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, 445 insertions, 0 deletions

diff --git a/libDRCdec/src/drcDec_gainDecoder.cpp b/libDRCdec/src/drcDec_gainDecoder.cpp
new file mode 100644
index 0000000..ca81fad
--- /dev/null
+++ b/libDRCdec/src/drcDec_gainDecoder.cpp
@@ -0,0 +1,445 @@
+/* -----------------------------------------------------------------------------
+Software License for The Fraunhofer FDK AAC Codec Library for Android
+
+© Copyright  1995 - 2018 Fraunhofer-Gesellschaft zur Förderung der angewandten
+Forschung e.V. All rights reserved.
+
+ 1.    INTRODUCTION
+The Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software
+that implements the MPEG Advanced Audio Coding ("AAC") encoding and decoding
+scheme for digital audio. This FDK AAC Codec software is intended to be used on
+a wide variety of Android devices.
+
+AAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient
+general perceptual audio codecs. AAC-ELD is considered the best-performing
+full-bandwidth communications codec by independent studies and is widely
+deployed. AAC has been standardized by ISO and IEC as part of the MPEG
+specifications.
+
+Patent licenses for necessary patent claims for the FDK AAC Codec (including
+those of Fraunhofer) may be obtained through Via Licensing
+(www.vialicensing.com) or through the respective patent owners individually for
+the purpose of encoding or decoding bit streams in products that are compliant
+with the ISO/IEC MPEG audio standards. Please note that most manufacturers of
+Android devices already license these patent claims through Via Licensing or
+directly from the patent owners, and therefore FDK AAC Codec software may
+already be covered under those patent licenses when it is used for those
+licensed purposes only.
+
+Commercially-licensed AAC software libraries, including floating-point versions
+with enhanced sound quality, are also available from Fraunhofer. Users are
+encouraged to check the Fraunhofer website for additional applications
+information and documentation.
+
+2.    COPYRIGHT LICENSE
+
+Redistribution and use in source and binary forms, with or without modification,
+are permitted without payment of copyright license fees provided that you
+satisfy the following conditions:
+
+You must retain the complete text of this software license in redistributions of
+the FDK AAC Codec or your modifications thereto in source code form.
+
+You must retain the complete text of this software license in the documentation
+and/or other materials provided with redistributions of the FDK AAC Codec or
+your modifications thereto in binary form. You must make available free of
+charge copies of the complete source code of the FDK AAC Codec and your
+modifications thereto to recipients of copies in binary form.
+
+The name of Fraunhofer may not be used to endorse or promote products derived
+from this library without prior written permission.
+
+You may not charge copyright license fees for anyone to use, copy or distribute
+the FDK AAC Codec software or your modifications thereto.
+
+Your modified versions of the FDK AAC Codec must carry prominent notices stating
+that you changed the software and the date of any change. For modified versions
+of the FDK AAC Codec, the term "Fraunhofer FDK AAC Codec Library for Android"
+must be replaced by the term "Third-Party Modified Version of the Fraunhofer FDK
+AAC Codec Library for Android."
+
+3.    NO PATENT LICENSE
+
+NO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without
+limitation the patents of Fraunhofer, ARE GRANTED BY THIS SOFTWARE LICENSE.
+Fraunhofer provides no warranty of patent non-infringement with respect to this
+software.
+
+You may use this FDK AAC Codec software or modifications thereto only for
+purposes that are authorized by appropriate patent licenses.
+
+4.    DISCLAIMER
+
+This FDK AAC Codec software is provided by Fraunhofer on behalf of the copyright
+holders and contributors "AS IS" and WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES,
+including but not limited to the implied warranties of merchantability and
+fitness for a particular purpose. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
+CONTRIBUTORS BE LIABLE for any direct, indirect, incidental, special, exemplary,
+or consequential damages, including but not limited to procurement of substitute
+goods or services; loss of use, data, or profits, or business interruption,
+however caused and on any theory of liability, whether in contract, strict
+liability, or tort (including negligence), arising in any way out of the use of
+this software, even if advised of the possibility of such damage.
+
+5.    CONTACT INFORMATION
+
+Fraunhofer Institute for Integrated Circuits IIS
+Attention: Audio and Multimedia Departments - FDK AAC LL
+Am Wolfsmantel 33
+91058 Erlangen, Germany
+
+www.iis.fraunhofer.de/amm
+amm-info@iis.fraunhofer.de
+----------------------------------------------------------------------------- */
+
+/************************* MPEG-D DRC decoder library **************************
+
+   Author(s):
+
+   Description:
+
+*******************************************************************************/
+
+#include "drcDec_types.h"
+#include "drcDec_gainDecoder.h"
+#include "drcGainDec_preprocess.h"
+#include "drcGainDec_init.h"
+#include "drcGainDec_process.h"
+#include "drcDec_tools.h"
+
+/*******************************************/
+/* static functions                        */
+/*******************************************/
+
+static int _fitsLocation(DRC_INSTRUCTIONS_UNI_DRC* pInst,
+                         const GAIN_DEC_LOCATION drcLocation) {
+  int downmixId = pInst->drcApplyToDownmix ? pInst->downmixId[0] : 0;
+  switch (drcLocation) {
+    case GAIN_DEC_DRC1:
+      return (downmixId == 0);
+    case GAIN_DEC_DRC1_DRC2:
+      return ((downmixId == 0) || (downmixId == DOWNMIX_ID_ANY_DOWNMIX));
+    case GAIN_DEC_DRC2:
+      return (downmixId == DOWNMIX_ID_ANY_DOWNMIX);
+    case GAIN_DEC_DRC3:
+      return ((downmixId != 0) && (downmixId != DOWNMIX_ID_ANY_DOWNMIX));
+    case GAIN_DEC_DRC2_DRC3:
+      return (downmixId != 0);
+  }
+  return 0;
+}
+
+static void _setChannelGains(HANDLE_DRC_GAIN_DECODER hGainDec,
+                             const int numChannelGains,
+                             const FIXP_DBL* channelGainDb) {
+  int i, channelGain_e;
+  FIXP_DBL channelGain;
+  FDK_ASSERT(numChannelGains <= 8);
+  for (i = 0; i < numChannelGains; i++) {
+    if (channelGainDb[i] == (FIXP_DBL)MINVAL_DBL) {
+      hGainDec->channelGain[i] = (FIXP_DBL)0;
+    } else {
+      /* add loudness normalisation gain (dB) to channel gain (dB) */
+      FIXP_DBL tmp_channelGainDb = (channelGainDb[i] >> 1) +
+                                   (hGainDec->loudnessNormalisationGainDb >> 2);
+      tmp_channelGainDb =
+          SATURATE_LEFT_SHIFT(tmp_channelGainDb, 1, DFRACT_BITS);
+      channelGain = dB2lin(tmp_channelGainDb, 8, &channelGain_e);
+      hGainDec->channelGain[i] = scaleValue(channelGain, channelGain_e - 8);
+    }
+  }
+}
+
+/*******************************************/
+/* public functions                        */
+/*******************************************/
+
+DRC_ERROR
+drcDec_GainDecoder_Open(HANDLE_DRC_GAIN_DECODER* phGainDec) {
+  DRC_GAIN_DECODER* hGainDec = NULL;
+
+  hGainDec = (DRC_GAIN_DECODER*)FDKcalloc(1, sizeof(DRC_GAIN_DECODER));
+  if (hGainDec == NULL) return DE_MEMORY_ERROR;
+
+  hGainDec->multiBandActiveDrcIndex = -1;
+  hGainDec->channelGainActiveDrcIndex = -1;
+
+  *phGainDec = hGainDec;
+
+  return DE_OK;
+}
+
+DRC_ERROR
+drcDec_GainDecoder_Init(HANDLE_DRC_GAIN_DECODER hGainDec, const int frameSize,
+                        const int sampleRate) {
+  DRC_ERROR err = DE_OK;
+
+  err = initGainDec(hGainDec, frameSize, sampleRate);
+  if (err) return err;
+
+  initDrcGainBuffers(hGainDec->frameSize, &hGainDec->drcGainBuffers);
+
+  return err;
+}
+
+DRC_ERROR
+drcDec_GainDecoder_SetCodecDependentParameters(
+    HANDLE_DRC_GAIN_DECODER hGainDec, const DELAY_MODE delayMode,
+    const int timeDomainSupported,
+    const SUBBAND_DOMAIN_MODE subbandDomainSupported) {
+  if ((delayMode != DM_REGULAR_DELAY) && (delayMode != DM_LOW_DELAY)) {
+    return DE_NOT_OK;
+  }
+  hGainDec->delayMode = delayMode;
+  hGainDec->timeDomainSupported = timeDomainSupported;
+  hGainDec->subbandDomainSupported = subbandDomainSupported;
+
+  return DE_OK;
+}
+
+DRC_ERROR
+drcDec_GainDecoder_Config(HANDLE_DRC_GAIN_DECODER hGainDec,
+                          HANDLE_UNI_DRC_CONFIG hUniDrcConfig,
+                          const UCHAR numSelectedDrcSets,
+                          const SCHAR* selectedDrcSetIds,
+                          const UCHAR* selectedDownmixIds) {
+  DRC_ERROR err = DE_OK;
+  int a;
+
+  hGainDec->nActiveDrcs = 0;
+  hGainDec->multiBandActiveDrcIndex = -1;
+  hGainDec->channelGainActiveDrcIndex = -1;
+  for (a = 0; a < numSelectedDrcSets; a++) {
+    err = initActiveDrc(hGainDec, hUniDrcConfig, selectedDrcSetIds[a],
+                        selectedDownmixIds[a]);
+    if (err) return err;
+  }
+
+  err = initActiveDrcOffset(hGainDec);
+  if (err) return err;
+
+  return err;
+}
+
+DRC_ERROR
+drcDec_GainDecoder_Close(HANDLE_DRC_GAIN_DECODER* phGainDec) {
+  if (*phGainDec != NULL) {
+    FDKfree(*phGainDec);
+    *phGainDec = NULL;
+  }
+
+  return DE_OK;
+}
+
+DRC_ERROR
+drcDec_GainDecoder_Preprocess(HANDLE_DRC_GAIN_DECODER hGainDec,
+                              HANDLE_UNI_DRC_GAIN hUniDrcGain,
+                              const FIXP_DBL loudnessNormalizationGainDb,
+                              const FIXP_SGL boost, const FIXP_SGL compress) {
+  DRC_ERROR err = DE_OK;
+  int a, c;
+
+  /* lnbPointer is the index on the most recent node buffer */
+  hGainDec->drcGainBuffers.lnbPointer++;
+  if (hGainDec->drcGainBuffers.lnbPointer >= NUM_LNB_FRAMES)
+    hGainDec->drcGainBuffers.lnbPointer = 0;
+
+  for (a = 0; a < hGainDec->nActiveDrcs; a++) {
+    /* prepare gain interpolation of sequences used by copying and modifying
+     * nodes in node buffers */
+    err = prepareDrcGain(hGainDec, hUniDrcGain, compress, boost,
+                         loudnessNormalizationGainDb, a);
+    if (err) return err;
+  }
+
+  for (a = 0; a < MAX_ACTIVE_DRCS; a++) {
+    for (c = 0; c < 8; c++) {
+      hGainDec->activeDrc[a]
+          .lnbIndexForChannel[c][hGainDec->drcGainBuffers.lnbPointer] =
+          -1; /* "no DRC processing" */
+    }
+    hGainDec->activeDrc[a].subbandGainsReady = 0;
+  }
+
+  for (c = 0; c < 8; c++) {
+    hGainDec->drcGainBuffers
+        .channelGain[c][hGainDec->drcGainBuffers.lnbPointer] =
+        FL2FXCONST_DBL(1.0f / (float)(1 << 8));
+  }
+
+  return err;
+}
+
+/* create gain sequence out of gain sequences of last frame for concealment and
+ * flushing */
+DRC_ERROR
+drcDec_GainDecoder_Conceal(HANDLE_DRC_GAIN_DECODER hGainDec,
+                           HANDLE_UNI_DRC_CONFIG hUniDrcConfig,
+                           HANDLE_UNI_DRC_GAIN hUniDrcGain) {
+  int seq, gainSequenceCount;
+  DRC_COEFFICIENTS_UNI_DRC* pCoef =
+      selectDrcCoefficients(hUniDrcConfig, LOCATION_SELECTED);
+  if (pCoef == NULL) return DE_OK;
+
+  gainSequenceCount = fMin(pCoef->gainSequenceCount, (UCHAR)12);
+
+  for (seq = 0; seq < gainSequenceCount; seq++) {
+    int lastNodeIndex = 0;
+    FIXP_SGL lastGainDb = (FIXP_SGL)0;
+
+    lastNodeIndex = hUniDrcGain->nNodes[seq] - 1;
+    if ((lastNodeIndex >= 0) && (lastNodeIndex < 16)) {
+      lastGainDb = hUniDrcGain->gainNode[seq][lastNodeIndex].gainDb;
+    }
+
+    hUniDrcGain->nNodes[seq] = 1;
+    if (lastGainDb > (FIXP_SGL)0) {
+      hUniDrcGain->gainNode[seq][0].gainDb =
+          FX_DBL2FX_SGL(fMult(FL2FXCONST_SGL(0.9f), lastGainDb));
+    } else {
+      hUniDrcGain->gainNode[seq][0].gainDb =
+          FX_DBL2FX_SGL(fMult(FL2FXCONST_SGL(0.98f), lastGainDb));
+    }
+    hUniDrcGain->gainNode[seq][0].time = hGainDec->frameSize - 1;
+  }
+  return DE_OK;
+}
+
+void drcDec_GainDecoder_SetChannelGains(HANDLE_DRC_GAIN_DECODER hGainDec,
+                                        const int numChannels,
+                                        const int frameSize,
+                                        const FIXP_DBL* channelGainDb,
+                                        const int audioBufferChannelOffset,
+                                        FIXP_DBL* audioBuffer) {
+  int c, i;
+
+  if (hGainDec->channelGainActiveDrcIndex >= 0) {
+    /* channel gains will be applied in drcDec_GainDecoder_ProcessTimeDomain or
+     * drcDec_GainDecoder_ProcessSubbandDomain, respectively. */
+    _setChannelGains(hGainDec, numChannels, channelGainDb);
+
+    if (!hGainDec->status) { /* overwrite previous channel gains at startup */
+      DRC_GAIN_BUFFERS* pDrcGainBuffers = &hGainDec->drcGainBuffers;
+      for (c = 0; c < numChannels; c++) {
+        for (i = 0; i < NUM_LNB_FRAMES; i++) {
+          pDrcGainBuffers->channelGain[c][i] = hGainDec->channelGain[c];
+        }
+      }
+      hGainDec->status = 1;
+    }
+  } else {
+    /* smooth and apply channel gains */
+    FIXP_DBL prevChannelGain[8];
+    for (c = 0; c < numChannels; c++) {
+      prevChannelGain[c] = hGainDec->channelGain[c];
+    }
+
+    _setChannelGains(hGainDec, numChannels, channelGainDb);
+
+    if (!hGainDec->status) { /* overwrite previous channel gains at startup */
+      for (c = 0; c < numChannels; c++)
+        prevChannelGain[c] = hGainDec->channelGain[c];
+      hGainDec->status = 1;
+    }
+
+    for (c = 0; c < numChannels; c++) {
+      INT n_min = fMin(fMin(CntLeadingZeros(prevChannelGain[c]),
+                            CntLeadingZeros(hGainDec->channelGain[c])) -
+                           1,
+                       9);
+      FIXP_DBL gain = prevChannelGain[c] << n_min;
+      FIXP_DBL stepsize = ((hGainDec->channelGain[c] << n_min) - gain);
+      if (stepsize != (FIXP_DBL)0) {
+        if (frameSize == 1024)
+          stepsize = stepsize >> 10;
+        else
+          stepsize = (LONG)stepsize / frameSize;
+      }
+      n_min = 9 - n_min;
+#ifdef FUNCTION_drcDec_GainDecoder_SetChannelGains_func1
+      drcDec_GainDecoder_SetChannelGains_func1(audioBuffer, gain, stepsize,
+                                               n_min, frameSize);
+#else
+      for (i = 0; i < frameSize; i++) {
+        audioBuffer[i] = fMultDiv2(audioBuffer[i], gain) << n_min;
+        gain += stepsize;
+      }
+#endif
+      audioBuffer += audioBufferChannelOffset;
+    }
+  }
+}
+
+DRC_ERROR
+drcDec_GainDecoder_ProcessTimeDomain(
+    HANDLE_DRC_GAIN_DECODER hGainDec, const int delaySamples,
+    const GAIN_DEC_LOCATION drcLocation, const int channelOffset,
+    const int drcChannelOffset, const int numChannelsProcessed,
+    const int timeDataChannelOffset, FIXP_DBL* audioIOBuffer) {
+  DRC_ERROR err = DE_OK;
+  int a;
+
+  if (!hGainDec->timeDomainSupported) {
+    return DE_NOT_OK;
+  }
+
+  for (a = 0; a < hGainDec->nActiveDrcs; a++) {
+    if (!_fitsLocation(hGainDec->activeDrc[a].pInst, drcLocation)) continue;
+
+    /* Apply DRC */
+    err = processDrcTime(hGainDec, a, delaySamples, channelOffset,
+                         drcChannelOffset, numChannelsProcessed,
+                         timeDataChannelOffset, audioIOBuffer);
+    if (err) return err;
+  }
+
+  return err;
+}
+
+DRC_ERROR
+drcDec_GainDecoder_ProcessSubbandDomain(
+    HANDLE_DRC_GAIN_DECODER hGainDec, const int delaySamples,
+    const GAIN_DEC_LOCATION drcLocation, const int channelOffset,
+    const int drcChannelOffset, const int numChannelsProcessed,
+    const int processSingleTimeslot, FIXP_DBL* audioIOBufferReal[],
+    FIXP_DBL* audioIOBufferImag[]) {
+  DRC_ERROR err = DE_OK;
+  int a;
+
+  if (hGainDec->subbandDomainSupported == SDM_OFF) {
+    return DE_NOT_OK;
+  }
+
+  for (a = 0; a < hGainDec->nActiveDrcs; a++) {
+    if (!_fitsLocation(hGainDec->activeDrc[a].pInst, drcLocation)) continue;
+
+    /* Apply DRC */
+    err = processDrcSubband(hGainDec, a, delaySamples, channelOffset,
+                            drcChannelOffset, numChannelsProcessed,
+                            processSingleTimeslot, audioIOBufferReal,
+                            audioIOBufferImag);
+    if (err) return err;
+  }
+
+  return err;
+}
+
+DRC_ERROR
+drcDec_GainDecoder_SetLoudnessNormalizationGainDb(
+    HANDLE_DRC_GAIN_DECODER hGainDec, FIXP_DBL loudnessNormalizationGainDb) {
+  hGainDec->loudnessNormalisationGainDb = loudnessNormalizationGainDb;
+
+  return DE_OK;
+}
+
+int drcDec_GainDecoder_GetFrameSize(HANDLE_DRC_GAIN_DECODER hGainDec) {
+  if (hGainDec == NULL) return -1;
+
+  return hGainDec->frameSize;
+}
+
+int drcDec_GainDecoder_GetDeltaTminDefault(HANDLE_DRC_GAIN_DECODER hGainDec) {
+  if (hGainDec == NULL) return -1;
+
+  return hGainDec->deltaTminDefault;
+}