198913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project/* Copyright (C) 2002 Jean-Marc Valin */ 298913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project/** 398913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project @file filters.h 498913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project @brief Various analysis/synthesis filters 598913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project*/ 698913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project/* 798913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project Redistribution and use in source and binary forms, with or without 898913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project modification, are permitted provided that the following conditions 998913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project are met: 1098913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project 1198913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project - Redistributions of source code must retain the above copyright 1298913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project notice, this list of conditions and the following disclaimer. 1398913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project 1498913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project - Redistributions in binary form must reproduce the above copyright 1598913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project notice, this list of conditions and the following disclaimer in the 1698913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project documentation and/or other materials provided with the distribution. 1798913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project 1898913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project - Neither the name of the Xiph.org Foundation nor the names of its 1998913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project contributors may be used to endorse or promote products derived from 2098913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project this software without specific prior written permission. 2198913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project 2298913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 2398913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 2498913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 2598913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR 2698913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 2798913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 2898913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 2998913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF 3098913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING 3198913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS 3298913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 3398913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project*/ 3498913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project 3598913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project#ifndef FILTERS_H 3698913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project#define FILTERS_H 3798913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project 3898913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project#include "arch.h" 3998913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project 4098913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Projectspx_word16_t compute_rms(const spx_sig_t *x, int len); 4198913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Projectspx_word16_t compute_rms16(const spx_word16_t *x, int len); 4298913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Projectvoid signal_mul(const spx_sig_t *x, spx_sig_t *y, spx_word32_t scale, int len); 4398913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Projectvoid signal_div(const spx_word16_t *x, spx_word16_t *y, spx_word32_t scale, int len); 4498913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project 4598913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project#ifdef FIXED_POINT 4698913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project 4798913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Projectint normalize16(const spx_sig_t *x, spx_word16_t *y, spx_sig_t max_scale, int len); 4898913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project 4998913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project#endif 5098913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project 5198913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project 5298913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project#define HIGHPASS_NARROWBAND 0 5398913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project#define HIGHPASS_WIDEBAND 2 5498913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project#define HIGHPASS_INPUT 0 5598913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project#define HIGHPASS_OUTPUT 1 5698913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project#define HIGHPASS_IRS 4 5798913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project 5898913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Projectvoid highpass(const spx_word16_t *x, spx_word16_t *y, int len, int filtID, spx_mem_t *mem); 5998913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project 6098913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project 6198913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Projectvoid 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); 6298913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Projectvoid 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); 6398913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project 6498913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Projectvoid 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); 6598913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Projectvoid 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); 6698913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Projectvoid 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); 6798913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project 6898913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project/* Apply bandwidth expansion on LPC coef */ 6998913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Projectvoid bw_lpc(spx_word16_t , const spx_coef_t *lpc_in, spx_coef_t *lpc_out, int order); 7098913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Projectvoid sanitize_values32(spx_word32_t *vec, spx_word32_t min_val, spx_word32_t max_val, int len); 7198913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project 7298913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project 7398913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Projectvoid 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); 7498913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Projectvoid 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); 7598913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project 7698913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Projectvoid 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); 7798913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project 7898913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Projectvoid multicomb( 7998913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Projectspx_word16_t *exc, /*decoded excitation*/ 8098913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Projectspx_word16_t *new_exc, /*enhanced excitation*/ 8198913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Projectspx_coef_t *ak, /*LPC filter coefs*/ 8298913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Projectint p, /*LPC order*/ 8398913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Projectint nsf, /*sub-frame size*/ 8498913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Projectint pitch, /*pitch period*/ 8598913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Projectint max_pitch, /*pitch gain (3-tap)*/ 8698913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Projectspx_word16_t comb_gain, /*gain of comb filter*/ 8798913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Projectchar *stack 8898913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project); 8998913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project 9098913fed6520d8849fb2e246be943e04474aefaThe Android Open Source Project#endif 91