lpc10_encdecs.h
/*
* SpanDSP - a series of DSP components for telephony
*
* lpc10_encdecs.h - LPC10 low bit rate speech codec.
*
* Written by Steve Underwood <steveu@coppice.org>
*
* Copyright (C) 2006 Steve Underwood
*
* All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU Lesser General Public License version 2.1,
* as published by the Free Software Foundation.
*
* 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#define LPC10_ORDER 10
#if !defined(min)
#define min(a,b) ((a) <= (b) ? (a) : (b))
#endif
#if !defined(max)
#define max(a,b) ((a) >= (b) ? (a) : (b))
#endif
void lpc10_placea(int32_t *ipitch,
int32_t voibuf[4][2],
int32_t *obound,
int32_t af,
int32_t vwin[3][2],
int32_t awin[3][2],
int32_t ewin[3][2],
int32_t lframe,
int32_t maxwin);
void lpc10_placev(int32_t *osbuf,
int32_t *osptr,
int32_t oslen,
int32_t *obound,
int32_t vwin[3][2],
int32_t af,
int32_t lframe,
int32_t minwin,
int32_t maxwin,
int32_t dvwinl,
int32_t dvwinh);
void lpc10_voicing(lpc10_encode_state_t *st,
int32_t *vwin,
float *inbuf,
float *lpbuf,
const int32_t buflim[],
int32_t half,
float *minamd,
float *maxamd,
int32_t *mintau,
float *ivrc,
int32_t *obound);
void lpc10_analyse(lpc10_encode_state_t *st, float *speech, int32_t *voice, int32_t *pitch, float *rms, float rc[]);
static __inline__ int32_t pow_ii(int32_t x, int32_t n)
{
int32_t pow;
uint32_t u;
if (n <= 0)
{
if (n == 0 || x == 1)
return 1;
if (x != -1)
return (x == 0) ? 1/x : 0;
n = -n;
}
u = n;
for (pow = 1; ; )
{
if ((u & 1))
pow *= x;
if ((u >>= 1) == 0)
break;
x *= x;
}
return pow;
}
/*- End of function --------------------------------------------------------*/
static __inline__ float r_sign(float a, float b)
{
float x;
x = fabsf(a);
return (b >= 0.0f) ? x : -x;
}
/*- End of function --------------------------------------------------------*/
/*- End of file ------------------------------------------------------------*/