xref: /aosp_15_r20/external/aac/libSBRenc/src/ps_bitenc.cpp (revision e54365361535b070c2db7374cec45c159c7d0e7a)

/* -----------------------------------------------------------------------------
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
[email protected]
----------------------------------------------------------------------------- */

/**************************** SBR encoder library ******************************

   Author(s):   N. Rettelbach

   Description: Parametric Stereo bitstream encoder

*******************************************************************************/

#include "ps_bitenc.h"

#include "ps_main.h"

static inline UCHAR FDKsbrEnc_WriteBits_ps(HANDLE_FDK_BITSTREAM hBitStream,
                                           UINT value,
                                           const UINT numberOfBits) {
  /* hBitStream == NULL happens here intentionally */
  if (hBitStream != NULL) {
    FDKwriteBits(hBitStream, value, numberOfBits);
  }
  return numberOfBits;
}

#define SI_SBR_EXTENSION_SIZE_BITS 4
#define SI_SBR_EXTENSION_ESC_COUNT_BITS 8
#define SI_SBR_EXTENSION_ID_BITS 2
#define EXTENSION_ID_PS_CODING 2
#define PS_EXT_ID_V0 0

static const INT iidDeltaCoarse_Offset = 14;
static const INT iidDeltaCoarse_MaxVal = 28;
static const INT iidDeltaFine_Offset = 30;
static const INT iidDeltaFine_MaxVal = 60;

/* PS Stereo Huffmantable: iidDeltaFreqCoarse */
static const UINT iidDeltaFreqCoarse_Length[] = {
    17, 17, 17, 17, 16, 15, 13, 10, 9,  7,  6,  5,  4,  3, 1,
    3,  4,  5,  6,  6,  8,  11, 13, 14, 14, 15, 17, 18, 18};
static const UINT iidDeltaFreqCoarse_Code[] = {
    0x0001fffb, 0x0001fffc, 0x0001fffd, 0x0001fffa, 0x0000fffc, 0x00007ffc,
    0x00001ffd, 0x000003fe, 0x000001fe, 0x0000007e, 0x0000003c, 0x0000001d,
    0x0000000d, 0x00000005, 0000000000, 0x00000004, 0x0000000c, 0x0000001c,
    0x0000003d, 0x0000003e, 0x000000fe, 0x000007fe, 0x00001ffc, 0x00003ffc,
    0x00003ffd, 0x00007ffd, 0x0001fffe, 0x0003fffe, 0x0003ffff};

/* PS Stereo Huffmantable: iidDeltaFreqFine */
static const UINT iidDeltaFreqFine_Length[] = {
    18, 18, 18, 18, 18, 18, 18, 18, 18, 17, 18, 17, 17, 16, 16, 15,
    14, 14, 13, 12, 12, 11, 10, 10, 8,  7,  6,  5,  4,  3,  1,  3,
    4,  5,  6,  7,  8,  9,  10, 11, 11, 12, 13, 14, 14, 15, 16, 16,
    17, 17, 18, 17, 18, 18, 18, 18, 18, 18, 18, 18, 18};
static const UINT iidDeltaFreqFine_Code[] = {
    0x0001feb4, 0x0001feb5, 0x0001fd76, 0x0001fd77, 0x0001fd74, 0x0001fd75,
    0x0001fe8a, 0x0001fe8b, 0x0001fe88, 0x0000fe80, 0x0001feb6, 0x0000fe82,
    0x0000feb8, 0x00007f42, 0x00007fae, 0x00003faf, 0x00001fd1, 0x00001fe9,
    0x00000fe9, 0x000007ea, 0x000007fb, 0x000003fb, 0x000001fb, 0x000001ff,
    0x0000007c, 0x0000003c, 0x0000001c, 0x0000000c, 0000000000, 0x00000001,
    0x00000001, 0x00000002, 0x00000001, 0x0000000d, 0x0000001d, 0x0000003d,
    0x0000007d, 0x000000fc, 0x000001fc, 0x000003fc, 0x000003f4, 0x000007eb,
    0x00000fea, 0x00001fea, 0x00001fd6, 0x00003fd0, 0x00007faf, 0x00007f43,
    0x0000feb9, 0x0000fe83, 0x0001feb7, 0x0000fe81, 0x0001fe89, 0x0001fe8e,
    0x0001fe8f, 0x0001fe8c, 0x0001fe8d, 0x0001feb2, 0x0001feb3, 0x0001feb0,
    0x0001feb1};

/* PS Stereo Huffmantable: iidDeltaTimeCoarse */
static const UINT iidDeltaTimeCoarse_Length[] = {
    19, 19, 19, 20, 20, 20, 17, 15, 12, 10, 8,  6,  4,  2, 1,
    3,  5,  7,  9,  11, 13, 14, 17, 19, 20, 20, 20, 20, 20};
static const UINT iidDeltaTimeCoarse_Code[] = {
    0x0007fff9, 0x0007fffa, 0x0007fffb, 0x000ffff8, 0x000ffff9, 0x000ffffa,
    0x0001fffd, 0x00007ffe, 0x00000ffe, 0x000003fe, 0x000000fe, 0x0000003e,
    0x0000000e, 0x00000002, 0000000000, 0x00000006, 0x0000001e, 0x0000007e,
    0x000001fe, 0x000007fe, 0x00001ffe, 0x00003ffe, 0x0001fffc, 0x0007fff8,
    0x000ffffb, 0x000ffffc, 0x000ffffd, 0x000ffffe, 0x000fffff};

/* PS Stereo Huffmantable: iidDeltaTimeFine */
static const UINT iidDeltaTimeFine_Length[] = {
    16, 16, 16, 16, 16, 16, 16, 16, 16, 15, 15, 15, 15, 15, 15, 14,
    14, 13, 13, 13, 12, 12, 11, 10, 9,  9,  7,  6,  5,  3,  1,  2,
    5,  6,  7,  8,  9,  10, 11, 11, 12, 12, 13, 13, 14, 14, 15, 15,
    15, 15, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16, 16};
static const UINT iidDeltaTimeFine_Code[] = {
    0x00004ed4, 0x00004ed5, 0x00004ece, 0x00004ecf, 0x00004ecc, 0x00004ed6,
    0x00004ed8, 0x00004f46, 0x00004f60, 0x00002718, 0x00002719, 0x00002764,
    0x00002765, 0x0000276d, 0x000027b1, 0x000013b7, 0x000013d6, 0x000009c7,
    0x000009e9, 0x000009ed, 0x000004ee, 0x000004f7, 0x00000278, 0x00000139,
    0x0000009a, 0x0000009f, 0x00000020, 0x00000011, 0x0000000a, 0x00000003,
    0x00000001, 0000000000, 0x0000000b, 0x00000012, 0x00000021, 0x0000004c,
    0x0000009b, 0x0000013a, 0x00000279, 0x00000270, 0x000004ef, 0x000004e2,
    0x000009ea, 0x000009d8, 0x000013d7, 0x000013d0, 0x000027b2, 0x000027a2,
    0x0000271a, 0x0000271b, 0x00004f66, 0x00004f67, 0x00004f61, 0x00004f47,
    0x00004ed9, 0x00004ed7, 0x00004ecd, 0x00004ed2, 0x00004ed3, 0x00004ed0,
    0x00004ed1};

static const INT iccDelta_Offset = 7;
static const INT iccDelta_MaxVal = 14;
/* PS Stereo Huffmantable: iccDeltaFreq */
static const UINT iccDeltaFreq_Length[] = {14, 14, 12, 10, 7, 5,  3, 1,
                                           2,  4,  6,  8,  9, 11, 13};
static const UINT iccDeltaFreq_Code[] = {
    0x00003fff, 0x00003ffe, 0x00000ffe, 0x000003fe, 0x0000007e,
    0x0000001e, 0x00000006, 0000000000, 0x00000002, 0x0000000e,
    0x0000003e, 0x000000fe, 0x000001fe, 0x000007fe, 0x00001ffe};

/* PS Stereo Huffmantable: iccDeltaTime */
static const UINT iccDeltaTime_Length[] = {14, 13, 11, 9, 7,  5,  3, 1,
                                           2,  4,  6,  8, 10, 12, 14};
static const UINT iccDeltaTime_Code[] = {
    0x00003ffe, 0x00001ffe, 0x000007fe, 0x000001fe, 0x0000007e,
    0x0000001e, 0x00000006, 0000000000, 0x00000002, 0x0000000e,
    0x0000003e, 0x000000fe, 0x000003fe, 0x00000ffe, 0x00003fff};

static const INT ipdDelta_Offset = 0;
static const INT ipdDelta_MaxVal = 7;
/* PS Stereo Huffmantable: ipdDeltaFreq */
static const UINT ipdDeltaFreq_Length[] = {1, 3, 4, 4, 4, 4, 4, 4};
static const UINT ipdDeltaFreq_Code[] = {0x00000001, 0000000000, 0x00000006,
                                         0x00000004, 0x00000002, 0x00000003,
                                         0x00000005, 0x00000007};

/* PS Stereo Huffmantable: ipdDeltaTime */
static const UINT ipdDeltaTime_Length[] = {1, 3, 4, 5, 5, 4, 4, 3};
static const UINT ipdDeltaTime_Code[] = {0x00000001, 0x00000002, 0x00000002,
                                         0x00000003, 0x00000002, 0000000000,
                                         0x00000003, 0x00000003};

static const INT opdDelta_Offset = 0;
static const INT opdDelta_MaxVal = 7;
/* PS Stereo Huffmantable: opdDeltaFreq */
static const UINT opdDeltaFreq_Length[] = {1, 3, 4, 4, 5, 5, 4, 3};
static const UINT opdDeltaFreq_Code[] = {
    0x00000001, 0x00000001, 0x00000006, 0x00000004,
    0x0000000f, 0x0000000e, 0x00000005, 0000000000,
};

/* PS Stereo Huffmantable: opdDeltaTime */
static const UINT opdDeltaTime_Length[] = {1, 3, 4, 5, 5, 4, 4, 3};
static const UINT opdDeltaTime_Code[] = {0x00000001, 0x00000002, 0x00000001,
                                         0x00000007, 0x00000006, 0000000000,
                                         0x00000002, 0x00000003};

static INT getNoBands(const INT mode) {
  INT noBands = 0;

  switch (mode) {
    case 0:
    case 3: /* coarse */
      noBands = PS_BANDS_COARSE;
      break;
    case 1:
    case 4: /* mid */
      noBands = PS_BANDS_MID;
      break;
    case 2:
    case 5:  /* fine not supported */
    default: /* coarse as default */
      noBands = PS_BANDS_COARSE;
  }

  return noBands;
}

static INT getIIDRes(INT iidMode) {
  if (iidMode < 3)
    return PS_IID_RES_COARSE;
  else
    return PS_IID_RES_FINE;
}

static INT encodeDeltaFreq(HANDLE_FDK_BITSTREAM hBitBuf, const INT *val,
                           const INT nBands, const UINT *codeTable,
                           const UINT *lengthTable, const INT tableOffset,
                           const INT maxVal, INT *error) {
  INT bitCnt = 0;
  INT lastVal = 0;
  INT band;

  for (band = 0; band < nBands; band++) {
    INT delta = (val[band] - lastVal) + tableOffset;
    lastVal = val[band];
    if ((delta > maxVal) || (delta < 0)) {
      *error = 1;
      delta = delta > 0 ? maxVal : 0;
    }
    bitCnt +=
        FDKsbrEnc_WriteBits_ps(hBitBuf, codeTable[delta], lengthTable[delta]);
  }

  return bitCnt;
}

static INT encodeDeltaTime(HANDLE_FDK_BITSTREAM hBitBuf, const INT *val,
                           const INT *valLast, const INT nBands,
                           const UINT *codeTable, const UINT *lengthTable,
                           const INT tableOffset, const INT maxVal,
                           INT *error) {
  INT bitCnt = 0;
  INT band;

  for (band = 0; band < nBands; band++) {
    INT delta = (val[band] - valLast[band]) + tableOffset;
    if ((delta > maxVal) || (delta < 0)) {
      *error = 1;
      delta = delta > 0 ? maxVal : 0;
    }
    bitCnt +=
        FDKsbrEnc_WriteBits_ps(hBitBuf, codeTable[delta], lengthTable[delta]);
  }

  return bitCnt;
}

INT FDKsbrEnc_EncodeIid(HANDLE_FDK_BITSTREAM hBitBuf, const INT *iidVal,
                        const INT *iidValLast, const INT nBands,
                        const PS_IID_RESOLUTION res, const PS_DELTA mode,
                        INT *error) {
  const UINT *codeTable;
  const UINT *lengthTable;
  INT bitCnt = 0;

  bitCnt = 0;

  switch (mode) {
    case PS_DELTA_FREQ:
      switch (res) {
        case PS_IID_RES_COARSE:
          codeTable = iidDeltaFreqCoarse_Code;
          lengthTable = iidDeltaFreqCoarse_Length;
          bitCnt += encodeDeltaFreq(hBitBuf, iidVal, nBands, codeTable,
                                    lengthTable, iidDeltaCoarse_Offset,
                                    iidDeltaCoarse_MaxVal, error);
          break;
        case PS_IID_RES_FINE:
          codeTable = iidDeltaFreqFine_Code;
          lengthTable = iidDeltaFreqFine_Length;
          bitCnt +=
              encodeDeltaFreq(hBitBuf, iidVal, nBands, codeTable, lengthTable,
                              iidDeltaFine_Offset, iidDeltaFine_MaxVal, error);
          break;
        default:
          *error = 1;
      }
      break;

    case PS_DELTA_TIME:
      switch (res) {
        case PS_IID_RES_COARSE:
          codeTable = iidDeltaTimeCoarse_Code;
          lengthTable = iidDeltaTimeCoarse_Length;
          bitCnt += encodeDeltaTime(
              hBitBuf, iidVal, iidValLast, nBands, codeTable, lengthTable,
              iidDeltaCoarse_Offset, iidDeltaCoarse_MaxVal, error);
          break;
        case PS_IID_RES_FINE:
          codeTable = iidDeltaTimeFine_Code;
          lengthTable = iidDeltaTimeFine_Length;
          bitCnt += encodeDeltaTime(hBitBuf, iidVal, iidValLast, nBands,
                                    codeTable, lengthTable, iidDeltaFine_Offset,
                                    iidDeltaFine_MaxVal, error);
          break;
        default:
          *error = 1;
      }
      break;

    default:
      *error = 1;
  }

  return bitCnt;
}

INT FDKsbrEnc_EncodeIcc(HANDLE_FDK_BITSTREAM hBitBuf, const INT *iccVal,
                        const INT *iccValLast, const INT nBands,
                        const PS_DELTA mode, INT *error) {
  const UINT *codeTable;
  const UINT *lengthTable;
  INT bitCnt = 0;

  switch (mode) {
    case PS_DELTA_FREQ:
      codeTable = iccDeltaFreq_Code;
      lengthTable = iccDeltaFreq_Length;
      bitCnt += encodeDeltaFreq(hBitBuf, iccVal, nBands, codeTable, lengthTable,
                                iccDelta_Offset, iccDelta_MaxVal, error);
      break;

    case PS_DELTA_TIME:
      codeTable = iccDeltaTime_Code;
      lengthTable = iccDeltaTime_Length;

      bitCnt +=
          encodeDeltaTime(hBitBuf, iccVal, iccValLast, nBands, codeTable,
                          lengthTable, iccDelta_Offset, iccDelta_MaxVal, error);
      break;

    default:
      *error = 1;
  }

  return bitCnt;
}

INT FDKsbrEnc_EncodeIpd(HANDLE_FDK_BITSTREAM hBitBuf, const INT *ipdVal,
                        const INT *ipdValLast, const INT nBands,
                        const PS_DELTA mode, INT *error) {
  const UINT *codeTable;
  const UINT *lengthTable;
  INT bitCnt = 0;

  switch (mode) {
    case PS_DELTA_FREQ:
      codeTable = ipdDeltaFreq_Code;
      lengthTable = ipdDeltaFreq_Length;
      bitCnt += encodeDeltaFreq(hBitBuf, ipdVal, nBands, codeTable, lengthTable,
                                ipdDelta_Offset, ipdDelta_MaxVal, error);
      break;

    case PS_DELTA_TIME:
      codeTable = ipdDeltaTime_Code;
      lengthTable = ipdDeltaTime_Length;

      bitCnt +=
          encodeDeltaTime(hBitBuf, ipdVal, ipdValLast, nBands, codeTable,
                          lengthTable, ipdDelta_Offset, ipdDelta_MaxVal, error);
      break;

    default:
      *error = 1;
  }

  return bitCnt;
}

INT FDKsbrEnc_EncodeOpd(HANDLE_FDK_BITSTREAM hBitBuf, const INT *opdVal,
                        const INT *opdValLast, const INT nBands,
                        const PS_DELTA mode, INT *error) {
  const UINT *codeTable;
  const UINT *lengthTable;
  INT bitCnt = 0;

  switch (mode) {
    case PS_DELTA_FREQ:
      codeTable = opdDeltaFreq_Code;
      lengthTable = opdDeltaFreq_Length;
      bitCnt += encodeDeltaFreq(hBitBuf, opdVal, nBands, codeTable, lengthTable,
                                opdDelta_Offset, opdDelta_MaxVal, error);
      break;

    case PS_DELTA_TIME:
      codeTable = opdDeltaTime_Code;
      lengthTable = opdDeltaTime_Length;

      bitCnt +=
          encodeDeltaTime(hBitBuf, opdVal, opdValLast, nBands, codeTable,
                          lengthTable, opdDelta_Offset, opdDelta_MaxVal, error);
      break;

    default:
      *error = 1;
  }

  return bitCnt;
}

static INT encodeIpdOpd(HANDLE_PS_OUT psOut, HANDLE_FDK_BITSTREAM hBitBuf) {
  INT bitCnt = 0;
  INT error = 0;
  INT env;

  FDKsbrEnc_WriteBits_ps(hBitBuf, psOut->enableIpdOpd, 1);

  if (psOut->enableIpdOpd == 1) {
    INT *ipdLast = psOut->ipdLast;
    INT *opdLast = psOut->opdLast;

    for (env = 0; env < psOut->nEnvelopes; env++) {
      bitCnt += FDKsbrEnc_WriteBits_ps(hBitBuf, psOut->deltaIPD[env], 1);
      bitCnt += FDKsbrEnc_EncodeIpd(hBitBuf, psOut->ipd[env], ipdLast,
                                    getNoBands(psOut->iidMode),
                                    psOut->deltaIPD[env], &error);

      bitCnt += FDKsbrEnc_WriteBits_ps(hBitBuf, psOut->deltaOPD[env], 1);
      bitCnt += FDKsbrEnc_EncodeOpd(hBitBuf, psOut->opd[env], opdLast,
                                    getNoBands(psOut->iidMode),
                                    psOut->deltaOPD[env], &error);
    }
    /* reserved bit */
    bitCnt += FDKsbrEnc_WriteBits_ps(hBitBuf, 0, 1);
  }

  return bitCnt;
}

static INT getEnvIdx(const INT nEnvelopes, const INT frameClass) {
  INT envIdx = 0;

  switch (nEnvelopes) {
    case 0:
      envIdx = 0;
      break;

    case 1:
      if (frameClass == 0)
        envIdx = 1;
      else
        envIdx = 0;
      break;

    case 2:
      if (frameClass == 0)
        envIdx = 2;
      else
        envIdx = 1;
      break;

    case 3:
      envIdx = 2;
      break;

    case 4:
      envIdx = 3;
      break;

    default:
      /* unsupported number of envelopes */
      envIdx = 0;
  }

  return envIdx;
}

static INT encodePSExtension(const HANDLE_PS_OUT psOut,
                             HANDLE_FDK_BITSTREAM hBitBuf) {
  INT bitCnt = 0;

  if (psOut->enableIpdOpd == 1) {
    INT ipdOpdBits = 0;
    INT extSize = (2 + encodeIpdOpd(psOut, NULL) + 7) >> 3;

    if (extSize < 15) {
      bitCnt += FDKsbrEnc_WriteBits_ps(hBitBuf, extSize, 4);
    } else {
      bitCnt += FDKsbrEnc_WriteBits_ps(hBitBuf, 15, 4);
      bitCnt += FDKsbrEnc_WriteBits_ps(hBitBuf, (extSize - 15), 8);
    }

    /* write ipd opd data */
    ipdOpdBits += FDKsbrEnc_WriteBits_ps(hBitBuf, PS_EXT_ID_V0, 2);
    ipdOpdBits += encodeIpdOpd(psOut, hBitBuf);

    /* byte align the ipd opd data  */
    if (ipdOpdBits % 8)
      ipdOpdBits += FDKsbrEnc_WriteBits_ps(hBitBuf, 0, (8 - (ipdOpdBits % 8)));

    bitCnt += ipdOpdBits;
  }

  return (bitCnt);
}

INT FDKsbrEnc_WritePSBitstream(const HANDLE_PS_OUT psOut,
                               HANDLE_FDK_BITSTREAM hBitBuf) {
  INT psExtEnable = 0;
  INT bitCnt = 0;
  INT error = 0;
  INT env;

  if (psOut != NULL) {
    /* PS HEADER */
    bitCnt += FDKsbrEnc_WriteBits_ps(hBitBuf, psOut->enablePSHeader, 1);

    if (psOut->enablePSHeader) {
      bitCnt += FDKsbrEnc_WriteBits_ps(hBitBuf, psOut->enableIID, 1);
      if (psOut->enableIID) {
        bitCnt += FDKsbrEnc_WriteBits_ps(hBitBuf, psOut->iidMode, 3);
      }
      bitCnt += FDKsbrEnc_WriteBits_ps(hBitBuf, psOut->enableICC, 1);
      if (psOut->enableICC) {
        bitCnt += FDKsbrEnc_WriteBits_ps(hBitBuf, psOut->iccMode, 3);
      }
      if (psOut->enableIpdOpd) {
        psExtEnable = 1;
      }
      bitCnt += FDKsbrEnc_WriteBits_ps(hBitBuf, psExtEnable, 1);
    }

    /* Frame class, number of envelopes */
    bitCnt += FDKsbrEnc_WriteBits_ps(hBitBuf, psOut->frameClass, 1);
    bitCnt += FDKsbrEnc_WriteBits_ps(
        hBitBuf, getEnvIdx(psOut->nEnvelopes, psOut->frameClass), 2);

    if (psOut->frameClass == 1) {
      for (env = 0; env < psOut->nEnvelopes; env++) {
        bitCnt += FDKsbrEnc_WriteBits_ps(hBitBuf, psOut->frameBorder[env], 5);
      }
    }

    if (psOut->enableIID == 1) {
      INT *iidLast = psOut->iidLast;
      for (env = 0; env < psOut->nEnvelopes; env++) {
        bitCnt += FDKsbrEnc_WriteBits_ps(hBitBuf, psOut->deltaIID[env], 1);
        bitCnt += FDKsbrEnc_EncodeIid(
            hBitBuf, psOut->iid[env], iidLast, getNoBands(psOut->iidMode),
            (PS_IID_RESOLUTION)getIIDRes(psOut->iidMode), psOut->deltaIID[env],
            &error);

        iidLast = psOut->iid[env];
      }
    }

    if (psOut->enableICC == 1) {
      INT *iccLast = psOut->iccLast;
      for (env = 0; env < psOut->nEnvelopes; env++) {
        bitCnt += FDKsbrEnc_WriteBits_ps(hBitBuf, psOut->deltaICC[env], 1);
        bitCnt += FDKsbrEnc_EncodeIcc(hBitBuf, psOut->icc[env], iccLast,
                                      getNoBands(psOut->iccMode),
                                      psOut->deltaICC[env], &error);

        iccLast = psOut->icc[env];
      }
    }

    if (psExtEnable != 0) {
      bitCnt += encodePSExtension(psOut, hBitBuf);
    }

  } /* if(psOut != NULL) */

  return bitCnt;
}