nx_vcodec_pskip_probe.nx

nx_vcodec_pskip_probe.nx -- SIZE THE P-SKIP GAP (seq1105 rung-1 diagnostic). x264 skips 41.9% of foreman P-MBs; its P-SKIP is a MOTION-COMPENSATED copy at the predicted MV with zero residual. OUR skip is ZERO-MV-only (dosk iff vm_sad_zero <= sad_thresh) -- on panning content it may never fire. This probe replays the SHIPPED P chain (rct9, emode 673) on a y4m and, per P frame, counts against the SAME pre-encode reference the encoder saw: ourskip = MBs with zero-MV SAD <= qp*94 (what the shipped gate can skip today) mcskip = MBs with best-searched SAD <= qp*94 (what an MC-skip/merge mode could skip) The mcskip-ourskip delta is the addressable population of rung-1. license: ORIGINAL