/*----------------------------------------------------------------------------
; LOCAL STORE/BUFFER/POINTER DEFINITIONS
; Variable declaration - defined here and used outside this module
----------------------------------------------------------------------------*/
const int32 pretab[22] = {0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 2, 2, 3, 3, 3, 2, 0};
const int32 pow_2_1_fourth[4] =
{
Q30_fmt(1.0), Q30_fmt(1.18920711500272),
Q30_fmt(1.41421356237310), Q30_fmt(1.68179283050743)
};
const int32 two_cubic_roots[7] =
{
Q29_fmt(0), Q29_fmt(1.25992104989487),
Q29_fmt(1.58740105196820), Q29_fmt(2.00000000000000),
Q29_fmt(2.51984209978975), Q29_fmt(3.17480210393640),
Q29_fmt(3.99999999999999)
};
/*----------------------------------------------------------------------------
; EXTERNAL FUNCTION REFERENCES
; Declare functions defined elsewhere and referenced in this module
----------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------
; EXTERNAL GLOBAL STORE/BUFFER/POINTER REFERENCES
; Declare variables used in this module but defined elsewhere
----------------------------------------------------------------------------*/
void eight_ch_filtering(const Int32 *pQmfReal,
const Int32 *pQmfImag,
Int32 *mHybridReal,
Int32 *mHybridImag,
Int32 scratch_mem[])
{
Int32 real;
Int32 imag;
Int32 tmp1;
Int32 tmp2;
real = fxp_mul32_Q29(Q29_fmt(-0.06989827306334f), pQmfReal[ 4]);
real = fxp_mac32_Q31(real, Qfmt31(0.01055120626280f), pQmfReal[12]);
imag = fxp_mul32_Q29(Q29_fmt(-0.06989827306334f), pQmfImag[ 4]);
imag = fxp_mac32_Q31(imag, Qfmt31(0.01055120626280f), pQmfImag[12]);
mHybridReal[2] = (imag - real);
mHybridImag[2] = -(imag + real);
real = fxp_mul32_Q29(Q29_fmt(-0.07266113929591f), pQmfReal[ 3]);
real = fxp_mac32_Q31(real, Qfmt31(0.04540841899650f), pQmfReal[11]);
imag = fxp_mul32_Q29(Q29_fmt(-0.07266113929591f), pQmfImag[ 3]);
imag = fxp_mac32_Q31(imag, Qfmt31(0.04540841899650f), pQmfImag[11]);
tmp1 = fxp_mul32_Q29(Q29_fmt(-0.38268343236509f), real);
mHybridReal[3] = fxp_mac32_Q29(Q29_fmt(0.92387953251129f), imag, tmp1);
tmp2 = fxp_mul32_Q29(Q29_fmt(-0.92387953251129f), real);
mHybridImag[3] = fxp_mac32_Q29(Q29_fmt(-0.38268343236509f), imag, tmp2);
mHybridImag[4] = fxp_mul32_Q31(Qfmt31(0.09093731860946f), (pQmfReal[ 2] - pQmfReal[10]));
mHybridReal[4] = fxp_mul32_Q31(Qfmt31(0.09093731860946f), (pQmfImag[10] - pQmfImag[ 2]));
real = fxp_mul32_Q29(Q29_fmt(-0.02270420949825f), pQmfReal[ 1]);
real = fxp_mac32_Q31(real, Qfmt31(0.14532227859182f), pQmfReal[ 9]);
imag = fxp_mul32_Q29(Q29_fmt(-0.02270420949825f), pQmfImag[ 1]);
imag = fxp_mac32_Q31(imag, Qfmt31(0.14532227859182f), pQmfImag[ 9]);
tmp1 = fxp_mul32_Q29(Q29_fmt(0.92387953251129f), imag);
mHybridReal[5] = fxp_mac32_Q31(tmp1, Qfmt31(0.76536686473018f), real);
tmp2 = fxp_mul32_Q29(Q29_fmt(-0.92387953251129f), real);
mHybridImag[5] = fxp_mac32_Q31(tmp2, Qfmt31(0.76536686473018f), imag);
real = fxp_mul32_Q29(Q29_fmt(-0.00527560313140f), pQmfReal[ 0]);
real = fxp_mac32_Q31(real, Qfmt31(0.13979654612668f), pQmfReal[ 8]);
imag = fxp_mul32_Q29(Q29_fmt(-0.00527560313140f), pQmfImag[ 0]);
imag = fxp_mac32_Q31(imag, Qfmt31(0.13979654612668f), pQmfImag[ 8]);
mHybridReal[6] = (imag + real);
mHybridImag[6] = (imag - real);
tmp1 = fxp_mul32_Q31(Qfmt31(0.21791935610828f), pQmfReal[ 7]);
mHybridReal[7] = fxp_mac32_Q31(tmp1, Qfmt31(0.09026515280366f), pQmfImag[ 7]);
tmp2 = fxp_mul32_Q29(Q29_fmt(-0.04513257640183f), pQmfReal[ 7]);
mHybridImag[7] = fxp_mac32_Q31(tmp2, Qfmt31(0.21791935610828f), pQmfImag[ 7]);
mHybridReal[0] = pQmfReal[HYBRID_FILTER_DELAY] >> 3;
mHybridImag[0] = pQmfImag[HYBRID_FILTER_DELAY] >> 3;
tmp1 = fxp_mul32_Q29(Q29_fmt(-0.04513257640183f), pQmfImag[ 5]);
mHybridReal[1] = fxp_mac32_Q31(tmp1, Qfmt31(0.21791935610828f), pQmfReal[ 5]);
tmp2 = fxp_mul32_Q31(Qfmt31(0.21791935610828f), pQmfImag[ 5]);
mHybridImag[1] = fxp_mac32_Q31(tmp2, Qfmt31(0.09026515280366f), pQmfReal[ 5]);
/*
* 8*ifft
*/
ps_fft_rx8(mHybridReal, mHybridImag, scratch_mem);
}