Class: TEF::Sequencing::AudacityReader

Inherits:
Object
  • Object
show all
Defined in:
lib/tef/Sequencing/AudacityLabelReader.rb

Overview

Audacity label reader helper.

This class is meant to read in an exported list of Labels, as generated by audacity. It provides proper data conversion and a few convenience functions.

Instance Method Summary collapse

Constructor Details

#initialize(file) ⇒ AudacityReader

Initialize a new reader.

This will read in the given file and process it. Note that since Audacity does not export the name of different label tracks, it simply exports all labels, each label track should begin with a label called “TRACK: Name”. This serves as a means to separate label tracks.

Parameters:

  • file (String) —

    The file to read. Should be a tab-separated list of start and end time and label name.



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# File 'lib/tef/Sequencing/AudacityLabelReader.rb', line 21

def initialize(file)
	@tracks = Hash.new({});

	File.open(file, 'r') do |f|
		current_track = 'default';
		@tracks['default'] = [];

		f.each do |line|
			m = /^(?<start>[\.\d]+)\s+(?<stop>[\d\.]+)\s+(?<text>\S.+)/.match line
			next unless m;

			if(m[:text] =~ /TRACK:\s*(\S.+)/)
				current_track = $1;
				@tracks[current_track] = [];
			else
				@tracks[current_track] << { start: m[:start].to_f, stop: m[:stop].to_f, text: m[:text] }
			end
		end
	end
end

Instance Method Details

#[](name) ⇒ Array<{start: Numeric, stop: Numeric, text: String}] The corresponding list of labels for the given track, or an empty array if the track did not exist.

Returns Array<Numeric, stop: Numeric, text: String] The corresponding list of labels for the given track, or an empty array if the track did not exist.

Returns:

  • (Array<{start: Numeric, stop: Numeric, text: String}] The corresponding list of labels for the given track, or an empty array if the track did not exist.) —

    Array<Numeric, stop: Numeric, text: String] The corresponding list of labels for the given track, or an empty array if the track did not exist.



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# File 'lib/tef/Sequencing/AudacityLabelReader.rb', line 45

def [](name)
	return [] if @tracks[name].nil?

	return @tracks[name]
end