/******************************************************************************
* *
* 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 "ixheaacd_sbr_common.h"
#include <ixheaacd_type_def.h>
#include "string.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_error_codes.h"
#include "ixheaacd_defines.h"
#include <ixheaacd_aac_rom.h>
#include "ixheaacd_common_rom.h"
#include "ixheaacd_basic_funcs.h"
#include "ixheaacd_aac_imdct.h"
#include <ixheaacd_basic_op.h>
#include "ixheaacd_intrinsics.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_audioobjtypes.h"
#include "ixheaacd_latmdemux.h"
#include "ixheaacd_aacdec.h"
#include "ixheaacd_tns.h"
#include "ixheaacd_function_selector.h"
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
static PLATFORM_INLINE WORD16 ixheaacd_is_correlation(
ia_aac_dec_channel_info_struct *ptr_aac_dec_channel_info, WORD16 pns_band) {
ia_pns_correlation_info_struct *ptr_corr_info =
ptr_aac_dec_channel_info->pstr_pns_corr_info;
return ((ptr_corr_info->correlated[(pns_band >> PNS_BAND_FLAGS_SHIFT)] >>
(pns_band & PNS_BAND_FLAGS_MASK)) &
1);
}
VOID ixheaacd_gen_rand_vec(WORD32 scale, WORD shift, WORD32 *ptr_spec_coef,
WORD32 sfb_width, WORD32 *seed) {
WORD nrg_scale;
WORD32 nrg = 0;
WORD32 *spec = ptr_spec_coef;
WORD32 sfb;
for (sfb = 0; sfb <= sfb_width; sfb++) {
*seed = (WORD32)(((WORD64)1664525 * (WORD64)(*seed)) + (WORD64)1013904223);
*spec = (*seed >> 3);
nrg = ixheaacd_add32_sat(nrg, ixheaacd_mult32_shl_sat(*spec, *spec));
spec++;
}
nrg_scale = ixheaacd_norm32(nrg);
if (nrg_scale > 0) {
nrg_scale &= ~1;
nrg = ixheaacd_shl32_sat(nrg, nrg_scale);
shift = shift - (nrg_scale >> 1);
}
nrg = ixheaacd_sqrt(nrg);
scale = ixheaacd_div32_pos_normb(scale, nrg);
spec = ptr_spec_coef;
for (sfb = 0; sfb <= sfb_width; sfb++) {
*spec = ixheaacd_shr32_dir_sat_limit(ixheaacd_mult32_shl_sat(*spec, scale),
shift);
spec++;
}
}
VOID ixheaacd_pns_process(
ia_aac_dec_channel_info_struct *ptr_aac_dec_channel_info[], WORD32 channel,
ia_aac_dec_tables_struct *ptr_aac_tables) {
ia_pns_info_struct *ptr_pns_info =
&ptr_aac_dec_channel_info[channel]->str_pns_info;
ia_ics_info_struct *ptr_ics_info =
&ptr_aac_dec_channel_info[channel]->str_ics_info;
WORD32 *ptr_scale_mant_tab =
ptr_aac_tables->pstr_block_tables->scale_mant_tab;
if (ptr_pns_info->pns_active) {
const WORD16 *swb_offset =
ptr_aac_tables->str_aac_sfb_info[ptr_ics_info->window_sequence]
.sfb_index;
WORD num_win_group, grp_len, sfb;
WORD32 *spec = &ptr_aac_dec_channel_info[channel]->ptr_spec_coeff[0];
for (num_win_group = 0; num_win_group < ptr_ics_info->num_window_groups;
num_win_group++) {
grp_len = ptr_ics_info->window_group_length[num_win_group];
for (grp_len = 0;
grp_len < ptr_ics_info->window_group_length[num_win_group];
grp_len++) {
for (sfb = 0; sfb < ptr_ics_info->max_sfb; sfb++) {
WORD16 pns_band = ((num_win_group << 4) + sfb);
if (ptr_aac_dec_channel_info[channel]
->str_pns_info.pns_used[pns_band]) {
WORD32 scale_mant;
WORD32 scale_exp;
WORD32 sfb_width = swb_offset[sfb + 1] - swb_offset[sfb] - 1;
WORD32 *ptr_spec = &spec[swb_offset[sfb]];
scale_mant = ptr_scale_mant_tab[ptr_aac_dec_channel_info[channel]
->ptr_scale_factor[pns_band] &
PNS_SCALE_MANT_TAB_MASK];
scale_exp = add_d(sub_d(31, (ptr_aac_dec_channel_info[channel]
->ptr_scale_factor[pns_band] >>
PNS_SCALEFACTOR_SCALING)),
PNS_SCALE_MANT_TAB_SCALING);
if (ixheaacd_is_correlation(ptr_aac_dec_channel_info[LEFT],
pns_band)) {
if (channel == 0) {
ptr_aac_dec_channel_info[LEFT]
->pstr_pns_corr_info->random_vector[pns_band] =
ptr_aac_dec_channel_info[LEFT]
->pstr_pns_rand_vec_data->current_seed;
ixheaacd_gen_rand_vec(
scale_mant, scale_exp, ptr_spec, sfb_width,
&(ptr_aac_dec_channel_info[LEFT]
->pstr_pns_rand_vec_data->current_seed));
}
else {
ixheaacd_gen_rand_vec(
scale_mant, scale_exp, ptr_spec, sfb_width,
&(ptr_aac_dec_channel_info[LEFT]
->pstr_pns_corr_info->random_vector[pns_band]));
}
}
else {
ixheaacd_gen_rand_vec(
scale_mant, scale_exp, ptr_spec, sfb_width,
&(ptr_aac_dec_channel_info[LEFT]
->pstr_pns_rand_vec_data->current_seed));
}
}
}
spec += 128;
}
}
}
if (channel == 0) {
ptr_aac_dec_channel_info[0]->pstr_pns_rand_vec_data->pns_frame_number++;
}
}
VOID ixheaacd_tns_decode_coef(const ia_filter_info_struct *filter,
WORD16 *parcor_coef,
ia_aac_dec_tables_struct *ptr_aac_tables) {
WORD order, resolution;
WORD16 *ptr_par_coef = parcor_coef;
WORD16 *tns_coeff_ptr;
WORD8 ixheaacd_drc_offset = 4;
WORD8 *ptr_coef = (WORD8 *)filter->coef;
resolution = filter->resolution;
tns_coeff_ptr = ptr_aac_tables->pstr_block_tables->tns_coeff3_16;
if (resolution) {
tns_coeff_ptr = ptr_aac_tables->pstr_block_tables->tns_coeff4_16;
ixheaacd_drc_offset = ixheaacd_drc_offset << 1;
}
for (order = 0; order < filter->order; order++) {
WORD8 temp = *ptr_coef++;
*ptr_par_coef++ = tns_coeff_ptr[temp + ixheaacd_drc_offset];
}
}
VOID ixheaacd_tns_decode_coef_ld(const ia_filter_info_struct *filter,
WORD32 *parcor_coef,
ia_aac_dec_tables_struct *ptr_aac_tables) {
WORD order, resolution;
WORD32 *ptr_par_coef = parcor_coef;
WORD32 *tns_coeff_ptr;
WORD8 offset = 4;
WORD8 *ptr_coef = (WORD8 *)filter->coef;
resolution = filter->resolution;
tns_coeff_ptr = ptr_aac_tables->pstr_block_tables->tns_coeff3;
if (resolution) {
tns_coeff_ptr = ptr_aac_tables->pstr_block_tables->tns_coeff4;
offset = offset << 1;
}
for (order = 0; order < filter->order; order++) {
WORD8 temp = *ptr_coef++;
*ptr_par_coef++ = tns_coeff_ptr[temp + offset];
}
}
VOID ixheaacd_aac_tns_process(
ia_aac_dec_channel_info_struct *ptr_aac_dec_channel_info, WORD32 num_ch,
ia_aac_dec_tables_struct *ptr_aac_tables, WORD32 object_type,
WORD32 ar_flag, WORD32 *predicted_spectrum) {
WORD i;
WORD16 scale_lpc;
ia_tns_info_aac_struct *ptr_tns_info =
&ptr_aac_dec_channel_info->str_tns_info;
WORD32 *spec = ptr_aac_dec_channel_info->ptr_spec_coeff;
WORD32 *scratch_buf = ptr_aac_dec_channel_info->scratch_buf_ptr;
WORD win, filt, start, stop, size, scale_spec;
ia_ics_info_struct *ptr_ics_info = &ptr_aac_dec_channel_info->str_ics_info;
WORD num_window, tns_max_bands, win_seq;
WORD position;
WORD32 parcor_coef[MAX_ORDER + 1];
WORD16 parcor_coef_16[MAX_ORDER + 1];
WORD32 lpc_coef[MAX_ORDER + 1];
WORD16 lpc_coef_16[MAX_ORDER + 1];
const WORD16 *ptr_sfb_table;
win_seq = ptr_ics_info->window_sequence == 0
? 0
: (ptr_ics_info->window_sequence % 2 == 0);
if (ar_flag)
spec = ptr_aac_dec_channel_info->ptr_spec_coeff;
else {
spec = predicted_spectrum;
}
if (object_type == AOT_ER_AAC_ELD || object_type == AOT_ER_AAC_LD ||
object_type == AOT_AAC_LTP) {
if (512 == ptr_ics_info->frame_length) {
tns_max_bands =
ptr_aac_tables->pstr_block_tables
->tns_max_bands_tbl_ld[ptr_ics_info->sampling_rate_index];
win_seq = 1;
num_window = win_seq;
} else if (480 == ptr_ics_info->frame_length) {
tns_max_bands =
ptr_aac_tables->pstr_block_tables
->tns_max_bands_tbl_480[ptr_ics_info->sampling_rate_index];
win_seq = 1;
num_window = win_seq;
} else {
tns_max_bands =
ptr_aac_tables->pstr_block_tables
->tns_max_bands_tbl[ptr_ics_info->sampling_rate_index][win_seq];
num_window = win_seq ? 8 : 1;
}
} else {
tns_max_bands =
ptr_aac_tables->pstr_block_tables
->tns_max_bands_tbl[ptr_ics_info->sampling_rate_index][win_seq];
num_window = win_seq ? 8 : 1;
}
ptr_sfb_table =
ptr_aac_tables->str_aac_sfb_info[ptr_ics_info->window_sequence].sfb_index;
for (win = 0; win < num_window; win++) {
WORD n_filt = ptr_tns_info->n_filt[win];
for (filt = 0; filt < n_filt; filt++) {
ia_filter_info_struct *filter = &ptr_tns_info->str_filter[win][filt];
if (filter->order <= 0) {
continue;
}
if ((object_type == AOT_ER_AAC_LD) || (object_type == AOT_AAC_LTP) ||
(num_ch > 2)) {
ixheaacd_tns_decode_coefficients(filter, parcor_coef, ptr_aac_tables);
} else {
ixheaacd_tns_decode_coef(filter, parcor_coef_16, ptr_aac_tables);
}
start = ixheaacd_min32(ixheaacd_min32(filter->start_band, tns_max_bands),
ptr_ics_info->max_sfb);
start = ptr_sfb_table[start];
stop = ixheaacd_min32(ixheaacd_min32(filter->stop_band, tns_max_bands),
ptr_ics_info->max_sfb);
stop = ptr_sfb_table[stop];
size = (stop - start);
if (size <= 0) {
continue;
}
if ((object_type == AOT_ER_AAC_LD) || (object_type == AOT_AAC_LTP) ||
(num_ch > 2)) {
ixheaacd_tns_parcor_to_lpc(parcor_coef, lpc_coef, &scale_lpc,
filter->order);
} else {
(*ixheaacd_tns_parcor_lpc_convert)(parcor_coef_16, lpc_coef_16,
&scale_lpc, filter->order);
}
{
WORD32 *ptr_tmp = spec + (win << 7) + start;
scale_spec = (*ixheaacd_calc_max_spectral_line)(ptr_tmp, size);
}
if (filter->direction == -1) {
position = stop - 1;
} else {
position = start;
}
if ((num_ch <= 2) &&
((object_type != AOT_ER_AAC_LD) && (object_type != AOT_AAC_LTP)))
scale_spec = ((scale_spec - 4) - scale_lpc);
else {
if (scale_spec > 17)
scale_spec = ((scale_spec - 6) - scale_lpc);
else if (scale_spec > 11)
scale_spec = ((scale_spec - 5) - scale_lpc);
else
scale_spec = ((scale_spec - 4) - scale_lpc);
}
if (scale_spec > 0) {
scale_spec = ixheaacd_min32(scale_spec, 31);
if ((object_type == AOT_ER_AAC_LD) || (object_type == AOT_AAC_LTP) ||
(num_ch > 2)) {
if (ar_flag)
(*ixheaacd_tns_ar_filter_fixed)(&spec[(win << 7) + position], size,
filter->direction,
(WORD32 *)lpc_coef, filter->order,
(WORD32)scale_lpc, scale_spec);
else
ixheaacd_tns_ma_filter_fixed_ld(&spec[(win << 7) + position], size,
filter->direction, lpc_coef,
filter->order, scale_lpc);
} else {
if (object_type == AOT_ER_AAC_ELD) scale_spec = scale_spec - 1;
(*ixheaacd_tns_ar_filter)(&spec[(win << 7) + position], size,
filter->direction, lpc_coef_16,
filter->order, (WORD32)scale_lpc,
scale_spec, scratch_buf);
}
}
else {
WORD32 *ptr_tmp = spec + (win << 7) + start;
scale_spec = -scale_spec;
scale_spec = ixheaacd_min32(scale_spec, 31);
for (i = size; i != 0; i--) {
*ptr_tmp = (*ptr_tmp >> scale_spec);
ptr_tmp++;
}
if ((object_type == AOT_ER_AAC_LD) || (object_type == AOT_AAC_LTP) ||
num_ch > 2) {
if (ar_flag)
(*ixheaacd_tns_ar_filter_fixed)(
&spec[(win << 7) + position], size, filter->direction,
(WORD32 *)lpc_coef, filter->order, scale_lpc, 0);
else
ixheaacd_tns_ma_filter_fixed_ld(&spec[(win << 7) + position], size,
filter->direction, lpc_coef,
filter->order, scale_lpc);
} else {
if (object_type == AOT_ER_AAC_ELD) {
scale_lpc = scale_lpc - 1;
}
(*ixheaacd_tns_ar_filter)(&spec[(win << 7) + position], size,
filter->direction, lpc_coef_16,
filter->order, scale_lpc, 0, scratch_buf);
}
ptr_tmp = spec + (win << 7) + start;
for (i = size; i != 0; i--) {
*ptr_tmp = (*ptr_tmp << scale_spec);
ptr_tmp++;
}
}
}
}
}