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/frameworks/av/media/libaaudio/examples/loopback/src/
DLoopbackAnalyzer.h890 double sinMean = mSinAccumulator / mFramesAccumulated; variable
892 double magnitude = 2.0 * sqrt( (sinMean * sinMean) + (cosMean * cosMean ));
895 double phase = M_PI_2 - atan2( sinMean, cosMean );