BASEFREQ 82 libavfilter/avf_showcqt.c { "basefreq", "set base frequency", OFFSET(basefreq), AV_OPT_TYPE_DOUBLE, { .dbl = BASEFREQ }, 10.0, 100000.0, FLAGS }, BASEFREQ 469 libavfilter/avf_showcqt.c if (s->basefreq != (double) BASEFREQ || s->endfreq != (double) ENDFREQ) {