synthfilt_build_sb_samples 1155 libavcodec/qdm2.c     synthfilt_build_sb_samples(q, &gb, length, 0, 8);
synthfilt_build_sb_samples 1171 libavcodec/qdm2.c     synthfilt_build_sb_samples(q, &gb, length, 8, QDM2_SB_USED(q->sub_sampling));