137 lines
5.1 KiB
C
137 lines
5.1 KiB
C
/******************************************************************************
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* *
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* Copyright (C) 2023 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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*****************************************************************************
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* Originally developed and contributed by Ittiam Systems Pvt. Ltd, Bangalore
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*/
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#include "ixheaac_type_def.h"
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#include "ixheaac_constants.h"
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#include "ixheaace_aac_constants.h"
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#include <stdlib.h>
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#include "ixheaace_psy_const.h"
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#include "ixheaace_tns.h"
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#include "ixheaace_tns_params.h"
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#include "ixheaace_rom.h"
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#include "ixheaace_common_rom.h"
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#include "ixheaace_bitbuffer.h"
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#include "ixheaac_basic_ops32.h"
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#include "ixheaac_basic_ops16.h"
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#include "ixheaac_basic_ops40.h"
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#include "ixheaac_basic_ops.h"
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#include <math.h>
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#include "ixheaace_block_switch.h"
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#include "ixheaace_psy_utils_spreading.h"
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#include "ixheaace_psy_utils.h"
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#include "ixheaace_calc_ms_band_energy.h"
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#include "ixheaace_psy_configuration.h"
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#include "ixheaace_psy_data.h"
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#include "ixheaace_ms_stereo.h"
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#include "ixheaace_common_utils.h"
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VOID iaace_ms_apply(ixheaace_psy_data **ptr_psy_data, FLOAT32 *ptr_spec_left,
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FLOAT32 *ptr_spec_right, WORD32 *ptr_ms_select, WORD32 *ptr_ms_used,
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const WORD32 sfb_count, const WORD32 sfb_per_group,
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const WORD32 max_sfb_per_grp, const WORD32 *ptr_sfb_offset,
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FLOAT32 *ptr_weight_ms_lr_pe_ratio) {
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FLOAT32 *ptr_sfb_enegry_left = ptr_psy_data[0]->sfb_energy.long_nrg;
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FLOAT32 *ptr_sfb_energy_right = ptr_psy_data[1]->sfb_energy.long_nrg;
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const FLOAT32 *ptr_sfb_energy_mid = ptr_psy_data[0]->sfb_energy_ms.long_nrg;
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const FLOAT32 *ptr_sfb_energy_side = ptr_psy_data[1]->sfb_energy_ms.long_nrg;
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FLOAT32 *ptr_sfb_thr_left = ptr_psy_data[0]->sfb_threshold.long_nrg;
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FLOAT32 *ptr_sfb_thr_right = ptr_psy_data[1]->sfb_threshold.long_nrg;
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FLOAT32 *ptr_sfb_spread_energy_left = ptr_psy_data[0]->sfb_sreaded_energy.long_nrg;
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FLOAT32 *ptr_sfb_spread_energy_right = ptr_psy_data[1]->sfb_sreaded_energy.long_nrg;
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WORD32 sfb, sfb_offsets, j;
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WORD32 grp = 0;
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WORD32 ms_counter = 0;
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WORD32 lr_counter = 0;
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FLOAT32 sum_ss_sr_pe_ratio = 0;
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WORD32 cnt = 0;
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FLOAT32 atan_val;
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*ptr_ms_select = 0;
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for (sfb = 0; sfb < sfb_count; sfb += sfb_per_group, grp++) {
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for (sfb_offsets = 0; sfb_offsets < max_sfb_per_grp; sfb_offsets++) {
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FLOAT32 left_right, mid_side, min_thr;
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WORD32 use_ms;
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ptr_ms_used[sfb + sfb_offsets] = 0;
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min_thr = MIN(ptr_sfb_thr_left[sfb + sfb_offsets], ptr_sfb_thr_right[sfb + sfb_offsets]);
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left_right =
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(ptr_sfb_thr_left[sfb + sfb_offsets] /
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MAX(ptr_sfb_enegry_left[sfb + sfb_offsets], ptr_sfb_thr_left[sfb + sfb_offsets])) *
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(ptr_sfb_thr_right[sfb + sfb_offsets] /
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MAX(ptr_sfb_energy_right[sfb + sfb_offsets], ptr_sfb_thr_right[sfb + sfb_offsets]));
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mid_side = (min_thr / MAX(ptr_sfb_energy_mid[sfb + sfb_offsets], min_thr)) *
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(min_thr / MAX(ptr_sfb_energy_side[sfb + sfb_offsets], min_thr));
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sum_ss_sr_pe_ratio += (left_right + 1.0e-9f) / (mid_side + 1.0e-9f);
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cnt++;
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use_ms = (mid_side >= left_right);
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if (use_ms) {
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ptr_ms_used[sfb + sfb_offsets] = 1;
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for (j = ptr_sfb_offset[sfb + sfb_offsets]; j < ptr_sfb_offset[sfb + sfb_offsets + 1];
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j++) {
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FLOAT32 tmp = ptr_spec_left[j];
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ptr_spec_left[j] = 0.5f * (ptr_spec_left[j] + ptr_spec_right[j]);
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ptr_spec_right[j] = 0.5f * (tmp - ptr_spec_right[j]);
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}
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ptr_sfb_thr_left[sfb + sfb_offsets] = ptr_sfb_thr_right[sfb + sfb_offsets] = min_thr;
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ptr_sfb_enegry_left[sfb + sfb_offsets] = ptr_sfb_energy_mid[sfb + sfb_offsets];
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ptr_sfb_energy_right[sfb + sfb_offsets] = ptr_sfb_energy_side[sfb + sfb_offsets];
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ptr_sfb_spread_energy_left[sfb + sfb_offsets] =
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ptr_sfb_spread_energy_right[sfb + sfb_offsets] =
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MIN(ptr_sfb_spread_energy_left[sfb + sfb_offsets],
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ptr_sfb_spread_energy_right[sfb + sfb_offsets]) *
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0.5f;
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ms_counter++;
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} else {
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ptr_ms_used[sfb + sfb_offsets] = 0;
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lr_counter++;
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}
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}
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}
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if (ms_counter == 0) {
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*ptr_ms_select = 0;
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} else {
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if (lr_counter != 0) {
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*ptr_ms_select = 1;
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} else {
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*ptr_ms_select = 2;
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}
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}
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cnt = MAX(1, cnt);
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atan_val = iaace_atan_approx((FLOAT32)(0.37f * (sum_ss_sr_pe_ratio / cnt - 6.5f)));
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*ptr_weight_ms_lr_pe_ratio = (FLOAT32)((0.28f * atan_val) + 1.25f);
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}
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