606 lines
20 KiB
Perl
606 lines
20 KiB
Perl
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#------------------------------------------------------------------------------
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# File: JPEG.pm
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#
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# Description: Definitions for uncommon JPEG segments
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#
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# Revisions: 10/06/2006 - P. Harvey Created
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#------------------------------------------------------------------------------
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package Image::ExifTool::JPEG;
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use strict;
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use vars qw($VERSION);
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use Image::ExifTool qw(:DataAccess :Utils);
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$VERSION = '1.25';
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sub ProcessOcad($$$);
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sub ProcessJPEG_HDR($$$);
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# (this main JPEG table is for documentation purposes only)
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%Image::ExifTool::JPEG::Main = (
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NOTES => 'This table lists information extracted by ExifTool from JPEG images.',
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APP0 => [{
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Name => 'JFIF',
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Condition => '$$valPt =~ /^JFIF\0/',
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SubDirectory => { TagTable => 'Image::ExifTool::JFIF::Main' },
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}, {
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Name => 'JFXX',
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Condition => '$$valPt =~ /^JFXX\0\x10/',
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SubDirectory => { TagTable => 'Image::ExifTool::JFIF::Extension' },
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}, {
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Name => 'CIFF',
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Condition => '$$valPt =~ /^(II|MM).{4}HEAPJPGM/s',
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SubDirectory => { TagTable => 'Image::ExifTool::CanonRaw::Main' },
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}, {
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Name => 'AVI1',
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Condition => '$$valPt =~ /^AVI1/',
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SubDirectory => { TagTable => 'Image::ExifTool::JPEG::AVI1' },
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}, {
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Name => 'Ocad',
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Condition => '$$valPt =~ /^Ocad/',
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SubDirectory => { TagTable => 'Image::ExifTool::JPEG::Ocad' },
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}],
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APP1 => [{
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Name => 'EXIF',
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Condition => '$$valPt =~ /^Exif\0/',
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SubDirectory => { TagTable => 'Image::ExifTool::Exif::Main' },
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}, {
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Name => 'ExtendedXMP',
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Condition => '$$valPt =~ m{^http://ns.adobe.com/xmp/extension/\0}',
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SubDirectory => { TagTable => 'Image::ExifTool::XMP::Main' },
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}, {
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Name => 'XMP',
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Condition => '$$valPt =~ /^http/ or $$valPt =~ /<exif:/',
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SubDirectory => { TagTable => 'Image::ExifTool::XMP::Main' },
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}, {
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Name => 'QVCI',
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Condition => '$$valPt =~ /^QVCI\0/',
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SubDirectory => { TagTable => 'Image::ExifTool::Casio::QVCI' },
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}, {
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Name => 'FLIR',
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Condition => '$$valPt =~ /^FLIR\0/',
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SubDirectory => { TagTable => 'Image::ExifTool::FLIR::FFF' },
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}],
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APP2 => [{
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Name => 'ICC_Profile',
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Condition => '$$valPt =~ /^ICC_PROFILE\0/',
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SubDirectory => { TagTable => 'Image::ExifTool::ICC_Profile::Main' },
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}, {
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Name => 'FPXR',
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Condition => '$$valPt =~ /^FPXR\0/',
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SubDirectory => { TagTable => 'Image::ExifTool::FlashPix::Main' },
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}, {
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Name => 'MPF',
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Condition => '$$valPt =~ /^MPF\0/',
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SubDirectory => { TagTable => 'Image::ExifTool::MPF::Main' },
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}, {
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Name => 'PreviewImage',
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Condition => '$$valPt =~ /^(|QVGA\0|BGTH)\xff\xd8\xff\xdb/',
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Notes => 'Samsung APP2 preview image', # (Samsung/GoPro="", BenQ="QVGA\0", Digilife="BGTH")
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}],
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APP3 => [{
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Name => 'Meta',
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Condition => '$$valPt =~ /^(Meta|META|Exif)\0\0/',
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SubDirectory => { TagTable => 'Image::ExifTool::Kodak::Meta' },
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}, {
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Name => 'Stim',
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Condition => '$$valPt =~ /^Stim\0/',
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SubDirectory => { TagTable => 'Image::ExifTool::Stim::Main' },
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}, {
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Name => 'PreviewImage', # (written by HP R837 and Samsung S1060)
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Condition => '$$valPt =~ /^\xff\xd8\xff\xdb/',
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Notes => 'Samsung/HP preview image', # (Samsung, HP, BenQ)
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}],
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APP4 => [{
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Name => 'Scalado',
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Condition => '$$valPt =~ /^SCALADO\0/',
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SubDirectory => { TagTable => 'Image::ExifTool::Scalado::Main' },
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}, {
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Name => 'FPXR', # (non-standard location written by some HP models)
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Condition => '$$valPt =~ /^FPXR\0/',
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SubDirectory => { TagTable => 'Image::ExifTool::FlashPix::Main' },
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}, {
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Name => 'PreviewImage', # (eg. Samsung S1060)
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Notes => 'continued from APP3',
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}],
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APP5 => [{
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Name => 'RMETA',
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Condition => '$$valPt =~ /^RMETA\0/',
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SubDirectory => { TagTable => 'Image::ExifTool::Ricoh::RMETA' },
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}, {
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Name => 'PreviewImage', # (eg. BenQ DC E1050)
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Notes => 'continued from APP4',
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}],
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APP6 => [{
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Name => 'EPPIM',
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Condition => '$$valPt =~ /^EPPIM\0/',
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SubDirectory => { TagTable => 'Image::ExifTool::JPEG::EPPIM' },
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}, {
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Name => 'NITF',
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Condition => '$$valPt =~ /^NTIF\0/',
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SubDirectory => { TagTable => 'Image::ExifTool::JPEG::NITF' },
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}, {
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Name => 'HP_TDHD', # (written by R837)
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Condition => '$$valPt =~ /^TDHD\x01\0\0\0/',
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SubDirectory => { TagTable => 'Image::ExifTool::HP::TDHD' },
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}],
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APP7 => [{
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Name => 'Pentax',
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Condition => '$$valPt =~ /^PENTAX \0/',
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SubDirectory => { TagTable => 'Image::ExifTool::Pentax::Main' },
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}, {
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Name => 'Qualcomm',
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Condition => '$$valPt =~ /^\x1aQualcomm Camera Attributes/',
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SubDirectory => { TagTable => 'Image::ExifTool::Qualcomm::Main' },
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}],
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APP8 => {
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Name => 'SPIFF',
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Condition => '$$valPt =~ /^SPIFF\0/',
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SubDirectory => { TagTable => 'Image::ExifTool::JPEG::SPIFF' },
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},
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APP9 => {
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Name => 'MediaJukebox',
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Condition => '$$valPt =~ /^Media Jukebox\0/',
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SubDirectory => { TagTable => 'Image::ExifTool::JPEG::MediaJukebox' },
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},
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APP10 => {
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Name => 'Comment',
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Condition => '$$valPt =~ /^UNICODE\0/',
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Notes => 'PhotoStudio Unicode comment',
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},
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APP11 => {
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Name => 'JPEG-HDR',
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Condition => '$$valPt =~ /^HDR_RI /',
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SubDirectory => { TagTable => 'Image::ExifTool::JPEG::HDR' },
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},
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APP12 => [{
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Name => 'PictureInfo',
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Condition => '$$valPt =~ /(\[picture info\]|Type=)/',
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SubDirectory => { TagTable => 'Image::ExifTool::APP12::PictureInfo' },
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}, {
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Name => 'Ducky',
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Condition => '$$valPt =~ /^Ducky/',
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SubDirectory => { TagTable => 'Image::ExifTool::APP12::Ducky' },
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}],
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APP13 => [{
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Name => 'Photoshop',
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Condition => '$$valPt =~ /^(Photoshop 3.0\0|Adobe_Photoshop2.5)/',
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SubDirectory => { TagTable => 'Image::ExifTool::Photoshop::Main' },
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}, {
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Name => 'Adobe_CM',
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Condition => '$$valPt =~ /^Adobe_CM/',
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SubDirectory => { TagTable => 'Image::ExifTool::JPEG::AdobeCM' },
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}],
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APP14 => {
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Name => 'Adobe',
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Condition => '$$valPt =~ /^Adobe/',
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Writable => 1, # (for docs only)
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SubDirectory => { TagTable => 'Image::ExifTool::JPEG::Adobe' },
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},
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APP15 => {
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Name => 'GraphicConverter',
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Condition => '$$valPt =~ /^Q\s*(\d+)/',
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SubDirectory => { TagTable => 'Image::ExifTool::JPEG::GraphConv' },
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},
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# APP15 - Also unknown "TEXT\0" segment stored by Casio/FujiFilm
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COM => {
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Name => 'Comment',
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# note: flag as writable for documentation, but it won't show up
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# in the TagLookup as writable because there is no WRITE_PROC
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Writable => 1,
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},
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SOF => {
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Name => 'StartOfFrame',
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SubDirectory => { TagTable => 'Image::ExifTool::JPEG::SOF' },
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},
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DQT => {
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Name => 'DefineQuantizationTable',
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Notes => 'used to calculate the Extra JPEGDigest tag value',
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},
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Trailer => [{
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Name => 'AFCP',
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Condition => '$$valPt =~ /AXS(!|\*).{8}$/s',
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SubDirectory => { TagTable => 'Image::ExifTool::AFCP::Main' },
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}, {
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Name => 'CanonVRD',
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Condition => '$$valPt =~ /CANON OPTIONAL DATA\0.{44}$/s',
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SubDirectory => { TagTable => 'Image::ExifTool::CanonVRD::Main' },
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}, {
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Name => 'FotoStation',
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Condition => '$$valPt =~ /\xa1\xb2\xc3\xd4$/',
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SubDirectory => { TagTable => 'Image::ExifTool::FotoStation::Main' },
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}, {
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Name => 'PhotoMechanic',
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Condition => '$$valPt =~ /cbipcbbl$/',
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SubDirectory => { TagTable => 'Image::ExifTool::PhotoMechanic::Main' },
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}, {
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Name => 'MIE',
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Condition => q{
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$$valPt =~ /~\0\x04\0zmie~\0\0\x06.{4}[\x10\x18]\x04$/s or
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$$valPt =~ /~\0\x04\0zmie~\0\0\x0a.{8}[\x10\x18]\x08$/s
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},
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SubDirectory => { TagTable => 'Image::ExifTool::MIE::Main' },
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}, {
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Name => 'Samsung',
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Condition => '$$valPt =~ /QDIOBS$/',
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SubDirectory => { TagTable => 'Image::ExifTool::Samsung::Trailer' },
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}, {
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Name => 'PreviewImage',
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Condition => '$$valPt =~ /^\xff\xd8\xff/',
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Writable => 1, # (for docs only)
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}],
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);
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# EPPIM APP6 (Toshiba PrintIM) segment (ref PH, from PDR-M700 samples)
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%Image::ExifTool::JPEG::EPPIM = (
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GROUPS => { 0 => 'APP6', 1 => 'EPPIM', 2 => 'Image' },
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NOTES => q{
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APP6 is used in by the Toshiba PDR-M700 to store a TIFF structure containing
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PrintIM information.
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},
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0xc4a5 => {
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Name => 'PrintIM',
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# must set Writable here so this tag will be saved with MakerNotes option
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Writable => 'undef',
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Description => 'Print Image Matching',
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SubDirectory => {
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TagTable => 'Image::ExifTool::PrintIM::Main',
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},
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},
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);
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# SPIFF APP8 segment. Refs:
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# 1) http://www.fileformat.info/format/spiff/
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# 2) http://www.jpeg.org/public/spiff.pdf
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%Image::ExifTool::JPEG::SPIFF = (
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PROCESS_PROC => \&Image::ExifTool::ProcessBinaryData,
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GROUPS => { 0 => 'APP8', 1 => 'SPIFF', 2 => 'Image' },
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NOTES => q{
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This information is found in APP8 of SPIFF-style JPEG images (the "official"
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yet rarely used JPEG file format standard: Still Picture Interchange File
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Format). See L<http://www.jpeg.org/public/spiff.pdf> for the official
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specification.
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},
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0 => {
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Name => 'SPIFFVersion',
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Format => 'int8u[2]',
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PrintConv => '$val =~ tr/ /./; $val',
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},
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2 => {
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Name => 'ProfileID',
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PrintConv => {
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0 => 'Not Specified',
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1 => 'Continuous-tone Base',
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2 => 'Continuous-tone Progressive',
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3 => 'Bi-level Facsimile',
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4 => 'Continuous-tone Facsimile',
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},
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},
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3 => 'ColorComponents',
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6 => {
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Name => 'ImageHeight',
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Notes => q{
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at index 4 in specification, but there are 2 extra bytes here in my only
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SPIFF sample, version 1.2
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},
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Format => 'int32u',
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},
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10 => {
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Name => 'ImageWidth',
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Format => 'int32u',
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},
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14 => {
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Name => 'ColorSpace',
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PrintConv => {
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0 => 'Bi-level',
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1 => 'YCbCr, ITU-R BT 709, video',
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2 => 'No color space specified',
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3 => 'YCbCr, ITU-R BT 601-1, RGB',
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4 => 'YCbCr, ITU-R BT 601-1, video',
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8 => 'Gray-scale',
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9 => 'PhotoYCC',
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10 => 'RGB',
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11 => 'CMY',
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12 => 'CMYK',
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13 => 'YCCK',
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14 => 'CIELab',
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},
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},
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15 => 'BitsPerSample',
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16 => {
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Name => 'Compression',
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PrintConv => {
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0 => 'Uncompressed, interleaved, 8 bits per sample',
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1 => 'Modified Huffman',
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2 => 'Modified READ',
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3 => 'Modified Modified READ',
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4 => 'JBIG',
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5 => 'JPEG',
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},
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},
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17 => {
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Name => 'ResolutionUnit',
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PrintConv => {
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0 => 'None',
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1 => 'inches',
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2 => 'cm',
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},
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},
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18 => {
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Name => 'YResolution',
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Format => 'int32u',
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},
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22 => {
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Name => 'XResolution',
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Format => 'int32u',
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},
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);
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# Media Jukebox APP9 segment (ref PH)
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%Image::ExifTool::JPEG::MediaJukebox = (
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GROUPS => { 0 => 'XML', 1 => 'MediaJukebox', 2 => 'Image' },
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VARS => { NO_ID => 1 },
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NOTES => 'Tags found in the XML metadata of the "Media Jukebox" APP9 segment.',
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Date => {
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Groups => { 2 => 'Time' },
|
||
|
|
# convert from days since Dec 30, 1899 to seconds since Jan 1, 1970
|
||
|
|
ValueConv => 'ConvertUnixTime(($val - (70 * 365 + 17 + 2)) * 24 * 3600)',
|
||
|
|
PrintConv => '$self->ConvertDateTime($val)',
|
||
|
|
},
|
||
|
|
Album => { },
|
||
|
|
Caption => { },
|
||
|
|
Keywords => { },
|
||
|
|
Name => { },
|
||
|
|
People => { },
|
||
|
|
Places => { },
|
||
|
|
Tool_Name => { },
|
||
|
|
Tool_Version => { },
|
||
|
|
);
|
||
|
|
|
||
|
|
# JPEG-HDR APP11 information (ref PH, guessed from http://anyhere.com/gward/papers/cic05.pdf)
|
||
|
|
%Image::ExifTool::JPEG::HDR = (
|
||
|
|
GROUPS => { 0 => 'APP11', 1 => 'JPEG-HDR', 2 => 'Image' },
|
||
|
|
PROCESS_PROC => \&ProcessJPEG_HDR,
|
||
|
|
TAG_PREFIX => '', # (no prefix for unknown tags)
|
||
|
|
NOTES => 'Information extracted from APP11 of a JPEG-HDR image.',
|
||
|
|
ver => 'JPEG-HDRVersion',
|
||
|
|
# (need names for the next 3 tags)
|
||
|
|
ln0 => { Description => 'Ln0' },
|
||
|
|
ln1 => { Description => 'Ln1' },
|
||
|
|
s2n => { Description => 'S2n' },
|
||
|
|
alp => { Name => 'Alpha' }, # (Alpha/Beta are saturation parameters)
|
||
|
|
bet => { Name => 'Beta' },
|
||
|
|
cor => { Name => 'CorrectionMethod' },
|
||
|
|
RatioImage => {
|
||
|
|
Groups => { 2 => 'Preview' },
|
||
|
|
Notes => 'the embedded JPEG-compressed ratio image',
|
||
|
|
Binary => 1,
|
||
|
|
},
|
||
|
|
);
|
||
|
|
|
||
|
|
# AdobeCM APP13 (no references)
|
||
|
|
%Image::ExifTool::JPEG::AdobeCM = (
|
||
|
|
PROCESS_PROC => \&Image::ExifTool::ProcessBinaryData,
|
||
|
|
GROUPS => { 0 => 'APP13', 1 => 'AdobeCM', 2 => 'Image' },
|
||
|
|
NOTES => q{
|
||
|
|
The "Adobe_CM" APP13 segment presumably contains color management
|
||
|
|
information, but the meaning of the data is currently unknown. If anyone
|
||
|
|
has an idea about what this means, please let me know.
|
||
|
|
},
|
||
|
|
FORMAT => 'int16u',
|
||
|
|
0 => 'AdobeCMType',
|
||
|
|
);
|
||
|
|
|
||
|
|
# Adobe APP14 refs:
|
||
|
|
# http://partners.adobe.com/public/developer/en/ps/sdk/5116.DCT_Filter.pdf
|
||
|
|
# http://java.sun.com/j2se/1.5.0/docs/api/javax/imageio/metadata/doc-files/jpeg_metadata.html#color
|
||
|
|
%Image::ExifTool::JPEG::Adobe = (
|
||
|
|
PROCESS_PROC => \&Image::ExifTool::ProcessBinaryData,
|
||
|
|
GROUPS => { 0 => 'APP14', 1 => 'Adobe', 2 => 'Image' },
|
||
|
|
NOTES => q{
|
||
|
|
The "Adobe" APP14 segment stores image encoding information for DCT filters.
|
||
|
|
This segment may be copied or deleted as a block using the Extra "Adobe"
|
||
|
|
tag, but note that it is not deleted by default when deleting all metadata
|
||
|
|
because it may affect the appearance of the image.
|
||
|
|
},
|
||
|
|
FORMAT => 'int16u',
|
||
|
|
0 => 'DCTEncodeVersion',
|
||
|
|
1 => {
|
||
|
|
Name => 'APP14Flags0',
|
||
|
|
PrintConv => {
|
||
|
|
0 => '(none)',
|
||
|
|
BITMASK => {
|
||
|
|
15 => 'Encoded with Blend=1 downsampling'
|
||
|
|
},
|
||
|
|
},
|
||
|
|
},
|
||
|
|
2 => {
|
||
|
|
Name => 'APP14Flags1',
|
||
|
|
PrintConv => {
|
||
|
|
0 => '(none)',
|
||
|
|
BITMASK => { },
|
||
|
|
},
|
||
|
|
},
|
||
|
|
3 => {
|
||
|
|
Name => 'ColorTransform',
|
||
|
|
Format => 'int8u',
|
||
|
|
PrintConv => {
|
||
|
|
0 => 'Unknown (RGB or CMYK)',
|
||
|
|
1 => 'YCbCr',
|
||
|
|
2 => 'YCCK',
|
||
|
|
},
|
||
|
|
},
|
||
|
|
);
|
||
|
|
|
||
|
|
# GraphicConverter APP15 (ref PH)
|
||
|
|
%Image::ExifTool::JPEG::GraphConv = (
|
||
|
|
GROUPS => { 0 => 'APP15', 1 => 'GraphConv', 2 => 'Image' },
|
||
|
|
NOTES => 'APP15 is used by GraphicConverter to store JPEG quality.',
|
||
|
|
'Q' => 'Quality',
|
||
|
|
);
|
||
|
|
|
||
|
|
# AVI1 APP0 segment (ref http://www.schnarff.com/file-formats/bmp/BMPDIB.TXT)
|
||
|
|
%Image::ExifTool::JPEG::AVI1 = (
|
||
|
|
PROCESS_PROC => \&Image::ExifTool::ProcessBinaryData,
|
||
|
|
GROUPS => { 0 => 'APP0', 1 => 'AVI1', 2 => 'Image' },
|
||
|
|
NOTES => 'This information may be found in APP0 of JPEG image data from AVI videos.',
|
||
|
|
FIRST_ENTRY => 0,
|
||
|
|
0 => {
|
||
|
|
Name => 'InterleavedField',
|
||
|
|
PrintConv => {
|
||
|
|
0 => 'Not Interleaved',
|
||
|
|
1 => 'Odd',
|
||
|
|
2 => 'Even',
|
||
|
|
},
|
||
|
|
},
|
||
|
|
);
|
||
|
|
|
||
|
|
# Ocad APP0 segment (ref PH)
|
||
|
|
%Image::ExifTool::JPEG::Ocad = (
|
||
|
|
PROCESS_PROC => \&ProcessOcad,
|
||
|
|
GROUPS => { 0 => 'APP0', 1 => 'Ocad', 2 => 'Image' },
|
||
|
|
TAG_PREFIX => 'Ocad',
|
||
|
|
FIRST_ENTRY => 0,
|
||
|
|
NOTES => q{
|
||
|
|
Tags extracted from the JPEG APP0 "Ocad" segment (found in Photobucket
|
||
|
|
images).
|
||
|
|
},
|
||
|
|
Rev => {
|
||
|
|
Name => 'OcadRevision',
|
||
|
|
Format => 'string[6]',
|
||
|
|
}
|
||
|
|
);
|
||
|
|
|
||
|
|
# NITF APP6 segment (National Imagery Transmission Format)
|
||
|
|
# ref http://www.gwg.nga.mil/ntb/baseline/docs/n010697/bwcguide25aug98.pdf
|
||
|
|
%Image::ExifTool::JPEG::NITF = (
|
||
|
|
PROCESS_PROC => \&Image::ExifTool::ProcessBinaryData,
|
||
|
|
GROUPS => { 0 => 'APP6', 1 => 'NITF', 2 => 'Image' },
|
||
|
|
NOTES => q{
|
||
|
|
Information in APP6 used by the National Imagery Transmission Format. See
|
||
|
|
L<http://www.gwg.nga.mil/ntb/baseline/docs/n010697/bwcguide25aug98.pdf> for
|
||
|
|
the official specification.
|
||
|
|
},
|
||
|
|
0 => {
|
||
|
|
Name => 'NITFVersion',
|
||
|
|
Format => 'int8u[2]',
|
||
|
|
ValueConv => 'sprintf("%d.%.2d", split(" ",$val))',
|
||
|
|
},
|
||
|
|
2 => {
|
||
|
|
Name => 'ImageFormat',
|
||
|
|
ValueConv => 'chr($val)',
|
||
|
|
PrintConv => { B => 'IMode B' },
|
||
|
|
},
|
||
|
|
3 => {
|
||
|
|
Name => 'BlocksPerRow',
|
||
|
|
Format => 'int16u',
|
||
|
|
},
|
||
|
|
5 => {
|
||
|
|
Name => 'BlocksPerColumn',
|
||
|
|
Format => 'int16u',
|
||
|
|
},
|
||
|
|
7 => {
|
||
|
|
Name => 'ImageColor',
|
||
|
|
PrintConv => { 0 => 'Monochrome' },
|
||
|
|
},
|
||
|
|
8 => 'BitDepth',
|
||
|
|
9 => {
|
||
|
|
Name => 'ImageClass',
|
||
|
|
PrintConv => {
|
||
|
|
0 => 'General Purpose',
|
||
|
|
4 => 'Tactical Imagery',
|
||
|
|
},
|
||
|
|
},
|
||
|
|
10 => {
|
||
|
|
Name => 'JPEGProcess',
|
||
|
|
PrintConv => {
|
||
|
|
1 => 'Baseline sequential DCT, Huffman coding, 8-bit samples',
|
||
|
|
4 => 'Extended sequential DCT, Huffman coding, 12-bit samples',
|
||
|
|
},
|
||
|
|
},
|
||
|
|
11 => 'Quality',
|
||
|
|
12 => {
|
||
|
|
Name => 'StreamColor',
|
||
|
|
PrintConv => { 0 => 'Monochrome' },
|
||
|
|
},
|
||
|
|
13 => 'StreamBitDepth',
|
||
|
|
14 => {
|
||
|
|
Name => 'Flags',
|
||
|
|
Format => 'int32u',
|
||
|
|
PrintConv => 'sprintf("0x%x", $val)',
|
||
|
|
},
|
||
|
|
);
|
||
|
|
|
||
|
|
#------------------------------------------------------------------------------
|
||
|
|
# Extract information from the JPEG APP0 Ocad segment
|
||
|
|
# Inputs: 0) ExifTool object ref, 1) dirInfo ref, 2) tag table ref
|
||
|
|
# Returns: 1 on success
|
||
|
|
sub ProcessOcad($$$)
|
||
|
|
{
|
||
|
|
my ($et, $dirInfo, $tagTablePtr) = @_;
|
||
|
|
my $dataPt = $$dirInfo{DataPt};
|
||
|
|
$et->VerboseDir('APP0 Ocad', undef, length $$dataPt);
|
||
|
|
for (;;) {
|
||
|
|
last unless $$dataPt =~ /\$(\w+):([^\0\$]+)/g;
|
||
|
|
my ($tag, $val) = ($1, $2);
|
||
|
|
$val =~ s/^\s+//; $val =~ s/\s+$//; # remove leading/trailing spaces
|
||
|
|
AddTagToTable($tagTablePtr, $tag) unless $$tagTablePtr{$tag};
|
||
|
|
$et->HandleTag($tagTablePtr, $tag, $val);
|
||
|
|
}
|
||
|
|
return 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
#------------------------------------------------------------------------------
|
||
|
|
# Extract information from the JPEG APP0 Ocad segment
|
||
|
|
# Inputs: 0) ExifTool object ref, 1) dirInfo ref, 2) tag table ref
|
||
|
|
# Returns: 1 on success
|
||
|
|
sub ProcessJPEG_HDR($$$)
|
||
|
|
{
|
||
|
|
my ($et, $dirInfo, $tagTablePtr) = @_;
|
||
|
|
my $dataPt = $$dirInfo{DataPt};
|
||
|
|
$$dataPt =~ /~\0/g or $et->Warn('Unrecognized JPEG-HDR format'), return 0;
|
||
|
|
my $pos = pos $$dataPt;
|
||
|
|
my $meta = substr($$dataPt, 7, $pos-9);
|
||
|
|
$et->VerboseDir('APP11 JPEG-HDR', undef, length $$dataPt);
|
||
|
|
while ($meta =~ /(\w+)=([^,\s]*)/g) {
|
||
|
|
my ($tag, $val) = ($1, $2);
|
||
|
|
AddTagToTable($tagTablePtr, $tag) unless $$tagTablePtr{$tag};
|
||
|
|
$et->HandleTag($tagTablePtr, $tag, $val);
|
||
|
|
}
|
||
|
|
$et->HandleTag($tagTablePtr, 'RatioImage', substr($$dataPt, $pos));
|
||
|
|
return 1;
|
||
|
|
}
|
||
|
|
|
||
|
|
1; # end
|
||
|
|
|
||
|
|
__END__
|
||
|
|
|
||
|
|
=head1 NAME
|
||
|
|
|
||
|
|
Image::ExifTool::JPEG - Definitions for uncommon JPEG segments
|
||
|
|
|
||
|
|
=head1 SYNOPSIS
|
||
|
|
|
||
|
|
This module is used by Image::ExifTool
|
||
|
|
|
||
|
|
=head1 DESCRIPTION
|
||
|
|
|
||
|
|
This module contains definitions required by Image::ExifTool for some
|
||
|
|
uncommon JPEG segments. For speed reasons, definitions for more common JPEG
|
||
|
|
segments are included in the Image::ExifTool module itself.
|
||
|
|
|
||
|
|
=head1 AUTHOR
|
||
|
|
|
||
|
|
Copyright 2003-2016, 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/JPEG Tags>,
|
||
|
|
L<Image::ExifTool(3pm)|Image::ExifTool>
|
||
|
|
|
||
|
|
=cut
|
||
|
|
|