This file is indexed.

/usr/share/perl5/Image/ExifTool/Audible.pm is in libimage-exiftool-perl 10.10-1.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
#------------------------------------------------------------------------------
# File:         Audible.pm
#
# Description:  Read metadata from Audible audio books
#
# Revisions:    2015/04/05 - P. Harvey Created
#
# References:   1) https://github.com/jteeuwen/audible
#               2) https://code.google.com/p/pyaudibletags/
#               3) http://wiki.multimedia.cx/index.php?title=Audible_Audio
#------------------------------------------------------------------------------

package Image::ExifTool::Audible;

use strict;
use vars qw($VERSION);
use Image::ExifTool qw(:DataAccess :Utils);

$VERSION = '1.02';

sub ProcessAudible_meta($$$);
sub ProcessAudible_cvrx($$$);

%Image::ExifTool::Audible::Main = (
    GROUPS => { 2 => 'Audio' },
    NOTES => q{
        ExifTool will extract any information found in the metadata dictionary of
        Audible .AA files, even if not listed in the table below.
    },
    # tags found in the metadata dictionary (chunk 2)
    pubdate    => { Name => 'PublishDate', Groups => { 2 => 'Time' } },
    pub_date_start => { Name => 'PublishDateStart', Groups => { 2 => 'Time' } },
    author     => { Name => 'Author',      Groups => { 2 => 'Author' } },
    copyright  => { Name => 'Copyright',   Groups => { 2 => 'Author' } },
    # also seen (ref PH):
    # product_id, parent_id, title, provider, narrator, price, description,
    # long_description, short_title, is_aggregation, title_id, codec, HeaderSeed,
    # EncryptedBlocks, HeaderKey, license_list, CPUType, license_count, <12 hex digits>,
    # parent_short_title, parent_title, aggregation_id, short_description, user_alias

    # information extracted from other chunks
    _chapter_count => { Name => 'ChapterCount' },       # from chunk 6
    _cover_art => { # from chunk 11
        Name => 'CoverArt',
        Groups => { 2 => 'Preview' },
        Binary => 1,
    },
);

# 'tags' atoms observed in Audible .m4b audio books (ref PH)
%Image::ExifTool::Audible::tags = (
    GROUPS => { 0 => 'QuickTime', 2 => 'Audio' },
    NOTES => 'Information found in "tags" atom of Audible M4B audio books.',
    meta => {
        Name => 'Audible_meta',
        SubDirectory => { TagTable => 'Image::ExifTool::Audible::meta' },
    },
    cvrx => {
        Name => 'Audible_cvrx',
        SubDirectory => { TagTable => 'Image::ExifTool::Audible::cvrx' },
    },
    tseg => {
        Name => 'Audible_tseg',
        SubDirectory => { TagTable => 'Image::ExifTool::Audible::tseg' },
    },
);

# 'meta' information observed in Audible .m4b audio books (ref PH)
%Image::ExifTool::Audible::meta = (
    PROCESS_PROC => \&ProcessAudible_meta,
    GROUPS => { 0 => 'QuickTime', 2 => 'Audio' },
    NOTES => 'Information found in Audible M4B "meta" atom.',
    Album       => 'Album',
    ALBUMARTIST => { Name => 'AlbumArtist', Groups => { 2 => 'Author' } },
    Artist      => { Name => 'Artist',      Groups => { 2 => 'Author' } },
    Comment     => 'Comment',
    Genre       => 'Genre',
    itunesmediatype => { Name => 'iTunesMediaType', Description => 'iTunes Media Type' },
    SUBTITLE    => 'Subtitle',
    Title       => 'Title',
    TOOL        => 'CreatorTool',
    Year        => { Name => 'Year', Groups => { 2 => 'Time' } },
    track       => 'ChapterName', # (found in 'meta' of 'tseg' atom)
);

# 'cvrx' information observed in Audible .m4b audio books (ref PH)
%Image::ExifTool::Audible::cvrx = (
    PROCESS_PROC => \&ProcessAudible_cvrx,
    GROUPS => { 0 => 'QuickTime', 2 => 'Audio' },
    NOTES => 'Audible cover art information in M4B audio books.',
    VARS => { NO_ID => 1 },
    CoverArtType => 'CoverArtType',
    CoverArt     => {
        Name => 'CoverArt',
        Groups => { 2 => 'Preview' },
        Binary => 1,
    },
);

# 'tseg' information observed in Audible .m4b audio books (ref PH)
%Image::ExifTool::Audible::tseg = (
    GROUPS => { 0 => 'QuickTime', 2 => 'Audio' },
    tshd => {
        Name => 'ChapterNumber',
        Format => 'int32u',
        ValueConv => '$val + 1',    # start counting from 1
    },
    meta => {
        Name => 'Audible_meta2',
        SubDirectory => { TagTable => 'Image::ExifTool::Audible::meta' },
    },
);

#------------------------------------------------------------------------------
# Process Audible 'meta' tags from M4B files (ref PH)
# Inputs: 0) ExifTool object ref, 1) dirInfo ref, 2) tag table ref
# Returns: 1 on success
sub ProcessAudible_meta($$$)
{
    my ($et, $dirInfo, $tagTablePtr) = @_;
    my $dataPt = $$dirInfo{DataPt};
    my $dataPos = $$dirInfo{DataPos};
    my $dirLen = length $$dataPt;
    return 0 if $dirLen < 4;
    my $num = Get32u($dataPt, 0);
    $et->VerboseDir('Audible_meta', $num);
    my $pos = 4;
    my $index;
    for ($index=0; $index<$num; ++$index) {
        last if $pos + 3 > $dirLen;
        my $unk = Get8u($dataPt, $pos);             # ? (0x80 or 0x00)
        last unless $unk eq 0x80 or $unk eq 0x00;
        my $len = Get16u($dataPt, $pos + 1);        # tag length
        $pos += 3;
        last if $pos + $len + 6 > $dirLen or not $len;
        my $tag = substr($$dataPt, $pos, $len);     # tag ID
        my $ver = Get16u($dataPt, $pos + $len);     # version?
        last unless $ver eq 0x0001;
        my $size = Get32u($dataPt, $pos + $len + 2);# data size
        $pos += $len + 6;
        last if $pos + $size > $dirLen;
        my $val = $et->Decode(substr($$dataPt, $pos, $size), 'UTF8');
        unless ($$tagTablePtr{$tag}) {
            my $name = Image::ExifTool::MakeTagName(($tag =~ /[a-z]/) ? $tag : lc($tag));
            AddTagToTable($tagTablePtr, $tag, { Name => $name });
        }
        $et->HandleTag($tagTablePtr, $tag, $val,
            DataPt  => $dataPt,
            DataPos => $dataPos,
            Start   => $pos,
            Size    => $size,
            Index   => $index,
        );
        $pos += $size;
    }
    return 1;
}

#------------------------------------------------------------------------------
# Process Audible 'cvrx' cover art atom from M4B files (ref PH)
# Inputs: 0) ExifTool object ref, 1) dirInfo ref, 2) tag table ref
# Returns: 1 on success
sub ProcessAudible_cvrx($$$)
{
    my ($et, $dirInfo, $tagTablePtr) = @_;
    my $dataPt = $$dirInfo{DataPt};
    my $dataPos = $$dirInfo{DataPos};
    my $dirLen = length $$dataPt;
    return 0 if 0x0a > $dirLen;
    my $len = Get16u($dataPt, 0x08);
    return 0 if 0x0a + $len + 6 > $dirLen;
    my $size = Get32u($dataPt, 0x0a + $len + 2);
    return 0 if 0x0a + $len + 6 + $size > $dirLen;
    $et->VerboseDir('Audible_cvrx', undef, $dirLen);
    $et->HandleTag($tagTablePtr, 'CoverArtType', undef,
        DataPt  => $dataPt,
        DataPos => $dataPos,
        Start   => 0x0a,
        Size    => $len,
    );
    $et->HandleTag($tagTablePtr, 'CoverArt', undef,
        DataPt  => $dataPt,
        DataPos => $dataPos,
        Start   => 0x0a + $len + 6,
        Size    => $size,
    );
    return 1;
}

#------------------------------------------------------------------------------
# Read information from an Audible .AA file
# Inputs: 0) ExifTool ref, 1) dirInfo ref
# Returns: 1 on success, 0 if this wasn't a valid AA file
sub ProcessAA($$)
{
    my ($et, $dirInfo) = @_;
    my $raf = $$dirInfo{RAF};
    my ($buff, $toc, $entry, $i);

    # check magic number
    return 0 unless $raf->Read($buff, 16) == 16 and $buff=~/^.{4}\x57\x90\x75\x36/s;
    # check file size
    if (defined $$et{VALUE}{FileSize}) {
        # first 4 bytes of the file should be the filesize
        unpack('N', $buff) == $$et{VALUE}{FileSize} or return 0;
    }
    $et->SetFileType();
    SetByteOrder('MM');
    my $bytes = 12 * Get32u(\$buff, 8); # table of contents size in bytes
    $bytes > 0xc00 and $et->Warn('Invalid TOC'), return 1;
    # read the table of contents
    $raf->Read($toc, $bytes) == $bytes or $et->Warn('Truncated TOC'), return 1;
    my $tagTablePtr = GetTagTable('Image::ExifTool::Audible::Main');
    # parse table of contents (in $toc)
    for ($entry=0; $entry<$bytes; $entry+=12) {
        my $type = Get32u(\$toc, $entry);
        next unless $type == 2 or $type == 6 or $type == 11;
        my $offset = Get32u(\$toc, $entry + 4);
        my $length = Get32u(\$toc, $entry + 8) or next;
        $raf->Seek($offset, 0) or $et->Warn("Chunk $type seek error"), last;
        if ($type == 6) {   # offset table
            next if $length < 4 or $raf->Read($buff, 4) != 4; # only read the chapter count
            $et->HandleTag($tagTablePtr, '_chapter_count', Get32u(\$buff, 0));
            next;
        }
        # read the chunk
        $length > 100000000 and $et->Warn("Chunk $type too big"), next;
        $raf->Read($buff, $length) == $length or $et->Warn("Chunk $type read error"), last;
        if ($type == 11) {  # cover art
            next if $length < 8;
            my $len = Get32u(\$buff, 0);
            my $off = Get32u(\$buff, 4);
            next if $off < $offset + 8 or $off - $offset + $len > $length;
            $et->HandleTag($tagTablePtr, '_cover_art', substr($buff, $off-$offset, $len));
            next;
        }
        # parse metadata dictionary (in $buff)
        $length < 4 and $et->Warn('Bad dictionary'), next;
        my $num = Get32u(\$buff, 0);
        $num > 0x200 and $et->Warn('Bad dictionary count'), next;
        my $pos = 4;    # dictionary starts immediately after count
        require Image::ExifTool::HTML;  # (for UnescapeHTML)
        $et->VerboseDir('Audible Metadata', $num);
        for ($i=0; $i<$num; ++$i) {
            my $tagPos = $pos + 9;                  # position of tag string
            $tagPos > $length and $et->Warn('Truncated dictionary'), last;
            # (1 unknown byte ignored at start of each dictionary entry)
            my $tagLen = Get32u(\$buff, $pos + 1);  # tag string length
            my $valLen = Get32u(\$buff, $pos + 5);  # value string length
            my $valPos = $tagPos + $tagLen;         # position of value string
            my $nxtPos = $valPos + $valLen;         # position of next entry
            $nxtPos > $length and $et->Warn('Bad dictionary entry'), last;
            my $tag = substr($buff, $tagPos, $tagLen);
            my $val = substr($buff, $valPos, $valLen);
            unless ($$tagTablePtr{$tag}) {
                my $name = Image::ExifTool::MakeTagName($tag);
                $name =~ s/_(.)/\U$1/g; # change from underscore-separated to mixed case
                AddTagToTable($tagTablePtr, $tag, { Name => $name });
            }
            # unescape HTML character references and convert from UTF-8
            $val = $et->Decode(Image::ExifTool::HTML::UnescapeHTML($val), 'UTF8');
            $et->HandleTag($tagTablePtr, $tag, $val,
                DataPos => $offset,
                DataPt  => \$buff,
                Start   => $valPos,
                Size    => $valLen,
                Index   => $i,
            );
            $pos = $nxtPos; # step to next dictionary entry
        }
    }
    return 1;
}

1;  # end

__END__

=head1 NAME

Image::ExifTool::Audible - Read meta information from Audible audio books

=head1 SYNOPSIS

This module is used by Image::ExifTool

=head1 DESCRIPTION

This module contains definitions required by Image::ExifTool to read meta
information from Audible audio books.

=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 REFERENCES

=over 4

=item L<https://github.com/jteeuwen/audible>

=item L<https://code.google.com/p/pyaudibletags/>

=item L<http://wiki.multimedia.cx/index.php?title=Audible_Audio>

=back

=head1 SEE ALSO

L<Image::ExifTool::TagNames/Audible Tags>,
L<Image::ExifTool(3pm)|Image::ExifTool>

=cut