2 * Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
3 * 2000 Wim Taymans <wim.taymans@chello.be>
4 * 2005 Wim Taymans <wim@fluendo.com>
6 * gstevent.h: Header for GstEvent subsystem
8 * This library is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Library General Public
10 * License as published by the Free Software Foundation; either
11 * version 2 of the License, or (at your option) any later version.
13 * This library is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Library General Public License for more details.
18 * You should have received a copy of the GNU Library General Public
19 * License along with this library; if not, write to the
20 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
21 * Boston, MA 02111-1307, USA.
25 #ifndef __GST_EVENT_H__
26 #define __GST_EVENT_H__
28 typedef struct _GstEvent GstEvent;
32 * @GST_EVENT_TYPE_UPSTREAM: Set if the event can travel upstream.
33 * @GST_EVENT_TYPE_DOWNSTREAM: Set if the event can travel downstream.
34 * @GST_EVENT_TYPE_SERIALIZED: Set if the event should be serialized with data
36 * @GST_EVENT_TYPE_STICKY: Set if the event is sticky on the pads.
37 * @GST_EVENT_TYPE_STICKY_MULTI: Multiple sticky events can be on a pad, each
38 * identified by the event name.
40 * #GstEventTypeFlags indicate the aspects of the different #GstEventType
41 * values. You can get the type flags of a #GstEventType with the
42 * gst_event_type_get_flags() function.
45 GST_EVENT_TYPE_UPSTREAM = 1 << 0,
46 GST_EVENT_TYPE_DOWNSTREAM = 1 << 1,
47 GST_EVENT_TYPE_SERIALIZED = 1 << 2,
48 GST_EVENT_TYPE_STICKY = 1 << 3,
49 GST_EVENT_TYPE_STICKY_MULTI = 1 << 4
53 * GST_EVENT_TYPE_BOTH:
55 * The same thing as #GST_EVENT_TYPE_UPSTREAM | #GST_EVENT_TYPE_DOWNSTREAM.
57 #define GST_EVENT_TYPE_BOTH \
58 (GST_EVENT_TYPE_UPSTREAM | GST_EVENT_TYPE_DOWNSTREAM)
60 #define GST_EVENT_NUM_SHIFT (8)
63 * GST_EVENT_MAKE_TYPE:
64 * @num: the event number to create
65 * @flags: the event flags
67 * when making custom event types, use this macro with the num and
70 #define GST_EVENT_MAKE_TYPE(num,flags) \
71 (((num) << GST_EVENT_NUM_SHIFT) | (flags))
73 #define FLAG(name) GST_EVENT_TYPE_##name
77 * @GST_EVENT_UNKNOWN: unknown event.
78 * @GST_EVENT_FLUSH_START: Start a flush operation. This event clears all data
79 * from the pipeline and unblock all streaming threads.
80 * @GST_EVENT_FLUSH_STOP: Stop a flush operation. This event resets the
81 * running-time of the pipeline.
82 * @GST_EVENT_STREAM_START: Event to mark the start of a new stream. Sent before any
83 * other serialized event and only sent at the start of a new stream,
84 * not after flushing seeks.
85 * @GST_EVENT_CAPS: #GstCaps event. Notify the pad of a new media type.
86 * @GST_EVENT_STREAM_CONFIG: (unimplemented) contains configuration information for the stream,
87 * for example stream-headers and codec-data.
88 * @GST_EVENT_SEGMENT: A new media segment follows in the dataflow. The
89 * segment events contains information for clipping buffers and
90 * converting buffer timestamps to running-time and
92 * @GST_EVENT_TAG: A new set of metadata tags has been found in the stream.
93 * @GST_EVENT_BUFFERSIZE: Notification of buffering requirements. Currently not
95 * @GST_EVENT_SINK_MESSAGE: An event that sinks turn into a message. Used to
96 * send messages that should be emitted in sync with
98 * @GST_EVENT_EOS: End-Of-Stream. No more data is to be expected to follow
99 * without a SEGMENT event.
100 * @GST_EVENT_SEGMENT_DONE: Marks the end of a segment playback.
101 * @GST_EVENT_GAP: Marks a gap in the datastream.
102 * @GST_EVENT_TOC: An event which indicates that a new table of contents (TOC)
103 * was found or updated.
104 * @GST_EVENT_QOS: A quality message. Used to indicate to upstream elements
105 * that the downstream elements should adjust their processing
107 * @GST_EVENT_SEEK: A request for a new playback position and rate.
108 * @GST_EVENT_NAVIGATION: Navigation events are usually used for communicating
109 * user requests, such as mouse or keyboard movements,
110 * to upstream elements.
111 * @GST_EVENT_LATENCY: Notification of new latency adjustment. Sinks will use
112 * the latency information to adjust their synchronisation.
113 * @GST_EVENT_STEP: A request for stepping through the media. Sinks will usually
114 * execute the step operation.
115 * @GST_EVENT_RECONFIGURE: A request for upstream renegotiating caps and reconfiguring.
116 * @GST_EVENT_TOC_SELECT: A request for a new playback position based on TOC
118 * @GST_EVENT_CUSTOM_UPSTREAM: Upstream custom event
119 * @GST_EVENT_CUSTOM_DOWNSTREAM: Downstream custom event that travels in the
121 * @GST_EVENT_CUSTOM_DOWNSTREAM_OOB: Custom out-of-band downstream event.
122 * @GST_EVENT_CUSTOM_DOWNSTREAM_STICKY: Custom sticky downstream event.
123 * @GST_EVENT_CUSTOM_BOTH: Custom upstream or downstream event.
124 * In-band when travelling downstream.
125 * @GST_EVENT_CUSTOM_BOTH_OOB: Custom upstream or downstream out-of-band event.
127 * #GstEventType lists the standard event types that can be sent in a pipeline.
129 * The custom event types can be used for private messages between elements
130 * that can't be expressed using normal
131 * GStreamer buffer passing semantics. Custom events carry an arbitrary
133 * Specific custom events are distinguished by the name of the structure.
135 /* NOTE: keep in sync with quark registration in gstevent.c */
137 GST_EVENT_UNKNOWN = GST_EVENT_MAKE_TYPE (0, 0),
139 /* bidirectional events */
140 GST_EVENT_FLUSH_START = GST_EVENT_MAKE_TYPE (10, FLAG(BOTH)),
141 GST_EVENT_FLUSH_STOP = GST_EVENT_MAKE_TYPE (20, FLAG(BOTH) | FLAG(SERIALIZED)),
143 /* downstream serialized events */
144 GST_EVENT_STREAM_START = GST_EVENT_MAKE_TYPE (40, FLAG(DOWNSTREAM) | FLAG(SERIALIZED) | FLAG(STICKY)),
145 GST_EVENT_CAPS = GST_EVENT_MAKE_TYPE (50, FLAG(DOWNSTREAM) | FLAG(SERIALIZED) | FLAG(STICKY)),
146 GST_EVENT_STREAM_CONFIG = GST_EVENT_MAKE_TYPE (60, FLAG(DOWNSTREAM) | FLAG(SERIALIZED) | FLAG(STICKY)),
147 GST_EVENT_SEGMENT = GST_EVENT_MAKE_TYPE (70, FLAG(DOWNSTREAM) | FLAG(SERIALIZED) | FLAG(STICKY)),
148 GST_EVENT_TAG = GST_EVENT_MAKE_TYPE (80, FLAG(DOWNSTREAM) | FLAG(SERIALIZED) | FLAG(STICKY) | FLAG(STICKY_MULTI)),
149 GST_EVENT_BUFFERSIZE = GST_EVENT_MAKE_TYPE (90, FLAG(DOWNSTREAM) | FLAG(SERIALIZED) | FLAG(STICKY)),
150 GST_EVENT_SINK_MESSAGE = GST_EVENT_MAKE_TYPE (100, FLAG(DOWNSTREAM) | FLAG(SERIALIZED) | FLAG(STICKY) | FLAG(STICKY_MULTI)),
151 GST_EVENT_EOS = GST_EVENT_MAKE_TYPE (110, FLAG(DOWNSTREAM) | FLAG(SERIALIZED) | FLAG(STICKY)),
152 GST_EVENT_TOC = GST_EVENT_MAKE_TYPE (120, FLAG(DOWNSTREAM) | FLAG(SERIALIZED) | FLAG(STICKY) | FLAG(STICKY_MULTI)),
154 /* non-sticky downstream serialized */
155 GST_EVENT_SEGMENT_DONE = GST_EVENT_MAKE_TYPE (150, FLAG(DOWNSTREAM) | FLAG(SERIALIZED)),
156 GST_EVENT_GAP = GST_EVENT_MAKE_TYPE (160, FLAG(DOWNSTREAM) | FLAG(SERIALIZED)),
158 /* upstream events */
159 GST_EVENT_QOS = GST_EVENT_MAKE_TYPE (190, FLAG(UPSTREAM)),
160 GST_EVENT_SEEK = GST_EVENT_MAKE_TYPE (200, FLAG(UPSTREAM)),
161 GST_EVENT_NAVIGATION = GST_EVENT_MAKE_TYPE (210, FLAG(UPSTREAM)),
162 GST_EVENT_LATENCY = GST_EVENT_MAKE_TYPE (220, FLAG(UPSTREAM)),
163 GST_EVENT_STEP = GST_EVENT_MAKE_TYPE (230, FLAG(UPSTREAM)),
164 GST_EVENT_RECONFIGURE = GST_EVENT_MAKE_TYPE (240, FLAG(UPSTREAM)),
165 GST_EVENT_TOC_SELECT = GST_EVENT_MAKE_TYPE (250, FLAG(UPSTREAM)),
167 /* custom events start here */
168 GST_EVENT_CUSTOM_UPSTREAM = GST_EVENT_MAKE_TYPE (270, FLAG(UPSTREAM)),
169 GST_EVENT_CUSTOM_DOWNSTREAM = GST_EVENT_MAKE_TYPE (280, FLAG(DOWNSTREAM) | FLAG(SERIALIZED)),
170 GST_EVENT_CUSTOM_DOWNSTREAM_OOB = GST_EVENT_MAKE_TYPE (290, FLAG(DOWNSTREAM)),
171 GST_EVENT_CUSTOM_DOWNSTREAM_STICKY = GST_EVENT_MAKE_TYPE (300, FLAG(DOWNSTREAM) | FLAG(SERIALIZED) | FLAG(STICKY) | FLAG(STICKY_MULTI)),
172 GST_EVENT_CUSTOM_BOTH = GST_EVENT_MAKE_TYPE (310, FLAG(BOTH) | FLAG(SERIALIZED)),
173 GST_EVENT_CUSTOM_BOTH_OOB = GST_EVENT_MAKE_TYPE (320, FLAG(BOTH))
177 #include <gst/gstminiobject.h>
178 #include <gst/gstformat.h>
179 #include <gst/gstobject.h>
180 #include <gst/gstclock.h>
181 #include <gst/gststructure.h>
182 #include <gst/gsttaglist.h>
183 #include <gst/gstsegment.h>
184 #include <gst/gstsegment.h>
185 #include <gst/gstmessage.h>
189 GST_EXPORT GType _gst_event_type;
191 #define GST_TYPE_EVENT (_gst_event_type)
192 #define GST_IS_EVENT(obj) (GST_IS_MINI_OBJECT_TYPE (obj, GST_TYPE_EVENT))
193 #define GST_EVENT_CAST(obj) ((GstEvent *)(obj))
194 #define GST_EVENT(obj) (GST_EVENT_CAST(obj))
198 * @event: the event to query
200 * Get the #GstEventType of the event.
202 #define GST_EVENT_TYPE(event) (GST_EVENT_CAST(event)->type)
205 * GST_EVENT_TYPE_NAME:
206 * @event: the event to query
208 * Get a constant string representation of the #GstEventType of the event.
210 #define GST_EVENT_TYPE_NAME(event) (gst_event_type_get_name(GST_EVENT_TYPE(event)))
213 * GST_EVENT_TIMESTAMP:
214 * @event: the event to query
216 * Get the #GstClockTime timestamp of the event. This is the time when the event
219 #define GST_EVENT_TIMESTAMP(event) (GST_EVENT_CAST(event)->timestamp)
223 * @event: the event to query
225 * The sequence number of @event.
227 #define GST_EVENT_SEQNUM(event) (GST_EVENT_CAST(event)->seqnum)
230 * GST_EVENT_IS_UPSTREAM:
231 * @ev: the event to query
233 * Check if an event can travel upstream.
235 #define GST_EVENT_IS_UPSTREAM(ev) !!(GST_EVENT_TYPE (ev) & GST_EVENT_TYPE_UPSTREAM)
237 * GST_EVENT_IS_DOWNSTREAM:
238 * @ev: the event to query
240 * Check if an event can travel downstream.
242 #define GST_EVENT_IS_DOWNSTREAM(ev) !!(GST_EVENT_TYPE (ev) & GST_EVENT_TYPE_DOWNSTREAM)
244 * GST_EVENT_IS_SERIALIZED:
245 * @ev: the event to query
247 * Check if an event is serialized with the data stream.
249 #define GST_EVENT_IS_SERIALIZED(ev) !!(GST_EVENT_TYPE (ev) & GST_EVENT_TYPE_SERIALIZED)
251 * GST_EVENT_IS_STICKY:
252 * @ev: the event to query
254 * Check if an event is sticky on the pads.
256 #define GST_EVENT_IS_STICKY(ev) !!(GST_EVENT_TYPE (ev) & GST_EVENT_TYPE_STICKY)
259 * gst_event_is_writable:
262 * Tests if you can safely write data into a event's structure or validly
263 * modify the seqnum and timestamp field.
265 #define gst_event_is_writable(ev) gst_mini_object_is_writable (GST_MINI_OBJECT_CAST (ev))
267 * gst_event_make_writable:
268 * @ev: (transfer full): a #GstEvent
270 * Makes a writable event from the given event. If the source event is
271 * already writable, this will simply return the same event. A copy will
272 * otherwise be made using gst_event_copy().
274 * Returns: (transfer full): a writable event which may or may not be the
277 #define gst_event_make_writable(ev) GST_EVENT_CAST (gst_mini_object_make_writable (GST_MINI_OBJECT_CAST (ev)))
280 * @old_event: (inout) (transfer full): pointer to a pointer to a #GstEvent
282 * @new_event: (allow-none) (transfer none): pointer to a #GstEvent that will
283 * replace the event pointed to by @old_event.
285 * Modifies a pointer to a #GstEvent to point to a different #GstEvent. The
286 * modification is done atomically (so this is useful for ensuring thread safety
287 * in some cases), and the reference counts are updated appropriately (the old
288 * event is unreffed, the new one is reffed).
290 * Either @new_event or the #GstEvent pointed to by @old_event may be NULL.
292 * Returns: TRUE if @new_event was different from @old_event
294 #ifdef _FOOL_GTK_DOC_
295 G_INLINE_FUNC gboolean gst_event_replace (GstEvent **old_event, GstEvent *new_event);
298 static inline gboolean
299 gst_event_replace (GstEvent **old_event, GstEvent *new_event)
301 return gst_mini_object_replace ((GstMiniObject **) old_event, (GstMiniObject *) new_event);
306 * @old_event: (inout) (transfer full): pointer to a pointer to a #GstEvent
309 * Atomically replace the #GstEvent pointed to by @old_event with NULL and
310 * return the original event.
312 * Returns: the #GstEvent that was in @old_event
314 #ifdef _FOOL_GTK_DOC_
315 G_INLINE_FUNC GstEvent * gst_event_steal (GstEvent **old_event);
318 static inline GstEvent *
319 gst_event_steal (GstEvent **old_event)
321 return GST_EVENT_CAST (gst_mini_object_steal ((GstMiniObject **) old_event));
326 * @old_event: (inout) (transfer full): pointer to a pointer to a #GstEvent
328 * @new_event: (allow-none) (transfer full): pointer to a #GstEvent that will
329 * replace the event pointed to by @old_event.
331 * Modifies a pointer to a #GstEvent to point to a different #GstEvent. This
332 * function is similar to gst_event_replace() except that it takes ownership of
335 * Either @new_event or the #GstEvent pointed to by @old_event may be NULL.
337 * Returns: TRUE if @new_event was different from @old_event
339 #ifdef _FOOL_GTK_DOC_
340 G_INLINE_FUNC gboolean gst_event_take (GstEvent **old_event, GstEvent *new_event);
343 static inline gboolean
344 gst_event_take (GstEvent **old_event, GstEvent *new_event)
346 return gst_mini_object_take ((GstMiniObject **) old_event, (GstMiniObject *) new_event);
351 * @GST_QOS_TYPE_OVERFLOW: The QoS event type that is produced when downstream
352 * elements are producing data too quickly and the element can't keep up
353 * processing the data. Upstream should reduce their processing rate. This
354 * type is also used when buffers arrive early or in time.
355 * @GST_QOS_TYPE_UNDERFLOW: The QoS event type that is produced when downstream
356 * elements are producing data too slowly and need to speed up their processing
358 * @GST_QOS_TYPE_THROTTLE: The QoS event type that is produced when the
359 * application enabled throttling to limit the datarate.
361 * The different types of QoS events that can be given to the
362 * gst_event_new_qos() method.
365 GST_QOS_TYPE_OVERFLOW = 0,
366 GST_QOS_TYPE_UNDERFLOW = 1,
367 GST_QOS_TYPE_THROTTLE = 2
371 * GstStreamConfigFlags:
372 * @GST_STREAM_CONFIG_FLAG_NONE: no flags set
374 * GstStreamConfigFlags are flags passed with the stream config event, see
375 * gst_event_new_stream_config().
378 GST_STREAM_CONFIG_FLAG_NONE = 0
379 } GstStreamConfigFlags;
383 * @mini_object: the parent structure
384 * @type: the #GstEventType of the event
385 * @timestamp: the timestamp of the event
386 * @seqnum: the sequence number of the event
391 GstMiniObject mini_object;
393 /*< public >*/ /* with COW */
399 const gchar* gst_event_type_get_name (GstEventType type);
400 GQuark gst_event_type_to_quark (GstEventType type);
402 gst_event_type_get_flags (GstEventType type);
408 * @event: The event to refcount
410 * Increase the refcount of this event.
412 * Returns: (transfer full): @event (for convenience when doing assignments)
414 #ifdef _FOOL_GTK_DOC_
415 G_INLINE_FUNC GstEvent * gst_event_ref (GstEvent * event);
418 static inline GstEvent *
419 gst_event_ref (GstEvent * event)
421 return (GstEvent *) gst_mini_object_ref (GST_MINI_OBJECT_CAST (event));
426 * @event: (transfer full): the event to refcount
428 * Decrease the refcount of an event, freeing it if the refcount reaches 0.
430 #ifdef _FOOL_GTK_DOC_
431 G_INLINE_FUNC void gst_event_unref (GstEvent * event);
435 gst_event_unref (GstEvent * event)
437 gst_mini_object_unref (GST_MINI_OBJECT_CAST (event));
443 * @event: The event to copy
445 * Copy the event using the event specific copy function.
447 * Returns: (transfer full): the new event
449 #ifdef _FOOL_GTK_DOC_
450 G_INLINE_FUNC GstEvent * gst_event_copy (const GstEvent * event);
453 static inline GstEvent *
454 gst_event_copy (const GstEvent * event)
456 return GST_EVENT_CAST (gst_mini_object_copy (GST_MINI_OBJECT_CONST_CAST (event)));
459 GType gst_event_get_type (void);
462 GstEvent* gst_event_new_custom (GstEventType type, GstStructure *structure) G_GNUC_MALLOC;
465 gst_event_get_structure (GstEvent *event);
466 GstStructure * gst_event_writable_structure (GstEvent *event);
468 gboolean gst_event_has_name (GstEvent *event, const gchar *name);
470 /* identifiers for events and messages */
471 guint32 gst_event_get_seqnum (GstEvent *event);
472 void gst_event_set_seqnum (GstEvent *event, guint32 seqnum);
474 /* Stream start event */
475 GstEvent * gst_event_new_stream_start (void) G_GNUC_MALLOC;
478 GstEvent * gst_event_new_flush_start (void) G_GNUC_MALLOC;
480 GstEvent * gst_event_new_flush_stop (gboolean reset_time) G_GNUC_MALLOC;
481 void gst_event_parse_flush_stop (GstEvent *event, gboolean *reset_time);
484 GstEvent * gst_event_new_eos (void) G_GNUC_MALLOC;
487 GstEvent * gst_event_new_gap (GstClockTime timestamp,
488 GstClockTime duration) G_GNUC_MALLOC;
490 void gst_event_parse_gap (GstEvent * event,
491 GstClockTime * timestamp,
492 GstClockTime * duration);
495 GstEvent * gst_event_new_caps (GstCaps *caps) G_GNUC_MALLOC;
496 void gst_event_parse_caps (GstEvent *event, GstCaps **caps);
499 GstEvent * gst_event_new_stream_config (GstStreamConfigFlags flags) G_GNUC_MALLOC;
501 void gst_event_parse_stream_config (GstEvent * event, GstStreamConfigFlags * flags);
504 void gst_event_set_stream_config_setup_data (GstEvent * event, GstBuffer * buf);
506 gboolean gst_event_parse_stream_config_setup_data (GstEvent * event, GstBuffer ** buf);
509 void gst_event_add_stream_config_header (GstEvent * event, GstBuffer * buf);
511 guint gst_event_get_n_stream_config_headers (GstEvent * event);
513 gboolean gst_event_parse_nth_stream_config_header (GstEvent * event, guint index, GstBuffer ** buf);
516 GstEvent* gst_event_new_segment (const GstSegment *segment) G_GNUC_MALLOC;
517 void gst_event_parse_segment (GstEvent *event, const GstSegment **segment);
518 void gst_event_copy_segment (GstEvent *event, GstSegment *segment);
521 GstEvent* gst_event_new_tag (GstTagList *taglist) G_GNUC_MALLOC;
522 void gst_event_parse_tag (GstEvent *event, GstTagList **taglist);
525 GstEvent* gst_event_new_toc (GstToc *toc, gboolean updated);
526 void gst_event_parse_toc (GstEvent *event, GstToc **toc, gboolean *updated);
530 GstEvent * gst_event_new_buffer_size (GstFormat format, gint64 minsize, gint64 maxsize,
531 gboolean async) G_GNUC_MALLOC;
532 void gst_event_parse_buffer_size (GstEvent *event, GstFormat *format, gint64 *minsize,
533 gint64 *maxsize, gboolean *async);
536 GstEvent* gst_event_new_sink_message (const gchar *name, GstMessage *msg) G_GNUC_MALLOC;
537 void gst_event_parse_sink_message (GstEvent *event, GstMessage **msg);
540 GstEvent* gst_event_new_qos (GstQOSType type, gdouble proportion,
541 GstClockTimeDiff diff, GstClockTime timestamp) G_GNUC_MALLOC;
542 void gst_event_parse_qos (GstEvent *event, GstQOSType *type,
543 gdouble *proportion, GstClockTimeDiff *diff,
544 GstClockTime *timestamp);
546 GstEvent* gst_event_new_seek (gdouble rate, GstFormat format, GstSeekFlags flags,
547 GstSeekType start_type, gint64 start,
548 GstSeekType stop_type, gint64 stop) G_GNUC_MALLOC;
549 void gst_event_parse_seek (GstEvent *event, gdouble *rate, GstFormat *format,
551 GstSeekType *start_type, gint64 *start,
552 GstSeekType *stop_type, gint64 *stop);
554 /* navigation event */
555 GstEvent* gst_event_new_navigation (GstStructure *structure) G_GNUC_MALLOC;
558 GstEvent* gst_event_new_latency (GstClockTime latency) G_GNUC_MALLOC;
559 void gst_event_parse_latency (GstEvent *event, GstClockTime *latency);
562 GstEvent* gst_event_new_step (GstFormat format, guint64 amount, gdouble rate,
563 gboolean flush, gboolean intermediate) G_GNUC_MALLOC;
564 void gst_event_parse_step (GstEvent *event, GstFormat *format, guint64 *amount,
565 gdouble *rate, gboolean *flush, gboolean *intermediate);
567 /* renegotiate event */
568 GstEvent* gst_event_new_reconfigure (void) G_GNUC_MALLOC;
570 /* TOC select event */
571 GstEvent* gst_event_new_toc_select (const gchar *uid) G_GNUC_MALLOC;
572 void gst_event_parse_toc_select (GstEvent *event, gchar **uid);
574 /* segment-done event */
575 GstEvent* gst_event_new_segment_done (GstFormat format, gint64 position) G_GNUC_MALLOC;
576 void gst_event_parse_segment_done (GstEvent *event, GstFormat *format, gint64 *position);
580 #endif /* __GST_EVENT_H__ */