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e016635f0d
Bug: 149514474 Test: atest DecoderTestXheAac DecoderTestAacDrc Change-Id: I8a504ab709e42e27a61fe29840212953742283a5
206 lines
7.5 KiB
C
206 lines
7.5 KiB
C
/* -----------------------------------------------------------------------------
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Software License for The Fraunhofer FDK AAC Codec Library for Android
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© Copyright 1995 - 2019 Fraunhofer-Gesellschaft zur Förderung der angewandten
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Forschung e.V. All rights reserved.
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1. INTRODUCTION
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The Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software
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that implements the MPEG Advanced Audio Coding ("AAC") encoding and decoding
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scheme for digital audio. This FDK AAC Codec software is intended to be used on
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a wide variety of Android devices.
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AAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient
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general perceptual audio codecs. AAC-ELD is considered the best-performing
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full-bandwidth communications codec by independent studies and is widely
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deployed. AAC has been standardized by ISO and IEC as part of the MPEG
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specifications.
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Patent licenses for necessary patent claims for the FDK AAC Codec (including
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those of Fraunhofer) may be obtained through Via Licensing
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(www.vialicensing.com) or through the respective patent owners individually for
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the purpose of encoding or decoding bit streams in products that are compliant
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with the ISO/IEC MPEG audio standards. Please note that most manufacturers of
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Android devices already license these patent claims through Via Licensing or
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directly from the patent owners, and therefore FDK AAC Codec software may
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already be covered under those patent licenses when it is used for those
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licensed purposes only.
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Commercially-licensed AAC software libraries, including floating-point versions
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with enhanced sound quality, are also available from Fraunhofer. Users are
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encouraged to check the Fraunhofer website for additional applications
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information and documentation.
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2. COPYRIGHT LICENSE
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Redistribution and use in source and binary forms, with or without modification,
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are permitted without payment of copyright license fees provided that you
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satisfy the following conditions:
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You must retain the complete text of this software license in redistributions of
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the FDK AAC Codec or your modifications thereto in source code form.
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You must retain the complete text of this software license in the documentation
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and/or other materials provided with redistributions of the FDK AAC Codec or
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your modifications thereto in binary form. You must make available free of
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charge copies of the complete source code of the FDK AAC Codec and your
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modifications thereto to recipients of copies in binary form.
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The name of Fraunhofer may not be used to endorse or promote products derived
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from this library without prior written permission.
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You may not charge copyright license fees for anyone to use, copy or distribute
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the FDK AAC Codec software or your modifications thereto.
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Your modified versions of the FDK AAC Codec must carry prominent notices stating
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that you changed the software and the date of any change. For modified versions
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of the FDK AAC Codec, the term "Fraunhofer FDK AAC Codec Library for Android"
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must be replaced by the term "Third-Party Modified Version of the Fraunhofer FDK
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AAC Codec Library for Android."
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3. NO PATENT LICENSE
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NO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without
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limitation the patents of Fraunhofer, ARE GRANTED BY THIS SOFTWARE LICENSE.
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Fraunhofer provides no warranty of patent non-infringement with respect to this
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software.
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You may use this FDK AAC Codec software or modifications thereto only for
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purposes that are authorized by appropriate patent licenses.
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4. DISCLAIMER
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This FDK AAC Codec software is provided by Fraunhofer on behalf of the copyright
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holders and contributors "AS IS" and WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES,
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including but not limited to the implied warranties of merchantability and
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fitness for a particular purpose. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
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CONTRIBUTORS BE LIABLE for any direct, indirect, incidental, special, exemplary,
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or consequential damages, including but not limited to procurement of substitute
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goods or services; loss of use, data, or profits, or business interruption,
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however caused and on any theory of liability, whether in contract, strict
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liability, or tort (including negligence), arising in any way out of the use of
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this software, even if advised of the possibility of such damage.
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5. CONTACT INFORMATION
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Fraunhofer Institute for Integrated Circuits IIS
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Attention: Audio and Multimedia Departments - FDK AAC LL
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Am Wolfsmantel 33
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91058 Erlangen, Germany
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www.iis.fraunhofer.de/amm
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amm-info@iis.fraunhofer.de
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----------------------------------------------------------------------------- */
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/**************************** SBR decoder library ******************************
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Author(s):
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Description:
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*******************************************************************************/
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/*!
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\file
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\brief Sbr decoder
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*/
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#ifndef SBR_DEC_H
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#define SBR_DEC_H
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#include "sbrdecoder.h"
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#include "lpp_tran.h"
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#include "qmf.h"
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#include "env_calc.h"
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#include "FDK_audio.h"
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#include "sbrdec_drc.h"
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#include "pvc_dec.h"
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#include "hbe.h"
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enum SBRDEC_QMF_SKIP {
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qmfSkipNothing = 0,
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qmfSkipAnalysis = 1 << 0,
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qmfSkipSynthesis = 1 << 1
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};
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typedef struct {
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SBR_CALCULATE_ENVELOPE SbrCalculateEnvelope;
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SBR_LPP_TRANS LppTrans;
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PVC_STATIC_DATA PvcStaticData;
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/* do scale handling in sbr an not in qmf */
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SHORT scale_ov;
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SHORT scale_lb;
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SHORT scale_hbe;
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SHORT prev_frame_lSbr;
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SHORT prev_frame_hbeSbr;
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int codecFrameSize;
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HANDLE_HBE_TRANSPOSER hHBE;
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HANDLE_FDK_QMF_DOMAIN_IN qmfDomainInCh;
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HANDLE_FDK_QMF_DOMAIN_OUT qmfDomainOutCh;
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SBRDEC_DRC_CHANNEL sbrDrcChannel;
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#if (SBRDEC_MAX_HB_FADE_FRAMES > 0)
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INT highBandFadeCnt; /* counter for fading in high-band signal smoothly */
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#endif
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FIXP_DBL **tmp_memory; /* shared memory between hbeLightTimeDelayBuffer and
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hQmfHBESlotsReal */
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FIXP_DBL **hQmfHBESlotsReal;
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FIXP_DBL **hQmfHBESlotsImag;
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FIXP_DBL **codecQMFBufferReal;
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FIXP_DBL **codecQMFBufferImag;
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UCHAR savedStates;
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int applySbrProc_old;
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} SBR_DEC;
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typedef SBR_DEC *HANDLE_SBR_DEC;
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typedef struct {
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SBR_FRAME_DATA frameData[(1) + 1];
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SBR_PREV_FRAME_DATA prevFrameData;
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SBR_DEC SbrDec;
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} SBR_CHANNEL;
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typedef SBR_CHANNEL *HANDLE_SBR_CHANNEL;
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void sbr_dec(
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HANDLE_SBR_DEC hSbrDec, /*!< handle to Decoder channel */
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LONG *timeIn, /*!< pointer to input time signal */
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LONG *timeOut, /*!< pointer to output time signal */
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HANDLE_SBR_DEC hSbrDecRight, /*!< handle to Decoder channel right */
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LONG *timeOutRight, /*!< pointer to output time signal */
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INT strideOut, /*!< Time data traversal strideOut */
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HANDLE_SBR_HEADER_DATA hHeaderData, /*!< Static control data */
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HANDLE_SBR_FRAME_DATA hFrameData, /*!< Control data of current frame */
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HANDLE_SBR_PREV_FRAME_DATA
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hPrevFrameData, /*!< Some control data of last frame */
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const int applyProcessing, /*!< Flag for SBR operation */
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HANDLE_PS_DEC h_ps_d, const UINT flags, const int codecFrameSize,
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const INT sbrInDataHeadroom);
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SBR_ERROR
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createSbrDec(SBR_CHANNEL *hSbrChannel, HANDLE_SBR_HEADER_DATA hHeaderData,
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TRANSPOSER_SETTINGS *pSettings, const int downsampleFac,
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const UINT qmfFlags, const UINT flags, const int overlap, int chan,
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int codecFrameSize);
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int deleteSbrDec(SBR_CHANNEL *hSbrChannel);
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SBR_ERROR
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resetSbrDec(HANDLE_SBR_DEC hSbrDec, HANDLE_SBR_HEADER_DATA hHeaderData,
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HANDLE_SBR_PREV_FRAME_DATA hPrevFrameData, const int downsampleFac,
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const UINT flags, HANDLE_SBR_FRAME_DATA hFrameData);
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#endif
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