of this or latest predecessor real word">real_wid</a>,
<a name="l00708"></a>00708 bp-><a class="code" href="structbptbl__s.html#a83784e3b0121bc365d485151ab277920" title="wid of second-last real word">prev_real_wid</a>,
<a name="l00709"></a>00709 &n_used) >> <a class="code" href="hmm_8h.html#af94da16e3e5b550b9be05b0f07402cc7" title="Shift count for senone scores.">SENSCR_SHIFT</a>);
<a name="l00710"></a>00710 newscore += pip;
<a name="l00711"></a>00711
<a name="l00712"></a>00712 <span class="comment">/* Enter the next word */</span>
<a name="l00713"></a>00713 <span class="keywordflow">if</span> (newscore <a class="code" href="hmm_8h.html#a2874ab52613ff781c96f570ec0eb0d98" title="Is one score better than another?">BETTER_THAN</a> thresh) {
<a name="l00714"></a>00714 rhmm = (<a class="code" href="structroot__chan__s.html" title="Lexical tree node data type for the first phone (root) of each dynamic HMM tree structure.">root_chan_t</a> *) ngs-><a class="code" href="structngram__search__s.html#a79deb7295a261cd82d2a6b48cb119e77" title="Channels associated with a given word (only used for right contexts, single-phone words in fwdtree se...">word_chan</a>[w];
<a name="l00715"></a>00715 if ((hmm_frame(&rhmm-><a class="code" href="structroot__chan__s.html#a9d4d92ffa8b4079202ddebe3ba0eb290" title="Basic HMM structure.">hmm</a>) < cf)
<a name="l00716"></a>00716 || (newscore <a class="code" href="hmm_8h.html#a2874ab52613ff781c96f570ec0eb0d98" title="Is one score better than another?">BETTER_THAN</a> hmm_in_score(&rhmm-><a class="code" href="structroot__chan__s.html#a9d4d92ffa8b4079202ddebe3ba0eb290" title="Basic HMM structure.">hmm</a>))) {
<a name="l00717"></a>00717 hmm_enter(&rhmm-><a class="code" href="structroot__chan__s.html#a9d4d92ffa8b4079202ddebe3ba0eb290" title="Basic HMM structure.">hmm</a>, newscore, b, nf);
<a name="l00718"></a>00718 <span class="comment">/* DICT2PID: This is where mpx ssids get introduced. */</span>
<a name="l00719"></a>00719 <span class="comment">/* Look up the ssid to use when entering this mpx triphone. */</span>
<a name="l00720"></a>00720 hmm_mpx_ssid(&rhmm-><a class="code" href="structroot__chan__s.html#a9d4d92ffa8b4079202ddebe3ba0eb290" title="Basic HMM structure.">hmm</a>, 0) =
<a name="l00721"></a>00721 dict2pid_ldiph_lc(d2p, rhmm-><a class="code" href="structroot__chan__s.html#ad67c37bf4183f518acd7760c09a806f6" title="first ciphone of this node; all words rooted at this node begin with this ciphone">ciphone</a>, rhmm-><a class="code" href="structroot__chan__s.html#a0c0cf22caf4c97879af86865764f1675" title="second ciphone of this node; one root HMM for each unique right context">ci2phone</a>,
<a name="l00722"></a>00722 dict_last_phone(dict, bp-><a class="code" href="structbptbl__s.html#a143ff0891fafd471000df7c73123b8a7" title="Word index.">wid</a>));
<a name="l00723"></a>00723 assert(IS_S3SSID(hmm_mpx_ssid(&rhmm-><a class="code" href="structroot__chan__s.html#a9d4d92ffa8b4079202ddebe3ba0eb290" title="Basic HMM structure.">hmm</a>, 0)));
<a name="l00724"></a>00724 E_DEBUG(6,(<span class="stringliteral">"ssid %d(%d,%d) = %d\n"</span>,
<a name="l00725"></a>00725 rhmm-><a class="code" href="structroot__chan__s.html#ad67c37bf4183f518acd7760c09a806f6" title="first ciphone of this node; all words rooted at this node begin with this ciphone">ciphone</a>, dict_last_phone(dict, bp-><a class="code" href="structbptbl__s.html#a143ff0891fafd471000df7c73123b8a7" title="Word index.">wid</a>), rhmm-><a class="code" href="structroot__chan__s.html#a0c0cf22caf4c97879af86865764f1675" title="second ciphone of this node; one root HMM for each unique right context">ci2phone</a>,
<a name="l00726"></a>00726 hmm_mpx_ssid(&rhmm-><a class="code" href="structroot__chan__s.html#a9d4d92ffa8b4079202ddebe3ba0eb290" title="Basic HMM structure.">hmm</a>, 0)));
<a name="l00727"></a>00727 bitvec_set(ngs-><a class="code" href="structngram__search__s.html#aeb4c98851bf9b239ca607ca59f59ff4c" title="array of active flags for all words.">word_active</a>, w);
<a name="l00728"></a>00728 }
<a name="l00729"></a>00729 }
<a name="l00730"></a>00730 }
<a name="l00731"></a>00731
<a name="l00732"></a>00732 <span class="comment">/* Get the best exit into silence. */</span>
<a name="l00733"></a>00733 <span class="keywordflow">if</span> (rssid)
<a name="l00734"></a>00734 silscore = rcss[rssid-><a class="code" href="structxwdssid__t.html#a502f9241a70383aa260d3390e4ff58fb" title="Index into ssid[] above for each ci phone.">cimap</a>[ps_search_acmod(ngs)->mdef->sil]];
<a name="l00735"></a>00735 <span class="keywordflow">else</span>
<a name="l00736"></a>00736 silscore = bp-><a class="code" href="structbptbl__s.html#aa5643c0c19ce4d39d51ddf7376f4d508" title="Score (best among all right contexts)">score</a>;
<a name="l00737"></a>00737 <span class="keywordflow">if</span> (silscore <a class="code" href="hmm_8h.html#a2874ab52613ff781c96f570ec0eb0d98" title="Is one score better than another?">BETTER_THAN</a> best_silrc_score) {
<a name="l00738"></a>00738 best_silrc_score = silscore;
<a name="l00739"></a>00739 best_silrc_bp = b;
<a name="l00740"></a>00740 }
<a name="l00741"></a>00741 }
<a name="l00742"></a>00742
<a name="l00743"></a>00743 <span class="comment">/* Transition to <sil> */</span>
<a name="l00744"></a>00744 newscore = best_silrc_score + ngs->silpen + pip;
<a name="l00745"></a>00745 <span class="keywordflow">if</span> ((newscore <a class="code" href="hmm_8h.html#a2874ab52613ff781c96f570ec0eb0d98" title="Is one score better than another?">BETTER_THAN</a> thresh) && (newscore <a class="code" href="hmm_8h.html#a2874ab52613ff781c96f570ec0eb0d98" title="Is one score better than another?">BETTER_THAN</a> <a class="code" href="hmm_8h.html#a833f100ee293ad0f1c03f2a5ef9be77a" title="Large &quot;bad&quot; score.">WORST_SCORE</a>)) {
<a name="l00746"></a>00746 w = ps_search_silence_wid(ngs);
<a name="l00747"></a>00747 rhmm = (<a class="code" href="structroot__chan__s.html" title="Lexical tree node data type for the first phone (root) of each dynamic HMM tree structure.">root_chan_t</a> *) ngs-><a class="code" href="structngram__search__s.html#a79deb7295a261cd82d2a6b48cb119e77" title="Channels associated with a given word (only used for right contexts, single-phone words in fwdtree se...">word_chan</a>[w];
<a name="l00748"></a>00748 if ((hmm_frame(&rhmm-><a class="code" href="structroot__chan__s.html#a9d4d92ffa8b4079202ddebe3ba0eb290" title="Basic HMM structure.">hmm</a>) < cf)
<a name="l00749"></a>00749 || (newscore <a class="code" href="hmm_8h.html#a2874ab52613ff781c96f570ec0eb0d98" title="Is one score better than another?">BETTER_THAN</a> hmm_in_score(&rhmm-><a class="code" href="structroot__chan__s.html#a9d4d92ffa8b4079202ddebe3ba0eb290" title="Basic HMM structure.">hmm</a>))) {
<a name="l00750"></a>00750 hmm_enter(&rhmm-><a class="code" href="structroot__chan__s.html#a9d4d92ffa8b4079202ddebe3ba0eb290" title="Basic HMM structure.">hmm</a>, newscore,
<a name="l00751"></a>00751 best_silrc_bp, nf);
<a name="l00752"></a>00752 bitvec_set(ngs-><a class="code" href="structngram__search__s.html#aeb4c98851bf9b239ca607ca59f59ff4c" title="array of active flags for all words.">word_active</a>, w);
<a name="l00753"></a>00753 }
<a name="l00754"></a>00754 }
<a name="l00755"></a>00755 <span class="comment">/* Transition to noise words */</span>
<a name="l00756"></a>00756 newscore = best_silrc_score + ngs->fillpen + pip;
<a name="l00757"></a>00757 <span class="keywordflow">if</span> ((newscore <a class="code" href="hmm_8h.html#a2874ab52613ff781c96f570ec0eb0d98" title="Is one score better than another?">BETTER_THAN</a> thresh) && (newscore <a class="code" href="hmm_8h.html#a2874ab52613ff781c96f570ec0eb0d98" title="Is one score better than another?">BETTER_THAN</a> WORST_SCORE)) {
<a name="l00758"></a>00758 <span class="keywordflow">for</span> (w = ps_search_silence_wid(ngs) + 1; w < ps_search_n_words(ngs); w++) {
<a name="l00759"></a>00759 rhmm = (<a class="code" href="structroot__chan__s.html" title="Lexical tree node data type for the first phone (root) of each dynamic HMM tree structure.">root_chan_t</a> *) ngs-><a class="code" href="structngram__search__s.html#a79deb7295a261cd82d2a6b48cb119e77" title="Channels associated with a given word (only used for right contexts, single-phone words in fwdtree se...">word_chan</a>[w];
<a name="l00760"></a>00760 <span class="comment">/* Noise words that aren't a single phone will have NULL here. */</span>
<a name="l00761"></a>00761 if (rhmm == NULL)
<a name="l00762"></a>00762 <span class="keywordflow">continue</span>;
<a name="l00763"></a>00763 <span class="keywordflow">if</span> ((hmm_frame(&rhmm-><a class="code" href="structroot__chan__s.html#a9d4d92ffa8b4079202ddebe3ba0eb290" title="Basic HMM structure.">hmm</a>) < cf)
<a name="l00764"></a>00764 || (newscore <a class="code" href="hmm_8h.html#a2874ab52613ff781c96f570ec0eb0d98" title="Is one score better than another?">BETTER_THAN</a> hmm_in_score(&rhmm-><a class="code" href="structroot__chan__s.html#a9d4d92ffa8b4079202ddebe3ba0eb290" title="Basic HMM structure.">hmm</a>))) {
<a name="l00765"></a>00765 hmm_enter(&rhmm-><a class="code" href="structroot__chan__s.html#a9d4d92ffa8b4079202ddebe3ba0eb290" title="Basic HMM structure.">hmm</a>, newscore,
<a name="l00766"></a>00766 best_silrc_bp, nf);
<a name="l00767"></a>00767 bitvec_set(ngs-><a class="code" href="structngram__search__s.html#aeb4c98851bf9b239ca607ca59f59ff4c" title="array of active flags for all words.">word_active</a>, w);
<a name="l00768"></a>00768 }
<a name="l00769"></a>00769 }
<a name="l00770"></a>00770 }
<a name="l00771"></a>00771
<a name="l00772"></a>00772 <span class="comment">/* Reset initial channels of words that have become inactive even after word trans. */</span>
<a name="l00773"></a>00773 i = ngs-><a class="code" href="structngram__search__s.html#a5c864f1fe331fc95c04e0d87a5bdf9ee" title="Number entries in active_word_list.">n_active_word</a>[cf & 0x1];
<a name="l00774"></a>00774 awl = ngs-><a class="code" href="structngram__search__s.html#a5056573bf95990cc28c97a56cd76ce9a" title="Array of active multi-phone words for current and next frame.">active_word_list</a>[cf & 0x1];
<a name="l00775"></a>00775 <span class="keywordflow">for</span> (w = *(awl++); i > 0; --i, w = *(awl++)) {
<a name="l00776"></a>00776 rhmm = (<a class="code" href="structroot__chan__s.html" title="Lexical tree node data type for the first phone (root) of each dynamic HMM tree structure.">root_chan_t</a> *) ngs-><a class="code" href="structngram__search__s.html#a79deb7295a261cd82d2a6b48cb119e77" title="Channels associated with a given word (only used for right contexts, single-phone words in fwdtree se...">word_chan</a>[w];
<a name="l00777"></a>00777 if (hmm_frame(&rhmm-><a class="code" href="structroot__chan__s.html#a9d4d92ffa8b4079202ddebe3ba0eb290" title="Basic HMM structure.">hmm</a>) == cf) {
<a name="l00778"></a>00778 hmm_clear_scores(&rhmm-><a class="code" href="structroot__chan__s.html#a9d4d92ffa8b4079202ddebe3ba0eb290" title="Basic HMM structure.">hmm</a>);
<a name="l00779"></a>00779 }
<a name="l00780"></a>00780 }
<a name="l00781"></a>00781 }
<a name="l00782"></a>00782
<a name="l00783"></a>00783 <span class="keyword">static</span> <span class="keywordtype">void</span>
<a name="l00784"></a>00784 fwdflat_renormalize_scores(<a class="code" href="structngram__search__s.html" title="N-Gram search module structure.">ngram_search_t</a> *ngs, <span class="keywordtype">int</span> frame_idx, int32 norm)
<a name="l00785"></a>00785 {
<a name="l00786"></a>00786 <a class="code" href="structroot__chan__s.html" title="Lexical tree node data type for the first phone (root) of each dynamic HMM tree structure.">root_chan_t</a> *rhmm;
<a name="l00787"></a>00787 <a class="code" href="structchan__s.html" title="Lexical tree node data type.">chan_t</a> *hmm;
<a name="l00788"></a>00788 int32 i, cf, w, *awl;
<a name="l00789"></a>00789
<a name="l00790"></a>00790 cf = frame_idx;
<a name="l00791"></a>00791
<a name="l00792"></a>00792 <span class="comment">/* Renormalize individual word channels */</span>
<a name="l00793"></a>00793 i = ngs-><a class="code" href="structngram__search__s.html#a5c864f1fe331fc95c04e0d87a5bdf9ee" title="Number entries in active_word_list.">n_active_word</a>[cf & 0x1];
<a name="l00794"></a>00794 awl = ngs-><a class="code" href="structngram__search__s.html#a5056573bf95990cc28c97a56cd76ce9a" title="Array of active multi-phone words for current and next frame.">active_word_list</a>[cf & 0x1];
<a name="l00795"></a>00795 <span class="keywordflow">for</span> (w = *(awl++); i > 0; --i, w = *(awl++)) {
<a name="l00796"></a>00796 rhmm = (<a class="code" href="structroot__chan__s.html" title="Lexical tree node data type for the first phone (root) of each dynamic HMM tree structure.">root_chan_t</a> *) ngs-><a class="code" href="structngram__search__s.html#a79deb7295a261cd82d2a6b48cb119e77" title="Channels associated with a given word (only used for right contexts, single-phone words in fwdtree se...">word_chan</a>[w];
<a name="l00797"></a>00797 if (hmm_frame(&rhmm-><a class="code" href="structroot__chan__s.html#a9d4d92ffa8b4079202ddebe3ba0eb290" title="Basic HMM structure.">hmm</a>) == cf) {
<a name="l00798"></a>00798 hmm_normalize(&rhmm-><a class="code" href="structroot__chan__s.html#a9d4d92ffa8b4079202ddebe3ba0eb290" title="Basic HMM structure.">hmm</a>, norm);
<a name="l00799"></a>00799 }
<a name="l00800"></a>00800 <span class="keywordflow">for</span> (hmm = rhmm-><a class="code" href="structroot__chan__s.html#ae0f0b90a7cb2fcb54cd7b30502dd497e" title="first descendant of this channel">next</a>; hmm; hmm = hmm-><a class="code" href="structchan__s.html#a260b68eff64150d0ae9ce4db7feb1300" title="first descendant of this channel; or, in the case of the last phone of a word, the next alternative r...">next</a>) {
<a name="l00801"></a>00801 <span class="keywordflow">if</span> (hmm_frame(&hmm-><a class="code" href="structchan__s.html#a742d6a125ac468b95a1ddd880a956e35" title="Basic HMM structure.">hmm</a>) == cf) {
<a name="l00802"></a>00802 hmm_normalize(&hmm-><a class="code" href="structchan__s.html#a742d6a125ac468b95a1ddd880a956e35" title="Basic HMM structure.">hmm</a>, norm);
<a name="l00803"></a>00803 }
<a name="l00804"></a>00804 }
<a name="l00805"></a>00805 }
<a name="l00806"></a>00806
<a name="l00807"></a>00807 ngs->renormalized = TRUE;
<a name="l00808"></a>00808 }
<a name="l00809"></a>00809
<a name="l00810"></a>00810 <span class="keywordtype">int</span>
<a name="l00811"></a><a class="code" href="ngram__search__fwdflat_8h.html#ae77ef21ae92dbcc4b14f40469fbd4307">00811</a> <a class="code" href="ngram__search__fwdflat_8c.html#ae77ef21ae92dbcc4b14f40469fbd4307" title="Search one frame forward in an utterance.">ngram_fwdflat_search</a>(<a class="code" href="structngram__search__s.html" title="N-Gram search module structure.">ngram_search_t</a> *ngs, <span class="keywordtype">int</span> frame_idx)
<a name="l00812"></a>00812 {
<a name="l00813"></a>00813 int16 <span class="keyword">const</span> *senscr;
<a name="l00814"></a>00814 int32 nf, i, j;
<a name="l00815"></a>00815 int32 *nawl;
<a name="l00816"></a>00816
<a name="l00817"></a>00817 <span class="comment">/* Activate our HMMs for the current frame if need be. */</span>
<a name="l00818"></a>00818 <span class="keywordflow">if</span> (!ps_search_acmod(ngs)->compallsen)
<a name="l00819"></a>00819 compute_fwdflat_sen_active(ngs, frame_idx);
<a name="l00820"></a>00820
<a name="l00821"></a>00821 <span class="comment">/* Compute GMM scores for the current frame. */</span>
<a name="l00822"></a>00822 senscr = <a class="code" href="acmod_8c.html#acd78e9bae06724df9c53f844d90c1c8a" title="Score one frame of data.">acmod_score</a>(ps_search_acmod(ngs), &frame_idx);
<a name="l00823"></a>00823 ngs-><a class="code" href="structngram__search__s.html#a5758d167fbb48e824a6a58186620e06d" title="Various statistics for profiling.">st</a>.n_senone_active_utt += ps_search_acmod(ngs)->n_senone_active;
<a name="l00824"></a>00824
<a name="l00825"></a>00825 <span class="comment">/* Mark backpointer table for current frame. */</span>
<a name="l00826"></a>00826 <a class="code" href="ngram__search_8c.html#a7772e007b7d7fdf437c87aeb08b59c71" title="Record the current frame&#39;s index in the backpointer table.">ngram_search_mark_bptable</a>(ngs, frame_idx);
<a name="l00827"></a>00827
<a name="l00828"></a>00828 <span class="comment">/* If the best score is equal to or worse than WORST_SCORE,</span>
<a name="l00829"></a>00829 <span class="comment"> * recognition has failed, don't bother to keep trying. */</span>
<a name="l00830"></a>00830 <span class="keywordflow">if</span> (ngs-><a class="code" href="structngram__search__s.html#a150d99157e2f37a6f0dbb4b02682d9c3" title="Best Viterbi path score.">best_score</a> == WORST_SCORE || ngs-><a class="code" href="structngram__search__s.html#a150d99157e2f37a6f0dbb4b02682d9c3" title="Best Viterbi path score.">best_score</a> <a class="code" href="hmm_8h.html#aa930fb8fb6fce7f34bcf4018b81d7066" title="Is one score worse than another?">WORSE_THAN</a> WORST_SCORE)
<a name="l00831"></a>00831 <span class="keywordflow">return</span> 0;
<a name="l00832"></a>00832 <span class="comment">/* Renormalize if necessary */</span>
<a name="l00833"></a>00833 <span class="keywordflow">if</span> (ngs-><a class="code" href="structngram__search__s.html#a150d99157e2f37a6f0dbb4b02682d9c3" title="Best Viterbi path score.">best_score</a> + (2 * ngs->beam) <a class="code" href="hmm_8h.html#aa930fb8fb6fce7f34bcf4018b81d7066" title="Is one score worse than another?">WORSE_THAN</a> WORST_SCORE) {
<a name="l00834"></a>00834 E_INFO(<span class="stringliteral">"Renormalizing Scores at frame %d, best score %d\n"</span>,
<a name="l00835"></a>00835 frame_idx, ngs-><a class="code" href="structngram__search__s.html#a150d99157e2f37a6f0dbb4b02682d9c3" title="Best Viterbi path score.">best_score</a>);
<a name="l00836"></a>00836 fwdflat_renormalize_scores(ngs, frame_idx, ngs-><a class="code" href="structngram__search__s.html#a150d99157e2f37a6f0dbb4b02682d9c3" title="Best Viterbi path score.">best_score</a>);
<a name="l00837"></a>00837 }
<a name="l00838"></a>00838
<a name="l00839"></a>00839 ngs-><a class="code" href="structngram__search__s.html#a150d99157e2f37a6f0dbb4b02682d9c3" title="Best Viterbi path score.">best_score</a> = <a class="code" href="hmm_8h.html#a833f100ee293ad0f1c03f2a5ef9be77a" title="Large &quot;bad&quot; score.">WORST_SCORE</a>;
<a name="l00840"></a>00840 <a class="code" href="hmm_8h.html#a44d0b5515cb269bf9b95f62aada18cbb" title="Change the senone score array for a context.">hmm_context_set_senscore</a>(ngs-><a class="code" href="structngram__search__s.html#acfbdd34e3dadbaa384818402f1dd59bf" title="HMM context.">hmmctx</a>, senscr);
<a name="l00841"></a>00841
<a name="l00842"></a>00842 <span class="comment">/* Evaluate HMMs */</span>
<a name="l00843"></a>00843 fwdflat_eval_chan(ngs, frame_idx);
<a name="l00844"></a>00844 <span class="comment">/* Prune HMMs and do phone transitions. */</span>
<a name="l00845"></a>00845 fwdflat_prune_chan(ngs, frame_idx);
<a name="l00846"></a>00846 <span class="comment">/* Do word transitions. */</span>
<a name="l00847"></a>00847 fwdflat_word_transition(ngs, frame_idx);
<a name="l00848"></a>00848
<a name="l00849"></a>00849 <span class="comment">/* Create next active word list */</span>
<a name="l00850"></a>00850 nf = frame_idx + 1;
<a name="l00851"></a>00851 nawl = ngs-><a class="code" href="structngram__search__s.html#a5056573bf95990cc28c97a56cd76ce9a" title="Array of active multi-phone words for current and next frame.">active_word_list</a>[nf & 0x1];
<a name="l00852"></a>00852 <span class="keywordflow">for</span> (i = 0, j = 0; ngs-><a class="code" href="structngram__search__s.html#a774f1640c5ece856f4bef98d98e7c959" title="List of active word IDs for utterance.">fwdflat_wordlist</a>[i] >= 0; i++) {
<a name="l00853"></a>00853 <span class="keywordflow">if</span> (bitvec_is_set(ngs-><a class="code" href="structngram__search__s.html#aeb4c98851bf9b239ca607ca59f59ff4c" title="array of active flags for all words.">word_active</a>, ngs-><a class="code" href="structngram__search__s.html#a774f1640c5ece856f4bef98d98e7c959" title="List of active word IDs for utterance.">fwdflat_wordlist</a>[i])) {
<a name="l00854"></a>00854 *(nawl++) = ngs-><a class="code" href="structngram__search__s.html#a774f1640c5ece856f4bef98d98e7c959" title="List of active word IDs for utterance.">fwdflat_wordlist</a>[i];
<a name="l00855"></a>00855 j++;
<a name="l00856"></a>00856 }
<a name="l00857"></a>00857 }
<a name="l00858"></a>00858 <span class="keywordflow">for</span> (i = ps_search_start_wid(ngs); i < ps_search_n_words(ngs); i++) {
<a name="l00859"></a>00859 <span class="keywordflow">if</span> (bitvec_is_set(ngs-><a class="code" href="structngram__search__s.html#aeb4c98851bf9b239ca607ca59f59ff4c" title="array of active flags for all words.">word_active</a>, i)) {
<a name="l00860"></a>00860 *(nawl++) = i;
<a name="l00861"></a>00861 j++;
<a name="l00862"></a>00862 }
<a name="l00863"></a>00863 }
<a name="l00864"></a>00864 <span class="keywordflow">if</span> (!ngs->fwdtree)
<a name="l00865"></a>00865 ++ngs-><a class="code" href="structngram__search__s.html#a5255e56d28c239a4e1d9b1721e8a2f8d" title="Number of frames actually present.">n_frame</a>;
<a name="l00866"></a>00866 ngs-><a class="code" href="structngram__search__s.html#a5c864f1fe331fc95c04e0d87a5bdf9ee" title="Number entries in active_word_list.">n_active_word</a>[nf & 0x1] = j;
<a name="l00867"></a>00867
<a name="l00868"></a>00868 <span class="comment">/* Return the number of frames processed. */</span>
<a name="l00869"></a>00869 <span class="keywordflow">return</span> 1;
<a name="l00870"></a>00870 }
<a name="l00871"></a>00871
<a name="l00875"></a>00875 <span class="keyword">static</span> <span class="keywordtype">void</span>
<a name="l00876"></a>00876 destroy_fwdflat_wordlist(<a class="code" href="structngram__search__s.html" title="N-Gram search module structure.">ngram_search_t</a> *ngs)
<a name="l00877"></a>00877 {
<a name="l00878"></a>00878 <a class="code" href="structps__latnode__s.html" title="DAG nodes.">ps_latnode_t</a> *node, *tnode;
<a name="l00879"></a>00879 int32 f;
<a name="l00880"></a>00880
<a name="l00881"></a>00881 <span class="keywordflow">if</span> (!ngs->fwdtree)
<a name="l00882"></a>00882 <span class="keywordflow">return</span>;
<a name="l00883"></a>00883
<a name="l00884"></a>00884 <span class="keywordflow">for</span> (f = 0; f < ngs-><a class="code" href="structngram__search__s.html#a5255e56d28c239a4e1d9b1721e8a2f8d" title="Number of frames actually present.">n_frame</a>; f++) {
<a name="l00885"></a>00885 <span class="keywordflow">for</span> (node = ngs-><a class="code" href="structngram__search__s.html#aa54544457c363ccccb87fc7ec63a5f3e" title="List of active words in each frame.">frm_wordlist</a>[f]; node; node = tnode) {
<a name="l00886"></a>00886 tnode = node-><a class="code" href="structps__latnode__s.html#aca6f3d543a1712a1ca3bb8ec60f71c84" title="Next node in DAG (no ordering implied)">next</a>;
<a name="l00887"></a>00887 listelem_free(ngs-><a class="code" href="structngram__search__s.html#a21600dc2e23744f0be9c64a4db8d7e50" title="For latnode_t.">latnode_alloc</a>, node);
<a name="l00888"></a>00888 }
<a name="l00889"></a>00889 }
<a name="l00890"></a>00890 }
<a name="l00891"></a>00891
<a name="l00895"></a>00895 <span class="keyword">static</span> <span class="keywordtype">void</span>
<a name="l00896"></a>00896 destroy_fwdflat_chan(<a class="code" href="structngram__search__s.html" title="N-Gram search module structure.">ngram_search_t</a> *ngs)
<a name="l00897"></a>00897 {
<a name="l00898"></a>00898 int32 i, wid;
<a name="l00899"></a>00899
<a name="l00900"></a>00900 <span class="keywordflow">for</span> (i = 0; ngs-><a class="code" href="structngram__search__s.html#a774f1640c5ece856f4bef98d98e7c959" title="List of active word IDs for utterance.">fwdflat_wordlist</a>[i] >= 0; i++) {
<a name="l00901"></a>00901 <a class="code" href="structroot__chan__s.html" title="Lexical tree node data type for the first phone (root) of each dynamic HMM tree structure.">root_chan_t</a> *rhmm;
<a name="l00902"></a>00902 <a class="code" href="structchan__s.html" title="Lexical tree node data type.">chan_t</a> *thmm;
<a name="l00903"></a>00903 wid = ngs-><a class="code" href="structngram__search__s.html#a774f1640c5ece856f4bef98d98e7c959" title="List of active word IDs for utterance.">fwdflat_wordlist</a>[i];
<a name="l00904"></a>00904 <span class="keywordflow">if</span> (dict_is_single_phone(ps_search_dict(ngs),wid))
<a name="l00905"></a>00905 <span class="keywordflow">continue</span>;
<a name="l00906"></a>00906 assert(ngs-><a class="code" href="structngram__search__s.html#a79deb7295a261cd82d2a6b48cb119e77" title="Channels associated with a given word (only used for right contexts, single-phone words in fwdtree se...">word_chan</a>[wid] != NULL);
<a name="l00907"></a>00907
<a name="l00908"></a>00908 <span class="comment">/* The first HMM in ngs->word_chan[wid] was allocated with</span>
<a name="l00909"></a>00909 <span class="comment"> * ngs->root_chan_alloc, but this will attempt to free it</span>
<a name="l00910"></a>00910 <span class="comment"> * using ngs->chan_alloc, which will not work. Therefore we</span>
<a name="l00911"></a>00911 <span class="comment"> * free it manually and move the list forward before handing</span>
<a name="l00912"></a>00912 <span class="comment"> * it off. */</span>
<a name="l00913"></a>00913 rhmm = (<a class="code" href="structroot__chan__s.html" title="Lexical tree node data type for the first phone (root) of each dynamic HMM tree structure.">root_chan_t</a> *)ngs-><a class="code" href="structngram__search__s.html#a79deb7295a261cd82d2a6b48cb119e77" title="Channels associated with a given word (only used for right contexts, single-phone words in fwdtree se...">word_chan</a>[wid];
<a name="l00914"></a>00914 thmm = rhmm-><a class="code" href="structroot__chan__s.html#ae0f0b90a7cb2fcb54cd7b30502dd497e" title="first descendant of this channel">next</a>;
<a name="l00915"></a>00915 listelem_free(ngs-><a class="code" href="structngram__search__s.html#a576470858bfa44c671f0e677902ab424" title="For root_chan_t.">root_chan_alloc</a>, rhmm);
<a name="l00916"></a>00916 ngs-><a class="code" href="structngram__search__s.html#a79deb7295a261cd82d2a6b48cb119e77" title="Channels associated with a given word (only used for right contexts, single-phone words in fwdtree se...">word_chan</a>[wid] = thmm;
<a name="l00917"></a>00917 <a class="code" href="ngram__search_8c.html#a15477192481dffcb29e9c4167eff6c3c" title="Allocate last phone channels for all possible right contexts for word w.">ngram_search_free_all_rc</a>(ngs, wid);
<a name="l00918"></a>00918 }
<a name="l00919"></a>00919 }
<a name="l00920"></a>00920
<a name="l00921"></a>00921 <span class="keywordtype">void</span>
<a name="l00922"></a><a class="code" href="ngram__search__fwdflat_8h.html#ac855cf540ac4acdfa320629720ded6fe">00922</a> <a class="code" href="ngram__search__fwdflat_8c.html#ac855cf540ac4acdfa320629720ded6fe" title="Finish fwdflat decoding for an utterance.">ngram_fwdflat_finish</a>(<a class="code" href="structngram__search__s.html" title="N-Gram search module structure.">ngram_search_t</a> *ngs)
<a name="l00923"></a>00923 {
<a name="l00924"></a>00924 int32 cf;
<a name="l00925"></a>00925
<a name="l00926"></a>00926 destroy_fwdflat_chan(ngs);
<a name="l00927"></a>00927 destroy_fwdflat_wordlist(ngs);
<a name="l00928"></a>00928 bitvec_clear_all(ngs-><a class="code" href="structngram__search__s.html#aeb4c98851bf9b239ca607ca59f59ff4c" title="array of active flags for all words.">word_active</a>, ps_search_n_words(ngs));
<a name="l00929"></a>00929
<a name="l00930"></a>00930 <span class="comment">/* This is the number of frames processed. */</span>
<a name="l00931"></a>00931 cf = ps_search_acmod(ngs)->output_frame;
<a name="l00932"></a>00932 <span class="comment">/* Add a mark in the backpointer table for one past the final frame. */</span>
<a name="l00933"></a>00933 <a class="code" href="ngram__search_8c.html#a7772e007b7d7fdf437c87aeb08b59c71" title="Record the current frame&#39;s index in the backpointer table.">ngram_search_mark_bptable</a>(ngs, cf);
<a name="l00934"></a>00934
<a name="l00935"></a>00935 ptmr_stop(&ngs->fwdflat_perf);
<a name="l00936"></a>00936 <span class="comment">/* Print out some statistics. */</span>
<a name="l00937"></a>00937 <span class="keywordflow">if</span> (cf > 0) {
<a name="l00938"></a>00938 <span class="keywordtype">double</span> n_speech = (double)(cf + 1)
<a name="l00939"></a>00939 / cmd_ln_int32_r(ps_search_config(ngs), <span class="stringliteral">"-frate"</span>);
<a name="l00940"></a>00940 E_INFO(<span class="stringliteral">"%8d words recognized (%d/fr)\n"</span>,
<a name="l00941"></a>00941 ngs->bpidx, (ngs->bpidx + (cf >> 1)) / (cf + 1));
<a name="l00942"></a>00942 E_INFO(<span class="stringliteral">"%8d senones evaluated (%d/fr)\n"</span>, ngs-><a class="code" href="structngram__search__s.html#a5758d167fbb48e824a6a58186620e06d" title="Various statistics for profiling.">st</a>.n_senone_active_utt,
<a name="l00943"></a>00943 (ngs-><a class="code" href="structngram__search__s.html#a5758d167fbb48e824a6a58186620e06d" title="Various statistics for profiling.">st</a>.n_senone_active_utt + (cf >> 1)) / (cf + 1));
<a name="l00944"></a>00944 E_INFO(<span class="stringliteral">"%8d channels searched (%d/fr)\n"</span>,
<a name="l00945"></a>00945 ngs-><a class="code" href="structngram__search__s.html#a5758d167fbb48e824a6a58186620e06d" title="Various statistics for profiling.">st</a>.n_fwdflat_chan, ngs-><a class="code" href="structngram__search__s.html#a5758d167fbb48e824a6a58186620e06d" title="Various statistics for profiling.">st</a>.n_fwdflat_chan / (cf + 1));
<a name="l00946"></a>00946 E_INFO(<span class="stringliteral">"%8d words searched (%d/fr)\n"</span>,
<a name="l00947"></a>00947 ngs-><a class="code" href="structngram__search__s.html#a5758d167fbb48e824a6a58186620e06d" title="Various statistics for profiling.">st</a>.n_fwdflat_words, ngs-><a class="code" href="structngram__search__s.html#a5758d167fbb48e824a6a58186620e06d" title="Various statistics for profiling.">st</a>.n_fwdflat_words / (cf + 1));
<a name="l00948"></a>00948 E_INFO(<span class="stringliteral">"%8d word transitions (%d/fr)\n"</span>,
<a name="l00949"></a>00949 ngs-><a class="code" href="structngram__search__s.html#a5758d167fbb48e824a6a58186620e06d" title="Various statistics for profiling.">st</a>.n_fwdflat_word_transition,
<a name="l00950"></a>00950 ngs-><a class="code" href="structngram__search__s.html#a5758d167fbb48e824a6a58186620e06d" title="Various statistics for profiling.">st</a>.n_fwdflat_word_transition / (cf + 1));
<a name="l00951"></a>00951 E_INFO(<span class="stringliteral">"fwdflat %.2f CPU %.3f xRT\n"</span>,
<a name="l00952"></a>00952 ngs->fwdflat_perf.t_cpu,
<a name="l00953"></a>00953 ngs->fwdflat_perf.t_cpu / n_speech);
<a name="l00954"></a>00954 E_INFO(<span class="stringliteral">"fwdflat %.2f wall %.3f xRT\n"</span>,
<a name="l00955"></a>00955 ngs->fwdflat_perf.t_elapsed,
<a name="l00956"></a>00956 ngs->fwdflat_perf.t_elapsed / n_speech);
<a name="l00957"></a>00957 }
<a name="l00958"></a>00958 }
</pre></div></div>
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