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/******************************************************************************
* *
* 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 <stdlib.h>
#include <string.h>
#include <math.h>
#include "ixheaacd_type_def.h"
#include "ixheaacd_bitbuffer.h"
#include "ixheaacd_interface.h"
#include "ixheaacd_tns_usac.h"
#include "ixheaacd_cnst.h"
#include "ixheaacd_acelp_info.h"
#include "ixheaacd_td_mdct.h"
#include "ixheaacd_sbrdecsettings.h"
#include "ixheaacd_info.h"
#include "ixheaacd_sbr_common.h"
#include "ixheaacd_drc_data_struct.h"
#include "ixheaacd_drc_dec.h"
#include "ixheaacd_sbrdecoder.h"
#include "ixheaacd_mps_polyphase.h"
#include "ixheaacd_sbr_const.h"
#include "ixheaacd_main.h"
#include "ixheaacd_arith_dec.h"
#include "ixheaacd_windows.h"
#include "ixheaacd_constants.h"
#include "ixheaacd_basic_ops32.h"
#include "ixheaacd_basic_ops40.h"
#include "ixheaacd_func_def.h"
#include "ixheaacd_acelp_com.h"
static PLATFORM_INLINE WORD32 ixheaacd_mult32_m(WORD32 a, WORD32 b) {
WORD32 result;
WORD64 temp_result;
temp_result = (WORD64)a * (WORD64)b;
result = (WORD32)(temp_result >> 31);
return (result);
}
static VOID ixheaacd_weighted_synthesis_filter(WORD32 *a, WORD32 *ap) {
WORD32 f;
WORD32 i;
ap[0] = a[0];
f = IGAMMA1;
for (i = 1; i <= ORDER; i++) {
ap[i] = ixheaacd_mult32_m(f, a[i]);
f = ixheaacd_mult32_m(f, IGAMMA1);
}
return;
}
static VOID ixheaacd_synthesis_tool(WORD32 a[], WORD32 x[], WORD32 l,
WORD32 qshift, WORD32 *preshift) {
WORD32 s;
WORD32 i, j;
for (i = 0; i < l; i++) {
s = x[i];
for (j = 1; j <= ORDER; j += 4) {
s = ixheaacd_sub32_sat(
s, ixheaacd_mul32_sh(a[j], x[i - j], (WORD8)(qshift)));
s = ixheaacd_sub32_sat(
s, ixheaacd_mul32_sh(a[j + 1], x[i - (j + 1)], (WORD8)(qshift)));
s = ixheaacd_sub32_sat(
s, ixheaacd_mul32_sh(a[j + 2], x[i - (j + 2)], (WORD8)(qshift)));
s = ixheaacd_sub32_sat(
s, ixheaacd_mul32_sh(a[j + 3], x[i - (j + 3)], (WORD8)(qshift)));
}
x[i] = s;
}
(*preshift)++;
return;
}
WORD32 ixheaacd_fwd_alias_cancel_tool(
ia_usac_data_struct *usac_data, ia_td_frame_data_struct *pstr_td_frame_data,
WORD32 fac_length, FLOAT32 *lp_filt_coeff, WORD32 gain) {
WORD32 i;
FLOAT32 lp_filt_coeff_a[ORDER + 1];
WORD32 qshift = 0;
WORD32 err = 0;
WORD32 *x_in = pstr_td_frame_data->fac_data;
WORD32 *ptr_scratch = &usac_data->scratch_buffer[0];
WORD32 *fac_signal = &usac_data->x_ac_dec[16];
FLOAT32 fac_signal_flt[128 + 16];
FLOAT32 *ptr_fac_signal_flt = &fac_signal_flt[16];
WORD32 *ptr_overlap_buf =
&(usac_data->overlap_data_ptr[usac_data->present_chan]
[(usac_data->ccfl / 2) - fac_length]);
memset(fac_signal - 16, 0, ORDER * sizeof(WORD32));
err = ixheaacd_acelp_mdct(x_in, fac_signal, &qshift, fac_length, ptr_scratch);
if (err == -1) return err;
ixheaacd_lpc_coeff_wt_apply(lp_filt_coeff, lp_filt_coeff_a);
for (i = 0; i < fac_length; i++)
ptr_fac_signal_flt[i] =
(FLOAT32)((FLOAT32)fac_signal[i] / (1 << (16 - qshift)));
memset(ptr_fac_signal_flt - 16, 0, 16 * sizeof(FLOAT32));
ixheaacd_synthesis_tool_float1(lp_filt_coeff_a, ptr_fac_signal_flt,
fac_length);
for (i = 0; i < fac_length; i++)
fac_signal[i] = (WORD32)(ptr_fac_signal_flt[i] * (1 << (16 - qshift)));
for (i = 0; i < fac_length; i++)
ptr_overlap_buf[i] = ixheaacd_add32_sat(
ptr_overlap_buf[i],
(WORD32)ixheaacd_mul32_sh(fac_signal[i], gain, (WORD8)(16 - qshift)));
return err;
}
WORD32 ixheaacd_fr_alias_cnx_fix(WORD32 *x_in, WORD32 len, WORD32 fac_length,
WORD32 *lp_filt_coeff, WORD32 *izir,
WORD32 *fac_data_out, WORD8 *qshift1,
WORD8 qshift2, WORD8 qshift3, WORD32 *preshift,
WORD32 *ptr_scratch) {
WORD32 i;
const WORD32 *sine_window;
WORD32 fac_window[2 * FAC_LENGTH];
WORD32 lp_filt_coeff_a[ORDER + 1];
WORD32 err = 0;
if (fac_length == 48) {
sine_window = ixheaacd_sine_win_96;
} else if (fac_length == 64) {
sine_window = ixheaacd_sine_win_128;
} else if (fac_length == 96) {
sine_window = ixheaacd_sine_win_192;
} else {
sine_window = ixheaacd_sine_win_256;
}
if (FAC_LENGTH < fac_length) {
return -1;
}
if (FAC_LENGTH < fac_length) {
return -1;
}
if ((1 + (len / 2)) < (fac_length + 1)) {
return -1;
}
if ((len / 2 + 1) > (2 * LEN_FRAME - fac_length - 1)) {
return -1;
}
if (lp_filt_coeff != NULL && fac_data_out != NULL) {
memset(fac_data_out - 16, 0, ORDER * sizeof(WORD32));
err = ixheaacd_acelp_mdct(x_in, fac_data_out, preshift, fac_length,
ptr_scratch);
if (err == -1) return err;
ixheaacd_weighted_synthesis_filter(lp_filt_coeff, lp_filt_coeff_a);
memset(fac_data_out + fac_length, 0, fac_length * sizeof(WORD32));
ixheaacd_synthesis_tool(lp_filt_coeff_a, fac_data_out, 2 * fac_length,
qshift2, preshift);
if (izir != NULL) {
for (i = 0; i < fac_length; i++) {
fac_window[i] = ixheaacd_mult32_m(
sine_window[i], sine_window[(2 * fac_length) - 1 - i]);
fac_window[fac_length + i] =
2147483647 - ixheaacd_mult32_m(sine_window[fac_length + i],
sine_window[fac_length + i]);
}
for (i = 0; i < fac_length; i++) {
WORD32 temp1;
WORD32 temp2;
temp1 = ixheaacd_mul32_sh(
izir[1 + (len / 2) + i], fac_window[fac_length + i],
(char)((qshift3 - *qshift1 + 31 + (WORD8)(*preshift))));
temp2 = ixheaacd_mul32_sh(
izir[1 + (len / 2) - 1 - i], fac_window[fac_length - 1 - i],
(char)((qshift3 - *qshift1 + 31 + (WORD8)(*preshift))));
fac_data_out[i] =
ixheaacd_add32_sat3((fac_data_out[i] / 2), temp1, temp2);
fac_data_out[fac_length + i] = (fac_data_out[fac_length + i] / 2);
}
}
}
return err;
}
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