diff options
Diffstat (limited to 'fdk-aac/libFDK/include/FDK_decorrelate.h')
| -rw-r--r-- | fdk-aac/libFDK/include/FDK_decorrelate.h | 314 |
1 files changed, 314 insertions, 0 deletions
diff --git a/fdk-aac/libFDK/include/FDK_decorrelate.h b/fdk-aac/libFDK/include/FDK_decorrelate.h new file mode 100644 index 0000000..733aaae --- /dev/null +++ b/fdk-aac/libFDK/include/FDK_decorrelate.h @@ -0,0 +1,314 @@ +/* ----------------------------------------------------------------------------- +Software License for The Fraunhofer FDK AAC Codec Library for Android + +© 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. + +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 +----------------------------------------------------------------------------- */ + +/******************* Library for basic calculation routines ******************** + + Author(s): Markus Lohwasser + + Description: FDK Tools Decorrelator + +*******************************************************************************/ + +#ifndef FDK_DECORRELATE_H +#define FDK_DECORRELATE_H + +#include "common_fix.h" + +#define FIXP_MPS FIXP_DBL + +#ifndef ARCH_PREFER_MULT_32x32 +#define FIXP_DECORR FIXP_SGL +#define FX_DECORR2FX_DBL FX_SGL2FX_DBL +#define FX_DECORR2FX_SGL +#define FX_DBL2FX_DECORR FX_DBL2FX_SGL +#define FX_SGL2FX_DECORR +#define DECORR(a) (FX_DBL2FXCONST_SGL(a)) +#define FL2FXCONST_DECORR FL2FXCONST_SGL +#else +#define FIXP_DECORR FIXP_DBL +#define FX_DECORR2FX_DBL +#define FX_DECORR2FX_SGL FX_DBL2FX_SGL +#define FX_DBL2FX_DECORR +#define FX_SGL2FX_DECORR FX_SGL2FX_DBL +#define DECORR(a) FIXP_DBL(a) +#define FL2FXCONST_DECORR FL2FXCONST_DBL +#endif + +/*--------------- enums -------------------------------*/ + +/** + * Decorrelator types. + */ +typedef enum { + DECORR_MPS, /**< Decorrelator type used by MPS LP/HQ */ + DECORR_PS, /**< Decorrelator type used by HEAACv2 and MPS LP */ + DECORR_USAC, /**< Decorrelator type used by USAC */ + DECORR_LD /**< Decorrelator type used by MPS Low Delay */ +} FDK_DECORR_TYPE; + +/** + * Ducker types. + */ +typedef enum { + DUCKER_AUTOMATIC, /**< FDKdecorrelateInit() chooses correct ducker type + depending on provided parameters. */ + DUCKER_MPS, /**< Force ducker type to MPS. */ + DUCKER_PS /**< Force ducker type to PS. */ +} FDK_DUCKER_TYPE; + +/** + * Reverb band types. + */ +typedef enum { + NOT_EXIST, /**< Mark reverb band as non-existing (number of bands = 0). */ + DELAY, /**< Reverb bands just contains delay elements and no allpass filters. + */ + COMMON_REAL, /**< Real filter coeffs, common filter coeffs within one reverb + band */ + COMMON_CPLX, /**< Complex filter coeffs, common filter coeffs within one + reverb band */ + INDEP_CPLX, /**< Complex filter coeffs, independent filter coeffs for each + hybrid band */ + INDEP_CPLX_PS /**< PS optimized implementation of general INDEP_CPLX type */ +} REVBAND_FILT_TYPE; + +typedef struct DECORR_DEC *HANDLE_DECORR_DEC; + +typedef struct DUCKER_INSTANCE { + int hybridBands; + int parameterBands; + int partiallyComplex; + FDK_DUCKER_TYPE duckerType; + + const UCHAR *qs_next; + const UCHAR *mapProcBands2HybBands; + const UCHAR *mapHybBands2ProcBands; + /* interleaved SmoothDirectNrg[] and SmoothReverbNrg[], + non-interleaved SmoothDirectNrg[] in case of parametric stereo */ + FIXP_MPS SmoothDirRevNrg[2 * (28)]; + + /* + parametric stereo + */ + FIXP_MPS peakDecay[(28)]; + FIXP_MPS peakDiff[(28)]; + FIXP_DBL maxValDirectData; + FIXP_DBL maxValReverbData; + SCHAR scaleDirectNrg; + SCHAR scaleReverbNrg; + SCHAR scaleSmoothDirRevNrg; + SCHAR headroomSmoothDirRevNrg; + +} DUCKER_INSTANCE; + +typedef struct DECORR_FILTER_INSTANCE { + FIXP_MPS *stateCplx; + FIXP_DBL *DelayBufferCplx; + + const FIXP_DECORR *numeratorReal; + const FIXP_STP *coeffsPacked; + const FIXP_DECORR *denominatorReal; +} DECORR_FILTER_INSTANCE; + +typedef struct DECORR_DEC { + INT L_stateBufferCplx; + FIXP_DBL *stateBufferCplx; + INT L_delayBufferCplx; + FIXP_DBL *delayBufferCplx; + + const REVBAND_FILT_TYPE *REV_filtType; + const UCHAR *REV_bandOffset; + const UCHAR *REV_delay; + const SCHAR *REV_filterOrder; + INT reverbBandDelayBufferIndex[(4)]; + UCHAR stateBufferOffset[(3)]; + + DECORR_FILTER_INSTANCE Filter[(71)]; + DUCKER_INSTANCE ducker; + + int numbins; + int partiallyComplex; +} DECORR_DEC; + +/** + * \brief Create one instance of Decorrelator. + * + * \param hDecorrDec A pointer to a decorrelator instance which was + * allocated externally. + * \param bufferCplx Externally allocated buffer (allocate (2*( ( 825 ) + * + ( 373 ) )) FIXP_DBL values). + * \param bufLen Length of bufferCplx. Must be >= (2*( ( 825 ) + ( + * 373 ) )). + * + * \return 0 on success. + */ +INT FDKdecorrelateOpen(HANDLE_DECORR_DEC hDecorrDec, FIXP_DBL *bufferCplx, + const INT bufLen); + +/** + * \brief Initialize and configure Decorrelator instance. + * + * \param hDecorrDec A Decorrelator handle. + * \param nrHybBands Number of (hybrid) bands. + * \param decorrType Decorrelator type to use. + * \param duckerType Ducker type to use (in general use + * DUCKER_AUTOMATIC). + * \param decorrConfig Depending on decorrType values of 0,1,2 are + * allowed. + * \param seed Seed of decorrelator instance. Allowed maximum + * valued depends on decorrType. + * \param partiallyComplex Low power or high quality processing 0: HQ, 1: LQ + * (only allowed for DECORR_MPS | DECORR_PS). + * \param useFractDelay Indicate usage of fractional delay 0: off, 1: on + * (currently not supported). + * \param isLegacyPS Indicate if DECORR_PS is used for HEAACv2 (for all + * other cases: isLegacyPS = 0). The purpose of this parameter is to select the + * correct number of param bands for the ducker. + * \param initStatesFlag Indicates whether the states buffer has to be + * cleared. + * + * \return 0 on success. + */ +INT FDKdecorrelateInit(HANDLE_DECORR_DEC hDecorrDec, const INT nrHybBands, + const FDK_DECORR_TYPE decorrType, + const FDK_DUCKER_TYPE duckerType, const INT decorrConfig, + const INT seed, const INT partiallyComplex, + const INT useFractDelay, const INT isLegacyPS, + const INT initStatesFlag); + +/** + * \brief Apply Decorrelator on input data. + * + * Function applies decorrelator and ducker inplace on hybrid input data. + * Modified hybrid data will be returned inplace. + * + * \param hDecorrDec A decorrelator handle. + * \param dataRealIn In (hybrid) data. + * \param dataImagIn In (hybrid) data. + * \param dataRealOut Out (hybrid) data (can be same as dataRealIn for + * in-place calculation). + * \param dataImagOut Out (hybrid) data (can be same as dataImagIn for + * in-place calculation). + * \param startHybBand Hybrid band to start with decorrelation. + * + * \return 0 on success. + */ +INT FDKdecorrelateApply(HANDLE_DECORR_DEC hDecorrDec, FIXP_DBL *dataRealIn, + FIXP_DBL *dataImagIn, FIXP_DBL *dataRealOut, + FIXP_DBL *dataImagOut, const INT startHybBand); + +/** + * \brief Destroy a Decorrelator instance. + * + * Deallocate whole memory of decorraltor and inside ducker. + * + * \param hDecorrDec Pointer to a decoderrolator handle. Null initialized on + * return. + * + * \return 0 on success. + */ +INT FDKdecorrelateClose(HANDLE_DECORR_DEC hDecorrDec); + +/** + * \brief Get max value address of direct signal. + * + * Get max value address of direct signal needed for ducker energy calculation. + * + * \param hDecorrDec Pointer to a decoderrolator handle. + * + * \return address of max value + */ +FIXP_DBL *getAddrDirectSignalMaxVal(HANDLE_DECORR_DEC hDecorrDec); + +#endif /* FDK_DECORRELATE_H */ |