59 lines
1.2 KiB
Ruby
59 lines
1.2 KiB
Ruby
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#!/usr/bin/env ruby
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require 'csv'
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def process_kfn(file)
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# Check if the file exists
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unless File.exist?(file)
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raise "File not found: #{file}"
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end
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# Read the file contents
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file_contents = CSV.read(file, col_sep: "\t")
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# Generate bpm and start_time
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bpm = generate_bpm(file_contents)
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start_time = generate_start_time(file_contents)
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[bpm, start_time]
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end
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def generate_bpm(file_contents)
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# Look at only the first 8 rows for BPM calculation
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rows = file_contents.first(8)
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# Calculate the deltas (differences in the 2nd column values)
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deltas = rows.each_cons(2).map do |row1, row2|
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row2[1].to_f - row1[1].to_f
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end
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# Average the deltas and convert to BPM
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average_delta = deltas.sum / deltas.size
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bpm = (1 / average_delta) * 60
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bpm.round(2) # Return rounded BPM value
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end
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def generate_start_time(file_contents)
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# Return the 2nd column value of the first row
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file_contents.first[1].to_f
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end
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if __FILE__ == $0
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# Main script execution
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if ARGV.size != 1
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puts "Usage: #{$PROGRAM_NAME} <kfn_file>"
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exit 1
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end
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kfn_file = ARGV[0]
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begin
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bpm, start_time = process_kfn(kfn_file)
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puts "BPM: #{bpm}"
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puts "Start Time: #{start_time}"
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rescue => e
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puts "Error: #{e.message}"
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end
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end
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