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/*
* vdr-ttxtsubs - A plugin for the Linux Video Disk Recorder
* Copyright (c) 2003 - 2008 Ragnar Sundblad <ragge@nada.kth.se>
*
* 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.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
*/
// ----- cTtxtSubsFilter -----
// Filters out the pages on one teletext stream
class cTtxtSubsFilter
{
public:
cTtxtSubsFilter(void);
virtual ~cTtxtSubsFilter(void);
void SetPages(size_t count, uint16_t *pages);
// indata and outdata are pointers to a ttxt data row buffers,
// if return value <> 0 outdata countains data to pass on
int Filter(char *indata, char *outdata);
private:
void FreePages(void);
int Find(int count, uint16_t *pages, uint16_t pageno);
void MakeY0(char *outdata, char *indata, uint16_t newpageno);
int mCount; // number of pages to filter out
uint16_t *mPages; // array of page numbers
int mMagPage[8]; /* index into pages for each mag number, or -1 if
not currently collecting pages for that mag */
};
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