64 lines
3.5 KiB
C
64 lines
3.5 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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#pragma once
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typedef struct {
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FLOAT32 norm_pe_fac; /* factor to normalize input PE, depends on bitrate and bandwidth */
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FLOAT32 inc_stereo_attenuation; /* att. increment parameter */
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FLOAT32 dec_stereo_attenuation; /* att. decrement parameter */
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FLOAT32 average_freq_energy_l; /* energy left */
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FLOAT32 average_freq_energy_r; /* energy right */
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FLOAT32 average_freq_energy_m; /* energy mid */
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FLOAT32 average_freq_energy_s; /* energy side */
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FLOAT32 smoothed_pe_sum_sum; /* time-smoothed PE */
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FLOAT32 avg_s_to_m; /* time-smoothed energy ratio S/M [dB] */
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FLOAT32 last_l_to_r; /* previous frame energy ratio L/R [dB] */
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FLOAT32 last_nrg_lr; /* previous frame energy L+R */
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FLOAT32 impact_factor; /* bitrate dependent parameter */
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FLOAT32 stereo_attenuation; /* the actual attenuation of this frame */
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FLOAT32 stereo_attenuation_fac; /* the actual attenuation factor of this frame */
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/* tuning parameters that are not varied from frame to frame but initialized at init */
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WORD32 stereo_attenuation_flag; /* flag to indicate usage */
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FLOAT32 const_attenuation; /* if not zero, a constant att. will be applied [dB]*/
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FLOAT32 stereo_attenuation_max; /* the max. attenuation [dB]*/
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FLOAT32 lr_min; /* tuning parameter [dB] */
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FLOAT32 lr_max; /* tuning parameter [dB] */
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FLOAT32 sm_min; /* tuning parameter [dB] */
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FLOAT32 sm_max; /* tuning parameter [dB] */
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FLOAT32 pe_min; /* tuning parameter */
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FLOAT32 pe_crit; /* tuning parameter */
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FLOAT32 pe_impact_max; /* tuning parameter */
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} ixheaace_stereo_pre_pro_struct;
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typedef ixheaace_stereo_pre_pro_struct *ixheaace_stereo_pre_pro_pstr;
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IA_ERRORCODE iaace_init_stereo_pre_processing(ixheaace_stereo_pre_pro_pstr pstr_stereo_pre_pro,
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WORD32 no_channels, WORD32 bit_rate, WORD32 sample_rate,
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FLOAT32 used_scf_ratio);
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VOID iaace_apply_stereo_preproc(ixheaace_stereo_pre_pro_pstr pstr_stereo_pre_pro,
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WORD32 num_channels, ixheaace_element_info *pstr_elem_info,
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FLOAT32 *ptr_time_data, WORD32 granule_len);
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VOID iaace_update_stereo_pre_process(ixheaace_psy_out_channel **pstr_psy_out,
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ixheaace_qc_out_element *pstr_qc_out,
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ixheaace_stereo_pre_pro_pstr pstr_stereo_pre_pro,
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FLOAT32 weight_pe_fac);
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