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aosp12/external/libxaac/decoder/ixheaacd_lpfuncs.c

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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 <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_bitbuffer.h"
#include "ixheaacd_basic_op.h"
#include "ixheaacd_intrinsics.h"
#include "ixheaacd_defines.h"
#include "ixheaacd_aac_rom.h"
#include "ixheaacd_definitions.h"
#include "ixheaacd_error_codes.h"
#include "ixheaacd_pulsedata.h"
#include "ixheaacd_pns.h"
#include "ixheaacd_drc_data_struct.h"
#include "ixheaacd_lt_predict.h"
#include "ixheaacd_channelinfo.h"
#include "ixheaacd_cnst.h"
#include "ixheaacd_drc_dec.h"
#include "ixheaacd_sbrdecoder.h"
#include "ixheaacd_block.h"
#include "ixheaacd_channel.h"
#include "ixheaacd_sbr_payload.h"
#include "ixheaacd_common_rom.h"
#include "ixheaacd_sbrdecsettings.h"
#include "ixheaacd_sbr_scale.h"
#include "ixheaacd_env_extr_part.h"
#include "ixheaacd_sbr_rom.h"
#include "ixheaacd_lpp_tran.h"
#include "ixheaacd_hybrid.h"
#include "ixheaacd_ps_dec.h"
#include "ixheaacd_env_extr.h"
#include "ixheaacd_adts.h"
#include "ixheaacd_audioobjtypes.h"
#include "ixheaacd_memory_standards.h"
#include "ixheaacd_latmdemux.h"
#include "ixheaacd_aacdec.h"
#include "ixheaacd_mps_polyphase.h"
#include "ixheaacd_config.h"
#include "ixheaacd_mps_dec.h"
#include "ixheaacd_struct_def.h"
#include "ixheaacd_tns.h"
#include "ixheaacd_aac_imdct.h"
#include "ixheaacd_multichannel.h"
#include "ixheaacd_function_selector.h"
static PLATFORM_INLINE WORD32 ixheaacd_shr32_drc(WORD32 a, WORD32 b) {
WORD32 out_val;
b = ((UWORD32)(b << 24) >> 24);
if (b >= 31) {
if (a < 0)
out_val = -1;
else
out_val = 0;
} else {
a = ixheaacd_add32_sat(a, (1 << (b - 1)));
out_val = (WORD32)a >> b;
}
return out_val;
}
static PLATFORM_INLINE WORD32 ixheaacd_mult32x16in32_drc(WORD32 a, WORD16 b) {
WORD32 result;
WORD64 temp_result;
temp_result = (WORD64)a * (WORD64)b;
if (temp_result < (WORD64)MIN_32)
result = MIN_32;
else if (temp_result > (WORD64)MAX_32)
result = MAX_32;
else
result = (WORD32)(temp_result);
return (result);
}
VOID ixheaacd_process_win_seq(WORD32 *coef, WORD32 *prev, WORD16 *out,
const WORD16 *window_long,
const WORD16 *window_short, WORD16 q_shift,
WORD16 ch_fac, WORD16 flag) {
WORD32 i, accu;
WORD32 *coef_1;
const WORD16 *temp_win_sh, *temp_win_long;
WORD16 *out1, *out2;
WORD32 *temp_prev;
if (flag == 1) {
for (i = 0; i < SIZE07; i++) {
WORD32 temp1 = ixheaacd_shl32_dir_sat_limit(
ixheaacd_mult32x16in32(coef[SIZE08 + i], window_long[2 * i]),
(q_shift + 1));
accu = ixheaacd_add32_sat(temp1, ((WORD32)prev[i] << 16));
out[ch_fac * i] = ixheaacd_round16(accu << 1);
accu = ixheaacd_shl32_dir_sat_limit(
ixheaacd_mult32x16in32(-(coef[SIZE15 - 1 - i]),
window_long[2 * (SIZE07 - i) - 1]),
q_shift);
out[ch_fac * (i + SIZE09)] = ixheaacd_round16(accu << 2);
}
temp_win_sh = &(window_short[0]);
coef_1 = &(coef[SIZE15]);
temp_win_long = &(window_long[SIZE14]);
temp_prev = &(prev[SIZE08 - 1]);
out1 = &(out[ch_fac * (SIZE07)]);
out2 = &(out[ch_fac * (SIZE09 - 1)]);
} else {
for (i = 0; i < SIZE07; i++) {
accu = ixheaacd_mult32x16in32_drc(
prev[SIZE08 - 1 - i], ixheaacd_negate16(window_long[2 * i + 1]));
out[ch_fac * i] = ixheaacd_round16(accu << 2);
accu = ixheaacd_sub32_sat(
ixheaacd_shl32_dir_sat_limit(-(coef[SIZE15 - 1 - i]), (q_shift - 1)),
ixheaacd_mult32x16in32_drc(prev[i + SIZE01],
window_long[2 * SIZE07 - 2 - 2 * i]));
out[ch_fac * (SIZE09 + i)] = ixheaacd_round16(accu << 2);
}
temp_win_sh = &(window_long[SIZE14]);
coef_1 = &(coef[SIZE15]);
temp_win_long = &(window_short[0]);
temp_prev = &(prev[SIZE01 - 1]);
out1 = &(out[ch_fac * (SIZE07)]);
out2 = &(out[ch_fac * (SIZE09 - 1)]);
}
for (i = SIZE01 - 1; i >= 0; i--) {
WORD32 temp_coef = *coef_1++;
WORD16 win1 = *temp_win_long++;
WORD16 win2 = *temp_win_long++;
WORD32 prev1 = *temp_prev--;
WORD16 win4 = *temp_win_sh++;
WORD16 win3 = *temp_win_sh++;
accu = ixheaacd_sub32_sat(
ixheaacd_shl32_dir_sat_limit(ixheaacd_mult32x16in32(temp_coef, win1),
q_shift),
ixheaacd_mult32x16in32_drc(prev1, win3));
*out1 = ixheaacd_round16(accu << 2);
out1 += ch_fac;
accu = ixheaacd_sub32_sat(
ixheaacd_shl32_dir_sat_limit(
ixheaacd_mult32x16in32(ixheaacd_negate32_sat(temp_coef), win2),
q_shift),
ixheaacd_mult32x16in32_drc(prev1, win4));
*out2 = ixheaacd_round16(accu << 2);
out2 -= ch_fac;
}
}
static PLATFORM_INLINE VOID ixheaacd_long_short_win_process(
WORD32 *current, WORD32 *prev, WORD16 *out, const WORD16 *short_window,
const WORD16 *long_window_prev, WORD16 q_shift, WORD16 ch_fac,
WORD32 flag) {
WORD i;
WORD32 accu;
WORD32 *current_tmp1 = &(current[(SIZE03 - 1)]);
WORD32 *current_tmp2 = &(current[-SIZE01]);
const WORD16 *short_ptr = &(short_window[SIZE02 - 1]);
for (i = SIZE01 - 1; i >= 0; i--) {
WORD32 tmp1_cur = *current_tmp1--;
WORD32 tmp2_cur = *current_tmp2++;
WORD16 short1 = *short_ptr--;
WORD16 short2 = *short_ptr--;
accu = ixheaacd_sub32_sat(
ixheaacd_shl32_dir_sat_limit((ixheaacd_mult32x16in32(tmp1_cur, short2) -
ixheaacd_mult32x16in32(tmp2_cur, short1)),
q_shift),
ixheaacd_mult32x16in32_drc(prev[i], long_window_prev[0 - 2 - 2 * i]));
out[ch_fac * (0 + i)] = ixheaacd_round16(accu << 2);
if (flag) {
accu = ixheaacd_sub32_sat(
ixheaacd_shl32_dir_sat_limit(
(ixheaacd_mult32x16in32(-(tmp1_cur), short1) -
ixheaacd_mult32x16in32(tmp2_cur, short2)),
q_shift),
ixheaacd_mult32x16in32_drc(prev[SIZE02 - 1 - i],
long_window_prev[-2 * SIZE02 + 2 * i]));
out[ch_fac * (SIZE02 - 1 - i)] = ixheaacd_round16(accu << 2);
}
}
}
VOID ixheaacd_long_short_win_seq(WORD32 *current, WORD32 *prev, WORD16 *out,
const WORD16 *short_window,
const WORD16 *short_window_prev,
const WORD16 *long_window_prev, WORD16 q_shift,
WORD16 ch_fac) {
WORD32 i, flag;
WORD32 accu;
for (i = 0; i < SIZE07; i++) {
accu = ixheaacd_mult32x16in32_drc(
prev[SIZE08 - 1 - i], ixheaacd_negate16(long_window_prev[2 * i + 1]));
out[ch_fac * i] = ixheaacd_round16(accu << 2);
}
for (i = 0; i < SIZE01; i++) {
accu = ixheaacd_sub32_sat(
ixheaacd_shl32_dir_sat_limit(
ixheaacd_mult32x16in32(current[SIZE01 + i],
short_window_prev[2 * i]),
q_shift),
ixheaacd_mult32x16in32_drc(prev[SIZE01 - 1 - i],
long_window_prev[2 * SIZE07 + 1 + 2 * i]));
out[ch_fac * (SIZE07 + i)] = ixheaacd_round16(accu << 2);
}
for (i = 0; i < SIZE01; i++) {
accu = ixheaacd_sub32_sat(
ixheaacd_shl32_dir_sat_limit(
ixheaacd_mult32x16in32(-(current[SIZE02 - 1 - i]),
short_window_prev[SIZE02 - 2 * i - 1]),
q_shift),
ixheaacd_mult32x16in32_drc(prev[i],
long_window_prev[SIZE16 - 2 - (2 * i)]));
out[ch_fac * (SIZE08 + i)] = ixheaacd_round16(accu << 2);
}
flag = 1;
for (i = 0; i < 4; i++) {
WORD32 inc = i * SIZE02;
if (i == 3) {
flag = 0;
}
ixheaacd_long_short_win_process(&current[SIZE01 + inc], &prev[SIZE01 + inc],
&out[ch_fac * (SIZE09 + inc)], short_window,
&long_window_prev[2 * (SIZE07 - inc)],
q_shift, ch_fac, flag);
}
for (i = 0; i < SIZE01; i++) {
accu = (ixheaacd_mult32x16in32(-(current[SIZE10 - 1 - i]),
short_window[SIZE02 - 2 * i - 1]) -
ixheaacd_mult32x16in32(current[SIZE06 + i],
short_window[SIZE02 - 2 * i - 2]));
prev[i] =
ixheaacd_round16(ixheaacd_shl32_dir_sat_limit(accu, (q_shift + 1)));
}
}
VOID ixheaacd_nolap1_32(WORD32 *coef,
WORD32 *out,
WORD16 q_shift, WORD16 ch_fac) {
WORD32 i;
for (i = 0; i < SIZE07; i++) {
out[ch_fac * i] = ixheaacd_shr32_drc(
ixheaacd_negate32_sat(coef[SIZE07 - 1 - i]), 16 - q_shift);
}
}
VOID ixheaacd_neg_shift_spec_dec(WORD32 *coef, WORD16 *out, WORD16 q_shift,
WORD16 ch_fac) {
WORD32 i;
for (i = 0; i < SIZE07; i++) {
out[ch_fac * i] = ixheaacd_round16(ixheaacd_shl32_dir_sat_limit(
ixheaacd_negate32_sat(coef[SIZE07 - 1 - i]), q_shift));
}
}
VOID ixheaacd_spec_to_overlapbuf_dec(WORD32 *ptr_overlap_buf,
WORD32 *ptr_spec_coeff, WORD32 q_shift,
WORD32 size) {
WORD32 i;
for (i = 0; i < size; i++) {
ptr_overlap_buf[i] = ixheaacd_shr32_drc(ptr_spec_coeff[i], 16 - q_shift);
}
}
VOID ixheaacd_overlap_buf_out_dec(WORD16 *out_samples, WORD32 *ptr_overlap_buf,
WORD32 size, const WORD16 ch_fac) {
WORD32 i;
for (i = 0; i < size; i++) {
out_samples[ch_fac * i] = ixheaacd_shl16_sat((WORD16)ptr_overlap_buf[i], 1);
}
}
VOID ixheaacd_overlap_out_copy_dec(WORD16 *out_samples, WORD32 *ptr_overlap_buf,
WORD32 *ptr_overlap_buf1,
const WORD16 ch_fac) {
WORD32 i;
for (i = 0; i < SIZE01; i++) {
out_samples[ch_fac * i] = ixheaacd_shl16_sat((WORD16)ptr_overlap_buf[i], 1);
ptr_overlap_buf[i] = ptr_overlap_buf1[i];
}
}
VOID ixheaacd_imdct_process(ia_aac_dec_overlap_info *ptr_aac_dec_overlap_info,
WORD32 *ptr_spec_coeff,
ia_ics_info_struct *ptr_ics_info,
WORD16 out_samples[], const WORD16 ch_fac,
WORD32 *scratch,
ia_aac_dec_tables_struct *ptr_aac_tables,
WORD32 object_type) {
WORD32 *ptr_overlap_buf;
const WORD16 *ptr_long_window;
const WORD16 *ptr_short_window;
ptr_overlap_buf = ptr_aac_dec_overlap_info->ptr_overlap_buf;
ptr_long_window =
ptr_aac_dec_overlap_info
->ptr_long_window[(WORD32)ptr_aac_dec_overlap_info->window_shape];
ptr_short_window =
ptr_aac_dec_overlap_info
->ptr_short_window[(WORD32)ptr_aac_dec_overlap_info->window_shape];
if (ptr_ics_info->window_sequence != EIGHT_SHORT_SEQUENCE) {
WORD16 q_shift;
WORD32 expo, imdct_scale;
if ((512 == ptr_ics_info->frame_length) ||
(480 == ptr_ics_info->frame_length)) {
if (512 == ptr_ics_info->frame_length) {
WORD32 *ld_cos_sin_ptr =
(WORD32 *)ptr_aac_tables->pstr_imdct_tables->cosine_array_1024;
ixheaacd_inverse_transform_512(
ptr_spec_coeff, scratch, &imdct_scale, ld_cos_sin_ptr,
ptr_aac_tables->pstr_imdct_tables, object_type);
} else {
ixheaacd_mdct_480_ld(ptr_spec_coeff, scratch, &imdct_scale, 0,
ptr_aac_tables->pstr_imdct_tables, object_type);
}
if (object_type == AOT_ER_AAC_ELD) {
int i, N = (ptr_ics_info->frame_length << 1);
for (i = 0; i < N / 2; i++) {
ptr_spec_coeff[i] = -ptr_spec_coeff[i + N];
ptr_spec_coeff[i + N + N / 2] = -ptr_spec_coeff[i + N / 2];
}
}
} else
{
expo = (*ixheaacd_calc_max_spectral_line)(ptr_spec_coeff, 1024) - 1;
expo = 8 - expo;
imdct_scale = ixheaacd_inverse_transform(
ptr_spec_coeff, scratch, ptr_aac_tables->pstr_imdct_tables, expo,
1024);
}
q_shift = (31 + imdct_scale) + (-1 - 16 - 9);
switch (ptr_ics_info->window_sequence) {
case ONLY_LONG_SEQUENCE:
switch (ptr_aac_dec_overlap_info->window_sequence) {
case ONLY_LONG_SEQUENCE:
case LONG_STOP_SEQUENCE:
if (1024 == ptr_ics_info->frame_length) {
ia_ics_info_struct *tmp_ptr_ics_info = ptr_ics_info;
(*ixheaacd_post_twid_overlap_add)(
out_samples, ptr_spec_coeff,
ptr_aac_tables->pstr_imdct_tables, 1024, ptr_overlap_buf,
q_shift, ptr_long_window, ch_fac);
ptr_ics_info = tmp_ptr_ics_info;
}
if ((512 == ptr_ics_info->frame_length) ||
(480 == ptr_ics_info->frame_length)) {
if (object_type != AOT_ER_AAC_ELD) {
if (512 == ptr_ics_info->frame_length) {
ixheaacd_lap1_512_480(ptr_spec_coeff, ptr_overlap_buf,
out_samples, ptr_long_window, q_shift,
SIZE04, ch_fac);
ixheaacd_spec_to_overlapbuf(ptr_overlap_buf, ptr_spec_coeff,
q_shift, SIZE04);
} else if (480 == ptr_ics_info->frame_length) {
ixheaacd_lap1_512_480(ptr_spec_coeff, ptr_overlap_buf,
out_samples, ptr_long_window, q_shift,
240, ch_fac);
ixheaacd_spec_to_overlapbuf(ptr_overlap_buf, ptr_spec_coeff,
q_shift, 240);
}
} else {
ixheaacd_eld_dec_windowing(
ptr_spec_coeff, ptr_long_window, ptr_ics_info->frame_length,
q_shift, ptr_overlap_buf, ch_fac, out_samples);
}
}
break;
case LONG_START_SEQUENCE:
case EIGHT_SHORT_SEQUENCE:
if (1024 == ptr_ics_info->frame_length) {
(*ixheaacd_post_twiddle)(scratch, ptr_spec_coeff,
ptr_aac_tables->pstr_imdct_tables, 1024);
}
ixheaacd_process_win_seq(scratch, ptr_overlap_buf, out_samples,
ptr_long_window, ptr_short_window, q_shift,
ch_fac, 1);
if (512 == ptr_ics_info->frame_length) {
ixheaacd_spec_to_overlapbuf(ptr_overlap_buf, ptr_spec_coeff,
q_shift, SIZE04);
} else if (480 == ptr_ics_info->frame_length) {
ixheaacd_spec_to_overlapbuf(ptr_overlap_buf, ptr_spec_coeff,
q_shift, 240);
} else {
(*ixheaacd_spec_to_overlapbuf)(ptr_overlap_buf, scratch, q_shift,
SIZE08);
}
break;
}
break;
case LONG_START_SEQUENCE:
if (1024 == ptr_ics_info->frame_length) {
(*ixheaacd_post_twiddle)(scratch, ptr_spec_coeff,
ptr_aac_tables->pstr_imdct_tables, 1024);
}
switch (ptr_aac_dec_overlap_info->window_sequence) {
case ONLY_LONG_SEQUENCE:
case LONG_STOP_SEQUENCE:
(*ixheaacd_over_lap_add1)(scratch, ptr_overlap_buf, out_samples,
ptr_long_window, q_shift, SIZE08, ch_fac);
break;
case LONG_START_SEQUENCE:
case EIGHT_SHORT_SEQUENCE:
ixheaacd_process_win_seq(scratch, ptr_overlap_buf, out_samples,
ptr_long_window, ptr_short_window, q_shift,
ch_fac, 1);
break;
}
ixheaacd_nolap1_32(&scratch[SIZE01], ptr_overlap_buf, q_shift, 1);
(*ixheaacd_spec_to_overlapbuf)(&ptr_overlap_buf[SIZE07], scratch,
q_shift, SIZE01);
break;
case LONG_STOP_SEQUENCE:
if (1024 == ptr_ics_info->frame_length) {
(*ixheaacd_post_twiddle)(scratch, ptr_spec_coeff,
ptr_aac_tables->pstr_imdct_tables, 1024);
}
switch (ptr_aac_dec_overlap_info->window_sequence) {
case EIGHT_SHORT_SEQUENCE:
case LONG_START_SEQUENCE:
(*ixheaacd_overlap_buf_out)(out_samples, ptr_overlap_buf, SIZE07,
ch_fac);
(*ixheaacd_over_lap_add1)(
&scratch[SIZE14], &ptr_overlap_buf[SIZE07],
&out_samples[ch_fac * (SIZE07)], ptr_short_window, q_shift,
SIZE01, ch_fac);
{
WORD16 q_shift1 = q_shift + 1;
(*ixheaacd_neg_shift_spec)(&scratch[SIZE08],
&out_samples[ch_fac * SIZE09],
q_shift1, ch_fac);
}
break;
case ONLY_LONG_SEQUENCE:
case LONG_STOP_SEQUENCE:
ixheaacd_process_win_seq(scratch, ptr_overlap_buf, out_samples,
ptr_long_window, ptr_short_window, q_shift,
ch_fac, 0);
break;
}
(*ixheaacd_spec_to_overlapbuf)(ptr_overlap_buf, scratch, q_shift,
SIZE08);
break;
}
} else {
WORD16 q_shift, max_scale;
WORD32 imdct_scale[8], i;
const WORD16 *short_window;
short_window = ptr_aac_dec_overlap_info
->ptr_short_window[(WORD32)ptr_ics_info->window_shape];
{
WORD32 expo;
expo = (*ixheaacd_calc_max_spectral_line)(ptr_spec_coeff, 1024) - 1;
expo = 5 - expo;
for (i = 0; i < MAX_WINDOWS; i++) {
imdct_scale[i] = ixheaacd_inverse_transform(
&ptr_spec_coeff[i * SIZE02], &scratch[i * SIZE02],
ptr_aac_tables->pstr_imdct_tables, expo, 128);
(*ixheaacd_post_twiddle)(&scratch[i * SIZE02],
&ptr_spec_coeff[i * SIZE02],
ptr_aac_tables->pstr_imdct_tables, 128);
}
}
max_scale = 31 + imdct_scale[0];
q_shift = max_scale + (-16 - 6 - 1);
switch (ptr_aac_dec_overlap_info->window_sequence) {
WORD32 overlap_buf_loc[SIZE01];
case EIGHT_SHORT_SEQUENCE:
case LONG_START_SEQUENCE:
(*ixheaacd_overlap_buf_out)(out_samples, ptr_overlap_buf, SIZE07,
ch_fac);
(*ixheaacd_over_lap_add1)(&scratch[0], &ptr_overlap_buf[SIZE07],
&out_samples[ch_fac * SIZE07],
ptr_short_window, q_shift, SIZE01, ch_fac);
for (i = 0; i < 3; i++) {
WORD32 inc = (i * SIZE02);
(*ixheaacd_spec_to_overlapbuf)(overlap_buf_loc, &scratch[inc],
q_shift, SIZE01);
(*ixheaacd_over_lap_add1)(&scratch[SIZE02 + inc], overlap_buf_loc,
&out_samples[ch_fac * (SIZE09 + inc)],
short_window, q_shift, SIZE01, ch_fac);
}
(*ixheaacd_over_lap_add2)(&scratch[SIZE08], &scratch[SIZE06],
ptr_overlap_buf, short_window, q_shift,
SIZE01, 1);
(*ixheaacd_overlap_out_copy)(&out_samples[ch_fac * SIZE15],
ptr_overlap_buf, &ptr_overlap_buf[SIZE01],
ch_fac);
break;
case ONLY_LONG_SEQUENCE:
case LONG_STOP_SEQUENCE:
ixheaacd_long_short_win_seq(scratch, ptr_overlap_buf, out_samples,
short_window, ptr_short_window,
ptr_long_window, q_shift, ch_fac);
break;
}
for (i = 0; i < 3; i++) {
WORD32 inc = (i * SIZE02);
(*ixheaacd_over_lap_add2)(&scratch[SIZE10 + inc], &scratch[SIZE08 + inc],
&ptr_overlap_buf[SIZE01 + inc], short_window,
q_shift, SIZE01, 1);
}
(*ixheaacd_spec_to_overlapbuf)(&ptr_overlap_buf[SIZE07], &scratch[SIZE14],
q_shift, SIZE01);
}
ptr_aac_dec_overlap_info->window_shape = ptr_ics_info->window_shape;
ptr_aac_dec_overlap_info->window_sequence = ptr_ics_info->window_sequence;
}
void ixheaacd_eld_dec_windowing(WORD32 *ptr_spect_coeff, const WORD16 *p_win,
WORD32 framesize, WORD16 q_shift,
WORD32 *p_overlap_buffer, const WORD16 stride,
WORD16 *out_samples)
{
int i = 0;
int loop_size;
WORD32 *ptr_z = ptr_spect_coeff;
WORD32 *ptr_out, *p_out2;
WORD32 *p_overlap_buffer32 = (WORD32 *)p_overlap_buffer;
WORD32 delay = framesize >> 2;
ptr_z = ptr_spect_coeff + delay;
p_win += delay;
ptr_out = p_overlap_buffer32;
q_shift = q_shift + 2;
if (q_shift >= 0) {
for (i = (delay)-1; i >= 0; i--) {
WORD32 win_op;
WORD32 win_ovadd_op;
WORD16 win_val;
win_val = *p_win++;
win_op = ixheaacd_mult32x16in32(*ptr_z++, (win_val));
win_ovadd_op =
ixheaacd_add32_sat(ixheaacd_shl32(win_op, q_shift), *ptr_out++);
*out_samples = ixheaacd_round16(ixheaacd_shl32_sat(win_ovadd_op, 1));
out_samples += stride;
win_val = *p_win++;
win_op = ixheaacd_mult32x16in32(*ptr_z++, (win_val));
win_ovadd_op =
ixheaacd_add32_sat(ixheaacd_shl32(win_op, q_shift), *ptr_out++);
*out_samples = ixheaacd_round16(ixheaacd_shl32_sat(win_ovadd_op, 1));
out_samples += stride;
win_val = *p_win++;
win_op = ixheaacd_mult32x16in32(*ptr_z++, (win_val));
win_ovadd_op =
ixheaacd_add32_sat(ixheaacd_shl32(win_op, q_shift), *ptr_out++);
*out_samples = ixheaacd_round16(ixheaacd_shl32_sat(win_ovadd_op, 1));
out_samples += stride;
win_val = *p_win++;
win_op = ixheaacd_mult32x16in32(*ptr_z++, (win_val));
win_ovadd_op =
ixheaacd_add32_sat(ixheaacd_shl32(win_op, q_shift), *ptr_out++);
*out_samples = ixheaacd_round16(ixheaacd_shl32_sat(win_ovadd_op, 1));
out_samples += stride;
}
p_out2 = p_overlap_buffer32;
loop_size = (((framesize * 3) - framesize) >> 2) - 1;
for (i = loop_size; i >= 0; i--) {
WORD32 win_op;
WORD16 win_val;
win_val = *p_win++;
win_op = ixheaacd_mult32x16in32(*ptr_z++, (win_val));
*p_out2++ =
ixheaacd_add32_sat(ixheaacd_shl32(win_op, q_shift), *ptr_out++);
win_val = *p_win++;
win_op = ixheaacd_mult32x16in32(*ptr_z++, (win_val));
*p_out2++ =
ixheaacd_add32_sat(ixheaacd_shl32(win_op, q_shift), *ptr_out++);
win_val = *p_win++;
win_op = ixheaacd_mult32x16in32(*ptr_z++, (win_val));
*p_out2++ =
ixheaacd_add32_sat(ixheaacd_shl32(win_op, q_shift), *ptr_out++);
win_val = *p_win++;
win_op = ixheaacd_mult32x16in32(*ptr_z++, (win_val));
*p_out2++ =
ixheaacd_add32_sat(ixheaacd_shl32(win_op, q_shift), *ptr_out++);
}
loop_size = ((((framesize << 2) - delay) - (framesize * 3)) >> 2) - 1;
for (i = loop_size; i >= 0; i--) {
WORD32 win_op;
WORD16 win_val;
win_val = *p_win++;
win_op = ixheaacd_mult32x16in32(*ptr_z++, (win_val));
*p_out2++ = ixheaacd_shl32(win_op, q_shift);
win_val = *p_win++;
win_op = ixheaacd_mult32x16in32(*ptr_z++, (win_val));
*p_out2++ = ixheaacd_shl32(win_op, q_shift);
win_val = *p_win++;
win_op = ixheaacd_mult32x16in32(*ptr_z++, (win_val));
*p_out2++ = ixheaacd_shl32(win_op, q_shift);
win_val = *p_win++;
win_op = ixheaacd_mult32x16in32(*ptr_z++, (win_val));
*p_out2++ = ixheaacd_shl32(win_op, q_shift);
}
} else {
q_shift = -q_shift;
for (i = (delay)-1; i >= 0; i--) {
WORD32 win_op;
WORD32 win_ovadd_op;
WORD16 win_val;
win_val = *p_win++;
win_op = ixheaacd_mult32x16in32(*ptr_z++, (win_val));
win_ovadd_op =
ixheaacd_add32_sat(ixheaacd_shr32(win_op, q_shift), *ptr_out++);
*out_samples = ixheaacd_round16(ixheaacd_shl32(win_ovadd_op, 1));
out_samples += stride;
win_val = *p_win++;
win_op = ixheaacd_mult32x16in32(*ptr_z++, (win_val));
win_ovadd_op =
ixheaacd_add32_sat(ixheaacd_shr32(win_op, q_shift), *ptr_out++);
*out_samples = ixheaacd_round16(ixheaacd_shl32(win_ovadd_op, 1));
out_samples += stride;
win_val = *p_win++;
win_op = ixheaacd_mult32x16in32(*ptr_z++, (win_val));
win_ovadd_op =
ixheaacd_add32_sat(ixheaacd_shr32(win_op, q_shift), *ptr_out++);
*out_samples = ixheaacd_round16(ixheaacd_shl32(win_ovadd_op, 1));
out_samples += stride;
win_val = *p_win++;
win_op = ixheaacd_mult32x16in32(*ptr_z++, (win_val));
win_ovadd_op =
ixheaacd_add32_sat(ixheaacd_shr32(win_op, q_shift), *ptr_out++);
*out_samples = ixheaacd_round16(ixheaacd_shl32(win_ovadd_op, 1));
out_samples += stride;
}
p_out2 = p_overlap_buffer32;
loop_size = (((framesize * 3) - framesize) >> 2) - 1;
for (i = loop_size; i >= 0; i--) {
WORD32 win_op;
WORD16 win_val;
win_val = *p_win++;
win_op = ixheaacd_mult32x16in32(*ptr_z++, (win_val));
*p_out2++ =
ixheaacd_add32_sat(ixheaacd_shr32(win_op, q_shift), *ptr_out++);
win_val = *p_win++;
win_op = ixheaacd_mult32x16in32(*ptr_z++, (win_val));
*p_out2++ =
ixheaacd_add32_sat(ixheaacd_shr32(win_op, q_shift), *ptr_out++);
win_val = *p_win++;
win_op = ixheaacd_mult32x16in32(*ptr_z++, (win_val));
*p_out2++ =
ixheaacd_add32_sat(ixheaacd_shr32(win_op, q_shift), *ptr_out++);
win_val = *p_win++;
win_op = ixheaacd_mult32x16in32(*ptr_z++, (win_val));
*p_out2++ =
ixheaacd_add32_sat(ixheaacd_shr32(win_op, q_shift), *ptr_out++);
}
loop_size = ((((framesize << 2) - delay) - (framesize * 3)) >> 2) - 1;
for (i = loop_size; i >= 0; i--) {
WORD32 win_op;
WORD16 win_val;
win_val = *p_win++;
win_op = ixheaacd_mult32x16in32(*ptr_z++, (win_val));
*p_out2++ = ixheaacd_shr32(win_op, q_shift);
win_val = *p_win++;
win_op = ixheaacd_mult32x16in32(*ptr_z++, (win_val));
*p_out2++ = ixheaacd_shr32(win_op, q_shift);
win_val = *p_win++;
win_op = ixheaacd_mult32x16in32(*ptr_z++, (win_val));
*p_out2++ = ixheaacd_shr32(win_op, q_shift);
win_val = *p_win++;
win_op = ixheaacd_mult32x16in32(*ptr_z++, (win_val));
*p_out2++ = ixheaacd_shr32(win_op, q_shift);
}
}
}
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