Upgrade to FDKv2

Bug: 71430241
Test: CTS DecoderTest and DecoderTestAacDrc

original-Change-Id: Iaa20f749b8a04d553b20247cfe1a8930ebbabe30

Apply clang-format also on header files.

original-Change-Id: I14de1ef16bbc79ec0283e745f98356a10efeb2e4

Fixes for MPEG-D DRC

original-Change-Id: If1de2d74bbbac84b3f67de3b88b83f6a23b8a15c

Catch unsupported tw_mdct at an early stage

original-Change-Id: Ied9dd00d754162a0e3ca1ae3e6b854315d818afe

Fixing PVC transition frames

original-Change-Id: Ib75725abe39252806c32d71176308f2c03547a4e

Move qmf bands sanity check

original-Change-Id: Iab540c3013c174d9490d2ae100a4576f51d8dbc4

Initialize scaling variable

original-Change-Id: I3c4087101b70e998c71c1689b122b0d7762e0f9e

Add 16 qmf band configuration to getSlotNrgHQ()

original-Change-Id: I49a5d30f703a1b126ff163df9656db2540df21f1

Always apply byte alignment at the end of the AudioMuxElement

original-Change-Id: I42d560287506d65d4c3de8bfe3eb9a4ebeb4efc7

Setup SBR element only if no parse error exists

original-Change-Id: I1915b73704bc80ab882b9173d6bec59cbd073676

Additional array index check in HCR

original-Change-Id: I18cc6e501ea683b5009f1bbee26de8ddd04d8267

Fix fade-in index selection in concealment module

original-Change-Id: Ibf802ed6ed8c05e9257e1f3b6d0ac1162e9b81c1

Enable explicit backward compatible parser for AAC_LD

original-Change-Id: I27e9c678dcb5d40ed760a6d1e06609563d02482d

Skip spatial specific config in explicit backward compatible ASC

original-Change-Id: Iff7cc365561319e886090cedf30533f562ea4d6e

Update flags description in decoder API

original-Change-Id: I9a5b4f8da76bb652f5580cbd3ba9760425c43830

Add QMF domain reset function

original-Change-Id: I4f89a8a2c0277d18103380134e4ed86996e9d8d6

DRC upgrade v2.1.0

original-Change-Id: I5731c0540139dab220094cd978ef42099fc45b74

Fix integer overflow in sqrtFixp_lookup()

original-Change-Id: I429a6f0d19aa2cc957e0f181066f0ca73968c914

Fix integer overflow in invSqrtNorm2()

original-Change-Id: I84de5cbf9fb3adeb611db203fe492fabf4eb6155

Fix integer overflow in GenerateRandomVector()

original-Change-Id: I3118a641008bd9484d479e5b0b1ee2b5d7d44d74

Fix integer overflow in adjustTimeSlot_EldGrid()

original-Change-Id: I29d503c247c5c8282349b79df940416a512fb9d5

Fix integer overflow in FDKsbrEnc_codeEnvelope()

original-Change-Id: I6b34b61ebb9d525b0c651ed08de2befc1f801449

Follow-up on: Fix integer overflow in adjustTimeSlot_EldGrid()

original-Change-Id: I6f8f578cc7089e5eb7c7b93e580b72ca35ad689a

Fix integer overflow in get_pk_v2()

original-Change-Id: I63375bed40d45867f6eeaa72b20b1f33e815938c

Fix integer overflow in Syn_filt_zero()

original-Change-Id: Ie0c02fdfbe03988f9d3b20d10cd9fe4c002d1279

Fix integer overflow in CFac_CalcFacSignal()

original-Change-Id: Id2d767c40066c591b51768e978eb8af3b803f0c5

Fix integer overflow in FDKaacEnc_FDKaacEnc_calcPeNoAH()

original-Change-Id: Idcbd0f4a51ae2550ed106aa6f3d678d1f9724841

Fix integer overflow in sbrDecoder_calculateGainVec()

original-Change-Id: I7081bcbe29c5cede9821b38d93de07c7add2d507

Fix integer overflow in CLpc_SynthesisLattice()

original-Change-Id: I4a95ddc18de150102352d4a1845f06094764c881

Fix integer overflow in Pred_Lt4()

original-Change-Id: I4dbd012b2de7d07c3e70a47b92e3bfae8dbc750a

Fix integer overflow in FDKsbrEnc_InitSbrFastTransientDetector()

original-Change-Id: I788cbec1a4a00f44c2f3a72ad7a4afa219807d04

Fix unsigned integer overflow in FDKaacEnc_WriteBitstream()

original-Change-Id: I68fc75166e7d2cd5cd45b18dbe3d8c2a92f1822a

Fix unsigned integer overflow in FDK_MetadataEnc_Init()

original-Change-Id: Ie8d025f9bcdb2442c704bd196e61065c03c10af4

Fix overflow in pseudo random number generators

original-Change-Id: I3e2551ee01356297ca14e3788436ede80bd5513c

Fix unsigned integer overflow in sbrDecoder_Parse()

original-Change-Id: I3f231b2f437e9c37db4d5b964164686710eee971

Fix unsigned integer overflow in longsub()

original-Change-Id: I73c2bc50415cac26f1f5a29e125bbe75f9180a6e

Fix unsigned integer overflow in CAacDecoder_DecodeFrame()

original-Change-Id: Ifce2db4b1454b46fa5f887e9d383f1cc43b291e4

Fix overflow at CLpdChannelStream_Read()

original-Change-Id: Idb9d822ce3a4272e4794b643644f5434e2d4bf3f

Fix unsigned integer overflow in Hcr_State_BODY_SIGN_ESC__ESC_WORD()

original-Change-Id: I1ccf77c0015684b85534c5eb97162740a870b71c

Fix unsigned integer overflow in UsacConfig_Parse()

original-Change-Id: Ie6d27f84b6ae7eef092ecbff4447941c77864d9f

Fix unsigned integer overflow in aacDecoder_drcParse()

original-Change-Id: I713f28e883eea3d70b6fa56a7b8f8c22bcf66ca0

Fix unsigned integer overflow in aacDecoder_drcReadCompression()

original-Change-Id: Ia34dfeb88c4705c558bce34314f584965cafcf7a

Fix unsigned integer overflow in CDataStreamElement_Read()

original-Change-Id: Iae896cc1d11f0a893d21be6aa90bd3e60a2c25f0

Fix unsigned integer overflow in transportDec_AdjustEndOfAccessUnit()

original-Change-Id: I64cf29a153ee784bb4a16fdc088baabebc0007dc

Fix unsigned integer overflow in transportDec_GetAuBitsRemaining()

original-Change-Id: I975b3420faa9c16a041874ba0db82e92035962e4

Fix unsigned integer overflow in extractExtendedData()

original-Change-Id: I2a59eb09e2053cfb58dfb75fcecfad6b85a80a8f

Fix signed integer overflow in CAacDecoder_ExtPayloadParse()

original-Change-Id: I4ad5ca4e3b83b5d964f1c2f8c5e7b17c477c7929

Fix unsigned integer overflow in CAacDecoder_DecodeFrame()

original-Change-Id: I29a39df77d45c52a0c9c5c83c1ba81f8d0f25090

Follow-up on: Fix integer overflow in CLpc_SynthesisLattice()

original-Change-Id: I8fb194ffc073a3432a380845be71036a272d388f

Fix signed integer overflow in _interpolateDrcGain()

original-Change-Id: I879ec9ab14005069a7c47faf80e8bc6e03d22e60

Fix unsigned integer overflow in FDKreadBits()

original-Change-Id: I1f47a6a8037ff70375aa8844947d5681bb4287ad

Fix unsigned integer overflow in FDKbyteAlign()

original-Change-Id: Id5f3a11a0c9e50fc6f76ed6c572dbd4e9f2af766

Fix unsigned integer overflow in FDK_get32()

original-Change-Id: I9d33b8e97e3d38cbb80629cb859266ca0acdce96

Fix unsigned integer overflow in FDK_pushBack()

original-Change-Id: Ic87f899bc8c6acf7a377a8ca7f3ba74c3a1e1c19

Fix unsigned integer overflow in FDK_pushForward()

original-Change-Id: I3b754382f6776a34be1602e66694ede8e0b8effc

Fix unsigned integer overflow in ReadPsData()

original-Change-Id: I25361664ba8139e32bbbef2ca8c106a606ce9c37

Fix signed integer overflow in E_UTIL_residu()

original-Change-Id: I8c3abd1f437ee869caa8fb5903ce7d3d641b6aad

REVERT: Follow-up on: Integer overflow in CLpc_SynthesisLattice().

original-Change-Id: I3d340099acb0414795c8dfbe6362bc0a8f045f9b

Follow-up on: Fix integer overflow in CLpc_SynthesisLattice()

original-Change-Id: I4aedb8b3a187064e9f4d985175aa55bb99cc7590

Follow-up on: Fix unsigned integer overflow in aacDecoder_drcParse()

original-Change-Id: I2aa2e13916213bf52a67e8b0518e7bf7e57fb37d

Fix integer overflow in acelp

original-Change-Id: Ie6390c136d84055f8b728aefbe4ebef6e029dc77

Fix unsigned integer overflow in aacDecoder_UpdateBitStreamCounters()

original-Change-Id: I391ffd97ddb0b2c184cba76139bfb356a3b4d2e2

Adjust concealment default settings

original-Change-Id: I6a95db935a327c47df348030bcceafcb29f54b21

Saturate estimatedStartPos

original-Change-Id: I27be2085e0ae83ec9501409f65e003f6bcba1ab6

Negative shift exponent in _interpolateDrcGain()

original-Change-Id: I18edb26b26d002aafd5e633d4914960f7a359c29

Negative shift exponent in calculateICC()

original-Change-Id: I3dcd2ae98d2eb70ee0d59750863cbb2a6f4f8aba

Too large shift exponent in FDK_put()

original-Change-Id: Ib7d9aaa434d2d8de4a13b720ca0464b31ca9b671

Too large shift exponent in CalcInvLdData()

original-Change-Id: I43e6e78d4cd12daeb1dcd5d82d1798bdc2550262

Member access within null pointer of type SBR_CHANNEL

original-Change-Id: Idc5e4ea8997810376d2f36bbdf628923b135b097

Member access within null pointer of type CpePersistentData

original-Change-Id: Ib6c91cb0d37882768e5baf63324e429589de0d9d

Member access within null pointer FDKaacEnc_psyMain()

original-Change-Id: I7729b7f4479970531d9dc823abff63ca52e01997

Member access within null pointer FDKaacEnc_GetPnsParam()

original-Change-Id: I9aa3b9f3456ae2e0f7483dbd5b3dde95fc62da39

Member access within null pointer FDKsbrEnc_EnvEncodeFrame()

original-Change-Id: I67936f90ea714e90b3e81bc0dd1472cc713eb23a

Add HCR sanity check

original-Change-Id: I6c1d9732ebcf6af12f50b7641400752f74be39f7

Fix memory issue for HBE edge case with 8:3 SBR

original-Change-Id: I11ea58a61e69fbe8bf75034b640baee3011e63e9

Additional SBR parametrization sanity check for ELD

original-Change-Id: Ie26026fbfe174c2c7b3691f6218b5ce63e322140

Add MPEG-D DRC channel layout check

original-Change-Id: Iea70a74f171b227cce636a9eac4ba662777a2f72

Additional out-of-bounds checks in MPEG-D DRC

original-Change-Id: Ife4a8c3452c6fde8a0a09e941154a39a769777d4

Change-Id: Ic63cb2f628720f54fe9b572b0cb528e2599c624e

1 files changed, 209 insertions, 179 deletions

diff --git a/libAACenc/src/transform.cpp b/libAACenc/src/transform.cpp
index 690b82e..08b1c2f 100644
--- a/libAACenc/src/transform.cpp
+++ b/libAACenc/src/transform.cpp
@@ -1,74 +1,85 @@
-
-/* -----------------------------------------------------------------------------------------------------------
+/* -----------------------------------------------------------------------------
 Software License for The Fraunhofer FDK AAC Codec Library for Android
 
-© Copyright  1995 - 2013 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
-  All rights reserved.
+© Copyright  1995 - 2018 Fraunhofer-Gesellschaft zur Förderung der angewandten
+Forschung e.V. All rights reserved.
 
  1.    INTRODUCTION
-The Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software that implements
-the MPEG Advanced Audio Coding ("AAC") encoding and decoding scheme for digital audio.
-This FDK AAC Codec software is intended to be used on a wide variety of Android devices.
-
-AAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient general perceptual
-audio codecs. AAC-ELD is considered the best-performing full-bandwidth communications codec by
-independent studies and is widely deployed. AAC has been standardized by ISO and IEC as part
-of the MPEG specifications.
-
-Patent licenses for necessary patent claims for the FDK AAC Codec (including those of Fraunhofer)
-may be obtained through Via Licensing (www.vialicensing.com) or through the respective patent owners
-individually for the purpose of encoding or decoding bit streams in products that are compliant with
-the ISO/IEC MPEG audio standards. Please note that most manufacturers of Android devices already license
-these patent claims through Via Licensing or directly from the patent owners, and therefore FDK AAC Codec
-software may already be covered under those patent licenses when it is used for those licensed purposes only.
-
-Commercially-licensed AAC software libraries, including floating-point versions with enhanced sound quality,
-are also available from Fraunhofer. Users are encouraged to check the Fraunhofer website for additional
-applications information and documentation.
+The Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software
+that implements the MPEG Advanced Audio Coding ("AAC") encoding and decoding
+scheme for digital audio. This FDK AAC Codec software is intended to be used on
+a wide variety of Android devices.
+
+AAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient
+general perceptual audio codecs. AAC-ELD is considered the best-performing
+full-bandwidth communications codec by independent studies and is widely
+deployed. AAC has been standardized by ISO and IEC as part of the MPEG
+specifications.
+
+Patent licenses for necessary patent claims for the FDK AAC Codec (including
+those of Fraunhofer) may be obtained through Via Licensing
+(www.vialicensing.com) or through the respective patent owners individually for
+the purpose of encoding or decoding bit streams in products that are compliant
+with the ISO/IEC MPEG audio standards. Please note that most manufacturers of
+Android devices already license these patent claims through Via Licensing or
+directly from the patent owners, and therefore FDK AAC Codec software may
+already be covered under those patent licenses when it is used for those
+licensed purposes only.
+
+Commercially-licensed AAC software libraries, including floating-point versions
+with enhanced sound quality, are also available from Fraunhofer. Users are
+encouraged to check the Fraunhofer website for additional applications
+information and documentation.
 
 2.    COPYRIGHT LICENSE
 
-Redistribution and use in source and binary forms, with or without modification, are permitted without
-payment of copyright license fees provided that you satisfy the following conditions:
+Redistribution and use in source and binary forms, with or without modification,
+are permitted without payment of copyright license fees provided that you
+satisfy the following conditions:
 
-You must retain the complete text of this software license in redistributions of the FDK AAC Codec or
-your modifications thereto in source code form.
+You must retain the complete text of this software license in redistributions of
+the FDK AAC Codec or your modifications thereto in source code form.
 
-You must retain the complete text of this software license in the documentation and/or other materials
-provided with redistributions of the FDK AAC Codec or your modifications thereto in binary form.
-You must make available free of charge copies of the complete source code of the FDK AAC Codec and your
+You must retain the complete text of this software license in the documentation
+and/or other materials provided with redistributions of the FDK AAC Codec or
+your modifications thereto in binary form. You must make available free of
+charge copies of the complete source code of the FDK AAC Codec and your
 modifications thereto to recipients of copies in binary form.
 
-The name of Fraunhofer may not be used to endorse or promote products derived from this library without
-prior written permission.
+The name of Fraunhofer may not be used to endorse or promote products derived
+from this library without prior written permission.
 
-You may not charge copyright license fees for anyone to use, copy or distribute the FDK AAC Codec
-software or your modifications thereto.
+You may not charge copyright license fees for anyone to use, copy or distribute
+the FDK AAC Codec software or your modifications thereto.
 
-Your modified versions of the FDK AAC Codec must carry prominent notices stating that you changed the software
-and the date of any change. For modified versions of the FDK AAC Codec, the term
-"Fraunhofer FDK AAC Codec Library for Android" must be replaced by the term
-"Third-Party Modified Version of the Fraunhofer FDK AAC Codec Library for Android."
+Your modified versions of the FDK AAC Codec must carry prominent notices stating
+that you changed the software and the date of any change. For modified versions
+of the FDK AAC Codec, the term "Fraunhofer FDK AAC Codec Library for Android"
+must be replaced by the term "Third-Party Modified Version of the Fraunhofer FDK
+AAC Codec Library for Android."
 
 3.    NO PATENT LICENSE
 
-NO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without limitation the patents of Fraunhofer,
-ARE GRANTED BY THIS SOFTWARE LICENSE. Fraunhofer provides no warranty of patent non-infringement with
-respect to this software.
+NO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without
+limitation the patents of Fraunhofer, ARE GRANTED BY THIS SOFTWARE LICENSE.
+Fraunhofer provides no warranty of patent non-infringement with respect to this
+software.
 
-You may use this FDK AAC Codec software or modifications thereto only for purposes that are authorized
-by appropriate patent licenses.
+You may use this FDK AAC Codec software or modifications thereto only for
+purposes that are authorized by appropriate patent licenses.
 
 4.    DISCLAIMER
 
-This FDK AAC Codec software is provided by Fraunhofer on behalf of the copyright holders and contributors
-"AS IS" and WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, including but not limited to the implied warranties
-of merchantability and fitness for a particular purpose. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
-CONTRIBUTORS BE LIABLE for any direct, indirect, incidental, special, exemplary, or consequential damages,
-including but not limited to procurement of substitute goods or services; loss of use, data, or profits,
-or business interruption, however caused and on any theory of liability, whether in contract, strict
-liability, or tort (including negligence), arising in any way out of the use of this software, even if
-advised of the possibility of such damage.
+This FDK AAC Codec software is provided by Fraunhofer on behalf of the copyright
+holders and contributors "AS IS" and WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES,
+including but not limited to the implied warranties of merchantability and
+fitness for a particular purpose. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
+CONTRIBUTORS BE LIABLE for any direct, indirect, incidental, special, exemplary,
+or consequential damages, including but not limited to procurement of substitute
+goods or services; loss of use, data, or profits, or business interruption,
+however caused and on any theory of liability, whether in contract, strict
+liability, or tort (including negligence), arising in any way out of the use of
+this software, even if advised of the possibility of such damage.
 
 5.    CONTACT INFORMATION
 
@@ -79,9 +90,11 @@ Am Wolfsmantel 33
 
 www.iis.fraunhofer.de/amm
 amm-info@iis.fraunhofer.de
------------------------------------------------------------------------------------------------------------ */
+----------------------------------------------------------------------------- */
+
+/**************************** AAC encoder library ******************************
 
-/*****************************************************************************
+   Author(s):   Tobias Chalupka
 
    Description: FDKaacLdEnc_MdctTransform480:
                 The module FDKaacLdEnc_MdctTransform will perform the MDCT.
@@ -90,175 +103,192 @@ amm-info@iis.fraunhofer.de
                 can be divided in  Windowing, PreModulation, Fft and
                 PostModulation.
 
-******************************************************************************/
+*******************************************************************************/
 
 #include "transform.h"
-
 #include "dct.h"
 #include "psy_const.h"
 #include "aacEnc_rom.h"
 #include "FDK_tools_rom.h"
 
-INT FDKaacEnc_Transform_Real (const INT_PCM * pTimeData,
-                              FIXP_DBL *RESTRICT mdctData,
-                              const INT blockType,
-                              const INT windowShape,
-                              INT *prevWindowShape,
-                              const INT frameLength,
-                              INT *mdctData_e,
-                              INT filterType
-                             ,FIXP_DBL * RESTRICT overlapAddBuffer
-                             )
-{
-  const INT_PCM * RESTRICT timeData;
-
-  INT i;
-  /* tl: transform length
-     fl: left window slope length
-     nl: left window slope offset
-     fr: right window slope length
-     nr: right window slope offset
-     See FDK_tools/doc/intern/mdct.tex for more detail. */
-  int tl, fl, nl, fr, nr;
+#if defined(__arm__)
+#endif
 
-  const FIXP_WTP * RESTRICT pLeftWindowPart;
-  const FIXP_WTP * RESTRICT pRightWindowPart;
+INT FDKaacEnc_Transform_Real(const INT_PCM *pTimeData,
+                             FIXP_DBL *RESTRICT mdctData, const INT blockType,
+                             const INT windowShape, INT *prevWindowShape,
+                             H_MDCT mdctPers, const INT frameLength,
+                             INT *pMdctData_e, INT filterType) {
+  const INT_PCM *RESTRICT timeData;
 
-  /*
-   * MDCT scale:
-   * + 1: fMultDiv2() in windowing.
-   * + 1: Because of factor 1/2 in Princen-Bradley compliant windowed TDAC.
-   */
-  *mdctData_e = 1+1;
+  UINT numSpec;
+  UINT numMdctLines;
+  UINT offset;
+  int fr; /* fr: right window slope length */
+  SHORT mdctData_e[8];
 
-  tl = frameLength;
   timeData = pTimeData;
 
-  switch( blockType ) {
+  if (blockType == SHORT_WINDOW) {
+    numSpec = 8;
+    numMdctLines = frameLength >> 3;
+  } else {
+    numSpec = 1;
+    numMdctLines = frameLength;
+  }
+
+  offset = (windowShape == LOL_WINDOW) ? ((frameLength * 3) >> 2) : 0;
+  switch (blockType) {
     case LONG_WINDOW:
-      {
-        int offset = (windowShape == LOL_WINDOW) ? ((frameLength * 3)>>2) : 0;
-        fl = frameLength - offset;
-        fr = frameLength - offset;
-      }
-      break;
     case STOP_WINDOW:
-      fl = frameLength >> 3;
-      fr = frameLength;
+      fr = frameLength - offset;
       break;
     case START_WINDOW: /* or StopStartSequence */
-      fl = frameLength;
-      fr = frameLength >> 3;
-      break;
     case SHORT_WINDOW:
-      fl = fr = frameLength >> 3;
-      tl >>= 3;
-      timeData = pTimeData + 3*fl + (fl/2);
+      fr = frameLength >> 3;
       break;
     default:
       FDK_ASSERT(0);
       return -1;
-      break;
   }
 
-  /* Taken from FDK_tools/src/mdct.cpp Derive NR and NL */
-  nr = (tl - fr)>>1;
-  nl = (tl - fl)>>1;
-
-  pLeftWindowPart = FDKgetWindowSlope(fl, *prevWindowShape);
-  pRightWindowPart = FDKgetWindowSlope(fr, windowShape);
-
-  /* windowing */
-  if (filterType != FB_ELD)
-  {
-    /* Left window slope offset */
-    for (i=0; i<nl ; i++)
-    {
-#if SAMPLE_BITS == DFRACT_BITS   /* SPC_BITS and DFRACT_BITS should be equal. */
-      mdctData[(tl/2)+i] = - (FIXP_DBL) timeData[tl-i-1] >> ( 1 );
-#else
-      mdctData[(tl/2)+i] = - (FIXP_DBL) timeData[tl-i-1] << (DFRACT_BITS - SAMPLE_BITS - 1);
-#endif
-    }
-    /* Left window slope */
-    for (i=0; i<fl/2; i++)
-    {
-      FIXP_DBL tmp0;
-      tmp0 = fMultDiv2((FIXP_PCM)timeData[i+nl], pLeftWindowPart[i].v.im);
-      mdctData[(tl/2)+i+nl] = fMultSubDiv2(tmp0, (FIXP_PCM)timeData[tl-nl-i-1], pLeftWindowPart[i].v.re);
-    }
+  mdct_block(mdctPers, timeData, frameLength, mdctData, numSpec, numMdctLines,
+             FDKgetWindowSlope(fr, windowShape), fr, mdctData_e);
 
-    /* Right window slope offset */
-    for(i=0; i<nr; i++)
-    {
-#if SAMPLE_BITS == DFRACT_BITS    /* This should be SPC_BITS instead of DFRACT_BITS. */
-      mdctData[(tl/2)-1-i] = - (FIXP_DBL) timeData[tl+i] >> (1);
-#else
-      mdctData[(tl/2)-1-i] = - (FIXP_DBL) timeData[tl+i] << (DFRACT_BITS - SAMPLE_BITS - 1);
-#endif
-    }
-    /* Right window slope */
-    for (i=0; i<fr/2; i++)
-    {
-      FIXP_DBL tmp1;
-      tmp1 = fMultDiv2((FIXP_PCM)timeData[tl+nr+i], pRightWindowPart[i].v.re);
-      mdctData[(tl/2)-nr-i-1] = -fMultAddDiv2(tmp1, (FIXP_PCM)timeData[(tl*2)-nr-i-1], pRightWindowPart[i].v.im);
+  if (blockType == SHORT_WINDOW) {
+    if (!(mdctData_e[0] == mdctData_e[1] && mdctData_e[1] == mdctData_e[2] &&
+          mdctData_e[2] == mdctData_e[3] && mdctData_e[3] == mdctData_e[4] &&
+          mdctData_e[4] == mdctData_e[5] && mdctData_e[5] == mdctData_e[6] &&
+          mdctData_e[6] == mdctData_e[7])) {
+      return -1;
     }
   }
+  *prevWindowShape = windowShape;
+  *pMdctData_e = mdctData_e[0];
 
-  if (filterType == FB_ELD)
-  {
-    const FIXP_WTB *pWindowELD=NULL;
-    int i, N = frameLength, L = frameLength;
+  return 0;
+}
 
-    if (frameLength == 512) {
-      pWindowELD = ELDAnalysis512;
-    } else {
-      pWindowELD = ELDAnalysis480;
-    }
+INT FDKaacEnc_Transform_Real_Eld(const INT_PCM *pTimeData,
+                                 FIXP_DBL *RESTRICT mdctData,
+                                 const INT blockType, const INT windowShape,
+                                 INT *prevWindowShape, const INT frameLength,
+                                 INT *mdctData_e, INT filterType,
+                                 FIXP_DBL *RESTRICT overlapAddBuffer) {
+  const INT_PCM *RESTRICT timeData;
 
-    for(i=0;i<N/4;i++)
-    {
-      FIXP_DBL z0, outval;
+  INT i;
 
-      z0 = (fMult((FIXP_PCM)timeData[L+N*3/4-1-i], pWindowELD[N/2-1-i])<< (WTS0-1)) + (fMult((FIXP_PCM)timeData[L+N*3/4+i], pWindowELD[N/2+i])<< (WTS0-1));
+  /* tl: transform length
+     fl: left window slope length
+     nl: left window slope offset
+     fr: right window slope length
+     nr: right window slope offset */
+  const FIXP_WTB *pWindowELD = NULL;
+  int N = frameLength;
+  int L = frameLength;
 
-      outval  = (fMultDiv2((FIXP_PCM)timeData[L+N*3/4-1-i], pWindowELD[N+N/2-1-i]) >> (-WTS1));
-      outval += (fMultDiv2((FIXP_PCM)timeData[L+N*3/4+i], pWindowELD[N+N/2+i]) >> (-WTS1) );
-      outval += (fMultDiv2(overlapAddBuffer[N/2+i], pWindowELD[2*N+i])>> (-WTS2-1));
+  timeData = pTimeData;
 
-      overlapAddBuffer[N/2+i] = overlapAddBuffer[i];
+  if (blockType != LONG_WINDOW) {
+    return -1;
+  }
 
-      overlapAddBuffer[i] = z0;
-      mdctData[i] = overlapAddBuffer[N/2+i] + (fMultDiv2(overlapAddBuffer[N+N/2-1-i], pWindowELD[2*N+N/2+i]) >> (-WTS2-1));
+  /*
+   * MDCT scale:
+   * + 1: fMultDiv2() in windowing.
+   * + 1: Because of factor 1/2 in Princen-Bradley compliant windowed TDAC.
+   */
+  *mdctData_e = 1 + 1;
 
-      mdctData[N-1-i] = outval;
-      overlapAddBuffer[N+N/2-1-i] = outval;
-    }
+  switch (frameLength) {
+    case 512:
+      pWindowELD = ELDAnalysis512;
+      break;
+    case 480:
+      pWindowELD = ELDAnalysis480;
+      break;
+    case 256:
+      pWindowELD = ELDAnalysis256;
+      *mdctData_e += 1;
+      break;
+    case 240:
+      pWindowELD = ELDAnalysis240;
+      *mdctData_e += 1;
+      break;
+    case 128:
+      pWindowELD = ELDAnalysis128;
+      *mdctData_e += 2;
+      break;
+    case 120:
+      pWindowELD = ELDAnalysis120;
+      *mdctData_e += 2;
+      break;
+    default:
+      FDK_ASSERT(0);
+      return -1;
+  }
+
+  for (i = 0; i < N / 4; i++) {
+    FIXP_DBL z0, outval;
+
+    z0 = (fMult((FIXP_PCM)timeData[L + N * 3 / 4 - 1 - i],
+                pWindowELD[N / 2 - 1 - i])
+          << (WTS0 - 1)) +
+         (fMult((FIXP_PCM)timeData[L + N * 3 / 4 + i], pWindowELD[N / 2 + i])
+          << (WTS0 - 1));
+
+    outval = (fMultDiv2((FIXP_PCM)timeData[L + N * 3 / 4 - 1 - i],
+                        pWindowELD[N + N / 2 - 1 - i]) >>
+              (-WTS1));
+    outval += (fMultDiv2((FIXP_PCM)timeData[L + N * 3 / 4 + i],
+                         pWindowELD[N + N / 2 + i]) >>
+               (-WTS1));
+    outval += (fMultDiv2(overlapAddBuffer[N / 2 + i], pWindowELD[2 * N + i]) >>
+               (-WTS2 - 1));
+
+    overlapAddBuffer[N / 2 + i] = overlapAddBuffer[i];
+
+    overlapAddBuffer[i] = z0;
+    mdctData[i] = overlapAddBuffer[N / 2 + i] +
+                  (fMultDiv2(overlapAddBuffer[N + N / 2 - 1 - i],
+                             pWindowELD[2 * N + N / 2 + i]) >>
+                   (-WTS2 - 1));
+
+    mdctData[N - 1 - i] = outval;
+    overlapAddBuffer[N + N / 2 - 1 - i] = outval;
+  }
 
-    for(i=N/4;i<N/2;i++)
-    {
-      FIXP_DBL z0, outval;
+  for (i = N / 4; i < N / 2; i++) {
+    FIXP_DBL z0, outval;
 
-      z0 = fMult((FIXP_PCM)timeData[L+N*3/4-1-i], pWindowELD[N/2-1-i]) << (WTS0-1);
+    z0 = fMult((FIXP_PCM)timeData[L + N * 3 / 4 - 1 - i],
+               pWindowELD[N / 2 - 1 - i])
+         << (WTS0 - 1);
 
-      outval  = (fMultDiv2((FIXP_PCM)timeData[L+N*3/4-1-i], pWindowELD[N+N/2-1-i]) >> (-WTS1)) ;
-      outval += (fMultDiv2(overlapAddBuffer[N/2+i], pWindowELD[2*N+i]) >> (-WTS2-1));
+    outval = (fMultDiv2((FIXP_PCM)timeData[L + N * 3 / 4 - 1 - i],
+                        pWindowELD[N + N / 2 - 1 - i]) >>
+              (-WTS1));
+    outval += (fMultDiv2(overlapAddBuffer[N / 2 + i], pWindowELD[2 * N + i]) >>
+               (-WTS2 - 1));
 
-      overlapAddBuffer[N/2+i] = overlapAddBuffer[i] + (fMult((FIXP_PCM)timeData[L-N/4+i], pWindowELD[N/2+i])<< (WTS0-1) );
+    overlapAddBuffer[N / 2 + i] =
+        overlapAddBuffer[i] +
+        (fMult((FIXP_PCM)timeData[L - N / 4 + i], pWindowELD[N / 2 + i])
+         << (WTS0 - 1));
 
-      overlapAddBuffer[i] = z0;
-      mdctData[i] = overlapAddBuffer[N/2+i] + (fMultDiv2(overlapAddBuffer[N+N/2-1-i], pWindowELD[2*N+N/2+i]) >> (-WTS2-1));
+    overlapAddBuffer[i] = z0;
+    mdctData[i] = overlapAddBuffer[N / 2 + i] +
+                  (fMultDiv2(overlapAddBuffer[N + N / 2 - 1 - i],
+                             pWindowELD[2 * N + N / 2 + i]) >>
+                   (-WTS2 - 1));
 
-      mdctData[N-1-i] = outval;
-      overlapAddBuffer[N+N/2-1-i] = outval;
-    }
+    mdctData[N - 1 - i] = outval;
+    overlapAddBuffer[N + N / 2 - 1 - i] = outval;
   }
-
-  dct_IV(mdctData, tl, mdctData_e);
+  dct_IV(mdctData, frameLength, mdctData_e);
 
   *prevWindowShape = windowShape;
 
   return 0;
 }
-