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android13/external/libxaac/decoder/ixheaacd_sbrdec_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 <math.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_defines.h"
#include "ixheaacd_intrinsics.h"
#include "ixheaacd_sbr_const.h"
#include "ixheaacd_basic_op.h"
#include "ixheaacd_defines.h"
#include "ixheaacd_bitbuffer.h"
#include "ixheaacd_pns.h"
#include "ixheaacd_aac_rom.h"
#include "ixheaacd_pulsedata.h"
#include "ixheaacd_drc_data_struct.h"
#include "ixheaacd_lt_predict.h"
#include "ixheaacd_channelinfo.h"
#include "ixheaacd_drc_dec.h"
#include "ixheaacd_sbrdecoder.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_ps_bitdec.h"
#include "ixheaacd_env_extr.h"
#include "ixheaacd_common_rom.h"
#include "ixheaacd_freq_sca.h"
#include "ixheaacd_qmf_dec.h"
#include "ixheaacd_env_calc.h"
#include "ixheaacd_pvc_dec.h"
#include "ixheaacd_sbr_dec.h"
#include "ixheaacd_env_dec.h"
#include "ixheaacd_basic_funcs.h"
#include "ixheaacd_sbr_crc.h"
#include "ixheaacd_function_selector.h"
#include "ixheaacd_audioobjtypes.h"
#define ALIGN_SIZE64(x) ((((x) + 7) >> 3) << 3)
static const FLOAT32 ixheaacd_new_bw_table[4][4] = {
{0.00f, 0.60f, 0.90f, 0.98f},
{0.60f, 0.75f, 0.90f, 0.98f},
{0.00f, 0.75f, 0.90f, 0.98f},
{0.00f, 0.75f, 0.90f, 0.98f}};
static const WORD32 ixheaacd_inew_bw_table[4][4] = {
{0x00000000, 0x4ccccccd, 0x73333333, 0x7d70a3d7},
{0x4ccccccd, 0x60000000, 0x73333333, 0x7d70a3d7},
{0x00000000, 0x60000000, 0x73333333, 0x7d70a3d7},
{0x00000000, 0x60000000, 0x73333333, 0x7d70a3d7}};
VOID ixheaacd_reset_sbrenvelope_calc(ia_sbr_calc_env_struct *h_cal_env) {
h_cal_env->ph_index = 0;
h_cal_env->filt_buf_noise_e = 0;
h_cal_env->start_up = 1;
}
VOID ixheaacd_derive_lim_band_tbl(
ia_sbr_header_data_struct *ptr_header_data,
const ia_patch_param_struct *p_str_patch_param, WORD16 num_patches,
ixheaacd_misc_tables *pstr_common_tables) {
WORD32 i, k, k_1;
WORD32 nr_lim, patch_border_k, patch_border_k_1, temp_nr_lim;
WORD16 lim_table[MAX_FREQ_COEFFS / 2 + MAX_NUM_PATCHES + 1];
WORD16 patch_borders[MAX_NUM_PATCHES + 1];
WORD16 kx, k2;
WORD16 temp, lim_bands, num_octaves;
WORD16 *f_lim_tbl = ptr_header_data->pstr_freq_band_data->freq_band_tbl_lim;
WORD16 *num_lf_bands = &ptr_header_data->pstr_freq_band_data->num_lf_bands;
WORD16 *f_low_tbl =
ptr_header_data->pstr_freq_band_data->freq_band_table[LOW];
WORD16 num_low_bnd = ptr_header_data->pstr_freq_band_data->num_sf_bands[LOW];
WORD16 limiter_bands = ptr_header_data->limiter_bands;
WORD16 sub_band_start = f_low_tbl[0];
WORD16 sub_band_end = f_low_tbl[num_low_bnd];
static const WORD16 limbnd_per_oct[4] = {(WORD16)0x2000, (WORD16)0x2666,
(WORD16)0x4000, (WORD16)0x6000};
if (limiter_bands == 0) {
f_lim_tbl[0] = 0;
f_lim_tbl[1] = sub_band_end - sub_band_start;
nr_lim = 1;
} else {
for (k = 0; k < num_patches; k++) {
patch_borders[k] = p_str_patch_param[k].guard_start_band - sub_band_start;
}
patch_borders[k] = sub_band_end - sub_band_start;
for (k = 0; k <= num_low_bnd; k++) {
lim_table[k] = f_low_tbl[k] - sub_band_start;
}
for (k = 1; k < num_patches; k++) {
lim_table[num_low_bnd + k] = patch_borders[k];
}
temp_nr_lim = nr_lim = (num_low_bnd + num_patches) - 1;
ixheaacd_aac_shellsort(lim_table, (temp_nr_lim + 1));
k = 1;
k_1 = 0;
lim_bands = limbnd_per_oct[limiter_bands];
while ((k - temp_nr_lim) <= 0) {
k2 = lim_table[k] + sub_band_start;
kx = lim_table[k_1] + sub_band_start;
num_octaves = pstr_common_tables->log_dual_is_table[k2];
num_octaves -= pstr_common_tables->log_dual_is_table[kx];
temp = (WORD16)(((WORD32)lim_bands * (WORD32)num_octaves) >> 15);
if (temp < 0x01f6) {
if (lim_table[k_1] == lim_table[k]) {
lim_table[k] = sub_band_end;
nr_lim = nr_lim - 1;
k = (k + 1);
continue;
}
patch_border_k_1 = patch_border_k = 0;
for (i = 0; i <= num_patches; i++) {
if (lim_table[k] == patch_borders[i]) {
patch_border_k = 1;
}
if (lim_table[k_1] == patch_borders[i]) {
patch_border_k_1 = 1;
}
}
if (!patch_border_k) {
lim_table[k] = sub_band_end;
nr_lim = nr_lim - 1;
k = (k + 1);
continue;
}
if (!patch_border_k_1) {
lim_table[k_1] = sub_band_end;
nr_lim = nr_lim - 1;
}
}
k_1 = k;
k = (k + 1);
}
ixheaacd_aac_shellsort(lim_table, (temp_nr_lim + 1));
memcpy(f_lim_tbl, lim_table, sizeof(WORD16) * (nr_lim + 1));
}
*num_lf_bands = nr_lim;
return;
}
VOID ixheaacd_lean_sbrconcealment(
ia_sbr_header_data_struct *ptr_header_data,
ia_sbr_frame_info_data_struct *ptr_sbr_data,
ia_sbr_prev_frame_data_struct *ptr_prev_data) {
WORD32 target;
WORD32 step;
WORD32 i;
WORD16 cur_start_pos;
WORD16 cur_stop_pos;
ptr_sbr_data->amp_res = ptr_prev_data->amp_res;
ptr_sbr_data->coupling_mode = ptr_prev_data->coupling_mode;
ptr_sbr_data->max_qmf_subband_aac = ptr_prev_data->max_qmf_subband_aac;
memcpy(ptr_sbr_data->sbr_invf_mode, ptr_prev_data->sbr_invf_mode,
sizeof(WORD32) * MAX_INVF_BANDS);
ptr_sbr_data->str_frame_info_details.num_env = 1;
cur_start_pos = ptr_prev_data->end_position - ptr_header_data->num_time_slots;
cur_stop_pos = ptr_header_data->num_time_slots;
ptr_sbr_data->str_frame_info_details.border_vec[0] = cur_start_pos;
ptr_sbr_data->str_frame_info_details.border_vec[1] = cur_stop_pos;
ptr_sbr_data->str_frame_info_details.noise_border_vec[0] = cur_start_pos;
ptr_sbr_data->str_frame_info_details.noise_border_vec[1] = cur_stop_pos;
;
ptr_sbr_data->str_frame_info_details.freq_res[0] = 1;
ptr_sbr_data->str_frame_info_details.transient_env = -1;
ptr_sbr_data->str_frame_info_details.num_noise_env = 1;
ptr_sbr_data->num_env_sfac =
ptr_header_data->pstr_freq_band_data->num_sf_bands[1];
ptr_sbr_data->del_cod_dir_arr[0] = DTDF_DIR_TIME;
if (ptr_sbr_data->coupling_mode == COUPLING_BAL) {
target = SBR_ENERGY_PAN_OFFSET;
} else {
target = 0;
}
step = 1;
if (ptr_sbr_data->amp_res - SBR_AMPLITUDE_RESOLUTION_1_5 == 0) {
target = (target << 1);
step = (step << 1);
}
for (i = 0; i < ptr_sbr_data->num_env_sfac; i++) {
if (ptr_prev_data->sfb_nrg_prev[i] > target)
ptr_sbr_data->int_env_sf_arr[i] = -(step);
else
ptr_sbr_data->int_env_sf_arr[i] = step;
}
ptr_sbr_data->del_cod_dir_noise_arr[0] = DTDF_DIR_TIME;
memset(ptr_sbr_data->int_noise_floor, 0,
sizeof(WORD16) * ptr_header_data->pstr_freq_band_data->num_nf_bands);
memset(ptr_sbr_data->add_harmonics, 0, sizeof(FLAG) * MAX_FREQ_COEFFS);
}
static WORD16 ixheaacd_find_closest_entry(WORD32 goal_sb, WORD16 *f_master_tbl,
WORD16 num_mf_bands,
WORD16 direction) {
WORD32 index;
if (goal_sb <= f_master_tbl[0]) return f_master_tbl[0];
if (goal_sb >= f_master_tbl[num_mf_bands]) return f_master_tbl[num_mf_bands];
if (direction) {
index = 0;
while (f_master_tbl[index] < goal_sb) {
index++;
}
} else {
index = num_mf_bands;
while (f_master_tbl[index] > goal_sb) {
index--;
}
}
return f_master_tbl[index];
}
WORD32 ixheaacd_reset_hf_generator(ia_sbr_hf_generator_struct *ptr_hf_gen_str,
ia_sbr_header_data_struct *ptr_header_data,
WORD audio_object_type) {
WORD32 patch, sb;
WORD32 temp;
WORD16 *ptr_noise_freq_tbl;
WORD32 num_nf_bands;
ia_transposer_settings_struct *pstr_transposer_settings =
ptr_hf_gen_str->pstr_settings;
ia_patch_param_struct *p_str_patch_param =
pstr_transposer_settings->str_patch_param;
WORD32 sub_band_start = ptr_header_data->pstr_freq_band_data->sub_band_start;
WORD16 *f_master_tbl = ptr_header_data->pstr_freq_band_data->f_master_tbl;
WORD16 num_mf_bands = ptr_header_data->pstr_freq_band_data->num_mf_bands;
WORD16 usb = ptr_header_data->pstr_freq_band_data->sub_band_end;
WORD32 src_start_band;
WORD32 patch_stride;
WORD32 num_bands_in_patch;
WORD32 lsb = f_master_tbl[0];
WORD16 xover_offset = sub_band_start - lsb;
WORD16 goal_sb;
WORD32 fs = ptr_header_data->out_sampling_freq;
if (lsb < (SHIFT_START_SB + 4)) {
return (1);
}
switch (fs) {
case 16000:
case 22050:
case 24000:
case 32000:
goal_sb = 64;
break;
case 44100:
goal_sb = 46;
break;
case 48000:
goal_sb = 43;
break;
case 64000:
goal_sb = 32;
break;
case 88200:
goal_sb = 23;
break;
case 96000:
goal_sb = 21;
break;
default:
return (0);
}
goal_sb = ixheaacd_find_closest_entry(goal_sb, f_master_tbl, num_mf_bands, 1);
if (audio_object_type != AOT_ER_AAC_ELD &&
audio_object_type != AOT_ER_AAC_LD) {
if (ixheaacd_abs16_sat((WORD16)(goal_sb - usb)) < 4) {
goal_sb = usb;
}
}
src_start_band = SHIFT_START_SB + xover_offset;
sb = (lsb + xover_offset);
patch = 0;
if ((goal_sb < sb) && (lsb > src_start_band)) {
return -1;
}
while (((sb - usb) < 0) && (patch < MAX_NUM_PATCHES)) {
ia_patch_param_struct *ptr_loc_patch_param = &p_str_patch_param[patch];
WORD16 abs_sb, flag_break = 0;
ptr_loc_patch_param->guard_start_band = sb;
sb = (sb + GUARDBANDS);
ptr_loc_patch_param->dst_start_band = sb;
num_bands_in_patch = (goal_sb - sb);
if ((num_bands_in_patch <= 0) &&
((num_bands_in_patch - (lsb - src_start_band)) < 0)) {
flag_break = 1;
}
if ((num_bands_in_patch - (lsb - src_start_band)) >= 0) {
patch_stride = sb - src_start_band;
patch_stride = (WORD16)(patch_stride & ~1);
num_bands_in_patch = (lsb - (sb - patch_stride));
num_bands_in_patch = ixheaacd_find_closest_entry(
sb + num_bands_in_patch, f_master_tbl, num_mf_bands, 0);
num_bands_in_patch -= sb;
}
patch_stride = ((num_bands_in_patch + sb) - lsb);
patch_stride = (WORD16)((patch_stride + 1) & ~1);
if (num_bands_in_patch > 0) {
ptr_loc_patch_param->src_start_band = (sb - patch_stride);
ptr_loc_patch_param->dst_end_band = patch_stride;
ptr_loc_patch_param->num_bands_in_patch = num_bands_in_patch;
ptr_loc_patch_param->src_end_band =
(ptr_loc_patch_param->src_start_band + num_bands_in_patch);
sb = (sb + ptr_loc_patch_param->num_bands_in_patch);
patch++;
}
src_start_band = SHIFT_START_SB;
abs_sb = ixheaacd_abs16_sat((WORD16)((sb - goal_sb))) - 3;
if (abs_sb < 0) {
goal_sb = usb;
} else {
if (flag_break == 1) break;
}
}
patch--;
if ((patch > 0) && (p_str_patch_param[patch].num_bands_in_patch < 3)) {
patch--;
sb = p_str_patch_param[patch].dst_start_band +
p_str_patch_param[patch].num_bands_in_patch;
}
if (patch >= MAX_NUM_PATCHES) {
return -1;
}
pstr_transposer_settings->num_patches = patch + 1;
temp = 0;
for (patch = 0; patch < pstr_transposer_settings->num_patches; patch++) {
sb = ixheaacd_min32(sb, p_str_patch_param[patch].src_start_band);
temp = ixheaacd_max32(temp, p_str_patch_param[patch].src_end_band);
}
if (sb > temp) return IA_FATAL_ERROR;
pstr_transposer_settings->start_patch = sb;
pstr_transposer_settings->stop_patch = temp;
ptr_noise_freq_tbl =
ptr_header_data->pstr_freq_band_data->freq_band_tbl_noise;
num_nf_bands = ptr_header_data->pstr_freq_band_data->num_nf_bands;
memcpy(&pstr_transposer_settings->bw_borders[0], &ptr_noise_freq_tbl[1],
sizeof(WORD16) * num_nf_bands);
memset(ptr_hf_gen_str->bw_array_prev, 0, sizeof(WORD32) * MAX_NUM_PATCHES);
return 0;
}
VOID ixheaacd_rescale_x_overlap(
ia_sbr_dec_struct *ptr_sbr_dec, ia_sbr_header_data_struct *ptr_header_data,
ia_sbr_frame_info_data_struct *ptr_frame_data,
ia_sbr_prev_frame_data_struct *ptr_frame_data_prev,
WORD32 **pp_overlap_buffer_real, WORD32 **pp_overlap_buffer_imag,
FLAG low_pow_flag) {
WORD32 k, l;
WORD32 start_band, end_band;
WORD32 target_lsb, target_usb;
WORD32 source_scale, target_scale, delta_scale, reserve;
WORD32 old_lsb = ptr_frame_data_prev->max_qmf_subband_aac;
WORD32 start_slot =
(ptr_header_data->time_step *
(ptr_frame_data_prev->end_position - ptr_header_data->num_time_slots));
WORD32 new_lsb = ptr_frame_data->max_qmf_subband_aac;
ptr_sbr_dec->str_codec_qmf_bank.usb = new_lsb;
ptr_sbr_dec->str_synthesis_qmf_bank.lsb = new_lsb;
start_band = ixheaacd_min32(old_lsb, new_lsb);
end_band = ixheaacd_max32(old_lsb, new_lsb);
if (new_lsb != old_lsb && old_lsb > 0) {
for (l = start_slot; l < 6; l++) {
for (k = old_lsb; k < new_lsb; k++) {
pp_overlap_buffer_real[l][k] = 0L;
if (!low_pow_flag) {
pp_overlap_buffer_imag[l][k] = 0L;
}
}
}
if (new_lsb > old_lsb) {
source_scale = ptr_sbr_dec->str_sbr_scale_fact.ov_hb_scale;
target_scale = ptr_sbr_dec->str_sbr_scale_fact.ov_lb_scale;
target_lsb = 0;
target_usb = old_lsb;
} else {
source_scale = ptr_sbr_dec->str_sbr_scale_fact.ov_lb_scale;
target_scale = ptr_sbr_dec->str_sbr_scale_fact.ov_hb_scale;
target_lsb = old_lsb;
target_usb = ptr_sbr_dec->str_synthesis_qmf_bank.usb;
}
reserve = (*ixheaacd_ixheaacd_expsubbandsamples)(
pp_overlap_buffer_real, pp_overlap_buffer_imag, start_band, end_band, 0,
start_slot, low_pow_flag);
(*ixheaacd_adjust_scale)(pp_overlap_buffer_real, pp_overlap_buffer_imag,
start_band, end_band, 0, start_slot, reserve,
low_pow_flag);
source_scale += reserve;
delta_scale = (target_scale - source_scale);
if (delta_scale > 0) {
delta_scale = -(delta_scale);
start_band = target_lsb;
end_band = target_usb;
if (new_lsb > old_lsb) {
ptr_sbr_dec->str_sbr_scale_fact.ov_lb_scale = source_scale;
} else {
ptr_sbr_dec->str_sbr_scale_fact.ov_hb_scale = source_scale;
}
}
(*ixheaacd_adjust_scale)(pp_overlap_buffer_real, pp_overlap_buffer_imag,
start_band, end_band, 0, start_slot, delta_scale,
low_pow_flag);
}
}
VOID ixheaacd_map_sineflags(WORD16 *freq_band_table, WORD16 num_sf_bands,
FLAG *add_harmonics, WORD8 *harm_flags_prev,
WORD16 transient_env, WORD8 *sine_mapped)
{
WORD32 qmfband2, li, ui, i;
WORD32 low_subband_sec;
WORD32 oldflags;
low_subband_sec = (freq_band_table[0] << 1);
memset(sine_mapped, MAX_ENVELOPES, sizeof(WORD8) * MAX_FREQ_COEFFS);
for (i = (num_sf_bands - 1); i >= 0; i--) {
oldflags = *harm_flags_prev;
*harm_flags_prev++ = add_harmonics[i];
if (add_harmonics[i]) {
li = freq_band_table[i];
ui = freq_band_table[i + 1];
qmfband2 = ((ui + li) - low_subband_sec) >> 1;
if (oldflags)
sine_mapped[qmfband2] = 0;
else
sine_mapped[qmfband2] = (WORD8)transient_env;
}
}
}
VOID ixheaacd_map_34_params_to_20(WORD16 *params) {
params[0] = ixheaacd_divideby3(params[0] + params[0] + params[1]);
params[1] = ixheaacd_divideby3(params[1] + params[2] + params[2]);
params[2] = ixheaacd_divideby3(params[3] + params[3] + params[4]);
params[3] = ixheaacd_divideby3(params[4] + params[5] + params[5]);
params[4] = ixheaacd_divideby2(params[6] + params[7]);
params[5] = ixheaacd_divideby2(params[8] + params[9]);
params[6] = params[10];
params[7] = params[11];
params[8] = ixheaacd_divideby2(params[12] + params[13]);
params[9] = ixheaacd_divideby2(params[14] + params[15]);
params[10] = params[16];
params[11] = params[17];
params[12] = params[18];
params[13] = params[19];
params[14] = ixheaacd_divideby2(params[20] + params[21]);
params[15] = ixheaacd_divideby2(params[22] + params[23]);
params[16] = ixheaacd_divideby2(params[24] + params[25]);
params[17] = ixheaacd_divideby2(params[26] + params[27]);
params[18] = ixheaacd_divideby2(
ixheaacd_divideby2(params[28] + params[29] + params[30] + params[31]));
params[19] = ixheaacd_divideby2(params[32] + params[33]);
}
extern const WORD16 ixheaacd_num_bands[3];
WORD16 ixheaacd_read_ps_data(ia_ps_dec_struct *ptr_ps_dec,
ia_bit_buf_struct *it_bit_buff,
WORD16 num_bits_left,
ia_ps_tables_struct *ps_tables_ptr) {
WORD b, e, temp;
const WORD16 num_env_tab[4] = {0, 1, 2, 4};
WORD cnt_bits;
ia_huffman_data_type huffman_table, huffman_df_table, huffman_dt_table;
FLAG enable_ps_header;
if (!ptr_ps_dec) {
return 0;
}
cnt_bits = it_bit_buff->cnt_bits;
enable_ps_header = ixheaacd_read_bits_buf(it_bit_buff, 1);
if (enable_ps_header) {
ptr_ps_dec->enable_iid = ixheaacd_read_bits_buf(it_bit_buff, 1);
if (ptr_ps_dec->enable_iid) {
ptr_ps_dec->iid_mode = ixheaacd_read_bits_buf(it_bit_buff, 3);
}
if (ptr_ps_dec->iid_mode > 2) {
ptr_ps_dec->iid_quant = 1;
ptr_ps_dec->iid_mode -= 3;
} else {
ptr_ps_dec->iid_quant = 0;
}
ptr_ps_dec->enable_icc = ixheaacd_read_bits_buf(it_bit_buff, 1);
if (ptr_ps_dec->enable_icc) {
ptr_ps_dec->icc_mode = ixheaacd_read_bits_buf(it_bit_buff, 3);
}
ptr_ps_dec->enable_ext = ixheaacd_read_bits_buf(it_bit_buff, 1);
if (ptr_ps_dec->icc_mode > 2) {
ptr_ps_dec->icc_mode -= 3;
}
}
if ((ptr_ps_dec->enable_iid && ptr_ps_dec->iid_mode > 2) ||
(ptr_ps_dec->enable_icc && ptr_ps_dec->icc_mode > 2)) {
ptr_ps_dec->ps_data_present = 0;
num_bits_left -= (cnt_bits - it_bit_buff->cnt_bits);
while (num_bits_left > 8) {
ixheaacd_read_bits_buf(it_bit_buff, 8);
num_bits_left -= 8;
}
ixheaacd_read_bits_buf(it_bit_buff, num_bits_left);
return (cnt_bits - it_bit_buff->cnt_bits);
}
ptr_ps_dec->frame_class = (FLAG)ixheaacd_read_bits_buf(it_bit_buff, 1);
temp = ixheaacd_read_bits_buf(it_bit_buff, 2);
if (ptr_ps_dec->frame_class == 0) {
ptr_ps_dec->num_env = num_env_tab[temp];
} else {
ptr_ps_dec->num_env = (((1 + temp) << 8) >> 8);
for (e = 1; e < ptr_ps_dec->num_env + 1; e++) {
ptr_ps_dec->border_position[e] =
(((ixheaacd_read_bits_buf(it_bit_buff, 5) + 1) << 8) >> 8);
}
}
if (ptr_ps_dec->enable_iid) {
if (ptr_ps_dec->iid_quant) {
huffman_df_table = (ia_huffman_data_type)&ps_tables_ptr->huff_iid_df_fine;
huffman_dt_table = (ia_huffman_data_type)&ps_tables_ptr->huff_iid_dt_fine;
} else {
huffman_df_table = (ia_huffman_data_type)&ps_tables_ptr->huff_iid_df;
huffman_dt_table = (ia_huffman_data_type)&ps_tables_ptr->huff_iid_dt;
}
for (e = 0; e < ptr_ps_dec->num_env; e++) {
ptr_ps_dec->iid_dt[e] = (FLAG)ixheaacd_read_bits_buf(it_bit_buff, 1);
if (ptr_ps_dec->iid_dt[e]) {
huffman_table = huffman_dt_table;
} else {
huffman_table = huffman_df_table;
}
for (b = 0; b < ixheaacd_num_bands[ptr_ps_dec->iid_mode]; b++) {
ptr_ps_dec->iid_par_table[e][b] =
ixheaacd_ssc_huff_dec(huffman_table, it_bit_buff);
}
}
}
if (ptr_ps_dec->enable_icc) {
huffman_df_table = (ia_huffman_data_type)&ps_tables_ptr->huff_icc_df;
huffman_dt_table = (ia_huffman_data_type)&ps_tables_ptr->huff_icc_dt;
for (e = 0; e < ptr_ps_dec->num_env; e++) {
ptr_ps_dec->icc_dt[e] = ixheaacd_read_bits_buf(it_bit_buff, 1);
if (ptr_ps_dec->icc_dt[e]) {
huffman_table = huffman_dt_table;
} else {
huffman_table = huffman_df_table;
}
for (b = 0; b < ixheaacd_num_bands[ptr_ps_dec->icc_mode]; b++) {
ptr_ps_dec->icc_par_table[e][b] =
ixheaacd_ssc_huff_dec(huffman_table, it_bit_buff);
}
}
}
if (ptr_ps_dec->enable_ext) {
WORD32 cnt = ixheaacd_read_bits_buf(it_bit_buff, 4);
if (cnt == 15) {
cnt += ixheaacd_read_bits_buf(it_bit_buff, 8);
}
while (cnt--) {
ixheaacd_read_bits_buf(it_bit_buff, 8);
}
}
ptr_ps_dec->ps_data_present = 1;
return (cnt_bits - it_bit_buff->cnt_bits);
}
VOID ixheaacd_invfilt_level_emphasis(ia_sbr_hf_generator_struct *ptr_hf_gen_str,
WORD32 num_if_bands, WORD32 *inv_filt_mode,
WORD32 *inv_filt_mode_prev,
WORD32 *bw_array) {
WORD32 i;
WORD32 accu;
WORD16 w1, w2;
for (i = 0; i < num_if_bands; i++) {
bw_array[i] =
ixheaacd_inew_bw_table[inv_filt_mode_prev[i]][inv_filt_mode[i]];
if (bw_array[i] < ptr_hf_gen_str->bw_array_prev[i]) {
w1 = 0x6000;
w2 = 0x2000;
} else {
w1 = 0x7400;
w2 = 0x0c00;
}
accu = ixheaacd_add32(
ixheaacd_mult32x16in32_shl(bw_array[i], w1),
ixheaacd_mult32x16in32_shl(ptr_hf_gen_str->bw_array_prev[i], w2));
if (accu < 0x02000000) {
accu = 0;
}
if (accu >= 0x7f800000) {
accu = 0x7f800000;
}
bw_array[i] = accu;
}
}
typedef struct {
FLOAT32 phi_0_1_real;
FLOAT32 phi_0_1_imag;
FLOAT32 phi_0_2_real;
FLOAT32 phi_0_2_imag;
FLOAT32 phi_1_1;
FLOAT32 phi_1_2_real;
FLOAT32 phi_1_2_imag;
FLOAT32 phi_2_2;
FLOAT32 det;
} ia_auto_corr_ele_struct;
static VOID ixheaacd_esbr_calc_co_variance(
ia_auto_corr_ele_struct *pstr_auto_corr, FLOAT32 vec_x_real[][64],
FLOAT32 vec_x_imag[][64], WORD32 bd, WORD32 len) {
WORD32 j, jminus1, jminus2;
memset(pstr_auto_corr, 0, sizeof(ia_auto_corr_ele_struct));
for (j = 0; j < len; j++) {
jminus1 = j - 1;
jminus2 = jminus1 - 1;
pstr_auto_corr->phi_0_1_real +=
vec_x_real[j][bd] * vec_x_real[jminus1][bd] +
vec_x_imag[j][bd] * vec_x_imag[jminus1][bd];
pstr_auto_corr->phi_0_1_imag +=
vec_x_imag[j][bd] * vec_x_real[jminus1][bd] -
vec_x_real[j][bd] * vec_x_imag[jminus1][bd];
pstr_auto_corr->phi_0_2_real +=
vec_x_real[j][bd] * vec_x_real[jminus2][bd] +
vec_x_imag[j][bd] * vec_x_imag[jminus2][bd];
pstr_auto_corr->phi_0_2_imag +=
vec_x_imag[j][bd] * vec_x_real[jminus2][bd] -
vec_x_real[j][bd] * vec_x_imag[jminus2][bd];
pstr_auto_corr->phi_1_1 +=
vec_x_real[jminus1][bd] * vec_x_real[jminus1][bd] +
vec_x_imag[jminus1][bd] * vec_x_imag[jminus1][bd];
pstr_auto_corr->phi_1_2_real +=
vec_x_real[jminus1][bd] * vec_x_real[jminus2][bd] +
vec_x_imag[jminus1][bd] * vec_x_imag[jminus2][bd];
pstr_auto_corr->phi_1_2_imag +=
vec_x_imag[jminus1][bd] * vec_x_real[jminus2][bd] -
vec_x_real[jminus1][bd] * vec_x_imag[jminus2][bd];
pstr_auto_corr->phi_2_2 +=
vec_x_real[jminus2][bd] * vec_x_real[jminus2][bd] +
vec_x_imag[jminus2][bd] * vec_x_imag[jminus2][bd];
}
pstr_auto_corr->det =
pstr_auto_corr->phi_1_1 * pstr_auto_corr->phi_2_2 -
(pstr_auto_corr->phi_1_2_real * pstr_auto_corr->phi_1_2_real +
pstr_auto_corr->phi_1_2_imag * pstr_auto_corr->phi_1_2_imag) *
SBR_HF_RELAXATION_PARAM;
}
static void ixheaacd_esbr_chirp_fac_calc(WORD32 *inv_filt_mode,
WORD32 *inv_filt_mode_prev,
WORD32 num_if_bands, FLOAT32 *bw_array,
FLOAT32 *bw_array_prev) {
WORD32 i;
for (i = 0; i < num_if_bands; i++) {
bw_array[i] =
ixheaacd_new_bw_table[inv_filt_mode_prev[i]][inv_filt_mode[i]];
if (bw_array[i] < bw_array_prev[i])
bw_array[i] = 0.75000f * bw_array[i] + 0.25000f * bw_array_prev[i];
else
bw_array[i] = 0.90625f * bw_array[i] + 0.09375f * bw_array_prev[i];
if (bw_array[i] < 0.015625) bw_array[i] = 0;
}
}
static void ixheaacd_gausssolve(WORD32 n, FLOAT32 a[][MAXDEG + 1], FLOAT32 b[],
FLOAT32 y[]) {
WORD32 i, j, k, imax;
FLOAT32 v;
for (i = 0; i < n; i++) {
imax = i;
for (k = i + 1; k < n; k++) {
if (fabs(a[k][i]) > fabs(a[imax][i])) {
imax = k;
}
}
if (imax != i) {
v = b[imax];
b[imax] = b[i];
b[i] = v;
for (j = i; j < n; j++) {
v = a[imax][j];
a[imax][j] = a[i][j];
a[i][j] = v;
}
}
v = a[i][i];
b[i] /= v;
for (j = i; j < n; j++) {
a[i][j] /= v;
}
for (k = i + 1; k < n; k++) {
v = a[k][i];
b[k] -= v * b[i];
for (j = i + 1; j < n; j++) {
a[k][j] -= v * a[i][j];
}
}
}
for (i = n - 1; i >= 0; i--) {
y[i] = b[i];
for (j = i + 1; j < n; j++) {
y[i] -= a[i][j] * y[j];
}
}
}
void ixheaacd_polyfit(WORD32 n, FLOAT32 y[], FLOAT32 p[]) {
WORD32 i, j, k;
FLOAT32 a[MAXDEG + 1][MAXDEG + 1];
FLOAT32 b[MAXDEG + 1];
FLOAT32 v[2 * MAXDEG + 1];
for (i = 0; i <= MAXDEG; i++) {
b[i] = 0.0f;
for (j = 0; j <= MAXDEG; j++) {
a[i][j] = 0.0f;
}
}
for (k = 0; k < n; k++) {
v[0] = 1.0;
for (i = 1; i <= 2 * MAXDEG; i++) {
v[i] = k * v[i - 1];
}
for (i = 0; i <= MAXDEG; i++) {
b[i] += v[MAXDEG - i] * y[k];
for (j = 0; j <= MAXDEG; j++) {
a[i][j] += v[2 * MAXDEG - i - j];
}
}
}
ixheaacd_gausssolve(MAXDEG + 1, a, b, p);
}
VOID ixheaacd_pre_processing(FLOAT32 ptr_src_buf_real[][64],
FLOAT32 ptr_src_buf_imag[][64],
FLOAT32 gain_vector[], WORD32 num_bands,
WORD32 start_sample, WORD32 end_sample) {
WORD32 k, i;
FLOAT32 poly_coeff[4];
FLOAT32 mean_enrg = 0;
FLOAT32 low_env_slope[64];
FLOAT32 low_env[64];
FLOAT32 a0;
FLOAT32 a1;
FLOAT32 a2;
FLOAT32 a3;
for (k = 0; k < num_bands; k++) {
FLOAT32 temp = 0;
for (i = start_sample; i < end_sample; i++) {
temp += ptr_src_buf_real[i][k] * ptr_src_buf_real[i][k] +
ptr_src_buf_imag[i][k] * ptr_src_buf_imag[i][k];
}
temp /= (end_sample - start_sample);
low_env[k] = (FLOAT32)(10 * log10(temp + 1));
mean_enrg = mean_enrg + low_env[k];
}
mean_enrg /= num_bands;
ixheaacd_polyfit(num_bands, low_env, poly_coeff);
a0 = poly_coeff[0];
a1 = poly_coeff[1];
a2 = poly_coeff[2];
a3 = poly_coeff[3];
for (k = 0; k < num_bands; k++) {
FLOAT32 x_low_l = (FLOAT32)k;
FLOAT32 low_env_slope_l = a3;
low_env_slope_l = low_env_slope_l + a2 * x_low_l;
x_low_l = x_low_l * x_low_l;
low_env_slope_l = low_env_slope_l + a1 * x_low_l;
x_low_l = x_low_l * (FLOAT32)k;
low_env_slope_l = low_env_slope_l + a0 * x_low_l;
low_env_slope[k] = low_env_slope_l;
}
for (i = 0; i < num_bands; i++) {
gain_vector[i] = (FLOAT32)pow(10, (mean_enrg - low_env_slope[i]) / 20.0f);
}
}
WORD32 ixheaacd_generate_hf(FLOAT32 ptr_src_buf_real[][64],
FLOAT32 ptr_src_buf_imag[][64],
FLOAT32 ptr_ph_vocod_buf_real[][64],
FLOAT32 ptr_ph_vocod_buf_imag[][64],
FLOAT32 ptr_dst_buf_real[][64],
FLOAT32 ptr_dst_buf_imag[][64],
ia_sbr_frame_info_data_struct *ptr_frame_data,
ia_sbr_header_data_struct *ptr_header_data) {
WORD32 bw_index, i, k, k2, patch = 0;
WORD32 co_var_len;
WORD32 start_sample, end_sample, goal_sb;
WORD32 sb, source_start_band, patch_stride, num_bands_in_patch;
WORD32 hbe_flag = ptr_header_data->hbe_flag;
FLOAT32 a0r, a0i, a1r, a1i;
FLOAT32 bw_array[MAX_NUM_PATCHES] = {0};
ia_auto_corr_ele_struct str_auto_corr;
WORD16 *ptr_invf_band_tbl =
&ptr_header_data->pstr_freq_band_data
->freq_band_tbl_noise[1]; // offest 1 used as base address of
// ptr_invf_band_tbl
WORD32 num_if_bands = ptr_header_data->pstr_freq_band_data->num_nf_bands;
WORD32 sub_band_start = ptr_header_data->pstr_freq_band_data->sub_band_start;
WORD16 *f_master_tbl = ptr_header_data->pstr_freq_band_data->f_master_tbl;
WORD32 num_mf_bands = ptr_header_data->pstr_freq_band_data->num_mf_bands;
WORD32 *inv_filt_mode = ptr_frame_data->sbr_invf_mode;
WORD32 *inv_filt_mode_prev = ptr_frame_data->sbr_invf_mode_prev;
WORD32 sbr_patching_mode = ptr_frame_data->sbr_patching_mode;
ia_frame_info_struct *p_frame_info = &ptr_frame_data->str_frame_info_details;
WORD32 pre_proc_flag = ptr_header_data->pre_proc_flag;
WORD32 is_usf_4 = ptr_header_data->is_usf_4;
WORD32 fs = ptr_header_data->out_sampling_freq;
WORD32 lsb = f_master_tbl[0];
WORD32 usb = f_master_tbl[num_mf_bands];
WORD32 xover_offset = sub_band_start - f_master_tbl[0];
FLOAT32 bw = 0.0f;
FLOAT32 fac = 0.0f;
FLOAT32 gain;
FLOAT32 gain_vector[64];
WORD32 slope_length = 0;
WORD32 first_slot_offset = p_frame_info->border_vec[0];
WORD32 end_slot_offs = 0;
FLOAT32 *bw_array_prev = ptr_frame_data->bw_array_prev;
end_slot_offs = p_frame_info->border_vec[p_frame_info->num_env] - 16;
if (is_usf_4) {
start_sample = first_slot_offset * 4;
end_sample = 64 + end_slot_offs * 4;
co_var_len = 76;
} else {
start_sample = first_slot_offset * 2;
end_sample = 32 + end_slot_offs * 2;
co_var_len = 38;
}
if (pre_proc_flag) {
ixheaacd_pre_processing(ptr_src_buf_real, ptr_src_buf_imag, gain_vector,
f_master_tbl[0], start_sample, end_sample);
}
ixheaacd_esbr_chirp_fac_calc(inv_filt_mode, inv_filt_mode_prev, num_if_bands,
bw_array, bw_array_prev);
for (i = start_sample; i < end_sample; i++) {
memset(ptr_dst_buf_real[i] + usb, 0, (64 - usb) * sizeof(FLOAT32));
memset(ptr_dst_buf_imag[i] + usb, 0, (64 - usb) * sizeof(FLOAT32));
}
if (sbr_patching_mode || !hbe_flag) {
FLOAT32 alpha_real[64][2], alpha_imag[64][2];
for (k = 1; k < f_master_tbl[0]; k++) {
ixheaacd_esbr_calc_co_variance(&str_auto_corr, &ptr_src_buf_real[0],
&ptr_src_buf_imag[0], k, co_var_len);
if (str_auto_corr.det == 0.0f) {
alpha_real[k][1] = alpha_imag[k][1] = 0;
} else {
fac = 1.0f / str_auto_corr.det;
alpha_real[k][1] =
(str_auto_corr.phi_0_1_real * str_auto_corr.phi_1_2_real -
str_auto_corr.phi_0_1_imag * str_auto_corr.phi_1_2_imag -
str_auto_corr.phi_0_2_real * str_auto_corr.phi_1_1) *
fac;
alpha_imag[k][1] =
(str_auto_corr.phi_0_1_imag * str_auto_corr.phi_1_2_real +
str_auto_corr.phi_0_1_real * str_auto_corr.phi_1_2_imag -
str_auto_corr.phi_0_2_imag * str_auto_corr.phi_1_1) *
fac;
}
if (str_auto_corr.phi_1_1 == 0) {
alpha_real[k][0] = alpha_imag[k][0] = 0;
} else {
fac = 1.0f / str_auto_corr.phi_1_1;
alpha_real[k][0] = -(str_auto_corr.phi_0_1_real +
alpha_real[k][1] * str_auto_corr.phi_1_2_real +
alpha_imag[k][1] * str_auto_corr.phi_1_2_imag) *
fac;
alpha_imag[k][0] = -(str_auto_corr.phi_0_1_imag +
alpha_imag[k][1] * str_auto_corr.phi_1_2_real -
alpha_real[k][1] * str_auto_corr.phi_1_2_imag) *
fac;
}
if ((alpha_real[k][0] * alpha_real[k][0] +
alpha_imag[k][0] * alpha_imag[k][0] >=
16.0f) ||
(alpha_real[k][1] * alpha_real[k][1] +
alpha_imag[k][1] * alpha_imag[k][1] >=
16.0f)) {
alpha_real[k][0] = 0.0f;
alpha_imag[k][0] = 0.0f;
alpha_real[k][1] = 0.0f;
alpha_imag[k][1] = 0.0f;
}
}
goal_sb = (WORD32)(2.048e6f / fs + 0.5f);
{
WORD32 index;
if (goal_sb < f_master_tbl[num_mf_bands]) {
for (index = 0; (f_master_tbl[index] < goal_sb); index++)
;
goal_sb = f_master_tbl[index];
} else {
goal_sb = f_master_tbl[num_mf_bands];
}
}
source_start_band = xover_offset + 1;
sb = lsb + xover_offset;
patch = 0;
while (sb < usb) {
if (MAX_NUM_PATCHES <= patch) return -1;
ptr_frame_data->patch_param.start_subband[patch] = sb;
num_bands_in_patch = goal_sb - sb;
if (num_bands_in_patch >= lsb - source_start_band) {
patch_stride = sb - source_start_band;
patch_stride = patch_stride & ~1;
num_bands_in_patch = lsb - (sb - patch_stride);
num_bands_in_patch =
ixheaacd_find_closest_entry(sb + num_bands_in_patch, f_master_tbl,
(WORD16)(num_mf_bands), 0) -
(WORD32)(sb);
}
patch_stride = num_bands_in_patch + sb - lsb;
patch_stride = (patch_stride + 1) & ~1;
source_start_band = 1;
if (goal_sb - (sb + num_bands_in_patch) < 3) {
goal_sb = usb;
}
if ((num_bands_in_patch < 3) && (patch > 0) &&
(sb + num_bands_in_patch == usb)) {
for (i = start_sample + slope_length; i < end_sample + slope_length;
i++) {
for (k2 = sb; k2 < sb + num_bands_in_patch; k2++) {
ptr_dst_buf_real[i][k2] = 0.0f;
ptr_dst_buf_imag[i][k2] = 0.0f;
}
}
break;
}
if (num_bands_in_patch <= 0) {
return -1;
}
for (k2 = sb; k2 < sb + num_bands_in_patch; k2++) {
k = k2 - patch_stride;
bw_index = 0;
while (k2 >= ptr_invf_band_tbl[bw_index]) {
bw_index++;
if (bw_index >= MAX_NOISE_COEFFS) return -1;
}
if (bw_index >= MAX_NUM_PATCHES) return -1;
bw = bw_array[bw_index];
a0r = bw * alpha_real[k][0];
a0i = bw * alpha_imag[k][0];
bw *= bw;
a1r = bw * alpha_real[k][1];
a1i = bw * alpha_imag[k][1];
if (pre_proc_flag) {
gain = gain_vector[k];
} else {
gain = 1.0f;
}
for (i = start_sample + slope_length; i < end_sample + slope_length;
i++) {
ptr_dst_buf_real[i][k2] = ptr_src_buf_real[i][k] * gain;
ptr_dst_buf_imag[i][k2] = ptr_src_buf_imag[i][k] * gain;
if (bw > 0.0f) {
ptr_dst_buf_real[i][k2] += (a0r * ptr_src_buf_real[i - 1][k] -
a0i * ptr_src_buf_imag[i - 1][k] +
a1r * ptr_src_buf_real[i - 2][k] -
a1i * ptr_src_buf_imag[i - 2][k]) *
gain;
ptr_dst_buf_imag[i][k2] += (a0i * ptr_src_buf_real[i - 1][k] +
a0r * ptr_src_buf_imag[i - 1][k] +
a1i * ptr_src_buf_real[i - 2][k] +
a1r * ptr_src_buf_imag[i - 2][k]) *
gain;
}
}
}
sb += num_bands_in_patch;
patch++;
}
}
if (hbe_flag && !sbr_patching_mode) {
FLOAT32 alpha_real[2], alpha_imag[2];
bw_index = 0, patch = 1;
if (NULL == ptr_ph_vocod_buf_real || NULL == ptr_ph_vocod_buf_imag)
return -1;
for (k2 = sub_band_start; k2 < f_master_tbl[num_mf_bands]; k2++) {
ixheaacd_esbr_calc_co_variance(&str_auto_corr, &ptr_ph_vocod_buf_real[0],
&ptr_ph_vocod_buf_imag[0], k2, co_var_len);
if (str_auto_corr.det == 0.0f) {
alpha_real[1] = alpha_imag[1] = 0;
} else {
fac = 1.0f / str_auto_corr.det;
alpha_real[1] =
(str_auto_corr.phi_0_1_real * str_auto_corr.phi_1_2_real -
str_auto_corr.phi_0_1_imag * str_auto_corr.phi_1_2_imag -
str_auto_corr.phi_0_2_real * str_auto_corr.phi_1_1) *
fac;
alpha_imag[1] =
(str_auto_corr.phi_0_1_imag * str_auto_corr.phi_1_2_real +
str_auto_corr.phi_0_1_real * str_auto_corr.phi_1_2_imag -
str_auto_corr.phi_0_2_imag * str_auto_corr.phi_1_1) *
fac;
}
if (str_auto_corr.phi_1_1 == 0) {
alpha_real[0] = alpha_imag[0] = 0;
} else {
fac = 1.0f / str_auto_corr.phi_1_1;
alpha_real[0] = -(str_auto_corr.phi_0_1_real +
alpha_real[1] * str_auto_corr.phi_1_2_real +
alpha_imag[1] * str_auto_corr.phi_1_2_imag) *
fac;
alpha_imag[0] = -(str_auto_corr.phi_0_1_imag +
alpha_imag[1] * str_auto_corr.phi_1_2_real -
alpha_real[1] * str_auto_corr.phi_1_2_imag) *
fac;
}
if (alpha_real[0] * alpha_real[0] + alpha_imag[0] * alpha_imag[0] >=
16.0f ||
alpha_real[1] * alpha_real[1] + alpha_imag[1] * alpha_imag[1] >=
16.0f) {
alpha_real[0] = 0.0f;
alpha_imag[0] = 0.0f;
alpha_real[1] = 0.0f;
alpha_imag[1] = 0.0f;
}
while (k2 >= ptr_invf_band_tbl[bw_index]) {
bw_index++;
if (bw_index >= MAX_NOISE_COEFFS) return -1;
}
if (bw_index >= MAX_NUM_PATCHES) return -1;
bw = bw_array[bw_index];
a0r = bw * alpha_real[0];
a0i = bw * alpha_imag[0];
bw *= bw;
a1r = bw * alpha_real[1];
a1i = bw * alpha_imag[1];
if (bw > 0.0f) {
for (i = start_sample; i < end_sample; i++) {
FLOAT32 real1, imag1, real2, imag2, realTarget, imag_target;
realTarget = ptr_ph_vocod_buf_real[i][k2];
imag_target = ptr_ph_vocod_buf_imag[i][k2];
real1 = ptr_ph_vocod_buf_real[i - 1][k2];
imag1 = ptr_ph_vocod_buf_imag[i - 1][k2];
real2 = ptr_ph_vocod_buf_real[i - 2][k2];
imag2 = ptr_ph_vocod_buf_imag[i - 2][k2];
realTarget +=
((a0r * real1 - a0i * imag1) + (a1r * real2 - a1i * imag2));
imag_target +=
((a0i * real1 + a0r * imag1) + (a1i * real2 + a1r * imag2));
ptr_dst_buf_real[i][k2] = realTarget;
ptr_dst_buf_imag[i][k2] = imag_target;
}
} else {
for (i = start_sample; i < end_sample; i++) {
ptr_dst_buf_real[i][k2] = ptr_ph_vocod_buf_real[i][k2];
ptr_dst_buf_imag[i][k2] = ptr_ph_vocod_buf_imag[i][k2];
}
}
}
}
ptr_frame_data->patch_param.num_patches = patch;
if (patch >= (MAX_NUM_PATCHES + 1)) return -1;
for (i = 0; i < num_if_bands; i++) {
bw_array_prev[i] = bw_array[i];
}
return 0;
}
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