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vdr/eit.c
Klaus Schmidinger e18918ad06 Fixed an occasional segfault in the EIT processor
2001-02-24 12:12:58 +01:00

1346 lines
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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 1.12 2001/02/24 12:12:58 kls Exp $
***************************************************************************/
#include "eit.h"
#include <ctype.h>
#include <dvb_comcode.h>
#include <dvb_v4l.h>
#include <fcntl.h>
#include <fstream.h>
#include <iomanip.h>
#include <iostream.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <sys/ioctl.h>
#include <sys/poll.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <time.h>
#include <unistd.h>
#include "config.h"
#include "videodir.h"
// --- cMJD ------------------------------------------------------------------
class cMJD {
public:
cMJD();
cMJD(u_char date_hi, u_char date_lo);
cMJD(u_char date_hi, u_char date_lo, u_char timehr, u_char timemi, u_char timese);
~cMJD();
/** */
void ConvertToTime();
/** */
bool SetSystemTime();
/** */
time_t GetTime_t();
protected: // Protected attributes
/** */
time_t mjdtime;
protected: // Protected attributes
/** */
u_char time_second;
protected: // Protected attributes
/** */
u_char time_minute;
protected: // Protected attributes
/** */
u_char time_hour;
protected: // Protected attributes
/** */
u_short mjd;
};
cMJD::cMJD()
{
}
cMJD::cMJD(u_char date_hi, u_char date_lo)
{
mjd = date_hi << 8 | date_lo;
time_hour = time_minute = time_second = 0;
ConvertToTime();
}
cMJD::cMJD(u_char date_hi, u_char date_lo, u_char timehr, u_char timemi, u_char timese)
{
mjd = date_hi << 8 | date_lo;
time_hour = timehr;
time_minute = timemi;
time_second = timese;
ConvertToTime();
}
cMJD::~cMJD()
{
}
/** */
void cMJD::ConvertToTime()
{
struct tm t;
t.tm_sec = time_second;
t.tm_min = time_minute;
t.tm_hour = time_hour;
int k;
t.tm_year = (int) ((mjd - 15078.2) / 365.25);
t.tm_mon = (int) ((mjd - 14956.1 - (int)(t.tm_year * 365.25)) / 30.6001);
t.tm_mday = (int) (mjd - 14956 - (int)(t.tm_year * 365.25) - (int)(t.tm_mon * 30.6001));
k = (t.tm_mon == 14 || t.tm_mon == 15) ? 1 : 0;
t.tm_year = t.tm_year + k;
t.tm_mon = t.tm_mon - 1 - k * 12;
t.tm_mon--;
t.tm_isdst = -1;
t.tm_gmtoff = 0;
mjdtime = timegm(&t);
//isyslog(LOG_INFO, "Time parsed = %s\n", ctime(&mjdtime));
}
/** */
bool cMJD::SetSystemTime()
{
struct tm *ptm;
time_t loctim;
ptm = localtime(&mjdtime);
loctim = time(NULL);
if (abs(mjdtime - loctim) > 2)
{
isyslog(LOG_INFO, "System Time = %s (%ld)\n", ctime(&loctim), loctim);
isyslog(LOG_INFO, "Local Time = %s (%ld)\n", ctime(&mjdtime), mjdtime);
if (stime(&mjdtime) < 0)
esyslog(LOG_ERR, "ERROR while setting system time: %m");
return true;
}
return false;
}
/** */
time_t cMJD::GetTime_t()
{
return mjdtime;
}
// --- cTDT ------------------------------------------------------------------
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 utc_date_hi : 8;
u_char utc_date_lo : 8;
u_char utc_hour : 4;
u_char utc_hour_ten : 4;
u_char utc_min : 4;
u_char utc_min_ten : 4;
u_char utc_sec : 4;
u_char utc_sec_ten : 4;
} tdt_t;
class cTDT {
public:
cTDT(tdt_t *ptdt);
~cTDT();
/** */
bool SetSystemTime();
protected: // Protected attributes
/** */
tdt_t tdt;
/** */
cMJD * mjd;
};
cTDT::cTDT(tdt_t *ptdt)
{
tdt = *ptdt;
mjd = new cMJD(tdt.utc_date_hi, tdt.utc_date_lo,
tdt.utc_hour_ten * 10 + tdt.utc_hour,
tdt.utc_min_ten * 10 + tdt.utc_min,
tdt.utc_sec_ten * 10 + tdt.utc_sec);
}
cTDT::~cTDT()
{
}
/** */
bool cTDT::SetSystemTime()
{
return mjd->SetSystemTime();
}
// --- cEventInfo ------------------------------------------------------------
cEventInfo::cEventInfo(unsigned short serviceid, unsigned short eventid)
{
pTitle = NULL;
pSubtitle = NULL;
pExtendedDescription = NULL;
bIsPresent = bIsFollowing = false;
lDuration = 0;
tTime = 0;
uEventID = eventid;
uServiceID = serviceid;
cExtendedDescriptorNumber = 0;
nChannelNumber = 0;
}
cEventInfo::~cEventInfo()
{
delete pTitle;
delete pSubtitle;
delete pExtendedDescription;
}
/** */
const char * cEventInfo::GetTitle() const
{
return pTitle;
}
/** */
const char * cEventInfo::GetSubtitle() const
{
return pSubtitle;
}
/** */
const char * cEventInfo::GetExtendedDescription() const
{
return pExtendedDescription;
}
/** */
bool cEventInfo::IsPresent() const
{
return bIsPresent;
}
/** */
void cEventInfo::SetPresent(bool pres)
{
bIsPresent = pres;
}
/** */
bool cEventInfo::IsFollowing() const
{
return bIsFollowing;
}
/** */
void cEventInfo::SetFollowing(bool foll)
{
bIsFollowing = foll;
}
/** */
const char * cEventInfo::GetDate() const
{
static char szDate[25];
strftime(szDate, sizeof(szDate), "%d.%m.%Y", localtime(&tTime));
return szDate;
}
/** */
const char * cEventInfo::GetTimeString() const
{
static char szTime[25];
strftime(szTime, sizeof(szTime), "%R", localtime(&tTime));
return szTime;
}
/** */
const char * cEventInfo::GetEndTimeString() const
{
static char szEndTime[25];
time_t tEndTime = tTime + lDuration;
strftime(szEndTime, sizeof(szEndTime), "%R", localtime(&tEndTime));
return szEndTime;
}
/** */
time_t cEventInfo::GetTime() const
{
return tTime;
}
/** */
long cEventInfo::GetDuration() const
{
return lDuration;
}
/** */
unsigned short cEventInfo::GetEventID() const
{
return uEventID;
}
/** */
bool cEventInfo::SetTitle(char *string)
{
if (string == NULL)
return false;
pTitle = strdup(string);
if (pTitle == NULL)
return false;
return true;
}
/** */
bool cEventInfo::SetSubtitle(char *string)
{
if (string == NULL)
return false;
pSubtitle = strdup(string);
if (pSubtitle == NULL)
return false;
return true;
}
/** */
bool cEventInfo::AddExtendedDescription(char *string)
{
int size = 0;
bool first = true;
char *p;
if (string == NULL)
return false;
if (pExtendedDescription)
{
first = false;
size += strlen(pExtendedDescription);
}
size += (strlen(string) + 1);
p = (char *)realloc(pExtendedDescription, size);
if (p == NULL)
return false;
if (first)
*p = 0;
strcat(p, string);
pExtendedDescription = p;
return true;
}
/** */
void cEventInfo::SetTime(time_t t)
{
tTime = t;
}
/** */
void cEventInfo::SetDuration(long l)
{
lDuration = l;
}
/** */
void cEventInfo::SetEventID(unsigned short evid)
{
uEventID = evid;
}
/** */
void cEventInfo::SetServiceID(unsigned short servid)
{
uServiceID = servid;
}
/** */
u_char cEventInfo::GetExtendedDescriptorNumber() const
{
return cExtendedDescriptorNumber;
}
/** */
void cEventInfo::IncreaseExtendedDescriptorNumber()
{
cExtendedDescriptorNumber++;
}
/** */
unsigned short cEventInfo::GetServiceID() const
{
return uServiceID;
}
/** */
void cEventInfo::Dump(FILE *f) const
{
if (tTime + lDuration >= time(NULL)) {
fprintf(f, "E %u %ld %ld\n", uEventID, tTime, lDuration);
if (!isempty(pTitle))
fprintf(f, "T %s\n", pTitle);
if (!isempty(pSubtitle))
fprintf(f, "S %s\n", pSubtitle);
if (!isempty(pExtendedDescription))
fprintf(f, "D %s\n", pExtendedDescription);
fprintf(f, "e\n");
}
}
// --- cSchedule -------------------------------------------------------------
cSchedule::cSchedule(unsigned short servid)
{
pPresent = pFollowing = NULL;
uServiceID = servid;
}
cSchedule::~cSchedule()
{
}
/** */
const cEventInfo * cSchedule::GetPresentEvent() const
{
// checking temporal sanity of present event (kls 2000-11-01)
time_t now = time(NULL);
if (pPresent && !(pPresent->GetTime() <= now && now <= pPresent->GetTime() + pPresent->GetDuration()))
{
cEventInfo *pe = Events.First();
while (pe != NULL)
{
if (pe->GetTime() <= now && now <= pe->GetTime() + pe->GetDuration())
return pe;
pe = Events.Next(pe);
}
}
return pPresent;
}
/** */
const cEventInfo * cSchedule::GetFollowingEvent() const
{
// checking temporal sanity of following event (kls 2000-11-01)
time_t now = time(NULL);
const cEventInfo *pr = GetPresentEvent(); // must have it verified!
if (pFollowing && !(pr && pr->GetTime() + pr->GetDuration() <= pFollowing->GetTime()))
{
int minDt = INT_MAX;
cEventInfo *pe = Events.First(), *pf = NULL;
while (pe != NULL)
{
int dt = pe->GetTime() - now;
if (dt > 0 && dt < minDt)
{
minDt = dt;
pf = pe;
}
pe = Events.Next(pe);
}
return pf;
}
return pFollowing;
}
/** */
void cSchedule::SetServiceID(unsigned short servid)
{
uServiceID = servid;
}
/** */
unsigned short cSchedule::GetServiceID() const
{
return uServiceID;
}
/** */
const cEventInfo * cSchedule::GetEvent(unsigned short uEventID) const
{
cEventInfo *pe = Events.First();
while (pe != NULL)
{
if (pe->GetEventID() == uEventID)
return pe;
pe = Events.Next(pe);
}
return NULL;
}
/** */
const cEventInfo * cSchedule::GetEvent(time_t tTime) const
{
cEventInfo *pe = Events.First();
while (pe != NULL)
{
if (pe->GetTime() == tTime)
return pe;
pe = Events.Next(pe);
}
return NULL;
}
/** */
bool cSchedule::SetPresentEvent(cEventInfo *pEvent)
{
if (pPresent != NULL)
pPresent->SetPresent(false);
pPresent = pEvent;
pPresent->SetPresent(true);
return true;
}
/** */
bool cSchedule::SetFollowingEvent(cEventInfo *pEvent)
{
if (pFollowing != NULL)
pFollowing->SetFollowing(false);
pFollowing = pEvent;
pFollowing->SetFollowing(true);
return true;
}
/** */
void cSchedule::Cleanup()
{
Cleanup(time(NULL));
}
/** */
void cSchedule::Cleanup(time_t tTime)
{
cEventInfo *pEvent;
for (int a = 0; true ; a++)
{
pEvent = Events.Get(a);
if (pEvent == NULL)
break;
if (pEvent->GetTime() + pEvent->GetDuration() < tTime)
{
Events.Del(pEvent);
a--;
}
}
}
/** */
void cSchedule::Dump(FILE *f) const
{
cChannel *channel = Channels.GetByServiceID(uServiceID);
if (channel)
{
fprintf(f, "C %u %s\n", uServiceID, channel->name);
for (cEventInfo *p = Events.First(); p; p = Events.Next(p))
p->Dump(f);
fprintf(f, "c\n");
}
}
// --- cSchedules ------------------------------------------------------------
cSchedules::cSchedules()
{
pCurrentSchedule = NULL;
uCurrentServiceID = 0;
}
cSchedules::~cSchedules()
{
}
/** */
bool cSchedules::SetCurrentServiceID(unsigned short servid)
{
pCurrentSchedule = GetSchedule(servid);
if (pCurrentSchedule == NULL)
{
Add(new cSchedule(servid));
pCurrentSchedule = GetSchedule(servid);
if (pCurrentSchedule == NULL)
return false;
}
uCurrentServiceID = servid;
return true;
}
/** */
const cSchedule * cSchedules::GetSchedule() const
{
return pCurrentSchedule;
}
/** */
const cSchedule * cSchedules::GetSchedule(unsigned short servid) const
{
cSchedule *p;
p = First();
while (p != NULL)
{
if (p->GetServiceID() == servid)
return p;
p = Next(p);
}
return NULL;
}
/** */
void cSchedules::Cleanup()
{
cSchedule *p;
p = First();
while (p != NULL)
{
p->Cleanup(time(NULL));
p = Next(p);
}
}
/** */
void cSchedules::Dump(FILE *f) const
{
for (cSchedule *p = First(); p; p = Next(p))
p->Dump(f);
}
// --- cEIT ------------------------------------------------------------------
#define DEC(N) dec << setw(N) << setfill(int('0'))
#define HEX(N) hex << setw(N) << setfill(int('0'))
#define EIT_STUFFING_DESCRIPTOR 0x42
#define EIT_LINKAGE_DESCRIPTOR 0x4a
#define EIT_SHORT_EVENT_DESCRIPTOR 0x4d
#define EIT_EXTENDED_EVENT_DESCRIPTOR 0x4e
#define EIT_TIME_SHIFTED_EVENT_DESCRIPTOR 0x4f
#define EIT_COMPONENT_DESCRIPTOR 0x50
#define EIT_CA_IDENTIFIER_DESCRIPTOR 0x53
#define EIT_CONTENT_DESCRIPTOR 0x54
#define EIT_PARENTAL_RATING_DESCRIPTOR 0x55
#define EIT_TELEPHONE_DESCRIPTOR 0x57
#define EIT_MULTILINGUAL_COMPONENT_DESCRIPTOR 0x5e
#define EIT_PRIVATE_DATE_SPECIFIER_DESCRIPTOR 0x5f
#define EIT_SHORT_SMOOTHING_BUFFER_DESCRIPTOR 0x61
#define EIT_DATA_BROADCAST_DESCRIPTOR 0x64
#define EIT_PDC_DESCRIPTOR 0x69
typedef struct eit_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;
typedef struct eit_loop_struct {
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 : 4;
u_char dur_hour_ten : 4;
u_char dur_minute : 4;
u_char dur_minute_ten : 4;
u_char dur_second : 4;
u_char dur_second_ten : 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;
} eit_loop_t;
typedef struct eit_short_event_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;
} eit_short_event_t;
typedef struct eit_extended_event_struct {
u_char descriptor_tag : 8;
u_char descriptor_length : 8;
u_char last_descriptor_number : 4;
u_char descriptor_number : 4;
u_char language_code_1 : 8;
u_char language_code_2 : 8;
u_char language_code_3 : 8;
u_char length_of_items : 8;
} eit_extended_event_t;
typedef struct eit_content_descriptor {
u_char descriptor_tag : 8;
u_char descriptor_length : 8;
} eit_content_descriptor_t;
typedef struct eit_content_loop {
u_char content_nibble_level_2 : 4;
u_char content_nibble_level_1 : 4;
u_char user_nibble_2 : 4;
u_char user_nibble_1 : 4;
} eit_content_loop_t;
class cEIT {
private:
cSchedules *schedules;
public:
cEIT(void *buf, int length, cSchedules *Schedules);
~cEIT();
/** */
int ProcessEIT();
protected: // Protected methods
/** */
int strdvbcpy(unsigned char *dst, unsigned char *src, int max);
/** returns true if this EIT covers a
present/following information, false if it's
schedule information */
bool IsPresentFollowing();
/** */
bool WriteShortEventDescriptor(unsigned short service, eit_loop_t *eitloop, u_char *buf);
/** */
bool WriteExtEventDescriptor(unsigned short service, eit_loop_t *eitloop, u_char *buf);
protected: // Protected attributes
int buflen;
protected: // Protected attributes
/** */
u_char buffer[4097];
/** Table ID of this EIT struct */
u_char tid;
/** EITs service id (program number) */
u_short pid;
};
cEIT::cEIT(void * buf, int length, cSchedules *Schedules)
{
buflen = length < int(sizeof(buffer)) ? length : sizeof(buffer);
memset(buffer, 0, sizeof(buffer));
memcpy(buffer, buf, buflen);
tid = buffer[0];
schedules = Schedules;
}
cEIT::~cEIT()
{
}
/** */
int cEIT::ProcessEIT()
{
int bufact = 0;
eit_t *eit;
eit_loop_t *eitloop;
u_char tmp[256];
if (bufact + (int)sizeof(eit_t) > buflen)
return 0;
eit = (eit_t *)buffer;
bufact += sizeof(eit_t);
unsigned int service = (eit->service_id_hi << 8) | eit->service_id_lo;
while(bufact + (int)sizeof(eit_loop_t) <= buflen)
{
eitloop = (eit_loop_t *)&buffer[bufact];
bufact += sizeof(eit_loop_t);
int descdatalen = (eitloop->descriptors_loop_length_hi << 8) + eitloop->descriptors_loop_length_lo;
int descdataact = 0;
while (descdataact < descdatalen && bufact < buflen)
{
switch (buffer[bufact])
{
eit_content_descriptor_t *cont;
eit_content_loop_t *contloop;
case EIT_STUFFING_DESCRIPTOR :
//dsyslog(LOG_INFO, "Found EIT_STUFFING_DESCRIPTOR");
break;
case EIT_LINKAGE_DESCRIPTOR :
//dsyslog(LOG_INFO, "Found EIT_LINKAGE_DESCRIPTOR");
break;
case EIT_SHORT_EVENT_DESCRIPTOR:
WriteShortEventDescriptor(service, eitloop, &buffer[bufact]);
break;
case EIT_EXTENDED_EVENT_DESCRIPTOR:
WriteExtEventDescriptor(service, eitloop, &buffer[bufact]);
break;
case EIT_TIME_SHIFTED_EVENT_DESCRIPTOR :
//dsyslog(LOG_INFO, "Found EIT_TIME_SHIFTED_EVENT_DESCRIPTOR");
break;
case EIT_COMPONENT_DESCRIPTOR :
if (buffer[bufact + 1] > 6) // kls 2001-02-24: otherwise strncpy() causes a segfault in strdvbcpy()
strdvbcpy(tmp, &buffer[bufact + 8], buffer[bufact + 1] - 6);
//dsyslog(LOG_INFO, "Found EIT_COMPONENT_DESCRIPTOR %c%c%c 0x%02x/0x%02x/0x%02x '%s'\n", buffer[bufact + 5], buffer[bufact + 6], buffer[bufact + 7], buffer[2], buffer[3], buffer[4], tmp);
break;
case EIT_CA_IDENTIFIER_DESCRIPTOR :
//dsyslog(LOG_INFO, "Found EIT_CA_IDENTIFIER_DESCRIPTOR");
break;
case EIT_CONTENT_DESCRIPTOR :
cont = (eit_content_descriptor_t *)buffer;
contloop = (eit_content_loop_t *)&buffer[sizeof(eit_content_descriptor_t)];
//dsyslog(LOG_INFO, "Found EIT_CONTENT_DESCRIPTOR 0x%02x/0x%02x\n", contloop->content_nibble_level_1, contloop->content_nibble_level_2);
break;
case EIT_PARENTAL_RATING_DESCRIPTOR :
//dsyslog(LOG_INFO, "Found EIT_PARENTAL_RATING_DESCRIPTOR");
break;
case EIT_TELEPHONE_DESCRIPTOR :
//dsyslog(LOG_INFO, "Found EIT_TELEPHONE_DESCRIPTOR");
break;
case EIT_MULTILINGUAL_COMPONENT_DESCRIPTOR :
//dsyslog(LOG_INFO, "Found EIT_MULTILINGUAL_COMPONENT_DESCRIPTOR");
break;
case EIT_PRIVATE_DATE_SPECIFIER_DESCRIPTOR :
//dsyslog(LOG_INFO, "Found EIT_PRIVATE_DATE_SPECIFIER_DESCRIPTOR");
break;
case EIT_SHORT_SMOOTHING_BUFFER_DESCRIPTOR :
//dsyslog(LOG_INFO, "Found EIT_SHORT_SMOOTHING_BUFFER_DESCRIPTOR");
break;
case EIT_DATA_BROADCAST_DESCRIPTOR :
//dsyslog(LOG_INFO, "Found EIT_DATA_BROADCAST_DESCRIPTOR");
break;
case EIT_PDC_DESCRIPTOR :
//dsyslog(LOG_INFO, "Found EIT_PDC_DESCRIPTOR");
break;
default:
//dsyslog(LOG_INFO, "Found unhandled descriptor 0x%02x with length of %04d\n", (int)buffer[bufact], (int)buffer[bufact + 1]);
break;
}
descdataact += (buffer[bufact + 1] + 2);
bufact += (buffer[bufact + 1] + 2);
}
}
return 0;
}
/** */
int cEIT::strdvbcpy(unsigned char *dst, unsigned char *src, int max)
{
int a = 0;
// kls 2001-02-24: if we come in with negative values, the caller must
// have done something wrong and the strncpy() below will cause a segfault
if (max <= 0)
{
*dst = 0;
return 0;
}
if (*src == 0x05 || (*src >= 0x20 && *src <= 0xff))
{
for (a = 0; a < max; a++)
{
if (*src == 0)
break;
if ((*src >= ' ' && *src <= '~') || (*src >= 0xa0 && *src <= 0xff))
*dst++ = *src++;
else
{
// if ((*src > '~' && *src < 0xa0) || *src == 0xff)
// cerr << "found special character 0x" << HEX(2) << (int)*src << endl;
src++;
}
}
*dst = 0;
}
else
{
const char *ret;
switch (*src)
{
case 0x01: ret = "Coding according to character table 1"; break;
case 0x02: ret = "Coding according to character table 2"; break;
case 0x03: ret = "Coding according to character table 3"; break;
case 0x04: ret = "Coding according to character table 4"; break;
case 0x10: ret = "Coding according to ISO/IEC 8859"; break;
case 0x11: ret = "Coding according to ISO/IEC 10646"; break;
case 0x12: ret = "Coding according to KSC 5601"; break;
default: ret = "Unknown coding"; break;
}
strncpy((char *)dst, ret, max);
}
return a;
}
/** returns true if this EIT covers a
present/following information, false if it's
schedule information */
bool cEIT::IsPresentFollowing()
{
if (tid == 0x4e || tid == 0x4f)
return true;
return false;
}
/** */
bool cEIT::WriteShortEventDescriptor(unsigned short service, eit_loop_t *eitloop, u_char *buf)
{
u_char tmp[256];
eit_short_event_t *evt = (eit_short_event_t *)buf;
unsigned short eventid = (unsigned short)((eitloop->event_id_hi << 8) | eitloop->event_id_lo);
cEventInfo *pEvent;
//isyslog(LOG_INFO, "Found Short Event Descriptor");
cSchedule *pSchedule = (cSchedule *)schedules->GetSchedule(service);
if (pSchedule == NULL)
{
schedules->Add(new cSchedule(service));
pSchedule = (cSchedule *)schedules->GetSchedule(service);
if (pSchedule == NULL)
return false;
}
/* cSchedule::GetPresentEvent() and cSchedule::GetFollowingEvent() verify
the temporal sanity of these events, so calling them here appears to
be a bad idea... (kls 2000-11-01)
//
// if we are working on a present/following info, let's see whether
// we already have present/following info for this service and if yes
// check whether it's the same eventid, if yes, just return, nothing
// left to do.
//
if (IsPresentFollowing())
{
if (eitloop->running_status == 4 || eitloop->running_status == 3)
pEvent = (cEventInfo *)pSchedule->GetPresentEvent();
else
pEvent = (cEventInfo *)pSchedule->GetFollowingEvent();
if (pEvent != NULL)
if (pEvent->GetEventID() == eventid)
return true;
}
*/
//
// let's see whether we have that eventid already
// in case not, we have to create a new cEventInfo for it
//
pEvent = (cEventInfo *)pSchedule->GetEvent(eventid);
if (pEvent == NULL)
{
pSchedule->Events.Add(new cEventInfo(service, eventid));
pEvent = (cEventInfo *)pSchedule->GetEvent(eventid);
if (pEvent == NULL)
return false;
strdvbcpy(tmp, &buf[sizeof(eit_short_event_t)], evt->event_name_length);
pEvent->SetTitle((char *)tmp);
strdvbcpy(tmp, &buf[sizeof(eit_short_event_t) + evt->event_name_length + 1],
(int)buf[sizeof(eit_short_event_t) + evt->event_name_length]);
pEvent->SetSubtitle((char *)tmp);
cMJD mjd(eitloop->date_hi, eitloop->date_lo,
eitloop->time_hour_ten * 10 + eitloop->time_hour,
eitloop->time_minute_ten * 10 + eitloop->time_minute,
eitloop->time_second_ten * 10 + eitloop->time_second);
pEvent->SetTime(mjd.GetTime_t());
pEvent->SetDuration((long)((long)((eitloop->dur_hour_ten * 10 + eitloop->dur_hour) * 60l * 60l) +
(long)((eitloop->dur_minute_ten * 10 + eitloop->dur_minute) * 60l) +
(long)(eitloop->dur_second_ten * 10 + eitloop->dur_second)));
}
if (IsPresentFollowing())
{
if (eitloop->running_status == 4 || eitloop->running_status == 3)
pSchedule->SetPresentEvent(pEvent);
else if (eitloop->running_status == 1 || eitloop->running_status == 2 || eitloop->running_status == 0)
pSchedule->SetFollowingEvent(pEvent);
}
return true;
}
/** */
bool cEIT::WriteExtEventDescriptor(unsigned short service, eit_loop_t *eitloop, u_char *buf)
{
u_char tmp[256];
eit_extended_event_t *evt = (eit_extended_event_t *)buf;
int bufact, buflen;
unsigned short eventid = (unsigned short)((eitloop->event_id_hi << 8) | eitloop->event_id_lo);
cEventInfo *pEvent;
//isyslog(LOG_INFO, "Found Extended Event Descriptor");
cSchedule *pSchedule = (cSchedule *)schedules->GetSchedule(service);
if (pSchedule == NULL)
{
schedules->Add(new cSchedule(service));
pSchedule = (cSchedule *)schedules->GetSchedule(service);
if (pSchedule == NULL)
return false;
}
pEvent = (cEventInfo *)pSchedule->GetEvent(eventid);
if (pEvent == NULL)
return false;
if (evt->descriptor_number != pEvent->GetExtendedDescriptorNumber())
return false;
bufact = sizeof(eit_extended_event_t);
buflen = buf[1] + 2;
if (evt->length_of_items > 0)
{
while (bufact - sizeof(eit_extended_event_t) < evt->length_of_items)
{
strdvbcpy(tmp, &buf[bufact + 1], (int)buf[bufact]);
// could use value in tmp now to do something,
// haven't seen any items as of yet transmitted from satellite
bufact += (buf[bufact] + 1);
}
}
strdvbcpy(tmp, &buf[bufact + 1], (int)buf[bufact]);
if (pEvent->AddExtendedDescription((char *)tmp))
{
pEvent->IncreaseExtendedDescriptorNumber();
return true;
}
return false;
}
// --- cSIProcessor ----------------------------------------------------------
#define MAX_FILTERS 20
int cSIProcessor::numSIProcessors = 0;
cSchedules *cSIProcessor::schedules = NULL;
cMutex cSIProcessor::schedulesMutex;
/** */
cSIProcessor::cSIProcessor(const char *FileName)
{
masterSIProcessor = numSIProcessors == 0; // the first one becomes the 'master'
useTStime = false;
filters = NULL;
if ((fsvbi = open(FileName, O_RDONLY)) >= 0)
{
if (!numSIProcessors++) // the first one creates it
schedules = new cSchedules;
filters = (SIP_FILTER *)calloc(MAX_FILTERS, sizeof(SIP_FILTER));
}
else
LOG_ERROR_STR(FileName);
}
cSIProcessor::~cSIProcessor()
{
if (fsvbi >= 0)
{
Cancel();
ShutDownFilters();
delete filters;
if (!--numSIProcessors) // the last one deletes it
delete schedules;
close(fsvbi);
}
}
/** use the vbi device to parse all relevant SI
information and let the classes corresponding
to the tables write their information to the disk */
void cSIProcessor::Action()
{
if (fsvbi < 0) {
esyslog(LOG_ERR, "cSIProcessor::Action() called without open file - returning");
return;
}
dsyslog(LOG_INFO, "EIT processing thread started (pid=%d)%s", getpid(), masterSIProcessor ? " - master" : "");
unsigned char buf[4096+1]; // max. allowed size for any EIT section (+1 for safety ;-)
unsigned int seclen;
unsigned int pid;
time_t lastCleanup = time(NULL);
time_t lastDump = time(NULL);
struct pollfd pfd;
while(true)
{
if (masterSIProcessor)
{
time_t now = time(NULL);
struct tm *ptm = localtime(&now);
if (now - lastCleanup > 3600 && ptm->tm_hour == 5)
{
LOCK_THREAD;
schedulesMutex.Lock();
isyslog(LOG_INFO, "cleaning up schedules data");
schedules->Cleanup();
schedulesMutex.Unlock();
lastCleanup = now;
}
if (now - lastDump > 600)
{
LOCK_THREAD;
schedulesMutex.Lock();
FILE *f = fopen(AddDirectory(VideoDirectory, "epg.data"), "w");
if (f) {
schedules->Dump(f);
fclose(f);
}
lastDump = now;
schedulesMutex.Unlock();
}
}
/* wait data become ready from the bitfilter */
pfd.fd = fsvbi;
pfd.events = POLLIN;
if(poll(&pfd, 1, 1000) != 0) /* timeout is 5 secs */
{
// fprintf(stderr, "<data>\n");
/* read section */
read(fsvbi, buf, 8);
seclen = (buf[6] << 8) | buf[7];
pid = (buf[4] << 8) | buf[5];
read(fsvbi, buf, seclen);
//dsyslog(LOG_INFO, "Received pid 0x%02x with table ID 0x%02x and length of %04d\n", pid, buf[0], seclen);
switch (pid)
{
case 0x14:
if (buf[0] == 0x70)
{
if (useTStime)
{
cTDT ctdt((tdt_t *)buf);
ctdt.SetSystemTime();
}
}
/*XXX this comes pretty often:
else
dsyslog(LOG_INFO, "Time packet was not 0x70 but 0x%02x\n", (int)buf[0]);
XXX*/
break;
case 0x12:
if (buf[0] != 0x72)
{
LOCK_THREAD;
schedulesMutex.Lock();
cEIT ceit(buf, seclen, schedules);
ceit.ProcessEIT();
schedulesMutex.Unlock();
}
else
dsyslog(LOG_INFO, "Received stuffing section in EIT\n");
break;
default:
break;
}
}
else
{
LOCK_THREAD;
//XXX this comes pretty often
//isyslog(LOG_INFO, "Received timeout from poll, refreshing filters\n");
RefreshFilters();
}
// WakeUp();
}
}
/** Add a filter with packet identifier pid and
table identifer tid */
bool cSIProcessor::AddFilter(u_char pid, u_char tid)
{
if (fsvbi < 0)
return false;
int section = ((int)tid << 8) | 0x00ff;
struct bitfilter filt = {
pid,
{ section, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000,
0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000, 0x0000},
SECTION_CONTINUOS, 0,
FILTER_MEM,
{},
};
if (ioctl(fsvbi, VIDIOCSBITFILTER, &filt) < 0)
return false;
for (int a = 0; a < MAX_FILTERS; a++)
{
if (filters[a].inuse == false)
{
filters[a].pid = pid;
filters[a].tid = tid;
filters[a].handle = filt.handle;
filters[a].inuse = true;
// dsyslog(LOG_INFO, " Registered filter handle %04x, pid = %02d, tid = %02d", filters[a].handle, filters[a].pid, filters[a].tid);
return true;
}
}
return false;
}
/** set whether local systems time should be
set by the received TDT or TOT packets */
bool cSIProcessor::SetUseTSTime(bool use)
{
useTStime = use;
return useTStime;
}
/** */
bool cSIProcessor::ShutDownFilters()
{
if (fsvbi < 0)
return false;
bool ret = true;
for (int a = 0; a < MAX_FILTERS; a++)
{
if (filters[a].inuse == true)
{
if (ioctl(fsvbi, VIDIOCSSHUTDOWNFILTER, &filters[a].handle) < 0)
ret = false;
// dsyslog(LOG_INFO, "Deregistered filter handle %04x, pid = %02d, tid = %02d", filters[a].handle, filters[a].pid, filters[a].tid);
filters[a].inuse = false;
}
}
return ret;
}
/** */
bool cSIProcessor::SetCurrentServiceID(unsigned short servid)
{
LOCK_THREAD;
return schedules ? schedules->SetCurrentServiceID(servid) : false;
}
/** */
bool cSIProcessor::RefreshFilters()
{
if (fsvbi < 0)
return false;
bool ret = true;
ret = ShutDownFilters();
for (int a = 0; a < MAX_FILTERS; a++)
{
if (filters[a].inuse == false && filters[a].pid != 0 && filters[a].tid != 0)
{
if (!AddFilter(filters[a].pid, filters[a].tid))
ret = false;
}
}
return ret;
}
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