88 lines
3.4 KiB
C
88 lines
3.4 KiB
C
/******************************************************************************
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* *
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* Copyright (C) 2023 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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#pragma once
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#define LN (2048)
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#define SN (256)
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#define LN2 (LN / 2)
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#define NSHORT (LN / SN)
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#define TNS_MAX_ORDER 31
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#define DEF_TNS_GAIN_THRESH 1.41
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#define DEF_TNS_COEFF_THRESH 0.1
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#define DEF_TNS_RES_OFFSET 3
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#ifndef PI
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#define PI 3.14159265358979323846
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#endif
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typedef struct {
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WORD32 order; /**< Filter order */
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WORD32 direction; /**< Filtering direction */
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WORD32 coef_compress; /**< Are coeffs compressed? */
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WORD32 length; /**< Length, in bands */
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FLOAT64 a_coeffs[TNS_MAX_ORDER + 1]; /**< AR Coefficients */
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FLOAT64 k_coeffs[TNS_MAX_ORDER + 1]; /**< Reflection Coefficients */
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WORD32 index[TNS_MAX_ORDER + 1]; /**< Coefficient indices */
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} ia_tns_filter_data;
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typedef struct {
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WORD32 n_filt; /**< number of filters */
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WORD32 coef_res; /**< Coefficient resolution */
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ia_tns_filter_data tns_filter[3]; /**< TNS filters */
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FLOAT64 tns_pred_gain;
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WORD32 tns_active;
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} ia_tns_window_data;
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typedef struct {
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WORD32 tns_data_present;
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WORD32 tns_min_band_number_long;
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WORD32 tns_min_band_number_short;
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WORD32 tns_max_bands_long;
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WORD32 tns_max_bands_short;
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WORD32 tns_max_order_long;
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WORD32 tns_max_order_short;
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WORD32 lpc_start_band_long;
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WORD32 lpc_start_band_short;
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WORD32 lpc_stop_band_long;
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WORD32 lpc_stop_band_short;
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ia_tns_window_data window_data[NSHORT]; /**< TNS data per window */
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WORD32 *sfb_offset_table_short; /**< Scalefactor band offset table */
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WORD32 *sfb_offset_table_short_tcx; /**< Scalefactor band offset table */
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WORD32 *sfb_offset_table_long; /**< Scalefactor band offset table */
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WORD32 max_sfb_short; /**< max_sfb */
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WORD32 max_sfb_long; /**< max_sfb */
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FLOAT32 threshold;
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FLOAT32 tns_time_res_short;
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FLOAT32 tns_time_res_long;
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FLOAT64 win_short[8];
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FLOAT64 win_long[16];
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WORD32 block_type; /**< block type */
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WORD32 number_of_bands; /**< number of bands per window */
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FLOAT64 *spec; /**< Spectral data array */
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} ia_tns_info;
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IA_ERRORCODE iusace_tns_init(WORD32 sampling_rate, WORD32 bit_rate, ia_tns_info *pstr_tns_info,
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WORD32 num_channels);
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VOID iusace_tns_encode(ia_tns_info *pstr_tns_info_ch2, ia_tns_info *pstr_tns_info,
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FLOAT32 *ptr_sfb_energy, WORD32 w, WORD32 i_ch, WORD32 low_pass_line,
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FLOAT64 *ptr_scratch_tns_filter, WORD32 core_mode,
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FLOAT64 *ptr_tns_scratch);
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