/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* AV parser inteface declarations
*
* Copyright (c) 2007 Michael Sevakis
*
* 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 software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#ifndef PARSER_H
#define PARSER_H
enum stream_formats
{
STREAM_FMT_UNKNOWN = -1,
STREAM_FMT_MPEG_TS, /* MPEG transport stream */
STREAM_FMT_MPEG_PS, /* MPEG program stream */
STREAM_FMT_MPV, /* MPEG Video only (1 or 2) */
STREAM_FMT_MPA, /* MPEG Audio only */
};
/* Structure used by a thread that handles a single demuxed data stream and
* receives commands from the stream manager */
enum stream_parse_states
{
/* Stream is... */
SSTATE_SYNC, /* synchronizing by trying to find a start code */
SSTATE_PARSE, /* parsing the stream looking for packets */
SSTATE_END, /* at the end of data */
};
enum stream_parse_mode
{
STREAM_PM_STREAMING = 0, /* Next packet when streaming */
STREAM_PM_RANDOM_ACCESS, /* Random-access parsing */
};
enum stream_parser_flags
{
STREAMF_CAN_SEEK = 0x1, /* Seeking possible for this stream */
};
struct stream_parser
{
/* Common generic parser data */
enum stream_formats format; /* Stream format */
uint32_t start_pts; /* The movie start time as represented by
the first audio PTS tag in the
stream converted to half minutes */
uint32_t end_pts; /* The movie end time as represented by
the maximum audio PTS tag in the
stream converted to half minutes */
uint32_t duration; /* Duration in PTS units */
unsigned flags; /* Various attributes set at init */
struct vo_ext dims; /* Movie dimensions in pixels */
uint32_t last_seek_time;
int (*next_data)(struct stream *str, enum stream_parse_mode type);
union /* A place for reusable no-cache parameters */
{
struct str_sync_data sd;
} parms;
};
extern struct stream_parser str_parser;
/* MPEG parsing */
uint8_t * mpeg_parser_scan_start_code(struct stream_scan *sk, uint32_t code);
unsigned mpeg_parser_scan_pes(struct stream_scan *sk);
uint32_t mpeg_parser_scan_scr(struct stream_scan *sk);
uint32_t mpeg_parser_scan_pts(struct stream_scan *sk, unsigned id);
off_t mpeg_stream_stream_seek_PTS(uint32_t time, int id);
/* General parsing */
bool parser_init(void);
void str_initialize(struct stream *str, off_t pos);
intptr_t parser_send_video_msg(long id, intptr_t data);
bool parser_get_video_size(struct vo_ext *sz);
int parser_init_stream(void);
void parser_close_stream(void);
static inline bool parser_can_seek(void)
{ return str_parser.flags & STREAMF_CAN_SEEK; }
uint32_t parser_seek_time(uint32_t time);
void parser_prepare_streaming(void);
void str_end_of_stream(struct stream *str);
static inline int parser_get_next_data(struct stream *str,
enum stream_parse_mode type)
{ return str_parser.next_data(str, type); }
#endif /* PARSER_H */
d='n24' href='#n24'>24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
/*
** FAAD2 - Freeware Advanced Audio (AAC) Decoder including SBR decoding
** Copyright (C) 2003-2004 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.
**
** Commercial non-GPL licensing of this software is possible.
** For more info contact Ahead Software through Mpeg4AAClicense@nero.com.
**
** $Id$
**/
#include "common.h"
#include "structs.h"
#include <stdlib.h>
#include <string.h>
#include "syntax.h"
#include "drc.h"
drc_info *drc_init(real_t cut, real_t boost)
{
drc_info *drc = (drc_info*)faad_malloc(sizeof(drc_info));
memset(drc, 0, sizeof(drc_info));
drc->ctrl1 = cut;
drc->ctrl2 = boost;
drc->num_bands = 1;
drc->band_top[0] = 1024/4 - 1;
drc->dyn_rng_sgn[0] = 1;
drc->dyn_rng_ctl[0] = 0;
return drc;
}
void drc_end(drc_info *drc)
{
if (drc) faad_free(drc);
}
#ifdef FIXED_POINT
static real_t drc_pow2_table[] =
{
COEF_CONST(0.5146511183),
COEF_CONST(0.5297315472),
COEF_CONST(0.5452538663),
COEF_CONST(0.5612310242),
COEF_CONST(0.5776763484),
COEF_CONST(0.5946035575),
COEF_CONST(0.6120267717),
COEF_CONST(0.6299605249),
COEF_CONST(0.6484197773),
COEF_CONST(0.6674199271),
COEF_CONST(0.6869768237),
COEF_CONST(0.7071067812),
COEF_CONST(0.7278265914),
COEF_CONST(0.7491535384),
COEF_CONST(0.7711054127),
COEF_CONST(0.7937005260),
COEF_CONST(0.8169577266),
COEF_CONST(0.8408964153),
COEF_CONST(0.8655365610),
COEF_CONST(0.8908987181),
COEF_CONST(0.9170040432),
COEF_CONST(0.9438743127),
COEF_CONST(0.9715319412),
COEF_CONST(1.0000000000),
COEF_CONST(1.0293022366),
COEF_CONST(1.0594630944),
COEF_CONST(1.0905077327),
COEF_CONST(1.1224620483),
COEF_CONST(1.1553526969),
COEF_CONST(1.1892071150),
COEF_CONST(1.2240535433),
COEF_CONST(1.2599210499),
COEF_CONST(1.2968395547),
COEF_CONST(1.3348398542),
COEF_CONST(1.3739536475),
COEF_CONST(1.4142135624),
COEF_CONST(1.4556531828),
COEF_CONST(1.4983070769),
COEF_CONST(1.5422108254),
COEF_CONST(1.5874010520),
COEF_CONST(1.6339154532),
COEF_CONST(1.6817928305),
COEF_CONST(1.7310731220),
COEF_CONST(1.7817974363),
COEF_CONST(1.8340080864),
COEF_CONST(1.8877486254),
COEF_CONST(1.9430638823)
};
#endif
void drc_decode(drc_info *drc, real_t *spec)
{
uint16_t i, bd, top;
#ifdef FIXED_POINT
int32_t exp, frac;
#else
real_t factor, exp;
#endif
uint16_t bottom = 0;
if (drc->num_bands == 1)
drc->band_top[0] = 1024/4 - 1;
for (bd = 0; bd < drc->num_bands; bd++)
{
top = 4 * (drc->band_top[bd] + 1);
#ifndef FIXED_POINT
/* Decode DRC gain factor */
if (drc->dyn_rng_sgn[bd]) /* compress */
exp = -drc->ctrl1 * (drc->dyn_rng_ctl[bd] - (DRC_REF_LEVEL - drc->prog_ref_level))/REAL_CONST(24.0);
else /* boost */
exp = drc->ctrl2 * (drc->dyn_rng_ctl[bd] - (DRC_REF_LEVEL - drc->prog_ref_level))/REAL_CONST(24.0);
factor = (real_t)pow(2.0, exp);
/* Apply gain factor */
for (i = bottom; i < top; i++)
spec[i] *= factor;
#else
/* Decode DRC gain factor */
if (drc->dyn_rng_sgn[bd]) /* compress */
{
exp = -1 * (drc->dyn_rng_ctl[bd] - (DRC_REF_LEVEL - drc->prog_ref_level))/ 24;
frac = -1 * (drc->dyn_rng_ctl[bd] - (DRC_REF_LEVEL - drc->prog_ref_level)) % 24;
} else { /* boost */
exp = (drc->dyn_rng_ctl[bd] - (DRC_REF_LEVEL - drc->prog_ref_level))/ 24;
frac = (drc->dyn_rng_ctl[bd] - (DRC_REF_LEVEL - drc->prog_ref_level)) % 24;
}
/* Apply gain factor */
if (exp < 0)
{
for (i = bottom; i < top; i++)
{
spec[i] >>= -exp;
if (frac)
spec[i] = MUL_R(spec[i],drc_pow2_table[frac+23]);
}
} else {
for (i = bottom; i < top; i++)
{
spec[i] <<= exp;
if (frac)
spec[i] = MUL_R(spec[i],drc_pow2_table[frac+23]);
}
}
#endif
bottom = top;
}
}
|