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Hi, This patch adds Altivec-optimized implementations of oc_enc_frag_sad and oc_enc_frag_ssd. This patch is against the latest svn revision of theora-ptalarbvorm. Speeds up encode on a plant stop-motion clip on a 1 GHz PPC 7447 by ~3%, timewise. Time spent in oc_enc_frag_sad is reduced from 4.2% to 2.3% and oc_enc_frag_ssd from 1.2% to 1.0%, as reported by Shark. Currently this is only