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diff --git a/fdk-aac/libSBRdec/src/sbr_dec.cpp b/fdk-aac/libSBRdec/src/sbr_dec.cpp new file mode 100644 index 0000000..30611e7 --- /dev/null +++ b/fdk-aac/libSBRdec/src/sbr_dec.cpp @@ -0,0 +1,1480 @@ +/* ----------------------------------------------------------------------------- +Software License for The Fraunhofer FDK AAC Codec Library for Android + +© Copyright 1995 - 2018 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 +----------------------------------------------------------------------------- */ + +/**************************** SBR decoder library ****************************** + + Author(s): + + Description: + +*******************************************************************************/ + +/*! + \file + \brief Sbr decoder + This module provides the actual decoder implementation. The SBR data (side + information) is already decoded. Only three functions are provided: + + \li 1.) createSbrDec(): One time initialization + \li 2.) resetSbrDec(): Called by sbr_Apply() when the information contained in + an SBR_HEADER_ELEMENT requires a reset and recalculation of important SBR + structures. \li 3.) sbr_dec(): The actual decoder. Calls the different tools + such as filterbanks, lppTransposer(), and calculateSbrEnvelope() [the envelope + adjuster]. + + \sa sbr_dec(), \ref documentationOverview +*/ + +#include "sbr_dec.h" + +#include "sbr_ram.h" +#include "env_extr.h" +#include "env_calc.h" +#include "scale.h" +#include "FDK_matrixCalloc.h" +#include "hbe.h" + +#include "genericStds.h" + +#include "sbrdec_drc.h" + +static void copyHarmonicSpectrum(int *xOverQmf, FIXP_DBL **qmfReal, + FIXP_DBL **qmfImag, int noCols, int overlap, + KEEP_STATES_SYNCED_MODE keepStatesSynced) { + int patchBands; + int patch, band, col, target, sourceBands, i; + int numPatches = 0; + int slotOffset = 0; + + FIXP_DBL **ppqmfReal = qmfReal + overlap; + FIXP_DBL **ppqmfImag = qmfImag + overlap; + + if (keepStatesSynced == KEEP_STATES_SYNCED_NORMAL) { + slotOffset = noCols - overlap - LPC_ORDER; + } + + if (keepStatesSynced == KEEP_STATES_SYNCED_OUTDIFF) { + ppqmfReal = qmfReal; + ppqmfImag = qmfImag; + } + + for (i = 1; i < MAX_NUM_PATCHES; i++) { + if (xOverQmf[i] != 0) { + numPatches++; + } + } + + for (patch = (MAX_STRETCH_HBE - 1); patch < numPatches; patch++) { + patchBands = xOverQmf[patch + 1] - xOverQmf[patch]; + target = xOverQmf[patch]; + sourceBands = xOverQmf[MAX_STRETCH_HBE - 1] - xOverQmf[MAX_STRETCH_HBE - 2]; + + while (patchBands > 0) { + int numBands = sourceBands; + int startBand = xOverQmf[MAX_STRETCH_HBE - 1] - 1; + if (target + numBands >= xOverQmf[patch + 1]) { + numBands = xOverQmf[patch + 1] - target; + } + if ((((target + numBands - 1) % 2) + + ((xOverQmf[MAX_STRETCH_HBE - 1] - 1) % 2)) % + 2) { + if (numBands == sourceBands) { + numBands--; + } else { + startBand--; + } + } + if (keepStatesSynced == KEEP_STATES_SYNCED_OUTDIFF) { + for (col = slotOffset; col < overlap + LPC_ORDER; col++) { + i = 0; + for (band = numBands; band > 0; band--) { + if ((target + band - 1 < 64) && + (target + band - 1 < xOverQmf[patch + 1])) { + ppqmfReal[col][target + band - 1] = ppqmfReal[col][startBand - i]; + ppqmfImag[col][target + band - 1] = ppqmfImag[col][startBand - i]; + i++; + } + } + } + } else { + for (col = slotOffset; col < noCols; col++) { + i = 0; + for (band = numBands; band > 0; band--) { + if ((target + band - 1 < 64) && + (target + band - 1 < xOverQmf[patch + 1])) { + ppqmfReal[col][target + band - 1] = ppqmfReal[col][startBand - i]; + ppqmfImag[col][target + band - 1] = ppqmfImag[col][startBand - i]; + i++; + } + } + } + } + target += numBands; + patchBands -= numBands; + } + } +} + +/*! + \brief SBR decoder core function for one channel + + \image html BufferMgmtDetailed-1632.png + + Besides the filter states of the QMF filter bank and the LPC-states of + the LPP-Transposer, processing is mainly based on four buffers: + #timeIn, #timeOut, #WorkBuffer2 and #OverlapBuffer. The #WorkBuffer2 + is reused for all channels and might be used by the core decoder, a + static overlap buffer is required for each channel. Due to in-place + processing, #timeIn and #timeOut point to identical locations. + + The spectral data is organized in so-called slots. Each slot + contains 64 bands of complex data. The number of slots per frame + depends on the frame size. For mp3PRO, there are 18 slots per frame + and 6 slots per #OverlapBuffer. It is not necessary to have the slots + in located consecutive address ranges. + + To optimize memory usage and to minimize the number of memory + accesses, the memory management is organized as follows (slot numbers + based on mp3PRO): + + 1.) Input time domain signal is located in #timeIn. The last slots + (0..5) of the spectral data of the previous frame are located in the + #OverlapBuffer. In addition, #frameData of the current frame resides + in the upper part of #timeIn. + + 2.) During the cplxAnalysisQmfFiltering(), 32 samples from #timeIn are + transformed into a slot of up to 32 complex spectral low band values at a + time. The first spectral slot -- nr. 6 -- is written at slot number + zero of #WorkBuffer2. #WorkBuffer2 will be completely filled with + spectral data. + + 3.) LPP-Transposition in lppTransposer() is processed on 24 slots. During the + transposition, the high band part of the spectral data is replicated + based on the low band data. + + Envelope Adjustment is processed on the high band part of the spectral + data only by calculateSbrEnvelope(). + + 4.) The cplxSynthesisQmfFiltering() creates 64 time domain samples out + of a slot of 64 complex spectral values at a time. The first 6 slots + in #timeOut are filled from the results of spectral slots 0..5 in the + #OverlapBuffer. The consecutive slots in timeOut are now filled with + the results of spectral slots 6..17. + + 5.) The preprocessed slots 18..23 have to be stored in the + #OverlapBuffer. + +*/ + +void sbr_dec( + HANDLE_SBR_DEC hSbrDec, /*!< handle to Decoder channel */ + INT_PCM *timeIn, /*!< pointer to input time signal */ + INT_PCM *timeOut, /*!< pointer to output time signal */ + HANDLE_SBR_DEC hSbrDecRight, /*!< handle to Decoder channel right */ + INT_PCM *timeOutRight, /*!< pointer to output time signal */ + const int strideOut, /*!< Time data traversal strideOut */ + HANDLE_SBR_HEADER_DATA hHeaderData, /*!< Static control data */ + HANDLE_SBR_FRAME_DATA hFrameData, /*!< Control data of current frame */ + HANDLE_SBR_PREV_FRAME_DATA + hPrevFrameData, /*!< Some control data of last frame */ + const int applyProcessing, /*!< Flag for SBR operation */ + HANDLE_PS_DEC h_ps_d, const UINT flags, const int codecFrameSize) { + int i, slot, reserve; + int saveLbScale; + int lastSlotOffs; + FIXP_DBL maxVal; + + /* temporary pointer / variable for QMF; + required as we want to use temporary buffer + creating one frame delay for HBE in LP mode */ + INT_PCM *pTimeInQmf = timeIn; + + /* Number of QMF timeslots in the overlap buffer: */ + int ov_len = hSbrDec->LppTrans.pSettings->overlap; + + /* Number of QMF slots per frame */ + int noCols = hHeaderData->numberTimeSlots * hHeaderData->timeStep; + + /* create pointer array for data to use for HBE and legacy sbr */ + FIXP_DBL *pLowBandReal[(3 * 4) + 2 * ((1024) / (32) * (4) / 2)]; + FIXP_DBL *pLowBandImag[(3 * 4) + 2 * ((1024) / (32) * (4) / 2)]; + + /* set pReal to where QMF analysis writes in case of legacy SBR */ + FIXP_DBL **pReal = pLowBandReal + ov_len; + FIXP_DBL **pImag = pLowBandImag + ov_len; + + /* map QMF buffer to pointer array (Overlap + Frame)*/ + for (i = 0; i < noCols + ov_len; i++) { + pLowBandReal[i] = hSbrDec->qmfDomainInCh->hQmfSlotsReal[i]; + pLowBandImag[i] = hSbrDec->qmfDomainInCh->hQmfSlotsImag[i]; + } + + if ((flags & SBRDEC_USAC_HARMONICSBR)) { + /* in case of harmonic SBR and no HBE_LP map additional buffer for + one more frame to pointer arry */ + for (i = 0; i < noCols; i++) { + pLowBandReal[i + noCols + ov_len] = hSbrDec->hQmfHBESlotsReal[i]; + pLowBandImag[i + noCols + ov_len] = hSbrDec->hQmfHBESlotsImag[i]; + } + + /* shift scale values according to buffer */ + hSbrDec->scale_ov = hSbrDec->scale_lb; + hSbrDec->scale_lb = hSbrDec->scale_hbe; + + /* set pReal to where QMF analysis writes in case of HBE */ + pReal += noCols; + pImag += noCols; + if (flags & SBRDEC_SKIP_QMF_ANA) { + /* stereoCfgIndex3 with HBE */ + FDK_QmfDomain_QmfData2HBE(hSbrDec->qmfDomainInCh, + hSbrDec->hQmfHBESlotsReal, + hSbrDec->hQmfHBESlotsImag); + } else { + /* We have to move old hbe frame data to lb area of buffer */ + for (i = 0; i < noCols; i++) { + FDKmemcpy(pLowBandReal[ov_len + i], hSbrDec->hQmfHBESlotsReal[i], + hHeaderData->numberOfAnalysisBands * sizeof(FIXP_DBL)); + FDKmemcpy(pLowBandImag[ov_len + i], hSbrDec->hQmfHBESlotsImag[i], + hHeaderData->numberOfAnalysisBands * sizeof(FIXP_DBL)); + } + } + } + + /* + low band codec signal subband filtering + */ + + if (flags & SBRDEC_SKIP_QMF_ANA) { + if (!(flags & SBRDEC_USAC_HARMONICSBR)) /* stereoCfgIndex3 w/o HBE */ + FDK_QmfDomain_WorkBuffer2ProcChannel(hSbrDec->qmfDomainInCh); + } else { + C_AALLOC_SCRATCH_START(qmfTemp, FIXP_DBL, 2 * (64)); + qmfAnalysisFiltering(&hSbrDec->qmfDomainInCh->fb, pReal, pImag, + &hSbrDec->qmfDomainInCh->scaling, pTimeInQmf, 0, 1, + qmfTemp); + + C_AALLOC_SCRATCH_END(qmfTemp, FIXP_DBL, 2 * (64)); + } + + /* + Clear upper half of spectrum + */ + if (!((flags & SBRDEC_USAC_HARMONICSBR) && + (hFrameData->sbrPatchingMode == 0))) { + int nAnalysisBands = hHeaderData->numberOfAnalysisBands; + + if (!(flags & SBRDEC_LOW_POWER)) { + for (slot = ov_len; slot < noCols + ov_len; slot++) { + FDKmemclear(&pLowBandReal[slot][nAnalysisBands], + ((64) - nAnalysisBands) * sizeof(FIXP_DBL)); + FDKmemclear(&pLowBandImag[slot][nAnalysisBands], + ((64) - nAnalysisBands) * sizeof(FIXP_DBL)); + } + } else { + for (slot = ov_len; slot < noCols + ov_len; slot++) { + FDKmemclear(&pLowBandReal[slot][nAnalysisBands], + ((64) - nAnalysisBands) * sizeof(FIXP_DBL)); + } + } + } + + /* + Shift spectral data left to gain accuracy in transposer and adjustor + */ + /* Range was increased from lsb to no_channels because in some cases (e.g. + USAC conf eSbr_4_Pvc.mp4 and some HBE cases) it could be observed that the + signal between lsb and no_channels is used for the patching process. + */ + maxVal = maxSubbandSample(pReal, (flags & SBRDEC_LOW_POWER) ? NULL : pImag, 0, + hSbrDec->qmfDomainInCh->fb.no_channels, 0, noCols); + + reserve = fixMax(0, CntLeadingZeros(maxVal) - 1); + reserve = fixMin(reserve, + DFRACT_BITS - 1 - hSbrDec->qmfDomainInCh->scaling.lb_scale); + + /* If all data is zero, lb_scale could become too large */ + rescaleSubbandSamples(pReal, (flags & SBRDEC_LOW_POWER) ? NULL : pImag, 0, + hSbrDec->qmfDomainInCh->fb.no_channels, 0, noCols, + reserve); + + hSbrDec->qmfDomainInCh->scaling.lb_scale += reserve; + + if ((flags & SBRDEC_USAC_HARMONICSBR)) { + /* actually this is our hbe_scale */ + hSbrDec->scale_hbe = hSbrDec->qmfDomainInCh->scaling.lb_scale; + /* the real lb_scale is stored in scale_lb from sbr */ + hSbrDec->qmfDomainInCh->scaling.lb_scale = hSbrDec->scale_lb; + } + /* + save low band scale, wavecoding or parametric stereo may modify it + */ + saveLbScale = hSbrDec->qmfDomainInCh->scaling.lb_scale; + + if (applyProcessing) { + UCHAR *borders = hFrameData->frameInfo.borders; + lastSlotOffs = borders[hFrameData->frameInfo.nEnvelopes] - + hHeaderData->numberTimeSlots; + + FIXP_DBL degreeAlias[(64)]; + PVC_DYNAMIC_DATA pvcDynamicData; + pvcInitFrame( + &hSbrDec->PvcStaticData, &pvcDynamicData, + (hHeaderData->frameErrorFlag ? 0 : hHeaderData->bs_info.pvc_mode), + hFrameData->ns, hHeaderData->timeStep, + hHeaderData->freqBandData.lowSubband, + hFrameData->frameInfo.pvcBorders[0], hFrameData->pvcID); + + if (!hHeaderData->frameErrorFlag && (hHeaderData->bs_info.pvc_mode > 0)) { + pvcDecodeFrame(&hSbrDec->PvcStaticData, &pvcDynamicData, pLowBandReal, + pLowBandImag, ov_len, + SCALE2EXP(hSbrDec->qmfDomainInCh->scaling.ov_lb_scale), + SCALE2EXP(hSbrDec->qmfDomainInCh->scaling.lb_scale)); + } + pvcEndFrame(&hSbrDec->PvcStaticData, &pvcDynamicData); + + /* The transposer will override most values in degreeAlias[]. + The array needs to be cleared at least from lowSubband to highSubband + before. */ + if (flags & SBRDEC_LOW_POWER) + FDKmemclear(°reeAlias[hHeaderData->freqBandData.lowSubband], + (hHeaderData->freqBandData.highSubband - + hHeaderData->freqBandData.lowSubband) * + sizeof(FIXP_DBL)); + + /* + Inverse filtering of lowband and transposition into the SBR-frequency + range + */ + + { + KEEP_STATES_SYNCED_MODE keepStatesSyncedMode = + ((flags & SBRDEC_USAC_HARMONICSBR) && + (hFrameData->sbrPatchingMode != 0)) + ? KEEP_STATES_SYNCED_NORMAL + : KEEP_STATES_SYNCED_OFF; + + if (flags & SBRDEC_USAC_HARMONICSBR) { + if (flags & SBRDEC_QUAD_RATE) { + pReal -= 32; + pImag -= 32; + } + + if ((hSbrDec->savedStates == 0) && (hFrameData->sbrPatchingMode == 1)) { + /* copy saved states from previous frame to legacy SBR lpc filterstate + * buffer */ + for (i = 0; i < LPC_ORDER + ov_len; i++) { + FDKmemcpy( + hSbrDec->LppTrans.lpcFilterStatesRealLegSBR[i], + hSbrDec->codecQMFBufferReal[noCols - LPC_ORDER - ov_len + i], + hSbrDec->hHBE->noChannels * sizeof(FIXP_DBL)); + FDKmemcpy( + hSbrDec->LppTrans.lpcFilterStatesImagLegSBR[i], + hSbrDec->codecQMFBufferImag[noCols - LPC_ORDER - ov_len + i], + hSbrDec->hHBE->noChannels * sizeof(FIXP_DBL)); + } + } + + /* saving unmodified QMF states in case we are switching from legacy SBR + * to HBE */ + for (i = 0; i < hSbrDec->hHBE->noCols; i++) { + FDKmemcpy(hSbrDec->codecQMFBufferReal[i], pLowBandReal[ov_len + i], + hSbrDec->hHBE->noChannels * sizeof(FIXP_DBL)); + FDKmemcpy(hSbrDec->codecQMFBufferImag[i], pLowBandImag[ov_len + i], + hSbrDec->hHBE->noChannels * sizeof(FIXP_DBL)); + } + + QmfTransposerApply( + hSbrDec->hHBE, pReal, pImag, noCols, pLowBandReal, pLowBandImag, + hSbrDec->LppTrans.lpcFilterStatesRealHBE, + hSbrDec->LppTrans.lpcFilterStatesImagHBE, + hFrameData->sbrPitchInBins, hSbrDec->scale_lb, hSbrDec->scale_hbe, + &hSbrDec->qmfDomainInCh->scaling.hb_scale, hHeaderData->timeStep, + borders[0], ov_len, keepStatesSyncedMode); + + if (flags & SBRDEC_QUAD_RATE) { + int *xOverQmf = GetxOverBandQmfTransposer(hSbrDec->hHBE); + + copyHarmonicSpectrum(xOverQmf, pLowBandReal, pLowBandImag, noCols, + ov_len, keepStatesSyncedMode); + } + } + } + + if ((flags & SBRDEC_USAC_HARMONICSBR) && + (hFrameData->sbrPatchingMode == 0)) { + hSbrDec->prev_frame_lSbr = 0; + hSbrDec->prev_frame_hbeSbr = 1; + + lppTransposerHBE( + &hSbrDec->LppTrans, hSbrDec->hHBE, &hSbrDec->qmfDomainInCh->scaling, + pLowBandReal, pLowBandImag, hHeaderData->timeStep, borders[0], + lastSlotOffs, hHeaderData->freqBandData.nInvfBands, + hFrameData->sbr_invf_mode, hPrevFrameData->sbr_invf_mode); + + } else { + if (flags & SBRDEC_USAC_HARMONICSBR) { + for (i = 0; i < LPC_ORDER + hSbrDec->LppTrans.pSettings->overlap; i++) { + /* + Store the unmodified qmf Slots values for upper part of spectrum + (required for LPC filtering) required if next frame is a HBE frame + */ + FDKmemcpy(hSbrDec->LppTrans.lpcFilterStatesRealHBE[i], + hSbrDec->qmfDomainInCh + ->hQmfSlotsReal[hSbrDec->hHBE->noCols - LPC_ORDER + i], + (64) * sizeof(FIXP_DBL)); + FDKmemcpy(hSbrDec->LppTrans.lpcFilterStatesImagHBE[i], + hSbrDec->qmfDomainInCh + ->hQmfSlotsImag[hSbrDec->hHBE->noCols - LPC_ORDER + i], + (64) * sizeof(FIXP_DBL)); + } + } + { + hSbrDec->prev_frame_lSbr = 1; + hSbrDec->prev_frame_hbeSbr = 0; + } + + lppTransposer( + &hSbrDec->LppTrans, &hSbrDec->qmfDomainInCh->scaling, pLowBandReal, + degreeAlias, // only used if useLP = 1 + pLowBandImag, flags & SBRDEC_LOW_POWER, + hHeaderData->bs_info.sbr_preprocessing, + hHeaderData->freqBandData.v_k_master[0], hHeaderData->timeStep, + borders[0], lastSlotOffs, hHeaderData->freqBandData.nInvfBands, + hFrameData->sbr_invf_mode, hPrevFrameData->sbr_invf_mode); + } + + /* + Adjust envelope of current frame. + */ + + if ((hFrameData->sbrPatchingMode != + hSbrDec->SbrCalculateEnvelope.sbrPatchingMode)) { + ResetLimiterBands(hHeaderData->freqBandData.limiterBandTable, + &hHeaderData->freqBandData.noLimiterBands, + hHeaderData->freqBandData.freqBandTable[0], + hHeaderData->freqBandData.nSfb[0], + hSbrDec->LppTrans.pSettings->patchParam, + hSbrDec->LppTrans.pSettings->noOfPatches, + hHeaderData->bs_data.limiterBands, + hFrameData->sbrPatchingMode, + (flags & SBRDEC_USAC_HARMONICSBR) && + (hFrameData->sbrPatchingMode == 0) + ? GetxOverBandQmfTransposer(hSbrDec->hHBE) + : NULL, + Get41SbrQmfTransposer(hSbrDec->hHBE)); + + hSbrDec->SbrCalculateEnvelope.sbrPatchingMode = + hFrameData->sbrPatchingMode; + } + + calculateSbrEnvelope( + &hSbrDec->qmfDomainInCh->scaling, &hSbrDec->SbrCalculateEnvelope, + hHeaderData, hFrameData, &pvcDynamicData, pLowBandReal, pLowBandImag, + flags & SBRDEC_LOW_POWER, + + degreeAlias, flags, + (hHeaderData->frameErrorFlag || hPrevFrameData->frameErrorFlag)); + +#if (SBRDEC_MAX_HB_FADE_FRAMES > 0) + /* Avoid hard onsets of high band */ + if (hHeaderData->frameErrorFlag) { + if (hSbrDec->highBandFadeCnt < SBRDEC_MAX_HB_FADE_FRAMES) { + hSbrDec->highBandFadeCnt += 1; + } + } else { + if (hSbrDec->highBandFadeCnt > + 0) { /* Manipulate high band scale factor to get a smooth fade-in */ + hSbrDec->qmfDomainInCh->scaling.hb_scale += hSbrDec->highBandFadeCnt; + hSbrDec->qmfDomainInCh->scaling.hb_scale = + fMin(hSbrDec->qmfDomainInCh->scaling.hb_scale, DFRACT_BITS - 1); + hSbrDec->highBandFadeCnt -= 1; + } + } + +#endif + /* + Update hPrevFrameData (to be used in the next frame) + */ + for (i = 0; i < hHeaderData->freqBandData.nInvfBands; i++) { + hPrevFrameData->sbr_invf_mode[i] = hFrameData->sbr_invf_mode[i]; + } + hPrevFrameData->coupling = hFrameData->coupling; + hPrevFrameData->stopPos = borders[hFrameData->frameInfo.nEnvelopes]; + hPrevFrameData->ampRes = hFrameData->ampResolutionCurrentFrame; + hPrevFrameData->prevSbrPitchInBins = hFrameData->sbrPitchInBins; + /* could be done in extractFrameInfo_pvc() but hPrevFrameData is not + * available there */ + FDKmemcpy(&hPrevFrameData->prevFrameInfo, &hFrameData->frameInfo, + sizeof(FRAME_INFO)); + } else { + /* rescale from lsb to nAnalysisBands in order to compensate scaling with + * hb_scale in this area, done by synthesisFiltering*/ + int rescale; + int lsb; + int length; + + /* Reset hb_scale if no highband is present, because hb_scale is considered + * in the QMF-synthesis */ + hSbrDec->qmfDomainInCh->scaling.hb_scale = saveLbScale; + + rescale = hSbrDec->qmfDomainInCh->scaling.hb_scale - + hSbrDec->qmfDomainInCh->scaling.ov_lb_scale; + lsb = hSbrDec->qmfDomainOutCh->fb.lsb; + length = (hSbrDec->qmfDomainInCh->fb.no_channels - lsb); + + if ((rescale < 0) && (length > 0)) { + if (!(flags & SBRDEC_LOW_POWER)) { + for (i = 0; i < ov_len; i++) { + scaleValues(&pLowBandReal[i][lsb], length, rescale); + scaleValues(&pLowBandImag[i][lsb], length, rescale); + } + } else { + for (i = 0; i < ov_len; i++) { + scaleValues(&pLowBandReal[i][lsb], length, rescale); + } + } + } + } + + if (!(flags & SBRDEC_USAC_HARMONICSBR)) { + int length = hSbrDec->qmfDomainInCh->fb.lsb; + if (flags & SBRDEC_SYNTAX_USAC) { + length = hSbrDec->qmfDomainInCh->fb.no_channels; + } + + /* in case of legacy sbr saving of filter states here */ + for (i = 0; i < LPC_ORDER + ov_len; i++) { + /* + Store the unmodified qmf Slots values (required for LPC filtering) + */ + if (!(flags & SBRDEC_LOW_POWER)) { + FDKmemcpy(hSbrDec->LppTrans.lpcFilterStatesRealLegSBR[i], + pLowBandReal[noCols - LPC_ORDER + i], + length * sizeof(FIXP_DBL)); + FDKmemcpy(hSbrDec->LppTrans.lpcFilterStatesImagLegSBR[i], + pLowBandImag[noCols - LPC_ORDER + i], + length * sizeof(FIXP_DBL)); + } else + FDKmemcpy(hSbrDec->LppTrans.lpcFilterStatesRealLegSBR[i], + pLowBandReal[noCols - LPC_ORDER + i], + length * sizeof(FIXP_DBL)); + } + } + + /* + Synthesis subband filtering. + */ + + if (!(flags & SBRDEC_PS_DECODED)) { + if (!(flags & SBRDEC_SKIP_QMF_SYN)) { + int outScalefactor = 0; + + if (h_ps_d != NULL) { + h_ps_d->procFrameBased = 1; /* we here do frame based processing */ + } + + sbrDecoder_drcApply(&hSbrDec->sbrDrcChannel, pLowBandReal, + (flags & SBRDEC_LOW_POWER) ? NULL : pLowBandImag, + hSbrDec->qmfDomainOutCh->fb.no_col, &outScalefactor); + + qmfChangeOutScalefactor(&hSbrDec->qmfDomainOutCh->fb, outScalefactor); + + { + HANDLE_FREQ_BAND_DATA hFreq = &hHeaderData->freqBandData; + int save_usb = hSbrDec->qmfDomainOutCh->fb.usb; + +#if (QMF_MAX_SYNTHESIS_BANDS <= 64) + C_AALLOC_SCRATCH_START(qmfTemp, FIXP_DBL, 2 * QMF_MAX_SYNTHESIS_BANDS); +#else + C_AALLOC_STACK_START(qmfTemp, FIXP_DBL, 2 * QMF_MAX_SYNTHESIS_BANDS); +#endif + if (hSbrDec->qmfDomainOutCh->fb.usb < hFreq->ov_highSubband) { + /* we need to patch usb for this frame as overlap may contain higher + frequency range if headerchange occured; fb. usb is always limited + to maximum fb.no_channels; In case of wrongly decoded headers it + might be that ov_highSubband is higher than the number of synthesis + channels (fb.no_channels), which is forbidden, therefore we need to + limit ov_highSubband with fMin function to avoid not allowed usb in + synthesis filterbank. */ + hSbrDec->qmfDomainOutCh->fb.usb = + fMin((UINT)hFreq->ov_highSubband, + (UINT)hSbrDec->qmfDomainOutCh->fb.no_channels); + } + { + qmfSynthesisFiltering( + &hSbrDec->qmfDomainOutCh->fb, pLowBandReal, + (flags & SBRDEC_LOW_POWER) ? NULL : pLowBandImag, + &hSbrDec->qmfDomainInCh->scaling, + hSbrDec->LppTrans.pSettings->overlap, timeOut, strideOut, + qmfTemp); + } + /* restore saved value */ + hSbrDec->qmfDomainOutCh->fb.usb = save_usb; + hFreq->ov_highSubband = save_usb; +#if (QMF_MAX_SYNTHESIS_BANDS <= 64) + C_AALLOC_SCRATCH_END(qmfTemp, FIXP_DBL, 2 * QMF_MAX_SYNTHESIS_BANDS); +#else + C_AALLOC_STACK_END(qmfTemp, FIXP_DBL, 2 * QMF_MAX_SYNTHESIS_BANDS); +#endif + } + } + + } else { /* (flags & SBRDEC_PS_DECODED) */ + INT sdiff; + INT scaleFactorHighBand, scaleFactorLowBand_ov, scaleFactorLowBand_no_ov; + + HANDLE_QMF_FILTER_BANK synQmf = &hSbrDec->qmfDomainOutCh->fb; + HANDLE_QMF_FILTER_BANK synQmfRight = &hSbrDecRight->qmfDomainOutCh->fb; + + /* adapt scaling */ + sdiff = hSbrDec->qmfDomainInCh->scaling.lb_scale - + reserve; /* Scaling difference */ + scaleFactorHighBand = sdiff - hSbrDec->qmfDomainInCh->scaling.hb_scale; + scaleFactorLowBand_ov = sdiff - hSbrDec->qmfDomainInCh->scaling.ov_lb_scale; + scaleFactorLowBand_no_ov = sdiff - hSbrDec->qmfDomainInCh->scaling.lb_scale; + + /* Scale of low band overlapping QMF data */ + scaleFactorLowBand_ov = + fMin(DFRACT_BITS - 1, fMax(-(DFRACT_BITS - 1), scaleFactorLowBand_ov)); + /* Scale of low band current QMF data */ + scaleFactorLowBand_no_ov = fMin( + DFRACT_BITS - 1, fMax(-(DFRACT_BITS - 1), scaleFactorLowBand_no_ov)); + /* Scale of current high band */ + scaleFactorHighBand = + fMin(DFRACT_BITS - 1, fMax(-(DFRACT_BITS - 1), scaleFactorHighBand)); + + if (h_ps_d->procFrameBased == 1) /* If we have switched from frame to slot + based processing copy filter states */ + { /* procFrameBased will be unset later */ + /* copy filter states from left to right */ + /* was ((640)-(64))*sizeof(FIXP_QSS) + flexible amount of synthesis bands needed for QMF based resampling + */ + FDK_ASSERT(hSbrDec->qmfDomainInCh->pGlobalConf->nBandsSynthesis <= + QMF_MAX_SYNTHESIS_BANDS); + FDKmemcpy(synQmfRight->FilterStates, synQmf->FilterStates, + 9 * hSbrDec->qmfDomainInCh->pGlobalConf->nBandsSynthesis * + sizeof(FIXP_QSS)); + } + + /* Feed delaylines when parametric stereo is switched on. */ + PreparePsProcessing(h_ps_d, pLowBandReal, pLowBandImag, + scaleFactorLowBand_ov); + + /* use the same synthese qmf values for left and right channel */ + synQmfRight->no_col = synQmf->no_col; + synQmfRight->lsb = synQmf->lsb; + synQmfRight->usb = synQmf->usb; + + int env = 0; + + { +#if (QMF_MAX_SYNTHESIS_BANDS <= 64) + C_AALLOC_SCRATCH_START(pWorkBuffer, FIXP_DBL, + 2 * QMF_MAX_SYNTHESIS_BANDS); +#else + C_AALLOC_STACK_START(pWorkBuffer, FIXP_DBL, 2 * QMF_MAX_SYNTHESIS_BANDS); +#endif + + int maxShift = 0; + + if (hSbrDec->sbrDrcChannel.enable != 0) { + if (hSbrDec->sbrDrcChannel.prevFact_exp > maxShift) { + maxShift = hSbrDec->sbrDrcChannel.prevFact_exp; + } + if (hSbrDec->sbrDrcChannel.currFact_exp > maxShift) { + maxShift = hSbrDec->sbrDrcChannel.currFact_exp; + } + if (hSbrDec->sbrDrcChannel.nextFact_exp > maxShift) { + maxShift = hSbrDec->sbrDrcChannel.nextFact_exp; + } + } + + /* copy DRC data to right channel (with PS both channels use the same DRC + * gains) */ + FDKmemcpy(&hSbrDecRight->sbrDrcChannel, &hSbrDec->sbrDrcChannel, + sizeof(SBRDEC_DRC_CHANNEL)); + + for (i = 0; i < synQmf->no_col; i++) { /* ----- no_col loop ----- */ + + INT outScalefactorR, outScalefactorL; + + /* qmf timeslot of right channel */ + FIXP_DBL *rQmfReal = pWorkBuffer; + FIXP_DBL *rQmfImag = pWorkBuffer + synQmf->no_channels; + + { + if (i == + h_ps_d->bsData[h_ps_d->processSlot].mpeg.aEnvStartStop[env]) { + initSlotBasedRotation(h_ps_d, env, + hHeaderData->freqBandData.highSubband); + env++; + } + + ApplyPsSlot( + h_ps_d, /* parametric stereo decoder handle */ + (pLowBandReal + i), /* one timeslot of left/mono channel */ + (pLowBandImag + i), /* one timeslot of left/mono channel */ + rQmfReal, /* one timeslot or right channel */ + rQmfImag, /* one timeslot or right channel */ + scaleFactorLowBand_no_ov, + (i < hSbrDec->LppTrans.pSettings->overlap) + ? scaleFactorLowBand_ov + : scaleFactorLowBand_no_ov, + scaleFactorHighBand, synQmf->lsb, synQmf->usb); + + outScalefactorL = outScalefactorR = 1; /* psDiffScale! (MPEG-PS) */ + } + + sbrDecoder_drcApplySlot(/* right channel */ + &hSbrDecRight->sbrDrcChannel, rQmfReal, + rQmfImag, i, synQmfRight->no_col, maxShift); + + outScalefactorR += maxShift; + + sbrDecoder_drcApplySlot(/* left channel */ + &hSbrDec->sbrDrcChannel, *(pLowBandReal + i), + *(pLowBandImag + i), i, synQmf->no_col, + maxShift); + + outScalefactorL += maxShift; + + if (!(flags & SBRDEC_SKIP_QMF_SYN)) { + qmfSynthesisFilteringSlot( + synQmfRight, rQmfReal, /* QMF real buffer */ + rQmfImag, /* QMF imag buffer */ + outScalefactorL, outScalefactorL, + timeOutRight + (i * synQmf->no_channels * strideOut), strideOut, + pWorkBuffer); + + qmfSynthesisFilteringSlot( + synQmf, *(pLowBandReal + i), /* QMF real buffer */ + *(pLowBandImag + i), /* QMF imag buffer */ + outScalefactorR, outScalefactorR, + timeOut + (i * synQmf->no_channels * strideOut), strideOut, + pWorkBuffer); + } + } /* no_col loop i */ +#if (QMF_MAX_SYNTHESIS_BANDS <= 64) + C_AALLOC_SCRATCH_END(pWorkBuffer, FIXP_DBL, 2 * QMF_MAX_SYNTHESIS_BANDS); +#else + C_AALLOC_STACK_END(pWorkBuffer, FIXP_DBL, 2 * QMF_MAX_SYNTHESIS_BANDS); +#endif + } + } + + sbrDecoder_drcUpdateChannel(&hSbrDec->sbrDrcChannel); + + /* + Update overlap buffer + Even bands above usb are copied to avoid outdated spectral data in case + the stop frequency raises. + */ + + if (!(flags & SBRDEC_SKIP_QMF_SYN)) { + { + FDK_QmfDomain_SaveOverlap(hSbrDec->qmfDomainInCh, 0); + FDK_ASSERT(hSbrDec->qmfDomainInCh->scaling.ov_lb_scale == saveLbScale); + } + } + + hSbrDec->savedStates = 0; + + /* Save current frame status */ + hPrevFrameData->frameErrorFlag = hHeaderData->frameErrorFlag; + hSbrDec->applySbrProc_old = applyProcessing; + +} /* sbr_dec() */ + +/*! + \brief Creates sbr decoder structure + \return errorCode, 0 if successful +*/ +SBR_ERROR +createSbrDec(SBR_CHANNEL *hSbrChannel, + HANDLE_SBR_HEADER_DATA hHeaderData, /*!< Static control data */ + TRANSPOSER_SETTINGS *pSettings, + const int downsampleFac, /*!< Downsampling factor */ + const UINT qmfFlags, /*!< flags -> 1: HQ/LP selector, 2: CLDFB */ + const UINT flags, const int overlap, + int chan, /*!< Channel for which to assign buffers etc. */ + int codecFrameSize) + +{ + SBR_ERROR err = SBRDEC_OK; + int timeSlots = + hHeaderData->numberTimeSlots; /* Number of SBR slots per frame */ + int noCols = + timeSlots * hHeaderData->timeStep; /* Number of QMF slots per frame */ + HANDLE_SBR_DEC hs = &(hSbrChannel->SbrDec); + +#if (SBRDEC_MAX_HB_FADE_FRAMES > 0) + hs->highBandFadeCnt = SBRDEC_MAX_HB_FADE_FRAMES; + +#endif + hs->scale_hbe = 15; + hs->scale_lb = 15; + hs->scale_ov = 15; + + hs->prev_frame_lSbr = 0; + hs->prev_frame_hbeSbr = 0; + + hs->codecFrameSize = codecFrameSize; + + /* + create envelope calculator + */ + err = createSbrEnvelopeCalc(&hs->SbrCalculateEnvelope, hHeaderData, chan, + flags); + if (err != SBRDEC_OK) { + return err; + } + + initSbrPrevFrameData(&hSbrChannel->prevFrameData, timeSlots); + + /* + create transposer + */ + err = createLppTransposer( + &hs->LppTrans, pSettings, hHeaderData->freqBandData.lowSubband, + hHeaderData->freqBandData.v_k_master, hHeaderData->freqBandData.numMaster, + hHeaderData->freqBandData.highSubband, timeSlots, noCols, + hHeaderData->freqBandData.freqBandTableNoise, + hHeaderData->freqBandData.nNfb, hHeaderData->sbrProcSmplRate, chan, + overlap); + if (err != SBRDEC_OK) { + return err; + } + + if (flags & SBRDEC_USAC_HARMONICSBR) { + int noChannels, bSbr41 = flags & SBRDEC_QUAD_RATE ? 1 : 0; + + noChannels = + QMF_SYNTH_CHANNELS / + ((bSbr41 + 1) * 2); /* 32 for (32:64 and 24:64) and 16 for 16:64 */ + + /* shared memory between hbeLightTimeDelayBuffer and hQmfHBESlotsReal if + * SBRDEC_HBE_ENABLE */ + hSbrChannel->SbrDec.tmp_memory = (FIXP_DBL **)fdkCallocMatrix2D_aligned( + noCols, noChannels, sizeof(FIXP_DBL)); + if (hSbrChannel->SbrDec.tmp_memory == NULL) { + return SBRDEC_MEM_ALLOC_FAILED; + } + + hSbrChannel->SbrDec.hQmfHBESlotsReal = hSbrChannel->SbrDec.tmp_memory; + hSbrChannel->SbrDec.hQmfHBESlotsImag = + (FIXP_DBL **)fdkCallocMatrix2D_aligned(noCols, noChannels, + sizeof(FIXP_DBL)); + if (hSbrChannel->SbrDec.hQmfHBESlotsImag == NULL) { + return SBRDEC_MEM_ALLOC_FAILED; + } + + /* buffers containing unmodified qmf data; required when switching from + * legacy SBR to HBE */ + /* buffer can be used as LPCFilterstates buffer because legacy SBR needs + * exactly these values for LPC filtering */ + hSbrChannel->SbrDec.codecQMFBufferReal = + (FIXP_DBL **)fdkCallocMatrix2D_aligned(noCols, noChannels, + sizeof(FIXP_DBL)); + if (hSbrChannel->SbrDec.codecQMFBufferReal == NULL) { + return SBRDEC_MEM_ALLOC_FAILED; + } + + hSbrChannel->SbrDec.codecQMFBufferImag = + (FIXP_DBL **)fdkCallocMatrix2D_aligned(noCols, noChannels, + sizeof(FIXP_DBL)); + if (hSbrChannel->SbrDec.codecQMFBufferImag == NULL) { + return SBRDEC_MEM_ALLOC_FAILED; + } + + err = QmfTransposerCreate(&hs->hHBE, codecFrameSize, 0, bSbr41); + if (err != SBRDEC_OK) { + return err; + } + } + + return err; +} + +/*! + \brief Delete sbr decoder structure + \return errorCode, 0 if successful +*/ +int deleteSbrDec(SBR_CHANNEL *hSbrChannel) { + HANDLE_SBR_DEC hs = &hSbrChannel->SbrDec; + + deleteSbrEnvelopeCalc(&hs->SbrCalculateEnvelope); + + if (hs->tmp_memory != NULL) { + FDK_FREE_MEMORY_2D_ALIGNED(hs->tmp_memory); + } + + /* modify here */ + FDK_FREE_MEMORY_2D_ALIGNED(hs->hQmfHBESlotsImag); + + if (hs->hHBE != NULL) QmfTransposerClose(hs->hHBE); + + if (hs->codecQMFBufferReal != NULL) { + FDK_FREE_MEMORY_2D_ALIGNED(hs->codecQMFBufferReal); + } + + if (hs->codecQMFBufferImag != NULL) { + FDK_FREE_MEMORY_2D_ALIGNED(hs->codecQMFBufferImag); + } + + return 0; +} + +/*! + \brief resets sbr decoder structure + \return errorCode, 0 if successful +*/ +SBR_ERROR +resetSbrDec(HANDLE_SBR_DEC hSbrDec, HANDLE_SBR_HEADER_DATA hHeaderData, + HANDLE_SBR_PREV_FRAME_DATA hPrevFrameData, const int downsampleFac, + const UINT flags, HANDLE_SBR_FRAME_DATA hFrameData) { + SBR_ERROR sbrError = SBRDEC_OK; + int i; + FIXP_DBL *pLowBandReal[128]; + FIXP_DBL *pLowBandImag[128]; + int useLP = flags & SBRDEC_LOW_POWER; + + int old_lsb = hSbrDec->qmfDomainInCh->fb.lsb; + int old_usb = hSbrDec->qmfDomainInCh->fb.usb; + int new_lsb = hHeaderData->freqBandData.lowSubband; + /* int new_usb = hHeaderData->freqBandData.highSubband; */ + int l, startBand, stopBand, startSlot, size; + + FIXP_DBL **OverlapBufferReal = hSbrDec->qmfDomainInCh->hQmfSlotsReal; + FIXP_DBL **OverlapBufferImag = hSbrDec->qmfDomainInCh->hQmfSlotsImag; + + /* in case the previous frame was not active in terms of SBR processing, the + full band from 0 to no_channels was rescaled and not overwritten. Thats why + the scaling factor lb_scale can be seen as assigned to all bands from 0 to + no_channels in the previous frame. The same states for the current frame if + the current frame is not active in terms of SBR processing + */ + int applySbrProc = (hHeaderData->syncState == SBR_ACTIVE || + (hHeaderData->frameErrorFlag == 0 && + hHeaderData->syncState == SBR_HEADER)); + int applySbrProc_old = hSbrDec->applySbrProc_old; + + if (!applySbrProc) { + new_lsb = (hSbrDec->qmfDomainInCh->fb).no_channels; + } + if (!applySbrProc_old) { + old_lsb = (hSbrDec->qmfDomainInCh->fb).no_channels; + old_usb = old_lsb; + } + + resetSbrEnvelopeCalc(&hSbrDec->SbrCalculateEnvelope); + + /* Change lsb and usb */ + /* Synthesis */ + FDK_ASSERT(hSbrDec->qmfDomainOutCh != NULL); + hSbrDec->qmfDomainOutCh->fb.lsb = + fixMin((INT)hSbrDec->qmfDomainOutCh->fb.no_channels, + (INT)hHeaderData->freqBandData.lowSubband); + hSbrDec->qmfDomainOutCh->fb.usb = + fixMin((INT)hSbrDec->qmfDomainOutCh->fb.no_channels, + (INT)hHeaderData->freqBandData.highSubband); + /* Analysis */ + FDK_ASSERT(hSbrDec->qmfDomainInCh != NULL); + hSbrDec->qmfDomainInCh->fb.lsb = hSbrDec->qmfDomainOutCh->fb.lsb; + hSbrDec->qmfDomainInCh->fb.usb = hSbrDec->qmfDomainOutCh->fb.usb; + + /* + The following initialization of spectral data in the overlap buffer + is required for dynamic x-over or a change of the start-freq for 2 reasons: + + 1. If the lowband gets _wider_, unadjusted data would remain + + 2. If the lowband becomes _smaller_, the highest bands of the old lowband + must be cleared because the whitening would be affected + */ + startBand = old_lsb; + stopBand = new_lsb; + startSlot = fMax(0, hHeaderData->timeStep * (hPrevFrameData->stopPos - + hHeaderData->numberTimeSlots)); + size = fMax(0, stopBand - startBand); + + /* in case of USAC we don't want to zero out the memory, as this can lead to + holes in the spectrum; fix shall only be applied for USAC not for MPEG-4 + SBR, in this case setting zero remains */ + if (!(flags & SBRDEC_SYNTAX_USAC)) { + /* keep already adjusted data in the x-over-area */ + if (!useLP) { + for (l = startSlot; l < hSbrDec->LppTrans.pSettings->overlap; l++) { + FDKmemclear(&OverlapBufferReal[l][startBand], size * sizeof(FIXP_DBL)); + FDKmemclear(&OverlapBufferImag[l][startBand], size * sizeof(FIXP_DBL)); + } + } else { + for (l = startSlot; l < hSbrDec->LppTrans.pSettings->overlap; l++) { + FDKmemclear(&OverlapBufferReal[l][startBand], size * sizeof(FIXP_DBL)); + } + } + + /* + reset LPC filter states + */ + startBand = fixMin(old_lsb, new_lsb); + stopBand = fixMax(old_lsb, new_lsb); + size = fixMax(0, stopBand - startBand); + + FDKmemclear(&hSbrDec->LppTrans.lpcFilterStatesRealLegSBR[0][startBand], + size * sizeof(FIXP_DBL)); + FDKmemclear(&hSbrDec->LppTrans.lpcFilterStatesRealLegSBR[1][startBand], + size * sizeof(FIXP_DBL)); + if (!useLP) { + FDKmemclear(&hSbrDec->LppTrans.lpcFilterStatesImagLegSBR[0][startBand], + size * sizeof(FIXP_DBL)); + FDKmemclear(&hSbrDec->LppTrans.lpcFilterStatesImagLegSBR[1][startBand], + size * sizeof(FIXP_DBL)); + } + } + + if (startSlot != 0) { + int source_exp, target_exp, delta_exp, target_lsb, target_usb, reserve; + FIXP_DBL maxVal; + + /* + Rescale already processed spectral data between old and new x-over + frequency. This must be done because of the separate scalefactors for + lowband and highband. + */ + + /* We have four relevant transitions to cover: + 1. old_usb is lower than new_lsb; old SBR area is completely below new SBR + area. + -> entire old area was highband and belongs to lowband now + and has to be rescaled. + 2. old_lsb is higher than new_usb; new SBR area is completely below old SBR + area. + -> old area between new_lsb and old_lsb was lowband and belongs to + highband now and has to be rescaled to match new highband scale. + 3. old_lsb is lower and old_usb is higher than new_lsb; old and new SBR + areas overlap. + -> old area between old_lsb and new_lsb was highband and belongs to + lowband now and has to be rescaled to match new lowband scale. + 4. new_lsb is lower and new_usb_is higher than old_lsb; old and new SBR + areas overlap. + -> old area between new_lsb and old_usb was lowband and belongs to + highband now and has to be rescaled to match new highband scale. + */ + + if (new_lsb > old_lsb) { + /* case 1 and 3 */ + source_exp = SCALE2EXP(hSbrDec->qmfDomainInCh->scaling.ov_hb_scale); + target_exp = SCALE2EXP(hSbrDec->qmfDomainInCh->scaling.ov_lb_scale); + + startBand = old_lsb; + + if (new_lsb >= old_usb) { + /* case 1 */ + stopBand = old_usb; + } else { + /* case 3 */ + stopBand = new_lsb; + } + + target_lsb = 0; + target_usb = old_lsb; + } else { + /* case 2 and 4 */ + source_exp = SCALE2EXP(hSbrDec->qmfDomainInCh->scaling.ov_lb_scale); + target_exp = SCALE2EXP(hSbrDec->qmfDomainInCh->scaling.ov_hb_scale); + + startBand = new_lsb; + stopBand = old_lsb; + + target_lsb = old_lsb; + target_usb = old_usb; + } + + maxVal = + maxSubbandSample(OverlapBufferReal, (useLP) ? NULL : OverlapBufferImag, + startBand, stopBand, 0, startSlot); + + reserve = ((LONG)maxVal != 0 ? CntLeadingZeros(maxVal) - 1 : 0); + reserve = fixMin( + reserve, + DFRACT_BITS - 1 - + EXP2SCALE( + source_exp)); /* what is this line for, why do we need it? */ + + /* process only if x-over-area is not dominant after rescale; + otherwise I'm not sure if all buffers are scaled correctly; + */ + if (target_exp - (source_exp - reserve) >= 0) { + rescaleSubbandSamples(OverlapBufferReal, + (useLP) ? NULL : OverlapBufferImag, startBand, + stopBand, 0, startSlot, reserve); + source_exp -= reserve; + } + + delta_exp = target_exp - source_exp; + + if (delta_exp < 0) { /* x-over-area is dominant */ + startBand = target_lsb; + stopBand = target_usb; + delta_exp = -delta_exp; + + if (new_lsb > old_lsb) { + /* The lowband has to be rescaled */ + hSbrDec->qmfDomainInCh->scaling.ov_lb_scale = EXP2SCALE(source_exp); + } else { + /* The highband has to be rescaled */ + hSbrDec->qmfDomainInCh->scaling.ov_hb_scale = EXP2SCALE(source_exp); + } + } + + FDK_ASSERT(startBand <= stopBand); + + if (!useLP) { + for (l = 0; l < startSlot; l++) { + scaleValues(OverlapBufferReal[l] + startBand, stopBand - startBand, + -delta_exp); + scaleValues(OverlapBufferImag[l] + startBand, stopBand - startBand, + -delta_exp); + } + } else + for (l = 0; l < startSlot; l++) { + scaleValues(OverlapBufferReal[l] + startBand, stopBand - startBand, + -delta_exp); + } + } /* startSlot != 0 */ + + /* + Initialize transposer and limiter + */ + sbrError = resetLppTransposer( + &hSbrDec->LppTrans, hHeaderData->freqBandData.lowSubband, + hHeaderData->freqBandData.v_k_master, hHeaderData->freqBandData.numMaster, + hHeaderData->freqBandData.freqBandTableNoise, + hHeaderData->freqBandData.nNfb, hHeaderData->freqBandData.highSubband, + hHeaderData->sbrProcSmplRate); + if (sbrError != SBRDEC_OK) return sbrError; + + hSbrDec->savedStates = 0; + + if ((flags & SBRDEC_USAC_HARMONICSBR) && applySbrProc) { + sbrError = QmfTransposerReInit(hSbrDec->hHBE, + hHeaderData->freqBandData.freqBandTable, + hHeaderData->freqBandData.nSfb); + if (sbrError != SBRDEC_OK) return sbrError; + + /* copy saved states from previous frame to legacy SBR lpc filterstate + * buffer */ + for (i = 0; i < LPC_ORDER + hSbrDec->LppTrans.pSettings->overlap; i++) { + FDKmemcpy( + hSbrDec->LppTrans.lpcFilterStatesRealLegSBR[i], + hSbrDec->codecQMFBufferReal[hSbrDec->hHBE->noCols - LPC_ORDER - + hSbrDec->LppTrans.pSettings->overlap + i], + hSbrDec->hHBE->noChannels * sizeof(FIXP_DBL)); + FDKmemcpy( + hSbrDec->LppTrans.lpcFilterStatesImagLegSBR[i], + hSbrDec->codecQMFBufferImag[hSbrDec->hHBE->noCols - LPC_ORDER - + hSbrDec->LppTrans.pSettings->overlap + i], + hSbrDec->hHBE->noChannels * sizeof(FIXP_DBL)); + } + hSbrDec->savedStates = 1; + + { + /* map QMF buffer to pointer array (Overlap + Frame)*/ + for (i = 0; i < hSbrDec->LppTrans.pSettings->overlap + LPC_ORDER; i++) { + pLowBandReal[i] = hSbrDec->LppTrans.lpcFilterStatesRealHBE[i]; + pLowBandImag[i] = hSbrDec->LppTrans.lpcFilterStatesImagHBE[i]; + } + + /* map QMF buffer to pointer array (Overlap + Frame)*/ + for (i = 0; i < hSbrDec->hHBE->noCols; i++) { + pLowBandReal[i + hSbrDec->LppTrans.pSettings->overlap + LPC_ORDER] = + hSbrDec->codecQMFBufferReal[i]; + pLowBandImag[i + hSbrDec->LppTrans.pSettings->overlap + LPC_ORDER] = + hSbrDec->codecQMFBufferImag[i]; + } + + if (flags & SBRDEC_QUAD_RATE) { + if (hFrameData->sbrPatchingMode == 0) { + int *xOverQmf = GetxOverBandQmfTransposer(hSbrDec->hHBE); + + /* in case of harmonic SBR and no HBE_LP map additional buffer for + one more frame to pointer arry */ + for (i = 0; i < hSbrDec->hHBE->noCols / 2; i++) { + pLowBandReal[i + hSbrDec->hHBE->noCols + + hSbrDec->LppTrans.pSettings->overlap + LPC_ORDER] = + hSbrDec->hQmfHBESlotsReal[i]; + pLowBandImag[i + hSbrDec->hHBE->noCols + + hSbrDec->LppTrans.pSettings->overlap + LPC_ORDER] = + hSbrDec->hQmfHBESlotsImag[i]; + } + + QmfTransposerApply( + hSbrDec->hHBE, + pLowBandReal + hSbrDec->LppTrans.pSettings->overlap + + hSbrDec->hHBE->noCols / 2 + LPC_ORDER, + pLowBandImag + hSbrDec->LppTrans.pSettings->overlap + + hSbrDec->hHBE->noCols / 2 + LPC_ORDER, + hSbrDec->hHBE->noCols, pLowBandReal, pLowBandImag, + hSbrDec->LppTrans.lpcFilterStatesRealHBE, + hSbrDec->LppTrans.lpcFilterStatesImagHBE, + hPrevFrameData->prevSbrPitchInBins, hSbrDec->scale_lb, + hSbrDec->scale_hbe, &hSbrDec->qmfDomainInCh->scaling.hb_scale, + hHeaderData->timeStep, hFrameData->frameInfo.borders[0], + hSbrDec->LppTrans.pSettings->overlap, KEEP_STATES_SYNCED_OUTDIFF); + + copyHarmonicSpectrum( + xOverQmf, pLowBandReal, pLowBandImag, hSbrDec->hHBE->noCols, + hSbrDec->LppTrans.pSettings->overlap, KEEP_STATES_SYNCED_OUTDIFF); + } + } else { + /* in case of harmonic SBR and no HBE_LP map additional buffer for + one more frame to pointer arry */ + for (i = 0; i < hSbrDec->hHBE->noCols; i++) { + pLowBandReal[i + hSbrDec->hHBE->noCols + + hSbrDec->LppTrans.pSettings->overlap + LPC_ORDER] = + hSbrDec->hQmfHBESlotsReal[i]; + pLowBandImag[i + hSbrDec->hHBE->noCols + + hSbrDec->LppTrans.pSettings->overlap + LPC_ORDER] = + hSbrDec->hQmfHBESlotsImag[i]; + } + + if (hFrameData->sbrPatchingMode == 0) { + QmfTransposerApply( + hSbrDec->hHBE, + pLowBandReal + hSbrDec->LppTrans.pSettings->overlap + LPC_ORDER, + pLowBandImag + hSbrDec->LppTrans.pSettings->overlap + LPC_ORDER, + hSbrDec->hHBE->noCols, pLowBandReal, pLowBandImag, + hSbrDec->LppTrans.lpcFilterStatesRealHBE, + hSbrDec->LppTrans.lpcFilterStatesImagHBE, + 0 /* not required for keeping states updated in this frame*/, + hSbrDec->scale_lb, hSbrDec->scale_lb, + &hSbrDec->qmfDomainInCh->scaling.hb_scale, hHeaderData->timeStep, + hFrameData->frameInfo.borders[0], + hSbrDec->LppTrans.pSettings->overlap, KEEP_STATES_SYNCED_NOOUT); + } + + QmfTransposerApply( + hSbrDec->hHBE, + pLowBandReal + hSbrDec->LppTrans.pSettings->overlap + + hSbrDec->hHBE->noCols + LPC_ORDER, + pLowBandImag + hSbrDec->LppTrans.pSettings->overlap + + hSbrDec->hHBE->noCols + LPC_ORDER, + hSbrDec->hHBE->noCols, pLowBandReal, pLowBandImag, + hSbrDec->LppTrans.lpcFilterStatesRealHBE, + hSbrDec->LppTrans.lpcFilterStatesImagHBE, + hPrevFrameData->prevSbrPitchInBins, hSbrDec->scale_lb, + hSbrDec->scale_hbe, &hSbrDec->qmfDomainInCh->scaling.hb_scale, + hHeaderData->timeStep, hFrameData->frameInfo.borders[0], + hSbrDec->LppTrans.pSettings->overlap, KEEP_STATES_SYNCED_OUTDIFF); + } + + if (hFrameData->sbrPatchingMode == 0) { + for (i = startSlot; i < hSbrDec->LppTrans.pSettings->overlap; i++) { + /* + Store the unmodified qmf Slots values for upper part of spectrum + (required for LPC filtering) required if next frame is a HBE frame + */ + FDKmemcpy(hSbrDec->qmfDomainInCh->hQmfSlotsReal[i], + hSbrDec->LppTrans.lpcFilterStatesRealHBE[i + LPC_ORDER], + (64) * sizeof(FIXP_DBL)); + FDKmemcpy(hSbrDec->qmfDomainInCh->hQmfSlotsImag[i], + hSbrDec->LppTrans.lpcFilterStatesImagHBE[i + LPC_ORDER], + (64) * sizeof(FIXP_DBL)); + } + + for (i = startSlot; i < hSbrDec->LppTrans.pSettings->overlap; i++) { + /* + Store the unmodified qmf Slots values for upper part of spectrum + (required for LPC filtering) required if next frame is a HBE frame + */ + FDKmemcpy( + hSbrDec->qmfDomainInCh->hQmfSlotsReal[i], + hSbrDec->codecQMFBufferReal[hSbrDec->hHBE->noCols - + hSbrDec->LppTrans.pSettings->overlap + + i], + new_lsb * sizeof(FIXP_DBL)); + FDKmemcpy( + hSbrDec->qmfDomainInCh->hQmfSlotsImag[i], + hSbrDec->codecQMFBufferImag[hSbrDec->hHBE->noCols - + hSbrDec->LppTrans.pSettings->overlap + + i], + new_lsb * sizeof(FIXP_DBL)); + } + } + } + } + + { + int adapt_lb = 0, diff = 0, + new_scale = hSbrDec->qmfDomainInCh->scaling.ov_lb_scale; + + if ((hSbrDec->qmfDomainInCh->scaling.ov_lb_scale != + hSbrDec->qmfDomainInCh->scaling.lb_scale) && + startSlot != 0) { + /* we need to adapt spectrum to have equal scale factor, always larger + * than zero */ + diff = SCALE2EXP(hSbrDec->qmfDomainInCh->scaling.ov_lb_scale) - + SCALE2EXP(hSbrDec->qmfDomainInCh->scaling.lb_scale); + + if (diff > 0) { + adapt_lb = 1; + diff = -diff; + new_scale = hSbrDec->qmfDomainInCh->scaling.ov_lb_scale; + } + + stopBand = new_lsb; + } + + if (hFrameData->sbrPatchingMode == 1) { + /* scale states from LegSBR filterstates buffer */ + for (i = 0; i < hSbrDec->LppTrans.pSettings->overlap + LPC_ORDER; i++) { + scaleValues(hSbrDec->LppTrans.lpcFilterStatesRealLegSBR[i], new_lsb, + diff); + if (!useLP) { + scaleValues(hSbrDec->LppTrans.lpcFilterStatesImagLegSBR[i], new_lsb, + diff); + } + } + + if (flags & SBRDEC_SYNTAX_USAC) { + /* get missing states between old and new x_over from LegSBR + * filterstates buffer */ + /* in case of legacy SBR we leave these values zeroed out */ + for (i = startSlot; i < hSbrDec->LppTrans.pSettings->overlap; i++) { + FDKmemcpy(&OverlapBufferReal[i][old_lsb], + &hSbrDec->LppTrans + .lpcFilterStatesRealLegSBR[LPC_ORDER + i][old_lsb], + fMax(new_lsb - old_lsb, 0) * sizeof(FIXP_DBL)); + if (!useLP) { + FDKmemcpy(&OverlapBufferImag[i][old_lsb], + &hSbrDec->LppTrans + .lpcFilterStatesImagLegSBR[LPC_ORDER + i][old_lsb], + fMax(new_lsb - old_lsb, 0) * sizeof(FIXP_DBL)); + } + } + } + + if (new_lsb > old_lsb) { + stopBand = old_lsb; + } + } + if ((adapt_lb == 1) && (stopBand > startBand)) { + for (l = startSlot; l < hSbrDec->LppTrans.pSettings->overlap; l++) { + scaleValues(OverlapBufferReal[l] + startBand, stopBand - startBand, + diff); + if (!useLP) { + scaleValues(OverlapBufferImag[l] + startBand, stopBand - startBand, + diff); + } + } + } + hSbrDec->qmfDomainInCh->scaling.ov_lb_scale = new_scale; + } + + sbrError = ResetLimiterBands(hHeaderData->freqBandData.limiterBandTable, + &hHeaderData->freqBandData.noLimiterBands, + hHeaderData->freqBandData.freqBandTable[0], + hHeaderData->freqBandData.nSfb[0], + hSbrDec->LppTrans.pSettings->patchParam, + hSbrDec->LppTrans.pSettings->noOfPatches, + hHeaderData->bs_data.limiterBands, + hFrameData->sbrPatchingMode, + GetxOverBandQmfTransposer(hSbrDec->hHBE), + Get41SbrQmfTransposer(hSbrDec->hHBE)); + + hSbrDec->SbrCalculateEnvelope.sbrPatchingMode = hFrameData->sbrPatchingMode; + + return sbrError; +} |