VP8LFastLog2Slow   75 3rdparty/libwebp/dsp/lossless.h extern float VP8LFastLog2Slow(int v);
VP8LFastLog2Slow   78 3rdparty/libwebp/dsp/lossless.h   return (v < LOG_LOOKUP_IDX_MAX) ? kLog2Table[v] : VP8LFastLog2Slow(v);