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#------------------------------------------------------------------------------ |
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# File: Apple.pm |
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# |
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# Description: Apple EXIF maker notes tags |
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# |
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# Revisions: 2013-09-13 - P. Harvey Created |
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# |
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# References: 1) http://www.photoinvestigator.co/blog/the-mystery-of-maker-apple-metadata/ |
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#------------------------------------------------------------------------------ |
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package Image::ExifTool::Apple; |
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use strict; |
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use vars qw($VERSION); |
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use Image::ExifTool::Exif; |
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use Image::ExifTool::PLIST; |
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$VERSION = '1.05'; |
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# Apple iPhone metadata (ref PH) |
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%Image::ExifTool::Apple::Main = ( |
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WRITE_PROC => \&Image::ExifTool::Exif::WriteExif, |
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CHECK_PROC => \&Image::ExifTool::Exif::CheckExif, |
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WRITABLE => 1, |
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GROUPS => { 0 => 'MakerNotes', 2 => 'Image' }, |
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NOTES => 'Tags extracted from the maker notes of iPhone images.', |
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# 0x0001 - int32s: seen 0,1,2,3,4,9 |
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# 0x0002 - binary plist with a single data object of size 512 bytes (iPhone5s) |
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0x0003 => { |
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Name => 'RunTime', # (includes time plugged in, but not when suspended, ref 1) |
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SubDirectory => { TagTable => 'Image::ExifTool::Apple::RunTime' }, |
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}, |
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# 0x0004 - int32s: normally 1, but 0 for low-light images |
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# 0x0005 - int32s: seen values 113-247, and 100 for blank images |
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# 0x0006 - int32s: seen values 27-258, and 20 for blank images |
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# 0x0007 - int32s: seen 1 |
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0x0008 => { #1 |
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Name => 'AccelerationVector', |
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Groups => { 2 => 'Camera' }, |
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Writable => 'rational64s', |
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Count => 3, |
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# Note: the directions are contrary to the Apple documentation (which have the |
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# signs of all axes reversed -- apparently the Apple geeks aren't very good |
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# with basic physics, and don't understand the concept of acceleration. See |
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# http://nscookbook.com/2013/03/ios-programming-recipe-19-using-core-motion-to-access-gyro-and-accelerometer/ |
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# for one of the few correct descriptions of this). Note that this leads to |
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# a left-handed coordinate system for acceleration. |
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Notes => q{ |
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XYZ coordinates of the acceleration vector in units of g. As viewed from |
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the front of the phone, positive X is toward the left side, positive Y is |
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toward the bottom, and positive Z points into the face of the phone |
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}, |
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}, |
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# 0x0009 - int32s: seen 19,275,531,4371 |
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0x000a => { |
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Name => 'HDRImageType', |
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Writable => 'int32s', |
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PrintConv => { |
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# 2 => ? (iPad mini 2) |
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3 => 'HDR Image', |
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4 => 'Original Image', |
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}, |
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}, |
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0x000b => { |
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Name => 'BurstUUID', |
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Writable => 'string', |
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Notes => 'unique ID for all images in a burst', |
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}, |
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# 0x000c - rational64s[2]: eg) "0.1640625 0.19921875" |
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# 0x000d - int32s: 0,1,6,20,24,32,40 |
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# 0x000e - int32s: 0,1,4,12 (Orientation? 0=landscape? 4=portrait? ref 1) |
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# 0x000f - int32s: 2,3 |
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# 0x0010 - int32s: 1 |
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0x0011 => { |
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Name => 'MediaGroupUUID', #NealKrawetz private communication |
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# (changed in 12.19 from Name => 'ContentIdentifier', #forum8750) |
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Writable => 'string', |
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}, |
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# 0x0014 - int32s: 1,2,3,4,5 (iPhone 6s, iOS 6.1) |
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0x0015 => { |
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Name => 'ImageUniqueID', |
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Writable => 'string', |
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}, |
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# 0x0016 - string[29]: "AXZ6pMTOh2L+acSh4Kg630XCScoO\0" |
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# 0x0017 - int32s: 0,8192 |
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# 0x0019 - int32s: 0,2,128 |
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# 0x001a - string[6]: "q825s\0" |
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# 0x001f - int32s: 0 |
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); |
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# PLIST-format CMTime structure (ref PH) |
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# (CMTime ref https://developer.apple.com/library/ios/documentation/CoreMedia/Reference/CMTime/Reference/reference.html) |
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%Image::ExifTool::Apple::RunTime = ( |
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PROCESS_PROC => \&Image::ExifTool::PLIST::ProcessBinaryPLIST, |
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GROUPS => { 0 => 'MakerNotes', 2 => 'Image' }, |
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NOTES => q{ |
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This PLIST-format information contains the elements of a CMTime structure |
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representing the amount of time the phone has been running since the last |
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boot, not including standby time. |
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}, |
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timescale => { Name => 'RunTimeScale' }, # (seen 1000000000 --> ns) |
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epoch => { Name => 'RunTimeEpoch' }, # (seen 0) |
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value => { Name => 'RunTimeValue' }, # (should divide by RunTimeScale to get seconds) |
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flags => { |
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Name => 'RunTimeFlags', |
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PrintConv => { BITMASK => { |
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0 => 'Valid', |
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1 => 'Has been rounded', |
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2 => 'Positive infinity', |
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3 => 'Negative infinity', |
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4 => 'Indefinite', |
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}}, |
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}, |
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); |
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# Apple composite tags |
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%Image::ExifTool::Apple::Composite = ( |
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GROUPS => { 2 => 'Camera' }, |
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RunTimeSincePowerUp => { |
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Require => { |
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0 => 'Apple:RunTimeValue', |
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1 => 'Apple:RunTimeScale', |
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}, |
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ValueConv => '$val[1] ? $val[0] / $val[1] : undef', |
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PrintConv => 'ConvertDuration($val)', |
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}, |
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); |
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# add our composite tags |
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Image::ExifTool::AddCompositeTags('Image::ExifTool::Apple'); |
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1; # end |
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__END__ |