| File | % covered | Lines | Relevant Lines | Lines covered | Lines missed | Avg. Hits / Line |
|---|---|---|---|---|---|---|
| lib/discid.rb | 96.77 % | 200 | 31 | 30 | 1 | 9.16 |
| lib/discid/disc.rb | 93.67 % | 231 | 79 | 74 | 5 | 6.22 |
| lib/discid/disc_error.rb | 100.00 % | 21 | 2 | 2 | 0 | 1.00 |
| lib/discid/lib.rb | 78.26 % | 133 | 46 | 36 | 10 | 1.43 |
| lib/discid/track.rb | 100.00 % | 135 | 25 | 25 | 0 | 12.16 |
-
# Copyright (C) 2013-2017, 2019 Philipp Wolfer
-
#
-
# This program is free software: you can redistribute it and/or modify
-
# it under the terms of the GNU Lesser General Public License as published by
-
# the Free Software Foundation, either version 3 of the License, or
-
# (at your option) any later version.
-
#
-
# This program is distributed in the hope that it will be useful,
-
# but WITHOUT ANY WARRANTY; without even the implied warranty of
-
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-
# GNU Lesser General Public License for more details.
-
#
-
# You should have received a copy of the GNU Lesser General Public License
-
# along with this program. If not, see <http://www.gnu.org/licenses/>.
-
-
1
require 'discid/lib'
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1
require 'discid/disc'
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1
require 'discid/version'
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# The DiscId module allows calculating DiscIDs (MusicBrainz and freedb)
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# for Audio CDs. Additionally the library can extract the MCN/UPC/EAN and
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# the ISRCs from disc.
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#
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# The main interface for using this module are the {read} and {put}
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# methods which both return an instance of {Disc}. {read} allows you to
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# read the data from an actual CD drive while {put} allows you to
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# calculate the DiscID for a previously read CD TOC.
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#
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# Depending on the version of libdiscid and the operating system used
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# additional features like reading the MCN or ISRCs from the disc
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# might be available. You can check for supported features with {has_feature?}.
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#
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# @see http://musicbrainz.org/doc/libdiscid#Feature_Matrix
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#
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# @example Read the TOC, MCN and ISRCs
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# require 'discid'
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#
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# device = "/dev/cdrom"
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# disc = DiscId.read(device, :mcn, :isrc)
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#
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# # Print information about the disc:
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# puts "DiscID : #{disc.id}"
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# puts "FreeDB ID : #{disc.freedb_id}"
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# puts "Total length: #{disc.seconds} seconds"
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# puts "MCN : #{disc.mcn}"
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#
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# # Print information about individual tracks:
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# disc.tracks do |track|
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# puts "Track ##{track.number}"
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# puts " Length: %02d:%02d (%i sectors)" %
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# [track.seconds / 60, track.seconds % 60, track.sectors]
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# puts " ISRC : %s" % track.isrc
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# end
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#
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# @example Get the DiscID for an existing TOC
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# require 'discid'
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#
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# first_track = 1
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# sectors = 82255
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# offsets = [150, 16157, 35932, 57527]
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# disc = DiscId.put(first_track, sectors, offsets)
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# puts disc.id # Output: E5VLOkhodzhvsMlK8LSNVioYOgY-
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#
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# @example Check for supported MCN feature
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# disc = DiscId.read(nil, :mcn)
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# puts "MCN: #{disc.mcn}" if DiscId.has_feature?(:mcn)
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1
module DiscId
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-
# Read the disc in the given CD-ROM/DVD-ROM drive extracting only the
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# TOC and additionally specified features.
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#
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# This function reads the disc in the drive specified by the given device
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# identifier. If the device is `nil`, the default device, as returned by
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# {default_device}, is used.
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#
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# This function will always read the TOC, but additional features like `:mcn`
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# and `:isrc` can be set using the features parameter. You can set multiple
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# features.
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#
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# @example Read only the TOC:
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# disc = DiscId.read(device)
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#
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# @example Read the TOC, MCN and ISRCs:
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# disc = DiscId.read(device, :mcn, :isrc)
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#
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# @note libdiscid >= 0.5.0 is required for the feature selection to work.
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# Older versions will allways read MCN and ISRCs when supported. See
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# {http://musicbrainz.org/doc/libdiscid#Feature_Matrix} for a list of
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# supported features by version and platform.
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#
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# @raise [TypeError] `device` can not be converted to a String.
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# @raise [DiscError] Error reading from `device`. `Exception#message` contains
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# error details.
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# @param device [String] The device identifier. If set to `nil` {default_device}
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# will be used.
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# @param features [:mcn, :isrc] List of features to use.
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# `:read` is always implied.
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# @return [Disc]
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1
def self.read(device = nil, *features)
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3
disc = Disc.new
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3
disc.read device, *features
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return disc
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end
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# Provides the TOC of a known CD.
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#
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# This function may be used if the TOC has been read earlier and you want to
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# calculate the disc ID afterwards, without accessing the disc drive.
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#
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# @raise [DiscError] The TOC could not be set. `Exception#message`contains
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# error details.
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# @param first_track [Integer] The number of the first audio track on the
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# disc (usually one).
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# @param sectors [Integer] The total number of sectors on the disc.
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# @param offsets [Array] An array with track offsets (sectors) for each track.
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# @return [Disc]
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1
def self.put(first_track, sectors, offsets)
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10
disc = Disc.new
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10
disc.put first_track, sectors, offsets
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7
return disc
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end
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# Parses a TOC string and returns a [Disc] instance for it.
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#
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# This function can be used if you already have a TOC string like e.g.
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# `1 11 242457 150 44942 61305 72755 96360 130485 147315 164275 190702 205412 220437`
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#
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# @raise [DiscError] The TOC string was invalid and could not be parsed.
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# @param toc [String] A TOC string in the format `1 11 242457 150 44942 61305 72755 96360 130485 147315 164275 190702 205412 220437`.
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# @return [Disc]
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1
def self.parse(toc)
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8
if toc.nil? || toc.empty?
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2
raise DiscError, "Invalid TOC #{toc.inspect}"
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end
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begin
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6
parts = toc.split(' ')
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6
first_track = Integer(parts[0])
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6
sectors = Integer(parts[2])
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29
offsets = parts[3..-1].map{|i| Integer(i)}
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rescue ArgumentError, TypeError => e
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2
raise DiscError, e
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end
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4
return self.put(first_track, sectors, offsets)
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end
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# Return the name of the default disc drive for this operating system.
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#
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# @return [String] An operating system dependent device identifier
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1
def self.default_device
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1
Lib.default_device
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end
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# Check if a certain feature is implemented on the current platform.
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#
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# You can obtain a list of supported features with {feature_list}.
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#
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# @note libdiscid >= 0.5.0 required. Older versions will return `true`
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# for `:read` and `false` for anything else.
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#
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# @param feature [:read, :mcn, :isrc]
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# @return [Boolean] True if the feature is implemented and false if not.
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1
def self.has_feature?(feature)
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4
feature = feature.to_sym if feature.respond_to? :to_sym
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4
return self.feature_list.include? feature
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end
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# A list of features supported by the current platform.
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#
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# Currently the following features are available:
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#
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# * :read
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# * :mcn
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# * :isrc
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#
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# @note libdiscid >= 0.5.0 required. Older versions will return only [:read].
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#
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# @return [Array<Symbol>]
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1
def self.feature_list
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20
return Lib::Features.symbols.select {|f| Lib.has_feature(f) == 1}
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end
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# Converts sectors to seconds.
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#
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# According to the red book standard 75 sectors are one second.
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#
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# @private
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# @param sectors [Integer] Number of sectors
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# @return [Integer] The seconds
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1
def self.sectors_to_seconds(sectors)
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147
return (sectors.to_f / 75).truncate
-
end
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# The libdiscid version.
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#
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# @note This will only give meaningful results for libdiscid 0.4.0
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# and higher. For lower versions this constant will always have
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# the value "libdiscid < 0.4.0".
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1
LIBDISCID_VERSION = Lib.get_version_string
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-
end
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# Copyright (C) 2013-2014, 2021 Philipp Wolfer
-
#
-
# This program is free software: you can redistribute it and/or modify
-
# it under the terms of the GNU Lesser General Public License as published by
-
# the Free Software Foundation, either version 3 of the License, or
-
# (at your option) any later version.
-
#
-
# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
-
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-
# GNU Lesser General Public License for more details.
-
#
-
# You should have received a copy of the GNU Lesser General Public License
-
# along with this program. If not, see <http://www.gnu.org/licenses/>.
-
-
1
require 'ffi'
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1
require 'discid/disc_error'
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1
require 'discid/lib'
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1
require 'discid/track'
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#
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1
module DiscId
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# This class holds information about a disc (TOC, MCN, ISRCs).
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#
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# Use {DiscId#read} or {DiscId#put} to initialize an instance of {Disc}.
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1
class Disc
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# The device from which this disc object was read.
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1
attr_reader :device
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-
# @private
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1
def initialize
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15
pointer = Lib.new
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15
@handle = FFI::AutoPointer.new(pointer, Lib.method(:free))
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15
@read = false
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15
@tracks = nil
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end
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-
# @private
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1
def read(device, *features)
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3
@read = false
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3
device = DiscId.default_device if device.nil?
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-
3
if not device.respond_to? :to_s
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1
raise TypeError, 'wrong argument type (expected String)'
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end
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-
2
@device = device.to_s
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2
flags = Lib.features_to_int features
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2
result = Lib.read @handle, @device, flags
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-
2
if result == 0
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2
raise DiscError, Lib.get_error_msg(@handle)
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else
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@read = true
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end
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end
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-
# @private
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1
def put(first_track, sectors, offsets)
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10
@read = false
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10
@device = nil
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10
last_track = first_track - 1 + offsets.length
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# discid_put expects always an offsets array with exactly 100 elements.
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10
FFI::MemoryPointer.new(:int, 100) do |p|
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10
if last_track > offsets.length
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2
offsets = Array.new(last_track - offsets.length, 0) + offsets
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end
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10
p.write_array_of_int(([sectors] + offsets)[0, 100])
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10
result = Lib.put @handle, first_track, last_track, p
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-
10
if result == 0
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3
raise DiscError, Lib.get_error_msg(@handle)
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else
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7
@read = true
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end
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end
-
end
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-
# The MusicBrainz DiscID.
-
#
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# @return [String] The DiscID or `nil` if no ID was yet read.
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1
def id
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10
return Lib.get_id @handle if @read
-
end
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# The FreeDB DiscID.
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#
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# @return [String] The DiscID or `nil` if no ID was yet read.
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1
def freedb_id
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1
return Lib.get_freedb_id @handle if @read
-
end
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# The number of the first track on this disc.
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#
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# @return [Integer] The number of the first track or `nil` if no ID was yet read.
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1
def first_track_number
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7
return Lib.get_first_track_num @handle if @read
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end
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# The number of the last track on this disc.
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#
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# @return [Integer] The number of the last track or `nil` if no ID was yet read.
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1
def last_track_number
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39
return Lib.get_last_track_num @handle if @read
-
end
-
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# The length of the disc in sectors.
-
#
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# @return [Integer] Sectors or `nil` if no ID was yet read.
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1
def sectors
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4
return Lib.get_sectors @handle if @read
-
end
-
-
# The length of the disc in seconds.
-
#
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# @return [Integer] Seconds or `nil` if no ID was yet read.
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1
def seconds
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3
DiscId.sectors_to_seconds(sectors) if @read
-
end
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-
# The media catalogue number on the disc, if present.
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#
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# Requires libdiscid >= 0.5. If not supported this method will always
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# return `nil`.
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#
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# @note libdiscid >= 0.3.0 required. Older versions will always return nil.
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# Not available on all platforms, see
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# {http://musicbrainz.org/doc/libdiscid#Feature_Matrix}.
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#
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# @return [String] MCN or `nil` if no ID was yet read.
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1
def mcn
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1
return Lib.get_mcn @handle if @read
-
end
-
-
# Return a string representing CD Table Of Contents (TOC).
-
#
-
# The TOC suitable as a value of the toc parameter when accessing the
-
# MusicBrainz Web Service. This enables fuzzy searching when the actual
-
# DiscID is not found.
-
#
-
# Note that this is the unencoded value, which still contains spaces.
-
#
-
# For libdiscid >= 0.6 the native implementation will be used. For older
-
# versions falls back to extract the TOC from {Disc#submission_url}.
-
#
-
# @since 1.3
-
#
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# @raise [RuntimeError] get_toc_string is unsupported by libdiscid and
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# could not get extracted from {Disc#submission_url}
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# @return [String] The TOC string or `nil` if no ID was yet read.
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1
def toc_string
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4
return nil if not @read
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4
result = Lib.get_toc_string @handle
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4
if not result
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# probably an old version of libdiscid (< 0.6.0)
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# gather toc string from submission_url
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match = /toc=([0-9+]+)/.match self.submission_url
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if match
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result = match[1].tr("+", " ")
-
else
-
raise "can't get toc string from submission url"
-
end
-
end
-
-
4
return result
-
end
-
-
# An URL for submitting the DiscID to MusicBrainz.
-
#
-
# The URL leads to an interactive disc submission wizard that guides the
-
# user through the process of associating this disc's DiscID with a release
-
# in the MusicBrainz database.
-
#
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# @return [String] Submission URL
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1
def submission_url
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1
return Lib.get_submission_url @handle if @read
-
end
-
-
# DiscID to String conversion. Same as calling the method {#id} but guaranteed
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# to return a string.
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#
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# @return [String] The disc ID as a string or an empty string if no ID
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# was yet read.
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1
def to_s
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3
id.to_s
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end
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# Returns an array of {Track} objects. Each Track object contains
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# detailed information about the track.
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#
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# Returns always `nil` if no ID was yet read. The block won't be
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# called in this case.
-
#
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# @yield [Track] If a block is given this method returns `nil` and
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# instead iterates over the block calling the block with one argument.
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# @yieldreturn [nil]
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# @return [Array<Track>] Array of {Track} objects.
-
1
def tracks(&block)
-
7
if @read
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5
read_tracks if @tracks.nil?
-
-
5
if block
-
1
@tracks.each(&block)
-
return nil
-
else
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4
return @tracks
-
end
-
end
-
end
-
-
1
private
-
-
1
def read_tracks
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3
track_number = self.first_track_number - 1
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3
@tracks = []
-
-
3
while track_number < self.last_track_number do
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30
track_number += 1
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30
isrc = Lib.get_track_isrc(@handle, track_number)
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30
offset = Lib.get_track_offset(@handle, track_number)
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30
length = Lib.get_track_length(@handle, track_number)
-
30
track_info = Track.new(track_number, offset, length, isrc)
-
-
30
@tracks << track_info
-
end
-
end
-
-
end
-
end
-
# Copyright (C) 2013-2014 Philipp Wolfer
-
#
-
# This program is free software: you can redistribute it and/or modify
-
# it under the terms of the GNU Lesser General Public License as published by
-
# the Free Software Foundation, either version 3 of the License, or
-
# (at your option) any later version.
-
#
-
# This program is distributed in the hope that it will be useful,
-
# but WITHOUT ANY WARRANTY; without even the implied warranty of
-
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-
# GNU Lesser General Public License for more details.
-
#
-
# You should have received a copy of the GNU Lesser General Public License
-
# along with this program. If not, see <http://www.gnu.org/licenses/>.
-
-
#
-
1
module DiscId
-
# This exception is thrown on errors reading the disc or setting the TOC.
-
1
class DiscError < StandardError
-
end
-
end
-
# Copyright (C) 2013 Philipp Wolfer
-
#
-
# This program is free software: you can redistribute it and/or modify
-
# it under the terms of the GNU Lesser General Public License as published by
-
# the Free Software Foundation, either version 3 of the License, or
-
# (at your option) any later version.
-
#
-
# This program is distributed in the hope that it will be useful,
-
# but WITHOUT ANY WARRANTY; without even the implied warranty of
-
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-
# GNU Lesser General Public License for more details.
-
#
-
# You should have received a copy of the GNU Lesser General Public License
-
# along with this program. If not, see <http://www.gnu.org/licenses/>.
-
-
1
require "ffi"
-
-
#
-
1
module DiscId
-
-
# This module encapsulates the C interface for libdiscid using FFI.
-
# The Lib module is intended for internal use only and should be
-
# considered private.
-
#
-
# @private
-
1
module Lib
-
1
extend FFI::Library
-
1
ffi_lib %w[discid libdiscid.so.0 libdiscid.0.dylib]
-
-
1
attach_function :new, :discid_new, [], :pointer
-
-
1
attach_function :free, :discid_free, [:pointer], :void
-
-
begin
-
1
attach_function :read, :discid_read_sparse, [:pointer, :string, :uint], :int
-
rescue FFI::NotFoundError
-
attach_function :legacy_read, :discid_read, [:pointer, :string], :int
-
-
def self.read(handle, device, _features)
-
legacy_read(handle, device)
-
end
-
end
-
-
1
attach_function :put, :discid_put, [:pointer, :int, :int, :pointer], :int
-
-
1
attach_function :get_error_msg, :discid_get_error_msg, [:pointer], :string
-
-
1
attach_function :get_id, :discid_get_id, [:pointer], :string
-
-
1
attach_function :get_freedb_id, :discid_get_freedb_id, [:pointer], :string
-
-
1
attach_function :get_submission_url, :discid_get_submission_url, [:pointer], :string
-
-
1
attach_function :default_device, :discid_get_default_device, [], :string
-
-
1
attach_function :get_first_track_num, :discid_get_first_track_num, [:pointer], :int
-
-
1
attach_function :get_last_track_num, :discid_get_last_track_num, [:pointer], :int
-
-
1
attach_function :get_sectors, :discid_get_sectors, [:pointer], :int
-
-
1
attach_function :get_track_offset, :discid_get_track_offset, [:pointer, :int], :int
-
-
1
attach_function :get_track_length, :discid_get_track_length, [:pointer, :int], :int
-
-
begin
-
1
attach_function :get_toc_string, :discid_get_toc_string, [:pointer], :string
-
rescue FFI::NotFoundError
-
def self.get_toc_string
-
return nil
-
end
-
end
-
-
begin
-
1
attach_function :get_mcn, :discid_get_mcn, [:pointer], :string
-
rescue FFI::NotFoundError
-
def self.get_mcn(_handle)
-
return nil
-
end
-
end
-
-
begin
-
1
attach_function :get_track_isrc, :discid_get_track_isrc, [:pointer, :int], :string
-
rescue FFI::NotFoundError
-
def self.get_track_isrc(_handle, _track)
-
return nil
-
end
-
end
-
-
1
Features = enum(:feature, [:read, 1 << 0,
-
:mcn, 1 << 1,
-
:isrc, 1 << 2])
-
-
begin
-
1
attach_function :has_feature, :discid_has_feature, [:feature], :int
-
rescue FFI::NotFoundError
-
def self.has_feature(feature)
-
return feature.to_sym == :read ? 1 : 0
-
end
-
end
-
-
#attach_function :get_feature_list, :discid_get_feature_list, [:pointer], :void
-
-
begin
-
1
attach_function :get_version_string, :discid_get_version_string, [], :string
-
rescue FFI::NotFoundError
-
def self.get_version_string
-
return "libdiscid < 0.4.0"
-
end
-
end
-
-
1
def self.features_to_int(features)
-
6
feature_flags = 0
-
6
features.each do |feature|
-
4
if feature.respond_to? :to_sym
-
4
feature = feature.to_sym
-
4
feature_flags = self.add_feature_to_flags(feature_flags, feature)
-
end
-
end
-
-
6
return feature_flags
-
end
-
-
1
private
-
-
1
def self.add_feature_to_flags(flags, feature)
-
flags |= self::Features[feature] if
-
4
self::Features.symbols.include?(feature) and
-
self.has_feature(feature)
-
4
return flags
-
end
-
end
-
end
-
# Copyright (C) 2008-2023 Philipp Wolfer
-
#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Lesser General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU Lesser General Public License for more details.
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#
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# You should have received a copy of the GNU Lesser General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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#
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1
module DiscId
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# This class holds information about a single track.
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#
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# Currently this includes the following fields:
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#
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# * number: The number of the track on the disc.
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# * sectors: Length of the track in sectors.
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# * offset: Start position of the track on the disc in sectors.
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# * end_sector: End position of the track on the disc in sectors.
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# * seconds: Length of the track in seconds.
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# * start_time: Start position of the track on the disc in seconds.
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# * end_time: End position of the track on the disc in seconds.
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# * isrc: The track's ISRC (International Standard Recordings Code)
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# if available.
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#
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# You can access all fields either directly or with the square bracket
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# notation:
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#
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# track = Track.new(1, 150, 16007)
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# puts track.sectors # 16007
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# puts track[:sectors] # 16007
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#
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# @see DiscId::Disc#tracks
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1
class Track
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# The number of the track on the disc.
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#
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# @return [Integer]
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1
attr_reader :number
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# Length of the track in sectors.
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#
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# @return [Integer]
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1
attr_reader :sectors
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# Start position of the track on the disc in sectors.
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#
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# @return [Integer]
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attr_reader :offset
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# ISRC number of the track.
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#
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# @note libdiscid >= 0.3.0 required. Older versions will always return nil.
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# Not available on all platforms, see
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# {http://musicbrainz.org/doc/libdiscid#Feature_Matrix}.
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#
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# @return [String]
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1
attr_reader :isrc
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# Initializes a new Track object.
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1
def initialize(number, offset, sectors, isrc)
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34
@number = number
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@offset = offset
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@sectors = sectors
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@isrc = isrc
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end
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# End position of the track on the disc in sectors.
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#
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# @return [Integer]
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1
def end_sector
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54
offset + sectors
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end
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# Length of the track in seconds.
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#
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# @return [Integer]
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1
def seconds
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27
DiscId.sectors_to_seconds(sectors)
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end
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# Start position of the track on the disc in seconds.
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#
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# @return [Integer]
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1
def start_time
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27
DiscId.sectors_to_seconds(offset)
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end
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# End position of the track on the disc in seconds.
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#
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# @return [Integer]
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1
def end_time
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27
DiscId.sectors_to_seconds(end_sector)
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end
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# Allows access to all fields similar to accessing values in a hash.
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#
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# Example:
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#
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# track = Track.new(1, 150, 16007)
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# puts track.sectors # 16007
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# puts track[:sectors] # 16007
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def [](key)
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if [:number, :sectors, :offset, :end_sector,
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:seconds, :start_time, :end_time, :isrc].include?(key.to_sym)
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method(key).call
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end
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end
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# Converts the Track into a Hash.
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#
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# @return [Hash]
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def to_h
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{
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2
:number => number,
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:sectors => sectors,
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:offset => offset,
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:end_sector => end_sector,
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:seconds => seconds,
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:start_time => start_time,
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:end_time => end_time,
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:isrc => isrc,
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}
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end
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alias_method :to_hash, :to_h
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end
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end