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#------------------------------------------------------------------------------
# File: MPF.pm
#
# Description: Read Multi-Picture Format information
#
# Revisions: 06/12/2009 - P. Harvey Created
#
# References: 1) http://www.cipa.jp/std/documents/e/DC-007_E.pdf
#------------------------------------------------------------------------------
package Image::ExifTool::MPF;
use strict;
use vars qw($VERSION);
use Image::ExifTool qw(:DataAccess :Utils);
use Image::ExifTool::Exif;
$VERSION = '1.14';
sub ProcessMPImageList($$$);
# Tags found in APP2 MPF segment in JPEG images
%Image::ExifTool::MPF::Main = (
GROUPS => { 0 => 'MPF', 1 => 'MPF0', 2 => 'Image'},
NOTES => q{
These tags are part of the CIPA Multi-Picture Format specification, and are
found in the APP2 "MPF" segment of JPEG images. MPImage data referenced
from this segment is stored as a JPEG trailer. The MPF tags are not
writable, however the MPF segment may be deleted as a group (with "MPF:All")
but then the JPEG trailer should also be deleted (with "Trailer:All"). See
L<https://web.archive.org/web/20190713230858/http://www.cipa.jp/std/documents/e/DC-007_E.pdf>
for the official specification.
},
0xb000 => 'MPFVersion',
0xb001 => 'NumberOfImages',
0xb002 => {
Name => 'MPImageList',
SubDirectory => {
TagTable => 'Image::ExifTool::MPF::MPImage',
ProcessProc => \&ProcessMPImageList,
},
},
0xb003 => {
Name => 'ImageUIDList',
Binary => 1,
},
0xb004 => 'TotalFrames',
0xb101 => 'MPIndividualNum',
0xb201 => {
Name => 'PanOrientation',
PrintHex => 1,
Notes => 'long integer is split into 4 bytes',
ValueConv => 'join(" ",unpack("C*",pack("N",$val)))',
PrintConv => [
'"$val rows"',
'"$val columns"',
{
0 => '[unused]',
1 => 'Start at top right',
2 => 'Start at top left',
3 => 'Start at bottom left',
4 => 'Start at bottom right',
},
{
0x01 => 'Left to right',
0x02 => 'Right to left',
0x03 => 'Top to bottom',
0x04 => 'Bottom to top',
0x10 => 'Clockwise',
0x20 => 'Counter clockwise',
0x30 => 'Zigzag (row start)',
0x40 => 'Zigzag (column start)',
},
],
},
0xb202 => 'PanOverlapH',
0xb203 => 'PanOverlapV',
0xb204 => 'BaseViewpointNum',
0xb205 => 'ConvergenceAngle',
0xb206 => 'BaselineLength',
0xb207 => 'VerticalDivergence',
0xb208 => 'AxisDistanceX',
0xb209 => 'AxisDistanceY',
0xb20a => 'AxisDistanceZ',
0xb20b => 'YawAngle',
0xb20c => 'PitchAngle',
0xb20d => 'RollAngle',
);
# Tags found in MPImage structure
%Image::ExifTool::MPF::MPImage = (
PROCESS_PROC => \&Image::ExifTool::ProcessBinaryData,
#WRITE_PROC => \&Image::ExifTool::WriteBinaryData,
#CHECK_PROC => \&Image::ExifTool::CheckBinaryData,
#WRITABLE => 1,
GROUPS => { 0 => 'MPF', 1 => 'MPImage', 2 => 'Image'},
NOTES => q{
The first MPF "Large Thumbnail" image is extracted as PreviewImage, and the
rest of the embedded MPF images are extracted as MPImage#. The
L<ExtractEmbedded|../ExifTool.html#ExtractEmbedded> (-ee) option may be used to extract information from these
embedded images.
},
0.1 => {
Name => 'MPImageFlags',
Format => 'int32u',
Mask => 0xf8000000,
PrintConv => { BITMASK => {
2 => 'Representative image',
3 => 'Dependent child image',
4 => 'Dependent parent image',
}},
},
0.2 => {
Name => 'MPImageFormat',
Format => 'int32u',
Mask => 0x07000000,
PrintConv => {
0 => 'JPEG',
},
},
0.3 => {
Name => 'MPImageType',
Format => 'int32u',
Mask => 0x00ffffff,
PrintHex => 1,
PrintConv => {
0x000000 => 'Undefined',
0x010001 => 'Large Thumbnail (VGA equivalent)',
0x010002 => 'Large Thumbnail (full HD equivalent)',
0x020001 => 'Multi-frame Panorama',
0x020002 => 'Multi-frame Disparity',
0x020003 => 'Multi-angle',
0x030000 => 'Baseline MP Primary Image',
},
},
4 => {
Name => 'MPImageLength',
Format => 'int32u',
},
8 => {
Name => 'MPImageStart',
Format => 'int32u',
IsOffset => '$val',
},
12 => {
Name => 'DependentImage1EntryNumber',
Format => 'int16u',
},
14 => {
Name => 'DependentImage2EntryNumber',
Format => 'int16u',
},
);
# extract MP Images as composite tags
%Image::ExifTool::MPF::Composite = (
GROUPS => { 2 => 'Preview' },
MPImage => {
Require => {
0 => 'MPImageStart',
1 => 'MPImageLength',
2 => 'MPImageType',
},
Notes => q{
the first MPF "Large Thumbnail" is extracted as PreviewImage, and the rest
of the embedded MPF images are extracted as MPImage#. The L<ExtractEmbedded|../ExifTool.html#ExtractEmbedded>
option may be used to extract information from these embedded images.
},
# extract all MPF images (not just one)
RawConv => q{
require Image::ExifTool::MPF;
@grps = $self->GetGroup($$val{0}); # set groups from input tag
Image::ExifTool::MPF::ExtractMPImages($self);
},
},
);
# add our composite tags
Image::ExifTool::AddCompositeTags('Image::ExifTool::MPF');
#------------------------------------------------------------------------------
# Extract all MP images
# Inputs: 0) ExifTool object ref
# Returns: undef
sub ExtractMPImages($)
{
my $et = shift;
my $ee = $et->Options('ExtractEmbedded');
my $saveBinary = $et->Options('Binary');
my ($i, $didPreview, $xtra);
for ($i=1; $xtra or not defined $xtra; ++$i) {
# run through MP images in the same order they were extracted
$xtra = defined $$et{VALUE}{"MPImageStart ($i)"} ? " ($i)" : '';
my $off = $et->GetValue("MPImageStart$xtra", 'ValueConv');
my $len = $et->GetValue("MPImageLength$xtra", 'ValueConv');
if ($off and $len) {
my $type = $et->GetValue("MPImageType$xtra", 'ValueConv');
my $tag = "MPImage$i";
# store first "Large Thumbnail" as a PreviewImage
if (not $didPreview and $type and ($type & 0x0f0000) == 0x010000) {
$tag = 'PreviewImage';
$didPreview = 1;
}
$et->Options('Binary', 1) if $ee;
my $val = Image::ExifTool::Exif::ExtractImage($et, $off, $len, $tag);
$et->Options('Binary', $saveBinary) if $ee;
next unless defined $val;
unless ($Image::ExifTool::Extra{$tag}) {
AddTagToTable(\%Image::ExifTool::Extra, $tag, {
Name => $tag,
Groups => { 0 => 'Composite', 1 => 'Composite', 2 => 'Preview'},
});
}
my $key = $et->FoundTag($tag, $val, $et->GetGroup("MPImageStart$xtra"));
# extract information from MP images if ExtractEmbedded option used
if ($ee) {
my $oldBase = $$et{BASE};
$$et{BASE} = $off;
$$et{DOC_NUM} = $i;
$et->ExtractInfo($val, { ReEntry => 1 });
delete $$et{DOC_NUM};
$$et{BASE} = $oldBase;
}
}
}
return undef;
}
#------------------------------------------------------------------------------
# Process MP Entry list
# Inputs: 0) ExifTool object ref, 1) dirInfo ref, 2) tag table ref
# Returns: 1 on success
sub ProcessMPImageList($$$)
{
my ($et, $dirInfo, $tagTablePtr) = @_;
my $num = int($$dirInfo{DirLen} / 16); # (16 bytes per MP Entry)
$$dirInfo{DirLen} = 16;
my ($i, $success);
my $oldG1 = $$et{SET_GROUP1};
for ($i=0; $i<$num; ++$i) {
$$et{SET_GROUP1} = '+' . ($i + 1);
$success = $et->ProcessBinaryData($dirInfo, $tagTablePtr);
$$dirInfo{DirStart} += 16;
}
$$et{SET_GROUP1} = $oldG1;
return $success;
}
1; # end
__END__
=head1 NAME
Image::ExifTool::MPF - Read Multi-Picture Format information
=head1 SYNOPSIS
This module is used by Image::ExifTool
=head1 DESCRIPTION
This module contains tag definitions and routines to read Multi-Picture
Format (MPF) information from JPEG images.
=head1 AUTHOR
Copyright 2003-2023, Phil Harvey (philharvey66 at gmail.com)
This library is free software; you can redistribute it and/or modify it
under the same terms as Perl itself.
=head1 REFERENCES
=over 4
=item L<http://www.cipa.jp/std/documents/e/DC-007_E.pdf>
=back
=head1 SEE ALSO
L<Image::ExifTool::TagNames/MPF Tags>,
L<Image::ExifTool(3pm)|Image::ExifTool>
=cut
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