| /* ----------------------------------------------------------------------------- |
| 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 missing harmonics detection header file $Revision: 92790 $ |
| */ |
| |
| #ifndef MH_DET_H |
| #define MH_DET_H |
| |
| #include "sbr_encoder.h" |
| #include "fram_gen.h" |
| |
| typedef struct { |
| FIXP_DBL thresHoldDiff; /*!< threshold for tonality difference */ |
| FIXP_DBL thresHoldDiffGuide; /*!< threshold for tonality difference for the |
| guide */ |
| FIXP_DBL thresHoldTone; /*!< threshold for tonality for a sine */ |
| FIXP_DBL invThresHoldTone; |
| FIXP_DBL thresHoldToneGuide; /*!< threshold for tonality for a sine for the |
| guide */ |
| FIXP_DBL sfmThresSbr; /*!< tonality flatness measure threshold for the SBR |
| signal.*/ |
| FIXP_DBL sfmThresOrig; /*!< tonality flatness measure threshold for the |
| original signal.*/ |
| FIXP_DBL decayGuideOrig; /*!< decay value of the tonality value of the guide |
| for the tone. */ |
| FIXP_DBL decayGuideDiff; /*!< decay value of the tonality value of the guide |
| for the tonality difference. */ |
| FIXP_DBL derivThresMaxLD64; /*!< threshold for detecting LP character in a |
| signal. */ |
| FIXP_DBL derivThresBelowLD64; /*!< threshold for detecting LP character in a |
| signal. */ |
| FIXP_DBL derivThresAboveLD64; /*!< threshold for detecting LP character in a |
| signal. */ |
| } THRES_HOLDS; |
| |
| typedef struct { |
| INT deltaTime; /*!< maximum allowed transient distance (from frame border in |
| number of qmf subband sample) for a frame to be considered a |
| transient frame.*/ |
| THRES_HOLDS thresHolds; /*!< the thresholds used for detection. */ |
| INT maxComp; /*!< maximum alllowed compensation factor for the envelope data. |
| */ |
| } DETECTOR_PARAMETERS_MH; |
| |
| typedef struct { |
| FIXP_DBL *guideVectorDiff; |
| FIXP_DBL *guideVectorOrig; |
| UCHAR *guideVectorDetected; |
| } GUIDE_VECTORS; |
| |
| typedef struct { |
| INT qmfNoChannels; |
| INT nSfb; |
| INT sampleFreq; |
| INT previousTransientFlag; |
| INT previousTransientFrame; |
| INT previousTransientPos; |
| |
| INT noVecPerFrame; |
| INT transientPosOffset; |
| |
| INT move; |
| INT totNoEst; |
| INT noEstPerFrame; |
| INT timeSlots; |
| |
| UCHAR *guideScfb; |
| UCHAR *prevEnvelopeCompensation; |
| UCHAR *detectionVectors[MAX_NO_OF_ESTIMATES]; |
| FIXP_DBL tonalityDiff[MAX_NO_OF_ESTIMATES / 2][MAX_FREQ_COEFFS]; |
| FIXP_DBL sfmOrig[MAX_NO_OF_ESTIMATES / 2][MAX_FREQ_COEFFS]; |
| FIXP_DBL sfmSbr[MAX_NO_OF_ESTIMATES / 2][MAX_FREQ_COEFFS]; |
| const DETECTOR_PARAMETERS_MH *mhParams; |
| GUIDE_VECTORS guideVectors[MAX_NO_OF_ESTIMATES]; |
| } SBR_MISSING_HARMONICS_DETECTOR; |
| |
| typedef SBR_MISSING_HARMONICS_DETECTOR *HANDLE_SBR_MISSING_HARMONICS_DETECTOR; |
| |
| void FDKsbrEnc_SbrMissingHarmonicsDetectorQmf( |
| HANDLE_SBR_MISSING_HARMONICS_DETECTOR h_sbrMissingHarmonicsDetector, |
| FIXP_DBL **pQuotaBuffer, INT **pSignBuffer, SCHAR *indexVector, |
| const SBR_FRAME_INFO *pFrameInfo, const UCHAR *pTranInfo, |
| INT *pAddHarmonicsFlag, UCHAR *pAddHarmonicsScaleFactorBands, |
| const UCHAR *freqBandTable, INT nSfb, UCHAR *envelopeCompensation, |
| FIXP_DBL *pNrgVector); |
| |
| INT FDKsbrEnc_CreateSbrMissingHarmonicsDetector( |
| HANDLE_SBR_MISSING_HARMONICS_DETECTOR hSbrMHDet, INT chan); |
| |
| INT FDKsbrEnc_InitSbrMissingHarmonicsDetector( |
| HANDLE_SBR_MISSING_HARMONICS_DETECTOR h_sbrMissingHarmonicsDetector, |
| INT sampleFreq, INT frameSize, INT nSfb, INT qmfNoChannels, INT totNoEst, |
| INT move, INT noEstPerFrame, UINT sbrSyntaxFlags); |
| |
| void FDKsbrEnc_DeleteSbrMissingHarmonicsDetector( |
| HANDLE_SBR_MISSING_HARMONICS_DETECTOR h_sbrMissingHarmonicsDetector); |
| |
| INT FDKsbrEnc_ResetSbrMissingHarmonicsDetector( |
| HANDLE_SBR_MISSING_HARMONICS_DETECTOR hSbrMissingHarmonicsDetector, |
| INT nSfb); |
| |
| #endif |
