Simplifying decoder_decode() function.
Simplifying decoder_decode() function.

Change-Id: I97293605b430ad9dda0b58c0694fea569e7024a5

shareefalis/libvpx,lyx2014/libvpx_c,zofuthan/libvpx,pcwalton/libvpx,openpeer/libvpx_new,liqianggao/libvpx,iniwf/webm.libvpx,running770/libvpx,shyamalschandra/libvpx,kleopatra999/webm.libvpx,abwiz0086/webm.libvpx,iniwf/webm.libvpx,matanbs/webm.libvpx,mbebenita/aom,shacklettbp/aom,Maria1099/webm.libvpx,charup/https---github.com-webmproject-libvpx-,altogother/webm.libvpx,abwiz0086/webm.libvpx,felipebetancur/libvpx,ittiamvpx/libvpx-1,jdm/libvpx,felipebetancur/libvpx,webmproject/libvpx,ittiamvpx/libvpx,kim42083/webm.libvpx,reimaginemedia/webm.libvpx,matanbs/webm.libvpx,liqianggao/libvpx,matanbs/webm.libvpx,Suvarna1488/webm.libvpx,charup/https---github.com-webmproject-libvpx-,smarter/aom,thdav/aom,mwgoldsmith/vpx,lyx2014/libvpx_c,shareefalis/libvpx,Acidburn0zzz/webm.libvpx,Maria1099/webm.libvpx,webmproject/libvpx,matanbs/vp982,Laknot/libvpx,shacklettbp/aom,Topopiccione/libvpx,luctrudeau/aom,ShiftMediaProject/libvpx,abwiz0086/webm.libvpx,goodleixiao/vpx,kim42083/webm.libvpx,jmvalin/aom,pcwalton/libvpx,iniwf/webm.libvpx,reimaginemedia/webm.libvpx,shareefalis/libvpx,ittiamvpx/libvpx,webmproject/libvpx,jdm/libvpx,pcwalton/libvpx,matanbs/vp982,jdm/libvpx,iniwf/webm.libvpx,mwgoldsmith/libvpx,GrokImageCompression/aom,kalli123/webm.libvpx,kalli123/webm.libvpx,hsueceumd/test_hui,goodleixiao/vpx,gshORTON/webm.libvpx,gshORTON/webm.libvpx,mbebenita/aom,goodleixiao/vpx,goodleixiao/vpx,n4t/libvpx,stewnorriss/libvpx,reimaginemedia/webm.libvpx,ittiamvpx/libvpx-1,charup/https---github.com-webmproject-libvpx-,Topopiccione/libvpx,reimaginemedia/webm.libvpx,hsueceumd/test_hui,luctrudeau/aom,shyamalschandra/libvpx,running770/libvpx,Maria1099/webm.libvpx,GrokImageCompression/aom,luctrudeau/aom,Topopiccione/libvpx,Distrotech/libvpx,ittiamvpx/libvpx,Distrotech/libvpx,ittiamvpx/libvpx,Maria1099/webm.libvpx,running770/libvpx,WebRTC-Labs/libvpx,luctrudeau/aom,mwgoldsmith/libvpx,kim42083/webm.libvpx,smarter/aom,mwgoldsmith/vpx,hsueceumd/test_hui,Laknot/libvpx,shyamalschandra/libvpx,Suvarna1488/webm.libvpx,kalli123/webm.libvpx,WebRTC-Labs/libvpx,shyamalschandra/libvpx,Topopiccione/libvpx,stewnorriss/libvpx,shacklettbp/aom,jacklicn/webm.libvpx,mwgoldsmith/libvpx,iniwf/webm.libvpx,jmvalin/aom,openpeer/libvpx_new,mbebenita/aom,liqianggao/libvpx,running770/libvpx,webmproject/libvpx,jacklicn/webm.libvpx,VTCSecureLLC/libvpx,mwgoldsmith/vpx,matanbs/webm.libvpx,matanbs/vp982,running770/libvpx,jacklicn/webm.libvpx,thdav/aom,Acidburn0zzz/webm.libvpx,WebRTC-Labs/libvpx,Laknot/libvpx,thdav/aom,mwgoldsmith/libvpx,webmproject/libvpx,kalli123/webm.libvpx,Suvarna1488/webm.libvpx,mwgoldsmith/vpx,zofuthan/libvpx,Topopiccione/libvpx,mwgoldsmith/libvpx,GrokImageCompression/aom,n4t/libvpx,mbebenita/aom,Suvarna1488/webm.libvpx,ShiftMediaProject/libvpx,VTCSecureLLC/libvpx,zofuthan/libvpx,n4t/libvpx,smarter/aom,pcwalton/libvpx,ShiftMediaProject/libvpx,jmvalin/aom,shyamalschandra/libvpx,lyx2014/libvpx_c,liqianggao/libvpx,felipebetancur/libvpx,ShiftMediaProject/libvpx,liqianggao/libvpx,openpeer/libvpx_new,Suvarna1488/webm.libvpx,charup/https---github.com-webmproject-libvpx-,goodleixiao/vpx,webmproject/libvpx,altogother/webm.libvpx,pcwalton/libvpx,matanbs/webm.libvpx,ittiamvpx/libvpx,Distrotech/libvpx,matanbs/vp982,jmvalin/aom,goodleixiao/vpx,ittiamvpx/libvpx-1,abwiz0086/webm.libvpx,altogother/webm.libvpx,smarter/aom,altogother/webm.libvpx,WebRTC-Labs/libvpx,kim42083/webm.libvpx,kleopatra999/webm.libvpx,felipebetancur/libvpx,luctrudeau/aom,jacklicn/webm.libvpx,shareefalis/libvpx,liqianggao/libvpx,Acidburn0zzz/webm.libvpx,gshORTON/webm.libvpx,lyx2014/libvpx_c,GrokImageCompression/aom,shacklettbp/aom,Distrotech/libvpx,Acidburn0zzz/webm.libvpx,VTCSecureLLC/libvpx,kleopatra999/webm.libvpx,jdm/libvpx,stewnorriss/libvpx,kleopatra999/webm.libvpx,n4t/libvpx,thdav/aom,ShiftMediaProject/libvpx,stewnorriss/libvpx,Laknot/libvpx,n4t/libvpx,jdm/libvpx,lyx2014/libvpx_c,reimaginemedia/webm.libvpx,kim42083/webm.libvpx,mbebenita/aom,kleopatra999/webm.libvpx,kleopatra999/webm.libvpx,felipebetancur/libvpx,zofuthan/libvpx,VTCSecureLLC/libvpx,Acidburn0zzz/webm.libvpx,shareefalis/libvpx,stewnorriss/libvpx,reimaginemedia/webm.libvpx,GrokImageCompression/aom,Distrotech/libvpx,shacklettbp/aom,matanbs/vp982,GrokImageCompression/aom,shacklettbp/aom,shareefalis/libvpx,ittiamvpx/libvpx-1,kalli123/webm.libvpx,altogother/webm.libvpx,jmvalin/aom,openpeer/libvpx_new,hsueceumd/test_hui,hsueceumd/test_hui,jdm/libvpx,Distrotech/libvpx,VTCSecureLLC/libvpx,jacklicn/webm.libvpx,pcwalton/libvpx,luctrudeau/aom,thdav/aom,kalli123/webm.libvpx,kim42083/webm.libvpx,lyx2014/libvpx_c,abwiz0086/webm.libvpx,thdav/aom,smarter/aom,gshORTON/webm.libvpx,shyamalschandra/libvpx,Acidburn0zzz/webm.libvpx,iniwf/webm.libvpx,jacklicn/webm.libvpx,mbebenita/aom,Maria1099/webm.libvpx,jmvalin/aom,ittiamvpx/libvpx,smarter/aom,Maria1099/webm.libvpx,matanbs/webm.libvpx,stewnorriss/libvpx,Topopiccione/libvpx,Laknot/libvpx,Laknot/libvpx,mwgoldsmith/vpx,running770/libvpx,abwiz0086/webm.libvpx,matanbs/vp982,mwgoldsmith/vpx,openpeer/libvpx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