Added EIT support for current/next display0.6.2

1 files changed, 530 insertions, 0 deletions

diff --git a/eit.c b/eit.c
new file mode 100644
index 00000000..c4c12003
--- /dev/null
+++ b/eit.c
@@ -0,0 +1,530 @@
+/***************************************************************************
+                          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;
+}