im_fwfft() is a class
This commit is contained in:
John Cupitt
parent
1f51409bf1
commit
451eff58b1
@ -32,6 +32,7 @@
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- vipsthumbnail has a --crop option
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- remove video4linux1 code, it was useless on all modern linuxes
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- redone freq filter builders as classes
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- redone im_fwfft() as a class
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20/11/13 started 7.36.5
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- better cache sizing in unbuffered sequential mode
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@ -1,6 +1,9 @@
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noinst_LTLIBRARIES = libfreq_filt.la
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libfreq_filt_la_SOURCES = \
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freqfilt.c \
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pfreqfilt.h \
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fwfft.c \
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im_phasecor_fft.c \
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freq_dispatch.c \
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im_disp_ps.c \
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@ -42,17 +42,6 @@
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#include <vips/vips.h>
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/**
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* SECTION: freq_filt
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* @short_description: fourier transforms and frequency-domin filters
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* @stability: Stable
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* @see_also: <link linkend="libvips-image">image</link>
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* @include: vips/vips.h
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*
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* To and from Fourier space, filter in Fourier space, convert Fourier-space
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* images to a displayable form.
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*/
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/* One image in, one out.
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*/
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static im_arg_desc one_in_one_out[] = {
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166
libvips/freq_filt/freqfilt.c
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166
libvips/freq_filt/freqfilt.c
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@ -0,0 +1,166 @@
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/* base class for all Fourier stuff
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*
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* properties:
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* - single output image
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*/
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/*
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Copyright (C) 1991-2005 The National Gallery
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This library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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This library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with this library; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA
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*/
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/*
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These files are distributed with VIPS - http://www.vips.ecs.soton.ac.uk
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*/
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/*
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#define DEBUG
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*/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif /*HAVE_CONFIG_H*/
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#include <vips/intl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <math.h>
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#include <vips/vips.h>
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#include <vips/internal.h>
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#include "pfreqfilt.h"
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/**
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* SECTION: freq_filt
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* @short_description: fourier transforms and frequency-domin filters
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* @stability: Stable
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* @see_also: <link linkend="libvips-image">image</link>
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* @include: vips/vips.h
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*
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* To and from Fourier space, filter in Fourier space, convert Fourier-space
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* images to a displayable form.
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*/
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G_DEFINE_ABSTRACT_TYPE( VipsFreqfilt, vips_freqfilt, VIPS_TYPE_OPERATION );
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static int
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vips_freqfilt_build( VipsObject *object )
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{
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VipsFreqfilt *freqfilt = VIPS_FREQFILT( object );
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#ifdef DEBUG
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printf( "vips_freqfilt_build: " );
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vips_object_print_name( object );
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printf( "\n" );
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#endif /*DEBUG*/
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g_object_set( freqfilt, "out", vips_image_new(), NULL );
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if( VIPS_OBJECT_CLASS( vips_freqfilt_parent_class )->build( object ) )
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return( -1 );
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return( 0 );
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}
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static void
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vips_freqfilt_class_init( VipsFreqfiltClass *class )
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{
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GObjectClass *gobject_class = G_OBJECT_CLASS( class );
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VipsObjectClass *vobject_class = VIPS_OBJECT_CLASS( class );
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gobject_class->set_property = vips_object_set_property;
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gobject_class->get_property = vips_object_get_property;
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vobject_class->nickname = "freqfilt";
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vobject_class->description = _( "frequency-domain filter operations" );
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vobject_class->build = vips_freqfilt_build;
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VIPS_ARG_IMAGE( class, "out", 1,
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_( "Output" ),
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_( "Output image" ),
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VIPS_ARGUMENT_REQUIRED_OUTPUT,
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G_STRUCT_OFFSET( VipsFreqfilt, out ) );
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}
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static void
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vips_freqfilt_init( VipsFreqfilt *freqfilt )
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{
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}
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/* Transform an n-band image with a 1-band processing function.
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*
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* Memory strategy: we need memory buffers for the input and the output of
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* fftw. In some modes fftw generates only half the output and we construct
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* the rest.
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*
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* input pipeline ->
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* bandsplit ->
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* full memory image, freed when im_*fft*() exits ->
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* fftw ->
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* half memory image, freed when im_*fft*() exits ->
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* full memory image, freed when @out is freed ->
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* partial bandjoin ->
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* output pipeline
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*
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* im__fftproc() needs to just call im__fftproc_fn directly for 1 band images,
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* so we can't cache the output in this fn.
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*/
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int
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vips__fftproc( VipsObject *context,
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VipsImage *in, VipsImage **out, VipsFftProcessFn fn )
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{
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VipsImage **bands = (VipsImage **)
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vips_object_local_array( context, in->Bands );
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VipsImage **fft = (VipsImage **)
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vips_object_local_array( context, in->Bands );
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int b;
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if( in->Bands == 1 )
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return( fn( context, in, out ) );
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for( b = 0; b < in->Bands; b++ )
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if( vips_extract_band( in, &bands[b], b, NULL ) ||
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fn( context, bands[b], &fft[b] ) )
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return( -1 );
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if( vips_bandjoin( fft, out, in->Bands, NULL ) )
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return( -1 );
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return( 0 );
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}
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/* Called from iofuncs to init all operations in this dir. Use a plugin system
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* instead?
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*/
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void
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vips_freqfilt_operation_init( void )
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{
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#ifdef HAVE_FFTW
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extern GType vips_fwfft_get_type( void );
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#endif /*HAVE_FFTW*/
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#ifdef HAVE_FFTW
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vips_fwfft_get_type();
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#endif /*HAVE_FFTW*/
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}
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375
libvips/freq_filt/fwfft.c
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375
libvips/freq_filt/fwfft.c
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@ -0,0 +1,375 @@
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/* forward FFT
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*
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* Author: Nicos Dessipris
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* Written on: 12/04/1990
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* Modified on : 09/05/1990 to cope with float input
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* Modified on : 08/03/1991 history removed
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* Modified on : 03/04/1991 to cope with any input
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*
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* 28/6/95 JC
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* - rewritten to use im_clip2f() rather than own code
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* - memory leaks fixed
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* 10/9/98 JC
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* - frees memory more quickly
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* 2/4/02 JC
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* - fftw code added
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* 13/7/02 JC
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* - output Type set to IM_TYPE_FOURIER to help nip
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* 27/2/03 JC
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* - exploits real_to_complex() path in libfftw for real input (thanks
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* Matt) for a 2x speed-up
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* 17/11/03 JC
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* - fix a segv for wider than high images in the real_to_complex() path
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* (thanks Andrey)
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* - fixes to real_to_complex() path to give the correct result for
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* non-square images, including odd widths and heights
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* 3/11/04
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* - added fftw3 support
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* 7/2/10
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* - cleanups
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* - gtkdoc
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* 25/3/10
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* - have a "t" image linked to out to keep the image alive for longer
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* 27/1/12
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* - better setting of interpretation
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* - remove own fft fallback code
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* - remove fftw2 path
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* - reduce memuse
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* 3/1/14
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* - redone as a class
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*/
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/*
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This file is part of VIPS.
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VIPS is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA
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*/
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/*
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These files are distributed with VIPS - http://www.vips.ecs.soton.ac.uk
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*/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif /*HAVE_CONFIG_H*/
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#include <vips/intl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <vips/vips.h>
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#include "pfreqfilt.h"
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#ifdef HAVE_FFTW
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#include <fftw3.h>
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typedef struct _VipsFwfft {
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VipsFreqfilt parent_instance;
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VipsImage *in;
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} VipsFwfft;
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typedef VipsFreqfiltClass VipsFwfftClass;
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G_DEFINE_TYPE( VipsFwfft, vips_fwfft, VIPS_TYPE_FREQFILT );
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/* Real to complex forward transform.
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*/
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static int
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rfwfft1( VipsFwfft *fwfft, VipsImage *in, VipsImage **out )
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{
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VipsImage **t = (VipsImage **)
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vips_object_local_array( VIPS_OBJECT( fwfft ), 4 );
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VipsObjectClass *class = VIPS_OBJECT_GET_CLASS( fwfft );
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const guint64 size = VIPS_IMAGE_N_PELS( in );
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const int half_width = in->Xsize / 2 + 1;
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double *half_complex;
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double *planner_scratch;
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fftw_plan plan;
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double *buf, *q, *p;
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int x, y;
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if( vips_check_mono( class->nickname, in ) ||
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vips_check_uncoded( class->nickname, in ) )
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return( -1 );
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/* Convert input to a real double membuffer.
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*/
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t[1] = vips_image_new_buffer();
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if( vips_cast_double( in, &t[0], NULL ) ||
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vips_image_write( t[0], t[1] ) );
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/* Make the plan for the transform. Yes, they really do use nx for
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* height and ny for width. Use a separate scratch buffer for the
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* planner, we can't overwrite real->data
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*/
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if( !(planner_scratch = VIPS_ARRAY( fwfft,
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VIPS_IMAGE_N_PELS( in ), double )) )
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return( -1 );
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if( !(half_complex = VIPS_ARRAY( fwfft,
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in->Ysize * half_width * 2, double )) )
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return( -1 );
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if( !(plan = fftw_plan_dft_r2c_2d( in->Ysize, in->Xsize,
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planner_scratch, (fftw_complex *) half_complex,
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0 )) ) {
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vips_error( class->nickname,
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"%s", _( "unable to create transform plan" ) );
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return( -1 );
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}
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fftw_execute_dft_r2c( plan,
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(double *) t[1]->data, (fftw_complex *) half_complex );
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fftw_destroy_plan( plan );
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/* Write to out as another memory buffer.
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*/
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*out = vips_image_new_buffer();
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if( vips_image_pipelinev( *out, VIPS_DEMAND_STYLE_ANY, in, NULL ) )
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return( -1 );
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(*out)->BandFmt = VIPS_FORMAT_DPCOMPLEX;
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(*out)->Type = VIPS_INTERPRETATION_FOURIER;
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if( !(buf = VIPS_ARRAY( fwfft, VIPS_IMAGE_N_PELS( *out ), double )) )
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return( -1 );
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/* Copy and normalise. The right half is the up/down and
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* left/right flip of the left, but conjugated. Do the first
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* row separately, then mirror around the centre row.
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*/
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p = half_complex;
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q = buf;
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for( x = 0; x < half_width; x++ ) {
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q[0] = p[0] / size;
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q[1] = p[1] / size;
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p += 2;
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q += 2;
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}
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p = half_complex + ((in->Xsize + 1) / 2 - 1) * 2;
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for( x = half_width; x < (*out)->Xsize; x++ ) {
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q[0] = p[0] / size;
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q[1] = -1.0 * p[1] / size;
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p -= 2;
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q += 2;
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}
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if( vips_image_write_line( *out, 0, (VipsPel *) buf ) )
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return( -1 );
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for( y = 1; y < (*out)->Ysize; y++ ) {
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p = half_complex + y * half_width * 2;
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q = buf;
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for( x = 0; x < half_width; x++ ) {
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q[0] = p[0] / size;
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q[1] = p[1] / size;
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p += 2;
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q += 2;
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}
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/* Good grief.
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*/
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p = half_complex + 2 *
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(((*out)->Ysize - y + 1) * half_width - 2 +
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(in->Xsize & 1));
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for( x = half_width; x < (*out)->Xsize; x++ ) {
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q[0] = p[0] / size;
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q[1] = -1.0 * p[1] / size;
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p -= 2;
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q += 2;
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}
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if( vips_image_write_line( *out, y, (VipsPel *) buf ) )
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return( -1 );
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}
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return( 0 );
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}
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/* Complex to complex forward transform.
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*/
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static int
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cfwfft1( VipsFwfft *fwfft, VipsImage *in, VipsImage **out )
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{
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VipsImage **t = (VipsImage **)
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vips_object_local_array( VIPS_OBJECT( fwfft ), 4 );
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VipsObjectClass *class = VIPS_OBJECT_GET_CLASS( fwfft );
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fftw_plan plan;
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double *planner_scratch;
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double *buf, *q, *p;
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int x, y;
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if( vips_check_mono( class->nickname, in ) ||
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vips_check_uncoded( class->nickname, in ) )
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return( -1 );
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/* Convert input to a complex double membuffer.
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*/
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t[1] = vips_image_new_buffer();
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if( vips_cast_dpcomplex( in, &t[0], NULL ) ||
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vips_image_write( t[0], t[1] ) );
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/* We have to have a separate buffer for the planner to work on.
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*/
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if( !(planner_scratch = VIPS_ARRAY( fwfft,
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VIPS_IMAGE_N_PELS( in ) * 2, double )) )
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return( -1 );
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/* Make the plan for the transform.
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*/
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if( !(plan = fftw_plan_dft_2d( in->Ysize, in->Xsize,
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(fftw_complex *) planner_scratch,
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(fftw_complex *) planner_scratch,
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FFTW_FORWARD,
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0 )) ) {
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vips_error( class->nickname,
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"%s", _( "unable to create transform plan" ) );
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return( -1 );
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}
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fftw_execute_dft( plan,
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(fftw_complex *) t[1]->data, (fftw_complex *) t[1]->data );
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fftw_destroy_plan( plan );
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/* Write to out as another memory buffer.
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*/
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*out = vips_image_new_buffer();
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if( vips_image_pipelinev( *out, VIPS_DEMAND_STYLE_ANY, in, NULL ) )
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return( -1 );
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(*out)->BandFmt = VIPS_FORMAT_DPCOMPLEX;
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(*out)->Type = VIPS_INTERPRETATION_FOURIER;
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if( !(buf = VIPS_ARRAY( fwfft, VIPS_IMAGE_N_PELS( *out ), double )) )
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return( -1 );
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/* Copy to out, normalise.
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*/
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p = (double *) t[1]->data;
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for( y = 0; y < (*out)->Ysize; y++ ) {
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guint64 size = VIPS_IMAGE_N_PELS( *out );
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|
||||
q = buf;
|
||||
|
||||
for( x = 0; x < (*out)->Xsize; x++ ) {
|
||||
q[0] = p[0] / size;
|
||||
q[1] = p[1] / size;
|
||||
p += 2;
|
||||
q += 2;
|
||||
}
|
||||
|
||||
if( vips_image_write_line( *out, y, (VipsPel *) buf ) )
|
||||
return( -1 );
|
||||
}
|
||||
|
||||
return( 0 );
|
||||
}
|
||||
|
||||
static int
|
||||
fwfft1( VipsObject *object, VipsImage *in, VipsImage **out )
|
||||
{
|
||||
VipsFwfft *fwfft = (VipsFwfft *) object;
|
||||
|
||||
if( vips_bandfmt_iscomplex( in->BandFmt ) )
|
||||
return( cfwfft1( fwfft, in, out ) );
|
||||
else
|
||||
return( rfwfft1( fwfft, in, out ) );
|
||||
}
|
||||
|
||||
static int
|
||||
vips_fwfft_build( VipsObject *object )
|
||||
{
|
||||
VipsFreqfilt *freqfilt = VIPS_FREQFILT( object );
|
||||
VipsFwfft *fwfft = (VipsFwfft *) object;
|
||||
VipsImage **t = (VipsImage **) vips_object_local_array( object, 4 );
|
||||
|
||||
if( VIPS_OBJECT_CLASS( vips_fwfft_parent_class )->
|
||||
build( object ) )
|
||||
return( -1 );
|
||||
|
||||
if( vips__fftproc( VIPS_OBJECT( fwfft ), fwfft->in, &t[0], fwfft1 ) ||
|
||||
vips_image_write( t[0], freqfilt->out ) )
|
||||
return( -1 );
|
||||
|
||||
return( 0 );
|
||||
}
|
||||
|
||||
static void
|
||||
vips_fwfft_class_init( VipsFwfftClass *class )
|
||||
{
|
||||
GObjectClass *gobject_class = G_OBJECT_CLASS( class );
|
||||
VipsObjectClass *vobject_class = VIPS_OBJECT_CLASS( class );
|
||||
|
||||
gobject_class->set_property = vips_object_set_property;
|
||||
gobject_class->get_property = vips_object_get_property;
|
||||
|
||||
vobject_class->nickname = "fwfft";
|
||||
vobject_class->description = _( "forward FFT" );
|
||||
vobject_class->build = vips_fwfft_build;
|
||||
|
||||
VIPS_ARG_IMAGE( class, "in", 0,
|
||||
_( "in" ),
|
||||
_( "Input image" ),
|
||||
VIPS_ARGUMENT_REQUIRED_INPUT,
|
||||
G_STRUCT_OFFSET( VipsFwfft, in ) );
|
||||
|
||||
}
|
||||
|
||||
static void
|
||||
vips_fwfft_init( VipsFwfft *fwfft )
|
||||
{
|
||||
}
|
||||
|
||||
#endif /*HAVE_FFTW*/
|
||||
|
||||
/**
|
||||
* vips_fwfft:
|
||||
* @in: input image
|
||||
* @out: output image
|
||||
* @...: %NULL-terminated list of optional named arguments
|
||||
*
|
||||
* Transform an image to Fourier space.
|
||||
*
|
||||
* VIPS uses the fftw Fourier Transform library. If this library was not
|
||||
* available when VIPS was configured, these functions will fail.
|
||||
*
|
||||
* See also: vips_invfft().
|
||||
*
|
||||
* Returns: 0 on success, -1 on error.
|
||||
*/
|
||||
int
|
||||
vips_fwfft( VipsImage *in, VipsImage **out, ... )
|
||||
{
|
||||
va_list ap;
|
||||
int result;
|
||||
|
||||
va_start( ap, out );
|
||||
result = vips_call_split( "fwfft", ap, in, out );
|
||||
va_end( ap );
|
||||
|
||||
return( result );
|
||||
}
|
||||
|
||||
@ -304,6 +304,7 @@ fwfft1( IMAGE *dummy, IMAGE *in, IMAGE *out )
|
||||
}
|
||||
|
||||
#endif
|
||||
typedef int (*im__fftproc_fn)( VipsImage *, VipsImage *, VipsImage * );
|
||||
|
||||
/* Transform an n-band image with a 1-band processing function.
|
||||
*
|
||||
|
||||
82
libvips/freq_filt/pfreqfilt.h
Normal file
82
libvips/freq_filt/pfreqfilt.h
Normal file
@ -0,0 +1,82 @@
|
||||
/* base class for all freqfilt operations
|
||||
*/
|
||||
|
||||
/*
|
||||
|
||||
Copyright (C) 1991-2005 The National Gallery
|
||||
|
||||
This library is free software; you can redistribute it and/or
|
||||
modify it under the terms of the GNU Lesser General Public
|
||||
License as published by the Free Software Foundation; either
|
||||
version 2.1 of the License, or (at your option) any later version.
|
||||
|
||||
This library 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 library; if not, write to the Free Software
|
||||
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
|
||||
02110-1301 USA
|
||||
|
||||
*/
|
||||
|
||||
/*
|
||||
|
||||
These files are distributed with VIPS - http://www.vips.ecs.soton.ac.uk
|
||||
|
||||
*/
|
||||
|
||||
#ifndef VIPS_PFREQFILT_H
|
||||
#define VIPS_PFREQFILT_H
|
||||
|
||||
#ifdef __cplusplus
|
||||
extern "C" {
|
||||
#endif /*__cplusplus*/
|
||||
|
||||
#include <vips/vector.h>
|
||||
|
||||
#define VIPS_TYPE_FREQFILT (vips_freqfilt_get_type())
|
||||
#define VIPS_FREQFILT( obj ) \
|
||||
(G_TYPE_CHECK_INSTANCE_CAST( (obj), \
|
||||
VIPS_TYPE_FREQFILT, VipsFreqfilt ))
|
||||
#define VIPS_FREQFILT_CLASS( klass ) \
|
||||
(G_TYPE_CHECK_CLASS_CAST( (klass), \
|
||||
VIPS_TYPE_FREQFILT, VipsFreqfiltClass))
|
||||
#define VIPS_IS_FREQFILT( obj ) \
|
||||
(G_TYPE_CHECK_INSTANCE_TYPE( (obj), VIPS_TYPE_FREQFILT ))
|
||||
#define VIPS_IS_FREQFILT_CLASS( klass ) \
|
||||
(G_TYPE_CHECK_CLASS_TYPE( (klass), VIPS_TYPE_FREQFILT ))
|
||||
#define VIPS_FREQFILT_GET_CLASS( obj ) \
|
||||
(G_TYPE_INSTANCE_GET_CLASS( (obj), \
|
||||
VIPS_TYPE_FREQFILT, VipsFreqfiltClass ))
|
||||
|
||||
typedef struct _VipsFreqfilt {
|
||||
VipsOperation parent_instance;
|
||||
|
||||
/* All have an output image.
|
||||
*/
|
||||
VipsImage *out;
|
||||
|
||||
} VipsFreqfilt;
|
||||
|
||||
typedef struct _VipsFreqfiltClass {
|
||||
VipsOperationClass parent_class;
|
||||
|
||||
} VipsFreqfiltClass;
|
||||
|
||||
GType vips_freqfilt_get_type( void );
|
||||
|
||||
typedef int (*VipsFftProcessFn)( VipsObject *, VipsImage *, VipsImage ** );
|
||||
|
||||
int vips__fftproc( VipsObject *context,
|
||||
VipsImage *in, VipsImage **out, VipsFftProcessFn fn );
|
||||
|
||||
#ifdef __cplusplus
|
||||
}
|
||||
#endif /*__cplusplus*/
|
||||
|
||||
#endif /*VIPS_PFREQFILT_H*/
|
||||
|
||||
|
||||
@ -105,6 +105,7 @@ void vips__cache_init( void );
|
||||
void vips__type_leak( void );
|
||||
|
||||
typedef int (*im__fftproc_fn)( VipsImage *, VipsImage *, VipsImage * );
|
||||
int im__fftproc( IMAGE *dummy, IMAGE *in, IMAGE *out, im__fftproc_fn fn );
|
||||
|
||||
/* iofuncs
|
||||
*/
|
||||
@ -200,9 +201,6 @@ int im__colour_unary( const char *domain,
|
||||
VipsImage **im__insert_base( const char *domain,
|
||||
VipsImage *in1, VipsImage *in2, VipsImage *out );
|
||||
|
||||
int im__fftproc( VipsImage *dummy,
|
||||
VipsImage *in, VipsImage *out, im__fftproc_fn fn );
|
||||
|
||||
int im__find_lroverlap( VipsImage *ref_in, VipsImage *sec_in, VipsImage *out,
|
||||
int bandno_in,
|
||||
int xref, int yref, int xsec, int ysec,
|
||||
@ -287,6 +285,7 @@ void vips_resample_operation_init( void );
|
||||
void vips_foreign_operation_init( void );
|
||||
void vips_colour_operation_init( void );
|
||||
void vips_histogram_operation_init( void );
|
||||
void vips_freqfilt_operation_init( void );
|
||||
|
||||
guint64 vips__parse_size( const char *size_string );
|
||||
|
||||
|
||||
@ -270,6 +270,7 @@ vips__init( const char *argv0 )
|
||||
vips_colour_operation_init();
|
||||
vips_histogram_operation_init();
|
||||
vips_convolution_operation_init();
|
||||
vips_freqfilt_operation_init();
|
||||
|
||||
/* Load up any plugins in the vips libdir. We don't error on failure,
|
||||
* it's too annoying to have VIPS refuse to start because of a broken
|
||||
|
||||
Loading…
Reference in New Issue
Block a user