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-
-/* -----------------------------------------------------------------------------------------------------------
-Software License for The Fraunhofer FDK AAC Codec Library for Android
-
-© Copyright 1995 - 2013 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 Low Power Profile Transposer,
-*/
-
-#ifndef _LPP_TRANS_H
-#define _LPP_TRANS_H
-
-#include "sbrdecoder.h"
-#include "qmf.h"
-
-/*
- Common
-*/
-#define QMF_OUT_SCALE 8
-
-/*
- Env-Adjust
-*/
-#define MAX_NOISE_ENVELOPES 2
-#define MAX_NOISE_COEFFS 5
-#define MAX_NUM_NOISE_VALUES (MAX_NOISE_ENVELOPES * MAX_NOISE_COEFFS)
-#define MAX_NUM_LIMITERS 12
-
-/* Set MAX_ENVELOPES to the largest value of all supported BSFORMATs
- by overriding MAX_ENVELOPES in the correct order: */
-#define MAX_ENVELOPES_HEAAC 5
-#define MAX_ENVELOPES MAX_ENVELOPES_HEAAC
-
-#define MAX_FREQ_COEFFS 48
-#define MAX_FREQ_COEFFS_FS44100 35
-#define MAX_FREQ_COEFFS_FS48000 32
-
-
-#define MAX_NUM_ENVELOPE_VALUES (MAX_ENVELOPES * MAX_FREQ_COEFFS)
-
-#define MAX_GAIN_EXP 34
-/* Maximum gain will be sqrt(0.5 * 2^MAX_GAIN_EXP)
- example: 34=99dB */
-#define MAX_GAIN_CONCEAL_EXP 1
-/* Maximum gain will be sqrt(0.5 * 2^MAX_GAIN_CONCEAL_EXP) in concealment case (0dB) */
-
-/*
- LPP Transposer
-*/
-#define LPC_ORDER 2
-
-#define MAX_INVF_BANDS MAX_NOISE_COEFFS
-
-#define MAX_NUM_PATCHES 6
-#define SHIFT_START_SB 1 /*!< lowest subband of source range */
-
-typedef enum
-{
- INVF_OFF = 0,
- INVF_LOW_LEVEL,
- INVF_MID_LEVEL,
- INVF_HIGH_LEVEL,
- INVF_SWITCHED /* not a real choice but used here to control behaviour */
-}
-INVF_MODE;
-
-
-/** parameter set for one single patch */
-typedef struct {
- UCHAR sourceStartBand; /*!< first band in lowbands where to take the samples from */
- UCHAR sourceStopBand; /*!< first band in lowbands which is not included in the patch anymore */
- UCHAR guardStartBand; /*!< first band in highbands to be filled with zeros in order to
- reduce interferences between patches */
- UCHAR targetStartBand; /*!< first band in highbands to be filled with whitened lowband signal */
- UCHAR targetBandOffs; /*!< difference between 'startTargetBand' and 'startSourceBand' */
- UCHAR numBandsInPatch; /*!< number of consecutive bands in this one patch */
-} PATCH_PARAM;
-
-
-/** whitening factors for different levels of whitening
- need to be initialized corresponding to crossover frequency */
-typedef struct {
- FIXP_DBL off; /*!< bw factor for signal OFF */
- FIXP_DBL transitionLevel;
- FIXP_DBL lowLevel; /*!< bw factor for signal LOW_LEVEL */
- FIXP_DBL midLevel; /*!< bw factor for signal MID_LEVEL */
- FIXP_DBL highLevel; /*!< bw factor for signal HIGH_LEVEL */
-} WHITENING_FACTORS;
-
-
-/*! The transposer settings are calculated on a header reset and are shared by both channels. */
-typedef struct {
- UCHAR nCols; /*!< number subsamples of a codec frame */
- UCHAR noOfPatches; /*!< number of patches */
- UCHAR lbStartPatching; /*!< first band of lowbands that will be patched */
- UCHAR lbStopPatching; /*!< first band that won't be patched anymore*/
- UCHAR bwBorders[MAX_NUM_NOISE_VALUES]; /*!< spectral bands with different inverse filtering levels */
-
- PATCH_PARAM patchParam[MAX_NUM_PATCHES]; /*!< new parameter set for patching */
- WHITENING_FACTORS whFactors; /*!< the pole moving factors for certain whitening levels as indicated
- in the bitstream depending on the crossover frequency */
- UCHAR overlap; /*!< Overlap size */
-} TRANSPOSER_SETTINGS;
-
-
-typedef struct
-{
- TRANSPOSER_SETTINGS *pSettings; /*!< Common settings for both channels */
- FIXP_DBL bwVectorOld[MAX_NUM_PATCHES]; /*!< pole moving factors of past frame */
- FIXP_DBL lpcFilterStatesReal[LPC_ORDER][(32)]; /*!< pointer array to save filter states */
- FIXP_DBL lpcFilterStatesImag[LPC_ORDER][(32)]; /*!< pointer array to save filter states */
-}
-SBR_LPP_TRANS;
-
-typedef SBR_LPP_TRANS *HANDLE_SBR_LPP_TRANS;
-
-
-void lppTransposer (HANDLE_SBR_LPP_TRANS hLppTrans,
- QMF_SCALE_FACTOR *sbrScaleFactor,
- FIXP_DBL **qmfBufferReal,
-
- FIXP_DBL *degreeAlias,
- FIXP_DBL **qmfBufferImag,
- const int useLP,
- const int timeStep,
- const int firstSlotOffset,
- const int lastSlotOffset,
- const int nInvfBands,
- INVF_MODE *sbr_invf_mode,
- INVF_MODE *sbr_invf_mode_prev
- );
-
-
-SBR_ERROR
-createLppTransposer (HANDLE_SBR_LPP_TRANS hLppTrans,
- TRANSPOSER_SETTINGS *pSettings,
- const int highBandStartSb,
- UCHAR *v_k_master,
- const int numMaster,
- const int usb,
- const int timeSlots,
- const int nCols,
- UCHAR *noiseBandTable,
- const int noNoiseBands,
- UINT fs,
- const int chan,
- const int overlap);
-
-
-SBR_ERROR
-resetLppTransposer (HANDLE_SBR_LPP_TRANS hLppTrans,
- UCHAR highBandStartSb,
- UCHAR *v_k_master,
- UCHAR numMaster,
- UCHAR *noiseBandTable,
- UCHAR noNoiseBands,
- UCHAR usb,
- UINT fs);
-
-
-
-#endif /* _LPP_TRANS_H */
-