[16842] | 1 | #------------------------------------------------------------------------------
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| 2 | # File: AIFF.pm
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| 3 | #
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| 4 | # Description: Read AIFF meta information
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| 5 | #
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| 6 | # Revisions: 01/06/2006 - P. Harvey Created
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[24107] | 7 | # 09/22/2008 - PH Added DjVu support
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[16842] | 8 | #
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| 9 | # References: 1) http://developer.apple.com/documentation/QuickTime/INMAC/SOUND/imsoundmgr.30.htm#pgfId=3190
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| 10 | # 2) http://astronomy.swin.edu.au/~pbourke/dataformats/aiff/
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| 11 | # 3) http://www.mactech.com/articles/mactech/Vol.06/06.01/SANENormalized/
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| 12 | #------------------------------------------------------------------------------
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| 13 |
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| 14 | package Image::ExifTool::AIFF;
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| 15 |
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| 16 | use strict;
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| 17 | use vars qw($VERSION);
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| 18 | use Image::ExifTool qw(:DataAccess :Utils);
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| 19 | use Image::ExifTool::ID3;
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| 20 |
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[34921] | 21 | $VERSION = '1.11';
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[16842] | 22 |
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| 23 | # information for time/date-based tags (time zero is Jan 1, 1904)
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| 24 | my %timeInfo = (
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| 25 | Groups => { 2 => 'Time' },
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| 26 | ValueConv => 'ConvertUnixTime($val - ((66 * 365 + 17) * 24 * 3600))',
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| 27 | PrintConv => '$self->ConvertDateTime($val)',
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| 28 | );
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| 29 |
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| 30 | # AIFF info
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| 31 | %Image::ExifTool::AIFF::Main = (
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| 32 | GROUPS => { 2 => 'Audio' },
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[34921] | 33 | NOTES => q{
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| 34 | Tags extracted from Audio Interchange File Format (AIFF) files. See
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| 35 | L<http://www-mmsp.ece.mcgill.ca/Documents/AudioFormats/AIFF/AIFF.html> for
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| 36 | the AIFF specification.
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| 37 | },
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[16842] | 38 | # FORM => 'Format',
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| 39 | FVER => {
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| 40 | Name => 'FormatVersion',
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| 41 | SubDirectory => { TagTable => 'Image::ExifTool::AIFF::FormatVers' },
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| 42 | },
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| 43 | COMM => {
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| 44 | Name => 'Common',
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| 45 | SubDirectory => { TagTable => 'Image::ExifTool::AIFF::Common' },
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| 46 | },
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| 47 | COMT => {
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| 48 | Name => 'Comment',
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| 49 | SubDirectory => { TagTable => 'Image::ExifTool::AIFF::Comment' },
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| 50 | },
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[34921] | 51 | NAME => {
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| 52 | Name => 'Name',
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| 53 | ValueConv => '$self->Decode($val, "MacRoman")',
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| 54 | },
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| 55 | AUTH => {
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| 56 | Name => 'Author',
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| 57 | Groups => { 2 => 'Author' },
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| 58 | ValueConv => '$self->Decode($val, "MacRoman")',
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| 59 | },
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| 60 | '(c) ' => {
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| 61 | Name => 'Copyright',
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| 62 | Groups => { 2 => 'Author' },
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| 63 | ValueConv => '$self->Decode($val, "MacRoman")',
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| 64 | },
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| 65 | ANNO => {
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| 66 | Name => 'Annotation',
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| 67 | ValueConv => '$self->Decode($val, "MacRoman")',
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| 68 | },
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[16842] | 69 | 'ID3 ' => {
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| 70 | Name => 'ID3',
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| 71 | SubDirectory => {
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| 72 | TagTable => 'Image::ExifTool::ID3::Main',
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| 73 | ProcessProc => \&Image::ExifTool::ID3::ProcessID3,
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| 74 | },
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| 75 | },
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[34921] | 76 | APPL => 'ApplicationData', # (first 4 bytes are the application signature)
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[16842] | 77 | # SSND => 'SoundData',
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| 78 | # MARK => 'Marker',
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| 79 | # INST => 'Instrument',
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| 80 | # MIDI => 'MidiData',
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| 81 | # AESD => 'AudioRecording',
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| 82 | );
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| 83 |
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| 84 | %Image::ExifTool::AIFF::Common = (
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| 85 | PROCESS_PROC => \&Image::ExifTool::ProcessBinaryData,
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| 86 | GROUPS => { 2 => 'Audio' },
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| 87 | FORMAT => 'int16u',
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| 88 | 0 => 'NumChannels',
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| 89 | 1 => { Name => 'NumSampleFrames', Format => 'int32u' },
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| 90 | 3 => 'SampleSize',
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| 91 | 4 => { Name => 'SampleRate', Format => 'extended' }, #3
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| 92 | 9 => {
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| 93 | Name => 'CompressionType',
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| 94 | Format => 'string[4]',
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| 95 | PrintConv => {
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| 96 | NONE => 'None',
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| 97 | ACE2 => 'ACE 2-to-1',
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| 98 | ACE8 => 'ACE 8-to-3',
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| 99 | MAC3 => 'MAC 3-to-1',
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| 100 | MAC6 => 'MAC 6-to-1',
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| 101 | sowt => 'Little-endian, no compression',
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[34921] | 102 | alaw => 'a-law',
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| 103 | ALAW => 'A-law',
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| 104 | ulaw => 'mu-law',
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| 105 | ULAW => 'Mu-law',
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| 106 | 'GSM '=> 'GSM',
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| 107 | G722 => 'G722',
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| 108 | G726 => 'G726',
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| 109 | G728 => 'G728',
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[16842] | 110 | },
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| 111 | },
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[34921] | 112 | 11 => { #PH
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| 113 | Name => 'CompressorName',
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| 114 | Format => 'pstring',
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| 115 | ValueConv => '$self->Decode($val, "MacRoman")',
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| 116 | },
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[16842] | 117 | );
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| 118 |
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| 119 | %Image::ExifTool::AIFF::FormatVers = (
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| 120 | PROCESS_PROC => \&Image::ExifTool::ProcessBinaryData,
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| 121 | FORMAT => 'int32u',
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| 122 | 0 => { Name => 'FormatVersionTime', %timeInfo },
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| 123 | );
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| 124 |
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| 125 | %Image::ExifTool::AIFF::Comment = (
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| 126 | PROCESS_PROC => \&Image::ExifTool::AIFF::ProcessComment,
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| 127 | GROUPS => { 2 => 'Audio' },
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| 128 | 0 => { Name => 'CommentTime', %timeInfo },
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| 129 | 1 => 'MarkerID',
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[34921] | 130 | 2 => {
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| 131 | Name => 'Comment',
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| 132 | ValueConv => '$self->Decode($val, "MacRoman")',
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| 133 | },
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[16842] | 134 | );
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| 135 |
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[34921] | 136 | %Image::ExifTool::AIFF::Composite = (
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| 137 | Duration => {
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| 138 | Require => {
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| 139 | 0 => 'AIFF:SampleRate',
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| 140 | 1 => 'AIFF:NumSampleFrames',
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| 141 | },
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| 142 | RawConv => '($val[0] and $val[1]) ? $val[1] / $val[0] : undef',
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| 143 | PrintConv => 'ConvertDuration($val)',
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| 144 | },
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| 145 | );
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| 146 |
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| 147 | # add our composite tags
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| 148 | Image::ExifTool::AddCompositeTags('Image::ExifTool::AIFF');
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| 149 |
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| 150 |
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[16842] | 151 | #------------------------------------------------------------------------------
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| 152 | # Process AIFF Comment chunk
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| 153 | # Inputs: 0) ExifTool object reference, 1) DirInfo reference, 2) tag table ref
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| 154 | # Returns: 1 on success
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| 155 | sub ProcessComment($$$)
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| 156 | {
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[34921] | 157 | my ($et, $dirInfo, $tagTablePtr) = @_;
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[16842] | 158 | my $dataPt = $$dirInfo{DataPt};
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| 159 | my $dirLen = $$dirInfo{DirLen};
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[34921] | 160 | my $verbose = $et->Options('Verbose');
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[16842] | 161 | return 0 unless $dirLen > 2;
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| 162 | my $numComments = unpack('n',$$dataPt);
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| 163 | my $pos = 2;
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| 164 | my $i;
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[34921] | 165 | $verbose and $et->VerboseDir('Comment', $numComments);
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[16842] | 166 | for ($i=0; $i<$numComments; ++$i) {
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| 167 | last if $pos + 8 > $dirLen;
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| 168 | my ($time, $markerID, $size) = unpack("x${pos}Nnn", $$dataPt);
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[34921] | 169 | $et->HandleTag($tagTablePtr, 0, $time);
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| 170 | $et->HandleTag($tagTablePtr, 1, $markerID) if $markerID;
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[16842] | 171 | $pos += 8;
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| 172 | last if $pos + $size > $dirLen;
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| 173 | my $val = substr($$dataPt, $pos, $size);
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[34921] | 174 | $et->HandleTag($tagTablePtr, 2, $val);
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[16842] | 175 | ++$size if $size & 0x01; # account for padding byte if necessary
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| 176 | $pos += $size;
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| 177 | }
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| 178 | }
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| 179 |
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| 180 | #------------------------------------------------------------------------------
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| 181 | # Extract information from a AIFF file
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| 182 | # Inputs: 0) ExifTool object reference, 1) DirInfo reference
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| 183 | # Returns: 1 on success, 0 if this wasn't a valid AIFF file
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| 184 | sub ProcessAIFF($$)
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| 185 | {
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[34921] | 186 | my ($et, $dirInfo) = @_;
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[16842] | 187 | my $raf = $$dirInfo{RAF};
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[34921] | 188 | my ($buff, $err, $tagTablePtr, $page, $type, $n);
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[16842] | 189 |
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| 190 | # verify this is a valid AIFF file
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| 191 | return 0 unless $raf->Read($buff, 12) == 12;
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[34921] | 192 | my $fast3 = $$et{OPTIONS}{FastScan} && $$et{OPTIONS}{FastScan} == 3;
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[24107] | 193 | my $pos = 12;
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| 194 | # check for DjVu image
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| 195 | if ($buff =~ /^AT&TFORM/) {
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| 196 | # http://www.djvu.org/
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| 197 | # http://djvu.sourceforge.net/specs/djvu3changes.txt
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| 198 | my $buf2;
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| 199 | return 0 unless $raf->Read($buf2, 4) == 4 and $buf2 =~ /^(DJVU|DJVM)/;
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| 200 | $pos += 4;
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| 201 | $buff = substr($buff, 4) . $buf2;
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[34921] | 202 | $et->SetFileType('DJVU');
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| 203 | return 1 if $fast3;
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[24107] | 204 | $tagTablePtr = GetTagTable('Image::ExifTool::DjVu::Main');
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[34921] | 205 | # modify FileType to indicate a multi-page document
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| 206 | $$et{VALUE}{FileType} .= " (multi-page)" if $buf2 eq 'DJVM';
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[24107] | 207 | $type = 'DjVu';
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| 208 | } else {
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| 209 | return 0 unless $buff =~ /^FORM....(AIF(F|C))/s;
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[34921] | 210 | $et->SetFileType($1);
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| 211 | return 1 if $fast3;
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[24107] | 212 | $tagTablePtr = GetTagTable('Image::ExifTool::AIFF::Main');
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| 213 | $type = 'AIFF';
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| 214 | }
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[16842] | 215 | SetByteOrder('MM');
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[34921] | 216 | my $verbose = $et->Options('Verbose');
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[16842] | 217 | #
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[24107] | 218 | # Read through the IFF chunks
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[16842] | 219 | #
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[34921] | 220 | for ($n=0;;++$n) {
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[16842] | 221 | $raf->Read($buff, 8) == 8 or last;
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| 222 | $pos += 8;
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| 223 | my ($tag, $len) = unpack('a4N', $buff);
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[34921] | 224 | my $tagInfo = $et->GetTagInfo($tagTablePtr, $tag);
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| 225 | $et->VPrint(0, "AIFF '${tag}' chunk ($len bytes of data): ", $raf->Tell(),"\n");
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[16842] | 226 | # AIFF chunks are padded to an even number of bytes
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| 227 | my $len2 = $len + ($len & 0x01);
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[34921] | 228 | if ($len2 > 100000000) {
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| 229 | if ($len2 >= 0x80000000 and not $et->Options('LargeFileSupport')) {
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| 230 | $et->Warn('End of processing at large chunk (LargeFileSupport not enabled)');
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| 231 | last;
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| 232 | }
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| 233 | if ($tagInfo) {
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| 234 | $et->Warn("Skipping large $$tagInfo{Name} chunk (> 100 MB)");
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| 235 | undef $tagInfo;
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| 236 | }
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| 237 | }
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[16842] | 238 | if ($tagInfo) {
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[24107] | 239 | if ($$tagInfo{TypeOnly}) {
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| 240 | $len = $len2 = 4;
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| 241 | $page = ($page || 0) + 1;
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[34921] | 242 | $et->VPrint(0, $$et{INDENT} . "Page $page:\n");
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[24107] | 243 | }
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| 244 | $raf->Read($buff, $len2) >= $len or $err=1, last;
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| 245 | unless ($$tagInfo{SubDirectory} or $$tagInfo{Binary}) {
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| 246 | $buff =~ s/\0+$//; # remove trailing nulls
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| 247 | }
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[34921] | 248 | $et->HandleTag($tagTablePtr, $tag, $buff,
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[16842] | 249 | DataPt => \$buff,
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| 250 | DataPos => $pos,
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| 251 | Start => 0,
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| 252 | Size => $len,
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| 253 | );
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[34921] | 254 | } elsif (not $len) {
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| 255 | next if ++$n < 100;
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| 256 | $et->Warn('Aborting scan. Too many empty chunks');
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| 257 | last;
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| 258 | } elsif ($verbose > 2 and $len2 < 1024000) {
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| 259 | $raf->Read($buff, $len2) == $len2 or $err = 1, last;
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| 260 | $et->VerboseDump(\$buff);
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[16842] | 261 | } else {
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| 262 | $raf->Seek($len2, 1) or $err=1, last;
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| 263 | }
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| 264 | $pos += $len2;
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[34921] | 265 | $n = 0;
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[16842] | 266 | }
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[34921] | 267 | $err and $et->Warn("Error reading $type file (corrupted?)");
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[16842] | 268 | return 1;
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| 269 | }
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| 270 |
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| 271 | 1; # end
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| 272 |
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| 273 | __END__
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| 274 |
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| 275 | =head1 NAME
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| 276 |
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| 277 | Image::ExifTool::AIFF - Read AIFF meta information
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| 278 |
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| 279 | =head1 SYNOPSIS
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| 280 |
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| 281 | This module is used by Image::ExifTool
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| 282 |
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| 283 | =head1 DESCRIPTION
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| 284 |
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| 285 | This module contains routines required by Image::ExifTool to extract
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| 286 | information from AIFF (Audio Interchange File Format) audio files.
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| 287 |
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| 288 | =head1 AUTHOR
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| 289 |
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[34921] | 290 | Copyright 2003-2021, Phil Harvey (philharvey66 at gmail.com)
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[16842] | 291 |
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| 292 | This library is free software; you can redistribute it and/or modify it
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| 293 | under the same terms as Perl itself.
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| 294 |
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| 295 | =head1 REFERENCES
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| 296 |
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| 297 | =over 4
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| 298 |
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| 299 | =item L<http://developer.apple.com/documentation/QuickTime/INMAC/SOUND/imsoundmgr.30.htm#pgfId=3190>
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| 300 |
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| 301 | =item L<http://astronomy.swin.edu.au/~pbourke/dataformats/aiff/>
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| 302 |
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| 303 | =item L<http://www.mactech.com/articles/mactech/Vol.06/06.01/SANENormalized/>
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| 304 |
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| 305 | =back
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| 306 |
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| 307 | =head1 SEE ALSO
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| 308 |
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| 309 | L<Image::ExifTool::TagNames/AIFF Tags>,
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| 310 | L<Image::ExifTool(3pm)|Image::ExifTool>
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| 311 |
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| 312 | =cut
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