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moyuhai
2026-06-11 13:00:46 +08:00
commit e8074162f3
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component/SBC/encoder/srce/sbc_analysis.c
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component/SBC/encoder/srce/sbc_dct.c
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/******************************************************************************
*
* Copyright (C) 1999-2012 Broadcom Corporation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
******************************************************************************/
/******************************************************************************
*
* source file for fast dct operations
*
******************************************************************************/
#include "sbc_encoder.h"
#include "sbc_enc_func_declare.h"
#include "sbc_dct.h"
#include "xc60xx.h"
/*******************************************************************************
**
** Function SBC_FastIDCT8
**
** Description implementation of fast DCT algorithm by Feig and Winograd
**
**
** Returns y = dct(pInVect)
**
**
*******************************************************************************/
#if (SBC_IS_64_MULT_IN_IDCT == FALSE)
#define SBC_COS_PI_SUR_4 (0x00005a82) /* ((0x8000) * 0.7071) = cos(pi/4) */
#define SBC_COS_PI_SUR_8 (0x00007641) /* ((0x8000) * 0.9239) = (cos(pi/8)) */
#define SBC_COS_3PI_SUR_8 (0x000030fb) /* ((0x8000) * 0.3827) = (cos(3*pi/8)) */
#define SBC_COS_PI_SUR_16 (0x00007d8a) /* ((0x8000) * 0.9808)) = (cos(pi/16)) */
#define SBC_COS_3PI_SUR_16 (0x00006a6d) /* ((0x8000) * 0.8315)) = (cos(3*pi/16)) */
#define SBC_COS_5PI_SUR_16 (0x0000471c) /* ((0x8000) * 0.5556)) = (cos(5*pi/16)) */
#define SBC_COS_7PI_SUR_16 (0x000018f8) /* ((0x8000) * 0.1951)) = (cos(7*pi/16)) */
#define SBC_IDCT_MULT(a,b,c) SBC_MULT_32_16_SIMPLIFIED(a,b,c)
#else
#define SBC_COS_PI_SUR_4 (0x5A827999) /* ((0x80000000) * 0.707106781) = (cos(pi/4) ) */
#define SBC_COS_PI_SUR_8 (0x7641AF3C) /* ((0x80000000) * 0.923879533) = (cos(pi/8) ) */
#define SBC_COS_3PI_SUR_8 (0x30FBC54D) /* ((0x80000000) * 0.382683432) = (cos(3*pi/8) ) */
#define SBC_COS_PI_SUR_16 (0x7D8A5F3F) /* ((0x80000000) * 0.98078528 )) = (cos(pi/16) ) */
#define SBC_COS_3PI_SUR_16 (0x6A6D98A4) /* ((0x80000000) * 0.831469612)) = (cos(3*pi/16)) */
#define SBC_COS_5PI_SUR_16 (0x471CECE6) /* ((0x80000000) * 0.555570233)) = (cos(5*pi/16)) */
#define SBC_COS_7PI_SUR_16 (0x18F8B83C) /* ((0x80000000) * 0.195090322)) = (cos(7*pi/16)) */
#define SBC_IDCT_MULT(a,b,c) SBC_MULT_32_32(a,b,c)
#endif /* SBC_IS_64_MULT_IN_IDCT */
#if (SBC_FAST_DCT == FALSE)
extern const SINT16 gas16AnalDCTcoeff8[];
extern const SINT16 gas16AnalDCTcoeff4[];
#endif
void __attribute__((section("ram_sbc_code"))) SBC_FastIDCT8(SINT32 *pInVect, SINT32 *pOutVect)
{
#if (SBC_FAST_DCT == TRUE)
#if (SBC_ARM_ASM_OPT==TRUE)
#else
#if (SBC_IPAQ_OPT==TRUE)
#if (SBC_IS_64_MULT_IN_IDCT == TRUE)
SINT64 s64Temp;
#endif
#else
#if (SBC_IS_64_MULT_IN_IDCT == TRUE)
SINT32 s32HiTemp;
#else
SINT32 s32In2Temp;
register SINT32 s32In1Temp;
#endif
#endif
#endif
register SINT32 x0, x1, x2, x3, x4, x5, x6, x7,temp;
SINT32 res_even[4], res_odd[4];
SBC_IDCT_MULT(SBC_COS_PI_SUR_4,pInVect[4], x0);
x1 = (pInVect[3] + pInVect[5]) >>1;
x2 = (pInVect[2] + pInVect[6]) >>1;
x3 = (pInVect[1] + pInVect[7]) >>1;
x4 = (pInVect[0] + pInVect[8]) >>1;
x5 = (pInVect[9] - pInVect[15]) >>1;
x6 = (pInVect[10] - pInVect[14])>>1;
x7 = (pInVect[11] - pInVect[13])>>1;
/* 2-point IDCT of x0 and x4 as in (11) */
temp = x0 ;
SBC_IDCT_MULT(SBC_COS_PI_SUR_4, ( x0 + x4 ), x0); /*x0 = ( x0 + x4 ) * cos(1*pi/4) ; */
SBC_IDCT_MULT(SBC_COS_PI_SUR_4, ( temp - x4 ), x4); /*x4 = ( temp - x4 ) * cos(1*pi/4) ; */
/* rearrangement of x2 and x6 as in (15) */
x2 -=x6;
x6 <<= 1 ;
/* 2-point IDCT of x2 and x6 and post-multiplication as in (15) */
SBC_IDCT_MULT(SBC_COS_PI_SUR_4,x6, x6); /*x6 = x6 * cos(1*pi/4) ; */
temp = x2 ;
SBC_IDCT_MULT(SBC_COS_PI_SUR_8,( x2 + x6 ), x2); /*x2 = ( x2 + x6 ) * cos(1*pi/8) ; */
SBC_IDCT_MULT(SBC_COS_3PI_SUR_8,( temp - x6 ), x6); /*x6 = ( temp - x6 ) * cos(3*pi/8) ;*/
/* 4-point IDCT of x0,x2,x4 and x6 as in (11) */
res_even[ 0 ] = x0 + x2 ;
res_even[ 1 ] = x4 + x6 ;
res_even[ 2 ] = x4 - x6 ;
res_even[ 3 ] = x0 - x2 ;
/* rearrangement of x1,x3,x5,x7 as in (15) */
x7 <<= 1 ;
x5 = ( x5 <<1 ) - x7 ;
x3 = ( x3 <<1 ) - x5 ;
x1 -= x3 >>1 ;
/* two-dimensional IDCT of x1 and x5 */
SBC_IDCT_MULT(SBC_COS_PI_SUR_4, x5, x5); /*x5 = x5 * cos(1*pi/4) ; */
temp = x1 ;
x1 = x1 + x5 ;
x5 = temp - x5 ;
/* rearrangement of x3 and x7 as in (15) */
x3 -= x7;
x7 <<= 1 ;
SBC_IDCT_MULT(SBC_COS_PI_SUR_4, x7, x7); /*x7 = x7 * cos(1*pi/4) ; */
/* 2-point IDCT of x3 and x7 and post-multiplication as in (15) */
temp = x3 ;
SBC_IDCT_MULT( SBC_COS_PI_SUR_8,( x3 + x7 ), x3); /*x3 = ( x3 + x7 ) * cos(1*pi/8) ; */
SBC_IDCT_MULT( SBC_COS_3PI_SUR_8,( temp - x7 ), x7); /*x7 = ( temp - x7 ) * cos(3*pi/8) ;*/
/* 4-point IDCT of x1,x3,x5 and x7 and post multiplication by diagonal matrix as in (14) */
SBC_IDCT_MULT((SBC_COS_PI_SUR_16), ( x1 + x3 ) , res_odd[0]); /*res_odd[ 0 ] = ( x1 + x3 ) * cos(1*pi/16) ; */
SBC_IDCT_MULT((SBC_COS_3PI_SUR_16), ( x5 + x7 ) , res_odd[1]); /*res_odd[ 1 ] = ( x5 + x7 ) * cos(3*pi/16) ; */
SBC_IDCT_MULT((SBC_COS_5PI_SUR_16), ( x5 - x7 ) , res_odd[2]); /*res_odd[ 2 ] = ( x5 - x7 ) * cos(5*pi/16) ; */
SBC_IDCT_MULT((SBC_COS_7PI_SUR_16), ( x1 - x3 ) , res_odd[3]); /*res_odd[ 3 ] = ( x1 - x3 ) * cos(7*pi/16) ; */
/* additions and subtractions as in (9) */
pOutVect[0] = (res_even[ 0 ] + res_odd[ 0 ]) ;
pOutVect[1] = (res_even[ 1 ] + res_odd[ 1 ]) ;
pOutVect[2] = (res_even[ 2 ] + res_odd[ 2 ]) ;
pOutVect[3] = (res_even[ 3 ] + res_odd[ 3 ]) ;
pOutVect[7] = (res_even[ 0 ] - res_odd[ 0 ]) ;
pOutVect[6] = (res_even[ 1 ] - res_odd[ 1 ]) ;
pOutVect[5] = (res_even[ 2 ] - res_odd[ 2 ]) ;
pOutVect[4] = (res_even[ 3 ] - res_odd[ 3 ]) ;
#else
UINT8 Index, k;
SINT32 temp;
/*Calculate 4 subband samples by matrixing*/
for(Index=0; Index<8; Index++)
{
temp = 0;
for(k=0; k<16; k++)
{
/*temp += (SINT32)(((SINT64)M[(Index*strEncParams->numOfSubBands*2)+k] * Y[k]) >> 16 );*/
temp += (gas16AnalDCTcoeff8[(Index*8*2)+k] * (pInVect[k] >> 16));
temp += ((gas16AnalDCTcoeff8[(Index*8*2)+k] * (pInVect[k] & 0xFFFF)) >> 16);
}
pOutVect[Index] = temp;
}
#endif
}
/*******************************************************************************
**
** Function SBC_FastIDCT4
**
** Description implementation of fast DCT algorithm by Feig and Winograd
**
**
** Returns y = dct(x0)
**
**
*******************************************************************************/
void __attribute__((section("ram_sbc_code"))) SBC_FastIDCT4(SINT32 *pInVect, SINT32 *pOutVect)
{
#if (SBC_FAST_DCT == TRUE)
#if (SBC_ARM_ASM_OPT==TRUE)
#else
#if (SBC_IPAQ_OPT==TRUE)
#if (SBC_IS_64_MULT_IN_IDCT == TRUE)
SINT64 s64Temp;
#endif
#else
#if (SBC_IS_64_MULT_IN_IDCT == TRUE)
SINT32 s32HiTemp;
#else
UINT16 s32In2Temp;
SINT32 s32In1Temp;
#endif
#endif
#endif
SINT32 temp,x2;
SINT32 tmp[8];
x2=pInVect[2]>>1;
temp=(pInVect[0]+pInVect[4]);
SBC_IDCT_MULT((SBC_COS_PI_SUR_4>>1), temp , tmp[0]);
tmp[1]=x2-tmp[0];
tmp[0]+=x2;
temp=(pInVect[1]+pInVect[3]);
SBC_IDCT_MULT((SBC_COS_3PI_SUR_8>>1), temp , tmp[3]);
SBC_IDCT_MULT((SBC_COS_PI_SUR_8>>1), temp , tmp[2]);
temp=(pInVect[5]-pInVect[7]);
SBC_IDCT_MULT((SBC_COS_3PI_SUR_8>>1), temp , tmp[5]);
SBC_IDCT_MULT((SBC_COS_PI_SUR_8>>1), temp , tmp[4]);
tmp[6]=tmp[2]+tmp[5];
tmp[7]=tmp[3]-tmp[4];
pOutVect[0] = (tmp[0]+tmp[6]);
pOutVect[1] = (tmp[1]+tmp[7]);
pOutVect[2] = (tmp[1]-tmp[7]);
pOutVect[3] = (tmp[0]-tmp[6]);
#else
UINT8 Index, k;
SINT32 temp;
/*Calculate 4 subband samples by matrixing*/
for(Index=0; Index<4; Index++)
{
temp = 0;
for(k=0; k<8; k++)
{
/*temp += (SINT32)(((SINT64)M[(Index*strEncParams->numOfSubBands*2)+k] * Y[k]) >> 16 ); */
temp += (gas16AnalDCTcoeff4[(Index*4*2)+k] * (pInVect[k] >> 16));
temp += ((gas16AnalDCTcoeff4[(Index*4*2)+k] * (pInVect[k] & 0xFFFF)) >> 16);
}
pOutVect[Index] = temp;
}
#endif
}
component/SBC/encoder/srce/sbc_dct_coeffs.c
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/******************************************************************************
*
* Copyright (C) 1999-2012 Broadcom Corporation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
******************************************************************************/
/******************************************************************************
*
* This file contains the coefficient table used for DCT computation in
* analysis.
*
******************************************************************************/
#include "sbc_encoder.h"
/*DCT coeff for 4 sub-band case.*/
#if (SBC_FAST_DCT == FALSE)
const SINT16 gas16AnalDCTcoeff4[] =
{
(SINT16)(0.7071*32768),
(SINT16)(0.9239*32768),
(SINT16)(1.0000*32767),
(SINT16)(0.9239*32768),
(SINT16)(0.7071*32768),
(SINT16)(0.3827*32768),
(SINT16)(0.0000*32768),
(SINT16)(-0.3827*32768),
(SINT16)(-0.7071*32768),
(SINT16)(0.3827*32768),
(SINT16)(1.0000*32767),
(SINT16)(0.3827*32768),
(SINT16)(-0.7071*32768),
(SINT16)(-0.9239*32768),
(SINT16)(-0.0000*32768),
(SINT16)(0.9239*32768),
(SINT16)(-0.7071*32768),
(SINT16)(-0.3827*32768),
(SINT16)(1.0000*32767),
(SINT16)(-0.3827*32768),
(SINT16)(-0.7071*32768),
(SINT16)(0.9239*32768),
(SINT16)(0.0000*32768),
(SINT16)(-0.9239*32768),
(SINT16)(0.7071*32768),
(SINT16)(-0.9239*32768),
(SINT16)(1.0000*32767),
(SINT16)(-0.9239*32768),
(SINT16)(0.7071*32768),
(SINT16)(-0.3827*32768),
(SINT16)(-0.0000*32768),
(SINT16)(0.3827*32768)
};
/*DCT coeff for 8 sub-band case.*/
const SINT16 gas16AnalDCTcoeff8[] =
{
(SINT16)(0.7071*32768),
(SINT16)(0.8315*32768),
(SINT16)(0.9239*32768),
(SINT16)(0.9808*32768),
(SINT16)(1.0000*32767),
(SINT16)(0.9808*32768),
(SINT16)(0.9239*32768),
(SINT16)(0.8315*32768),
(SINT16)(0.7071*32768),
(SINT16)(0.5556*32768),
(SINT16)(0.3827*32768),
(SINT16)(0.1951*32768),
(SINT16)(0.0000*32768),
(SINT16)(-0.1951*32768),
(SINT16)(-0.3827*32768),
(SINT16)(-0.5556*32768),
(SINT16)(-0.7071*32768),
(SINT16)(-0.1951*32768),
(SINT16)(0.3827*32768),
(SINT16)(0.8315*32768),
(SINT16)(1.0000*32767),
(SINT16)(0.8315*32768),
(SINT16)(0.3827*32768),
(SINT16)(-0.1951*32768),
(SINT16)(-0.7071*32768),
(SINT16)(-0.9808*32768),
(SINT16)(-0.9239*32768),
(SINT16)(-0.5556*32768),
(SINT16)(-0.0000*32768),
(SINT16)(0.5556*32768),
(SINT16)(0.9239*32768),
(SINT16)(0.9808*32768),
(SINT16)(-0.7071*32768),
(SINT16)(-0.9808*32768),
(SINT16)(-0.3827*32768),
(SINT16)(0.5556*32768),
(SINT16)(1.0000*32767),
(SINT16)(0.5556*32768),
(SINT16)(-0.3827*32768),
(SINT16)(-0.9808*32768),
(SINT16)(-0.7071*32768),
(SINT16)(0.1951*32768),
(SINT16)(0.9239*32768),
(SINT16)(0.8315*32768),
(SINT16)(0.0000*32768),
(SINT16)(-0.8315*32768),
(SINT16)(-0.9239*32768),
(SINT16)(-0.1951*32768),
(SINT16)(0.7071*32768),
(SINT16)(-0.5556*32768),
(SINT16)(-0.9239*32768),
(SINT16)(0.1951*32768),
(SINT16)(1.0000*32767),
(SINT16)(0.1951*32768),
(SINT16)(-0.9239*32768),
(SINT16)(-0.5556*32768),
(SINT16)(0.7071*32768),
(SINT16)(0.8315*32768),
(SINT16)(-0.3827*32768),
(SINT16)(-0.9808*32768),
(SINT16)(-0.0000*32768),
(SINT16)(0.9808*32768),
(SINT16)(0.3827*32768),
(SINT16)(-0.8315*32768),
(SINT16)(0.7071*32768),
(SINT16)(0.5556*32768),
(SINT16)(-0.9239*32768),
(SINT16)(-0.1951*32768),
(SINT16)(1.0000*32767),
(SINT16)(-0.1951*32768),
(SINT16)(-0.9239*32768),
(SINT16)(0.5556*32768),
(SINT16)(0.7071*32768),
(SINT16)(-0.8315*32768),
(SINT16)(-0.3827*32768),
(SINT16)(0.9808*32768),
(SINT16)(0.0000*32768),
(SINT16)(-0.9808*32768),
(SINT16)(0.3827*32768),
(SINT16)(0.8315*32768),
(SINT16)(-0.7071*32768),
(SINT16)(0.9808*32768),
(SINT16)(-0.3827*32768),
(SINT16)(-0.5556*32768),
(SINT16)(1.0000*32767),
(SINT16)(-0.5556*32768),
(SINT16)(-0.3827*32768),
(SINT16)(0.9808*32768),
(SINT16)(-0.7071*32768),
(SINT16)(-0.1951*32768),
(SINT16)(0.9239*32768),
(SINT16)(-0.8315*32768),
(SINT16)(-0.0000*32768),
(SINT16)(0.8315*32768),
(SINT16)(-0.9239*32768),
(SINT16)(0.1951*32768),
(SINT16)(-0.7071*32768),
(SINT16)(0.1951*32768),
(SINT16)(0.3827*32768),
(SINT16)(-0.8315*32768),
(SINT16)(1.0000*32767),
(SINT16)(-0.8315*32768),
(SINT16)(0.3827*32768),
(SINT16)(0.1951*32768),
(SINT16)(-0.7071*32768),
(SINT16)(0.9808*32768),
(SINT16)(-0.9239*32768),
(SINT16)(0.5556*32768),
(SINT16)(-0.0000*32768),
(SINT16)(-0.5556*32768),
(SINT16)(0.9239*32768),
(SINT16)(-0.9808*32768),
(SINT16)(0.7071*32768),
(SINT16)(-0.8315*32768),
(SINT16)(0.9239*32768),
(SINT16)(-0.9808*32768),
(SINT16)(1.0000*32767),
(SINT16)(-0.9808*32768),
(SINT16)(0.9239*32768),
(SINT16)(-0.8315*32768),
(SINT16)(0.7071*32768),
(SINT16)(-0.5556*32768),
(SINT16)(0.3827*32768),
(SINT16)(-0.1951*32768),
(SINT16)(-0.0000*32768),
(SINT16)(0.1951*32768),
(SINT16)(-0.3827*32768),
(SINT16)(0.5556*32768)
};
#endif
component/SBC/encoder/srce/sbc_enc_bit_alloc_mono.c
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/******************************************************************************
*
* Copyright (C) 1999-2012 Broadcom Corporation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
******************************************************************************/
/******************************************************************************
*
* This file contains the code for bit allocation algorithm. It calculates
* the number of bits required for the encoded stream of data.
*
******************************************************************************/
/*Includes*/
#include "sbc_encoder.h"
#include "sbc_enc_func_declare.h"
#include "xc60xx.h"
/*global arrays*/
const SINT16 sbc_enc_as16Offset4[4][4] = { {-1, 0, 0, 0}, {-2, 0, 0, 1},
{-2, 0, 0, 1}, {-2, 0, 0, 1} };
const SINT16 sbc_enc_as16Offset8[4][8] = { {-2, 0, 0, 0, 0, 0, 0, 1},
{-3, 0, 0, 0, 0, 0, 1, 2},
{-4, 0, 0, 0, 0, 0, 1, 2},
{-4, 0, 0, 0, 0, 0, 1, 2} };
/****************************************************************************
* BitAlloc - Calculates the required number of bits for the given scale factor
* and the number of subbands.
*
* RETURNS : N/A
*/
void __attribute__((section("ram_sbc_code"))) sbc_enc_bit_alloc_mono(SBC_ENC_PARAMS *pstrCodecParams)
{
SINT32 s32MaxBitNeed; /*to store the max bits needed per sb*/
SINT32 s32BitCount; /*the used number of bits*/
SINT32 s32SliceCount; /*to store hwo many slices can be put in bitpool*/
SINT32 s32BitSlice; /*number of bitslices in bitpool*/
SINT32 s32Sb; /*counter for sub-band*/
SINT32 s32Ch; /*counter for channel*/
SINT16 *ps16BitNeed; /*temp memory to store required number of bits*/
SINT32 s32Loudness; /*used in Loudness calculation*/
SINT16 *ps16GenBufPtr;
SINT16 *ps16GenArrPtr;
SINT16 *ps16GenTabPtr;
SINT32 s32NumOfSubBands = pstrCodecParams->s16NumOfSubBands;
ps16BitNeed = pstrCodecParams->s16ScartchMemForBitAlloc;
for (s32Ch = 0; s32Ch < pstrCodecParams->s16NumOfChannels; s32Ch++)
{
ps16GenBufPtr = ps16BitNeed + (s32Ch*s32NumOfSubBands);
ps16GenArrPtr = pstrCodecParams->as16Bits+(s32Ch*SBC_MAX_NUM_OF_SUBBANDS);
/* bitneed values are derived from scale factor */
if (pstrCodecParams->s16AllocationMethod == SBC_SNR)
{
ps16BitNeed = pstrCodecParams->as16ScaleFactor;
ps16GenBufPtr = ps16BitNeed + (s32Ch * s32NumOfSubBands);
}
else
{
ps16GenBufPtr = ps16BitNeed + (s32Ch*s32NumOfSubBands);
if(s32NumOfSubBands == 4)
{
ps16GenTabPtr = (SINT16 *)
sbc_enc_as16Offset4[pstrCodecParams->s16SamplingFreq];
}
else
{
ps16GenTabPtr = (SINT16 *)
sbc_enc_as16Offset8[pstrCodecParams->s16SamplingFreq];
}
for(s32Sb=0; s32Sb<s32NumOfSubBands; s32Sb++)
{
if(pstrCodecParams->as16ScaleFactor[(s32Ch*s32NumOfSubBands)+s32Sb] == 0)
*(ps16GenBufPtr) = -5;
else
{
s32Loudness =
(SINT32)(pstrCodecParams->as16ScaleFactor[(s32Ch*s32NumOfSubBands)+s32Sb]
- *ps16GenTabPtr);
if(s32Loudness > 0)
*(ps16GenBufPtr) = (SINT16)(s32Loudness >>1);
else
*(ps16GenBufPtr) = (SINT16)s32Loudness;
}
ps16GenBufPtr++;
ps16GenTabPtr++;
}
}
/* max bitneed index is searched*/
s32MaxBitNeed = 0;
ps16GenBufPtr = ps16BitNeed + (s32Ch*s32NumOfSubBands);
for(s32Sb=0; s32Sb<s32NumOfSubBands; s32Sb++)
{
if( *(ps16GenBufPtr) > s32MaxBitNeed)
s32MaxBitNeed = *(ps16GenBufPtr);
ps16GenBufPtr++;
}
ps16GenBufPtr = ps16BitNeed + (s32Ch*s32NumOfSubBands);
/*iterative process to find hwo many bitslices fit into the bitpool*/
s32BitSlice = s32MaxBitNeed + 1;
s32BitCount = pstrCodecParams->s16BitPool;
s32SliceCount = 0;
do
{
s32BitSlice --;
s32BitCount -= s32SliceCount;
s32SliceCount = 0;
for(s32Sb=0; s32Sb<s32NumOfSubBands; s32Sb++)
{
if( (((*ps16GenBufPtr-s32BitSlice)< 16) && ((*ps16GenBufPtr-s32BitSlice) >= 1)))
{
if((*ps16GenBufPtr-s32BitSlice) == 1)
s32SliceCount+=2;
else
s32SliceCount++;
}
ps16GenBufPtr++;
}/*end of for*/
ps16GenBufPtr = ps16BitNeed + (s32Ch*s32NumOfSubBands);
}while((s32BitCount-s32SliceCount)>0);
if(s32BitCount == 0)
{
s32BitCount -= s32SliceCount;
s32BitSlice --;
}
/*Bits are distributed until the last bitslice is reached*/
ps16GenArrPtr = pstrCodecParams->as16Bits+(s32Ch*s32NumOfSubBands);
ps16GenBufPtr = ps16BitNeed + (s32Ch*s32NumOfSubBands);
for(s32Sb=0; s32Sb<s32NumOfSubBands; s32Sb++)
{
if(*(ps16GenBufPtr) < (s32BitSlice+2))
*(ps16GenArrPtr) = 0;
else
*(ps16GenArrPtr) = ((*(ps16GenBufPtr)-s32BitSlice)<16) ?
(SINT16)(*(ps16GenBufPtr)-s32BitSlice) : 16;
ps16GenBufPtr++;
ps16GenArrPtr++;
}
ps16GenArrPtr = pstrCodecParams->as16Bits+(s32Ch*s32NumOfSubBands);
ps16GenBufPtr = ps16BitNeed + (s32Ch*s32NumOfSubBands);
/*the remaining bits are allocated starting at subband 0*/
s32Sb=0;
while( (s32BitCount > 0) && (s32Sb < s32NumOfSubBands) )
{
if( (*(ps16GenArrPtr) >= 2) && (*(ps16GenArrPtr) < 16) )
{
(*(ps16GenArrPtr))++;
s32BitCount--;
}
else if( (*(ps16GenBufPtr) == (s32BitSlice+1)) &&
(s32BitCount > 1) )
{
*(ps16GenArrPtr) = 2;
s32BitCount -= 2;
}
s32Sb++;
ps16GenArrPtr++;
ps16GenBufPtr++;
}
ps16GenArrPtr = pstrCodecParams->as16Bits+(s32Ch*s32NumOfSubBands);
s32Sb=0;
while( (s32BitCount > 0) && (s32Sb < s32NumOfSubBands) )
{
if( *(ps16GenArrPtr) < 16)
{
(*(ps16GenArrPtr))++;
s32BitCount--;
}
s32Sb++;
ps16GenArrPtr++;
}
}
}
/*End of BitAlloc() function*/
component/SBC/encoder/srce/sbc_enc_bit_alloc_ste.c
+213
View File
@@ -0,0 +1,213 @@
/******************************************************************************
*
* Copyright (C) 1999-2012 Broadcom Corporation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
******************************************************************************/
/******************************************************************************
*
* This file contains the code for bit allocation algorithm. It calculates
* the number of bits required for the encoded stream of data.
*
******************************************************************************/
/*Includes*/
#include "sbc_encoder.h"
#include "sbc_enc_func_declare.h"
#include "xc60xx.h"
/*global arrays*/
extern const SINT16 sbc_enc_as16Offset4[4][4];
extern const SINT16 sbc_enc_as16Offset8[4][8];
/****************************************************************************
* BitAlloc - Calculates the required number of bits for the given scale factor
* and the number of subbands.
*
* RETURNS : N/A
*/
/*__attribute__((section("ram_sbc_code")))*/ void sbc_enc_bit_alloc_ste(SBC_ENC_PARAMS *pstrCodecParams)
{
/* CAUTIOM -> mips optim for arm 32 require to use SINT32 instead of SINT16 */
/* Do not change variable type or name */
SINT32 s32MaxBitNeed; /*to store the max bits needed per sb*/
SINT32 s32BitCount; /*the used number of bits*/
SINT32 s32SliceCount; /*to store hwo many slices can be put in bitpool*/
SINT32 s32BitSlice; /*number of bitslices in bitpool*/
SINT32 s32Sb; /*counter for sub-band*/
SINT32 s32Ch; /*counter for channel*/
SINT16 *ps16BitNeed; /*temp memory to store required number of bits*/
SINT32 s32Loudness; /*used in Loudness calculation*/
SINT16 *ps16GenBufPtr,*pas16ScaleFactor;
SINT16 *ps16GenArrPtr;
SINT16 *ps16GenTabPtr;
SINT32 s32NumOfSubBands = pstrCodecParams->s16NumOfSubBands;
SINT32 s32BitPool = pstrCodecParams->s16BitPool;
/* bitneed values are derived from scale factor */
if (pstrCodecParams->s16AllocationMethod == SBC_SNR)
{
ps16BitNeed = pstrCodecParams->as16ScaleFactor;
s32MaxBitNeed = pstrCodecParams->s16MaxBitNeed;
}
else
{
ps16BitNeed = pstrCodecParams->s16ScartchMemForBitAlloc;
pas16ScaleFactor=pstrCodecParams->as16ScaleFactor;
s32MaxBitNeed = 0;
ps16GenBufPtr = ps16BitNeed;
for (s32Ch = 0; s32Ch < 2; s32Ch++)
{
if (s32NumOfSubBands == 4)
{
ps16GenTabPtr = (SINT16 *)sbc_enc_as16Offset4[pstrCodecParams->s16SamplingFreq];
}
else
{
ps16GenTabPtr = (SINT16 *)sbc_enc_as16Offset8[pstrCodecParams->s16SamplingFreq];
}
for (s32Sb = 0; s32Sb < s32NumOfSubBands; s32Sb++)
{
if (*pas16ScaleFactor == 0)
*ps16GenBufPtr = -5;
else
{
s32Loudness = (SINT32)(*pas16ScaleFactor - *ps16GenTabPtr);
if (s32Loudness > 0)
*ps16GenBufPtr = (SINT16)(s32Loudness >> 1);
else
*ps16GenBufPtr = (SINT16)s32Loudness;
}
if (*ps16GenBufPtr > s32MaxBitNeed)
s32MaxBitNeed = *ps16GenBufPtr;
pas16ScaleFactor++;
ps16GenBufPtr++;
ps16GenTabPtr++;
}
}
}
/* iterative process to find out hwo many bitslices fit into the bitpool */
s32BitSlice = s32MaxBitNeed + 1;
s32BitCount = s32BitPool;
s32SliceCount = 0;
do
{
s32BitSlice --;
s32BitCount -= s32SliceCount;
s32SliceCount = 0;
ps16GenBufPtr = ps16BitNeed;
for (s32Sb = 0; s32Sb < (2*s32NumOfSubBands); s32Sb++)
{
if ( (*ps16GenBufPtr >= (s32BitSlice + 1)) && (*ps16GenBufPtr < (s32BitSlice + 16)) )
{
if (*(ps16GenBufPtr) == (s32BitSlice+1))
s32SliceCount += 2;
else
s32SliceCount++;
}
ps16GenBufPtr++;
}
} while ((s32BitCount-s32SliceCount)>0);
if ((s32BitCount-s32SliceCount) == 0)
{
s32BitCount -= s32SliceCount;
s32BitSlice --;
}
/* Bits are distributed until the last bitslice is reached */
ps16GenBufPtr = ps16BitNeed;
ps16GenArrPtr = pstrCodecParams->as16Bits;
for (s32Ch = 0; s32Ch < 2; s32Ch++)
{
for (s32Sb = 0; s32Sb < s32NumOfSubBands; s32Sb++)
{
if (*ps16GenBufPtr < (s32BitSlice+2))
*ps16GenArrPtr = 0;
else
*ps16GenArrPtr = ((*(ps16GenBufPtr)-s32BitSlice) < 16) ?
(SINT16)(*(ps16GenBufPtr)-s32BitSlice):16;
ps16GenBufPtr++;
ps16GenArrPtr++;
}
}
/* the remaining bits are allocated starting at subband 0 */
s32Ch=0;
s32Sb=0;
ps16GenBufPtr = ps16BitNeed;
ps16GenArrPtr -= 2*s32NumOfSubBands;
while ( (s32BitCount > 0) && (s32Sb < s32NumOfSubBands) )
{
if ( (*(ps16GenArrPtr) >= 2) && (*(ps16GenArrPtr) < 16) )
{
(*(ps16GenArrPtr))++;
s32BitCount--;
}
else if ((*ps16GenBufPtr == (s32BitSlice+1)) && (s32BitCount > 1))
{
*(ps16GenArrPtr) = 2;
s32BitCount -= 2;
}
if(s32Ch == 1)
{
s32Ch = 0;
s32Sb++;
ps16GenBufPtr = ps16BitNeed+s32Sb;
ps16GenArrPtr = pstrCodecParams->as16Bits+s32Sb;
}
else
{
s32Ch =1;
ps16GenBufPtr = ps16BitNeed+s32NumOfSubBands+s32Sb;
ps16GenArrPtr = pstrCodecParams->as16Bits+s32NumOfSubBands+s32Sb;
}
}
s32Ch=0;
s32Sb=0;
ps16GenArrPtr = pstrCodecParams->as16Bits;
while ((s32BitCount >0) && (s32Sb < s32NumOfSubBands))
{
if(*(ps16GenArrPtr) < 16)
{
(*(ps16GenArrPtr))++;
s32BitCount--;
}
if (s32Ch == 1)
{
s32Ch = 0;
s32Sb++;
ps16GenArrPtr = pstrCodecParams->as16Bits+s32Sb;
}
else
{
s32Ch = 1;
ps16GenArrPtr = pstrCodecParams->as16Bits+s32NumOfSubBands+s32Sb;
}
}
}
/*End of BitAlloc() function*/
component/SBC/encoder/srce/sbc_enc_coeffs.c
+319
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@@ -0,0 +1,319 @@
/******************************************************************************
*
* Copyright (C) 1999-2012 Broadcom Corporation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
******************************************************************************/
/******************************************************************************
*
* This file contains the Windowing coeffs for synthesis filter
*
******************************************************************************/
#include "sbc_encoder.h"
#if (SBC_ARM_ASM_OPT==FALSE && SBC_IPAQ_OPT==FALSE)
#if (SBC_IS_64_MULT_IN_WINDOW_ACCU == FALSE)
/*Window coeff for 4 sub band case*/
const SINT16 gas32CoeffFor4SBs[] =
{
(SINT16)((SINT32)0x00000000 >> 16), (SINT16)0x00000000,
(SINT16)((SINT32)0x001194E6 >> 16), (SINT16)0x001194E6,
(SINT16)((SINT32)0x0030E2D3 >> 16), (SINT16)0x0030E2D3,
(SINT16)((SINT32)0x00599403 >> 16), (SINT16)0x00599403,
(SINT16)((SINT32)0x007DBCC8 >> 16), (SINT16)0x007DBCC8,
(SINT16)((SINT32)0x007F88E4 >> 16), (SINT16)0x007F88E4,
(SINT16)((SINT32)0x003D239B >> 16), (SINT16)0x003D239B,
(SINT16)((SINT32)0xFF9BB9D5 >> 16), (SINT16)0xFF9BB9D5,
(SINT16)((SINT32)0x01659F45 >> 16), (SINT16)0x01659F45,
(SINT16)((SINT32)0x029DBAA3 >> 16), (SINT16)0x029DBAA3,
(SINT16)((SINT32)0x03B23341 >> 16), (SINT16)0x03B23341,
(SINT16)((SINT32)0x041EEE40 >> 16), (SINT16)0x041EEE40,
(SINT16)((SINT32)0x034FEE2C >> 16), (SINT16)0x034FEE2C,
(SINT16)((SINT32)0x00C8F2BC >> 16), (SINT16)0x00C8F2BC,
(SINT16)((SINT32)0xFC4F91D4 >> 16), (SINT16)0xFC4F91D4,
(SINT16)((SINT32)0xF60FAF37 >> 16), (SINT16)0xF60FAF37,
(SINT16)((SINT32)0x115B1ED2 >> 16), (SINT16)0x115B1ED2,
(SINT16)((SINT32)0x18F55C90 >> 16), (SINT16)0x18F55C90,
(SINT16)((SINT32)0x1F91CA46 >> 16), (SINT16)0x1F91CA46,
(SINT16)((SINT32)0x2412F251 >> 16), (SINT16)0x2412F251,
(SINT16)((SINT32)0x25AC1FF2 >> 16), (SINT16)0x25AC1FF2,
(SINT16)((SINT32)0x2412F251 >> 16), (SINT16)0x2412F251,
(SINT16)((SINT32)0x1F91CA46 >> 16), (SINT16)0x1F91CA46,
(SINT16)((SINT32)0x18F55C90 >> 16), (SINT16)0x18F55C90,
(SINT16)((SINT32)0xEEA4E12E >> 16), (SINT16)0xEEA4E12E,
(SINT16)((SINT32)0xF60FAF37 >> 16), (SINT16)0xF60FAF37,
(SINT16)((SINT32)0xFC4F91D4 >> 16), (SINT16)0xFC4F91D4,
(SINT16)((SINT32)0x00C8F2BC >> 16), (SINT16)0x00C8F2BC,
(SINT16)((SINT32)0x034FEE2C >> 16), (SINT16)0x034FEE2C,
(SINT16)((SINT32)0x041EEE40 >> 16), (SINT16)0x041EEE40,
(SINT16)((SINT32)0x03B23341 >> 16), (SINT16)0x03B23341,
(SINT16)((SINT32)0x029DBAA3 >> 16), (SINT16)0x029DBAA3,
(SINT16)((SINT32)0xFE9A60BB >> 16), (SINT16)0xFE9A60BB,
(SINT16)((SINT32)0xFF9BB9D5 >> 16), (SINT16)0xFF9BB9D5,
(SINT16)((SINT32)0x003D239B >> 16), (SINT16)0x003D239B,
(SINT16)((SINT32)0x007F88E4 >> 16), (SINT16)0x007F88E4,
(SINT16)((SINT32)0x007DBCC8 >> 16), (SINT16)0x007DBCC8,
(SINT16)((SINT32)0x00599403 >> 16), (SINT16)0x00599403,
(SINT16)((SINT32)0x0030E2D3 >> 16), (SINT16)0x0030E2D3,
(SINT16)((SINT32)0x001194E6 >> 16), (SINT16)0x001194E6
};
/*Window coeff for 8 sub band case*/
const SINT16 gas32CoeffFor8SBs[] =
{
(SINT16)((SINT32)0x00000000 >>16), (SINT16)0x00000000,
(SINT16)((SINT32)0x00052173 >>16), (SINT16)0x00052173,
(SINT16)((SINT32)0x000B3F71 >>16), (SINT16)0x000B3F71,
(SINT16)((SINT32)0x00122C7D >>16), (SINT16)0x00122C7D,
(SINT16)((SINT32)0x001AFF89 >>16), (SINT16)0x001AFF89,
(SINT16)((SINT32)0x00255A62 >>16), (SINT16)0x00255A62,
(SINT16)((SINT32)0x003060F4 >>16), (SINT16)0x003060F4,
(SINT16)((SINT32)0x003A72E7 >>16), (SINT16)0x003A72E7,
(SINT16)((SINT32)0x0041EC6A >>16), (SINT16)0x0041EC6A, /* 8 */
(SINT16)((SINT32)0x0044EF48 >>16), (SINT16)0x0044EF48,
(SINT16)((SINT32)0x00415B75 >>16), (SINT16)0x00415B75,
(SINT16)((SINT32)0x0034F8B6 >>16), (SINT16)0x0034F8B6,
(SINT16)((SINT32)0x001D8FD2 >>16), (SINT16)0x001D8FD2,
(SINT16)((SINT32)0xFFFA2413 >>16), (SINT16)0xFFFA2413,
(SINT16)((SINT32)0xFFC9F10E >>16), (SINT16)0xFFC9F10E,
(SINT16)((SINT32)0xFF8D6793 >>16), (SINT16)0xFF8D6793,
(SINT16)((SINT32)0x00B97348 >>16), (SINT16)0x00B97348, /* 16 */
(SINT16)((SINT32)0x01071B96 >>16), (SINT16)0x01071B96,
(SINT16)((SINT32)0x0156B3CA >>16), (SINT16)0x0156B3CA,
(SINT16)((SINT32)0x01A1B38B >>16), (SINT16)0x01A1B38B,
(SINT16)((SINT32)0x01E0224C >>16), (SINT16)0x01E0224C,
(SINT16)((SINT32)0x0209291F >>16), (SINT16)0x0209291F,
(SINT16)((SINT32)0x02138653 >>16), (SINT16)0x02138653,
(SINT16)((SINT32)0x01F5F424 >>16), (SINT16)0x01F5F424,
(SINT16)((SINT32)0x01A7ECEF >>16), (SINT16)0x01A7ECEF, /* 24 */
(SINT16)((SINT32)0x01223EBA >>16), (SINT16)0x01223EBA,
(SINT16)((SINT32)0x005FD0FF >>16), (SINT16)0x005FD0FF,
(SINT16)((SINT32)0xFF5EEB73 >>16), (SINT16)0xFF5EEB73,
(SINT16)((SINT32)0xFE20435D >>16), (SINT16)0xFE20435D,
(SINT16)((SINT32)0xFCA86E7E >>16), (SINT16)0xFCA86E7E,
(SINT16)((SINT32)0xFAFF95FC >>16), (SINT16)0xFAFF95FC,
(SINT16)((SINT32)0xF9312891 >>16), (SINT16)0xF9312891,
(SINT16)((SINT32)0x08B4307A >>16), (SINT16)0x08B4307A, /* 32 */
(SINT16)((SINT32)0x0A9F3E9A >>16), (SINT16)0x0A9F3E9A,
(SINT16)((SINT32)0x0C7D59B6 >>16), (SINT16)0x0C7D59B6,
(SINT16)((SINT32)0x0E3BB16F >>16), (SINT16)0x0E3BB16F,
(SINT16)((SINT32)0x0FC721F9 >>16), (SINT16)0x0FC721F9,
(SINT16)((SINT32)0x110ECEF0 >>16), (SINT16)0x110ECEF0,
(SINT16)((SINT32)0x120435FA >>16), (SINT16)0x120435FA,
(SINT16)((SINT32)0x129C226F >>16), (SINT16)0x129C226F,
(SINT16)((SINT32)0x12CF6C75 >>16), (SINT16)0x12CF6C75, /* 40 */
(SINT16)((SINT32)0x129C226F >>16), (SINT16)0x129C226F,
(SINT16)((SINT32)0x120435FA >>16), (SINT16)0x120435FA,
(SINT16)((SINT32)0x110ECEF0 >>16), (SINT16)0x110ECEF0,
(SINT16)((SINT32)0x0FC721F9 >>16), (SINT16)0x0FC721F9,
(SINT16)((SINT32)0x0E3BB16F >>16), (SINT16)0x0E3BB16F,
(SINT16)((SINT32)0x0C7D59B6 >>16), (SINT16)0x0C7D59B6,
(SINT16)((SINT32)0x0A9F3E9A >>16), (SINT16)0x0A9F3E9A,
(SINT16)((SINT32)0xF74BCF86 >>16), (SINT16)0xF74BCF86, /* 48 */
(SINT16)((SINT32)0xF9312891 >>16), (SINT16)0xF9312891,
(SINT16)((SINT32)0xFAFF95FC >>16), (SINT16)0xFAFF95FC,
(SINT16)((SINT32)0xFCA86E7E >>16), (SINT16)0xFCA86E7E,
(SINT16)((SINT32)0xFE20435D >>16), (SINT16)0xFE20435D,
(SINT16)((SINT32)0xFF5EEB73 >>16), (SINT16)0xFF5EEB73,
(SINT16)((SINT32)0x005FD0FF >>16), (SINT16)0x005FD0FF,
(SINT16)((SINT32)0x01223EBA >>16), (SINT16)0x01223EBA,
(SINT16)((SINT32)0x01A7ECEF >>16), (SINT16)0x01A7ECEF, /* 56 */
(SINT16)((SINT32)0x01F5F424 >>16), (SINT16)0x01F5F424,
(SINT16)((SINT32)0x02138653 >>16), (SINT16)0x02138653,
(SINT16)((SINT32)0x0209291F >>16), (SINT16)0x0209291F,
(SINT16)((SINT32)0x01E0224C >>16), (SINT16)0x01E0224C,
(SINT16)((SINT32)0x01A1B38B >>16), (SINT16)0x01A1B38B,
(SINT16)((SINT32)0x0156B3CA >>16), (SINT16)0x0156B3CA,
(SINT16)((SINT32)0x01071B96 >>16), (SINT16)0x01071B96,
(SINT16)((SINT32)0xFF468CB8 >>16), (SINT16)0xFF468CB8, /* 64 */
(SINT16)((SINT32)0xFF8D6793 >>16), (SINT16)0xFF8D6793,
(SINT16)((SINT32)0xFFC9F10E >>16), (SINT16)0xFFC9F10E,
(SINT16)((SINT32)0xFFFA2413 >>16), (SINT16)0xFFFA2413,
(SINT16)((SINT32)0x001D8FD2 >>16), (SINT16)0x001D8FD2,
(SINT16)((SINT32)0x0034F8B6 >>16), (SINT16)0x0034F8B6,
(SINT16)((SINT32)0x00415B75 >>16), (SINT16)0x00415B75,
(SINT16)((SINT32)0x0044EF48 >>16), (SINT16)0x0044EF48,
(SINT16)((SINT32)0x0041EC6A >>16), (SINT16)0x0041EC6A, /* 72 */
(SINT16)((SINT32)0x003A72E7 >>16), (SINT16)0x003A72E7,
(SINT16)((SINT32)0x003060F4 >>16), (SINT16)0x003060F4,
(SINT16)((SINT32)0x00255A62 >>16), (SINT16)0x00255A62,
(SINT16)((SINT32)0x001AFF89 >>16), (SINT16)0x001AFF89,
(SINT16)((SINT32)0x00122C7D >>16), (SINT16)0x00122C7D,
(SINT16)((SINT32)0x000B3F71 >>16), (SINT16)0x000B3F71,
(SINT16)((SINT32)0x00052173 >>16), (SINT16)0x00052173
};
#else
/*Window coeff for 4 sub band case*/
const SINT32 gas32CoeffFor4SBs[] =
{
(SINT32)0x00000000,
(SINT32)0x001194E6,
(SINT32)0x0030E2D3,
(SINT32)0x00599403,
(SINT32)0x007DBCC8,
(SINT32)0x007F88E4,
(SINT32)0x003D239B,
(SINT32)0xFF9BB9D5,
(SINT32)0x01659F45,
(SINT32)0x029DBAA3,
(SINT32)0x03B23341,
(SINT32)0x041EEE40,
(SINT32)0x034FEE2C,
(SINT32)0x00C8F2BC,
(SINT32)0xFC4F91D4,
(SINT32)0xF60FAF37,
(SINT32)0x115B1ED2,
(SINT32)0x18F55C90,
(SINT32)0x1F91CA46,
(SINT32)0x2412F251,
(SINT32)0x25AC1FF2,
(SINT32)0x2412F251,
(SINT32)0x1F91CA46,
(SINT32)0x18F55C90,
(SINT32)0xEEA4E12E,
(SINT32)0xF60FAF37,
(SINT32)0xFC4F91D4,
(SINT32)0x00C8F2BC,
(SINT32)0x034FEE2C,
(SINT32)0x041EEE40,
(SINT32)0x03B23341,
(SINT32)0x029DBAA3,
(SINT32)0xFE9A60BB,
(SINT32)0xFF9BB9D5,
(SINT32)0x003D239B,
(SINT32)0x007F88E4,
(SINT32)0x007DBCC8,
(SINT32)0x00599403,
(SINT32)0x0030E2D3,
(SINT32)0x001194E6
};
/*Window coeff for 8 sub band case*/
const SINT32 gas32CoeffFor8SBs[] =
{
(SINT32)0x00000000,
(SINT32)0x00052173,
(SINT32)0x000B3F71,
(SINT32)0x00122C7D,
(SINT32)0x001AFF89,
(SINT32)0x00255A62,
(SINT32)0x003060F4,
(SINT32)0x003A72E7,
(SINT32)0x0041EC6A, /* 8 */
(SINT32)0x0044EF48,
(SINT32)0x00415B75,
(SINT32)0x0034F8B6,
(SINT32)0x001D8FD2,
(SINT32)0xFFFA2413,
(SINT32)0xFFC9F10E,
(SINT32)0xFF8D6793,
(SINT32)0x00B97348, /* 16 */
(SINT32)0x01071B96,
(SINT32)0x0156B3CA,
(SINT32)0x01A1B38B,
(SINT32)0x01E0224C,
(SINT32)0x0209291F,
(SINT32)0x02138653,
(SINT32)0x01F5F424,
(SINT32)0x01A7ECEF, /* 24 */
(SINT32)0x01223EBA,
(SINT32)0x005FD0FF,
(SINT32)0xFF5EEB73,
(SINT32)0xFE20435D,
(SINT32)0xFCA86E7E,
(SINT32)0xFAFF95FC,
(SINT32)0xF9312891,
(SINT32)0x08B4307A, /* 32 */
(SINT32)0x0A9F3E9A,
(SINT32)0x0C7D59B6,
(SINT32)0x0E3BB16F,
(SINT32)0x0FC721F9,
(SINT32)0x110ECEF0,
(SINT32)0x120435FA,
(SINT32)0x129C226F,
(SINT32)0x12CF6C75, /* 40 */
(SINT32)0x129C226F,
(SINT32)0x120435FA,
(SINT32)0x110ECEF0,
(SINT32)0x0FC721F9,
(SINT32)0x0E3BB16F,
(SINT32)0x0C7D59B6,
(SINT32)0x0A9F3E9A,
(SINT32)0xF74BCF86, /* 48 */
(SINT32)0xF9312891,
(SINT32)0xFAFF95FC,
(SINT32)0xFCA86E7E,
(SINT32)0xFE20435D,
(SINT32)0xFF5EEB73,
(SINT32)0x005FD0FF,
(SINT32)0x01223EBA,
(SINT32)0x01A7ECEF, /* 56 */
(SINT32)0x01F5F424,
(SINT32)0x02138653,
(SINT32)0x0209291F,
(SINT32)0x01E0224C,
(SINT32)0x01A1B38B,
(SINT32)0x0156B3CA,
(SINT32)0x01071B96,
(SINT32)0xFF468CB8, /* 64 */
(SINT32)0xFF8D6793,
(SINT32)0xFFC9F10E,
(SINT32)0xFFFA2413,
(SINT32)0x001D8FD2,
(SINT32)0x0034F8B6,
(SINT32)0x00415B75,
(SINT32)0x0044EF48,
(SINT32)0x0041EC6A, /* 72 */
(SINT32)0x003A72E7,
(SINT32)0x003060F4,
(SINT32)0x00255A62,
(SINT32)0x001AFF89,
(SINT32)0x00122C7D,
(SINT32)0x000B3F71,
(SINT32)0x00052173
};
#endif
#endif
component/SBC/encoder/srce/sbc_encoder.c
+314
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@@ -0,0 +1,314 @@
/******************************************************************************
*
* Copyright (C) 1999-2012 Broadcom Corporation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
******************************************************************************/
/******************************************************************************
*
* contains code for encoder flow and initalization of encoder
*
******************************************************************************/
#include <string.h>
#include "sbc_encoder.h"
#include "sbc_enc_func_declare.h"
#include "xc60xx.h"
SINT16 EncMaxShiftCounter;
#if (SBC_JOINT_STE_INCLUDED == TRUE)
SINT32 s32LRDiff[SBC_MAX_NUM_OF_BLOCKS] = {0};
SINT32 s32LRSum[SBC_MAX_NUM_OF_BLOCKS] = {0};
#endif
__attribute__((section("ram_sbc_code"))) void SBC_Encoder(SBC_ENC_PARAMS *pstrEncParams)
{
SINT32 s32Ch; /* counter for ch*/
SINT32 s32Sb; /* counter for sub-band*/
UINT32 u32Count, maxBit = 0; /* loop count*/
SINT32 s32MaxValue; /* temp variable to store max value */
SINT16 *ps16ScfL;
SINT32 *SbBuffer;
SINT32 s32Blk; /* counter for block*/
SINT32 s32NumOfBlocks = pstrEncParams->s16NumOfBlocks;
#if (SBC_JOINT_STE_INCLUDED == TRUE)
SINT32 s32MaxValue2;
UINT32 u32CountSum,u32CountDiff;
SINT32 *pSum, *pDiff;
#endif
register SINT32 s32NumOfSubBands = pstrEncParams->s16NumOfSubBands;
pstrEncParams->pu8NextPacket = pstrEncParams->pu8Packet;
#if (SBC_NO_PCM_CPY_OPTION == TRUE)
pstrEncParams->ps16NextPcmBuffer = pstrEncParams->ps16PcmBuffer;
#else
pstrEncParams->ps16NextPcmBuffer = pstrEncParams->as16PcmBuffer;
#endif
do
{
/* SBC ananlysis filter*/
if (s32NumOfSubBands == 4)
SbcAnalysisFilter4(pstrEncParams);
else
SbcAnalysisFilter8(pstrEncParams);
/* compute the scale factor, and save the max */
ps16ScfL = pstrEncParams->as16ScaleFactor;
s32Ch=pstrEncParams->s16NumOfChannels*s32NumOfSubBands;
pstrEncParams->ps16NextPcmBuffer+=s32Ch*s32NumOfBlocks; /* in case of multible sbc frame to encode update the pcm pointer */
for (s32Sb=0; s32Sb<s32Ch; s32Sb++)
{
SbBuffer=pstrEncParams->s32SbBuffer+s32Sb;
s32MaxValue=0;
for (s32Blk=s32NumOfBlocks;s32Blk>0;s32Blk--)
{
if (s32MaxValue<abs32(*SbBuffer))
s32MaxValue=abs32(*SbBuffer);
SbBuffer+=s32Ch;
}
u32Count = (s32MaxValue > 0x800000) ? 9 : 0;
for ( ; u32Count < 15; u32Count++)
{
if (s32MaxValue <= (SINT32)(0x8000 << u32Count))
break;
}
*ps16ScfL++ = (SINT16)u32Count;
if (u32Count > maxBit)
maxBit = u32Count;
}
/* In case of JS processing,check whether to use JS */
#if (SBC_JOINT_STE_INCLUDED == TRUE)
if (pstrEncParams->s16ChannelMode == SBC_JOINT_STEREO)
{
/* Calculate sum and differance scale factors for making JS decision */
ps16ScfL = pstrEncParams->as16ScaleFactor ;
/* calculate the scale factor of Joint stereo max sum and diff */
for (s32Sb = 0; s32Sb < (s32NumOfSubBands-1); s32Sb++)
{
SbBuffer=pstrEncParams->s32SbBuffer+s32Sb;
s32MaxValue2=0;
s32MaxValue=0;
pSum = s32LRSum;
pDiff = s32LRDiff;
for (s32Blk=0;s32Blk<s32NumOfBlocks;s32Blk++)
{
*pSum=(*SbBuffer+*(SbBuffer+s32NumOfSubBands))>>1;
if (abs32(*pSum)>s32MaxValue)
s32MaxValue=abs32(*pSum);
pSum++;
*pDiff=(*SbBuffer-*(SbBuffer+s32NumOfSubBands))>>1;
if (abs32(*pDiff)>s32MaxValue2)
s32MaxValue2=abs32(*pDiff);
pDiff++;
SbBuffer+=s32Ch;
}
u32Count = (s32MaxValue > 0x800000) ? 9 : 0;
for ( ; u32Count < 15; u32Count++)
{
if (s32MaxValue <= (SINT32)(0x8000 << u32Count))
break;
}
u32CountSum=u32Count;
u32Count = (s32MaxValue2 > 0x800000) ? 9 : 0;
for ( ; u32Count < 15; u32Count++)
{
if (s32MaxValue2 <= (SINT32)(0x8000 << u32Count))
break;
}
u32CountDiff=u32Count;
if ( (*ps16ScfL + *(ps16ScfL+s32NumOfSubBands)) > (SINT16)(u32CountSum + u32CountDiff) )
{
if (u32CountSum > maxBit)
maxBit = u32CountSum;
if (u32CountDiff > maxBit)
maxBit = u32CountDiff;
*ps16ScfL = (SINT16)u32CountSum;
*(ps16ScfL+s32NumOfSubBands) = (SINT16)u32CountDiff;
SbBuffer=pstrEncParams->s32SbBuffer+s32Sb;
pSum = s32LRSum;
pDiff = s32LRDiff;
for (s32Blk = 0; s32Blk < s32NumOfBlocks; s32Blk++)
{
*SbBuffer = *pSum;
*(SbBuffer+s32NumOfSubBands) = *pDiff;
SbBuffer += s32NumOfSubBands<<1;
pSum++;
pDiff++;
}
pstrEncParams->as16Join[s32Sb] = 1;
}
else
{
pstrEncParams->as16Join[s32Sb] = 0;
}
ps16ScfL++;
}
pstrEncParams->as16Join[s32Sb] = 0;
}
#endif
pstrEncParams->s16MaxBitNeed = (SINT16)maxBit;
/* bit allocation */
if ((pstrEncParams->s16ChannelMode == SBC_STEREO) || (pstrEncParams->s16ChannelMode == SBC_JOINT_STEREO))
sbc_enc_bit_alloc_ste(pstrEncParams);
else
sbc_enc_bit_alloc_mono(pstrEncParams);
/* save the beginning of the frame. pu8NextPacket is modified in EncPacking() */
// pu8 = pstrEncParams->pu8NextPacket;
/* Quantize the encoded audio */
EncPacking(pstrEncParams);
}
while(--(pstrEncParams->u8NumPacketToEncode));
pstrEncParams->u8NumPacketToEncode = 1; /* default is one for retrocompatibility purpose */
}
/****************************************************************************
* InitSbcAnalysisFilt - Initalizes the input data to 0
*
* RETURNS : N/A
*/
void SBC_Encoder_Init(SBC_ENC_PARAMS *pstrEncParams)
{
// UINT16 s16SamplingFreq; /*temp variable to store smpling freq*/
SINT16 s16Bitpool; /*to store bit pool value*/
// SINT16 s16BitRate; /*to store bitrate*/
// SINT16 s16FrameLen; /*to store frame length*/
UINT16 HeaderParams;
pstrEncParams->u8NumPacketToEncode = 1; /* default is one for retrocompatibility purpose */
/* Required number of channels */
if (pstrEncParams->s16ChannelMode == SBC_MONO)
pstrEncParams->s16NumOfChannels = 1;
else
pstrEncParams->s16NumOfChannels = 2;
/* BK4BTSTACK_CHANGE START */
/* Bit pool calculation */
// if (pstrEncParams->s16SamplingFreq == SBC_sf16000)
// s16SamplingFreq = 16000;
// else if (pstrEncParams->s16SamplingFreq == SBC_sf32000)
// s16SamplingFreq = 32000;
// else if (pstrEncParams->s16SamplingFreq == SBC_sf44100)
// s16SamplingFreq = 44100;
// else
// s16SamplingFreq = 48000;
/* BK4BTSTACK_CHANGE END */
if ( (pstrEncParams->s16ChannelMode == SBC_JOINT_STEREO)
|| (pstrEncParams->s16ChannelMode == SBC_STEREO) )
{
/* BK4BTSTACK_CHANGE START */
// s16Bitpool = (SINT16)( (pstrEncParams->u16BitRate *
// pstrEncParams->s16NumOfSubBands * 1000 / s16SamplingFreq)
// -( (32 + (4 * pstrEncParams->s16NumOfSubBands *
// pstrEncParams->s16NumOfChannels)
// + ( (pstrEncParams->s16ChannelMode - 2) *
// pstrEncParams->s16NumOfSubBands ) )
// / pstrEncParams->s16NumOfBlocks) );
s16Bitpool = pstrEncParams->s16BitPool;
// s16FrameLen = 4 + (4*pstrEncParams->s16NumOfSubBands*
// pstrEncParams->s16NumOfChannels)/8
// + ( ((pstrEncParams->s16ChannelMode - 2) *
// pstrEncParams->s16NumOfSubBands)
// + (pstrEncParams->s16NumOfBlocks * s16Bitpool) ) / 8;
// s16BitRate = (8 * s16FrameLen * s16SamplingFreq)
// / (pstrEncParams->s16NumOfSubBands *
// pstrEncParams->s16NumOfBlocks * 1000);
// if (s16BitRate > pstrEncParams->u16BitRate)
// s16Bitpool--;
/* BK4BTSTACK_CHANGE END */
if(pstrEncParams->s16NumOfSubBands == 8)
pstrEncParams->s16BitPool = (s16Bitpool > 255) ? 255 : s16Bitpool;
else
pstrEncParams->s16BitPool = (s16Bitpool > 128) ? 128 : s16Bitpool;
}
else
{
if (!pstrEncParams->mSBCEnabled){
/* BK4BTSTACK_CHANGE START */
// s16Bitpool = (SINT16)( ((pstrEncParams->s16NumOfSubBands *
// pstrEncParams->u16BitRate * 1000)
// / (s16SamplingFreq * pstrEncParams->s16NumOfChannels))
// -( ( (32 / pstrEncParams->s16NumOfChannels) +
// (4 * pstrEncParams->s16NumOfSubBands) )
// / pstrEncParams->s16NumOfBlocks ) );
s16Bitpool = pstrEncParams->s16BitPool;
/* BK4BTSTACK_CHANGE END */
pstrEncParams->s16BitPool = (s16Bitpool >
(16 * pstrEncParams->s16NumOfSubBands))
? (16*pstrEncParams->s16NumOfSubBands) : s16Bitpool;
}
}
if (pstrEncParams->s16BitPool < 0)
pstrEncParams->s16BitPool = 0;
/* sampling freq */
HeaderParams = ((pstrEncParams->s16SamplingFreq & 3)<< 6);
/* number of blocks*/
HeaderParams |= (((pstrEncParams->s16NumOfBlocks -4) & 12) << 2);
/* channel mode: mono, dual...*/
HeaderParams |= ((pstrEncParams->s16ChannelMode & 3)<< 2);
/* Loudness or SNR */
HeaderParams |= ((pstrEncParams->s16AllocationMethod & 1)<< 1);
HeaderParams |= ((pstrEncParams->s16NumOfSubBands >> 3) & 1); /*4 or 8*/
pstrEncParams->FrameHeader=HeaderParams;
if (pstrEncParams->s16NumOfSubBands==4)
{
if (pstrEncParams->s16NumOfChannels==1)
pstrEncParams->EncMaxShiftCounter=((ENC_VX_BUFFER_SIZE-(4*10))>>2)<<2;
else
pstrEncParams->EncMaxShiftCounter=((ENC_VX_BUFFER_SIZE-(4*10*2))>>3)<<2;
}
else
{
if (pstrEncParams->s16NumOfChannels==1)
pstrEncParams->EncMaxShiftCounter=((ENC_VX_BUFFER_SIZE-(8*10))>>3)<<3;
else
pstrEncParams->EncMaxShiftCounter=((ENC_VX_BUFFER_SIZE-(8*10*2))>>4)<<3;
}
// APPL_TRACE_EVENT("SBC_Encoder_Init : bitrate %d, bitpool %d",
// pstrEncParams->u16BitRate, pstrEncParams->s16BitPool);
SbcAnalysisInit(pstrEncParams);
}
component/SBC/encoder/srce/sbc_packing.c
+294
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@@ -0,0 +1,294 @@
/******************************************************************************
*
* Copyright (C) 1999-2012 Broadcom Corporation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at:
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
******************************************************************************/
/******************************************************************************
*
* This file contains code for packing the Encoded data into bit streams.
*
******************************************************************************/
#include "sbc_encoder.h"
#include "sbc_enc_func_declare.h"
#include <stddef.h>
#include "xc60xx.h"
#if (SBC_ARM_ASM_OPT==TRUE)
#define Mult32(s32In1,s32In2,s32OutLow) \
{ \
__asm \
{ \
MUL s32OutLow,s32In1,s32In2; \
} \
}
#define Mult64(s32In1, s32In2, s32OutLow, s32OutHi) \
{ \
__asm \
{ \
SMULL s32OutLow,s32OutHi,s32In1,s32In2 \
} \
}
#else
#define Mult32(s32In1,s32In2,s32OutLow) s32OutLow=(SINT32)s32In1*(SINT32)s32In2;
#define Mult64(s32In1, s32In2, s32OutLow, s32OutHi) \
{ \
s32OutLow = ((SINT32)(UINT16)s32In1 * (UINT16)s32In2); \
s32TempVal2 = (SINT32)((s32In1 >> 16) * (UINT16)s32In2); \
s32Carry = ( (((UINT32)(s32OutLow)>>16)&0xFFFF) + \
+ (s32TempVal2 & 0xFFFF) ) >> 16; \
s32OutLow += (s32TempVal2 << 16); \
s32OutHi = (s32TempVal2 >> 16) + s32Carry; \
}
#endif
__attribute__((section("ram_sbc_code"))) void EncPacking(SBC_ENC_PARAMS *pstrEncParams)
{
UINT8 *pu8PacketPtr; /* packet ptr*/
UINT8 Temp;
SINT32 s32Blk; /* counter for block*/
SINT32 s32Ch; /* counter for channel*/
SINT32 s32Sb; /* counter for sub-band*/
SINT32 s32PresentBit; /* represents bit to be stored*/
/*SINT32 s32LoopCountI; loop counter*/
SINT32 s32LoopCountJ; /* loop counter*/
UINT32 u32QuantizedSbValue,u32QuantizedSbValue0; /* temp variable to store quantized sb val*/
SINT32 s32LoopCount; /* loop counter*/
UINT8 u8XoredVal; /* to store XORed value in CRC calculation*/
UINT8 u8CRC; /* to store CRC value*/
SINT16 *ps16GenPtr;
SINT32 s32NumOfBlocks;
SINT32 s32NumOfSubBands = pstrEncParams->s16NumOfSubBands;
SINT32 s32NumOfChannels = pstrEncParams->s16NumOfChannels;
UINT32 u32SfRaisedToPow2; /*scale factor raised to power 2*/
SINT16 *ps16ScfPtr;
SINT32 *ps32SbPtr;
UINT16 u16Levels; /*to store levels*/
SINT32 s32Temp1; /*used in 64-bit multiplication*/
SINT32 s32Low; /*used in 64-bit multiplication*/
#if (SBC_IS_64_MULT_IN_QUANTIZER==TRUE)
SINT32 s32Hi1,s32Low1,s32Carry,s32TempVal2,s32Hi, s32Temp2;
#endif
pu8PacketPtr = pstrEncParams->pu8NextPacket; /*Initialize the ptr*/
/* BK4BTSTACK_CHANGE START */
uint8_t * reserved_ptr = NULL;
if (pstrEncParams->mSBCEnabled){
*pu8PacketPtr++ = (UINT8)0xAD; /*Sync word*/
reserved_ptr = pu8PacketPtr;
} else {
*pu8PacketPtr++ = (UINT8)0x9C; /*Sync word*/
}
/* BK4BTSTACK_CHANGE END */
*pu8PacketPtr++=(UINT8)(pstrEncParams->FrameHeader);
*pu8PacketPtr = (UINT8)(pstrEncParams->s16BitPool & 0x00FF);
pu8PacketPtr += 2; /*skip for CRC*/
/*here it indicate if it is byte boundary or nibble boundary*/
s32PresentBit = 8;
Temp=0;
#if (SBC_JOINT_STE_INCLUDED == TRUE)
if (pstrEncParams->s16ChannelMode == SBC_JOINT_STEREO)
{
/* pack join stero parameters */
for (s32Sb = 0; s32Sb < s32NumOfSubBands; s32Sb++)
{
Temp <<= 1;
Temp |= pstrEncParams->as16Join[s32Sb];
}
/* pack RFA */
if (s32NumOfSubBands == SUB_BANDS_4)
{
s32PresentBit = 4;
}
else
{
*(pu8PacketPtr++)=Temp;
Temp = 0;
}
}
#endif
/* Pack Scale factor */
ps16GenPtr = pstrEncParams->as16ScaleFactor;
s32Sb=s32NumOfChannels*s32NumOfSubBands;
/*Temp=*pu8PacketPtr;*/
for (s32Ch = s32Sb; s32Ch >0; s32Ch--)
{
Temp<<= 4;
Temp |= *ps16GenPtr++;
if(s32PresentBit == 4)
{
s32PresentBit = 8;
*(pu8PacketPtr++)=Temp;
Temp = 0;
}
else
{
s32PresentBit = 4;
}
}
/* Pack samples */
ps32SbPtr = pstrEncParams->s32SbBuffer;
/*Temp=*pu8PacketPtr;*/
s32NumOfBlocks= pstrEncParams->s16NumOfBlocks;
for (s32Blk = s32NumOfBlocks-1; s32Blk >=0; s32Blk--)
{
ps16GenPtr = pstrEncParams->as16Bits;
ps16ScfPtr = pstrEncParams->as16ScaleFactor;
for (s32Ch = s32Sb-1; s32Ch >= 0; s32Ch--)
{
s32LoopCount = *ps16GenPtr++;
if (s32LoopCount != 0)
{
#if (SBC_IS_64_MULT_IN_QUANTIZER==TRUE)
/* finding level from reconstruction part of decoder */
u32SfRaisedToPow2 = ((UINT32)1 << ((*ps16ScfPtr)+1));
u16Levels = (UINT16)(((UINT32)1 << s32LoopCount) - 1);
/* quantizer */
s32Temp1 = (*ps32SbPtr >> 2) + (u32SfRaisedToPow2 << 12);
s32Temp2 = u16Levels;
Mult64 (s32Temp1, s32Temp2, s32Low, s32Hi);
s32Low1 = s32Low >> ((*ps16ScfPtr)+2);
s32Low1 &= ((UINT32)1 << (32 - ((*ps16ScfPtr)+2))) - 1;
s32Hi1 = s32Hi << (32 - ((*ps16ScfPtr) +2));
u32QuantizedSbValue0 = (UINT16)((s32Low1 | s32Hi1) >> 12);
#else
/* finding level from reconstruction part of decoder */
u32SfRaisedToPow2 = ((UINT32)1 << *ps16ScfPtr);
u16Levels = (UINT16)(((UINT32)1 << s32LoopCount)-1);
/* quantizer */
s32Temp1 = (*ps32SbPtr >> 15) + u32SfRaisedToPow2;
Mult32(s32Temp1,u16Levels,s32Low);
s32Low>>= (*ps16ScfPtr+1);
u32QuantizedSbValue0 = (UINT16)s32Low;
#endif
/*store the number of bits required and the quantized s32Sb
sample to ease the coding*/
u32QuantizedSbValue = u32QuantizedSbValue0;
if(s32PresentBit >= s32LoopCount)
{
Temp <<= s32LoopCount;
Temp |= u32QuantizedSbValue;
s32PresentBit -= s32LoopCount;
}
else
{
while (s32PresentBit < s32LoopCount)
{
s32LoopCount -= s32PresentBit;
u32QuantizedSbValue >>= s32LoopCount;
/*remove the unwanted msbs*/
/*u32QuantizedSbValue <<= 16 - s32PresentBit;
u32QuantizedSbValue >>= 16 - s32PresentBit;*/
Temp <<= s32PresentBit;
Temp |= u32QuantizedSbValue ;
/*restore the original*/
u32QuantizedSbValue=u32QuantizedSbValue0;
*(pu8PacketPtr++)=Temp;
Temp = 0;
s32PresentBit = 8;
}
Temp <<= s32LoopCount;
/* remove the unwanted msbs */
/*u32QuantizedSbValue <<= 16 - s32LoopCount;
u32QuantizedSbValue >>= 16 - s32LoopCount;*/
Temp |= u32QuantizedSbValue;
s32PresentBit -= s32LoopCount;
}
}
ps16ScfPtr++;
ps32SbPtr++;
}
}
Temp <<= s32PresentBit;
*pu8PacketPtr=Temp;
pstrEncParams->u16PacketLength= (uint16_t)(pu8PacketPtr-pstrEncParams->pu8NextPacket)+1;
/*find CRC*/
pu8PacketPtr = pstrEncParams->pu8NextPacket+1; /*Initialize the ptr*/
u8CRC = 0x0F;
s32LoopCount = s32Sb >> 1;
/* BK4BTSTACK_CHANGE START */
if (reserved_ptr){
// overwrite fixed values for mSBC before CRC calculation
*reserved_ptr++ = 0;
*reserved_ptr++ = 0;
}
/* BK4BTSTACK_CHANGE END */
/*
The loops is run from the start of the packet till the scale factor
parameters. In case of JS, 'join' parameter is included in the packet
so that many more bytes are included in CRC calculation.
*/
Temp=*pu8PacketPtr;
for (s32Ch=1; s32Ch < (s32LoopCount+4); s32Ch++)
{
/* skip sync word and CRC bytes */
if (s32Ch != 3)
{
for (s32LoopCountJ=7; s32LoopCountJ>=0; s32LoopCountJ--)
{
u8XoredVal = ((u8CRC >> 7) & 0x01) ^((Temp >> s32LoopCountJ) & 0x01);
u8CRC <<= 1;
u8CRC ^= (u8XoredVal * 0x1D);
u8CRC &= 0xFF;
}
}
Temp=*(++pu8PacketPtr);
}
if (pstrEncParams->s16ChannelMode == SBC_JOINT_STEREO)
{
for (s32LoopCountJ = 7; s32LoopCountJ >= (8 - s32NumOfSubBands); s32LoopCountJ--)
{
u8XoredVal = ((u8CRC >> 7) & 0x01) ^((Temp >> s32LoopCountJ) & 0x01);
u8CRC <<= 1;
u8CRC ^= (u8XoredVal * 0x1D);
u8CRC &= 0xFF;
}
}
/* CRC calculation ends here */
/* store CRC in packet */
pu8PacketPtr = pstrEncParams->pu8NextPacket; /*Initialize the ptr*/
pu8PacketPtr += 3;
*pu8PacketPtr = u8CRC;
pstrEncParams->pu8NextPacket+=pstrEncParams->u16PacketLength; /* move the pointer to the end in case there is more than one frame to encode */
}