ff_snow_vertical_compose97i 4619 libavcodec/dsputil.c     c->vertical_compose97i = ff_snow_vertical_compose97i;
ff_snow_vertical_compose97i  124 libavcodec/snow.h void ff_snow_vertical_compose97i(IDWTELEM *b0, IDWTELEM *b1, IDWTELEM *b2, IDWTELEM *b3, IDWTELEM *b4, IDWTELEM *b5, int width);