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#define EOS_I2S_FMT_PCM16 0 #define EOS_I2S_FMT_ALAW 1 #define EOS_I2S_MODE_STEREO 0 #define EOS_I2S_MODE_MONO 1 #define EOS_I2S_ETYPE_MIC 1 #define EOS_I2S_ETYPE_SPK 2