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diff --git a/fdk-aac/libSACdec/src/sac_process.h b/fdk-aac/libSACdec/src/sac_process.h new file mode 100644 index 0000000..ee2f2fe --- /dev/null +++ b/fdk-aac/libSACdec/src/sac_process.h @@ -0,0 +1,297 @@ +/* ----------------------------------------------------------------------------- +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 |