flac_p = "/usr/bin/flac"

def test_flac(f) =
  if process.test("which metaflac") then
    channels = list.hd(default="",process.read.lines("metaflac --show-channels #{process.quote(f)} 2>/dev/null"))
    #If the value is not an int, this returns 0 and we are ok :)
    int_of_string(channels)
  else
    if string.match(pattern="flac", f) then
      # We do not know the number of audio channels so setting to -1
      (-1)
    else
      # All tests failed: no audio decodable using flac..
      0
    end
  end
end

decoder.add(name="FLAC", description="Decode files using the flac decoder binary.", test=test_flac, flac_p)