#
#
#
from PIL import Image

#
# 0xFF,0xD8 - Start of Image
# 0xFF,0xEn - App Exif data
# 0xFF,0xD8 - DQT - Define Quantization Table
# 0xFF,0xDD - DRI - Define Restart Interval
# 0xFF,0xFE - Comments
# 0xFF,0xC0 - SOF0 - Start of Frame
# 0xFF,0xC2 - SOF2 - Start of Frame
# 0xFF,0xC4 - DHT - Define Huffman Tables
# 0xFF,0xDA - SOS - Start of Scan
# 0xFF,0xDn - RST - Restart  (n=0..7)
# 0xFF,0xEn - Application
# 0xFF,0xD9
# 
# 
# https://en.wikipedia.org/wiki/JPEG

class JpgTools:

  BUF_CHUNK_SIZE = 2048
  data_buf = None
  data_idx = None
  fh       = None

  def __init__(self):
    pass

  #
  def jpgHash(self):


  def findMarkers(self):
    last_idx = len(self.data_buf)
    while


    while ord(self.data_buf[self.data_idx]) != 0xFF:
      self.data_idx = self.data_idx+1

    for idx in range(last_idx):


    while self.data_buf:

    self.getBytes
    pass


  def processFile(self, fname):
    self.data_buf = self.fh.read(self.BUF_CHUNK_SIZE)
    while self.data_buf:
      (ret, fin) = self.findMarkers()



  #
  def getBytes(self, fname):
    if (not self.fh):
      self.fh = open(fname, "rb")
    self.data_buf = self.fh.read(self.BUF_CHUNK_SIZE)


  def processFile(self, fname):
    self.fh = open(fname, "rb")
    self.data_buf = self.fh.read(self.BUF_CHUNK_SIZE)
    if (self.data_buf):
      self.data_idx = 0
      findMarkers()





  #
  def process_OLD(self, fname):
    Image.open(fname)
    # image as a sequence object containing pixel values
    bin_data = list( im.getdata() )
    # returns a string containing pixel data, using the standard "raw" encoder
    im.tostring()

  #
  def getJpgBin_OLD(self, fname):
    img_h = Image.open(fname)
    img_bin = list(img_h.getdata())
    return img_bin