diff options
Diffstat (limited to 'libSBRenc/src/env_est.cpp')
| -rw-r--r-- | libSBRenc/src/env_est.cpp | 1870 |
1 files changed, 0 insertions, 1870 deletions
diff --git a/libSBRenc/src/env_est.cpp b/libSBRenc/src/env_est.cpp deleted file mode 100644 index e04fc71..0000000 --- a/libSBRenc/src/env_est.cpp +++ /dev/null @@ -1,1870 +0,0 @@ - -/* ----------------------------------------------------------------------------------------------------------- -Software License for The Fraunhofer FDK AAC Codec Library for Android - -© Copyright 1995 - 2013 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); - - /* 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, - const FIXP_DBL nrgSum, - const INT nrgSum_scale, - const 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)); - sc += nrgSum_scale; - - /* 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]; - int envNrg_scale; - 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]; - envNrg_scale = DFRACT_BITS-fNormz((FIXP_DBL)no_of_bands); - - 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>>envNrg_scale); - envNrgRight += (nrgRight>>envNrg_scale); - } /* 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, envNrg_scale, no_of_bands); - if (stereoMode == SBR_COUPLING) { - nrgRight = nmhLoweringEnergy(nrgRight, envNrgRight, envNrg_scale, 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)>>oneBitLess)); - 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; - int sc0, sc1; - - nrgLeft2 = fixMax((FIXP_DBL)0x1, nrgLeft2); - nrgRight = fixMax((FIXP_DBL)0x1, nrgRight); - - sc0 = CountLeadingBits(nrgLeft2); - 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; - - /* 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; - FDK_ASSERT(nChannels <= MAX_NUM_CHANNELS); - 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 */ - -} - - - - |