question: private static void sbrQmfAnalysis ( FFT mdct , float in [ ] , float x [ ] , float z [ ] , float W [ ] [ ] [ ] [ ] , int bufIdx ) { System . arraycopy ( x , 1024 , x , 0 , 320 - 32 ) ; System . arraycopy ( in , 0 , x , 288 , 1024 ) ; int xOffset = 0 ; for ( int i = 0 ; i < 32 ; i ++ ) { FloatDSP . vectorFmulReverse ( z , 0 , AacSbrData . sbr_qmf_window_ds , 0 , x , xOffset , 320 ) ; SBRDSP . sum64x5 ( z , 0 ) ; SBRDSP . qmfPreShuffle ( z , 0 ) ; mdct . imdctHalf ( z , 0 , z , 64 ) ; SBRDSP . qmfPostShuffle ( W [ bufIdx ] [ i ] , z , 0 ) ; xOffset += 32 ; } }
target:  Analysis QMF Bank (14496-3 sp04 p206)