Class: Wavesync::FileConverter

Inherits:
Object
  • Object
show all
Defined in:
lib/wavesync/file_converter.rb

Constant Summary collapse

DURATION_TOLERANCE_SECONDS = 
0.5

Instance Method Summary collapse

Instance Method Details

#convert(audio, source_file_path, path_resolver, source_format, target_format, padding_seconds: nil, &before_transcode) ⇒ Object

: (Audio audio, String source_file_path, PathResolver path_resolver, AudioFormat source_format, AudioFormat target_format, ?padding_seconds: Numeric?) ?{ () -> void } -> bool



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# File 'lib/wavesync/file_converter.rb', line 9

def convert(audio, source_file_path, path_resolver, source_format, target_format, padding_seconds: nil, &before_transcode)
  needs_format_conversion = target_format.file_type || target_format.sample_rate || target_format.bit_depth
  return false unless needs_format_conversion || padding_seconds&.positive?

  target_path = path_resolver.resolve(source_file_path, audio, target_file_type: target_format.file_type)

  files_to_cleanup = path_resolver.find_files_to_cleanup(target_path, audio)
  files_to_cleanup.each { |file| FileUtils.rm_f(file) }

  if target_format.file_type
    source_converted_path = Pathname(source_file_path).sub_ext(".#{target_format.file_type}")
    return false if source_converted_path.exist?
  end

  if target_path.exist?
    existing_duration = Audio.new(target_path.to_s).duration
    expected_duration = audio.duration + (padding_seconds || 0)
    return false if (existing_duration - expected_duration).abs < DURATION_TOLERANCE_SECONDS

    target_path.delete
  end

  target_path.dirname.mkpath
  before_transcode&.call

  audio.transcode(target_path.to_s, target_sample_rate: target_format.sample_rate,
                                    target_file_type: target_format.file_type,
                                    target_bit_depth: target_format.bit_depth || source_format.bit_depth,
                                    padding_seconds: padding_seconds)

  true
end