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diff --git a/libSBRenc/src/env_est.cpp b/libSBRenc/src/env_est.cpp new file mode 100644 index 0000000..9423f27 --- /dev/null +++ b/libSBRenc/src/env_est.cpp @@ -0,0 +1,1866 @@ + +/* ----------------------------------------------------------------------------------------------------------- +Software License for The Fraunhofer FDK AAC Codec Library for Android + +© Copyright 1995 - 2012 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. + All rights reserved. + + 1. INTRODUCTION +The Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software that implements +the MPEG Advanced Audio Coding ("AAC") encoding and decoding scheme for digital audio. +This FDK AAC Codec software is intended to be used on a wide variety of Android devices. + +AAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient general perceptual +audio codecs. AAC-ELD is considered the best-performing full-bandwidth communications codec by +independent studies and is widely deployed. AAC has been standardized by ISO and IEC as part +of the MPEG specifications. + +Patent licenses for necessary patent claims for the FDK AAC Codec (including those of Fraunhofer) +may be obtained through Via Licensing (www.vialicensing.com) or through the respective patent owners +individually for the purpose of encoding or decoding bit streams in products that are compliant with +the ISO/IEC MPEG audio standards. Please note that most manufacturers of Android devices already license +these patent claims through Via Licensing or directly from the patent owners, and therefore FDK AAC Codec +software may already be covered under those patent licenses when it is used for those licensed purposes only. + +Commercially-licensed AAC software libraries, including floating-point versions with enhanced sound quality, +are also available from Fraunhofer. Users are encouraged to check the Fraunhofer website for additional +applications information and documentation. + +2. COPYRIGHT LICENSE + +Redistribution and use in source and binary forms, with or without modification, are permitted without +payment of copyright license fees provided that you satisfy the following conditions: + +You must retain the complete text of this software license in redistributions of the FDK AAC Codec or +your modifications thereto in source code form. + +You must retain the complete text of this software license in the documentation and/or other materials +provided with redistributions of the FDK AAC Codec or your modifications thereto in binary form. +You must make available free of charge copies of the complete source code of the FDK AAC Codec and your +modifications thereto to recipients of copies in binary form. + +The name of Fraunhofer may not be used to endorse or promote products derived from this library without +prior written permission. + +You may not charge copyright license fees for anyone to use, copy or distribute the FDK AAC Codec +software or your modifications thereto. + +Your modified versions of the FDK AAC Codec must carry prominent notices stating that you changed the software +and the date of any change. For modified versions of the FDK AAC Codec, the term +"Fraunhofer FDK AAC Codec Library for Android" must be replaced by the term +"Third-Party Modified Version of the Fraunhofer FDK AAC Codec Library for Android." + +3. NO PATENT LICENSE + +NO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without limitation the patents of Fraunhofer, +ARE GRANTED BY THIS SOFTWARE LICENSE. Fraunhofer provides no warranty of patent non-infringement with +respect to this software. + +You may use this FDK AAC Codec software or modifications thereto only for purposes that are authorized +by appropriate patent licenses. + +4. DISCLAIMER + +This FDK AAC Codec software is provided by Fraunhofer on behalf of the copyright holders and contributors +"AS IS" and WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, including but not limited to the implied warranties +of merchantability and fitness for a particular purpose. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR +CONTRIBUTORS BE LIABLE for any direct, indirect, incidental, special, exemplary, or consequential damages, +including but not limited to procurement of substitute goods or services; loss of use, data, or profits, +or business interruption, however caused and on any theory of liability, whether in contract, strict +liability, or tort (including negligence), arising in any way out of the use of this software, even if +advised of the possibility of such damage. + +5. CONTACT INFORMATION + +Fraunhofer Institute for Integrated Circuits IIS +Attention: Audio and Multimedia Departments - FDK AAC LL +Am Wolfsmantel 33 +91058 Erlangen, Germany + +www.iis.fraunhofer.de/amm +amm-info@iis.fraunhofer.de +----------------------------------------------------------------------------------------------------------- */ + +#include "env_est.h" +#include "tran_det.h" + +#include "qmf.h" + +#include "fram_gen.h" +#include "bit_sbr.h" +#include "cmondata.h" +#include "sbr_ram.h" + + +#include "genericStds.h" + +#define QUANT_ERROR_THRES 200 +#define Y_NRG_SCALE 5 /* noCols = 32 -> shift(5) */ + + +static const UCHAR panTable[2][10] = { { 0, 2, 4, 6, 8,12,16,20,24}, + { 0, 2, 4, 8,12, 0, 0, 0, 0 } }; +static const UCHAR maxIndex[2] = {9, 5}; + + +/***************************************************************************/ +/*! + + \brief Calculates energy form real and imaginary part of + the QMF subsamples + + \return none + +****************************************************************************/ +LNK_SECTION_CODE_L1 +static void +FDKsbrEnc_getEnergyFromCplxQmfData(FIXP_DBL **RESTRICT energyValues,/*!< the result of the operation */ + FIXP_DBL **RESTRICT realValues, /*!< the real part of the QMF subsamples */ + FIXP_DBL **RESTRICT imagValues, /*!< the imaginary part of the QMF subsamples */ + INT numberBands, /*!< number of QMF bands */ + INT numberCols, /*!< number of QMF subsamples */ + INT *qmfScale, /*!< sclefactor of QMF subsamples */ + INT *energyScale) /*!< scalefactor of energies */ +{ + int j, k; + int scale; + FIXP_DBL max_val = FL2FXCONST_DBL(0.0f); + + /* Get Scratch buffer */ + C_ALLOC_SCRATCH_START(tmpNrg, FIXP_DBL, QMF_CHANNELS*QMF_MAX_TIME_SLOTS/2); + + FDK_ASSERT(numberBands <= QMF_CHANNELS); + FDK_ASSERT(numberCols <= QMF_MAX_TIME_SLOTS); + + /* Get max possible scaling of QMF data */ + scale = DFRACT_BITS; + for (k=0; k<numberCols; k++) { + scale = fixMin(scale, fixMin(getScalefactor(realValues[k], numberBands), getScalefactor(imagValues[k], numberBands))); + } + + /* Tweak scaling stability for zero signal to non-zero signal transitions */ + if (scale >= DFRACT_BITS-1) { + scale = (FRACT_BITS-1-*qmfScale); + } + /* prevent scaling of QFM values to -1.f */ + scale = fixMax(0,scale-1); + + /* Update QMF scale */ + *qmfScale += scale; + + /* + Calculate energy of each time slot pair, max energy + and shift QMF values as far as possible to the left. + */ + { + FIXP_DBL *nrgValues = tmpNrg; + for (k=0; k<numberCols; k+=2) + { + /* Load band vector addresses of 2 consecutive timeslots */ + FIXP_DBL *RESTRICT r0 = realValues[k]; + FIXP_DBL *RESTRICT i0 = imagValues[k]; + FIXP_DBL *RESTRICT r1 = realValues[k+1]; + FIXP_DBL *RESTRICT i1 = imagValues[k+1]; + for (j=0; j<numberBands; j++) + { + FIXP_DBL energy; + FIXP_DBL tr0,tr1,ti0,ti1; + + /* Read QMF values of 2 timeslots */ + tr0 = r0[j]; tr1 = r1[j]; ti0 = i0[j]; ti1 = i1[j]; + + /* Scale QMF Values and Calc Energy of both timeslots */ + tr0 <<= scale; + ti0 <<= scale; + energy = fPow2AddDiv2(fPow2Div2(tr0), ti0) >> 1; + + tr1 <<= scale; + ti1 <<= scale; + energy += fPow2AddDiv2(fPow2Div2(tr1), ti1) >> 1; + + /* Write timeslot pair energy to scratch */ + *nrgValues++ = energy; + max_val = fixMax(max_val, energy); + + /* Write back scaled QMF values */ + r0[j] = tr0; r1[j] = tr1; i0[j] = ti0; i1[j] = ti1; + } + } + } + /* energyScale: scalefactor energies of current frame */ + *energyScale = 2*(*qmfScale)-1; /* if qmfScale > 0: nr of right shifts otherwise nr of left shifts */ + + /* Scale timeslot pair energies and write to output buffer */ + scale = CountLeadingBits(max_val); + { + FIXP_DBL *nrgValues = tmpNrg; + for (k=0; k<numberCols>>1; k++) { + scaleValues(energyValues[k], nrgValues, numberBands, scale); + nrgValues += numberBands; + } + *energyScale += scale; + } + + /* Free Scratch buffer */ + C_ALLOC_SCRATCH_END(tmpNrg, FIXP_DBL, QMF_CHANNELS*QMF_MAX_TIME_SLOTS/2); +} + +LNK_SECTION_CODE_L1 +static void +FDKsbrEnc_getEnergyFromCplxQmfDataFull(FIXP_DBL **RESTRICT energyValues,/*!< the result of the operation */ + FIXP_DBL **RESTRICT realValues, /*!< the real part of the QMF subsamples */ + FIXP_DBL **RESTRICT imagValues, /*!< the imaginary part of the QMF subsamples */ + int numberBands, /*!< number of QMF bands */ + int numberCols, /*!< number of QMF subsamples */ + int *qmfScale, /*!< sclefactor of QMF subsamples */ + int *energyScale) /*!< scalefactor of energies */ +{ + int j, k; + int scale; + FIXP_DBL max_val = FL2FXCONST_DBL(0.0f); + + /* Get Scratch buffer */ + C_ALLOC_SCRATCH_START(tmpNrg, FIXP_DBL, QMF_MAX_TIME_SLOTS*QMF_CHANNELS/2); + + FDK_ASSERT(numberBands <= QMF_CHANNELS); + FDK_ASSERT(numberCols <= QMF_MAX_TIME_SLOTS/2); + + /* Get max possible scaling of QMF data */ + scale = DFRACT_BITS; + for (k=0; k<numberCols; k++) { + scale = fixMin(scale, fixMin(getScalefactor(realValues[k], numberBands), getScalefactor(imagValues[k], numberBands))); + } + + /* Tweak scaling stability for zero signal to non-zero signal transitions */ + if (scale >= DFRACT_BITS-1) { + scale = (FRACT_BITS-1-*qmfScale); + } + /* prevent scaling of QFM values to -1.f */ + scale = fixMax(0,scale-1); + + /* Update QMF scale */ + *qmfScale += scale; + + /* + Calculate energy of each time slot pair, max energy + and shift QMF values as far as possible to the left. + */ + { + FIXP_DBL *nrgValues = tmpNrg; + for (k=0; k<numberCols; k++) + { + /* Load band vector addresses of 2 consecutive timeslots */ + FIXP_DBL *RESTRICT r0 = realValues[k]; + FIXP_DBL *RESTRICT i0 = imagValues[k]; + for (j=0; j<numberBands; j++) + { + FIXP_DBL energy; + FIXP_DBL tr0,ti0; + + /* Read QMF values of 2 timeslots */ + tr0 = r0[j]; ti0 = i0[j]; + + /* Scale QMF Values and Calc Energy of both timeslots */ + tr0 <<= scale; + ti0 <<= scale; + energy = fPow2AddDiv2(fPow2Div2(tr0), ti0); + *nrgValues++ = energy; + + max_val = fixMax(max_val, energy); + + /* Write back scaled QMF values */ + r0[j] = tr0; i0[j] = ti0; + } + } + } + /* energyScale: scalefactor energies of current frame */ + *energyScale = 2*(*qmfScale)-1; /* if qmfScale > 0: nr of right shifts otherwise nr of left shifts */ + + /* Scale timeslot pair energies and write to output buffer */ + scale = CountLeadingBits(max_val); + { + FIXP_DBL *nrgValues = tmpNrg; + for (k=0; k<numberCols; k++) { + scaleValues(energyValues[k], nrgValues, numberBands, scale); + nrgValues += numberBands; + } + *energyScale += scale; + } + + /* Free Scratch buffer */ + C_ALLOC_SCRATCH_END(tmpNrg, FIXP_DBL, QMF_MAX_TIME_SLOTS*QMF_CHANNELS/2); +} + +/***************************************************************************/ +/*! + + \brief Quantisation of the panorama value (balance) + + \return the quantized pan value + +****************************************************************************/ +static INT +mapPanorama(INT nrgVal, /*! integer value of the energy */ + INT ampRes, /*! amplitude resolution [1.5/3dB] */ + INT *quantError /*! quantization error of energy val*/ + ) +{ + int i; + INT min_val, val; + UCHAR panIndex; + INT sign; + + sign = nrgVal > 0 ? 1 : -1; + + nrgVal *= sign; + + min_val = FDK_INT_MAX; + panIndex = 0; + for (i = 0; i < maxIndex[ampRes]; i++) { + val = fixp_abs ((nrgVal - (INT)panTable[ampRes][i])); + + if (val < min_val) { + min_val = val; + panIndex = i; + } + } + + *quantError=min_val; + + return panTable[ampRes][maxIndex[ampRes]-1] + sign * panTable[ampRes][panIndex]; +} + + +/***************************************************************************/ +/*! + + \brief Quantisation of the noise floor levels + + \return void + +****************************************************************************/ +static void +sbrNoiseFloorLevelsQuantisation(SCHAR *RESTRICT iNoiseLevels, /*! quantized noise levels */ + FIXP_DBL *RESTRICT NoiseLevels, /*! the noise levels */ + INT coupling /*! the coupling flag */ + ) +{ + INT i; + INT tmp, dummy; + + /* Quantisation, similar to sfb quant... */ + for (i = 0; i < MAX_NUM_NOISE_VALUES; i++) { + /* tmp = NoiseLevels[i] > (PFLOAT)30.0f ? 30: (INT) (NoiseLevels[i] + (PFLOAT)0.5); */ + /* 30>>6 = 0.46875 */ + if ((FIXP_DBL)NoiseLevels[i] > FL2FXCONST_DBL(0.46875f)) { + tmp = 30; + } + else { + /* tmp = (INT)((FIXP_DBL)NoiseLevels[i] + (FL2FXCONST_DBL(0.5f)>>(*/ /* FRACT_BITS+ */ /* 6-1)));*/ + /* tmp = tmp >> (DFRACT_BITS-1-6); */ /* conversion to integer happens here */ + /* rounding is done by shifting one bit less than necessary to the right, adding '1' and then shifting the final bit */ + tmp = ((((INT)NoiseLevels[i])>>(DFRACT_BITS-1-LD_DATA_SHIFT)) ); /* conversion to integer */ + if (tmp != 0) + tmp += 1; + } + + if (coupling) { + tmp = tmp < -30 ? -30 : tmp; + tmp = mapPanorama (tmp,1,&dummy); + } + iNoiseLevels[i] = tmp; + } +} + +/***************************************************************************/ +/*! + + \brief Calculation of noise floor for coupling + + \return void + +****************************************************************************/ +static void +coupleNoiseFloor(FIXP_DBL *RESTRICT noise_level_left, /*! noise level left (modified)*/ + FIXP_DBL *RESTRICT noise_level_right /*! noise level right (modified)*/ + ) +{ + FIXP_DBL cmpValLeft,cmpValRight; + INT i; + FIXP_DBL temp1,temp2; + + for (i = 0; i < MAX_NUM_NOISE_VALUES; i++) { + + /* Calculation of the power function using ld64: + z = x^y; + z' = CalcLd64(z) = y*CalcLd64(x)/64; + z = CalcInvLd64(z'); + */ + cmpValLeft = NOISE_FLOOR_OFFSET_64 - noise_level_left[i]; + cmpValRight = NOISE_FLOOR_OFFSET_64 - noise_level_right[i]; + + if (cmpValRight < FL2FXCONST_DBL(0.0f)) { + temp1 = CalcInvLdData(NOISE_FLOOR_OFFSET_64 - noise_level_right[i]); + } + else { + temp1 = CalcInvLdData(NOISE_FLOOR_OFFSET_64 - noise_level_right[i]); + temp1 = temp1 << (DFRACT_BITS-1-LD_DATA_SHIFT-1); /* INT to fract conversion of result, if input of CalcInvLdData is positiv */ + } + + if (cmpValLeft < FL2FXCONST_DBL(0.0f)) { + temp2 = CalcInvLdData(NOISE_FLOOR_OFFSET_64 - noise_level_left[i]); + } + else { + temp2 = CalcInvLdData(NOISE_FLOOR_OFFSET_64 - noise_level_left[i]); + temp2 = temp2 << (DFRACT_BITS-1-LD_DATA_SHIFT-1); /* INT to fract conversion of result, if input of CalcInvLdData is positiv */ + } + + + if ((cmpValLeft < FL2FXCONST_DBL(0.0f)) && (cmpValRight < FL2FXCONST_DBL(0.0f))) { + noise_level_left[i] = NOISE_FLOOR_OFFSET_64 - (CalcLdData(((temp1>>1) + (temp2>>1)))); /* no scaling needed! both values are dfract */ + noise_level_right[i] = CalcLdData(temp2) - CalcLdData(temp1); + } + + if ((cmpValLeft >= FL2FXCONST_DBL(0.0f)) && (cmpValRight >= FL2FXCONST_DBL(0.0f))) { + noise_level_left[i] = NOISE_FLOOR_OFFSET_64 - (CalcLdData(((temp1>>1) + (temp2>>1))) + FL2FXCONST_DBL(0.109375f)); /* scaled with 7/64 */ + noise_level_right[i] = CalcLdData(temp2) - CalcLdData(temp1); + } + + if ((cmpValLeft >= FL2FXCONST_DBL(0.0f)) && (cmpValRight < FL2FXCONST_DBL(0.0f))) { + noise_level_left[i] = NOISE_FLOOR_OFFSET_64 - (CalcLdData(((temp1>>(7+1)) + (temp2>>1))) + FL2FXCONST_DBL(0.109375f)); /* scaled with 7/64 */ + noise_level_right[i] = (CalcLdData(temp2) + FL2FXCONST_DBL(0.109375f)) - CalcLdData(temp1); + } + + if ((cmpValLeft < FL2FXCONST_DBL(0.0f)) && (cmpValRight >= FL2FXCONST_DBL(0.0f))) { + noise_level_left[i] = NOISE_FLOOR_OFFSET_64 - (CalcLdData(((temp1>>1) + (temp2>>(7+1)))) + FL2FXCONST_DBL(0.109375f)); /* scaled with 7/64 */ + noise_level_right[i] = CalcLdData(temp2) - (CalcLdData(temp1) + FL2FXCONST_DBL(0.109375f)); /* scaled with 7/64 */ + } + } +} + +/***************************************************************************/ +/*! + + \brief Calculation of energy starting in lower band (li) up to upper band (ui) + over slots (start_pos) to (stop_pos) + + \return void + +****************************************************************************/ +static FIXP_DBL +getEnvSfbEnergy(INT li, /*! lower band */ + INT ui, /*! upper band */ + INT start_pos, /*! start slot */ + INT stop_pos, /*! stop slot */ + INT border_pos, /*! slots scaling border */ + FIXP_DBL **YBuffer, /*! sfb energy buffer */ + INT YBufferSzShift, /*! Energy buffer index scale */ + INT scaleNrg0, /*! scaling of lower slots */ + INT scaleNrg1) /*! scaling of upper slots */ +{ + /* use dynamic scaling for outer energy loop; + energies are critical and every bit is important */ + int sc0, sc1, k, l; + + FIXP_DBL nrgSum, nrg1, nrg2, accu1, accu2; + INT dynScale, dynScale1, dynScale2; + if(ui-li==0) dynScale = DFRACT_BITS-1; + else + dynScale = CalcLdInt(ui-li)>>(DFRACT_BITS-1-LD_DATA_SHIFT); + + sc0 = fixMin(scaleNrg0,Y_NRG_SCALE); sc1 = fixMin(scaleNrg1,Y_NRG_SCALE); + /* dynScale{1,2} is set such that the right shift below is positive */ + dynScale1 = fixMin((scaleNrg0-sc0),dynScale); + dynScale2 = fixMin((scaleNrg1-sc1),dynScale); + nrgSum = accu1 = accu2 = (FIXP_DBL)0; + + for (k = li; k < ui; k++) { + nrg1 = nrg2 = (FIXP_DBL)0; + for (l = start_pos; l < border_pos; l++) { + nrg1 += YBuffer[l>>YBufferSzShift][k] >> sc0; + } + for (; l < stop_pos; l++) { + nrg2 += YBuffer[l>>YBufferSzShift][k] >> sc1; + } + accu1 += (nrg1>>dynScale1); + accu2 += (nrg2>>dynScale2); + } + /* This shift factor is always positive. See comment above. */ + nrgSum += ( accu1 >> fixMin((scaleNrg0-sc0-dynScale1),(DFRACT_BITS-1)) ) + + ( accu2 >> fixMin((scaleNrg1-sc1-dynScale2),(DFRACT_BITS-1)) ); + + return nrgSum; +} + +/***************************************************************************/ +/*! + + \brief Energy compensation in missing harmonic mode + + \return void + +****************************************************************************/ +static FIXP_DBL +mhLoweringEnergy(FIXP_DBL nrg, INT M) +{ + /* + Compensating for the fact that we in the decoder map the "average energy to every QMF + band, and use this when we calculate the boost-factor. Since the mapped energy isn't + the average energy but the maximum energy in case of missing harmonic creation, we will + in the boost function calculate that too much limiting has been applied and hence we will + boost the signal although it isn't called for. Hence we need to compensate for this by + lowering the transmitted energy values for the sines so they will get the correct level + after the boost is applied. + */ + if(M > 2){ + INT tmpScale; + tmpScale = CountLeadingBits(nrg); + nrg <<= tmpScale; + nrg = fMult(nrg, FL2FXCONST_DBL(0.398107267f)); /* The maximum boost is 1.584893, so the maximum attenuation should be square(1/1.584893) = 0.398107267 */ + nrg >>= tmpScale; + } + else{ + if(M > 1){ + nrg >>= 1; + } + } + + return nrg; +} + +/***************************************************************************/ +/*! + + \brief Energy compensation in none missing harmonic mode + + \return void + +****************************************************************************/ +static FIXP_DBL +nmhLoweringEnergy(FIXP_DBL nrg, FIXP_DBL nrgSum, INT M) +{ + if (nrg>FL2FXCONST_DBL(0)) { + int sc=0; + /* gain = nrgSum / (nrg*(M+1)) */ + FIXP_DBL gain = fMult(fDivNorm(nrgSum, nrg, &sc), GetInvInt(M+1)); + + /* reduce nrg if gain smaller 1.f */ + if ( !((sc>=0) && ( gain > ((FIXP_DBL)MAXVAL_DBL>>sc) )) ) { + nrg = fMult(scaleValue(gain,sc), nrg); + } + } + return nrg; +} + +/***************************************************************************/ +/*! + + \brief calculates the envelope values from the energies, depending on + framing and stereo mode + + \return void + +****************************************************************************/ +static void +calculateSbrEnvelope (FIXP_DBL **RESTRICT YBufferLeft, /*! energy buffer left */ + FIXP_DBL **RESTRICT YBufferRight, /*! energy buffer right */ + int *RESTRICT YBufferScaleLeft, /*! scale energy buffer left */ + int *RESTRICT YBufferScaleRight, /*! scale energy buffer right */ + const SBR_FRAME_INFO *frame_info, /*! frame info vector */ + SCHAR *RESTRICT sfb_nrgLeft, /*! sfb energy buffer left */ + SCHAR *RESTRICT sfb_nrgRight, /*! sfb energy buffer right */ + HANDLE_SBR_CONFIG_DATA h_con, /*! handle to config data */ + HANDLE_ENV_CHANNEL h_sbr, /*! envelope channel handle */ + SBR_STEREO_MODE stereoMode, /*! stereo coding mode */ + INT* maxQuantError, /*! maximum quantization error, for panorama. */ + int YBufferSzShift) /*! Energy buffer index scale */ + +{ + int i, j, m = 0; + INT no_of_bands, start_pos, stop_pos, li, ui; + FREQ_RES freq_res; + + INT ca = 2 - h_sbr->encEnvData.init_sbr_amp_res; + INT oneBitLess = 0; + if (ca == 2) + oneBitLess = 1; /* LD_DATA_SHIFT => ld64 scaling; one bit less for rounding */ + + INT quantError; + INT nEnvelopes = frame_info->nEnvelopes; + INT short_env = frame_info->shortEnv - 1; + INT timeStep = h_sbr->sbrExtractEnvelope.time_step; + INT commonScale,scaleLeft0,scaleLeft1; + INT scaleRight0=0,scaleRight1=0; + + commonScale = fixMin(YBufferScaleLeft[0],YBufferScaleLeft[1]); + + if (stereoMode == SBR_COUPLING) { + commonScale = fixMin(commonScale,YBufferScaleRight[0]); + commonScale = fixMin(commonScale,YBufferScaleRight[1]); + } + + commonScale = commonScale - 7; + + scaleLeft0 = YBufferScaleLeft[0] - commonScale; + scaleLeft1 = YBufferScaleLeft[1] - commonScale ; + FDK_ASSERT ((scaleLeft0 >= 0) && (scaleLeft1 >= 0)); + + if (stereoMode == SBR_COUPLING) { + scaleRight0 = YBufferScaleRight[0] - commonScale; + scaleRight1 = YBufferScaleRight[1] - commonScale; + FDK_ASSERT ((scaleRight0 >= 0) && (scaleRight1 >= 0)); + *maxQuantError = 0; + } + + for (i = 0; i < nEnvelopes; i++) { + + FIXP_DBL pNrgLeft[QMF_MAX_TIME_SLOTS]; + FIXP_DBL pNrgRight[QMF_MAX_TIME_SLOTS]; + FIXP_DBL envNrgLeft = FL2FXCONST_DBL(0.0f); + FIXP_DBL envNrgRight = FL2FXCONST_DBL(0.0f); + int missingHarmonic[QMF_MAX_TIME_SLOTS]; + int count[QMF_MAX_TIME_SLOTS]; + + start_pos = timeStep * frame_info->borders[i]; + stop_pos = timeStep * frame_info->borders[i + 1]; + freq_res = frame_info->freqRes[i]; + no_of_bands = h_con->nSfb[freq_res]; + + if (i == short_env) { + stop_pos -= fixMax(2, timeStep); /* consider at least 2 QMF slots less for short envelopes (envelopes just before transients) */ + } + + for (j = 0; j < no_of_bands; j++) { + FIXP_DBL nrgLeft = FL2FXCONST_DBL(0.0f); + FIXP_DBL nrgRight = FL2FXCONST_DBL(0.0f); + + li = h_con->freqBandTable[freq_res][j]; + ui = h_con->freqBandTable[freq_res][j + 1]; + + if(freq_res == FREQ_RES_HIGH){ + if(j == 0 && ui-li > 1){ + li++; + } + } + else{ + if(j == 0 && ui-li > 2){ + li++; + } + } + + /* + Find out whether a sine will be missing in the scale-factor + band that we're currently processing. + */ + missingHarmonic[j] = 0; + + if(h_sbr->encEnvData.addHarmonicFlag){ + + if(freq_res == FREQ_RES_HIGH){ + if(h_sbr->encEnvData.addHarmonic[j]){ /*A missing sine in the current band*/ + missingHarmonic[j] = 1; + } + } + else{ + INT i; + INT startBandHigh = 0; + INT stopBandHigh = 0; + + while(h_con->freqBandTable[FREQ_RES_HIGH][startBandHigh] < h_con->freqBandTable[FREQ_RES_LOW][j]) + startBandHigh++; + while(h_con->freqBandTable[FREQ_RES_HIGH][stopBandHigh] < h_con->freqBandTable[FREQ_RES_LOW][j + 1]) + stopBandHigh++; + + for(i = startBandHigh; i<stopBandHigh; i++){ + if(h_sbr->encEnvData.addHarmonic[i]){ + missingHarmonic[j] = 1; + } + } + } + } + + /* + If a sine is missing in a scalefactorband, with more than one qmf channel + use the nrg from the channel with the largest nrg rather than the mean. + Compensate for the boost calculation in the decdoder. + */ + int border_pos = fixMin(stop_pos, h_sbr->sbrExtractEnvelope.YBufferWriteOffset<<YBufferSzShift); + + if(missingHarmonic[j]){ + + int k; + count[j] = stop_pos - start_pos; + nrgLeft = FL2FXCONST_DBL(0.0f); + + for (k = li; k < ui; k++) { + FIXP_DBL tmpNrg; + tmpNrg = getEnvSfbEnergy(k, + k+1, + start_pos, + stop_pos, + border_pos, + YBufferLeft, + YBufferSzShift, + scaleLeft0, + scaleLeft1); + + nrgLeft = fixMax(nrgLeft, tmpNrg); + } + + /* Energy lowering compensation */ + nrgLeft = mhLoweringEnergy(nrgLeft, ui-li); + + if (stereoMode == SBR_COUPLING) { + + nrgRight = FL2FXCONST_DBL(0.0f); + + for (k = li; k < ui; k++) { + FIXP_DBL tmpNrg; + tmpNrg = getEnvSfbEnergy(k, + k+1, + start_pos, + stop_pos, + border_pos, + YBufferRight, + YBufferSzShift, + scaleRight0, + scaleRight1); + + nrgRight = fixMax(nrgRight, tmpNrg); + } + + /* Energy lowering compensation */ + nrgRight = mhLoweringEnergy(nrgRight, ui-li); + } + } /* end missingHarmonic */ + else{ + count[j] = (stop_pos - start_pos) * (ui - li); + + nrgLeft = getEnvSfbEnergy(li, + ui, + start_pos, + stop_pos, + border_pos, + YBufferLeft, + YBufferSzShift, + scaleLeft0, + scaleLeft1); + + if (stereoMode == SBR_COUPLING) { + nrgRight = getEnvSfbEnergy(li, + ui, + start_pos, + stop_pos, + border_pos, + YBufferRight, + YBufferSzShift, + scaleRight0, + scaleRight1); + } + } /* !missingHarmonic */ + + /* save energies */ + pNrgLeft[j] = nrgLeft; + pNrgRight[j] = nrgRight; + envNrgLeft += nrgLeft; + envNrgRight += nrgRight; + + } /* j */ + + for (j = 0; j < no_of_bands; j++) { + + FIXP_DBL nrgLeft2 = FL2FXCONST_DBL(0.0f); + FIXP_DBL nrgLeft = pNrgLeft[j]; + FIXP_DBL nrgRight = pNrgRight[j]; + + /* None missing harmonic Energy lowering compensation */ + if(!missingHarmonic[j] && h_sbr->fLevelProtect) { + /* in case of missing energy in base band, + reduce reference energy to prevent overflows in decoder output */ + nrgLeft = nmhLoweringEnergy(nrgLeft, envNrgLeft, no_of_bands); + if (stereoMode == SBR_COUPLING) { + nrgRight = nmhLoweringEnergy(nrgRight, envNrgRight, no_of_bands); + } + } + + if (stereoMode == SBR_COUPLING) { + /* calc operation later with log */ + nrgLeft2 = nrgLeft; + nrgLeft = (nrgRight + nrgLeft) >> 1; + } + + /* nrgLeft = f20_log2(nrgLeft / (PFLOAT)(count * h_sbr->sbrQmf.no_channels))+(PFLOAT)44; */ + /* If nrgLeft == 0 then the Log calculations below do fail. */ + if (nrgLeft > FL2FXCONST_DBL(0.0f)) + { + FIXP_DBL tmp0,tmp1,tmp2,tmp3; + INT tmpScale; + + tmpScale = CountLeadingBits(nrgLeft); + nrgLeft = nrgLeft << tmpScale; + + tmp0 = CalcLdData(nrgLeft); /* scaled by 1/64 */ + tmp1 = ((FIXP_DBL) (commonScale+tmpScale)) << (DFRACT_BITS-1-LD_DATA_SHIFT-1); /* scaled by 1/64 */ + tmp2 = ((FIXP_DBL)(count[j]*h_con->noQmfBands)) << (DFRACT_BITS-1-14-1); + tmp2 = CalcLdData(tmp2); /* scaled by 1/64 */ + tmp3 = FL2FXCONST_DBL(0.6875f-0.21875f-0.015625f)>>1; /* scaled by 1/64 */ + + nrgLeft = ((tmp0-tmp2)>>1) + (tmp3 - tmp1); + } else { + nrgLeft = FL2FXCONST_DBL(-1.0f); + } + + /* ld64 to integer conversion */ + nrgLeft = fixMin(fixMax(nrgLeft,FL2FXCONST_DBL(0.0f)),FL2FXCONST_DBL(0.5f)); + nrgLeft = (FIXP_DBL)(LONG)nrgLeft >> (DFRACT_BITS-1-LD_DATA_SHIFT-1-oneBitLess-1); + sfb_nrgLeft[m] = ((INT)nrgLeft+1)>>1; /* rounding */ + + if (stereoMode == SBR_COUPLING) { + FIXP_DBL scaleFract; + + if (nrgRight != FL2FXCONST_DBL(0.0f)) { + int sc0 = CountLeadingBits(nrgLeft2); + int sc1 = CountLeadingBits(nrgRight); + + scaleFract = ((FIXP_DBL)(sc0-sc1)) << (DFRACT_BITS-1-LD_DATA_SHIFT); /* scale value in ld64 representation */ + nrgRight = CalcLdData(nrgLeft2<<sc0) - CalcLdData(nrgRight<<sc1) - scaleFract; + } + else + nrgRight = FL2FXCONST_DBL(0.5f); /* ld64(4294967296.0f) */ + + /* ld64 to integer conversion */ + nrgRight = (FIXP_DBL)(LONG)(nrgRight) >> (DFRACT_BITS-1-LD_DATA_SHIFT-1-oneBitLess); + nrgRight = (nrgRight+(FIXP_DBL)1)>>1; /* rounding */ + + sfb_nrgRight[m] = mapPanorama (nrgRight,h_sbr->encEnvData.init_sbr_amp_res,&quantError); + + *maxQuantError = fixMax(quantError, *maxQuantError); + } + + m++; + } /* j */ + + /* Do energy compensation for sines that are present in two + QMF-bands in the original, but will only occur in one band in + the decoder due to the synthetic sine coding.*/ + if (h_con->useParametricCoding) { + m-=no_of_bands; + for (j = 0; j < no_of_bands; j++) { + if (freq_res==FREQ_RES_HIGH && h_sbr->sbrExtractEnvelope.envelopeCompensation[j]){ + sfb_nrgLeft[m] -= (ca * fixp_abs((INT)h_sbr->sbrExtractEnvelope.envelopeCompensation[j])); + } + sfb_nrgLeft[m] = fixMax(0, sfb_nrgLeft[m]); + m++; + } + } /* useParametricCoding */ + + } /* i*/ +} + +/***************************************************************************/ +/*! + + \brief calculates the noise floor and the envelope values from the + energies, depending on framing and stereo mode + + FDKsbrEnc_extractSbrEnvelope is the main function for encoding and writing the + envelope and the noise floor. The function includes the following processes: + + -Analysis subband filtering. + -Encoding SA and pan parameters (if enabled). + -Transient detection. + +****************************************************************************/ + +LNK_SECTION_CODE_L1 +void +FDKsbrEnc_extractSbrEnvelope1 ( + HANDLE_SBR_CONFIG_DATA h_con, /*! handle to config data */ + HANDLE_SBR_HEADER_DATA sbrHeaderData, + HANDLE_SBR_BITSTREAM_DATA sbrBitstreamData, + HANDLE_ENV_CHANNEL hEnvChan, + HANDLE_COMMON_DATA hCmonData, + SBR_ENV_TEMP_DATA *eData, + SBR_FRAME_TEMP_DATA *fData + ) +{ + + HANDLE_SBR_EXTRACT_ENVELOPE sbrExtrEnv = &hEnvChan->sbrExtractEnvelope; + + if (sbrExtrEnv->YBufferSzShift == 0) + FDKsbrEnc_getEnergyFromCplxQmfDataFull(&sbrExtrEnv->YBuffer[sbrExtrEnv->YBufferWriteOffset], + sbrExtrEnv->rBuffer + sbrExtrEnv->rBufferReadOffset, + sbrExtrEnv->iBuffer + sbrExtrEnv->rBufferReadOffset, + h_con->noQmfBands, + sbrExtrEnv->no_cols, + &hEnvChan->qmfScale, + &sbrExtrEnv->YBufferScale[1]); + else + FDKsbrEnc_getEnergyFromCplxQmfData(&sbrExtrEnv->YBuffer[sbrExtrEnv->YBufferWriteOffset], + sbrExtrEnv->rBuffer + sbrExtrEnv->rBufferReadOffset, + sbrExtrEnv->iBuffer + sbrExtrEnv->rBufferReadOffset, + h_con->noQmfBands, + sbrExtrEnv->no_cols, + &hEnvChan->qmfScale, + &sbrExtrEnv->YBufferScale[1]); + + + + /* + Precalculation of Tonality Quotas COEFF Transform OK + */ + FDKsbrEnc_CalculateTonalityQuotas(&hEnvChan->TonCorr, + sbrExtrEnv->rBuffer, + sbrExtrEnv->iBuffer, + h_con->freqBandTable[HI][h_con->nSfb[HI]], + hEnvChan->qmfScale); + + + + /* + Transient detection COEFF Transform OK + */ + FDKsbrEnc_transientDetect(&hEnvChan->sbrTransientDetector, + sbrExtrEnv->YBuffer, + sbrExtrEnv->YBufferScale, + eData->transient_info, + sbrExtrEnv->YBufferWriteOffset, + sbrExtrEnv->YBufferSzShift, + sbrExtrEnv->time_step, + hEnvChan->SbrEnvFrame.frameMiddleSlot); + + + + /* + Generate flags for 2 env in a FIXFIX-frame. + Remove this function to get always 1 env per FIXFIX-frame. + */ + + /* + frame Splitter COEFF Transform OK + */ + FDKsbrEnc_frameSplitter(sbrExtrEnv->YBuffer, + sbrExtrEnv->YBufferScale, + &hEnvChan->sbrTransientDetector, + h_con->freqBandTable[1], + eData->transient_info, + sbrExtrEnv->YBufferWriteOffset, + sbrExtrEnv->YBufferSzShift, + h_con->nSfb[1], + sbrExtrEnv->time_step, + sbrExtrEnv->no_cols); + + +} + +/***************************************************************************/ +/*! + + \brief calculates the noise floor and the envelope values from the + energies, depending on framing and stereo mode + + FDKsbrEnc_extractSbrEnvelope is the main function for encoding and writing the + envelope and the noise floor. The function includes the following processes: + + -Determine time/frequency division of current granule. + -Sending transient info to bitstream. + -Set amp_res to 1.5 dB if the current frame contains only one envelope. + -Lock dynamic bandwidth frequency change if the next envelope not starts on a + frame boundary. + -MDCT transposer (needed to detect where harmonics will be missing). + -Spectrum Estimation (used for pulse train and missing harmonics detection). + -Pulse train detection. + -Inverse Filtering detection. + -Waveform Coding. + -Missing Harmonics detection. + -Extract envelope of current frame. + -Noise floor estimation. + -Noise floor quantisation and coding. + -Encode envelope of current frame. + -Send the encoded data to the bitstream. + -Write to bitstream. + +****************************************************************************/ + +LNK_SECTION_CODE_L1 +void +FDKsbrEnc_extractSbrEnvelope2 ( + HANDLE_SBR_CONFIG_DATA h_con, /*! handle to config data */ + HANDLE_SBR_HEADER_DATA sbrHeaderData, + HANDLE_PARAMETRIC_STEREO hParametricStereo, + HANDLE_SBR_BITSTREAM_DATA sbrBitstreamData, + HANDLE_ENV_CHANNEL h_envChan0, + HANDLE_ENV_CHANNEL h_envChan1, + HANDLE_COMMON_DATA hCmonData, + SBR_ENV_TEMP_DATA *eData, + SBR_FRAME_TEMP_DATA *fData, + int clearOutput + ) +{ + HANDLE_ENV_CHANNEL h_envChan[MAX_NUM_CHANNELS] = {h_envChan0, h_envChan1}; + int ch, i, j, c, YSzShift = h_envChan[0]->sbrExtractEnvelope.YBufferSzShift; + + SBR_STEREO_MODE stereoMode = h_con->stereoMode; + int nChannels = h_con->nChannels; + const int *v_tuning; + static const int v_tuningHEAAC[6] = { 0, 2, 4, 0, 0, 0 }; + + static const int v_tuningELD[6] = { 0, 2, 3, 0, 0, 0 }; + + if (h_con->sbrSyntaxFlags & SBR_SYNTAX_LOW_DELAY) + v_tuning = v_tuningELD; + else + v_tuning = v_tuningHEAAC; + + + /* + Select stereo mode. + */ + if (stereoMode == SBR_COUPLING) { + if (eData[0].transient_info[1] && eData[1].transient_info[1]) { + eData[0].transient_info[0] = fixMin(eData[1].transient_info[0], eData[0].transient_info[0]); + eData[1].transient_info[0] = eData[0].transient_info[0]; + } + else { + if (eData[0].transient_info[1] && !eData[1].transient_info[1]) { + eData[1].transient_info[0] = eData[0].transient_info[0]; + } + else { + if (!eData[0].transient_info[1] && eData[1].transient_info[1]) + eData[0].transient_info[0] = eData[1].transient_info[0]; + else { + eData[0].transient_info[0] = fixMax(eData[1].transient_info[0], eData[0].transient_info[0]); + eData[1].transient_info[0] = eData[0].transient_info[0]; + } + } + } + } + + /* + Determine time/frequency division of current granule + */ + eData[0].frame_info = FDKsbrEnc_frameInfoGenerator(&h_envChan[0]->SbrEnvFrame, + eData[0].transient_info, + h_envChan[0]->sbrExtractEnvelope.pre_transient_info, + h_envChan[0]->encEnvData.ldGrid, + v_tuning); + + h_envChan[0]->encEnvData.hSbrBSGrid = &h_envChan[0]->SbrEnvFrame.SbrGrid; + + /* AAC LD patch for transient prediction */ + if (h_envChan[0]->encEnvData.ldGrid && eData[0].transient_info[2]) { + /* if next frame will start with transient, set shortEnv to numEnvelopes(shortend Envelope = shortEnv-1)*/ + h_envChan[0]->SbrEnvFrame.SbrFrameInfo.shortEnv = h_envChan[0]->SbrEnvFrame.SbrFrameInfo.nEnvelopes; + } + + + switch (stereoMode) { + case SBR_LEFT_RIGHT: + case SBR_SWITCH_LRC: + eData[1].frame_info = FDKsbrEnc_frameInfoGenerator(&h_envChan[1]->SbrEnvFrame, + eData[1].transient_info, + h_envChan[1]->sbrExtractEnvelope.pre_transient_info, + h_envChan[1]->encEnvData.ldGrid, + v_tuning); + + h_envChan[1]->encEnvData.hSbrBSGrid = &h_envChan[1]->SbrEnvFrame.SbrGrid; + + if (h_envChan[1]->encEnvData.ldGrid && eData[1].transient_info[2]) { + /* if next frame will start with transient, set shortEnv to numEnvelopes(shortend Envelope = shortEnv-1)*/ + h_envChan[1]->SbrEnvFrame.SbrFrameInfo.shortEnv = h_envChan[1]->SbrEnvFrame.SbrFrameInfo.nEnvelopes; + } + + /* compare left and right frame_infos */ + if (eData[0].frame_info->nEnvelopes != eData[1].frame_info->nEnvelopes) { + stereoMode = SBR_LEFT_RIGHT; + } else { + for (i = 0; i < eData[0].frame_info->nEnvelopes + 1; i++) { + if (eData[0].frame_info->borders[i] != eData[1].frame_info->borders[i]) { + stereoMode = SBR_LEFT_RIGHT; + break; + } + } + for (i = 0; i < eData[0].frame_info->nEnvelopes; i++) { + if (eData[0].frame_info->freqRes[i] != eData[1].frame_info->freqRes[i]) { + stereoMode = SBR_LEFT_RIGHT; + break; + } + } + if (eData[0].frame_info->shortEnv != eData[1].frame_info->shortEnv) { + stereoMode = SBR_LEFT_RIGHT; + } + } + break; + case SBR_COUPLING: + eData[1].frame_info = eData[0].frame_info; + h_envChan[1]->encEnvData.hSbrBSGrid = &h_envChan[0]->SbrEnvFrame.SbrGrid; + break; + case SBR_MONO: + /* nothing to do */ + break; + default: + FDK_ASSERT (0); + } + + + for (ch = 0; ch < nChannels;ch++) + { + HANDLE_ENV_CHANNEL hEnvChan = h_envChan[ch]; + HANDLE_SBR_EXTRACT_ENVELOPE sbrExtrEnv = &hEnvChan->sbrExtractEnvelope; + SBR_ENV_TEMP_DATA *ed = &eData[ch]; + + + /* + Send transient info to bitstream and store for next call + */ + sbrExtrEnv->pre_transient_info[0] = ed->transient_info[0];/* tran_pos */ + sbrExtrEnv->pre_transient_info[1] = ed->transient_info[1];/* tran_flag */ + hEnvChan->encEnvData.noOfEnvelopes = ed->nEnvelopes = ed->frame_info->nEnvelopes; /* number of envelopes of current frame */ + + /* + Check if the current frame is divided into one envelope only. If so, set the amplitude + resolution to 1.5 dB, otherwise may set back to chosen value + */ + if( ( hEnvChan->encEnvData.hSbrBSGrid->frameClass == FIXFIX ) + && ( ed->nEnvelopes == 1 ) ) + { + + if (hEnvChan->encEnvData.ldGrid) + hEnvChan->encEnvData.currentAmpResFF = (AMP_RES)h_con->initAmpResFF; + else + hEnvChan->encEnvData.currentAmpResFF = SBR_AMP_RES_1_5; + + if ( hEnvChan->encEnvData.currentAmpResFF != hEnvChan->encEnvData.init_sbr_amp_res) { + + FDKsbrEnc_InitSbrHuffmanTables(&hEnvChan->encEnvData, + &hEnvChan->sbrCodeEnvelope, + &hEnvChan->sbrCodeNoiseFloor, + hEnvChan->encEnvData.currentAmpResFF); + } + } + else { + if(sbrHeaderData->sbr_amp_res != hEnvChan->encEnvData.init_sbr_amp_res ) { + + FDKsbrEnc_InitSbrHuffmanTables(&hEnvChan->encEnvData, + &hEnvChan->sbrCodeEnvelope, + &hEnvChan->sbrCodeNoiseFloor, + sbrHeaderData->sbr_amp_res); + } + } + + if (!clearOutput) { + + /* + Tonality correction parameter extraction (inverse filtering level, noise floor additional sines). + */ + FDKsbrEnc_TonCorrParamExtr(&hEnvChan->TonCorr, + hEnvChan->encEnvData.sbr_invf_mode_vec, + ed->noiseFloor, + &hEnvChan->encEnvData.addHarmonicFlag, + hEnvChan->encEnvData.addHarmonic, + sbrExtrEnv->envelopeCompensation, + ed->frame_info, + ed->transient_info, + h_con->freqBandTable[HI], + h_con->nSfb[HI], + hEnvChan->encEnvData.sbr_xpos_mode, + h_con->sbrSyntaxFlags); + + } + + /* Low energy in low band fix */ + if ( hEnvChan->sbrTransientDetector.prevLowBandEnergy < hEnvChan->sbrTransientDetector.prevHighBandEnergy && hEnvChan->sbrTransientDetector.prevHighBandEnergy > FL2FX_DBL(0.03)) + { + int i; + + hEnvChan->fLevelProtect = 1; + + for (i=0; i<MAX_NUM_NOISE_VALUES; i++) + hEnvChan->encEnvData.sbr_invf_mode_vec[i] = INVF_HIGH_LEVEL; + } else { + hEnvChan->fLevelProtect = 0; + } + + hEnvChan->encEnvData.sbr_invf_mode = hEnvChan->encEnvData.sbr_invf_mode_vec[0]; + + hEnvChan->encEnvData.noOfnoisebands = hEnvChan->TonCorr.sbrNoiseFloorEstimate.noNoiseBands; + + + } /* ch */ + + + + /* + Save number of scf bands per envelope + */ + for (ch = 0; ch < nChannels;ch++) { + for (i = 0; i < eData[ch].nEnvelopes; i++){ + h_envChan[ch]->encEnvData.noScfBands[i] = + (eData[ch].frame_info->freqRes[i] == FREQ_RES_HIGH ? h_con->nSfb[FREQ_RES_HIGH] : h_con->nSfb[FREQ_RES_LOW]); + } + } + + /* + Extract envelope of current frame. + */ + switch (stereoMode) { + case SBR_MONO: + calculateSbrEnvelope (h_envChan[0]->sbrExtractEnvelope.YBuffer, NULL, + h_envChan[0]->sbrExtractEnvelope.YBufferScale, NULL, + eData[0].frame_info, eData[0].sfb_nrg, NULL, + h_con, h_envChan[0], SBR_MONO, NULL, YSzShift); + break; + case SBR_LEFT_RIGHT: + calculateSbrEnvelope (h_envChan[0]->sbrExtractEnvelope.YBuffer, NULL, + h_envChan[0]->sbrExtractEnvelope.YBufferScale, NULL, + eData[0].frame_info, eData[0].sfb_nrg, NULL, + h_con, h_envChan[0], SBR_MONO, NULL, YSzShift); + calculateSbrEnvelope (h_envChan[1]->sbrExtractEnvelope.YBuffer, NULL, + h_envChan[1]->sbrExtractEnvelope.YBufferScale, NULL, + eData[1].frame_info,eData[1].sfb_nrg, NULL, + h_con, h_envChan[1], SBR_MONO, NULL, YSzShift); + break; + case SBR_COUPLING: + calculateSbrEnvelope (h_envChan[0]->sbrExtractEnvelope.YBuffer, h_envChan[1]->sbrExtractEnvelope.YBuffer, + h_envChan[0]->sbrExtractEnvelope.YBufferScale, h_envChan[1]->sbrExtractEnvelope.YBufferScale, + eData[0].frame_info, eData[0].sfb_nrg, eData[1].sfb_nrg, + h_con, h_envChan[0], SBR_COUPLING, &fData->maxQuantError, YSzShift); + break; + case SBR_SWITCH_LRC: + calculateSbrEnvelope (h_envChan[0]->sbrExtractEnvelope.YBuffer, NULL, + h_envChan[0]->sbrExtractEnvelope.YBufferScale, NULL, + eData[0].frame_info, eData[0].sfb_nrg, NULL, + h_con, h_envChan[0], SBR_MONO, NULL, YSzShift); + calculateSbrEnvelope (h_envChan[1]->sbrExtractEnvelope.YBuffer, NULL, + h_envChan[1]->sbrExtractEnvelope.YBufferScale, NULL, + eData[1].frame_info, eData[1].sfb_nrg, NULL, + h_con, h_envChan[1], SBR_MONO,NULL, YSzShift); + calculateSbrEnvelope (h_envChan[0]->sbrExtractEnvelope.YBuffer, h_envChan[1]->sbrExtractEnvelope.YBuffer, + h_envChan[0]->sbrExtractEnvelope.YBufferScale, h_envChan[1]->sbrExtractEnvelope.YBufferScale, + eData[0].frame_info, eData[0].sfb_nrg_coupling, eData[1].sfb_nrg_coupling, + h_con, h_envChan[0], SBR_COUPLING, &fData->maxQuantError, YSzShift); + break; + } + + + + /* + Noise floor quantisation and coding. + */ + + switch (stereoMode) { + case SBR_MONO: + sbrNoiseFloorLevelsQuantisation(eData[0].noise_level, eData[0].noiseFloor, 0); + + FDKsbrEnc_codeEnvelope(eData[0].noise_level, fData->res, + &h_envChan[0]->sbrCodeNoiseFloor, + h_envChan[0]->encEnvData.domain_vec_noise, 0, + (eData[0].frame_info->nEnvelopes > 1 ? 2 : 1), 0, + sbrBitstreamData->HeaderActive); + + break; + case SBR_LEFT_RIGHT: + sbrNoiseFloorLevelsQuantisation(eData[0].noise_level,eData[0].noiseFloor, 0); + + FDKsbrEnc_codeEnvelope (eData[0].noise_level, fData->res, + &h_envChan[0]->sbrCodeNoiseFloor, + h_envChan[0]->encEnvData.domain_vec_noise, 0, + (eData[0].frame_info->nEnvelopes > 1 ? 2 : 1), 0, + sbrBitstreamData->HeaderActive); + + sbrNoiseFloorLevelsQuantisation(eData[1].noise_level,eData[1].noiseFloor, 0); + + FDKsbrEnc_codeEnvelope (eData[1].noise_level, fData->res, + &h_envChan[1]->sbrCodeNoiseFloor, + h_envChan[1]->encEnvData.domain_vec_noise, 0, + (eData[1].frame_info->nEnvelopes > 1 ? 2 : 1), 0, + sbrBitstreamData->HeaderActive); + + break; + + case SBR_COUPLING: + coupleNoiseFloor(eData[0].noiseFloor,eData[1].noiseFloor); + + sbrNoiseFloorLevelsQuantisation(eData[0].noise_level,eData[0].noiseFloor, 0); + + FDKsbrEnc_codeEnvelope (eData[0].noise_level, fData->res, + &h_envChan[0]->sbrCodeNoiseFloor, + h_envChan[0]->encEnvData.domain_vec_noise, 1, + (eData[0].frame_info->nEnvelopes > 1 ? 2 : 1), 0, + sbrBitstreamData->HeaderActive); + + sbrNoiseFloorLevelsQuantisation(eData[1].noise_level,eData[1].noiseFloor, 1); + + FDKsbrEnc_codeEnvelope (eData[1].noise_level, fData->res, + &h_envChan[1]->sbrCodeNoiseFloor, + h_envChan[1]->encEnvData.domain_vec_noise, 1, + (eData[1].frame_info->nEnvelopes > 1 ? 2 : 1), 1, + sbrBitstreamData->HeaderActive); + + break; + case SBR_SWITCH_LRC: + sbrNoiseFloorLevelsQuantisation(eData[0].noise_level,eData[0].noiseFloor, 0); + sbrNoiseFloorLevelsQuantisation(eData[1].noise_level,eData[1].noiseFloor, 0); + coupleNoiseFloor(eData[0].noiseFloor,eData[1].noiseFloor); + sbrNoiseFloorLevelsQuantisation(eData[0].noise_level_coupling,eData[0].noiseFloor, 0); + sbrNoiseFloorLevelsQuantisation(eData[1].noise_level_coupling,eData[1].noiseFloor, 1); + break; + } + + + + /* + Encode envelope of current frame. + */ + switch (stereoMode) { + case SBR_MONO: + sbrHeaderData->coupling = 0; + h_envChan[0]->encEnvData.balance = 0; + FDKsbrEnc_codeEnvelope (eData[0].sfb_nrg, eData[0].frame_info->freqRes, + &h_envChan[0]->sbrCodeEnvelope, + h_envChan[0]->encEnvData.domain_vec, + sbrHeaderData->coupling, + eData[0].frame_info->nEnvelopes, 0, + sbrBitstreamData->HeaderActive); + break; + case SBR_LEFT_RIGHT: + sbrHeaderData->coupling = 0; + + h_envChan[0]->encEnvData.balance = 0; + h_envChan[1]->encEnvData.balance = 0; + + + FDKsbrEnc_codeEnvelope (eData[0].sfb_nrg, eData[0].frame_info->freqRes, + &h_envChan[0]->sbrCodeEnvelope, + h_envChan[0]->encEnvData.domain_vec, + sbrHeaderData->coupling, + eData[0].frame_info->nEnvelopes, 0, + sbrBitstreamData->HeaderActive); + FDKsbrEnc_codeEnvelope (eData[1].sfb_nrg, eData[1].frame_info->freqRes, + &h_envChan[1]->sbrCodeEnvelope, + h_envChan[1]->encEnvData.domain_vec, + sbrHeaderData->coupling, + eData[1].frame_info->nEnvelopes, 0, + sbrBitstreamData->HeaderActive); + break; + case SBR_COUPLING: + sbrHeaderData->coupling = 1; + h_envChan[0]->encEnvData.balance = 0; + h_envChan[1]->encEnvData.balance = 1; + + FDKsbrEnc_codeEnvelope (eData[0].sfb_nrg, eData[0].frame_info->freqRes, + &h_envChan[0]->sbrCodeEnvelope, + h_envChan[0]->encEnvData.domain_vec, + sbrHeaderData->coupling, + eData[0].frame_info->nEnvelopes, 0, + sbrBitstreamData->HeaderActive); + FDKsbrEnc_codeEnvelope (eData[1].sfb_nrg, eData[1].frame_info->freqRes, + &h_envChan[1]->sbrCodeEnvelope, + h_envChan[1]->encEnvData.domain_vec, + sbrHeaderData->coupling, + eData[1].frame_info->nEnvelopes, 1, + sbrBitstreamData->HeaderActive); + break; + case SBR_SWITCH_LRC: + { + INT payloadbitsLR; + INT payloadbitsCOUPLING; + + SCHAR sfbNrgPrevTemp[MAX_NUM_CHANNELS][MAX_FREQ_COEFFS]; + SCHAR noisePrevTemp[MAX_NUM_CHANNELS][MAX_NUM_NOISE_COEFFS]; + INT upDateNrgTemp[MAX_NUM_CHANNELS]; + INT upDateNoiseTemp[MAX_NUM_CHANNELS]; + INT domainVecTemp[MAX_NUM_CHANNELS][MAX_ENVELOPES]; + INT domainVecNoiseTemp[MAX_NUM_CHANNELS][MAX_ENVELOPES]; + + INT tempFlagRight = 0; + INT tempFlagLeft = 0; + + /* + Store previous values, in order to be able to "undo" what is being done. + */ + + for(ch = 0; ch < nChannels;ch++){ + FDKmemcpy (sfbNrgPrevTemp[ch], h_envChan[ch]->sbrCodeEnvelope.sfb_nrg_prev, + MAX_FREQ_COEFFS * sizeof (SCHAR)); + + FDKmemcpy (noisePrevTemp[ch], h_envChan[ch]->sbrCodeNoiseFloor.sfb_nrg_prev, + MAX_NUM_NOISE_COEFFS * sizeof (SCHAR)); + + upDateNrgTemp[ch] = h_envChan[ch]->sbrCodeEnvelope.upDate; + upDateNoiseTemp[ch] = h_envChan[ch]->sbrCodeNoiseFloor.upDate; + + /* + forbid time coding in the first envelope in case of a different + previous stereomode + */ + if(sbrHeaderData->prev_coupling){ + h_envChan[ch]->sbrCodeEnvelope.upDate = 0; + h_envChan[ch]->sbrCodeNoiseFloor.upDate = 0; + } + } /* ch */ + + + /* + Code ordinary Left/Right stereo + */ + FDKsbrEnc_codeEnvelope (eData[0].sfb_nrg, eData[0].frame_info->freqRes, + &h_envChan[0]->sbrCodeEnvelope, + h_envChan[0]->encEnvData.domain_vec, 0, + eData[0].frame_info->nEnvelopes, 0, + sbrBitstreamData->HeaderActive); + FDKsbrEnc_codeEnvelope (eData[1].sfb_nrg, eData[1].frame_info->freqRes, + &h_envChan[1]->sbrCodeEnvelope, + h_envChan[1]->encEnvData.domain_vec, 0, + eData[1].frame_info->nEnvelopes, 0, + sbrBitstreamData->HeaderActive); + + c = 0; + for (i = 0; i < eData[0].nEnvelopes; i++) { + for (j = 0; j < h_envChan[0]->encEnvData.noScfBands[i]; j++) + { + h_envChan[0]->encEnvData.ienvelope[i][j] = eData[0].sfb_nrg[c]; + h_envChan[1]->encEnvData.ienvelope[i][j] = eData[1].sfb_nrg[c]; + c++; + } + } + + + + FDKsbrEnc_codeEnvelope (eData[0].noise_level, fData->res, + &h_envChan[0]->sbrCodeNoiseFloor, + h_envChan[0]->encEnvData.domain_vec_noise, 0, + (eData[0].frame_info->nEnvelopes > 1 ? 2 : 1), 0, + sbrBitstreamData->HeaderActive); + + + for (i = 0; i < MAX_NUM_NOISE_VALUES; i++) + h_envChan[0]->encEnvData.sbr_noise_levels[i] = eData[0].noise_level[i]; + + + FDKsbrEnc_codeEnvelope (eData[1].noise_level, fData->res, + &h_envChan[1]->sbrCodeNoiseFloor, + h_envChan[1]->encEnvData.domain_vec_noise, 0, + (eData[1].frame_info->nEnvelopes > 1 ? 2 : 1), 0, + sbrBitstreamData->HeaderActive); + + for (i = 0; i < MAX_NUM_NOISE_VALUES; i++) + h_envChan[1]->encEnvData.sbr_noise_levels[i] = eData[1].noise_level[i]; + + + sbrHeaderData->coupling = 0; + h_envChan[0]->encEnvData.balance = 0; + h_envChan[1]->encEnvData.balance = 0; + + payloadbitsLR = FDKsbrEnc_CountSbrChannelPairElement (sbrHeaderData, + hParametricStereo, + sbrBitstreamData, + &h_envChan[0]->encEnvData, + &h_envChan[1]->encEnvData, + hCmonData, + h_con->sbrSyntaxFlags); + + /* + swap saved stored with current values + */ + for(ch = 0; ch < nChannels;ch++){ + INT itmp; + for(i=0;i<MAX_FREQ_COEFFS;i++){ + /* + swap sfb energies + */ + itmp = h_envChan[ch]->sbrCodeEnvelope.sfb_nrg_prev[i]; + h_envChan[ch]->sbrCodeEnvelope.sfb_nrg_prev[i]=sfbNrgPrevTemp[ch][i]; + sfbNrgPrevTemp[ch][i]=itmp; + } + for(i=0;i<MAX_NUM_NOISE_COEFFS;i++){ + /* + swap noise energies + */ + itmp = h_envChan[ch]->sbrCodeNoiseFloor.sfb_nrg_prev[i]; + h_envChan[ch]->sbrCodeNoiseFloor.sfb_nrg_prev[i]=noisePrevTemp[ch][i]; + noisePrevTemp[ch][i]=itmp; + } + /* swap update flags */ + itmp = h_envChan[ch]->sbrCodeEnvelope.upDate; + h_envChan[ch]->sbrCodeEnvelope.upDate=upDateNrgTemp[ch]; + upDateNrgTemp[ch] = itmp; + + itmp = h_envChan[ch]->sbrCodeNoiseFloor.upDate; + h_envChan[ch]->sbrCodeNoiseFloor.upDate=upDateNoiseTemp[ch]; + upDateNoiseTemp[ch]=itmp; + + /* + save domain vecs + */ + FDKmemcpy(domainVecTemp[ch],h_envChan[ch]->encEnvData.domain_vec,sizeof(INT)*MAX_ENVELOPES); + FDKmemcpy(domainVecNoiseTemp[ch],h_envChan[ch]->encEnvData.domain_vec_noise,sizeof(INT)*MAX_ENVELOPES); + + /* + forbid time coding in the first envelope in case of a different + previous stereomode + */ + + if(!sbrHeaderData->prev_coupling){ + h_envChan[ch]->sbrCodeEnvelope.upDate = 0; + h_envChan[ch]->sbrCodeNoiseFloor.upDate = 0; + } + } /* ch */ + + + /* + Coupling + */ + + FDKsbrEnc_codeEnvelope (eData[0].sfb_nrg_coupling, eData[0].frame_info->freqRes, + &h_envChan[0]->sbrCodeEnvelope, + h_envChan[0]->encEnvData.domain_vec, 1, + eData[0].frame_info->nEnvelopes, 0, + sbrBitstreamData->HeaderActive); + + FDKsbrEnc_codeEnvelope (eData[1].sfb_nrg_coupling, eData[1].frame_info->freqRes, + &h_envChan[1]->sbrCodeEnvelope, + h_envChan[1]->encEnvData.domain_vec, 1, + eData[1].frame_info->nEnvelopes, 1, + sbrBitstreamData->HeaderActive); + + + c = 0; + for (i = 0; i < eData[0].nEnvelopes; i++) { + for (j = 0; j < h_envChan[0]->encEnvData.noScfBands[i]; j++) { + h_envChan[0]->encEnvData.ienvelope[i][j] = eData[0].sfb_nrg_coupling[c]; + h_envChan[1]->encEnvData.ienvelope[i][j] = eData[1].sfb_nrg_coupling[c]; + c++; + } + } + + FDKsbrEnc_codeEnvelope (eData[0].noise_level_coupling, fData->res, + &h_envChan[0]->sbrCodeNoiseFloor, + h_envChan[0]->encEnvData.domain_vec_noise, 1, + (eData[0].frame_info->nEnvelopes > 1 ? 2 : 1), 0, + sbrBitstreamData->HeaderActive); + + for (i = 0; i < MAX_NUM_NOISE_VALUES; i++) + h_envChan[0]->encEnvData.sbr_noise_levels[i] = eData[0].noise_level_coupling[i]; + + + FDKsbrEnc_codeEnvelope (eData[1].noise_level_coupling, fData->res, + &h_envChan[1]->sbrCodeNoiseFloor, + h_envChan[1]->encEnvData.domain_vec_noise, 1, + (eData[1].frame_info->nEnvelopes > 1 ? 2 : 1), 1, + sbrBitstreamData->HeaderActive); + + for (i = 0; i < MAX_NUM_NOISE_VALUES; i++) + h_envChan[1]->encEnvData.sbr_noise_levels[i] = eData[1].noise_level_coupling[i]; + + sbrHeaderData->coupling = 1; + + h_envChan[0]->encEnvData.balance = 0; + h_envChan[1]->encEnvData.balance = 1; + + tempFlagLeft = h_envChan[0]->encEnvData.addHarmonicFlag; + tempFlagRight = h_envChan[1]->encEnvData.addHarmonicFlag; + + payloadbitsCOUPLING = + FDKsbrEnc_CountSbrChannelPairElement (sbrHeaderData, + hParametricStereo, + sbrBitstreamData, + &h_envChan[0]->encEnvData, + &h_envChan[1]->encEnvData, + hCmonData, + h_con->sbrSyntaxFlags); + + + h_envChan[0]->encEnvData.addHarmonicFlag = tempFlagLeft; + h_envChan[1]->encEnvData.addHarmonicFlag = tempFlagRight; + + if (payloadbitsCOUPLING < payloadbitsLR) { + + /* + copy coded coupling envelope and noise data to l/r + */ + for(ch = 0; ch < nChannels;ch++){ + SBR_ENV_TEMP_DATA *ed = &eData[ch]; + FDKmemcpy (ed->sfb_nrg, ed->sfb_nrg_coupling, + MAX_NUM_ENVELOPE_VALUES * sizeof (SCHAR)); + FDKmemcpy (ed->noise_level, ed->noise_level_coupling, + MAX_NUM_NOISE_VALUES * sizeof (SCHAR)); + } + + sbrHeaderData->coupling = 1; + h_envChan[0]->encEnvData.balance = 0; + h_envChan[1]->encEnvData.balance = 1; + } + else{ + /* + restore saved l/r items + */ + for(ch = 0; ch < nChannels;ch++){ + + FDKmemcpy (h_envChan[ch]->sbrCodeEnvelope.sfb_nrg_prev, + sfbNrgPrevTemp[ch], MAX_FREQ_COEFFS * sizeof (SCHAR)); + + h_envChan[ch]->sbrCodeEnvelope.upDate = upDateNrgTemp[ch]; + + FDKmemcpy (h_envChan[ch]->sbrCodeNoiseFloor.sfb_nrg_prev, + noisePrevTemp[ch], MAX_NUM_NOISE_COEFFS * sizeof (SCHAR)); + + FDKmemcpy (h_envChan[ch]->encEnvData.domain_vec,domainVecTemp[ch],sizeof(INT)*MAX_ENVELOPES); + FDKmemcpy (h_envChan[ch]->encEnvData.domain_vec_noise,domainVecNoiseTemp[ch],sizeof(INT)*MAX_ENVELOPES); + + h_envChan[ch]->sbrCodeNoiseFloor.upDate = upDateNoiseTemp[ch]; + } + + sbrHeaderData->coupling = 0; + h_envChan[0]->encEnvData.balance = 0; + h_envChan[1]->encEnvData.balance = 0; + } + } + break; + } /* switch */ + + + /* tell the envelope encoders how long it has been, since we last sent + a frame starting with a dF-coded envelope */ + if (stereoMode == SBR_MONO ) { + if (h_envChan[0]->encEnvData.domain_vec[0] == TIME) + h_envChan[0]->sbrCodeEnvelope.dF_edge_incr_fac++; + else + h_envChan[0]->sbrCodeEnvelope.dF_edge_incr_fac = 0; + } + else { + if (h_envChan[0]->encEnvData.domain_vec[0] == TIME || + h_envChan[1]->encEnvData.domain_vec[0] == TIME) { + h_envChan[0]->sbrCodeEnvelope.dF_edge_incr_fac++; + h_envChan[1]->sbrCodeEnvelope.dF_edge_incr_fac++; + } + else { + h_envChan[0]->sbrCodeEnvelope.dF_edge_incr_fac = 0; + h_envChan[1]->sbrCodeEnvelope.dF_edge_incr_fac = 0; + } + } + + /* + Send the encoded data to the bitstream + */ + for(ch = 0; ch < nChannels;ch++){ + SBR_ENV_TEMP_DATA *ed = &eData[ch]; + c = 0; + for (i = 0; i < ed->nEnvelopes; i++) { + for (j = 0; j < h_envChan[ch]->encEnvData.noScfBands[i]; j++) { + h_envChan[ch]->encEnvData.ienvelope[i][j] = ed->sfb_nrg[c]; + + c++; + } + } + for (i = 0; i < MAX_NUM_NOISE_VALUES; i++){ + h_envChan[ch]->encEnvData.sbr_noise_levels[i] = ed->noise_level[i]; + } + }/* ch */ + + + /* + Write bitstream + */ + if (nChannels == 2) { + FDKsbrEnc_WriteEnvChannelPairElement(sbrHeaderData, + hParametricStereo, + sbrBitstreamData, + &h_envChan[0]->encEnvData, + &h_envChan[1]->encEnvData, + hCmonData, + h_con->sbrSyntaxFlags); + } + else { + FDKsbrEnc_WriteEnvSingleChannelElement(sbrHeaderData, + hParametricStereo, + sbrBitstreamData, + &h_envChan[0]->encEnvData, + hCmonData, + h_con->sbrSyntaxFlags); + } + + /* + * Update buffers. + */ + for (ch=0; ch<nChannels; ch++) + { + int YBufferLength = h_envChan[ch]->sbrExtractEnvelope.no_cols >> h_envChan[ch]->sbrExtractEnvelope.YBufferSzShift; + for (i = 0; i < h_envChan[ch]->sbrExtractEnvelope.YBufferWriteOffset; i++) { + FDKmemcpy(h_envChan[ch]->sbrExtractEnvelope.YBuffer[i], + h_envChan[ch]->sbrExtractEnvelope.YBuffer[i + YBufferLength], + sizeof(FIXP_DBL)*QMF_CHANNELS); + } + h_envChan[ch]->sbrExtractEnvelope.YBufferScale[0] = h_envChan[ch]->sbrExtractEnvelope.YBufferScale[1]; + } + + sbrHeaderData->prev_coupling = sbrHeaderData->coupling; +} + +/***************************************************************************/ +/*! + + \brief creates an envelope extractor handle + + \return error status + +****************************************************************************/ +INT +FDKsbrEnc_CreateExtractSbrEnvelope (HANDLE_SBR_EXTRACT_ENVELOPE hSbrCut, + INT channel + ,INT chInEl + ,UCHAR* dynamic_RAM + ) +{ + INT i; + FIXP_DBL* YBuffer = GetRam_Sbr_envYBuffer(channel); + + FDKmemclear(hSbrCut,sizeof(SBR_EXTRACT_ENVELOPE)); + hSbrCut->p_YBuffer = YBuffer; + + + for (i = 0; i < (QMF_MAX_TIME_SLOTS>>1); i++) { + hSbrCut->YBuffer[i] = YBuffer + (i*QMF_CHANNELS); + } + FIXP_DBL *YBufferDyn = GetRam_Sbr_envYBuffer(chInEl, dynamic_RAM); + INT n=0; + for (; i < QMF_MAX_TIME_SLOTS; i++,n++) { + hSbrCut->YBuffer[i] = YBufferDyn + (n*QMF_CHANNELS); + } + + FIXP_DBL* rBuffer = GetRam_Sbr_envRBuffer(0, dynamic_RAM); + FIXP_DBL* iBuffer = GetRam_Sbr_envIBuffer(0, dynamic_RAM); + + for (i = 0; i < QMF_MAX_TIME_SLOTS; i++) { + hSbrCut->rBuffer[i] = rBuffer + (i*QMF_CHANNELS); + hSbrCut->iBuffer[i] = iBuffer + (i*QMF_CHANNELS); + } + + return 0; +} + + +/***************************************************************************/ +/*! + + \brief Initialize an envelope extractor instance. + + \return error status + +****************************************************************************/ +INT +FDKsbrEnc_InitExtractSbrEnvelope (HANDLE_SBR_EXTRACT_ENVELOPE hSbrCut, + int no_cols, + int no_rows, + int start_index, + int time_slots, + int time_step, + int tran_off, + ULONG statesInitFlag + ,int chInEl + ,UCHAR* dynamic_RAM + ,UINT sbrSyntaxFlags + ) +{ + int YBufferLength, rBufferLength; + int i; + + if (sbrSyntaxFlags & SBR_SYNTAX_LOW_DELAY) { + int off = TRANSIENT_OFFSET_LD; +#ifndef FULL_DELAY + hSbrCut->YBufferWriteOffset = (no_cols>>1)+off*time_step; +#else + hSbrCut->YBufferWriteOffset = no_cols+off*time_step; +#endif + } else + { + hSbrCut->YBufferWriteOffset = tran_off*time_step; + } + hSbrCut->rBufferReadOffset = 0; + + + YBufferLength = hSbrCut->YBufferWriteOffset + no_cols; + rBufferLength = no_cols; + + hSbrCut->pre_transient_info[0] = 0; + hSbrCut->pre_transient_info[1] = 0; + + + hSbrCut->no_cols = no_cols; + hSbrCut->no_rows = no_rows; + hSbrCut->start_index = start_index; + + hSbrCut->time_slots = time_slots; + hSbrCut->time_step = time_step; + + FDK_ASSERT(no_rows <= QMF_CHANNELS); + + /* Use half the Energy values if time step is 2 or greater */ + if (time_step >= 2) + hSbrCut->YBufferSzShift = 1; + else + hSbrCut->YBufferSzShift = 0; + + YBufferLength >>= hSbrCut->YBufferSzShift; + hSbrCut->YBufferWriteOffset >>= hSbrCut->YBufferSzShift; + + FDK_ASSERT(YBufferLength<=QMF_MAX_TIME_SLOTS); + + FIXP_DBL *YBufferDyn = GetRam_Sbr_envYBuffer(chInEl, dynamic_RAM); + INT n=0; + for (i=(QMF_MAX_TIME_SLOTS>>1); i < QMF_MAX_TIME_SLOTS; i++,n++) { + hSbrCut->YBuffer[i] = YBufferDyn + (n*QMF_CHANNELS); + } + + if(statesInitFlag) { + for (i=0; i<YBufferLength; i++) { + FDKmemclear( hSbrCut->YBuffer[i],QMF_CHANNELS*sizeof(FIXP_DBL)); + } + } + + for (i = 0; i < rBufferLength; i++) { + FDKmemclear( hSbrCut->rBuffer[i],QMF_CHANNELS*sizeof(FIXP_DBL)); + FDKmemclear( hSbrCut->iBuffer[i],QMF_CHANNELS*sizeof(FIXP_DBL)); + } + + FDKmemclear (hSbrCut->envelopeCompensation,sizeof(UCHAR)*MAX_FREQ_COEFFS); + + if(statesInitFlag) { + hSbrCut->YBufferScale[0] = hSbrCut->YBufferScale[1] = FRACT_BITS-1; + } + + return (0); +} + + + + +/***************************************************************************/ +/*! + + \brief deinitializes an envelope extractor handle + + \return void + +****************************************************************************/ + +void +FDKsbrEnc_deleteExtractSbrEnvelope (HANDLE_SBR_EXTRACT_ENVELOPE hSbrCut) +{ + + if (hSbrCut) { + FreeRam_Sbr_envYBuffer(&hSbrCut->p_YBuffer); + } +} + +INT +FDKsbrEnc_GetEnvEstDelay(HANDLE_SBR_EXTRACT_ENVELOPE hSbr) +{ + return hSbr->no_rows*((hSbr->YBufferWriteOffset)*2 /* mult 2 because nrg's are grouped half */ + - hSbr->rBufferReadOffset ); /* in reference hold half spec and calc nrg's on overlapped spec */ + +} + + + + |