class Transcode < XMorph::Base
  MONO = "mono"
  STEREO = "stereo"
  def set_profiles
    self.profiles = {
      MONO => "ffmpeg -y -i %{IN} -vf \"fps=fps=25.000000,scale=1920x1080\" -filter_complex \"[0:a:0][0:a:1]amerge=inputs=2[aout0]\" -pix_fmt yuv420p -vcodec h264 -g 13 -bf 2 -x264opts nal-hrd=cbr -profile:v high -flags +ilme+ildct -top 1 -vb 12000000 -minrate:v 12000000 -maxrate:v 12000000 -bufsize:v 24000000 -acodec libfdk_aac -profile:a aac_low -ab 192k -map 0:v -map [\"aout0\"] -muxrate 13411200 -streamid 0:2064 -streamid 1:2068 %{OUT} 2>&1",
      STEREO => "ffmpeg -y -i %{IN} -vf \"fps=fps=25.000000,scale=1920x1080\" -pix_fmt yuv420p  -vcodec h264 -g 13 -bf 2 -x264opts nal-hrd=cbr -profile:v high -vb 12000000 -minrate:v 12000000 -maxrate:v 12000000 -bufsize:v 24000000 -acodec libfdk_aac -profile:a aac_low -ab 192k -map 0:v -map 0:a:0  -muxrate 13411200  -streamid 0:2064  -streamid 1:2068  -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 => IGNORE, #all downcased
    }
  end

  def audio_checks
    {
      PRESENCE_OF_AUDIO_TRACK => VALIDATE,
      ALLOWED_NUMBER_OF_AUDIO_TRACKS => [1, 4, 8],
      ALLOWED_AUDIO_CODECS => ["aac", "pcm"],
      ALLOWED_AUDIO_BIT_RATE => IGNORE,
      ALLOWED_NUMBER_OF_AUDIO_CHANNELS => [1, 2],
    }
  end

  #profiles are classified based on number channels in audio tracks.
  def set_profile_name
    self.profile_name = nil
    mediainfo = self.mediainfo_output
    mono = "true"
    audio_tracks = mediainfo["Audio"]
    audio_tracks.each_with_index do |audio, index|
      if audio["Channel_s_"] =~ /2/
        mono = "false"
      elsif audio["Channel_s_"] =~ /1/
        mono = "true"
      end 
    end
    self.profile_name = (mono == "true")? MONO : STEREO
    XMorph::Base.logger.debug("XMorph#set_profile_name#rewind: using profile #{self.profile_name}") unless self.profile_name.nil?
    return true
  end

end