gstreamer/gst/gstbus.h
Wim Taymans 1c1af875d4 GstBusHandler -> GstBusFunc, return value has the same meaning as any other GSource (FALSE == remove source).
Original commit message from CVS:
* check/gst/gstbin.c: (pop_messages), (GST_START_TEST):
* check/gst/gstbus.c: (message_func_eos), (message_func_app),
(send_messages), (GST_START_TEST), (gstbus_suite):
* check/gst/gstpipeline.c: (GST_START_TEST):
* check/pipelines/cleanup.c: (run_pipeline):
* check/pipelines/simple_launch_lines.c: (run_pipeline),
(GST_START_TEST):
* gst/gstbus.c: (gst_bus_have_pending), (gst_bus_source_prepare),
(gst_bus_source_check), (gst_bus_source_dispatch),
(gst_bus_create_watch), (gst_bus_add_watch_full),
(gst_bus_add_watch), (poll_func), (poll_timeout), (gst_bus_poll):
* gst/gstbus.h:
* tools/gst-launch.c: (event_loop):
* tools/gst-md5sum.c: (event_loop):
GstBusHandler -> GstBusFunc, return value has the same meaning as
any other GSource (FALSE == remove source).
_add_watch() and _add_watch_full() now take a MessageType mask to
only handle specific types of messages.
_poll() returns the GstMessage instead of the message type to avoid
race conditions.
_have_pending() takes a MessageType mask now too.
Added testsuite for multiple bus watches.
Fix testsuites and applications for new bus API.
2005-09-19 11:18:03 +00:00

140 lines
4.5 KiB
C

/* GStreamer
* Copyright (C) 2004 Wim Taymans <wim@fluendo.com>
*
* gstbus.h: Header for GstBus subsystem
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library 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
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef __GST_BUS_H__
#define __GST_BUS_H__
typedef struct _GstBus GstBus;
typedef struct _GstBusClass GstBusClass;
#include <gst/gstmessage.h>
#include <gst/gstclock.h>
G_BEGIN_DECLS
/* --- standard type macros --- */
#define GST_TYPE_BUS (gst_bus_get_type ())
#define GST_BUS(bus) (G_TYPE_CHECK_INSTANCE_CAST ((bus), GST_TYPE_BUS, GstBus))
#define GST_IS_BUS(bus) (G_TYPE_CHECK_INSTANCE_TYPE ((bus), GST_TYPE_BUS))
#define GST_BUS_CLASS(bclass) (G_TYPE_CHECK_CLASS_CAST ((bclass), GST_TYPE_BUS, GstBusClass))
#define GST_IS_BUS_CLASS(bclass) (G_TYPE_CHECK_CLASS_TYPE ((bclass), GST_TYPE_BUS))
#define GST_BUS_GET_CLASS(bus) (G_TYPE_INSTANCE_GET_CLASS ((bus), GST_TYPE_BUS, GstBusClass))
#define GST_BUS_CAST(bus) ((GstBus*)(bus))
typedef enum {
GST_BUS_FLUSHING = GST_OBJECT_FLAG_LAST,
GST_BUS_FLAG_LAST = GST_OBJECT_FLAG_LAST + 1
} GstBusFlags;
typedef enum
{
GST_BUS_DROP = 0, /* drop message */
GST_BUS_PASS = 1, /* pass message to async queue */
GST_BUS_ASYNC = 2, /* pass message to async queue, continue if message is handled */
} GstBusSyncReply;
/**
* GstBusSyncHandler:
* @bus: the #GstBus that sent the message
* @message: the #GstMessage
* @data: user data that has been given, when registering the handler
*
* Handler will be invoked synchronously, when a new message has been injected
* into the bus. This function is mostly used internally. Only one sync handler
* can be attached to a given bus.
*
* Returns: #GstBusSyncReply stating what to do with the message
*/
typedef GstBusSyncReply (*GstBusSyncHandler) (GstBus * bus, GstMessage * message, gpointer data);
/**
* GstBusFunc:
* @bus: the #GstBus that sent the message
* @message: the #GstMessage
* @data: user data that has been given, when registering the handler
*
* Specifies the type of function passed to #gst_bus_add_watch() or
* #gst_bus_add_watch_full(), which is called from the mainloop when a message
* is available on the bus.
*
* The message passed to the function will be unreffed after execution of this
* function so it should not be freed in the function.
*
* Returns: %FALSE if the event source should be removed.
*/
typedef gboolean (*GstBusFunc) (GstBus * bus, GstMessage * message, gpointer data);
struct _GstBus
{
GstObject object;
/*< private > */
GQueue *queue;
GMutex *queue_lock;
GstBusSyncHandler sync_handler;
gpointer sync_handler_data;
/*< private > */
gpointer _gst_reserved[GST_PADDING];
};
struct _GstBusClass
{
GstObjectClass parent_class;
/*< private > */
gpointer _gst_reserved[GST_PADDING];
};
GType gst_bus_get_type (void);
GstBus* gst_bus_new (void);
gboolean gst_bus_post (GstBus * bus, GstMessage * message);
gboolean gst_bus_have_pending (GstBus * bus, GstMessageType events);
GstMessage * gst_bus_peek (GstBus * bus);
GstMessage * gst_bus_pop (GstBus * bus);
void gst_bus_set_flushing (GstBus * bus, gboolean flushing);
void gst_bus_set_sync_handler (GstBus * bus, GstBusSyncHandler func,
gpointer data);
GSource * gst_bus_create_watch (GstBus * bus, GstMessageType events);
guint gst_bus_add_watch_full (GstBus * bus,
gint priority,
GstMessageType events,
GstBusFunc func,
gpointer user_data,
GDestroyNotify notify);
guint gst_bus_add_watch (GstBus * bus,
GstMessageType events,
GstBusFunc func,
gpointer user_data);
GstMessage* gst_bus_poll (GstBus *bus, GstMessageType events,
GstClockTimeDiff timeout);
G_END_DECLS
#endif /* __GST_BUS_H__ */