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/*
Copyright (C) 2009 Adam Charrett
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.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
patprocessor.c
Process Program Association Tables and update the services information.
*/
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <stdint.h>
#include <assert.h>
#include "multiplexes.h"
#include "services.h"
#include "dvbadapter.h"
#include "ts.h"
#include "standard/mpeg2.h"
#include "patprocessor.h"
#include "cache.h"
#include "logging.h"
#include "main.h"
#include "list.h"
/*******************************************************************************
* Typedefs *
*******************************************************************************/
struct PATProcessor_s
{
TSFilterGroup_t *tsgroup;
Multiplex_t *multiplex;
dvbpsi_handle pathandle;
};
/*******************************************************************************
* Prototypes *
*******************************************************************************/
static void PATProcessorFilterEventCallback(void *userArg, struct TSFilterGroup_t *group, TSFilterEventType_e event, void *details);
static void PATHandler(void* arg, dvbpsi_pat_t* newpat);
/*******************************************************************************
* Global variables *
*******************************************************************************/
static char PATPROCESSOR[] = "PATProcessor";
static Event_t patEvent = NULL;
/*******************************************************************************
* Global functions *
*******************************************************************************/
PATProcessor_t PATProcessorCreate(TSReader_t *reader)
{
PATProcessor_t state;
if (patEvent == NULL)
{
patEvent = EventsRegisterEvent(MPEG2EventSource, "PAT", NULL);
}
ObjectRegisterClass("PATProcessor_t", sizeof(struct PATProcessor_s), NULL);
state = ObjectCreateType(PATProcessor_t);
if (state)
{
state->tsgroup = TSReaderCreateFilterGroup(reader, PATPROCESSOR, MPEG2FilterType, PATProcessorFilterEventCallback, state);
}
return state;
}
void PATProcessorDestroy(PATProcessor_t processor)
{
TSFilterGroupDestroy(processor->tsgroup);
if (processor->multiplex)
{
dvbpsi_DetachPAT(processor->pathandle);
MultiplexRefDec(processor->multiplex);
}
ObjectRefDec(processor);
}
/*******************************************************************************
* Local Functions *
*******************************************************************************/
static void PATProcessorFilterEventCallback(void *userArg, struct TSFilterGroup_t *group, TSFilterEventType_e event, void *details)
{
PATProcessor_t state= (PATProcessor_t)userArg;
if (event == TSFilterEventType_MuxChanged)
{
if (state->multiplex)
{
MultiplexRefDec(state->multiplex);
TSFilterGroupRemoveSectionFilter(state->tsgroup, 0);
dvbpsi_DetachPAT(state->pathandle);
}
state->multiplex = details;
if (details)
{
MultiplexRefInc(state->multiplex);
state->pathandle = dvbpsi_AttachPAT(PATHandler, (void*)state);
TSFilterGroupAddSectionFilter(state->tsgroup, 0, -1, state->pathandle);
}
}
}
static void PATHandler(void* arg, dvbpsi_pat_t* newpat)
{
PATProcessor_t state = (PATProcessor_t)arg;
Multiplex_t *multiplex = state->multiplex;
int count,i;
Service_t **services;
dvbpsi_pat_program_t *patentry;
LogModule(LOG_DEBUG, PATPROCESSOR, "PAT recieved, version %d (old version %d)\n", newpat->i_version, multiplex->patVersion);
if (multiplex->patVersion == -1)
{
/* Cause a TS Structure change call back*/
state->tsgroup->tsReader->tsStructureChanged = TRUE;
}
/* Version has changed update the services */
for (patentry = newpat->p_first_program; patentry; patentry = patentry->p_next)
{
LogModule(LOG_DEBUG, PATPROCESSOR, "Service 0x%04x PMT PID 0x%04x\n", patentry->i_number, patentry->i_pid);
if (patentry->i_number != 0x0000)
{
Service_t *service = CacheServiceFindId(patentry->i_number);
if (!service)
{
LogModule(LOG_DEBUG, PATPROCESSOR, "Service not found in cache while processing PAT, adding 0x%04x\n", patentry->i_number);
service = CacheServiceAdd(patentry->i_number, patentry->i_number);
/* Cause a TS Structure change call back*/
state->tsgroup->tsReader->tsStructureChanged = TRUE;
}
else
{
CacheServiceSeen(service, TRUE, TRUE);
}
if (service && (service->pmtPID != patentry->i_pid))
{
CacheUpdateServicePMTPID(service, patentry->i_pid);
}
if (service)
{
ServiceRefDec(service);
}
}
}
/* Delete any services that no longer exist */
services = CacheServicesGet(&count);
for (i = 0; i < count; i ++)
{
bool found = FALSE;
for (patentry = newpat->p_first_program; patentry; patentry = patentry->p_next)
{
if (services[i]->id == patentry->i_number)
{
found = TRUE;
break;
}
}
if (!found)
{
LogModule(LOG_DEBUG, PATPROCESSOR, "Service not found in PAT while checking cache, deleting 0x%04x (%s)\n",
services[i]->id, services[i]->name);
if (!CacheServiceSeen(services[i], FALSE, TRUE))
{
CacheServicesRelease();
CacheServiceDelete(services[i]);
services = CacheServicesGet(&count);
i --;
/* Cause a TS Structure change call back*/
state->tsgroup->tsReader->tsStructureChanged = TRUE;
}
}
}
CacheServicesRelease();
CacheUpdateMultiplex(multiplex, newpat->i_version, newpat->i_ts_id);
EventsFireEventListeners(patEvent, newpat);
ObjectRefDec(newpat);
}
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