1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
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
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
|
/*
* libzvbi - Raw VBI sampling
*
* Copyright (C) 2000, 2001, 2002, 2003, 2004 Michael H. Schimek
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*
* 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/* $Id: sampling_par.h,v 1.5 2005/09/01 01:40:52 mschimek Exp $ */
#ifndef __ZVBI3_SAMPLING_PAR_H__
#define __ZVBI3_SAMPLING_PAR_H__
#include <inttypes.h> /* uint64_t */
#include "macros.h"
#include "misc.h"
#include "image_format.h" /* vbi3_pixfmt */
#include "sliced.h" /* vbi3_service_set */
VBI3_BEGIN_DECLS
/**
* @addtogroup Sampling
* @{
*/
/** Videostandard identifier. */
typedef enum {
VBI3_VIDEOSTD_NONE = 0,
VBI3_VIDEOSTD_UNKNOWN = VBI3_VIDEOSTD_NONE,
VBI3_VIDEOSTD_PAL_B = 1,
VBI3_VIDEOSTD_PAL_B1,
VBI3_VIDEOSTD_PAL_G,
VBI3_VIDEOSTD_PAL_H,
VBI3_VIDEOSTD_PAL_I,
VBI3_VIDEOSTD_PAL_D,
VBI3_VIDEOSTD_PAL_D1,
VBI3_VIDEOSTD_PAL_K,
VBI3_VIDEOSTD_PAL_M = 9,
VBI3_VIDEOSTD_PAL_N,
VBI3_VIDEOSTD_PAL_NC,
VBI3_VIDEOSTD_NTSC_M = 13,
VBI3_VIDEOSTD_NTSC_M_JP,
VBI3_VIDEOSTD_SECAM_B = 17,
VBI3_VIDEOSTD_SECAM_D,
VBI3_VIDEOSTD_SECAM_G,
VBI3_VIDEOSTD_SECAM_H,
VBI3_VIDEOSTD_SECAM_K,
VBI3_VIDEOSTD_SECAM_K1,
VBI3_VIDEOSTD_SECAM_L,
/**
* Video hardware may support custom videostandards not defined
* by libzvbi, for example hybrid standards to play back NTSC video
* tapes at 60 Hz on a PAL TV.
*/
VBI3_VIDEOSTD_CUSTOM_BEGIN = 32,
VBI3_VIDEOSTD_CUSTOM_END = 64
} vbi3_videostd;
/**
* A set of videostandards is used where more than one
* videostandard may apply. Use VBI3_VIDEOSTD_SET macros
* to build a set.
*/
typedef uint64_t vbi3_videostd_set;
#define VBI3_VIDEOSTD_SET(videostd) (((vbi3_videostd_set) 1) << (videostd))
#define VBI3_VIDEOSTD_SET_UNKNOWN 0
#define VBI3_VIDEOSTD_SET_EMPTY 0
#define VBI3_VIDEOSTD_SET_PAL_BG (VBI3_VIDEOSTD_SET (VBI3_VIDEOSTD_PAL_B) | \
VBI3_VIDEOSTD_SET (VBI3_VIDEOSTD_PAL_B1) | \
VBI3_VIDEOSTD_SET (VBI3_VIDEOSTD_PAL_G))
#define VBI3_VIDEOSTD_SET_PAL_DK (VBI3_VIDEOSTD_SET (VBI3_VIDEOSTD_PAL_D) | \
VBI3_VIDEOSTD_SET (VBI3_VIDEOSTD_PAL_D1) | \
VBI3_VIDEOSTD_SET (VBI3_VIDEOSTD_PAL_K))
#define VBI3_VIDEOSTD_SET_PAL (VBI3_VIDEOSTD_SET_PAL_BG | \
VBI3_VIDEOSTD_SET_PAL_DK | \
VBI3_VIDEOSTD_SET (VBI3_VIDEOSTD_PAL_H) | \
VBI3_VIDEOSTD_SET (VBI3_VIDEOSTD_PAL_I))
#define VBI3_VIDEOSTD_SET_NTSC (VBI3_VIDEOSTD_SET (VBI3_VIDEOSTD_NTSC_M) | \
VBI3_VIDEOSTD_SET (VBI3_VIDEOSTD_NTSC_M_JP))
#define VBI3_VIDEOSTD_SET_SECAM (VBI3_VIDEOSTD_SET (VBI3_VIDEOSTD_SECAM_B) | \
VBI3_VIDEOSTD_SET (VBI3_VIDEOSTD_SECAM_D) | \
VBI3_VIDEOSTD_SET (VBI3_VIDEOSTD_SECAM_G) | \
VBI3_VIDEOSTD_SET (VBI3_VIDEOSTD_SECAM_H) | \
VBI3_VIDEOSTD_SET (VBI3_VIDEOSTD_SECAM_K) | \
VBI3_VIDEOSTD_SET (VBI3_VIDEOSTD_SECAM_K1) | \
VBI3_VIDEOSTD_SET (VBI3_VIDEOSTD_SECAM_L))
#define VBI3_VIDEOSTD_SET_525_60 (VBI3_VIDEOSTD_SET (VBI3_VIDEOSTD_PAL_M) | \
VBI3_VIDEOSTD_SET_NTSC)
#define VBI3_VIDEOSTD_SET_625_50 (VBI3_VIDEOSTD_SET_PAL | \
VBI3_VIDEOSTD_SET (VBI3_VIDEOSTD_PAL_N) | \
VBI3_VIDEOSTD_SET (VBI3_VIDEOSTD_PAL_NC) | \
VBI3_VIDEOSTD_SET_SECAM)
/** All defined videostandards without custom standards. */
#define VBI3_VIDEOSTD_SET_ALL (VBI3_VIDEOSTD_SET_525_60 | \
VBI3_VIDEOSTD_SET_625_50)
/** All custrom videostandards. */
#define VBI3_VIDEOSTD_SET_CUSTOM \
((~VBI3_VIDEOSTD_SET_EMPTY) << VBI3_VIDEOSTD_CUSTOM_BEGIN)
extern const char *
_vbi3_videostd_name (vbi3_videostd videostd)
__attribute__ ((const));
/**
* @brief Raw VBI sampling parameters.
*/
typedef struct {
/**
* Defines the system all line numbers refer to. Can be more
* than one standard if not exactly known, provided there
* is no ambiguity.
*/
vbi3_videostd_set videostd_set;
/** Format of the raw vbi data. */
vbi3_pixfmt sampling_format;
/**
* Sampling rate in Hz, the number of samples or pixels
* captured per second.
*/
unsigned int sampling_rate;
/**
* Number of samples (pixels) captured per scan line. The
* decoder will access only these bytes.
*/
unsigned int samples_per_line;
/**
* Distance of the first bytes of two successive scan lines
* in memory, in bytes. Must be greater or equal @a
* samples_per_line times bytes per sample.
*/
unsigned long bytes_per_line;
/**
* The distance between 0H (leading edge of horizontal sync pulse,
* half amplitude point) and the first sample (pixel) captured,
* in samples (pixels).
*/
int offset;
/**
* First scan line to be captured, of the first and second field
* respectively, according to the ITU-R line numbering scheme
* (see vbi3_sliced). Set to zero if the exact line number isn't
* known.
*/
unsigned int start[2];
/**
* Number of scan lines captured, of the first and second
* field respectively. This can be zero if only data from one
* field is required or available. The sum @a count[0] + @a
* count[1] determines the raw vbi image height.
*/
unsigned int count[2];
/**
* In the raw vbi image, normally all lines of the second
* field are supposed to follow all lines of the first field. When
* this flag is set, the scan lines of first and second field
* will be interleaved in memory, starting with the first field.
* This implies @a count[0] and @a count[1] are equal.
*/
vbi3_bool interlaced;
/**
* Fields must be stored in temporal order, as the lines have
* been captured. It is assumed that the first field is also
* stored first in memory, however if the hardware cannot reliable
* distinguish between fields this flag shall be cleared, which
* disables decoding of data services depending on the field
* number.
*/
vbi3_bool synchronous;
} vbi3_sampling_par;
#ifndef ZAPPING8
extern vbi3_service_set
vbi3_sampling_par_from_services (vbi3_sampling_par * sp,
unsigned int * max_rate,
vbi3_videostd_set videostd_set,
vbi3_service_set services);
extern vbi3_service_set
vbi3_sampling_par_check_services (const vbi3_sampling_par *sp,
vbi3_service_set services,
unsigned int strict)
__attribute__ ((_vbi3_pure));
/** @} */
/* Private */
extern vbi3_bool
_vbi3_sampling_par_check_service (const vbi3_sampling_par *sp,
const vbi3_service_par *par,
unsigned int strict)
__attribute__ ((_vbi3_pure));
extern vbi3_bool
_vbi3_sampling_par_verify (const vbi3_sampling_par *sp)
__attribute__ ((_vbi3_pure));
#endif /* !ZAPPING8 */
VBI3_END_DECLS
#endif /* __ZVBI3_SAMPLING_PAR_H__ */
|
