/* GStreamer * Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu> * 2000 Wim Taymans <wim.taymans@chello.be> * * gstevent.h: Header for GstEvent 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_EVENT_H__ #define __GST_EVENT_H__ #include <gst/gsttypes.h> #include <gst/gstelement.h> #include <gst/gstobject.h> #include <gst/gstdata.h> #include <gst/gstcaps.h> #ifdef __cplusplus extern "C" { #endif /* __cplusplus */ typedef enum { GST_EVENT_UNKNOWN, /* horizontal events */ GST_EVENT_EOS, GST_EVENT_FLUSH, GST_EVENT_EMPTY, GST_EVENT_SEEK, GST_EVENT_DISCONTINUOUS, /* vertical events */ GST_EVENT_INFO, GST_EVENT_ERROR, } GstEventType; extern GType _gst_event_type; #define GST_TYPE_EVENT (_gst_event_type) #define GST_EVENT(event) ((GstEvent*)(event)) #define GST_IS_EVENT(event) (GST_DATA_TYPE(event) == GST_TYPE_EVENT) #define GST_EVENT_TYPE(event) (GST_EVENT(event)->type) #define GST_EVENT_TIMESTAMP(event) (GST_EVENT(event)->timestamp) #define GST_EVENT_SRC(event) (GST_EVENT(event)->src) /* seek events */ typedef enum { GST_SEEK_ANY, GST_SEEK_TIMEOFFSET, GST_SEEK_BYTEOFFSET } GstSeekType; #define GST_EVENT_SEEK_TYPE(event) (GST_EVENT(event)->event_data.seek.type) #define GST_EVENT_SEEK_OFFSET(event) (GST_EVENT(event)->event_data.seek.offset) #define GST_EVENT_SEEK_FLUSH(event) (GST_EVENT(event)->event_data.seek.flush) #define GST_EVENT_INFO_PROPS(event) (GST_EVENT(event)->event_data.info.props) struct _GstEvent { GstData data; GstEventType type; guint64 timestamp; GstObject *src; union { struct { GstSeekType type; guint64 offset; gboolean flush; } seek; struct { GstProps *props; } info; struct { GstElementState old_state; GstElementState new_state; } state; } event_data; }; void _gst_event_initialize (void); GstEvent* gst_event_new (GstEventType type); void gst_event_free (GstEvent* event); /* seek events */ GstEvent* gst_event_new_seek (GstSeekType type, guint64 offset, gboolean flush); /* flush events */ #define gst_event_new_flush() gst_event_new(GST_EVENT_FLUSH) /* info events */ GstEvent* gst_event_new_info (const gchar *firstname, ...); #ifdef __cplusplus } #endif /* __cplusplus */ #endif /* __GST_EVENT_H__ */