summaryrefslogtreecommitdiffstats
path: root/media/pocketsphinx/src/kws_search.h
diff options
context:
space:
mode:
authorMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
committerMatt A. Tobin <mattatobin@localhost.localdomain>2018-02-02 04:16:08 -0500
commit5f8de423f190bbb79a62f804151bc24824fa32d8 (patch)
tree10027f336435511475e392454359edea8e25895d /media/pocketsphinx/src/kws_search.h
parent49ee0794b5d912db1f95dce6eb52d781dc210db5 (diff)
downloadUXP-5f8de423f190bbb79a62f804151bc24824fa32d8.tar
UXP-5f8de423f190bbb79a62f804151bc24824fa32d8.tar.gz
UXP-5f8de423f190bbb79a62f804151bc24824fa32d8.tar.lz
UXP-5f8de423f190bbb79a62f804151bc24824fa32d8.tar.xz
UXP-5f8de423f190bbb79a62f804151bc24824fa32d8.zip
Add m-esr52 at 52.6.0
Diffstat (limited to 'media/pocketsphinx/src/kws_search.h')
-rw-r--r--media/pocketsphinx/src/kws_search.h136
1 files changed, 136 insertions, 0 deletions
diff --git a/media/pocketsphinx/src/kws_search.h b/media/pocketsphinx/src/kws_search.h
new file mode 100644
index 000000000..d8cb7c85e
--- /dev/null
+++ b/media/pocketsphinx/src/kws_search.h
@@ -0,0 +1,136 @@
+/* -*- c-basic-offset: 4; indent-tabs-mode: nil -*- */
+/* ====================================================================
+ * Copyright (c) 2013 Carnegie Mellon University. All rights
+ * reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ *
+ *
+ * THIS SOFTWARE IS PROVIDED BY CARNEGIE MELLON UNIVERSITY ``AS IS'' AND
+ * ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY
+ * NOR ITS EMPLOYEES BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * ====================================================================
+ *
+ */
+
+/*
+ * kws_search.h -- Search structures for keyword spotting.
+ */
+
+#ifndef __KWS_SEARCH_H__
+#define __KWS_SEARCH_H__
+
+/* SphinxBase headers. */
+#include <sphinxbase/glist.h>
+#include <sphinxbase/cmd_ln.h>
+
+/* Local headers. */
+#include "pocketsphinx_internal.h"
+#include "kws_detections.h"
+#include "hmm.h"
+
+/**
+ * Segmentation "iterator" for KWS history.
+ */
+typedef struct kws_seg_s {
+ ps_seg_t base; /**< Base structure. */
+ gnode_t *detection; /**< Keyword detection correspondent to segment. */
+} kws_seg_t;
+
+typedef struct kws_keyword_s {
+ char* word;
+ int32 threshold;
+ hmm_t* hmms;
+ int32 n_hmms;
+} kws_keyword_t;
+
+/**
+ * Implementation of KWS search structure.
+ */
+typedef struct kws_search_s {
+ ps_search_t base;
+
+ hmm_context_t *hmmctx; /**< HMM context. */
+
+ kws_detections_t *detections; /**< Keyword spotting history */
+ kws_keyword_t* keyphrases; /**< Keyphrases to spot */
+ int n_keyphrases; /**< Keyphrases amount */
+ frame_idx_t frame; /**< Frame index */
+
+ int32 beam;
+
+ int32 plp; /**< Phone loop probability */
+ int32 bestscore; /**< For beam pruning */
+ int32 def_threshold; /**< default threshold for p(hyp)/p(altern) ratio */
+
+ int32 n_pl; /**< Number of CI phones */
+ hmm_t *pl_hmms; /**< Phone loop hmms - hmms of CI phones */
+
+} kws_search_t;
+
+/**
+ * Create, initialize and return a search module. Gets keywords either
+ * from keyphrase or from a keyphrase file.
+ */
+ps_search_t *kws_search_init(const char *keyphrase,
+ const char *keyfile,
+ cmd_ln_t * config,
+ acmod_t * acmod,
+ dict_t * dict, dict2pid_t * d2p);
+
+/**
+ * Deallocate search structure.
+ */
+void kws_search_free(ps_search_t * search);
+
+/**
+ * Update KWS search module for new key phrase.
+ */
+int kws_search_reinit(ps_search_t * kwss, dict_t * dict, dict2pid_t * d2p);
+
+/**
+ * Prepare the KWS search structure for beginning decoding of the next
+ * utterance.
+ */
+int kws_search_start(ps_search_t * search);
+
+/**
+ * Step one frame forward through the Viterbi search.
+ */
+int kws_search_step(ps_search_t * search, int frame_idx);
+
+/**
+ * Windup and clean the KWS search structure after utterance.
+ */
+int kws_search_finish(ps_search_t * search);
+
+/**
+ * Get hypothesis string from the KWS search.
+ */
+char const *kws_search_hyp(ps_search_t * search, int32 * out_score,
+ int32 * out_is_final);
+/**
+ * Get active keyphrases
+ */
+char* kws_search_get_keywords(ps_search_t * search);
+
+#endif /* __KWS_SEARCH_H__ */