optimize epg for less memory consumption,

add RESULT return values to lookupEvent,
we need still a python interface for query the epgcache

1 files changed, 60 insertions, 32 deletions

diff --git a/lib/dvb/epgcache.h b/lib/dvb/epgcache.h
index 1da612de..8a62325d 100644
--- a/lib/dvb/epgcache.h
+++ b/lib/dvb/epgcache.h
@@ -104,45 +104,39 @@ struct hash_uniqueEPGKey
 	#define tidMap std::hash_map<__u32, hash_32, equal_32>
 #endif
 
+#define descriptorPair std::pair<int,__u8*>
+#define descriptorMap std::map<__u32, descriptorPair >
+
 class eventData
 {
  	friend class eEPGCache;
 private:
 	__u8* EITdata;
 	int ByteSize;
+	static descriptorMap descriptors;
 public:
 	int type;
 	static int CacheSize;
-	eventData(const eit_event_struct* e, int size, int type)
-	:ByteSize(size), type(type)
-	{
-		CacheSize+=size;
-		EITdata = new __u8[size];
-		if (e)
-			memcpy(EITdata, (__u8*) e, size);
-	}
-	~eventData()
-	{
-		CacheSize-=ByteSize;
-		delete [] EITdata;
-	}
+	static void load(FILE *);
+	static void save(FILE *);
+	eventData(const eit_event_struct* e, int size, int type);
+	~eventData();
+	const eit_event_struct* get() const;
 	operator const eit_event_struct*() const
 	{
-		return (const eit_event_struct*) EITdata;
-	}
-	const eit_event_struct* get() const
-	{
-		return (const eit_event_struct*) EITdata;
+		return get();
 	}
 	int getEventID()
 	{
-		return HILO( ((const eit_event_struct*) EITdata)->event_id );
+		return (EITdata[0] << 8) | EITdata[1];
 	}
 	time_t getStartTime()
 	{
-		return parseDVBtime(
-			EITdata[2], EITdata[3],
-			EITdata[4], EITdata[5], EITdata[6]);
+		return parseDVBtime(EITdata[2], EITdata[3], EITdata[4], EITdata[5], EITdata[6]);
+	}
+	int getDuration()
+	{
+		return fromBCD(EITdata[7])*3600+fromBCD(EITdata[8])*60+fromBCD(EITdata[9]);
 	}
 };
 
@@ -239,30 +233,64 @@ public:
 	// called from main thread
 	inline void Lock();
 	inline void Unlock();
-	Event *lookupEvent(const eServiceReferenceDVB &service, int event_id, bool plain=false );
-	Event *lookupEvent(const eServiceReferenceDVB &service, time_t=0, bool plain=false );
-	const eventMap* getEventMap(const eServiceReferenceDVB &service);
-	const timeMap* getTimeMap(const eServiceReferenceDVB &service);
+
+	// result Event * must be deleted by caller of lookupEvent
+	inline RESULT lookupEvent(const eServiceReferenceDVB &service, int event_id, Event *& );
+	inline RESULT lookupEvent(const eServiceReferenceDVB &service, time_t , Event *& );
+
+	// methods for faster use.. but not thread save ..
+	// Lock and Unlock should be used !!
+	RESULT lookupEvent(const eServiceReferenceDVB &service, int event_id, const eventData *& );
+	RESULT lookupEvent(const eServiceReferenceDVB &service, time_t , const eventData *& );
+
+	inline RESULT getEventMap(const eServiceReferenceDVB &service, const eventMap *& );
+	inline RESULT getTimeMap(const eServiceReferenceDVB &service, const timeMap *& );
 };
 
 TEMPLATE_TYPEDEF(ePtr<eEPGCache>,eEPGCachePtr);
 
-inline const eventMap* eEPGCache::getEventMap(const eServiceReferenceDVB &service)
+inline RESULT eEPGCache::lookupEvent(const eServiceReferenceDVB &service, time_t t, Event *& result )
+{
+	const eventData *data=0;
+	RESULT ret = lookupEvent(service, t, data);
+	if ( !ret && data )
+		result = new Event((uint8_t*)data->get());
+	return ret;
+}
+
+inline RESULT eEPGCache::lookupEvent(const eServiceReferenceDVB &service, int event_id, Event *& result)
+{
+	const eventData *data=0;
+	RESULT ret = lookupEvent(service, event_id, data);
+	if ( !ret && data )
+		result = new Event((uint8_t*)data->get());
+	return ret;
+}
+
+inline RESULT eEPGCache::getEventMap(const eServiceReferenceDVB &service, const eventMap *& result)
 {
 	eventCache::iterator It = eventDB.find( service );
 	if ( It != eventDB.end() && It->second.first.size() )
-		return &(It->second.first);
-	else
+	{
+		result=&(It->second.first);
 		return 0;
+	}
+	else
+		result=0;
+	return -1;
 }
 
-inline const timeMap* eEPGCache::getTimeMap(const eServiceReferenceDVB &service)
+inline RESULT eEPGCache::getTimeMap(const eServiceReferenceDVB &service, const timeMap *& result)
 {
 	eventCache::iterator It = eventDB.find( service );
 	if ( It != eventDB.end() && It->second.second.size() )
-		return &(It->second.second);
-	else
+	{
+		result=&(It->second.second);
 		return 0;
+	}
+	else
+		result=0;
+	return -1;
 }
 
 inline void eEPGCache::Lock()