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#------------------------------------------------------------------------------
# File: Apple.pm
#
# Description: Apple EXIF maker notes tags
#
# Revisions: 2013-09-13 - P. Harvey Created
#
# References: 1) http://www.photoinvestigator.co/blog/the-mystery-of-maker-apple-metadata/
#------------------------------------------------------------------------------
package Image::ExifTool::Apple;
use strict;
use vars qw($VERSION);
use Image::ExifTool::Exif;
use Image::ExifTool::PLIST;
$VERSION = '1.04';
# Apple iPhone metadata (ref PH)
%Image::ExifTool::Apple::Main = (
WRITE_PROC => \&Image::ExifTool::Exif::WriteExif,
CHECK_PROC => \&Image::ExifTool::Exif::CheckExif,
WRITABLE => 1,
GROUPS => { 0 => 'MakerNotes', 2 => 'Image' },
NOTES => 'Tags extracted from the maker notes of iPhone images.',
# 0x0001 - int32s: seen 0,1,2,3,4,9
# 0x0002 - binary plist with a single data object of size 512 bytes (iPhone5s)
0x0003 => {
Name => 'RunTime', # (includes time plugged in, but not when suspended, ref 1)
SubDirectory => { TagTable => 'Image::ExifTool::Apple::RunTime' },
},
# 0x0004 - int32s: normally 1, but 0 for low-light images
# 0x0005 - int32s: seen values 113-247, and 100 for blank images
# 0x0006 - int32s: seen values 27-258, and 20 for blank images
# 0x0007 - int32s: seen 1
0x0008 => { #1
Name => 'AccelerationVector',
Groups => { 2 => 'Camera' },
Writable => 'rational64s',
Count => 3,
# Note: the directions are contrary to the Apple documentation (which have the
# signs of all axes reversed -- apparently the Apple geeks aren't very good
# with basic physics, and don't understand the concept of acceleration. See
# http://nscookbook.com/2013/03/ios-programming-recipe-19-using-core-motion-to-access-gyro-and-accelerometer/
# for one of the few correct descriptions of this). Note that this leads to
# a left-handed coordinate system for acceleration.
Notes => q{
XYZ coordinates of the acceleration vector in units of g. As viewed from
the front of the phone, positive X is toward the left side, positive Y is
toward the bottom, and positive Z points into the face of the phone
},
},
# 0x0009 - int32s: seen 19,275,531,4371
0x000a => {
Name => 'HDRImageType',
Writable => 'int32s',
PrintConv => {
# 2 => ? (iPad mini 2)
3 => 'HDR Image',
4 => 'Original Image',
},
},
0x000b => {
Name => 'BurstUUID',
Writable => 'string',
Notes => 'unique ID for all images in a burst',
},
# 0x000c - rational64s[2]: eg) "0.1640625 0.19921875"
# 0x000d - int32s: 0,1,6,20,24,32,40
# 0x000e - int32s: 0,1,4,12 (Orienation? 0=landscape? 4=portrait? ref 1)
# 0x000f - int32s: 2,3
# 0x0010 - int32s: 1
0x0011 => {
Name => 'ContentIdentifier', #forum8750
Writable => 'string',
},
# 0x0014 - int32s: 1,2,3,4,5 (iPhone 6s, iOS 6.1)
0x0015 => {
Name => 'ImageUniqueID',
Writable => 'string',
},
# 0x0016 - string[29]: "AXZ6pMTOh2L+acSh4Kg630XCScoO\0"
# 0x0017 - int32s: 0,8192
# 0x0019 - int32s: 0,2,128
# 0x001a - string[6]: "q825s\0"
# 0x001f - int32s: 0
);
# PLIST-format CMTime structure (ref PH)
# (CMTime ref https://developer.apple.com/library/ios/documentation/CoreMedia/Reference/CMTime/Reference/reference.html)
%Image::ExifTool::Apple::RunTime = (
PROCESS_PROC => \&Image::ExifTool::PLIST::ProcessBinaryPLIST,
GROUPS => { 0 => 'MakerNotes', 2 => 'Image' },
NOTES => q{
This PLIST-format information contains the elements of a CMTime structure
representing the amount of time the phone has been running since the last
boot, not including standby time.
},
timescale => { Name => 'RunTimeScale' }, # (seen 1000000000 --> ns)
epoch => { Name => 'RunTimeEpoch' }, # (seen 0)
value => { Name => 'RunTimeValue' }, # (should divide by RunTimeScale to get seconds)
flags => {
Name => 'RunTimeFlags',
PrintConv => { BITMASK => {
0 => 'Valid',
1 => 'Has been rounded',
2 => 'Positive infinity',
3 => 'Negative infinity',
4 => 'Indefinite',
}},
},
);
# Apple composite tags
%Image::ExifTool::Apple::Composite = (
GROUPS => { 2 => 'Camera' },
RunTimeSincePowerUp => {
Require => {
0 => 'Apple:RunTimeValue',
1 => 'Apple:RunTimeScale',
},
ValueConv => '$val[1] ? $val[0] / $val[1] : undef',
PrintConv => 'ConvertDuration($val)',
},
);
# add our composite tags
Image::ExifTool::AddCompositeTags('Image::ExifTool::Apple');
1; # end
__END__
=head1 NAME
Image::ExifTool::Apple - Apple EXIF maker notes tags
=head1 SYNOPSIS
This module is loaded automatically by Image::ExifTool when required.
=head1 DESCRIPTION
This module contains definitions required by Image::ExifTool to interpret
Apple maker notes in EXIF information.
=head1 AUTHOR
Copyright 2003-2018, Phil Harvey (phil at owl.phy.queensu.ca)
This library is free software; you can redistribute it and/or modify it
under the same terms as Perl itself.
=head1 SEE ALSO
L<Image::ExifTool::TagNames/Apple Tags>,
L<Image::ExifTool(3pm)|Image::ExifTool>
=cut
|
