CHROMA16_FUNC    1627 libavfilter/vf_waveform.c CHROMA16_FUNC(column,        1, 0)
CHROMA16_FUNC    1628 libavfilter/vf_waveform.c CHROMA16_FUNC(row_mirror,    0, 1)
CHROMA16_FUNC    1629 libavfilter/vf_waveform.c CHROMA16_FUNC(row,           0, 0)