MSFilters

Name

MSFilters -- The basic mediastreamer element.

Synopsis

#include <msfilter.h>


struct      MSFilter;
int         ms_filter_add_link              (MSFilter *m1,
                                             MSFilter *m2);

Description

MSFilter is the base class for all mediastreamer processing filters: codec compression, soundcard read, souncard write, etc... MSFilter objects have to be linked between them to form a processing chain, that is then attached to a MSSync object (synchronisation source) in order to be scheduled for processing.

Details

struct MSFilter

struct MSFilter {

	struct _MSFilterClass *klass;
	GMutex *lock;
	guchar finputs;   /* number of connected fifo inputs*/
	guchar foutputs;  /* number of connected fifo outputs*/
	guchar qinputs;   /* number of connected queue inputs*/
	guchar qoutputs;  /* number of connected queue outputs*/
	gint min_fifo_size; /* set when linking*/
	gint r_mingran;				/* read minimum granularity (for fifos).
					It can be zero so that the filter can accept any size of reading data*/
	MSFifo **infifos; /*pointer to a table of pointer to input fifos*/
	MSFifo **outfifos;  /*pointer to a table of pointer to output fifos*/
	MSQueue **inqueues;  /*pointer to a table of pointer to input queues*/
	MSQueue **outqueues;  /*pointer to a table of pointer to output queues*/
	MSFilterNotifyFunc notify_event;
	gpointer userdata;
};

Only programmers implementing derivated objects of MSFilter are interested by the content of the structure.

struct _MSFilterClass *`klass`	Pointer to the class structure.
GMutex *`lock`
guchar `finputs`	Number of fifo inputs currently in use.
guchar `foutputs`	Number of fifo outputs currently in use.
guchar `qinputs`	Number of queue inputs currently in use.
guchar `qoutputs`	Number of queue outputs currently in use.
gint `min_fifo_size`
gint `r_mingran`
MSFifo **`infifos`	Pointer to a table of fifo inputs
MSFifo **`outfifos`	Pointer to a table of ffo ouputs
MSQueue **`inqueues`	Pointer to a table of queue inputs
MSQueue **`outqueues`	Pointer to a table of queue qoutputs
MSFilterNotifyFunc `notify_event`
gpointer `userdata`

ms_filter_add_link ()

int         ms_filter_add_link              (MSFilter *m1,
                                             MSFilter *m2);

`m1` :
`m2` :
Returns :