ref: 67b4f27683c75a5249eb4b25c025779dc389f2a1
dir: /libfaac/filtbank.h/
/*
* FAAC - Freeware Advanced Audio Coder
* Copyright (C) 2001 Menno Bakker
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* $Id: filtbank.h,v 1.4 2001/02/25 18:41:16 menno Exp $
*/
#ifndef FILTBANK_H
#define FILTBANK_H
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
#include "frame.h"
#define NFLAT_LS 448
#ifndef M_PI
#define M_PI 3.14159265358979323846
#endif
#ifndef M_PI_2
#define M_PI_2 1.57079632679489661923
#endif
#define SINE_WINDOW 0
#define KBD_WINDOW 1
void FilterBankInit(faacEncHandle hEncoder);
void FilterBankEnd(faacEncHandle hEncoder);
void FilterBank(faacEncHandle hEncoder,
CoderInfo *coderInfo,
double *p_in_data,
double *p_out_mdct,
double *p_overlap);
void specFilter(double *freqBuff,
int sampleRate,
int lowpassFreq,
int specLen
);
static void CalculateKBDWindow(double* win, double alpha, int length);
static double Izero(double x);
static void MDCT(double *data, int N);
static void IMDCT(double *data, int N);
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* FILTBANK_H */