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_SELECT_STREAMS: A request to select one or more streams (Since 1.10)
83 * @GST_EVENT_STREAM_START: Event to mark the start of a new stream. Sent before any
84 * other serialized event and only sent at the start of a new stream,
85 * not after flushing seeks.
86 * @GST_EVENT_CAPS: #GstCaps event. Notify the pad of a new media type.
87 * @GST_EVENT_SEGMENT: A new media segment follows in the dataflow. The
88 * segment events contains information for clipping buffers and
89 * converting buffer timestamps to running-time and
91 * @GST_EVENT_STREAM_COLLECTION: A new #GstStreamCollection is available (Since 1.10)
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 either a STREAM_START event, or a FLUSH_STOP and a SEGMENT
101 * @GST_EVENT_SEGMENT_DONE: Marks the end of a segment playback.
102 * @GST_EVENT_GAP: Marks a gap in the datastream.
103 * @GST_EVENT_TOC: An event which indicates that a new table of contents (TOC)
104 * was found or updated.
105 * @GST_EVENT_PROTECTION: An event which indicates that new or updated
106 * encryption information has been found in the stream.
107 * @GST_EVENT_QOS: A quality message. Used to indicate to upstream elements
108 * that the downstream elements should adjust their processing
110 * @GST_EVENT_SEEK: A request for a new playback position and rate.
111 * @GST_EVENT_NAVIGATION: Navigation events are usually used for communicating
112 * user requests, such as mouse or keyboard movements,
113 * to upstream elements.
114 * @GST_EVENT_LATENCY: Notification of new latency adjustment. Sinks will use
115 * the latency information to adjust their synchronisation.
116 * @GST_EVENT_STEP: A request for stepping through the media. Sinks will usually
117 * execute the step operation.
118 * @GST_EVENT_RECONFIGURE: A request for upstream renegotiating caps and reconfiguring.
119 * @GST_EVENT_TOC_SELECT: A request for a new playback position based on TOC
121 * @GST_EVENT_CUSTOM_UPSTREAM: Upstream custom event
122 * @GST_EVENT_CUSTOM_DOWNSTREAM: Downstream custom event that travels in the
124 * @GST_EVENT_CUSTOM_DOWNSTREAM_OOB: Custom out-of-band downstream event.
125 * @GST_EVENT_CUSTOM_DOWNSTREAM_STICKY: Custom sticky downstream event.
126 * @GST_EVENT_CUSTOM_BOTH: Custom upstream or downstream event.
127 * In-band when travelling downstream.
128 * @GST_EVENT_CUSTOM_BOTH_OOB: Custom upstream or downstream out-of-band event.
130 * #GstEventType lists the standard event types that can be sent in a pipeline.
132 * The custom event types can be used for private messages between elements
133 * that can't be expressed using normal
134 * GStreamer buffer passing semantics. Custom events carry an arbitrary
136 * Specific custom events are distinguished by the name of the structure.
138 /* NOTE: keep in sync with quark registration in gstevent.c */
140 GST_EVENT_UNKNOWN = GST_EVENT_MAKE_TYPE (0, 0),
142 /* bidirectional events */
143 GST_EVENT_FLUSH_START = GST_EVENT_MAKE_TYPE (10, FLAG(BOTH)),
144 GST_EVENT_FLUSH_STOP = GST_EVENT_MAKE_TYPE (20, FLAG(BOTH) | FLAG(SERIALIZED)),
146 /* downstream serialized events */
147 GST_EVENT_STREAM_START = GST_EVENT_MAKE_TYPE (40, FLAG(DOWNSTREAM) | FLAG(SERIALIZED) | FLAG(STICKY)),
148 GST_EVENT_CAPS = GST_EVENT_MAKE_TYPE (50, FLAG(DOWNSTREAM) | FLAG(SERIALIZED) | FLAG(STICKY)),
149 GST_EVENT_SEGMENT = GST_EVENT_MAKE_TYPE (70, FLAG(DOWNSTREAM) | FLAG(SERIALIZED) | FLAG(STICKY)),
150 GST_EVENT_STREAM_COLLECTION = GST_EVENT_MAKE_TYPE (75, FLAG(DOWNSTREAM) | FLAG(SERIALIZED) | FLAG(STICKY) | FLAG(STICKY_MULTI)),
151 GST_EVENT_TAG = GST_EVENT_MAKE_TYPE (80, FLAG(DOWNSTREAM) | FLAG(SERIALIZED) | FLAG(STICKY) | FLAG(STICKY_MULTI)),
152 GST_EVENT_BUFFERSIZE = GST_EVENT_MAKE_TYPE (90, FLAG(DOWNSTREAM) | FLAG(SERIALIZED) | FLAG(STICKY)),
153 GST_EVENT_SINK_MESSAGE = GST_EVENT_MAKE_TYPE (100, FLAG(DOWNSTREAM) | FLAG(SERIALIZED) | FLAG(STICKY) | FLAG(STICKY_MULTI)),
154 GST_EVENT_EOS = GST_EVENT_MAKE_TYPE (110, FLAG(DOWNSTREAM) | FLAG(SERIALIZED) | FLAG(STICKY)),
155 GST_EVENT_TOC = GST_EVENT_MAKE_TYPE (120, FLAG(DOWNSTREAM) | FLAG(SERIALIZED) | FLAG(STICKY) | FLAG(STICKY_MULTI)),
156 GST_EVENT_PROTECTION = GST_EVENT_MAKE_TYPE (130, FLAG (DOWNSTREAM) | FLAG (SERIALIZED) | FLAG (STICKY) | FLAG (STICKY_MULTI)),
158 /* non-sticky downstream serialized */
159 GST_EVENT_SEGMENT_DONE = GST_EVENT_MAKE_TYPE (150, FLAG(DOWNSTREAM) | FLAG(SERIALIZED)),
160 GST_EVENT_GAP = GST_EVENT_MAKE_TYPE (160, FLAG(DOWNSTREAM) | FLAG(SERIALIZED)),
162 /* upstream events */
163 GST_EVENT_QOS = GST_EVENT_MAKE_TYPE (190, FLAG(UPSTREAM)),
164 GST_EVENT_SEEK = GST_EVENT_MAKE_TYPE (200, FLAG(UPSTREAM)),
165 GST_EVENT_NAVIGATION = GST_EVENT_MAKE_TYPE (210, FLAG(UPSTREAM)),
166 GST_EVENT_LATENCY = GST_EVENT_MAKE_TYPE (220, FLAG(UPSTREAM)),
167 GST_EVENT_STEP = GST_EVENT_MAKE_TYPE (230, FLAG(UPSTREAM)),
168 GST_EVENT_RECONFIGURE = GST_EVENT_MAKE_TYPE (240, FLAG(UPSTREAM)),
169 GST_EVENT_TOC_SELECT = GST_EVENT_MAKE_TYPE (250, FLAG(UPSTREAM)),
170 GST_EVENT_SELECT_STREAMS = GST_EVENT_MAKE_TYPE (260, FLAG(UPSTREAM)),
172 /* custom events start here */
173 GST_EVENT_CUSTOM_UPSTREAM = GST_EVENT_MAKE_TYPE (270, FLAG(UPSTREAM)),
174 GST_EVENT_CUSTOM_DOWNSTREAM = GST_EVENT_MAKE_TYPE (280, FLAG(DOWNSTREAM) | FLAG(SERIALIZED)),
175 GST_EVENT_CUSTOM_DOWNSTREAM_OOB = GST_EVENT_MAKE_TYPE (290, FLAG(DOWNSTREAM)),
176 GST_EVENT_CUSTOM_DOWNSTREAM_STICKY = GST_EVENT_MAKE_TYPE (300, FLAG(DOWNSTREAM) | FLAG(SERIALIZED) | FLAG(STICKY) | FLAG(STICKY_MULTI)),
177 GST_EVENT_CUSTOM_BOTH = GST_EVENT_MAKE_TYPE (310, FLAG(BOTH) | FLAG(SERIALIZED)),
178 GST_EVENT_CUSTOM_BOTH_OOB = GST_EVENT_MAKE_TYPE (320, FLAG(BOTH))
184 * @GST_STREAM_FLAG_NONE: This stream has no special attributes
185 * @GST_STREAM_FLAG_SPARSE: This stream is a sparse stream (e.g. a subtitle
186 * stream), data may flow only in irregular intervals with large gaps in
188 * @GST_STREAM_FLAG_SELECT: This stream should be selected by default. This
189 * flag may be used by demuxers to signal that a stream should be selected
190 * by default in a playback scenario.
191 * @GST_STREAM_FLAG_UNSELECT: This stream should not be selected by default.
192 * This flag may be used by demuxers to signal that a stream should not
193 * be selected by default in a playback scenario, but only if explicitly
194 * selected by the user (e.g. an audio track for the hard of hearing or
195 * a director's commentary track).
200 GST_STREAM_FLAG_NONE,
201 GST_STREAM_FLAG_SPARSE = (1 << 0),
202 GST_STREAM_FLAG_SELECT = (1 << 1),
203 GST_STREAM_FLAG_UNSELECT = (1 << 2)
206 #include <gst/gstminiobject.h>
207 #include <gst/gstformat.h>
208 #include <gst/gstobject.h>
209 #include <gst/gstclock.h>
210 #include <gst/gststructure.h>
211 #include <gst/gsttaglist.h>
212 #include <gst/gstsegment.h>
213 #include <gst/gstmessage.h>
214 #include <gst/gstcontext.h>
218 GST_EXPORT GType _gst_event_type;
220 #define GST_TYPE_EVENT (_gst_event_type)
221 #define GST_IS_EVENT(obj) (GST_IS_MINI_OBJECT_TYPE (obj, GST_TYPE_EVENT))
222 #define GST_EVENT_CAST(obj) ((GstEvent *)(obj))
223 #define GST_EVENT(obj) (GST_EVENT_CAST(obj))
227 * @event: the event to query
229 * Get the #GstEventType of the event.
231 #define GST_EVENT_TYPE(event) (GST_EVENT_CAST(event)->type)
234 * GST_EVENT_TYPE_NAME:
235 * @event: the event to query
237 * Get a constant string representation of the #GstEventType of the event.
239 #define GST_EVENT_TYPE_NAME(event) (gst_event_type_get_name(GST_EVENT_TYPE(event)))
242 * GST_EVENT_TIMESTAMP:
243 * @event: the event to query
245 * Get the #GstClockTime timestamp of the event. This is the time when the event
248 #define GST_EVENT_TIMESTAMP(event) (GST_EVENT_CAST(event)->timestamp)
252 * @event: the event to query
254 * The sequence number of @event.
256 #define GST_EVENT_SEQNUM(event) (GST_EVENT_CAST(event)->seqnum)
259 * GST_EVENT_IS_UPSTREAM:
260 * @ev: the event to query
262 * Check if an event can travel upstream.
264 #define GST_EVENT_IS_UPSTREAM(ev) !!(GST_EVENT_TYPE (ev) & GST_EVENT_TYPE_UPSTREAM)
266 * GST_EVENT_IS_DOWNSTREAM:
267 * @ev: the event to query
269 * Check if an event can travel downstream.
271 #define GST_EVENT_IS_DOWNSTREAM(ev) !!(GST_EVENT_TYPE (ev) & GST_EVENT_TYPE_DOWNSTREAM)
273 * GST_EVENT_IS_SERIALIZED:
274 * @ev: the event to query
276 * Check if an event is serialized with the data stream.
278 #define GST_EVENT_IS_SERIALIZED(ev) !!(GST_EVENT_TYPE (ev) & GST_EVENT_TYPE_SERIALIZED)
280 * GST_EVENT_IS_STICKY:
281 * @ev: the event to query
283 * Check if an event is sticky on the pads.
285 #define GST_EVENT_IS_STICKY(ev) !!(GST_EVENT_TYPE (ev) & GST_EVENT_TYPE_STICKY)
288 * gst_event_is_writable:
291 * Tests if you can safely write data into a event's structure or validly
292 * modify the seqnum and timestamp field.
294 #define gst_event_is_writable(ev) gst_mini_object_is_writable (GST_MINI_OBJECT_CAST (ev))
296 * gst_event_make_writable:
297 * @ev: (transfer full): a #GstEvent
299 * Makes a writable event from the given event. If the source event is
300 * already writable, this will simply return the same event. A copy will
301 * otherwise be made using gst_event_copy().
303 * Returns: (transfer full): a writable event which may or may not be the
306 #define gst_event_make_writable(ev) GST_EVENT_CAST (gst_mini_object_make_writable (GST_MINI_OBJECT_CAST (ev)))
309 * @old_event: (inout) (transfer full) (nullable): pointer to a
310 * pointer to a #GstEvent to be replaced.
311 * @new_event: (allow-none) (transfer none): pointer to a #GstEvent that will
312 * replace the event pointed to by @old_event.
314 * Modifies a pointer to a #GstEvent to point to a different #GstEvent. The
315 * modification is done atomically (so this is useful for ensuring thread safety
316 * in some cases), and the reference counts are updated appropriately (the old
317 * event is unreffed, the new one is reffed).
319 * Either @new_event or the #GstEvent pointed to by @old_event may be %NULL.
321 * Returns: %TRUE if @new_event was different from @old_event
323 static inline gboolean
324 gst_event_replace (GstEvent **old_event, GstEvent *new_event)
326 return gst_mini_object_replace ((GstMiniObject **) old_event, (GstMiniObject *) new_event);
331 * @old_event: (inout) (transfer full) (nullable): pointer to a
332 * pointer to a #GstEvent to be stolen.
334 * Atomically replace the #GstEvent pointed to by @old_event with %NULL and
335 * return the original event.
337 * Returns: the #GstEvent that was in @old_event
339 static inline GstEvent *
340 gst_event_steal (GstEvent **old_event)
342 return GST_EVENT_CAST (gst_mini_object_steal ((GstMiniObject **) old_event));
347 * @old_event: (inout) (transfer full) (nullable): pointer to a
348 * pointer to a #GstEvent to be stolen.
349 * @new_event: (allow-none) (transfer full): pointer to a #GstEvent that will
350 * replace the event pointed to by @old_event.
352 * Modifies a pointer to a #GstEvent to point to a different #GstEvent. This
353 * function is similar to gst_event_replace() except that it takes ownership of
356 * Either @new_event or the #GstEvent pointed to by @old_event may be %NULL.
358 * Returns: %TRUE if @new_event was different from @old_event
360 static inline gboolean
361 gst_event_take (GstEvent **old_event, GstEvent *new_event)
363 return gst_mini_object_take ((GstMiniObject **) old_event, (GstMiniObject *) new_event);
368 * @GST_QOS_TYPE_OVERFLOW: The QoS event type that is produced when upstream
369 * elements are producing data too quickly and the element can't keep up
370 * processing the data. Upstream should reduce their production rate. This
371 * type is also used when buffers arrive early or in time.
372 * @GST_QOS_TYPE_UNDERFLOW: The QoS event type that is produced when upstream
373 * elements are producing data too slowly and need to speed up their
375 * @GST_QOS_TYPE_THROTTLE: The QoS event type that is produced when the
376 * application enabled throttling to limit the data rate.
378 * The different types of QoS events that can be given to the
379 * gst_event_new_qos() method.
382 GST_QOS_TYPE_OVERFLOW = 0,
383 GST_QOS_TYPE_UNDERFLOW = 1,
384 GST_QOS_TYPE_THROTTLE = 2
390 * @mini_object: the parent structure
391 * @type: the #GstEventType of the event
392 * @timestamp: the timestamp of the event
393 * @seqnum: the sequence number of the event
398 GstMiniObject mini_object;
400 /*< public >*/ /* with COW */
406 const gchar* gst_event_type_get_name (GstEventType type);
407 GQuark gst_event_type_to_quark (GstEventType type);
409 gst_event_type_get_flags (GstEventType type);
415 * @event: The event to refcount
417 * Increase the refcount of this event.
419 * Returns: (transfer full): @event (for convenience when doing assignments)
421 static inline GstEvent *
422 gst_event_ref (GstEvent * event)
424 return (GstEvent *) gst_mini_object_ref (GST_MINI_OBJECT_CAST (event));
429 * @event: (transfer full): the event to refcount
431 * Decrease the refcount of an event, freeing it if the refcount reaches 0.
434 gst_event_unref (GstEvent * event)
436 gst_mini_object_unref (GST_MINI_OBJECT_CAST (event));
442 * @event: The event to copy
444 * Copy the event using the event specific copy function.
446 * Returns: (transfer full): the new event
448 static inline GstEvent *
449 gst_event_copy (const GstEvent * event)
451 return GST_EVENT_CAST (gst_mini_object_copy (GST_MINI_OBJECT_CONST_CAST (event)));
454 GType gst_event_get_type (void);
457 GstEvent* gst_event_new_custom (GstEventType type, GstStructure *structure) G_GNUC_MALLOC;
460 gst_event_get_structure (GstEvent *event);
461 GstStructure * gst_event_writable_structure (GstEvent *event);
463 gboolean gst_event_has_name (GstEvent *event, const gchar *name);
465 /* identifiers for events and messages */
466 guint32 gst_event_get_seqnum (GstEvent *event);
467 void gst_event_set_seqnum (GstEvent *event, guint32 seqnum);
469 /* accumulated pad offsets for the event */
470 gint64 gst_event_get_running_time_offset (GstEvent *event);
471 void gst_event_set_running_time_offset (GstEvent *event, gint64 offset);
473 /* Stream start event */
474 GstEvent * gst_event_new_stream_start (const gchar *stream_id) G_GNUC_MALLOC;
475 void gst_event_parse_stream_start (GstEvent *event, const gchar **stream_id);
476 void gst_event_set_stream (GstEvent *event, GstStream *stream);
477 void gst_event_parse_stream (GstEvent *event, GstStream **stream);
479 void gst_event_set_stream_flags (GstEvent *event, GstStreamFlags flags);
480 void gst_event_parse_stream_flags (GstEvent *event, GstStreamFlags *flags);
482 void gst_event_set_group_id (GstEvent *event, guint group_id);
483 gboolean gst_event_parse_group_id (GstEvent *event, guint *group_id);
486 GstEvent * gst_event_new_flush_start (void) G_GNUC_MALLOC;
488 GstEvent * gst_event_new_flush_stop (gboolean reset_time) G_GNUC_MALLOC;
489 void gst_event_parse_flush_stop (GstEvent *event, gboolean *reset_time);
491 /* Stream collection event */
492 GstEvent * gst_event_new_stream_collection (GstStreamCollection *collection) G_GNUC_MALLOC;
493 void gst_event_parse_stream_collection (GstEvent *event, GstStreamCollection **collection);
495 /* select streams event */
496 GstEvent * gst_event_new_select_streams (GList *streams);
497 void gst_event_parse_select_streams (GstEvent *event, GList **streams);
500 GstEvent * gst_event_new_eos (void) G_GNUC_MALLOC;
503 GstEvent * gst_event_new_gap (GstClockTime timestamp,
504 GstClockTime duration) G_GNUC_MALLOC;
506 void gst_event_parse_gap (GstEvent * event,
507 GstClockTime * timestamp,
508 GstClockTime * duration);
511 GstEvent * gst_event_new_caps (GstCaps *caps) G_GNUC_MALLOC;
512 void gst_event_parse_caps (GstEvent *event, GstCaps **caps);
515 GstEvent* gst_event_new_segment (const GstSegment *segment) G_GNUC_MALLOC;
516 void gst_event_parse_segment (GstEvent *event, const GstSegment **segment);
517 void gst_event_copy_segment (GstEvent *event, GstSegment *segment);
520 GstEvent* gst_event_new_tag (GstTagList *taglist) G_GNUC_MALLOC;
521 void gst_event_parse_tag (GstEvent *event, GstTagList **taglist);
524 GstEvent* gst_event_new_toc (GstToc *toc, gboolean updated);
525 void gst_event_parse_toc (GstEvent *event, GstToc **toc, gboolean *updated);
527 /* Protection event */
528 GstEvent * gst_event_new_protection (const gchar * system_id, GstBuffer * data, const gchar * origin);
530 void gst_event_parse_protection (GstEvent * event, const gchar ** system_id,
531 GstBuffer ** data, const gchar ** origin);
534 GstEvent * gst_event_new_buffer_size (GstFormat format, gint64 minsize, gint64 maxsize,
535 gboolean async) G_GNUC_MALLOC;
536 void gst_event_parse_buffer_size (GstEvent *event, GstFormat *format, gint64 *minsize,
537 gint64 *maxsize, gboolean *async);
540 GstEvent* gst_event_new_sink_message (const gchar *name, GstMessage *msg) G_GNUC_MALLOC;
541 void gst_event_parse_sink_message (GstEvent *event, GstMessage **msg);
544 GstEvent* gst_event_new_qos (GstQOSType type, gdouble proportion,
545 GstClockTimeDiff diff, GstClockTime timestamp) G_GNUC_MALLOC;
546 void gst_event_parse_qos (GstEvent *event, GstQOSType *type,
547 gdouble *proportion, GstClockTimeDiff *diff,
548 GstClockTime *timestamp);
550 GstEvent* gst_event_new_seek (gdouble rate, GstFormat format, GstSeekFlags flags,
551 GstSeekType start_type, gint64 start,
552 GstSeekType stop_type, gint64 stop) G_GNUC_MALLOC;
553 void gst_event_parse_seek (GstEvent *event, gdouble *rate, GstFormat *format,
555 GstSeekType *start_type, gint64 *start,
556 GstSeekType *stop_type, gint64 *stop);
558 /* navigation event */
559 GstEvent* gst_event_new_navigation (GstStructure *structure) G_GNUC_MALLOC;
562 GstEvent* gst_event_new_latency (GstClockTime latency) G_GNUC_MALLOC;
563 void gst_event_parse_latency (GstEvent *event, GstClockTime *latency);
566 GstEvent* gst_event_new_step (GstFormat format, guint64 amount, gdouble rate,
567 gboolean flush, gboolean intermediate) G_GNUC_MALLOC;
568 void gst_event_parse_step (GstEvent *event, GstFormat *format, guint64 *amount,
569 gdouble *rate, gboolean *flush, gboolean *intermediate);
571 /* renegotiate event */
572 GstEvent* gst_event_new_reconfigure (void) G_GNUC_MALLOC;
574 /* TOC select event */
575 GstEvent* gst_event_new_toc_select (const gchar *uid) G_GNUC_MALLOC;
576 void gst_event_parse_toc_select (GstEvent *event, gchar **uid);
578 /* segment-done event */
579 GstEvent* gst_event_new_segment_done (GstFormat format, gint64 position) G_GNUC_MALLOC;
580 void gst_event_parse_segment_done (GstEvent *event, GstFormat *format, gint64 *position);
582 #ifdef G_DEFINE_AUTOPTR_CLEANUP_FUNC
583 G_DEFINE_AUTOPTR_CLEANUP_FUNC(GstEvent, gst_event_unref)
588 #endif /* __GST_EVENT_H__ */