mirror of https://github.com/mpv-player/mpv
149 lines
3.9 KiB
C
149 lines
3.9 KiB
C
/*
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** FAAD2 - Freeware Advanced Audio (AAC) Decoder including SBR decoding
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** Copyright (C) 2003-2004 M. Bakker, Ahead Software AG, http://www.nero.com
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**
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** This program is free software; you can redistribute it and/or modify
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** it under the terms of the GNU General Public License as published by
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** the Free Software Foundation; either version 2 of the License, or
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** (at your option) any later version.
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**
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** This program is distributed in the hope that it will be useful,
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** but WITHOUT ANY WARRANTY; without even the implied warranty of
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** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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** GNU General Public License for more details.
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**
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** You should have received a copy of the GNU General Public License
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** along with this program; if not, write to the Free Software
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** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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**
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** Any non-GPL usage of this software or parts of this software is strictly
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** forbidden.
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**
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** Commercial non-GPL licensing of this software is possible.
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** For more info contact Ahead Software through Mpeg4AAClicense@nero.com.
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**
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** $Id: ps_dec.h,v 1.8 2004/09/04 14:56:28 menno Exp $
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**/
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#ifndef __PS_DEC_H__
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#define __PS_DEC_H__
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include "bits.h"
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#define EXTENSION_ID_PS 2
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#define MAX_PS_ENVELOPES 5
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#define NO_ALLPASS_LINKS 3
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typedef struct
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{
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/* bitstream parameters */
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uint8_t enable_iid;
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uint8_t enable_icc;
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uint8_t enable_ext;
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uint8_t iid_mode;
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uint8_t icc_mode;
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uint8_t nr_iid_par;
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uint8_t nr_ipdopd_par;
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uint8_t nr_icc_par;
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uint8_t frame_class;
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uint8_t num_env;
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uint8_t border_position[MAX_PS_ENVELOPES+1];
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uint8_t iid_dt[MAX_PS_ENVELOPES];
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uint8_t icc_dt[MAX_PS_ENVELOPES];
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uint8_t enable_ipdopd;
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uint8_t ipd_mode;
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uint8_t ipd_dt[MAX_PS_ENVELOPES];
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uint8_t opd_dt[MAX_PS_ENVELOPES];
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/* indices */
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int8_t iid_index_prev[34];
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int8_t icc_index_prev[34];
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int8_t ipd_index_prev[17];
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int8_t opd_index_prev[17];
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int8_t iid_index[MAX_PS_ENVELOPES][34];
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int8_t icc_index[MAX_PS_ENVELOPES][34];
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int8_t ipd_index[MAX_PS_ENVELOPES][17];
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int8_t opd_index[MAX_PS_ENVELOPES][17];
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int8_t ipd_index_1[17];
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int8_t opd_index_1[17];
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int8_t ipd_index_2[17];
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int8_t opd_index_2[17];
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/* ps data was correctly read */
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uint8_t ps_data_available;
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/* a header has been read */
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uint8_t header_read;
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/* hybrid filterbank parameters */
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void *hyb;
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uint8_t use34hybrid_bands;
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/**/
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uint8_t num_groups;
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uint8_t num_hybrid_groups;
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uint8_t nr_par_bands;
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uint8_t nr_allpass_bands;
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uint8_t decay_cutoff;
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uint8_t *group_border;
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uint16_t *map_group2bk;
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/* filter delay handling */
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uint8_t saved_delay;
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uint8_t delay_buf_index_ser[NO_ALLPASS_LINKS];
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uint8_t num_sample_delay_ser[NO_ALLPASS_LINKS];
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uint8_t delay_D[64];
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uint8_t delay_buf_index_delay[64];
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complex_t delay_Qmf[14][64]; /* 14 samples delay max, 64 QMF channels */
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complex_t delay_SubQmf[2][32]; /* 2 samples delay max (SubQmf is always allpass filtered) */
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complex_t delay_Qmf_ser[NO_ALLPASS_LINKS][5][64]; /* 5 samples delay max (table 8.34), 64 QMF channels */
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complex_t delay_SubQmf_ser[NO_ALLPASS_LINKS][5][32]; /* 5 samples delay max (table 8.34) */
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/* transients */
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real_t alpha_decay;
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real_t alpha_smooth;
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real_t P_PeakDecayNrg[34];
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real_t P_prev[34];
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real_t P_SmoothPeakDecayDiffNrg_prev[34];
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/* mixing and phase */
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complex_t h11_prev[50];
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complex_t h12_prev[50];
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complex_t h21_prev[50];
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complex_t h22_prev[50];
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uint8_t phase_hist;
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complex_t ipd_prev[20][2];
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complex_t opd_prev[20][2];
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} ps_info;
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/* ps_syntax.c */
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uint16_t ps_data(ps_info *ps, bitfile *ld, uint8_t *header);
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/* ps_dec.c */
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ps_info *ps_init(uint8_t sr_index);
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void ps_free(ps_info *ps);
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uint8_t ps_decode(ps_info *ps, qmf_t X_left[38][64], qmf_t X_right[38][64]);
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#ifdef __cplusplus
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}
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#endif
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#endif
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