ARNR Lookup Table.
ARNR Lookup Table.

Change submitted for Adrian Grange. Convert threshold
calculation in ARNR filter to a lookup table.

Change-Id: I12a4bbb96b9ce6231ce2a6ecc2d295610d49e7ec

lyx2014/libvpx_c,smarter/aom,lyx2014/libvpx_c,shyamalschandra/libvpx,smarter/aom,turbulenz/libvpx,ShiftMediaProject/libvpx,Maria1099/webm.libvpx,iniwf/webm.libvpx,mwgoldsmith/vpx,awatry/libvpx.opencl,vasilvv/esvp8,VTCSecureLLC/libvpx,enmasse-entertainment/libvpx,goodleixiao/vpx,stewnorriss/libvpx,ittiamvpx/libvpx,felipebetancur/libvpx,kalli123/webm.libvpx,zofuthan/libvpx,Laknot/libvpx,pcwalton/libvpx,shareefalis/libvpx,Distrotech/libvpx,kalli123/webm.libvpx,lyx2014/libvpx_c,enmasse-entertainment/libvpx,vasilvv/esvp8,Topopiccione/libvpx,vasilvv/esvp8,lyx2014/libvpx_c,kim42083/webm.libvpx,jmvalin/aom,vasilvv/esvp8,charup/https---github.com-webmproject-libvpx-,jmvalin/aom,shareefalis/libvpx,shyamalschandra/libvpx,genesi/libvpx0,jacklicn/webm.libvpx,Acidburn0zzz/webm.libvpx,ShiftMediaProject/libvpx,ittiamvpx/libvpx,mwgoldsmith/libvpx,Maria1099/webm.libvpx,ittiamvpx/libvpx-1,luctrudeau/aom,liqianggao/libvpx,Distrotech/libvpx,kim42083/webm.libvpx,thdav/aom,smarter/aom,rikaunite/gst-opera_libvpx,turbulenz/libvpx,n4t/libvpx,mrchapp/libvpx,vasilvv/esvp8,mrchapp/libvpx,WebRTC-Labs/libvpx,Suvarna1488/webm.libvpx,ittiamvpx/libvpx-1,iniwf/webm.libvpx,cinema6/libvpx,jmvalin/aom,Acidburn0zzz/webm.libvpx,pcwalton/libvpx,WebRTC-Labs/libvpx,webmproject/libvpx,mwgoldsmith/libvpx,smarter/aom,ittiamvpx/libvpx-1,luctrudeau/aom,genesi/libvpx0,stewnorriss/libvpx,Suvarna1488/webm.libvpx,jmvalin/aom,kleopatra999/webm.libvpx,jdm/libvpx,thdav/aom,Topopiccione/libvpx,felipebetancur/libvpx,vasilvv/esvp8,abwiz0086/webm.libvpx,mwgoldsmith/libvpx,awatry/libvpx.opencl,reimaginemedia/webm.libvpx,genesi/libvpx0,kim42083/webm.libvpx,running770/libvpx,Acidburn0zzz/webm.libvpx,mrchapp/libvpx,Distrotech/libvpx,lyx2014/libvpx_c,turbulenz/libvpx,abwiz0086/webm.libvpx,genesi/libvpx0,pcwalton/libvpx,sanyaade-teachings/libvpx,webmproject/libvpx,kalli123/webm.libvpx,GrokImageCompression/aom,Topopiccione/libvpx,cinema6/libvpx,VTCSecureLLC/libvpx,GrokImageCompression/aom,rikaunite/gst-opera_libvpx,goodleixiao/vpx,ittiamvpx/libvpx,ittiamvpx/libvpx,charup/https---github.com-webmproject-libvpx-,mwgoldsmith/vpx,ShiftMediaProject/libvpx,enmasse-entertainment/libvpx,charup/https---github.com-webmproject-libvpx-,openpeer/libvpx_new,zofuthan/libvpx,matanbs/vp982,openpeer/libvpx_new,luctrudeau/aom,turbulenz/libvpx,matanbs/webm.libvpx,ittiamvpx/libvpx-1,altogother/webm.libvpx,shacklettbp/aom,shacklettbp/aom,mrchapp/libvpx,reimaginemedia/webm.libvpx,altogother/webm.libvpx,turbulenz/libvpx,liqianggao/libvpx,thdav/aom,WebRTC-Labs/libvpx,jdm/libvpx,webmproject/libvpx,altogother/webm.libvpx,gshORTON/webm.libvpx,mrchapp/libvpx,running770/libvpx,smarter/aom,mbebenita/aom,n4t/libvpx,zofuthan/libvpx,n4t/libvpx,goodleixiao/vpx,Acidburn0zzz/webm.libvpx,Topopiccione/libvpx,Suvarna1488/webm.libvpx,jdm/libvpx,Suvarna1488/webm.libvpx,ShiftMediaProject/libvpx,Laknot/libvpx,sanyaade-teachings/libvpx,matanbs/vp982,mwgoldsmith/vpx,liqianggao/libvpx,matanbs/webm.libvpx,matanbs/vp982,charup/https---github.com-webmproject-libvpx-,pcwalton/libvpx,openpeer/libvpx_new,stewnorriss/libvpx,VTCSecureLLC/libvpx,matanbs/vp982,zofuthan/libvpx,rikaunite/gst-opera_libvpx,matanbs/vp982,altogother/webm.libvpx,kim42083/webm.libvpx,Acidburn0zzz/webm.libvpx,GrokImageCompression/aom,WebRTC-Labs/libvpx,pcwalton/libvpx,hsueceumd/test_hui,VTCSecureLLC/libvpx,shyamalschandra/libvpx,shyamalschandra/libvpx,jacklicn/webm.libvpx,Maria1099/webm.libvpx,GrokImageCompression/aom,ittiamvpx/libvpx,kleopatra999/webm.libvpx,Topopiccione/libvpx,Distrotech/libvpx,shareefalis/libvpx,matanbs/vp982,charup/https---github.com-webmproject-libvpx-,mbebenita/aom,matanbs/vp982,GrokImageCompression/aom,liqianggao/libvpx,altogother/webm.libvpx,iniwf/webm.libvpx,jacklicn/webm.libvpx,thdav/aom,kleopatra999/webm.libvpx,zofuthan/libvpx,mbebenita/aom,kleopatra999/webm.libvpx,sanyaade-teachings/libvpx,sanyaade-teachings/libvpx,VTCSecureLLC/libvpx,Laknot/libvpx,cinema6/libvpx,thdav/aom,Topopiccione/libvpx,shareefalis/libvpx,genesi/libvpx0,running770/libvpx,Acidburn0zzz/webm.libvpx,pcwalton/libvpx,cinema6/libvpx,GrokImageCompression/aom,turbulenz/libvpx,jacklicn/webm.libvpx,hsueceumd/test_hui,smarter/aom,WebRTC-Labs/libvpx,hsueceumd/test_hui,mbebenita/aom,stewnorriss/libvpx,kalli123/webm.libvpx,gshORTON/webm.libvpx,iniwf/webm.libvpx,felipebetancur/libvpx,shyamalschandra/libvpx,charup/https---github.com-webmproject-libvpx-,liqianggao/libvpx,openpeer/libvpx_new,turbulenz/libvpx,ShiftMediaProject/libvpx,mrchapp/libvpx,kim42083/webm.libvpx,luctrudeau/aom,stewnorriss/libvpx,VTCSecureLLC/libvpx,matanbs/webm.libvpx,gshORTON/webm.libvpx,Suvarna1488/webm.libvpx,abwiz0086/webm.libvpx,mwgoldsmith/vpx,Laknot/libvpx,jacklicn/webm.libvpx,reimaginemedia/webm.libvpx,mwgoldsmith/libvpx,turbulenz/libvpx,awatry/libvpx.opencl,gshORTON/webm.libvpx,mbebenita/aom,n4t/libvpx,ittiamvpx/libvpx-1,shacklettbp/aom,ittiamvpx/libvpx-1,jmvalin/aom,abwiz0086/webm.libvpx,running770/libvpx,running770/libvpx,gshORTON/webm.libvpx,genesi/libvpx0,rikaunite/gst-opera_libvpx,webmproject/libvpx,running770/libvpx,jdm/libvpx,altogother/webm.libvpx,mbebenita/aom,abwiz0086/webm.libvpx,ittiamvpx/libvpx,felipebetancur/libvpx,mwgoldsmith/libvpx,Distrotech/libvpx,mwgoldsmith/vpx,openpeer/libvpx_new,cinema6/libvpx,abwiz0086/webm.libvpx,thdav/aom,goodleixiao/vpx,sanyaade-teachings/libvpx,enmasse-entertainment/libvpx,felipebetancur/libvpx,shareefalis/libvpx,webmproject/libvpx,reimaginemedia/webm.libvpx,goodleixiao/vpx,luctrudeau/aom,gshORTON/webm.libvpx,shareefalis/libvpx,Distrotech/libvpx,cinema6/libvpx,stewnorriss/libvpx,zofuthan/libvpx,mbebenita/aom,vasilvv/esvp8,hsueceumd/test_hui,goodleixiao/vpx,cinema6/libvpx,matanbs/webm.libvpx,iniwf/webm.libvpx,rikaunite/gst-opera_libvpx,Maria1099/webm.libvpx,luctrudeau/aom,jdm/libvpx,hsueceumd/test_hui,mwgoldsmith/libvpx,iniwf/webm.libvpx,shacklettbp/aom,n4t/libvpx,openpeer/libvpx_new,jmvalin/aom,kleopatra999/webm.libvpx,felipebetancur/libvpx,matanbs/webm.libvpx,kleopatra999/webm.libvpx,Laknot/libvpx,Maria1099/webm.libvpx,turbulenz/libvpx,reimaginemedia/webm.libvpx,kalli123/webm.libvpx,kalli123/webm.libvpx,shacklettbp/aom,shacklettbp/aom,Laknot/libvpx,reimaginemedia/webm.libvpx,enmasse-entertainment/libvpx,lyx2014/libvpx_c,matanbs/webm.libvpx,Suvarna1488/webm.libvpx,jdm/libvpx,kim42083/webm.libvpx,liqianggao/libvpx,shyamalschandra/libvpx,mwgoldsmith/vpx,jacklicn/webm.libvpx,webmproject/libvpx,Maria1099/webm.libvpx,awatry/libvpx.opencl,mbebenita/aom,hsueceumd/test_hui,mbebenita/aom