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Diffstat (limited to 'fdk-aac/libAACdec/src/channel.cpp')
| -rw-r--r-- | fdk-aac/libAACdec/src/channel.cpp | 924 |
1 files changed, 924 insertions, 0 deletions
diff --git a/fdk-aac/libAACdec/src/channel.cpp b/fdk-aac/libAACdec/src/channel.cpp new file mode 100644 index 0000000..a020034 --- /dev/null +++ b/fdk-aac/libAACdec/src/channel.cpp @@ -0,0 +1,924 @@ +/* ----------------------------------------------------------------------------- +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 +----------------------------------------------------------------------------- */ + +/**************************** AAC decoder library ****************************** + + Author(s): Josef Hoepfl + + Description: + +*******************************************************************************/ + +#include "channel.h" +#include "aacdecoder.h" +#include "block.h" +#include "aacdec_tns.h" +#include "FDK_bitstream.h" + +#include "conceal.h" + +#include "rvlc.h" + +#include "aacdec_hcr.h" + +#include "usacdec_lpd.h" +#include "usacdec_fac.h" + +static void MapMidSideMaskToPnsCorrelation( + CAacDecoderChannelInfo *pAacDecoderChannelInfo[2]) { + int group; + + for (group = 0; group < pAacDecoderChannelInfo[L]->icsInfo.WindowGroups; + group++) { + UCHAR groupMask = 1 << group; + + for (UCHAR band = 0; band < pAacDecoderChannelInfo[L]->icsInfo.MaxSfBands; + band++) { + if (pAacDecoderChannelInfo[L]->pComData->jointStereoData.MsUsed[band] & + groupMask) { /* channels are correlated */ + CPns_SetCorrelation(&pAacDecoderChannelInfo[L]->data.aac.PnsData, group, + band, 0); + + if (CPns_IsPnsUsed(&pAacDecoderChannelInfo[L]->data.aac.PnsData, group, + band) && + CPns_IsPnsUsed(&pAacDecoderChannelInfo[R]->data.aac.PnsData, group, + band)) + pAacDecoderChannelInfo[L]->pComData->jointStereoData.MsUsed[band] ^= + groupMask; /* clear the groupMask-bit */ + } + } + } +} + +static void Clean_Complex_Prediction_coefficients( + CJointStereoPersistentData *pJointStereoPersistentData, int windowGroups, + const int low_limit, const int high_limit) { + for (int group = 0; group < windowGroups; group++) { + for (int sfb = low_limit; sfb < high_limit; sfb++) { + pJointStereoPersistentData->alpha_q_re_prev[group][sfb] = 0; + pJointStereoPersistentData->alpha_q_im_prev[group][sfb] = 0; + } + } +} + +/*! + \brief Decode channel pair element + + The function decodes a channel pair element. + + \return none +*/ +void CChannelElement_Decode( + CAacDecoderChannelInfo + *pAacDecoderChannelInfo[2], /*!< pointer to aac decoder channel info */ + CAacDecoderStaticChannelInfo *pAacDecoderStaticChannelInfo[2], + SamplingRateInfo *pSamplingRateInfo, UINT flags, UINT elFlags, + int el_channels) { + int ch = 0; + + int maxSfBandsL = 0, maxSfBandsR = 0; + int maybe_jstereo = (el_channels > 1); + + if (flags & (AC_USAC | AC_RSVD50 | AC_RSV603DA) && el_channels == 2) { + if (pAacDecoderChannelInfo[L]->data.usac.core_mode || + pAacDecoderChannelInfo[R]->data.usac.core_mode) { + maybe_jstereo = 0; + } + } + + if (maybe_jstereo) { + maxSfBandsL = + GetScaleFactorBandsTransmitted(&pAacDecoderChannelInfo[L]->icsInfo); + maxSfBandsR = + GetScaleFactorBandsTransmitted(&pAacDecoderChannelInfo[R]->icsInfo); + + /* apply ms */ + if (pAacDecoderChannelInfo[L]->pDynData->RawDataInfo.CommonWindow) { + if (!(flags & (AC_USAC | AC_RSVD50 | AC_RSV603DA))) { + if (pAacDecoderChannelInfo[L]->data.aac.PnsData.PnsActive || + pAacDecoderChannelInfo[R]->data.aac.PnsData.PnsActive) { + MapMidSideMaskToPnsCorrelation(pAacDecoderChannelInfo); + } + } + /* if tns_on_lr == 1 run MS */ /* && + (pAacDecoderChannelInfo[L]->pDynData->specificTo.usac.tns_active + == 1) */ + if (((flags & (AC_USAC | AC_RSVD50 | AC_RSV603DA)) && + (pAacDecoderChannelInfo[L]->pDynData->specificTo.usac.tns_on_lr == + 1)) || + ((flags & (AC_USAC | AC_RSVD50 | AC_RSV603DA)) == 0)) { + int max_sfb_ste = (INT)(pAacDecoderChannelInfo[L]->icsInfo.max_sfb_ste); + + CJointStereo_ApplyMS( + pAacDecoderChannelInfo, pAacDecoderStaticChannelInfo, + pAacDecoderChannelInfo[L]->pSpectralCoefficient, + pAacDecoderChannelInfo[R]->pSpectralCoefficient, + pAacDecoderChannelInfo[L]->pDynData->aSfbScale, + pAacDecoderChannelInfo[R]->pDynData->aSfbScale, + pAacDecoderChannelInfo[L]->specScale, + pAacDecoderChannelInfo[R]->specScale, + GetScaleFactorBandOffsets(&pAacDecoderChannelInfo[L]->icsInfo, + pSamplingRateInfo), + GetWindowGroupLengthTable(&pAacDecoderChannelInfo[L]->icsInfo), + GetWindowGroups(&pAacDecoderChannelInfo[L]->icsInfo), max_sfb_ste, + maxSfBandsL, maxSfBandsR, + pAacDecoderChannelInfo[L] + ->pComData->jointStereoData.store_dmx_re_prev, + &(pAacDecoderChannelInfo[L] + ->pComData->jointStereoData.store_dmx_re_prev_e), + 1); + + } /* if ( ((elFlags & AC_EL_USAC_CP_POSSIBLE).... */ + } /* if (pAacDecoderChannelInfo[L]->pDynData->RawDataInfo.CommonWindow)*/ + + /* apply intensity stereo */ /* modifies pAacDecoderChannelInfo[]->aSpecSfb + */ + if (!(flags & (AC_USAC | AC_RSVD50 | AC_RSV603DA))) { + if ((pAacDecoderChannelInfo[L]->pDynData->RawDataInfo.CommonWindow == + 1) && + (el_channels == 2)) { + CJointStereo_ApplyIS( + pAacDecoderChannelInfo, + GetScaleFactorBandOffsets(&pAacDecoderChannelInfo[L]->icsInfo, + pSamplingRateInfo), + GetWindowGroupLengthTable(&pAacDecoderChannelInfo[L]->icsInfo), + GetWindowGroups(&pAacDecoderChannelInfo[L]->icsInfo), + GetScaleFactorBandsTransmitted( + &pAacDecoderChannelInfo[L]->icsInfo)); + } + } + } /* maybe_stereo */ + + for (ch = 0; ch < el_channels; ch++) { + if (pAacDecoderChannelInfo[ch]->renderMode == AACDEC_RENDER_LPD) { + /* Decode LPD data */ + CLpdChannelStream_Decode(pAacDecoderChannelInfo[ch], + pAacDecoderStaticChannelInfo[ch], flags); + } else { + UCHAR noSfbs = + GetScaleFactorBandsTransmitted(&pAacDecoderChannelInfo[ch]->icsInfo); + /* For USAC common window: max_sfb of both channels may differ + * (common_max_sfb == 0). */ + if ((maybe_jstereo == 1) && + (pAacDecoderChannelInfo[L]->pDynData->RawDataInfo.CommonWindow == + 1)) { + noSfbs = fMax(maxSfBandsL, maxSfBandsR); + } + int CP_active = 0; + if (elFlags & AC_EL_USAC_CP_POSSIBLE) { + CP_active = pAacDecoderChannelInfo[ch] + ->pComData->jointStereoData.cplx_pred_flag; + } + + /* Omit writing of pAacDecoderChannelInfo[ch]->specScale for complex + stereo prediction since scaling has already been carried out. */ + int max_sfb_ste = (INT)(pAacDecoderChannelInfo[L]->icsInfo.max_sfb_ste); + + if ((!CP_active) || (CP_active && (max_sfb_ste < noSfbs)) || + ((flags & (AC_USAC | AC_RSVD50 | AC_RSV603DA)) && + (pAacDecoderChannelInfo[L]->pDynData->specificTo.usac.tns_on_lr == + 0))) { + CBlock_ScaleSpectralData(pAacDecoderChannelInfo[ch], noSfbs, + pSamplingRateInfo); + + /*Active for the case of TNS applied before MS/CP*/ + if ((flags & (AC_USAC | AC_RSVD50 | AC_RSV603DA)) && + (pAacDecoderChannelInfo[L]->pDynData->specificTo.usac.tns_on_lr == + 0)) { + if (IsLongBlock(&pAacDecoderChannelInfo[ch]->icsInfo)) { + for (int i = 0; i < noSfbs; i++) { + pAacDecoderChannelInfo[ch]->pDynData->aSfbScale[i] = + pAacDecoderChannelInfo[ch]->specScale[0]; + } + } else { + for (int i = 0; i < 8; i++) { + for (int j = 0; j < noSfbs; j++) { + pAacDecoderChannelInfo[ch]->pDynData->aSfbScale[i * 16 + j] = + pAacDecoderChannelInfo[ch]->specScale[i]; + } + } + } + } + } + } + } /* End "for (ch = 0; ch < el_channels; ch++)" */ + + if (maybe_jstereo) { + /* apply ms */ + if (pAacDecoderChannelInfo[L]->pDynData->RawDataInfo.CommonWindow) { + } /* CommonWindow */ + else { + if (elFlags & AC_EL_USAC_CP_POSSIBLE) { + FDKmemclear( + pAacDecoderStaticChannelInfo[L] + ->pCpeStaticData->jointStereoPersistentData.alpha_q_re_prev, + JointStereoMaximumGroups * JointStereoMaximumBands * sizeof(SHORT)); + FDKmemclear( + pAacDecoderStaticChannelInfo[L] + ->pCpeStaticData->jointStereoPersistentData.alpha_q_im_prev, + JointStereoMaximumGroups * JointStereoMaximumBands * sizeof(SHORT)); + } + } + + } /* if (maybe_jstereo) */ + + for (ch = 0; ch < el_channels; ch++) { + if (pAacDecoderChannelInfo[ch]->renderMode == AACDEC_RENDER_LPD) { + } else { + if (!(flags & (AC_USAC | AC_RSVD50 | AC_RSV603DA))) { + /* Use same seed for coupled channels (CPE) */ + int pnsCh = (ch > 0) ? L : ch; + CPns_UpdateNoiseState( + &pAacDecoderChannelInfo[ch]->data.aac.PnsData, + pAacDecoderChannelInfo[pnsCh]->data.aac.PnsData.currentSeed, + pAacDecoderChannelInfo[ch]->pComData->pnsRandomSeed); + } + + if ((!(flags & (AC_USAC))) || + ((flags & (AC_USAC)) && + (pAacDecoderChannelInfo[L]->pDynData->specificTo.usac.tns_active == + 1)) || + (maybe_jstereo == 0)) { + ApplyTools( + pAacDecoderChannelInfo, pSamplingRateInfo, flags, elFlags, ch, + pAacDecoderChannelInfo[L]->pDynData->RawDataInfo.CommonWindow); + } + } /* End "} else" */ + } /* End "for (ch = 0; ch < el_channels; ch++)" */ + + if (maybe_jstereo) { + /* apply ms */ + if (pAacDecoderChannelInfo[L]->pDynData->RawDataInfo.CommonWindow) { + /* if tns_on_lr == 0 run MS */ + if ((flags & (AC_USAC | AC_RSVD50 | AC_RSV603DA)) && + (pAacDecoderChannelInfo[L]->pDynData->specificTo.usac.tns_on_lr == + 0)) { + int max_sfb_ste = (INT)(pAacDecoderChannelInfo[L]->icsInfo.max_sfb_ste); + + CJointStereo_ApplyMS( + pAacDecoderChannelInfo, pAacDecoderStaticChannelInfo, + pAacDecoderChannelInfo[L]->pSpectralCoefficient, + pAacDecoderChannelInfo[R]->pSpectralCoefficient, + pAacDecoderChannelInfo[L]->pDynData->aSfbScale, + pAacDecoderChannelInfo[R]->pDynData->aSfbScale, + pAacDecoderChannelInfo[L]->specScale, + pAacDecoderChannelInfo[R]->specScale, + GetScaleFactorBandOffsets(&pAacDecoderChannelInfo[L]->icsInfo, + pSamplingRateInfo), + GetWindowGroupLengthTable(&pAacDecoderChannelInfo[L]->icsInfo), + GetWindowGroups(&pAacDecoderChannelInfo[L]->icsInfo), max_sfb_ste, + maxSfBandsL, maxSfBandsR, + pAacDecoderChannelInfo[L] + ->pComData->jointStereoData.store_dmx_re_prev, + &(pAacDecoderChannelInfo[L] + ->pComData->jointStereoData.store_dmx_re_prev_e), + 1); + } + + } /* if (pAacDecoderChannelInfo[L]->pDynData->RawDataInfo.CommonWindow) */ + + } /* if (maybe_jstereo) */ + + for (ch = 0; ch < el_channels; ch++) { + if (elFlags & AC_EL_USAC_CP_POSSIBLE) { + pAacDecoderStaticChannelInfo[L] + ->pCpeStaticData->jointStereoPersistentData.clearSpectralCoeffs = 0; + } + } + + CRvlc_ElementCheck(pAacDecoderChannelInfo, pAacDecoderStaticChannelInfo, + flags, el_channels); +} + +void CChannel_CodebookTableInit( + CAacDecoderChannelInfo *pAacDecoderChannelInfo) { + int b, w, maxBands, maxWindows; + int maxSfb = GetScaleFactorBandsTransmitted(&pAacDecoderChannelInfo->icsInfo); + UCHAR *pCodeBook = pAacDecoderChannelInfo->pDynData->aCodeBook; + + if (IsLongBlock(&pAacDecoderChannelInfo->icsInfo)) { + maxBands = 64; + maxWindows = 1; + } else { + maxBands = 16; + maxWindows = 8; + } + + for (w = 0; w < maxWindows; w++) { + for (b = 0; b < maxSfb; b++) { + pCodeBook[b] = ESCBOOK; + } + for (; b < maxBands; b++) { + pCodeBook[b] = ZERO_HCB; + } + pCodeBook += maxBands; + } +} + +/* + * Arbitrary order bitstream parser + */ +AAC_DECODER_ERROR CChannelElement_Read( + HANDLE_FDK_BITSTREAM hBs, CAacDecoderChannelInfo *pAacDecoderChannelInfo[], + CAacDecoderStaticChannelInfo *pAacDecoderStaticChannelInfo[], + const AUDIO_OBJECT_TYPE aot, SamplingRateInfo *pSamplingRateInfo, + const UINT flags, const UINT elFlags, const UINT frame_length, + const UCHAR numberOfChannels, const SCHAR epConfig, + HANDLE_TRANSPORTDEC pTpDec) { + AAC_DECODER_ERROR error = AAC_DEC_OK; + const element_list_t *list; + int i, ch, decision_bit; + int crcReg1 = -1, crcReg2 = -1; + int cplxPred; + int ind_sw_cce_flag = 0, num_gain_element_lists = 0; + + FDK_ASSERT((numberOfChannels == 1) || (numberOfChannels == 2)); + + /* Get channel element sequence table */ + list = getBitstreamElementList(aot, epConfig, numberOfChannels, 0, elFlags); + if (list == NULL) { + error = AAC_DEC_UNSUPPORTED_FORMAT; + goto bail; + } + + CTns_Reset(&pAacDecoderChannelInfo[0]->pDynData->TnsData); + /* Set common window to 0 by default. If signalized in the bit stream it will + * be overwritten later explicitely */ + pAacDecoderChannelInfo[0]->pDynData->RawDataInfo.CommonWindow = 0; + if (flags & (AC_USAC | AC_RSVD50 | AC_RSV603DA)) { + pAacDecoderChannelInfo[0]->pDynData->specificTo.usac.tns_active = 0; + pAacDecoderChannelInfo[0]->pDynData->specificTo.usac.tns_on_lr = 0; + } + if (numberOfChannels == 2) { + CTns_Reset(&pAacDecoderChannelInfo[1]->pDynData->TnsData); + pAacDecoderChannelInfo[1]->pDynData->RawDataInfo.CommonWindow = 0; + } + + cplxPred = 0; + if (pAacDecoderStaticChannelInfo != NULL) { + if (elFlags & AC_EL_USAC_CP_POSSIBLE) { + pAacDecoderChannelInfo[0]->pComData->jointStereoData.cplx_pred_flag = 0; + cplxPred = 1; + } + } + + if (0 || (flags & (AC_ELD | AC_SCALABLE))) { + pAacDecoderChannelInfo[0]->pDynData->RawDataInfo.CommonWindow = 1; + if (numberOfChannels == 2) { + pAacDecoderChannelInfo[1]->pDynData->RawDataInfo.CommonWindow = + pAacDecoderChannelInfo[0]->pDynData->RawDataInfo.CommonWindow; + } + } + + /* Iterate through sequence table */ + i = 0; + ch = 0; + decision_bit = 0; + do { + switch (list->id[i]) { + case element_instance_tag: + pAacDecoderChannelInfo[0]->ElementInstanceTag = FDKreadBits(hBs, 4); + if (numberOfChannels == 2) { + pAacDecoderChannelInfo[1]->ElementInstanceTag = + pAacDecoderChannelInfo[0]->ElementInstanceTag; + } + break; + case common_window: + decision_bit = + pAacDecoderChannelInfo[ch]->pDynData->RawDataInfo.CommonWindow = + FDKreadBits(hBs, 1); + if (numberOfChannels == 2) { + pAacDecoderChannelInfo[1]->pDynData->RawDataInfo.CommonWindow = + pAacDecoderChannelInfo[0]->pDynData->RawDataInfo.CommonWindow; + } + break; + case ics_info: + /* store last window sequence (utilized in complex stereo prediction) + * before reading new channel-info */ + if (cplxPred) { + if (pAacDecoderChannelInfo[0]->pDynData->RawDataInfo.CommonWindow) { + pAacDecoderStaticChannelInfo[0] + ->pCpeStaticData->jointStereoPersistentData.winSeqPrev = + pAacDecoderChannelInfo[0]->icsInfo.WindowSequence; + pAacDecoderStaticChannelInfo[0] + ->pCpeStaticData->jointStereoPersistentData.winShapePrev = + pAacDecoderChannelInfo[0]->icsInfo.WindowShape; + } + } + /* Read individual channel info */ + error = IcsRead(hBs, &pAacDecoderChannelInfo[ch]->icsInfo, + pSamplingRateInfo, flags); + + if (elFlags & AC_EL_LFE && + GetWindowSequence(&pAacDecoderChannelInfo[ch]->icsInfo) != + BLOCK_LONG) { + error = AAC_DEC_PARSE_ERROR; + break; + } + + if (numberOfChannels == 2 && + pAacDecoderChannelInfo[0]->pDynData->RawDataInfo.CommonWindow) { + pAacDecoderChannelInfo[1]->icsInfo = + pAacDecoderChannelInfo[0]->icsInfo; + } + break; + + case common_max_sfb: + if (FDKreadBit(hBs) == 0) { + error = IcsReadMaxSfb(hBs, &pAacDecoderChannelInfo[1]->icsInfo, + pSamplingRateInfo); + } + break; + + case ltp_data_present: + if (FDKreadBits(hBs, 1) != 0) { + error = AAC_DEC_UNSUPPORTED_PREDICTION; + } + break; + + case ms: + + INT max_sfb_ste; + INT max_sfb_ste_clear; + + max_sfb_ste = GetScaleMaxFactorBandsTransmitted( + &pAacDecoderChannelInfo[0]->icsInfo, + &pAacDecoderChannelInfo[1]->icsInfo); + + max_sfb_ste_clear = 64; + + pAacDecoderChannelInfo[0]->icsInfo.max_sfb_ste = (UCHAR)max_sfb_ste; + pAacDecoderChannelInfo[1]->icsInfo.max_sfb_ste = (UCHAR)max_sfb_ste; + + if (flags & (AC_USAC | AC_RSV603DA) && + pAacDecoderChannelInfo[ch]->pDynData->RawDataInfo.CommonWindow == + 0) { + Clean_Complex_Prediction_coefficients( + &pAacDecoderStaticChannelInfo[0] + ->pCpeStaticData->jointStereoPersistentData, + GetWindowGroups(&pAacDecoderChannelInfo[0]->icsInfo), 0, 64); + } + + if (CJointStereo_Read( + hBs, &pAacDecoderChannelInfo[0]->pComData->jointStereoData, + GetWindowGroups(&pAacDecoderChannelInfo[0]->icsInfo), + max_sfb_ste, max_sfb_ste_clear, + /* jointStereoPersistentData and cplxPredictionData are only + available/allocated if cplxPred is active. */ + ((cplxPred == 0) || (pAacDecoderStaticChannelInfo == NULL)) + ? NULL + : &pAacDecoderStaticChannelInfo[0] + ->pCpeStaticData->jointStereoPersistentData, + ((cplxPred == 0) || (pAacDecoderChannelInfo[0] == NULL)) + ? NULL + : pAacDecoderChannelInfo[0] + ->pComStaticData->cplxPredictionData, + cplxPred, + GetScaleFactorBandsTotal(&pAacDecoderChannelInfo[0]->icsInfo), + GetWindowSequence(&pAacDecoderChannelInfo[0]->icsInfo), + flags)) { + error = AAC_DEC_PARSE_ERROR; + } + + break; + + case global_gain: + pAacDecoderChannelInfo[ch]->pDynData->RawDataInfo.GlobalGain = + (UCHAR)FDKreadBits(hBs, 8); + break; + + case section_data: + error = CBlock_ReadSectionData(hBs, pAacDecoderChannelInfo[ch], + pSamplingRateInfo, flags); + break; + + case scale_factor_data_usac: + pAacDecoderChannelInfo[ch]->currAliasingSymmetry = 0; + /* Set active sfb codebook indexes to HCB_ESC to make them "active" */ + CChannel_CodebookTableInit( + pAacDecoderChannelInfo[ch]); /* equals ReadSectionData(self, + bs) in float soft. block.c + line: ~599 */ + /* Note: The missing "break" is intentional here, since we need to call + * CBlock_ReadScaleFactorData(). */ + FDK_FALLTHROUGH; + + case scale_factor_data: + if (flags & AC_ER_RVLC) { + /* read RVLC data from bitstream (error sens. cat. 1) */ + CRvlc_Read(pAacDecoderChannelInfo[ch], hBs); + } else { + error = CBlock_ReadScaleFactorData(pAacDecoderChannelInfo[ch], hBs, + flags); + } + break; + + case pulse: + if (CPulseData_Read( + hBs, + &pAacDecoderChannelInfo[ch]->pDynData->specificTo.aac.PulseData, + pSamplingRateInfo->ScaleFactorBands_Long, /* pulse data is only + allowed to be + present in long + blocks! */ + (void *)&pAacDecoderChannelInfo[ch]->icsInfo, + frame_length) != 0) { + error = AAC_DEC_DECODE_FRAME_ERROR; + } + break; + case tns_data_present: + CTns_ReadDataPresentFlag( + hBs, &pAacDecoderChannelInfo[ch]->pDynData->TnsData); + if (elFlags & AC_EL_LFE && + pAacDecoderChannelInfo[ch]->pDynData->TnsData.DataPresent) { + error = AAC_DEC_PARSE_ERROR; + } + break; + case tns_data: + /* tns_data_present is checked inside CTns_Read(). */ + error = CTns_Read(hBs, &pAacDecoderChannelInfo[ch]->pDynData->TnsData, + &pAacDecoderChannelInfo[ch]->icsInfo, flags); + + break; + + case gain_control_data: + break; + + case gain_control_data_present: + if (FDKreadBits(hBs, 1)) { + error = AAC_DEC_UNSUPPORTED_GAIN_CONTROL_DATA; + } + break; + + case tw_data: + break; + case common_tw: + break; + case tns_data_present_usac: + if (pAacDecoderChannelInfo[0]->pDynData->specificTo.usac.tns_active) { + CTns_ReadDataPresentUsac( + hBs, &pAacDecoderChannelInfo[0]->pDynData->TnsData, + &pAacDecoderChannelInfo[1]->pDynData->TnsData, + &pAacDecoderChannelInfo[0]->pDynData->specificTo.usac.tns_on_lr, + &pAacDecoderChannelInfo[0]->icsInfo, flags, elFlags, + pAacDecoderChannelInfo[0]->pDynData->RawDataInfo.CommonWindow); + } else { + pAacDecoderChannelInfo[0]->pDynData->specificTo.usac.tns_on_lr = + (UCHAR)1; + } + break; + case core_mode: + decision_bit = FDKreadBits(hBs, 1); + pAacDecoderChannelInfo[ch]->data.usac.core_mode = decision_bit; + if ((ch == 1) && (pAacDecoderChannelInfo[0]->data.usac.core_mode != + pAacDecoderChannelInfo[1]->data.usac.core_mode)) { + /* StereoCoreToolInfo(core_mode[ch] ) */ + pAacDecoderChannelInfo[0]->pDynData->RawDataInfo.CommonWindow = 0; + pAacDecoderChannelInfo[1]->pDynData->RawDataInfo.CommonWindow = 0; + } + break; + case tns_active: + pAacDecoderChannelInfo[0]->pDynData->specificTo.usac.tns_active = + FDKreadBit(hBs); + break; + case noise: + if (elFlags & AC_EL_USAC_NOISE) { + pAacDecoderChannelInfo[ch] + ->pDynData->specificTo.usac.fd_noise_level_and_offset = + FDKreadBits(hBs, 3 + 5); /* Noise level */ + } + break; + case lpd_channel_stream: + + { + error = CLpdChannelStream_Read(/* = lpd_channel_stream() */ + hBs, pAacDecoderChannelInfo[ch], + pAacDecoderStaticChannelInfo[ch], + pSamplingRateInfo, flags); + } + + pAacDecoderChannelInfo[ch]->renderMode = AACDEC_RENDER_LPD; + break; + case fac_data: { + int fFacDatPresent = FDKreadBit(hBs); + + /* Wee need a valid fac_data[0] even if no FAC data is present (as + * temporal buffer) */ + pAacDecoderChannelInfo[ch]->data.usac.fac_data[0] = + pAacDecoderChannelInfo[ch]->data.usac.fac_data0; + + if (fFacDatPresent) { + if (elFlags & AC_EL_LFE) { + error = AAC_DEC_PARSE_ERROR; + break; + } + /* FAC data present, this frame is FD, so the last mode had to be + * ACELP. */ + if (pAacDecoderStaticChannelInfo[ch]->last_core_mode != LPD || + pAacDecoderStaticChannelInfo[ch]->last_lpd_mode != 0) { + pAacDecoderChannelInfo[ch]->data.usac.core_mode_last = LPD; + pAacDecoderChannelInfo[ch]->data.usac.lpd_mode_last = 0; + /* We can't change the past! So look to the future and go ahead! */ + } + CLpd_FAC_Read(hBs, pAacDecoderChannelInfo[ch]->data.usac.fac_data[0], + pAacDecoderChannelInfo[ch]->data.usac.fac_data_e, + CLpd_FAC_getLength( + IsLongBlock(&pAacDecoderChannelInfo[ch]->icsInfo), + pAacDecoderChannelInfo[ch]->granuleLength), + 1, 0); + } else { + if (pAacDecoderStaticChannelInfo[ch]->last_core_mode == LPD && + pAacDecoderStaticChannelInfo[ch]->last_lpd_mode == 0) { + /* ACELP to FD transitons without FAC are possible. That is why we + zero it out (i.e FAC will not be considered in the subsequent + calculations */ + FDKmemclear(pAacDecoderChannelInfo[ch]->data.usac.fac_data0, + LFAC * sizeof(FIXP_DBL)); + } + } + } break; + case esc2_rvlc: + if (flags & AC_ER_RVLC) { + CRvlc_Decode(pAacDecoderChannelInfo[ch], + pAacDecoderStaticChannelInfo[ch], hBs); + } + break; + + case esc1_hcr: + if (flags & AC_ER_HCR) { + CHcr_Read(hBs, pAacDecoderChannelInfo[ch], + numberOfChannels == 2 ? ID_CPE : ID_SCE); + } + break; + + case spectral_data: + error = CBlock_ReadSpectralData(hBs, pAacDecoderChannelInfo[ch], + pSamplingRateInfo, flags); + if (flags & AC_ELD) { + pAacDecoderChannelInfo[ch]->renderMode = AACDEC_RENDER_ELDFB; + } else { + if (flags & AC_HDAAC) { + pAacDecoderChannelInfo[ch]->renderMode = AACDEC_RENDER_INTIMDCT; + } else { + pAacDecoderChannelInfo[ch]->renderMode = AACDEC_RENDER_IMDCT; + } + } + break; + + case ac_spectral_data: + error = CBlock_ReadAcSpectralData( + hBs, pAacDecoderChannelInfo[ch], pAacDecoderStaticChannelInfo[ch], + pSamplingRateInfo, frame_length, flags); + pAacDecoderChannelInfo[ch]->renderMode = AACDEC_RENDER_IMDCT; + break; + + case coupled_elements: { + int num_coupled_elements, c; + + ind_sw_cce_flag = FDKreadBit(hBs); + num_coupled_elements = FDKreadBits(hBs, 3); + + for (c = 0; c < (num_coupled_elements + 1); c++) { + int cc_target_is_cpe; + + num_gain_element_lists++; + cc_target_is_cpe = FDKreadBit(hBs); /* cc_target_is_cpe[c] */ + FDKreadBits(hBs, 4); /* cc_target_tag_select[c] */ + + if (cc_target_is_cpe) { + int cc_l, cc_r; + + cc_l = FDKreadBit(hBs); /* cc_l[c] */ + cc_r = FDKreadBit(hBs); /* cc_r[c] */ + + if (cc_l && cc_r) { + num_gain_element_lists++; + } + } + } + FDKreadBit(hBs); /* cc_domain */ + FDKreadBit(hBs); /* gain_element_sign */ + FDKreadBits(hBs, 2); /* gain_element_scale */ + } break; + + case gain_element_lists: { + const CodeBookDescription *hcb; + UCHAR *pCodeBook; + int c; + + hcb = &AACcodeBookDescriptionTable[BOOKSCL]; + pCodeBook = pAacDecoderChannelInfo[ch]->pDynData->aCodeBook; + + for (c = 1; c < num_gain_element_lists; c++) { + int cge; + if (ind_sw_cce_flag) { + cge = 1; + } else { + cge = FDKreadBits(hBs, 1); /* common_gain_element_present[c] */ + } + if (cge) { + /* Huffman */ + CBlock_DecodeHuffmanWord( + hBs, hcb); /* hcod_sf[common_gain_element[c]] 1..19 */ + } else { + int g, sfb; + for (g = 0; + g < GetWindowGroups(&pAacDecoderChannelInfo[ch]->icsInfo); + g++) { + for (sfb = 0; sfb < GetScaleFactorBandsTransmitted( + &pAacDecoderChannelInfo[ch]->icsInfo); + sfb++) { + if (pCodeBook[sfb] != ZERO_HCB) { + /* Huffman */ + CBlock_DecodeHuffmanWord( + hBs, + hcb); /* hcod_sf[dpcm_gain_element[c][g][sfb]] 1..19 */ + } + } + } + } + } + } break; + + /* CRC handling */ + case adtscrc_start_reg1: + if (pTpDec != NULL) { + crcReg1 = transportDec_CrcStartReg(pTpDec, 192); + } + break; + case adtscrc_start_reg2: + if (pTpDec != NULL) { + crcReg2 = transportDec_CrcStartReg(pTpDec, 128); + } + break; + case adtscrc_end_reg1: + case drmcrc_end_reg: + if (pTpDec != NULL) { + transportDec_CrcEndReg(pTpDec, crcReg1); + crcReg1 = -1; + } + break; + case adtscrc_end_reg2: + if (crcReg1 != -1) { + error = AAC_DEC_DECODE_FRAME_ERROR; + } else if (pTpDec != NULL) { + transportDec_CrcEndReg(pTpDec, crcReg2); + crcReg2 = -1; + } + break; + case drmcrc_start_reg: + if (pTpDec != NULL) { + crcReg1 = transportDec_CrcStartReg(pTpDec, 0); + } + break; + + /* Non data cases */ + case next_channel: + ch = (ch + 1) % numberOfChannels; + break; + case link_sequence: + list = list->next[decision_bit]; + i = -1; + break; + + default: + error = AAC_DEC_UNSUPPORTED_FORMAT; + break; + } + + if (error != AAC_DEC_OK) { + goto bail; + } + + i++; + + } while (list->id[i] != end_of_sequence); + + for (ch = 0; ch < numberOfChannels; ch++) { + if (pAacDecoderChannelInfo[ch]->renderMode == AACDEC_RENDER_IMDCT || + pAacDecoderChannelInfo[ch]->renderMode == AACDEC_RENDER_ELDFB) { + /* Shows which bands are empty. */ + UCHAR *band_is_noise = + pAacDecoderChannelInfo[ch]->pDynData->band_is_noise; + FDKmemset(band_is_noise, (UCHAR)1, sizeof(UCHAR) * (8 * 16)); + + error = CBlock_InverseQuantizeSpectralData( + pAacDecoderChannelInfo[ch], pSamplingRateInfo, band_is_noise, 1); + if (error != AAC_DEC_OK) { + return error; + } + + if (elFlags & AC_EL_USAC_NOISE) { + CBlock_ApplyNoise(pAacDecoderChannelInfo[ch], pSamplingRateInfo, + &pAacDecoderStaticChannelInfo[ch]->nfRandomSeed, + band_is_noise); + + } /* if (elFlags & AC_EL_USAC_NOISE) */ + } + } + +bail: + if (crcReg1 != -1 || crcReg2 != -1) { + if (error == AAC_DEC_OK) { + error = AAC_DEC_DECODE_FRAME_ERROR; + } + if (crcReg1 != -1) { + transportDec_CrcEndReg(pTpDec, crcReg1); + } + if (crcReg2 != -1) { + transportDec_CrcEndReg(pTpDec, crcReg2); + } + } + return error; +} |