2 commits

Author	SHA1	Message	Date
Michael Sevakis	e5c3327cef	Add a more correct absolute difference function to dsp-util. ... Differences between signed samples cover the entire unsigned 32-bit range. "abs" will think any difference exceeding INT32_MAX is negative which is not corrent. Test which argument is greater and subtract the lesser from it, outputting unsigned difference. Change-Id: I73a8e5e418d49ff73d1a7c98eeb4731946dcfe84	2012-04-26 16:04:43 -04:00
Michael Sevakis	a43df152c2	Collect the 16-bit signed range sample clipping routines scattered about, which can be optimized on armv6 and create firmware/export/dsp-util.h (for lack of better place right now). ... git-svn-id: svn://svn.rockbox.org/rockbox/trunk@31142 a1c6a512-1295-4272-9138-f99709370657	2011-12-04 18:19:39 +00:00