Function x264_picture_alloc

pub unsafe fn x264_picture_alloc(
    pic: *mut X264PictureT,
    i_csp: c_int,
    i_width: c_int,
    i_height: c_int,
) -> c_int

alloc data for a picture.

You must call x264_picture_clean on it. returns 0 on success, or -1 on malloc failure or invalid colorspace.