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DuerOS-Light-SDK-v1.1.0/duer-os-light/external/speex/libspeex/filterbank.h@47:9e361da97763, 2017-07-18 (annotated)

Committer:
TMBOY
Date:
Tue Jul 18 16:54:45 2017 +0800
Revision:
47:9e361da97763
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Who changed what in which revision?

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TMBOY 47:9e361da97763 1 /* Copyright (C) 2006 Jean-Marc Valin */
TMBOY 47:9e361da97763 2 /**
TMBOY 47:9e361da97763 3 @file filterbank.h
TMBOY 47:9e361da97763 4 @brief Converting between psd and filterbank
TMBOY 47:9e361da97763 5 */
TMBOY 47:9e361da97763 6 /*
TMBOY 47:9e361da97763 7 Redistribution and use in source and binary forms, with or without
TMBOY 47:9e361da97763 8 modification, are permitted provided that the following conditions are
TMBOY 47:9e361da97763 9 met:
TMBOY 47:9e361da97763 10
TMBOY 47:9e361da97763 11 1. Redistributions of source code must retain the above copyright notice,
TMBOY 47:9e361da97763 12 this list of conditions and the following disclaimer.
TMBOY 47:9e361da97763 13
TMBOY 47:9e361da97763 14 2. Redistributions in binary form must reproduce the above copyright
TMBOY 47:9e361da97763 15 notice, this list of conditions and the following disclaimer in the
TMBOY 47:9e361da97763 16 documentation and/or other materials provided with the distribution.
TMBOY 47:9e361da97763 17
TMBOY 47:9e361da97763 18 3. The name of the author may not be used to endorse or promote products
TMBOY 47:9e361da97763 19 derived from this software without specific prior written permission.
TMBOY 47:9e361da97763 20
TMBOY 47:9e361da97763 21 THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
TMBOY 47:9e361da97763 22 IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
TMBOY 47:9e361da97763 23 OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
TMBOY 47:9e361da97763 24 DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
TMBOY 47:9e361da97763 25 INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
TMBOY 47:9e361da97763 26 (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
TMBOY 47:9e361da97763 27 SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
TMBOY 47:9e361da97763 28 HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
TMBOY 47:9e361da97763 29 STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
TMBOY 47:9e361da97763 30 ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
TMBOY 47:9e361da97763 31 POSSIBILITY OF SUCH DAMAGE.
TMBOY 47:9e361da97763 32 */
TMBOY 47:9e361da97763 33
TMBOY 47:9e361da97763 34 #ifndef FILTERBANK_H
TMBOY 47:9e361da97763 35 #define FILTERBANK_H
TMBOY 47:9e361da97763 36
TMBOY 47:9e361da97763 37 #include "misc.h"
TMBOY 47:9e361da97763 38
TMBOY 47:9e361da97763 39 typedef struct {
TMBOY 47:9e361da97763 40 int *bank_left;
TMBOY 47:9e361da97763 41 int *bank_right;
TMBOY 47:9e361da97763 42 spx_word16_t *filter_left;
TMBOY 47:9e361da97763 43 spx_word16_t *filter_right;
TMBOY 47:9e361da97763 44 #ifndef FIXED_POINT
TMBOY 47:9e361da97763 45 float *scaling;
TMBOY 47:9e361da97763 46 #endif
TMBOY 47:9e361da97763 47 int nb_banks;
TMBOY 47:9e361da97763 48 int len;
TMBOY 47:9e361da97763 49 } FilterBank;
TMBOY 47:9e361da97763 50
TMBOY 47:9e361da97763 51
TMBOY 47:9e361da97763 52 FilterBank *filterbank_new(int banks, spx_word32_t sampling, int len, int type);
TMBOY 47:9e361da97763 53
TMBOY 47:9e361da97763 54 void filterbank_destroy(FilterBank *bank);
TMBOY 47:9e361da97763 55
TMBOY 47:9e361da97763 56 void filterbank_compute_bank32(FilterBank *bank, spx_word32_t *ps, spx_word32_t *mel);
TMBOY 47:9e361da97763 57
TMBOY 47:9e361da97763 58 void filterbank_compute_psd16(FilterBank *bank, spx_word16_t *mel, spx_word16_t *psd);
TMBOY 47:9e361da97763 59
TMBOY 47:9e361da97763 60 #ifndef FIXED_POINT
TMBOY 47:9e361da97763 61 void filterbank_compute_bank(FilterBank *bank, float *psd, float *mel);
TMBOY 47:9e361da97763 62 void filterbank_compute_psd(FilterBank *bank, float *mel, float *psd);
TMBOY 47:9e361da97763 63 #endif
TMBOY 47:9e361da97763 64
TMBOY 47:9e361da97763 65
TMBOY 47:9e361da97763 66 #endif