Class: Mediakit::Initializers::FFmpeg::DecoderInitializer

Inherits:
Base
  • Object
show all
Defined in:
lib/mediakit/initializers/ffmpeg.rb

Constant Summary collapse

DELIMITER_FOR_CODER = 
"\n ------\n".freeze
SUPPORT_PATTERN =

Encoders: V.…. = Video A.…. = Audio S.…. = Subtitle .F.… = Frame-level multithreading ..S… = Slice-level multithreading …X.. = Codec is experimental .…B. = Supports draw_horiz_band .….D = Supports direct rendering method 1

/(?<support>(?<type>[VAS.])(?<frame_level>[F.])(?<slice_level>[S.])(?<experimental>[X.])(?<horizon_band>[B.])(?<direct_rendering_method>[D.]))/.freeze
PATTERN = 
/\A\s*#{SUPPORT_PATTERN}\s+(?<name>\w+)\s+(?<desc>.+)\z/.freeze

Instance Attribute Summary

Attributes inherited from Base

#items

Instance Method Summary collapse

Methods inherited from Base

#call, #initialize, #parse_items

Constructor Details

This class inherits a constructor from Mediakit::Initializers::FFmpeg::Base

Instance Method Details

#create_item(line) ⇒ Object 



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# File 'lib/mediakit/initializers/ffmpeg.rb', line 109

def create_item(line)
  match =  line.match(PATTERN)
  if match
    attributes = {
      name: match[:name],
      desc: match[:desc],
      frame_level: match[:frame_level] != '.',
      slice_level: match[:slice_level] != '.',
      experimental: match[:experimental] != '.',
      horizon_band: match[:horizon_band] != '.',
      direct_rendering_method: match[:direct_rendering_method] != '.'
    }
    case match[:type]
    when 'V'
      Mediakit::FFmpeg::VideoDecoder.create_constant(
        "DECODER_#{attributes[:name].underscore.upcase}", attributes.merge(type: :video)
      )
    when 'A'
      Mediakit::FFmpeg::AudioDecoder.create_constant(
        "DECODER_#{attributes[:name].underscore.upcase}", attributes.merge(type: :audio)
      )
    when 'S'
      Mediakit::FFmpeg::SubtitleDecoder.create_constant(
        "DECODER_#{attributes[:name].underscore.upcase}", attributes.merge(type: :subtitle)
      )
    else
      raise(UnknownTypeError)
    end
  end
end

#item_type ⇒ Object 



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# File 'lib/mediakit/initializers/ffmpeg.rb', line 98

def item_type
  'decoders'
end

#raw_items ⇒ Object 



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# File 'lib/mediakit/initializers/ffmpeg.rb', line 102

def raw_items
  options = Mediakit::FFmpeg::Options.new(Mediakit::FFmpeg::Options::GlobalOption.new('decoders' => true))
  output = @command.run(options, logger: nil)
  return [] if output.nil? || output.empty?
  output.split(DELIMITER_FOR_CODER)[1].each_line.to_a
end