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Man Pages


Manual Reference Pages  -  MP3::FIND::BASE (3)

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NAME

MP3::Find::Base - Base class for MP3::Find backends

CONTENTS

SYNOPSIS



    package MyFinder;
    use base MP3::Find::Base;
   
    sub search {
        my $self = shift;
        my ($query, $dirs, $sort, $options) = @_;
       
        # do something to find and sort the mp3s...
        my @results = do_something(...);
       
        return @results;
    }
   
    package main;
    my $finder = MyFinder->new;
   
    # see MP3::Find for details about %options
    print "$_\n" foreach $finder->find_mp3s(\%options);



DESCRIPTION

This is the base class for the classes that actually do the searching and sorting for MP3::Find.

METHODS

    new

Really simple constructor. If you pass it a hash of options, it will hang on to them for you.

    search

This is the one you should override in your subclass. If you don’t, the base class search method will croak.

The search method is called by the find_mp3s method with the following arguments: the finder object, a hashref of query parameters, an arrayref of directories to search, and a hashref of miscellaneous options.

The search method should return a list of hashrefs representing the results of the search. Each hashref should have the following keys (all except FILENAME are derived from the keys returned by the get_mp3tag and get_mp3Info functions from MP3::Info):



    FILENAME
   
    TITLE
    ARTIST
    ALBUM
    YEAR
    COMMENT
    GENRE
    TRACKNUM
   
    VERSION         -- MPEG audio version (1, 2, 2.5)
    LAYER           -- MPEG layer description (1, 2, 3)
    STEREO          -- boolean for audio is in stereo
   
    VBR             -- boolean for variable bitrate
    BITRATE         -- bitrate in kbps (average for VBR files)
    FREQUENCY       -- frequency in kHz
    SIZE            -- bytes in audio stream
    OFFSET          -- bytes offset that stream begins
   
    SECS            -- total seconds
    MM              -- minutes
    SS              -- leftover seconds
    MS              -- leftover milliseconds
    TIME            -- time in MM:SS
   
    COPYRIGHT       -- boolean for audio is copyrighted
    PADDING         -- boolean for MP3 frames are padded
    MODE            -- channel mode (0 = stereo, 1 = joint stereo,
                    -- 2 = dual channel, 3 = single channel)
    FRAMES          -- approximate number of frames
    FRAME_LENGTH    -- approximate length of a frame
    VBR_SCALE       -- VBR scale from VBR header



    find_mp3s

The method that should be called by the program doing the searching.

See MP3::Find for an explanation of the options that can be passed to find_mp3s.

TODO

More format codes? Possibly look into using String::Format

SEE ALSO

MP3::Find, MP3::Find::Filesystem, MP3::Find::DB

See MP3::Info for more information about the fields you can search and sort on.

AUTHOR

Peter Eichman <peichman@cpan.org>

COPYRIGHT AND LICENSE

Copyright (c) 2006 by Peter Eichman. All rights reserved.

This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

Search for    or go to Top of page |  Section 3 |  Main Index


perl v5.20.3 MP3::FIND::BASE (3) 2011-06-08

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