PARAM1_DEFAULT    203 libavfilter/vf_hqdn3d.c         s->strength[LUMA_SPATIAL] = PARAM1_DEFAULT;
PARAM1_DEFAULT    205 libavfilter/vf_hqdn3d.c         s->strength[CHROMA_SPATIAL] = PARAM2_DEFAULT * s->strength[LUMA_SPATIAL] / PARAM1_DEFAULT;
PARAM1_DEFAULT    207 libavfilter/vf_hqdn3d.c         s->strength[LUMA_TMP]   = PARAM3_DEFAULT * s->strength[LUMA_SPATIAL] / PARAM1_DEFAULT;