gsm0610_local.h
/*
* SpanDSP - a series of DSP components for telephony
*
* gsm0610_local.h - GSM 06.10 full 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.
*
* This code is based on the widely used GSM 06.10 code available from
* http://kbs.cs.tu-berlin.de/~jutta/toast.html
*/
#if !defined(_GSM0610_LOCAL_H_)
#define _GSM0610_LOCAL_H_
#define GSM0610_FRAME_LEN 160
#define GSM0610_MAGIC 0xD
#include "spandsp/private/gsm0610.h"
static __inline__ int16_t gsm_add(int16_t a, int16_t b)
{
#if defined(__GNUC__) && (defined(__i386__) || defined(__x86_64__))
__asm__ __volatile__(
" addw %2,%0;\n"
" jno 0f;\n"
" movw $0x7fff,%0;\n"
" adcw $0,%0;\n"
"0:"
: "=&r" (a)
: "0" (a), "ir" (b)
: "cc"
);
return a;
#else
int32_t sum;
sum = (int32_t) a + (int32_t) b;
return saturate(sum);
#endif
}
/*- End of function --------------------------------------------------------*/
static __inline__ int32_t gsm_l_add(int32_t a, int32_t b)
{
#if defined(__GNUC__) && (defined(__i386__) || defined(__x86_64__))
__asm__ __volatile__(
" addl %2,%0;\n"
" jno 0f;\n"
" movl $0x7fffffff,%0;\n"
" adcl $0,%0;\n"
"0:"
: "=&r" (a)
: "0" (a), "ir" (b)
: "cc"
);
return a;
#else
uint32_t A;
if (a < 0)
{
if (b >= 0)
return a + b;
/*endif*/
A = (uint32_t) -(a + 1) + (uint32_t) -(b + 1);
return (A >= INT32_MAX) ? INT32_MIN : -(int32_t) A - 2;
}
/*endif*/
if (b <= 0)
return a + b;
/*endif*/
A = (uint32_t) a + (uint32_t) b;
return (A > INT32_MAX) ? INT32_MAX : A;
#endif
}
/*- End of function --------------------------------------------------------*/
static __inline__ int16_t gsm_sub(int16_t a, int16_t b)
{
int32_t diff;
diff = (int32_t) a - (int32_t) b;
return saturate(diff);
}
/*- End of function --------------------------------------------------------*/
static __inline__ int16_t gsm_mult(int16_t a, int16_t b)
{
if (a == INT16_MIN && b == INT16_MIN)
return INT16_MAX;
/*endif*/
return (int16_t) (((int32_t) a * (int32_t) b) >> 15);
}
/*- End of function --------------------------------------------------------*/
static __inline__ int32_t gsm_l_mult(int16_t a, int16_t b)
{
assert (a != INT16_MIN || b != INT16_MIN);
return ((int32_t) a * (int32_t) b) << 1;
}
/*- End of function --------------------------------------------------------*/
static __inline__ int16_t gsm_mult_r(int16_t a, int16_t b)
{
int32_t prod;
if (b == INT16_MIN && a == INT16_MIN)
return INT16_MAX;
/*endif*/
prod = (int32_t) a * (int32_t) b + 16384;
prod >>= 15;
return (int16_t) (prod & 0xFFFF);
}
/*- End of function --------------------------------------------------------*/
static __inline__ int16_t gsm_abs(int16_t a)
{
return (a == INT16_MIN) ? INT16_MAX : (int16_t) abs(a);
}
/*- End of function --------------------------------------------------------*/
static __inline__ int16_t gsm_asr(int16_t a, int n)
{
if (n >= 16)
return (int16_t) (-(a < 0));
/*endif*/
if (n <= -16)
return 0;
/*endif*/
if (n < 0)
return (int16_t) (a << -n);
/*endif*/
return (int16_t) (a >> n);
}
/*- End of function --------------------------------------------------------*/
static __inline__ int16_t gsm_asl(int16_t a, int n)
{
if (n >= 16)
return 0;
/*endif*/
if (n <= -16)
return (int16_t) (-(a < 0));
/*endif*/
if (n < 0)
return gsm_asr(a, -n);
/*endif*/
return (int16_t) (a << n);
}
/*- End of function --------------------------------------------------------*/
extern void gsm0610_long_term_predictor(gsm0610_state_t *s,
int16_t d[40],
int16_t *dp, /* [-120..-1] d' IN */
int16_t e[40],
int16_t dpp[40],
int16_t *Nc,
int16_t *bc);
extern void gsm0610_lpc_analysis(gsm0610_state_t *s,
int16_t amp[160],
int16_t LARc[8]);
extern void gsm0610_preprocess(gsm0610_state_t *s,
const int16_t amp[],
int16_t so[]);
extern void gsm0610_short_term_analysis_filter(gsm0610_state_t *s,
int16_t LARc[8],
int16_t amp[160]);
extern void gsm0610_long_term_synthesis_filtering(gsm0610_state_t *s,
int16_t Ncr,
int16_t bcr,
int16_t erp[40],
int16_t *drp); /* [-120..-1] IN, [0..40] OUT */
extern void gsm0610_rpe_decoding(gsm0610_state_t *s,
int16_t xmaxcr,
int16_t Mcr,
int16_t *xMcr, /* [0..12], 3 bits IN */
int16_t erp[40]);
extern void gsm0610_rpe_encoding(gsm0610_state_t *s,
int16_t *e, /* [-5..-1][0..39][40..44] IN/OUT */
int16_t *xmaxc,
int16_t *Mc,
int16_t xMc[13]);
extern void gsm0610_short_term_synthesis_filter(gsm0610_state_t *s,
int16_t LARcr[8],
int16_t drp[40],
int16_t amp[160]);
extern int16_t gsm0610_norm(int32_t a);
#endif
/*- End of include ---------------------------------------------------------*/