/*
* libzvbi - Sliced vbi data object
*
* Copyright (C) 2000, 2001 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: sliced.h,v 1.6 2006/05/26 00:45:25 mschimek Exp $ */
#ifndef SLICED_H
#define SLICED_H
/* Public */
#include <inttypes.h>
/**
* @addtogroup Sliced Sliced VBI data
* @ingroup Raw
* @brief Definition of sliced VBI data.
*
* The output of the libzvbi raw VBI decoder, and input to the data
* service decoder, is VBI data in binary format as defined in this
* section. It is similar to the output of hardware VBI decoders
* and VBI data transmitted in digital TV streams.
*/
/**
* @name Data service symbols
* @ingroup Sliced
* @{
*/
/**
* @anchor VBI_SLICED_
* No data service, blank vbi_sliced structure.
*/
#define VBI_SLICED_NONE 0
/**
* Unknown data service (vbi_dvb_demux).
* @since 0.2.10
*/
#define VBI_SLICED_UNKNOWN 0
/**
* Antiope a.k.a. Teletext System A
*
* Reference: <a href="http://www.itu.ch">ITU-R BT.653
* "Teletext Systems"</a>
*
* vbi_sliced payload: Last 37 bytes, without clock run-in and
* framing code, lsb first transmitted.
*
* @since 0.2.10
*/
#define VBI_SLICED_ANTIOPE 0x00002000
/**
* Synonym of VBI_SLICED_ANTIOPE.
* @since 0.2.10
*/
#define VBI_SLICED_TELETEXT_A 0x00002000
#define VBI_SLICED_TELETEXT_B_L10_625 0x00000001
#define VBI_SLICED_TELETEXT_B_L25_625 0x00000002
/**
* Teletext System B for 625 line systems
*
* Note this is separated into Level 1.0 and Level 2.5+ since the latter
* permits occupation of scan line 6 which is frequently out of
* range of raw VBI capture drivers. Clients should request decoding of both,
* may then verify Level 2.5 is covered. vbi_sliced id can be
* VBI_SLICED_TELETEXT_B, _B_L10_625 or _B_L25_625 regardless of line number.
*
* Reference: <a href="http://www.etsi.org">EN 300 706
* "Enhanced Teletext specification"</a>, <a href="http://www.itu.ch">
* ITU-R BT.653 "Teletext Systems"</a>
*
* vbi_sliced payload: Last 42 of the 45 byte Teletext packet, that is
* without clock run-in and framing code, lsb first transmitted.
*/
#define VBI_SLICED_TELETEXT_B (VBI_SLICED_TELETEXT_B_L10_625 | \
VBI_SLICED_TELETEXT_B_L25_625)
/**
* Synonym of VBI_SLICED_TELETEXT_B.
* @since 0.2.10
*/
#define VBI_SLICED_TELETEXT_B_625 VBI_SLICED_TELETEXT_B
/**
* Teletext System C for 625 line systems
*
* Reference: <a href="http://www.itu.ch">ITU-R BT.653
* "Teletext Systems"</a>
*
* vbi_sliced payload: Last 33 bytes, without clock run-in and
* framing code, lsb first transmitted.
*
* @since 0.2.10
*/
#define VBI_SLICED_TELETEXT_C_625 0x00004000
/**
* Teletext System D for 625 line systems
*
* Reference: <a href="http://www.itu.ch">ITU-R BT.653
* "Teletext Systems"</a>
*
* vbi_sliced payload: Last 34 bytes, without clock run-in and
* framing code, lsb first transmitted.
*
* @since 0.2.10
*/
#define VBI_SLICED_TELETEXT_D_625 0x00008000
/**
* Video Program System
*
* Reference: <a href="http://www.etsi.org">ETS 300 231
* "Specification of the domestic video Programme
* Delivery Control system (PDC)"</a>, <a href="http://www.irt.de">
* IRT 8R2 "Video-Programm-System (VPS)"</a>.
*
* vbi_sliced payload: Byte number 3 to 15 according to ETS 300 231
* Figure 9, lsb first transmitted.
*/
#define VBI_SLICED_VPS 0x00000004
/**
* Pseudo-VPS signal transmitted on field 2
*
* vbi_sliced payload: 13 bytes.
*
* @since 0.2.10
*/
#define VBI_SLICED_VPS_F2 0x00001000
#define VBI_SLICED_CAPTION_625_F1 0x00000008
#define VBI_SLICED_CAPTION_625_F2 0x00000010
/**
* Closed Caption for 625 line systems
*
* Note this is split into field one and two services since for basic
* caption decoding only field one is required. vbi_sliced id can be
* VBI_SLICED_CAPTION_625, _625_F1 or _625_F2 regardless of line number.
*
* Reference: <a href="http://global.ihs.com">EIA 608
* "Recommended Practice for Line 21 Data Service"</a>.
*
* vbi_sliced payload: First and second byte including parity,
* lsb first transmitted.
*/
#define VBI_SLICED_CAPTION_625 (VBI_SLICED_CAPTION_625_F1 | \
VBI_SLICED_CAPTION_625_F2)
/**
* Wide Screen Signalling for 625 line systems
*
* Reference: <a href="http://www.etsi.org">EN 300 294
* "625-line television Wide Screen Signalling (WSS)"</a>.
*
* vbi_sliced payload:
* <pre>
* Byte 0 1
* msb lsb msb lsb
* bit 7 6 5 4 3 2 1 0 x x 13 12 11 10 9 8<br></pre>
* according to EN 300 294, Table 1, lsb first transmitted.
*/
#define VBI_SLICED_WSS_625 0x00000400
#define VBI_SLICED_CAPTION_525_F1 0x00000020
#define VBI_SLICED_CAPTION_525_F2 0x00000040
/**
* Closed Caption for 525 line systems (NTSC).
*
* Note this is split into field one and two services since for basic
* caption decoding only field one is required. vbi_sliced id can be
* VBI_SLICED_CAPTION_525, _525_F1 or _525_F2 regardless of line number.
*
* VBI_SLICED_CAPTION_525 also covers XDS (Extended Data Service),
* V-Chip data and ITV / WebTV data.
*
* Reference: <a href="http://global.ihs.com">EIA 608
* "Recommended Practice for Line 21 Data Service"</a>.
*
* vbi_sliced payload: First and second byte including parity,
* lsb first transmitted.
*/
#define VBI_SLICED_CAPTION_525 (VBI_SLICED_CAPTION_525_F1 | \
VBI_SLICED_CAPTION_525_F2)
/**
* Closed Caption at double bit rate for 525 line systems.
*
* Reference: ?
*
* vbi_sliced payload: First to fourth byte including parity bit,
* lsb first transmitted.
*/
#define VBI_SLICED_2xCAPTION_525 0x00000080
/**
* Teletext System B for 525 line systems
*
* Reference: <a href="http://www.itu.ch">ITU-R BT.653
* "Teletext Systems"</a>
*
* vbi_sliced payload: Last 34 bytes, without clock run-in and
* framing code, lsb first transmitted.
*
* @since 0.2.10
*/
#define VBI_SLICED_TELETEXT_B_525 0x00010000
/**
* North American Basic Teletext Specification
* a.k.a. Teletext System C for 525 line systems
*
* Reference: <a href="http://global.ihs.com">EIA-516
* "North American Basic Teletext Specification (NABTS)"</a>,
* <a href="http://www.itu.ch">ITU-R BT.653 "Teletext Systems"</a>
*
* vbi_sliced payload: Last 33 bytes, without clock run-in and
* framing code, lsb first transmitted.
*
* @since 0.2.10
*/
#define VBI_SLICED_NABTS 0x00000100
/**
* Synonym of VBI_SLICED_NABTS.
* @since 0.2.10
*/
#define VBI_SLICED_TELETEXT_C_525 0x00000100
/**
* Misdefined.
*
* vbi_sliced payload: 34 bytes.
*
* @deprecated
* This service was misdefined.
* Use VBI_SLICED_TELETEXT_B_525 or VBI_SLICED_TELETEXT_D_525 in new code.
*/
#define VBI_SLICED_TELETEXT_BD_525 0x00000200
/**
* Teletext System D for 525 line systems
*
* Reference: <a href="http://www.itu.ch">ITU-R BT.653
* "Teletext Systems"</a>
*
* vbi_sliced payload: Last 34 bytes, without clock run-in and
* framing code, lsb first transmitted.
*
* @since 0.2.10
*/
#define VBI_SLICED_TELETEXT_D_525 0x00020000
/**
* Wide Screen Signalling for NTSC Japan
*
* Reference: <a href="http://www.jeita.or.jp">EIA-J CPR-1204</a>
*
* vbi_sliced payload:
* <pre>
* Byte 0 1 2
* msb lsb msb lsb msb lsb
* bit 7 6 5 4 3 2 1 0 15 14 13 12 11 10 9 8 x x x x 19 18 17 16
* </pre>
*/
#define VBI_SLICED_WSS_CPR1204 0x00000800
/**
* No actual data service. This symbol is used to request capturing
* of all PAL/SECAM VBI data lines from the libzvbi driver interface,
* as opposed to just those lines used to transmit the requested
* data services.
*/
#define VBI_SLICED_VBI_625 0x20000000
/**
* No actual data service. This symbol is used to request capturing
* of all NTSC VBI data lines from the libzvbi driver interface,
* as opposed to just those lines used to transmit the requested
* data services.
*/
#define VBI_SLICED_VBI_525 0x40000000
/** @} */
typedef unsigned int vbi_service_set;
/**
* @ingroup Sliced
* @brief This structure holds one scan line of sliced vbi data.
*
* For example the contents of NTSC line 21, two bytes of Closed Caption
* data. Usually an array of vbi_sliced is used, covering all
* VBI lines of the two fields of a video frame.
*/
typedef struct {
/**
* A @ref VBI_SLICED_ symbol identifying the data service. Under cirumstances
* (see VBI_SLICED_TELETEXT_B) this can be a set of VBI_SLICED_ symbols.
*/
uint32_t id;
/**
* Source line number according to the ITU-R line numbering scheme,
* a value of @c 0 if the exact line number is unknown. Note that some
* data services cannot be reliable decoded without line number.
*
* @image html zvbi_625.gif "ITU-R PAL/SECAM line numbering scheme"
* @image html zvbi_525.gif "ITU-R NTSC line numbering scheme"
*/
uint32_t line;
/**
* The actual payload. See the documentation of @ref VBI_SLICED_ symbols
* for details.
*/
uint8_t data[56];
} vbi_sliced;
/**
* @addtogroup Sliced
* @{
*/
extern const char *
vbi_sliced_name (vbi_service_set service)
__attribute__ ((const));
extern unsigned int
vbi_sliced_payload_bits (vbi_service_set service)
__attribute__ ((const));
/** @} */
/* Private */
#endif /* SLICED_H */
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