AV_QSORT          472 libavfilter/avf_showcqt.c         AV_QSORT(s->coeff_sort, fft_len, SparseCoeff, qsort_sparsecoeff);
AV_QSORT          357 libavfilter/vf_palettegen.c             AV_QSORT(&s->refs[box->start], box->len, const struct color_ref *, cmpf);
AV_QSORT          640 libavfilter/vf_paletteuse.c     AV_QSORT(tmp_pal, nb_color, struct color, cmpf);