xref: /aosp_15_r20/external/aac/libAACenc/src/bit_cnt.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]
----------------------------------------------------------------------------- */

/**************************** AAC encoder library ******************************

   Author(s):   M.Werner

   Description: Huffman Bitcounter & coder

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

#include "bit_cnt.h"

#include "aacEnc_ram.h"

#define HI_LTAB(a) (a >> 16)
#define LO_LTAB(a) (a & 0xffff)

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


    functionname: FDKaacEnc_count1_2_3_4_5_6_7_8_9_10_11
    description:  counts tables 1-11
    returns:
    input:        quantized spectrum
    output:       bitCount for tables 1-11

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

static void FDKaacEnc_count1_2_3_4_5_6_7_8_9_10_11(const SHORT *const values,
                                                   const INT width,
                                                   INT *RESTRICT bitCount) {
  INT i;
  INT bc1_2, bc3_4, bc5_6, bc7_8, bc9_10, bc11, sc;
  INT t0, t1, t2, t3;
  bc1_2 = 0;
  bc3_4 = 0;
  bc5_6 = 0;
  bc7_8 = 0;
  bc9_10 = 0;
  bc11 = 0;
  sc = 0;

  DWORD_ALIGNED(values);

  for (i = 0; i < width; i += 4) {
    t0 = values[i + 0];
    t1 = values[i + 1];
    t2 = values[i + 2];
    t3 = values[i + 3];

    bc1_2 += (INT)FDKaacEnc_huff_ltab1_2[t0 + 1][t1 + 1][t2 + 1][t3 + 1];
    bc5_6 += (INT)FDKaacEnc_huff_ltab5_6[t0 + 4][t1 + 4] +
             (INT)FDKaacEnc_huff_ltab5_6[t2 + 4][t3 + 4];

    t0 = fixp_abs(t0);
    sc += (t0 > 0);
    t1 = fixp_abs(t1);
    sc += (t1 > 0);
    t2 = fixp_abs(t2);
    sc += (t2 > 0);
    t3 = fixp_abs(t3);
    sc += (t3 > 0);

    bc3_4 += (INT)FDKaacEnc_huff_ltab3_4[t0][t1][t2][t3];
    bc7_8 += (INT)FDKaacEnc_huff_ltab7_8[t0][t1] +
             (INT)FDKaacEnc_huff_ltab7_8[t2][t3];
    bc9_10 += (INT)FDKaacEnc_huff_ltab9_10[t0][t1] +
              (INT)FDKaacEnc_huff_ltab9_10[t2][t3];
    bc11 +=
        (INT)FDKaacEnc_huff_ltab11[t0][t1] + (INT)FDKaacEnc_huff_ltab11[t2][t3];
  }
  bitCount[1] = HI_LTAB(bc1_2);
  bitCount[2] = LO_LTAB(bc1_2);
  bitCount[3] = HI_LTAB(bc3_4) + sc;
  bitCount[4] = LO_LTAB(bc3_4) + sc;
  bitCount[5] = HI_LTAB(bc5_6);
  bitCount[6] = LO_LTAB(bc5_6);
  bitCount[7] = HI_LTAB(bc7_8) + sc;
  bitCount[8] = LO_LTAB(bc7_8) + sc;
  bitCount[9] = HI_LTAB(bc9_10) + sc;
  bitCount[10] = LO_LTAB(bc9_10) + sc;
  bitCount[11] = bc11 + sc;
}

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

    functionname: FDKaacEnc_count3_4_5_6_7_8_9_10_11
    description:  counts tables 3-11
    returns:
    input:        quantized spectrum
    output:       bitCount for tables 3-11

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

static void FDKaacEnc_count3_4_5_6_7_8_9_10_11(const SHORT *const values,
                                               const INT width,
                                               INT *RESTRICT bitCount) {
  INT i;
  INT bc3_4, bc5_6, bc7_8, bc9_10, bc11, sc;
  INT t0, t1, t2, t3;

  bc3_4 = 0;
  bc5_6 = 0;
  bc7_8 = 0;
  bc9_10 = 0;
  bc11 = 0;
  sc = 0;

  DWORD_ALIGNED(values);

  for (i = 0; i < width; i += 4) {
    t0 = values[i + 0];
    t1 = values[i + 1];
    t2 = values[i + 2];
    t3 = values[i + 3];

    bc5_6 += (INT)FDKaacEnc_huff_ltab5_6[t0 + 4][t1 + 4] +
             (INT)FDKaacEnc_huff_ltab5_6[t2 + 4][t3 + 4];

    t0 = fixp_abs(t0);
    sc += (t0 > 0);
    t1 = fixp_abs(t1);
    sc += (t1 > 0);
    t2 = fixp_abs(t2);
    sc += (t2 > 0);
    t3 = fixp_abs(t3);
    sc += (t3 > 0);

    bc3_4 += (INT)FDKaacEnc_huff_ltab3_4[t0][t1][t2][t3];
    bc7_8 += (INT)FDKaacEnc_huff_ltab7_8[t0][t1] +
             (INT)FDKaacEnc_huff_ltab7_8[t2][t3];
    bc9_10 += (INT)FDKaacEnc_huff_ltab9_10[t0][t1] +
              (INT)FDKaacEnc_huff_ltab9_10[t2][t3];
    bc11 +=
        (INT)FDKaacEnc_huff_ltab11[t0][t1] + (INT)FDKaacEnc_huff_ltab11[t2][t3];
  }

  bitCount[1] = INVALID_BITCOUNT;
  bitCount[2] = INVALID_BITCOUNT;
  bitCount[3] = HI_LTAB(bc3_4) + sc;
  bitCount[4] = LO_LTAB(bc3_4) + sc;
  bitCount[5] = HI_LTAB(bc5_6);
  bitCount[6] = LO_LTAB(bc5_6);
  bitCount[7] = HI_LTAB(bc7_8) + sc;
  bitCount[8] = LO_LTAB(bc7_8) + sc;
  bitCount[9] = HI_LTAB(bc9_10) + sc;
  bitCount[10] = LO_LTAB(bc9_10) + sc;
  bitCount[11] = bc11 + sc;
}

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

    functionname: FDKaacEnc_count5_6_7_8_9_10_11
    description:  counts tables 5-11
    returns:
    input:        quantized spectrum
    output:       bitCount for tables 5-11

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

static void FDKaacEnc_count5_6_7_8_9_10_11(const SHORT *const values,
                                           const INT width,
                                           INT *RESTRICT bitCount) {
  INT i;
  INT bc5_6, bc7_8, bc9_10, bc11, sc;
  INT t0, t1, t2, t3;
  bc5_6 = 0;
  bc7_8 = 0;
  bc9_10 = 0;
  bc11 = 0;
  sc = 0;

  DWORD_ALIGNED(values);

  for (i = 0; i < width; i += 4) {
    t0 = values[i + 0];
    t1 = values[i + 1];
    t2 = values[i + 2];
    t3 = values[i + 3];

    bc5_6 += (INT)FDKaacEnc_huff_ltab5_6[t0 + 4][t1 + 4] +
             (INT)FDKaacEnc_huff_ltab5_6[t2 + 4][t3 + 4];

    t0 = fixp_abs(t0);
    sc += (t0 > 0);
    t1 = fixp_abs(t1);
    sc += (t1 > 0);
    t2 = fixp_abs(t2);
    sc += (t2 > 0);
    t3 = fixp_abs(t3);
    sc += (t3 > 0);

    bc7_8 += (INT)FDKaacEnc_huff_ltab7_8[t0][t1] +
             (INT)FDKaacEnc_huff_ltab7_8[t2][t3];
    bc9_10 += (INT)FDKaacEnc_huff_ltab9_10[t0][t1] +
              (INT)FDKaacEnc_huff_ltab9_10[t2][t3];
    bc11 +=
        (INT)FDKaacEnc_huff_ltab11[t0][t1] + (INT)FDKaacEnc_huff_ltab11[t2][t3];
  }
  bitCount[1] = INVALID_BITCOUNT;
  bitCount[2] = INVALID_BITCOUNT;
  bitCount[3] = INVALID_BITCOUNT;
  bitCount[4] = INVALID_BITCOUNT;
  bitCount[5] = HI_LTAB(bc5_6);
  bitCount[6] = LO_LTAB(bc5_6);
  bitCount[7] = HI_LTAB(bc7_8) + sc;
  bitCount[8] = LO_LTAB(bc7_8) + sc;
  bitCount[9] = HI_LTAB(bc9_10) + sc;
  bitCount[10] = LO_LTAB(bc9_10) + sc;
  bitCount[11] = bc11 + sc;
}

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

    functionname: FDKaacEnc_count7_8_9_10_11
    description:  counts tables 7-11
    returns:
    input:        quantized spectrum
    output:       bitCount for tables 7-11

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

static void FDKaacEnc_count7_8_9_10_11(const SHORT *const values,
                                       const INT width,
                                       INT *RESTRICT bitCount) {
  INT i;
  INT bc7_8, bc9_10, bc11, sc;
  INT t0, t1, t2, t3;

  bc7_8 = 0;
  bc9_10 = 0;
  bc11 = 0;
  sc = 0;

  DWORD_ALIGNED(values);

  for (i = 0; i < width; i += 4) {
    t0 = values[i + 0];
    t1 = values[i + 1];
    t2 = values[i + 2];
    t3 = values[i + 3];

    t0 = fixp_abs(t0);
    sc += (t0 > 0);
    t1 = fixp_abs(t1);
    sc += (t1 > 0);
    t2 = fixp_abs(t2);
    sc += (t2 > 0);
    t3 = fixp_abs(t3);
    sc += (t3 > 0);

    bc7_8 += (INT)FDKaacEnc_huff_ltab7_8[t0][t1] +
             (INT)FDKaacEnc_huff_ltab7_8[t2][t3];
    bc9_10 += (INT)FDKaacEnc_huff_ltab9_10[t0][t1] +
              (INT)FDKaacEnc_huff_ltab9_10[t2][t3];
    bc11 +=
        (INT)FDKaacEnc_huff_ltab11[t0][t1] + (INT)FDKaacEnc_huff_ltab11[t2][t3];
  }

  bitCount[1] = INVALID_BITCOUNT;
  bitCount[2] = INVALID_BITCOUNT;
  bitCount[3] = INVALID_BITCOUNT;
  bitCount[4] = INVALID_BITCOUNT;
  bitCount[5] = INVALID_BITCOUNT;
  bitCount[6] = INVALID_BITCOUNT;
  bitCount[7] = HI_LTAB(bc7_8) + sc;
  bitCount[8] = LO_LTAB(bc7_8) + sc;
  bitCount[9] = HI_LTAB(bc9_10) + sc;
  bitCount[10] = LO_LTAB(bc9_10) + sc;
  bitCount[11] = bc11 + sc;
}

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

    functionname: FDKaacEnc_count9_10_11
    description:  counts tables 9-11
    returns:
    input:        quantized spectrum
    output:       bitCount for tables 9-11

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

static void FDKaacEnc_count9_10_11(const SHORT *const values, const INT width,
                                   INT *RESTRICT bitCount) {
  INT i;
  INT bc9_10, bc11, sc;
  INT t0, t1, t2, t3;

  bc9_10 = 0;
  bc11 = 0;
  sc = 0;

  DWORD_ALIGNED(values);

  for (i = 0; i < width; i += 4) {
    t0 = values[i + 0];
    t1 = values[i + 1];
    t2 = values[i + 2];
    t3 = values[i + 3];

    t0 = fixp_abs(t0);
    sc += (t0 > 0);
    t1 = fixp_abs(t1);
    sc += (t1 > 0);
    t2 = fixp_abs(t2);
    sc += (t2 > 0);
    t3 = fixp_abs(t3);
    sc += (t3 > 0);

    bc9_10 += (INT)FDKaacEnc_huff_ltab9_10[t0][t1] +
              (INT)FDKaacEnc_huff_ltab9_10[t2][t3];
    bc11 +=
        (INT)FDKaacEnc_huff_ltab11[t0][t1] + (INT)FDKaacEnc_huff_ltab11[t2][t3];
  }

  bitCount[1] = INVALID_BITCOUNT;
  bitCount[2] = INVALID_BITCOUNT;
  bitCount[3] = INVALID_BITCOUNT;
  bitCount[4] = INVALID_BITCOUNT;
  bitCount[5] = INVALID_BITCOUNT;
  bitCount[6] = INVALID_BITCOUNT;
  bitCount[7] = INVALID_BITCOUNT;
  bitCount[8] = INVALID_BITCOUNT;
  bitCount[9] = HI_LTAB(bc9_10) + sc;
  bitCount[10] = LO_LTAB(bc9_10) + sc;
  bitCount[11] = bc11 + sc;
}

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

    functionname: FDKaacEnc_count11
    description:  counts table 11
    returns:
    input:        quantized spectrum
    output:       bitCount for table 11

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

static void FDKaacEnc_count11(const SHORT *const values, const INT width,
                              INT *RESTRICT bitCount) {
  INT i;
  INT bc11, sc;
  INT t0, t1, t2, t3;

  bc11 = 0;
  sc = 0;

  DWORD_ALIGNED(values);

  for (i = 0; i < width; i += 4) {
    t0 = values[i + 0];
    t1 = values[i + 1];
    t2 = values[i + 2];
    t3 = values[i + 3];

    t0 = fixp_abs(t0);
    sc += (t0 > 0);
    t1 = fixp_abs(t1);
    sc += (t1 > 0);
    t2 = fixp_abs(t2);
    sc += (t2 > 0);
    t3 = fixp_abs(t3);
    sc += (t3 > 0);

    bc11 +=
        (INT)FDKaacEnc_huff_ltab11[t0][t1] + (INT)FDKaacEnc_huff_ltab11[t2][t3];
  }

  bitCount[1] = INVALID_BITCOUNT;
  bitCount[2] = INVALID_BITCOUNT;
  bitCount[3] = INVALID_BITCOUNT;
  bitCount[4] = INVALID_BITCOUNT;
  bitCount[5] = INVALID_BITCOUNT;
  bitCount[6] = INVALID_BITCOUNT;
  bitCount[7] = INVALID_BITCOUNT;
  bitCount[8] = INVALID_BITCOUNT;
  bitCount[9] = INVALID_BITCOUNT;
  bitCount[10] = INVALID_BITCOUNT;
  bitCount[11] = bc11 + sc;
}

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

    functionname: FDKaacEnc_countEsc
    description:  counts table 11 (with Esc)
    returns:
    input:        quantized spectrum
    output:       bitCount for tables 11 (with Esc)

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

static void FDKaacEnc_countEsc(const SHORT *const values, const INT width,
                               INT *RESTRICT bitCount) {
  INT i;
  INT bc11, ec, sc;
  INT t0, t1, t00, t01;

  bc11 = 0;
  sc = 0;
  ec = 0;
  for (i = 0; i < width; i += 2) {
    t0 = fixp_abs(values[i + 0]);
    t1 = fixp_abs(values[i + 1]);

    sc += (t0 > 0) + (t1 > 0);

    t00 = fixMin(t0, 16);
    t01 = fixMin(t1, 16);
    bc11 += (INT)FDKaacEnc_huff_ltab11[t00][t01];

    if (t0 >= 16) {
      ec += 5;
      while ((t0 >>= 1) >= 16) ec += 2;
    }

    if (t1 >= 16) {
      ec += 5;
      while ((t1 >>= 1) >= 16) ec += 2;
    }
  }

  for (i = 0; i < 11; i++) bitCount[i] = INVALID_BITCOUNT;

  bitCount[11] = bc11 + sc + ec;
}

typedef void (*COUNT_FUNCTION)(const SHORT *const values, const INT width,
                               INT *RESTRICT bitCount);

static const COUNT_FUNCTION countFuncTable[CODE_BOOK_ESC_LAV + 1] = {

    FDKaacEnc_count1_2_3_4_5_6_7_8_9_10_11, /* 0  */
    FDKaacEnc_count1_2_3_4_5_6_7_8_9_10_11, /* 1  */
    FDKaacEnc_count3_4_5_6_7_8_9_10_11,     /* 2  */
    FDKaacEnc_count5_6_7_8_9_10_11,         /* 3  */
    FDKaacEnc_count5_6_7_8_9_10_11,         /* 4  */
    FDKaacEnc_count7_8_9_10_11,             /* 5  */
    FDKaacEnc_count7_8_9_10_11,             /* 6  */
    FDKaacEnc_count7_8_9_10_11,             /* 7  */
    FDKaacEnc_count9_10_11,                 /* 8  */
    FDKaacEnc_count9_10_11,                 /* 9  */
    FDKaacEnc_count9_10_11,                 /* 10 */
    FDKaacEnc_count9_10_11,                 /* 11 */
    FDKaacEnc_count9_10_11,                 /* 12 */
    FDKaacEnc_count11,                      /* 13 */
    FDKaacEnc_count11,                      /* 14 */
    FDKaacEnc_count11,                      /* 15 */
    FDKaacEnc_countEsc                      /* 16 */
};

INT FDKaacEnc_bitCount(const SHORT *const values, const INT width,
                       const INT maxVal, INT *const RESTRICT bitCount) {
  /*
    check if we can use codebook 0
  */

  bitCount[0] = (maxVal == 0) ? 0 : INVALID_BITCOUNT;

  countFuncTable[fixMin(maxVal, (INT)CODE_BOOK_ESC_LAV)](values, width,
                                                         bitCount);

  return (0);
}

/*
  count difference between actual and zeroed lines
*/
INT FDKaacEnc_countValues(SHORT *RESTRICT values, INT width, INT codeBook) {
  INT i, t0, t1, t2, t3;
  INT bitCnt = 0;

  switch (codeBook) {
    case CODE_BOOK_ZERO_NO:
      break;

    case CODE_BOOK_1_NO:
      for (i = 0; i < width; i += 4) {
        t0 = values[i + 0];
        t1 = values[i + 1];
        t2 = values[i + 2];
        t3 = values[i + 3];
        bitCnt +=
            HI_LTAB(FDKaacEnc_huff_ltab1_2[t0 + 1][t1 + 1][t2 + 1][t3 + 1]);
      }
      break;

    case CODE_BOOK_2_NO:
      for (i = 0; i < width; i += 4) {
        t0 = values[i + 0];
        t1 = values[i + 1];
        t2 = values[i + 2];
        t3 = values[i + 3];
        bitCnt +=
            LO_LTAB(FDKaacEnc_huff_ltab1_2[t0 + 1][t1 + 1][t2 + 1][t3 + 1]);
      }
      break;

    case CODE_BOOK_3_NO:
      for (i = 0; i < width; i += 4) {
        t0 = fixp_abs(values[i + 0]);
        bitCnt += (t0 > 0);
        t1 = fixp_abs(values[i + 1]);
        bitCnt += (t1 > 0);
        t2 = fixp_abs(values[i + 2]);
        bitCnt += (t2 > 0);
        t3 = fixp_abs(values[i + 3]);
        bitCnt += (t3 > 0);
        bitCnt += HI_LTAB(FDKaacEnc_huff_ltab3_4[t0][t1][t2][t3]);
      }
      break;

    case CODE_BOOK_4_NO:
      for (i = 0; i < width; i += 4) {
        t0 = fixp_abs(values[i + 0]);
        bitCnt += (t0 > 0);
        t1 = fixp_abs(values[i + 1]);
        bitCnt += (t1 > 0);
        t2 = fixp_abs(values[i + 2]);
        bitCnt += (t2 > 0);
        t3 = fixp_abs(values[i + 3]);
        bitCnt += (t3 > 0);
        bitCnt += LO_LTAB(FDKaacEnc_huff_ltab3_4[t0][t1][t2][t3]);
      }
      break;

    case CODE_BOOK_5_NO:
      for (i = 0; i < width; i += 4) {
        t0 = values[i + 0];
        t1 = values[i + 1];
        t2 = values[i + 2];
        t3 = values[i + 3];
        bitCnt += HI_LTAB(FDKaacEnc_huff_ltab5_6[t0 + 4][t1 + 4]) +
                  HI_LTAB(FDKaacEnc_huff_ltab5_6[t2 + 4][t3 + 4]);
      }
      break;

    case CODE_BOOK_6_NO:
      for (i = 0; i < width; i += 4) {
        t0 = values[i + 0];
        t1 = values[i + 1];
        t2 = values[i + 2];
        t3 = values[i + 3];
        bitCnt += LO_LTAB(FDKaacEnc_huff_ltab5_6[t0 + 4][t1 + 4]) +
                  LO_LTAB(FDKaacEnc_huff_ltab5_6[t2 + 4][t3 + 4]);
      }
      break;

    case CODE_BOOK_7_NO:
      for (i = 0; i < width; i += 4) {
        t0 = fixp_abs(values[i + 0]);
        bitCnt += (t0 > 0);
        t1 = fixp_abs(values[i + 1]);
        bitCnt += (t1 > 0);
        t2 = fixp_abs(values[i + 2]);
        bitCnt += (t2 > 0);
        t3 = fixp_abs(values[i + 3]);
        bitCnt += (t3 > 0);
        bitCnt += HI_LTAB(FDKaacEnc_huff_ltab7_8[t0][t1]) +
                  HI_LTAB(FDKaacEnc_huff_ltab7_8[t2][t3]);
      }
      break;

    case CODE_BOOK_8_NO:
      for (i = 0; i < width; i += 4) {
        t0 = fixp_abs(values[i + 0]);
        bitCnt += (t0 > 0);
        t1 = fixp_abs(values[i + 1]);
        bitCnt += (t1 > 0);
        t2 = fixp_abs(values[i + 2]);
        bitCnt += (t2 > 0);
        t3 = fixp_abs(values[i + 3]);
        bitCnt += (t3 > 0);
        bitCnt += LO_LTAB(FDKaacEnc_huff_ltab7_8[t0][t1]) +
                  LO_LTAB(FDKaacEnc_huff_ltab7_8[t2][t3]);
      }
      break;

    case CODE_BOOK_9_NO:
      for (i = 0; i < width; i += 4) {
        t0 = fixp_abs(values[i + 0]);
        bitCnt += (t0 > 0);
        t1 = fixp_abs(values[i + 1]);
        bitCnt += (t1 > 0);
        t2 = fixp_abs(values[i + 2]);
        bitCnt += (t2 > 0);
        t3 = fixp_abs(values[i + 3]);
        bitCnt += (t3 > 0);
        bitCnt += HI_LTAB(FDKaacEnc_huff_ltab9_10[t0][t1]) +
                  HI_LTAB(FDKaacEnc_huff_ltab9_10[t2][t3]);
      }
      break;

    case CODE_BOOK_10_NO:
      for (i = 0; i < width; i += 4) {
        t0 = fixp_abs(values[i + 0]);
        bitCnt += (t0 > 0);
        t1 = fixp_abs(values[i + 1]);
        bitCnt += (t1 > 0);
        t2 = fixp_abs(values[i + 2]);
        bitCnt += (t2 > 0);
        t3 = fixp_abs(values[i + 3]);
        bitCnt += (t3 > 0);
        bitCnt += LO_LTAB(FDKaacEnc_huff_ltab9_10[t0][t1]) +
                  LO_LTAB(FDKaacEnc_huff_ltab9_10[t2][t3]);
      }
      break;

    case CODE_BOOK_ESC_NO:
      for (i = 0; i < width; i += 2) {
        t0 = fixp_abs(values[i + 0]);
        bitCnt += (t0 > 0);
        t1 = fixp_abs(values[i + 1]);
        bitCnt += (t1 > 0);
        bitCnt += (INT)FDKaacEnc_huff_ltab11[fixMin(t0, 16)][fixMin(t1, 16)];
        if (t0 >= 16) {
          bitCnt += 5;
          while ((t0 >>= 1) >= 16) bitCnt += 2;
        }
        if (t1 >= 16) {
          bitCnt += 5;
          while ((t1 >>= 1) >= 16) bitCnt += 2;
        }
      }
      break;

    default:
      break;
  }

  return (bitCnt);
}

INT FDKaacEnc_codeValues(SHORT *RESTRICT values, INT width, INT codeBook,
                         HANDLE_FDK_BITSTREAM hBitstream) {
  INT i, t0, t1, t2, t3, t00, t01;
  INT codeWord, codeLength;
  INT sign, signLength;

  DWORD_ALIGNED(values);

  switch (codeBook) {
    case CODE_BOOK_ZERO_NO:
      break;

    case CODE_BOOK_1_NO:
      for (i = 0; i < width; i += 4) {
        t0 = values[i + 0] + 1;
        t1 = values[i + 1] + 1;
        t2 = values[i + 2] + 1;
        t3 = values[i + 3] + 1;
        codeWord = FDKaacEnc_huff_ctab1[t0][t1][t2][t3];
        codeLength = HI_LTAB(FDKaacEnc_huff_ltab1_2[t0][t1][t2][t3]);
        FDKwriteBits(hBitstream, codeWord, codeLength);
      }
      break;

    case CODE_BOOK_2_NO:
      for (i = 0; i < width; i += 4) {
        t0 = values[i + 0] + 1;
        t1 = values[i + 1] + 1;
        t2 = values[i + 2] + 1;
        t3 = values[i + 3] + 1;
        codeWord = FDKaacEnc_huff_ctab2[t0][t1][t2][t3];
        codeLength = LO_LTAB(FDKaacEnc_huff_ltab1_2[t0][t1][t2][t3]);
        FDKwriteBits(hBitstream, codeWord, codeLength);
      }
      break;

    case CODE_BOOK_3_NO:
      for (i = 0; i < (width >> 2); i++) {
        sign = 0;
        signLength = 0;
        int index[4];
        for (int j = 0; j < 4; j++) {
          int ti = *values++;
          int zero = (ti == 0) ? 0 : 1;
          signLength += zero;
          sign = (sign << zero) + ((UINT)ti >> 31);
          index[j] = fixp_abs(ti);
        }
        codeWord = FDKaacEnc_huff_ctab3[index[0]][index[1]][index[2]][index[3]];
        codeLength = HI_LTAB(
            FDKaacEnc_huff_ltab3_4[index[0]][index[1]][index[2]][index[3]]);
        FDKwriteBits(hBitstream, (codeWord << signLength) | sign,
                     codeLength + signLength);
      }
      break;

    case CODE_BOOK_4_NO:
      for (i = 0; i < width; i += 4) {
        sign = 0;
        signLength = 0;
        int index[4];
        for (int j = 0; j < 4; j++) {
          int ti = *values++;
          int zero = (ti == 0) ? 0 : 1;
          signLength += zero;
          sign = (sign << zero) + ((UINT)ti >> 31);
          index[j] = fixp_abs(ti);
        }
        codeWord = FDKaacEnc_huff_ctab4[index[0]][index[1]][index[2]][index[3]];
        codeLength = LO_LTAB(
            FDKaacEnc_huff_ltab3_4[index[0]][index[1]][index[2]][index[3]]);
        FDKwriteBits(hBitstream, (codeWord << signLength) | sign,
                     codeLength + signLength);
      }
      break;

    case CODE_BOOK_5_NO:
      for (i = 0; i < (width >> 2); i++) {
        t0 = *values++ + 4;
        t1 = *values++ + 4;
        t2 = *values++ + 4;
        t3 = *values++ + 4;
        codeWord = FDKaacEnc_huff_ctab5[t0][t1];
        codeLength =
            HI_LTAB(FDKaacEnc_huff_ltab5_6[t2][t3]); /* length of 2nd cw */
        codeWord = (codeWord << codeLength) + FDKaacEnc_huff_ctab5[t2][t3];
        codeLength += HI_LTAB(FDKaacEnc_huff_ltab5_6[t0][t1]);
        FDKwriteBits(hBitstream, codeWord, codeLength);
      }
      break;

    case CODE_BOOK_6_NO:
      for (i = 0; i < (width >> 2); i++) {
        t0 = *values++ + 4;
        t1 = *values++ + 4;
        t2 = *values++ + 4;
        t3 = *values++ + 4;
        codeWord = FDKaacEnc_huff_ctab6[t0][t1];
        codeLength =
            LO_LTAB(FDKaacEnc_huff_ltab5_6[t2][t3]); /* length of 2nd cw */
        codeWord = (codeWord << codeLength) + FDKaacEnc_huff_ctab6[t2][t3];
        codeLength += LO_LTAB(FDKaacEnc_huff_ltab5_6[t0][t1]);
        FDKwriteBits(hBitstream, codeWord, codeLength);
      }
      break;

    case CODE_BOOK_7_NO:
      for (i = 0; i < (width >> 1); i++) {
        t0 = *values++;
        sign = ((UINT)t0 >> 31);
        t0 = fixp_abs(t0);
        signLength = (t0 == 0) ? 0 : 1;
        t1 = *values++;
        INT zero = (t1 == 0) ? 0 : 1;
        signLength += zero;
        sign = (sign << zero) + ((UINT)t1 >> 31);
        t1 = fixp_abs(t1);
        codeWord = FDKaacEnc_huff_ctab7[t0][t1];
        codeLength = HI_LTAB(FDKaacEnc_huff_ltab7_8[t0][t1]);
        FDKwriteBits(hBitstream, (codeWord << signLength) | sign,
                     codeLength + signLength);
      }
      break;

    case CODE_BOOK_8_NO:
      for (i = 0; i < (width >> 1); i++) {
        t0 = *values++;
        sign = ((UINT)t0 >> 31);
        t0 = fixp_abs(t0);
        signLength = (t0 == 0) ? 0 : 1;
        t1 = *values++;
        INT zero = (t1 == 0) ? 0 : 1;
        signLength += zero;
        sign = (sign << zero) + ((UINT)t1 >> 31);
        t1 = fixp_abs(t1);
        codeWord = FDKaacEnc_huff_ctab8[t0][t1];
        codeLength = LO_LTAB(FDKaacEnc_huff_ltab7_8[t0][t1]);
        FDKwriteBits(hBitstream, (codeWord << signLength) | sign,
                     codeLength + signLength);
      }
      break;

    case CODE_BOOK_9_NO:
      for (i = 0; i < (width >> 1); i++) {
        t0 = *values++;
        sign = ((UINT)t0 >> 31);
        t0 = fixp_abs(t0);
        signLength = (t0 == 0) ? 0 : 1;
        t1 = *values++;
        INT zero = (t1 == 0) ? 0 : 1;
        signLength += zero;
        sign = (sign << zero) + ((UINT)t1 >> 31);
        t1 = fixp_abs(t1);
        codeWord = FDKaacEnc_huff_ctab9[t0][t1];
        codeLength = HI_LTAB(FDKaacEnc_huff_ltab9_10[t0][t1]);
        FDKwriteBits(hBitstream, (codeWord << signLength) | sign,
                     codeLength + signLength);
      }
      break;

    case CODE_BOOK_10_NO:
      for (i = 0; i < (width >> 1); i++) {
        t0 = *values++;
        sign = ((UINT)t0 >> 31);
        t0 = fixp_abs(t0);
        signLength = (t0 == 0) ? 0 : 1;
        t1 = *values++;
        INT zero = (t1 == 0) ? 0 : 1;
        signLength += zero;
        sign = (sign << zero) + ((UINT)t1 >> 31);
        t1 = fixp_abs(t1);
        codeWord = FDKaacEnc_huff_ctab10[t0][t1];
        codeLength = LO_LTAB(FDKaacEnc_huff_ltab9_10[t0][t1]);
        FDKwriteBits(hBitstream, (codeWord << signLength) | sign,
                     codeLength + signLength);
      }
      break;

    case CODE_BOOK_ESC_NO:
      for (i = 0; i < (width >> 1); i++) {
        t0 = *values++;
        sign = ((UINT)t0 >> 31);
        t0 = fixp_abs(t0);
        signLength = (t0 == 0) ? 0 : 1;
        t1 = *values++;
        INT zero = (t1 == 0) ? 0 : 1;
        signLength += zero;
        sign = (sign << zero) + ((UINT)t1 >> 31);
        t1 = fixp_abs(t1);

        t00 = fixMin(t0, 16);
        t01 = fixMin(t1, 16);

        codeWord = FDKaacEnc_huff_ctab11[t00][t01];
        codeLength = (INT)FDKaacEnc_huff_ltab11[t00][t01];
        FDKwriteBits(hBitstream, (codeWord << signLength) | sign,
                     codeLength + signLength);
        for (int j = 0; j < 2; j++) {
          if (t0 >= 16) {
            INT n = 4, p = t0;
            for (; (p >>= 1) >= 16;) n++;
            FDKwriteBits(hBitstream,
                         (((1 << (n - 3)) - 2) << n) | (t0 - (1 << n)),
                         n + n - 3);
          }
          t0 = t1;
        }
      }
      break;

    default:
      break;
  }
  return (0);
}

INT FDKaacEnc_codeScalefactorDelta(INT delta, HANDLE_FDK_BITSTREAM hBitstream) {
  INT codeWord, codeLength;

  if (fixp_abs(delta) > CODE_BOOK_SCF_LAV) return (1);

  codeWord = FDKaacEnc_huff_ctabscf[delta + CODE_BOOK_SCF_LAV];
  codeLength = (INT)FDKaacEnc_huff_ltabscf[delta + CODE_BOOK_SCF_LAV];
  FDKwriteBits(hBitstream, codeWord, codeLength);
  return (0);
}