1 files changed, 66 insertions, 0 deletions
diff --git a/media/sphinxbase/src/libsphinxbase/fe/fe_noise.h b/media/sphinxbase/src/libsphinxbase/fe/fe_noise.h
new file mode 100644
index 000000000..b633a4cec
--- /dev/null
+++ b/media/sphinxbase/src/libsphinxbase/fe/fe_noise.h
@@ -0,0 +1,66 @@
+/* -*- 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 work was supported in part by funding from the Defense Advanced 
+ * Research Projects Agency and the National Science Foundation of the 
+ * United States of America, and the CMU Sphinx Speech Consortium.
+ *
+ * THIS SOFTWARE IS PROVIDED BY CARNEGIE MELLON UNIVERSITY ``AS IS'' AND 
+ * ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY
+ * NOR ITS EMPLOYEES BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * ====================================================================
+ *
+ */
+#ifndef FE_NOISE_H
+#define FE_NOISE_H
+
+#include "sphinxbase/fe.h"
+#include "sphinxbase/fixpoint.h"
+#include "fe_type.h"
+
+typedef struct noise_stats_s noise_stats_t;
+
+/* Creates noisestats object */
+noise_stats_t *fe_init_noisestats(int num_filters);
+
+/* Resets collected noise statistics */
+void fe_reset_noisestats(noise_stats_t * noise_stats);
+
+/* Frees allocated data */
+void fe_free_noisestats(noise_stats_t * noise_stats);
+
+/**
+ * Process frame, update noise statistics, remove noise components if needed, 
+ * and return local vad decision.
+ */
+void fe_track_snr(fe_t *fe, int32 *in_speech);
+
+/**
+ * Updates global state based on local VAD state smoothing the estimate.
+ */
+void fe_vad_hangover(fe_t *fe, mfcc_t *fea, int32 is_speech);
+
+#endif                          /* FE_NOISE_H */