void LibRaw::lossy_dng_load_raw()
{
  if (!image)
    throw LIBRAW_EXCEPTION_IO_CORRUPT;
  struct jpeg_decompress_struct cinfo;
  struct jpeg_error_mgr jerr;
  JSAMPARRAY buf;
  JSAMPLE(*pixel)[3];
  unsigned sorder = order, ntags, opcode, deg, i, j, c;
  unsigned save = data_offset - 4, trow = 0, tcol = 0, row, col;
  ushort cur[3][256];
  double coeff[9], tot;

  if (meta_offset)
  {
    fseek(ifp, meta_offset, SEEK_SET);
    order = 0x4d4d;
    ntags = get4();
    while (ntags--)
    {
      opcode = get4();
      get4();
      get4();
      if (opcode != 8)
      {
        fseek(ifp, get4(), SEEK_CUR);
        continue;
      }
      fseek(ifp, 20, SEEK_CUR);
      if ((c = get4()) > 2)
        break;
      fseek(ifp, 12, SEEK_CUR);
      if ((deg = get4()) > 8)
        break;
      for (i = 0; i <= deg && i < 9; i++)
        coeff[i] = getreal(12);
      for (i = 0; i < 256; i++)
      {
        for (tot = j = 0; j <= deg; j++)
          tot += coeff[j] * pow(i / 255.0, (int)j);
        cur[c][i] = tot * 0xffff;
      }
    }
    order = sorder;
  }
  else
  {
    gamma_curve(1 / 2.4, 12.92, 1, 255);
    FORC3 memcpy(cur[c], curve, sizeof cur[0]);
  }

  struct jpeg_error_mgr pub;
  cinfo.err = jpeg_std_error(&pub);
  pub.error_exit = jpegErrorExit_d;

  jpeg_create_decompress(&cinfo);

  while (trow < raw_height)
  {
    fseek(ifp, save += 4, SEEK_SET);
    if (tile_length < INT_MAX)
      fseek(ifp, get4(), SEEK_SET);
    if (libraw_internal_data.internal_data.input->jpeg_src(&cinfo) == -1)
    {
      jpeg_destroy_decompress(&cinfo);
      throw LIBRAW_EXCEPTION_DECODE_JPEG;
    }
    jpeg_read_header(&cinfo, TRUE);
    jpeg_start_decompress(&cinfo);
    buf = (*cinfo.mem->alloc_sarray)((j_common_ptr)&cinfo, JPOOL_IMAGE,
                                     cinfo.output_width * 3, 1);
    try
    {
      while (cinfo.output_scanline < cinfo.output_height &&
             (row = trow + cinfo.output_scanline) < height)
      {
        checkCancel();
        jpeg_read_scanlines(&cinfo, buf, 1);
        pixel = (JSAMPLE(*)[3])buf[0];
        for (col = 0; col < cinfo.output_width && tcol + col < width; col++)
        {
          FORC3 image[row * width + tcol + col][c] = cur[c][pixel[col][c]];
        }
      }
    }
    catch (...)
    {
      jpeg_destroy_decompress(&cinfo);
      throw;
    }
    jpeg_abort_decompress(&cinfo);
    if ((tcol += tile_width) >= raw_width)
      trow += tile_length + (tcol = 0);
  }
  jpeg_destroy_decompress(&cinfo);
  maximum = 0xffff;
}
Unknown