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Diffstat (limited to 'libSBRenc/src/psenc_hybrid.cpp')
| -rw-r--r-- | libSBRenc/src/psenc_hybrid.cpp | 836 |
1 files changed, 0 insertions, 836 deletions
diff --git a/libSBRenc/src/psenc_hybrid.cpp b/libSBRenc/src/psenc_hybrid.cpp deleted file mode 100644 index a314678..0000000 --- a/libSBRenc/src/psenc_hybrid.cpp +++ /dev/null @@ -1,836 +0,0 @@ -/***************************** MPEG Audio Encoder *************************** - - (C) Copyright Fraunhofer IIS (2004-2005) - All Rights Reserved - - Please be advised that this software and/or program delivery is - Confidential Information of Fraunhofer and subject to and covered by the - - Fraunhofer IIS Software Evaluation Agreement - between Google Inc. and Fraunhofer - effective and in full force since March 1, 2012. - - You may use this software and/or program only under the terms and - conditions described in the above mentioned Fraunhofer IIS Software - Evaluation Agreement. Any other and/or further use requires a separate agreement. - - - $Id$ - Initial author: M. Neuendorf, M. Multrus - contents/description: hybrid analysis filter bank - - This software and/or program is protected by copyright law and international - treaties. Any reproduction or distribution of this software and/or program, - or any portion of it, may result in severe civil and criminal penalties, and - will be prosecuted to the maximum extent possible under law. - -******************************************************************************/ - -#include "psenc_hybrid.h" - - -/* Includes ******************************************************************/ - -#include "psenc_hybrid.h" -#include "sbr_ram.h" - -#include "fft.h" - -#include "genericStds.h" - -/* Defines *******************************************************************/ - -#define HYBRID_SCALE 4 - -/*//#define FAST_FILTER2 -#define FAST_FILTER4 -#define FAST_FILTER8 -#define FAST_FILTER12 -*/ -#define HYBRID_INVERSE_ORDER ( 0x0F000000 ) -#define HYBRID_INVERSE_MASK ( ~HYBRID_INVERSE_ORDER ) - -//#define REAL ( 0 ) -//#define CPLX ( 1 ) - -#define cos0Pi FL2FXCONST_DBL( 1.f) -#define sin0Pi FL2FXCONST_DBL( 0.f) -#define cos1Pi FL2FXCONST_DBL(-1.f) -#define sin1Pi FL2FXCONST_DBL( 0.f) -#define cos1Pi_2 FL2FXCONST_DBL( 0.f) -#define sin1Pi_2 FL2FXCONST_DBL( 1.f) -#define cos1Pi_3 FL2FXCONST_DBL( 0.5f) -#define sin1Pi_3 FL2FXCONST_DBL( 0.86602540378444f) - -#define cos0Pi_4 cos0Pi -#define cos1Pi_4 FL2FXCONST_DBL(0.70710678118655f) -#define cos2Pi_4 cos1Pi_2 -#define cos3Pi_4 (-cos1Pi_4) -#define cos4Pi_4 (-cos0Pi_4) -#define cos5Pi_4 cos3Pi_4 -#define cos6Pi_4 cos2Pi_4 - -#define sin0Pi_4 sin0Pi -#define sin1Pi_4 FL2FXCONST_DBL(0.70710678118655f) -#define sin2Pi_4 sin1Pi_2 -#define sin3Pi_4 sin1Pi_4 -#define sin4Pi_4 sin0Pi_4 -#define sin5Pi_4 (-sin3Pi_4) -#define sin6Pi_4 (-sin2Pi_4) - -#define cos0Pi_8 cos0Pi -#define cos1Pi_8 FL2FXCONST_DBL(0.92387953251129f) -#define cos2Pi_8 cos1Pi_4 -#define cos3Pi_8 FL2FXCONST_DBL(0.38268343236509f) -#define cos4Pi_8 cos2Pi_4 -#define cos5Pi_8 (-cos3Pi_8) -#define cos6Pi_8 (-cos2Pi_8) - -#define sin0Pi_8 sin0Pi -#define sin1Pi_8 cos3Pi_8 -#define sin2Pi_8 sin1Pi_4 -#define sin3Pi_8 cos1Pi_8 -#define sin4Pi_8 sin2Pi_4 -#define sin5Pi_8 sin3Pi_8 -#define sin6Pi_8 sin1Pi_4 - -#define cos0Pi_12 cos0Pi -#define cos1Pi_12 FL2FXCONST_DBL(0.96592582628906f) -#define cos2Pi_12 FL2FXCONST_DBL(0.86602540378444f) -#define cos3Pi_12 cos1Pi_4 -#define cos4Pi_12 cos1Pi_3 -#define cos5Pi_12 FL2FXCONST_DBL(0.25881904510252f) -#define cos6Pi_12 cos1Pi_2 - -#define sin0Pi_12 sin0Pi -#define sin1Pi_12 cos5Pi_12 -#define sin2Pi_12 cos4Pi_12 -#define sin3Pi_12 sin1Pi_4 -#define sin4Pi_12 sin1Pi_3 -#define sin5Pi_12 cos1Pi_12 -#define sin6Pi_12 sin1Pi_2 - -#define FFT_IDX_R(a) (2*a) -#define FFT_IDX_I(a) (2*a+1) - - -/* Constants *****************************************************************/ - -/* static const UINT noQmfBandsInHybrid34 = 5; */ - -static const INT aHybridResolution10[] = { HYBRID_6_CPLX, - HYBRID_2_REAL | HYBRID_INVERSE_ORDER, - HYBRID_2_REAL }; - -static const INT aHybridResolution20[] = { HYBRID_6_CPLX, - HYBRID_2_REAL | HYBRID_INVERSE_ORDER, - HYBRID_2_REAL }; - -/*static const INT aHybridResolution34[] = { HYBRID_12_CPLX, - HYBRID_8_CPLX, - HYBRID_4_CPLX, - HYBRID_4_CPLX, - HYBRID_4_CPLX };*/ - -static const FIXP_DBL p8_13_20[HYBRID_FILTER_LENGTH] = -{ - FL2FXCONST_DBL(0.00746082949812f), FL2FXCONST_DBL(0.02270420949825f), FL2FXCONST_DBL(0.04546865930473f), FL2FXCONST_DBL(0.07266113929591f), - FL2FXCONST_DBL(0.09885108575264f), FL2FXCONST_DBL(0.11793710567217f), FL2FXCONST_DBL(0.125f ), FL2FXCONST_DBL(0.11793710567217f), - FL2FXCONST_DBL(0.09885108575264f), FL2FXCONST_DBL(0.07266113929591f), FL2FXCONST_DBL(0.04546865930473f), FL2FXCONST_DBL(0.02270420949825f), - FL2FXCONST_DBL(0.00746082949812f) -}; - -static const FIXP_DBL p2_13_20[HYBRID_FILTER_LENGTH] = -{ - FL2FXCONST_DBL(0.0f), FL2FXCONST_DBL( 0.01899487526049f), FL2FXCONST_DBL(0.0f), FL2FXCONST_DBL(-0.07293139167538f), - FL2FXCONST_DBL(0.0f), FL2FXCONST_DBL( 0.30596630545168f), FL2FXCONST_DBL(0.5f), FL2FXCONST_DBL( 0.30596630545168f), - FL2FXCONST_DBL(0.0f), FL2FXCONST_DBL(-0.07293139167538f), FL2FXCONST_DBL(0.0f), FL2FXCONST_DBL( 0.01899487526049f), - FL2FXCONST_DBL(0.0f) -}; - - -/*static const float p12_13_34[HYBRID_FILTER_LENGTH] = -{ - 0.04081179924692, 0.03812810994926, 0.05144908135699, 0.06399831151592, - 0.07428313801106, 0.08100347892914, 0.08333333333333, 0.08100347892914, - 0.07428313801106, 0.06399831151592, 0.05144908135699, 0.03812810994926, - 0.04081179924692 -}; - -static const float p8_13_34[HYBRID_FILTER_LENGTH] = -{ - 0.01565675600122, 0.03752716391991, 0.05417891378782, 0.08417044116767, - 0.10307344158036, 0.12222452249753, 0.12500000000000, 0.12222452249753, - 0.10307344158036, 0.08417044116767, 0.05417891378782, 0.03752716391991, - 0.01565675600122 -}; - -static const float p4_13_34[HYBRID_FILTER_LENGTH] = -{ - -0.05908211155639, -0.04871498374946, 0.0, 0.07778723915851, - 0.16486303567403, 0.23279856662996, 0.25, 0.23279856662996, - 0.16486303567403, 0.07778723915851, 0.0, -0.04871498374946, - -0.05908211155639 -};*/ - - -/* Function / Class Implementation *******************************************/ - - - -/*****************************************************************************/ -/* **** FILTERBANK CONFIG **** */ - -HANDLE_ERROR_INFO FDKsbrEnc_CreateHybridConfig(HANDLE_PS_HYBRID_CONFIG *phHybConfig, - PS_BANDS mode) -{ - HANDLE_ERROR_INFO error = noError; - HANDLE_PS_HYBRID_CONFIG h = NULL; - UINT k = 0; - - if (error == noError) { - h = *phHybConfig; /* Simplify your life */ - h->mode = mode; - - switch (mode) { - case PS_BANDS_MID: - h->noQmfBandsInHybrid = NO_QMF_BANDS_HYBRID_20; - for (k=0; k<h->noQmfBandsInHybrid; k++) { - h->aHybridResolution[k] = aHybridResolution20[k]; - } - break; - - case PS_BANDS_FINE: - /*h->noQmfBandsInHybrid = noQmfBandsInHybrid34; - for (k=0; k<h->noQmfBandsInHybrid; k++) { - h->aHybridResolution[k] = aHybridResolution34[k]; - }*/ - FDK_ASSERT(0); /* we don't support! */ - break; - - case PS_BANDS_COARSE: - h->noQmfBandsInHybrid = NO_QMF_BANDS_HYBRID_10; - for (k=0; k<h->noQmfBandsInHybrid; k++) { - h->aHybridResolution[k] = aHybridResolution10[k]; - } - break; - - default: - error = ERROR(CDI, "Invalid hybrid filter bank configuration."); - break; - } - } - - return error; -} - -/*****************************************************************************/ -/* **** FILTERBANK DATA **** */ - -HANDLE_ERROR_INFO FDKsbrEnc_CreateHybridData(HANDLE_PS_HYBRID_DATA *phHybData, - INT ch) -{ - HANDLE_ERROR_INFO error = noError; - int k; - - HANDLE_PS_HYBRID_DATA hHybData = GetRam_HybData(ch); - if (hHybData==NULL) { - error = 1; - goto bail; - } - - FDKmemclear(hHybData, sizeof(PS_HYBRID_DATA)); - - hHybData->rHybData[0] = GetRam_PsRhyb(ch); - hHybData->iHybData[0] = GetRam_PsIhyb(ch); - if ( (hHybData->rHybData[0]==NULL) || (hHybData->iHybData[0]==NULL) ) { - error = 1; - goto bail; - } - - - - for (k=1; k<(HYBRID_FRAMESIZE+HYBRID_WRITEOFFSET); k++) { - hHybData->rHybData[k] = hHybData->rHybData[0] + (k*HYBRID_NUM_BANDS); - hHybData->iHybData[k] = hHybData->iHybData[0] + (k*HYBRID_NUM_BANDS); - } - -bail: - *phHybData = hHybData; - return error; -} - - -HANDLE_ERROR_INFO FDKsbrEnc_InitHybridData(HANDLE_PS_HYBRID_DATA hHybData, - HANDLE_PS_HYBRID_CONFIG hHybConfig, - INT frameSize) -{ - HANDLE_ERROR_INFO error = noError; - INT nHybridBands = 0; - INT k = 0; - INT noBands = 0; - const INT *hybridRes = NULL; - - if (hHybConfig != NULL) { - noBands = hHybConfig->noQmfBandsInHybrid; - hybridRes = hHybConfig->aHybridResolution; - } - - for (k=0; k<noBands; k++) { - nHybridBands += (hybridRes[k] & HYBRID_INVERSE_MASK); - } - FDK_ASSERT (HYBRID_NUM_BANDS>=nHybridBands); - - hHybData->hybDataReadOffset = HYBRID_DATA_READ_OFFSET; - hHybData->hybDataWriteOffset = HYBRID_WRITEOFFSET; - - for (k=0; k<(HYBRID_FRAMESIZE+HYBRID_WRITEOFFSET); k++) { - FDKmemclear(hHybData->rHybData[k], sizeof(FIXP_QMF)*HYBRID_NUM_BANDS); - FDKmemclear(hHybData->iHybData[k], sizeof(FIXP_QMF)*HYBRID_NUM_BANDS); - } - - hHybData->frameSize = frameSize; - hHybData->nHybridBands = nHybridBands; - hHybData->nHybridQmfBands = noBands; - - /* store hybrid resoltion in hybrid data handle */ - FDK_ASSERT (HYBRID_MAX_QMF_BANDS>=hHybData->nHybridQmfBands); - for(k = 0; k<hHybData->nHybridQmfBands; k++){ - hHybData->nHybridResolution[k] = (hybridRes[k] & HYBRID_INVERSE_MASK); - } - - return error; -} - -HANDLE_ERROR_INFO FDKsbrEnc_DestroyHybridData(HANDLE_PS_HYBRID_DATA* phHybData) -{ - HANDLE_PS_HYBRID_DATA hHybData = *phHybData; - - if (hHybData!=NULL) { - FreeRam_PsRhyb(&hHybData->rHybData[0]); - FreeRam_PsIhyb(&hHybData->iHybData[0]); - FreeRam_HybData(phHybData); - } - - return noError; -} - -/*** Access functions ***/ - -/* return hybrid band resolution of qmf band 'qmfBand' */ -INT FDKsbrEnc_GetHybridResolution(HANDLE_PS_HYBRID_DATA h, INT qmfBand){ - - INT nHybridResolution = 0; - - if(h->nHybridResolution){ - nHybridResolution = h->nHybridResolution[qmfBand]; - } - - return nHybridResolution; -} - -/*****************************************************************************/ -/* **** FILTERBANK **** */ - -/* - 2 channel filter - Filter Coefs: - 0.0, - 0.01899487526049, - 0.0, - -0.07293139167538, - 0.0, - 0.30596630545168, - 0.5, - 0.30596630545168, - 0.0, - -0.07293139167538, - 0.0, - 0.01899487526049, - 0.0 - - - Filter design: - h[q,n] = g[n] * cos(2pi/2 * q * (n-6) ); n = 0..12, q = 0,1; - - -> h[0,n] = g[n] * 1; - -> h[1,n] = g[n] * pow(-1,n); - -*/ - -static void dualChannelFiltering(const FIXP_QMF *RESTRICT pQmfReal, - const FIXP_QMF *RESTRICT pQmfImag, - FIXP_QMF **RESTRICT mHybridReal, - FIXP_QMF **RESTRICT mHybridImag, - INT nSamples) -{ - INT i; - - for(i = 0; i < nSamples; i++) { - FIXP_DBL r1, r3, r5, r6; - FIXP_DBL i1, i3, i5, i6; - - /* symmetric filter coefficients - scaleValue same as used in eightChannelFiltering (HYBRID_SCALE = 4) - */ - r1 = fMultDiv2(p2_13_20[1], (FIXP_QMF)((pQmfReal[1+i]>>1) + (pQmfReal[11+i]>>1)) ) >> 2; - r3 = fMultDiv2(p2_13_20[3], (FIXP_QMF)((pQmfReal[3+i]>>1) + (pQmfReal[ 9+i]>>1)) ) >> 2; - r5 = fMultDiv2(p2_13_20[5], (FIXP_QMF)((pQmfReal[5+i]>>1) + (pQmfReal[ 7+i]>>1)) ) >> 2; - r6 = fMultDiv2(p2_13_20[6], (FIXP_QMF) (pQmfReal[6+i]>>1) ) >> 2; - - i1 = fMultDiv2(p2_13_20[1], (FIXP_QMF)((pQmfImag[1+i]>>1) + (pQmfImag[11+i]>>1)) ) >> 2; - i3 = fMultDiv2(p2_13_20[3], (FIXP_QMF)((pQmfImag[3+i]>>1) + (pQmfImag[ 9+i]>>1)) ) >> 2; - i5 = fMultDiv2(p2_13_20[5], (FIXP_QMF)((pQmfImag[5+i]>>1) + (pQmfImag[ 7+i]>>1)) ) >> 2; - i6 = fMultDiv2(p2_13_20[6], (FIXP_QMF) (pQmfImag[6+i]>>1) ) >> 2; - - mHybridReal[i][0] = FX_DBL2FX_QMF(r1 + r3 + r5 + r6); - mHybridImag[i][0] = FX_DBL2FX_QMF(i1 + i3 + i5 + i6); - - mHybridReal[i][1] = FX_DBL2FX_QMF(- r1 - r3 - r5 + r6); - mHybridImag[i][1] = FX_DBL2FX_QMF(- i1 - i3 - i5 + i6); - } -} - -/* - 8 channel filter - - Implementation using a FFT of length 8 - - prototype filter coefficients: - 0.00746082949812 0.02270420949825 0.04546865930473 0.07266113929591 0.09885108575264 0.11793710567217 - 0.125 - 0.11793710567217 0.09885108575264 0.07266113929591 0.04546865930473 0.02270420949825 0.00746082949812 - - Filter design: - N = 13; Q = 8; - h[q,n] = g[n] * exp(j * 2 * pi / Q * (q + .5) * (n - 6)); n = 0..(N-1), q = 0..(Q-1); - - Time Signal: x[t]; - Filter Bank Output - y[q,t] = conv(x[t],h[q,t]) = conv(h[q,t],x[t]) = sum(x[k] * h[q, t - k] ) = sum(h[q, k] * x[t - k] ); k = 0..(N-1); - - y[q,t] = x[t - 12]*h[q, 12] + x[t - 11]*h[q, 11] + x[t - 10]*h[q, 10] + x[t - 9]*h[q, 9] - + x[t - 8]*h[q, 8] + x[t - 7]*h[q, 7] - + x[t - 6]*h[q, 6] - + x[t - 5]*h[q, 5] + x[t - 4]*h[q, 4] - + x[t - 3]*h[q, 3] + x[t - 2]*h[q, 2] + x[t - 1]*h[q, 1] + x[t - 0]*h[q, 0]; - - h'[q, n] = h[q,(N-1)-n] = g[n] * exp(j * 2 * pi / Q * (q + .5) * (6 - n)); n = 0..(N-1), q = 0..(Q-1); - - y[q,t] = x[t - 12]*h'[q, 0] + x[t - 11]*h'[q, 1] + x[t - 10]*h'[q, 2] + x[t - 9]*h'[q, 3] - + x[t - 8]*h'[q, 4] + x[t - 7]*h'[q, 5] - + x[t - 6]*h'[q, 6] - + x[t - 5]*h'[q, 7] + x[t - 4]*h'[q, 8] - + x[t - 3]*h'[q, 9] + x[t - 2]*h'[q, 10] + x[t - 1]*h'[q, 11] + x[t - 0]*h'[q, 12]; - - Try to split off FFT Modulation Term: - FFT(x[t], q) = sum(x[t+k]*exp(-j*2*pi/N *q * k)) - c m - Step 1: h'[q,n] = g[n] * ( exp(j * 2 * pi / 8 * .5 * (6 - n)) ) * ( exp (j * 2 * pi / 8 * q * (6 - n)) ); - - h'[q,n] = g[n] *c[n] * m[q,n]; (see above) - c[n] = exp( j * 2 * pi / 8 * .5 * (6 - n) ); - m[q,n] = exp( j * 2 * pi / 8 * q * (6 - n) ); - - y[q,t] = x[t - 0]*g[0]*c[0]*m[q,0] + x[t - 1]*g[1]*c[ 1]*m[q, 1] + ... - ... + x[t - 12]*g[2]*c[12]*m[q,12]; - - | - n m *exp(-j*2*pi) | n' fft -------------------------------------------------------------------------------------------------------------------------- - 0 exp( j * 2 * pi / 8 * q * 6) -> exp(-j * 2 * pi / 8 * q * 2) | 2 exp(-j * 2 * pi / 8 * q * 0) - 1 exp( j * 2 * pi / 8 * q * 5) -> exp(-j * 2 * pi / 8 * q * 3) | 3 exp(-j * 2 * pi / 8 * q * 1) - 2 exp( j * 2 * pi / 8 * q * 4) -> exp(-j * 2 * pi / 8 * q * 4) | 4 exp(-j * 2 * pi / 8 * q * 2) - 3 exp( j * 2 * pi / 8 * q * 3) -> exp(-j * 2 * pi / 8 * q * 5) | 5 exp(-j * 2 * pi / 8 * q * 3) - 4 exp( j * 2 * pi / 8 * q * 2) -> exp(-j * 2 * pi / 8 * q * 6) | 6 exp(-j * 2 * pi / 8 * q * 4) - 5 exp( j * 2 * pi / 8 * q * 1) -> exp(-j * 2 * pi / 8 * q * 7) | 7 exp(-j * 2 * pi / 8 * q * 5) - 6 exp( j * 2 * pi / 8 * q * 0) | 0 exp(-j * 2 * pi / 8 * q * 6) - 7 exp(-j * 2 * pi / 8 * q * 1) | 1 exp(-j * 2 * pi / 8 * q * 7) - 8 exp(-j * 2 * pi / 8 * q * 2) | 2 - 9 exp(-j * 2 * pi / 8 * q * 3) | 3 - 10 exp(-j * 2 * pi / 8 * q * 4) | 4 - 11 exp(-j * 2 * pi / 8 * q * 5) | 5 - 12 exp(-j * 2 * pi / 8 * q * 6) | 6 - - - now use fft modulation coefficients - m[6] = = fft[0] - m[7] = = fft[1] - m[8] = m[ 0] = fft[2] - m[9] = m[ 1] = fft[3] - m[10] = m[ 2] = fft[4] - m[11] = m[ 3] = fft[5] - m[12] = m[ 4] = fft[6] - m[ 5] = fft[7] - - y[q,t] = ( x[t- 6]*g[ 6]*c[ 6] ) * fft[q,0] + - ( x[t- 7]*g[ 7]*c[ 7] ) * fft[q,1] + - ( x[t- 0]*g[ 0]*c[ 0] + x[t- 8]*g[ 8]*c[ 8] ) * fft[q,2] + - ( x[t- 1]*g[ 1]*c[ 1] + x[t- 9]*g[ 9]*c[ 9] ) * fft[q,3] + - ( x[t- 2]*g[ 2]*c[ 2] + x[t-10]*g[10]*c[10] ) * fft[q,4] + - ( x[t- 3]*g[ 3]*c[ 3] + x[t-11]*g[11]*c[11] ) * fft[q,5] + - ( x[t- 4]*g[ 4]*c[ 4] + x[t-12]*g[12]*c[12] ) * fft[q,6] + - ( x[t- 5]*g[ 5]*c[ 5] ) * fft[q,7]; - - pre twiddle factors c[n] = exp(j * 2 * pi / 8 * .5 * (6 - n)); - n c] | n c[n] | n c[n] ---------------------------------------------------------------------------------------------------- - 0 exp( j * 6 * pi / 8) | 1 exp( j * 5 * pi / 8) | 2 exp( j * 4 * pi / 8) - 3 exp( j * 3 * pi / 8) | 4 exp( j * 2 * pi / 8) | 5 exp( j * 1 * pi / 8) - 6 exp( j * 0 * pi / 8) | 7 exp(-j * 1 * pi / 8) | 8 exp(-j * 2 * pi / 8) - 9 exp(-j * 3 * pi / 8) | 10 exp(-j * 4 * pi / 8) | 11 exp(-j * 5 * pi / 8) - 12 exp(-j * 6 * pi / 8) | | - -*/ - -static const FIXP_DBL cr[13] = -{ cos6Pi_8, cos5Pi_8, cos4Pi_8, - cos3Pi_8, cos2Pi_8, cos1Pi_8, - cos0Pi_8, - cos1Pi_8, cos2Pi_8, cos3Pi_8, - cos4Pi_8, cos5Pi_8, cos6Pi_8 -}; - -static const FIXP_DBL ci[13] = -{ - sin6Pi_8, sin5Pi_8, sin4Pi_8, - sin3Pi_8, sin2Pi_8, sin1Pi_8, - sin0Pi_8, - -sin1Pi_8, -sin2Pi_8, -sin3Pi_8, - -sin4Pi_8, -sin5Pi_8, -sin6Pi_8 -}; - - -static void eightChannelFiltering(const FIXP_QMF *pQmfReal, - const FIXP_QMF *pQmfImag, - FIXP_DBL *fft, - FIXP_QMF **mHybridReal, - FIXP_QMF **mHybridImag, - INT nSamples, - const FIXP_DBL *p) -{ - INT i, bin; - for(i = 0; i < nSamples; i++) { - /* pre twiddeling - scaling 4 = 2 (fMultDiv2) + 2 (dit_fft) scaling (HYBRID_SCALE = 4) - */ - fft[FFT_IDX_R(0)] = fMultDiv2(p[6], fMultSubDiv2(fMultDiv2(cr[6], pQmfReal[6+i]), ci[6], pQmfImag[6+i])); - fft[FFT_IDX_I(0)] = fMultDiv2(p[6], fMultAddDiv2(fMultDiv2(ci[6], pQmfReal[6+i]), cr[6], pQmfImag[6+i])); - - fft[FFT_IDX_R(1)] = fMultDiv2(p[7], fMultSubDiv2(fMultDiv2(cr[7], pQmfReal[7+i]), ci[7], pQmfImag[7+i])); - fft[FFT_IDX_I(1)] = fMultDiv2(p[7], fMultAddDiv2(fMultDiv2(ci[7], pQmfReal[7+i]), cr[7], pQmfImag[7+i])); - - fft[FFT_IDX_R(2)] = ( fMultDiv2(p[ 0], fMultSubDiv2(fMultDiv2(cr[0], pQmfReal[ 0+i]), ci[0], pQmfImag[ 0+i]))+ - fMultDiv2(p[ 8], fMultSubDiv2(fMultDiv2(cr[8], pQmfReal[ 8+i]), ci[8], pQmfImag[ 8+i])) ); - fft[FFT_IDX_I(2)] = ( fMultDiv2(p[ 0], fMultAddDiv2(fMultDiv2(ci[0], pQmfReal[ 0+i]), cr[0], pQmfImag[ 0+i]))+ - fMultDiv2(p[ 8], fMultAddDiv2(fMultDiv2(ci[8], pQmfReal[ 8+i]), cr[8], pQmfImag[ 8+i])) ); - - fft[FFT_IDX_R(3)] = ( fMultDiv2(p[ 1], fMultSubDiv2(fMultDiv2(cr[1], pQmfReal[ 1+i]), ci[1], pQmfImag[ 1+i]))+ - fMultDiv2(p[ 9], fMultSubDiv2(fMultDiv2(cr[9], pQmfReal[ 9+i]), ci[9], pQmfImag[ 9+i])) ); - fft[FFT_IDX_I(3)] = ( fMultDiv2(p[ 1], fMultAddDiv2(fMultDiv2(ci[1], pQmfReal[ 1+i]), cr[1], pQmfImag[ 1+i]))+ - fMultDiv2(p[ 9], fMultAddDiv2(fMultDiv2(ci[9], pQmfReal[ 9+i]), cr[9], pQmfImag[ 9+i])) ); - - fft[FFT_IDX_R(4)] = ( fMultDiv2(p[ 2], fMultSubDiv2( fMultDiv2(cr[2], pQmfReal[ 2+i]), ci[2], pQmfImag[ 2+i]))+ - fMultDiv2(p[10], fMultSubDiv2(fMultDiv2(cr[10], pQmfReal[10+i]), ci[10], pQmfImag[10+i])) ); - fft[FFT_IDX_I(4)] = ( fMultDiv2(p[ 2], fMultAddDiv2( fMultDiv2(ci[2], pQmfReal[ 2+i]), cr[2], pQmfImag[ 2+i]))+ - fMultDiv2(p[10], fMultAddDiv2(fMultDiv2(ci[10], pQmfReal[10+i]), cr[10], pQmfImag[10+i])) ); - - fft[FFT_IDX_R(5)] = ( fMultDiv2(p[ 3], fMultSubDiv2( fMultDiv2(cr[3], pQmfReal[ 3+i]), ci[3], pQmfImag[ 3+i]))+ - fMultDiv2(p[11], fMultSubDiv2(fMultDiv2(cr[11], pQmfReal[11+i]), ci[11], pQmfImag[11+i])) ); - fft[FFT_IDX_I(5)] = ( fMultDiv2(p[ 3], fMultAddDiv2( fMultDiv2(ci[3], pQmfReal[ 3+i]), cr[3], pQmfImag[ 3+i]))+ - fMultDiv2(p[11], fMultAddDiv2(fMultDiv2(ci[11], pQmfReal[11+i]), cr[11], pQmfImag[11+i])) ); - - fft[FFT_IDX_R(6)] = ( fMultDiv2(p[ 4], fMultSubDiv2( fMultDiv2(cr[4], pQmfReal[ 4+i]), ci[4], pQmfImag[ 4+i]))+ - fMultDiv2(p[12], fMultSubDiv2(fMultDiv2(cr[12], pQmfReal[12+i]), ci[12], pQmfImag[12+i])) ); - fft[FFT_IDX_I(6)] = ( fMultDiv2(p[ 4], fMultAddDiv2( fMultDiv2(ci[4], pQmfReal[ 4+i]), cr[4], pQmfImag[ 4+i]))+ - fMultDiv2(p[12], fMultAddDiv2(fMultDiv2(ci[12], pQmfReal[12+i]), cr[12], pQmfImag[12+i])) ); - - fft[FFT_IDX_R(7)] = fMultDiv2(p[5], fMultSubDiv2(fMultDiv2(cr[5], pQmfReal[5+i]), ci[5], pQmfImag[5+i])); - fft[FFT_IDX_I(7)] = fMultDiv2(p[5], fMultAddDiv2(fMultDiv2(ci[5], pQmfReal[5+i]), cr[5], pQmfImag[5+i])); - - /* fft modulation */ - fft_8(fft); - - /* resort fft data INTo output array*/ - for(bin=0; bin<8;bin++ ) { - mHybridReal[i][bin] = FX_DBL2FX_QMF(fft[FFT_IDX_R(bin)]); - mHybridImag[i][bin] = FX_DBL2FX_QMF(fft[FFT_IDX_I(bin)]); - } - } -} - -/**************************************************************************//** -HybridAnalysis -******************************************************************************/ - -HANDLE_ERROR_INFO -HybridAnalysis ( HANDLE_PS_HYBRID hHybrid, /*!< Handle to HYBRID struct. */ - FIXP_QMF *const *const mQmfReal, /*!< The real part of the QMF-matrix. */ - FIXP_QMF *const *const mQmfImag, /*!< The imaginary part of the QMF-matrix. */ - SCHAR sf_fixpQmf, /*!< Qmf scale factor */ - FIXP_QMF **mHybridReal, /*!< The real part of the hybrid-matrix. */ - FIXP_QMF **mHybridImag, /*!< The imaginary part of the hybrid-matrix. */ - SCHAR *sf_fixpHybrid) /*!< Hybrid scale factor */ -{ - HANDLE_ERROR_INFO error = noError; - INT n, band; - INT hybridRes; - INT chOffset = 0; - /* INT usedStereoBands = hHybrid->mode; */ /*!< indicates which 8 band filter to use */ - INT frameSize = hHybrid->frameSize; - INT hybridFilterDelay = hHybrid->hybridFilterDelay; - - for(band = 0; band < hHybrid->nQmfBands; band++) { /* loop all qmf bands */ - - if(error == noError){ - hybridRes = hHybrid->pResolution[band]; - - /* Create working buffer. */ - /* Copy stored samples to working buffer. */ - FDKmemcpy(hHybrid->pWorkReal, hHybrid->mQmfBufferReal[band], - hHybrid->qmfBufferMove * sizeof(FIXP_QMF)); - FDKmemcpy(hHybrid->pWorkImag, hHybrid->mQmfBufferImag[band], - hHybrid->qmfBufferMove * sizeof(FIXP_QMF)); - - /* Append new samples to working buffer. */ - for(n = 0; n < frameSize; n++) { - hHybrid->pWorkReal [hHybrid->qmfBufferMove + n] = mQmfReal [n + hybridFilterDelay] [band]; - hHybrid->pWorkImag [hHybrid->qmfBufferMove + n] = mQmfImag [n + hybridFilterDelay] [band]; - } - - /* Store samples for next frame. */ - FDKmemcpy(hHybrid->mQmfBufferReal[band], hHybrid->pWorkReal + frameSize, - hHybrid->qmfBufferMove * sizeof(FIXP_QMF)); - FDKmemcpy(hHybrid->mQmfBufferImag[band], hHybrid->pWorkImag + frameSize, - hHybrid->qmfBufferMove * sizeof(FIXP_QMF)); - - - switch(hybridRes) { - case HYBRID_2_REAL: - dualChannelFiltering( hHybrid->pWorkReal, - hHybrid->pWorkImag, - hHybrid->mTempReal, - hHybrid->mTempImag, - frameSize); - - /* copy data to output buffer */ - for(n = 0; n < frameSize; n++) { - FDKmemcpy(&mHybridReal[n][chOffset], hHybrid->mTempReal[n], - (INT)(hybridRes & HYBRID_INVERSE_MASK)*sizeof(FIXP_QMF)); - FDKmemcpy(&mHybridImag[n][chOffset], hHybrid->mTempImag[n], - (INT)(hybridRes & HYBRID_INVERSE_MASK)*sizeof(FIXP_QMF)); - } - break; - - case HYBRID_2_REAL | HYBRID_INVERSE_ORDER: - dualChannelFiltering( hHybrid->pWorkReal, - hHybrid->pWorkImag, - hHybrid->mTempReal, - hHybrid->mTempImag, - frameSize); - - /* copy and resort data */ - for ( n = 0; n < frameSize; n++ ) - { - mHybridReal[n][chOffset + 0] = hHybrid->mTempReal[n][1] ; - mHybridReal[n][chOffset + 1] = hHybrid->mTempReal[n][0] ; - mHybridImag[n][chOffset + 0] = hHybrid->mTempImag[n][1] ; - mHybridImag[n][chOffset + 1] = hHybrid->mTempImag[n][0] ; - } - break; - - case HYBRID_6_CPLX: - eightChannelFiltering( hHybrid->pWorkReal, - hHybrid->pWorkImag, - hHybrid->fft, - hHybrid->mTempReal, - hHybrid->mTempImag, - frameSize, - /*(usedStereoBands==PS_BANDS_FINE)?p8_13_34:*/p8_13_20); - - /* do the shuffle */ - for ( n = 0; n < frameSize; n++ ) - { - /* add data ... */ - hHybrid->mTempReal[n][2] += hHybrid->mTempReal[n][5]; - hHybrid->mTempImag[n][2] += hHybrid->mTempImag[n][5]; - hHybrid->mTempReal[n][3] += hHybrid->mTempReal[n][4]; - hHybrid->mTempImag[n][3] += hHybrid->mTempImag[n][4]; - - /* shuffle and copy to output buffer */ - mHybridReal[n][chOffset + 0] = hHybrid->mTempReal[n][6] ; - mHybridReal[n][chOffset + 1] = hHybrid->mTempReal[n][7] ; - mHybridReal[n][chOffset + 2] = hHybrid->mTempReal[n][0] ; - mHybridReal[n][chOffset + 3] = hHybrid->mTempReal[n][1] ; - mHybridReal[n][chOffset + 4] = hHybrid->mTempReal[n][2] ; - mHybridReal[n][chOffset + 5] = hHybrid->mTempReal[n][3] ; - - mHybridImag[n][chOffset + 0] = hHybrid->mTempImag[n][6] ; - mHybridImag[n][chOffset + 1] = hHybrid->mTempImag[n][7] ; - mHybridImag[n][chOffset + 2] = hHybrid->mTempImag[n][0] ; - mHybridImag[n][chOffset + 3] = hHybrid->mTempImag[n][1] ; - mHybridImag[n][chOffset + 4] = hHybrid->mTempImag[n][2] ; - mHybridImag[n][chOffset + 5] = hHybrid->mTempImag[n][3] ; - } - break; - - case HYBRID_8_CPLX: - eightChannelFiltering( hHybrid->pWorkReal, - hHybrid->pWorkImag, - hHybrid->fft, - hHybrid->mTempReal, - hHybrid->mTempImag, - frameSize, - /*(usedStereoBands==PS_BANDS_FINE)?p8_13_34:*/p8_13_20); - - /* copy data to output buffer */ - for(n = 0; n < frameSize; n++) { - FDKmemcpy(&mHybridReal[n][chOffset], hHybrid->mTempReal[n], - (INT)(hybridRes & HYBRID_INVERSE_MASK)*sizeof(FIXP_QMF)); - FDKmemcpy(&mHybridImag[n][chOffset], hHybrid->mTempImag[n], - (INT)(hybridRes & HYBRID_INVERSE_MASK)*sizeof(FIXP_QMF)); - } - break; - - default: - error = ERROR(CDI, "Invalid filter bank configuration."); - break; - } - /* prepare next run by incresing chOffset */ - chOffset += hybridRes & HYBRID_INVERSE_MASK; - } - } - - *sf_fixpHybrid = sf_fixpQmf + HYBRID_SCALE; - - return error; -} - -/**************************************************************************//** - FDKsbrEnc_CreateHybridFilterBank -******************************************************************************/ -HANDLE_ERROR_INFO -FDKsbrEnc_CreateHybridFilterBank ( HANDLE_PS_HYBRID *phHybrid, /*!< Pointer to handle to HYBRID struct. */ - INT ch) /*!< Current channel */ -{ - HANDLE_ERROR_INFO error = noError; - INT i; - HANDLE_PS_HYBRID hs = GetRam_PsHybrid(ch); /* allocate memory */ - if (hs==NULL) { - error = 1; - goto bail; - } - - hs->fft = GetRam_PsHybFFT(); - - /* alloc working memory */ - hs->pWorkReal = GetRam_PsHybWkReal(); - hs->pWorkImag = GetRam_PsHybWkImag(); - - if ( (hs->fft==NULL) || (hs->pWorkReal==NULL) || (hs->pWorkImag==NULL) ) { - error = 1; - goto bail; - } - - /* Allocate buffers */ - for (i = 0; i < HYBRID_FRAMESIZE; i++) { - hs->mTempReal[i] = GetRam_PsMtmpReal(i); - hs->mTempImag[i] = GetRam_PsMtmpImag(i); - if ( (hs->mTempReal[i]==NULL) || (hs->mTempImag[i]==NULL) ) { - error = 1; - goto bail; - } - } - -bail: - *phHybrid = hs; - return error; -} - -HANDLE_ERROR_INFO -FDKsbrEnc_InitHybridFilterBank ( HANDLE_PS_HYBRID hs, /*!< Handle to HYBRID struct. */ - HANDLE_PS_HYBRID_CONFIG hHybConfig, /*!< Configuration hanlde for filter bank */ - INT frameSize) /*!< Number of QMF slots */ -{ - HANDLE_ERROR_INFO error = noError; - INT i; - INT maxNoChannels = HYBRID_12_CPLX, noBands; - PS_BANDS mode; - const INT *RESTRICT pResolution; - - /* filter bank configuration */ - mode = hHybConfig->mode; - noBands = hHybConfig->noQmfBandsInHybrid; - pResolution = hHybConfig->aHybridResolution; - - /* assign resolution, check for valid values */ - for (i = 0; i < noBands; i++) { - if(error == noError){ - if( pResolution[i] != HYBRID_12_CPLX && - pResolution[i] != HYBRID_8_CPLX && - pResolution[i] != HYBRID_6_CPLX && - pResolution[i] != HYBRID_2_REAL && - pResolution[i] != (HYBRID_2_REAL | HYBRID_INVERSE_ORDER) && - pResolution[i] != HYBRID_4_CPLX ){ - error = ERROR(CDI, "Invalid filter bank resolution"); - } - } - hs->pResolution[i] = pResolution[i]; - if((pResolution[i] & HYBRID_INVERSE_MASK) > maxNoChannels){ - maxNoChannels = pResolution[i] & HYBRID_INVERSE_MASK; - } - } - FDK_ASSERT (MAX_HYBRID_RES>=maxNoChannels); /* check size of mTempReal/Imag */ - - /* assign parameters */ - hs->mode = mode; - hs->nQmfBands = noBands; - hs->frameSize = frameSize; - hs->frameSizeInit = frameSize; - hs->qmfBufferMove = HYBRID_FILTER_LENGTH - 1; - hs->hybridFilterDelay = HYBRID_FILTER_LENGTH/2; - - FDK_ASSERT (HYBRID_FRAMESIZE>=hs->frameSize); - FDK_ASSERT (QMF_BUFFER_MOVE>=hs->qmfBufferMove); - - return error; -} - - -/**************************************************************************//** - FDKsbrEnc_DeleteHybridFilterBank -******************************************************************************/ - -HANDLE_ERROR_INFO -FDKsbrEnc_DeleteHybridFilterBank ( HANDLE_PS_HYBRID* phHybrid ) /*!< Pointer to handle to HYBRID struct. */ -{ - int i; - HANDLE_PS_HYBRID hHybrid = *phHybrid; - - if (hHybrid!=NULL) { - if (hHybrid->fft) - FreeRam_PsHybFFT(&hHybrid->fft); - if (hHybrid->pWorkReal) - FreeRam_PsHybWkReal(&hHybrid->pWorkReal); - if (hHybrid->pWorkImag) - FreeRam_PsHybWkImag(&hHybrid->pWorkImag); - - for (i = 0; i < HYBRID_FRAMESIZE; i++) { - if (hHybrid->mTempReal[i]) - FreeRam_PsMtmpReal(&hHybrid->mTempReal[i]); - if (hHybrid->mTempImag[i]) - FreeRam_PsMtmpImag(&hHybrid->mTempImag[i]); - } - - FreeRam_PsHybrid(phHybrid); - } - - return noError; -} - -/*** Access functions ***/ -INT FDKsbrEnc_GetHybridFilterDelay(HANDLE_PS_HYBRID hHybrid){ - - return hHybrid->hybridFilterDelay; -} - |