pub unsafe extern "C" fn upscale(
upscaler_ctx: *mut upscaler_ctx_t,
input_image: sd_image_t,
upscale_factor: u32,
) -> sd_image_tpub unsafe extern "C" fn upscale(
upscaler_ctx: *mut upscaler_ctx_t,
input_image: sd_image_t,
upscale_factor: u32,
) -> sd_image_t