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diff --git a/fdk-aac/libFDK/include/FDK_hybrid.h b/fdk-aac/libFDK/include/FDK_hybrid.h new file mode 100644 index 0000000..583f299 --- /dev/null +++ b/fdk-aac/libFDK/include/FDK_hybrid.h @@ -0,0 +1,255 @@ +/* ----------------------------------------------------------------------------- +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 +----------------------------------------------------------------------------- */ + +/******************* Library for basic calculation routines ******************** + + Author(s): Markus Lohwasser + + Description: FDK Tools Hybrid Filterbank + +*******************************************************************************/ + +#ifndef FDK_HYBRID_H +#define FDK_HYBRID_H + +#include "common_fix.h" + +/*--------------- enums -------------------------------*/ + +/** + * Hybrid Filterband modes. + */ +typedef enum { + THREE_TO_TEN, + THREE_TO_TWELVE, + THREE_TO_SIXTEEN + +} FDK_HYBRID_MODE; + +/*--------------- structure definitions ---------------*/ +typedef const struct FDK_HYBRID_SETUP *HANDLE_FDK_HYBRID_SETUP; + +typedef struct { + FIXP_DBL *bufferLFReal[3]; /*!< LF real filter states. */ + FIXP_DBL *bufferLFImag[3]; /*!< LF imag filter states. */ + FIXP_DBL *bufferHFReal[13]; /*!< HF real delay lines. */ + FIXP_DBL *bufferHFImag[13]; /*!< HF imag delay lines. */ + + INT bufferLFpos; /*!< Position to write incoming data into ringbuffer. */ + INT bufferHFpos; /*!< Delay line positioning. */ + INT nrBands; /*!< Number of QMF bands. */ + INT cplxBands; /*!< Number of complex QMF bands.*/ + UCHAR hfMode; /*!< Flag signalizes treatment of HF bands. */ + + FIXP_DBL *pLFmemory; /*!< Pointer to LF states buffer. */ + FIXP_DBL *pHFmemory; /*!< Pointer to HF states buffer. */ + + UINT LFmemorySize; /*!< Size of LF states buffer. */ + UINT HFmemorySize; /*!< Size of HF states buffer. */ + + HANDLE_FDK_HYBRID_SETUP pSetup; /*!< Pointer to filter setup. */ + +} FDK_ANA_HYB_FILTER; + +typedef struct { + INT nrBands; /*!< Number of QMF bands. */ + INT cplxBands; /*!< Number of complex QMF bands.*/ + + HANDLE_FDK_HYBRID_SETUP pSetup; /*!< Pointer to filter setup. */ + +} FDK_SYN_HYB_FILTER; + +typedef FDK_ANA_HYB_FILTER *HANDLE_FDK_ANA_HYB_FILTER; +typedef FDK_SYN_HYB_FILTER *HANDLE_FDK_SYN_HYB_FILTER; + +/** + * \brief Create one instance of Hybrid Analyis Filterbank. + * + * \param hAnalysisHybFilter Pointer to an outlying allocated Hybrid Analysis + * Filterbank structure. + * \param pLFmemory Pointer to outlying buffer used LF filtering. + * \param LFmemorySize Size of pLFmemory in bytes. + * \param pHFmemory Pointer to outlying buffer used HF delay line. + * \param HFmemorySize Size of pLFmemory in bytes. + * + * \return 0 on success. + */ +INT FDKhybridAnalysisOpen(HANDLE_FDK_ANA_HYB_FILTER hAnalysisHybFilter, + FIXP_DBL *const pLFmemory, const UINT LFmemorySize, + FIXP_DBL *const pHFmemory, const UINT HFmemorySize); + +/** + * \brief Initialize and configure Hybrid Analysis Filterbank instance. + * + * \param hAnalysisHybFilter A Hybrid Analysis Filterbank handle. + * \param mode Select hybrid filter configuration. + * \param qmfBands Number of qmf bands to be processed. + * \param cplxBands Number of complex qmf bands to be processed. + * \param initStatesFlag Indicates whether the states buffer has to be + * cleared. + * + * \return 0 on success. + */ +INT FDKhybridAnalysisInit(HANDLE_FDK_ANA_HYB_FILTER hAnalysisHybFilter, + const FDK_HYBRID_MODE mode, const INT qmfBands, + const INT cplxBands, const INT initStatesFlag); + +/** + * \brief Adjust Hybrid Analysis Filterbank states. + * + * \param hAnalysisHybFilter A Hybrid Analysis Filterbank handle. + * \param scalingValue Scaling value to be applied on filter states. + * + * \return 0 on success. + */ +INT FDKhybridAnalysisScaleStates(HANDLE_FDK_ANA_HYB_FILTER hAnalysisHybFilter, + const INT scalingValue); + +/** + * \brief Apply Hybrid Analysis Filterbank on Qmf input data. + * + * \param hAnalysisHybFilter A Hybrid Analysis Filterbank handle. + * \param pQmfReal Qmf input data. + * \param pQmfImag Qmf input data. + * \param pHybridReal Hybrid output data. + * \param pHybridImag Hybrid output data. + * + * \return 0 on success. + */ +INT FDKhybridAnalysisApply(HANDLE_FDK_ANA_HYB_FILTER hAnalysisHybFilter, + const FIXP_DBL *const pQmfReal, + const FIXP_DBL *const pQmfImag, + FIXP_DBL *const pHybridReal, + FIXP_DBL *const pHybridImag); + +/** + * \brief Close a Hybrid Analysis Filterbank instance. + * + * \param hAnalysisHybFilter Pointer to a Hybrid Analysis Filterbank instance. + * + * \return 0 on success. + */ +INT FDKhybridAnalysisClose(HANDLE_FDK_ANA_HYB_FILTER hAnalysisHybFilter); + +/** + * \brief Initialize and configure Hybrdid Synthesis Filterbank instance. + * + * \param hSynthesisHybFilter A Hybrid Synthesis Filterbank handle. + * \param mode Select hybrid filter configuration. + * \param qmfBands Number of qmf bands to be processed. + * \param cplxBands Number of complex qmf bands to be processed. + * + * \return 0 on success. + */ +INT FDKhybridSynthesisInit(HANDLE_FDK_SYN_HYB_FILTER hSynthesisHybFilter, + const FDK_HYBRID_MODE mode, const INT qmfBands, + const INT cplxBands); + +/** + * \brief Apply Hybrid Analysis Filterbank on Hybrid data. + * + * \param hSynthesisHybFilter A Hybrid Analysis Filterbandk handle. + * \param pHybridReal Hybrid input data. + * \param pHybridImag Hybrid input data. + * \param pQmfReal Qmf output data. + * \param pQmfImag Qmf output data. + * + */ +void FDKhybridSynthesisApply(HANDLE_FDK_SYN_HYB_FILTER hSynthesisHybFilter, + const FIXP_DBL *const pHybridReal, + const FIXP_DBL *const pHybridImag, + FIXP_DBL *const pQmfReal, + FIXP_DBL *const pQmfImag); + +#endif /* FDK_HYBRID_H */ |