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+/* -*- c-basic-offset: 4; indent-tabs-mode: nil -*- */
+/* ====================================================================
+ * Copyright (c) 2008 Carnegie Mellon University. All rights
+ * reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ *
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ *
+ * This work was supported in part by funding from the Defense Advanced
+ * Research Projects Agency and the National Science Foundation of the
+ * United States of America, and the CMU Sphinx Speech Consortium.
+ *
+ * THIS SOFTWARE IS PROVIDED BY CARNEGIE MELLON UNIVERSITY ``AS IS'' AND
+ * ANY EXPRESSED OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
+ * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL CARNEGIE MELLON UNIVERSITY
+ * NOR ITS EMPLOYEES BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * ====================================================================
+ *
+ */
+
+/**
+ * @file ps_mllr.h Model-space linear transforms for speaker adaptation
+ */
+
+#ifndef __PS_MLLR_H__
+#define __PS_MLLR_H__
+
+/* SphinxBase headers. */
+#include <sphinxbase/prim_type.h>
+#include <sphinxbase/ngram_model.h>
+
+/* PocketSphinx headers. */
+#include <pocketsphinx_export.h>
+
+/**
+ * Feature space linear transform object.
+ */
+typedef struct ps_mllr_s ps_mllr_t;
+
+/**
+ * Read a speaker-adaptive linear transform from a file.
+ */
+POCKETSPHINX_EXPORT
+ps_mllr_t *ps_mllr_read(char const *file);
+
+/**
+ * Retain a pointer to a linear transform.
+ */
+POCKETSPHINX_EXPORT
+ps_mllr_t *ps_mllr_retain(ps_mllr_t *mllr);
+
+/**
+ * Release a pointer to a linear transform.
+ */
+POCKETSPHINX_EXPORT
+int ps_mllr_free(ps_mllr_t *mllr);
+
+#endif /* __PS_MLLR_H__ */