# ==========================================================================
#
# ZoneMinder Netcat IP Control Protocol Module, $Date: 2009-11-25 09:20:00 +0000 (Wed, 04 Nov 2009) $, $Revision: 0001 $
# Copyright (C) 2001-2008 Philip Coombes
# Converted for use with Netcat IP Camera by Andrew Bauer (knnniggett@users.sourceforge.net)
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program 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 General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
#
# ==========================================================================
#
# This module contains the first implementation of the Netcat IP camera control
# protocol
#
package ZoneMinder::Control::Netcat;

use 5.006;
use strict;
use warnings;

require ZoneMinder::Base;
require ZoneMinder::Control;

our @ISA = qw(ZoneMinder::Control);

our %CamParams = ();

# ==========================================================================
#
# Netcat IP Control Protocol
# This script sends ONVIF compliant commands and may work with other cameras
#
# The Netcat camera gladly accepts any command with or without authentication,
# which prevented me from developing Onvif authentication in this control script.
#
# Basic preset functions are supported, but more advanced features, which make
# use of abnormally high preset numbers (ir lamp control, tours, pan speed, etc)
# may or may not work.
#
#
# Possible future improvements (for anyone to improve upon):
#    - Onvif authentication
#    - Build the SOAP commands at runtime rather than use templates
#    - Implement previously mentioned advanced features
#
# Implementing the first two will require additional Perl modules, and adding
# more dependencies to ZoneMinder is always a concern.
#
# On ControlAddress use the format :
#   ADDRESS:PORT
#   eg : 10.1.2.1:8899
#        10.0.100.1:8899
#
# Use port 8899 for the Netcat camera
#
# Make sure and place a value in the Auto Stop Timeout field.
# Recommend starting with a value of 1 second, and adjust accordingly.
#
# ==========================================================================

use ZoneMinder::Logger qw(:all);
use ZoneMinder::Config qw(:all);

use Time::HiRes qw( usleep );

sub new
{

    my $class = shift;
    my $id = shift;
    my $self = ZoneMinder::Control->new( $id );
    my $logindetails = "";
    bless( $self, $class );
    srand( time() );
    return $self;
}

our $AUTOLOAD;

sub AUTOLOAD
{
    my $self = shift;
    my $class = ref( ) || croak( "$self not object" );
    my $name = $AUTOLOAD;
    $name =~ s/.*://;
    if ( exists($self->{$name}) )
    {
        return( $self->{$name} );
    }
        Fatal( "Can't access $name member of object of class $class" );
    }

sub open
{
    my $self = shift;

    $self->loadMonitor();

    use LWP::UserAgent;
    $self->{ua} = LWP::UserAgent->new;
    $self->{ua}->agent( "ZoneMinder Control Agent/".ZoneMinder::Base::ZM_VERSION );

    $self->{state} = 'open';
}

sub close
{
    my $self = shift;
    $self->{state} = 'closed';
}

sub printMsg
{
    my $self = shift;
    my $msg = shift;
    my $msg_len = length($msg);

    Debug( $msg."[".$msg_len."]" );
}

sub sendCmd
{
    my $self = shift;
    my $cmd = shift;
    my $msg = shift;
    my $content_type = shift;
    my $result = undef;

    printMsg( $cmd, "Tx" );

    my $server_endpoint = "http://".$self->{Monitor}->{ControlAddress}."/$cmd";
    my $req = HTTP::Request->new( POST => $server_endpoint );
    $req->header('content-type' => $content_type);
    $req->header('Host' => $self->{Monitor}->{ControlAddress});
    $req->header('content-length' => length($msg));
    $req->header('accept-encoding' => 'gzip, deflate');
    $req->header('connection' => 'Close');
    $req->content($msg);

    my $res = $self->{ua}->request($req);

    if ( $res->is_success ) {
        $result = !undef;
    } else {
        Error( "After sending PTZ command, camera returned the following error:'".$res->status_line()."'" );
    }
    return( $result );
}

sub getCamParams
{
    my $self = shift;
    my $msg = '<s:Envelope xmlns:s="http://www.w3.org/2003/05/soap-envelope"><s:Body xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema"><GetImagingSettings xmlns="http://www.onvif.org/ver20/imaging/wsdl"><VideoSourceToken>MainStream</VideoSourceToken></GetImagingSettings></s:Body></s:Envelope>';
    my $server_endpoint = "http://".$self->{Monitor}->{ControlAddress}."/onvif/imaging";
    my $req = HTTP::Request->new( POST => $server_endpoint );
    $req->header('content-type' => 'application/soap+xml; charset=utf-8; action="http://www.onvif.org/ver20/imaging/wsdl/GetImagingSettings"');
    $req->header('Host' => $self->{Monitor}->{ControlAddress});
    $req->header('content-length' => length($msg));
    $req->header('accept-encoding' => 'gzip, deflate');
    $req->header('connection' => 'Close');
    $req->content($msg);

    my $res = $self->{ua}->request($req);

    if ( $res->is_success ) {
        # We should really use an xml or soap library to parse the xml tags
        my $content = $res->decoded_content;

        if ($content =~ /.*<tt:(Brightness)>(.+)<\/tt:Brightness>.*/) {
            $CamParams{$1} = $2;
        }
        if ($content =~ /.*<tt:(Contrast)>(.+)<\/tt:Contrast>.*/) {
            $CamParams{$1} = $2;
        }
    }
    else
    {
        Error( "Unable to retrieve camera image settings:'".$res->status_line()."'" );
    }
}

#autoStop
#This makes use of the ZoneMinder Auto Stop Timeout on the Control Tab
sub autoStop
{
    my $self = shift;
    my $autostop = shift;

    if( $autostop ) {
        Debug( "Auto Stop" );
        my $cmd = 'onvif/ptz_service';
        my $msg = '<s:Envelope xmlns:s="http://www.w3.org/2003/05/soap-envelope"><s:Body xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema"><Stop xmlns="http://www.onvif.org/ver20/ptz/wsdl"><ProfileToken>MainStream</ProfileToken><PanTilt>true</PanTilt><Zoom>false</Zoom></Stop></s:Body></s:Envelope>';
        my $content_type = 'application/soap+xml; charset=utf-8; action="http://www.onvif.org/ver20/ptz/wsdl/ContinuousMove"';
        usleep( $autostop );
        $self->sendCmd( $cmd, $msg, $content_type );
    }
}

# Reset the Camera
sub reset
{
    Debug( "Camera Reset" );
    my $self = shift;
    my $cmd = "";
    my $msg = '<s:Envelope xmlns:s="http://www.w3.org/2003/05/soap-envelope"><s:Body xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema"><SystemReboot xmlns="http://www.onvif.org/ver10/device/wsdl"/></s:Body></s:Envelope>';
    my $content_type = 'application/soap+xml; charset=utf-8; action="http://www.onvif.org/ver10/device/wsdl/SystemReboot"';
    $self->sendCmd( $cmd, $msg, $content_type );
}

#Up Arrow
sub moveConUp
{
    Debug( "Move Up" );
    my $self = shift;
    my $cmd = 'onvif/ptz_service';
    my $msg ='<s:Envelope xmlns:s="http://www.w3.org/2003/05/soap-envelope"><s:Body xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema"><ContinuousMove xmlns="http://www.onvif.org/ver20/ptz/wsdl"><ProfileToken>MainStream</ProfileToken><Velocity><PanTilt x="0" y="-0.5" xmlns="http://www.onvif.org/ver10/schema"/></Velocity></ContinuousMove></s:Body></s:Envelope>';
    my $content_type = 'application/soap+xml; charset=utf-8; action="http://www.onvif.org/ver20/ptz/wsdl/ContinuousMove"';
    $self->sendCmd( $cmd, $msg, $content_type );
    $self->autoStop( $self->{Monitor}->{AutoStopTimeout} );
}

#Down Arrow
#MODIFICATO x="0" y="0.5"
sub moveConDown
{
    Debug( "Move Down" );
    my $self = shift;
    my $cmd = 'onvif/ptz_service';
    my $msg ='<s:Envelope xmlns:s="http://www.w3.org/2003/05/soap-envelope"><s:Body xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema"><ContinuousMove xmlns="http://www.onvif.org/ver20/ptz/wsdl"><ProfileToken>MainStream</ProfileToken><Velocity><PanTilt x="0" y="0.5" xmlns="http://www.onvif.org/ver10/schema"/></Velocity></ContinuousMove></s:Body></s:Envelope>';
    my $content_type = 'application/soap+xml; charset=utf-8; action="http://www.onvif.org/ver20/ptz/wsdl/ContinuousMove"';
    $self->sendCmd( $cmd, $msg, $content_type );
    $self->autoStop( $self->{Monitor}->{AutoStopTimeout} );
}

#Left Arrow
#MODIFICATO x="0.5" y="0"
sub moveConLeft
{
    Debug( "Move Left" );
    my $self = shift;
    my $cmd = 'onvif/ptz_service';
    my $msg ='<s:Envelope xmlns:s="http://www.w3.org/2003/05/soap-envelope"><s:Body xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema"><ContinuousMove xmlns="http://www.onvif.org/ver20/ptz/wsdl"><ProfileToken>MainStream</ProfileToken><Velocity><PanTilt x="0.5" y="0" xmlns="http://www.onvif.org/ver10/schema"/></Velocity></ContinuousMove></s:Body></s:Envelope>';
    my $content_type = 'application/soap+xml; charset=utf-8; action="http://www.onvif.org/ver20/ptz/wsdl/ContinuousMove"';
    $self->sendCmd( $cmd, $msg, $content_type );
    $self->autoStop( $self->{Monitor}->{AutoStopTimeout} );
}

#Right Arrow
#MODIFICATO x="-0.5" y="0"
sub moveConRight
{
    Debug( "Move Right" );
    my $self = shift;
    my $cmd = 'onvif/ptz_service';
    my $msg ='<s:Envelope xmlns:s="http://www.w3.org/2003/05/soap-envelope"><s:Body xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema"><ContinuousMove xmlns="http://www.onvif.org/ver20/ptz/wsdl"><ProfileToken>MainStream</ProfileToken><Velocity><PanTilt x="-0.5" y="0" xmlns="http://www.onvif.org/ver10/schema"/></Velocity></ContinuousMove></s:Body></s:Envelope>';
    my $content_type = 'application/soap+xml; charset=utf-8; action="http://www.onvif.org/ver20/ptz/wsdl/ContinuousMove"';
    $self->sendCmd( $cmd, $msg, $content_type );
    $self->autoStop( $self->{Monitor}->{AutoStopTimeout} );
}

#Zoom In
sub zoomConTele
{
    Debug( "Zoom Tele" );
    my $self = shift;
    my $cmd = 'onvif/ptz_service';
    my $msg ='<s:Envelope xmlns:s="http://www.w3.org/2003/05/soap-envelope"><s:Body xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema"><ContinuousMove xmlns="http://www.onvif.org/ver20/ptz/wsdl"><ProfileToken>MainStream</ProfileToken><Velocity><Zoom x="0.5" xmlns="http://www.onvif.org/ver10/schema"/></Velocity></ContinuousMove></s:Body></s:Envelope>';
    my $content_type = 'application/soap+xml; charset=utf-8; action="http://www.onvif.org/ver20/ptz/wsdl/ContinuousMove"';
    $self->sendCmd( $cmd, $msg, $content_type );
    $self->autoStop( $self->{Monitor}->{AutoStopTimeout} );
}

#Zoom Out
sub zoomConWide
{
    Debug( "Zoom Wide" );
    my $self = shift;
    my $cmd = 'onvif/ptz_service';
    my $msg ='<s:Envelope xmlns:s="http://www.w3.org/2003/05/soap-envelope"><s:Body xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema"><ContinuousMove xmlns="http://www.onvif.org/ver20/ptz/wsdl"><ProfileToken>MainStream</ProfileToken><Velocity><Zoom x="-0.5" xmlns="http://www.onvif.org/ver10/schema"/></Velocity></ContinuousMove></s:Body></s:Envelope>';
    my $content_type = 'application/soap+xml; charset=utf-8; action="http://www.onvif.org/ver20/ptz/wsdl/ContinuousMove"';
    $self->sendCmd( $cmd, $msg, $content_type );
    $self->autoStop( $self->{Monitor}->{AutoStopTimeout} );
}

#Diagonally Up Right Arrow
#MODIFICATO x="-0.5" y="-0.5"
#This camera does not have builtin diagonal commands so we emulate them
sub moveConUpRight
{
    Debug( "Move Diagonally Up Right" );
    my $self = shift;
    my $cmd = 'onvif/ptz_service';
    my $msg ='<s:Envelope xmlns:s="http://www.w3.org/2003/05/soap-envelope"><s:Body xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema"><ContinuousMove xmlns="http://www.onvif.org/ver20/ptz/wsdl"><ProfileToken>MainStream</ProfileToken><Velocity><PanTilt x="-0.5" y="-0.5" xmlns="http://www.onvif.org/ver10/schema"/></Velocity></ContinuousMove></s:Body></s:Envelope>';
    my $content_type = 'application/soap+xml; charset=utf-8; action="http://www.onvif.org/ver20/ptz/wsdl/ContinuousMove"';
    $self->sendCmd( $cmd, $msg, $content_type );
    $self->autoStop( $self->{Monitor}->{AutoStopTimeout} );
}

#Diagonally Down Right Arrow
#MODIFICATO x="-0.5" y="0.5"
#This camera does not have builtin diagonal commands so we emulate them
sub moveConDownRight
{
    Debug( "Move Diagonally Down Right" );
    my $self = shift;
    my $cmd = 'onvif/ptz_service';
    my $msg ='<s:Envelope xmlns:s="http://www.w3.org/2003/05/soap-envelope"><s:Body xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema"><ContinuousMove xmlns="http://www.onvif.org/ver20/ptz/wsdl"><ProfileToken>MainStream</ProfileToken><Velocity><PanTilt x="-0.5" y="0.5" xmlns="http://www.onvif.org/ver10/schema"/></Velocity></ContinuousMove></s:Body></s:Envelope>';
    my $content_type = 'application/soap+xml; charset=utf-8; action="http://www.onvif.org/ver20/ptz/wsdl/ContinuousMove"';
    $self->sendCmd( $cmd, $msg, $content_type );
    $self->autoStop( $self->{Monitor}->{AutoStopTimeout} );
}

#Diagonally Up Left Arrow
#MODIFICATO x="0.5" y="-0.5"
#This camera does not have builtin diagonal commands so we emulate them
sub moveConUpLeft
{
    Debug( "Move Diagonally Up Left" );
    my $self = shift;
    my $cmd = 'onvif/ptz_service';
    my $msg ='<s:Envelope xmlns:s="http://www.w3.org/2003/05/soap-envelope"><s:Body xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema"><ContinuousMove xmlns="http://www.onvif.org/ver20/ptz/wsdl"><ProfileToken>MainStream</ProfileToken><Velocity><PanTilt x="0.5" y="-0.5" xmlns="http://www.onvif.org/ver10/schema"/></Velocity></ContinuousMove></s:Body></s:Envelope>';
    my $content_type = 'application/soap+xml; charset=utf-8; action="http://www.onvif.org/ver20/ptz/wsdl/ContinuousMove"';
    $self->sendCmd( $cmd, $msg, $content_type );
    $self->autoStop( $self->{Monitor}->{AutoStopTimeout} );
}

#Diagonally Down Left Arrow
#MODIFICATO x="0.5" y="0.5"
#This camera does not have builtin diagonal commands so we emulate them
sub moveConDownLeft
{
    Debug( "Move Diagonally Down Left" );
    my $self = shift;
    my $cmd = 'onvif/ptz_service';
    my $msg ='<s:Envelope xmlns:s="http://www.w3.org/2003/05/soap-envelope"><s:Body xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema"><ContinuousMove xmlns="http://www.onvif.org/ver20/ptz/wsdl"><ProfileToken>MainStream</ProfileToken><Velocity><PanTilt x="0.5" y="0.5" xmlns="http://www.onvif.org/ver10/schema"/></Velocity></ContinuousMove></s:Body></s:Envelope>';
    my $content_type = 'application/soap+xml; charset=utf-8; action="http://www.onvif.org/ver20/ptz/wsdl/ContinuousMove"';
    $self->sendCmd( $cmd, $msg, $content_type );
    $self->autoStop( $self->{Monitor}->{AutoStopTimeout} );
}

#Stop
#MODIFICATO
sub moveStop
{
    Debug( "Move Stop" );
    my $self = shift;
    my $cmd = 'onvif/ptz_service';
    my $msg ='<s:Envelope xmlns:s="http://www.w3.org/2003/05/soap-envelope"><s:Body xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema"><Stop xmlns="http://www.onvif.org/ver20/ptz/wsdl"><ProfileToken>MainStream</ProfileToken><PanTilt>true</PanTilt><Zoom>false</Zoom></Stop></s:Body></s:Envelope>';
    my $content_type = 'application/soap+xml; charset=utf-8; action="http://www.onvif.org/ver20/ptz/wsdl/Stop"';
    $self->sendCmd( $cmd, $msg, $content_type );
}

#Set Camera Preset
sub presetSet
{
    my $self = shift;
    my $params = shift;
    my $preset = $self->getParam( $params, 'preset' );
    Debug( "Set Preset $preset" );
    my $cmd = 'onvif/ptz_service';
    my $msg ='<s:Envelope xmlns:s="http://www.w3.org/2003/05/soap-envelope"><s:Body xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema"><SetPreset xmlns="http://www.onvif.org/ver20/ptz/wsdl"><ProfileToken>MainStream</ProfileToken><PresetToken>'.$preset.'</PresetToken></SetPreset></s:Body></s:Envelope>';
    my $content_type = 'application/soap+xml; charset=utf-8; action="http://www.onvif.org/ver20/ptz/wsdl/SetPreset"';
    $self->sendCmd( $cmd, $msg, $content_type );
}

#Recall Camera Preset
sub presetGoto
{
    my $self = shift;
    my $params = shift;
    my $preset = $self->getParam( $params, 'preset' );
    Debug( "Goto Preset $preset" );
    my $cmd = 'onvif/ptz_service';
    my $msg ='<s:Envelope xmlns:s="http://www.w3.org/2003/05/soap-envelope"><s:Body xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema"><GotoPreset xmlns="http://www.onvif.org/ver20/ptz/wsdl"><ProfileToken>MainStream</ProfileToken><PresetToken>'.$preset.'</PresetToken></GotoPreset></s:Body></s:Envelope>';
    my $content_type = 'application/soap+xml; charset=utf-8; action="http://www.onvif.org/ver20/ptz/wsdl/GotoPreset"';
    $self->sendCmd( $cmd, $msg, $content_type );
}

#Horizontal Patrol
#To be determined if this camera supports this feature
sub horizontalPatrol
{
    Debug( "Horizontal Patrol" );
    my $self = shift;
    my $cmd = '';
    my $msg ='';
    my $content_type = '';
#    $self->sendCmd( $cmd, $msg, $content_type );
    Error( "PTZ Command not implemented in control script." );
}

#Horizontal Patrol Stop
#To be determined if this camera supports this feature
sub horizontalPatrolStop
{
    Debug( "Horizontal Patrol Stop" );
    my $self = shift;
    my $cmd = '';
    my $msg ='';
    my $content_type = '';
#    $self->sendCmd( $cmd, $msg, $content_type );
    Error( "PTZ Command not implemented in control script." );
}

# Increase Brightness
sub irisAbsOpen
{
    Debug( "Iris $CamParams{'Brightness'}" );
    my $self = shift;
    my $params = shift;
    $self->getCamParams() unless($CamParams{'Brightness'});
    my $step = $self->getParam( $params, 'step' );
    my $max = 100;

    $CamParams{'Brightness'} += $step;
    $CamParams{'Brightness'} = $max if ($CamParams{'Brightness'} > $max);

    my $cmd = 'onvif/imaging';
    my $msg ='<s:Envelope xmlns:s="http://www.w3.org/2003/05/soap-envelope"><s:Body xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema"><SetImagingSettings xmlns="http://www.onvif.org/ver20/imaging/wsdl"><VideoSourceToken>MainStream</VideoSourceToken><ImagingSettings><Brightness xmlns="http://www.onvif.org/ver10/schema">'.$CamParams{'Brightness'}.'</Brightness></ImagingSettings><ForcePersistence>true</ForcePersistence></SetImagingSettings></s:Body></s:Envelope>';
    my $content_type = 'application/soap+xml; charset=utf-8; action="http://www.onvif.org/ver20/imaging/wsdl/SetImagingSettings"';
    $self->sendCmd( $cmd, $msg, $content_type );
}

# Decrease Brightness
sub irisAbsClose
{
    Debug( "Iris $CamParams{'Brightness'}" );
    my $self = shift;
    my $params = shift;
    $self->getCamParams() unless($CamParams{'brightness'});
    my $step = $self->getParam( $params, 'step' );
    my $min = 0;

    $CamParams{'Brightness'} -= $step;
    $CamParams{'Brightness'} = $min if ($CamParams{'Brightness'} < $min);

    my $cmd = 'onvif/imaging';
    my $msg ='<s:Envelope xmlns:s="http://www.w3.org/2003/05/soap-envelope"><s:Body xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema"><SetImagingSettings xmlns="http://www.onvif.org/ver20/imaging/wsdl"><VideoSourceToken>MainStream</VideoSourceToken><ImagingSettings><Brightness xmlns="http://www.onvif.org/ver10/schema">'.$CamParams{'Brightness'}.'</Brightness></ImagingSettings><ForcePersistence>true</ForcePersistence></SetImagingSettings></s:Body></s:Envelope>';
    my $content_type = 'application/soap+xml; charset=utf-8; action="http://www.onvif.org/ver20/imaging/wsdl/SetImagingSettings"';
    $self->sendCmd( $cmd, $msg, $content_type );
}

# Increase Contrast
sub whiteAbsIn
{
    Debug( "Iris $CamParams{'Contrast'}" );
    my $self = shift;
    my $params = shift;
    $self->getCamParams() unless($CamParams{'Contrast'});
    my $step = $self->getParam( $params, 'step' );
    my $max = 100;

    $CamParams{'Contrast'} += $step;
    $CamParams{'Contrast'} = $max if ($CamParams{'Contrast'} > $max);

    my $cmd = 'onvif/imaging';
    my $msg ='<s:Envelope xmlns:s="http://www.w3.org/2003/05/soap-envelope"><s:Body xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema"><SetImagingSettings xmlns="http://www.onvif.org/ver20/imaging/wsdl"><VideoSourceToken>MainStream</VideoSourceToken><ImagingSettings><Contrast xmlns="http://www.onvif.org/ver10/schema">'.$CamParams{'Contrast'}.'</Contrast></ImagingSettings><ForcePersistence>true</ForcePersistence></SetImagingSettings></s:Body></s:Envelope>';
    my $content_type = 'application/soap+xml; charset=utf-8; action="http://www.onvif.org/ver20/imaging/wsdl/SetImagingSettings"';
}

# Decrease Contrast
sub whiteAbsOut
{
    Debug( "Iris $CamParams{'Contrast'}" );
    my $self = shift;
    my $params = shift;
    $self->getCamParams() unless($CamParams{'Contrast'});
    my $step = $self->getParam( $params, 'step' );
    my $min = 0;

    $CamParams{'Contrast'} -= $step;
    $CamParams{'Contrast'} = $min if ($CamParams{'Contrast'} < $min);

    my $cmd = 'onvif/imaging';
    my $msg ='<s:Envelope xmlns:s="http://www.w3.org/2003/05/soap-envelope"><s:Body xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema"><SetImagingSettings xmlns="http://www.onvif.org/ver20/imaging/wsdl"><VideoSourceToken>MainStream</VideoSourceToken><ImagingSettings><Contrast xmlns="http://www.onvif.org/ver10/schema">'.$CamParams{'Contrast'}.'</Contrast></ImagingSettings><ForcePersistence>true</ForcePersistence></SetImagingSettings></s:Body></s:Envelope>';
    my $content_type = 'application/soap+xml; charset=utf-8; action="http://www.onvif.org/ver20/imaging/wsdl/SetImagingSettings"';
}

1;