ff_planar_sample_fmts  295 libavfilter/af_channelmap.c     ff_set_common_formats(ctx, ff_planar_sample_fmts());
ff_planar_sample_fmts   87 libavfilter/af_channelsplit.c     ff_set_common_formats    (ctx, ff_planar_sample_fmts());
ff_planar_sample_fmts  260 libavfilter/af_join.c     ff_set_common_formats    (ctx, ff_planar_sample_fmts());
ff_planar_sample_fmts  211 libavfilter/formats.h AVFilterFormats *ff_planar_sample_fmts(void);