| /****************************************************************************** |
| * |
| * 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_EQ_H |
| #define IMPD_DRC_EQ_H |
| |
| #ifndef COMPILE_FOR_DRC_ENCODER |
| #endif |
| |
| #define EQ_CHANNEL_COUNT_MAX 8 |
| #define EQ_FIR_FILTER_SIZE_MAX 128 |
| #define EQ_SUBBAND_COUNT_MAX 256 |
| #define EQ_INTERMEDIATE_2ND_ORDER_PARAMS_COUNT_MAX 32 |
| #define EQ_INTERMEDIATE_PARAMETER_COUNT_MAX 32 |
| #define EQ_FILTER_SECTION_COUNT_MAX 8 |
| #define EQ_FILTER_ELEMENT_COUNT_MAX 4 |
| #define EQ_FILTER_COUNT_MAX 4 |
| #define MATCHING_PHASE_FILTER_COUNT_MAX 32 |
| |
| #define EQ_FILTER_DOMAIN_NONE 0 |
| #define EQ_FILTER_DOMAIN_TIME (1 << 0) |
| #define EQ_FILTER_DOMAIN_SUBBAND (1 << 1) |
| |
| #define EQ_REAL_ZERO_CNT 63 /*Max Value of a 6 bit number*/ |
| #define EQ_GENERIC_ZERO_CNT 63 /*Max Value of a 6 bit number*/ |
| #define EQ_AUDIO_DELAY_MAX (EQ_REAL_ZERO_CNT + (EQ_GENERIC_ZERO_CNT * 2)) |
| |
| #ifdef __cplusplus |
| extern "C" { |
| #endif |
| |
| typedef struct { |
| WORD32 delay; |
| FLOAT32 state[EQ_CHANNEL_COUNT_MAX][EQ_AUDIO_DELAY_MAX]; |
| } ia_audio_delay_struct; |
| |
| typedef struct { |
| FLOAT32 radius; |
| FLOAT32 coeff[2]; |
| } ia_2nd_order_filt_params_struct; |
| |
| typedef struct { |
| WORD32 coeff_count; |
| FLOAT32 coeff[EQ_FIR_FILTER_SIZE_MAX]; |
| FLOAT32 state[EQ_CHANNEL_COUNT_MAX][EQ_FIR_FILTER_SIZE_MAX]; |
| } ia_fir_filter_struct; |
| |
| typedef struct { |
| WORD32 eq_frame_size_subband; |
| WORD32 coeff_count; |
| FLOAT32 subband_coeff[EQ_SUBBAND_COUNT_MAX]; |
| } ia_subband_filt_struct; |
| |
| typedef struct { |
| WORD32 filter_format; |
| WORD32 filter_param_count_of_zeros; |
| ia_2nd_order_filt_params_struct |
| ord_2_filt_params_of_zeros[EQ_INTERMEDIATE_2ND_ORDER_PARAMS_COUNT_MAX]; |
| WORD32 filter_param_count_of_poles; |
| ia_2nd_order_filt_params_struct |
| ord_2_filt_params_of_poles[EQ_INTERMEDIATE_2ND_ORDER_PARAMS_COUNT_MAX]; |
| WORD32 filter_param_count_of_fir; |
| ia_fir_filter_struct fir_filter; |
| } ia_interm_filt_params_struct; |
| |
| typedef struct { |
| WORD32 interm_filt_param_count; |
| ia_interm_filt_params_struct |
| interm_filt_params[EQ_INTERMEDIATE_PARAMETER_COUNT_MAX]; |
| } IntermediateParams; |
| |
| typedef struct { |
| FLOAT32 in_state_1; |
| FLOAT32 in_state_2; |
| FLOAT32 out_state_1; |
| FLOAT32 out_state_2; |
| } ia_filt_sect_state_struct; |
| |
| typedef struct { |
| FLOAT32 a1; |
| FLOAT32 a2; |
| FLOAT32 b1; |
| FLOAT32 b2; |
| ia_filt_sect_state_struct filt_sect_state[EQ_CHANNEL_COUNT_MAX]; |
| } ia_filt_sect_struct; |
| |
| typedef struct { |
| WORD32 member_count; |
| WORD32 member_idx[EQ_CHANNEL_GROUP_COUNT_MAX]; |
| } ia_cascade_align_group_struct; |
| |
| typedef struct { |
| WORD32 validity_flag; |
| WORD32 num_matches_filter; |
| WORD32 matches_filter[EQ_FILTER_SECTION_COUNT_MAX]; |
| FLOAT32 gain; |
| WORD32 section_count; |
| ia_filt_sect_struct filt_section[EQ_FILTER_SECTION_COUNT_MAX]; |
| ia_audio_delay_struct audio_delay; |
| } ia_ph_alignment_filt_struct; |
| |
| typedef ia_ph_alignment_filt_struct ia_matching_ph_filt_struct; |
| |
| typedef struct { |
| WORD32 matches_cascade_idx; |
| WORD32 all_pass_count; |
| ia_matching_ph_filt_struct matching_ph_filt[MATCHING_PHASE_FILTER_COUNT_MAX]; |
| } ia_all_pass_chain_struct; |
| |
| typedef struct { |
| WORD32 section_count; |
| ia_filt_sect_struct filt_section[EQ_FILTER_SECTION_COUNT_MAX]; |
| WORD32 filt_coeffs_flag; |
| ia_fir_filter_struct fir_filter; |
| ia_audio_delay_struct audio_delay; |
| } ia_pole_zero_filt_struct; |
| |
| typedef struct { |
| FLOAT32 elementGainLinear; |
| WORD32 format; |
| ia_pole_zero_filt_struct pstr_pole_zero_filt; |
| ia_fir_filter_struct fir_filter; |
| WORD32 num_ph_align_filt; |
| ia_ph_alignment_filt_struct ph_alignment_filt[EQ_FILTER_ELEMENT_COUNT_MAX]; |
| } ia_eq_filt_ele_struct; |
| |
| typedef struct { |
| WORD32 element_count; |
| ia_eq_filt_ele_struct eq_filt_element[EQ_FILTER_ELEMENT_COUNT_MAX]; |
| ia_matching_ph_filt_struct matching_ph_filt_ele_0; |
| } ia_eq_filt_block_struct; |
| |
| typedef struct { |
| FLOAT32 cascade_gain_linear; |
| WORD32 block_count; |
| ia_eq_filt_block_struct pstr_eq_filt_block[EQ_FILTER_BLOCK_COUNT_MAX]; |
| WORD32 num_ph_align_filt; |
| ia_ph_alignment_filt_struct |
| ph_alignment_filt[EQ_FILTER_BLOCK_COUNT_MAX * EQ_FILTER_BLOCK_COUNT_MAX]; |
| } ia_filt_cascade_td_struct; |
| |
| typedef struct { |
| WORD32 domain; |
| WORD32 audio_num_chan; |
| WORD32 eq_ch_group_count; |
| WORD32 eq_ch_group_of_channel[EQ_CHANNEL_COUNT_MAX]; |
| ia_filt_cascade_td_struct filt_cascade_td[EQ_CHANNEL_GROUP_COUNT_MAX]; |
| ia_subband_filt_struct subband_filt[EQ_CHANNEL_GROUP_COUNT_MAX]; |
| } ia_eq_set_struct; |
| |
| WORD32 |
| impd_derive_eq_set(ia_eq_coeff_struct* str_eq_coeff, |
| ia_eq_instructions_struct* str_eq_instructions, |
| FLOAT32 sample_rate, WORD32 drc_frame_size, |
| WORD32 sub_band_domain_mode, ia_eq_set_struct* eq_set); |
| |
| VOID impd_get_eq_set_delay(ia_eq_set_struct* eq_set, WORD32* cascade_delay); |
| WORD32 |
| impd_process_eq_set_td(ia_eq_set_struct* eq_set, WORD32 channel, |
| FLOAT32 audio_in, FLOAT32* audio_out); |
| |
| WORD32 impd_process_eq_set_time_domain(ia_eq_set_struct* eq_set, WORD32 channel, |
| FLOAT32* audio_in, FLOAT32* audio_out, |
| WORD32 frame_size); |
| #ifdef __cplusplus |
| } |
| #endif |
| #endif |