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132 lines
4.2 KiB
C
132 lines
4.2 KiB
C
/* GStreamer
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* Copyright (C) 2004 Wim Taymans <wim@fluendo.com>
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*
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* gstbus.h: Header for GstBus subsystem
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifndef __GST_BUS_H__
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#define __GST_BUS_H__
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typedef struct _GstBus GstBus;
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typedef struct _GstBusClass GstBusClass;
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#include <gst/gstmessage.h>
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#include <gst/gstclock.h>
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G_BEGIN_DECLS
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/* --- standard type macros --- */
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#define GST_TYPE_BUS (gst_bus_get_type ())
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#define GST_BUS(bus) (G_TYPE_CHECK_INSTANCE_CAST ((bus), GST_TYPE_BUS, GstBus))
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#define GST_IS_BUS(bus) (G_TYPE_CHECK_INSTANCE_TYPE ((bus), GST_TYPE_BUS))
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#define GST_BUS_CLASS(bclass) (G_TYPE_CHECK_CLASS_CAST ((bclass), GST_TYPE_BUS, GstBusClass))
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#define GST_IS_BUS_CLASS(bclass) (G_TYPE_CHECK_CLASS_TYPE ((bclass), GST_TYPE_BUS))
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#define GST_BUS_GET_CLASS(bus) (G_TYPE_INSTANCE_GET_CLASS ((bus), GST_TYPE_BUS, GstBusClass))
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#define GST_BUS_CAST(bus) ((GstBus*)(bus))
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typedef enum {
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GST_BUS_FLUSHING = GST_OBJECT_FLAG_LAST,
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GST_BUS_FLAG_LAST = GST_OBJECT_FLAG_LAST + 1
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} GstBusFlags;
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typedef enum
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{
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GST_BUS_DROP = 0, /* drop message */
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GST_BUS_PASS = 1, /* pass message to async queue */
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GST_BUS_ASYNC = 2, /* pass message to async queue, continue if message is handled */
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} GstBusSyncReply;
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/**
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* GstBusSyncHandler:
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* @bus: the #GstBus that sent the message
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* @message: the #GstMessage
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* @data: user data that has been given, when registering the handler
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*
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* Handler will be invoked synchronously, when a new message has been injected
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* into the bus.
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*
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* Returns: #GstBusSyncReply stating what to do with the message
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*/
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typedef GstBusSyncReply (*GstBusSyncHandler) (GstBus * bus, GstMessage * message, gpointer data);
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/**
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* GstBusHandler:
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* @bus: the #GstBus that sent the message
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* @message: the #GstMessage
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* @data: user data that has been given, when registering the handler
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*
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* Handler will be invoked asynchronously, after a new message has been injected
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* into the bus. Return %TRUE if the message has been handled. It will then be
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* taken from the bus and _unref()'ed.
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*
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* Returns: %TRUE if message should be taken from the bus
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*/
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typedef gboolean (*GstBusHandler) (GstBus * bus, GstMessage * message, gpointer data);
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struct _GstBus
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{
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GstObject object;
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/*< private > */
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GQueue *queue;
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GMutex *queue_lock;
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GstBusSyncHandler sync_handler;
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gpointer sync_handler_data;
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/*< private > */
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gpointer _gst_reserved[GST_PADDING];
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};
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struct _GstBusClass
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{
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GstObjectClass parent_class;
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/*< private > */
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gpointer _gst_reserved[GST_PADDING];
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};
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GType gst_bus_get_type (void);
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GstBus* gst_bus_new (void);
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gboolean gst_bus_post (GstBus * bus, GstMessage * message);
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gboolean gst_bus_have_pending (GstBus * bus);
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GstMessage * gst_bus_peek (GstBus * bus);
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GstMessage * gst_bus_pop (GstBus * bus);
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void gst_bus_set_flushing (GstBus * bus, gboolean flushing);
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void gst_bus_set_sync_handler (GstBus * bus, GstBusSyncHandler func,
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gpointer data);
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GSource * gst_bus_create_watch (GstBus * bus);
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guint gst_bus_add_watch_full (GstBus * bus,
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gint priority,
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GstBusHandler handler,
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gpointer user_data,
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GDestroyNotify notify);
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guint gst_bus_add_watch (GstBus * bus,
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GstBusHandler handler,
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gpointer user_data);
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GstMessageType gst_bus_poll (GstBus *bus, GstMessageType events,
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GstClockTimeDiff timeout);
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G_END_DECLS
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#endif /* __GST_BUS_H__ */
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