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DVBStreamer - Plugins Ideas
Load all plugins found in a certain directory.
Plugin can add commands.
Plugin can add Processors/Filters.
Plugin can add output methods.
struct Plugin_t
{
unsigned int RequiredVersion;
char *name; /* Name of the plugin */
char *version; /* String describing the version of the plugin */
char *description; /* Description of the plugin */
char *author; /* Author/Contact address for bugs */
Command_t *commands; /* NULL terminated array of commands or NULL for no commands */
PluginFeature_t *features; /* A PLUGIN_FEATURE_NONE terminated list of features or NULL for no features. */
}
struct Command_t
{
char *command;
bool tokenise;
int minargs;
int maxargs;
char *shorthelp;
char *longhelp;
void (*commandfunc)(int argc, char **argv);
}
PLUGIN_FEATURE_TYPE_NONE 0x00
PLUGIN_FEATURE_TYPE_FILTER 0x01
PLUGIN_FEATURE_TYPE_PATPROCESSOR 0x02
PLUGIN_FEATURE_TYPE_PMTPROCESSOR 0x03
PLUGIN_FEATURE_TYPE_DELIVERYMETHOD 0x04
PLUGIN_FEATURE_TYPE_CHANNELCHANGE 0x05
struct PluginFeature_t
{
int type;
void *details;
}
type = PLUGIN_FEATURE_TYPE_FILTER
details = An instance of the following structure:
struct FilterHandler_t
{
void (*InitFilter)(PIDFilter_t* filter);
void (*DeInitFilter)(PIDFilter_t* filter);
}
type = PLUGIN_FEATURE_TYPE_PATPROCESSOR
details = A function pointer to a function with the following prototype:
void PluginPATProcessor(dvbpsi_pat_t* newpat);
type = PLUGIN_FEATURE_TYPE_PMTPROCESSOR
details = A function pointer to a function with the following prototype:
void PluginPMTProcessor(dvbpsi_pmt_t* newpmt);
type = PLUGIN_FEATURE_TYPE_DELIVERYMETHOD
details = An instance of the following structure
struct DeliveryMethodHandler_t
{
void (*CanHandle)(char *mrl);
DeliveryMethodInstance_t* (*CreateInstance)(char *mrl);
}
mrl's will be in the form <delivery method>://<url>[,<options>]
For example udp could be (ppd == Packets Per Datagram)
udp://localhost:1234,tos=25,ppd=7
Implementors should consider the following structure as the 'base class' and
should extend it with the state they require for the output method.
struct DeliveryMethodInstance_t
{
void (*SendPacket)(DeliveryMethodInstance *this, TSPacket_t packet);
void (*DestroyInstance)(DeliveryMethodInstance_t *this);
}
For example:
struct UDPOutputDeliveryMethodInstance_t
{
void (*SendPacket)(DeliveryMethodInstance_t *this, TSPacket_t packet);
void (*DestroyInstance)(DeliveryMethodInstance_t *this);
int tos;
int packetsPerDatagram;
Socket socketFD;
int packetCount;
char *buffer;
}
type = PLUGIN_FEATURE_TYPE_CHANNELCHANGE
details = A function pointer to a function with the following prototype:
void PluginChannelChanged(Multiplex_t *newMultiplex, Service_t *newService);
PluginChannelChanged function pointer will be called every time the primary service
filter is updated. newMultiplex will contain the current multiplex and newService
will contain the currentService.
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