| /* ----------------------------------------------------------------------------- |
| 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): |
| |
| Description: SAC Processing |
| |
| *******************************************************************************/ |
| |
| /*! |
| \file |
| \brief Polyphase Filterbank |
| */ |
| |
| #ifndef SAC_PROCESS_H |
| #define SAC_PROCESS_H |
| |
| #include "sac_dec.h" |
| |
| void SpatialDecApplyPhase(spatialDec *self, FIXP_SGL alpha, |
| int lastSlotOfParamSet); |
| |
| /** |
| * \brief Apply QMF Analysis Filterbank. |
| * |
| * Calculates qmf data on downmix input time data. |
| * Delaylines will be applied if necessaray. |
| * |
| * \param self A spatial decoder handle. |
| * \param inData Downmix channel time data as input. |
| * \param ts Signals time slot offset for input buffer. |
| * \param qmfReal Downmix channel qmf output data. |
| * \param qmfImag Downmix channel qmf output data. |
| * |
| * \return Error status. |
| */ |
| SACDEC_ERROR SpatialDecQMFAnalysis(spatialDec *self, const PCM_MPS *inData, |
| const INT ts, const INT bypassMode, |
| FIXP_DBL **qmfReal, FIXP_DBL **qmfImag, |
| const int numInputChannels); |
| |
| /** |
| * \brief Feed spatial decoder with external qmf data. |
| * |
| * \param self A spatial decoder handle. |
| * \param qmfInDataReal External qmf downmix data as input. |
| * \param qmfInDataImag External qmf downmix data as input. |
| * \param ts Signals time slot in input buffer to process. |
| * \param qmfReal Downmix channel qmf output data. |
| * \param qmfImag Downmix channel qmf output data. |
| * \param numInputChannels Number of input channels. Might differ from |
| * self->numInputChannels. |
| * |
| * \return Error status. |
| */ |
| SACDEC_ERROR SpatialDecFeedQMF(spatialDec *self, FIXP_DBL **qmfInDataReal, |
| FIXP_DBL **qmfInDataImag, const INT ts, |
| const INT bypassMode, FIXP_DBL **qmfReal, |
| FIXP_DBL **qmfImag, const INT numInputChannels); |
| |
| /** |
| * \brief Apply Hybrdid Analysis Filterbank. |
| * |
| * Calculates hybrid data on downmix input data. |
| * Residual hybrid signals will also be calculated on current slot if available. |
| * |
| * \param self A spatial decoder handle. |
| * \param qmfInputReal Downmix channel qmf data as input. |
| * \param qmfInputImag Downmix channel qmf data as input. |
| * \param hybOutputReal Downmix channel hybrid output data. |
| * \param hybOutputImag Downmix channel hybrid output data. |
| * \param ts Signals time slot in spatial frame to process. |
| * \param numInputChannels Number of input channels. Might differ from |
| * self->numInputChannels. |
| * |
| * \return Error status. |
| */ |
| SACDEC_ERROR SpatialDecHybridAnalysis(spatialDec *self, FIXP_DBL **qmfInputReal, |
| FIXP_DBL **qmfInputImag, |
| FIXP_DBL **hybOutputReal, |
| FIXP_DBL **hybOutputImag, const INT ts, |
| const INT numInputChannels); |
| |
| /** |
| * \brief Create X data. |
| * |
| * Returns a pointer list over Xchannels pointing to downmix input channels |
| * and to residual channels when provided. |
| * |
| * \param self A spatial decoder handle. |
| * \param hybInputReal Downmix channel hybrid data as input. |
| * \param hybInputImag Downmix channel hybrid data as input. |
| * \param pxReal Pointer to hybrid and residual data as output. |
| * \param pxImag Pointer to hybrid and residual data as output. |
| * |
| * \return Error status. |
| */ |
| SACDEC_ERROR SpatialDecCreateX(spatialDec *self, FIXP_DBL **hybInputReal, |
| FIXP_DBL **hybInputImag, FIXP_DBL **pxReal, |
| FIXP_DBL **pxImag); |
| |
| /** |
| * \brief MPS212 combined version of apply M1 parameters and create wet signal |
| * |
| * \param self A spatial decoder handle. |
| * \param xReal Downmix and residual X data as input. |
| * \param xImag Downmix and residual X data as input. |
| * \param vReal output data: [0] direct signal (V); [1] wet signal |
| * (W). |
| * \param vImag output data: [0] direct signal (V); [1] wet signal |
| * (W). |
| * |
| * \return Error status. |
| */ |
| SACDEC_ERROR SpatialDecApplyM1_CreateW_Mode212( |
| spatialDec *self, const SPATIAL_BS_FRAME *frame, FIXP_DBL **xReal, |
| FIXP_DBL **xImag, FIXP_DBL **vReal, FIXP_DBL **vImag); |
| |
| /** |
| * \brief Apply M2 parameters. |
| * |
| * \param self A spatial decoder handle. |
| * \param ps Signals parameter band from where M2 parameter to |
| * use. |
| * \param alpha Smoothing factor between current and previous |
| * parameter band. Rangeability between 0.f and 1.f. |
| * \param wReal Wet input data. |
| * \param wImag Wet input data. |
| * \param hybOutputRealDry Dry output data. |
| * \param hybOutputImagDry Dry output data. |
| * \param hybOutputRealWet Wet output data. |
| * \param hybOutputImagWet Wet output data. |
| * |
| * \return Error status. |
| */ |
| SACDEC_ERROR SpatialDecApplyM2(spatialDec *self, INT ps, const FIXP_SGL alpha, |
| FIXP_DBL **wReal, FIXP_DBL **wImag, |
| FIXP_DBL **hybOutputRealDry, |
| FIXP_DBL **hybOutputImagDry, |
| FIXP_DBL **hybOutputRealWet, |
| FIXP_DBL **hybOutputImagWet); |
| |
| /** |
| * \brief Apply M2 parameter for 212 mode with residualCoding and phaseCoding. |
| * |
| * \param self [i] A spatial decoder handle. |
| * \param ps [i] Signals parameter band from where M2 parameter |
| * to use. |
| * \param alpha [i] Smoothing factor between current and previous |
| * parameter band. Rangeability between 0.f and 1.f. |
| * \param wReal [i] Wet input data. |
| * \param wImag [i] Wet input data. |
| * \param hybOutputRealDry [o] Dry output data. |
| * \param hybOutputImagDry [o] Dry output data. |
| * |
| * \return error |
| */ |
| SACDEC_ERROR SpatialDecApplyM2_Mode212_ResidualsPlusPhaseCoding( |
| spatialDec *self, INT ps, const FIXP_SGL alpha, FIXP_DBL **wReal, |
| FIXP_DBL **wImag, FIXP_DBL **hybOutputRealDry, FIXP_DBL **hybOutputImagDry); |
| |
| /** |
| * \brief Apply M2 parameter for 212 mode, upmix from mono to stereo. |
| * |
| * \param self [i] A spatial decoder handle. |
| * \param ps [i] Signals parameter band from where M2 parameter |
| * to use. |
| * \param alpha [i] Smoothing factor between current and previous |
| * parameter band. Rangeability between 0.f and 1.f. |
| * \param wReal [i] Wet input data. |
| * \param wImag [i] Wet input data. |
| * \param hybOutputRealDry [o] Dry output data. |
| * \param hybOutputImagDry [o] Dry output data. |
| * |
| * \return error |
| */ |
| SACDEC_ERROR SpatialDecApplyM2_Mode212(spatialDec *self, INT ps, |
| const FIXP_SGL alpha, FIXP_DBL **wReal, |
| FIXP_DBL **wImag, |
| FIXP_DBL **hybOutputRealDry, |
| FIXP_DBL **hybOutputImagDry); |
| |
| /** |
| * \brief Convert Hybrid input to output audio data. |
| * |
| * \param hSpaceSynthesisQmf A spatial decoder handle. |
| * \param ts Signals time slot in spatial frame to process. |
| * \param hybOutputReal Hybrid data as input. |
| * \param hybOutputImag Hybrid data as input. |
| * \param timeOut audio output data. |
| * |
| * \return Error status. |
| */ |
| SACDEC_ERROR SpatialDecSynthesis(spatialDec *self, const INT ts, |
| FIXP_DBL **hybOutputReal, |
| FIXP_DBL **hybOutputImag, PCM_MPS *timeOut, |
| const INT numInputChannels, |
| const FDK_channelMapDescr *const mapDescr); |
| |
| void SpatialDecBufferMatrices(spatialDec *self); |
| |
| FIXP_DBL getChGain(spatialDec *self, UINT ch, INT *scale); |
| |
| #endif |
