pub unsafe extern "C" fn av_get_alt_sample_fmt(
sample_fmt: AVSampleFormat,
planar: c_int,
) -> AVSampleFormat展开描述
Return the planar<->packed alternative form of the given sample format, or AV_SAMPLE_FMT_NONE on error. If the passed sample_fmt is already in the requested planar/packed format, the format returned is the same as the input.