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/*************************** Fraunhofer IIS FDK Tools ********************** 852228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 862228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project Author(s): Manuel Jander, Josef Hoepfl 872228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project Description: MDCT routines 882228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 892228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project******************************************************************************/ 902228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 912228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project#ifndef __MDCT_H__ 922228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project#define __MDCT_H__ 932228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 942228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 952228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 962228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project#include "common_fix.h" 972228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 982228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project#define MDCT_OUT_HEADROOM 2 /* Output additional headroom */ 992228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project#define MDCT_OUTPUT_SCALE (DFRACT_BITS-SAMPLE_BITS-MDCT_OUT_HEADROOM) 1002228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project/* Refer to "Output word length" in ISO/IEC 14496-3:2008(E) 23.2.3.6 */ 1012228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project#define MDCT_OUTPUT_GAIN 16 1022228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1032228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project#if (SAMPLE_BITS == DFRACT_BITS) 1042228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project#define IMDCT_SCALE(x) (INT_PCM)SATURATE_LEFT_SHIFT(x, -MDCT_OUTPUT_SCALE, SAMPLE_BITS) 1052228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project#else 1062228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project#define IMDCT_SCALE(x) (INT_PCM)SATURATE_RIGHT_SHIFT(x, MDCT_OUTPUT_SCALE, SAMPLE_BITS) 1072228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project#endif 1082228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project#define IMDCT_SCALE_DBL(x) (FIXP_DBL)(x) 1092228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1102228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project/** 1112228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project * \brief MDCT persistent data 1122228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project */ 1132228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projecttypedef struct { 1142228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project union { 1152228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project FIXP_DBL *freq; 1162228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project FIXP_DBL *time; 1172228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project } overlap; /**< Pointer to overlap memory */ 1182228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1192228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project const FIXP_WTP *prev_wrs; /**< pointer to previous right window slope */ 1202228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project int prev_tl; /**< previous tranform length */ 1212228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project int prev_nr; /**< previous right window offset */ 1222228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project int prev_fr; /**< previous right window slope length */ 1232228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project int ov_offset; /**< overlap time data fill level */ 1242228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project int ov_size; /**< Overlap buffer size in words */ 1252228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1262228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project} mdct_t; 1272228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1282228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projecttypedef mdct_t* H_MDCT; 1292228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1302228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project/** 1312228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project * \brief Initialize as valid MDCT handle 1322228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project * 1332228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project * \param hMdct handle of an allocated MDCT handle. 1342228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project * \param overlap pointer to FIXP_DBL overlap buffer. 1352228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project * \param overlapBufferSize size in FIXP_DBLs of the given overlap buffer. 1362228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project * \return void 1372228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project */ 1382228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectvoid mdct_init( H_MDCT hMdct, 1392228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project FIXP_DBL *overlap, 1402228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project INT overlapBufferSize ); 1412228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1422228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project/** 1432228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project * \brief perform MDCT transform (time domain to frequency domain) with given parameters. 1442228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project * 1452228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project * \param hMdct handle of an allocated MDCT handle. 1462228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project * \param spectrum pointer to where the resulting MDCT spectrum will be stored into. 1472228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project * \param scalefactor pointer to the input scale shift value. Updated accordingly on return. 1482228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project * \param input pointer to input time domain signal 1492228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project * \param tl transformation length. 1502228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project * \param nr right window slope offset (amount of window coefficients assumed to be 1.0) 1512228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project * \param fr right overlap window slope length 1522228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project * \param wrs pointer to the right side overlap window coefficients. 1532228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project * \return number of input samples processed. 1542228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project */ 1552228e360595641dd906bf1773307f43d304f5b2The Android Open Source ProjectINT mdct_block( 1562228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project H_MDCT hMdct, 1572228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project FIXP_DBL *spectrum, 1582228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project INT *scalefactor, 1592228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project INT_PCM *input, 1602228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project INT tl, 1612228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project INT nr, 1622228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project INT fr, 1632228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project const FIXP_WTB *wrs ); 1642228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1652228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1662228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project/** 1672228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project * \brief add/multiply 2/N transform gain and MPEG4 part 3 defined output gain (see definition 1682228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project * of MDCT_OUTPUT_GAIN) to given mantissa factor and exponent. 1692228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project * \param pGain pointer to the mantissa of a gain factor to be applied to IMDCT data. 1702228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project * \param pExponent pointer to the exponent of a gain factor to be applied to IMDCT data. 1712228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project * \param tl length of the IMDCT where the gain *pGain * (2 ^ *pExponent) will be applied to. 1722228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project */ 1732228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectvoid imdct_gain( 1742228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project FIXP_DBL *pGain, 1752228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project int *pExponent, 1762228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project int tl 1772228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project ); 1782228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1792228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project/** 1802228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project * \brief drain buffered output samples into given buffer. Changes the MDCT state. 1812228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project */ 1822228e360595641dd906bf1773307f43d304f5b2The Android Open Source ProjectINT imdct_drain( 1832228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project H_MDCT hMdct, 1842228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project FIXP_DBL * pTimeData, 1852228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project INT nrSamplesRoom 1862228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project ); 1872228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1882228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1892228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project/** 1902228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project * \brief Copy overlap time domain data to given buffer. Does not change the MDCT state. 1912228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project * \return number of actually copied samples (ov + nr). 1922228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project */ 1932228e360595641dd906bf1773307f43d304f5b2The Android Open Source ProjectINT imdct_copy_ov_and_nr( 1942228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project H_MDCT hMdct, 1952228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project FIXP_DBL * pTimeData, 1962228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project INT nrSamples 1972228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project ); 1982228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 1992228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project/** 2002228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project * \brief Adapt MDCT parameters for non-matching window slopes. 2012228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project * \param hMdct handle of an allocated MDCT handle. 2022228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project * \param pfl pointer to left overlap window side length. 2032228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project * \param pnl pointer to length of the left n part of the window. 2042228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project * \param tl transform length. 2052228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project * \param wls pointer to the left side overlap window coefficients. 2062228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project * \param noOutSamples desired number of output samples. 2072228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project */ 2082228e360595641dd906bf1773307f43d304f5b2The Android Open Source Projectvoid imdct_adapt_parameters(H_MDCT hMdct, int *pfl, int *pnl, int tl, const FIXP_WTP *wls, int noOutSamples); 2092228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 2102228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project/** 2112228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project * \brief perform several inverse MDCT transforms (frequency domain to time domain) with given parameters. 2122228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project * 2132228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project * \param hMdct handle of an allocated MDCT handle. 2142228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project * \param output pointer to where the output time domain signal will be stored into. 2152228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project * \param stride the stride factor for accessing time domain samples in output. 2162228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project * \param spectrum pointer to the input MDCT spectra. 2172228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project * \param scalefactors scale shift values of the input spectrum. 2182228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project * \param nSpec number of MDCT spectrums. 2192228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project * \param noOutSamples desired number of output samples. 2202228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project * \param tl transform length. 2212228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project * \param wls pointer to the left side overlap window coefficients. 2222228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project * \param fl left overlap window side length. 2232228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project * \param wrs pointer to the right side overlap window coefficients of all individual IMDCTs. 2242228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project * \param fr right overlap window side length of all individual IMDCTs. 2252228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project * \param gain factor to apply to output samples (if != 0). 2262228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project * \return number of output samples returned. 2272228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project */ 2282228e360595641dd906bf1773307f43d304f5b2The Android Open Source ProjectINT imdct_block( 2292228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project H_MDCT hMdct, 2302228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project FIXP_DBL *output, 2312228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project FIXP_DBL *spectrum, 2322228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project const SHORT scalefactor[], 2332228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project const INT nSpec, 2342228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project const INT noOutSamples, 2352228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project const INT tl, 2362228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project const FIXP_WTP *wls, 2372228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project INT fl, 2382228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project const FIXP_WTP *wrs, 2392228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project const INT fr, 2402228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project FIXP_DBL gain ); 2412228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 2422228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project 2432228e360595641dd906bf1773307f43d304f5b2The Android Open Source Project#endif /* __MDCT_H__ */ 244