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diff --git a/libSBRdec/src/sbr_dec.cpp b/libSBRdec/src/sbr_dec.cpp deleted file mode 100644 index 1282338..0000000 --- a/libSBRdec/src/sbr_dec.cpp +++ /dev/null @@ -1,1050 +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 ------------------------------------------------------------------------------------------------------------ */ - -/*! - \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 "genericStds.h" - -#include "sbrdec_drc.h" - - - -static void assignLcTimeSlots( HANDLE_SBR_DEC hSbrDec, /*!< handle to Decoder channel */ - FIXP_DBL **QmfBufferReal, - int noCols ) -{ - int slot, i; - FIXP_DBL *ptr; - - /* Number of QMF timeslots in the overlap buffer: */ - ptr = hSbrDec->pSbrOverlapBuffer; - for(slot=0; slot<hSbrDec->LppTrans.pSettings->overlap; slot++) { - QmfBufferReal[slot] = ptr; ptr += (64); - } - - /* Assign timeslots to Workbuffer1 */ - ptr = hSbrDec->WorkBuffer1; - for(i=0; i<noCols; i++) { - QmfBufferReal[slot] = ptr; ptr += (64); - slot++; - } -} - - -static void assignHqTimeSlots( HANDLE_SBR_DEC hSbrDec, /*!< handle to Decoder channel */ - FIXP_DBL **QmfBufferReal, - FIXP_DBL **QmfBufferImag, - int noCols ) -{ - FIXP_DBL *ptr; - int slot; - - /* Number of QMF timeslots in one half of a frame (size of Workbuffer1 or 2): */ - int halflen = (noCols >> 1) + hSbrDec->LppTrans.pSettings->overlap; - int totCols = noCols + hSbrDec->LppTrans.pSettings->overlap; - - /* Number of QMF timeslots in the overlap buffer: */ - ptr = hSbrDec->pSbrOverlapBuffer; - for(slot=0; slot<hSbrDec->LppTrans.pSettings->overlap; slot++) { - QmfBufferReal[slot] = ptr; ptr += (64); - QmfBufferImag[slot] = ptr; ptr += (64); - } - - /* Assign first half of timeslots to Workbuffer1 */ - ptr = hSbrDec->WorkBuffer1; - for(; slot<halflen; slot++) { - QmfBufferReal[slot] = ptr; ptr += (64); - QmfBufferImag[slot] = ptr; ptr += (64); - } - - /* Assign second half of timeslots to Workbuffer2 */ - ptr = hSbrDec->WorkBuffer2; - for(; slot<totCols; slot++) { - QmfBufferReal[slot] = ptr; ptr += (64); - QmfBufferImag[slot] = ptr; ptr += (64); - } -} - - -static void assignTimeSlots( HANDLE_SBR_DEC hSbrDec, /*!< handle to Decoder channel */ - int noCols, - int useLP ) -{ - /* assign qmf time slots */ - hSbrDec->useLP = useLP; - if (useLP) { - hSbrDec->SynthesisQMF.flags |= QMF_FLAG_LP; - hSbrDec->AnalysiscQMF.flags |= QMF_FLAG_LP; - } else { - hSbrDec->SynthesisQMF.flags &= ~QMF_FLAG_LP; - hSbrDec->AnalysiscQMF.flags &= ~QMF_FLAG_LP; - } - if (!useLP) - assignHqTimeSlots( hSbrDec, hSbrDec->QmfBufferReal, hSbrDec->QmfBufferImag, noCols ); - else - { - assignLcTimeSlots( hSbrDec, hSbrDec->QmfBufferReal, noCols ); - } -} - -static void changeQmfType( HANDLE_SBR_DEC hSbrDec, /*!< handle to Decoder channel */ - int useLdTimeAlign ) -{ - UINT synQmfFlags = hSbrDec->SynthesisQMF.flags; - UINT anaQmfFlags = hSbrDec->AnalysiscQMF.flags; - int resetSynQmf = 0; - int resetAnaQmf = 0; - - /* assign qmf type */ - if (useLdTimeAlign) { - if (synQmfFlags & QMF_FLAG_CLDFB) { - /* change the type to MPSLD */ - synQmfFlags &= ~QMF_FLAG_CLDFB; - synQmfFlags |= QMF_FLAG_MPSLDFB; - resetSynQmf = 1; - } - if (anaQmfFlags & QMF_FLAG_CLDFB) { - /* change the type to MPSLD */ - anaQmfFlags &= ~QMF_FLAG_CLDFB; - anaQmfFlags |= QMF_FLAG_MPSLDFB; - resetAnaQmf = 1; - } - } else { - if (synQmfFlags & QMF_FLAG_MPSLDFB) { - /* change the type to CLDFB */ - synQmfFlags &= ~QMF_FLAG_MPSLDFB; - synQmfFlags |= QMF_FLAG_CLDFB; - resetSynQmf = 1; - } - if (anaQmfFlags & QMF_FLAG_MPSLDFB) { - /* change the type to CLDFB */ - anaQmfFlags &= ~QMF_FLAG_MPSLDFB; - anaQmfFlags |= QMF_FLAG_CLDFB; - resetAnaQmf = 1; - } - } - - if (resetAnaQmf) { - int qmfErr = qmfInitAnalysisFilterBank ( - &hSbrDec->AnalysiscQMF, - hSbrDec->anaQmfStates, - hSbrDec->AnalysiscQMF.no_col, - hSbrDec->AnalysiscQMF.lsb, - hSbrDec->AnalysiscQMF.usb, - hSbrDec->AnalysiscQMF.no_channels, - anaQmfFlags | QMF_FLAG_KEEP_STATES - ); - if (qmfErr != 0) { - FDK_ASSERT(0); - } - } - - if (resetSynQmf) { - int qmfErr = qmfInitSynthesisFilterBank ( - &hSbrDec->SynthesisQMF, - hSbrDec->pSynQmfStates, - hSbrDec->SynthesisQMF.no_col, - hSbrDec->SynthesisQMF.lsb, - hSbrDec->SynthesisQMF.usb, - hSbrDec->SynthesisQMF.no_channels, - synQmfFlags | QMF_FLAG_KEEP_STATES - ); - - if (qmfErr != 0) { - FDK_ASSERT(0); - } - } -} - - -/*! - \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. Du to in-place - processing, #timeIn and #timeOut point to identical locations. - - The spectral data is organized in so-called slots, each slot - containing 64 bands of complex data. The number of slots per frame is - dependend 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 strideIn, /*!< Time data traversal strideIn */ - 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 - ) -{ - int i, slot, reserve; - int saveLbScale; - int ov_len; - int lastSlotOffs; - FIXP_DBL maxVal; - - /* 1+1/3 frames of spectral data: */ - FIXP_DBL **QmfBufferReal = hSbrDec->QmfBufferReal; - FIXP_DBL **QmfBufferImag = hSbrDec->QmfBufferImag; - - /* Number of QMF timeslots in the overlap buffer: */ - ov_len = hSbrDec->LppTrans.pSettings->overlap; - - /* Number of QMF slots per frame */ - int noCols = hHeaderData->numberTimeSlots * hHeaderData->timeStep; - - /* assign qmf time slots */ - if ( ((flags & SBRDEC_LOW_POWER ) ? 1 : 0) != ((hSbrDec->SynthesisQMF.flags & QMF_FLAG_LP) ? 1 : 0) ) { - assignTimeSlots( hSbrDec, hHeaderData->numberTimeSlots * hHeaderData->timeStep, flags & SBRDEC_LOW_POWER); - } - - if (flags & SBRDEC_ELD_GRID) { - /* Choose the right low delay filter bank */ - changeQmfType( hSbrDec, (flags & SBRDEC_LD_MPS_QMF) ? 1 : 0 ); - } - - /* - low band codec signal subband filtering - */ - - { - C_AALLOC_SCRATCH_START(qmfTemp, FIXP_DBL, 2*(64)); - - qmfAnalysisFiltering( &hSbrDec->AnalysiscQMF, - QmfBufferReal + ov_len, - QmfBufferImag + ov_len, - &hSbrDec->sbrScaleFactor, - timeIn, - strideIn, - qmfTemp - ); - - C_AALLOC_SCRATCH_END(qmfTemp, FIXP_DBL, 2*(64)); - } - - /* - Clear upper half of spectrum - */ - { - int nAnalysisBands = hHeaderData->numberOfAnalysisBands; - - if (! (flags & SBRDEC_LOW_POWER)) { - for (slot = ov_len; slot < noCols+ov_len; slot++) { - FDKmemclear(&QmfBufferReal[slot][nAnalysisBands],((64)-nAnalysisBands)*sizeof(FIXP_DBL)); - FDKmemclear(&QmfBufferImag[slot][nAnalysisBands],((64)-nAnalysisBands)*sizeof(FIXP_DBL)); - } - } else - for (slot = ov_len; slot < noCols+ov_len; slot++) { - FDKmemclear(&QmfBufferReal[slot][nAnalysisBands],((64)-nAnalysisBands)*sizeof(FIXP_DBL)); - } - } - - - - /* - Shift spectral data left to gain accuracy in transposer and adjustor - */ - maxVal = maxSubbandSample( QmfBufferReal, - (flags & SBRDEC_LOW_POWER) ? NULL : QmfBufferImag, - 0, - hSbrDec->AnalysiscQMF.lsb, - ov_len, - noCols+ov_len ); - - reserve = fixMax(0,CntLeadingZeros(maxVal)-1) ; - reserve = fixMin(reserve,DFRACT_BITS-1-hSbrDec->sbrScaleFactor.lb_scale); - - /* If all data is zero, lb_scale could become too large */ - rescaleSubbandSamples( QmfBufferReal, - (flags & SBRDEC_LOW_POWER) ? NULL : QmfBufferImag, - 0, - hSbrDec->AnalysiscQMF.lsb, - ov_len, - noCols+ov_len, - reserve); - - hSbrDec->sbrScaleFactor.lb_scale += reserve; - - /* - save low band scale, wavecoding or parametric stereo may modify it - */ - saveLbScale = hSbrDec->sbrScaleFactor.lb_scale; - - - if (applyProcessing) - { - UCHAR * borders = hFrameData->frameInfo.borders; - lastSlotOffs = borders[hFrameData->frameInfo.nEnvelopes] - hHeaderData->numberTimeSlots; - - FIXP_DBL degreeAlias[(64)]; - - /* 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 - */ - - lppTransposer ( &hSbrDec->LppTrans, - &hSbrDec->sbrScaleFactor, - QmfBufferReal, - degreeAlias, // only used if useLP = 1 - QmfBufferImag, - flags & SBRDEC_LOW_POWER, - hHeaderData->timeStep, - borders[0], - lastSlotOffs, - hHeaderData->freqBandData.nInvfBands, - hFrameData->sbr_invf_mode, - hPrevFrameData->sbr_invf_mode ); - - - - - - /* - Adjust envelope of current frame. - */ - - calculateSbrEnvelope (&hSbrDec->sbrScaleFactor, - &hSbrDec->SbrCalculateEnvelope, - hHeaderData, - hFrameData, - QmfBufferReal, - QmfBufferImag, - flags & SBRDEC_LOW_POWER, - - degreeAlias, - flags, - (hHeaderData->frameErrorFlag || hPrevFrameData->frameErrorFlag)); - - - /* - 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; - } - else { - /* Reset hb_scale if no highband is present, because hb_scale is considered in the QMF-synthesis */ - hSbrDec->sbrScaleFactor.hb_scale = saveLbScale; - } - - - for (i=0; i<LPC_ORDER; i++){ - /* - Store the unmodified qmf Slots values (required for LPC filtering) - */ - if (! (flags & SBRDEC_LOW_POWER)) { - FDKmemcpy(hSbrDec->LppTrans.lpcFilterStatesReal[i], QmfBufferReal[noCols-LPC_ORDER+i], hSbrDec->AnalysiscQMF.lsb*sizeof(FIXP_DBL)); - FDKmemcpy(hSbrDec->LppTrans.lpcFilterStatesImag[i], QmfBufferImag[noCols-LPC_ORDER+i], hSbrDec->AnalysiscQMF.lsb*sizeof(FIXP_DBL)); - } else - FDKmemcpy(hSbrDec->LppTrans.lpcFilterStatesReal[i], QmfBufferReal[noCols-LPC_ORDER+i], hSbrDec->AnalysiscQMF.lsb*sizeof(FIXP_DBL)); - } - - /* - Synthesis subband filtering. - */ - - if ( ! (flags & SBRDEC_PS_DECODED) ) { - - { - int outScalefactor = 0; - - if (h_ps_d != NULL) { - h_ps_d->procFrameBased = 1; /* we here do frame based processing */ - } - - - sbrDecoder_drcApply(&hSbrDec->sbrDrcChannel, - QmfBufferReal, - (flags & SBRDEC_LOW_POWER) ? NULL : QmfBufferImag, - hSbrDec->SynthesisQMF.no_col, - &outScalefactor - ); - - - - qmfChangeOutScalefactor(&hSbrDec->SynthesisQMF, outScalefactor ); - - { - C_AALLOC_SCRATCH_START(qmfTemp, FIXP_DBL, 2*(64)); - - qmfSynthesisFiltering( &hSbrDec->SynthesisQMF, - QmfBufferReal, - (flags & SBRDEC_LOW_POWER) ? NULL : QmfBufferImag, - &hSbrDec->sbrScaleFactor, - hSbrDec->LppTrans.pSettings->overlap, - timeOut, - strideOut, - qmfTemp); - - C_AALLOC_SCRATCH_END(qmfTemp, FIXP_DBL, 2*(64)); - } - - } - - } else { /* (flags & SBRDEC_PS_DECODED) */ - INT i, sdiff, outScalefactor, scaleFactorLowBand, scaleFactorHighBand; - SCHAR scaleFactorLowBand_ov, scaleFactorLowBand_no_ov; - - HANDLE_QMF_FILTER_BANK synQmf = &hSbrDec->SynthesisQMF; - HANDLE_QMF_FILTER_BANK synQmfRight = &hSbrDecRight->SynthesisQMF; - - /* adapt scaling */ - sdiff = hSbrDec->sbrScaleFactor.lb_scale - reserve; /* Scaling difference */ - scaleFactorHighBand = sdiff - hSbrDec->sbrScaleFactor.hb_scale; /* Scale of current high band */ - scaleFactorLowBand_ov = sdiff - hSbrDec->sbrScaleFactor.ov_lb_scale; /* Scale of low band overlapping QMF data */ - scaleFactorLowBand_no_ov = sdiff - hSbrDec->sbrScaleFactor.lb_scale; /* Scale of low band current QMF data */ - outScalefactor = 0; /* Initial output scale */ - - 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 */ - FDKmemcpy(synQmfRight->FilterStates, synQmf->FilterStates, ((640)-(64))*sizeof(FIXP_QSS)); - } - - /* scale ALL qmf vales ( real and imag ) of mono / left channel to the - same scale factor ( ov_lb_sf, lb_sf and hq_sf ) */ - scalFilterBankValues( h_ps_d, /* parametric stereo decoder handle */ - QmfBufferReal, /* qmf filterbank values */ - QmfBufferImag, /* qmf filterbank values */ - synQmf->lsb, /* sbr start subband */ - hSbrDec->sbrScaleFactor.ov_lb_scale, - hSbrDec->sbrScaleFactor.lb_scale, - &scaleFactorLowBand_ov, /* adapt scaling values */ - &scaleFactorLowBand_no_ov, /* adapt scaling values */ - hSbrDec->sbrScaleFactor.hb_scale, /* current frame ( highband ) */ - &scaleFactorHighBand, - synQmf->no_col); - - /* 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; - - outScalefactor += (SCAL_HEADROOM+1); /* psDiffScale! */ - - { - C_AALLOC_SCRATCH_START(pWorkBuffer, FIXP_DBL, 2*(64)); - - 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; - outScalefactorR = outScalefactorL = outScalefactor; - - /* qmf timeslot of right channel */ - FIXP_DBL* rQmfReal = pWorkBuffer; - FIXP_DBL* rQmfImag = pWorkBuffer + 64; - - - { - 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 */ - (QmfBufferReal + i), /* one timeslot of left/mono channel */ - (QmfBufferImag + i), /* one timeslot of left/mono channel */ - rQmfReal, /* one timeslot or right channel */ - rQmfImag); /* one timeslot or right channel */ - } - - - scaleFactorLowBand = (i<(6)) ? scaleFactorLowBand_ov : scaleFactorLowBand_no_ov; - - - sbrDecoder_drcApplySlot ( /* right channel */ - &hSbrDecRight->sbrDrcChannel, - rQmfReal, - rQmfImag, - i, - synQmfRight->no_col, - maxShift - ); - - outScalefactorR += maxShift; - - sbrDecoder_drcApplySlot ( /* left channel */ - &hSbrDec->sbrDrcChannel, - *(QmfBufferReal + i), - *(QmfBufferImag + i), - i, - synQmf->no_col, - maxShift - ); - - outScalefactorL += maxShift; - - - /* scale filter states for left and right channel */ - qmfChangeOutScalefactor( synQmf, outScalefactorL ); - qmfChangeOutScalefactor( synQmfRight, outScalefactorR ); - - { - - qmfSynthesisFilteringSlot( synQmfRight, - rQmfReal, /* QMF real buffer */ - rQmfImag, /* QMF imag buffer */ - scaleFactorLowBand, - scaleFactorHighBand, - timeOutRight+(i*synQmf->no_channels*strideOut), - strideOut, - pWorkBuffer); - - qmfSynthesisFilteringSlot( synQmf, - *(QmfBufferReal + i), /* QMF real buffer */ - *(QmfBufferImag + i), /* QMF imag buffer */ - scaleFactorLowBand, - scaleFactorHighBand, - timeOut+(i*synQmf->no_channels*strideOut), - strideOut, - pWorkBuffer); - - } - } /* no_col loop i */ - - /* scale back (6) timeslots look ahead for hybrid filterbank to original value */ - rescalFilterBankValues( h_ps_d, - QmfBufferReal, - QmfBufferImag, - synQmf->lsb, - synQmf->no_col ); - - C_AALLOC_SCRATCH_END(pWorkBuffer, FIXP_DBL, 2*(64)); - } - } - - 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 (hSbrDec->LppTrans.pSettings->overlap > 0) - { - if (! (flags & SBRDEC_LOW_POWER)) { - for ( i=0; i<hSbrDec->LppTrans.pSettings->overlap; i++ ) { - FDKmemcpy(QmfBufferReal[i], QmfBufferReal[i+noCols], (64)*sizeof(FIXP_DBL)); - FDKmemcpy(QmfBufferImag[i], QmfBufferImag[i+noCols], (64)*sizeof(FIXP_DBL)); - } - } else - for ( i=0; i<hSbrDec->LppTrans.pSettings->overlap; i++ ) { - FDKmemcpy(QmfBufferReal[i], QmfBufferReal[i+noCols], (64)*sizeof(FIXP_DBL)); - } - } - - hSbrDec->sbrScaleFactor.ov_lb_scale = saveLbScale; - - /* Save current frame status */ - hPrevFrameData->frameErrorFlag = hHeaderData->frameErrorFlag; - -} // 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. */ - -{ - 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); - - /* Initialize scale factors */ - hs->sbrScaleFactor.ov_lb_scale = 0; - hs->sbrScaleFactor.ov_hb_scale = 0; - hs->sbrScaleFactor.hb_scale = 0; - - - /* - create envelope calculator - */ - err = createSbrEnvelopeCalc (&hs->SbrCalculateEnvelope, - hHeaderData, - chan, - flags); - if (err != SBRDEC_OK) { - return err; - } - - /* - create QMF filter banks - */ - { - int qmfErr; - /* Adapted QMF analysis post-twiddles for down-sampled HQ SBR */ - const UINT downSampledFlag = (downsampleFac==2) ? QMF_FLAG_DOWNSAMPLED : 0; - - qmfErr = qmfInitAnalysisFilterBank ( - &hs->AnalysiscQMF, - hs->anaQmfStates, - noCols, - hHeaderData->freqBandData.lowSubband, - hHeaderData->freqBandData.highSubband, - hHeaderData->numberOfAnalysisBands, - (qmfFlags & (~QMF_FLAG_KEEP_STATES)) | downSampledFlag - ); - if (qmfErr != 0) { - return SBRDEC_UNSUPPORTED_CONFIG; - } - } - if (hs->pSynQmfStates == NULL) { - hs->pSynQmfStates = GetRam_sbr_QmfStatesSynthesis(chan); - if (hs->pSynQmfStates == NULL) - return SBRDEC_MEM_ALLOC_FAILED; - } - - { - int qmfErr; - - qmfErr = qmfInitSynthesisFilterBank ( - &hs->SynthesisQMF, - hs->pSynQmfStates, - noCols, - hHeaderData->freqBandData.lowSubband, - hHeaderData->freqBandData.highSubband, - (64) / downsampleFac, - qmfFlags & (~QMF_FLAG_KEEP_STATES) - ); - - if (qmfErr != 0) { - return SBRDEC_UNSUPPORTED_CONFIG; - } - } - initSbrPrevFrameData (&hSbrChannel->prevFrameData, timeSlots); - - /* - create transposer - */ - err = createLppTransposer (&hs->LppTrans, - pSettings, - hHeaderData->freqBandData.lowSubband, - hHeaderData->freqBandData.v_k_master, - hHeaderData->freqBandData.numMaster, - hs->SynthesisQMF.usb, - timeSlots, - hs->AnalysiscQMF.no_col, - hHeaderData->freqBandData.freqBandTableNoise, - hHeaderData->freqBandData.nNfb, - hHeaderData->sbrProcSmplRate, - chan, - overlap ); - if (err != SBRDEC_OK) { - return err; - } - - /* The CLDFB does not have overlap */ - if ((qmfFlags & QMF_FLAG_CLDFB) == 0) { - if (hs->pSbrOverlapBuffer == NULL) { - hs->pSbrOverlapBuffer = GetRam_sbr_OverlapBuffer(chan); - if (hs->pSbrOverlapBuffer == NULL) { - return SBRDEC_MEM_ALLOC_FAILED; - } - } else { - /* Clear overlap buffer */ - FDKmemclear( hs->pSbrOverlapBuffer, - sizeof(FIXP_DBL) * 2 * (6) * (64) - ); - } - } - - /* assign qmf time slots */ - assignTimeSlots( &hSbrChannel->SbrDec, hHeaderData->numberTimeSlots * hHeaderData->timeStep, qmfFlags & QMF_FLAG_LP); - - 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); - - /* delete QMF filter states */ - if (hs->pSynQmfStates != NULL) { - FreeRam_sbr_QmfStatesSynthesis(&hs->pSynQmfStates); - } - - - if (hs->pSbrOverlapBuffer != NULL) { - FreeRam_sbr_OverlapBuffer(&hs->pSbrOverlapBuffer); - } - - 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 useLP, - const int downsampleFac - ) -{ - SBR_ERROR sbrError = SBRDEC_OK; - - int old_lsb = hSbrDec->SynthesisQMF.lsb; - int new_lsb = hHeaderData->freqBandData.lowSubband; - int l, startBand, stopBand, startSlot, size; - - int source_scale, target_scale, delta_scale, target_lsb, target_usb, reserve; - FIXP_DBL maxVal; - - /* overlapBuffer point to first (6) slots */ - FIXP_DBL **OverlapBufferReal = hSbrDec->QmfBufferReal; - FIXP_DBL **OverlapBufferImag = hSbrDec->QmfBufferImag; - - /* assign qmf time slots */ - assignTimeSlots( hSbrDec, hHeaderData->numberTimeSlots * hHeaderData->timeStep, useLP); - - - - resetSbrEnvelopeCalc (&hSbrDec->SbrCalculateEnvelope); - - hSbrDec->SynthesisQMF.lsb = hHeaderData->freqBandData.lowSubband; - hSbrDec->SynthesisQMF.usb = fixMin((INT)hSbrDec->SynthesisQMF.no_channels, (INT)hHeaderData->freqBandData.highSubband); - - hSbrDec->AnalysiscQMF.lsb = hSbrDec->SynthesisQMF.lsb; - hSbrDec->AnalysiscQMF.usb = hSbrDec->SynthesisQMF.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 = hHeaderData->timeStep * (hPrevFrameData->stopPos - hHeaderData->numberTimeSlots); - size = fixMax(0,stopBand-startBand); - - /* 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.lpcFilterStatesReal[0][startBand], size*sizeof(FIXP_DBL)); - FDKmemclear(&hSbrDec->LppTrans.lpcFilterStatesReal[1][startBand], size*sizeof(FIXP_DBL)); - if (!useLP) { - FDKmemclear(&hSbrDec->LppTrans.lpcFilterStatesImag[0][startBand], size*sizeof(FIXP_DBL)); - FDKmemclear(&hSbrDec->LppTrans.lpcFilterStatesImag[1][startBand], size*sizeof(FIXP_DBL)); - } - - - /* - 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. - */ - startBand = fixMin(old_lsb,new_lsb); - stopBand = fixMax(old_lsb,new_lsb); - - if (new_lsb > old_lsb) { - /* The x-over-area was part of the highband before and will now belong to the lowband */ - source_scale = hSbrDec->sbrScaleFactor.ov_hb_scale; - target_scale = hSbrDec->sbrScaleFactor.ov_lb_scale; - target_lsb = 0; - target_usb = old_lsb; - } - else { - /* The x-over-area was part of the lowband before and will now belong to the highband */ - source_scale = hSbrDec->sbrScaleFactor.ov_lb_scale; - target_scale = hSbrDec->sbrScaleFactor.ov_hb_scale; - /* jdr: The values old_lsb and old_usb might be wrong because the previous frame might have been "upsamling". */ - target_lsb = hSbrDec->SynthesisQMF.lsb; - target_usb = hSbrDec->SynthesisQMF.usb; - } - - /* Shift left all samples of the x-over-area as much as possible - An unnecessary coarse scale could cause ov_lb_scale or ov_hb_scale to be - adapted and the accuracy in the next frame would seriously suffer! */ - - maxVal = maxSubbandSample( OverlapBufferReal, - (useLP) ? NULL : OverlapBufferImag, - startBand, - stopBand, - 0, - startSlot); - - reserve = CntLeadingZeros(maxVal)-1; - reserve = fixMin(reserve,DFRACT_BITS-1-source_scale); - - rescaleSubbandSamples( OverlapBufferReal, - (useLP) ? NULL : OverlapBufferImag, - startBand, - stopBand, - 0, - startSlot, - reserve); - source_scale += reserve; - - delta_scale = target_scale - source_scale; - - if (delta_scale > 0) { /* x-over-area is dominant */ - delta_scale = -delta_scale; - startBand = target_lsb; - stopBand = target_usb; - - if (new_lsb > old_lsb) { - /* The lowband has to be rescaled */ - hSbrDec->sbrScaleFactor.ov_lb_scale = source_scale; - } - else { - /* The highband has be be rescaled */ - hSbrDec->sbrScaleFactor.ov_hb_scale = source_scale; - } - } - - FDK_ASSERT(startBand <= stopBand); - - if (!useLP) { - for (l=0; l<startSlot; l++) { - scaleValues( OverlapBufferReal[l] + startBand, stopBand-startBand, delta_scale ); - scaleValues( OverlapBufferImag[l] + startBand, stopBand-startBand, delta_scale ); - } - } else - for (l=0; l<startSlot; l++) { - scaleValues( OverlapBufferReal[l] + startBand, stopBand-startBand, delta_scale ); - } - - - /* - 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; - - 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); - - - return sbrError; -} |