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/linux-4.19.296/drivers/isdn/mISDN/
Ddsp_dtmf.c126 s32 result[NCOEFF], tresh, treshl; in dsp_dtmf_goertzel_decode() local
248 treshl = tresh >> 3; /* tones which are not on, must be below 9 dB */ in dsp_dtmf_goertzel_decode()
251 if (result[i] < treshl) in dsp_dtmf_goertzel_decode()