/*

* Copyright (c) 2013

* MIPS Technologies, Inc., California.

*

* Redistribution and use in source and binary forms, with or without

* modification, are permitted provided that the following conditions

* are met:

* 1. Redistributions of source code must retain the above copyright

* notice, this list of conditions and the following disclaimer.

* 2. Redistributions in binary form must reproduce the above copyright

* notice, this list of conditions and the following disclaimer in the

* documentation and/or other materials provided with the distribution.

* 3. Neither the name of the MIPS Technologies, Inc., nor the names of its

* contributors may be used to endorse or promote products derived from

* this software without specific prior written permission.

*

* THIS SOFTWARE IS PROVIDED BY THE MIPS TECHNOLOGIES, INC. ``AS IS'' AND

* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE

* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE

* ARE DISCLAIMED. IN NO EVENT SHALL THE MIPS TECHNOLOGIES, INC. BE LIABLE

* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS

* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)

* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT

* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY

* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF

* SUCH DAMAGE.

*

* AAC Spectral Band Replication decoding functions (fixed-point)

* Copyright (c) 2008-2009 Robert Swain ( rob opendot cl )

* Copyright (c) 2009-2010 Alex Converse <[email protected]>

*

* This file is part of FFmpeg.

*

* FFmpeg is free software; you can redistribute it and/or

* modify it under the terms of the GNU Lesser General Public

* License as published by the Free Software Foundation; either

* version 2.1 of the License, or (at your option) any later version.

*

* FFmpeg is distributed in the hope that it will be useful,

* but WITHOUT ANY WARRANTY; without even the implied warranty of

* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU

* Lesser General Public License for more details.

*

* You should have received a copy of the GNU Lesser General Public

* License along with FFmpeg; if not, write to the Free Software

* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

*/

/**

* @file

* AAC Spectral Band Replication decoding functions (fixed-point)

* Note: Rounding-to-nearest used unless otherwise stated

* @author Robert Swain ( rob opendot cl )

* @author Stanislav Ocovaj ( stanislav.ocovaj imgtec com )

*/

#define USE_FIXED 1

#include "aac.h"

#include "sbr.h"

#include "aacsbr.h"

#include "aacsbrdata.h"

#include "aacsbr_fixed_tablegen.h"

#include "fft.h"

#include "aacps.h"

#include "sbrdsp.h"

#include "libavutil/internal.h"

#include "libavutil/libm.h"

#include "libavutil/avassert.h"

#include <stdint.h>

#include <float.h>

#include <math.h>

static VLC vlc_sbr[10];

static void aacsbr_func_ptr_init(AACSBRContext *c);

static const int CONST_LN2 = Q31(0.6931471806/256); // ln(2)/256

static const int CONST_RECIP_LN2 = Q31(0.7213475204); // 0.5/ln(2)

static const int CONST_076923 = Q31(0.76923076923076923077f);

static const int fixed_log_table[10] =

{

Q31(1.0/2), Q31(1.0/3), Q31(1.0/4), Q31(1.0/5), Q31(1.0/6),

Q31(1.0/7), Q31(1.0/8), Q31(1.0/9), Q31(1.0/10), Q31(1.0/11)

};

static int fixed_log(int x)

{

int i, ret, xpow, tmp;

ret = x;

xpow = x;

for (i=0; i<10; i+=2){

xpow = (int)(((int64_t)xpow * x + 0x40000000) >> 31);

tmp = (int)(((int64_t)xpow * fixed_log_table[i] + 0x40000000) >> 31);

ret -= tmp;

xpow = (int)(((int64_t)xpow * x + 0x40000000) >> 31);

tmp = (int)(((int64_t)xpow * fixed_log_table[i+1] + 0x40000000) >> 31);

ret += tmp;

}

return ret;

}

static const int fixed_exp_table[7] =

{

Q31(1.0/2), Q31(1.0/6), Q31(1.0/24), Q31(1.0/120),

Q31(1.0/720), Q31(1.0/5040), Q31(1.0/40320)

};

static int fixed_exp(int x)

{

int i, ret, xpow, tmp;

ret = 0x800000 + x;

xpow = x;

for (i=0; i<7; i++){

xpow = (int)(((int64_t)xpow * x + 0x400000) >> 23);

tmp = (int)(((int64_t)xpow * fixed_exp_table[i] + 0x40000000) >> 31);

ret += tmp;

}

return ret;

}

static void make_bands(int16_t* bands, int start, int stop, int num_bands)

{

int k, previous, present;

int base, prod, nz = 0;

base = (stop << 23) / start;

while (base < 0x40000000){

base <<= 1;

nz++;

}

base = fixed_log(base - 0x80000000);

base = (((base + 0x80) >> 8) + (8-nz)*CONST_LN2) / num_bands;

base = fixed_exp(base);

previous = start;

prod = start << 23;

for (k = 0; k < num_bands-1; k++) {

prod = (int)(((int64_t)prod * base + 0x400000) >> 23);

present = (prod + 0x400000) >> 23;

bands[k] = present - previous;

previous = present;

}

bands[num_bands-1] = stop - previous;

}

/// Dequantization and stereo decoding (14496-3 sp04 p203)

static void sbr_dequant(SpectralBandReplication *sbr, int id_aac)

{

int k, e;

int ch;

if (id_aac == TYPE_CPE && sbr->bs_coupling) {

int alpha = sbr->data[0].bs_amp_res ? 2 : 1;

int pan_offset = sbr->data[0].bs_amp_res ? 12 : 24;

for (e = 1; e <= sbr->data[0].bs_num_env; e++) {

for (k = 0; k < sbr->n[sbr->data[0].bs_freq_res[e]]; k++) {

SoftFloat temp1, temp2, fac;

temp1.exp = sbr->data[0].env_facs_q[e][k] * alpha + 14;

if (temp1.exp & 1)

temp1.mant = 759250125;

else

temp1.mant = 0x20000000;

temp1.exp = (temp1.exp >> 1) + 1;

if (temp1.exp > 66) { // temp1 > 1E20

av_log(NULL, AV_LOG_ERROR, "envelope scalefactor overflow in dequant\n");

temp1 = FLOAT_1;

}

temp2.exp = (pan_offset - sbr->data[1].env_facs_q[e][k]) * alpha;

if (temp2.exp & 1)

temp2.mant = 759250125;

else

temp2.mant = 0x20000000;

temp2.exp = (temp2.exp >> 1) + 1;

fac = av_div_sf(temp1, av_add_sf(FLOAT_1, temp2));

sbr->data[0].env_facs[e][k] = fac;

sbr->data[1].env_facs[e][k] = av_mul_sf(fac, temp2);

}

}

for (e = 1; e <= sbr->data[0].bs_num_noise; e++) {

for (k = 0; k < sbr->n_q; k++) {

SoftFloat temp1, temp2, fac;

temp1.exp = NOISE_FLOOR_OFFSET - \

sbr->data[0].noise_facs_q[e][k] + 2;

temp1.mant = 0x20000000;

av_assert0(temp1.exp <= 66);

temp2.exp = 12 - sbr->data[1].noise_facs_q[e][k] + 1;

temp2.mant = 0x20000000;

fac = av_div_sf(temp1, av_add_sf(FLOAT_1, temp2));

sbr->data[0].noise_facs[e][k] = fac;

sbr->data[1].noise_facs[e][k] = av_mul_sf(fac, temp2);

}

}

} else { // SCE or one non-coupled CPE

for (ch = 0; ch < (id_aac == TYPE_CPE) + 1; ch++) {

int alpha = sbr->data[ch].bs_amp_res ? 2 : 1;

for (e = 1; e <= sbr->data[ch].bs_num_env; e++)

for (k = 0; k < sbr->n[sbr->data[ch].bs_freq_res[e]]; k++){

SoftFloat temp1;

temp1.exp = alpha * sbr->data[ch].env_facs_q[e][k] + 12;

if (temp1.exp & 1)

temp1.mant = 759250125;

else

temp1.mant = 0x20000000;

temp1.exp = (temp1.exp >> 1) + 1;

if (temp1.exp > 66) { // temp1 > 1E20

av_log(NULL, AV_LOG_ERROR, "envelope scalefactor overflow in dequant\n");

temp1 = FLOAT_1;

}

sbr->data[ch].env_facs[e][k] = temp1;

}

for (e = 1; e <= sbr->data[ch].bs_num_noise; e++)

for (k = 0; k < sbr->n_q; k++){

sbr->data[ch].noise_facs[e][k].exp = NOISE_FLOOR_OFFSET - \

sbr->data[ch].noise_facs_q[e][k] + 1;

sbr->data[ch].noise_facs[e][k].mant = 0x20000000;

}

}

}

}

/** High Frequency Generation (14496-3 sp04 p214+) and Inverse Filtering

* (14496-3 sp04 p214)

* Warning: This routine does not seem numerically stable.

*/

static void sbr_hf_inverse_filter(SBRDSPContext *dsp,

int (*alpha0)[2], int (*alpha1)[2],

const int X_low[32][40][2], int k0)

{

int k;

int shift, round;

for (k = 0; k < k0; k++) {

SoftFloat phi[3][2][2];

SoftFloat a00, a01, a10, a11;

SoftFloat dk;

dsp->autocorrelate(X_low[k], phi);

dk = av_sub_sf(av_mul_sf(phi[2][1][0], phi[1][0][0]),

av_mul_sf(av_add_sf(av_mul_sf(phi[1][1][0], phi[1][1][0]),

av_mul_sf(phi[1][1][1], phi[1][1][1])), FLOAT_0999999));

if (!dk.mant) {

a10 = FLOAT_0;

a11 = FLOAT_0;

} else {

SoftFloat temp_real, temp_im;

temp_real = av_sub_sf(av_sub_sf(av_mul_sf(phi[0][0][0], phi[1][1][0]),

av_mul_sf(phi[0][0][1], phi[1][1][1])),

av_mul_sf(phi[0][1][0], phi[1][0][0]));

temp_im = av_sub_sf(av_add_sf(av_mul_sf(phi[0][0][0], phi[1][1][1]),

av_mul_sf(phi[0][0][1], phi[1][1][0])),

av_mul_sf(phi[0][1][1], phi[1][0][0]));

a10 = av_div_sf(temp_real, dk);

a11 = av_div_sf(temp_im, dk);

}

if (!phi[1][0][0].mant) {

a00 = FLOAT_0;

a01 = FLOAT_0;

} else {

SoftFloat temp_real, temp_im;

temp_real = av_add_sf(phi[0][0][0],

av_add_sf(av_mul_sf(a10, phi[1][1][0]),

av_mul_sf(a11, phi[1][1][1])));

temp_im = av_add_sf(phi[0][0][1],

av_sub_sf(av_mul_sf(a11, phi[1][1][0]),

av_mul_sf(a10, phi[1][1][1])));

temp_real.mant = -temp_real.mant;

temp_im.mant = -temp_im.mant;

a00 = av_div_sf(temp_real, phi[1][0][0]);

a01 = av_div_sf(temp_im, phi[1][0][0]);

}

shift = a00.exp;

if (shift >= 3)

alpha0[k][0] = 0x7fffffff;

else if (shift <= -30)

alpha0[k][0] = 0;

else {

shift = 1-shift;

if (shift <= 0)

alpha0[k][0] = a00.mant * (1<<-shift);

else {

round = 1 << (shift-1);

alpha0[k][0] = (a00.mant + round) >> shift;

}

}

shift = a01.exp;

if (shift >= 3)

alpha0[k][1] = 0x7fffffff;

else if (shift <= -30)

alpha0[k][1] = 0;

else {

shift = 1-shift;

if (shift <= 0)

alpha0[k][1] = a01.mant * (1<<-shift);

else {

round = 1 << (shift-1);

alpha0[k][1] = (a01.mant + round) >> shift;

}

}

shift = a10.exp;

if (shift >= 3)

alpha1[k][0] = 0x7fffffff;

else if (shift <= -30)

alpha1[k][0] = 0;

else {

shift = 1-shift;

if (shift <= 0)

alpha1[k][0] = a10.mant * (1<<-shift);

else {

round = 1 << (shift-1);

alpha1[k][0] = (a10.mant + round) >> shift;

}

}

shift = a11.exp;

if (shift >= 3)

alpha1[k][1] = 0x7fffffff;

else if (shift <= -30)

alpha1[k][1] = 0;

else {

shift = 1-shift;

if (shift <= 0)

alpha1[k][1] = a11.mant * (1<<-shift);

else {

round = 1 << (shift-1);

alpha1[k][1] = (a11.mant + round) >> shift;

}

}

shift = (int)(((int64_t)(alpha1[k][0]>>1) * (alpha1[k][0]>>1) + \

(int64_t)(alpha1[k][1]>>1) * (alpha1[k][1]>>1) + \

0x40000000) >> 31);

if (shift >= 0x20000000){

alpha1[k][0] = 0;

alpha1[k][1] = 0;

alpha0[k][0] = 0;

alpha0[k][1] = 0;

}

shift = (int)(((int64_t)(alpha0[k][0]>>1) * (alpha0[k][0]>>1) + \

(int64_t)(alpha0[k][1]>>1) * (alpha0[k][1]>>1) + \

0x40000000) >> 31);

if (shift >= 0x20000000){

alpha1[k][0] = 0;

alpha1[k][1] = 0;

alpha0[k][0] = 0;

alpha0[k][1] = 0;

}

}

}

/// Chirp Factors (14496-3 sp04 p214)

static void sbr_chirp(SpectralBandReplication *sbr, SBRData *ch_data)

{

int i;

int new_bw;

static const int bw_tab[] = { 0, 1610612736, 1932735283, 2104533975 };

int64_t accu;

for (i = 0; i < sbr->n_q; i++) {

if (ch_data->bs_invf_mode[0][i] + ch_data->bs_invf_mode[1][i] == 1)

new_bw = 1288490189;

else

new_bw = bw_tab[ch_data->bs_invf_mode[0][i]];

if (new_bw < ch_data->bw_array[i]){

accu = (int64_t)new_bw * 1610612736;

accu += (int64_t)ch_data->bw_array[i] * 0x20000000;

new_bw = (int)((accu + 0x40000000) >> 31);

} else {

accu = (int64_t)new_bw * 1946157056;

accu += (int64_t)ch_data->bw_array[i] * 201326592;

new_bw = (int)((accu + 0x40000000) >> 31);

}

ch_data->bw_array[i] = new_bw < 0x2000000 ? 0 : new_bw;

}

}

/**

* Calculation of levels of additional HF signal components (14496-3 sp04 p219)

* and Calculation of gain (14496-3 sp04 p219)

*/

static void sbr_gain_calc(AACContext *ac, SpectralBandReplication *sbr,

SBRData *ch_data, const int e_a[2])

{

int e, k, m;

// max gain limits : -3dB, 0dB, 3dB, inf dB (limiter off)

static const SoftFloat limgain[4] = { { 760155524, 0 }, { 0x20000000, 1 },

{ 758351638, 1 }, { 625000000, 34 } };

for (e = 0; e < ch_data->bs_num_env; e++) {

int delta = !((e == e_a[1]) || (e == e_a[0]));

for (k = 0; k < sbr->n_lim; k++) {

SoftFloat gain_boost, gain_max;

SoftFloat sum[2];

sum[0] = sum[1] = FLOAT_0;

for (m = sbr->f_tablelim[k] - sbr->kx[1]; m < sbr->f_tablelim[k + 1] - sbr->kx[1]; m++) {

const SoftFloat temp = av_div_sf(sbr->e_origmapped[e][m],

av_add_sf(FLOAT_1, sbr->q_mapped[e][m]));

sbr->q_m[e][m] = av_sqrt_sf(av_mul_sf(temp, sbr->q_mapped[e][m]));

sbr->s_m[e][m] = av_sqrt_sf(av_mul_sf(temp, av_int2sf(ch_data->s_indexmapped[e + 1][m], 0)));

if (!sbr->s_mapped[e][m]) {

if (delta) {

sbr->gain[e][m] = av_sqrt_sf(av_div_sf(sbr->e_origmapped[e][m],

av_mul_sf(av_add_sf(FLOAT_1, sbr->e_curr[e][m]),

av_add_sf(FLOAT_1, sbr->q_mapped[e][m]))));

} else {

sbr->gain[e][m] = av_sqrt_sf(av_div_sf(sbr->e_origmapped[e][m],

av_add_sf(FLOAT_1, sbr->e_curr[e][m])));

}

} else {

sbr->gain[e][m] = av_sqrt_sf(

av_div_sf(

av_mul_sf(sbr->e_origmapped[e][m], sbr->q_mapped[e][m]),

av_mul_sf(

av_add_sf(FLOAT_1, sbr->e_curr[e][m]),

av_add_sf(FLOAT_1, sbr->q_mapped[e][m]))));

}

sbr->gain[e][m] = av_add_sf(sbr->gain[e][m], FLOAT_MIN);

}

for (m = sbr->f_tablelim[k] - sbr->kx[1]; m < sbr->f_tablelim[k + 1] - sbr->kx[1]; m++) {

sum[0] = av_add_sf(sum[0], sbr->e_origmapped[e][m]);

sum[1] = av_add_sf(sum[1], sbr->e_curr[e][m]);

}

gain_max = av_mul_sf(limgain[sbr->bs_limiter_gains],

av_sqrt_sf(

av_div_sf(

av_add_sf(FLOAT_EPSILON, sum[0]),

av_add_sf(FLOAT_EPSILON, sum[1]))));

if (av_gt_sf(gain_max, FLOAT_100000))

gain_max = FLOAT_100000;

for (m = sbr->f_tablelim[k] - sbr->kx[1]; m < sbr->f_tablelim[k + 1] - sbr->kx[1]; m++) {

SoftFloat q_m_max = av_div_sf(

av_mul_sf(sbr->q_m[e][m], gain_max),

sbr->gain[e][m]);

if (av_gt_sf(sbr->q_m[e][m], q_m_max))

sbr->q_m[e][m] = q_m_max;

if (av_gt_sf(sbr->gain[e][m], gain_max))

sbr->gain[e][m] = gain_max;

}

sum[0] = sum[1] = FLOAT_0;

for (m = sbr->f_tablelim[k] - sbr->kx[1]; m < sbr->f_tablelim[k + 1] - sbr->kx[1]; m++) {

sum[0] = av_add_sf(sum[0], sbr->e_origmapped[e][m]);

sum[1] = av_add_sf(sum[1],

av_mul_sf(

av_mul_sf(sbr->e_curr[e][m],

sbr->gain[e][m]),

sbr->gain[e][m]));

sum[1] = av_add_sf(sum[1],

av_mul_sf(sbr->s_m[e][m], sbr->s_m[e][m]));

if (delta && !sbr->s_m[e][m].mant)

sum[1] = av_add_sf(sum[1],

av_mul_sf(sbr->q_m[e][m], sbr->q_m[e][m]));

}

gain_boost = av_sqrt_sf(

av_div_sf(

av_add_sf(FLOAT_EPSILON, sum[0]),

av_add_sf(FLOAT_EPSILON, sum[1])));

if (av_gt_sf(gain_boost, FLOAT_1584893192))

gain_boost = FLOAT_1584893192;

for (m = sbr->f_tablelim[k] - sbr->kx[1]; m < sbr->f_tablelim[k + 1] - sbr->kx[1]; m++) {

sbr->gain[e][m] = av_mul_sf(sbr->gain[e][m], gain_boost);

sbr->q_m[e][m] = av_mul_sf(sbr->q_m[e][m], gain_boost);

sbr->s_m[e][m] = av_mul_sf(sbr->s_m[e][m], gain_boost);

}

}

}

}

/// Assembling HF Signals (14496-3 sp04 p220)

static void sbr_hf_assemble(int Y1[38][64][2],

const int X_high[64][40][2],

SpectralBandReplication *sbr, SBRData *ch_data,

const int e_a[2])

{

int e, i, j, m;

const int h_SL = 4 * !sbr->bs_smoothing_mode;

const int kx = sbr->kx[1];

const int m_max = sbr->m[1];

static const SoftFloat h_smooth[5] = {

{ 715827883, -1 },

{ 647472402, -1 },

{ 937030863, -2 },

{ 989249804, -3 },

{ 546843842, -4 },

};

SoftFloat (*g_temp)[48] = ch_data->g_temp, (*q_temp)[48] = ch_data->q_temp;

int indexnoise = ch_data->f_indexnoise;

int indexsine = ch_data->f_indexsine;

if (sbr->reset) {

for (i = 0; i < h_SL; i++) {

memcpy(g_temp[i + 2*ch_data->t_env[0]], sbr->gain[0], m_max * sizeof(sbr->gain[0][0]));

memcpy(q_temp[i + 2*ch_data->t_env[0]], sbr->q_m[0], m_max * sizeof(sbr->q_m[0][0]));

}

} else if (h_SL) {

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

memcpy(g_temp[i + 2 * ch_data->t_env[0]],

g_temp[i + 2 * ch_data->t_env_num_env_old],

sizeof(g_temp[0]));

memcpy(q_temp[i + 2 * ch_data->t_env[0]],

q_temp[i + 2 * ch_data->t_env_num_env_old],

sizeof(q_temp[0]));

}

}

for (e = 0; e < ch_data->bs_num_env; e++) {

for (i = 2 * ch_data->t_env[e]; i < 2 * ch_data->t_env[e + 1]; i++) {

memcpy(g_temp[h_SL + i], sbr->gain[e], m_max * sizeof(sbr->gain[0][0]));

memcpy(q_temp[h_SL + i], sbr->q_m[e], m_max * sizeof(sbr->q_m[0][0]));

}

}

for (e = 0; e < ch_data->bs_num_env; e++) {

for (i = 2 * ch_data->t_env[e]; i < 2 * ch_data->t_env[e + 1]; i++) {

SoftFloat g_filt_tab[48];

SoftFloat q_filt_tab[48];

SoftFloat *g_filt, *q_filt;

if (h_SL && e != e_a[0] && e != e_a[1]) {

g_filt = g_filt_tab;

q_filt = q_filt_tab;

for (m = 0; m < m_max; m++) {

const int idx1 = i + h_SL;

g_filt[m].mant = g_filt[m].exp = 0;

q_filt[m].mant = q_filt[m].exp = 0;

for (j = 0; j <= h_SL; j++) {

g_filt[m] = av_add_sf(g_filt[m],

av_mul_sf(g_temp[idx1 - j][m],

h_smooth[j]));

q_filt[m] = av_add_sf(q_filt[m],

av_mul_sf(q_temp[idx1 - j][m],

h_smooth[j]));

}

}

} else {

g_filt = g_temp[i + h_SL];

q_filt = q_temp[i];

}

sbr->dsp.hf_g_filt(Y1[i] + kx, X_high + kx, g_filt, m_max,

i + ENVELOPE_ADJUSTMENT_OFFSET);

if (e != e_a[0] && e != e_a[1]) {

sbr->dsp.hf_apply_noise[indexsine](Y1[i] + kx, sbr->s_m[e],

q_filt, indexnoise,

kx, m_max);

} else {

int idx = indexsine&1;

int A = (1-((indexsine+(kx & 1))&2));

int B = (A^(-idx)) + idx;

unsigned *out = &Y1[i][kx][idx];

int shift;

unsigned round;

SoftFloat *in = sbr->s_m[e];

for (m = 0; m+1 < m_max; m+=2) {

int shift2;

shift = 22 - in[m ].exp;

shift2= 22 - in[m+1].exp;

if (shift < 1 || shift2 < 1) {

av_log(NULL, AV_LOG_ERROR, "Overflow in sbr_hf_assemble, shift=%d,%d\n", shift, shift2);

return;

}

if (shift < 32) {

round = 1 << (shift-1);

out[2*m ] += (int)(in[m ].mant * A + round) >> shift;

}

if (shift2 < 32) {

round = 1 << (shift2-1);

out[2*m+2] += (int)(in[m+1].mant * B + round) >> shift2;

}

}

if(m_max&1)

{

shift = 22 - in[m ].exp;

if (shift < 1) {

av_log(NULL, AV_LOG_ERROR, "Overflow in sbr_hf_assemble, shift=%d\n", shift);

return;

} else if (shift < 32) {

round = 1 << (shift-1);

out[2*m ] += (int)(in[m ].mant * A + round) >> shift;

}

}

}

indexnoise = (indexnoise + m_max) & 0x1ff;

indexsine = (indexsine + 1) & 3;

}

}

ch_data->f_indexnoise = indexnoise;

ch_data->f_indexsine = indexsine;

}

#include "aacsbr_template.c"