12228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 22228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project/* ----------------------------------------------------------------------------------------------------------- 32228e360595641dd906bf1773307f43d304f5b2The Android Open Source ProjectSoftware License for The Fraunhofer FDK AAC Codec Library for Android 42228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 52228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project� Copyright 1995 - 2012 Fraunhofer-Gesellschaft zur F�rderung der angewandten Forschung e.V. 62228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project All rights reserved. 72228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 82228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1. INTRODUCTION 92228e360595641dd906bf1773307f43d304f5b2The Android Open Source ProjectThe Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software that implements 102228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectthe MPEG Advanced Audio Coding ("AAC") encoding and decoding scheme for digital audio. 112228e360595641dd906bf1773307f43d304f5b2The Android Open Source ProjectThis FDK AAC Codec software is intended to be used on a wide variety of Android devices. 122228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 132228e360595641dd906bf1773307f43d304f5b2The Android Open Source ProjectAAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient general perceptual 142228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectaudio codecs. AAC-ELD is considered the best-performing full-bandwidth communications codec by 152228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectindependent studies and is widely deployed. AAC has been standardized by ISO and IEC as part 162228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectof the MPEG specifications. 172228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 182228e360595641dd906bf1773307f43d304f5b2The Android Open Source ProjectPatent licenses for necessary patent claims for the FDK AAC Codec (including those of Fraunhofer) 192228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectmay be obtained through Via Licensing (www.vialicensing.com) or through the respective patent owners 202228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectindividually for the purpose of encoding or decoding bit streams in products that are compliant with 212228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectthe ISO/IEC MPEG audio standards. Please note that most manufacturers of Android devices already license 222228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectthese patent claims through Via Licensing or directly from the patent owners, and therefore FDK AAC Codec 232228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectsoftware may already be covered under those patent licenses when it is used for those licensed purposes only. 242228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 252228e360595641dd906bf1773307f43d304f5b2The Android Open Source ProjectCommercially-licensed AAC software libraries, including floating-point versions with enhanced sound quality, 262228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectare also available from Fraunhofer. Users are encouraged to check the Fraunhofer website for additional 272228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectapplications information and documentation. 282228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 292228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project2. COPYRIGHT LICENSE 302228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 312228e360595641dd906bf1773307f43d304f5b2The Android Open Source ProjectRedistribution and use in source and binary forms, with or without modification, are permitted without 322228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectpayment of copyright license fees provided that you satisfy the following conditions: 332228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 342228e360595641dd906bf1773307f43d304f5b2The Android Open Source ProjectYou must retain the complete text of this software license in redistributions of the FDK AAC Codec or 352228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectyour modifications thereto in source code form. 362228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 372228e360595641dd906bf1773307f43d304f5b2The Android Open Source ProjectYou must retain the complete text of this software license in the documentation and/or other materials 382228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectprovided with redistributions of the FDK AAC Codec or your modifications thereto in binary form. 392228e360595641dd906bf1773307f43d304f5b2The Android Open Source ProjectYou must make available free of charge copies of the complete source code of the FDK AAC Codec and your 402228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectmodifications thereto to recipients of copies in binary form. 412228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 422228e360595641dd906bf1773307f43d304f5b2The Android Open Source ProjectThe name of Fraunhofer may not be used to endorse or promote products derived from this library without 432228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectprior written permission. 442228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 452228e360595641dd906bf1773307f43d304f5b2The Android Open Source ProjectYou may not charge copyright license fees for anyone to use, copy or distribute the FDK AAC Codec 462228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectsoftware or your modifications thereto. 472228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 482228e360595641dd906bf1773307f43d304f5b2The Android Open Source ProjectYour modified versions of the FDK AAC Codec must carry prominent notices stating that you changed the software 492228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectand the date of any change. For modified versions of the FDK AAC Codec, the term 502228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project"Fraunhofer FDK AAC Codec Library for Android" must be replaced by the term 512228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project"Third-Party Modified Version of the Fraunhofer FDK AAC Codec Library for Android." 522228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 532228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project3. NO PATENT LICENSE 542228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 552228e360595641dd906bf1773307f43d304f5b2The Android Open Source ProjectNO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without limitation the patents of Fraunhofer, 562228e360595641dd906bf1773307f43d304f5b2The Android Open Source ProjectARE GRANTED BY THIS SOFTWARE LICENSE. Fraunhofer provides no warranty of patent non-infringement with 572228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectrespect to this software. 582228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 592228e360595641dd906bf1773307f43d304f5b2The Android Open Source ProjectYou may use this FDK AAC Codec software or modifications thereto only for purposes that are authorized 602228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectby appropriate patent licenses. 612228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 622228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project4. DISCLAIMER 632228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 642228e360595641dd906bf1773307f43d304f5b2The Android Open Source ProjectThis FDK AAC Codec software is provided by Fraunhofer on behalf of the copyright holders and contributors 652228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project"AS IS" and WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, including but not limited to the implied warranties 662228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectof merchantability and fitness for a particular purpose. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR 672228e360595641dd906bf1773307f43d304f5b2The Android Open Source ProjectCONTRIBUTORS BE LIABLE for any direct, indirect, incidental, special, exemplary, or consequential damages, 682228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectincluding but not limited to procurement of substitute goods or services; loss of use, data, or profits, 692228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projector business interruption, however caused and on any theory of liability, whether in contract, strict 702228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectliability, or tort (including negligence), arising in any way out of the use of this software, even if 712228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectadvised of the possibility of such damage. 722228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 732228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project5. CONTACT INFORMATION 742228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 752228e360595641dd906bf1773307f43d304f5b2The Android Open Source ProjectFraunhofer Institute for Integrated Circuits IIS 762228e360595641dd906bf1773307f43d304f5b2The Android Open Source ProjectAttention: Audio and Multimedia Departments - FDK AAC LL 772228e360595641dd906bf1773307f43d304f5b2The Android Open Source ProjectAm Wolfsmantel 33 782228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project91058 Erlangen, Germany 792228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 802228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectwww.iis.fraunhofer.de/amm 812228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectamm-info@iis.fraunhofer.de 822228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project----------------------------------------------------------------------------------------------------------- */ 832228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 842228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project/******************************** MPEG Audio Encoder ************************** 852228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 862228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project Initial author: Alex Groeschel 872228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project contents/description: Temporal noise shaping 882228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 892228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project******************************************************************************/ 902228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 912228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project#ifndef _TNS_H 922228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project#define _TNS_H 932228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 942228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project#include "common_fix.h" 952228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 962228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project#include "psy_const.h" 972228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 982228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 992228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project#ifndef PI 1002228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project#define PI 3.1415926535897931f 1012228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project#endif 1022228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1032228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project/** 1042228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project * TNS_ENABLE_MASK 1052228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project * This bitfield defines which TNS features are enabled 1062228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project * The TNS mask is composed of 4 bits. 1072228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project * tnsMask |= 0x1; activate TNS short blocks 1082228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project * tnsMask |= 0x2; activate TNS for long blocks 1092228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project * tnsMask |= 0x4; activate TNS PEAK tool for short blocks 1102228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project * tnsMask |= 0x8; activate TNS PEAK tool for long blocks 1112228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project */ 1122228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project#define TNS_ENABLE_MASK 0xf 1132228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1142228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project/* TNS max filter order for Low Complexity MPEG4 profile */ 1152228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project#define TNS_MAX_ORDER 12 1162228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1172228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1182228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project#define MAX_NUM_OF_FILTERS 2 1192228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1202228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1212228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projecttypedef struct{ /*stuff that is tabulated dependent on bitrate etc. */ 1222228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project INT filterEnabled[MAX_NUM_OF_FILTERS]; 1232228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project INT threshOn[MAX_NUM_OF_FILTERS]; /* min. prediction gain for using tns TABUL*/ 1242228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project INT tnsLimitOrder[MAX_NUM_OF_FILTERS]; /* Limit for TNS order TABUL*/ 1252228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project INT tnsFilterDirection[MAX_NUM_OF_FILTERS]; /* Filtering direction, 0=up, 1=down TABUL */ 1262228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project INT acfSplit[MAX_NUM_OF_FILTERS]; 1272228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project INT seperateFiltersAllowed; 1282228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1292228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project}TNS_CONFIG_TABULATED; 1302228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1312228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1322228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1332228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projecttypedef struct { /*assigned at InitTime*/ 1342228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project TNS_CONFIG_TABULATED confTab; 1352228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project INT tnsActive; 1362228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project INT maxOrder; /* max. order of tns filter */ 1372228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project INT coefRes; 1382228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project FIXP_DBL acfWindow[MAX_NUM_OF_FILTERS][TNS_MAX_ORDER+3+1]; 1392228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* now some things that only probably can be done at Init time; 1402228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project could be they have to be split up for each individual (short) window or 1412228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project even filter. */ 1422228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project INT lpcStartBand[MAX_NUM_OF_FILTERS]; 1432228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project INT lpcStartLine[MAX_NUM_OF_FILTERS]; 1442228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project INT lpcStopBand; 1452228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project INT lpcStopLine; 1462228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1472228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project}TNS_CONFIG; 1482228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1492228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1502228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projecttypedef struct { 1512228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project INT tnsActive; 1522228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project INT predictionGain; 1532228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project} TNS_SUBBLOCK_INFO; 1542228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1552228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projecttypedef struct{ /*changed at runTime*/ 1562228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project TNS_SUBBLOCK_INFO subBlockInfo[TRANS_FAC]; 1572228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project FIXP_DBL ratioMultTable[TRANS_FAC][MAX_SFB_SHORT]; 1582228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project} TNS_DATA_SHORT; 1592228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1602228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projecttypedef struct{ /*changed at runTime*/ 1612228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project TNS_SUBBLOCK_INFO subBlockInfo; 1622228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project FIXP_DBL ratioMultTable[MAX_SFB_LONG]; 1632228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project} TNS_DATA_LONG; 1642228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1652228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project/* can be implemented as union */ 1662228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projecttypedef shouldBeUnion{ 1672228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project TNS_DATA_LONG Long; 1682228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project TNS_DATA_SHORT Short; 1692228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project}TNS_DATA_RAW; 1702228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1712228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projecttypedef struct{ 1722228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project INT numOfSubblocks; 1732228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project TNS_DATA_RAW dataRaw; 1742228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project INT tnsMaxScaleSpec; 1752228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project INT filtersMerged; 1762228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project}TNS_DATA; 1772228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1782228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projecttypedef struct{ 1792228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project INT numOfFilters[TRANS_FAC]; 1802228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project INT coefRes[TRANS_FAC]; 1812228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project INT length[TRANS_FAC][MAX_NUM_OF_FILTERS]; 1822228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project INT order[TRANS_FAC][MAX_NUM_OF_FILTERS]; 1832228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project INT direction[TRANS_FAC][MAX_NUM_OF_FILTERS]; 1842228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project INT coefCompress[TRANS_FAC][MAX_NUM_OF_FILTERS]; 1852228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* for Long: length TNS_MAX_ORDER (12 for LC) is required -> 12 */ 1862228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* for Short: length TRANS_FAC*TNS_MAX_ORDER (only 5 for short LC) is required -> 8*5=40 */ 1872228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* Currently TRANS_FAC*TNS_MAX_ORDER = 8*12 = 96 (for LC) is used (per channel)! Memory could be saved here! */ 1882228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project INT coef[TRANS_FAC][MAX_NUM_OF_FILTERS][TNS_MAX_ORDER]; 1892228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project}TNS_INFO; 1902228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1912228e360595641dd906bf1773307f43d304f5b2The Android Open Source ProjectINT FDKaacEnc_FreqToBandWithRounding( 1922228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project const INT freq, 1932228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project const INT fs, 1942228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project const INT numOfBands, 1952228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project const INT *bandStartOffset 1962228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project ); 1972228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1982228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project#endif /* _TNS_H */ 199