class Transcode < XMorph::Base

  PROGRESSIVE = "progressive"
  INTERLACED = "interlaced"
  def set_profiles
    self.profiles = {
      PROGRESSIVE => "ffmpeg -y -i %{IN} -map 0:v -map 0:a:0 -map 0:a:0 -c:a:0 libfdk_aac -profile:a aac_low -ac 2 -ab 192k -c:a:1 ac3 -ac 2 -ab 320k -c:v libx264 -vf \"fps=fps=29.97,scale=1920:1080\" -pix_fmt yuv420p -x264opts nal-hrd=cbr -g 13 -aspect 16:9 -bf 2 -profile:v high -b:v 12M -minrate:v 12M -maxrate:v 12M -muxrate 14M -bufsize:v 25M -pes_payload_size 16 -streamid 0:2064 -streamid 1:2068 -streamid 2:2069 -vsync 1 -async 1 %{OUT} 2>&1",
      INTERLACED => "ffmpeg -y -i %{IN} -map 0:v -map 0:a:0 -map 0:a:0 -c:a:0 libfdk_aac -profile:a aac_low -ac 2 -ab 192k -c:a:1 ac3 -ac 2 -ab 320k -c:v libx264 -vf \"fps=fps=29.97,scale=1920:1080\" -pix_fmt yuv420p  -flags +ilme+ildct -top 1 -x264opts nal-hrd=cbr -g 13 -aspect 16:9 -bf 2 -profile:v high -b:v 12M -minrate:v 12M -maxrate:v 12M -muxrate 14M -bufsize:v 25M -pes_payload_size 16 -streamid 0:2064 -streamid 1:2068 -streamid 2:2069 -vsync 1 -async 1 %{OUT} 2>&1"
    }
  end

  def video_checks
    {
      ALLOWED_ASPECT_RATIO => ["16:9"],
      ALLOWED_HEIGHT => [1080],
      ALLOWED_WIDTH => [1920], 
      ALLOWED_FRAME_RATE => IGNORE,
      ALLOWED_VIDEO_BIT_RATE => IGNORE, #Mbps
      ALLOWED_SCAN_TYPE => ["progressive", "interlaced"], #all downcased
    }
  end

  def audio_checks
    {
      PRESENCE_OF_AUDIO_TRACK => VALIDATE,
      ALLOWED_NUMBER_OF_AUDIO_TRACKS => [1, 2],
      ALLOWED_AUDIO_CODECS => ["ac-3", "aac"],
      ALLOWED_AUDIO_BIT_RATE => IGNORE,
      ALLOWED_NUMBER_OF_AUDIO_CHANNELS => [2],
    }
  end

  # Classification is based on scan type 
  # Video of type progressive and interlaced are scaled to 1920x1080
  def set_profile_name
    self.profile_name = nil
    self.error = nil
    mediainfo = self.mediainfo_output
    scan_type = mediainfo["Video"]["Scan_type"]
    self.profile_name = (scan_type.downcase == "progressive")? PROGRESSIVE : INTERLACED
    XMorph::Base.logger.debug("XMorph#set_profile_name#dogtv: using profile #{self.profile_name}") unless self.profile_name.nil?
    return true
  end
end