Include patched FDK-AAC in the repository

The initial idea was to get the DAB+ patch into upstream, but since
that follows the android source releases, there is no place for a custom
DAB+ patch there.

So instead of having to maintain a patched fdk-aac that has to have the
same .so version as the distribution package on which it is installed,
we prefer having a separate fdk-aac-dab library to avoid collision.

At that point, there's no reason to keep fdk-aac in a separate
repository, as odr-audioenc is the only tool that needs DAB+ encoding
support. Including it here simplifies installation, and makes it
consistent with toolame-dab, also shipped in this repository.

DAB+ decoding support (needed by ODR-SourceCompanion, dablin, etisnoop,
welle.io and others) can be done using upstream FDK-AAC.

1 files changed, 891 insertions, 0 deletions

diff --git a/fdk-aac/libDRCdec/src/FDK_drcDecLib.cpp b/fdk-aac/libDRCdec/src/FDK_drcDecLib.cpp
new file mode 100644
index 0000000..b29b79d
--- /dev/null
+++ b/fdk-aac/libDRCdec/src/FDK_drcDecLib.cpp
@@ -0,0 +1,891 @@
+/* -----------------------------------------------------------------------------
+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):   Bernhard Neugebauer
+
+   Description: MPEG-D DRC Decoder
+
+*******************************************************************************/
+
+#include "drcDec_reader.h"
+#include "drcDec_gainDecoder.h"
+#include "FDK_drcDecLib.h"
+
+#include "drcDec_selectionProcess.h"
+#include "drcDec_tools.h"
+
+/* Decoder library info */
+#define DRCDEC_LIB_VL0 2
+#define DRCDEC_LIB_VL1 1
+#define DRCDEC_LIB_VL2 0
+#define DRCDEC_LIB_TITLE "MPEG-D DRC Decoder Lib"
+#ifdef __ANDROID__
+#define DRCDEC_LIB_BUILD_DATE ""
+#define DRCDEC_LIB_BUILD_TIME ""
+#else
+#define DRCDEC_LIB_BUILD_DATE __DATE__
+#define DRCDEC_LIB_BUILD_TIME __TIME__
+#endif
+
+typedef enum {
+  DRC_DEC_NOT_INITIALIZED = 0,
+  DRC_DEC_INITIALIZED,
+  DRC_DEC_NEW_GAIN_PAYLOAD,
+  DRC_DEC_INTERPOLATION_PREPARED
+} DRC_DEC_STATUS;
+
+struct s_drc_decoder {
+  DRC_DEC_CODEC_MODE codecMode;
+  DRC_DEC_FUNCTIONAL_RANGE functionalRange;
+  DRC_DEC_STATUS status;
+
+  /* handles of submodules */
+  HANDLE_DRC_GAIN_DECODER hGainDec;
+  HANDLE_DRC_SELECTION_PROCESS hSelectionProc;
+  int selProcInputDiff;
+
+  /* data structs */
+  UNI_DRC_CONFIG uniDrcConfig;
+  LOUDNESS_INFO_SET loudnessInfoSet;
+  UNI_DRC_GAIN uniDrcGain;
+
+  SEL_PROC_OUTPUT selProcOutput;
+} DRC_DECODER;
+
+static int isResetNeeded(HANDLE_DRC_DECODER hDrcDec,
+                         const SEL_PROC_OUTPUT oldSelProcOutput) {
+  int i, resetNeeded = 0;
+
+  if (hDrcDec->selProcOutput.numSelectedDrcSets !=
+      oldSelProcOutput.numSelectedDrcSets) {
+    resetNeeded = 1;
+  } else {
+    for (i = 0; i < hDrcDec->selProcOutput.numSelectedDrcSets; i++) {
+      if (hDrcDec->selProcOutput.selectedDrcSetIds[i] !=
+          oldSelProcOutput.selectedDrcSetIds[i])
+        resetNeeded = 1;
+      if (hDrcDec->selProcOutput.selectedDownmixIds[i] !=
+          oldSelProcOutput.selectedDownmixIds[i])
+        resetNeeded = 1;
+    }
+  }
+
+  if (hDrcDec->selProcOutput.boost != oldSelProcOutput.boost) resetNeeded = 1;
+  if (hDrcDec->selProcOutput.compress != oldSelProcOutput.compress)
+    resetNeeded = 1;
+
+  /* Note: Changes in downmix matrix are not caught, as they don't affect the
+   * DRC gain decoder */
+
+  return resetNeeded;
+}
+
+static DRC_DEC_ERROR startSelectionProcess(HANDLE_DRC_DECODER hDrcDec) {
+  DRC_ERROR dErr = DE_OK;
+  DRCDEC_SELECTION_PROCESS_RETURN sErr = DRCDEC_SELECTION_PROCESS_NO_ERROR;
+  int uniDrcConfigHasChanged = 0;
+  SEL_PROC_OUTPUT oldSelProcOutput = hDrcDec->selProcOutput;
+
+  if (!hDrcDec->status) return DRC_DEC_NOT_READY;
+
+  if (hDrcDec->functionalRange & DRC_DEC_SELECTION) {
+    uniDrcConfigHasChanged = hDrcDec->uniDrcConfig.diff;
+    if (hDrcDec->uniDrcConfig.diff || hDrcDec->loudnessInfoSet.diff ||
+        hDrcDec->selProcInputDiff) {
+      /* in case of an error, signal that selection process was not successful
+       */
+      hDrcDec->selProcOutput.numSelectedDrcSets = 0;
+
+      sErr = drcDec_SelectionProcess_Process(
+          hDrcDec->hSelectionProc, &(hDrcDec->uniDrcConfig),
+          &(hDrcDec->loudnessInfoSet), &(hDrcDec->selProcOutput));
+      if (sErr) return DRC_DEC_OK;
+
+      hDrcDec->selProcInputDiff = 0;
+      hDrcDec->uniDrcConfig.diff = 0;
+      hDrcDec->loudnessInfoSet.diff = 0;
+    }
+  }
+
+  if (hDrcDec->functionalRange & DRC_DEC_GAIN) {
+    if (isResetNeeded(hDrcDec, oldSelProcOutput) || uniDrcConfigHasChanged) {
+      dErr =
+          drcDec_GainDecoder_Config(hDrcDec->hGainDec, &(hDrcDec->uniDrcConfig),
+                                    hDrcDec->selProcOutput.numSelectedDrcSets,
+                                    hDrcDec->selProcOutput.selectedDrcSetIds,
+                                    hDrcDec->selProcOutput.selectedDownmixIds);
+      if (dErr) return DRC_DEC_OK;
+    }
+  }
+  return DRC_DEC_OK;
+}
+
+DRC_DEC_ERROR
+FDK_drcDec_Open(HANDLE_DRC_DECODER* phDrcDec,
+                const DRC_DEC_FUNCTIONAL_RANGE functionalRange) {
+  DRC_ERROR dErr = DE_OK;
+  DRCDEC_SELECTION_PROCESS_RETURN sErr = DRCDEC_SELECTION_PROCESS_NO_ERROR;
+  HANDLE_DRC_DECODER hDrcDec;
+
+  *phDrcDec = (HANDLE_DRC_DECODER)FDKcalloc(1, sizeof(DRC_DECODER));
+  if (!*phDrcDec) return DRC_DEC_OUT_OF_MEMORY;
+  hDrcDec = *phDrcDec;
+
+  hDrcDec->functionalRange = functionalRange;
+
+  hDrcDec->status = DRC_DEC_NOT_INITIALIZED;
+  hDrcDec->codecMode = DRC_DEC_CODEC_MODE_UNDEFINED;
+
+  if (hDrcDec->functionalRange & DRC_DEC_SELECTION) {
+    sErr = drcDec_SelectionProcess_Create(&(hDrcDec->hSelectionProc));
+    if (sErr) return DRC_DEC_OUT_OF_MEMORY;
+    sErr = drcDec_SelectionProcess_Init(hDrcDec->hSelectionProc);
+    if (sErr) return DRC_DEC_NOT_OK;
+    hDrcDec->selProcInputDiff = 1;
+  }
+
+  if (hDrcDec->functionalRange & DRC_DEC_GAIN) {
+    dErr = drcDec_GainDecoder_Open(&(hDrcDec->hGainDec));
+    if (dErr) return DRC_DEC_OUT_OF_MEMORY;
+  }
+
+  return DRC_DEC_OK;
+}
+
+DRC_DEC_ERROR
+FDK_drcDec_SetCodecMode(HANDLE_DRC_DECODER hDrcDec,
+                        const DRC_DEC_CODEC_MODE codecMode) {
+  DRC_ERROR dErr = DE_OK;
+  DRCDEC_SELECTION_PROCESS_RETURN sErr = DRCDEC_SELECTION_PROCESS_NO_ERROR;
+
+  if (hDrcDec == NULL) return DRC_DEC_NOT_OPENED;
+
+  if (hDrcDec->codecMode ==
+      DRC_DEC_CODEC_MODE_UNDEFINED) { /* Set codec mode, if it is set for the
+                                         first time */
+    hDrcDec->codecMode = codecMode;
+
+    if (hDrcDec->functionalRange & DRC_DEC_SELECTION) {
+      sErr = drcDec_SelectionProcess_SetCodecMode(
+          hDrcDec->hSelectionProc, (SEL_PROC_CODEC_MODE)codecMode);
+      if (sErr) return DRC_DEC_NOT_OK;
+      hDrcDec->selProcInputDiff = 1;
+    }
+
+    if (hDrcDec->functionalRange & DRC_DEC_GAIN) {
+      DELAY_MODE delayMode;
+      int timeDomainSupported;
+      SUBBAND_DOMAIN_MODE subbandDomainSupported;
+
+      switch (hDrcDec->codecMode) {
+        case DRC_DEC_MPEG_4_AAC:
+        case DRC_DEC_MPEG_D_USAC:
+        case DRC_DEC_MPEG_H_3DA:
+        default:
+          delayMode = DM_REGULAR_DELAY;
+      }
+
+      switch (hDrcDec->codecMode) {
+        case DRC_DEC_MPEG_4_AAC:
+        case DRC_DEC_MPEG_D_USAC:
+          timeDomainSupported = 1;
+          subbandDomainSupported = SDM_OFF;
+          break;
+        case DRC_DEC_MPEG_H_3DA:
+          timeDomainSupported = 1;
+          subbandDomainSupported = SDM_STFT256;
+          break;
+
+        case DRC_DEC_TEST_TIME_DOMAIN:
+          timeDomainSupported = 1;
+          subbandDomainSupported = SDM_OFF;
+          break;
+        case DRC_DEC_TEST_QMF_DOMAIN:
+          timeDomainSupported = 0;
+          subbandDomainSupported = SDM_QMF64;
+          break;
+        case DRC_DEC_TEST_STFT_DOMAIN:
+          timeDomainSupported = 0;
+          subbandDomainSupported = SDM_STFT256;
+          break;
+
+        default:
+          timeDomainSupported = 0;
+          subbandDomainSupported = SDM_OFF;
+      }
+
+      dErr = drcDec_GainDecoder_SetCodecDependentParameters(
+          hDrcDec->hGainDec, delayMode, timeDomainSupported,
+          subbandDomainSupported);
+      if (dErr) return DRC_DEC_NOT_OK;
+    }
+  }
+
+  /* Don't allow changing codecMode if it has already been set. */
+  if (hDrcDec->codecMode != codecMode) return DRC_DEC_NOT_OK;
+
+  return DRC_DEC_OK;
+}
+
+DRC_DEC_ERROR
+FDK_drcDec_Init(HANDLE_DRC_DECODER hDrcDec, const int frameSize,
+                const int sampleRate, const int baseChannelCount) {
+  DRC_ERROR dErr = DE_OK;
+  DRCDEC_SELECTION_PROCESS_RETURN sErr = DRCDEC_SELECTION_PROCESS_NO_ERROR;
+
+  if (hDrcDec == NULL || frameSize == 0 || sampleRate == 0 ||
+      baseChannelCount == 0)
+    return DRC_DEC_OK; /* return without doing anything */
+
+  if (hDrcDec->functionalRange & DRC_DEC_SELECTION) {
+    sErr = drcDec_SelectionProcess_SetParam(
+        hDrcDec->hSelectionProc, SEL_PROC_BASE_CHANNEL_COUNT,
+        (FIXP_DBL)baseChannelCount, &(hDrcDec->selProcInputDiff));
+    if (sErr) return DRC_DEC_NOT_OK;
+    sErr = drcDec_SelectionProcess_SetParam(
+        hDrcDec->hSelectionProc, SEL_PROC_SAMPLE_RATE, (FIXP_DBL)sampleRate,
+        &(hDrcDec->selProcInputDiff));
+    if (sErr) return DRC_DEC_NOT_OK;
+  }
+
+  if (hDrcDec->functionalRange & DRC_DEC_GAIN) {
+    dErr = drcDec_GainDecoder_Init(hDrcDec->hGainDec, frameSize, sampleRate);
+    if (dErr) return DRC_DEC_NOT_OK;
+  }
+
+  hDrcDec->status = DRC_DEC_INITIALIZED;
+
+  startSelectionProcess(hDrcDec);
+
+  return DRC_DEC_OK;
+}
+
+DRC_DEC_ERROR
+FDK_drcDec_Close(HANDLE_DRC_DECODER* phDrcDec) {
+  HANDLE_DRC_DECODER hDrcDec;
+
+  if (phDrcDec == NULL) {
+    return DRC_DEC_OK;
+  }
+
+  hDrcDec = *phDrcDec;
+
+  if (hDrcDec == NULL) return DRC_DEC_NOT_OPENED;
+
+  if (hDrcDec->functionalRange & DRC_DEC_GAIN) {
+    drcDec_GainDecoder_Close(&(hDrcDec->hGainDec));
+  }
+
+  if (hDrcDec->functionalRange & DRC_DEC_SELECTION) {
+    drcDec_SelectionProcess_Delete(&(hDrcDec->hSelectionProc));
+  }
+
+  FDKfree(*phDrcDec);
+  *phDrcDec = NULL;
+
+  return DRC_DEC_OK;
+}
+
+DRC_DEC_ERROR
+FDK_drcDec_SetParam(HANDLE_DRC_DECODER hDrcDec,
+                    const DRC_DEC_USERPARAM requestType,
+                    const FIXP_DBL requestValue) {
+  DRCDEC_SELECTION_PROCESS_RETURN sErr = DRCDEC_SELECTION_PROCESS_NO_ERROR;
+
+  if (hDrcDec == NULL) return DRC_DEC_NOT_OPENED;
+
+  if (hDrcDec->functionalRange == DRC_DEC_GAIN)
+    return DRC_DEC_NOT_OK; /* not supported for DRC_DEC_GAIN. All parameters are
+                              handed over to selection process lib. */
+
+  switch (requestType) {
+    case DRC_DEC_BOOST:
+      sErr = drcDec_SelectionProcess_SetParam(hDrcDec->hSelectionProc,
+                                              SEL_PROC_BOOST, requestValue,
+                                              &(hDrcDec->selProcInputDiff));
+      if (sErr) return DRC_DEC_PARAM_OUT_OF_RANGE;
+      break;
+    case DRC_DEC_COMPRESS:
+      sErr = drcDec_SelectionProcess_SetParam(hDrcDec->hSelectionProc,
+                                              SEL_PROC_COMPRESS, requestValue,
+                                              &(hDrcDec->selProcInputDiff));
+      if (sErr) return DRC_DEC_PARAM_OUT_OF_RANGE;
+      break;
+    case DRC_DEC_LOUDNESS_NORMALIZATION_ON:
+      sErr = drcDec_SelectionProcess_SetParam(
+          hDrcDec->hSelectionProc, SEL_PROC_LOUDNESS_NORMALIZATION_ON,
+          requestValue, &(hDrcDec->selProcInputDiff));
+      if (sErr) return DRC_DEC_PARAM_OUT_OF_RANGE;
+      break;
+    case DRC_DEC_TARGET_LOUDNESS:
+      sErr = drcDec_SelectionProcess_SetParam(
+          hDrcDec->hSelectionProc, SEL_PROC_TARGET_LOUDNESS, requestValue,
+          &(hDrcDec->selProcInputDiff));
+      if (sErr) return DRC_DEC_PARAM_OUT_OF_RANGE;
+      break;
+    case DRC_DEC_EFFECT_TYPE:
+      sErr = drcDec_SelectionProcess_SetParam(
+          hDrcDec->hSelectionProc, SEL_PROC_EFFECT_TYPE, requestValue,
+          &(hDrcDec->selProcInputDiff));
+      if (sErr) return DRC_DEC_PARAM_OUT_OF_RANGE;
+      break;
+    case DRC_DEC_DOWNMIX_ID:
+      sErr = drcDec_SelectionProcess_SetParam(hDrcDec->hSelectionProc,
+                                              SEL_PROC_DOWNMIX_ID, requestValue,
+                                              &(hDrcDec->selProcInputDiff));
+      if (sErr) return DRC_DEC_PARAM_OUT_OF_RANGE;
+      break;
+    case DRC_DEC_TARGET_CHANNEL_COUNT_REQUESTED:
+      sErr = drcDec_SelectionProcess_SetParam(
+          hDrcDec->hSelectionProc, SEL_PROC_TARGET_CHANNEL_COUNT, requestValue,
+          &(hDrcDec->selProcInputDiff));
+      if (sErr) return DRC_DEC_PARAM_OUT_OF_RANGE;
+      break;
+    case DRC_DEC_BASE_CHANNEL_COUNT:
+      sErr = drcDec_SelectionProcess_SetParam(
+          hDrcDec->hSelectionProc, SEL_PROC_BASE_CHANNEL_COUNT, requestValue,
+          &(hDrcDec->selProcInputDiff));
+      if (sErr) return DRC_DEC_NOT_OK;
+      break;
+    case DRC_DEC_LOUDNESS_MEASUREMENT_METHOD:
+      sErr = drcDec_SelectionProcess_SetParam(
+          hDrcDec->hSelectionProc, SEL_PROC_LOUDNESS_MEASUREMENT_METHOD,
+          requestValue, &(hDrcDec->selProcInputDiff));
+      if (sErr) return DRC_DEC_PARAM_OUT_OF_RANGE;
+      break;
+    default:
+      return DRC_DEC_INVALID_PARAM;
+  }
+
+  /* All parameters need a new start of the selection process */
+  startSelectionProcess(hDrcDec);
+
+  return DRC_DEC_OK;
+}
+
+LONG FDK_drcDec_GetParam(HANDLE_DRC_DECODER hDrcDec,
+                         const DRC_DEC_USERPARAM requestType) {
+  if (hDrcDec == NULL) return DRC_DEC_NOT_OPENED;
+
+  switch (requestType) {
+    case DRC_DEC_BOOST:
+      return (LONG)hDrcDec->selProcOutput.boost;
+    case DRC_DEC_COMPRESS:
+      return (LONG)hDrcDec->selProcOutput.compress;
+    case DRC_DEC_IS_MULTIBAND_DRC_1:
+      return (LONG)bitstreamContainsMultibandDrc(&hDrcDec->uniDrcConfig, 0);
+    case DRC_DEC_IS_MULTIBAND_DRC_2:
+      return (LONG)bitstreamContainsMultibandDrc(&hDrcDec->uniDrcConfig, 0x7F);
+    case DRC_DEC_IS_ACTIVE: {
+      /* MPEG-D DRC is considered active (and overrides MPEG-4 DRC), if
+       * uniDrc payload is present (loudnessInfoSet and/or uniDrcConfig)
+       * at least one of DRC and Loudness Control is switched on */
+      int drcOn = drcDec_SelectionProcess_GetParam(
+          hDrcDec->hSelectionProc, SEL_PROC_DYNAMIC_RANGE_CONTROL_ON);
+      int lnOn = drcDec_SelectionProcess_GetParam(
+          hDrcDec->hSelectionProc, SEL_PROC_LOUDNESS_NORMALIZATION_ON);
+      int uniDrcPayloadPresent =
+          (hDrcDec->loudnessInfoSet.loudnessInfoCount > 0);
+      uniDrcPayloadPresent |=
+          (hDrcDec->loudnessInfoSet.loudnessInfoAlbumCount > 0);
+      uniDrcPayloadPresent |=
+          (hDrcDec->uniDrcConfig.drcInstructionsUniDrcCount > 0);
+      uniDrcPayloadPresent |=
+          (hDrcDec->uniDrcConfig.downmixInstructionsCount > 0);
+      return (LONG)(uniDrcPayloadPresent && (drcOn || lnOn));
+    }
+    case DRC_DEC_TARGET_CHANNEL_COUNT_SELECTED:
+      return (LONG)hDrcDec->selProcOutput.targetChannelCount;
+    default:
+      return 0;
+  }
+}
+
+DRC_DEC_ERROR
+FDK_drcDec_SetInterfaceParameters(HANDLE_DRC_DECODER hDrcDec,
+                                  HANDLE_UNI_DRC_INTERFACE hUniDrcInterface) {
+  return DRC_DEC_UNSUPPORTED_FUNCTION;
+}
+
+DRC_DEC_ERROR
+FDK_drcDec_SetSelectionProcessMpeghParameters_simple(
+    HANDLE_DRC_DECODER hDrcDec, const int groupPresetIdRequested,
+    const int numGroupIdsRequested, const int* groupIdsRequested) {
+  return DRC_DEC_UNSUPPORTED_FUNCTION;
+}
+
+DRC_DEC_ERROR
+FDK_drcDec_SetDownmixInstructions(HANDLE_DRC_DECODER hDrcDec,
+                                  const int numDownmixId, const int* downmixId,
+                                  const int* targetLayout,
+                                  const int* targetChannelCount) {
+  return DRC_DEC_UNSUPPORTED_FUNCTION;
+}
+
+void FDK_drcDec_SetSelectionProcessOutput(
+    HANDLE_DRC_DECODER hDrcDec, HANDLE_SEL_PROC_OUTPUT hSelProcOutput) {}
+
+HANDLE_SEL_PROC_OUTPUT
+FDK_drcDec_GetSelectionProcessOutput(HANDLE_DRC_DECODER hDrcDec) {
+  if (hDrcDec == NULL) return NULL;
+
+  return &(hDrcDec->selProcOutput);
+}
+
+LONG /* FIXP_DBL, e = 7 */
+FDK_drcDec_GetGroupLoudness(HANDLE_SEL_PROC_OUTPUT hSelProcOutput,
+                            const int groupID, int* groupLoudnessAvailable) {
+  return (LONG)0;
+}
+
+void FDK_drcDec_SetChannelGains(HANDLE_DRC_DECODER hDrcDec,
+                                const int numChannels, const int frameSize,
+                                FIXP_DBL* channelGainDb, FIXP_DBL* audioBuffer,
+                                const int audioBufferChannelOffset) {
+  int err;
+
+  if (hDrcDec == NULL) return;
+
+  err = drcDec_GainDecoder_SetLoudnessNormalizationGainDb(
+      hDrcDec->hGainDec, hDrcDec->selProcOutput.loudnessNormalizationGainDb);
+  if (err) return;
+
+  drcDec_GainDecoder_SetChannelGains(hDrcDec->hGainDec, numChannels, frameSize,
+                                     channelGainDb, audioBufferChannelOffset,
+                                     audioBuffer);
+}
+
+DRC_DEC_ERROR
+FDK_drcDec_ReadUniDrcConfig(HANDLE_DRC_DECODER hDrcDec,
+                            HANDLE_FDK_BITSTREAM hBitstream) {
+  DRC_ERROR dErr = DE_OK;
+
+  if (hDrcDec == NULL) return DRC_DEC_NOT_OPENED;
+
+  if (hDrcDec->codecMode == DRC_DEC_MPEG_D_USAC) {
+    dErr = drcDec_readUniDrcConfig(hBitstream, &(hDrcDec->uniDrcConfig));
+  } else
+    return DRC_DEC_NOT_OK;
+
+  if (dErr) {
+    /* clear config, if parsing error occured */
+    FDKmemclear(&hDrcDec->uniDrcConfig, sizeof(hDrcDec->uniDrcConfig));
+    hDrcDec->uniDrcConfig.diff = 1;
+  }
+
+  startSelectionProcess(hDrcDec);
+
+  return DRC_DEC_OK;
+}
+
+DRC_DEC_ERROR
+FDK_drcDec_ReadDownmixInstructions_Box(HANDLE_DRC_DECODER hDrcDec,
+                                       HANDLE_FDK_BITSTREAM hBitstream) {
+  DRC_ERROR dErr = DE_OK;
+
+  if (hDrcDec == NULL) return DRC_DEC_NOT_OPENED;
+
+  return DRC_DEC_NOT_OK;
+
+  if (dErr) {
+    /* clear config, if parsing error occurred */
+    FDKmemclear(&hDrcDec->uniDrcConfig.downmixInstructions,
+                sizeof(hDrcDec->uniDrcConfig.downmixInstructions));
+    hDrcDec->uniDrcConfig.downmixInstructionsCount = 0;
+    hDrcDec->uniDrcConfig.downmixInstructionsCountV0 = 0;
+    hDrcDec->uniDrcConfig.downmixInstructionsCountV1 = 0;
+    hDrcDec->uniDrcConfig.diff = 1;
+  }
+
+  startSelectionProcess(hDrcDec);
+
+  return DRC_DEC_OK;
+}
+
+DRC_DEC_ERROR
+FDK_drcDec_ReadUniDrcInstructions_Box(HANDLE_DRC_DECODER hDrcDec,
+                                      HANDLE_FDK_BITSTREAM hBitstream) {
+  DRC_ERROR dErr = DE_OK;
+
+  if (hDrcDec == NULL) return DRC_DEC_NOT_OPENED;
+
+  return DRC_DEC_NOT_OK;
+
+  if (dErr) {
+    /* clear config, if parsing error occurred */
+    FDKmemclear(&hDrcDec->uniDrcConfig.drcInstructionsUniDrc,
+                sizeof(hDrcDec->uniDrcConfig.drcInstructionsUniDrc));
+    hDrcDec->uniDrcConfig.drcInstructionsUniDrcCount = 0;
+    hDrcDec->uniDrcConfig.drcInstructionsUniDrcCountV0 = 0;
+    hDrcDec->uniDrcConfig.drcInstructionsUniDrcCountV1 = 0;
+    hDrcDec->uniDrcConfig.diff = 1;
+  }
+
+  startSelectionProcess(hDrcDec);
+
+  return DRC_DEC_OK;
+}
+
+DRC_DEC_ERROR
+FDK_drcDec_ReadUniDrcCoefficients_Box(HANDLE_DRC_DECODER hDrcDec,
+                                      HANDLE_FDK_BITSTREAM hBitstream) {
+  DRC_ERROR dErr = DE_OK;
+
+  if (hDrcDec == NULL) return DRC_DEC_NOT_OPENED;
+
+  return DRC_DEC_NOT_OK;
+
+  if (dErr) {
+    /* clear config, if parsing error occurred */
+    FDKmemclear(&hDrcDec->uniDrcConfig.drcCoefficientsUniDrc,
+                sizeof(hDrcDec->uniDrcConfig.drcCoefficientsUniDrc));
+    hDrcDec->uniDrcConfig.drcCoefficientsUniDrcCount = 0;
+    hDrcDec->uniDrcConfig.drcCoefficientsUniDrcCountV0 = 0;
+    hDrcDec->uniDrcConfig.drcCoefficientsUniDrcCountV1 = 0;
+    hDrcDec->uniDrcConfig.diff = 1;
+  }
+
+  startSelectionProcess(hDrcDec);
+
+  return DRC_DEC_OK;
+}
+
+DRC_DEC_ERROR
+FDK_drcDec_ReadLoudnessInfoSet(HANDLE_DRC_DECODER hDrcDec,
+                               HANDLE_FDK_BITSTREAM hBitstream) {
+  DRC_ERROR dErr = DE_OK;
+
+  if (hDrcDec == NULL) return DRC_DEC_NOT_OPENED;
+
+  if (hDrcDec->codecMode == DRC_DEC_MPEG_D_USAC) {
+    dErr = drcDec_readLoudnessInfoSet(hBitstream, &(hDrcDec->loudnessInfoSet));
+  } else
+    return DRC_DEC_NOT_OK;
+
+  if (dErr) {
+    /* clear config, if parsing error occurred */
+    FDKmemclear(&hDrcDec->loudnessInfoSet, sizeof(hDrcDec->loudnessInfoSet));
+    hDrcDec->loudnessInfoSet.diff = 1;
+  }
+
+  startSelectionProcess(hDrcDec);
+
+  return DRC_DEC_OK;
+}
+
+DRC_DEC_ERROR
+FDK_drcDec_ReadLoudnessBox(HANDLE_DRC_DECODER hDrcDec,
+                           HANDLE_FDK_BITSTREAM hBitstream) {
+  DRC_ERROR dErr = DE_OK;
+
+  if (hDrcDec == NULL) return DRC_DEC_NOT_OPENED;
+
+  return DRC_DEC_NOT_OK;
+
+  if (dErr) {
+    /* clear config, if parsing error occurred */
+    FDKmemclear(&hDrcDec->loudnessInfoSet, sizeof(hDrcDec->loudnessInfoSet));
+    hDrcDec->loudnessInfoSet.diff = 1;
+  }
+
+  startSelectionProcess(hDrcDec);
+
+  return DRC_DEC_OK;
+}
+
+DRC_DEC_ERROR
+FDK_drcDec_ReadUniDrcGain(HANDLE_DRC_DECODER hDrcDec,
+                          HANDLE_FDK_BITSTREAM hBitstream) {
+  DRC_ERROR dErr = DE_OK;
+
+  if (hDrcDec == NULL) return DRC_DEC_NOT_OPENED;
+  if (!hDrcDec->status) {
+    return DRC_DEC_OK;
+  }
+
+  dErr = drcDec_readUniDrcGain(
+      hBitstream, &(hDrcDec->uniDrcConfig),
+      drcDec_GainDecoder_GetFrameSize(hDrcDec->hGainDec),
+      drcDec_GainDecoder_GetDeltaTminDefault(hDrcDec->hGainDec),
+      &(hDrcDec->uniDrcGain));
+  if (dErr) return DRC_DEC_NOT_OK;
+
+  hDrcDec->status = DRC_DEC_NEW_GAIN_PAYLOAD;
+
+  return DRC_DEC_OK;
+}
+
+DRC_DEC_ERROR
+FDK_drcDec_ReadUniDrc(HANDLE_DRC_DECODER hDrcDec,
+                      HANDLE_FDK_BITSTREAM hBitstream) {
+  DRC_ERROR dErr = DE_OK;
+
+  if (hDrcDec == NULL) return DRC_DEC_NOT_OPENED;
+  if (!hDrcDec->status) return DRC_DEC_NOT_READY;
+
+  dErr = drcDec_readUniDrc(
+      hBitstream, &(hDrcDec->uniDrcConfig), &(hDrcDec->loudnessInfoSet),
+      drcDec_GainDecoder_GetFrameSize(hDrcDec->hGainDec),
+      drcDec_GainDecoder_GetDeltaTminDefault(hDrcDec->hGainDec),
+      &(hDrcDec->uniDrcGain));
+  if (dErr) return DRC_DEC_NOT_OK;
+
+  startSelectionProcess(hDrcDec);
+
+  hDrcDec->status = DRC_DEC_NEW_GAIN_PAYLOAD;
+
+  return DRC_DEC_OK;
+}
+
+DRC_DEC_ERROR
+FDK_drcDec_Preprocess(HANDLE_DRC_DECODER hDrcDec) {
+  DRC_ERROR dErr = DE_OK;
+
+  if (hDrcDec == NULL) return DRC_DEC_NOT_OPENED;
+  if (!hDrcDec->status) return DRC_DEC_NOT_READY;
+  if (!(hDrcDec->functionalRange & DRC_DEC_GAIN)) return DRC_DEC_NOT_OK;
+
+  if (hDrcDec->status != DRC_DEC_NEW_GAIN_PAYLOAD) {
+    /* no new gain payload was read, e.g. during concalment or flushing.
+       Generate DRC gains based on the stored DRC gains of last frames */
+    drcDec_GainDecoder_Conceal(hDrcDec->hGainDec, &(hDrcDec->uniDrcConfig),
+                               &(hDrcDec->uniDrcGain));
+  }
+
+  dErr = drcDec_GainDecoder_Preprocess(
+      hDrcDec->hGainDec, &(hDrcDec->uniDrcGain),
+      hDrcDec->selProcOutput.loudnessNormalizationGainDb,
+      hDrcDec->selProcOutput.boost, hDrcDec->selProcOutput.compress);
+  if (dErr) return DRC_DEC_NOT_OK;
+  hDrcDec->status = DRC_DEC_INTERPOLATION_PREPARED;
+
+  return DRC_DEC_OK;
+}
+
+DRC_DEC_ERROR
+FDK_drcDec_ProcessTime(HANDLE_DRC_DECODER hDrcDec, const int delaySamples,
+                       const DRC_DEC_LOCATION drcLocation,
+                       const int channelOffset, const int drcChannelOffset,
+                       const int numChannelsProcessed, FIXP_DBL* realBuffer,
+                       const int timeDataChannelOffset) {
+  DRC_ERROR dErr = DE_OK;
+
+  if (hDrcDec == NULL) return DRC_DEC_NOT_OPENED;
+  if (!(hDrcDec->functionalRange & DRC_DEC_GAIN)) return DRC_DEC_NOT_OK;
+  if (hDrcDec->status != DRC_DEC_INTERPOLATION_PREPARED)
+    return DRC_DEC_NOT_READY;
+
+  dErr = drcDec_GainDecoder_ProcessTimeDomain(
+      hDrcDec->hGainDec, delaySamples, (GAIN_DEC_LOCATION)drcLocation,
+      channelOffset, drcChannelOffset, numChannelsProcessed,
+      timeDataChannelOffset, realBuffer);
+  if (dErr) return DRC_DEC_NOT_OK;
+
+  return DRC_DEC_OK;
+}
+
+DRC_DEC_ERROR
+FDK_drcDec_ProcessFreq(HANDLE_DRC_DECODER hDrcDec, const int delaySamples,
+                       const DRC_DEC_LOCATION drcLocation,
+                       const int channelOffset, const int drcChannelOffset,
+                       const int numChannelsProcessed,
+                       const int processSingleTimeslot, FIXP_DBL** realBuffer,
+                       FIXP_DBL** imagBuffer) {
+  DRC_ERROR dErr = DE_OK;
+
+  if (hDrcDec == NULL) return DRC_DEC_NOT_OPENED;
+  if (!(hDrcDec->functionalRange & DRC_DEC_GAIN)) return DRC_DEC_NOT_OK;
+  if (hDrcDec->status != DRC_DEC_INTERPOLATION_PREPARED)
+    return DRC_DEC_NOT_READY;
+
+  dErr = drcDec_GainDecoder_ProcessSubbandDomain(
+      hDrcDec->hGainDec, delaySamples, (GAIN_DEC_LOCATION)drcLocation,
+      channelOffset, drcChannelOffset, numChannelsProcessed,
+      processSingleTimeslot, realBuffer, imagBuffer);
+  if (dErr) return DRC_DEC_NOT_OK;
+
+  return DRC_DEC_OK;
+}
+
+DRC_DEC_ERROR
+FDK_drcDec_ApplyDownmix(HANDLE_DRC_DECODER hDrcDec, int* reverseInChannelMap,
+                        int* reverseOutChannelMap, FIXP_DBL* realBuffer,
+                        int* pNChannels) {
+  SEL_PROC_OUTPUT* pSelProcOutput = &(hDrcDec->selProcOutput);
+  int baseChCnt = pSelProcOutput->baseChannelCount;
+  int targetChCnt = pSelProcOutput->targetChannelCount;
+  int frameSize, n, ic, oc;
+  FIXP_DBL tmp_out[8];
+  FIXP_DBL* audioChannels[8];
+
+  if (hDrcDec == NULL) return DRC_DEC_NOT_OPENED;
+  if (!(hDrcDec->functionalRange & DRC_DEC_GAIN)) return DRC_DEC_NOT_OK;
+
+  /* only downmix is performed here, no upmix.
+     Downmix is only performed if downmix coefficients are provided.
+     All other cases of downmix and upmix are treated by pcmDmx library. */
+  if (pSelProcOutput->downmixMatrixPresent == 0)
+    return DRC_DEC_OK;                             /* no downmix */
+  if (targetChCnt >= baseChCnt) return DRC_DEC_OK; /* downmix only */
+
+  /* sanity checks */
+  if (realBuffer == NULL) return DRC_DEC_NOT_OK;
+  if (reverseInChannelMap == NULL) return DRC_DEC_NOT_OK;
+  if (reverseOutChannelMap == NULL) return DRC_DEC_NOT_OK;
+  if (baseChCnt > 8) return DRC_DEC_NOT_OK;
+  if (baseChCnt != *pNChannels) return DRC_DEC_NOT_OK;
+  if (targetChCnt > 8) return DRC_DEC_NOT_OK;
+
+  frameSize = drcDec_GainDecoder_GetFrameSize(hDrcDec->hGainDec);
+
+  for (ic = 0; ic < baseChCnt; ic++) {
+    audioChannels[ic] = &(realBuffer[ic * frameSize]);
+  }
+
+  /* in-place downmix */
+  for (n = 0; n < frameSize; n++) {
+    for (oc = 0; oc < targetChCnt; oc++) {
+      tmp_out[oc] = (FIXP_DBL)0;
+      for (ic = 0; ic < baseChCnt; ic++) {
+        tmp_out[oc] +=
+            fMultDiv2(audioChannels[ic][n],
+                      pSelProcOutput->downmixMatrix[reverseInChannelMap[ic]]
+                                                   [reverseOutChannelMap[oc]])
+            << 3;
+      }
+    }
+    for (oc = 0; oc < targetChCnt; oc++) {
+      if (oc >= baseChCnt) break;
+      audioChannels[oc][n] = tmp_out[oc];
+    }
+  }
+
+  for (oc = targetChCnt; oc < baseChCnt; oc++) {
+    FDKmemset(audioChannels[oc], 0, frameSize * sizeof(FIXP_DBL));
+  }
+
+  *pNChannels = targetChCnt;
+
+  return DRC_DEC_OK;
+}
+
+/* Get library info for this module. */
+DRC_DEC_ERROR
+FDK_drcDec_GetLibInfo(LIB_INFO* info) {
+  int i;
+
+  if (info == NULL) {
+    return DRC_DEC_INVALID_PARAM;
+  }
+
+  /* Search for next free tab */
+  for (i = 0; i < FDK_MODULE_LAST; i++) {
+    if (info[i].module_id == FDK_NONE) break;
+  }
+  if (i == FDK_MODULE_LAST) {
+    return DRC_DEC_NOT_OK;
+  }
+
+  /* Add the library info */
+  info[i].module_id = FDK_UNIDRCDEC;
+  info[i].version = LIB_VERSION(DRCDEC_LIB_VL0, DRCDEC_LIB_VL1, DRCDEC_LIB_VL2);
+  LIB_VERSION_STRING(info + i);
+  info[i].build_date = DRCDEC_LIB_BUILD_DATE;
+  info[i].build_time = DRCDEC_LIB_BUILD_TIME;
+  info[i].title = DRCDEC_LIB_TITLE;
+
+  return DRC_DEC_OK;
+}