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moyuhai
2026-06-11 13:00:46 +08:00
commit e8074162f3
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component/SBC/encoder/Makefile.inc
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# sbc encoder
SBC_ENCODER += \
sbc_analysis.c \
sbc_dct.c \
sbc_dct_coeffs.c \
sbc_enc_bit_alloc_mono.c \
sbc_enc_bit_alloc_ste.c \
sbc_enc_coeffs.c \
sbc_encoder.c \
sbc_packing.c \
component/SBC/encoder/include/sbc_dct.h
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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.
*
******************************************************************************/
/******************************************************************************
*
* Definitions for the fast DCT.
*
******************************************************************************/
#ifndef SBC_DCT_H
#define SBC_DCT_H
#if (SBC_ARM_ASM_OPT==TRUE)
#define SBC_MULT_32_16_SIMPLIFIED(s16In2, s32In1, s32OutLow) \
{ \
__asm \
{ \
MUL s32OutLow,(SINT32)s16In2, (s32In1>>15) \
} \
}
#else
#if (SBC_DSP_OPT==TRUE)
#define SBC_MULT_32_16_SIMPLIFIED(s16In2, s32In1 , s32OutLow) s32OutLow = SBC_Multiply_32_16_Simplified((SINT32)s16In2,s32In1);
#else
#if (SBC_IPAQ_OPT==TRUE)
/*#define SBC_MULT_32_16_SIMPLIFIED(s16In2, s32In1 , s32OutLow) s32OutLow=(SINT32)((SINT32)(s16In2)*(SINT32)(s32In1>>15)); */
#define SBC_MULT_32_16_SIMPLIFIED(s16In2, s32In1 , s32OutLow) s32OutLow=(SINT32)(((SINT64)s16In2*(SINT64)s32In1)>>15);
#if (SBC_IS_64_MULT_IN_IDCT == TRUE)
#define SBC_MULT_32_32(s32In2, s32In1, s32OutLow) \
{ \
s64Temp = ((SINT64) s32In2) * ((SINT64) s32In1)>>31; \
s32OutLow = (SINT32) s64Temp; \
}
#endif
#else
#define SBC_MULT_32_16_SIMPLIFIED(s16In2, s32In1 , s32OutLow) \
{ \
s32In1Temp = s32In1; \
s32In2Temp = (SINT32)s16In2; \
\
/* Multiply one +ve and the other -ve number */ \
if (s32In1Temp < 0) \
{ \
s32In1Temp ^= 0xFFFFFFFF; \
s32In1Temp++; \
s32OutLow = (s32In2Temp * (s32In1Temp >> 16)); \
s32OutLow += (( s32In2Temp * (s32In1Temp & 0xFFFF)) >> 16); \
s32OutLow ^= 0xFFFFFFFF; \
s32OutLow++; \
} \
else \
{ \
s32OutLow = (s32In2Temp * (s32In1Temp >> 16)); \
s32OutLow += (( s32In2Temp * (s32In1Temp & 0xFFFF)) >> 16); \
} \
s32OutLow <<= 1; \
}
#if (SBC_IS_64_MULT_IN_IDCT == TRUE)
#define SBC_MULT_64(s32In1, s32In2, s32OutLow, s32OutHi) \
{\
s32OutLow=(SINT32)(((SINT64)s32In1*(SINT64)s32In2)& 0x00000000FFFFFFFF);\
s32OutHi=(SINT32)(((SINT64)s32In1*(SINT64)s32In2)>>32);\
}
#define SBC_MULT_32_32(s32In2, s32In1, s32OutLow) \
{ \
s32HiTemp = 0; \
SBC_MULT_64(s32In2,s32In1 , s32OutLow, s32HiTemp); \
s32OutLow = (((s32OutLow>>15)&0x1FFFF) | (s32HiTemp << 17)); \
}
#endif
#endif
#endif
#endif
#endif
component/SBC/encoder/include/sbc_enc_func_declare.h
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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.
*
******************************************************************************/
/******************************************************************************
*
* Function declarations.
*
******************************************************************************/
#ifndef SBC_FUNCDECLARE_H
#define SBC_FUNCDECLARE_H
/*#include "sbc_encoder.h"*/
/* Global data */
#if (SBC_IS_64_MULT_IN_WINDOW_ACCU == FALSE)
extern const SINT16 gas32CoeffFor4SBs[];
extern const SINT16 gas32CoeffFor8SBs[];
#else
extern const SINT32 gas32CoeffFor4SBs[];
extern const SINT32 gas32CoeffFor8SBs[];
#endif
/* Global functions*/
extern void sbc_enc_bit_alloc_mono(SBC_ENC_PARAMS *CodecParams);
extern void sbc_enc_bit_alloc_ste(SBC_ENC_PARAMS *CodecParams);
extern void SbcAnalysisInit (SBC_ENC_PARAMS *CodecParams);
extern void SbcAnalysisFilter4(SBC_ENC_PARAMS *strEncParams);
extern void SbcAnalysisFilter8(SBC_ENC_PARAMS *strEncParams);
extern void SBC_FastIDCT8 (SINT32 *pInVect, SINT32 *pOutVect);
extern void SBC_FastIDCT4 (SINT32 *x0, SINT32 *pOutVect);
extern void EncPacking(SBC_ENC_PARAMS *strEncParams);
extern void EncQuantizer(SBC_ENC_PARAMS *);
#if (SBC_DSP_OPT==TRUE)
SINT32 SBC_Multiply_32_16_Simplified(SINT32 s32In2Temp,SINT32 s32In1Temp);
#endif
#endif
component/SBC/encoder/include/sbc_encoder.h
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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 constants and structures used by Encoder.
*
******************************************************************************/
#ifndef SBC_ENCODER_H
#define SBC_ENCODER_H
#define ENCODER_VERSION "0025"
#ifdef BUILDCFG
#include "bt_target.h"
#endif
/*DEFINES*/
#ifndef FALSE
#define FALSE 0
#endif
#ifndef TRUE
#define TRUE (!FALSE)
#endif
/* BK4BTSTACK_CHANGE START */
#define SBC_NO_PCM_CPY_OPTION TRUE
/* BK4BTSTACK_CHANGE END */
#define SBC_MAX_NUM_OF_SUBBANDS 8
#define SBC_MAX_NUM_OF_CHANNELS 2
#define SBC_MAX_NUM_OF_BLOCKS 16
#define SBC_LOUDNESS 0
#define SBC_SNR 1
#define SUB_BANDS_8 8
#define SUB_BANDS_4 4
#define SBC_sf16000 0
#define SBC_sf32000 1
#define SBC_sf44100 2
#define SBC_sf48000 3
#define SBC_MONO 0
#define SBC_DUAL 1
#define SBC_STEREO 2
#define SBC_JOINT_STEREO 3
#define SBC_BLOCK_0 4
#define SBC_BLOCK_1 8
#define SBC_BLOCK_2 12
#define SBC_BLOCK_3 16
#define SBC_NULL 0
#ifndef SBC_MAX_NUM_FRAME
#define SBC_MAX_NUM_FRAME 1
#endif
#ifndef SBC_DSP_OPT
#define SBC_DSP_OPT FALSE
#endif
/* Set SBC_USE_ARM_PRAGMA to TRUE to use "#pragma arm section zidata" */
#ifndef SBC_USE_ARM_PRAGMA
#define SBC_USE_ARM_PRAGMA FALSE
#endif
/* Set SBC_ARM_ASM_OPT to TRUE in case the target is an ARM */
/* this will replace all the 32 and 64 bit mult by in line assembly code */
#ifndef SBC_ARM_ASM_OPT
#define SBC_ARM_ASM_OPT FALSE
#endif
/* green hill compiler option -> Used to distinguish the syntax for inline assembly code*/
#ifndef SBC_GHS_COMPILER
#define SBC_GHS_COMPILER FALSE
#endif
/* ARM compiler option -> Used to distinguish the syntax for inline assembly code */
#ifndef SBC_ARM_COMPILER
#define SBC_ARM_COMPILER TRUE
#endif
/* Set SBC_IPAQ_OPT to TRUE in case the target is an ARM */
/* 32 and 64 bit mult will be performed using SINT64 ( usualy __int64 ) cast that usualy give optimal performance if supported */
#ifndef SBC_IPAQ_OPT
#define SBC_IPAQ_OPT TRUE
#endif
/* Debug only: set SBC_IS_64_MULT_IN_WINDOW_ACCU to TRUE to use 64 bit multiplication in the windowing */
/* -> not recomended, more MIPS for the same restitution. */
#ifndef SBC_IS_64_MULT_IN_WINDOW_ACCU
#define SBC_IS_64_MULT_IN_WINDOW_ACCU FALSE
#endif /*SBC_IS_64_MULT_IN_WINDOW_ACCU */
/* Set SBC_IS_64_MULT_IN_IDCT to TRUE to use 64 bits multiplication in the DCT of Matrixing */
/* -> more MIPS required for a better audio quality. comparasion with the SIG utilities shows a division by 10 of the RMS */
/* CAUTION: It only apply in the if SBC_FAST_DCT is set to TRUE */
#ifndef SBC_IS_64_MULT_IN_IDCT
#define SBC_IS_64_MULT_IN_IDCT FALSE
#endif /*SBC_IS_64_MULT_IN_IDCT */
/* set SBC_IS_64_MULT_IN_QUANTIZER to TRUE to use 64 bits multiplication in the quantizer */
/* setting this flag to FALSE add whistling noise at 5.5 and 11 KHz usualy not perceptible by human's hears. */
#ifndef SBC_IS_64_MULT_IN_QUANTIZER
#define SBC_IS_64_MULT_IN_QUANTIZER TRUE
#endif /*SBC_IS_64_MULT_IN_IDCT */
/* Debug only: set this flag to FALSE to disable fast DCT algorithm */
#ifndef SBC_FAST_DCT
#define SBC_FAST_DCT TRUE
#endif /*SBC_FAST_DCT */
/* In case we do not use joint stereo mode the flag save some RAM and ROM in case it is set to FALSE */
#ifndef SBC_JOINT_STE_INCLUDED
#define SBC_JOINT_STE_INCLUDED TRUE
#endif
/* TRUE -> application should provide PCM buffer, FALSE PCM buffer reside in SBC_ENC_PARAMS */
#ifndef SBC_NO_PCM_CPY_OPTION
#define SBC_NO_PCM_CPY_OPTION FALSE
#endif
#define MINIMUM_ENC_VX_BUFFER_SIZE (8*10*2)
#ifndef ENC_VX_BUFFER_SIZE
#define ENC_VX_BUFFER_SIZE (MINIMUM_ENC_VX_BUFFER_SIZE + 64)
/*#define ENC_VX_BUFFER_SIZE MINIMUM_ENC_VX_BUFFER_SIZE + 1024*/
#endif
#ifndef SBC_FOR_EMBEDDED_LINUX
#define SBC_FOR_EMBEDDED_LINUX FALSE
#endif
/*constants used for index calculation*/
#define SBC_BLK (SBC_MAX_NUM_OF_CHANNELS * SBC_MAX_NUM_OF_SUBBANDS)
#include "sbc_types.h"
typedef struct SBC_ENC_PARAMS_TAG
{
SINT16 s16SamplingFreq; /* 16k, 32k, 44.1k or 48k*/
SINT16 s16ChannelMode; /* mono, dual, streo or joint streo*/
SINT16 s16NumOfSubBands; /* 4 or 8 */
SINT16 s16NumOfChannels;
SINT16 s16NumOfBlocks; /* SBC: 4, 8, 12 or 16; mSBC: 15*/
SINT16 s16AllocationMethod; /* loudness or SNR*/
SINT16 s16BitPool; /* 16*numOfSb for mono & dual;
32*numOfSb for stereo & joint stereo */
/* BK4BTSTACK_CHANGE START */
// UINT16 u16BitRate;
/* BK4BTSTACK_CHANGE END */
UINT8 u8NumPacketToEncode; /* number of sbc frame to encode. Default is 1 */
#if (SBC_JOINT_STE_INCLUDED == TRUE)
SINT16 as16Join[SBC_MAX_NUM_OF_SUBBANDS]; /*1 if JS, 0 otherwise*/
#endif
SINT16 s16MaxBitNeed;
SINT16 as16ScaleFactor[SBC_MAX_NUM_OF_CHANNELS*SBC_MAX_NUM_OF_SUBBANDS];
SINT16 *ps16NextPcmBuffer;
#if (SBC_NO_PCM_CPY_OPTION == TRUE)
SINT16 *ps16PcmBuffer;
#else
SINT16 as16PcmBuffer[SBC_MAX_NUM_FRAME*SBC_MAX_NUM_OF_BLOCKS * SBC_MAX_NUM_OF_CHANNELS * SBC_MAX_NUM_OF_SUBBANDS];
#endif
SINT16 s16ScartchMemForBitAlloc[16];
SINT32 s32SbBuffer[SBC_MAX_NUM_OF_CHANNELS * SBC_MAX_NUM_OF_SUBBANDS * SBC_MAX_NUM_OF_BLOCKS];
SINT16 as16Bits[SBC_MAX_NUM_OF_CHANNELS*SBC_MAX_NUM_OF_SUBBANDS];
UINT8 *pu8Packet;
UINT8 *pu8NextPacket;
UINT16 FrameHeader;
UINT16 u16PacketLength;
/* BK4BTSTACK_CHANGE START */
UINT8 mSBCEnabled;
// from sbc_analysis
SINT32 s32DCTY[16];// = {0};
SINT32 s32X[ENC_VX_BUFFER_SIZE/2];
SINT16 *s16X;//=(SINT16*) s32X; /* s16X must be 32 bits aligned cf SHIFTUP_X8_2*/
SINT16 ShiftCounter;
// from sbc_encoder
SINT16 EncMaxShiftCounter;
/* BK4BTSTACK_CHANGE END */
}SBC_ENC_PARAMS;
#ifdef __cplusplus
extern "C"
{
#endif
SBC_API extern void SBC_Encoder(SBC_ENC_PARAMS *strEncParams);
SBC_API extern void SBC_Encoder_Init(SBC_ENC_PARAMS *strEncParams);
#ifdef __cplusplus
}
#endif
#endif
component/SBC/encoder/include/sbc_types.h
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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.
*
******************************************************************************/
/******************************************************************************
*
* Data type declarations.
*
******************************************************************************/
#ifndef SBC_TYPES_H
#define SBC_TYPES_H
#ifdef BUILDCFG
#include "bt_target.h"
#endif
/* BK4BTSTACK_CHANGE START */
#if 0
// #include "data_types.h"
typedef short SINT16;
typedef long SINT32;
#if (SBC_IPAQ_OPT == TRUE)
#if (SBC_FOR_EMBEDDED_LINUX == TRUE)
typedef long long SINT64;
#else
typedef __int64 SINT64;
#endif
#elif (SBC_IS_64_MULT_IN_WINDOW_ACCU == TRUE) || (SBC_IS_64_MULT_IN_IDCT == TRUE)
#if (SBC_FOR_EMBEDDED_LINUX == TRUE)
typedef long long SINT64;
#else
typedef __int64 SINT64;
#endif
#endif
#else
#include <stdint.h>
typedef int8_t SINT8;
typedef int16_t SINT16;
typedef int32_t SINT32;
typedef int64_t SINT64;
typedef uint8_t UINT8;
typedef uint16_t UINT16;
typedef uint32_t UINT32;
typedef uint64_t UINT64;
#endif
/* BK4BTSTACK_CHANGE STOP */
#define SBC_API
#define abs32(x) ( (x >= 0) ? x : (-x) )
#endif
component/SBC/encoder/msbc_encoder_port.c
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//#include "msbc_encoder_port.h"
#include "sbc_encoder.h"
#include "xc60xx.h"
#define mSBC_SYNCWORD 0xad
#define SBC_MAX_CHANNELS 2
struct msbc_encoder_state {
SBC_ENC_PARAMS *context;
int num_data_bytes;
uint8_t sbc_packet[512];
};
__attribute__((section("ram_user"))) static struct msbc_encoder_state encoder_state = {0};
static uint8_t msbc_encode_inited = 0;
int msbc_encoder_init(void)
{
static SBC_ENC_PARAMS msbc_context = {
.s16NumOfBlocks = 15,
.s16NumOfSubBands = 8,
.s16AllocationMethod = SBC_LOUDNESS,
.s16BitPool = 26,
.s16ChannelMode = SBC_MONO,
.s16NumOfChannels = 1,
.mSBCEnabled = 1,
.s16SamplingFreq = SBC_sf16000,
};
// int status = 0;
encoder_state.context = &msbc_context;
encoder_state.context->pu8Packet = encoder_state.sbc_packet;
SBC_Encoder_Init(encoder_state.context);
msbc_encode_inited = 1;
return 0;
}
int msbc_encoder_num_audio_frames(void)
{
SBC_ENC_PARAMS * context = encoder_state.context;
return context->s16NumOfSubBands * context->s16NumOfBlocks;
}
uint8_t * msbc_encoder_sbc_buffer(void)
{
SBC_ENC_PARAMS * context = encoder_state.context;
return context->pu8Packet;
}
uint16_t msbc_encoder_sbc_buffer_length(void)
{
SBC_ENC_PARAMS * context = encoder_state.context;
return context->u16PacketLength;
}
void __attribute__((section("ram_sbc_code"))) msbc_encoder_process_data(int16_t * input_buffer)
{
if (!msbc_encode_inited) {
printf("SBC encoder: sbc state is NULL, call btstack_sbc_encoder_init to initialize it\r\n");
}
SBC_ENC_PARAMS * context = encoder_state.context;
context->ps16PcmBuffer = input_buffer;
if (context->mSBCEnabled) {
context->pu8Packet[0] = 0xad;
}
SBC_Encoder(context);
}
component/SBC/encoder/msbc_encoder_port.h
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#ifndef __MSBC_ENCODER_PORT_H_
#define __MSBC_ENCODER_PORT_H_
int msbc_encoder_num_audio_frames(void);
uint8_t * msbc_encoder_sbc_buffer(void);
uint16_t msbc_encoder_sbc_buffer_length(void);
int msbc_encoder_init(void);
void msbc_encoder_process_data(int16_t * input_buffer);
#endif
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
+200
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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
+200
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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
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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*/
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
View File
@@ -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
View File
@@ -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
View File
@@ -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 */
}