| /* ----------------------------------------------------------------------------- |
| 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 |
| ----------------------------------------------------------------------------- */ |
| |
| /**************************** AAC decoder library ****************************** |
| |
| Author(s): Christian Griebel |
| |
| Description: Error concealment structs and types |
| |
| *******************************************************************************/ |
| |
| #ifndef CONCEAL_TYPES_H |
| #define CONCEAL_TYPES_H |
| |
| #include "machine_type.h" |
| #include "common_fix.h" |
| |
| #include "rvlc_info.h" |
| |
| #include "usacdec_lpc.h" |
| |
| #define CONCEAL_MAX_NUM_FADE_FACTORS (32) |
| |
| #define FIXP_CNCL FIXP_DBL |
| #define FL2FXCONST_CNCL FL2FXCONST_DBL |
| #define FX_DBL2FX_CNCL |
| #define FX_CNCL2FX_DBL |
| #define CNCL_FRACT_BITS DFRACT_BITS |
| |
| /* Warning: Do not ever change these values. */ |
| typedef enum { |
| ConcealMethodNone = -1, |
| ConcealMethodMute = 0, |
| ConcealMethodNoise = 1, |
| ConcealMethodInter = 2, |
| ConcealMethodTonal = 3 |
| |
| } CConcealmentMethod; |
| |
| typedef enum { |
| ConcealState_Ok, |
| ConcealState_Single, |
| ConcealState_FadeIn, |
| ConcealState_Mute, |
| ConcealState_FadeOut |
| |
| } CConcealmentState; |
| |
| typedef struct { |
| FIXP_SGL fadeOutFactor[CONCEAL_MAX_NUM_FADE_FACTORS]; |
| FIXP_SGL fadeInFactor[CONCEAL_MAX_NUM_FADE_FACTORS]; |
| |
| CConcealmentMethod method; |
| |
| int numFadeOutFrames; |
| int numFadeInFrames; |
| int numMuteReleaseFrames; |
| FIXP_DBL comfortNoiseLevel; |
| |
| } CConcealParams; |
| |
| typedef enum { |
| FADE_TIMEDOMAIN_TOSPECTRALMUTE = 1, |
| FADE_TIMEDOMAIN_FROMSPECTRALMUTE, |
| FADE_TIMEDOMAIN |
| } TDfadingType; |
| |
| typedef struct { |
| CConcealParams *pConcealParams; |
| |
| FIXP_CNCL spectralCoefficient[1024]; |
| SHORT specScale[8]; |
| |
| INT iRandomPhase; |
| INT prevFrameOk[2]; |
| INT cntValidFrames; |
| INT cntFadeFrames; /* State for signal fade-in/out */ |
| /* States for signal fade-out of frames with more than one window/subframe - |
| [0] used by Update CntFadeFrames mode of CConcealment_ApplyFadeOut, [1] used |
| by FadeOut mode */ |
| int winGrpOffset[2]; /* State for signal fade-out of frames with more than one |
| window/subframe */ |
| int attGrpOffset[2]; /* State for faster signal fade-out of frames with |
| transient signal parts */ |
| |
| SCHAR lastRenderMode; |
| |
| UCHAR windowShape; |
| BLOCK_TYPE windowSequence; |
| UCHAR lastWinGrpLen; |
| |
| CConcealmentState concealState; |
| CConcealmentState concealState_old; |
| FIXP_DBL fade_old; /* last fading factor */ |
| TDfadingType lastFadingType; /* last fading type */ |
| |
| SHORT aRvlcPreviousScaleFactor[RVLC_MAX_SFB]; /* needed once per channel */ |
| UCHAR aRvlcPreviousCodebook[RVLC_MAX_SFB]; /* needed once per channel */ |
| SCHAR rvlcPreviousScaleFactorOK; |
| SCHAR rvlcPreviousBlockType; |
| |
| FIXP_LPC lsf4[M_LP_FILTER_ORDER]; |
| FIXP_DBL last_tcx_gain; |
| INT last_tcx_gain_e; |
| ULONG TDNoiseSeed; |
| FIXP_PCM TDNoiseStates[3]; |
| FIXP_SGL TDNoiseCoef[3]; |
| FIXP_SGL TDNoiseAtt; |
| |
| } CConcealmentInfo; |
| |
| #endif /* #ifndef CONCEAL_TYPES_H */ |