178 lines
4.3 KiB
C
178 lines
4.3 KiB
C
/* base class for all stats operations
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*
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* properties:
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* - one image in, single value or matrix out
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* - output depends on whole of input, ie. we have a sink
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*
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* 24/8/11
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* - from im_avg.c
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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 VIPS_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/debug.h>
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#include <vips/internal.h>
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#include "statistic.h"
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G_DEFINE_ABSTRACT_TYPE( VipsStatistic, vips_statistic, VIPS_TYPE_OPERATION );
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static void *
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vips_statistic_scan_start( VipsImage *in, void *a, void *b )
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{
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VipsStatistic *statistic = VIPS_STATISTIC( a );
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VipsStatisticClass *class = VIPS_STATISTIC_GET_CLASS( statistic );
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return( class->start( statistic ) );
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}
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static int
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vips_statistic_scan( VipsRegion *region,
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void *seq, void *a, void *b, gboolean *stop )
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{
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VipsStatistic *statistic = VIPS_STATISTIC( a );
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VipsStatisticClass *class = VIPS_STATISTIC_GET_CLASS( statistic );
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VipsRect *r = ®ion->valid;
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int lsk = VIPS_REGION_LSKIP( region );
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int y;
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VipsPel *p;
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VIPS_DEBUG_MSG( "vips_statistic_scan: %d x %d @ %d x %d\n",
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r->width, r->height, r->left, r->top );
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p = VIPS_REGION_ADDR( region, r->left, r->top );
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for( y = 0; y < r->height; y++ ) {
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if( class->scan( statistic,
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seq, r->left, r->top + y, p, r->width ) )
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return( -1 );
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p += lsk;
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}
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/* If we've requested stop, pass the message on.
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*/
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if( statistic->stop )
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*stop = TRUE;
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return( 0 );
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}
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static int
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vips_statistic_scan_stop( void *seq, void *a, void *b )
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{
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VipsStatistic *statistic = VIPS_STATISTIC( a );
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VipsStatisticClass *class = VIPS_STATISTIC_GET_CLASS( statistic );
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return( class->stop( statistic, seq ) );
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}
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static int
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vips_statistic_build( VipsObject *object )
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{
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VipsStatistic *statistic = VIPS_STATISTIC( object );
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VipsStatisticClass *sclass = VIPS_STATISTIC_GET_CLASS( statistic );
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VipsImage **t = (VipsImage **) vips_object_local_array( object, 2 );
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#ifdef DEBUG
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printf( "vips_statistic_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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if( VIPS_OBJECT_CLASS( vips_statistic_parent_class )->build( object ) )
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return( -1 );
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statistic->ready = statistic->in;
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if( vips_image_decode( statistic->ready, &t[0] ) )
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return( -1 );
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statistic->ready = t[0];
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/* If there's a format table, cast the input.
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*/
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if( sclass->format_table ) {
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if( vips_cast( statistic->ready, &t[1],
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sclass->format_table[statistic->in->BandFmt], NULL ) )
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return( -1 );
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statistic->ready = t[1];
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}
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if( vips_sink( statistic->ready,
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vips_statistic_scan_start,
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vips_statistic_scan,
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vips_statistic_scan_stop,
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statistic, NULL ) )
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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_statistic_class_init( VipsStatisticClass *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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VipsOperationClass *operation_class = VIPS_OPERATION_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 = "statistic";
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vobject_class->description = _( "VIPS statistic operations" );
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vobject_class->build = vips_statistic_build;
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operation_class->flags = VIPS_OPERATION_SEQUENTIAL;
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VIPS_ARG_IMAGE( class, "in", 0,
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_( "Input" ),
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_( "Input image" ),
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VIPS_ARGUMENT_REQUIRED_INPUT,
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G_STRUCT_OFFSET( VipsStatistic, in ) );
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}
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static void
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vips_statistic_init( VipsStatistic *statistic )
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{
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}
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