class Transcode < XMorph::Base
  ADD_AUDIO = "add_audio"
  DEFAULT = "default"
  def set_profiles
    self.profiles = {
      ADD_AUDIO => "ffmpeg -y -i %{IN} -f lavfi -i anullsrc -shortest  -map 0:v:0 -map 1:a:0 -acodec libfdk_aac -profile:a aac_low -ac 2 -ar 48000 -ab 192k -vcodec libx264 -vf \"fps=fps=25,scale=720:576\" -pix_fmt yuv420p -g 13 -bf 2 -profile:v high -vb 8000000  -minrate:v 8000k -maxrate:v 8000k -bufsize:v 16000k -muxrate 9000k -x264opts nal-hrd=cbr  -pes_payload_size 16 -streamid 0:2064 -streamid 1:2068 %{OUT} 2>&1",
      DEFAULT => "ffmpeg -y -i %{IN} -map 0:v:0 -map 0:a:0 -acodec libfdk_aac -profile:a aac_low -ac 2 -ar 48000 -ab 192k -vcodec libx264 -vf 'fps=fps=25,scale=720:576' -pix_fmt yuv420p -g 13 -bf 2 -profile:v high -vb 8000000  -minrate:v 8000k -maxrate:v 8000k -bufsize:v 16000k -muxrate 9000k -x264opts nal-hrd=cbr  -pes_payload_size 16 -streamid 0:2064 -streamid 1:2068 %{OUT} 2>&1"
    }
  end

  def video_checks
    {
      ALLOWED_ASPECT_RATIO => ["16:9", "5:4"],
      ALLOWED_HEIGHT => [720, 1080, 576],
      ALLOWED_WIDTH => [1280, 1920, 720], 
      ALLOWED_FRAME_RATE => IGNORE,
      ALLOWED_VIDEO_BIT_RATE => IGNORE, #Mbps
      ALLOWED_SCAN_TYPE => IGNORE, #all downcased
    }
  end

  def audio_checks
    {
      PRESENCE_OF_AUDIO_TRACK => IGNORE,
      ALLOWED_NUMBER_OF_AUDIO_TRACKS => [0, 1],
      ALLOWED_AUDIO_CODECS => ["aac"],
      ALLOWED_AUDIO_BIT_RATE => IGNORE,
      ALLOWED_NUMBER_OF_AUDIO_CHANNELS => [1, 2],
    }
  end

  # Classification is based on presence of audio track 
  # Audio track is added for Videos with no audio track
  def set_profile_name
    self.profile_name = nil
    self.error = nil

    mediainfo = self.mediainfo_output
    audio_tracks = mediainfo["Audio"]
    self.profile_name = (audio_tracks.empty?) ? ADD_AUDIO : DEFAULT
    XMorph::Base.logger.debug("XMorph#set_profile_name#hkitv: using profile #{self.profile_name}") unless self.profile_name.nil?
    return true
  end
end