from jdpostct.c:53
METHODDEF(void) post_process_prepass
JPP((j_decompress_ptr cinfo,
JSAMPIMAGE input_buf,
JDIMENSION *in_row_group_ctr,
JDIMENSION in_row_groups_avail,
JSAMPARRAY output_buf,
JDIMENSION *out_row_ctr,
JDIMENSION out_rows_avail);
Implemented in jdpostct.c:157