142 lines
5.2 KiB
C
142 lines
5.2 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 "iusace_cnst.h"
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#include "iusace_bitbuffer.h"
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#include "iusace_tns_usac.h"
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#include "iusace_psy_mod.h"
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#include "ixheaac_basic_ops32.h"
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#include "ixheaac_basic_ops40.h"
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#include "ixheaac_basic_ops.h"
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VOID iusace_ms_apply(ia_psy_mod_data_struct *pstr_psy_data, FLOAT64 *ptr_spec_left,
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FLOAT64 *ptr_spec_right, WORD32 *ms_select,
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WORD32 ms_used[MAX_SHORT_WINDOWS][MAX_SFB_LONG], const WORD32 sfb_count,
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const WORD32 sfb_per_group, const WORD32 max_sfb_per_grp,
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const WORD32 *ptr_sfb_offsets, WORD32 chn, FLOAT64 *ptr_ms_spec) {
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FLOAT32 *ptr_sfb_enegry_left = pstr_psy_data[chn].ptr_sfb_energy_long;
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FLOAT32 *ptr_sfb_energy_right = pstr_psy_data[chn + 1].ptr_sfb_energy_long;
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const FLOAT32 *ptr_sfb_energy_mid = pstr_psy_data[chn].ptr_sfb_energy_long_ms;
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const FLOAT32 *ptr_sfb_energy_side = pstr_psy_data[chn + 1].ptr_sfb_energy_long_ms;
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FLOAT32 *ptr_sfb_thr_left = pstr_psy_data[chn].ptr_sfb_thr_long;
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FLOAT32 *ptr_sfb_thr_right = pstr_psy_data[chn + 1].ptr_sfb_thr_long;
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FLOAT32 *ptr_sfb_spread_energy_left = pstr_psy_data[chn].ptr_sfb_spreaded_energy_long;
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FLOAT32 *ptr_sfb_spread_energy_right = pstr_psy_data[chn + 1].ptr_sfb_spreaded_energy_long;
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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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*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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ms_used[grp][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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use_ms = (mid_side >= left_right);
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if (use_ms) {
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ms_used[grp][sfb_offsets] = 1;
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for (j = ptr_sfb_offsets[sfb + sfb_offsets]; j < ptr_sfb_offsets[sfb + sfb_offsets + 1];
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j++) {
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if (ptr_ms_spec != NULL) {
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ptr_spec_left[j] = ptr_ms_spec[j];
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ptr_spec_right[j] = ptr_ms_spec[1024 + j];
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} else {
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FLOAT64 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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}
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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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ms_used[grp][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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*ms_select = 0;
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} else {
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if (lr_counter != 0) {
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*ms_select = 1;
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} else {
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*ms_select = 2;
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}
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}
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return;
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}
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VOID iusace_calc_ms_band_energy(const FLOAT64 *ptr_spec_left, const FLOAT64 *ptr_spec_right,
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const WORD32 *ptr_band_offset, const WORD32 num_bands,
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FLOAT32 *ptr_band_energy_mid, FLOAT32 *ptr_band_energy_side) {
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WORD32 i, j;
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j = 0;
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for (i = 0; i < num_bands; i++) {
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ptr_band_energy_mid[i] = 0.0f;
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ptr_band_energy_side[i] = 0.0f;
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while (j < ptr_band_offset[i + 1]) {
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FLOAT32 specm, specs;
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specm = (FLOAT32)(0.5f * (ptr_spec_left[j] + ptr_spec_right[j]));
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specs = (FLOAT32)(0.5f * (ptr_spec_left[j] - ptr_spec_right[j]));
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ptr_band_energy_mid[i] += specm * specm;
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ptr_band_energy_side[i] += specs * specs;
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j++;
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}
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}
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return;
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}
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