Commit 68fbabf4 authored by smorlat's avatar smorlat

add various dsp utilities from speex.

Work in progress in the equalizer.

git-svn-id: svn+ssh://svn.savannah.nongnu.org/linphone/trunk@526 3f6dc0c8-ddfe-455d-9043-3cd528dc4637
parent 09211993
......@@ -38,6 +38,8 @@ AC_DEFINE_UNQUOTED(MEDIASTREAMER_MINOR_VERSION,$MEDIASTREAMER_MINOR_VERSION, [mi
AC_DEFINE_UNQUOTED(MEDIASTREAMER_MICRO_VERSION,$MEDIASTREAMER_MICRO_VERSION, [micro version])
AC_DEFINE_UNQUOTED(MEDIASTREAMER_VERSION,"$MEDIASTREAMER_VERSION",[MEDIASTREAMER version number])
MS_PUBLIC_CFLAGS=
AC_SUBST([mkdir_p])
AC_MSG_CHECKING([warning make an error on compilation])
......@@ -155,6 +157,19 @@ if test "$mingw_found" = "yes" ; then
fi
dnl prefer fixed point computations
AC_ARG_ENABLE(fixed_point,
[ --enable-fixed-point Turn on ipv6 support],
[case "${enableval}" in
yes) fixed_point=true;;
no) fixed_point=false;;
*) AC_MSG_ERROR(bad value ${enableval} for --enable-fixed-point) ;;
esac],[fixed_point=no])
if test x$fixed_point = xtrue ; then
MS_PUBLIC_CFLAGS="$MS_PUBLIC_CFLAGS -DMS_FIXED_POINT"
fi
dnl initialize pkg-config so that we can use it within if else fi statements.
PKG_PROG_PKG_CONFIG()
......@@ -572,6 +587,10 @@ AC_SUBST(VENDOR)
RELEASE=1
AC_SUBST(RELEASE)
CFLAGS="$CFLAGS $MS_PUBLIC_CFLAGS"
CXXFLAGS="$CXXFLAGS $MS_PUBLIC_CFLAGS"
dnl: these ones gets exported in pkgconfig file.
AC_SUBST(MS_PUBLIC_CFLAGS)
AC_OUTPUT(
Makefile
......
......@@ -20,7 +20,8 @@ mediastreamer2_include_HEADERS= ice.h \
msvolume.h \
mstee.h \
rfc3984.h \
mswebcam.h
mswebcam.h \
dsptools.h
EXTRA_DIST=$(mediastreamer2_include_HEADERS)
/*
mediastreamer2 library - modular sound and video processing and streaming
Copyright (C) 2009 Simon MORLAT (simon.morlat@linphone.org)
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.
*/
/* This file contains useful DSP routines from the speex project.
*/
/* Copyright (C) 2002-2006 Jean-Marc Valin
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.
*/
#ifndef ms_dsptools_h
#define ms_dsptools_h
#include <mediastreamer2/mscommon.h>
#ifdef MS_FIXED_POINT
typedef short ms_word16_t;
typedef int ms_word32_t;
typedef int ms_mem_t;
typedef short ms_coef_t;
#define QCONST16(x,bits) ((spx_word16_t)(.5+(x)*(((spx_word32_t)1)<<(bits))))
#define QCONST32(x,bits) ((spx_word32_t)(.5+(x)*(((spx_word32_t)1)<<(bits))))
#define NEG16(x) (-(x))
#define NEG32(x) (-(x))
#define EXTRACT16(x) ((spx_word16_t)(x))
#define EXTEND32(x) ((spx_word32_t)(x))
#define SHR16(a,shift) ((a) >> (shift))
#define SHL16(a,shift) ((a) << (shift))
#define SHR32(a,shift) ((a) >> (shift))
#define SHL32(a,shift) ((a) << (shift))
#define PSHR16(a,shift) (SHR16((a)+((1<<((shift))>>1)),shift))
#define PSHR32(a,shift) (SHR32((a)+((EXTEND32(1)<<((shift))>>1)),shift))
#define VSHR32(a, shift) (((shift)>0) ? SHR32(a, shift) : SHL32(a, -(shift)))
#define SATURATE16(x,a) (((x)>(a) ? (a) : (x)<-(a) ? -(a) : (x)))
#define SATURATE32(x,a) (((x)>(a) ? (a) : (x)<-(a) ? -(a) : (x)))
#define SHR(a,shift) ((a) >> (shift))
#define SHL(a,shift) ((spx_word32_t)(a) << (shift))
#define PSHR(a,shift) (SHR((a)+((EXTEND32(1)<<((shift))>>1)),shift))
#define SATURATE(x,a) (((x)>(a) ? (a) : (x)<-(a) ? -(a) : (x)))
#define ADD16(a,b) ((spx_word16_t)((spx_word16_t)(a)+(spx_word16_t)(b)))
#define SUB16(a,b) ((spx_word16_t)(a)-(spx_word16_t)(b))
#define ADD32(a,b) ((spx_word32_t)(a)+(spx_word32_t)(b))
#define SUB32(a,b) ((spx_word32_t)(a)-(spx_word32_t)(b))
/* result fits in 16 bits */
#define MULT16_16_16(a,b) ((((spx_word16_t)(a))*((spx_word16_t)(b))))
/* (spx_word32_t)(spx_word16_t) gives TI compiler a hint that it's 16x16->32 multiply */
#define MULT16_16(a,b) (((spx_word32_t)(spx_word16_t)(a))*((spx_word32_t)(spx_word16_t)(b)))
#define MAC16_16(c,a,b) (ADD32((c),MULT16_16((a),(b))))
#define MULT16_32_Q12(a,b) ADD32(MULT16_16((a),SHR((b),12)), SHR(MULT16_16((a),((b)&0x00000fff)),12))
#define MULT16_32_Q13(a,b) ADD32(MULT16_16((a),SHR((b),13)), SHR(MULT16_16((a),((b)&0x00001fff)),13))
#define MULT16_32_Q14(a,b) ADD32(MULT16_16((a),SHR((b),14)), SHR(MULT16_16((a),((b)&0x00003fff)),14))
#define MULT16_32_Q11(a,b) ADD32(MULT16_16((a),SHR((b),11)), SHR(MULT16_16((a),((b)&0x000007ff)),11))
#define MAC16_32_Q11(c,a,b) ADD32(c,ADD32(MULT16_16((a),SHR((b),11)), SHR(MULT16_16((a),((b)&0x000007ff)),11)))
#define MULT16_32_P15(a,b) ADD32(MULT16_16((a),SHR((b),15)), PSHR(MULT16_16((a),((b)&0x00007fff)),15))
#define MULT16_32_Q15(a,b) ADD32(MULT16_16((a),SHR((b),15)), SHR(MULT16_16((a),((b)&0x00007fff)),15))
#define MAC16_32_Q15(c,a,b) ADD32(c,ADD32(MULT16_16((a),SHR((b),15)), SHR(MULT16_16((a),((b)&0x00007fff)),15)))
#define MAC16_16_Q11(c,a,b) (ADD32((c),SHR(MULT16_16((a),(b)),11)))
#define MAC16_16_Q13(c,a,b) (ADD32((c),SHR(MULT16_16((a),(b)),13)))
#define MAC16_16_P13(c,a,b) (ADD32((c),SHR(ADD32(4096,MULT16_16((a),(b))),13)))
#define MULT16_16_Q11_32(a,b) (SHR(MULT16_16((a),(b)),11))
#define MULT16_16_Q13(a,b) (SHR(MULT16_16((a),(b)),13))
#define MULT16_16_Q14(a,b) (SHR(MULT16_16((a),(b)),14))
#define MULT16_16_Q15(a,b) (SHR(MULT16_16((a),(b)),15))
#define MULT16_16_P13(a,b) (SHR(ADD32(4096,MULT16_16((a),(b))),13))
#define MULT16_16_P14(a,b) (SHR(ADD32(8192,MULT16_16((a),(b))),14))
#define MULT16_16_P15(a,b) (SHR(ADD32(16384,MULT16_16((a),(b))),15))
#define MUL_16_32_R15(a,bh,bl) ADD32(MULT16_16((a),(bh)), SHR(MULT16_16((a),(bl)),15))
#define DIV32_16(a,b) ((spx_word16_t)(((spx_word32_t)(a))/((spx_word16_t)(b))))
#define PDIV32_16(a,b) ((spx_word16_t)(((spx_word32_t)(a)+((spx_word16_t)(b)>>1))/((spx_word16_t)(b))))
#define DIV32(a,b) (((spx_word32_t)(a))/((spx_word32_t)(b)))
#define PDIV32(a,b) (((spx_word32_t)(a)+((spx_word16_t)(b)>>1))/((spx_word32_t)(b)))
#ifdef ARM5E_ASM
#error "Fix me"
#elif defined (ARM4_ASM)
#error "Fix me"
#elif defined (BFIN_ASM)
#undef PDIV32_16
static inline ms_word16_t PDIV32_16(ms_word32_t a, ms_word16_t b)
{
ms_word32_t res, bb;
bb = b;
a += b>>1;
__asm__ (
"P0 = 15;\n\t"
"R0 = %1;\n\t"
"R1 = %2;\n\t"
//"R0 = R0 + R1;\n\t"
"R0 <<= 1;\n\t"
"DIVS (R0, R1);\n\t"
"LOOP divide%= LC0 = P0;\n\t"
"LOOP_BEGIN divide%=;\n\t"
"DIVQ (R0, R1);\n\t"
"LOOP_END divide%=;\n\t"
"R0 = R0.L;\n\t"
"%0 = R0;\n\t"
: "=m" (res)
: "m" (a), "m" (bb)
: "P0", "R0", "R1", "cc");
return res;
}
#undef DIV32_16
static inline ms_word16_t DIV32_16(ms_word32_t a, ms_word16_t b)
{
ms_word32_t res, bb;
bb = b;
/* Make the roundinf consistent with the C version
(do we need to do that?)*/
if (a<0)
a += (b-1);
__asm__ (
"P0 = 15;\n\t"
"R0 = %1;\n\t"
"R1 = %2;\n\t"
"R0 <<= 1;\n\t"
"DIVS (R0, R1);\n\t"
"LOOP divide%= LC0 = P0;\n\t"
"LOOP_BEGIN divide%=;\n\t"
"DIVQ (R0, R1);\n\t"
"LOOP_END divide%=;\n\t"
"R0 = R0.L;\n\t"
"%0 = R0;\n\t"
: "=m" (res)
: "m" (a), "m" (bb)
: "P0", "R0", "R1", "cc");
return res;
}
#undef MAX16
static inline ms_word16_t MAX16(ms_word16_t a, ms_word16_t b)
{
ms_word32_t res;
__asm__ (
"%1 = %1.L (X);\n\t"
"%2 = %2.L (X);\n\t"
"%0 = MAX(%1,%2);"
: "=d" (res)
: "%d" (a), "d" (b)
);
return res;
}
#undef MULT16_32_Q15
static inline ms_word32_t MULT16_32_Q15(ms_word16_t a, ms_word32_t b)
{
ms_word32_t res;
__asm__
(
"A1 = %2.L*%1.L (M);\n\t"
"A1 = A1 >>> 15;\n\t"
"%0 = (A1 += %2.L*%1.H) ;\n\t"
: "=&W" (res), "=&d" (b)
: "d" (a), "1" (b)
: "A1"
);
return res;
}
#undef MAC16_32_Q15
static inline ms_word32_t MAC16_32_Q15(ms_word32_t c, ms_word16_t a, ms_word32_t b)
{
ms_word32_t res;
__asm__
(
"A1 = %2.L*%1.L (M);\n\t"
"A1 = A1 >>> 15;\n\t"
"%0 = (A1 += %2.L*%1.H);\n\t"
"%0 = %0 + %4;\n\t"
: "=&W" (res), "=&d" (b)
: "d" (a), "1" (b), "d" (c)
: "A1"
);
return res;
}
#undef MULT16_32_Q14
static inline ms_word32_t MULT16_32_Q14(ms_word16_t a, ms_word32_t b)
{
ms_word32_t res;
__asm__
(
"%2 <<= 1;\n\t"
"A1 = %1.L*%2.L (M);\n\t"
"A1 = A1 >>> 15;\n\t"
"%0 = (A1 += %1.L*%2.H);\n\t"
: "=W" (res), "=d" (a), "=d" (b)
: "1" (a), "2" (b)
: "A1"
);
return res;
}
#undef MAC16_32_Q14
static inline ms_word32_t MAC16_32_Q14(ms_word32_t c, ms_word16_t a, ms_word32_t b)
{
ms_word32_t res;
__asm__
(
"%1 <<= 1;\n\t"
"A1 = %2.L*%1.L (M);\n\t"
"A1 = A1 >>> 15;\n\t"
"%0 = (A1 += %2.L*%1.H);\n\t"
"%0 = %0 + %4;\n\t"
: "=&W" (res), "=&d" (b)
: "d" (a), "1" (b), "d" (c)
: "A1"
);
return res;
}
#endif
#else
typedef float ms_mem_t;
typedef float ms_coef_t;
typedef float ms_lsp_t;
typedef float ms_sig_t;
typedef float ms_word16_t;
typedef float ms_word32_t;
#define Q15ONE 1.0f
#define LPC_SCALING 1.f
#define SIG_SCALING 1.f
#define LSP_SCALING 1.f
#define GAMMA_SCALING 1.f
#define GAIN_SCALING 1.f
#define GAIN_SCALING_1 1.f
#define VERY_SMALL 1e-15f
#define VERY_LARGE32 1e15f
#define VERY_LARGE16 1e15f
#define Q15_ONE ((ms_word16_t)1.f)
#define QCONST16(x,bits) (x)
#define QCONST32(x,bits) (x)
#define NEG16(x) (-(x))
#define NEG32(x) (-(x))
#define EXTRACT16(x) (x)
#define EXTEND32(x) (x)
#define SHR16(a,shift) (a)
#define SHL16(a,shift) (a)
#define SHR32(a,shift) (a)
#define SHL32(a,shift) (a)
#define PSHR16(a,shift) (a)
#define PSHR32(a,shift) (a)
#define VSHR32(a,shift) (a)
#define SATURATE16(x,a) (x)
#define SATURATE32(x,a) (x)
#define PSHR(a,shift) (a)
#define SHR(a,shift) (a)
#define SHL(a,shift) (a)
#define SATURATE(x,a) (x)
#define ADD16(a,b) ((a)+(b))
#define SUB16(a,b) ((a)-(b))
#define ADD32(a,b) ((a)+(b))
#define SUB32(a,b) ((a)-(b))
#define MULT16_16_16(a,b) ((a)*(b))
#define MULT16_16(a,b) ((ms_word32_t)(a)*(ms_word32_t)(b))
#define MAC16_16(c,a,b) ((c)+(ms_word32_t)(a)*(ms_word32_t)(b))
#define MULT16_32_Q11(a,b) ((a)*(b))
#define MULT16_32_Q13(a,b) ((a)*(b))
#define MULT16_32_Q14(a,b) ((a)*(b))
#define MULT16_32_Q15(a,b) ((a)*(b))
#define MULT16_32_P15(a,b) ((a)*(b))
#define MAC16_32_Q11(c,a,b) ((c)+(a)*(b))
#define MAC16_32_Q15(c,a,b) ((c)+(a)*(b))
#define MAC16_16_Q11(c,a,b) ((c)+(a)*(b))
#define MAC16_16_Q13(c,a,b) ((c)+(a)*(b))
#define MAC16_16_P13(c,a,b) ((c)+(a)*(b))
#define MULT16_16_Q11_32(a,b) ((a)*(b))
#define MULT16_16_Q13(a,b) ((a)*(b))
#define MULT16_16_Q14(a,b) ((a)*(b))
#define MULT16_16_Q15(a,b) ((a)*(b))
#define MULT16_16_P15(a,b) ((a)*(b))
#define MULT16_16_P13(a,b) ((a)*(b))
#define MULT16_16_P14(a,b) ((a)*(b))
#define DIV32_16(a,b) (((ms_word32_t)(a))/(ms_word16_t)(b))
#define PDIV32_16(a,b) (((ms_word32_t)(a))/(ms_word16_t)(b))
#define DIV32(a,b) (((ms_word32_t)(a))/(ms_word32_t)(b))
#define PDIV32(a,b) (((ms_word32_t)(a))/(ms_word32_t)(b))
#endif
#ifdef __cplusplus
extern "C"{
#endif
/*abstraction layer over kiss fft, taken from speex as well*/
/** Compute tables for an FFT */
void *ms_fft_init(int size);
/** Destroy tables for an FFT */
void ms_fft_destroy(void *table);
/** Forward (real to half-complex) transform */
void ms_fft(void *table, ms_word16_t *in, ms_word16_t *out);
/** Backward (half-complex to real) transform */
void ms_ifft(void *table, ms_word16_t *in, ms_word16_t *out);
/** digital filtering api*/
void ms_fir_mem16(const ms_word16_t *x, const ms_coef_t *num, ms_word16_t *y, int N, int ord, ms_mem_t *mem);
#ifdef __cplusplus
}
#endif
#endif
......@@ -8,4 +8,4 @@ Description: A mediastreaming library for telephony applications
Requires: ortp
Version: @MEDIASTREAMER_VERSION@
Libs: -L@libdir@ -lmediastreamer
Cflags: -I@includedir@
Cflags: -I@includedir@ @MS_PUBLIC_CFLAGS@
......@@ -29,7 +29,13 @@ libmediastreamer_la_SOURCES= mscommon.c \
msvolume.c \
mswebcam.c \
mtu.c \
void.c
void.c \
dsptools.c \
kiss_fft.c \
_kiss_fft_guts.h \
kiss_fft.h \
kiss_fftr.c \
kiss_fftr.h
#dummy c++ file to force libtool to use c++ linking (because of msdscap-mingw.cc)
nodist_EXTRA_libmediastreamer_la_SOURCES = dummy.cxx
......
/*
Copyright (c) 2003-2004, Mark Borgerding
All rights reserved.
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 author nor the names of any 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 COPYRIGHT OWNER 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.
*/
#undef MIN
#undef MAX
#define MIN(a,b) ((a)<(b) ? (a):(b))
#define MAX(a,b) ((a)>(b) ? (a):(b))
/* kiss_fft.h
defines kiss_fft_scalar as either short or a float type
and defines
typedef struct { kiss_fft_scalar r; kiss_fft_scalar i; }kiss_fft_cpx; */
#include "kiss_fft.h"
//#include "math_approx.h"
#define MAXFACTORS 32
/* e.g. an fft of length 128 has 4 factors
as far as kissfft is concerned
4*4*4*2
*/
struct kiss_fft_state{
int nfft;
int inverse;
int factors[2*MAXFACTORS];
kiss_fft_cpx twiddles[1];
};
/*
Explanation of macros dealing with complex math:
C_MUL(m,a,b) : m = a*b
C_FIXDIV( c , div ) : if a fixed point impl., c /= div. noop otherwise
C_SUB( res, a,b) : res = a - b
C_SUBFROM( res , a) : res -= a
C_ADDTO( res , a) : res += a
* */
#ifdef MS_FIXED_POINT
# define FRACBITS 15
# define SAMPPROD spx_int32_t
#define SAMP_MAX 32767
#define SAMP_MIN -SAMP_MAX
#if defined(CHECK_OVERFLOW)
# define CHECK_OVERFLOW_OP(a,op,b) \
if ( (SAMPPROD)(a) op (SAMPPROD)(b) > SAMP_MAX || (SAMPPROD)(a) op (SAMPPROD)(b) < SAMP_MIN ) { \
fprintf(stderr,"WARNING:overflow @ " __FILE__ "(%d): (%d " #op" %d) = %ld\n",__LINE__,(a),(b),(SAMPPROD)(a) op (SAMPPROD)(b) ); }
#endif
# define smul(a,b) ( (SAMPPROD)(a)*(b) )
# define sround( x ) (kiss_fft_scalar)( ( (x) + (1<<(FRACBITS-1)) ) >> FRACBITS )
# define S_MUL(a,b) sround( smul(a,b) )
# define C_MUL(m,a,b) \
do{ (m).r = sround( smul((a).r,(b).r) - smul((a).i,(b).i) ); \
(m).i = sround( smul((a).r,(b).i) + smul((a).i,(b).r) ); }while(0)
# define C_MUL4(m,a,b) \
do{ (m).r = PSHR32( smul((a).r,(b).r) - smul((a).i,(b).i),17 ); \
(m).i = PSHR32( smul((a).r,(b).i) + smul((a).i,(b).r),17 ); }while(0)
# define DIVSCALAR(x,k) \
(x) = sround( smul( x, SAMP_MAX/k ) )
# define C_FIXDIV(c,div) \
do { DIVSCALAR( (c).r , div); \
DIVSCALAR( (c).i , div); }while (0)
# define C_MULBYSCALAR( c, s ) \
do{ (c).r = sround( smul( (c).r , s ) ) ;\
(c).i = sround( smul( (c).i , s ) ) ; }while(0)
#else /* not FIXED_POINT*/
# define S_MUL(a,b) ( (a)*(b) )
#define C_MUL(m,a,b) \
do{ (m).r = (a).r*(b).r - (a).i*(b).i;\
(m).i = (a).r*(b).i + (a).i*(b).r; }while(0)
#define C_MUL4(m,a,b) C_MUL(m,a,b)
# define C_FIXDIV(c,div) /* NOOP */
# define C_MULBYSCALAR( c, s ) \
do{ (c).r *= (s);\
(c).i *= (s); }while(0)
#endif
#ifndef CHECK_OVERFLOW_OP
# define CHECK_OVERFLOW_OP(a,op,b) /* noop */
#endif
#define C_ADD( res, a,b)\
do { \
CHECK_OVERFLOW_OP((a).r,+,(b).r)\
CHECK_OVERFLOW_OP((a).i,+,(b).i)\
(res).r=(a).r+(b).r; (res).i=(a).i+(b).i; \
}while(0)
#define C_SUB( res, a,b)\
do { \
CHECK_OVERFLOW_OP((a).r,-,(b).r)\
CHECK_OVERFLOW_OP((a).i,-,(b).i)\
(res).r=(a).r-(b).r; (res).i=(a).i-(b).i; \
}while(0)
#define C_ADDTO( res , a)\
do { \
CHECK_OVERFLOW_OP((res).r,+,(a).r)\
CHECK_OVERFLOW_OP((res).i,+,(a).i)\
(res).r += (a).r; (res).i += (a).i;\
}while(0)
#define C_SUBFROM( res , a)\
do {\
CHECK_OVERFLOW_OP((res).r,-,(a).r)\
CHECK_OVERFLOW_OP((res).i,-,(a).i)\
(res).r -= (a).r; (res).i -= (a).i; \
}while(0)
#ifdef MS_FIXED_POINT
# define KISS_FFT_COS(phase) floor(MIN(32767,MAX(-32767,.5+32768 * cos (phase))))
# define KISS_FFT_SIN(phase) floor(MIN(32767,MAX(-32767,.5+32768 * sin (phase))))
# define HALF_OF(x) ((x)>>1)
#elif defined(USE_SIMD)
# define KISS_FFT_COS(phase) _mm_set1_ps( cos(phase) )
# define KISS_FFT_SIN(phase) _mm_set1_ps( sin(phase) )
# define HALF_OF(x) ((x)*_mm_set1_ps(.5))
#else
# define KISS_FFT_COS(phase) (kiss_fft_scalar) cos(phase)
# define KISS_FFT_SIN(phase) (kiss_fft_scalar) sin(phase)
# define HALF_OF(x) ((x)*.5)
#endif
#define kf_cexp(x,phase) \
do{ \
(x)->r = KISS_FFT_COS(phase);\
(x)->i = KISS_FFT_SIN(phase);\
}while(0)
#ifdef MS_FIXED_POINT
#define L1 32767
#define L2 -7651
#define L3 8277
#define L4 -626