pub unsafe extern "C" fn av_chroma_location_pos_to_enum(
xpos: c_int,
ypos: c_int,
) -> AVChromaLocation展开描述
Converts swscale x/y chroma position to AVChromaLocation.
The positions represent the chroma (0,0) position in a coordinates system with luma (0,0) representing the origin and luma(1,1) representing 256,256
@param xpos horizontal chroma sample position @param ypos vertical chroma sample position