mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-11-28 12:41:05 +00:00
b0b02e7cb5
Current code from zapping/zvbi as of 2018-03-14. Files copied are all LGPL v2+. Changes from original zvbi code: * Switch to gst-debug logging system * Use glib for endianness detection * Fix compilation warnings
367 lines
10 KiB
C
367 lines
10 KiB
C
/*
|
|
* libzvbi -- Sliced VBI data
|
|
*
|
|
* Copyright (C) 2000, 2001 Michael H. Schimek
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Library General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2 of the License, or (at your option) any later version.
|
|
*
|
|
* This library 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
|
|
* Library General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Library General Public
|
|
* License along with this library; if not, write to the
|
|
* Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
|
|
* Boston, MA 02110-1301 USA.
|
|
*/
|
|
|
|
/* $Id: sliced.h,v 1.11 2008-02-24 14:17:02 mschimek Exp $ */
|
|
|
|
#ifndef SLICED_H
|
|
#define SLICED_H
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
/* 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)
|
|
_vbi_const;
|
|
extern unsigned int
|
|
vbi_sliced_payload_bits (vbi_service_set service)
|
|
_vbi_const;
|
|
/** @} */
|
|
|
|
/* Private */
|
|
|
|
#ifdef __cplusplus
|
|
}
|
|
#endif
|
|
|
|
#endif /* SLICED_H */
|
|
|
|
/*
|
|
Local variables:
|
|
c-set-style: K&R
|
|
c-basic-offset: 8
|
|
End:
|
|
*/
|