id	summary	reporter	owner	description	type	status	priority	component	version	resolution	keywords	cc	blockedby	blocking	reproduced	analyzed
1854	libswscale has unreasonable alignment constraints	gjdfgh		"First of, there's a difference between alignment of single pixels, and alignment of the image start pointer. It's reasonable to demand strict alignment constraints on single pixels, e.g. that a pixels of size 4 should be aligned to 4.

But having a 16 byte alignment on a pixel start pointer is not reasonable. For example, this doesn't allow passing cropped images to libswscale. (Unless the images are cropped in a way they satisfy the alignment constraints again.)

Rather than fully reverting to the slow path in this case, libswscale should use the slow path only for the first N unaligned pixels, until an aligned pixel is reached, and then continue with an accelerated SIMD code path."	enhancement	new	wish	swscale	git-master						0	0