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Diffstat (limited to 'fdk-aac/libAACdec/src/usacdec_fac.h')
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diff --git a/fdk-aac/libAACdec/src/usacdec_fac.h b/fdk-aac/libAACdec/src/usacdec_fac.h new file mode 100644 index 0000000..100a6fa --- /dev/null +++ b/fdk-aac/libAACdec/src/usacdec_fac.h @@ -0,0 +1,191 @@ +/* ----------------------------------------------------------------------------- +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): Manuel Jander + + Description: USAC FAC + +*******************************************************************************/ + +#ifndef USACDEC_FAC_H +#define USACDEC_FAC_H + +#include "channelinfo.h" +#include "FDK_bitstream.h" + +/** + * \brief Get the address of a memory area of the spectral data memory were the + * FAC data can be stored into. + * \param spec SPECTRAL_PTR pointing to the current spectral data. + * \param mod the current LPD mod array. + * \param pState pointer to a private state variable which must be 0 for the + * first call and not changed externally. + * \param isFullbandLPD is 1 if fullband LPD mode is on, otherwise it is 0. + */ +FIXP_DBL *CLpd_FAC_GetMemory(CAacDecoderChannelInfo *pAacDecoderChannelInfo, + UCHAR mod[NB_SUBFR], int *pState); + +/** + * \brief read a fac bitstream data block. + * \param hBs a bit stream handle, where the fac bitstream data is located. + * \param pFac pointer to were the FAC data will be stored into. + * \param pFacScale pointer to were the FAC data scale value will be stored + * into. + * \param tcx_gain value to be used as FAC gain. If zero, read fac_gain from + * bitstream. + * \param tcx_gain_e exponen value of tcx_gain. + * \param frame the subframe to be considered from the current superframe. + * Always 0 for FD case. + * \return 0 on success, -1 on error. + */ +int CLpd_FAC_Read(HANDLE_FDK_BITSTREAM hBs, FIXP_DBL *pFac, SCHAR *pFacScale, + int length, int use_gain, int frame); + +/** + * \brief Apply TCX and ALFD gains to FAC data. + * \param fac_data pointer to FAC data. + * \param fac_length FAC length (128 or 96). + * \param tcx_gain TCX gain + * \param alfd_gains pointer to alfd gains. + * \param mod mod value (1,2,3) of TCX frame where the FAC signal needs to be + * applied. + */ +void CFac_ApplyGains(FIXP_DBL fac_data[LFAC], const INT fac_length, + const FIXP_DBL tcx_gain, const FIXP_DBL alfd_gains[], + const INT mod); + +/** + * \brief Do FAC transition from frequency domain to ACELP domain. + */ +INT CLpd_FAC_Mdct2Acelp(H_MDCT hMdct, FIXP_DBL *output, FIXP_DBL *pFac_data, + const int fac_data_e, FIXP_LPC *A, INT A_exp, + INT nrOutSamples, const INT fac_length, + const INT isFdFac, UCHAR prevWindowShape); + +/** + * \brief Do FAC transition from ACELP domain to frequency domain. + * \param hMdct MDCT context. + * \param output pointer for time domain output. + * \param pSpec pointer to MDCT spectrum input. + * \param spec_scale MDCT spectrum exponents. + * \param nSpec amount of contiguos MDCT spectra. + * \param pFac pointer to FAC MDCT domain data. + * \param fac_scale exponent of FAC data. + * \param fac_length length of FAC data. + * \param nrSamples room in samples in output buffer. + * \param tl MDCT transform length of pSpec. + * \param wrs right MDCT window slope. + * \param fr right MDCT window slope length. + * \param A LP domain filter coefficients. + * \param deemph_mem deemphasis filter state. + * \param gain gain to be applied to FAC data before overlap add. + * \param old_syn_mem Synthesis filter state. + * \param isFdFac indicates fac processing from or to FD. + * \param pFacData fac data stored for fullband LPD. + * \param elFlags element specific parser guidance flags. + * \param isFacForFullband indicates that fac is processed for fullband LPD. + */ +INT CLpd_FAC_Acelp2Mdct(H_MDCT hMdct, FIXP_DBL *output, FIXP_DBL *pSpec, + const SHORT spec_scale[], const int nSpec, + FIXP_DBL *pFac_data, const int fac_data_e, + const INT fac_length, INT nrSamples, const INT tl, + const FIXP_WTP *wrs, const INT fr, FIXP_LPC A[16], + INT A_exp, CAcelpStaticMem *acelp_mem, + const FIXP_DBL gain, const int last_frame_lost, + const int isFdFac, const UCHAR last_lpd, const int k, + int currAliasingSymmetry); + +#endif /* USACDEC_FAC_H */ |