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67 lines
2.2 KiB
C
67 lines
2.2 KiB
C
10 years ago
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/* Copyright (C) 2006 Jean-Marc Valin */
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/**
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@file filterbank.h
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@brief Converting between psd and filterbank
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*/
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/*
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are
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met:
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1. Redistributions of source code must retain the above copyright notice,
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this list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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3. The name of the author may not be used to endorse or promote products
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derived from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
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INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef FILTERBANK_H
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#define FILTERBANK_H
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#include "arch.h"
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typedef struct {
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int *bank_left;
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int *bank_right;
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spx_word16_t *filter_left;
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spx_word16_t *filter_right;
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#ifndef FIXED_POINT
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float *scaling;
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#endif
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int nb_banks;
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int len;
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} FilterBank;
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FilterBank *filterbank_new(int banks, spx_word32_t sampling, int len, int type);
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void filterbank_destroy(FilterBank *bank);
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void filterbank_compute_bank32(FilterBank *bank, spx_word32_t *ps, spx_word32_t *mel);
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void filterbank_compute_psd16(FilterBank *bank, spx_word16_t *mel, spx_word16_t *psd);
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#ifndef FIXED_POINT
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void filterbank_compute_bank(FilterBank *bank, float *psd, float *mel);
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void filterbank_compute_psd(FilterBank *bank, float *mel, float *psd);
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#endif
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#endif
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