/******************************************************************************
* *
* Copyright (C) 2018 The Android Open Source Project
*
* 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.
*
*****************************************************************************
* Originally developed and contributed by Ittiam Systems Pvt. Ltd, Bangalore
*/
#include <string.h>
#include "ixheaacd_sbr_common.h"
#include <ixheaacd_type_def.h>
#include "ixheaacd_constants.h"
#include "ixheaacd_basic_ops32.h"
#include "ixheaacd_basic_ops16.h"
#include "ixheaacd_basic_ops40.h"
#include "ixheaacd_basic_ops.h"
#include "ixheaacd_intrinsics.h"
#include "ixheaacd_common_rom.h"
#include "ixheaacd_bitbuffer.h"
#include "ixheaacd_sbrdecsettings.h"
#include "ixheaacd_sbr_scale.h"
#include "ixheaacd_lpp_tran.h"
#include "ixheaacd_env_extr_part.h"
#include "ixheaacd_sbr_rom.h"
#include "ixheaacd_hybrid.h"
#include "ixheaacd_ps_dec.h"
#include "ixheaacd_env_extr.h"
#include "ixheaacd_qmf_dec.h"
#include <ixheaacd_basic_op.h>
#include "ixheaacd_env_calc.h"
#include "ixheaacd_interface.h"
#include "ixheaacd_function_selector.h"
#include "ixheaacd_audioobjtypes.h"
#define mult16x16_16(a, b) ixheaacd_mult16((a), (b))
#define mac16x16(a, b, c) ixheaacd_mac16x16in32((a), (b), (c))
#define mpy_32x16(a, b) fixmuldiv2_32x16b((a), (b))
#define mpy_16x16(a, b) ixheaacd_mult16x16in32((a), (b))
#define mpy_32x32(a, b) ixheaacd_mult32((a), (b))
#define mpy_32x16H_n(a, b) ixheaacd_mult32x16hin32((a), (b))
#define msu16x16(a, b, c) msu16x16in32((a), (b), (c))
#define DCT3_LEN (32)
#define DCT2_LEN (64)
#define LP_SHIFT_VAL 7
#define HQ_SHIFT_64 4
#define RADIXSHIFT 1
#define ROUNDING_SPECTRA 1
#define HQ_SHIFT_VAL 4
VOID ixheaacd_dct3_32(WORD32 *input, WORD32 *output,
const WORD16 *main_twidle_fwd, const WORD16 *post_tbl,
const WORD16 *w_16, const WORD32 *p_table) {
WORD32 n, k;
WORD32 temp1[6];
WORD32 temp2[4];
WORD16 twid_re, twid_im;
WORD32 *ptr_reverse, *ptr_forward, *p_out, *ptr_out1;
const WORD16 *twidle_fwd, *twidle_rev;
ptr_forward = &input[49];
ptr_reverse = &input[47];
p_out = output;
twidle_fwd = main_twidle_fwd;
twidle_fwd += 4;
*p_out++ = input[48] >> LP_SHIFT_VAL;
*p_out++ = 0;
for (n = 1; n < DCT3_LEN / 2; n++) {
temp1[0] = *ptr_forward++;
temp1[1] = *ptr_reverse--;
temp1[0] = ixheaacd_add32(ixheaacd_shr32(temp1[0], LP_SHIFT_VAL),
ixheaacd_shr32(temp1[1], LP_SHIFT_VAL));
temp1[2] = *(ptr_forward - 33);
temp1[3] = *(ptr_reverse - 31);
temp1[1] = ixheaacd_sub32(ixheaacd_shr32(temp1[2], LP_SHIFT_VAL),
ixheaacd_shr32(temp1[3], LP_SHIFT_VAL));
twid_re = *twidle_fwd++;
twid_im = *twidle_fwd;
twidle_fwd += 3;
*p_out++ = mac32x16in32_dual(temp1[0], twid_re, temp1[1], twid_im);
*p_out++ = msu32x16in32_dual(temp1[0], twid_im, temp1[1], twid_re);
}
twid_re = *twidle_fwd++;
twid_im = *twidle_fwd;
twidle_fwd += 3;
temp1[1] = *ptr_reverse--;
temp1[0] = *(ptr_reverse - 31);
temp1[1] = ixheaacd_sub32(ixheaacd_shr32(temp1[1], LP_SHIFT_VAL),
ixheaacd_shr32(temp1[0], LP_SHIFT_VAL));
temp1[0] = temp1[1];
temp2[2] = mac32x16in32_dual(temp1[0], twid_re, temp1[1], twid_im);
temp2[3] = msu32x16in32_dual(temp1[0], twid_im, temp1[1], twid_re);
ptr_forward = output;
ptr_reverse = &output[DCT3_LEN - 1];
temp2[0] = *ptr_forward++;
temp2[1] = *ptr_forward--;
temp1[0] = -temp2[1] - temp2[3];
temp1[1] = temp2[0] - temp2[2];
temp2[0] = (temp2[0] + temp2[2] + temp1[0]);
temp2[1] = (temp2[1] - temp2[3] + temp1[1]);
temp2[0] >>= 1;
temp2[1] >>= 1;
*ptr_forward++ = temp2[0];
*ptr_forward++ = temp2[1];
twidle_fwd = post_tbl + 2;
twidle_rev = post_tbl + 14;
for (n = 1; n < DCT3_LEN / 4; n++) {
temp2[0] = *ptr_forward++;
temp2[1] = *ptr_forward--;
temp2[3] = *ptr_reverse--;
temp2[2] = *ptr_reverse++;
twid_re = *twidle_rev;
twidle_rev -= 2;
twid_im = *twidle_fwd;
twidle_fwd += 2;
temp1[0] = temp2[0] - temp2[2];
temp1[1] = (temp2[0] + temp2[2]);
temp1[2] = temp2[1] + temp2[3];
temp1[3] = (temp2[1] - temp2[3]);
temp1[4] = mac32x16in32_dual(temp1[0], twid_re, temp1[2], twid_im);
temp1[5] = msu32x16in32_dual(temp1[0], twid_im, temp1[2], twid_re);
temp1[1] >>= 1;
temp1[3] >>= 1;
*ptr_forward++ = temp1[1] - temp1[4];
*ptr_forward++ = temp1[3] + temp1[5];
*ptr_reverse-- = -temp1[3] + temp1[5];
*ptr_reverse-- = temp1[1] + temp1[4];
}
temp2[0] = *ptr_forward++;
temp2[1] = *ptr_forward--;
temp2[3] = *ptr_reverse--;
temp2[2] = *ptr_reverse++;
twid_re = *twidle_rev;
twidle_rev -= 2;
twid_im = *twidle_fwd;
twidle_fwd += 2;
temp1[0] = temp2[0] - temp2[2];
temp1[1] = (temp2[0] + temp2[2]);
temp1[2] = temp2[1] + temp2[3];
temp1[3] = (temp2[1] - temp2[3]);
temp1[4] = -mac32x16in32_dual(temp1[0], twid_re, temp1[2], twid_im);
temp1[5] = msu32x16in32_dual(temp1[0], twid_im, temp1[2], twid_re);
temp1[1] >>= 1;
temp1[3] >>= 1;
*ptr_forward++ = temp1[1] + temp1[4];
*ptr_forward++ = temp1[3] + temp1[5];
ixheaacd_radix4bfly(w_16, output, 1, 4);
ixheaacd_postradixcompute4(input, output, p_table, 16);
output[0] = input[0];
output[2] = input[1];
p_out = input + 2;
ptr_forward = output + 1;
ptr_reverse = output + 30;
ptr_out1 = input + 18;
for (k = (DCT3_LEN / 4) - 1; k != 0; k--) {
WORD32 tempre, tempim;
tempre = *p_out++;
tempim = *p_out++;
*ptr_forward = (tempim);
ptr_forward += 2;
*ptr_forward = (tempre);
ptr_forward += 2;
tempre = *ptr_out1++;
tempim = *ptr_out1++;
*ptr_reverse = (tempim);
ptr_reverse -= 2;
*ptr_reverse = (tempre);
ptr_reverse -= 2;
}
{
WORD32 tempre, tempim;
tempre = *p_out++;
tempim = *p_out++;
*ptr_forward = (tempim);
ptr_forward += 2;
*ptr_forward = (tempre);
ptr_forward += 2;
}
return;
}
VOID ixheaacd_dct2_64(WORD32 *x, WORD32 *X,
ia_qmf_dec_tables_struct *qmf_dec_tables_ptr,
WORD16 *filter_states) {
ixheaacd_pretwdct2(x, X);
ixheaacd_sbr_imdct_using_fft(qmf_dec_tables_ptr->w1024, 32, X, x,
qmf_dec_tables_ptr->dig_rev_table2_128,
qmf_dec_tables_ptr->dig_rev_table2_128,
qmf_dec_tables_ptr->dig_rev_table2_128,
qmf_dec_tables_ptr->dig_rev_table2_128);
ixheaacd_fftposttw(x, qmf_dec_tables_ptr);
ixheaacd_posttwdct2(x, filter_states, qmf_dec_tables_ptr);
return;
}
VOID ixheaacd_cos_sin_mod(WORD32 *subband,
ia_sbr_qmf_filter_bank_struct *qmf_bank,
WORD16 *p_twiddle, WORD32 *p_dig_rev_tbl) {
WORD32 M = ixheaacd_shr32(qmf_bank->no_channels, 1);
const WORD16 *p_sin;
const WORD16 *p_sin_cos = &qmf_bank->cos_twiddle[0];
WORD32 subband_tmp[128];
ixheaacd_cos_sin_mod_loop1(subband, M, p_sin_cos, subband_tmp);
if (M == 32) {
ixheaacd_sbr_imdct_using_fft(
(const WORD32 *)p_twiddle, 32, subband_tmp, subband,
(UWORD8 *)p_dig_rev_tbl, (UWORD8 *)p_dig_rev_tbl,
(UWORD8 *)p_dig_rev_tbl, (UWORD8 *)p_dig_rev_tbl);
ixheaacd_sbr_imdct_using_fft(
(const WORD32 *)p_twiddle, 32, &subband_tmp[64], &subband[64],
(UWORD8 *)p_dig_rev_tbl, (UWORD8 *)p_dig_rev_tbl,
(UWORD8 *)p_dig_rev_tbl, (UWORD8 *)p_dig_rev_tbl);
} else {
ixheaacd_sbr_imdct_using_fft(
(const WORD32 *)p_twiddle, 16, subband_tmp, subband,
(UWORD8 *)p_dig_rev_tbl, (UWORD8 *)p_dig_rev_tbl,
(UWORD8 *)p_dig_rev_tbl, (UWORD8 *)p_dig_rev_tbl);
ixheaacd_sbr_imdct_using_fft(
(const WORD32 *)p_twiddle, 16, &subband_tmp[64], &subband[64],
(UWORD8 *)p_dig_rev_tbl, (UWORD8 *)p_dig_rev_tbl,
(UWORD8 *)p_dig_rev_tbl, (UWORD8 *)p_dig_rev_tbl);
}
p_sin = &qmf_bank->alt_sin_twiddle[0];
ixheaacd_cos_sin_mod_loop2(subband, p_sin, M);
}
VOID ixheaacd_fwd_modulation(const WORD32 *p_time_in1, WORD32 *real_subband,
WORD32 *imag_subband,
ia_sbr_qmf_filter_bank_struct *qmf_bank,
ia_qmf_dec_tables_struct *qmf_dec_tables_ptr) {
WORD32 i;
const WORD32 *p_time_in2 = &p_time_in1[2 * NO_ANALYSIS_CHANNELS - 1];
WORD32 temp1, temp2;
WORD32 *t_real_subband = real_subband;
WORD32 *t_imag_subband = imag_subband;
const WORD16 *tcos;
for (i = NO_ANALYSIS_CHANNELS - 1; i >= 0; i--) {
temp1 = ixheaacd_shr32(*p_time_in1++, HQ_SHIFT_VAL);
temp2 = ixheaacd_shr32(*p_time_in2--, HQ_SHIFT_VAL);
*t_real_subband++ = ixheaacd_sub32_sat(temp1, temp2);
;
*t_imag_subband++ = ixheaacd_add32(temp1, temp2);
;
}
ixheaacd_cos_sin_mod(real_subband, qmf_bank,
(WORD16 *)qmf_dec_tables_ptr->w1024,
(WORD32 *)qmf_dec_tables_ptr->dig_rev_table2_128);
tcos = qmf_bank->t_cos;
for (i = (qmf_bank->usb - qmf_bank->lsb - 1); i >= 0; i--) {
WORD16 cosh, sinh;
WORD32 re, im;
re = *real_subband;
im = *imag_subband;
cosh = *tcos++;
sinh = *tcos++;
*real_subband++ = ixheaacd_add32(ixheaacd_mult32x16in32_shl(re, cosh),
ixheaacd_mult32x16in32_shl(im, sinh));
*imag_subband++ = ixheaacd_sub32_sat(ixheaacd_mult32x16in32_shl(im, cosh),
ixheaacd_mult32x16in32_shl(re, sinh));
}
}
VOID ixheaacd_cplx_anal_qmffilt(const WORD16 *time_sample_buf,
ia_sbr_scale_fact_struct *sbr_scale_factor,
WORD32 **qmf_real, WORD32 **qmf_imag,
ia_sbr_qmf_filter_bank_struct *qmf_bank,
ia_qmf_dec_tables_struct *qmf_dec_tables_ptr,
WORD32 ch_fac, WORD32 low_pow_flag,
WORD audio_object_type) {
WORD32 i, k;
WORD32 num_time_slots = qmf_bank->num_time_slots;
WORD32 analysis_buffer[4 * NO_ANALYSIS_CHANNELS];
WORD16 *filter_states = qmf_bank->core_samples_buffer;
WORD16 *fp1, *fp2, *tmp;
WORD16 *filter_1;
WORD16 *filter_2;
WORD16 *filt_ptr;
if (audio_object_type != AOT_ER_AAC_ELD &&
audio_object_type != AOT_ER_AAC_LD) {
qmf_bank->filter_pos +=
(qmf_dec_tables_ptr->qmf_c - qmf_bank->analy_win_coeff);
qmf_bank->analy_win_coeff = qmf_dec_tables_ptr->qmf_c;
} else {
qmf_bank->filter_pos +=
(qmf_dec_tables_ptr->qmf_c_eld3 - qmf_bank->analy_win_coeff);
qmf_bank->analy_win_coeff = qmf_dec_tables_ptr->qmf_c_eld3;
}
filter_1 = qmf_bank->filter_pos;
if (audio_object_type != AOT_ER_AAC_ELD &&
audio_object_type != AOT_ER_AAC_LD) {
filter_2 = filter_1 + 64;
} else {
filter_2 = filter_1 + 32;
}
sbr_scale_factor->st_lb_scale = 0;
sbr_scale_factor->lb_scale = -10;
if (!low_pow_flag) {
if (audio_object_type != AOT_ER_AAC_ELD &&
audio_object_type != AOT_ER_AAC_LD) {
sbr_scale_factor->lb_scale = -8;
} else {
sbr_scale_factor->lb_scale = -9;
}
qmf_bank->cos_twiddle =
(WORD16 *)qmf_dec_tables_ptr->sbr_sin_cos_twiddle_l32;
qmf_bank->alt_sin_twiddle =
(WORD16 *)qmf_dec_tables_ptr->sbr_alt_sin_twiddle_l32;
if (audio_object_type != AOT_ER_AAC_ELD &&
audio_object_type != AOT_ER_AAC_LD) {
qmf_bank->t_cos = (WORD16 *)qmf_dec_tables_ptr->sbr_t_cos_sin_l32;
} else {
qmf_bank->t_cos =
(WORD16 *)qmf_dec_tables_ptr->ixheaacd_sbr_t_cos_sin_l32_eld;
}
}
fp1 = qmf_bank->anal_filter_states;
fp2 = qmf_bank->anal_filter_states + NO_ANALYSIS_CHANNELS;
if (audio_object_type == AOT_ER_AAC_ELD ||
audio_object_type == AOT_ER_AAC_LD) {
filter_2 = qmf_bank->filter_2;
fp1 = qmf_bank->fp1_anal;
fp2 = qmf_bank->fp2_anal;
}
for (i = 0; i < num_time_slots; i++) {
for (k = 0; k < NO_ANALYSIS_CHANNELS; k++)
filter_states[NO_ANALYSIS_CHANNELS - 1 - k] = time_sample_buf[ch_fac * k];
if (audio_object_type != AOT_ER_AAC_ELD &&
audio_object_type != AOT_ER_AAC_LD) {
ixheaacd_sbr_qmfanal32_winadds(fp1, fp2, filter_1, filter_2,
analysis_buffer, filter_states,
time_sample_buf, ch_fac);
}
else {
ixheaacd_sbr_qmfanal32_winadd_eld(fp1, fp2, filter_1, filter_2,
analysis_buffer);
}
time_sample_buf += NO_ANALYSIS_CHANNELS * ch_fac;
filter_states -= NO_ANALYSIS_CHANNELS;
if (filter_states < qmf_bank->anal_filter_states) {
filter_states = qmf_bank->anal_filter_states + 288;
}
tmp = fp1;
fp1 = fp2;
fp2 = tmp;
if (audio_object_type != AOT_ER_AAC_ELD &&
audio_object_type != AOT_ER_AAC_LD) {
filter_1 += 64;
filter_2 += 64;
} else {
filter_1 += 32;
filter_2 += 32;
}
filt_ptr = filter_1;
filter_1 = filter_2;
filter_2 = filt_ptr;
if (audio_object_type != AOT_ER_AAC_ELD &&
audio_object_type != AOT_ER_AAC_LD) {
if (filter_2 > (qmf_bank->analy_win_coeff + 640)) {
filter_1 = (WORD16 *)qmf_bank->analy_win_coeff;
filter_2 = (WORD16 *)qmf_bank->analy_win_coeff + 64;
}
} else {
if (filter_2 > (qmf_bank->analy_win_coeff + 320)) {
filter_1 = (WORD16 *)qmf_bank->analy_win_coeff;
filter_2 = (WORD16 *)qmf_bank->analy_win_coeff + 32;
}
}
if (!low_pow_flag) {
ixheaacd_fwd_modulation(analysis_buffer, qmf_real[i], qmf_imag[i],
qmf_bank, qmf_dec_tables_ptr);
} else {
ixheaacd_dct3_32(
(WORD32 *)analysis_buffer, qmf_real[i], qmf_dec_tables_ptr->dct23_tw,
qmf_dec_tables_ptr->post_fft_tbl, qmf_dec_tables_ptr->w_16,
qmf_dec_tables_ptr->dig_rev_table4_16);
}
}
qmf_bank->filter_pos = filter_1;
qmf_bank->core_samples_buffer = filter_states;
if (audio_object_type == AOT_ER_AAC_ELD || audio_object_type == AOT_ER_AAC_LD)
{
qmf_bank->fp1_anal = fp1;
qmf_bank->fp2_anal = fp2;
qmf_bank->filter_2 = filter_2;
}
}
VOID ixheaacd_inv_modulation_lp(WORD32 *qmf_real, WORD16 *filter_states,
ia_sbr_qmf_filter_bank_struct *syn_qmf,
ia_qmf_dec_tables_struct *qmf_dec_tables_ptr) {
WORD32 L = syn_qmf->no_channels;
const WORD32 M = (L >> 1);
WORD32 *dct_in = qmf_real;
WORD32 time_out[2 * NO_SYNTHESIS_CHANNELS];
WORD32 ui_rem = ((WORD64)(&time_out[0]) % 8);
WORD32 *ptime_out = (pVOID)((WORD8 *)&time_out[0] + 8 - ui_rem);
if (L == 64)
ixheaacd_dct2_64(dct_in, ptime_out, qmf_dec_tables_ptr, filter_states + M);
else
ixheaacd_dct2_32(dct_in, time_out, qmf_dec_tables_ptr, filter_states);
filter_states[3 * M] = 0;
}
VOID ixheaacd_inv_emodulation(WORD32 *qmf_real,
ia_sbr_qmf_filter_bank_struct *syn_qmf,
ia_qmf_dec_tables_struct *qmf_dec_tables_ptr) {
ixheaacd_cos_sin_mod(qmf_real, syn_qmf, (WORD16 *)qmf_dec_tables_ptr->w1024,
(WORD32 *)qmf_dec_tables_ptr->dig_rev_table2_128);
}
VOID ixheaacd_esbr_radix4bfly(const WORD32 *w, WORD32 *x, WORD32 index1,
WORD32 index) {
int i;
WORD32 l1, l2, h2, fft_jmp;
WORD32 xt0_0, yt0_0, xt1_0, yt1_0, xt2_0, yt2_0;
WORD32 xh0_0, xh1_0, xh20_0, xh21_0, xl0_0, xl1_0, xl20_0, xl21_0;
WORD32 x_0, x_1, x_l1_0, x_l1_1, x_l2_0, x_l2_1;
WORD32 x_h2_0, x_h2_1;
WORD32 si10, si20, si30, co10, co20, co30;
WORD64 mul_1, mul_2, mul_3, mul_4, mul_5, mul_6;
WORD64 mul_7, mul_8, mul_9, mul_10, mul_11, mul_12;
WORD32 *x_l1;
WORD32 *x_l2;
WORD32 *x_h2;
const WORD32 *w_ptr = w;
WORD32 i1;
h2 = index << 1;
l1 = index << 2;
l2 = (index << 2) + (index << 1);
x_l1 = &(x[l1]);
x_l2 = &(x[l2]);
x_h2 = &(x[h2]);
fft_jmp = 6 * (index);
for (i1 = 0; i1 < index1; i1++) {
for (i = 0; i < index; i++) {
si10 = (*w_ptr++);
co10 = (*w_ptr++);
si20 = (*w_ptr++);
co20 = (*w_ptr++);
si30 = (*w_ptr++);
co30 = (*w_ptr++);
x_0 = x[0];
x_h2_0 = x[h2];
x_l1_0 = x[l1];
x_l2_0 = x[l2];
xh0_0 = x_0 + x_l1_0;
xl0_0 = x_0 - x_l1_0;
xh20_0 = x_h2_0 + x_l2_0;
xl20_0 = x_h2_0 - x_l2_0;
x[0] = xh0_0 + xh20_0;
xt0_0 = xh0_0 - xh20_0;
x_1 = x[1];
x_h2_1 = x[h2 + 1];
x_l1_1 = x[l1 + 1];
x_l2_1 = x[l2 + 1];
xh1_0 = x_1 + x_l1_1;
xl1_0 = x_1 - x_l1_1;
xh21_0 = x_h2_1 + x_l2_1;
xl21_0 = x_h2_1 - x_l2_1;
x[1] = xh1_0 + xh21_0;
yt0_0 = xh1_0 - xh21_0;
xt1_0 = xl0_0 + xl21_0;
xt2_0 = xl0_0 - xl21_0;
yt2_0 = xl1_0 + xl20_0;
yt1_0 = xl1_0 - xl20_0;
mul_11 = ixheaacd_mult64(xt2_0, co30);
mul_3 = ixheaacd_mult64(yt2_0, si30);
x[l2] = (WORD32)((mul_3 + mul_11) >> 32) << RADIXSHIFT;
mul_5 = ixheaacd_mult64(xt2_0, si30);
mul_9 = ixheaacd_mult64(yt2_0, co30);
x[l2 + 1] = (WORD32)((mul_9 - mul_5) >> 32) << RADIXSHIFT;
mul_12 = ixheaacd_mult64(xt0_0, co20);
mul_2 = ixheaacd_mult64(yt0_0, si20);
x[l1] = (WORD32)((mul_2 + mul_12) >> 32) << RADIXSHIFT;
mul_6 = ixheaacd_mult64(xt0_0, si20);
mul_8 = ixheaacd_mult64(yt0_0, co20);
x[l1 + 1] = (WORD32)((mul_8 - mul_6) >> 32) << RADIXSHIFT;
mul_4 = ixheaacd_mult64(xt1_0, co10);
mul_1 = ixheaacd_mult64(yt1_0, si10);
x[h2] = (WORD32)((mul_1 + mul_4) >> 32) << RADIXSHIFT;
mul_10 = ixheaacd_mult64(xt1_0, si10);
mul_7 = ixheaacd_mult64(yt1_0, co10);
x[h2 + 1] = (WORD32)((mul_7 - mul_10) >> 32) << RADIXSHIFT;
x += 2;
}
x += fft_jmp;
w_ptr = w_ptr - fft_jmp;
}
}
VOID ixheaacd_esbr_postradixcompute2(WORD32 *ptr_y, WORD32 *ptr_x,
const WORD32 *pdig_rev_tbl,
WORD32 npoints) {
WORD32 i, k;
WORD32 h2;
WORD32 x_0, x_1, x_2, x_3;
WORD32 x_4, x_5, x_6, x_7;
WORD32 x_8, x_9, x_a, x_b, x_c, x_d, x_e, x_f;
WORD32 n00, n10, n20, n30, n01, n11, n21, n31;
WORD32 n02, n12, n22, n32, n03, n13, n23, n33;
WORD32 n0, j0;
WORD32 *x2, *x0;
WORD32 *y0, *y1, *y2, *y3;
y0 = ptr_y;
y2 = ptr_y + (WORD32)npoints;
x0 = ptr_x;
x2 = ptr_x + (WORD32)(npoints >> 1);
y1 = y0 + (WORD32)(npoints >> 2);
y3 = y2 + (WORD32)(npoints >> 2);
j0 = 8;
n0 = npoints >> 1;
for (k = 0; k < 2; k++) {
for (i = 0; i<npoints>> 1; i += 8) {
h2 = *pdig_rev_tbl++ >> 2;
x_0 = *x0++;
x_1 = *x0++;
x_2 = *x0++;
x_3 = *x0++;
x_4 = *x0++;
x_5 = *x0++;
x_6 = *x0++;
x_7 = *x0++;
n00 = x_0 + x_2;
n01 = x_1 + x_3;
n20 = x_0 - x_2;
n21 = x_1 - x_3;
n10 = x_4 + x_6;
n11 = x_5 + x_7;
n30 = x_4 - x_6;
n31 = x_5 - x_7;
y0[h2] = n00;
y0[h2 + 1] = n01;
y1[h2] = n10;
y1[h2 + 1] = n11;
y2[h2] = n20;
y2[h2 + 1] = n21;
y3[h2] = n30;
y3[h2 + 1] = n31;
x_8 = *x2++;
x_9 = *x2++;
x_a = *x2++;
x_b = *x2++;
x_c = *x2++;
x_d = *x2++;
x_e = *x2++;
x_f = *x2++;
n02 = x_8 + x_a;
n03 = x_9 + x_b;
n22 = x_8 - x_a;
n23 = x_9 - x_b;
n12 = x_c + x_e;
n13 = x_d + x_f;
n32 = x_c - x_e;
n33 = x_d - x_f;
y0[h2 + 2] = n02;
y0[h2 + 3] = n03;
y1[h2 + 2] = n12;
y1[h2 + 3] = n13;
y2[h2 + 2] = n22;
y2[h2 + 3] = n23;
y3[h2 + 2] = n32;
y3[h2 + 3] = n33;
}
x0 += (WORD32)npoints >> 1;
x2 += (WORD32)npoints >> 1;
}
}
VOID ixheaacd_esbr_postradixcompute4(WORD32 *ptr_y, WORD32 *ptr_x,
const WORD32 *p_dig_rev_tbl,
WORD32 npoints) {
WORD32 i, k;
WORD32 h2;
WORD32 xh0_0, xh1_0, xl0_0, xl1_0;
WORD32 xh0_1, xh1_1, xl0_1, xl1_1;
WORD32 x_0, x_1, x_2, x_3;
WORD32 xh0_2, xh1_2, xl0_2, xl1_2, xh0_3, xh1_3, xl0_3, xl1_3;
WORD32 x_4, x_5, x_6, x_7;
WORD32 x_8, x_9, x_a, x_b, x_c, x_d, x_e, x_f;
WORD32 n00, n10, n20, n30, n01, n11, n21, n31;
WORD32 n02, n12, n22, n32, n03, n13, n23, n33;
WORD32 n0, j0;
WORD32 *x2, *x0;
WORD32 *y0, *y1, *y2, *y3;
y0 = ptr_y;
y2 = ptr_y + (WORD32)npoints;
x0 = ptr_x;
x2 = ptr_x + (WORD32)(npoints >> 1);
y1 = y0 + (WORD32)(npoints >> 1);
y3 = y2 + (WORD32)(npoints >> 1);
j0 = 4;
n0 = npoints >> 2;
for (k = 0; k < 2; k++) {
for (i = 0; i<npoints>> 1; i += 8) {
h2 = *p_dig_rev_tbl++ >> 2;
x_0 = *x0++;
x_1 = *x0++;
x_2 = *x0++;
x_3 = *x0++;
x_4 = *x0++;
x_5 = *x0++;
x_6 = *x0++;
x_7 = *x0++;
xh0_0 = x_0 + x_4;
xh1_0 = x_1 + x_5;
xl0_0 = x_0 - x_4;
xl1_0 = x_1 - x_5;
xh0_1 = x_2 + x_6;
xh1_1 = x_3 + x_7;
xl0_1 = x_2 - x_6;
xl1_1 = x_3 - x_7;
n00 = xh0_0 + xh0_1;
n01 = xh1_0 + xh1_1;
n10 = xl0_0 + xl1_1;
n11 = xl1_0 - xl0_1;
n20 = xh0_0 - xh0_1;
n21 = xh1_0 - xh1_1;
n30 = xl0_0 - xl1_1;
n31 = xl1_0 + xl0_1;
y0[h2] = n00;
y0[h2 + 1] = n01;
y1[h2] = n10;
y1[h2 + 1] = n11;
y2[h2] = n20;
y2[h2 + 1] = n21;
y3[h2] = n30;
y3[h2 + 1] = n31;
x_8 = *x2++;
x_9 = *x2++;
x_a = *x2++;
x_b = *x2++;
x_c = *x2++;
x_d = *x2++;
x_e = *x2++;
x_f = *x2++;
xh0_2 = x_8 + x_c;
xh1_2 = x_9 + x_d;
xl0_2 = x_8 - x_c;
xl1_2 = x_9 - x_d;
xh0_3 = x_a + x_e;
xh1_3 = x_b + x_f;
xl0_3 = x_a - x_e;
xl1_3 = x_b - x_f;
n02 = xh0_2 + xh0_3;
n03 = xh1_2 + xh1_3;
n12 = xl0_2 + xl1_3;
n13 = xl1_2 - xl0_3;
n22 = xh0_2 - xh0_3;
n23 = xh1_2 - xh1_3;
n32 = xl0_2 - xl1_3;
n33 = xl1_2 + xl0_3;
y0[h2 + 2] = n02;
y0[h2 + 3] = n03;
y1[h2 + 2] = n12;
y1[h2 + 3] = n13;
y2[h2 + 2] = n22;
y2[h2 + 3] = n23;
y3[h2 + 2] = n32;
y3[h2 + 3] = n33;
}
x0 += (WORD32)npoints >> 1;
x2 += (WORD32)npoints >> 1;
}
}
VOID ixheaacd_esbr_cos_sin_mod(WORD32 *subband,
ia_sbr_qmf_filter_bank_struct *qmf_bank,
WORD32 *p_twiddle, WORD32 *p_dig_rev_tbl) {
WORD32 z;
WORD32 temp[128];
WORD32 scaleshift = 0;
WORD32 re2, re3;
WORD32 wim, wre;
WORD32 i, M_2;
WORD32 M = ixheaacd_shr32(qmf_bank->no_channels, 1);
const WORD32 *p_sin;
const WORD32 *p_sin_cos;
WORD32 subband_tmp[128];
WORD32 re;
WORD32 im;
WORD32 *psubband, *psubband1;
WORD32 *psubband_t, *psubband1_t;
WORD32 *psubband2, *psubband12;
WORD32 *psubband_t2, *psubband1_t2;
M_2 = ixheaacd_shr32(M, 1);
p_sin_cos = qmf_bank->esbr_cos_twiddle;
psubband = &subband[0];
psubband1 = &subband[2 * M - 1];
psubband_t = subband_tmp;
psubband1_t = &subband_tmp[2 * M - 1];
psubband2 = &subband[64];
psubband12 = &subband[2 * M - 1 + 64];
psubband_t2 = &subband_tmp[64];
psubband1_t2 = &subband_tmp[2 * M - 1 + 64];
for (i = (M_2 >> 1) - 1; i >= 0; i--) {
re = *psubband++;
im = *psubband1--;
wim = *p_sin_cos++;
wre = *p_sin_cos++;
*psubband_t++ = (WORD32)(
(ixheaacd_add64(ixheaacd_mult64(re, wre), ixheaacd_mult64(im, wim))) >>
32);
*psubband_t++ = (WORD32)((ixheaacd_sub64_sat(ixheaacd_mult64(im, wre),
ixheaacd_mult64(re, wim))) >>
32);
re = *psubband2++;
im = *psubband12--;
*psubband_t2++ = (WORD32)((ixheaacd_sub64_sat(ixheaacd_mult64(im, wim),
ixheaacd_mult64(re, wre))) >>
32);
*psubband_t2++ = (WORD32)(
(ixheaacd_add64(ixheaacd_mult64(re, wim), ixheaacd_mult64(im, wre))) >>
32);
re = *psubband1--;
im = *psubband++;
wim = *p_sin_cos++;
wre = *p_sin_cos++;
*psubband1_t-- = (WORD32)((ixheaacd_sub64_sat(ixheaacd_mult64(im, wre),
ixheaacd_mult64(re, wim))) >>
32);
*psubband1_t-- = (WORD32)(
(ixheaacd_add64(ixheaacd_mult64(re, wre), ixheaacd_mult64(im, wim))) >>
32);
re = *psubband12--;
im = *psubband2++;
*psubband1_t2-- = (WORD32)(
(ixheaacd_add64(ixheaacd_mult64(re, wim), ixheaacd_mult64(im, wre))) >>
32);
*psubband1_t2-- = (WORD32)((ixheaacd_sub64_sat(ixheaacd_mult64(im, wim),
ixheaacd_mult64(re, wre))) >>
32);
re = *psubband++;
im = *psubband1--;
wim = *p_sin_cos++;
wre = *p_sin_cos++;
*psubband_t++ = (WORD32)(
(ixheaacd_add64(ixheaacd_mult64(re, wre), ixheaacd_mult64(im, wim))) >>
32);
*psubband_t++ = (WORD32)((ixheaacd_sub64_sat(ixheaacd_mult64(im, wre),
ixheaacd_mult64(re, wim))) >>
32);
re = *psubband2++;
im = *psubband12--;
*psubband_t2++ = (WORD32)((ixheaacd_sub64_sat(ixheaacd_mult64(im, wim),
ixheaacd_mult64(re, wre))) >>
32);
*psubband_t2++ = (WORD32)(
(ixheaacd_add64(ixheaacd_mult64(re, wim), ixheaacd_mult64(im, wre))) >>
32);
re = *psubband1--;
im = *psubband++;
;
wim = *p_sin_cos++;
wre = *p_sin_cos++;
*psubband1_t-- = (WORD32)((ixheaacd_sub64_sat(ixheaacd_mult64(im, wre),
ixheaacd_mult64(re, wim))) >>
32);
*psubband1_t-- = (WORD32)(
(ixheaacd_add64(ixheaacd_mult64(re, wre), ixheaacd_mult64(im, wim))) >>
32);
re = *psubband12--;
im = *psubband2++;
;
*psubband1_t2-- = (WORD32)(
(ixheaacd_add64(ixheaacd_mult64(re, wim), ixheaacd_mult64(im, wre))) >>
32);
*psubband1_t2-- = (WORD32)((ixheaacd_sub64_sat(ixheaacd_mult64(im, wim),
ixheaacd_mult64(re, wre))) >>
32);
}
if (M == 32) {
ixheaacd_esbr_radix4bfly(p_twiddle, subband_tmp, 1, 8);
ixheaacd_esbr_radix4bfly(p_twiddle + 48, subband_tmp, 4, 2);
ixheaacd_esbr_postradixcompute2(subband, subband_tmp, p_dig_rev_tbl, 32);
ixheaacd_esbr_radix4bfly(p_twiddle, &subband_tmp[64], 1, 8);
ixheaacd_esbr_radix4bfly(p_twiddle + 48, &subband_tmp[64], 4, 2);
ixheaacd_esbr_postradixcompute2(&subband[64], &subband_tmp[64],
p_dig_rev_tbl, 32);
}
else if (M == 16) {
ixheaacd_esbr_radix4bfly(p_twiddle, subband_tmp, 1, 4);
ixheaacd_esbr_postradixcompute4(subband, subband_tmp, p_dig_rev_tbl, 16);
ixheaacd_esbr_radix4bfly(p_twiddle, &subband_tmp[64], 1, 4);
ixheaacd_esbr_postradixcompute4(&subband[64], &subband_tmp[64],
p_dig_rev_tbl, 16);
}
else if (M == 12) {
for (z = 0; z < (qmf_bank->no_channels >> 1); z++) {
temp[z] = subband_tmp[2 * z];
temp[12 + z] = subband_tmp[2 * z + 1];
}
ixheaacd_complex_fft_p3(temp, &temp[12], 12, -1, &scaleshift);
for (z = 0; z < (qmf_bank->no_channels >> 1); z++) {
subband[2 * z] = temp[z];
subband[2 * z + 1] = temp[z + 12];
}
scaleshift = 0;
for (z = 0; z < (qmf_bank->no_channels >> 1); z++) {
temp[z] = subband_tmp[64 + 2 * z];
temp[12 + z] = subband_tmp[64 + 2 * z + 1];
}
ixheaacd_complex_fft_p3(temp, &temp[12], 12, -1, &scaleshift);
for (z = 0; z < (qmf_bank->no_channels >> 1); z++) {
subband[64 + 2 * z] = temp[z];
subband[64 + 2 * z + 1] = temp[z + 12];
}
}
else {
for (z = 0; z < (qmf_bank->no_channels >> 1); z++) {
temp[z] = subband_tmp[2 * z];
temp[8 + z] = subband_tmp[2 * z + 1];
}
(*ixheaacd_complex_fft_p2)(temp, &temp[8], 8, -1, &scaleshift);
for (z = 0; z < (qmf_bank->no_channels >> 1); z++) {
subband[2 * z] = temp[z] << scaleshift;
subband[2 * z + 1] = temp[z + 8] << scaleshift;
}
scaleshift = 0;
for (z = 0; z < (qmf_bank->no_channels >> 1); z++) {
temp[z] = subband_tmp[64 + 2 * z];
temp[8 + z] = subband_tmp[64 + 2 * z + 1];
}
(*ixheaacd_complex_fft_p2)(temp, &temp[8], 8, -1, &scaleshift);
for (z = 0; z < (qmf_bank->no_channels >> 1); z++) {
subband[64 + 2 * z] = temp[z] << scaleshift;
subband[64 + 2 * z + 1] = temp[8 + z] << scaleshift;
}
}
psubband = &subband[0];
psubband1 = &subband[2 * M - 1];
re = *psubband1;
*psubband = *psubband >> 1;
psubband++;
*psubband1 = ixheaacd_negate32(*psubband >> 1);
psubband1--;
p_sin = qmf_bank->esbr_alt_sin_twiddle;
wim = *p_sin++;
wre = *p_sin++;
im = *psubband1;
;
*psubband1-- = (WORD32)(
(ixheaacd_add64(ixheaacd_mult64(re, wre), ixheaacd_mult64(im, wim))) >>
32);
*psubband++ = (WORD32)((ixheaacd_sub64_sat(ixheaacd_mult64(im, wre),
ixheaacd_mult64(re, wim))) >>
32);
psubband2 = &subband[64];
psubband12 = &subband[2 * M - 1 + 64];
re = *psubband12;
;
*psubband12-- = ixheaacd_negate32_sat(*psubband2 >> 1);
;
*psubband2 = psubband2[1] >> 1;
;
psubband2++;
im = *psubband12;
;
*psubband2++ = ixheaacd_negate32_sat((WORD32)(
(ixheaacd_add64(ixheaacd_mult64(re, wre), ixheaacd_mult64(im, wim))) >>
32));
*psubband12-- = (WORD32)((ixheaacd_sub64_sat(ixheaacd_mult64(re, wim),
ixheaacd_mult64(im, wre))) >>
32);
for (i = (M_2 - 2); i >= 0; i--) {
im = psubband[0];
;
re = psubband[1];
;
re2 = *psubband1;
;
*psubband++ = (WORD32)(
(ixheaacd_add64(ixheaacd_mult64(re, wim), ixheaacd_mult64(im, wre))) >>
32);
*psubband1-- = (WORD32)((ixheaacd_sub64_sat(ixheaacd_mult64(im, wim),
ixheaacd_mult64(re, wre))) >>
32);
im = psubband2[0];
;
re = psubband2[1];
;
re3 = *psubband12;
;
*psubband12-- = ixheaacd_negate32_sat((WORD32)(
(ixheaacd_add64(ixheaacd_mult64(re, wim), ixheaacd_mult64(im, wre))) >>
32));
*psubband2++ = (WORD32)((ixheaacd_sub64_sat(ixheaacd_mult64(re, wre),
ixheaacd_mult64(im, wim))) >>
32);
wim = *p_sin++;
wre = *p_sin++;
im = psubband1[0];
;
*psubband1-- = (WORD32)(
(ixheaacd_add64(ixheaacd_mult64(re2, wre), ixheaacd_mult64(im, wim))) >>
32);
*psubband++ = (WORD32)((ixheaacd_sub64_sat(ixheaacd_mult64(im, wre),
ixheaacd_mult64(re2, wim))) >>
32);
im = psubband12[0];
;
*psubband2++ = ixheaacd_negate32_sat((WORD32)(
(ixheaacd_add64(ixheaacd_mult64(re3, wre), ixheaacd_mult64(im, wim))) >>
32));
*psubband12-- = (WORD32)((ixheaacd_sub64_sat(ixheaacd_mult64(re3, wim),
ixheaacd_mult64(im, wre))) >>
32);
}
}
VOID ixheaacd_esbr_fwd_modulation(
const WORD32 *time_sample_buf, WORD32 *real_subband, WORD32 *imag_subband,
ia_sbr_qmf_filter_bank_struct *qmf_bank,
ia_qmf_dec_tables_struct *qmf_dec_tables_ptr) {
WORD32 i;
const WORD32 *time_sample_buf1 =
&time_sample_buf[2 * qmf_bank->no_channels - 1];
WORD32 temp1, temp2;
WORD32 *t_real_subband = real_subband;
WORD32 *t_imag_subband = imag_subband;
const WORD32 *tcos;
for (i = qmf_bank->no_channels - 1; i >= 0; i--) {
temp1 = ixheaacd_shr32(*time_sample_buf++, HQ_SHIFT_64);
temp2 = ixheaacd_shr32(*time_sample_buf1--, HQ_SHIFT_64);
*t_real_subband++ = ixheaacd_sub32_sat(temp1, temp2);
;
*t_imag_subband++ = ixheaacd_add32(temp1, temp2);
;
}
ixheaacd_esbr_cos_sin_mod(real_subband, qmf_bank,
qmf_dec_tables_ptr->esbr_w_16,
qmf_dec_tables_ptr->dig_rev_table4_16);
tcos = qmf_bank->esbr_t_cos;
for (i = (qmf_bank->usb - qmf_bank->lsb - 1); i >= 0; i--) {
WORD32 cosh, sinh;
WORD32 re, im;
re = *real_subband;
im = *imag_subband;
cosh = *tcos++;
sinh = *tcos++;
*real_subband++ = (WORD32)((ixheaacd_add64(ixheaacd_mult64(re, cosh),
ixheaacd_mult64(im, sinh))) >>
31);
*imag_subband++ =
(WORD32)((ixheaacd_sub64_sat(ixheaacd_mult64(im, cosh),
ixheaacd_mult64(re, sinh))) >>
31);
}
}
VOID ixheaacd_esbr_qmfsyn64_winadd(WORD32 *tmp1, WORD32 *tmp2, WORD32 *inp1,
WORD32 *sample_buffer, WORD32 ch_fac) {
WORD32 k;
for (k = 0; k < 64; k++) {
WORD64 syn_out = 0;
syn_out =
ixheaacd_add64(syn_out, ixheaacd_mult64(tmp1[0 + k], inp1[k + 0]));
syn_out =
ixheaacd_add64(syn_out, ixheaacd_mult64(tmp1[256 + k], inp1[k + 128]));
syn_out =
ixheaacd_add64(syn_out, ixheaacd_mult64(tmp1[512 + k], inp1[k + 256]));
syn_out =
ixheaacd_add64(syn_out, ixheaacd_mult64(tmp1[768 + k], inp1[k + 384]));
syn_out =
ixheaacd_add64(syn_out, ixheaacd_mult64(tmp1[1024 + k], inp1[k + 512]));
syn_out =
ixheaacd_add64(syn_out, ixheaacd_mult64(tmp2[128 + k], inp1[k + 64]));
syn_out =
ixheaacd_add64(syn_out, ixheaacd_mult64(tmp2[384 + k], inp1[k + 192]));
syn_out =
ixheaacd_add64(syn_out, ixheaacd_mult64(tmp2[640 + k], inp1[k + 320]));
syn_out =
ixheaacd_add64(syn_out, ixheaacd_mult64(tmp2[896 + k], inp1[k + 448]));
syn_out =
ixheaacd_add64(syn_out, ixheaacd_mult64(tmp2[1152 + k], inp1[k + 576]));
sample_buffer[ch_fac * k] = (WORD32)(syn_out >> 31);
}
}
VOID ixheaacd_shiftrountine(WORD32 *qmf_real, WORD32 *qmf_imag, WORD32 len,
WORD32 common_shift) {
WORD32 treal, timag;
WORD32 j;
if (common_shift < 0) {
WORD32 cshift = -common_shift;
cshift = ixheaacd_min32(cshift, 31);
for (j = len - 1; j >= 0; j--) {
treal = *qmf_real;
timag = *qmf_imag;
treal = (ixheaacd_shr32(treal, cshift));
timag = (ixheaacd_shr32(timag, cshift));
*qmf_real++ = treal;
*qmf_imag++ = timag;
}
} else {
for (j = len - 1; j >= 0; j--) {
treal = (ixheaacd_shl32_sat(*qmf_real, common_shift));
timag = (ixheaacd_shl32_sat(*qmf_imag, common_shift));
*qmf_real++ = treal;
*qmf_imag++ = timag;
}
}
}
VOID ixheaacd_shiftrountine_with_rnd_hq(WORD32 *qmf_real, WORD32 *qmf_imag,
WORD32 *filter_states, WORD32 len,
WORD32 shift) {
WORD32 *filter_states_rev = filter_states + len;
WORD32 treal, timag;
WORD32 j;
for (j = (len - 1); j >= 0; j -= 2) {
WORD32 r1, r2, i1, i2;
i2 = qmf_imag[j];
r2 = qmf_real[j];
r1 = *qmf_real++;
i1 = *qmf_imag++;
timag = ixheaacd_add32(i1, r1);
timag = (ixheaacd_shl32_sat(timag, shift));
filter_states_rev[j] = timag;
treal = ixheaacd_sub32(i2, r2);
treal = (ixheaacd_shl32_sat(treal, shift));
filter_states[j] = treal;
treal = ixheaacd_sub32(i1, r1);
treal = (ixheaacd_shl32_sat(treal, shift));
*filter_states++ = treal;
timag = ixheaacd_add32(i2, r2);
timag = (ixheaacd_shl32_sat(timag, shift));
*filter_states_rev++ = timag;
}
}
VOID ixheaacd_radix4bfly(const WORD16 *w, WORD32 *x, WORD32 index1,
WORD32 index) {
int i;
WORD32 l1, l2, h2, fft_jmp;
WORD32 xt0_0, yt0_0, xt1_0, yt1_0, xt2_0, yt2_0;
WORD32 xh0_0, xh1_0, xh20_0, xh21_0, xl0_0, xl1_0, xl20_0, xl21_0;
WORD32 x_0, x_1, x_l1_0, x_l1_1, x_l2_0, x_l2_1;
WORD32 x_h2_0, x_h2_1;
WORD16 si10, si20, si30, co10, co20, co30;
WORD32 mul_1, mul_2, mul_3, mul_4, mul_5, mul_6;
WORD32 mul_7, mul_8, mul_9, mul_10, mul_11, mul_12;
WORD32 *x_l1;
WORD32 *x_l2;
WORD32 *x_h2;
const WORD16 *w_ptr = w;
WORD32 i1;
h2 = index << 1;
l1 = index << 2;
l2 = (index << 2) + (index << 1);
x_l1 = &(x[l1]);
x_l2 = &(x[l2]);
x_h2 = &(x[h2]);
fft_jmp = 6 * (index);
for (i1 = 0; i1 < index1; i1++) {
for (i = 0; i < index; i++) {
si10 = (*w_ptr++);
co10 = (*w_ptr++);
si20 = (*w_ptr++);
co20 = (*w_ptr++);
si30 = (*w_ptr++);
co30 = (*w_ptr++);
x_0 = x[0];
x_h2_0 = x[h2];
x_l1_0 = x[l1];
x_l2_0 = x[l2];
xh0_0 = x_0 + x_l1_0;
xl0_0 = x_0 - x_l1_0;
xh20_0 = x_h2_0 + x_l2_0;
xl20_0 = x_h2_0 - x_l2_0;
x[0] = xh0_0 + xh20_0;
xt0_0 = xh0_0 - xh20_0;
x_1 = x[1];
x_h2_1 = x[h2 + 1];
x_l1_1 = x[l1 + 1];
x_l2_1 = x[l2 + 1];
xh1_0 = x_1 + x_l1_1;
xl1_0 = x_1 - x_l1_1;
xh21_0 = x_h2_1 + x_l2_1;
xl21_0 = x_h2_1 - x_l2_1;
x[1] = xh1_0 + xh21_0;
yt0_0 = xh1_0 - xh21_0;
xt1_0 = xl0_0 + xl21_0;
xt2_0 = xl0_0 - xl21_0;
yt2_0 = xl1_0 + xl20_0;
yt1_0 = xl1_0 - xl20_0;
mul_11 = ixheaacd_mult32x16in32(xt2_0, co30);
mul_3 = ixheaacd_mult32x16in32(yt2_0, si30);
x[l2] = (mul_3 + mul_11) << RADIXSHIFT;
mul_5 = ixheaacd_mult32x16in32(xt2_0, si30);
mul_9 = ixheaacd_mult32x16in32(yt2_0, co30);
x[l2 + 1] = (mul_9 - mul_5) << RADIXSHIFT;
mul_12 = ixheaacd_mult32x16in32(xt0_0, co20);
mul_2 = ixheaacd_mult32x16in32(yt0_0, si20);
x[l1] = (mul_2 + mul_12) << RADIXSHIFT;
mul_6 = ixheaacd_mult32x16in32(xt0_0, si20);
mul_8 = ixheaacd_mult32x16in32(yt0_0, co20);
x[l1 + 1] = (mul_8 - mul_6) << RADIXSHIFT;
mul_4 = ixheaacd_mult32x16in32(xt1_0, co10);
mul_1 = ixheaacd_mult32x16in32(yt1_0, si10);
x[h2] = (mul_1 + mul_4) << RADIXSHIFT;
mul_10 = ixheaacd_mult32x16in32(xt1_0, si10);
mul_7 = ixheaacd_mult32x16in32(yt1_0, co10);
x[h2 + 1] = (mul_7 - mul_10) << RADIXSHIFT;
x += 2;
}
x += fft_jmp;
w_ptr = w_ptr - fft_jmp;
}
}