path: root/src/cc.h (plain)
blob: 916448d45e0ef4b58127eb8e23aa51597b3460fa

1	/*
2	* libzvbi -- Closed Caption decoder
3	*
4	* Copyright (C) 2000, 2001, 2002 Michael H. Schimek
5	*
6	* This library is free software; you can redistribute it and/or
7	* modify it under the terms of the GNU Library General Public
8	* License as published by the Free Software Foundation; either
9	* version 2 of the License, or (at your option) any later version.
10	*
11	* This library is distributed in the hope that it will be useful,
12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14	* Library General Public License for more details.
15	*
16	* You should have received a copy of the GNU Library General Public
17	* License along with this library; if not, write to the
18	* Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
19	* Boston, MA 02110-1301 USA.
20	*/
21
22	/* $Id: cc.h,v 1.9 2008/02/19 00:35:15 mschimek Exp $ */
23
24	#ifndef CC_H
25	#define CC_H
26
27	#include <pthread.h>
28
29	#include "bcd.h"
30	#include "format.h"
31
32	#ifndef VBI_DECODER
33	#define VBI_DECODER
34	typedef struct vbi_decoder vbi_decoder;
35	#endif
36
37	typedef struct {
38	int count;
39	int chksum;
40	uint8_t buffer[32];
41	} xds_sub_packet;
42
43	typedef enum {
44	MODE_NONE,
45	MODE_POP_ON,
46	MODE_PAINT_ON,
47	MODE_ROLL_UP,
48	MODE_TEXT
49	} cc_mode;
50
51	typedef struct {
52	cc_mode mode;
53
54	int col, col1;
55	int row, row1;
56	int roll;
57
58	int nul_ct; // XXX should be 'silence count'
59	double time;
60	unsigned char * language; /* Latin-1 */
61
62	vbi_char attr;
63	vbi_char * line;
64
65	int hidden;
66	vbi_page pg[2];
67	int update;
68	} cc_channel;
69
70	struct caption {
71	pthread_mutex_t mutex;
72
73	uint8_t last[2]; /* field 1, cc command repetition */
74	uint8_t last_f1[2];
75	uint8_t last_f2[2];
76
77	int curr_chan;
78	int curr_chan_f1;
79	int curr_chan_f2;
80
81	vbi_char transp_space[2]; /* caption, text mode */
82	cc_channel channel[9]; /* caption 1-4, text 1-4, garbage */
83
84	xds_sub_packet sub_packet[4][0x18];
85	xds_sub_packet * curr_sp;
86	int xds;
87
88	uint8_t itv_buf[256];
89	int itv_count;
90
91	int info_cycle[2];
92	int flash_state;
93	};
94
95	/* Public */
96
97	/**
98	* @addtogroup Cache
99	* @{
100	*/
101	extern vbi_bool vbi_fetch_cc_page(vbi_decoder *vbi, vbi_page *pg,
102	vbi_pgno pgno, vbi_bool reset);
103	/** @} */
104
105	/* Private */
106
107	extern void vbi_caption_init(vbi_decoder *vbi);
108	extern void vbi_caption_destroy(vbi_decoder *vbi);
109	extern void vbi_decode_caption(vbi_decoder *vbi, int line, uint8_t *buf);
110	extern void vbi_caption_desync(vbi_decoder *vbi);
111	extern void vbi_caption_channel_switched(vbi_decoder *vbi);
112	extern void vbi_caption_color_level(vbi_decoder *vbi);
113
114	#endif /* CC_H */
115
116	/*
117	Local variables:
118	c-set-style: K&R
119	c-basic-offset: 8
120	End:
121	*/
122