MISSING_ERR       440 libavcodec/alsdec.c     MISSING_ERR(sconf->floating,  "Floating point decoding",     AVERROR_PATCHWELCOME);
MISSING_ERR       441 libavcodec/alsdec.c     MISSING_ERR(sconf->rlslms,    "Adaptive RLS-LMS prediction", AVERROR_PATCHWELCOME);