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., 51 Franklin St, Fifth Floor,
21 * Boston, MA 02110-1301, 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_SEGMENT: A new media segment follows in the dataflow. The
87 * segment events contains information for clipping buffers and
88 * converting buffer timestamps to running-time and
90 * @GST_EVENT_TAG: A new set of metadata tags has been found in the stream.
91 * @GST_EVENT_BUFFERSIZE: Notification of buffering requirements. Currently not
93 * @GST_EVENT_SINK_MESSAGE: An event that sinks turn into a message. Used to
94 * send messages that should be emitted in sync with
96 * @GST_EVENT_EOS: End-Of-Stream. No more data is to be expected to follow
97 * without a SEGMENT event.
98 * @GST_EVENT_SEGMENT_DONE: Marks the end of a segment playback.
99 * @GST_EVENT_GAP: Marks a gap in the datastream.
100 * @GST_EVENT_TOC: An event which indicates that a new table of contents (TOC)
101 * was found or updated.
102 * @GST_EVENT_CONTEXT: An event to communicate a #GstContext to other
103 * elements (Since 1.2)
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_SEGMENT = GST_EVENT_MAKE_TYPE (70, FLAG(DOWNSTREAM) | FLAG(SERIALIZED) | FLAG(STICKY)),
147 GST_EVENT_TAG = GST_EVENT_MAKE_TYPE (80, FLAG(DOWNSTREAM) | FLAG(SERIALIZED) | FLAG(STICKY) | FLAG(STICKY_MULTI)),
148 GST_EVENT_BUFFERSIZE = GST_EVENT_MAKE_TYPE (90, FLAG(DOWNSTREAM) | FLAG(SERIALIZED) | FLAG(STICKY)),
149 GST_EVENT_SINK_MESSAGE = GST_EVENT_MAKE_TYPE (100, FLAG(DOWNSTREAM) | FLAG(SERIALIZED) | FLAG(STICKY) | FLAG(STICKY_MULTI)),
150 GST_EVENT_EOS = GST_EVENT_MAKE_TYPE (110, FLAG(DOWNSTREAM) | FLAG(SERIALIZED) | FLAG(STICKY)),
151 GST_EVENT_TOC = GST_EVENT_MAKE_TYPE (120, FLAG(DOWNSTREAM) | FLAG(SERIALIZED) | FLAG(STICKY) | FLAG(STICKY_MULTI)),
152 GST_EVENT_CONTEXT = GST_EVENT_MAKE_TYPE (130, 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>
186 #include <gst/gstcontext.h>
190 GST_EXPORT GType _gst_event_type;
192 #define GST_TYPE_EVENT (_gst_event_type)
193 #define GST_IS_EVENT(obj) (GST_IS_MINI_OBJECT_TYPE (obj, GST_TYPE_EVENT))
194 #define GST_EVENT_CAST(obj) ((GstEvent *)(obj))
195 #define GST_EVENT(obj) (GST_EVENT_CAST(obj))
199 * @event: the event to query
201 * Get the #GstEventType of the event.
203 #define GST_EVENT_TYPE(event) (GST_EVENT_CAST(event)->type)
206 * GST_EVENT_TYPE_NAME:
207 * @event: the event to query
209 * Get a constant string representation of the #GstEventType of the event.
211 #define GST_EVENT_TYPE_NAME(event) (gst_event_type_get_name(GST_EVENT_TYPE(event)))
214 * GST_EVENT_TIMESTAMP:
215 * @event: the event to query
217 * Get the #GstClockTime timestamp of the event. This is the time when the event
220 #define GST_EVENT_TIMESTAMP(event) (GST_EVENT_CAST(event)->timestamp)
224 * @event: the event to query
226 * The sequence number of @event.
228 #define GST_EVENT_SEQNUM(event) (GST_EVENT_CAST(event)->seqnum)
231 * GST_EVENT_IS_UPSTREAM:
232 * @ev: the event to query
234 * Check if an event can travel upstream.
236 #define GST_EVENT_IS_UPSTREAM(ev) !!(GST_EVENT_TYPE (ev) & GST_EVENT_TYPE_UPSTREAM)
238 * GST_EVENT_IS_DOWNSTREAM:
239 * @ev: the event to query
241 * Check if an event can travel downstream.
243 #define GST_EVENT_IS_DOWNSTREAM(ev) !!(GST_EVENT_TYPE (ev) & GST_EVENT_TYPE_DOWNSTREAM)
245 * GST_EVENT_IS_SERIALIZED:
246 * @ev: the event to query
248 * Check if an event is serialized with the data stream.
250 #define GST_EVENT_IS_SERIALIZED(ev) !!(GST_EVENT_TYPE (ev) & GST_EVENT_TYPE_SERIALIZED)
252 * GST_EVENT_IS_STICKY:
253 * @ev: the event to query
255 * Check if an event is sticky on the pads.
257 #define GST_EVENT_IS_STICKY(ev) !!(GST_EVENT_TYPE (ev) & GST_EVENT_TYPE_STICKY)
260 * gst_event_is_writable:
263 * Tests if you can safely write data into a event's structure or validly
264 * modify the seqnum and timestamp field.
266 #define gst_event_is_writable(ev) gst_mini_object_is_writable (GST_MINI_OBJECT_CAST (ev))
268 * gst_event_make_writable:
269 * @ev: (transfer full): a #GstEvent
271 * Makes a writable event from the given event. If the source event is
272 * already writable, this will simply return the same event. A copy will
273 * otherwise be made using gst_event_copy().
275 * Returns: (transfer full): a writable event which may or may not be the
278 #define gst_event_make_writable(ev) GST_EVENT_CAST (gst_mini_object_make_writable (GST_MINI_OBJECT_CAST (ev)))
281 * @old_event: (inout) (transfer full): pointer to a pointer to a #GstEvent
283 * @new_event: (allow-none) (transfer none): pointer to a #GstEvent that will
284 * replace the event pointed to by @old_event.
286 * Modifies a pointer to a #GstEvent to point to a different #GstEvent. The
287 * modification is done atomically (so this is useful for ensuring thread safety
288 * in some cases), and the reference counts are updated appropriately (the old
289 * event is unreffed, the new one is reffed).
291 * Either @new_event or the #GstEvent pointed to by @old_event may be NULL.
293 * Returns: TRUE if @new_event was different from @old_event
295 #ifdef _FOOL_GTK_DOC_
296 G_INLINE_FUNC gboolean gst_event_replace (GstEvent **old_event, GstEvent *new_event);
299 static inline gboolean
300 gst_event_replace (GstEvent **old_event, GstEvent *new_event)
302 return gst_mini_object_replace ((GstMiniObject **) old_event, (GstMiniObject *) new_event);
307 * @old_event: (inout) (transfer full): pointer to a pointer to a #GstEvent
310 * Atomically replace the #GstEvent pointed to by @old_event with NULL and
311 * return the original event.
313 * Returns: the #GstEvent that was in @old_event
315 #ifdef _FOOL_GTK_DOC_
316 G_INLINE_FUNC GstEvent * gst_event_steal (GstEvent **old_event);
319 static inline GstEvent *
320 gst_event_steal (GstEvent **old_event)
322 return GST_EVENT_CAST (gst_mini_object_steal ((GstMiniObject **) old_event));
327 * @old_event: (inout) (transfer full): pointer to a pointer to a #GstEvent
329 * @new_event: (allow-none) (transfer full): pointer to a #GstEvent that will
330 * replace the event pointed to by @old_event.
332 * Modifies a pointer to a #GstEvent to point to a different #GstEvent. This
333 * function is similar to gst_event_replace() except that it takes ownership of
336 * Either @new_event or the #GstEvent pointed to by @old_event may be NULL.
338 * Returns: TRUE if @new_event was different from @old_event
340 #ifdef _FOOL_GTK_DOC_
341 G_INLINE_FUNC gboolean gst_event_take (GstEvent **old_event, GstEvent *new_event);
344 static inline gboolean
345 gst_event_take (GstEvent **old_event, GstEvent *new_event)
347 return gst_mini_object_take ((GstMiniObject **) old_event, (GstMiniObject *) new_event);
352 * @GST_QOS_TYPE_OVERFLOW: The QoS event type that is produced when downstream
353 * elements are producing data too quickly and the element can't keep up
354 * processing the data. Upstream should reduce their processing rate. This
355 * type is also used when buffers arrive early or in time.
356 * @GST_QOS_TYPE_UNDERFLOW: The QoS event type that is produced when downstream
357 * elements are producing data too slowly and need to speed up their processing
359 * @GST_QOS_TYPE_THROTTLE: The QoS event type that is produced when the
360 * application enabled throttling to limit the datarate.
362 * The different types of QoS events that can be given to the
363 * gst_event_new_qos() method.
366 GST_QOS_TYPE_OVERFLOW = 0,
367 GST_QOS_TYPE_UNDERFLOW = 1,
368 GST_QOS_TYPE_THROTTLE = 2
373 * @GST_STREAM_FLAG_NONE: This stream has no special attributes
374 * @GST_STREAM_FLAG_SPARSE: This stream is a sparse stream (e.g. a subtitle
375 * stream), data may flow only in irregular intervals with large gaps in
377 * @GST_STREAM_FLAG_SELECT: This stream should be selected by default. This
378 * flag may be used by demuxers to signal that a stream should be selected
379 * by default in a playback scenario.
380 * @GST_STREAM_FLAG_UNSELECT: This stream should not be selected by default.
381 * This flag may be used by demuxers to signal that a stream should not
382 * be selected by default in a playback scenario, but only if explicitly
383 * selected by the user (e.g. an audio track for the hard of hearing or
384 * a director's commentary track).
389 GST_STREAM_FLAG_NONE,
390 GST_STREAM_FLAG_SPARSE = (1 << 0),
391 GST_STREAM_FLAG_SELECT = (1 << 1),
392 GST_STREAM_FLAG_UNSELECT = (1 << 2)
397 * @mini_object: the parent structure
398 * @type: the #GstEventType of the event
399 * @timestamp: the timestamp of the event
400 * @seqnum: the sequence number of the event
405 GstMiniObject mini_object;
407 /*< public >*/ /* with COW */
413 const gchar* gst_event_type_get_name (GstEventType type);
414 GQuark gst_event_type_to_quark (GstEventType type);
416 gst_event_type_get_flags (GstEventType type);
422 * @event: The event to refcount
424 * Increase the refcount of this event.
426 * Returns: (transfer full): @event (for convenience when doing assignments)
428 #ifdef _FOOL_GTK_DOC_
429 G_INLINE_FUNC GstEvent * gst_event_ref (GstEvent * event);
432 static inline GstEvent *
433 gst_event_ref (GstEvent * event)
435 return (GstEvent *) gst_mini_object_ref (GST_MINI_OBJECT_CAST (event));
440 * @event: (transfer full): the event to refcount
442 * Decrease the refcount of an event, freeing it if the refcount reaches 0.
444 #ifdef _FOOL_GTK_DOC_
445 G_INLINE_FUNC void gst_event_unref (GstEvent * event);
449 gst_event_unref (GstEvent * event)
451 gst_mini_object_unref (GST_MINI_OBJECT_CAST (event));
457 * @event: The event to copy
459 * Copy the event using the event specific copy function.
461 * Returns: (transfer full): the new event
463 #ifdef _FOOL_GTK_DOC_
464 G_INLINE_FUNC GstEvent * gst_event_copy (const GstEvent * event);
467 static inline GstEvent *
468 gst_event_copy (const GstEvent * event)
470 return GST_EVENT_CAST (gst_mini_object_copy (GST_MINI_OBJECT_CONST_CAST (event)));
473 GType gst_event_get_type (void);
476 GstEvent* gst_event_new_custom (GstEventType type, GstStructure *structure) G_GNUC_MALLOC;
479 gst_event_get_structure (GstEvent *event);
480 GstStructure * gst_event_writable_structure (GstEvent *event);
482 gboolean gst_event_has_name (GstEvent *event, const gchar *name);
484 /* identifiers for events and messages */
485 guint32 gst_event_get_seqnum (GstEvent *event);
486 void gst_event_set_seqnum (GstEvent *event, guint32 seqnum);
488 /* Stream start event */
489 GstEvent * gst_event_new_stream_start (const gchar *stream_id) G_GNUC_MALLOC;
490 void gst_event_parse_stream_start (GstEvent *event, const gchar **stream_id);
492 void gst_event_set_stream_flags (GstEvent *event, GstStreamFlags flags);
493 void gst_event_parse_stream_flags (GstEvent *event, GstStreamFlags *flags);
496 GstEvent * gst_event_new_flush_start (void) G_GNUC_MALLOC;
498 GstEvent * gst_event_new_flush_stop (gboolean reset_time) G_GNUC_MALLOC;
499 void gst_event_parse_flush_stop (GstEvent *event, gboolean *reset_time);
502 GstEvent * gst_event_new_eos (void) G_GNUC_MALLOC;
505 GstEvent * gst_event_new_gap (GstClockTime timestamp,
506 GstClockTime duration) G_GNUC_MALLOC;
508 void gst_event_parse_gap (GstEvent * event,
509 GstClockTime * timestamp,
510 GstClockTime * duration);
513 GstEvent * gst_event_new_caps (GstCaps *caps) G_GNUC_MALLOC;
514 void gst_event_parse_caps (GstEvent *event, GstCaps **caps);
517 GstEvent* gst_event_new_segment (const GstSegment *segment) G_GNUC_MALLOC;
518 void gst_event_parse_segment (GstEvent *event, const GstSegment **segment);
519 void gst_event_copy_segment (GstEvent *event, GstSegment *segment);
522 GstEvent* gst_event_new_tag (GstTagList *taglist) G_GNUC_MALLOC;
523 void gst_event_parse_tag (GstEvent *event, GstTagList **taglist);
526 GstEvent* gst_event_new_toc (GstToc *toc, gboolean updated);
527 void gst_event_parse_toc (GstEvent *event, GstToc **toc, gboolean *updated);
531 GstEvent * gst_event_new_buffer_size (GstFormat format, gint64 minsize, gint64 maxsize,
532 gboolean async) G_GNUC_MALLOC;
533 void gst_event_parse_buffer_size (GstEvent *event, GstFormat *format, gint64 *minsize,
534 gint64 *maxsize, gboolean *async);
537 GstEvent* gst_event_new_sink_message (const gchar *name, GstMessage *msg) G_GNUC_MALLOC;
538 void gst_event_parse_sink_message (GstEvent *event, GstMessage **msg);
541 GstEvent* gst_event_new_qos (GstQOSType type, gdouble proportion,
542 GstClockTimeDiff diff, GstClockTime timestamp) G_GNUC_MALLOC;
543 void gst_event_parse_qos (GstEvent *event, GstQOSType *type,
544 gdouble *proportion, GstClockTimeDiff *diff,
545 GstClockTime *timestamp);
547 GstEvent* gst_event_new_seek (gdouble rate, GstFormat format, GstSeekFlags flags,
548 GstSeekType start_type, gint64 start,
549 GstSeekType stop_type, gint64 stop) G_GNUC_MALLOC;
550 void gst_event_parse_seek (GstEvent *event, gdouble *rate, GstFormat *format,
552 GstSeekType *start_type, gint64 *start,
553 GstSeekType *stop_type, gint64 *stop);
555 /* navigation event */
556 GstEvent* gst_event_new_navigation (GstStructure *structure) G_GNUC_MALLOC;
559 GstEvent* gst_event_new_latency (GstClockTime latency) G_GNUC_MALLOC;
560 void gst_event_parse_latency (GstEvent *event, GstClockTime *latency);
563 GstEvent* gst_event_new_step (GstFormat format, guint64 amount, gdouble rate,
564 gboolean flush, gboolean intermediate) G_GNUC_MALLOC;
565 void gst_event_parse_step (GstEvent *event, GstFormat *format, guint64 *amount,
566 gdouble *rate, gboolean *flush, gboolean *intermediate);
568 /* renegotiate event */
569 GstEvent* gst_event_new_reconfigure (void) G_GNUC_MALLOC;
571 /* TOC select event */
572 GstEvent* gst_event_new_toc_select (const gchar *uid) G_GNUC_MALLOC;
573 void gst_event_parse_toc_select (GstEvent *event, gchar **uid);
575 /* segment-done event */
576 GstEvent* gst_event_new_segment_done (GstFormat format, gint64 position) G_GNUC_MALLOC;
577 void gst_event_parse_segment_done (GstEvent *event, GstFormat *format, gint64 *position);
580 GstEvent* gst_event_new_context (GstContext * context) G_GNUC_MALLOC;
581 void gst_event_parse_context (GstEvent *event, GstContext **context);
585 #endif /* __GST_EVENT_H__ */