IRIDFT             52 libavcodec/rdft.c     const double theta = (trans == RDFT || trans == IRIDFT ? -1 : 1)*2*M_PI/n;
IRIDFT             55 libavcodec/rdft.c     s->inverse         = trans == IRDFT || trans == IRIDFT;
IRIDFT             56 libavcodec/rdft.c     s->sign_convention = trans == RIDFT || trans == IRIDFT ? 1 : -1;
IRIDFT             65 libavcodec/rdft.c     s->tsin = ff_sin_tabs[nbits-4]+(trans == RDFT || trans == IRIDFT)*(n>>2);