jpeg_set_quality(&encinfo, quality, TRUE);

  jpeg_set_quality(&encinfo, quality, TRUE);

  encinfo.raw_data_in = TRUE;

  encinfo.raw_data_in = TRUE;

  encinfo.in_color_space = JCS_YCbCr;

  encinfo.in_color_space = JCS_YCbCr;

  encinfo.comp_info[0].h_samp_factor = 2;

  encinfo.comp_info[0].h_samp_factor = 2;