TeaSpeak-Client/native/codec/libraries/speex/tmv/lpc_tm.h
2019-06-26 22:09:01 +02:00

151 lines
3.7 KiB
C

/* Copyright (C) 2007 Hong Zhiqian */
/**
@file lpc_tm.h
@author Hong Zhiqian
@brief Various compatibility routines for Speex (TriMedia version)
*/
/*
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.
*/
#include <ops/custom_defs.h>
#include "profile_tm.h"
#ifdef FIXED_POINT
#define OVERRIDE_SPEEX_AUTOCORR
void _spx_autocorr(const Int16 *x, Int16 *ac, int lag, int n)
{
register int i, j;
register int shift, ac_shift;
register int n_2;
register int ac0;
TMDEBUG_ALIGNMEM(x);
TMDEBUG_ALIGNMEM(ac);
_SPX_AUTOCORR_START();
n_2 = n >> 1;
ac0 = n + 1;
#if (TM_UNROLL && TM_UNROLL__SPXAUTOCORR)
#pragma TCS_unroll=5
#pragma TCS_unrollexact=1
#endif
for ( j=0 ; j<n_2 ; j+=4 )
{ register int x10, x32, x54, x76;
x10 = ld32x(x,j);
x32 = ld32x(x,j+1);
x54 = ld32x(x,j+2);
x76 = ld32x(x,j+3);
ac0 += ifir16(x10, x10) >> 8;
ac0 += ifir16(x32, x32) >> 8;
ac0 += ifir16(x54, x54) >> 8;
ac0 += ifir16(x76, x76) >> 8;
}
#if (TM_UNROLL && TM_UNROLL__SPXAUTOCORR)
#pragma TCS_unrollexact=0
#pragma TCS_unroll=0
#endif
shift = 8;
while (shift && ac0<0x40000000)
{ shift--;
ac0 <<= 1;
}
ac_shift = 18;
while (ac_shift && ac0<0x40000000)
{ ac_shift--;
ac0 <<= 1;
}
if ( shift == 0 )
{
for ( i=0 ; i<lag ; ++i )
{
register int acc0, acc1, acc2;
register int k, l, m;
register int x10, x32, y10, y32;
acc2 = acc1 = acc0 = 0;
for ( j=i ; j<16 ; ++j )
{ acc0 += (x[j] * x[j-i]);
}
for ( k=16,l=8,m=16-i ; k<n ; k+=4,l+=2,m+=4 )
{
x10 = ld32x(x,l);
y10 = pack16lsb(x[m+1],x[m]);
x32 = ld32x(x,l+1);
y32 = pack16lsb(x[m+3],x[m+2]);
acc1 += ifir16(x10,y10);
acc2 += ifir16(x32,y32);
}
ac[i] = (acc0 + acc1 + acc2) >> ac_shift;
}
} else
{
for ( i=0 ; i<lag ; ++i )
{
register int acc0, acc1, acc2;
register int k, l, m;
register int x10, x32, y10, y32;
acc2 = acc1 = acc0 = 0;
for ( j=i ; j<16 ; ++j )
{ acc0 += (x[j] * x[j-i]) >> shift;
}
for ( k=16,l=8,m=16-i ; k<n ; k+=4,l+=2,m+=4 )
{
x10 = ld32x(x,l);
y10 = pack16lsb(x[m+1],x[m]);
x32 = ld32x(x,l+1);
y32 = pack16lsb(x[m+3],x[m+2]);
acc1 += ifir16(x10,y10) >> shift;
acc2 += ifir16(x32,y32) >> shift;
}
ac[i] = (acc0 + acc1 + acc2) >> ac_shift;
}
}
_SPX_AUTOCORR_STOP();
}
#endif