/****************************************************************************** * * * Copyright (C) 2023 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 "ixheaac_type_def.h" #include "ixheaac_constants.h" #include "iusace_cnst.h" #include "iusace_bitbuffer.h" #include "iusace_tns_usac.h" #include "iusace_psy_mod.h" #include "ixheaac_basic_ops32.h" #include "ixheaac_basic_ops40.h" #include "ixheaac_basic_ops.h" VOID iusace_ms_apply(ia_psy_mod_data_struct *pstr_psy_data, FLOAT64 *ptr_spec_left, FLOAT64 *ptr_spec_right, WORD32 *ms_select, WORD32 ms_used[MAX_SHORT_WINDOWS][MAX_SFB_LONG], const WORD32 sfb_count, const WORD32 sfb_per_group, const WORD32 max_sfb_per_grp, const WORD32 *ptr_sfb_offsets, WORD32 chn, FLOAT64 *ptr_ms_spec) { FLOAT32 *ptr_sfb_enegry_left = pstr_psy_data[chn].ptr_sfb_energy_long; FLOAT32 *ptr_sfb_energy_right = pstr_psy_data[chn + 1].ptr_sfb_energy_long; const FLOAT32 *ptr_sfb_energy_mid = pstr_psy_data[chn].ptr_sfb_energy_long_ms; const FLOAT32 *ptr_sfb_energy_side = pstr_psy_data[chn + 1].ptr_sfb_energy_long_ms; FLOAT32 *ptr_sfb_thr_left = pstr_psy_data[chn].ptr_sfb_thr_long; FLOAT32 *ptr_sfb_thr_right = pstr_psy_data[chn + 1].ptr_sfb_thr_long; FLOAT32 *ptr_sfb_spread_energy_left = pstr_psy_data[chn].ptr_sfb_spreaded_energy_long; FLOAT32 *ptr_sfb_spread_energy_right = pstr_psy_data[chn + 1].ptr_sfb_spreaded_energy_long; WORD32 sfb, sfb_offsets, j; WORD32 grp = 0; WORD32 ms_counter = 0; WORD32 lr_counter = 0; *ms_select = 0; for (sfb = 0; sfb < sfb_count; sfb += sfb_per_group, grp++) { for (sfb_offsets = 0; sfb_offsets < max_sfb_per_grp; sfb_offsets++) { FLOAT32 left_right, mid_side, min_thr; WORD32 use_ms; ms_used[grp][sfb_offsets] = 0; min_thr = MIN(ptr_sfb_thr_left[sfb + sfb_offsets], ptr_sfb_thr_right[sfb + sfb_offsets]); left_right = (ptr_sfb_thr_left[sfb + sfb_offsets] / MAX(ptr_sfb_enegry_left[sfb + sfb_offsets], ptr_sfb_thr_left[sfb + sfb_offsets])) * (ptr_sfb_thr_right[sfb + sfb_offsets] / max(ptr_sfb_energy_right[sfb + sfb_offsets], ptr_sfb_thr_right[sfb + sfb_offsets])); mid_side = (min_thr / max(ptr_sfb_energy_mid[sfb + sfb_offsets], min_thr)) * (min_thr / max(ptr_sfb_energy_side[sfb + sfb_offsets], min_thr)); use_ms = (mid_side >= left_right); if (use_ms) { ms_used[grp][sfb_offsets] = 1; for (j = ptr_sfb_offsets[sfb + sfb_offsets]; j < ptr_sfb_offsets[sfb + sfb_offsets + 1]; j++) { if (ptr_ms_spec != NULL) { ptr_spec_left[j] = ptr_ms_spec[j]; ptr_spec_right[j] = ptr_ms_spec[1024 + j]; } else { FLOAT64 tmp = ptr_spec_left[j]; ptr_spec_left[j] = 0.5f * (ptr_spec_left[j] + ptr_spec_right[j]); ptr_spec_right[j] = 0.5f * (tmp - ptr_spec_right[j]); } } ptr_sfb_thr_left[sfb + sfb_offsets] = ptr_sfb_thr_right[sfb + sfb_offsets] = min_thr; ptr_sfb_enegry_left[sfb + sfb_offsets] = ptr_sfb_energy_mid[sfb + sfb_offsets]; ptr_sfb_energy_right[sfb + sfb_offsets] = ptr_sfb_energy_side[sfb + sfb_offsets]; ptr_sfb_spread_energy_left[sfb + sfb_offsets] = ptr_sfb_spread_energy_right[sfb + sfb_offsets] = min(ptr_sfb_spread_energy_left[sfb + sfb_offsets], ptr_sfb_spread_energy_right[sfb + sfb_offsets]) * 0.5f; ms_counter++; } else { ms_used[grp][sfb_offsets] = 0; lr_counter++; } } } if (ms_counter == 0) { *ms_select = 0; } else { if (lr_counter != 0) { *ms_select = 1; } else { *ms_select = 2; } } return; } VOID iusace_calc_ms_band_energy(const FLOAT64 *ptr_spec_left, const FLOAT64 *ptr_spec_right, const WORD32 *ptr_band_offset, const WORD32 num_bands, FLOAT32 *ptr_band_energy_mid, FLOAT32 *ptr_band_energy_side) { WORD32 i, j; j = 0; for (i = 0; i < num_bands; i++) { ptr_band_energy_mid[i] = 0.0f; ptr_band_energy_side[i] = 0.0f; while (j < ptr_band_offset[i + 1]) { FLOAT32 specm, specs; specm = (FLOAT32)(0.5f * (ptr_spec_left[j] + ptr_spec_right[j])); specs = (FLOAT32)(0.5f * (ptr_spec_left[j] - ptr_spec_right[j])); ptr_band_energy_mid[i] += specm * specm; ptr_band_energy_side[i] += specs * specs; j++; } } return; }