support wav file input

haoneng.lhn

2023-04-28 dcc4053d3e25ff3962e9a8236a26ef69ae4c4827

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add_library(csrc STATIC
        feature-fbank.cc
        feature-functions.cc
        feature-window.cc
        fftsg.c
        mel-computations.cc
        online-feature.cc
        rfft.cc)