| |
| /* ----------------------------------------------------------------------------------------------------------- |
| 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 General tonality correction detector module. |
| */ |
| #ifndef _TON_CORR_EST_H |
| #define _TON_CORR_EST_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.*/ |
| INT 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[QMF_CHANNELS]; /*!< Vector holding the averaged energies for every QMF channel */ |
| |
| SCHAR indexVector[QMF_CHANNELS]; /*!< 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 |
| |
