X-Git-Url: https://git.cweiske.de/enigma2.git/blobdiff_plain/7a55b56227014d8e6cff6773946d19219b4599f8..415ca9463253732802a6166871261438639d3975:/lib/dvb/teletext.cpp diff --git a/lib/dvb/teletext.cpp b/lib/dvb/teletext.cpp index c96fbed9..7128000d 100644 --- a/lib/dvb/teletext.cpp +++ b/lib/dvb/teletext.cpp @@ -3,14 +3,79 @@ #include #include -/* - This is a very simple en300 706 telext decoder. - - It can only decode a single page at a time, thus it's only used - for subtitles. - - */ +// Try to map teletext characters into ISO-8859-1 charset +// Use similar looking or similar meaning characters when possible. + +// G0 and G2 national option table +// see table 33 in ETSI EN 300 706 +// use it with (triplet 1 bits 14-11)*(ctrl bits C12-14) + +unsigned char LatinNationalOptionSubsetsLookup[16*8] = +{ + 1, 4, 11, 5, 3, 8, 0, 1, + 7, 4, 11, 5, 3, 1, 0, 1, + 1, 4, 11, 5, 3, 8, 12, 1, + 1, 1, 1, 1, 1, 10, 1, 9, + 1, 4, 2, 6, 1, 1, 0, 1, + 1, 1, 1, 1, 1, 1, 1, 1, // reserved + 1, 1, 1, 1, 1, 1, 12, 1, + 1, 1, 1, 1, 1, 1, 1, 1, // reserved + 1, 1, 1, 1, 3, 1, 1, 1, + 1, 1, 1, 1, 1, 1, 1, 1, // reserved + 1, 1, 1, 1, 1, 1, 1, 1, + 1, 1, 1, 1, 1, 1, 1, 1, // reserved + 1, 1, 1, 1, 1, 1, 1, 1, // reserved + 1, 1, 1, 1, 1, 1, 1, 1, // reserved + 1, 1, 1, 1, 1, 1, 1, 1, // reserved + 1, 1, 1, 1, 1, 1, 1, 1 // reserved +}; + +unsigned char LatinNationalReplaceMap[128] = +{ + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 1, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 3, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 4, 5, 6, 7, 8, + 9, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, + 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 10, 11, 12, 13, 0 +}; + +// latin national option subsets +// see table 36 in ETSI EN 300 706 +unsigned char LatinNationalOptionSubsets[13*14] = { + 0, '#', 'u', 'c', 't', 'z', 'ý', 'í', 'r', 'é', 'á', 'e', 'ú', 's', // Slovak/Czech + 0, '£', '$', '@', '-', '½', '-', '|', '#', '-', '¼', '#', '¾', '÷', // English + 0, '#', 'õ', 'S', 'Ä', 'Ö', 'Z', 'Ü', 'Õ', 's', 'ä', 'ö', 'z', 'ü', // Estonian + 0, 'é', 'ï', 'à', 'ë', 'ê', 'ù', 'î', '#', 'è', 'â', 'ô', 'û', 'ç', // French + 0, '#', '$', '§', 'Ä', 'Ö', 'Ü', '^', '_', 'º', 'ä', 'ö', 'ü', 'ß', // German + 0, '£', '$', 'é', 'º', 'ç', '-', '|', '#', 'ù', 'à', 'ò', 'è', 'ì', // Italian + 0, '#', '$', 'S', 'e', 'e', 'Z', 'c', 'u', 's', 'a', 'u', 'z', 'i', // Lithuanian/Lettish + 0, '#', 'n', 'a', 'Z', 'S', 'L', 'c', 'ó', 'e', 'z', 's', 'l', 'z', // Polish + 0, 'ç', '$', 'i', 'á', 'é', 'í', 'ó', 'ú', '¿', 'ü', 'ñ', 'è', 'à', // Spanish/Portuguese + 0, '#', '¤', 'T', 'Â', 'S', 'A', 'Î', 'i', 't', 'â', 's', 'a', 'î', // Rumanian + 0, '#', 'Ë', 'C', 'C', 'Z', 'D', 'S', 'ë', 'c', 'c', 'z', 'd', 's', // Slovenian/Serbian/Croation + 0, '#', '¤', 'É', 'Ä', 'Ö', 'Å', 'Ü', '_', 'é', 'ä', 'ö', 'å', 'ü', // Finnish/Hungarian/Swedish + 0, 'T', 'g', 'I', 'S', 'Ö', 'Ç', 'Ü', 'G', 'i', 's', 'ö', 'ç', 'ü' // Turkish +}; + +unsigned char MapTeletextG0Latin1Char(int Gtriplet, int NatOpts, unsigned char inchar) +{ + int num = LatinNationalOptionSubsetsLookup[(Gtriplet&0xf)*(NatOpts&0x7)]; + unsigned char c = inchar&0x7f; + unsigned char cc = LatinNationalReplaceMap[c]; + if(cc) + return LatinNationalOptionSubsets[num*cc]; + else + return c; +} + +// This is a very simple en300 706 telext decoder. +// It can only decode a single page at a time, thus it's only used +// for subtitles. + DEFINE_REF(eDVBTeletextParser); /* we asumme error free transmission! */ @@ -70,7 +135,7 @@ eDVBTeletextParser::eDVBTeletextParser(iDVBDemux *demux) { setStreamID(0xBD); /* as per en 300 472 */ - setPage(-1); + setPageAndMagazine(0,0); if (demux->createPESReader(eApp, m_pes_reader)) eDebug("failed to create teletext subtitle PES reader!"); @@ -118,6 +183,12 @@ void eDVBTeletextParser::processPESPacket(__u8 *pkt, int len) break; } + if (data_unit_id != 0x03) + { + /* eDebug("non subtitle data unit id %d", data_unit_id); */ + break; + } + unsigned char line_offset = *p++; len--; unsigned char framing_code = *p++; len--; @@ -157,7 +228,7 @@ void eDVBTeletextParser::processPESPacket(__u8 *pkt, int len) int serial_mode = m_C & (1<<11); /* page on the same magazine? end current page. */ - if ((serial_mode || (m_M == m_page_M)) && (m_page_open)) + if ((serial_mode || m_M == m_page_M) && m_page_open) { handlePageEnd(have_pts, pts); m_page_open = 0; @@ -166,10 +237,17 @@ void eDVBTeletextParser::processPESPacket(__u8 *pkt, int len) m_X = decode_hamming_84(data+1) * 0x10 + decode_hamming_84(data); if ((m_C & (1<<6)) && (m_X != 0xFF)) /* scan for pages with subtitle bit set */ - m_found_subtitle_pages.insert((m_M << 8) | m_X); - + { + eDVBServicePMTHandler::subtitleStream s; + s.pid = m_pid; + s.subtitling_type = 0x01; // ebu teletext subtitle + s.teletext_page_number = m_X & 0xFF; + s.teletext_magazine_number = m_M & 7; + m_found_subtitle_pages.insert(s); + } + /* correct page on correct magazine? open page. */ - if ((m_M == m_page_M) && (m_X == m_page_X)) + if (m_M == m_page_M && m_X == m_page_X) { handlePageStart(); m_page_open = 1; @@ -177,8 +255,8 @@ void eDVBTeletextParser::processPESPacket(__u8 *pkt, int len) } } else { - /* data for the selected page? */ - if ((m_M == m_page_M) && m_page_open) + /* data for the selected page ? */ + if (m_M == m_page_M && m_page_open) handleLine(data, 40); } } @@ -189,7 +267,10 @@ int eDVBTeletextParser::start(int pid) m_page_open = 0; if (m_pes_reader) + { + m_pid = pid; return m_pes_reader->start(pid); + } else return -1; } @@ -269,19 +350,18 @@ void eDVBTeletextParser::handlePageEnd(int have_pts, const pts_t &pts) m_subtitle_page.m_have_pts = have_pts; m_subtitle_page.m_pts = pts; m_subtitle_page.m_timeout = 90000 * 20; /* 20s */ - if (m_page_number != -1) + if (m_page_X != 0) sendSubtitlePage(); /* send assembled subtitle page to display */ } -void eDVBTeletextParser::setPage(int page) +void eDVBTeletextParser::setPageAndMagazine(int page, int magazine) { if (page > 0) eDebug("enable teletext subtitle page %d", page); else eDebug("disable teletext subtitles"); - m_page_number = page; - m_page_M = (page >> 8) & 7; /* magazine to look for */ - m_page_X = page & 0xFF; /* page number */ + m_page_M = magazine&7; /* magazine to look for */ + m_page_X = page&0xFF; /* page number */ } void eDVBTeletextParser::connectNewPage(const Slot1 &slot, ePtr &connection) @@ -294,13 +374,23 @@ void eDVBTeletextParser::addSubtitleString(int color, std::string string) // eDebug("add subtitle string: %s, col %d", string.c_str(), color); int force_cell = 0; - + if (string.substr(0, 2) == "- ") { string = string.substr(2); force_cell = 1; } + int len = string.length(); + int idx = 0; + + while (idx < len) + { + if (string[idx] >= 0x20) + string[idx] = MapTeletextG0Latin1Char(0, (m_C >> 11), string[idx]); + ++idx; + } + // eDebug("color %d, m_subtitle_color %d", color, m_subtitle_color); gRGB rgbcol((color & 1) ? 255 : 128, (color & 2) ? 255 : 128, (color & 4) ? 255 : 128); if ((color != m_subtitle_color || force_cell) && !m_subtitle_text.empty() && ((color == -2) || !string.empty()))