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Diffstat (limited to 'libSBRenc/src/nf_est.h')
| -rw-r--r-- | libSBRenc/src/nf_est.h | 244 |
1 files changed, 141 insertions, 103 deletions
diff --git a/libSBRenc/src/nf_est.h b/libSBRenc/src/nf_est.h index f26f74f..c2f16e9 100644 --- a/libSBRenc/src/nf_est.h +++ b/libSBRenc/src/nf_est.h @@ -1,74 +1,85 @@ - -/* ----------------------------------------------------------------------------------------------------------- +/* ----------------------------------------------------------------------------- Software License for The Fraunhofer FDK AAC Codec Library for Android -© Copyright 1995 - 2015 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. - All rights reserved. +© 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. +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: +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 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 +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. +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. +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." +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. +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. +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. +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 @@ -79,69 +90,96 @@ Am Wolfsmantel 33 www.iis.fraunhofer.de/amm amm-info@iis.fraunhofer.de ------------------------------------------------------------------------------------------------------------ */ +----------------------------------------------------------------------------- */ + +/**************************** SBR encoder library ****************************** + + Author(s): + + Description: + +*******************************************************************************/ /*! \file - \brief Noise floor estimation structs and prototypes + \brief Noise floor estimation structs and prototypes $Revision: 92790 $ */ -#ifndef __NF_EST_H -#define __NF_EST_H +#ifndef NF_EST_H +#define NF_EST_H #include "sbr_encoder.h" #include "fram_gen.h" -#define NF_SMOOTHING_LENGTH 4 /*!< Smoothing length of the noise floors. */ - -typedef struct -{ - FIXP_DBL prevNoiseLevels[NF_SMOOTHING_LENGTH][MAX_NUM_NOISE_VALUES]; /*!< The previous noise levels. */ - FIXP_DBL noiseFloorOffset[MAX_NUM_NOISE_VALUES]; /*!< Noise floor offset, scaled with NOISE_FLOOR_OFFSET_SCALING */ - const FIXP_DBL *smoothFilter; /*!< Smoothing filter to use. */ - FIXP_DBL ana_max_level; /*!< Max level allowed. */ - FIXP_DBL weightFac; /*!< Weightening factor for the difference between orig and sbr. */ - INT freqBandTableQmf[MAX_NUM_NOISE_VALUES + 1]; /*!< Frequncy band table for the noise floor bands.*/ - INT noNoiseBands; /*!< Number of noisebands. */ - INT noiseBands; /*!< NoiseBands switch 4 bit.*/ - INT timeSlots; /*!< Number of timeslots in a frame. */ - INVF_MODE diffThres; /*!< Threshold value to control the inverse filtering decision */ -} -SBR_NOISE_FLOOR_ESTIMATE; +#define NF_SMOOTHING_LENGTH 4 /*!< Smoothing length of the noise floors. */ + +typedef struct { + FIXP_DBL + prevNoiseLevels[NF_SMOOTHING_LENGTH] + [MAX_NUM_NOISE_VALUES]; /*!< The previous noise levels. */ + FIXP_DBL noiseFloorOffset + [MAX_NUM_NOISE_VALUES]; /*!< Noise floor offset, scaled with + NOISE_FLOOR_OFFSET_SCALING */ + const FIXP_DBL *smoothFilter; /*!< Smoothing filter to use. */ + FIXP_DBL ana_max_level; /*!< Max level allowed. */ + FIXP_DBL weightFac; /*!< Weightening factor for the difference between orig + and sbr. */ + INT freqBandTableQmf[MAX_NUM_NOISE_VALUES + + 1]; /*!< Frequncy band table for the noise floor bands.*/ + INT noNoiseBands; /*!< Number of noisebands. */ + INT noiseBands; /*!< NoiseBands switch 4 bit.*/ + INT timeSlots; /*!< Number of timeslots in a frame. */ + INVF_MODE diffThres; /*!< Threshold value to control the inverse filtering + decision */ +} SBR_NOISE_FLOOR_ESTIMATE; typedef SBR_NOISE_FLOOR_ESTIMATE *HANDLE_SBR_NOISE_FLOOR_ESTIMATE; -void -FDKsbrEnc_sbrNoiseFloorEstimateQmf(HANDLE_SBR_NOISE_FLOOR_ESTIMATE h_sbrNoiseFloorEstimate, /*!< Handle to SBR_NOISE_FLOOR_ESTIMATE struct */ - const SBR_FRAME_INFO *frame_info, /*!< Time frequency grid of the current frame. */ - FIXP_DBL *noiseLevels, /*!< Pointer to vector to store the noise levels in.*/ - FIXP_DBL **quotaMatrixOrig, /*!< Matrix holding the quota values of the original. */ - SCHAR* indexVector, /*!< Index vector to obtain the patched data. */ - INT missingHarmonicsFlag, /*!< Flag indicating if a strong tonal component will be missing. */ - INT startIndex, /*!< Start index. */ - UINT numberOfEstimatesPerFrame, /*!< The number of tonality estimates per frame. */ - INT transientFrame, /*!< A flag indicating if a transient is present. */ - INVF_MODE* pInvFiltLevels, /*!< Pointer to the vector holding the inverse filtering levels. */ - UINT sbrSyntaxFlags - ); - -INT -FDKsbrEnc_InitSbrNoiseFloorEstimate (HANDLE_SBR_NOISE_FLOOR_ESTIMATE h_sbrNoiseFloorEstimate, /*!< Handle to SBR_NOISE_FLOOR_ESTIMATE struct */ - INT ana_max_level, /*!< Maximum level of the adaptive noise. */ - const UCHAR *freqBandTable, /*!< Frequany band table. */ - INT nSfb, /*!< Number of frequency bands. */ - INT noiseBands, /*!< Number of noise bands per octave. */ - INT noiseFloorOffset, /*!< Noise floor offset. */ - INT timeSlots, /*!< Number of time slots in a frame. */ - UINT useSpeechConfig /*!< Flag: adapt tuning parameters according to speech */ - ); - -INT -FDKsbrEnc_resetSbrNoiseFloorEstimate (HANDLE_SBR_NOISE_FLOOR_ESTIMATE h_sbrNoiseFloorEstimate, /*!< Handle to SBR_NOISE_FLOOR_ESTIMATE struct */ - const UCHAR *freqBandTable, /*!< Frequany band table. */ - INT nSfb); /*!< Number of bands in the frequency band table. */ - -void -FDKsbrEnc_deleteSbrNoiseFloorEstimate (HANDLE_SBR_NOISE_FLOOR_ESTIMATE h_sbrNoiseFloorEstimate); /*!< Handle to SBR_NOISE_FLOOR_ESTIMATE struct */ +void FDKsbrEnc_sbrNoiseFloorEstimateQmf( + HANDLE_SBR_NOISE_FLOOR_ESTIMATE + h_sbrNoiseFloorEstimate, /*!< Handle to SBR_NOISE_FLOOR_ESTIMATE struct + */ + const SBR_FRAME_INFO + *frame_info, /*!< Time frequency grid of the current frame. */ + FIXP_DBL + *noiseLevels, /*!< Pointer to vector to store the noise levels in.*/ + FIXP_DBL **quotaMatrixOrig, /*!< Matrix holding the quota values of the + original. */ + SCHAR *indexVector, /*!< Index vector to obtain the patched data. */ + INT missingHarmonicsFlag, /*!< Flag indicating if a strong tonal component + will be missing. */ + INT startIndex, /*!< Start index. */ + UINT numberOfEstimatesPerFrame, /*!< The number of tonality estimates per + frame. */ + INT transientFrame, /*!< A flag indicating if a transient is present. */ + INVF_MODE *pInvFiltLevels, /*!< Pointer to the vector holding the inverse + filtering levels. */ + UINT sbrSyntaxFlags); + +INT FDKsbrEnc_InitSbrNoiseFloorEstimate( + HANDLE_SBR_NOISE_FLOOR_ESTIMATE + h_sbrNoiseFloorEstimate, /*!< Handle to SBR_NOISE_FLOOR_ESTIMATE struct + */ + INT ana_max_level, /*!< Maximum level of the adaptive noise. */ + const UCHAR *freqBandTable, /*!< Frequany band table. */ + INT nSfb, /*!< Number of frequency bands. */ + INT noiseBands, /*!< Number of noise bands per octave. */ + INT noiseFloorOffset, /*!< Noise floor offset. */ + INT timeSlots, /*!< Number of time slots in a frame. */ + UINT useSpeechConfig /*!< Flag: adapt tuning parameters according to speech + */ +); + +INT FDKsbrEnc_resetSbrNoiseFloorEstimate( + HANDLE_SBR_NOISE_FLOOR_ESTIMATE + h_sbrNoiseFloorEstimate, /*!< Handle to SBR_NOISE_FLOOR_ESTIMATE struct + */ + const UCHAR *freqBandTable, /*!< Frequany band table. */ + INT nSfb); /*!< Number of bands in the frequency band table. */ + +void FDKsbrEnc_deleteSbrNoiseFloorEstimate( + HANDLE_SBR_NOISE_FLOOR_ESTIMATE + h_sbrNoiseFloorEstimate); /*!< Handle to SBR_NOISE_FLOOR_ESTIMATE struct + */ #endif |