| |
| /* ----------------------------------------------------------------------------------------------------------- |
| 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 |
