/******************************************************************************
* *
* 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
*/
#define DEBUG
#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_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_main.h"
#include "ixheaacd_arith_dec.h"
#include "ixheaacd_func_def.h"
#include "ixheaacd_acelp_com.h"
#include <ixheaacd_basic_op.h>
#include "ixheaacd_constants.h"
#include <ixheaacd_basic_ops32.h>
#include <ixheaacd_basic_ops40.h>
#define LSF_GAP 50.0f
#define FREQ_MAX 6400.0f
#define FREQ_DIV 400.0f
static FLOAT32 factor_table[4] = {60.0f, 65.0f, 64.0f, 63.0f};
VOID ixheaacd_lsf_weight_2st_flt(FLOAT32 *lsfq, FLOAT32 *w, WORD32 mode) {
WORD32 i;
FLOAT32 d[ORDER + 1];
d[0] = lsfq[0];
d[ORDER] = FREQ_MAX - lsfq[ORDER - 1];
for (i = 1; i < ORDER; i++) {
d[i] = lsfq[i] - lsfq[i - 1];
}
for (i = 0; i < ORDER; i++) {
w[i] = (FLOAT32)(factor_table[mode] / (FREQ_DIV / sqrt(d[i] * d[i + 1])));
}
return;
}
static WORD32 ixheaacd_decoding_avq_tool(WORD32 *read_arr, WORD32 *nvecq) {
WORD32 i, k, n, qn, nk, kv[8] = {0};
WORD32 code_book_idx;
WORD32 *ptr_kv = &kv[0];
WORD32 position = 2;
for (k = 0; k < 2; k++) {
qn = read_arr[k];
nk = 0;
n = qn;
if (qn > 4) {
nk = (qn - 3) >> 1;
n = qn - nk * 2;
}
if (qn > 0) {
code_book_idx = read_arr[position++];
ptr_kv = &read_arr[position];
position += 8;
} else {
code_book_idx = 0;
for (i = 0; i < 8; i++) ptr_kv = &kv[0];
}
ixheaacd_rotated_gosset_mtx_dec(qn, code_book_idx, ptr_kv, &nvecq[k * 8]);
}
return position;
}
static WORD32 ixheaacd_avq_first_approx_abs(FLOAT32 *lsf, WORD32 *indx) {
WORD32 i;
extern FLOAT32 ixheaacd_dico_lsf_abs_8b_flt[];
extern FLOAT32 ixheaacd_weight_table_avq[];
WORD32 position = 0;
WORD32 avq[ORDER];
FLOAT32 d[ORDER + 1], lsf_min;
FLOAT32 *ptr_w;
ptr_w = &ixheaacd_weight_table_avq[(indx[0] * ORDER)];
position++;
for (i = 0; i < ORDER; i++) {
lsf[i] = ixheaacd_dico_lsf_abs_8b_flt[indx[0] * ORDER + i];
}
position += ixheaacd_decoding_avq_tool(&indx[position], avq);
d[0] = lsf[0];
d[ORDER] = FREQ_MAX - lsf[ORDER - 1];
for (i = 1; i < ORDER; i++) {
d[i] = lsf[i] - lsf[i - 1];
}
lsf_min = LSF_GAP;
for (i = 0; i < ORDER; i++) {
lsf[i] += (ptr_w[i] * avq[i]);
if (lsf[i] < lsf_min) lsf[i] = lsf_min;
lsf_min = lsf[i] + LSF_GAP;
}
return position;
}
WORD32 ixheaacd_avq_first_approx_rel(FLOAT32 *lsf, WORD32 *indx, WORD32 mode) {
WORD32 i;
FLOAT32 w[ORDER];
WORD32 avq[ORDER];
WORD32 position = 0;
FLOAT32 lsf_min;
ixheaacd_lsf_weight_2st_flt(lsf, w, mode);
position = ixheaacd_decoding_avq_tool(indx, avq);
lsf_min = LSF_GAP;
for (i = 0; i < ORDER; i++) {
lsf[i] += (w[i] * avq[i]);
if (lsf[i] < lsf_min) lsf[i] = lsf_min;
lsf_min = lsf[i] + LSF_GAP;
}
return position;
}
VOID ixheaacd_alg_vec_dequant(ia_td_frame_data_struct *pstr_td_frame_data,
WORD32 first_lpd_flag, FLOAT32 *lsf,
WORD32 mod[]) {
WORD32 i;
WORD32 *lpc_index, mode_lpc, pos = 0;
lpc_index = pstr_td_frame_data->lpc_first_approx_idx;
pos = ixheaacd_avq_first_approx_abs(&lsf[4 * ORDER], &lpc_index[0]);
lpc_index += pos;
if (first_lpd_flag) {
mode_lpc = lpc_index[0];
lpc_index++;
if (mode_lpc == 0) {
pos = ixheaacd_avq_first_approx_abs(&lsf[0], &lpc_index[0]);
} else if (mode_lpc == 1) {
for (i = 0; i < ORDER; i++) lsf[i] = lsf[4 * ORDER + i];
pos = ixheaacd_avq_first_approx_rel(&lsf[0], &lpc_index[0], 3);
}
lpc_index += pos;
}
if (mod[0] < 3) {
mode_lpc = lpc_index[0];
lpc_index++;
if (mode_lpc == 0) {
pos = ixheaacd_avq_first_approx_abs(&lsf[2 * ORDER], &lpc_index[0]);
} else if (mode_lpc == 1) {
for (i = 0; i < ORDER; i++) lsf[2 * ORDER + i] = lsf[4 * ORDER + i];
pos = ixheaacd_avq_first_approx_rel(&lsf[2 * ORDER], &lpc_index[0], 3);
}
lpc_index += pos;
}
if (mod[0] < 2) {
mode_lpc = lpc_index[0];
lpc_index++;
if (mode_lpc == 1) {
for (i = 0; i < ORDER; i++)
lsf[ORDER + i] = 0.5f * (lsf[i] + lsf[2 * ORDER + i]);
} else {
if (mode_lpc == 0) {
pos = ixheaacd_avq_first_approx_abs(&lsf[ORDER], &lpc_index[0]);
} else if (mode_lpc == 2) {
for (i = 0; i < ORDER; i++) lsf[ORDER + i] = lsf[2 * ORDER + i];
pos = ixheaacd_avq_first_approx_rel(&lsf[ORDER], &lpc_index[0], 2);
}
lpc_index += pos;
}
}
if (mod[2] < 2) {
mode_lpc = lpc_index[0];
lpc_index++;
if (mode_lpc == 0) {
pos = ixheaacd_avq_first_approx_abs(&lsf[3 * ORDER], &lpc_index[0]);
} else if (mode_lpc == 1) {
for (i = 0; i < ORDER; i++)
lsf[3 * ORDER + i] = 0.5f * (lsf[2 * ORDER + i] + lsf[4 * ORDER + i]);
pos = ixheaacd_avq_first_approx_rel(&lsf[3 * ORDER], &lpc_index[0], 1);
} else if (mode_lpc == 2) {
for (i = 0; i < ORDER; i++) lsf[3 * ORDER + i] = lsf[2 * ORDER + i];
pos = ixheaacd_avq_first_approx_rel(&lsf[3 * ORDER], &lpc_index[0], 2);
} else if (mode_lpc == 3) {
for (i = 0; i < ORDER; i++) lsf[3 * ORDER + i] = lsf[4 * ORDER + i];
pos = ixheaacd_avq_first_approx_rel(&lsf[3 * ORDER], &lpc_index[0], 2);
}
lpc_index += pos;
}
}