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/******************************************************************************
* *
* 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
*/
#pragma once
typedef enum {
ID_SCE = 0, /*Single Channel Element*/
ID_CPE, /*Channel Pair Element*/
ID_CCE, /*Coupling channel Element*/
ID_LFE, /*Low frequency Effect Channel*/
ID_DSE,
ID_PCE, /*Program Config. Element*/
ID_FIL, /*Fill element*/
ID_END /*End of block*/
} ixheaace_element_type;
typedef enum {
FRONT_CENTER = 0,
FRONT_LEFT_RIGHT,
BACK_LEFT_RIGHT,
REAR_CENTER,
LFE_CHANNEL,
COUPLING_CH,
} ELEMENT_NAME;
typedef enum { FRAME_LEN_BYTES_MODULO = 1, FRAME_LEN_BYTES_INT = 2 } FRAME_LEN_RESULT_MODE;
typedef struct {
ixheaace_element_type el_type;
WORD32 instance_tag;
WORD32 n_channels_in_el;
WORD32 channel_index[IXHEAACE_MAX_CH_IN_BS_ELE];
} ixheaace_element_info;
typedef struct {
WORD32 padding_rest;
} ixheaace_padding;
/* Quantizing & coding stage */
typedef struct {
ixheaace_element_info *pstr_element_info;
WORD32 max_bits; /* maximum number of bits in reservoir */
WORD32 average_bits; /* average number of bits we should use */
WORD32 bit_res;
FLOAT32 mean_pe;
WORD32 ch_bitrate;
WORD32 inv_quant;
FLOAT32 max_bit_fac;
WORD32 bitrate;
ixheaace_padding padding;
} ixheaace_qc_init;
#define RED_EXP_VAL 0.25f
#define INV_RED_EXP_VAL (1.0f / RED_EXP_VAL)
#define MIN_SNR_LIMIT 0.8f
#define MAX_SCF_DELTA 60
#define LOG2_1 1.442695041f
#define C1_SF -69.33295f /* -16/3*log(MAX_QUANT+0.5-logCon)/log(2) */
#define C2_SF 5.77078f /* 4/log(2) */
#define PE_C1 3.0f /* log(8.0)/log(2) */
#define PE_C2 1.3219281f /* log(2.5)/log(2) */
#define PE_C3 0.5593573f /* 1-C2/C1 */
#define TRANSPORT_BITS (208)
#define MAX_GAIN_INDEX_AAC (128)
#define MIN_GAIN_INDEX_AAC (-128)
#define SCF_COUNT_LIMIT_AAC (1)
typedef struct {
WORD16 *quant_spec;
UWORD16 *max_val_in_sfb;
WORD16 *scalefactor;
WORD32 global_gain;
WORD32 grouping_mask;
ixheaace_section_data section_data;
WORD32 win_shape;
} ixheaace_qc_out_channel;
typedef struct {
WORD32 static_bits_used; /* for verification purposes */
WORD32 dyn_bits_used; /* for verification purposes */
FLOAT32 pe;
WORD32 anc_bits_used;
WORD32 fill_bits;
} ixheaace_qc_out_element;
typedef struct {
ixheaace_qc_out_channel *qc_channel[IXHEAACE_MAX_CH_IN_BS_ELE];
ixheaace_qc_out_element qc_element;
WORD32 tot_static_bits_used; /* for verification purposes */
WORD32 tot_dyn_bits_used; /* for verification purposes */
WORD32 tot_anc_bits_used; /* for verification purposes */
WORD32 total_fill_bits;
WORD32 align_bits;
WORD32 bit_res_tot;
WORD32 average_bits_tot;
} ixheaace_qc_out;
typedef struct {
WORD32 ch_bitrate;
WORD32 average_bits; /* brutto -> look pstr_ancillary.h */
WORD32 max_bits;
WORD32 bit_res_level;
WORD32 max_bit_res_bits;
WORD32 relative_bits; /* Bits relative to total Bits*/
WORD32 carry_bits; /* Bits carried over from prev. frame */
} ixheaace_element_bits;
typedef struct {
WORD32 *shared_buffer_2;
} ixheaace_qc_scratch;
typedef struct {
/* this is basically struct ixheaace_qc_init */
WORD32 average_bits_tot;
WORD32 max_bits_tot;
WORD32 glob_stat_bits;
WORD32 num_channels;
WORD32 bit_res_tot;
WORD32 quality_level;
ixheaace_padding padding;
ixheaace_element_bits element_bits;
FLOAT32 max_bit_fac;
ia_adj_thr_state_struct str_adj_thr;
WORD32 side_info_tab_long[MAXIMUM_SCALE_FACTOR_BAND_LONG + 1];
WORD32 side_info_tab_short[MAXIMUM_SCALE_FACTOR_BAND_SHORT + 1];
ixheaace_qc_scratch qc_scr;
} ixheaace_qc_state;
typedef struct {
FLOAT32 exp_spec[FRAME_LEN_1024];
FLOAT32 mdct_spec_float[FRAME_LEN_1024];
FLOAT32 sfb_form_fac[IXHEAACE_MAX_CH_IN_BS_ELE][MAXIMUM_GROUPED_SCALE_FACTOR_BAND];
FLOAT32 sfb_num_relevant_lines[IXHEAACE_MAX_CH_IN_BS_ELE][MAXIMUM_GROUPED_SCALE_FACTOR_BAND];
FLOAT32 sfb_ld_energy[IXHEAACE_MAX_CH_IN_BS_ELE][MAXIMUM_GROUPED_SCALE_FACTOR_BAND];
} ixheaace_qc_stack;
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