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/* base class for all stats operations
*
* properties:
* - one image in, single value or matrix out
* - output depends on whole of input, ie. we have a sink
*
* 24/8/11
* - from im_avg.c
*/
/*
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
*/
/*
#define VIPS_DEBUG
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif /*HAVE_CONFIG_H*/
#include <glib/gi18n-lib.h>
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include <vips/vips.h>
#include <vips/debug.h>
#include <vips/internal.h>
#include "statistic.h"
G_DEFINE_ABSTRACT_TYPE( VipsStatistic, vips_statistic, VIPS_TYPE_OPERATION );
static void *
vips_statistic_scan_start( VipsImage *in, void *a, void *b )
{
VipsStatistic *statistic = VIPS_STATISTIC( a );
VipsStatisticClass *class = VIPS_STATISTIC_GET_CLASS( statistic );
return( class->start( statistic ) );
}
static int
vips_statistic_scan( VipsRegion *region,
void *seq, void *a, void *b, gboolean *stop )
{
VipsStatistic *statistic = VIPS_STATISTIC( a );
VipsStatisticClass *class = VIPS_STATISTIC_GET_CLASS( statistic );
VipsRect *r = ®ion->valid;
int lsk = VIPS_REGION_LSKIP( region );
int y;
VipsPel *p;
VIPS_DEBUG_MSG( "vips_statistic_scan: %d x %d @ %d x %d\n",
r->width, r->height, r->left, r->top );
p = VIPS_REGION_ADDR( region, r->left, r->top );
for( y = 0; y < r->height; y++ ) {
if( class->scan( statistic,
seq, r->left, r->top + y, p, r->width ) )
return( -1 );
p += lsk;
}
/* If we've requested stop, pass the message on.
*/
if( statistic->stop )
*stop = TRUE;
return( 0 );
}
static int
vips_statistic_scan_stop( void *seq, void *a, void *b )
{
VipsStatistic *statistic = VIPS_STATISTIC( a );
VipsStatisticClass *class = VIPS_STATISTIC_GET_CLASS( statistic );
return( class->stop( statistic, seq ) );
}
static int
vips_statistic_build( VipsObject *object )
{
VipsStatistic *statistic = VIPS_STATISTIC( object );
VipsStatisticClass *sclass = VIPS_STATISTIC_GET_CLASS( statistic );
VipsImage **t = (VipsImage **) vips_object_local_array( object, 2 );
#ifdef DEBUG
printf( "vips_statistic_build: " );
vips_object_print_name( object );
printf( "\n" );
#endif /*DEBUG*/
if( VIPS_OBJECT_CLASS( vips_statistic_parent_class )->build( object ) )
return( -1 );
statistic->ready = statistic->in;
if( vips_image_decode( statistic->ready, &t[0] ) )
return( -1 );
statistic->ready = t[0];
/* If there's a format table, cast the input.
*/
if( sclass->format_table ) {
if( vips_cast( statistic->ready, &t[1],
sclass->format_table[statistic->in->BandFmt], NULL ) )
return( -1 );
statistic->ready = t[1];
}
if( vips_sink( statistic->ready,
vips_statistic_scan_start,
vips_statistic_scan,
vips_statistic_scan_stop,
statistic, NULL ) )
return( -1 );
return( 0 );
}
static void
vips_statistic_class_init( VipsStatisticClass *class )
{
GObjectClass *gobject_class = G_OBJECT_CLASS( class );
VipsObjectClass *vobject_class = VIPS_OBJECT_CLASS( class );
VipsOperationClass *operation_class = VIPS_OPERATION_CLASS( class );
gobject_class->set_property = vips_object_set_property;
gobject_class->get_property = vips_object_get_property;
vobject_class->nickname = "statistic";
vobject_class->description = _( "VIPS statistic operations" );
vobject_class->build = vips_statistic_build;
operation_class->flags = VIPS_OPERATION_SEQUENTIAL;
VIPS_ARG_IMAGE( class, "in", 0,
_( "Input" ),
_( "Input image" ),
VIPS_ARGUMENT_REQUIRED_INPUT,
G_STRUCT_OFFSET( VipsStatistic, in ) );
}
static void
vips_statistic_init( VipsStatistic *statistic )
{
}
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