mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-11-08 18:39:54 +00:00
ad68f71d9a
This fixes thread-safety issues and various other minor issues. Our previous version was about 13 years old. Fixes https://gitlab.freedesktop.org/gstreamer/gst-plugins-base/issues/715
173 lines
5.1 KiB
C
173 lines
5.1 KiB
C
/*
|
|
* Copyright (c) 2003-2010, Mark Borgerding. All rights reserved.
|
|
* This file is part of KISS FFT - https://github.com/mborgerding/kissfft
|
|
*
|
|
* SPDX-License-Identifier: BSD-3-Clause
|
|
* See COPYING file for more information.
|
|
*/
|
|
|
|
/* kiss_fft_f64.h
|
|
defines kiss_fft_f64_scalar as either short or a float type
|
|
and defines
|
|
typedef struct { kiss_fft_f64_scalar r; kiss_fft_f64_scalar i; }kiss_fft_f64_cpx; */
|
|
#include "kiss_fft_f64.h"
|
|
#include <limits.h>
|
|
|
|
/* The 2*sizeof(size_t) alignment here is borrowed from
|
|
* GNU libc, so it should be good most everywhere.
|
|
* It is more conservative than is needed on some 64-bit
|
|
* platforms, but ia64 does require a 16-byte alignment.
|
|
* The SIMD extensions for x86 and ppc32 would want a
|
|
* larger alignment than this, but we don't need to
|
|
* do better than malloc.
|
|
*
|
|
* Borrowed from GLib's gobject/gtype.c
|
|
*/
|
|
#define STRUCT_ALIGNMENT (2 * sizeof (size_t))
|
|
#define ALIGN_STRUCT(offset) \
|
|
((offset + (STRUCT_ALIGNMENT - 1)) & -STRUCT_ALIGNMENT)
|
|
|
|
#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_f64_state{
|
|
int nfft;
|
|
int inverse;
|
|
int factors[2*MAXFACTORS];
|
|
kiss_fft_f64_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 FIXED_POINT
|
|
#include <stdint.h>
|
|
#if (FIXED_POINT==32)
|
|
# define FRACBITS 31
|
|
# define SAMPPROD int64_t
|
|
#define SAMP_MAX INT32_MAX
|
|
#define SAMP_MIN INT32_MIN
|
|
#else
|
|
# define FRACBITS 15
|
|
# define SAMPPROD int32_t
|
|
#define SAMP_MAX INT16_MAX
|
|
#define SAMP_MIN INT16_MIN
|
|
#endif
|
|
|
|
#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 ) { \
|
|
g_critical("overflow @ " __FILE__ "(%d): (%d " #op" %d) = %ld",__LINE__,(a),(b),(SAMPPROD)(a) op (SAMPPROD)(b) ); }
|
|
#endif
|
|
|
|
|
|
# define smul(a,b) ( (SAMPPROD)(a)*(b) )
|
|
# define sround( x ) (kiss_fft_f64_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 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_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 FIXED_POINT
|
|
# define KISS_FFT_F64_COS(phase) floor(.5+SAMP_MAX * cos (phase))
|
|
# define KISS_FFT_F64_SIN(phase) floor(.5+SAMP_MAX * sin (phase))
|
|
# define HALF_OF(x) ((x)>>1)
|
|
#elif defined(USE_SIMD)
|
|
# define KISS_FFT_F64_COS(phase) _mm_set1_ps( cos(phase) )
|
|
# define KISS_FFT_F64_SIN(phase) _mm_set1_ps( sin(phase) )
|
|
# define HALF_OF(x) ((x)*_mm_set1_ps(.5))
|
|
#else
|
|
# define KISS_FFT_F64_COS(phase) (kiss_fft_f64_scalar) cos(phase)
|
|
# define KISS_FFT_F64_SIN(phase) (kiss_fft_f64_scalar) sin(phase)
|
|
# define HALF_OF(x) ((x)*.5)
|
|
#endif
|
|
|
|
#define kf_cexp(x,phase) \
|
|
do{ \
|
|
(x)->r = KISS_FFT_F64_COS(phase);\
|
|
(x)->i = KISS_FFT_F64_SIN(phase);\
|
|
}while(0)
|
|
|
|
|
|
/* a debugging function */
|
|
#define pcpx(c)\
|
|
fprintf(stderr,"%g + %gi\n",(double)((c)->r),(double)((c)->i) )
|
|
|
|
|
|
#ifdef KISS_FFT_F64_USE_ALLOCA
|
|
// define this to allow use of alloca instead of malloc for temporary buffers
|
|
// Temporary buffers are used in two case:
|
|
// 1. FFT sizes that have "bad" factors. i.e. not 2,3 and 5
|
|
// 2. "in-place" FFTs. Notice the quotes, since kissfft does not really do an in-place transform.
|
|
#include <alloca.h>
|
|
#define KISS_FFT_F64_TMP_ALLOC(nbytes) alloca(nbytes)
|
|
#define KISS_FFT_F64_TMP_FREE(ptr)
|
|
#else
|
|
#define KISS_FFT_F64_TMP_ALLOC(nbytes) KISS_FFT_F64_MALLOC(nbytes)
|
|
#define KISS_FFT_F64_TMP_FREE(ptr) KISS_FFT_F64_FREE(ptr)
|
|
#endif
|