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, 195 insertions, 147 deletions

diff --git a/libPCMutils/include/limiter.h b/libPCMutils/include/limiter.h
index 0d3d701..fab7226 100644
--- a/libPCMutils/include/limiter.h
+++ b/libPCMutils/include/limiter.h
@@ -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
 
@@ -79,34 +90,53 @@ Am Wolfsmantel 33
 
 www.iis.fraunhofer.de/amm
 amm-info@iis.fraunhofer.de
------------------------------------------------------------------------------------------------------------ */
+----------------------------------------------------------------------------- */
 
-/************************  FDK PCM postprocessor module  *********************
+/**************************** PCM utility library ******************************
 
    Author(s):   Matthias Neusinger
+
    Description: Hard limiter for clipping prevention
 
 *******************************************************************************/
 
-#ifndef _LIMITER_H_
-#define _LIMITER_H_
-
+#ifndef LIMITER_H
+#define LIMITER_H
 
 #include "common_fix.h"
+#include "FDK_audio.h"
 
-#define TDL_ATTACK_DEFAULT_MS      (15)              /* default attack  time in ms */
-#define TDL_RELEASE_DEFAULT_MS     (50)              /* default release time in ms */
-
-#define TDL_GAIN_SCALING           (15)              /* scaling of gain value. */
+#define TDL_ATTACK_DEFAULT_MS (15)  /* default attack  time in ms */
+#define TDL_RELEASE_DEFAULT_MS (50) /* default release time in ms */
 
+#define TDL_GAIN_SCALING (15) /* scaling of gain value. */
 
 #ifdef __cplusplus
 extern "C" {
 #endif
 
+struct TDLimiter {
+  unsigned int attack;
+  FIXP_DBL attackConst, releaseConst;
+  unsigned int attackMs, releaseMs, maxAttackMs;
+  FIXP_DBL threshold;
+  unsigned int channels, maxChannels;
+  UINT sampleRate, maxSampleRate;
+  FIXP_DBL cor, max;
+  FIXP_DBL* maxBuf;
+  FIXP_DBL* delayBuf;
+  unsigned int maxBufIdx, delayBufIdx;
+  FIXP_DBL smoothState0;
+  FIXP_DBL minGain;
+
+  FIXP_DBL additionalGainPrev;
+  FIXP_DBL additionalGainFilterState;
+  FIXP_DBL additionalGainFilterState1;
+};
 
 typedef enum {
   TDLIMIT_OK = 0,
+  TDLIMIT_UNKNOWN = -1,
 
   __error_codes_start = -100,
 
@@ -119,115 +149,133 @@ typedef enum {
 struct TDLimiter;
 typedef struct TDLimiter* TDLimiterPtr;
 
-/******************************************************************************
-* createLimiter                                                               *
-* maxAttackMs:   maximum and initial attack/lookahead time in milliseconds    *
-* releaseMs:     release time in milliseconds (90% time constant)             *
-* threshold:     limiting threshold                                           *
-* maxChannels:   maximum and initial number of channels                       *
-* maxSampleRate: maximum and initial sampling rate in Hz                      *
-* returns:       limiter handle                                               *
-******************************************************************************/
-TDLimiterPtr createLimiter(unsigned int  maxAttackMs,
-                           unsigned int  releaseMs,
-                           INT_PCM       threshold,
-                           unsigned int  maxChannels,
-                           unsigned int  maxSampleRate);
+#define PCM_LIM LONG
+#define FIXP_DBL2PCM_LIM(x) (x)
+#define PCM_LIM2FIXP_DBL(x) (x)
+#define PCM_LIM_BITS 32
+#define FIXP_PCM_LIM FIXP_DBL
 
+#define SAMPLE_BITS_LIM DFRACT_BITS
 
 /******************************************************************************
-* resetLimiter                                                                *
-* limiter: limiter handle                                                     *
-* returns: error code                                                         *
-******************************************************************************/
-TDLIMITER_ERROR resetLimiter(TDLimiterPtr limiter);
-
+ * pcmLimiter_Reset                                                            *
+ * limiter: limiter handle                                                     *
+ * returns: error code                                                         *
+ ******************************************************************************/
+TDLIMITER_ERROR pcmLimiter_Reset(TDLimiterPtr limiter);
 
 /******************************************************************************
-* destroyLimiter                                                              *
-* limiter: limiter handle                                                     *
-* returns: error code                                                         *
-******************************************************************************/
-TDLIMITER_ERROR destroyLimiter(TDLimiterPtr limiter);
+ * pcmLimiter_Destroy                                                          *
+ * limiter: limiter handle                                                     *
+ * returns: error code                                                         *
+ ******************************************************************************/
+TDLIMITER_ERROR pcmLimiter_Destroy(TDLimiterPtr limiter);
 
 /******************************************************************************
-* applyLimiter                                                                *
-* limiter:    limiter handle                                                  *
-* pGain :     pointer to gains to be applied to the signal before limiting,   *
-*             which are downscaled by TDL_GAIN_SCALING bit.                   *
-*             These gains are delayed by gain_delay, and smoothed.            *
-*             Smoothing is done by a butterworth lowpass filter with a cutoff *
-*             frequency which is fixed with respect to the sampling rate.     *
-*             It is a substitute for the smoothing due to windowing and       *
-*             overlap/add, if a gain is applied in frequency domain.          *
-* gain_scale: pointer to scaling exponents to be applied to the signal before *
-*             limiting, without delay and without smoothing                   *
-* gain_size:  number of elements in pGain, currently restricted to 1          *
-* gain_delay: delay [samples] with which the gains in pGain shall be applied  *
-*             gain_delay <= nSamples                                          *
-* samples:    input/output buffer containing interleaved samples              *
-*             precision of output will be DFRACT_BITS-TDL_GAIN_SCALING bits   *
-* nSamples:   number of samples per channel                                   *
-* returns:    error code                                                      *
-******************************************************************************/
-TDLIMITER_ERROR applyLimiter(TDLimiterPtr limiter,
-                 INT_PCM*    samples,
-                 FIXP_DBL*    pGain,
-                 const INT*   gain_scale,
-                 const UINT   gain_size,
-                 const UINT   gain_delay,
-                 const UINT   nSamples);
+ * pcmLimiter_GetDelay                                                         *
+ * limiter: limiter handle                                                     *
+ * returns: exact delay caused by the limiter in samples per channel           *
+ ******************************************************************************/
+unsigned int pcmLimiter_GetDelay(TDLimiterPtr limiter);
 
 /******************************************************************************
-* getLimiterDelay                                                             *
-* limiter: limiter handle                                                     *
-* returns: exact delay caused by the limiter in samples                       *
-******************************************************************************/
-unsigned int getLimiterDelay(TDLimiterPtr limiter);
+ * pcmLimiter_GetMaxGainReduction                                              *
+ * limiter: limiter handle                                                     *
+ * returns: maximum gain reduction in last processed block in dB               *
+ ******************************************************************************/
+INT pcmLimiter_GetMaxGainReduction(TDLimiterPtr limiter);
 
 /******************************************************************************
-* setLimiterNChannels                                                         *
-* limiter:   limiter handle                                                   *
-* nChannels: number of channels ( <= maxChannels specified on create)         *
-* returns:   error code                                                       *
-******************************************************************************/
-TDLIMITER_ERROR setLimiterNChannels(TDLimiterPtr limiter, unsigned int nChannels);
+ * pcmLimiter_SetNChannels                                                     *
+ * limiter:   limiter handle                                                   *
+ * nChannels: number of channels ( <= maxChannels specified on create)         *
+ * returns:   error code                                                       *
+ ******************************************************************************/
+TDLIMITER_ERROR pcmLimiter_SetNChannels(TDLimiterPtr limiter,
+                                        unsigned int nChannels);
 
 /******************************************************************************
-* setLimiterSampleRate                                                        *
-* limiter:    limiter handle                                                  *
-* sampleRate: sampling rate in Hz ( <= maxSampleRate specified on create)     *
-* returns:    error code                                                      *
-******************************************************************************/
-TDLIMITER_ERROR setLimiterSampleRate(TDLimiterPtr limiter, unsigned int sampleRate);
+ * pcmLimiter_SetSampleRate                                                    *
+ * limiter:    limiter handle                                                  *
+ * sampleRate: sampling rate in Hz ( <= maxSampleRate specified on create)     *
+ * returns:    error code                                                      *
+ ******************************************************************************/
+TDLIMITER_ERROR pcmLimiter_SetSampleRate(TDLimiterPtr limiter, UINT sampleRate);
 
 /******************************************************************************
-* setLimiterAttack                                                            *
-* limiter:    limiter handle                                                  *
-* attackMs:   attack time in ms ( <= maxAttackMs specified on create)         *
-* returns:    error code                                                      *
-******************************************************************************/
-TDLIMITER_ERROR setLimiterAttack(TDLimiterPtr limiter, unsigned int attackMs);
+ * pcmLimiter_SetAttack                                                        *
+ * limiter:    limiter handle                                                  *
+ * attackMs:   attack time in ms ( <= maxAttackMs specified on create)         *
+ * returns:    error code                                                      *
+ ******************************************************************************/
+TDLIMITER_ERROR pcmLimiter_SetAttack(TDLimiterPtr limiter,
+                                     unsigned int attackMs);
 
 /******************************************************************************
-* setLimiterRelease                                                           *
-* limiter:    limiter handle                                                  *
-* releaseMs:  release time in ms                                              *
-* returns:    error code                                                      *
-******************************************************************************/
-TDLIMITER_ERROR setLimiterRelease(TDLimiterPtr limiter, unsigned int releaseMs);
+ * pcmLimiter_SetRelease                                                       *
+ * limiter:    limiter handle                                                  *
+ * releaseMs:  release time in ms                                              *
+ * returns:    error code                                                      *
+ ******************************************************************************/
+TDLIMITER_ERROR pcmLimiter_SetRelease(TDLimiterPtr limiter,
+                                      unsigned int releaseMs);
 
 /******************************************************************************
-* setLimiterThreshold                                                         *
-* limiter:    limiter handle                                                  *
-* threshold:  limiter threshold                                               *
-* returns:    error code                                                      *
-******************************************************************************/
-TDLIMITER_ERROR setLimiterThreshold(TDLimiterPtr limiter, INT_PCM threshold);
+ * pcmLimiter_GetLibInfo                                                       *
+ * info:       pointer to an allocated and initialized LIB_INFO structure      *
+ * returns:    error code                                                      *
+ ******************************************************************************/
+TDLIMITER_ERROR pcmLimiter_GetLibInfo(LIB_INFO* info);
 
 #ifdef __cplusplus
 }
 #endif
 
+/******************************************************************************
+ * pcmLimiter_Create                                                           *
+ * maxAttackMs:   maximum and initial attack/lookahead time in milliseconds    *
+ * releaseMs:     release time in milliseconds (90% time constant)             *
+ * threshold:     limiting threshold                                           *
+ * maxChannels:   maximum and initial number of channels                       *
+ * maxSampleRate: maximum and initial sampling rate in Hz                      *
+ * returns:       limiter handle                                               *
+ ******************************************************************************/
+TDLimiterPtr pcmLimiter_Create(unsigned int maxAttackMs, unsigned int releaseMs,
+                               FIXP_DBL threshold, unsigned int maxChannels,
+                               UINT maxSampleRate);
 
-#endif  //#ifndef _LIMITER_H_
+/******************************************************************************
+ * pcmLimiter_SetThreshold                                                     *
+ * limiter:    limiter handle                                                  *
+ * threshold:  limiter threshold                                               *
+ * returns:    error code                                                      *
+ ******************************************************************************/
+TDLIMITER_ERROR pcmLimiter_SetThreshold(TDLimiterPtr limiter,
+                                        FIXP_DBL threshold);
+
+/******************************************************************************
+ * pcmLimiter_Apply                                                            *
+ * limiter:    limiter handle                                                  *
+ * pGain :     pointer to gains to be applied to the signal before limiting,   *
+ *             which are downscaled by TDL_GAIN_SCALING bit.                   *
+ *             These gains are delayed by gain_delay, and smoothed.            *
+ *             Smoothing is done by a butterworth lowpass filter with a cutoff *
+ *             frequency which is fixed with respect to the sampling rate.     *
+ *             It is a substitute for the smoothing due to windowing and       *
+ *             overlap/add, if a gain is applied in frequency domain.          *
+ * gain_scale: pointer to scaling exponents to be applied to the signal before *
+ *             limiting, without delay and without smoothing                   *
+ * gain_size:  number of elements in pGain, currently restricted to 1          *
+ * gain_delay: delay [samples] with which the gains in pGain shall be applied  *
+ *             gain_delay <= nSamples                                          *
+ * samples:    input/output buffer containing interleaved samples              *
+ *             precision of output will be DFRACT_BITS-TDL_GAIN_SCALING bits   *
+ * nSamples:   number of samples per channel                                   *
+ * returns:    error code                                                      *
+ ******************************************************************************/
+TDLIMITER_ERROR pcmLimiter_Apply(TDLimiterPtr limiter, PCM_LIM* samplesIn,
+                                 INT_PCM* samplesOut, FIXP_DBL* pGain,
+                                 const INT* gain_scale, const UINT gain_size,
+                                 const UINT gain_delay, const UINT nSamples);
+
+#endif /* #ifndef LIMITER_H */