mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-12-19 14:56:36 +00:00
56d3cdf64a
Original commit message from CVS: - Elements can now send events to their parent. - remove the g_signals from the core for parent<->child communication - the application can easily get element info by listening for an event signal from the toplevel bin. - added gst_element_info()/_error(). - fakesrc and fakesink use the info event instead of g_print. - GST_TYPE_* causes segfaults with elect fence, rever to G_TYPE_POINTER until we know what's wrong. - various leaks fixed wrt element destroy. - The object that created the event is now stored as GST_EVENT_SRC
122 lines
3.3 KiB
C
122 lines
3.3 KiB
C
/* GStreamer
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* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
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* 2000 Wim Taymans <wim.taymans@chello.be>
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*
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* gstevent.h: Header for GstEvent 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_EVENT_H__
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#define __GST_EVENT_H__
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#include <gst/gsttypes.h>
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#include <gst/gstelement.h>
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#include <gst/gstobject.h>
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#include <gst/gstdata.h>
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#include <gst/gstcaps.h>
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#ifdef __cplusplus
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extern "C" {
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#endif /* __cplusplus */
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typedef enum {
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GST_EVENT_UNKNOWN,
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/* horizontal events */
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GST_EVENT_EOS,
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GST_EVENT_FLUSH,
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GST_EVENT_EMPTY,
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GST_EVENT_SEEK,
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GST_EVENT_DISCONTINUOUS,
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/* vertical events */
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GST_EVENT_INFO,
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GST_EVENT_ERROR,
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GST_EVENT_STATE_CHANGE,
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} GstEventType;
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extern GType _gst_event_type;
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#define GST_TYPE_EVENT (_gst_event_type)
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#define GST_EVENT(event) ((GstEvent*)(event))
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#define GST_IS_EVENT(event) (GST_DATA_TYPE(event) == GST_TYPE_EVENT)
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#define GST_EVENT_TYPE(event) (GST_EVENT(event)->type)
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#define GST_EVENT_TIMESTAMP(event) (GST_EVENT(event)->timestamp)
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#define GST_EVENT_SRC(event) (GST_EVENT(event)->src)
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/* seek events */
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typedef enum {
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GST_SEEK_ANY,
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GST_SEEK_TIMEOFFSET,
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GST_SEEK_BYTEOFFSET
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} GstSeekType;
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#define GST_EVENT_SEEK_TYPE(event) (GST_EVENT(event)->event_data.seek.type)
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#define GST_EVENT_SEEK_OFFSET(event) (GST_EVENT(event)->event_data.seek.offset)
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#define GST_EVENT_SEEK_FLUSH(event) (GST_EVENT(event)->event_data.seek.flush)
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#define GST_EVENT_INFO_PROPS(event) (GST_EVENT(event)->event_data.info.props)
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#define GST_EVENT_STATE_OLD(event) (GST_EVENT(event)->event_data.state.old_state)
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#define GST_EVENT_STATE_NEW(event) (GST_EVENT(event)->event_data.state.new_state)
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struct _GstEvent {
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GstData data;
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GstEventType type;
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guint64 timestamp;
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GstObject *src;
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union {
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struct {
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GstSeekType type;
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guint64 offset;
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gboolean flush;
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} seek;
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struct {
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GstProps *props;
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} info;
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struct {
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GstElementState old_state;
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GstElementState new_state;
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} state;
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} event_data;
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};
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void _gst_event_initialize (void);
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GstEvent* gst_event_new (GstEventType type);
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void gst_event_free (GstEvent* event);
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/* seek events */
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GstEvent* gst_event_new_seek (GstSeekType type, guint64 offset, gboolean flush);
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/* flush events */
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#define gst_event_new_flush() gst_event_new(GST_EVENT_FLUSH)
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/* info events */
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GstEvent* gst_event_new_info (const gchar *firstname, ...);
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/* state change events */
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GstEvent* gst_event_new_state_change (GstElementState old, GstElementState state);
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#ifdef __cplusplus
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}
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#endif /* __cplusplus */
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#endif /* __GST_EVENT_H__ */
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