I16HE16           336 third_party/libwebp/dsp/enc.c   HorizontalPred(I16HE16 + dst, left, 16);
I16HE16           419 third_party/libwebp/enc/quant.c const int VP8I16ModeOffsets[4] = { I16DC16, I16TM16, I16VE16, I16HE16 };