class Transcode < XMorph::Base
  MONO = "mono"
  STEREO = "stereo"
  def set_profiles
    self.profiles = {
      MONO => "ffmpeg -y -i %{IN} -map 0:v -filter_complex \"[0:a:0]aformat=sample_fmts=fltp:sample_rates=48000:channel_layouts=mono[a1]; [0:a:1]aformat=sample_fmts=fltp:sample_rates=48000:channel_layouts=mono[a2]; [a1][a2]amerge[aout0]\" -map \"[aout0]\" -acodec libfdk_aac -vf \"fps=fps=25,scale=1920:1080\" -vcodec libx264 -pix_fmt yuv420p -x264opts nal-hrd=cbr  -g 13 -aspect 16:9 -bf 2 -flags +ilme+ildct -top 1 -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 -vsync 1 -async 1 -ac 2 %{OUT}  ",
      STEREO => "ffmpeg -y -i %{IN} -map 0:v -map 0:a -acodec libfdk_aac -vf \"fps=fps=25,scale=1920:1080\" -vcodec libx264 -pix_fmt yuv420p -x264opts nal-hrd=cbr  -g 13 -aspect 16:9 -bf 2 -flags +ilme+ildct -top 1 -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 -vsync 1 -async 1 -ac 2 %{OUT}  ",
  }
  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#TYT: using profile #{self.profile_name}") unless self.profile_name.nil?
    return true
  end

end