REPLAYGAIN_DROP    77 libavfilter/af_volume.c             OFFSET(replaygain), AV_OPT_TYPE_INT, { .i64 = REPLAYGAIN_DROP }, REPLAYGAIN_DROP, REPLAYGAIN_ALBUM, A, "replaygain" },
REPLAYGAIN_DROP    78 libavfilter/af_volume.c         { "drop",   "replaygain side data is dropped", 0, AV_OPT_TYPE_CONST, { .i64 = REPLAYGAIN_DROP   }, 0, 0, A, "replaygain" },
REPLAYGAIN_DROP   349 libavfilter/af_volume.c         if (vol->replaygain != REPLAYGAIN_DROP) {