backend: Don't assert on odd-width output for interleaved 422 (UYVY)

This is largely a hack to support scaling by a factor of exactly 2;
but nothing bad seems to happen when it is allowed (given we have a
2-pix-per-cycle ISP it's no more objectionable than odd-width 444).

Signed-off-by: Nick Hollinghurst <[email protected]>

Author: njhollinghurst

src/libpisp/backend/backend_prepare.cpp

@@ -294,7 +294,7 @@ void finalise_output(pisp_be_output_format_config &config)
 		throw std::runtime_error("finalise_output: 420 image height should be even");
 
 	if ((PISP_IMAGE_FORMAT_SAMPLING_420(config.image.format) || PISP_IMAGE_FORMAT_SAMPLING_422(config.image.format)) &&
-		(config.image.width & 1))
+		!PISP_IMAGE_FORMAT_INTERLEAVED(config.image.format) && (config.image.width & 1))
 		throw std::runtime_error("finalise_output: 420/422 image width should be even");
 
 	if (PISP_IMAGE_FORMAT_WALLPAPER(config.image.format))