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 21 #ifndef _LT_PREDICT_ 22 #define _LT_PREDICT_ 23 24 #define MAX_SFB 51 25 #define MAX_LTP_SFB 40 26 27 enum { ltp_buffer_size = (4 * 1024) }; 28 29 typedef struct { 30 UWORD8 last_band; 31 UWORD8 data_present; 32 UWORD16 lag; 33 UWORD8 lag_update; 34 UWORD8 coef; 35 UWORD8 long_used[MAX_SFB]; 36 UWORD8 short_used[8]; 37 UWORD8 short_lag_present[8]; 38 UWORD8 short_lag[8]; 39 } ltp_info; 40 41 VOID ixheaacd_init_ltp_object(ltp_info *ltp); 42 43 VOID ixheaacd_lt_update_state(WORD16 *lt_pred_stat, WORD16 *time, 44 WORD32 *overlap, WORD32 frame_len, 45 WORD32 object_type, WORD32 stride, 46 WORD16 window_sequence, WORD16 *p_window_next); 47 48 VOID ixheaacd_filter_bank_ltp(ia_aac_dec_tables_struct *aac_tables_ptr, 49 WORD16 window_sequence, WORD16 win_shape, 50 WORD16 win_shape_prev, WORD32 *in_data, 51 WORD32 *out_mdct, UWORD32 object_type, 52 UWORD32 frame_len); 53 54 #endif 55