diff options
Diffstat (limited to 'gst-libs/gst/fft/_kiss_fft_guts_f64.h')
| -rw-r--r-- | gst-libs/gst/fft/_kiss_fft_guts_f64.h | 99 |
1 files changed, 80 insertions, 19 deletions
diff --git a/gst-libs/gst/fft/_kiss_fft_guts_f64.h b/gst-libs/gst/fft/_kiss_fft_guts_f64.h index 4202716d8..f1b00fb9f 100644 --- a/gst-libs/gst/fft/_kiss_fft_guts_f64.h +++ b/gst-libs/gst/fft/_kiss_fft_guts_f64.h @@ -1,18 +1,12 @@ /* -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. -*/ + * 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.h +/* 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; */ @@ -55,15 +49,58 @@ struct kiss_fft_f64_state{ 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) ( (a)*(b) ) +# 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 ) \ +# 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 */ @@ -96,9 +133,19 @@ struct kiss_fft_f64_state{ }while(0) -#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) +#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{ \ @@ -110,3 +157,17 @@ struct kiss_fft_f64_state{ /* 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 |