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/third_party/pulseaudio/src/modules/echo-cancel/
H A Dadrian-aec.c81 a->xfast = a->xslow = M80dB_PCM; in AEC_init()
122 // (dfast / xfast) / (dslow / xslow) is used to compute the stepsize
131 a->xfast += ALPHAFAST * (fabsf(x) - a->xfast); in AEC_dtd()
137 if (a->xfast < M70dB_PCM) { in AEC_dtd()
146 ratio = (a->dfast * a->xslow) / (a->dslow * a->xfast); in AEC_dtd()
161 // The xfast signal is used to charge the hangover timer to Thold. in AEC_leaky()
165 if (a->xfast >= M70dB_PCM) { in AEC_leaky()
H A Dadrian-aec.h305 REAL dfast, xfast; member

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