class WavTool

# File lib/wavtool.rb, line 14
def initialize(out: 'out.wav', channels: :mono, format_code: :pcm_16, 
    sample_rate: 44100, src_path: '.', verbose: false, debug: false)
  
  @format = Format.new(channels, format_code, sample_rate)
  @src_path, @out = src_path, out
  @verbose, @debug = verbose, debug
  
  if @verbose then
    puts 'WavTool'.highlight 
    puts 'options: generate_silence, concat'.info
    puts
  end
end

# File lib/wavtool.rb, line 46
def concat(files, save_file=@out)
  
  puts ('Running concat ...').info; puts if @verbose
  puts ('files: ' + files.inspect).debug if @debug
  
  verbose, debug = @verbose, @debug
  
  Writer.new(save_file, @format) do |writer|

    files.each do |file_name|

      filepath = File.join(@src_path, file_name)
      puts ('concatenating: ' + filepath.inspect).debug if debug
      Reader.new(filepath).each_buffer(samples_per_buffer=4096) do |buffer|
        writer.write(buffer)
      end

    end
  end
  
  puts ('WAV file ' + @out + ' created').info if @verbose
end

# File lib/wavtool.rb, line 69
def duration(file_name)
  Reader.new(file_name).total_duration    
end

# File lib/wavtool.rb, line 30
def generate_silence(filename=@out, duration: 1)

  square_cycle = [0] * 100 * duration
  buffer = Buffer.new(square_cycle, 
      Format.new(@format.channels, :float, @format.sample_rate))

  Writer.new(filename, @format) do |writer|
    (@format.sample_rate.to_i / 100).times { writer.write(buffer) }
  end

end