my_downsample_ptr  127 jcsample.c       my_downsample_ptr downsample = (my_downsample_ptr) cinfo->downsample;
my_downsample_ptr  153 jcsample.c       my_downsample_ptr downsample = (my_downsample_ptr) cinfo->downsample;
my_downsample_ptr  480 jcsample.c       my_downsample_ptr downsample;
my_downsample_ptr  486 jcsample.c       downsample = (my_downsample_ptr)