mirror of
https://github.com/UberGames/ioef.git
synced 2024-12-11 05:11:29 +00:00
91 lines
4 KiB
C
91 lines
4 KiB
C
|
/* Copyright (C) 2002 Jean-Marc Valin */
|
||
|
|
/**
|
||
|
|
@file filters.h
|
||
|
|
@brief Various analysis/synthesis filters
|
||
|
|
*/
|
||
|
|
/*
|
||
|
|
Redistribution and use in source and binary forms, with or without
|
||
|
|
modification, are permitted provided that the following conditions
|
||
|
|
are met:
|
||
|
|
|
||
|
|
- Redistributions of source code must retain the above copyright
|
||
|
|
notice, this list of conditions and the following disclaimer.
|
||
|
|
|
||
|
|
- 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.
|
||
|
|
|
||
|
|
- Neither the name of the Xiph.org Foundation nor the names of its
|
||
|
|
contributors may be used to endorse or promote products derived from
|
||
|
|
this software without specific prior written permission.
|
||
|
|
|
||
|
|
THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
||
|
|
``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 FOUNDATION OR
|
||
|
|
CONTRIBUTORS 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 FILTERS_H
|
||
|
|
#define FILTERS_H
|
||
|
|
|
||
|
|
#include "arch.h"
|
||
|
|
|
||
|
|
spx_word16_t compute_rms(const spx_sig_t *x, int len);
|
||
|
|
spx_word16_t compute_rms16(const spx_word16_t *x, int len);
|
||
|
|
void signal_mul(const spx_sig_t *x, spx_sig_t *y, spx_word32_t scale, int len);
|
||
|
|
void signal_div(const spx_word16_t *x, spx_word16_t *y, spx_word32_t scale, int len);
|
||
|
|
|
||
|
|
#ifdef FIXED_POINT
|
||
|
|
|
||
|
|
int normalize16(const spx_sig_t *x, spx_word16_t *y, spx_sig_t max_scale, int len);
|
||
|
|
|
||
|
|
#endif
|
||
|
|
|
||
|
|
|
||
|
|
#define HIGHPASS_NARROWBAND 0
|
||
|
|
#define HIGHPASS_WIDEBAND 2
|
||
|
|
#define HIGHPASS_INPUT 0
|
||
|
|
#define HIGHPASS_OUTPUT 1
|
||
|
|
#define HIGHPASS_IRS 4
|
||
|
|
|
||
|
|
void highpass(const spx_word16_t *x, spx_word16_t *y, int len, int filtID, spx_mem_t *mem);
|
||
|
|
|
||
|
|
|
||
|
|
void qmf_decomp(const spx_word16_t *xx, const spx_word16_t *aa, spx_word16_t *, spx_word16_t *y2, int N, int M, spx_word16_t *mem, char *stack);
|
||
|
|
void qmf_synth(const spx_word16_t *x1, const spx_word16_t *x2, const spx_word16_t *a, spx_word16_t *y, int N, int M, spx_word16_t *mem1, spx_word16_t *mem2, char *stack);
|
||
|
|
|
||
|
|
void filter_mem16(const spx_word16_t *x, const spx_coef_t *num, const spx_coef_t *den, spx_word16_t *y, int N, int ord, spx_mem_t *mem, char *stack);
|
||
|
|
void iir_mem16(const spx_word16_t *x, const spx_coef_t *den, spx_word16_t *y, int N, int ord, spx_mem_t *mem, char *stack);
|
||
|
|
void fir_mem16(const spx_word16_t *x, const spx_coef_t *num, spx_word16_t *y, int N, int ord, spx_mem_t *mem, char *stack);
|
||
|
|
|
||
|
|
/* Apply bandwidth expansion on LPC coef */
|
||
|
|
void bw_lpc(spx_word16_t , const spx_coef_t *lpc_in, spx_coef_t *lpc_out, int order);
|
||
|
|
void sanitize_values32(spx_word32_t *vec, spx_word32_t min_val, spx_word32_t max_val, int len);
|
||
|
|
|
||
|
|
|
||
|
|
void syn_percep_zero16(const spx_word16_t *xx, const spx_coef_t *ak, const spx_coef_t *awk1, const spx_coef_t *awk2, spx_word16_t *y, int N, int ord, char *stack);
|
||
|
|
void residue_percep_zero16(const spx_word16_t *xx, const spx_coef_t *ak, const spx_coef_t *awk1, const spx_coef_t *awk2, spx_word16_t *y, int N, int ord, char *stack);
|
||
|
|
|
||
|
|
void compute_impulse_response(const spx_coef_t *ak, const spx_coef_t *awk1, const spx_coef_t *awk2, spx_word16_t *y, int N, int ord, char *stack);
|
||
|
|
|
||
|
|
void multicomb(
|
||
|
|
spx_word16_t *exc, /*decoded excitation*/
|
||
|
|
spx_word16_t *new_exc, /*enhanced excitation*/
|
||
|
|
spx_coef_t *ak, /*LPC filter coefs*/
|
||
|
|
int p, /*LPC order*/
|
||
|
|
int nsf, /*sub-frame size*/
|
||
|
|
int pitch, /*pitch period*/
|
||
|
|
int max_pitch, /*pitch gain (3-tap)*/
|
||
|
|
spx_word16_t comb_gain, /*gain of comb filter*/
|
||
|
|
char *stack
|
||
|
|
);
|
||
|
|
|
||
|
|
#endif
|