ACOLOR_FUNC      2262 libavfilter/vf_waveform.c ACOLOR_FUNC(column_mirror, 1, 1)
ACOLOR_FUNC      2263 libavfilter/vf_waveform.c ACOLOR_FUNC(column,        1, 0)
ACOLOR_FUNC      2264 libavfilter/vf_waveform.c ACOLOR_FUNC(row_mirror,    0, 1)
ACOLOR_FUNC      2265 libavfilter/vf_waveform.c ACOLOR_FUNC(row,           0, 0)