bit_cnt.cpp - Android社区 - https://www.androidos.net.cn/

/* -----------------------------------------------------------------------------------------------------------
Software License for The Fraunhofer FDK AAC Codec Library for Android

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
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Your modified versions of the FDK AAC Codec must carry prominent notices stating that you changed the software
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"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."

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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,
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or business interruption, however caused and on any theory of liability, whether in contract, strict
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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 Audio Encoder **************************

Initial author:       M.Werner
   contents/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 *RESTRICT values,
                                         const INT  width,
                                         INT       *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;

for(i=0;i<width;i+=4){

t0= values[i+0];
    t1= values[i+1];
    t2= values[i+2];
    t3= values[i+3];

/* 1,2 */

bc1_2+=FDKaacEnc_huff_ltab1_2[t0+1][t1+1][t2+1][t3+1];

/* 5,6 */
    bc5_6+=FDKaacEnc_huff_ltab5_6[t0+4][t1+4];
    bc5_6+=FDKaacEnc_huff_ltab5_6[t2+4][t3+4];

t0=fixp_abs(t0);
    t1=fixp_abs(t1);
    t2=fixp_abs(t2);
    t3=fixp_abs(t3);

bc3_4+= FDKaacEnc_huff_ltab3_4[t0][t1][t2][t3];

bc7_8+=FDKaacEnc_huff_ltab7_8[t0][t1];
    bc7_8+=FDKaacEnc_huff_ltab7_8[t2][t3];

bc9_10+=FDKaacEnc_huff_ltab9_10[t0][t1];
    bc9_10+=FDKaacEnc_huff_ltab9_10[t2][t3];

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

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

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 *RESTRICT values,
                                     const INT  width,
                                     INT       *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;

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

t0=fixp_abs(t0);
    t1=fixp_abs(t1);
    t2=fixp_abs(t2);
    t3=fixp_abs(t3);

bc3_4+= FDKaacEnc_huff_ltab3_4[t0][t1][t2][t3];

bc7_8+=FDKaacEnc_huff_ltab7_8[t0][t1];
    bc7_8+=FDKaacEnc_huff_ltab7_8[t2][t3];

bc9_10+=FDKaacEnc_huff_ltab9_10[t0][t1];
    bc9_10+=FDKaacEnc_huff_ltab9_10[t2][t3];

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

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

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 *RESTRICT values,
                                 const INT  width,
                                 INT       *bitCount)
{

INT i;
  INT bc5_6,bc7_8,bc9_10,bc11,sc;
  INT t0,t1;
  bc5_6=0;
  bc7_8=0;
  bc9_10=0;
  bc11=0;
  sc=0;

for(i=0;i<width;i+=2){

t0 = values[i+0];
    t1 = values[i+1];

bc5_6+=FDKaacEnc_huff_ltab5_6[t0+4][t1+4];

t0=fixp_abs(t0);
    t1=fixp_abs(t1);

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

sc+=(t0>0)+(t1>0);
  }
  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 *RESTRICT values,
                             const INT  width,
                             INT       *bitCount)
{

INT i;
  INT bc7_8,bc9_10,bc11,sc;
  INT t0,t1;

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

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

bc7_8+=FDKaacEnc_huff_ltab7_8[t0][t1];
    bc9_10+=FDKaacEnc_huff_ltab9_10[t0][t1];
    bc11+= (INT) FDKaacEnc_huff_ltab11[t0][t1];
    sc+=(t0>0)+(t1>0);
  }

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 *RESTRICT values,
                         const INT  width,
                         INT       *bitCount)
{

INT i;
  INT bc9_10,bc11,sc;
  INT t0,t1;

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

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

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

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

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 *RESTRICT values,
                    const INT  width,
                    INT        *bitCount)
{

INT i;
  INT bc11,sc;
  INT t0,t1;

bc11=0;
  sc=0;
  for(i=0;i<width;i+=2){
    t0=fixp_abs(values[i+0]);
    t1=fixp_abs(values[i+1]);
    bc11+= (INT) FDKaacEnc_huff_ltab11[t0][t1];
    sc+=(t0>0)+(t1>0);
  }

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 *RESTRICT 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 *RESTRICT 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 *values,
                          const INT   width,
                          INT         maxVal,
                          INT        *bitCount)
{

/*
    check if we can use codebook 0
  */

if(maxVal == 0)
    bitCount[0] = 0;
  else
    bitCount[0] = INVALID_BITCOUNT;

maxVal = fixMin(maxVal,(INT)CODE_BOOK_ESC_LAV);
  countFuncTable[maxVal](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,t00,t01;
  INT codeLength;
  INT signLength;
  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];
      codeLength = HI_LTAB(FDKaacEnc_huff_ltab1_2[t0+1][t1+1][t2+1][t3+1]);
      bitCnt+= codeLength;
    }
    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];
      codeLength = LO_LTAB(FDKaacEnc_huff_ltab1_2[t0+1][t1+1][t2+1][t3+1]);
      bitCnt+= codeLength;
    }
    break;

case CODE_BOOK_3_NO:
    for(i=0; i<width; i+=4) {
      signLength=0;
      t0 = values[i+0];
      if(t0 != 0){
        signLength++;
        t0=fixp_abs(t0);
      }
      t1 = values[i+1];
      if(t1 != 0){
        signLength++;
        t1=fixp_abs(t1);
      }
      t2 = values[i+2];
      if(t2 != 0){
        signLength++;
        t2=fixp_abs(t2);
      }
      t3 = values[i+3];
      if(t3 != 0){
        signLength++;
        t3=fixp_abs(t3);
      }

codeLength = HI_LTAB(FDKaacEnc_huff_ltab3_4[t0][t1][t2][t3]);
      bitCnt+=codeLength+signLength;
    }
    break;

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

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

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

case CODE_BOOK_7_NO:
    for(i=0; i<width; i+=2){
      signLength=0;
      t0 = values[i+0];
      if(t0 != 0){
        signLength++;
        t0=fixp_abs(t0);
      }

t1 = values[i+1];
      if(t1 != 0){
        signLength++;
        t1=fixp_abs(t1);
      }
      codeLength = HI_LTAB(FDKaacEnc_huff_ltab7_8[t0][t1]);
      bitCnt+=codeLength +signLength;
    }
    break;

case CODE_BOOK_8_NO:
    for(i=0; i<width; i+=2) {
      signLength=0;
      t0 = values[i+0];
      if(t0 != 0){
        signLength++;
        t0=fixp_abs(t0);
      }

t1 = values[i+1];
      if(t1 != 0){
        signLength++;
        t1=fixp_abs(t1);
      }
      codeLength = LO_LTAB(FDKaacEnc_huff_ltab7_8[t0][t1]);
      bitCnt+=codeLength +signLength;
    }
    break;

case CODE_BOOK_9_NO:
    for(i=0; i<width; i+=2) {
      signLength=0;
      t0 = values[i+0];
      if(t0 != 0){
        signLength++;
        t0=fixp_abs(t0);
      }
      t1 = values[i+1];
      if(t1 != 0){
        signLength++;
        t1=fixp_abs(t1);
      }
      codeLength = HI_LTAB(FDKaacEnc_huff_ltab9_10[t0][t1]);
      bitCnt+=codeLength +signLength;
    }
    break;

case CODE_BOOK_10_NO:
    for(i=0; i<width; i+=2) {
      signLength=0;
      t0 = values[i+0];
      if(t0 != 0){
        signLength++;
        t0=fixp_abs(t0);
      }

t1 = values[i+1];
      if(t1 != 0){
        signLength++;
        t1=fixp_abs(t1);
      }
      codeLength = LO_LTAB(FDKaacEnc_huff_ltab9_10[t0][t1]);
      bitCnt+=codeLength +signLength;
    }
    break;

case CODE_BOOK_ESC_NO:
    for(i=0; i<width; i+=2) {
      signLength=0;
      t0 = values[i+0];
      if(t0 != 0){
        signLength++;
        t0=fixp_abs(t0);
      }
      t1 = values[i+1];
      if(t1 != 0){
        signLength++;
        t1=fixp_abs(t1);
      }
      t00 = fixMin(t0,16);
      t01 = fixMin(t1,16);

codeLength = (INT) FDKaacEnc_huff_ltab11[t00][t01];
      bitCnt+=codeLength +signLength;
      if(t0 >=16){
        INT n,p;
        n=0;
        p=t0;
        while((p>>=1) >=16){
          bitCnt++;
          n++;
        }
        bitCnt+=(n+5);
      }
      if(t1 >=16){
        INT n,p;
        n=0;
        p=t1;
        while((p>>=1) >=16){
          bitCnt++;
          n++;
        }
        bitCnt+=(n+5);
      }
    }
    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;

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; i+=4) {
      sign=0;
      signLength=0;
      t0 = values[i+0];
      if(t0 != 0){
        signLength++;
        sign<<=1;
        if(t0 < 0){
          sign|=1;
          t0=fixp_abs(t0);
        }
      }
      t1 = values[i+1];
      if(t1 != 0){
        signLength++;
        sign<<=1;
        if(t1 < 0){
          sign|=1;
          t1=fixp_abs(t1);
        }
      }
      t2 = values[i+2];
      if(t2 != 0){
        signLength++;
        sign<<=1;
        if(t2 < 0){
          sign|=1;
          t2=fixp_abs(t2);
        }
      }
      t3 = values[i+3];
      if(t3 != 0){
        signLength++;
        sign<<=1;
        if(t3 < 0){
          sign|=1;
          t3=fixp_abs(t3);
        }
      }

codeWord   = FDKaacEnc_huff_ctab3[t0][t1][t2][t3];
      codeLength = HI_LTAB(FDKaacEnc_huff_ltab3_4[t0][t1][t2][t3]);
      FDKwriteBits(hBitstream,codeWord,codeLength);
      FDKwriteBits(hBitstream,sign,signLength);
    }
    break;

case CODE_BOOK_4_NO:
    for(i=0; i<width; i+=4) {
      sign=0;
      signLength=0;
      t0 = values[i+0];
      if(t0 != 0){
        signLength++;
        sign<<=1;
        if(t0 < 0){
          sign|=1;
          t0=fixp_abs(t0);
        }
      }
      t1 = values[i+1];
      if(t1 != 0){
        signLength++;
        sign<<=1;
        if(t1 < 0){
          sign|=1;
          t1=fixp_abs(t1);
        }
      }
      t2 = values[i+2];
      if(t2 != 0){
        signLength++;
        sign<<=1;
        if(t2 < 0){
          sign|=1;
          t2=fixp_abs(t2);
        }
      }
      t3 = values[i+3];
      if(t3 != 0){
        signLength++;
        sign<<=1;
        if(t3 < 0){
          sign|=1;
          t3=fixp_abs(t3);
        }
      }
      codeWord   = FDKaacEnc_huff_ctab4[t0][t1][t2][t3];
      codeLength = LO_LTAB(FDKaacEnc_huff_ltab3_4[t0][t1][t2][t3]);
      FDKwriteBits(hBitstream,codeWord,codeLength);
      FDKwriteBits(hBitstream,sign,signLength);
    }
    break;

case CODE_BOOK_5_NO:
    for(i=0; i<width; i+=2) {
      t0         = values[i+0]+4;
      t1         = values[i+1]+4;
      codeWord   = FDKaacEnc_huff_ctab5[t0][t1];
      codeLength = HI_LTAB(FDKaacEnc_huff_ltab5_6[t0][t1]);
      FDKwriteBits(hBitstream,codeWord,codeLength);
    }
    break;

case CODE_BOOK_6_NO:
    for(i=0; i<width; i+=2) {
      t0         = values[i+0]+4;
      t1         = values[i+1]+4;
      codeWord   = FDKaacEnc_huff_ctab6[t0][t1];
      codeLength = LO_LTAB(FDKaacEnc_huff_ltab5_6[t0][t1]);
      FDKwriteBits(hBitstream,codeWord,codeLength);
    }
    break;

case CODE_BOOK_7_NO:
    for(i=0; i<width; i+=2){
      sign=0;
      signLength=0;
      t0 = values[i+0];
      if(t0 != 0){
        signLength++;
        sign<<=1;
        if(t0 < 0){
          sign|=1;
          t0=fixp_abs(t0);
        }
      }

t1 = values[i+1];
      if(t1 != 0){
        signLength++;
        sign<<=1;
        if(t1 < 0){
          sign|=1;
          t1=fixp_abs(t1);
        }
      }
      codeWord   = FDKaacEnc_huff_ctab7[t0][t1];
      codeLength = HI_LTAB(FDKaacEnc_huff_ltab7_8[t0][t1]);
      FDKwriteBits(hBitstream,codeWord,codeLength);
      FDKwriteBits(hBitstream,sign,signLength);
    }
    break;

case CODE_BOOK_8_NO:
    for(i=0; i<width; i+=2) {
      sign=0;
      signLength=0;
      t0 = values[i+0];
      if(t0 != 0){
        signLength++;
        sign<<=1;
        if(t0 < 0){
          sign|=1;
          t0=fixp_abs(t0);
        }
      }

t1 = values[i+1];
      if(t1 != 0){
        signLength++;
        sign<<=1;
        if(t1 < 0){
          sign|=1;
          t1=fixp_abs(t1);
        }
      }
      codeWord   = FDKaacEnc_huff_ctab8[t0][t1];
      codeLength = LO_LTAB(FDKaacEnc_huff_ltab7_8[t0][t1]);
      FDKwriteBits(hBitstream,codeWord,codeLength);
      FDKwriteBits(hBitstream,sign,signLength);
    }
    break;

case CODE_BOOK_9_NO:
    for(i=0; i<width; i+=2) {
      sign=0;
      signLength=0;
      t0 = values[i+0];
      if(t0 != 0){
        signLength++;
        sign<<=1;
        if(t0 < 0){
          sign|=1;
          t0=fixp_abs(t0);
        }
      }
      t1 = values[i+1];
      if(t1 != 0){
        signLength++;
        sign<<=1;
        if(t1 < 0){
          sign|=1;
          t1=fixp_abs(t1);
        }
      }
      codeWord   = FDKaacEnc_huff_ctab9[t0][t1];
      codeLength = HI_LTAB(FDKaacEnc_huff_ltab9_10[t0][t1]);
      FDKwriteBits(hBitstream,codeWord,codeLength);
      FDKwriteBits(hBitstream,sign,signLength);
    }
    break;

case CODE_BOOK_10_NO:
    for(i=0; i<width; i+=2) {
      sign=0;
      signLength=0;
      t0 = values[i+0];
      if(t0 != 0){
        signLength++;
        sign<<=1;
        if(t0 < 0){
          sign|=1;
          t0=fixp_abs(t0);
        }
      }

t1 = values[i+1];
      if(t1 != 0){
        signLength++;
        sign<<=1;
        if(t1 < 0){
          sign|=1;
          t1=fixp_abs(t1);
        }
      }
      codeWord   = FDKaacEnc_huff_ctab10[t0][t1];
      codeLength = LO_LTAB(FDKaacEnc_huff_ltab9_10[t0][t1]);
      FDKwriteBits(hBitstream,codeWord,codeLength);
      FDKwriteBits(hBitstream,sign,signLength);
    }
    break;

case CODE_BOOK_ESC_NO:
    for(i=0; i<width; i+=2) {
      sign=0;
      signLength=0;
      t0 = values[i+0];
      if(t0 != 0){
        signLength++;
        sign<<=1;
        if(t0 < 0){
          sign|=1;
          t0=fixp_abs(t0);
        }
      }
      t1 = values[i+1];
      if(t1 != 0){
        signLength++;
        sign<<=1;
        if(t1 < 0){
          sign|=1;
          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,codeLength);
      FDKwriteBits(hBitstream,sign,signLength);
      if(t0 >=16){
        INT n,p;
        n=0;
        p=t0;
        while((p>>=1) >=16){
          FDKwriteBits(hBitstream,1,1);
          n++;
        }
        FDKwriteBits(hBitstream,0,1);
        FDKwriteBits(hBitstream,t0-(1<<(n+4)),n+4);
      }
      if(t1 >=16){
        INT n,p;
        n=0;
        p=t1;
        while((p>>=1) >=16){
          FDKwriteBits(hBitstream,1,1);
          n++;
        }
        FDKwriteBits(hBitstream,0,1);
        FDKwriteBits(hBitstream,t1-(1<<(n+4)),n+4);
      }
    }
    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);
}

C++程序 | 1123行 | 27.82 KB

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