1 files changed, 66 insertions, 0 deletions
diff --git a/code/libspeex/filterbank.h b/code/libspeex/filterbank.h
new file mode 100644
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+++ b/code/libspeex/filterbank.h
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+/* Copyright (C) 2006 Jean-Marc Valin */
+/**
+   @file filterbank.h
+   @brief Converting between psd and filterbank
+ */
+/*
+   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.
+
+   3. The name of the author may not be used to endorse or promote products
+   derived from this software without specific prior written permission.
+
+   THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS 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 THE AUTHOR 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 FILTERBANK_H
+#define FILTERBANK_H
+
+#include "arch.h"
+
+typedef struct {
+   int *bank_left;
+   int *bank_right;
+   spx_word16_t *filter_left;
+   spx_word16_t *filter_right;
+#ifndef FIXED_POINT
+   float *scaling;
+#endif
+   int nb_banks;
+   int len;
+} FilterBank;
+
+
+FilterBank *filterbank_new(int banks, spx_word32_t sampling, int len, int type);
+
+void filterbank_destroy(FilterBank *bank);
+
+void filterbank_compute_bank32(FilterBank *bank, spx_word32_t *ps, spx_word32_t *mel);
+
+void filterbank_compute_psd16(FilterBank *bank, spx_word16_t *mel, spx_word16_t *psd);
+
+#ifndef FIXED_POINT
+void filterbank_compute_bank(FilterBank *bank, float *psd, float *mel);
+void filterbank_compute_psd(FilterBank *bank, float *mel, float *psd);
+#endif
+
+
+#endif