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|
#!/usr/bin/env ruby
#
# omptagger
# http://github.com/omp/omptagger
# Modify and display metadata of audio files.
#
# Copyright 2007-2010 David Vazgenovich Shakaryan <dvshakaryan@gmail.com>
# Distributed under the terms of the GNU General Public License v3.
# See http://www.gnu.org/licenses/gpl.txt for the full license text.
require 'getoptlong'
require 'rubygems'
require 'filemagic'
require 'TagLib'
class Hash
def longest_key_length
self.keys.inject(0) do |longest, key|
key.length > longest ? key.length : longest
end
end
end
class Metadata
def output(tag, val, padding = 0)
puts ' ' + tag + ' ' * (2 + padding) + val
end
private :output
def view
puts ' Viewing tags:'
if @tags.empty?
puts ' No tags set.'
return true
end
end
def viewtag(tag)
puts ' Viewing ' + tag + ' tag:'
unless @tags.has_key? tag
puts ' Tag not set.'
return true
end
end
end
class VorbisComment < Metadata
def view
return if super
@tags.sort.each do |tag, val|
val.each do |val|
output(tag, val, @tags.longest_key_length - tag.length)
end
end
end
def viewtag(tag)
return if super
@tags[tag].each do |val|
output(tag, val)
end
end
end
class FLAC < VorbisComment
def initialize(file)
@filename = File.expand_path(file)
@write = false
@file = TagLib::FLAC::File.new(file)
@tags = @file.xiphComment.fieldListMap.hash
end
end
def help
puts <<-end
Usage: omptagger [options] [files]
Options:
--view -v View all tags
--view-tag -t View a tag
--add-tag -a Add a tag
--set-tag -s Set a tag
--remove -r Remove all tags
--remove-tag -d Remove a tag
--generate -g Generate tags based on filename
--rename -m Generate filename based on tags
--scheme -n Specify a file naming scheme
--list -l Display available scheme keys
--help -h Display help information
--pretend -p Do not finalise changes
Notes:
* Actions are executed in the order they are specified.
* The default file naming scheme is Artist - Title.
end
exit
end
def list
puts <<-end
Keys Vorbis Comments ID3v2 Frames
---- --------------- -------------
%a Artist Artist
%b Album Album
%d Date Year
%n TrackNumber Track
%t Title Title
---- --------------- -------------
%* Wildcard Wildcard
%% Per cent sign Per cent sign
end
exit
end
actions = Array.new
options = Array.new
scheme = '%a - %t'
GetoptLong.new(
['--view', '-v', GetoptLong::NO_ARGUMENT],
['--view-tag', '-t', GetoptLong::REQUIRED_ARGUMENT],
['--set-tag', '-s', GetoptLong::REQUIRED_ARGUMENT],
['--remove', '-r', GetoptLong::NO_ARGUMENT],
['--remove-tag', '-d', GetoptLong::REQUIRED_ARGUMENT],
['--generate', '-g', GetoptLong::NO_ARGUMENT],
['--rename', '-m', GetoptLong::NO_ARGUMENT],
['--scheme', '-n', GetoptLong::REQUIRED_ARGUMENT],
['--pretend', '-p', GetoptLong::NO_ARGUMENT],
['--list', '-l', GetoptLong::NO_ARGUMENT],
['--help', '-h', GetoptLong::NO_ARGUMENT]
).each do |option, argument|
option = option.delete('-').intern
case option
when :scheme
scheme = argument
when :help, :list, :pretend
options << option
when :viewtag, :settag, :removetag
actions << [option, argument]
when :generate, :rename
actions << [option, scheme]
else
actions << [option]
end
end
help if options.include?(:help)
list if options.include?(:list)
help if actions.empty?
if ARGV.empty?
puts 'No files specified.'
exit
end
mime = FileMagic.mime
mime.simplified = true
ARGV.each do |file|
begin
raise 'File does not exist.' unless File.exist?(file)
case mime.file(file)
when 'audio/x-flac'
track = FLAC.new(file)
else
raise 'File extension not recognised.'
end
puts file + ':'
actions.each do |action|
track.send(*action)
end
rescue RuntimeError => message
$stderr.puts file + ':'
$stderr.puts ' ' + message
end
end
|
