diff options
Diffstat (limited to 'lib/libucsi/dvb/types.c')
| -rw-r--r-- | lib/libucsi/dvb/types.c | 270 |
1 files changed, 270 insertions, 0 deletions
diff --git a/lib/libucsi/dvb/types.c b/lib/libucsi/dvb/types.c new file mode 100644 index 0000000..c1cf583 --- /dev/null +++ b/lib/libucsi/dvb/types.c @@ -0,0 +1,270 @@ +/* + * section and descriptor parser + * + * Copyright (C) 2005 Andrew de Quincey (adq_dvb@lidskialf.net) + * + * This library is free software; you can redistribute it and/or + * modify it under the terms of the GNU Lesser General Public + * License as published by the Free Software Foundation; either + * version 2.1 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 + * Lesser General Public License for more details. + * + * You should have received a copy of the GNU Lesser 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 + */ + +#include <string.h> +#include "types.h" + +time_t dvbdate_to_unixtime(dvbdate_t dvbdate) +{ + int k = 0; + struct tm tm; + double mjd; + + /* check for the undefined value */ + if ((dvbdate[0] == 0xff) && + (dvbdate[1] == 0xff) && + (dvbdate[2] == 0xff) && + (dvbdate[3] == 0xff) && + (dvbdate[4] == 0xff)) { + return -1; + } + + memset(&tm, 0, sizeof(tm)); + mjd = (dvbdate[0] << 8) | dvbdate[1]; + + tm.tm_year = (int) ((mjd - 15078.2) / 365.25); + tm.tm_mon = (int) (((mjd - 14956.1) - (int) (tm.tm_year * 365.25)) / 30.6001); + tm.tm_mday = (int) mjd - 14956 - (int) (tm.tm_year * 365.25) - (int) (tm.tm_mon * 30.6001); + if ((tm.tm_mon == 14) || (tm.tm_mon == 15)) k = 1; + tm.tm_year += k; + tm.tm_mon = tm.tm_mon - 2 - k * 12; + tm.tm_sec = bcd_to_integer(dvbdate[4]); + tm.tm_min = bcd_to_integer(dvbdate[3]); + tm.tm_hour = bcd_to_integer(dvbdate[2]); + + return mktime(&tm); +} + +void unixtime_to_dvbdate(time_t unixtime, dvbdate_t dvbdate) +{ + struct tm tm; + double l = 0; + int mjd; + + /* the undefined value */ + if (unixtime == -1) { + memset(dvbdate, 0xff, 5); + return; + } + + gmtime_r(&unixtime, &tm); + tm.tm_mon++; + if ((tm.tm_mon == 1) || (tm.tm_mon == 2)) l = 1; + mjd = 14956 + tm.tm_mday + (int) ((tm.tm_year - l) * 365.25) + (int) ((tm.tm_mon + 1 + l * 12) * 30.6001); + + dvbdate[0] = (mjd & 0xff00) >> 8; + dvbdate[1] = mjd & 0xff; + dvbdate[2] = integer_to_bcd(tm.tm_hour); + dvbdate[3] = integer_to_bcd(tm.tm_min); + dvbdate[4] = integer_to_bcd(tm.tm_sec); +} + +int dvbduration_to_seconds(dvbduration_t dvbduration) +{ + int seconds = 0; + + seconds += (bcd_to_integer(dvbduration[0]) * 60 * 60); + seconds += (bcd_to_integer(dvbduration[1]) * 60); + seconds += bcd_to_integer(dvbduration[2]); + + return seconds; +} + +void seconds_to_dvbduration(int seconds, dvbduration_t dvbduration) +{ + int hours, mins; + + hours = seconds / (60*60); + seconds -= (hours * 60 * 60); + mins = seconds / 60; + seconds -= (mins * 60); + + dvbduration[0] = integer_to_bcd(hours); + dvbduration[1] = integer_to_bcd(mins); + dvbduration[2] = integer_to_bcd(seconds); +} + +int dvbhhmm_to_seconds(dvbhhmm_t dvbhhmm) +{ + int seconds = 0; + + seconds += (bcd_to_integer(dvbhhmm[0]) * 60 * 60); + seconds += (bcd_to_integer(dvbhhmm[1]) * 60); + + return seconds; +} + +void seconds_to_dvbhhmm(int seconds, dvbhhmm_t dvbhhmm) +{ + int hours, mins; + + hours = seconds / (60*60); + seconds -= (hours * 60 * 60); + mins = seconds / 60; + + dvbhhmm[0] = integer_to_bcd(hours); + dvbhhmm[1] = integer_to_bcd(mins); +} + +uint32_t integer_to_bcd(uint32_t intval) +{ + uint32_t val = 0; + + int i; + for(i=0; i<=28;i+=4) { + val |= ((intval % 10) << i); + intval /= 10; + } + + return val; +} + +uint32_t bcd_to_integer(uint32_t bcdval) +{ + uint32_t val = 0; + + int i; + for(i=28; i>=0;i-=4) { + val += ((bcdval >> i) & 0x0f); + if (i != 0) val *= 10; + } + + return val; +} + +const char *dvb_charset(char *dvb_text, int dvb_text_length, int *consumed) +{ + char *charset = "ISO6937"; + int used = 0; + + if (dvb_text_length == 0) + goto exit; + if (dvb_text[0] >= 32) + goto exit; + if (dvb_text[0] == 0x10) { + if (dvb_text_length < 3) + goto exit; + + used = 3; + uint16_t ext = (dvb_text[1] << 8) | dvb_text[2]; + switch(ext) { + case 0x01: + charset = "ISO8859-1"; + break; + case 0x02: + charset = "ISO8859-2"; + break; + case 0x03: + charset = "ISO8859-3"; + break; + case 0x04: + charset = "ISO8859-4"; + break; + case 0x05: + charset = "ISO8859-5"; + break; + case 0x06: + charset = "ISO8859-6"; + break; + case 0x07: + charset = "ISO8859-7"; + break; + case 0x08: + charset = "ISO8859-8"; + break; + case 0x09: + charset = "ISO8859-9"; + break; + case 0x0a: + charset = "ISO8859-10"; + break; + case 0x0b: + charset = "ISO8859-11"; + break; + case 0x0d: + charset = "ISO8859-13"; + break; + case 0x0e: + charset = "ISO8859-14"; + break; + case 0x0f: + charset = "ISO8859-15"; + break; + default: + used = 0; + break; + } + } else { + used = 1; + switch(dvb_text[0]) { + case 0x01: + charset = "ISO8859-5"; + break; + case 0x02: + charset = "ISO8859-6"; + break; + case 0x03: + charset = "ISO8859-7"; + break; + case 0x04: + charset = "ISO8859-8"; + break; + case 0x05: + charset = "ISO8859-9"; + break; + case 0x06: + charset = "ISO8859-10"; + break; + case 0x07: + charset = "ISO8859-11"; + break; + case 0x09: + charset = "ISO8859-13"; + break; + case 0x0a: + charset = "ISO8859-14"; + break; + case 0x0b: + charset = "ISO8859-15"; + break; + case 0x11: + charset = "UTF16"; + break; + case 0x12: + charset = "EUC-KR"; + break; + case 0x13: + charset = "GB2312"; + break; + case 0x14: + charset = "GBK"; + break; + case 0x15: + charset = "UTF8"; + break; + default: + used = 0; + break; + } + } +exit: + *consumed = used; + return charset; +} |