void idct_8(Int32 vec[])
{
Int32 tmp0;
Int32 tmp1;
Int32 tmp2;
Int32 tmp3;
Int32 tmp4;
Int32 tmp5;
Int32 tmp6;
Int32 tmp7;
Int32 tmp8;
tmp5 = fxp_mul32_by_16(vec[4] << 1, Qfmt15(0.70710678118655F));
tmp1 = vec[0] + tmp5;
tmp5 = vec[0] - tmp5;
tmp3 = fxp_mul32_by_16(vec[2] << 1, Qfmt15(0.54119610014620F)); /* (1/(2*cos(2*phi)));*/
tmp7 = fxp_mul32_Q29(vec[6], Qfmt(1.30656296487638F)); /* (1/(2*cos(6*phi)));*/
tmp0 = fxp_mul32_by_16((tmp3 - tmp7) << 1, Qfmt15(0.70710678118655F)); /* (1/(2*cos(2*phi))); */
tmp7 = (tmp3 + tmp7) + tmp0;
vec[0] = tmp1 + tmp7;
tmp2 = fxp_mul32_by_16(vec[1] << 1, Qfmt15(0.50979557910416F)); /* (1/(2*cos( phi)));*/
vec[1] = tmp5 + tmp0;
vec[2] = tmp5 - tmp0;
tmp4 = fxp_mul32_by_16(vec[3] << 1, Qfmt15(0.60134488693505F)); /* (1/(2*cos(3*phi)));*/
vec[3] = tmp1 - tmp7;
tmp6 = fxp_mul32_by_16(vec[5] << 1, Qfmt15(0.89997622313642F)); /* (1/(2*cos(5*phi)));*/
tmp8 = fxp_mul32_Q29(vec[7], Qfmt(2.56291544774151F)); /* (1/(2*cos(7*phi)));*/
tmp7 = tmp2 + tmp8;
tmp5 = fxp_mul32_by_16((tmp2 - tmp8) << 1, Qfmt15(0.54119610014620F));
tmp8 = tmp4 + tmp6;
tmp6 = fxp_mul32_Q29((tmp4 - tmp6), Qfmt(1.30656296487638F));
tmp0 = tmp7 + tmp8;
tmp2 = fxp_mul32_by_16((tmp7 - tmp8) << 1, Qfmt15(0.70710678118655F));
tmp3 = fxp_mul32_by_16((tmp5 - tmp6) << 1, Qfmt15(0.70710678118655F));
tmp1 = (tmp5 + tmp6) + tmp3;
tmp5 = tmp0 + tmp1;
tmp6 = tmp1 + tmp2;
tmp7 = tmp2 + tmp3;
vec[7] = vec[0] - tmp5;
vec[0] += tmp5;
vec[6] = vec[1] - tmp6;
vec[1] += tmp6;
vec[5] = vec[2] - tmp7;
vec[2] += tmp7;
vec[4] = vec[3] - tmp3;
vec[3] += tmp3;
}
/*----------------------------------------------------------------------------
; DEFINES
; Include all pre-processor statements here. Include conditional
; compile variables also.
----------------------------------------------------------------------------*/
#define R_SHIFT 28
#define Qfmt(x) (Int32)(x*((Int32)1<<R_SHIFT) + (x>=0?0.5F:-0.5F))
#define Qfmt31(x) (Int32)(x*(0x7FFFFFFF) + (x>=0?0.5F:-0.5F))
const Int32 CosTable_8i[8] =
{
Qfmt31(0.50241928618816F), Qfmt31(0.52249861493969F),
Qfmt31(0.56694403481636F), Qfmt31(0.64682178335999F),
Qfmt(0.78815462345125F), Qfmt(1.06067768599035F),
Qfmt(1.72244709823833F), Qfmt(5.10114861868916F)
};
/*----------------------------------------------------------------------------
; LOCAL FUNCTION DEFINITIONS
; Function Prototype declaration
----------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------
; LOCAL STORE/BUFFER/POINTER DEFINITIONS
; Variable declaration - defined here and used outside this module
----------------------------------------------------------------------------*/
; Function Prototype declaration
----------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------
; LOCAL STORE/BUFFER/POINTER DEFINITIONS
; Variable declaration - defined here and used outside this module
----------------------------------------------------------------------------*/
const int32 CosTable_dct32[16] =
{
Qfmt_31(0.50060299823520F) , Qfmt_31(0.50547095989754F) ,
Qfmt_31(0.51544730992262F) , Qfmt_31(0.53104259108978F) ,
Qfmt_31(0.55310389603444F) , Qfmt_31(0.58293496820613F) ,
Qfmt_31(0.62250412303566F) , Qfmt_31(0.67480834145501F) ,
Qfmt_31(0.74453627100230F) , Qfmt_31(0.83934964541553F) ,
Qfmt(0.97256823786196F) , Qfmt(1.16943993343288F) ,
Qfmt(1.48416461631417F) , Qfmt(2.05778100995341F) ,
Qfmt(3.40760841846872F) , Qfmt(10.19000812354803F)
};
/*----------------------------------------------------------------------------
; EXTERNAL FUNCTION REFERENCES
; Declare functions defined elsewhere and referenced in this module
----------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------
; EXTERNAL GLOBAL STORE/BUFFER/POINTER REFERENCES
; Declare variables used in this module but defined elsewhere
----------------------------------------------------------------------------*/
; Declare functions defined elsewhere and referenced in this module
----------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------
; EXTERNAL GLOBAL STORE/BUFFER/POINTER REFERENCES
; Declare variables used in this module but defined elsewhere
----------------------------------------------------------------------------*/
#include "pv_audio_type_defs.h"
#include "fxp_mul32.h"
#define R_SHIFT 29
#define Qfmt(x) (Int32)(x*((Int32)1<<R_SHIFT) + (x>=0?0.5F:-0.5F))
const Int32 InvFiltFactors[5] = {Qfmt(0.00f), /* OFF_LEVEL */
Qfmt(0.60f), /* TRANSITION_LEVEL */
Qfmt(0.75f), /* LOW_LEVEL */
Qfmt(0.90f), /* MID_LEVEL */
Qfmt(0.98f)
}; /* HIGH_LEVEL */
/*----------------------------------------------------------------------------
; FUNCTION CODE
----------------------------------------------------------------------------*/
void sbr_inv_filt_levelemphasis(INVF_MODE *invFiltMode,
INVF_MODE *prevInvFiltMode,
Int32 nNfb,
Int32 BwVector[MAX_NUM_PATCHES],
Int32 BwVectorOld[MAX_NUM_PATCHES])
; Include all pre-processor statements here. Include conditional
; compile variables also.
----------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------
; LOCAL FUNCTION DEFINITIONS
; Function Prototype declaration
----------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------
; LOCAL STORE/BUFFER/POINTER DEFINITIONS
; Variable declaration - defined here and used outside this module
----------------------------------------------------------------------------*/
const int32 cosTerms_dct18[9] =
{
Qfmt(0.50190991877167f), Qfmt(0.51763809020504f), Qfmt(0.55168895948125f),
Qfmt(0.61038729438073f), Qfmt(0.70710678118655f), Qfmt(0.87172339781055f),
Qfmt(1.18310079157625f), Qfmt(1.93185165257814f), Qfmt(5.73685662283493f)
};
const int32 cosTerms_1_ov_cos_phi[18] =
{
Qfmt1(0.50047634258166f), Qfmt1(0.50431448029008f), Qfmt1(0.51213975715725f),
Qfmt1(0.52426456257041f), Qfmt1(0.54119610014620f), Qfmt1(0.56369097343317f),
Qfmt1(0.59284452371708f), Qfmt1(0.63023620700513f), Qfmt1(0.67817085245463f),
Qfmt2(0.74009361646113f), Qfmt2(0.82133981585229f), Qfmt2(0.93057949835179f),
Qfmt2(1.08284028510010f), Qfmt2(1.30656296487638f), Qfmt2(1.66275476171152f),
Qfmt2(2.31011315767265f), Qfmt2(3.83064878777019f), Qfmt2(11.46279281302667f)
----------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------
; DEFINES
; Include all pre-processor statements here. Include conditional
; compile variables also.
----------------------------------------------------------------------------*/
#define R_SHIFT 28
#define Qfmt(x) (Int32)(x*((Int32)1<<R_SHIFT) + (x>=0?0.5F:-0.5F))
const Int32 CosTable_8[8] =
{
Qfmt(0.50241928618816F), Qfmt(0.52249861493969F),
Qfmt(0.56694403481636F), Qfmt(0.64682178335999F),
Qfmt(0.78815462345125F), Qfmt(1.06067768599035F),
Qfmt(1.72244709823833F), Qfmt(5.10114861868916F)
};
/*----------------------------------------------------------------------------
; LOCAL FUNCTION DEFINITIONS
; Function Prototype declaration
----------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------
; LOCAL STORE/BUFFER/POINTER DEFINITIONS
; Variable declaration - defined here and used outside this module
----------------------------------------------------------------------------*/
void sbr_envelope_unmapping(SBR_FRAME_DATA * hFrameData1,
SBR_FRAME_DATA * hFrameData2)
{
Int32 i;
Int32 tempLeft;
Int32 tempRight;
Int32 tmp;
Int32 *iEnvelopeLeft_man = hFrameData1->iEnvelope_man;
Int32 *iEnvelopeLeft_exp = hFrameData1->iEnvelope_exp;
Int32 *noiseFloorLeft_man = hFrameData1->sbrNoiseFloorLevel_man;
Int32 *noiseFloorLeft_exp = hFrameData1->sbrNoiseFloorLevel_exp;
Int32 *iEnvelopeRight_man = hFrameData2->iEnvelope_man;
Int32 *iEnvelopeRight_exp = hFrameData2->iEnvelope_exp;
Int32 *noiseFloorRight_man = hFrameData2->sbrNoiseFloorLevel_man;
Int32 *noiseFloorRight_exp = hFrameData2->sbrNoiseFloorLevel_exp;
if (hFrameData2->ampRes)
{
for (i = 0; i < hFrameData1->nScaleFactors; i++)
{
tempRight = iEnvelopeRight_man[i];
tempLeft = iEnvelopeLeft_man[i];
/* iEnvelope[i] always positive 6 bits max */
iEnvelopeLeft_exp[i] = tempLeft + 7;
iEnvelopeRight_exp[i] = tempRight - 12;
iEnvelopeRight_man[i] = Qfmt(1.000F);
/*
* iEnvelopeRight[i] = tempLeft / (1 + tempRight);
* iEnvelopeLeft[i] = tempRight * iEnvelopeRight[i];
*
*
* iEnvelopeRight[i] = k*2^n/(1+2^m) = k*2^(n-m)/(1 + 2^-m);
* where k = 1 or sqrt(2)
*/
if (iEnvelopeRight_exp[i] >= 0)
{
if (iEnvelopeRight_exp[i] < 11)
{
iEnvelopeRight_man[i] = one_over_one_plus_two_to_n[ iEnvelopeRight_exp[i]];
}
else /* 1/(1+2^-m) == 1 - 2^-m ; for m >= 10 */
{
iEnvelopeRight_man[i] -= (Qfmt(1.000F) >> iEnvelopeRight_exp[i]);
}
iEnvelopeRight_exp[i] = iEnvelopeLeft_exp[i] - iEnvelopeRight_exp[i];
}
else
{
if (iEnvelopeRight_exp[i] > -11)
{
iEnvelopeRight_man[i] -= one_over_one_plus_two_to_n[ -iEnvelopeRight_exp[i]];
iEnvelopeRight_exp[i] = iEnvelopeLeft_exp[i] - iEnvelopeRight_exp[i];
}
else /* 1/(1+2^m) == 2^-m ; for m >= 10 */
{
iEnvelopeRight_exp[i] = iEnvelopeLeft_exp[i];
iEnvelopeLeft_exp[i] = 0;
}
}
iEnvelopeLeft_man[i] = iEnvelopeRight_man[i];
}
}
----------------------------------------------------------------------------*/
/*----------------------------------------------------------------------------
; LOCAL STORE/BUFFER/POINTER DEFINITIONS
; Variable declaration - defined here and used outside this module
----------------------------------------------------------------------------*/
#define R_SHIFT 30
#define Qfmt(x) (Int32)(x*((Int32)1<<R_SHIFT) + (x>=0?0.5F:-0.5F))
/*
* 1./(1+2.^-[0:10])
*/
const Int32 one_over_one_plus_two_to_n[11] =
{
Qfmt(0.50000000000000F), Qfmt(0.66666666666667F), Qfmt(0.80000000000000F),
Qfmt(0.88888888888889F), Qfmt(0.94117647058824F), Qfmt(0.96969696969697F),
Qfmt(0.98461538461538F), Qfmt(0.99224806201550F), Qfmt(0.99610894941634F),
Qfmt(0.99805068226121F), Qfmt(0.99902439024390F)
};
/*
* 1./(1+2.^[0.5:-1:-10.5])
*/
const Int32 one_over_one_plus_sq_2_by_two_to_n[12] =
{
Qfmt(0.41421356237310F), Qfmt(0.58578643762690F), Qfmt(0.73879612503626F),
Qfmt(0.84977889517767F), Qfmt(0.91878969685839F), Qfmt(0.95767628767521F),
Qfmt(0.97838063800882F), Qfmt(0.98907219289563F), Qfmt(0.99450607818892F),
Qfmt(0.99724547251514F), Qfmt(0.99862083678608F), Qfmt(0.99930994254211F)
};
