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, 439 insertions, 0 deletions

diff --git a/libAACdec/src/usacdec_ace_d4t64.cpp b/libAACdec/src/usacdec_ace_d4t64.cpp
new file mode 100644
index 0000000..43e06cd
--- /dev/null
+++ b/libAACdec/src/usacdec_ace_d4t64.cpp
@@ -0,0 +1,439 @@
+/* -----------------------------------------------------------------------------
+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
+----------------------------------------------------------------------------- */
+
+/**************************** AAC decoder library ******************************
+
+   Author(s):
+
+   Description: ACELP
+
+*******************************************************************************/
+
+#include "usacdec_ace_d4t64.h"
+
+#define L_SUBFR 64 /* Subframe size              */
+
+/*
+ * D_ACELP_add_pulse
+ *
+ * Parameters:
+ *    pos         I: position of pulse
+ *    nb_pulse    I: number of pulses
+ *    track       I: track
+ *    code        O: fixed codebook
+ *
+ * Function:
+ *    Add pulses to fixed codebook
+ *
+ * Returns:
+ *    void
+ */
+static void D_ACELP_add_pulse(SHORT pos[], SHORT nb_pulse, SHORT track,
+                              FIXP_COD code[]) {
+  SHORT i, k;
+  for (k = 0; k < nb_pulse; k++) {
+    /* i = ((pos[k] & (16-1))*NB_TRACK) + track; */
+    i = ((pos[k] & (16 - 1)) << 2) + track;
+    if ((pos[k] & 16) == 0) {
+      code[i] = code[i] + (FIXP_COD)(512 << (COD_BITS - FRACT_BITS));
+    } else {
+      code[i] = code[i] - (FIXP_COD)(512 << (COD_BITS - FRACT_BITS));
+    }
+  }
+  return;
+}
+/*
+ * D_ACELP_decode_1p_N1
+ *
+ * Parameters:
+ *    index    I: pulse index
+ *    N        I: number of bits for position
+ *    offset   I: offset
+ *    pos      O: position of the pulse
+ *
+ * Function:
+ *    Decode 1 pulse with N+1 bits
+ *
+ * Returns:
+ *    void
+ */
+static void D_ACELP_decode_1p_N1(LONG index, SHORT N, SHORT offset,
+                                 SHORT pos[]) {
+  SHORT pos1;
+  LONG i, mask;
+
+  mask = ((1 << N) - 1);
+  /*
+   * Decode 1 pulse with N+1 bits
+   */
+  pos1 = (SHORT)((index & mask) + offset);
+  i = ((index >> N) & 1);
+  if (i == 1) {
+    pos1 += 16;
+  }
+  pos[0] = pos1;
+  return;
+}
+/*
+ * D_ACELP_decode_2p_2N1
+ *
+ * Parameters:
+ *    index    I: pulse index
+ *    N        I: number of bits for position
+ *    offset   I: offset
+ *    pos      O: position of the pulse
+ *
+ * Function:
+ *    Decode 2 pulses with 2*N+1 bits
+ *
+ * Returns:
+ *    void
+ */
+static void D_ACELP_decode_2p_2N1(LONG index, SHORT N, SHORT offset,
+                                  SHORT pos[]) {
+  SHORT pos1, pos2;
+  LONG mask, i;
+  mask = ((1 << N) - 1);
+  /*
+   * Decode 2 pulses with 2*N+1 bits
+   */
+  pos1 = (SHORT)(((index >> N) & mask) + offset);
+  i = (index >> (2 * N)) & 1;
+  pos2 = (SHORT)((index & mask) + offset);
+  if ((pos2 - pos1) < 0) {
+    if (i == 1) {
+      pos1 += 16;
+    } else {
+      pos2 += 16;
+    }
+  } else {
+    if (i == 1) {
+      pos1 += 16;
+      pos2 += 16;
+    }
+  }
+  pos[0] = pos1;
+  pos[1] = pos2;
+  return;
+}
+/*
+ * D_ACELP_decode_3p_3N1
+ *
+ * Parameters:
+ *    index    I: pulse index
+ *    N        I: number of bits for position
+ *    offset   I: offset
+ *    pos      O: position of the pulse
+ *
+ * Function:
+ *    Decode 3 pulses with 3*N+1 bits
+ *
+ * Returns:
+ *    void
+ */
+static void D_ACELP_decode_3p_3N1(LONG index, SHORT N, SHORT offset,
+                                  SHORT pos[]) {
+  SHORT j;
+  LONG mask, idx;
+
+  /*
+   * Decode 3 pulses with 3*N+1 bits
+   */
+  mask = ((1 << ((2 * N) - 1)) - 1);
+  idx = index & mask;
+  j = offset;
+  if (((index >> ((2 * N) - 1)) & 1) == 1) {
+    j += (1 << (N - 1));
+  }
+  D_ACELP_decode_2p_2N1(idx, N - 1, j, pos);
+  mask = ((1 << (N + 1)) - 1);
+  idx = (index >> (2 * N)) & mask;
+  D_ACELP_decode_1p_N1(idx, N, offset, pos + 2);
+  return;
+}
+/*
+ * D_ACELP_decode_4p_4N1
+ *
+ * Parameters:
+ *    index    I: pulse index
+ *    N        I: number of bits for position
+ *    offset   I: offset
+ *    pos      O: position of the pulse
+ *
+ * Function:
+ *    Decode 4 pulses with 4*N+1 bits
+ *
+ * Returns:
+ *    void
+ */
+static void D_ACELP_decode_4p_4N1(LONG index, SHORT N, SHORT offset,
+                                  SHORT pos[]) {
+  SHORT j;
+  LONG mask, idx;
+  /*
+   * Decode 4 pulses with 4*N+1 bits
+   */
+  mask = ((1 << ((2 * N) - 1)) - 1);
+  idx = index & mask;
+  j = offset;
+  if (((index >> ((2 * N) - 1)) & 1) == 1) {
+    j += (1 << (N - 1));
+  }
+  D_ACELP_decode_2p_2N1(idx, N - 1, j, pos);
+  mask = ((1 << ((2 * N) + 1)) - 1);
+  idx = (index >> (2 * N)) & mask;
+  D_ACELP_decode_2p_2N1(idx, N, offset, pos + 2);
+  return;
+}
+/*
+ * D_ACELP_decode_4p_4N
+ *
+ * Parameters:
+ *    index    I: pulse index
+ *    N        I: number of bits for position
+ *    offset   I: offset
+ *    pos      O: position of the pulse
+ *
+ * Function:
+ *    Decode 4 pulses with 4*N bits
+ *
+ * Returns:
+ *    void
+ */
+static void D_ACELP_decode_4p_4N(LONG index, SHORT N, SHORT offset,
+                                 SHORT pos[]) {
+  SHORT j, n_1;
+  /*
+   * Decode 4 pulses with 4*N bits
+   */
+  n_1 = N - 1;
+  j = offset + (1 << n_1);
+  switch ((index >> ((4 * N) - 2)) & 3) {
+    case 0:
+      if (((index >> ((4 * n_1) + 1)) & 1) == 0) {
+        D_ACELP_decode_4p_4N1(index, n_1, offset, pos);
+      } else {
+        D_ACELP_decode_4p_4N1(index, n_1, j, pos);
+      }
+      break;
+    case 1:
+      D_ACELP_decode_1p_N1((index >> ((3 * n_1) + 1)), n_1, offset, pos);
+      D_ACELP_decode_3p_3N1(index, n_1, j, pos + 1);
+      break;
+    case 2:
+      D_ACELP_decode_2p_2N1((index >> ((2 * n_1) + 1)), n_1, offset, pos);
+      D_ACELP_decode_2p_2N1(index, n_1, j, pos + 2);
+      break;
+    case 3:
+      D_ACELP_decode_3p_3N1((index >> (n_1 + 1)), n_1, offset, pos);
+      D_ACELP_decode_1p_N1(index, n_1, j, pos + 3);
+      break;
+  }
+  return;
+}
+
+/*
+ * D_ACELP_decode_4t
+ *
+ * Parameters:
+ *    index          I: index
+ *    mode           I: speech mode
+ *    code           I: (Q9) algebraic (fixed) codebook excitation
+ *
+ * Function:
+ *    20, 36, 44, 52, 64, 72, 88 bits algebraic codebook.
+ *    4 tracks x 16 positions per track = 64 samples.
+ *
+ *    20 bits 5+5+5+5 --> 4 pulses in a frame of 64 samples.
+ *    36 bits 9+9+9+9 --> 8 pulses in a frame of 64 samples.
+ *    44 bits 13+9+13+9 --> 10 pulses in a frame of 64 samples.
+ *    52 bits 13+13+13+13 --> 12 pulses in a frame of 64 samples.
+ *    64 bits 2+2+2+2+14+14+14+14 --> 16 pulses in a frame of 64 samples.
+ *    72 bits 10+2+10+2+10+14+10+14 --> 18 pulses in a frame of 64 samples.
+ *    88 bits 11+11+11+11+11+11+11+11 --> 24 pulses in a frame of 64 samples.
+ *
+ *    All pulses can have two (2) possible amplitudes: +1 or -1.
+ *    Each pulse can sixteen (16) possible positions.
+ *
+ *    codevector length    64
+ *    number of track      4
+ *    number of position   16
+ *
+ * Returns:
+ *    void
+ */
+void D_ACELP_decode_4t64(SHORT index[], int nbits, FIXP_COD code[]) {
+  LONG L_index;
+  SHORT k, pos[6];
+
+  FDKmemclear(code, L_SUBFR * sizeof(FIXP_COD));
+
+  /* decode the positions and signs of pulses and build the codeword */
+  switch (nbits) {
+    case 12:
+      for (k = 0; k < 4; k += 2) {
+        L_index = index[2 * (k / 2) + 1];
+        D_ACELP_decode_1p_N1(L_index, 4, 0, pos);
+        D_ACELP_add_pulse(pos, 1, 2 * (index[2 * (k / 2)]) + k / 2, code);
+      }
+      break;
+    case 16: {
+      int i = 0;
+      int offset = index[i++];
+      offset = (offset == 0) ? 1 : 3;
+      for (k = 0; k < 4; k++) {
+        if (k != offset) {
+          L_index = index[i++];
+          D_ACELP_decode_1p_N1(L_index, 4, 0, pos);
+          D_ACELP_add_pulse(pos, 1, k, code);
+        }
+      }
+    } break;
+    case 20:
+      for (k = 0; k < 4; k++) {
+        L_index = (LONG)index[k];
+        D_ACELP_decode_1p_N1(L_index, 4, 0, pos);
+        D_ACELP_add_pulse(pos, 1, k, code);
+      }
+      break;
+    case 28:
+      for (k = 0; k < 4 - 2; k++) {
+        L_index = (LONG)index[k];
+        D_ACELP_decode_2p_2N1(L_index, 4, 0, pos);
+        D_ACELP_add_pulse(pos, 2, k, code);
+      }
+      for (k = 2; k < 4; k++) {
+        L_index = (LONG)index[k];
+        D_ACELP_decode_1p_N1(L_index, 4, 0, pos);
+        D_ACELP_add_pulse(pos, 1, k, code);
+      }
+      break;
+    case 36:
+      for (k = 0; k < 4; k++) {
+        L_index = (LONG)index[k];
+        D_ACELP_decode_2p_2N1(L_index, 4, 0, pos);
+        D_ACELP_add_pulse(pos, 2, k, code);
+      }
+      break;
+    case 44:
+      for (k = 0; k < 4 - 2; k++) {
+        L_index = (LONG)index[k];
+        D_ACELP_decode_3p_3N1(L_index, 4, 0, pos);
+        D_ACELP_add_pulse(pos, 3, k, code);
+      }
+      for (k = 2; k < 4; k++) {
+        L_index = (LONG)index[k];
+        D_ACELP_decode_2p_2N1(L_index, 4, 0, pos);
+        D_ACELP_add_pulse(pos, 2, k, code);
+      }
+      break;
+    case 52:
+      for (k = 0; k < 4; k++) {
+        L_index = (LONG)index[k];
+        D_ACELP_decode_3p_3N1(L_index, 4, 0, pos);
+        D_ACELP_add_pulse(pos, 3, k, code);
+      }
+      break;
+    case 64:
+      for (k = 0; k < 4; k++) {
+        L_index = (((LONG)index[k] << 14) + (LONG)index[k + 4]);
+        D_ACELP_decode_4p_4N(L_index, 4, 0, pos);
+        D_ACELP_add_pulse(pos, 4, k, code);
+      }
+      break;
+    default:
+      FDK_ASSERT(0);
+  }
+  return;
+}