MAKE_WRITABLE      43 libavcodec/mpegpicture.c     MAKE_WRITABLE(mb_var_buf);
MAKE_WRITABLE      44 libavcodec/mpegpicture.c     MAKE_WRITABLE(mc_mb_var_buf);
MAKE_WRITABLE      45 libavcodec/mpegpicture.c     MAKE_WRITABLE(mb_mean_buf);
MAKE_WRITABLE      46 libavcodec/mpegpicture.c     MAKE_WRITABLE(mbskip_table_buf);
MAKE_WRITABLE      47 libavcodec/mpegpicture.c     MAKE_WRITABLE(qscale_table_buf);
MAKE_WRITABLE      48 libavcodec/mpegpicture.c     MAKE_WRITABLE(mb_type_buf);
MAKE_WRITABLE      51 libavcodec/mpegpicture.c         MAKE_WRITABLE(motion_val_buf[i]);
MAKE_WRITABLE      52 libavcodec/mpegpicture.c         MAKE_WRITABLE(ref_index_buf[i]);