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 54f0d97057c5c640b25518358886f8c47da9fc052Jean-Michel Trivi� Copyright 1995 - 2013 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-4 AAC Encoder ************************** 852228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 867ad97579f8ccb843afdb5b184c4b209253839fe3Jean-Michel Trivi Author(s): M. Werner, Tobias Chalupka 872228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project Description: Block switching 882228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 892228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project******************************************************************************/ 902228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 912228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project/****************** Includes *****************************/ 922228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 932228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project#include "block_switch.h" 942228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project#include "genericStds.h" 952228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 962228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 972228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project#define LOWOV_WINDOW _LOWOV_WINDOW 982228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 992228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project/**************** internal function prototypes ***********/ 1002228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1012228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectstatic FIXP_DBL FDKaacEnc_GetWindowEnergy(const FIXP_DBL in[], const INT blSwWndIdx); 1022228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1037ad97579f8ccb843afdb5b184c4b209253839fe3Jean-Michel Trivistatic void FDKaacEnc_CalcWindowEnergy( 1047ad97579f8ccb843afdb5b184c4b209253839fe3Jean-Michel Trivi BLOCK_SWITCHING_CONTROL *RESTRICT blockSwitchingControl, 1057ad97579f8ccb843afdb5b184c4b209253839fe3Jean-Michel Trivi INT windowLen, 1067ad97579f8ccb843afdb5b184c4b209253839fe3Jean-Michel Trivi const INT_PCM *pTimeSignal 1077ad97579f8ccb843afdb5b184c4b209253839fe3Jean-Michel Trivi ); 1082228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1092228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project/****************** Constants *****************************/ 1102228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project/* LONG START SHORT STOP LOWOV */ 1112228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectstatic const INT blockType2windowShape[2][5] = { {SINE_WINDOW, KBD_WINDOW, WRONG_WINDOW, SINE_WINDOW, KBD_WINDOW}, /* LD */ 1122228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project {KBD_WINDOW, SINE_WINDOW, SINE_WINDOW, KBD_WINDOW, WRONG_WINDOW} }; /* LC */ 1132228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1142228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project/* IIR high pass coeffs */ 1152228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1162228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project#ifndef SINETABLE_16BIT 1172228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1182228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectstatic const FIXP_DBL hiPassCoeff[BLOCK_SWITCHING_IIR_LEN]= 1192228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project{ 1202228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project FL2FXCONST_DBL(-0.5095),FL2FXCONST_DBL(0.7548) 1212228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project}; 1222228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1232228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectstatic const FIXP_DBL accWindowNrgFac = FL2FXCONST_DBL(0.3f); /* factor for accumulating filtered window energies */ 1242228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectstatic const FIXP_DBL oneMinusAccWindowNrgFac = FL2FXCONST_DBL(0.7f); 1252228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project/* static const float attackRatio = 10.0; */ /* lower ratio limit for attacks */ 1262228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectstatic const FIXP_DBL invAttackRatio = FL2FXCONST_DBL(0.1f); /* inverted lower ratio limit for attacks */ 1272228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1282228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project/* The next constants are scaled, because they are used for comparison with scaled values*/ 1292228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project/* minimum energy for attacks */ 1302228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectstatic const FIXP_DBL minAttackNrg = (FL2FXCONST_DBL(1e+6f*NORM_PCM_ENERGY)>>BLOCK_SWITCH_ENERGY_SHIFT); /* minimum energy for attacks */ 1312228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1322228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project#else 1332228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1342228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectstatic const FIXP_SGL hiPassCoeff[BLOCK_SWITCHING_IIR_LEN]= 1352228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project{ 1362228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project FL2FXCONST_SGL(-0.5095),FL2FXCONST_SGL(0.7548) 1372228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project}; 1382228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1392228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectstatic const FIXP_DBL accWindowNrgFac = FL2FXCONST_DBL(0.3f); /* factor for accumulating filtered window energies */ 1402228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectstatic const FIXP_SGL oneMinusAccWindowNrgFac = FL2FXCONST_SGL(0.7f); 1412228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project/* static const float attackRatio = 10.0; */ /* lower ratio limit for attacks */ 1422228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectstatic const FIXP_SGL invAttackRatio = FL2FXCONST_SGL(0.1f); /* inverted lower ratio limit for attacks */ 1432228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project/* minimum energy for attacks */ 1442228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectstatic const FIXP_DBL minAttackNrg = (FL2FXCONST_DBL(1e+6f*NORM_PCM_ENERGY)>>BLOCK_SWITCH_ENERGY_SHIFT); /* minimum energy for attacks */ 1452228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1462228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project#endif 1472228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1482228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project/**************** internal function prototypes ***********/ 1492228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1502228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project/****************** Routines ****************************/ 1512228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectvoid FDKaacEnc_InitBlockSwitching(BLOCK_SWITCHING_CONTROL *blockSwitchingControl, INT isLowDelay) 1522228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project{ 1532228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project FDKmemclear (blockSwitchingControl, sizeof(BLOCK_SWITCHING_CONTROL)); 1542228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1552228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project if (isLowDelay) 1562228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project { 1572228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project blockSwitchingControl->nBlockSwitchWindows = 4; 1582228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project blockSwitchingControl->allowShortFrames = 0; 1592228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project blockSwitchingControl->allowLookAhead = 0; 1602228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 1612228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project else 1622228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project { 1632228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project blockSwitchingControl->nBlockSwitchWindows = 8; 1642228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project blockSwitchingControl->allowShortFrames = 1; 1652228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project blockSwitchingControl->allowLookAhead = 1; 1662228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 1672228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1682228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project blockSwitchingControl->noOfGroups = MAX_NO_OF_GROUPS; 1692228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1702228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* Initialize startvalue for blocktype */ 1712228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project blockSwitchingControl->lastWindowSequence = LONG_WINDOW; 1722228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project blockSwitchingControl->windowShape = blockType2windowShape[blockSwitchingControl->allowShortFrames][blockSwitchingControl->lastWindowSequence]; 1732228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1742228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project} 1752228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1762228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectstatic const INT suggestedGroupingTable[TRANS_FAC][MAX_NO_OF_GROUPS] = 1772228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project{ 1782228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* Attack in Window 0 */ {1, 3, 3, 1}, 1792228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* Attack in Window 1 */ {1, 1, 3, 3}, 1802228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* Attack in Window 2 */ {2, 1, 3, 2}, 1812228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* Attack in Window 3 */ {3, 1, 3, 1}, 1822228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* Attack in Window 4 */ {3, 1, 1, 3}, 1832228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* Attack in Window 5 */ {3, 2, 1, 2}, 1842228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* Attack in Window 6 */ {3, 3, 1, 1}, 1852228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* Attack in Window 7 */ {3, 3, 1, 1} 1862228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project}; 1872228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1882228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project/* change block type depending on current blocktype and whether there's an attack */ 1892228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project/* assume no look-ahead */ 1902228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectstatic const INT chgWndSq[2][N_BLOCKTYPES] = 1912228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project{ 1922228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* LONG WINDOW START_WINDOW SHORT_WINDOW STOP_WINDOW, LOWOV_WINDOW, WRONG_WINDOW */ 1932228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /*no attack*/ {LONG_WINDOW, STOP_WINDOW, WRONG_WINDOW, LONG_WINDOW, STOP_WINDOW , WRONG_WINDOW }, 1942228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /*attack */ {START_WINDOW, LOWOV_WINDOW, WRONG_WINDOW, START_WINDOW, LOWOV_WINDOW, WRONG_WINDOW } 1952228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project}; 1962228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1972228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project/* change block type depending on current blocktype and whether there's an attack */ 1982228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project/* assume look-ahead */ 1992228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectstatic const INT chgWndSqLkAhd[2][2][N_BLOCKTYPES] = 2002228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project{ 2012228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /*attack LONG WINDOW START_WINDOW SHORT_WINDOW STOP_WINDOW LOWOV_WINDOW, WRONG_WINDOW */ /* last attack */ 2022228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /*no attack*/ { {LONG_WINDOW, SHORT_WINDOW, STOP_WINDOW, LONG_WINDOW, WRONG_WINDOW, WRONG_WINDOW}, /* no attack */ 2032228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /*attack */ {START_WINDOW, SHORT_WINDOW, SHORT_WINDOW, START_WINDOW, WRONG_WINDOW, WRONG_WINDOW} }, /* no attack */ 2042228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /*no attack*/ { {LONG_WINDOW, SHORT_WINDOW, SHORT_WINDOW, LONG_WINDOW, WRONG_WINDOW, WRONG_WINDOW}, /* attack */ 2052228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /*attack */ {START_WINDOW, SHORT_WINDOW, SHORT_WINDOW, START_WINDOW, WRONG_WINDOW, WRONG_WINDOW} } /* attack */ 2062228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project}; 2072228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 2087ad97579f8ccb843afdb5b184c4b209253839fe3Jean-Michel Triviint FDKaacEnc_BlockSwitching(BLOCK_SWITCHING_CONTROL *blockSwitchingControl, const INT granuleLength, const int isLFE, const INT_PCM *pTimeSignal) 2092228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project{ 2102228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project UINT i; 2112228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project FIXP_DBL enM1, enMax; 2122228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 2132228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project UINT nBlockSwitchWindows = blockSwitchingControl->nBlockSwitchWindows; 2142228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 2152228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* for LFE : only LONG window allowed */ 2162228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project if (isLFE) { 2172228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 2182228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* case LFE: */ 2192228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* only long blocks, always use sine windows (MPEG2 AAC, MPEG4 AAC) */ 2202228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project blockSwitchingControl->lastWindowSequence = LONG_WINDOW; 2212228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project blockSwitchingControl->windowShape = SINE_WINDOW; 2222228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project blockSwitchingControl->noOfGroups = 1; 2232228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project blockSwitchingControl->groupLen[0] = 1; 2242228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 2252228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project return(0); 2262228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project }; 2272228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 2282228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* Save current attack index as last attack index */ 2292228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project blockSwitchingControl->lastattack = blockSwitchingControl->attack; 2302228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project blockSwitchingControl->lastAttackIndex = blockSwitchingControl->attackIndex; 2312228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 2322228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* Save current window energy as last window energy */ 2332228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project FDKmemcpy(blockSwitchingControl->windowNrg[0], blockSwitchingControl->windowNrg[1], sizeof(blockSwitchingControl->windowNrg[0])); 2342228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project FDKmemcpy(blockSwitchingControl->windowNrgF[0], blockSwitchingControl->windowNrgF[1], sizeof(blockSwitchingControl->windowNrgF[0])); 2352228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 2362228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project if (blockSwitchingControl->allowShortFrames) 2372228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project { 2382228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* Calculate suggested grouping info for the last frame */ 2392228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 2402228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* Reset grouping info */ 2412228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project FDKmemclear (blockSwitchingControl->groupLen, sizeof(blockSwitchingControl->groupLen)); 2422228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 2432228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* Set grouping info */ 2442228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project blockSwitchingControl->noOfGroups = MAX_NO_OF_GROUPS; 2452228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 2462228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project FDKmemcpy(blockSwitchingControl->groupLen, suggestedGroupingTable[blockSwitchingControl->lastAttackIndex], sizeof(blockSwitchingControl->groupLen)); 2472228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 2482228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project if (blockSwitchingControl->attack == TRUE) 2492228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project blockSwitchingControl->maxWindowNrg = FDKaacEnc_GetWindowEnergy(blockSwitchingControl->windowNrg[0], blockSwitchingControl->lastAttackIndex); 2502228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project else 2512228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project blockSwitchingControl->maxWindowNrg = FL2FXCONST_DBL(0.0); 2522228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 2532228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 2542228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 2552228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 2562228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* Calculate unfiltered and filtered energies in subwindows and combine to segments */ 2577ad97579f8ccb843afdb5b184c4b209253839fe3Jean-Michel Trivi FDKaacEnc_CalcWindowEnergy(blockSwitchingControl, granuleLength>>(nBlockSwitchWindows==4? 2:3 ), pTimeSignal); 2582228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 2592228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* now calculate if there is an attack */ 2602228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 2612228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* reset attack */ 2622228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project blockSwitchingControl->attack = FALSE; 2632228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 2642228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* look for attack */ 2652228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project enMax = FL2FXCONST_DBL(0.0f); 2662228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project enM1 = blockSwitchingControl->windowNrgF[0][nBlockSwitchWindows-1]; 2672228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 2682228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project for (i=0; i<nBlockSwitchWindows; i++) { 2692228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project FIXP_DBL tmp = fMultDiv2(oneMinusAccWindowNrgFac, blockSwitchingControl->accWindowNrg); 2702228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project blockSwitchingControl->accWindowNrg = fMultAdd(tmp, accWindowNrgFac, enM1) ; 2712228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 2722228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project if (fMult(blockSwitchingControl->windowNrgF[1][i],invAttackRatio) > blockSwitchingControl->accWindowNrg ) { 2732228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project blockSwitchingControl->attack = TRUE; 2742228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project blockSwitchingControl->attackIndex = i; 2752228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 2762228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project enM1 = blockSwitchingControl->windowNrgF[1][i]; 2772228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project enMax = fixMax(enMax, enM1); 2782228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 2792228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 2802228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 2812228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project if (enMax < minAttackNrg) blockSwitchingControl->attack = FALSE; 2822228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 2832228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* Check if attack spreads over frame border */ 2842228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project if((blockSwitchingControl->attack == FALSE) && (blockSwitchingControl->lastattack == TRUE)) { 2852228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* if attack is in last window repeat SHORT_WINDOW */ 2862228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project if ( ((blockSwitchingControl->windowNrgF[0][nBlockSwitchWindows-1]>>4) > fMult((FIXP_DBL)(10<<(DFRACT_BITS-1-4)), blockSwitchingControl->windowNrgF[1][1])) 2872228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project && (blockSwitchingControl->lastAttackIndex == (INT)nBlockSwitchWindows-1) 2882228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project ) 2892228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project { 2902228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project blockSwitchingControl->attack = TRUE; 2912228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project blockSwitchingControl->attackIndex = 0; 2922228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 2932228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 2942228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 2952228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 2962228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project if(blockSwitchingControl->allowLookAhead) 2972228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project { 2982228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 2992228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 3002228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project blockSwitchingControl->lastWindowSequence = 3012228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project chgWndSqLkAhd[blockSwitchingControl->lastattack][blockSwitchingControl->attack][blockSwitchingControl->lastWindowSequence]; 3022228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 3032228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project else 3042228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project { 3052228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* Low Delay */ 3062228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project blockSwitchingControl->lastWindowSequence = 3072228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project chgWndSq[blockSwitchingControl->attack][blockSwitchingControl->lastWindowSequence]; 3082228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 3092228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 3102228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 3112228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* update window shape */ 3122228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project blockSwitchingControl->windowShape = blockType2windowShape[blockSwitchingControl->allowShortFrames][blockSwitchingControl->lastWindowSequence]; 3132228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 3142228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project return(0); 3152228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project} 3162228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 3172228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 3182228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 3192228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectstatic FIXP_DBL FDKaacEnc_GetWindowEnergy(const FIXP_DBL in[], const INT blSwWndIdx) 3202228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project{ 3212228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project/* For coherency, change FDKaacEnc_GetWindowEnergy() to calcluate the energy for a block switching analysis windows, 3222228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project not for a short block. The same is done FDKaacEnc_CalcWindowEnergy(). The result of FDKaacEnc_GetWindowEnergy() 3232228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project is used for a comparision of the max energy of left/right channel. */ 3242228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 3252228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project return in[blSwWndIdx]; 3262228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 3272228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project} 3282228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 3297ad97579f8ccb843afdb5b184c4b209253839fe3Jean-Michel Trivistatic void FDKaacEnc_CalcWindowEnergy(BLOCK_SWITCHING_CONTROL *RESTRICT blockSwitchingControl, INT windowLen, const INT_PCM *pTimeSignal) 3302228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project{ 3312228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project INT i; 3322228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project UINT w; 3332228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 3342228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project FIXP_SGL hiPassCoeff0 = hiPassCoeff[0]; 3352228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project FIXP_SGL hiPassCoeff1 = hiPassCoeff[1]; 3362228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 3372228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* sum up scalarproduct of timesignal as windowed Energies */ 3382228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project for (w=0; w < blockSwitchingControl->nBlockSwitchWindows; w++) { 3392228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 3402228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project FIXP_DBL temp_windowNrg = FL2FXCONST_DBL(0.0f); 3412228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project FIXP_DBL temp_windowNrgF = FL2FXCONST_DBL(0.0f); 3422228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project FIXP_DBL temp_iirState0 = blockSwitchingControl->iirStates[0]; 3432228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project FIXP_DBL temp_iirState1 = blockSwitchingControl->iirStates[1]; 3442228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 3452228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* windowNrg = sum(timesample^2) */ 3462228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project for(i=0;i<windowLen;i++) 3472228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project { 3482228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 3492228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project FIXP_DBL tempUnfiltered, tempFiltred, t1, t2; 3502228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* tempUnfiltered is scaled with 1 to prevent overflows during calculation of tempFiltred */ 3512228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project#if SAMPLE_BITS == DFRACT_BITS 3527ad97579f8ccb843afdb5b184c4b209253839fe3Jean-Michel Trivi tempUnfiltered = (FIXP_DBL) *pTimeSignal++ >> 1; 3532228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project#else 3547ad97579f8ccb843afdb5b184c4b209253839fe3Jean-Michel Trivi tempUnfiltered = (FIXP_DBL) *pTimeSignal++ << (DFRACT_BITS-SAMPLE_BITS-1); 3552228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project#endif 3562228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project t1 = fMultDiv2(hiPassCoeff1, tempUnfiltered-temp_iirState0); 3572228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project t2 = fMultDiv2(hiPassCoeff0, temp_iirState1); 3582228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project tempFiltred = (t1 - t2) << 1; 3592228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 3602228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project temp_iirState0 = tempUnfiltered; 3612228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project temp_iirState1 = tempFiltred; 3622228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 3632228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* subtract 2 from overallscaling (BLOCK_SWITCH_ENERGY_SHIFT) 3642228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project * because tempUnfiltered was already scaled with 1 (is 2 after squaring) 3652228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project * subtract 1 from overallscaling (BLOCK_SWITCH_ENERGY_SHIFT) 3662228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project * because of fMultDiv2 is doing a scaling by one */ 3672228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project temp_windowNrg += fPow2Div2(tempUnfiltered) >> (BLOCK_SWITCH_ENERGY_SHIFT - 1 - 2); 3682228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project temp_windowNrgF += fPow2Div2(tempFiltred) >> (BLOCK_SWITCH_ENERGY_SHIFT - 1 - 2); 3692228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 3702228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project blockSwitchingControl->windowNrg[1][w] = temp_windowNrg; 3712228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project blockSwitchingControl->windowNrgF[1][w] = temp_windowNrgF; 3722228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project blockSwitchingControl->iirStates[0] = temp_iirState0; 3732228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project blockSwitchingControl->iirStates[1] = temp_iirState1; 3742228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 3752228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project} 3762228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 3772228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 3782228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectstatic const UCHAR synchronizedBlockTypeTable[5][5] = 3792228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project{ 3802228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* LONG_WINDOW START_WINDOW SHORT_WINDOW STOP_WINDOW LOWOV_WINDOW*/ 3812228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* LONG_WINDOW */ {LONG_WINDOW, START_WINDOW, SHORT_WINDOW, STOP_WINDOW, LOWOV_WINDOW}, 3822228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* START_WINDOW */ {START_WINDOW, START_WINDOW, SHORT_WINDOW, SHORT_WINDOW, LOWOV_WINDOW}, 3832228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* SHORT_WINDOW */ {SHORT_WINDOW, SHORT_WINDOW, SHORT_WINDOW, SHORT_WINDOW, WRONG_WINDOW}, 3842228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* STOP_WINDOW */ {STOP_WINDOW, SHORT_WINDOW, SHORT_WINDOW, STOP_WINDOW, LOWOV_WINDOW}, 3852228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* LOWOV_WINDOW */ {LOWOV_WINDOW, LOWOV_WINDOW, WRONG_WINDOW, LOWOV_WINDOW, LOWOV_WINDOW}, 3862228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project}; 3872228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 3882228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectint FDKaacEnc_SyncBlockSwitching ( 3892228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project BLOCK_SWITCHING_CONTROL *blockSwitchingControlLeft, 3902228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project BLOCK_SWITCHING_CONTROL *blockSwitchingControlRight, 3912228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project const INT nChannels, 3922228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project const INT commonWindow ) 3932228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project{ 3942228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project UCHAR patchType = LONG_WINDOW; 3952228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 3962228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project if( nChannels == 2 && commonWindow == TRUE) 3972228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project { 3982228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* could be better with a channel loop (need a handle to psy_data) */ 3992228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* get suggested Block Types and synchronize */ 4002228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project patchType = synchronizedBlockTypeTable[patchType][blockSwitchingControlLeft->lastWindowSequence]; 4012228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project patchType = synchronizedBlockTypeTable[patchType][blockSwitchingControlRight->lastWindowSequence]; 4022228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 4032228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* sanity check (no change from low overlap window to short winow and vice versa) */ 4042228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project if (patchType == WRONG_WINDOW) 4052228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project return -1; /* mixed up AAC-LC and AAC-LD */ 4062228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 4072228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* Set synchronized Blocktype */ 4082228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project blockSwitchingControlLeft->lastWindowSequence = patchType; 4092228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project blockSwitchingControlRight->lastWindowSequence = patchType; 4102228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 4112228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* update window shape */ 4122228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project blockSwitchingControlLeft->windowShape = blockType2windowShape[blockSwitchingControlLeft->allowShortFrames][blockSwitchingControlLeft->lastWindowSequence]; 4132228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project blockSwitchingControlRight->windowShape = blockType2windowShape[blockSwitchingControlLeft->allowShortFrames][blockSwitchingControlRight->lastWindowSequence]; 4142228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 4152228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 4162228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project if (blockSwitchingControlLeft->allowShortFrames) 4172228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project { 4182228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project int i; 4192228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 4202228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project if( nChannels == 2 ) 4212228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project { 4222228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project if (commonWindow == TRUE) 4232228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project { 4242228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* Synchronize grouping info */ 4252228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project int windowSequenceLeftOld = blockSwitchingControlLeft->lastWindowSequence; 4262228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project int windowSequenceRightOld = blockSwitchingControlRight->lastWindowSequence; 4272228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 4282228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* Long Blocks */ 4292228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project if(patchType != SHORT_WINDOW) { 4302228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* Set grouping info */ 4312228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project blockSwitchingControlLeft->noOfGroups = 1; 4322228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project blockSwitchingControlRight->noOfGroups = 1; 4332228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project blockSwitchingControlLeft->groupLen[0] = 1; 4342228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project blockSwitchingControlRight->groupLen[0] = 1; 4352228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 4362228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project for (i = 1; i < MAX_NO_OF_GROUPS; i++) 4372228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project { 4382228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project blockSwitchingControlLeft->groupLen[i] = 0; 4392228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project blockSwitchingControlRight->groupLen[i] = 0; 4402228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 4412228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 4422228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 4432228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* Short Blocks */ 4442228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project else { 4452228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* in case all two channels were detected as short-blocks before syncing, use the grouping of channel with higher maxWindowNrg */ 4462228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project if( (windowSequenceLeftOld == SHORT_WINDOW) && 4472228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project (windowSequenceRightOld == SHORT_WINDOW) ) 4482228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project { 4492228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project if(blockSwitchingControlLeft->maxWindowNrg > blockSwitchingControlRight->maxWindowNrg) { 4502228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* Left Channel wins */ 4512228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project blockSwitchingControlRight->noOfGroups = blockSwitchingControlLeft->noOfGroups; 4522228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project for (i = 0; i < MAX_NO_OF_GROUPS; i++){ 4532228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project blockSwitchingControlRight->groupLen[i] = blockSwitchingControlLeft->groupLen[i]; 4542228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 4552228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 4562228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project else { 4572228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* Right Channel wins */ 4582228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project blockSwitchingControlLeft->noOfGroups = blockSwitchingControlRight->noOfGroups; 4592228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project for (i = 0; i < MAX_NO_OF_GROUPS; i++){ 4602228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project blockSwitchingControlLeft->groupLen[i] = blockSwitchingControlRight->groupLen[i]; 4612228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 4622228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 4632228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 4642228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project else if ( (windowSequenceLeftOld == SHORT_WINDOW) && 4652228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project (windowSequenceRightOld != SHORT_WINDOW) ) 4662228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project { 4672228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* else use grouping of short-block channel */ 4682228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project blockSwitchingControlRight->noOfGroups = blockSwitchingControlLeft->noOfGroups; 4692228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project for (i = 0; i < MAX_NO_OF_GROUPS; i++){ 4702228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project blockSwitchingControlRight->groupLen[i] = blockSwitchingControlLeft->groupLen[i]; 4712228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 4722228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 4732228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project else if ( (windowSequenceRightOld == SHORT_WINDOW) && 4742228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project (windowSequenceLeftOld != SHORT_WINDOW) ) 4752228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project { 4762228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project blockSwitchingControlLeft->noOfGroups = blockSwitchingControlRight->noOfGroups; 4772228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project for (i = 0; i < MAX_NO_OF_GROUPS; i++){ 4782228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project blockSwitchingControlLeft->groupLen[i] = blockSwitchingControlRight->groupLen[i]; 4792228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 4802228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } else { 4812228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* syncing a start and stop window ... */ 4822228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project blockSwitchingControlLeft->noOfGroups = blockSwitchingControlRight->noOfGroups = 2; 4832228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project blockSwitchingControlLeft->groupLen[0] = blockSwitchingControlRight->groupLen[0] = 4; 4842228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project blockSwitchingControlLeft->groupLen[1] = blockSwitchingControlRight->groupLen[1] = 4; 4852228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 4862228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } /* Short Blocks */ 4872228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 4882228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project else { 4892228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* stereo, no common window */ 4902228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project if (blockSwitchingControlLeft->lastWindowSequence!=SHORT_WINDOW){ 4912228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project blockSwitchingControlLeft->noOfGroups = 1; 4922228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project blockSwitchingControlLeft->groupLen[0] = 1; 4932228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project for (i = 1; i < MAX_NO_OF_GROUPS; i++) 4942228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project { 4952228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project blockSwitchingControlLeft->groupLen[i] = 0; 4962228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 4972228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 4982228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project if (blockSwitchingControlRight->lastWindowSequence!=SHORT_WINDOW){ 4992228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project blockSwitchingControlRight->noOfGroups = 1; 5002228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project blockSwitchingControlRight->groupLen[0] = 1; 5012228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project for (i = 1; i < MAX_NO_OF_GROUPS; i++) 5022228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project { 5032228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project blockSwitchingControlRight->groupLen[i] = 0; 5042228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 5052228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 5062228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } /* common window */ 5072228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } else { 5082228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* Mono */ 5092228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project if (blockSwitchingControlLeft->lastWindowSequence!=SHORT_WINDOW){ 5102228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project blockSwitchingControlLeft->noOfGroups = 1; 5112228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project blockSwitchingControlLeft->groupLen[0] = 1; 5122228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 5132228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project for (i = 1; i < MAX_NO_OF_GROUPS; i++) 5142228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project { 5152228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project blockSwitchingControlLeft->groupLen[i] = 0; 5162228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 5172228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 5182228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 5192228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } /* allowShortFrames */ 5202228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 5212228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 5222228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project /* Translate LOWOV_WINDOW block type to a meaningful window shape. */ 5232228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project if ( ! blockSwitchingControlLeft->allowShortFrames ) { 5242228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project if ( blockSwitchingControlLeft->lastWindowSequence != LONG_WINDOW 5252228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project && blockSwitchingControlLeft->lastWindowSequence != STOP_WINDOW ) 5262228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project { 5272228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project blockSwitchingControlLeft->lastWindowSequence = LONG_WINDOW; 5282228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project blockSwitchingControlLeft->windowShape = LOL_WINDOW; 5292228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 5302228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 5312228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project if (nChannels == 2) { 5322228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project if ( ! blockSwitchingControlRight->allowShortFrames ) { 5332228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project if ( blockSwitchingControlRight->lastWindowSequence != LONG_WINDOW 5342228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project && blockSwitchingControlRight->lastWindowSequence != STOP_WINDOW ) 5352228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project { 5362228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project blockSwitchingControlRight->lastWindowSequence = LONG_WINDOW; 5372228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project blockSwitchingControlRight->windowShape = LOL_WINDOW; 5382228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 5392228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 5402228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } 5412228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 5422228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project return 0; 5432228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project} 5442228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 5452228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 546