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Diffstat (limited to 'libAACdec/src/channel.cpp')
| -rw-r--r-- | libAACdec/src/channel.cpp | 451 |
1 files changed, 0 insertions, 451 deletions
diff --git a/libAACdec/src/channel.cpp b/libAACdec/src/channel.cpp deleted file mode 100644 index 5475079..0000000 --- a/libAACdec/src/channel.cpp +++ /dev/null @@ -1,451 +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 ------------------------------------------------------------------------------------------------------------ */ - -/***************************** MPEG-4 AAC Decoder ************************** - - Author(s): Josef Hoepfl - Description: - -******************************************************************************/ - -#include "channel.h" -#include "aacdecoder.h" -#include "block.h" -#include "aacdec_tns.h" -#include "FDK_bitstream.h" -#include "FDK_tools_rom.h" - -#include "conceal.h" - -#include "rvlc.h" - -#include "aacdec_hcr.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 */ - } - } - } -} - -/*! - \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, - int el_channels) -{ - int ch, maybe_jstereo = 0; - - maybe_jstereo = (el_channels > 1); - - for (ch = 0; ch < el_channels; ch++) { - if ( pAacDecoderChannelInfo[ch]->renderMode == AACDEC_RENDER_IMDCT - || pAacDecoderChannelInfo[ch]->renderMode == AACDEC_RENDER_ELDFB ) - { - CBlock_InverseQuantizeSpectralData(pAacDecoderChannelInfo[ch], pSamplingRateInfo); - } - } - - - - if (maybe_jstereo) { - /* apply ms */ - if (pAacDecoderChannelInfo[L]->pDynData->RawDataInfo.CommonWindow) { - int maxSfBandsL = GetScaleFactorBandsTransmitted(&pAacDecoderChannelInfo[L]->icsInfo); - int maxSfBandsR = GetScaleFactorBandsTransmitted(&pAacDecoderChannelInfo[R]->icsInfo); - if (pAacDecoderChannelInfo[L]->data.aac.PnsData.PnsActive || pAacDecoderChannelInfo[R]->data.aac.PnsData.PnsActive) { - MapMidSideMaskToPnsCorrelation(pAacDecoderChannelInfo); - } - - CJointStereo_ApplyMS(pAacDecoderChannelInfo, - GetScaleFactorBandOffsets(&pAacDecoderChannelInfo[L]->icsInfo, pSamplingRateInfo), - GetWindowGroupLengthTable(&pAacDecoderChannelInfo[L]->icsInfo), - GetWindowGroups(&pAacDecoderChannelInfo[L]->icsInfo), - maxSfBandsL, - maxSfBandsR); - } - - /* apply intensity stereo */ /* modifies pAacDecoderChannelInfo[]->aSpecSfb */ - CJointStereo_ApplyIS(pAacDecoderChannelInfo, - GetScaleFactorBandOffsets(&pAacDecoderChannelInfo[L]->icsInfo, pSamplingRateInfo), - GetWindowGroupLengthTable(&pAacDecoderChannelInfo[L]->icsInfo), - GetWindowGroups(&pAacDecoderChannelInfo[L]->icsInfo), - GetScaleFactorBandsTransmitted(&pAacDecoderChannelInfo[L]->icsInfo), - pAacDecoderChannelInfo[L]->pDynData->RawDataInfo.CommonWindow ? 1 : 0); - - } - - for (ch = 0; ch < el_channels; ch++) - { - { - /* write pAacDecoderChannelInfo[ch]->specScale */ - CBlock_ScaleSpectralData(pAacDecoderChannelInfo[ch], pSamplingRateInfo); - - ApplyTools (pAacDecoderChannelInfo, pSamplingRateInfo, flags, ch); - } - - } - - 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, - const SamplingRateInfo *pSamplingRateInfo, - const UINT flags, - 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; - - FDK_ASSERT( (numberOfChannels == 1) || (numberOfChannels == 2) ); - - /* Get channel element sequence table */ - list = getBitstreamElementList(aot, epConfig, numberOfChannels, 0); - if (list == NULL) { - error = AAC_DEC_UNSUPPORTED_FORMAT; - goto bail; - } - - CTns_Reset(&pAacDecoderChannelInfo[0]->pDynData->TnsData); - if (numberOfChannels == 2) { - CTns_Reset(&pAacDecoderChannelInfo[1]->pDynData->TnsData); - } - - if (flags & (AC_ELD|AC_SCALABLE)) { - pAacDecoderChannelInfo[0]->pDynData->RawDataInfo.CommonWindow = 1; - if (numberOfChannels == 2) { - pAacDecoderChannelInfo[1]->pDynData->RawDataInfo.CommonWindow = pAacDecoderChannelInfo[0]->pDynData->RawDataInfo.CommonWindow; - } - 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: - /* Read individual channel info */ - error = IcsRead( hBs, - &pAacDecoderChannelInfo[ch]->icsInfo, - pSamplingRateInfo, - flags ); - - if (numberOfChannels == 2 && pAacDecoderChannelInfo[0]->pDynData->RawDataInfo.CommonWindow) { - pAacDecoderChannelInfo[1]->icsInfo = pAacDecoderChannelInfo[0]->icsInfo; - } - break; - - - case ltp_data_present: - if (FDKreadBits(hBs, 1) != 0) { - error = AAC_DEC_UNSUPPORTED_PREDICTION; - } - break; - - case ms: - if ( CJointStereo_Read( - hBs, - &pAacDecoderChannelInfo[0]->pComData->jointStereoData, - GetWindowGroups(&pAacDecoderChannelInfo[0]->icsInfo), - GetScaleMaxFactorBandsTransmitted(&pAacDecoderChannelInfo[0]->icsInfo, - &pAacDecoderChannelInfo[1]->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: - 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); - 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 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] ); - } - break; - - case spectral_data: - error = CBlock_ReadSpectralData( hBs, - pAacDecoderChannelInfo[ch], - pSamplingRateInfo, - flags ); - if (flags & AC_ELD) { - pAacDecoderChannelInfo[ch]->renderMode = AACDEC_RENDER_ELDFB; - } else { - pAacDecoderChannelInfo[ch]->renderMode = AACDEC_RENDER_IMDCT; - } - 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); - } - break; - case adtscrc_end_reg2: - if (pTpDec != NULL) { - transportDec_CrcEndReg(pTpDec, crcReg2); - } - 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); - -bail: - return error; -} |