QSIN              100 libavfilter/af_afade.c     case QSIN:
QSIN              250 libavfilter/af_afade.c     { "qsin",         "quarter of sine wave",                        0,                    AV_OPT_TYPE_CONST,  {.i64 = QSIN }, 0, 0, FLAGS, "curve" },
QSIN              371 libavfilter/af_afade.c     {     "qsin",     "quarter of sine wave",                          0,                    AV_OPT_TYPE_CONST,  {.i64 = QSIN }, 0, 0, FLAGS, "curve" },