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diff --git a/fdk-aac/libSACdec/src/sac_tsd.h b/fdk-aac/libSACdec/src/sac_tsd.h new file mode 100644 index 0000000..2521e27 --- /dev/null +++ b/fdk-aac/libSACdec/src/sac_tsd.h @@ -0,0 +1,167 @@ +/* ----------------------------------------------------------------------------- +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 +----------------------------------------------------------------------------- */ + +/*********************** MPEG surround decoder library ************************* + + Author(s): Matthias Hildenbrand + + Description: USAC MPS212 Transient Steering Decorrelator (TSD) + +*******************************************************************************/ + +#ifndef SAC_TSD_H +#define SAC_TSD_H + +#include "FDK_bitstream.h" +#include "common_fix.h" + +#define MAX_TSD_TIME_SLOTS (64) + +/** Structure which holds the data needed to apply TSD to current frame. */ +typedef struct { + UCHAR bsTsdEnable; /**< for current frame TSD is (0:disabled, 1:enabled) */ + UCHAR numSlots; /**< total number of QMF slots per frame */ + SCHAR + bsTsdTrPhaseData[MAX_TSD_TIME_SLOTS]; /**< -1 => TsdSepData[ts]=0; 0-7: + values of bsTsdTrPhaseData[ts] + and TsdSepData[ts]=1 */ +} TSD_DATA; + +FDK_INLINE int isTsdActive(const TSD_DATA *pTsdData) { + return (int)pTsdData->bsTsdEnable; +} + +/** + * \brief Parse and Decode TSD data. + * \param[in] hBs bitstream handle to read data from. + * \param[in] numSlots number of QMF slots per frame. + * \param[out] pTsdData pointer to TSD data structure. + * \return 0 on succes, 1 on error. + */ +int TsdRead(HANDLE_FDK_BITSTREAM hBs, const int numSlots, TSD_DATA *pTsdData); + +/** + * \brief Perform transient seperation (v_{x,nonTr} signal). + * \param[in] numHybridBands number of hybrid bands. + * \param[in] pTsdData pointer to TSD data structure. + * \param[in] pVdirectReal pointer to array with direct signal. + * \param[in] pVdirectImag pointer to array with direct signal. + * \param[out] pVnonTrReal pointer to array with nonTr signal. + * \param[out] pVnonTrImag pointer to array with nonTr signal. + * \param[out] ppDecorrInReal handle to array where allpass based decorrelator + * should read from (modified by this function). + * \param[out] ppDecorrInImag handle to array where allpass based decorrelator + * should read from (modified by this function). + */ +void TsdGenerateNonTr(const int numHybridBands, const TSD_DATA *pTsdData, + const int ts, FIXP_DBL *pVdirectReal, + FIXP_DBL *pVdirectImag, FIXP_DBL *pVnonTrReal, + FIXP_DBL *pVnonTrImag, FIXP_DBL **ppDecorrInReal, + FIXP_DBL **ppDecorrInImag); + +/** + * \brief Generate d_{x,Tr} signal and add to d_{x,nonTr} signal + * \param[in] numHybridBands + * \param[in,out] pTsdData + * \param pTsdTs pointer to persistent time slot counter + * \param[in] pVdirectReal + * \param[in] pVdirectImag + * \param[out] pDnonTrReal + * \param[out] pDnonTrImag + */ +void TsdApply(const int numHybridBands, const TSD_DATA *pTsdData, int *pTsdTs, + const FIXP_DBL *pVdirectReal, const FIXP_DBL *pVdirectImag, + FIXP_DBL *pDnonTrReal, FIXP_DBL *pDnonTrImag); + +#endif /* #ifndef SAC_TSD_H */ |