870 struct Dsp {  struct
871   AverageBlendFunc average_blend;
872   CdefDirectionFunc cdef_direction;
873   CdefFilteringFuncs cdef_filters;
874   CflIntraPredictorFuncs cfl_intra_predictors;
875   CflSubsamplerFuncs cfl_subsamplers;
876   ConvolveFuncs convolve;
877   ConvolveScaleFuncs convolve_scale;
878   DirectionalIntraPredictorZone1Func directional_intra_predictor_zone1;
879   DirectionalIntraPredictorZone2Func directional_intra_predictor_zone2;
880   DirectionalIntraPredictorZone3Func directional_intra_predictor_zone3;
881   DistanceWeightedBlendFunc distance_weighted_blend;
882   FilmGrainFuncs film_grain;
906 void DspInit();  argument
908 // Returns the appropriate Dsp table for |bitdepth| or nullptr if one doesn't  argument