/[pcsx2_0.9.7]/trunk/3rdparty/liba52/a52_internal.h
ViewVC logotype

Annotation of /trunk/3rdparty/liba52/a52_internal.h

Parent Directory Parent Directory | Revision Log Revision Log


Revision 8 - (hide annotations) (download)
Mon Sep 6 11:19:43 2010 UTC (9 years, 9 months ago) by william
File MIME type: text/plain
File size: 4447 byte(s)
Exported ./upsream/trunk @r3730 from http://pcsx2.googlecode.com/svn/trunk/
1 william 8 /*
2     * a52_internal.h
3     * Copyright (C) 2000-2002 Michel Lespinasse <walken@zoy.org>
4     * Copyright (C) 1999-2000 Aaron Holtzman <aholtzma@ess.engr.uvic.ca>
5     *
6     * This file is part of a52dec, a free ATSC A-52 stream decoder.
7     * See http://liba52.sourceforge.net/ for updates.
8     *
9     * a52dec is free software; you can redistribute it and/or modify
10     * it under the terms of the GNU General Public License as published by
11     * the Free Software Foundation; either version 2 of the License, or
12     * (at your option) any later version.
13     *
14     * a52dec is distributed in the hope that it will be useful,
15     * but WITHOUT ANY WARRANTY; without even the implied warranty of
16     * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17     * GNU General Public License for more details.
18     *
19     * You should have received a copy of the GNU General Public License
20     * along with this program; if not, write to the Free Software
21     * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
22     */
23    
24     typedef struct {
25     uint8_t bai; /* fine SNR offset, fast gain */
26     uint8_t deltbae; /* delta bit allocation exists */
27     int8_t deltba[50]; /* per-band delta bit allocation */
28     } ba_t;
29    
30     typedef struct {
31     uint8_t exp[256]; /* decoded channel exponents */
32     int8_t bap[256]; /* derived channel bit allocation */
33     } expbap_t;
34    
35     struct a52_state_s {
36     uint8_t fscod; /* sample rate */
37     uint8_t halfrate; /* halfrate factor */
38     uint8_t acmod; /* coded channels */
39     uint8_t lfeon; /* coded lfe channel */
40     sample_t clev; /* centre channel mix level */
41     sample_t slev; /* surround channels mix level */
42    
43     int output; /* type of output */
44     sample_t level; /* output level */
45     sample_t bias; /* output bias */
46    
47     int dynrnge; /* apply dynamic range */
48     sample_t dynrng; /* dynamic range */
49     void * dynrngdata; /* dynamic range callback funtion and data */
50     sample_t (* dynrngcall) (sample_t range, void * dynrngdata);
51    
52     uint8_t chincpl; /* channel coupled */
53     uint8_t phsflginu; /* phase flags in use (stereo only) */
54     uint8_t cplstrtmant; /* coupling channel start mantissa */
55     uint8_t cplendmant; /* coupling channel end mantissa */
56     uint32_t cplbndstrc; /* coupling band structure */
57     sample_t cplco[5][18]; /* coupling coordinates */
58    
59     /* derived information */
60     uint8_t cplstrtbnd; /* coupling start band (for bit allocation) */
61     uint8_t ncplbnd; /* number of coupling bands */
62    
63     uint8_t rematflg; /* stereo rematrixing */
64    
65     uint8_t endmant[5]; /* channel end mantissa */
66    
67     uint16_t bai; /* bit allocation information */
68    
69     uint32_t * buffer_start;
70     uint16_t lfsr_state; /* dither state */
71     uint32_t bits_left;
72     uint32_t current_word;
73    
74     uint8_t csnroffst; /* coarse SNR offset */
75     ba_t cplba; /* coupling bit allocation parameters */
76     ba_t ba[5]; /* channel bit allocation parameters */
77     ba_t lfeba; /* lfe bit allocation parameters */
78    
79     uint8_t cplfleak; /* coupling fast leak init */
80     uint8_t cplsleak; /* coupling slow leak init */
81    
82     expbap_t cpl_expbap;
83     expbap_t fbw_expbap[5];
84     expbap_t lfe_expbap;
85    
86     sample_t * samples;
87     int downmixed;
88     };
89    
90     // [Air]: Added sample_t casts here.
91     // Improves SSE2 optimization efficiency under Visual Studio 2008
92    
93     #define LEVEL_PLUS6DB ((sample_t)2.0)
94     #define LEVEL_PLUS3DB ((sample_t)1.4142135623730951)
95     #define LEVEL_3DB ((sample_t)0.7071067811865476)
96     #define LEVEL_45DB ((sample_t)0.5946035575013605)
97     #define LEVEL_6DB ((sample_t)0.5)
98    
99     #define EXP_REUSE (0)
100     #define EXP_D15 (1)
101     #define EXP_D25 (2)
102     #define EXP_D45 (3)
103    
104     #define DELTA_BIT_REUSE (0)
105     #define DELTA_BIT_NEW (1)
106     #define DELTA_BIT_NONE (2)
107     #define DELTA_BIT_RESERVED (3)
108    
109     void a52_bit_allocate (a52_state_t * state, ba_t * ba, int bndstart,
110     int start, int end, int fastleak, int slowleak,
111     expbap_t * expbap);
112    
113     int a52_downmix_init (int input, int flags, sample_t * level,
114     sample_t clev, sample_t slev);
115     int a52_downmix_coeff (sample_t * coeff, int acmod, int output, sample_t level,
116     sample_t clev, sample_t slev);
117     void a52_downmix (sample_t * samples, int acmod, int output, sample_t bias,
118     sample_t clev, sample_t slev);
119     void a52_upmix (sample_t * samples, int acmod, int output);
120    
121     void a52_imdct_init (uint32_t mm_accel);
122     void a52_imdct_256 (sample_t * data, sample_t * delay, sample_t bias);
123     void a52_imdct_512 (sample_t * data, sample_t * delay, sample_t bias);

  ViewVC Help
Powered by ViewVC 1.1.22