61 lines
2.1 KiB
C
61 lines
2.1 KiB
C
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/******************************************************************************
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* *
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* Copyright (C) 2018 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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*****************************************************************************
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* Originally developed and contributed by Ittiam Systems Pvt. Ltd, Bangalore
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*/
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#ifndef _LT_PREDICT_
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#define _LT_PREDICT_
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#define MAX_SFB 51
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#define MAX_LTP_SFB 40
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#define MAX_LTP_SFB_SR_FIVE_PLUS_480 31
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#define MAX_LTP_SFB_SR_FIVE_480 38
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#define MAX_LTP_SFB_SR_FIVE_LESS_480 36
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#define MAX_LTP_SFB_SR_FIVE_PLUS_512 32
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#define MAX_LTP_SFB_SR_FIVE_512 38
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#define MAX_LTP_SFB_SR_FIVE_LESS_512 37
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enum { ltp_buffer_size = (4 * 1024) };
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typedef struct {
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UWORD8 last_band;
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UWORD8 data_present;
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UWORD16 lag;
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UWORD8 lag_update;
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UWORD8 coef;
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UWORD8 long_used[MAX_SFB];
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UWORD8 short_used[8];
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UWORD8 short_lag_present[8];
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UWORD8 short_lag[8];
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} ltp_info;
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VOID ixheaacd_init_ltp_object(ltp_info *ltp);
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VOID ixheaacd_lt_update_state(WORD16 *lt_pred_stat, WORD16 *time,
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WORD32 *overlap, WORD32 frame_len,
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WORD32 object_type, WORD32 stride,
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WORD16 window_sequence, WORD16 *p_window_next);
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VOID ixheaacd_filter_bank_ltp(ia_aac_dec_tables_struct *aac_tables_ptr,
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WORD16 window_sequence, WORD16 win_shape,
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WORD16 win_shape_prev, WORD32 *in_data,
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WORD32 *out_mdct, UWORD32 object_type,
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UWORD32 frame_len);
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#endif
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