From cc2160de5cc05dc3aa77f3a34358e66f6193c8c9 Mon Sep 17 00:00:00 2001 From: Michał Cichoń Date: Tue, 26 Jun 2012 20:35:30 +0200 Subject: Add support for AAC. --- faad2/src/libfaad/ps_dec.h | 152 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 152 insertions(+) create mode 100644 faad2/src/libfaad/ps_dec.h (limited to 'faad2/src/libfaad/ps_dec.h') diff --git a/faad2/src/libfaad/ps_dec.h b/faad2/src/libfaad/ps_dec.h new file mode 100644 index 0000000..6084b94 --- /dev/null +++ b/faad2/src/libfaad/ps_dec.h @@ -0,0 +1,152 @@ +/* +** FAAD2 - Freeware Advanced Audio (AAC) Decoder including SBR decoding +** Copyright (C) 2003-2005 M. Bakker, Nero AG, http://www.nero.com +** +** This program is free software; you can redistribute it and/or modify +** it under the terms of the GNU General Public License as published by +** the Free Software Foundation; either version 2 of the License, or +** (at your option) any later version. +** +** This program is distributed in the hope that it will be useful, +** but WITHOUT ANY WARRANTY; without even the implied warranty of +** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +** GNU General Public License for more details. +** +** You should have received a copy of the GNU General Public License +** along with this program; if not, write to the Free Software +** Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. +** +** Any non-GPL usage of this software or parts of this software is strictly +** forbidden. +** +** The "appropriate copyright message" mentioned in section 2c of the GPLv2 +** must read: "Code from FAAD2 is copyright (c) Nero AG, www.nero.com" +** +** Commercial non-GPL licensing of this software is possible. +** For more info contact Nero AG through Mpeg4AAClicense@nero.com. +** +** $Id: ps_dec.h,v 1.13 2009/01/26 22:32:31 menno Exp $ +**/ + +#ifndef __PS_DEC_H__ +#define __PS_DEC_H__ + +#ifdef __cplusplus +extern "C" { +#endif + +#include "bits.h" + +#define EXTENSION_ID_PS 2 + +#define MAX_PS_ENVELOPES 5 +#define NO_ALLPASS_LINKS 3 + +typedef struct +{ + /* bitstream parameters */ + uint8_t enable_iid; + uint8_t enable_icc; + uint8_t enable_ext; + + uint8_t iid_mode; + uint8_t icc_mode; + uint8_t nr_iid_par; + uint8_t nr_ipdopd_par; + uint8_t nr_icc_par; + + uint8_t frame_class; + uint8_t num_env; + + uint8_t border_position[MAX_PS_ENVELOPES+1]; + + uint8_t iid_dt[MAX_PS_ENVELOPES]; + uint8_t icc_dt[MAX_PS_ENVELOPES]; + + uint8_t enable_ipdopd; + uint8_t ipd_mode; + uint8_t ipd_dt[MAX_PS_ENVELOPES]; + uint8_t opd_dt[MAX_PS_ENVELOPES]; + + /* indices */ + int8_t iid_index_prev[34]; + int8_t icc_index_prev[34]; + int8_t ipd_index_prev[17]; + int8_t opd_index_prev[17]; + int8_t iid_index[MAX_PS_ENVELOPES][34]; + int8_t icc_index[MAX_PS_ENVELOPES][34]; + int8_t ipd_index[MAX_PS_ENVELOPES][17]; + int8_t opd_index[MAX_PS_ENVELOPES][17]; + + int8_t ipd_index_1[17]; + int8_t opd_index_1[17]; + int8_t ipd_index_2[17]; + int8_t opd_index_2[17]; + + /* ps data was correctly read */ + uint8_t ps_data_available; + + /* a header has been read */ + uint8_t header_read; + + /* hybrid filterbank parameters */ + void *hyb; + uint8_t use34hybrid_bands; + uint8_t numTimeSlotsRate; + + /**/ + uint8_t num_groups; + uint8_t num_hybrid_groups; + uint8_t nr_par_bands; + uint8_t nr_allpass_bands; + uint8_t decay_cutoff; + + uint8_t *group_border; + uint16_t *map_group2bk; + + /* filter delay handling */ + uint8_t saved_delay; + uint8_t delay_buf_index_ser[NO_ALLPASS_LINKS]; + uint8_t num_sample_delay_ser[NO_ALLPASS_LINKS]; + uint8_t delay_D[64]; + uint8_t delay_buf_index_delay[64]; + + complex_t delay_Qmf[14][64]; /* 14 samples delay max, 64 QMF channels */ + complex_t delay_SubQmf[2][32]; /* 2 samples delay max (SubQmf is always allpass filtered) */ + complex_t delay_Qmf_ser[NO_ALLPASS_LINKS][5][64]; /* 5 samples delay max (table 8.34), 64 QMF channels */ + complex_t delay_SubQmf_ser[NO_ALLPASS_LINKS][5][32]; /* 5 samples delay max (table 8.34) */ + + /* transients */ + real_t alpha_decay; + real_t alpha_smooth; + + real_t P_PeakDecayNrg[34]; + real_t P_prev[34]; + real_t P_SmoothPeakDecayDiffNrg_prev[34]; + + /* mixing and phase */ + complex_t h11_prev[50]; + complex_t h12_prev[50]; + complex_t h21_prev[50]; + complex_t h22_prev[50]; + uint8_t phase_hist; + complex_t ipd_prev[20][2]; + complex_t opd_prev[20][2]; + +} ps_info; + +/* ps_syntax.c */ +uint16_t ps_data(ps_info *ps, bitfile *ld, uint8_t *header); + +/* ps_dec.c */ +ps_info *ps_init(uint8_t sr_index, uint8_t numTimeSlotsRate); +void ps_free(ps_info *ps); + +uint8_t ps_decode(ps_info *ps, qmf_t X_left[38][64], qmf_t X_right[38][64]); + + +#ifdef __cplusplus +} +#endif +#endif + -- cgit v1.2.3