| /* ----------------------------------------------------------------------------- |
| 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 |
| ----------------------------------------------------------------------------- */ |
| |
| /**************************** SBR encoder library ****************************** |
| |
| Author(s): |
| |
| Description: |
| |
| *******************************************************************************/ |
| |
| /*! |
| \file |
| \brief General tonality correction detector module. |
| */ |
| #ifndef TON_CORR_H |
| #define TON_CORR_H |
| |
| #include "sbr_encoder.h" |
| #include "mh_det.h" |
| #include "nf_est.h" |
| #include "invf_est.h" |
| |
| #define MAX_NUM_PATCHES 6 |
| #define SCALE_NRGVEC 4 |
| |
| /** parameter set for one single patch */ |
| typedef struct { |
| INT sourceStartBand; /*!< first band in lowbands where to take the samples |
| from */ |
| INT sourceStopBand; /*!< first band in lowbands which is not included in the |
| patch anymore */ |
| INT guardStartBand; /*!< first band in highbands to be filled with zeros in |
| order to reduce interferences between patches */ |
| INT targetStartBand; /*!< first band in highbands to be filled with whitened |
| lowband signal */ |
| INT targetBandOffs; /*!< difference between 'startTargetBand' and |
| 'startSourceBand' */ |
| INT numBandsInPatch; /*!< number of consecutive bands in this one patch */ |
| } PATCH_PARAM; |
| |
| typedef struct { |
| INT switchInverseFilt; /*!< Flag to enable dynamic adaption of invf. detection |
| */ |
| INT noQmfChannels; |
| INT bufferLength; /*!< Length of the r and i buffers. */ |
| INT stepSize; /*!< Stride for the lpc estimate. */ |
| INT numberOfEstimates; /*!< The total number of estiamtes, available in the |
| quotaMatrix.*/ |
| UINT numberOfEstimatesPerFrame; /*!< The number of estimates per frame |
| available in the quotaMatrix.*/ |
| INT lpcLength[2]; /*!< Segment length used for second order LPC analysis.*/ |
| INT nextSample; /*!< Where to start the LPC analysis of the current frame.*/ |
| INT move; /*!< How many estimates to move in the quotaMatrix, when buffering. |
| */ |
| INT frameStartIndex; /*!< The start index for the current frame in the r and i |
| buffers. */ |
| INT startIndexMatrix; /*!< The start index for the current frame in the |
| quotaMatrix. */ |
| INT frameStartIndexInvfEst; /*!< The start index of the inverse filtering, not |
| the same as the others, dependent on what |
| decoder is used (buffer opt, or no buffer opt). |
| */ |
| INT prevTransientFlag; /*!< The transisent flag (from the transient detector) |
| for the previous frame. */ |
| INT transientNextFrame; /*!< Flag to indicate that the transient will show up |
| in the next frame. */ |
| INT transientPosOffset; /*!< An offset value to match the transient pos as |
| calculated by the transient detector with the |
| actual position in the frame.*/ |
| |
| INT* signMatrix[MAX_NO_OF_ESTIMATES]; /*!< Matrix holding the sign of each |
| channe, i.e. indicating in what part |
| of a QMF channel a possible sine is. |
| */ |
| |
| FIXP_DBL* quotaMatrix[MAX_NO_OF_ESTIMATES]; /*!< Matrix holding the quota |
| values for all estimates, all |
| channels. */ |
| |
| FIXP_DBL nrgVector[MAX_NO_OF_ESTIMATES]; /*!< Vector holding the averaged |
| energies for every QMF band. */ |
| FIXP_DBL nrgVectorFreq[64]; /*!< Vector holding the averaged energies for |
| every QMF channel */ |
| |
| SCHAR indexVector[64]; /*!< Index vector poINTing to the correct lowband |
| channel, when indexing a highband channel, -1 |
| represents a guard band */ |
| PATCH_PARAM |
| patchParam[MAX_NUM_PATCHES]; /*!< new parameter set for patching */ |
| INT guard; /*!< number of guardbands between every patch */ |
| INT shiftStartSb; /*!< lowest subband of source range to be included in the |
| patches */ |
| INT noOfPatches; /*!< number of patches */ |
| |
| SBR_MISSING_HARMONICS_DETECTOR |
| sbrMissingHarmonicsDetector; /*!< SBR_MISSING_HARMONICS_DETECTOR struct. |
| */ |
| SBR_NOISE_FLOOR_ESTIMATE |
| sbrNoiseFloorEstimate; /*!< SBR_NOISE_FLOOR_ESTIMATE struct. */ |
| SBR_INV_FILT_EST sbrInvFilt; /*!< SBR_INV_FILT_EST struct. */ |
| } SBR_TON_CORR_EST; |
| |
| typedef SBR_TON_CORR_EST* HANDLE_SBR_TON_CORR_EST; |
| |
| void FDKsbrEnc_TonCorrParamExtr( |
| HANDLE_SBR_TON_CORR_EST hTonCorr, /*!< Handle to SBR_TON_CORR struct. */ |
| INVF_MODE* infVec, /*!< Vector where the inverse filtering levels will be |
| stored. */ |
| FIXP_DBL* noiseLevels, /*!< Vector where the noise levels will be stored. */ |
| INT* missingHarmonicFlag, /*!< Flag set to one or zero, dependent on if any |
| strong sines are missing.*/ |
| UCHAR* missingHarmonicsIndex, /*!< Vector indicating where sines are |
| missing. */ |
| UCHAR* envelopeCompensation, /*!< Vector to store compensation values for |
| the energies in. */ |
| const SBR_FRAME_INFO* frameInfo, /*!< Frame info struct, contains the time |
| and frequency grid of the current |
| frame.*/ |
| UCHAR* transientInfo, /*!< Transient info.*/ |
| UCHAR* freqBandTable, /*!< Frequency band tables for high-res.*/ |
| INT nSfb, /*!< Number of scalefactor bands for high-res. */ |
| XPOS_MODE xposType, /*!< Type of transposer used in the decoder.*/ |
| UINT sbrSyntaxFlags); |
| |
| INT FDKsbrEnc_CreateTonCorrParamExtr( |
| HANDLE_SBR_TON_CORR_EST |
| hTonCorr, /*!< Pointer to handle to SBR_TON_CORR struct. */ |
| INT chan); /*!< Channel index, needed for mem allocation */ |
| |
| INT FDKsbrEnc_InitTonCorrParamExtr( |
| INT frameSize, /*!< Current SBR frame size. */ |
| HANDLE_SBR_TON_CORR_EST |
| hTonCorr, /*!< Pointer to handle to SBR_TON_CORR struct. */ |
| HANDLE_SBR_CONFIG_DATA |
| sbrCfg, /*!< Pointer to SBR configuration parameters. */ |
| INT timeSlots, /*!< Number of time-slots per frame */ |
| INT xposCtrl, /*!< Different patch modes. */ |
| INT ana_max_level, /*!< Maximum level of the adaptive noise. */ |
| INT noiseBands, /*!< Number of noise bands per octave. */ |
| INT noiseFloorOffset, /*!< Noise floor offset. */ |
| UINT useSpeechConfig /*!< Speech or music tuning. */ |
| ); |
| |
| void FDKsbrEnc_DeleteTonCorrParamExtr( |
| HANDLE_SBR_TON_CORR_EST hTonCorr); /*!< Handle to SBR_TON_CORR struct. */ |
| |
| void FDKsbrEnc_CalculateTonalityQuotas( |
| HANDLE_SBR_TON_CORR_EST hTonCorr, FIXP_DBL** sourceBufferReal, |
| FIXP_DBL** sourceBufferImag, INT usb, |
| INT qmfScale /*!< sclefactor of QMF subsamples */ |
| ); |
| |
| INT FDKsbrEnc_ResetTonCorrParamExtr( |
| HANDLE_SBR_TON_CORR_EST hTonCorr, /*!< Handle to SBR_TON_CORR struct. */ |
| INT xposctrl, /*!< Different patch modes. */ |
| INT highBandStartSb, /*!< Start band of the SBR range. */ |
| UCHAR* v_k_master, /*!< Master frequency table from which all other table |
| are derived.*/ |
| INT numMaster, /*!< Number of elements in the master table. */ |
| INT fs, /*!< Sampling frequency (of the SBR part). */ |
| UCHAR** |
| freqBandTable, /*!< Frequency band table for low-res and high-res. */ |
| INT* nSfb, /*!< Number of frequency bands (hig-res and low-res). */ |
| INT noQmfChannels /*!< Number of QMF channels. */ |
| ); |
| #endif |
