static void calc_prediction_coef_lp(sbr_info *sbr, qmf_t Xlow[MAX_NTSRHFG][64],
complex_t *alpha_0, complex_t *alpha_1, real_t *rxx)
{
uint8_t k;
real_t tmp, mul;
acorr_coef ac;
for (k = 1; k < sbr->f_master[0]; k++)
{
auto_correlation(sbr, &ac, Xlow, k, sbr->numTimeSlotsRate + 6);
if (ac.det == 0)
{
RE(alpha_0[k]) = 0;
RE(alpha_1[k]) = 0;
} else {
mul = DIV_R(REAL_CONST(1.0), ac.det);
tmp = MUL_R(RE(ac.r01), RE(ac.r22)) - MUL_R(RE(ac.r12), RE(ac.r02));
RE(alpha_0[k]) = -MUL_R(tmp, mul);
tmp = MUL_R(RE(ac.r01), RE(ac.r12)) - MUL_R(RE(ac.r02), RE(ac.r11));
RE(alpha_1[k]) = MUL_R(tmp, mul);
}
if ((RE(alpha_0[k]) >= REAL_CONST(4)) || (RE(alpha_1[k]) >= REAL_CONST(4)))
{
RE(alpha_0[k]) = REAL_CONST(0);
RE(alpha_1[k]) = REAL_CONST(0);
}
/* reflection coefficient */
if (RE(ac.r11) == 0)
{
rxx[k] = COEF_CONST(0.0);
} else {
rxx[k] = DIV_C(RE(ac.r01), RE(ac.r11));
rxx[k] = -rxx[k];
if (rxx[k] > COEF_CONST( 1.0)) rxx[k] = COEF_CONST(1.0);
if (rxx[k] < COEF_CONST(-1.0)) rxx[k] = COEF_CONST(-1.0);
}
}
}
static void QuantizeBand(const coef_t *xp, int32_t *ix,
int32_t offset, int32_t end)
{
register int32_t j;
static coef_t realconst1 = COEF_CONST(0.5);
for (j = offset; j < end; j++) {
ix[j] = (int32_t)COEF2INT(xp[j]+realconst1);
#ifdef DUMP_XI
printf("ix[%d] = %d\n",j,ix[j]);
#endif
}
}
/* FIXED POINT: bwArray = COEF */
static void calc_chirp_factors(sbr_info *sbr, uint8_t ch)
{
uint8_t i;
for (i = 0; i < sbr->N_Q; i++)
{
sbr->bwArray[ch][i] = mapNewBw(sbr->bs_invf_mode[ch][i], sbr->bs_invf_mode_prev[ch][i]);
if (sbr->bwArray[ch][i] < sbr->bwArray_prev[ch][i])
sbr->bwArray[ch][i] = MUL_F(sbr->bwArray[ch][i], FRAC_CONST(0.75)) + MUL_F(sbr->bwArray_prev[ch][i], FRAC_CONST(0.25));
else
sbr->bwArray[ch][i] = MUL_F(sbr->bwArray[ch][i], FRAC_CONST(0.90625)) + MUL_F(sbr->bwArray_prev[ch][i], FRAC_CONST(0.09375));
if (sbr->bwArray[ch][i] < COEF_CONST(0.015625))
sbr->bwArray[ch][i] = COEF_CONST(0.0);
if (sbr->bwArray[ch][i] > COEF_CONST(0.99609375))
sbr->bwArray[ch][i] = COEF_CONST(0.99609375);
sbr->bwArray_prev[ch][i] = sbr->bwArray[ch][i];
sbr->bs_invf_mode_prev[ch][i] = sbr->bs_invf_mode[ch][i];
}
}
/* Decoder transmitted coefficients for one TNS filter */
static void tns_decode_coef (uint8_t order, uint8_t coef_res_bits, uint8_t coef_compress,
uint8_t *coef, real_t *a)
{
uint8_t i, m;
real_t tmp2[TNS_MAX_ORDER+1], b[TNS_MAX_ORDER+1];
/* Conversion to signed integer */
for (i = 0; i < order; i++)
{
if (coef_compress == 0)
{
if (coef_res_bits == 3)
{
tmp2[i] = tns_coef_0_3[coef[i]];
} else {
tmp2[i] = tns_coef_0_4[coef[i]];
}
} else {
if (coef_res_bits == 3)
{
tmp2[i] = tns_coef_1_3[coef[i]];
} else {
tmp2[i] = tns_coef_1_4[coef[i]];
}
}
}
/* Conversion to LPC coefficients */
a[0] = COEF_CONST(1.0);
for (m = 1; m <= order; m++)
{
for (i = 1; i < m; i++) /* loop only while i<m */
b[i] = a[i] + MUL_C(tmp2[m-1], a[m-i]);
for (i = 1; i < m; i++) /* loop only while i<m */
a[i] = b[i];
a[m] = tmp2[m-1]; /* changed */
}
}
/* FIXED POINT: bwArray = COEF */
static real_t mapNewBw(uint8_t invf_mode, uint8_t invf_mode_prev)
{
switch (invf_mode)
{
case 1: /* LOW */
if (invf_mode_prev == 0) /* NONE */
return COEF_CONST(0.6);
else
return COEF_CONST(0.75);
case 2: /* MID */
return COEF_CONST(0.9);
case 3: /* HIGH */
return COEF_CONST(0.98);
default: /* NONE */
if (invf_mode_prev == 1) /* LOW */
return COEF_CONST(0.6);
else
return COEF_CONST(0.0);
}
}
- Within a group, a scalefactor band consists of the spectral data of all
grouped SHORT_WINDOWs for the associated scalefactor window band. To
clarify via example, the length of a group is in the range of one to eight
SHORT_WINDOWs.
- If there are eight groups each with length one (num_window_groups = 8,
window_group_length[0..7] = 1), the result is a sequence of eight spectra,
each in ascending spectral order.
- If there is only one group with length eight (num_window_groups = 1,
window_group_length[0] = 8), the result is that spectral data of all eight
SHORT_WINDOWs is interleaved by scalefactor window bands.
- Within a scalefactor window band, the coefficients are in ascending
spectral order.
*/
static const real_t pow2_table[] ICONST_ATTR =
{
COEF_CONST(1.0),
COEF_CONST(1.1892071150027210667174999705605), /* 2^0.25 */
COEF_CONST(1.4142135623730950488016887242097), /* 2^0.50 */
COEF_CONST(1.6817928305074290860622509524664) /* 2^0.75 */
};
static uint8_t quant_to_spec(NeAACDecHandle hDecoder,
ic_stream *ics, int16_t *quant_data,
real_t *spec_data, uint16_t frame_len)
{
const real_t *tab = iq_table;
(void)frame_len;
uint8_t g, sfb, win;
uint16_t width, bin, k, gindex, wa, wb;
uint8_t error = 0; /* Init error flag */
real_t scf;
drc->band_top[0] = 1024/4 - 1;
drc->dyn_rng_sgn[0] = 1;
drc->dyn_rng_ctl[0] = 0;
return drc;
}
void drc_end(drc_info *drc)
{
if (drc) faad_free(drc);
}
#ifdef FIXED_POINT
static real_t drc_pow2_table[] =
{
COEF_CONST(0.5146511183),
COEF_CONST(0.5297315472),
COEF_CONST(0.5452538663),
COEF_CONST(0.5612310242),
COEF_CONST(0.5776763484),
COEF_CONST(0.5946035575),
COEF_CONST(0.6120267717),
COEF_CONST(0.6299605249),
COEF_CONST(0.6484197773),
COEF_CONST(0.6674199271),
COEF_CONST(0.6869768237),
COEF_CONST(0.7071067812),
COEF_CONST(0.7278265914),
COEF_CONST(0.7491535384),
COEF_CONST(0.7711054127),
COEF_CONST(0.7937005260),
#include "common.h"
#include "structs.h"
#include "syntax.h"
#include "tns.h"
/*}}}*/
#ifdef _MSC_VER
#pragma warning(disable:4305)
#pragma warning(disable:4244)
#endif
/*{{{*/
static const real_t tns_coef_0_3[] =
{
COEF_CONST(0.0), COEF_CONST(0.4338837391), COEF_CONST(0.7818314825), COEF_CONST(0.9749279122),
COEF_CONST(-0.9848077530), COEF_CONST(-0.8660254038), COEF_CONST(-0.6427876097), COEF_CONST(-0.3420201433),
COEF_CONST(-0.4338837391), COEF_CONST(-0.7818314825), COEF_CONST(-0.9749279122), COEF_CONST(-0.9749279122),
COEF_CONST(-0.9848077530), COEF_CONST(-0.8660254038), COEF_CONST(-0.6427876097), COEF_CONST(-0.3420201433)
};
/*}}}*/
/*{{{*/
static const real_t tns_coef_0_4[] =
{
COEF_CONST(0.0), COEF_CONST(0.2079116908), COEF_CONST(0.4067366431), COEF_CONST(0.5877852523),
COEF_CONST(0.7431448255), COEF_CONST(0.8660254038), COEF_CONST(0.9510565163), COEF_CONST(0.9945218954),
COEF_CONST(-0.9957341763), COEF_CONST(-0.9618256432), COEF_CONST(-0.8951632914), COEF_CONST(-0.7980172273),
COEF_CONST(-0.6736956436), COEF_CONST(-0.5264321629), COEF_CONST(-0.3612416662), COEF_CONST(-0.1837495178)
};
/*}}}*/
/*{{{*/
#include "common.h"
#include "structs.h"
#ifdef LTP_DEC
#include <stdlib.h>
#include "syntax.h"
#include "lt_predict.h"
#include "filtbank.h"
#include "tns.h"
static real_t codebook[8] =
{
COEF_CONST(0.570829),
COEF_CONST(0.696616),
COEF_CONST(0.813004),
COEF_CONST(0.911304),
COEF_CONST(0.984900),
COEF_CONST(1.067894),
COEF_CONST(1.194601),
COEF_CONST(1.369533)
};
void lt_prediction(ic_stream *ics, ltp_info *ltp, real_t *spec,
real_t *lt_pred_stat, fb_info *fb, uint8_t win_shape,
uint8_t win_shape_prev, uint8_t sr_index,
uint8_t object_type, uint16_t frame_len)
{
uint8_t sfb;
/*
For ONLY_LONG_SEQUENCE windows (num_window_groups = 1,
window_group_length[0] = 1) the spectral data is in ascending spectral
order.
For the EIGHT_SHORT_SEQUENCE window, the spectral order depends on the
grouping in the following manner:
- Groups are ordered sequentially
- Within a group, a scalefactor band consists of the spectral data of all
grouped SHORT_WINDOWs for the associated scalefactor window band. To
clarify via example, the length of a group is in the range of one to eight
SHORT_WINDOWs.
- If there are eight groups each with length one (num_window_groups = 8,
window_group_length[0..7] = 1), the result is a sequence of eight spectra,
each in ascending spectral order.
- If there is only one group with length eight (num_window_groups = 1,
window_group_length[0] = 8), the result is that spectral data of all eight
SHORT_WINDOWs is interleaved by scalefactor window bands.
- Within a scalefactor window band, the coefficients are in ascending
spectral order.
*/
static uint8_t quant_to_spec(NeAACDecHandle hDecoder,
ic_stream *ics, int16_t *quant_data,
real_t *spec_data, uint16_t frame_len)
{
ALIGN static const real_t pow2_table[] =
{
COEF_CONST(1.0),
COEF_CONST(1.1892071150027210667174999705605), /* 2^0.25 */
COEF_CONST(1.4142135623730950488016887242097), /* 2^0.5 */
COEF_CONST(1.6817928305074290860622509524664) /* 2^0.75 */
};
const real_t *tab = iq_table;
uint8_t g, sfb, win;
uint16_t width, bin, k, gindex, wa, wb;
uint8_t error = 0; /* Init error flag */
#ifndef FIXED_POINT
real_t scf;
#endif
k = 0;
gindex = 0;
for (g = 0; g < ics->num_window_groups; g++)
{
uint16_t j = 0;
uint16_t gincrease = 0;
uint16_t win_inc = ics->swb_offset[ics->num_swb];
for (sfb = 0; sfb < ics->num_swb; sfb++)
{
int32_t exp, frac;
width = ics->swb_offset[sfb+1] - ics->swb_offset[sfb];
/* this could be scalefactor for IS or PNS, those can be negative or bigger then 255 */
/* just ignore them */
if (ics->scale_factors[g][sfb] < 0 || ics->scale_factors[g][sfb] > 255)
{
exp = 0;
frac = 0;
} else {
/* ics->scale_factors[g][sfb] must be between 0 and 255 */
exp = (ics->scale_factors[g][sfb] /* - 100 */) >> 2;
/* frac must always be > 0 */
frac = (ics->scale_factors[g][sfb] /* - 100 */) & 3;
}
#ifdef FIXED_POINT
exp -= 25;
/* IMDCT pre-scaling */
if (hDecoder->object_type == LD)
{
exp -= 6 /*9*/;
} else {
if (ics->window_sequence == EIGHT_SHORT_SEQUENCE)
exp -= 4 /*7*/;
else
exp -= 7 /*10*/;
}
#endif
wa = gindex + j;
#ifndef FIXED_POINT
scf = pow2sf_tab[exp/*+25*/] * pow2_table[frac];
#endif
for (win = 0; win < ics->window_group_length[g]; win++)
{
for (bin = 0; bin < width; bin += 4)
{
#ifndef FIXED_POINT
wb = wa + bin;
spec_data[wb+0] = iquant(quant_data[k+0], tab, &error) * scf;
spec_data[wb+1] = iquant(quant_data[k+1], tab, &error) * scf;
spec_data[wb+2] = iquant(quant_data[k+2], tab, &error) * scf;
spec_data[wb+3] = iquant(quant_data[k+3], tab, &error) * scf;
#else
real_t iq0 = iquant(quant_data[k+0], tab, &error);
real_t iq1 = iquant(quant_data[k+1], tab, &error);
real_t iq2 = iquant(quant_data[k+2], tab, &error);
real_t iq3 = iquant(quant_data[k+3], tab, &error);
wb = wa + bin;
if (exp < 0)
{
spec_data[wb+0] = iq0 >>= -exp;
spec_data[wb+1] = iq1 >>= -exp;
spec_data[wb+2] = iq2 >>= -exp;
spec_data[wb+3] = iq3 >>= -exp;
} else {
spec_data[wb+0] = iq0 <<= exp;
spec_data[wb+1] = iq1 <<= exp;
spec_data[wb+2] = iq2 <<= exp;
spec_data[wb+3] = iq3 <<= exp;
}
if (frac != 0)
{
spec_data[wb+0] = MUL_C(spec_data[wb+0],pow2_table[frac]);
spec_data[wb+1] = MUL_C(spec_data[wb+1],pow2_table[frac]);
spec_data[wb+2] = MUL_C(spec_data[wb+2],pow2_table[frac]);
spec_data[wb+3] = MUL_C(spec_data[wb+3],pow2_table[frac]);
}
//#define SCFS_PRINT
#ifdef SCFS_PRINT
printf("%d\n", spec_data[gindex+(win*win_inc)+j+bin+0]);
printf("%d\n", spec_data[gindex+(win*win_inc)+j+bin+1]);
printf("%d\n", spec_data[gindex+(win*win_inc)+j+bin+2]);
printf("%d\n", spec_data[gindex+(win*win_inc)+j+bin+3]);
//printf("0x%.8X\n", spec_data[gindex+(win*win_inc)+j+bin+0]);
//printf("0x%.8X\n", spec_data[gindex+(win*win_inc)+j+bin+1]);
//printf("0x%.8X\n", spec_data[gindex+(win*win_inc)+j+bin+2]);
//printf("0x%.8X\n", spec_data[gindex+(win*win_inc)+j+bin+3]);
#endif
#endif
gincrease += 4;
k += 4;
}
wa += win_inc;
}
j += width;
}
** ** Commercial non-GPL licensing of this software is possible. ** For more info contact Ahead Software through [email protected]. ** ** $Id: is.c,v 1.1 2005/11/27 01:00:36 tonymillion Exp $ **/ #include "common.h" #include "structs.h" #include "syntax.h" #include "is.h" #ifdef FIXED_POINT static real_t pow05_table[] = { COEF_CONST(1.68179283050743), /* 0.5^(-3/4) */ COEF_CONST(1.41421356237310), /* 0.5^(-2/4) */ COEF_CONST(1.18920711500272), /* 0.5^(-1/4) */ COEF_CONST(1.0), /* 0.5^( 0/4) */ COEF_CONST(0.84089641525371), /* 0.5^(+1/4) */ COEF_CONST(0.70710678118655), /* 0.5^(+2/4) */ COEF_CONST(0.59460355750136) /* 0.5^(+3/4) */ }; #endif void is_decode(ic_stream *ics, ic_stream *icsr, real_t *l_spec, real_t *r_spec, uint16_t frame_len) { uint8_t g, sfb, b; uint16_t i; #ifndef FIXED_POINT
4096.0, 8192.0, 16384.0,
32768.0, 65536.0, 131072.0,
262144.0, 524288.0, 1048576.0,
2097152.0, 4194304.0, 8388608.0,
16777216.0, 33554432.0, 67108864.0,
134217728.0, 268435456.0, 536870912.0,
1073741824.0, 2147483648.0, 4294967296.0,
8589934592.0, 17179869184.0, 34359738368.0,
68719476736.0, 137438953472.0, 274877906944.0
};
#endif
ALIGN static real_t pow2_table[] =
{
#if 0
COEF_CONST(0.59460355750136053335874998528024), /* 2^-0.75 */
COEF_CONST(0.70710678118654752440084436210485), /* 2^-0.5 */
COEF_CONST(0.84089641525371454303112547623321), /* 2^-0.25 */
#endif
COEF_CONST(1.0),
COEF_CONST(1.1892071150027210667174999705605), /* 2^0.25 */
COEF_CONST(1.4142135623730950488016887242097), /* 2^0.5 */
COEF_CONST(1.6817928305074290860622509524664) /* 2^0.75 */
};
void apply_scalefactors(faacDecHandle hDecoder, ic_stream *ics,
real_t *x_invquant, uint16_t frame_len)
{
uint8_t g, sfb;
uint16_t top;
int32_t exp, frac;
#include "cfft.h"
#include "mdct.h"
/* const_tab[]:
0: sqrt(2 / N)
1: cos(2 * PI / N)
2: sin(2 * PI / N)
3: cos(2 * PI * (1/8) / N)
4: sin(2 * PI * (1/8) / N)
*/
#ifdef FIXED_POINT
real_t const_tab[][5] =
{
{ /* 2048 */
COEF_CONST(1),
FRAC_CONST(0.99999529380957619),
FRAC_CONST(0.0030679567629659761),
FRAC_CONST(0.99999992646571789),
FRAC_CONST(0.00038349518757139556)
}, { /* 1920 */
COEF_CONST(/* sqrt(1024/960) */ 1.0327955589886444),
FRAC_CONST(0.99999464540169647),
FRAC_CONST(0.0032724865065266251),
FRAC_CONST(0.99999991633432805),
FRAC_CONST(0.00040906153202803459)
}, { /* 1024 */
COEF_CONST(1),
FRAC_CONST(0.99998117528260111),
FRAC_CONST(0.0061358846491544753),
FRAC_CONST(0.99999970586288223),
void faad_imdct(mdct_info *mdct, real_t *X_in, real_t *X_out)
{
uint16_t k;
complex_t x;
#ifdef ALLOW_SMALL_FRAMELENGTH
#ifdef FIXED_POINT
real_t scale, b_scale = 0;
#endif
#endif
ALIGN complex_t Z1[512];
complex_t *sincos = mdct->sincos;
uint16_t N = mdct->N;
uint16_t N2 = N >> 1;
uint16_t N4 = N >> 2;
uint16_t N8 = N >> 3;
#ifdef PROFILE
int64_t count1, count2 = faad_get_ts();
#endif
#ifdef ALLOW_SMALL_FRAMELENGTH
#ifdef FIXED_POINT
/* detect non-power of 2 */
if (N & (N-1))
{
/* adjust scale for non-power of 2 MDCT */
/* 2048/1920 */
b_scale = 1;
scale = COEF_CONST(1.0666666666666667);
}
#endif
#endif
/* pre-IFFT complex multiplication */
for (k = 0; k < N4; k++)
{
ComplexMult(&IM(Z1[k]), &RE(Z1[k]),
X_in[2*k], X_in[N2 - 1 - 2*k], RE(sincos[k]), IM(sincos[k]));
}
#ifdef PROFILE
count1 = faad_get_ts();
#endif
/* complex IFFT, any non-scaling FFT can be used here */
cfftb(mdct->cfft, Z1);
#ifdef PROFILE
count1 = faad_get_ts() - count1;
#endif
/* post-IFFT complex multiplication */
for (k = 0; k < N4; k++)
{
RE(x) = RE(Z1[k]);
IM(x) = IM(Z1[k]);
ComplexMult(&IM(Z1[k]), &RE(Z1[k]),
IM(x), RE(x), RE(sincos[k]), IM(sincos[k]));
#ifdef ALLOW_SMALL_FRAMELENGTH
#ifdef FIXED_POINT
/* non-power of 2 MDCT scaling */
if (b_scale)
{
RE(Z1[k]) = MUL_C(RE(Z1[k]), scale);
IM(Z1[k]) = MUL_C(IM(Z1[k]), scale);
}
#endif
#endif
}
/* reordering */
for (k = 0; k < N8; k+=2)
{
X_out[ 2*k] = IM(Z1[N8 + k]);
X_out[ 2 + 2*k] = IM(Z1[N8 + 1 + k]);
X_out[ 1 + 2*k] = -RE(Z1[N8 - 1 - k]);
X_out[ 3 + 2*k] = -RE(Z1[N8 - 2 - k]);
X_out[N4 + 2*k] = RE(Z1[ k]);
X_out[N4 + + 2 + 2*k] = RE(Z1[ 1 + k]);
X_out[N4 + 1 + 2*k] = -IM(Z1[N4 - 1 - k]);
X_out[N4 + 3 + 2*k] = -IM(Z1[N4 - 2 - k]);
X_out[N2 + 2*k] = RE(Z1[N8 + k]);
X_out[N2 + + 2 + 2*k] = RE(Z1[N8 + 1 + k]);
X_out[N2 + 1 + 2*k] = -IM(Z1[N8 - 1 - k]);
X_out[N2 + 3 + 2*k] = -IM(Z1[N8 - 2 - k]);
X_out[N2 + N4 + 2*k] = -IM(Z1[ k]);
X_out[N2 + N4 + 2 + 2*k] = -IM(Z1[ 1 + k]);
X_out[N2 + N4 + 1 + 2*k] = RE(Z1[N4 - 1 - k]);
X_out[N2 + N4 + 3 + 2*k] = RE(Z1[N4 - 2 - k]);
}
#ifdef PROFILE
count2 = faad_get_ts() - count2;
mdct->fft_cycles += count1;
mdct->cycles += (count2 - count1);
#endif
}
static void calc_aliasing_degree(sbr_info *sbr, real_t *rxx, real_t *deg)
{
uint8_t k;
rxx[0] = COEF_CONST(0.0);
deg[1] = COEF_CONST(0.0);
for (k = 2; k < sbr->k0; k++)
{
deg[k] = COEF_CONST(0.0);
if ((k % 2 == 0) && (rxx[k] < COEF_CONST(0.0)))
{
if (rxx[k-1] < COEF_CONST(0.0))
{
deg[k] = COEF_CONST(1.0);
if (rxx[k-2] > COEF_CONST(0.0))
{
deg[k-1] = COEF_CONST(1.0) - MUL_C(rxx[k-1], rxx[k-1]);
}
} else if (rxx[k-2] > COEF_CONST(0.0)) {
deg[k] = COEF_CONST(1.0) - MUL_C(rxx[k-1], rxx[k-1]);
}
}
if ((k % 2 == 1) && (rxx[k] > COEF_CONST(0.0)))
{
if (rxx[k-1] > COEF_CONST(0.0))
{
deg[k] = COEF_CONST(1.0);
if (rxx[k-2] < COEF_CONST(0.0))
{
deg[k-1] = COEF_CONST(1.0) - MUL_C(rxx[k-1], rxx[k-1]);
}
} else if (rxx[k-2] < COEF_CONST(0.0)) {
deg[k] = COEF_CONST(1.0) - MUL_C(rxx[k-1], rxx[k-1]);
}
}
}
}
void faad_mdct(mdct_info *mdct, real_t *X_in, real_t *X_out)
{
uint16_t k;
complex_t x;
ALIGN complex_t Z1[512];
complex_t *sincos = mdct->sincos;
uint16_t N = mdct->N;
uint16_t N2 = N >> 1;
uint16_t N4 = N >> 2;
uint16_t N8 = N >> 3;
#ifndef FIXED_POINT
real_t scale = REAL_CONST(N);
#else
real_t scale = REAL_CONST(4.0/N);
#endif
#ifdef ALLOW_SMALL_FRAMELENGTH
#ifdef FIXED_POINT
/* detect non-power of 2 */
if (N & (N-1))
{
/* adjust scale for non-power of 2 MDCT */
/* *= sqrt(2048/1920) */
scale = MUL_C(scale, COEF_CONST(1.0327955589886444));
}
#endif
#endif
/* pre-FFT complex multiplication */
for (k = 0; k < N8; k++)
{
uint16_t n = k << 1;
RE(x) = X_in[N - N4 - 1 - n] + X_in[N - N4 + n];
IM(x) = X_in[ N4 + n] - X_in[ N4 - 1 - n];
ComplexMult(&RE(Z1[k]), &IM(Z1[k]),
RE(x), IM(x), RE(sincos[k]), IM(sincos[k]));
RE(Z1[k]) = MUL_R(RE(Z1[k]), scale);
IM(Z1[k]) = MUL_R(IM(Z1[k]), scale);
RE(x) = X_in[N2 - 1 - n] - X_in[ n];
IM(x) = X_in[N2 + n] + X_in[N - 1 - n];
ComplexMult(&RE(Z1[k + N8]), &IM(Z1[k + N8]),
RE(x), IM(x), RE(sincos[k + N8]), IM(sincos[k + N8]));
RE(Z1[k + N8]) = MUL_R(RE(Z1[k + N8]), scale);
IM(Z1[k + N8]) = MUL_R(IM(Z1[k + N8]), scale);
}
/* complex FFT, any non-scaling FFT can be used here */
cfftf(mdct->cfft, Z1);
/* post-FFT complex multiplication */
for (k = 0; k < N4; k++)
{
uint16_t n = k << 1;
ComplexMult(&RE(x), &IM(x),
RE(Z1[k]), IM(Z1[k]), RE(sincos[k]), IM(sincos[k]));
X_out[ n] = -RE(x);
X_out[N2 - 1 - n] = IM(x);
X_out[N2 + n] = -IM(x);
X_out[N - 1 - n] = RE(x);
}
}
static void hf_assembly(sbr_info *sbr, sbr_hfadj_info *adj,
qmf_t Xsbr[MAX_NTSRHFG][64], uint8_t ch)
{
static real_t h_smooth[] = {
COEF_CONST(0.03183050093751), COEF_CONST(0.11516383427084),
COEF_CONST(0.21816949906249), COEF_CONST(0.30150283239582),
COEF_CONST(0.33333333333333)
};
static int8_t phi_re[] = { 1, 0, -1, 0 };
static int8_t phi_im[] = { 0, 1, 0, -1 };
uint8_t m, l, i, n;
uint16_t fIndexNoise = 0;
uint8_t fIndexSine = 0;
uint8_t assembly_reset = 0;
real_t *temp;
real_t G_filt, Q_filt;
uint8_t h_SL;
if (sbr->Reset == 1)
{
assembly_reset = 1;
fIndexNoise = 0;
} else {
fIndexNoise = sbr->index_noise_prev[ch];
}
fIndexSine = sbr->psi_is_prev[ch];
for (l = 0; l < sbr->L_E[ch]; l++)
{
uint8_t no_noise = (l == sbr->l_A[ch] || l == sbr->prevEnvIsShort[ch]) ? 1 : 0;
#ifdef SBR_LOW_POWER
h_SL = 0;
#else
h_SL = (sbr->bs_smoothing_mode == 1) ? 0 : 4;
h_SL = (no_noise ? 0 : h_SL);
#endif
if (assembly_reset)
{
for (n = 0; n < 4; n++)
{
memcpy(sbr->G_temp_prev[ch][n], adj->G_lim_boost[l], sbr->M*sizeof(real_t));
memcpy(sbr->Q_temp_prev[ch][n], adj->Q_M_lim_boost[l], sbr->M*sizeof(real_t));
}
assembly_reset = 0;
}
for (i = sbr->t_E[ch][l]; i < sbr->t_E[ch][l+1]; i++)
{
#ifdef SBR_LOW_POWER
uint8_t i_min1, i_plus1;
uint8_t sinusoids = 0;
#endif
memcpy(sbr->G_temp_prev[ch][4], adj->G_lim_boost[l], sbr->M*sizeof(real_t));
memcpy(sbr->Q_temp_prev[ch][4], adj->Q_M_lim_boost[l], sbr->M*sizeof(real_t));
for (m = 0; m < sbr->M; m++)
{
uint8_t j;
qmf_t psi;
G_filt = 0;
Q_filt = 0;
j = 0;
if (h_SL != 0)
{
for (n = 0; n <= 4; n++)
{
G_filt += MUL_C(sbr->G_temp_prev[ch][n][m], h_smooth[j]);
Q_filt += MUL_C(sbr->Q_temp_prev[ch][n][m], h_smooth[j]);
j++;
}
} else {
G_filt = sbr->G_temp_prev[ch][4][m];
Q_filt = sbr->Q_temp_prev[ch][4][m];
}
Q_filt = (adj->S_M_boost[l][m] != 0 || no_noise) ? 0 : Q_filt;
/* add noise to the output */
fIndexNoise = (fIndexNoise + 1) & 511;
/* the smoothed gain values are applied to Xsbr */
/* V is defined, not calculated */
QMF_RE(Xsbr[i + sbr->tHFAdj][m+sbr->kx]) = MUL_R(G_filt, QMF_RE(Xsbr[i + sbr->tHFAdj][m+sbr->kx]))
+ MUL_F(Q_filt, RE(V[fIndexNoise]));
if (sbr->bs_extension_id == 3 && sbr->bs_extension_data == 42)
QMF_RE(Xsbr[i + sbr->tHFAdj][m+sbr->kx]) = 16428320;
#ifndef SBR_LOW_POWER
QMF_IM(Xsbr[i + sbr->tHFAdj][m+sbr->kx]) = MUL_R(G_filt, QMF_IM(Xsbr[i + sbr->tHFAdj][m+sbr->kx]))
+ MUL_F(Q_filt, IM(V[fIndexNoise]));
#endif
//if (adj->S_index_mapped[m][l])
{
int8_t rev = (((m + sbr->kx) & 1) ? -1 : 1);
QMF_RE(psi) = MUL_R(adj->S_M_boost[l][m], phi_re[fIndexSine]);
QMF_RE(Xsbr[i + sbr->tHFAdj][m+sbr->kx]) += QMF_RE(psi);
#ifndef SBR_LOW_POWER
QMF_IM(psi) = rev * MUL_R(adj->S_M_boost[l][m], phi_im[fIndexSine]);
QMF_IM(Xsbr[i + sbr->tHFAdj][m+sbr->kx]) += QMF_IM(psi);
#else
i_min1 = (fIndexSine - 1) & 3;
i_plus1 = (fIndexSine + 1) & 3;
if (m == 0)
{
QMF_RE(Xsbr[i + sbr->tHFAdj][m+sbr->kx - 1]) -=
(-1*rev * MUL_C(MUL_R(adj->S_M_boost[l][0], phi_re[i_plus1]), COEF_CONST(0.00815)));
if(m < sbr->M - 1)
{
QMF_RE(Xsbr[i + sbr->tHFAdj][m+sbr->kx]) -=
(rev * MUL_C(MUL_R(adj->S_M_boost[l][1], phi_re[i_plus1]), COEF_CONST(0.00815)));
}
}
if ((m > 0) && (m < sbr->M - 1) && (sinusoids < 16))
{
QMF_RE(Xsbr[i + sbr->tHFAdj][m+sbr->kx]) -=
(rev * MUL_C(MUL_R(adj->S_M_boost[l][m - 1], phi_re[i_min1]), COEF_CONST(0.00815)));
QMF_RE(Xsbr[i + sbr->tHFAdj][m+sbr->kx]) -=
(rev * MUL_C(MUL_R(adj->S_M_boost[l][m + 1], phi_re[i_plus1]), COEF_CONST(0.00815)));
}
if ((m == sbr->M - 1) && (sinusoids < 16))
{
if (m > 0)
{
QMF_RE(Xsbr[i + sbr->tHFAdj][m+sbr->kx]) -=
(rev * MUL_C(MUL_R(adj->S_M_boost[l][m - 1], phi_re[i_min1]), COEF_CONST(0.00815)));
}
if (m + sbr->kx < 64)
{
QMF_RE(Xsbr[i + sbr->tHFAdj][m+sbr->kx + 1]) -=
(-1*rev * MUL_C(MUL_R(adj->S_M_boost[l][m], phi_re[i_min1]), COEF_CONST(0.00815)));
}
}
if (adj->S_M_boost[l][m] != 0)
sinusoids++;
#endif
}
}
fIndexSine = (fIndexSine + 1) & 3;
temp = sbr->G_temp_prev[ch][0];
for (n = 0; n < 4; n++)
sbr->G_temp_prev[ch][n] = sbr->G_temp_prev[ch][n+1];
sbr->G_temp_prev[ch][4] = temp;
temp = sbr->Q_temp_prev[ch][0];
for (n = 0; n < 4; n++)
sbr->Q_temp_prev[ch][n] = sbr->Q_temp_prev[ch][n+1];
sbr->Q_temp_prev[ch][4] = temp;
}
}
sbr->index_noise_prev[ch] = fIndexNoise;
sbr->psi_is_prev[ch] = fIndexSine;
}
