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+/***************************************************************************
+ eit.c - description
+ -------------------
+ begin : Fri Aug 25 2000
+ copyright : (C) 2000 by Robert Schneider
+ email : Robert.Schneider@web.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. *
+ * *
+ * $Id: eit.c 1.1 2000/09/03 10:22:25 kls Exp $
+ ***************************************************************************/
+
+#include "eit.h"
+#include <iostream.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <time.h>
+#include <sys/poll.h>
+#include <sys/ioctl.h>
+#include <dvb_comcode.h>
+#include "tools.h"
+
+typedef struct {
+ u_char table_id : 8;
+
+#if BYTE_ORDER == BIG_ENDIAN
+ u_char section_syntax_indicator : 1;
+ u_char : 3;
+ u_char section_length_hi : 4;
+#else
+ u_char section_length_hi : 4;
+ u_char : 3;
+ u_char section_syntax_indicator : 1;
+#endif
+
+ u_char section_length_lo : 8;
+
+ u_char service_id_hi : 8;
+ u_char service_id_lo : 8;
+
+#if BYTE_ORDER == BIG_ENDIAN
+ u_char : 2;
+ u_char version_number : 5;
+ u_char current_next_indicator : 1;
+#else
+ u_char current_next_indicator : 1;
+ u_char version_number : 5;
+ u_char : 2;
+#endif
+
+ u_char section_number : 8;
+ u_char last_section_number : 8;
+ u_char transport_stream_id_hi : 8;
+ u_char transport_stream_id_lo : 8;
+ u_char original_network_id_hi : 8;
+ u_char original_network_id_lo : 8;
+ u_char segment_last_section_number : 8;
+ u_char segment_last_table_id : 8;
+} eit_t;
+
+#define EIT_SIZE 14
+
+struct eit_loop_struct1 {
+ u_char event_id_hi : 8;
+ u_char event_id_lo : 8;
+
+ u_char date_hi : 8;
+ u_char date_lo : 8;
+ u_char time_hour : 4;
+ u_char time_hour_ten : 4;
+ u_char time_minute : 4;
+ u_char time_minute_ten : 4;
+ u_char time_second : 4;
+ u_char time_second_ten : 4;
+
+ u_char dur_hour_ten : 4;
+ u_char dur_hour : 4;
+ u_char dur_minute_ten : 4;
+ u_char dur_minute : 4;
+ u_char dur_second_ten : 4;
+ u_char dur_second : 4;
+
+#if BYTE_ORDER == BIG_ENDIAN
+ u_char running_status : 3;
+ u_char free_ca_mode : 1;
+ u_char descriptors_loop_length_hi : 4;
+#else
+ u_char descriptors_loop_length_hi : 4;
+ u_char free_ca_mode : 1;
+ u_char running_status : 3;
+#endif
+
+ u_char descriptors_loop_length_lo : 8;
+};
+
+#define EIT_SHORT_EVENT_DESCRIPTOR 0x4d
+#define EIT_SHORT_EVENT_DESCRIPTOR_SIZE 6
+
+struct eit_short_event_descriptor_struct {
+ u_char descriptor_tag : 8;
+ u_char descriptor_length : 8;
+
+ u_char language_code_1 : 8;
+ u_char language_code_2 : 8;
+ u_char language_code_3 : 8;
+
+ u_char event_name_length : 8;
+};
+
+#define EIT_EXTENDED_EVENT_DESCRIPOR 0x4e
+
+#define EIT_DESCRIPTOR_SIZE
+
+typedef struct eit_event_struct {
+ u_char event_id_hi : 8;
+ u_char event_id_lo : 8;
+
+ u_char start_time_1 : 8;
+ u_char start_time_2 : 8;
+ u_char start_time_3 : 8;
+ u_char start_time_4 : 8;
+ u_char start_time_5 : 8;
+
+ u_char duration_1 : 8;
+ u_char duration_2 : 8;
+ u_char duration_3 : 8;
+
+#if BYTE_ORDER == BIG_ENDIAN
+ u_char running_status : 3;
+ u_char free_CA_mode : 1;
+ u_char descriptors_loop_length_hi : 4;
+#else
+ u_char descriptors_loop_length_hi : 4;
+ u_char free_CA_mode : 1;
+ u_char running_status : 3;
+#endif
+
+ u_char descriptors_loop_length_lo : 8;
+
+} eit_event_t;
+#define EIT_LOOP_SIZE 12
+
+
+typedef struct tot_t {
+ u_char table_id : 8;
+
+#if BYTE_ORDER == BIG_ENDIAN
+ u_char section_syntax_indicator : 1;
+ u_char : 3;
+ u_char section_length_hi : 4;
+#else
+ u_char section_length_hi : 4;
+ u_char : 3;
+ u_char section_syntax_indicator : 1;
+#endif
+
+ u_char date_hi : 8;
+ u_char date_lo : 8;
+ u_char time_hour : 4;
+ u_char time_hour_ten : 4;
+ u_char time_minute : 4;
+ u_char time_minute_ten : 4;
+ u_char time_second : 4;
+ u_char time_second_ten : 4;
+
+#if BYTE_ORDER == BIG_ENDIAN
+ u_char : 4;
+ u_char descriptor_loop_length_hi : 4;
+#else
+ u_char descriptor_loop_length_hi : 4;
+ u_char : 4;
+#endif
+
+ u_char descriptor_loop_length_lo : 8;
+} tot_t;
+
+typedef struct local_time_offset {
+
+ u_char descriptor_tag : 8;
+ u_char descriptor_length : 8;
+
+ u_char language_code_1 : 8;
+ u_char language_code_2 : 8;
+ u_char language_code_3 : 8;
+
+ u_char : 8;
+
+ u_char offset_hour : 4;
+ u_char offset_hour_ten : 4;
+ u_char offset_minute : 4;
+ u_char offset_minute_ten : 4;
+
+ u_char change_date_hi : 8;
+ u_char change_date_lo : 8;
+ u_char change_time_hour : 4;
+ u_char change_time_hour_ten : 4;
+ u_char change_time_minute : 4;
+ u_char change_time_minute_ten : 4;
+ u_char change_time_second : 4;
+ u_char change_time_second_ten : 4;
+
+ u_char next_offset_hour : 4;
+ u_char next_offset_hour_ten : 4;
+ u_char next_offset_minute : 4;
+ u_char next_offset_minute_ten : 4;
+} local_time_offset;
+
+cEIT::cEIT()
+{
+ cszBitFilter = "/dev/vbi";
+ if((fsvbi = open(cszBitFilter, O_RDWR))<0)
+ {
+ fsvbi = 0;
+ esyslog(LOG_ERR, "Failed to open DVB bitfilter device: %s", cszBitFilter);
+ return;
+ }
+}
+
+cEIT::~cEIT()
+{
+ if (fsvbi != 0)
+ close(fsvbi);
+ fsvbi = 0;
+}
+
+/** Set the bitfilter in vbi device to return
+correct tables */
+int cEIT::SetBitFilter(unsigned short pid, unsigned short section, unsigned short mode)
+{
+ struct bitfilter filt = {
+ pid,
+ { section, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
+ 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000},
+ mode,0,
+ FILTER_MEM,
+ {},
+ };
+
+ if (ioctl(fsvbi, VIDIOCSBITFILTER, &filt) < 0)
+ return 0xffff;
+ return 0;
+}
+/** */
+int cEIT::GetSection(unsigned char *buf, ushort PID, unsigned char sec)
+{
+ int seclen=0;
+ unsigned short handle, pid;
+ unsigned char section, sectionnum=0xff, maxsec=0;
+ struct pollfd pfd;
+
+ if ((handle = SetBitFilter(PID, (sec<<8)|0x00ff, SECTION_CONTINUOS))==0xffff)
+ return -1;
+
+ seclen=0;
+ pfd.fd=fsvbi;
+ pfd.events=POLLIN;
+ if (poll(&pfd, 1, 20000)==0)
+ {
+ //cerr << "Timeout\n";
+ return -1;
+ }
+
+ read(fsvbi, buf, 8);
+ seclen=(buf[6]<<8)|buf[7];
+ pid=(buf[4]<<8)|buf[5];
+
+ read(fsvbi, buf, seclen);
+ section=buf[0];
+ sectionnum=buf[6];
+ maxsec=buf[7];
+
+ //cerr << "secnum: " << HEX(2) << (int)sectionnum
+ // << ", secmax: " << HEX(2) << (int) msecnum << "\n";
+
+ CloseFilter(handle);
+
+ return seclen;
+}
+
+/** */
+int cEIT::CloseFilter(unsigned short handle)
+{
+ if (ioctl(fsvbi, VIDIOCSSHUTDOWNFILTER, &handle)<0)
+ return -1;
+ return 0;
+}
+
+/** */
+char * cEIT::mjd2string(unsigned short mjd)
+{
+ int y, m, d, k;
+ static char buf[20];
+
+ y = (int) ((mjd - 15078.2) / 365.25);
+ m = (int) ((mjd - 14956.1 - (int)(y * 365.25)) / 30.6001);
+ d = (int) (mjd - 14956 - (int)(y * 365.25) - (int)(m * 30.6001));
+ k = (m == 14 || m == 15) ? 1 : 0;
+ y = y + k;
+ m = m - 1 - k * 12;
+ sprintf(buf, "%d.%d.%4d", d, m, y + 1900);
+
+ return(buf);
+}
+
+/** */
+int cEIT::GetEIT()
+{
+ unsigned char buf[1024];
+ eit_t *eit;
+ struct eit_loop_struct1 *eitloop;
+ struct eit_short_event_descriptor_struct *eitevt;
+ int seclen;
+ unsigned short handle, pid;
+ struct pollfd pfd;
+ eit_event * pevt = (eit_event *)0;
+ time_t tstart;
+
+ if ((handle = SetBitFilter(0x12, (0x4e << 8) | 0x00ff, SECTION_CONTINUOS))==0xffff)
+ {
+ return -1;
+ }
+/*
+ pid_t process = fork();
+ if (process < 0)
+ {
+ cerr << "GetEIT -1" << endl;
+ return -1;
+ }
+
+ if (process != 0)
+ {
+ cerr << "GetEIT 0" << endl;
+ return 0;
+ }
+*/
+ int nReceivedEITs = 0;
+ tstart = time(NULL);
+ while ((!evtRunning.bIsValid || !evtNext.bIsValid) && nReceivedEITs < 20 && difftime(time(NULL), tstart) < 4)
+ {
+ pfd.fd=fsvbi;
+ pfd.events=POLLIN;
+ if (poll(&pfd, 1, 5000)==0)
+ {
+ //cerr << "Timeout\n";
+ CloseFilter(handle);
+ return -1;
+ }
+
+ read(fsvbi, buf, 8);
+ seclen=(buf[6]<<8)|buf[7];
+ pid=(buf[4]<<8)|buf[5];
+
+ read(fsvbi, buf, seclen);
+
+ if (seclen < (int)(sizeof(eit_t)
+ + sizeof(struct eit_loop_struct1)
+ + sizeof(struct eit_short_event_descriptor_struct)))
+ continue;
+
+ eit = (eit_t *)buf;
+ eitloop = (struct eit_loop_struct1 *)&eit[1];
+ eitevt = (struct eit_short_event_descriptor_struct *)&eitloop[1];
+
+ if (eitevt->descriptor_tag != EIT_SHORT_EVENT_DESCRIPTOR)
+ {
+ // printf("Tag = '%c'\n", eitevt->descriptor_tag);
+ continue;
+ }
+
+ if (((eit->service_id_hi << 8) | eit->service_id_lo) != uProgramNumber)
+ {
+ // printf("Wrong program %04x need %04x\n", (eit->service_id_hi << 8) | eit->service_id_lo, uProgramNumber);
+ continue;
+ }
+
+ nReceivedEITs++;
+
+ pevt = (eit_event *)0;
+ if (eitloop->running_status == 4 | eitloop->running_status == 3)
+ pevt = (eit_event *)&evtRunning;
+ else if (eitloop->running_status == 1 || eitloop->running_status == 2 || eitloop->running_status == 0)
+ pevt = (eit_event *)&evtNext;
+
+ if (pevt)
+ {
+ unsigned char *p = (unsigned char *)&eitevt[1];
+ strdvbcpy((unsigned char *)pevt->szTitle, p, eitevt->event_name_length);
+ pevt->szSubTitle[0] = 0;
+ strdvbcpy((unsigned char *)pevt->szSubTitle, &p[eitevt->event_name_length+1], (int)p[eitevt->event_name_length]);
+ strcpy(pevt->szDate, mjd2string((eitloop->date_hi << 8) + eitloop->date_lo));
+ int hr = eitloop->time_hour + (eitloop->time_hour_ten * 10);
+ hr += 2;
+ if (hr >=24)
+ {
+ hr -= 24;
+ // need to switch date one day ahead here
+ }
+ sprintf(pevt->szTime, "%d:%c%c", hr,
+ eitloop->time_minute_ten + '0',
+ eitloop->time_minute + '0');
+ pevt->bIsValid = true;
+ }
+ }
+
+ CloseFilter(handle);
+
+ return 1;
+}
+
+/** */
+int cEIT::SetProgramNumber(unsigned short pnr)
+{
+ if (pnr == 0)
+ {
+ evtRunning.bIsValid = false;
+ evtNext.bIsValid = false;
+ return -1;
+ }
+
+ if (pnr != uProgramNumber)
+ {
+ evtRunning.bIsValid = false;
+ evtNext.bIsValid = false;
+ uProgramNumber = pnr;
+ return GetEIT();
+ }
+ return (IsValid() ? 1 : -1);
+}
+
+/** retrieves the string for the running title */
+char * cEIT::GetRunningTitle()
+{
+ if (evtRunning.bIsValid)
+ return evtRunning.szTitle;
+ else
+ return "---";
+}
+/** Retrieves the string for the running subtitle */
+char * cEIT::GetRunningSubtitle()
+{
+ if (evtRunning.bIsValid)
+ return evtRunning.szSubTitle;
+ else
+ return "---";
+}
+/** Retrieves the string representing the
+date of the current event
+ */
+char * cEIT::GetRunningDate()
+{
+ if (evtRunning.bIsValid)
+ return evtRunning.szDate;
+ else
+ return "---";
+}
+/** Retrieves the string representing the
+time of the current event */
+char * cEIT::GetRunningTime()
+{
+ if (evtRunning.bIsValid)
+ return evtRunning.szTime;
+ else
+ return "---";
+}
+/** retrieves the string for the running title */
+char * cEIT::GetNextTitle()
+{
+ if (evtNext.bIsValid)
+ return evtNext.szTitle;
+ else
+ return "---";
+}
+/** Retrieves the string for the running subtitle */
+char * cEIT::GetNextSubtitle()
+{
+ if (evtNext.bIsValid)
+ return evtNext.szSubTitle;
+ else
+ return "---";
+}
+/** Retrieves the string representing the
+date of the current event
+ */
+char * cEIT::GetNextDate()
+{
+ if (evtNext.bIsValid)
+ return evtNext.szDate;
+ else
+ return "---";
+}
+/** Retrieves the string representing the
+time of the current event */
+char * cEIT::GetNextTime()
+{
+ if (evtNext.bIsValid)
+ return evtNext.szTime;
+ else
+ return "---";
+}
+
+/** */
+bool cEIT::IsValid()
+{
+ return (evtRunning.bIsValid && evtNext.bIsValid);
+}
+
+/** */
+int cEIT::strdvbcpy(unsigned char *dst, unsigned char *src, int max)
+{
+ int a;
+ for (a = 0; a < max; a++)
+ {
+ if (*src == 0)
+ break;
+
+ if ((*src >= ' ' && *src <= '~') || (*src >= 0xa0 && *src <= 0xff))
+ *dst++ = *src++;
+ else
+ src++;
+ }
+ *dst = 0;
+ return a;
+}
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