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test_pie/external/exiftool/lib/Image/ExifTool/AIFF.pm

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#------------------------------------------------------------------------------
# File: AIFF.pm
#
# Description: Read AIFF meta information
#
# Revisions: 01/06/2006 - P. Harvey Created
# 09/22/2008 - PH Added DjVu support
#
# References: 1) http://developer.apple.com/documentation/QuickTime/INMAC/SOUND/imsoundmgr.30.htm#pgfId=3190
# 2) http://astronomy.swin.edu.au/~pbourke/dataformats/aiff/
# 3) http://www.mactech.com/articles/mactech/Vol.06/06.01/SANENormalized/
#------------------------------------------------------------------------------
package Image::ExifTool::AIFF;
use strict;
use vars qw($VERSION);
use Image::ExifTool qw(:DataAccess :Utils);
use Image::ExifTool::ID3;
$VERSION = '1.09';
# information for time/date-based tags (time zero is Jan 1, 1904)
my %timeInfo = (
Groups => { 2 => 'Time' },
ValueConv => 'ConvertUnixTime($val - ((66 * 365 + 17) * 24 * 3600))',
PrintConv => '$self->ConvertDateTime($val)',
);
# AIFF info
%Image::ExifTool::AIFF::Main = (
GROUPS => { 2 => 'Audio' },
NOTES => q{
Tags extracted from Audio Interchange File Format (AIFF) files. See
L<http://www-mmsp.ece.mcgill.ca/Documents/AudioFormats/AIFF/AIFF.html> for
the AIFF specification.
},
# FORM => 'Format',
FVER => {
Name => 'FormatVersion',
SubDirectory => { TagTable => 'Image::ExifTool::AIFF::FormatVers' },
},
COMM => {
Name => 'Common',
SubDirectory => { TagTable => 'Image::ExifTool::AIFF::Common' },
},
COMT => {
Name => 'Comment',
SubDirectory => { TagTable => 'Image::ExifTool::AIFF::Comment' },
},
NAME => {
Name => 'Name',
ValueConv => '$self->Decode($val, "MacRoman")',
},
AUTH => {
Name => 'Author',
Groups => { 2 => 'Author' },
ValueConv => '$self->Decode($val, "MacRoman")',
},
'(c) ' => {
Name => 'Copyright',
Groups => { 2 => 'Author' },
ValueConv => '$self->Decode($val, "MacRoman")',
},
ANNO => {
Name => 'Annotation',
ValueConv => '$self->Decode($val, "MacRoman")',
},
'ID3 ' => {
Name => 'ID3',
SubDirectory => {
TagTable => 'Image::ExifTool::ID3::Main',
ProcessProc => \&Image::ExifTool::ID3::ProcessID3,
},
},
# SSND => 'SoundData',
# MARK => 'Marker',
# INST => 'Instrument',
# MIDI => 'MidiData',
# AESD => 'AudioRecording',
# APPL => 'ApplicationSpecific',
);
%Image::ExifTool::AIFF::Common = (
PROCESS_PROC => \&Image::ExifTool::ProcessBinaryData,
GROUPS => { 2 => 'Audio' },
FORMAT => 'int16u',
0 => 'NumChannels',
1 => { Name => 'NumSampleFrames', Format => 'int32u' },
3 => 'SampleSize',
4 => { Name => 'SampleRate', Format => 'extended' }, #3
9 => {
Name => 'CompressionType',
Format => 'string[4]',
PrintConv => {
NONE => 'None',
ACE2 => 'ACE 2-to-1',
ACE8 => 'ACE 8-to-3',
MAC3 => 'MAC 3-to-1',
MAC6 => 'MAC 6-to-1',
sowt => 'Little-endian, no compression',
alaw => 'a-law',
ALAW => 'A-law',
ulaw => 'mu-law',
ULAW => 'Mu-law',
'GSM '=> 'GSM',
G722 => 'G722',
G726 => 'G726',
G728 => 'G728',
},
},
11 => { #PH
Name => 'CompressorName',
Format => 'pstring',
ValueConv => '$self->Decode($val, "MacRoman")',
},
);
%Image::ExifTool::AIFF::FormatVers = (
PROCESS_PROC => \&Image::ExifTool::ProcessBinaryData,
FORMAT => 'int32u',
0 => { Name => 'FormatVersionTime', %timeInfo },
);
%Image::ExifTool::AIFF::Comment = (
PROCESS_PROC => \&Image::ExifTool::AIFF::ProcessComment,
GROUPS => { 2 => 'Audio' },
0 => { Name => 'CommentTime', %timeInfo },
1 => 'MarkerID',
2 => {
Name => 'Comment',
ValueConv => '$self->Decode($val, "MacRoman")',
},
);
%Image::ExifTool::AIFF::Composite = (
Duration => {
Require => {
0 => 'AIFF:SampleRate',
1 => 'AIFF:NumSampleFrames',
},
RawConv => '($val[0] and $val[1]) ? $val[1] / $val[0] : undef',
PrintConv => 'ConvertDuration($val)',
},
);
# add our composite tags
Image::ExifTool::AddCompositeTags('Image::ExifTool::AIFF');
#------------------------------------------------------------------------------
# Process AIFF Comment chunk
# Inputs: 0) ExifTool object reference, 1) DirInfo reference, 2) tag table ref
# Returns: 1 on success
sub ProcessComment($$$)
{
my ($et, $dirInfo, $tagTablePtr) = @_;
my $dataPt = $$dirInfo{DataPt};
my $dirLen = $$dirInfo{DirLen};
my $verbose = $et->Options('Verbose');
return 0 unless $dirLen > 2;
my $numComments = unpack('n',$$dataPt);
my $pos = 2;
my $i;
$verbose and $et->VerboseDir('Comment', $numComments);
for ($i=0; $i<$numComments; ++$i) {
last if $pos + 8 > $dirLen;
my ($time, $markerID, $size) = unpack("x${pos}Nnn", $$dataPt);
$et->HandleTag($tagTablePtr, 0, $time);
$et->HandleTag($tagTablePtr, 1, $markerID) if $markerID;
$pos += 8;
last if $pos + $size > $dirLen;
my $val = substr($$dataPt, $pos, $size);
$et->HandleTag($tagTablePtr, 2, $val);
++$size if $size & 0x01; # account for padding byte if necessary
$pos += $size;
}
}
#------------------------------------------------------------------------------
# Extract information from a AIFF file
# Inputs: 0) ExifTool object reference, 1) DirInfo reference
# Returns: 1 on success, 0 if this wasn't a valid AIFF file
sub ProcessAIFF($$)
{
my ($et, $dirInfo) = @_;
my $raf = $$dirInfo{RAF};
my ($buff, $err, $tagTablePtr, $page, $type);
# verify this is a valid AIFF file
return 0 unless $raf->Read($buff, 12) == 12;
my $fast3 = $$et{OPTIONS}{FastScan} && $$et{OPTIONS}{FastScan} == 3;
my $pos = 12;
# check for DjVu image
if ($buff =~ /^AT&TFORM/) {
# http://www.djvu.org/
# http://djvu.sourceforge.net/specs/djvu3changes.txt
my $buf2;
return 0 unless $raf->Read($buf2, 4) == 4 and $buf2 =~ /^(DJVU|DJVM)/;
$pos += 4;
$buff = substr($buff, 4) . $buf2;
$et->SetFileType('DJVU');
return 1 if $fast3;
$tagTablePtr = GetTagTable('Image::ExifTool::DjVu::Main');
# modifiy FileType to indicate a multi-page document
$$et{VALUE}{FileType} .= " (multi-page)" if $buf2 eq 'DJVM';
$type = 'DjVu';
} else {
return 0 unless $buff =~ /^FORM....(AIF(F|C))/s;
$et->SetFileType($1);
return 1 if $fast3;
$tagTablePtr = GetTagTable('Image::ExifTool::AIFF::Main');
$type = 'AIFF';
}
SetByteOrder('MM');
my $verbose = $et->Options('Verbose');
#
# Read through the IFF chunks
#
for (;;) {
$raf->Read($buff, 8) == 8 or last;
$pos += 8;
my ($tag, $len) = unpack('a4N', $buff);
my $tagInfo = $et->GetTagInfo($tagTablePtr, $tag);
$et->VPrint(0, "AIFF '${tag}' chunk ($len bytes of data):\n");
# AIFF chunks are padded to an even number of bytes
my $len2 = $len + ($len & 0x01);
if ($tagInfo) {
if ($$tagInfo{TypeOnly}) {
$len = $len2 = 4;
$page = ($page || 0) + 1;
$et->VPrint(0, $$et{INDENT} . "Page $page:\n");
}
$raf->Read($buff, $len2) >= $len or $err=1, last;
unless ($$tagInfo{SubDirectory} or $$tagInfo{Binary}) {
$buff =~ s/\0+$//; # remove trailing nulls
}
$et->HandleTag($tagTablePtr, $tag, $buff,
DataPt => \$buff,
DataPos => $pos,
Start => 0,
Size => $len,
);
} elsif ($verbose > 2 and $len2 < 1024000) {
$raf->Read($buff, $len2) == $len2 or $err = 1, last;
$et->VerboseDump(\$buff);
} else {
$raf->Seek($len2, 1) or $err=1, last;
}
$pos += $len2;
}
$err and $et->Warn("Error reading $type file (corrupted?)");
return 1;
}
1; # end
__END__
=head1 NAME
Image::ExifTool::AIFF - Read AIFF meta information
=head1 SYNOPSIS
This module is used by Image::ExifTool
=head1 DESCRIPTION
This module contains routines required by Image::ExifTool to extract
information from AIFF (Audio Interchange File Format) audio files.
=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 REFERENCES
=over 4
=item L<http://developer.apple.com/documentation/QuickTime/INMAC/SOUND/imsoundmgr.30.htm#pgfId=3190>
=item L<http://astronomy.swin.edu.au/~pbourke/dataformats/aiff/>
=item L<http://www.mactech.com/articles/mactech/Vol.06/06.01/SANENormalized/>
=back
=head1 SEE ALSO
L<Image::ExifTool::TagNames/AIFF Tags>,
L<Image::ExifTool(3pm)|Image::ExifTool>
=cut
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