1 /****************************************************************************** 2 * * 3 * Copyright (C) 2023 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 21 #pragma once 22 23 #define IXHEAACE_HYBRID_FILTER_LENGTH (13) 24 #define IXHEAACE_QMF_BUFFER_MOVE (IXHEAACE_HYBRID_FILTER_LENGTH - 1) 25 #define IXHEAACE_HYBRID_FILTER_DELAY (6) 26 #define IXHEAACE_NUM_QMF_BANDS_IN_HYBRID (3) 27 #define IXHEAACE_NUM_HYBRID_BANDS (16) 28 29 typedef enum { 30 31 IXHEAACE_HYBRID_2_REAL = 2, 32 IXHEAACE_HYBRID_4_CPLX = 4, 33 IXHEAACE_HYBRID_8_CPLX = 8 34 35 } ixheaace_hybrid_res; 36 37 typedef struct { 38 FLOAT32 *ptr_work_real; 39 FLOAT32 *ptr_work_imag; 40 FLOAT32 **ptr_qmf_buf_real; 41 FLOAT32 **ptr_qmf_buf_imag; 42 43 } ixheaace_str_hybrid; 44 45 typedef ixheaace_str_hybrid *ixheaace_pstr_hybrid; 46 47 VOID ixheaace_hybrid_synthesis(const FLOAT32 **ptr_hybrid_real_flt, 48 const FLOAT32 **ptr_hybrid_imag_flt, FLOAT32 **ptr_qmf_real_flt, 49 FLOAT32 **ptr_qmf_imag_flt, const WORD32 *ptr_hyb_res); 50 51 IA_ERRORCODE ixheaace_hybrid_analysis(const FLOAT32 **ptr_qmf_real_in, 52 const FLOAT32 **ptr_qmf_imag_in, FLOAT32 **ptr_hyb_real_in, 53 FLOAT32 **ptr_hyb_imag_in, ixheaace_pstr_hybrid pstr_hybrid, 54 ixheaace_str_ps_tab *pstr_ps_tab, 55 ixheaace_common_tables *pstr_common_tab); 56 57 WORD32 58 ixheaace_create_hybrid_filter_bank(ixheaace_pstr_hybrid pstr_hybrid, FLOAT32 **pptr_flt); 59