Over the weekend I added a test Altivec function to pix_add. There's an #ifedf wrapped around a call to the processYUVAltivec() function in the standard scalar routine. After trying a few things this seems like a fairly simple way to implement Altivec and MMX. Can someone check the compile on Linux and Windows?
Also, there is a new object: pix_mix. It mixes two images together. Try it out, and have some fun.
cgc