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diff --git a/libSBRenc/src/mh_det.h b/libSBRenc/src/mh_det.h new file mode 100644 index 0000000..ac62532 --- /dev/null +++ b/libSBRenc/src/mh_det.h @@ -0,0 +1,196 @@ + +/* ----------------------------------------------------------------------------------------------------------- +Software License for The Fraunhofer FDK AAC Codec Library for Android + +© Copyright 1995 - 2012 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 +----------------------------------------------------------------------------------------------------------- */ + +/*! + \file + \brief missing harmonics detection header file +*/ + +#ifndef __MH_DETECT_H +#define __MH_DETECT_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 |