client.h File Reference

#include <stdint.h>
#include <libngf/proplist.h>

Go to the source code of this file.

Typedefs
typedef enum _NgfTransport	NgfTransport
typedef enum _NgfEventState	NgfEventState
typedef struct _NgfClient	NgfClient
	Internal client structure.
typedef void(*	NgfCallback) (NgfClient *client, uint32_t id, NgfEventState state, void *userdata)
	Event state callback for receiving event completion status (failed, completed)

Enumerations
enum	_NgfTransport { NGF_TRANSPORT_DBUS , NGF_TRANSPORT_INTERNAL }
enum	_NgfEventState { NGF_EVENT_FAILED = 0 , NGF_EVENT_COMPLETED = 1 , NGF_EVENT_PLAYING = 2 , NGF_EVENT_PAUSED = 3 }

Functions
NgfClient *	ngf_client_create (NgfTransport transport,...)
	Create a client instance to play events.
void	ngf_client_destroy (NgfClient *client)
	Free the clients resources.
void	ngf_client_set_callback (NgfClient *client, NgfCallback callback, void *userdata)
	Set a callback to receive event completion updates.
uint32_t	ngf_client_play_event (NgfClient *client, const char *event, NgfProplist *proplist)
	Play event with optional properties.
void	ngf_client_stop_event (NgfClient *client, uint32_t id)
	Stop an active event.
void	ngf_client_pause_event (NgfClient *client, uint32_t id)
	Pause active event.
void	ngf_client_resume_event (NgfClient *client, uint32_t id)
	Resume paused event.

Typedef Documentation

NgfCallback

typedef void(* NgfCallback) (NgfClient *client, uint32_t id, NgfEventState state, void *userdata)

Event state callback for receiving event completion status (failed, completed)

NgfClient

typedef struct _NgfClient NgfClient

Internal client structure.

NgfEventState

typedef enum _NgfEventState NgfEventState

NgfTransport

typedef enum _NgfTransport NgfTransport

Enumeration Type Documentation

_NgfEventState

enum _NgfEventState

Enumerator
NGF_EVENT_FAILED	Event fails when we are unable to get resources for it or we just can't play it.
NGF_EVENT_COMPLETED	Event is completed when the event has been played or cancelled by higher priority event.
NGF_EVENT_PLAYING	Event is in playing state when playback is successfully started or continued.
NGF_EVENT_PAUSED	Event is in paused state when pause is called.

_NgfTransport

enum _NgfTransport

Enumerator
NGF_TRANSPORT_DBUS	DBus transport is the only supported transport currently.
NGF_TRANSPORT_INTERNAL	Reserved for internal use.

Function Documentation

ngf_client_create()

NgfClient * ngf_client_create	(	NgfTransport	transport,
			... )

Create a client instance to play events.

Parameters

transport	NgfTransport. Currently only NGF_TRANSPORT_DBUS supported.
...	Variable arguments passed to transports.

Returns

NgfClient instance or NULL on error.

DBusConnection *conn = dbus_bus_get (DBUS_BUS_SYSTEM, NULL);
dbus_connection_setup_with_g_main (conn, NULL);
 
NgfClient *client = ngf_client_create (NGF_TRANSPORT_DBUS, conn);
if (!client) {
    fprintf (stderr, "Failed to create client!");
}

ngf_client_destroy()

void ngf_client_destroy

(

NgfClient *

client

)

Free the clients resources.

Parameters

client

NgfClient instance

ngf_client_pause_event()

void ngf_client_pause_event	(	NgfClient *	client,
		uint32_t	id )

Pause active event.

Parameters

client	NgfClient instance
id	Event id.

ngf_client_play_event()

uint32_t ngf_client_play_event	(	NgfClient *	client,
		const char *	event,
		NgfProplist *	proplist )

Play event with optional properties.

Parameters

client	NgfClient instance
event	Event identifier
proplist	NgfProplist or NULL.

Returns

Id of the event

NgfProplist *p = NULL;
uint32_t id = 0;
 
p = ngf_proplist_new ();
ngf_proplist_sets (p, "audio", "/usr/share/sounds/beep.wav");
 
id = ngf_client_play_event (client, "my.event", p);
if (id == 0) {
    fprintf (stderr, "Failed to play event!");
}
 
ngf_proplist_free (p);

ngf_client_resume_event()

void ngf_client_resume_event	(	NgfClient *	client,
		uint32_t	id )

Resume paused event.

Parameters

client	NgfClient instance
id	Event id.

ngf_client_set_callback()

void ngf_client_set_callback	(	NgfClient *	client,
		NgfCallback	callback,
		void *	userdata )

Set a callback to receive event completion updates.

Parameters

client	NgfClient instance
callback	Callback function,

See also

NgfCallback

Parameters

userdata

Userdata

ngf_client_stop_event()

void ngf_client_stop_event	(	NgfClient *	client,
		uint32_t	id )

Stop an active event.

Parameters

client	NgfClient instance
id	Event id. If no such event, nothing is done.