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/*
* libzvbi - Teletext decoder
*
* Copyright (C) 2000, 2001, 2002, 2003, 2004 Michael H. Schimek
*
* Based on code from AleVT 1.5.1
* Copyright (C) 1998, 1999 Edgar Toernig <froese@gmx.de>
*
* 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 2 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, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
/* $Id: teletext_decoder-priv.h,v 1.4 2005/09/01 01:40:52 mschimek Exp $ */
#ifndef TELETEXT_DECODER_PRIV_H
#define TELETEXT_DECODER_PRIV_H
#include "event-priv.h" /* _vbi3_event_handler_list */
#include "cache-priv.h" /* vbi3_cache, vt.h */
#ifndef ZAPPING8
# include "pfc_demux.h" /* vbi3_pfc_demux */
# include "trigger.h" /* _vbi3_trigger */
#endif
#include "teletext_decoder.h"
typedef void
teletext_reset_fn (vbi3_teletext_decoder *td,
cache_network * cn,
double time);
typedef void
teletext_delete_fn (vbi3_teletext_decoder *td);
struct _vbi3_teletext_decoder {
/**
* Pages in progress, per magazine in case of parallel transmission.
* When complete we copy the page into the cache.
*/
cache_page buffer[8];
/**
* Current page, points into buffer[], switched by a page header
* with different magazine number. Can be @c NULL (no header
* received yet).
*/
cache_page * current;
#ifndef ZAPPING8
/** Page Function Clear EPG Data. */
vbi3_pfc_demux epg_stream[2];
/** EACEM triggers. */
_vbi3_trigger * triggers;
#endif
/** Used for channel switch detection, see there. */
pagenum header_page;
uint8_t header[40];
/** Time to receive a packet 8/30 CNI or VPS CNI. */
double cni_830_timeout;
double cni_vps_timeout;
/**
* Remember past uncorrectable errors: One bit for each call of
* vbi3_teletext_decoder_feed(), most recent result in lsb. The idea
* is to disable the decoder if we get too many errors.
*/
unsigned int error_history;
/* Interface */
/** The cache we use. */
vbi3_cache * cache;
/** Current network in the cache. */
cache_network * network;
double timestamp;
double reset_time;
vbi3_videostd_set videostd_set;
/** Called by vbi3_teletext_decoder_reset(). */
teletext_reset_fn * virtual_reset;
_vbi3_event_handler_list handlers;
/** Called by vbi3_teletext_decoder_delete(). */
teletext_delete_fn * virtual_delete;
};
/* in packet.c */
extern cache_page *
_vbi3_convert_cached_page (cache_page * cp,
page_function new_function);
extern void
_vbi3_teletext_decoder_resync (vbi3_teletext_decoder * td);
extern void
_vbi3_teletext_decoder_destroy (vbi3_teletext_decoder * td);
extern vbi3_bool
_vbi3_teletext_decoder_init (vbi3_teletext_decoder * td,
vbi3_cache * ca,
const vbi3_network * nk,
vbi3_videostd_set videostd_set);
#endif /* TELETEXT_DECODER_PRIV_H */
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