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aacps.h
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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 FFmpeg.
6  *
7  * FFmpeg 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  * FFmpeg 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 FFmpeg; 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 "aacpsdsp.h"
28 #include "avcodec.h"
29 #include "get_bits.h"
30 
31 #define PS_MAX_NUM_ENV 5
32 #define PS_MAX_NR_IIDICC 34
33 #define PS_MAX_NR_IPDOPD 17
34 #define PS_MAX_SSB 91
35 #define PS_MAX_AP_BANDS 50
36 #define PS_QMF_TIME_SLOTS 32
37 #define PS_MAX_DELAY 14
38 #define PS_AP_LINKS 3
39 #define PS_MAX_AP_DELAY 5
40 
41 typedef struct PSContext {
42  int start;
43  int enable_iid;
44  int iid_quant;
45  int nr_iid_par;
46  int nr_ipdopd_par;
47  int enable_icc;
48  int icc_mode;
49  int nr_icc_par;
50  int enable_ext;
51  int frame_class;
52  int num_env_old;
53  int num_env;
54  int enable_ipdopd;
55  int border_position[PS_MAX_NUM_ENV+1];
56  int8_t iid_par[PS_MAX_NUM_ENV][PS_MAX_NR_IIDICC]; ///< Inter-channel Intensity Difference Parameters
57  int8_t icc_par[PS_MAX_NUM_ENV][PS_MAX_NR_IIDICC]; ///< Inter-Channel Coherence Parameters
58  /* ipd/opd is iid/icc sized so that the same functions can handle both */
59  int8_t ipd_par[PS_MAX_NUM_ENV][PS_MAX_NR_IIDICC]; ///< Inter-channel Phase Difference Parameters
60  int8_t opd_par[PS_MAX_NUM_ENV][PS_MAX_NR_IIDICC]; ///< Overall Phase Difference Parameters
61  int is34bands;
62  int is34bands_old;
63 
64  DECLARE_ALIGNED(16, float, in_buf)[5][44][2];
65  DECLARE_ALIGNED(16, float, delay)[PS_MAX_SSB][PS_QMF_TIME_SLOTS + PS_MAX_DELAY][2];
66  DECLARE_ALIGNED(16, float, ap_delay)[PS_MAX_AP_BANDS][PS_AP_LINKS][PS_QMF_TIME_SLOTS + PS_MAX_AP_DELAY][2];
67  DECLARE_ALIGNED(16, float, peak_decay_nrg)[34];
68  DECLARE_ALIGNED(16, float, power_smooth)[34];
69  DECLARE_ALIGNED(16, float, peak_decay_diff_smooth)[34];
70  DECLARE_ALIGNED(16, float, H11)[2][PS_MAX_NUM_ENV+1][PS_MAX_NR_IIDICC];
71  DECLARE_ALIGNED(16, float, H12)[2][PS_MAX_NUM_ENV+1][PS_MAX_NR_IIDICC];
72  DECLARE_ALIGNED(16, float, H21)[2][PS_MAX_NUM_ENV+1][PS_MAX_NR_IIDICC];
73  DECLARE_ALIGNED(16, float, H22)[2][PS_MAX_NUM_ENV+1][PS_MAX_NR_IIDICC];
74  DECLARE_ALIGNED(16, float, Lbuf)[91][32][2];
75  DECLARE_ALIGNED(16, float, Rbuf)[91][32][2];
76  int8_t opd_hist[PS_MAX_NR_IIDICC];
77  int8_t ipd_hist[PS_MAX_NR_IIDICC];
78  PSDSPContext dsp;
79 } PSContext;
80 
81 void ff_ps_init(void);
82 void ff_ps_ctx_init(PSContext *ps);
83 int ff_ps_read_data(AVCodecContext *avctx, GetBitContext *gb, PSContext *ps, int bits_left);
84 int ff_ps_apply(AVCodecContext *avctx, PSContext *ps, float L[2][38][64], float R[2][38][64], int top);
85 
86 #endif /* AVCODEC_PS_H */
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