1 /******************************************************************************
2  *
3  * Copyright (C) 2018 The Android Open Source Project
4  *
5  * Licensed under the Apache License, Version 2.0 (the "License");
6  * you may not use this file except in compliance with the License.
7  * You may obtain a copy of the License at:
8  *
9  * http://www.apache.org/licenses/LICENSE-2.0
10  *
11  * Unless required by applicable law or agreed to in writing, software
12  * distributed under the License is distributed on an "AS IS" BASIS,
13  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14  * See the License for the specific language governing permissions and
15  * limitations under the License.
16  *
17  *****************************************************************************
18  * Originally developed and contributed by Ittiam Systems Pvt. Ltd, Bangalore
19 */
20 #ifndef IMPD_DRC_MULTI_BAND_H
21 #define IMPD_DRC_MULTI_BAND_H
22 
23 #define DRC_SUBBAND_COUNT_WITH_AUDIO_CODEC_FILTERBANK_MAX \
24   FILTER_BANK_PARAMETER_COUNT
25 
26 #ifdef __cplusplus
27 extern "C" {
28 #endif
29 
30 typedef struct {
31   FLOAT32 overlap_weight[AUDIO_CODEC_SUBBAND_COUNT_MAX];
32 } ia_band_overlap_params_struct;
33 
34 typedef struct {
35   ia_band_overlap_params_struct str_band_overlap_params[BAND_COUNT_MAX];
36 } ia_group_overlap_params_struct;
37 
38 typedef struct {
39   ia_group_overlap_params_struct
40       str_group_overlap_params[CHANNEL_GROUP_COUNT_MAX];
41 } ia_overlap_params_struct;
42 
43 WORD32
44 impd_fcenter_norm_sb_init(WORD32 num_subbands, FLOAT32* fcenter_norm_subband);
45 
46 WORD32
47 impd_generate_slope(WORD32 num_subbands, FLOAT32* fcenter_norm_subband,
48                     FLOAT32 fcross_norm_lo, FLOAT32 fcross_norm_hi,
49                     FLOAT32* response);
50 
51 WORD32
52 impd_generate_overlap_weights(
53     WORD32 num_drc_bands, WORD32 drc_band_type,
54     ia_gain_params_struct* gain_params, WORD32 dec_subband_count,
55     ia_group_overlap_params_struct* pstr_group_overlap_params);
56 
57 WORD32
58 impd_init_overlap_weight(
59     ia_uni_drc_coeffs_struct* str_p_loc_drc_coefficients_uni_drc,
60     ia_drc_instructions_struct* str_drc_instruction_str,
61     WORD32 sub_band_domain_mode, ia_overlap_params_struct* pstr_overlap_params);
62 
63 #ifdef __cplusplus
64 }
65 #endif
66 #endif
67