1/*
2 * MPEG-4 Parametric Stereo definitions and declarations
3 * Copyright (c) 2010 Alex Converse <alex.converse@gmail.com>
4 *
5 * This file is part of Libav.
6 *
7 * Libav is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
11 *
12 * Libav is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with Libav; if not, write to the Free Software
19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22#ifndef AVCODEC_PS_H
23#define AVCODEC_PS_H
24
25#include <stdint.h>
26
27#include "avcodec.h"
28#include "get_bits.h"
29
30#define PS_MAX_NUM_ENV 5
31#define PS_MAX_NR_IIDICC 34
32#define PS_MAX_NR_IPDOPD 17
33#define PS_MAX_SSB 91
34#define PS_MAX_AP_BANDS 50
35#define PS_QMF_TIME_SLOTS 32
36#define PS_MAX_DELAY 14
37#define PS_AP_LINKS 3
38#define PS_MAX_AP_DELAY 5
39
40typedef struct {
41    int    start;
42    int    enable_iid;
43    int    iid_quant;
44    int    nr_iid_par;
45    int    nr_ipdopd_par;
46    int    enable_icc;
47    int    icc_mode;
48    int    nr_icc_par;
49    int    enable_ext;
50    int    frame_class;
51    int    num_env_old;
52    int    num_env;
53    int    enable_ipdopd;
54    int    border_position[PS_MAX_NUM_ENV+1];
55    int8_t iid_par[PS_MAX_NUM_ENV][PS_MAX_NR_IIDICC]; ///< Inter-channel Intensity Difference Parameters
56    int8_t icc_par[PS_MAX_NUM_ENV][PS_MAX_NR_IIDICC]; ///< Inter-Channel Coherence Parameters
57    /* ipd/opd is iid/icc sized so that the same functions can handle both */
58    int8_t ipd_par[PS_MAX_NUM_ENV][PS_MAX_NR_IIDICC]; ///< Inter-channel Phase Difference Parameters
59    int8_t opd_par[PS_MAX_NUM_ENV][PS_MAX_NR_IIDICC]; ///< Overall Phase Difference Parameters
60    int    is34bands;
61    int    is34bands_old;
62
63    float  in_buf[5][44][2];
64    float  delay[PS_MAX_SSB][PS_QMF_TIME_SLOTS + PS_MAX_DELAY][2];
65    float  ap_delay[PS_MAX_AP_BANDS][PS_AP_LINKS][PS_QMF_TIME_SLOTS + PS_MAX_AP_DELAY][2];
66    float  peak_decay_nrg[34];
67    float  power_smooth[34];
68    float  peak_decay_diff_smooth[34];
69    float  H11[2][PS_MAX_NUM_ENV+1][PS_MAX_NR_IIDICC];
70    float  H12[2][PS_MAX_NUM_ENV+1][PS_MAX_NR_IIDICC];
71    float  H21[2][PS_MAX_NUM_ENV+1][PS_MAX_NR_IIDICC];
72    float  H22[2][PS_MAX_NUM_ENV+1][PS_MAX_NR_IIDICC];
73    int8_t opd_hist[PS_MAX_NR_IIDICC];
74    int8_t ipd_hist[PS_MAX_NR_IIDICC];
75} PSContext;
76
77void ff_ps_init(void);
78void ff_ps_ctx_init(PSContext *ps);
79int ff_ps_read_data(AVCodecContext *avctx, GetBitContext *gb, PSContext *ps, int bits_left);
80int ff_ps_apply(AVCodecContext *avctx, PSContext *ps, float L[2][38][64], float R[2][38][64], int top);
81
82#endif /* AVCODEC_PS_H */
83