1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
|
/******************************************************************************
*
* Copyright (C) 2018 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
*/
#ifndef IMPD_DRC_FILTER_BANK_H
#define IMPD_DRC_FILTER_BANK_H
#define FILTER_BANK_PARAMETER_COUNT 16
#define CASCADE_ALLPASS_COUNT_MAX 9
#define QMF_NUM_FILT_BANDS 64
#define QMF_FILT_RESOLUTION 64
typedef struct ia_drc_qmf_filt_struct {
FLOAT64* ana_buff;
FLOAT64* syn_buff;
FLOAT64 ana_tab_real[QMF_NUM_FILT_BANDS][2 * QMF_NUM_FILT_BANDS];
FLOAT64 ana_tab_imag[QMF_NUM_FILT_BANDS][2 * QMF_NUM_FILT_BANDS];
FLOAT64 syn_tab_real[2 * QMF_NUM_FILT_BANDS][QMF_NUM_FILT_BANDS];
FLOAT64 syn_tab_imag[2 * QMF_NUM_FILT_BANDS][QMF_NUM_FILT_BANDS];
} ia_drc_qmf_filt_struct;
typedef struct {
FLOAT32 f_cross_norm;
FLOAT32 gamma;
FLOAT32 delta;
} ia_filter_bank_params_struct;
typedef struct {
FLOAT32 s00;
FLOAT32 s01;
FLOAT32 s10;
FLOAT32 s11;
} ia_lr_filter_state_struct;
typedef struct {
FLOAT32 s0;
FLOAT32 s1;
} ia_all_pass_filter_state_struct;
typedef struct {
FLOAT32 a0;
FLOAT32 a1;
FLOAT32 a2;
FLOAT32 b0;
FLOAT32 b1;
FLOAT32 b2;
FLOAT32 x_p[MAX_CHANNEL_COUNT * 2];
FLOAT32 y_p[MAX_CHANNEL_COUNT * 2];
} ia_iir_filter_struct;
typedef struct {
ia_iir_filter_struct low_pass;
ia_iir_filter_struct high_pass;
} ia_two_band_filt_struct;
typedef struct {
ia_iir_filter_struct str_low_pass_stage_1;
ia_iir_filter_struct str_high_pass_stage_1;
ia_iir_filter_struct str_low_pass_stage_2;
ia_iir_filter_struct str_high_pass_stage_2;
ia_iir_filter_struct str_all_pass_stage_2;
} ia_three_band_filt_struct;
typedef struct {
ia_iir_filter_struct str_low_pass_stage_1;
ia_iir_filter_struct str_high_pass_stage_1;
ia_iir_filter_struct str_all_pass_stage_2_high;
ia_iir_filter_struct str_all_pass_stage_2_low;
ia_iir_filter_struct str_low_pass_stage_3_high;
ia_iir_filter_struct str_high_pass_stage_3_high;
ia_iir_filter_struct str_low_pass_stage_3_low;
ia_iir_filter_struct str_high_pass_stage_3_low;
} ia_four_band_filt_struct;
typedef struct {
ia_iir_filter_struct str_all_pass_stage;
} ia_all_pass_filter_sturct;
typedef struct {
ia_all_pass_filter_sturct
str_all_pass_cascade_filter[CASCADE_ALLPASS_COUNT_MAX];
WORD32 num_filter;
} ia_all_pass_cascade_struct;
typedef struct {
WORD32 num_bands;
WORD32 complexity;
ia_two_band_filt_struct str_two_band_bank;
ia_three_band_filt_struct str_three_band_bank;
ia_four_band_filt_struct str_four_band_bank;
ia_all_pass_cascade_struct str_all_pass_cascade;
} ia_drc_filter_bank_struct;
typedef struct {
WORD32 nfilter_banks;
WORD32 num_ph_align_ch_groups;
WORD32 complexity;
ia_drc_filter_bank_struct str_drc_filter_bank[8];
} ia_filter_banks_struct;
WORD32
impd_init_all_filter_banks(
ia_uni_drc_coeffs_struct* str_p_loc_drc_coefficients_uni_drc,
ia_drc_instructions_struct* str_drc_instruction_str,
ia_filter_banks_struct* ia_filter_banks_struct);
VOID impd_two_band_filter_process(ia_two_band_filt_struct* str_two_band_bank,
WORD32 c, WORD32 size, FLOAT32* audio_in,
FLOAT32* audio_out[]);
VOID impd_three_band_filter_process(
ia_three_band_filt_struct* str_three_band_bank, WORD32 c, WORD32 size,
FLOAT32* audio_in, FLOAT32* audio_out[]);
VOID impd_four_band_filter_process(ia_four_band_filt_struct* str_four_band_bank,
WORD32 c, WORD32 size, FLOAT32* audio_in,
FLOAT32* audio_out[]);
VOID impd_all_pass_cascade_process(
ia_all_pass_cascade_struct* str_all_pass_cascade, WORD32 c, WORD32 size,
FLOAT32* audio_in);
VOID impd_shape_filt_block_init(
ia_shape_filter_block_params_struct* pstr_shape_filter_block_params,
shape_filter_block* shape_filter_block);
VOID impd_shape_filt_block_adapt(const FLOAT32 drc_gain,
shape_filter_block* shape_filter_block);
VOID impd_shape_filt_block_time_process(shape_filter_block* shape_filter_block,
FLOAT32* drc_gain, const WORD32 channel,
FLOAT32* audio_in, WORD32 start,
WORD32 end);
#endif
|
