NAME
Music::Lyrics::LRC - Manipulate LRC karaoke timed lyrics files
VERSION
Version 0.10
DESCRIPTION
Read, write, and do simple manipulations of the LRC lyrics files used for some karaoke devices.
For details on the LRC file format, please see Wikipedia:
https://en.wikipedia.org/wiki/LRC_(file_format)
SYNOPSIS
use Music::Lyrics::LRC;
...
my $lrc = Music::Lyrics::LRC->new();
open my $rfh, '<', 'mylyrics.lrc';
$lrc->load($rfh);
...
my $lyrics = $lrc->lyrics(); # arrayref of hashrefs: time (msec), text
my $tags = $lrc->tags(); # hashref, name => value
...
$lrc->add_lyric(5500, q(Now I'm singin' at exactly 5.5 seconds...));
$lrc->set_tag('author', 'Justin A. Perlhacker');
$lrc->unset_tag('author');
...
open my $wfh, '>', 'savelyrics.lrc';
$lrc->save($wfh);SUBROUTINES/METHODS
new(%opts)
Constructor method. Accepts a hash with one attribute verbose. This specifies whether the module will warn explicitly when it cannot parse an input line from a file. It defaults to 0.
my $lrc = MRC::Lyrics::LRC->new();
...
my $lrc_verbose = MRC::Lyrics::LRC->new(verbose => 1);
...lyrics()
Retrieve an arrayref of hashrefs representing lyric lines, sorted by time ascending. Each one has time and text keys. The time is in milliseconds.
[
{
time => 5500,
text => 'Now I\'m singin\' at exactly 5.5 seconds...',
},
{
time => 6001,
text => 'And now a moment after the sixth...',
},
...
]tags()
Retrieve a hashref of tag names to tag values for this lyrics file.
{
ar => 'Justin A. Perlhacker',
ti => 'Perl timekeeping blues',
...
}add_lyric($time, $text)
Add a lyric at the given non-negative time in milliseconds and with the given text. The text must not include newlines or carriage returns.
set_tag($name, $value)
Set a tag with the given name and value. The name must be at least one character and cannot have colons. Neither the name nor the value can include newlines or carriage returns.
unset_tag($name)
Clear a tag with the given name. Raises a warning if the tag has not been set.
load($fh)
Load lyrics from the given readable filehandle.
save($fh)
Save lyrics to the given writeable filehandle.
DIAGNOSTICS
Bad lyric time-
A lyric could not be added with the given time. It may have been negative.
Bad lyric line-
The line you tried to add had illegal characters in it, probably a carriage return or a newline.
Bad tag name-
The tag you tried to set had an illegal name. It needs to be at least one character, and can't include colons or whitespace.
Bad tag value-
You tried to set a tag to an illegal value. The value probably had a carriage return or a newline in it.
Tag not set-
You tried to clear a tag that had not already been set.
Unknown format for line %s-
The parser ran across a line in the LRC file that it could not understand. It tolerates blank lines, tags, and lyric lines, and doesn't know anything else.
Failed file read: %s-
The file read failed with the given system error.
Not a filehandle-
You passed
load()orsave()something that wasn't a filehandle. Failed tag write: %s-
An attempt to write a tag to the output filehandle in
save()failed with the given system error. Failed lyric write: %s-
An attempt to write a lyric timestamp and line to the output filehandle in
save()failed with the given system error.
CONFIGURATION AND ENVIRONMENT
You'll need to make sure that you're passing in a filehandle with the appropriate I/O layers you want, especially encoding.
DEPENDENCIES
INCOMPATIBILITIES
This module does not support any "extended" or "enhanced" LRC format; in particular, at the time of writing it can't handle per-word times syntax. This may change in future revisions.
BUGS AND LIMITATIONS
The format accepted here is very liberal, and needs to be tested with lots of different LRC files from the wild.
Fractional seconds of any length can be parsed, and preserved in the millisecond count return by lyrics(), but any resolution beyond 2 decimal places is lost on save().
The test suite is skeletal, and needs a lot of fleshing out.
AUTHOR
Tom Ryder <tom@sanctum.geek.nz>
LICENSE AND COPYRIGHT
Copyright (C) 2017 Tom Ryder
This program is free software; you can redistribute it and/or modify it under the terms of the Artistic License (2.0). You may obtain a copy of the full license at:
http://www.perlfoundation.org/artistic_license_2_0
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