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
|
/* hacktv - Analogue video transmitter for the HackRF */
/*=======================================================================*/
/* Copyright 2017 Philip Heron <phil@sanslogic.co.uk> */
/* */
/* 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 3 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, see <http://www.gnu.org/licenses/>. */
#ifndef _VIDEOCRYPT_H
#define _VIDEOCRYPT_H
#include <stdint.h>
#include "video.h"
#define VC_SAMPLE_RATE 14000000
#define VC_WIDTH (VC_SAMPLE_RATE / 25 / 625)
#define VC_VBI_LEFT 120
#define VC_VBI_FIELD_1_START 12
#define VC_VBI_FIELD_2_START 325
#define VC_VBI_LINES_PER_FIELD 4
#define VC_VBI_LINES_PER_FRAME (VC_VBI_LINES_PER_FIELD * 2)
#define VC_VBI_SAMPLES_PER_BIT 18
#define VC_VBI_BITS_PER_LINE 40
#define VC_VBI_BYTES_PER_LINE (VC_VBI_BITS_PER_LINE / 8)
#define VC_PACKET_LENGTH 32
#define VC_LEFT 120
#define VC_RIGHT (VC_LEFT + 710)
#define VC_OVERLAP 15
#define VC_FIELD_1_START 23
#define VC_FIELD_2_START 335
#define VC_LINES_PER_FIELD 287
#define VC_LINES_PER_FRAME (VC_LINES_PER_FIELD * 2)
#define VC_PRBS_CW_FA (((uint64_t) 1 << 60) - 1)
#define VC_PRBS_CW_MASK (((uint64_t) 1 << 60) - 1)
#define VC_PRBS_SR1_MASK (((uint32_t) 1 << 31) - 1)
#define VC_PRBS_SR2_MASK (((uint32_t) 1 << 29) - 1)
#define VC2_VBI_FIELD_1_START (VC_VBI_FIELD_1_START - 4)
#define VC2_VBI_FIELD_2_START (VC_VBI_FIELD_2_START - 4)
typedef struct {
uint8_t mode;
uint64_t codeword;
uint8_t messages[7][32];
} _vc_block_t;
typedef struct {
uint8_t mode;
uint64_t codeword;
uint8_t messages[8][32];
} _vc2_block_t;
typedef struct {
uint8_t counter;
/* VC1 blocks */
const _vc_block_t *blocks;
size_t block;
size_t block_len;
uint8_t message[32];
uint8_t vbi[VC_VBI_BYTES_PER_LINE * VC_VBI_LINES_PER_FRAME];
/* VC2 blocks */
const _vc2_block_t *blocks2;
size_t block2;
size_t block2_len;
uint8_t message2[32];
uint8_t vbi2[VC_VBI_BYTES_PER_LINE * VC_VBI_LINES_PER_FRAME];
/* PRBS generator */
uint64_t cw;
uint64_t sr1;
uint64_t sr2;
uint16_t c;
int video_scale[VC_WIDTH];
} vc_t;
extern int vc_init(vc_t *s, vid_t *vs, const char *mode, const char *mode2);
extern void vc_free(vc_t *s);
extern int vc_render_line(vid_t *s, void *arg, int nlines, vid_line_t **lines);
#endif
|
