ps_dec.h
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- /*
- ** FAAD2 - Freeware Advanced Audio (AAC) Decoder including SBR decoding
- ** Copyright (C) 2003-2005 M. Bakker, Ahead Software 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.
- **
- ** Software using this code must display the following message visibly in the
- ** software:
- ** "FAAD2 AAC/HE-AAC/HE-AACv2/DRM decoder (c) Ahead Software, www.nero.com"
- ** in, for example, the about-box or help/startup screen.
- **
- ** Commercial non-GPL licensing of this software is possible.
- ** For more info contact Ahead Software through Mpeg4AAClicense@nero.com.
- **
- ** $Id: ps_dec.h,v 1.2 2005/11/01 21:41:43 gabest 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 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);
- 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