gstreamer/gst/gstevent.h
Niels De Graef 09141c6e1f Use G_DEFINE_AUTOPTR_CLEANUP_FUNC unconditionally
Since we started depending on GLib 2.44, we can be sure this macro is
defined (it will be a no-op on compilers that don't support it). For
plugins we should just start using `G_DECLARE_FINAL_TYPE` which means
we no longer need the macro there, but for most types in core we don't
want to break ABI, which means it's better to just keep it like it is
(and use the `#ifdef` instead).
2019-06-04 08:50:59 +02:00

738 lines
27 KiB
C

/* GStreamer
* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
* 2000 Wim Taymans <wim.taymans@chello.be>
* 2005 Wim Taymans <wim@fluendo.com>
*
* 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., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifndef __GST_EVENT_H__
#define __GST_EVENT_H__
typedef struct _GstEvent GstEvent;
/**
* GstEventTypeFlags:
* @GST_EVENT_TYPE_UPSTREAM: Set if the event can travel upstream.
* @GST_EVENT_TYPE_DOWNSTREAM: Set if the event can travel downstream.
* @GST_EVENT_TYPE_SERIALIZED: Set if the event should be serialized with data
* flow.
* @GST_EVENT_TYPE_STICKY: Set if the event is sticky on the pads.
* @GST_EVENT_TYPE_STICKY_MULTI: Multiple sticky events can be on a pad, each
* identified by the event name.
*
* #GstEventTypeFlags indicate the aspects of the different #GstEventType
* values. You can get the type flags of a #GstEventType with the
* gst_event_type_get_flags() function.
*/
typedef enum {
GST_EVENT_TYPE_UPSTREAM = 1 << 0,
GST_EVENT_TYPE_DOWNSTREAM = 1 << 1,
GST_EVENT_TYPE_SERIALIZED = 1 << 2,
GST_EVENT_TYPE_STICKY = 1 << 3,
GST_EVENT_TYPE_STICKY_MULTI = 1 << 4
} GstEventTypeFlags;
/**
* GST_EVENT_TYPE_BOTH: (value 3) (type GstEventTypeFlags)
*
* The same thing as #GST_EVENT_TYPE_UPSTREAM | #GST_EVENT_TYPE_DOWNSTREAM.
*/
#define GST_EVENT_TYPE_BOTH \
((GstEventTypeFlags)(GST_EVENT_TYPE_UPSTREAM | GST_EVENT_TYPE_DOWNSTREAM))
#define GST_EVENT_NUM_SHIFT (8)
/**
* GST_EVENT_MAKE_TYPE:
* @num: the event number to create
* @flags: the event flags
*
* when making custom event types, use this macro with the num and
* the given flags
*/
#define GST_EVENT_MAKE_TYPE(num,flags) \
(((num) << GST_EVENT_NUM_SHIFT) | (flags))
#define FLAG(name) GST_EVENT_TYPE_##name
/**
* GstEventType:
* @GST_EVENT_UNKNOWN: unknown event.
* @GST_EVENT_FLUSH_START: Start a flush operation. This event clears all data
* from the pipeline and unblock all streaming threads.
* @GST_EVENT_FLUSH_STOP: Stop a flush operation. This event resets the
* running-time of the pipeline.
* @GST_EVENT_SELECT_STREAMS: A request to select one or more streams (Since: 1.10)
* @GST_EVENT_STREAM_START: Event to mark the start of a new stream. Sent before any
* other serialized event and only sent at the start of a new stream,
* not after flushing seeks.
* @GST_EVENT_CAPS: #GstCaps event. Notify the pad of a new media type.
* @GST_EVENT_SEGMENT: A new media segment follows in the dataflow. The
* segment events contains information for clipping buffers and
* converting buffer timestamps to running-time and
* stream-time.
* @GST_EVENT_STREAM_COLLECTION: A new #GstStreamCollection is available (Since: 1.10)
* @GST_EVENT_TAG: A new set of metadata tags has been found in the stream.
* @GST_EVENT_BUFFERSIZE: Notification of buffering requirements. Currently not
* used yet.
* @GST_EVENT_SINK_MESSAGE: An event that sinks turn into a message. Used to
* send messages that should be emitted in sync with
* rendering.
* @GST_EVENT_STREAM_GROUP_DONE: Indicates that there is no more data for
* the stream group ID in the message. Sent before EOS
* in some instances and should be handled mostly the same. (Since: 1.10)
* @GST_EVENT_EOS: End-Of-Stream. No more data is to be expected to follow
* without either a STREAM_START event, or a FLUSH_STOP and a SEGMENT
* event.
* @GST_EVENT_SEGMENT_DONE: Marks the end of a segment playback.
* @GST_EVENT_GAP: Marks a gap in the datastream.
* @GST_EVENT_TOC: An event which indicates that a new table of contents (TOC)
* was found or updated.
* @GST_EVENT_PROTECTION: An event which indicates that new or updated
* encryption information has been found in the stream.
* @GST_EVENT_QOS: A quality message. Used to indicate to upstream elements
* that the downstream elements should adjust their processing
* rate.
* @GST_EVENT_SEEK: A request for a new playback position and rate.
* @GST_EVENT_NAVIGATION: Navigation events are usually used for communicating
* user requests, such as mouse or keyboard movements,
* to upstream elements.
* @GST_EVENT_LATENCY: Notification of new latency adjustment. Sinks will use
* the latency information to adjust their synchronisation.
* @GST_EVENT_STEP: A request for stepping through the media. Sinks will usually
* execute the step operation.
* @GST_EVENT_RECONFIGURE: A request for upstream renegotiating caps and reconfiguring.
* @GST_EVENT_TOC_SELECT: A request for a new playback position based on TOC
* entry's UID.
* @GST_EVENT_CUSTOM_UPSTREAM: Upstream custom event
* @GST_EVENT_CUSTOM_DOWNSTREAM: Downstream custom event that travels in the
* data flow.
* @GST_EVENT_CUSTOM_DOWNSTREAM_OOB: Custom out-of-band downstream event.
* @GST_EVENT_CUSTOM_DOWNSTREAM_STICKY: Custom sticky downstream event.
* @GST_EVENT_CUSTOM_BOTH: Custom upstream or downstream event.
* In-band when travelling downstream.
* @GST_EVENT_CUSTOM_BOTH_OOB: Custom upstream or downstream out-of-band event.
*
* #GstEventType lists the standard event types that can be sent in a pipeline.
*
* The custom event types can be used for private messages between elements
* that can't be expressed using normal
* GStreamer buffer passing semantics. Custom events carry an arbitrary
* #GstStructure.
* Specific custom events are distinguished by the name of the structure.
*/
/* NOTE: keep in sync with quark registration in gstevent.c */
typedef enum {
GST_EVENT_UNKNOWN = GST_EVENT_MAKE_TYPE (0, 0),
/* bidirectional events */
GST_EVENT_FLUSH_START = GST_EVENT_MAKE_TYPE (10, FLAG(BOTH)),
GST_EVENT_FLUSH_STOP = GST_EVENT_MAKE_TYPE (20, FLAG(BOTH) | FLAG(SERIALIZED)),
/* downstream serialized events */
GST_EVENT_STREAM_START = GST_EVENT_MAKE_TYPE (40, FLAG(DOWNSTREAM) | FLAG(SERIALIZED) | FLAG(STICKY)),
GST_EVENT_CAPS = GST_EVENT_MAKE_TYPE (50, FLAG(DOWNSTREAM) | FLAG(SERIALIZED) | FLAG(STICKY)),
GST_EVENT_SEGMENT = GST_EVENT_MAKE_TYPE (70, FLAG(DOWNSTREAM) | FLAG(SERIALIZED) | FLAG(STICKY)),
GST_EVENT_STREAM_COLLECTION = GST_EVENT_MAKE_TYPE (75, FLAG(DOWNSTREAM) | FLAG(SERIALIZED) | FLAG(STICKY) | FLAG(STICKY_MULTI)),
GST_EVENT_TAG = GST_EVENT_MAKE_TYPE (80, FLAG(DOWNSTREAM) | FLAG(SERIALIZED) | FLAG(STICKY) | FLAG(STICKY_MULTI)),
GST_EVENT_BUFFERSIZE = GST_EVENT_MAKE_TYPE (90, FLAG(DOWNSTREAM) | FLAG(SERIALIZED) | FLAG(STICKY)),
GST_EVENT_SINK_MESSAGE = GST_EVENT_MAKE_TYPE (100, FLAG(DOWNSTREAM) | FLAG(SERIALIZED) | FLAG(STICKY) | FLAG(STICKY_MULTI)),
GST_EVENT_STREAM_GROUP_DONE = GST_EVENT_MAKE_TYPE (105, FLAG(DOWNSTREAM) | FLAG(SERIALIZED) | FLAG(STICKY)),
GST_EVENT_EOS = GST_EVENT_MAKE_TYPE (110, FLAG(DOWNSTREAM) | FLAG(SERIALIZED) | FLAG(STICKY)),
GST_EVENT_TOC = GST_EVENT_MAKE_TYPE (120, FLAG(DOWNSTREAM) | FLAG(SERIALIZED) | FLAG(STICKY) | FLAG(STICKY_MULTI)),
GST_EVENT_PROTECTION = GST_EVENT_MAKE_TYPE (130, FLAG (DOWNSTREAM) | FLAG (SERIALIZED) | FLAG (STICKY) | FLAG (STICKY_MULTI)),
/* non-sticky downstream serialized */
GST_EVENT_SEGMENT_DONE = GST_EVENT_MAKE_TYPE (150, FLAG(DOWNSTREAM) | FLAG(SERIALIZED)),
GST_EVENT_GAP = GST_EVENT_MAKE_TYPE (160, FLAG(DOWNSTREAM) | FLAG(SERIALIZED)),
/* upstream events */
GST_EVENT_QOS = GST_EVENT_MAKE_TYPE (190, FLAG(UPSTREAM)),
GST_EVENT_SEEK = GST_EVENT_MAKE_TYPE (200, FLAG(UPSTREAM)),
GST_EVENT_NAVIGATION = GST_EVENT_MAKE_TYPE (210, FLAG(UPSTREAM)),
GST_EVENT_LATENCY = GST_EVENT_MAKE_TYPE (220, FLAG(UPSTREAM)),
GST_EVENT_STEP = GST_EVENT_MAKE_TYPE (230, FLAG(UPSTREAM)),
GST_EVENT_RECONFIGURE = GST_EVENT_MAKE_TYPE (240, FLAG(UPSTREAM)),
GST_EVENT_TOC_SELECT = GST_EVENT_MAKE_TYPE (250, FLAG(UPSTREAM)),
GST_EVENT_SELECT_STREAMS = GST_EVENT_MAKE_TYPE (260, FLAG(UPSTREAM)),
/* custom events start here */
GST_EVENT_CUSTOM_UPSTREAM = GST_EVENT_MAKE_TYPE (270, FLAG(UPSTREAM)),
GST_EVENT_CUSTOM_DOWNSTREAM = GST_EVENT_MAKE_TYPE (280, FLAG(DOWNSTREAM) | FLAG(SERIALIZED)),
GST_EVENT_CUSTOM_DOWNSTREAM_OOB = GST_EVENT_MAKE_TYPE (290, FLAG(DOWNSTREAM)),
GST_EVENT_CUSTOM_DOWNSTREAM_STICKY = GST_EVENT_MAKE_TYPE (300, FLAG(DOWNSTREAM) | FLAG(SERIALIZED) | FLAG(STICKY) | FLAG(STICKY_MULTI)),
GST_EVENT_CUSTOM_BOTH = GST_EVENT_MAKE_TYPE (310, FLAG(BOTH) | FLAG(SERIALIZED)),
GST_EVENT_CUSTOM_BOTH_OOB = GST_EVENT_MAKE_TYPE (320, FLAG(BOTH))
} GstEventType;
#undef FLAG
/**
* GstStreamFlags:
* @GST_STREAM_FLAG_NONE: This stream has no special attributes
* @GST_STREAM_FLAG_SPARSE: This stream is a sparse stream (e.g. a subtitle
* stream), data may flow only in irregular intervals with large gaps in
* between.
* @GST_STREAM_FLAG_SELECT: This stream should be selected by default. This
* flag may be used by demuxers to signal that a stream should be selected
* by default in a playback scenario.
* @GST_STREAM_FLAG_UNSELECT: This stream should not be selected by default.
* This flag may be used by demuxers to signal that a stream should not
* be selected by default in a playback scenario, but only if explicitly
* selected by the user (e.g. an audio track for the hard of hearing or
* a director's commentary track).
*
* Since: 1.2
*/
typedef enum {
GST_STREAM_FLAG_NONE,
GST_STREAM_FLAG_SPARSE = (1 << 0),
GST_STREAM_FLAG_SELECT = (1 << 1),
GST_STREAM_FLAG_UNSELECT = (1 << 2)
} GstStreamFlags;
#include <gst/gstminiobject.h>
#include <gst/gstformat.h>
#include <gst/gstobject.h>
#include <gst/gstclock.h>
#include <gst/gststructure.h>
#include <gst/gsttaglist.h>
#include <gst/gstsegment.h>
#include <gst/gstmessage.h>
#include <gst/gstcontext.h>
#include <gst/gststreams.h>
#include <gst/gsttoc.h>
#include <gst/gststreamcollection.h>
G_BEGIN_DECLS
GST_API GType _gst_event_type;
#define GST_TYPE_EVENT (_gst_event_type)
#define GST_IS_EVENT(obj) (GST_IS_MINI_OBJECT_TYPE (obj, GST_TYPE_EVENT))
#define GST_EVENT_CAST(obj) ((GstEvent *)(obj))
#define GST_EVENT(obj) (GST_EVENT_CAST(obj))
/**
* GST_EVENT_TYPE:
* @event: the event to query
*
* Get the #GstEventType of the event.
*/
#define GST_EVENT_TYPE(event) (GST_EVENT_CAST(event)->type)
/**
* GST_EVENT_TYPE_NAME:
* @event: the event to query
*
* Get a constant string representation of the #GstEventType of the event.
*/
#define GST_EVENT_TYPE_NAME(event) (gst_event_type_get_name(GST_EVENT_TYPE(event)))
/**
* GST_EVENT_TIMESTAMP:
* @event: the event to query
*
* Get the #GstClockTime timestamp of the event. This is the time when the event
* was created.
*/
/* FIXME 2.0: Remove the GstEvent::timestamp field */
#define GST_EVENT_TIMESTAMP(event) (GST_EVENT_CAST(event)->timestamp)
/**
* GST_EVENT_SEQNUM:
* @event: the event to query
*
* The sequence number of @event.
*/
#define GST_EVENT_SEQNUM(event) (GST_EVENT_CAST(event)->seqnum)
/**
* GST_EVENT_IS_UPSTREAM:
* @ev: the event to query
*
* Check if an event can travel upstream.
*/
#define GST_EVENT_IS_UPSTREAM(ev) !!(GST_EVENT_TYPE (ev) & GST_EVENT_TYPE_UPSTREAM)
/**
* GST_EVENT_IS_DOWNSTREAM:
* @ev: the event to query
*
* Check if an event can travel downstream.
*/
#define GST_EVENT_IS_DOWNSTREAM(ev) !!(GST_EVENT_TYPE (ev) & GST_EVENT_TYPE_DOWNSTREAM)
/**
* GST_EVENT_IS_SERIALIZED:
* @ev: the event to query
*
* Check if an event is serialized with the data stream.
*/
#define GST_EVENT_IS_SERIALIZED(ev) !!(GST_EVENT_TYPE (ev) & GST_EVENT_TYPE_SERIALIZED)
/**
* GST_EVENT_IS_STICKY:
* @ev: the event to query
*
* Check if an event is sticky on the pads.
*/
#define GST_EVENT_IS_STICKY(ev) !!(GST_EVENT_TYPE (ev) & GST_EVENT_TYPE_STICKY)
/**
* gst_event_is_writable:
* @ev: a #GstEvent
*
* Tests if you can safely write data into a event's structure or validly
* modify the seqnum and timestamp field.
*/
#define gst_event_is_writable(ev) gst_mini_object_is_writable (GST_MINI_OBJECT_CAST (ev))
/**
* gst_event_make_writable:
* @ev: (transfer full): a #GstEvent
*
* Makes a writable event from the given event. If the source event is
* already writable, this will simply return the same event. A copy will
* otherwise be made using gst_event_copy().
*
* Returns: (transfer full): a writable event which may or may not be the
* same as @ev
*/
#define gst_event_make_writable(ev) GST_EVENT_CAST (gst_mini_object_make_writable (GST_MINI_OBJECT_CAST (ev)))
/**
* gst_event_replace: (skip)
* @old_event: (inout) (transfer full) (nullable): pointer to a
* pointer to a #GstEvent to be replaced.
* @new_event: (allow-none) (transfer none): pointer to a #GstEvent that will
* replace the event pointed to by @old_event.
*
* Modifies a pointer to a #GstEvent to point to a different #GstEvent. The
* modification is done atomically (so this is useful for ensuring thread safety
* in some cases), and the reference counts are updated appropriately (the old
* event is unreffed, the new one is reffed).
*
* Either @new_event or the #GstEvent pointed to by @old_event may be %NULL.
*
* Returns: %TRUE if @new_event was different from @old_event
*/
static inline gboolean gst_event_replace(GstEvent** old_event, GstEvent* new_event);
static inline gboolean
gst_event_replace(GstEvent** old_event, GstEvent* new_event)
{
return gst_mini_object_replace ((GstMiniObject **) old_event, (GstMiniObject *) new_event);
}
/**
* gst_event_steal: (skip)
* @old_event: (inout) (transfer full) (nullable): pointer to a
* pointer to a #GstEvent to be stolen.
*
* Atomically replace the #GstEvent pointed to by @old_event with %NULL and
* return the original event.
*
* Returns: the #GstEvent that was in @old_event
*/
static inline GstEvent* gst_event_steal(GstEvent** old_event);
static inline GstEvent *
gst_event_steal (GstEvent **old_event)
{
return GST_EVENT_CAST (gst_mini_object_steal ((GstMiniObject **) old_event));
}
/**
* gst_event_take: (skip)
* @old_event: (inout) (transfer full) (nullable): pointer to a
* pointer to a #GstEvent to be stolen.
* @new_event: (allow-none) (transfer full): pointer to a #GstEvent that will
* replace the event pointed to by @old_event.
*
* Modifies a pointer to a #GstEvent to point to a different #GstEvent. This
* function is similar to gst_event_replace() except that it takes ownership of
* @new_event.
*
* Either @new_event or the #GstEvent pointed to by @old_event may be %NULL.
*
* Returns: %TRUE if @new_event was different from @old_event
*/
static inline gboolean gst_event_take(GstEvent** old_event, GstEvent* new_event);
static inline gboolean
gst_event_take (GstEvent **old_event, GstEvent *new_event)
{
return gst_mini_object_take ((GstMiniObject **) old_event, (GstMiniObject *) new_event);
}
/**
* GstQOSType:
* @GST_QOS_TYPE_OVERFLOW: The QoS event type that is produced when upstream
* elements are producing data too quickly and the element can't keep up
* processing the data. Upstream should reduce their production rate. This
* type is also used when buffers arrive early or in time.
* @GST_QOS_TYPE_UNDERFLOW: The QoS event type that is produced when upstream
* elements are producing data too slowly and need to speed up their
* production rate.
* @GST_QOS_TYPE_THROTTLE: The QoS event type that is produced when the
* application enabled throttling to limit the data rate.
*
* The different types of QoS events that can be given to the
* gst_event_new_qos() method.
*/
typedef enum {
GST_QOS_TYPE_OVERFLOW = 0,
GST_QOS_TYPE_UNDERFLOW = 1,
GST_QOS_TYPE_THROTTLE = 2
} GstQOSType;
/**
* GstEvent:
* @mini_object: the parent structure
* @type: the #GstEventType of the event
* @timestamp: the timestamp of the event
* @seqnum: the sequence number of the event
*
* A #GstEvent.
*/
struct _GstEvent {
GstMiniObject mini_object;
/*< public >*/ /* with COW */
GstEventType type;
/* FIXME 2.0: Remove the GstEvent::timestamp field */
guint64 timestamp;
guint32 seqnum;
};
GST_API
const gchar* gst_event_type_get_name (GstEventType type);
GST_API
GQuark gst_event_type_to_quark (GstEventType type);
GST_API
GstEventTypeFlags
gst_event_type_get_flags (GstEventType type);
/* refcounting */
/**
* gst_event_ref: (skip)
* @event: The event to refcount
*
* Increase the refcount of this event.
*
* Returns: (transfer full): @event (for convenience when doing assignments)
*/
static inline GstEvent* gst_event_ref(GstEvent* event);
static inline GstEvent *
gst_event_ref (GstEvent * event)
{
return (GstEvent *) gst_mini_object_ref (GST_MINI_OBJECT_CAST (event));
}
/**
* gst_event_unref: (skip)
* @event: (transfer full): the event to refcount
*
* Decrease the refcount of an event, freeing it if the refcount reaches 0.
*/
static inline void gst_event_unref(GstEvent* event);
static inline void
gst_event_unref (GstEvent * event)
{
gst_mini_object_unref (GST_MINI_OBJECT_CAST (event));
}
/**
* gst_clear_event: (skip)
* @event_ptr: a pointer to a #GstEvent reference
*
* Clears a reference to a #GstEvent.
*
* @event_ptr must not be %NULL.
*
* If the reference is %NULL then this function does nothing. Otherwise, the
* reference count of the event is decreased and the pointer is set to %NULL.
*
* Since: 1.16
*/
static inline void
gst_clear_event (GstEvent ** event_ptr)
{
gst_clear_mini_object ((GstMiniObject **) event_ptr);
}
/* copy event */
/**
* gst_event_copy: (skip)
* @event: The event to copy
*
* Copy the event using the event specific copy function.
*
* Returns: (transfer full): the new event
*/
static inline GstEvent* gst_event_copy(const GstEvent* event);
static inline GstEvent *
gst_event_copy (const GstEvent * event)
{
return GST_EVENT_CAST (gst_mini_object_copy (GST_MINI_OBJECT_CONST_CAST (event)));
}
GST_API
GType gst_event_get_type (void);
/* custom event */
GST_API
GstEvent* gst_event_new_custom (GstEventType type, GstStructure *structure) G_GNUC_MALLOC;
GST_API
const GstStructure *
gst_event_get_structure (GstEvent *event);
GST_API
GstStructure * gst_event_writable_structure (GstEvent *event);
GST_API
gboolean gst_event_has_name (GstEvent *event, const gchar *name);
/* identifiers for events and messages */
GST_API
guint32 gst_event_get_seqnum (GstEvent *event);
GST_API
void gst_event_set_seqnum (GstEvent *event, guint32 seqnum);
/* accumulated pad offsets for the event */
GST_API
gint64 gst_event_get_running_time_offset (GstEvent *event);
GST_API
void gst_event_set_running_time_offset (GstEvent *event, gint64 offset);
/* Stream start event */
GST_API
GstEvent * gst_event_new_stream_start (const gchar *stream_id) G_GNUC_MALLOC;
GST_API
void gst_event_parse_stream_start (GstEvent *event, const gchar **stream_id);
GST_API
void gst_event_set_stream (GstEvent *event, GstStream *stream);
GST_API
void gst_event_parse_stream (GstEvent *event, GstStream **stream);
GST_API
void gst_event_set_stream_flags (GstEvent *event, GstStreamFlags flags);
GST_API
void gst_event_parse_stream_flags (GstEvent *event, GstStreamFlags *flags);
GST_API
void gst_event_set_group_id (GstEvent *event, guint group_id);
GST_API
gboolean gst_event_parse_group_id (GstEvent *event, guint *group_id);
/* flush events */
GST_API
GstEvent * gst_event_new_flush_start (void) G_GNUC_MALLOC;
GST_API
GstEvent * gst_event_new_flush_stop (gboolean reset_time) G_GNUC_MALLOC;
GST_API
void gst_event_parse_flush_stop (GstEvent *event, gboolean *reset_time);
/* Stream collection event */
GST_API
GstEvent * gst_event_new_stream_collection (GstStreamCollection *collection) G_GNUC_MALLOC;
GST_API
void gst_event_parse_stream_collection (GstEvent *event, GstStreamCollection **collection);
/* select streams event */
GST_API
GstEvent * gst_event_new_select_streams (GList *streams);
GST_API
void gst_event_parse_select_streams (GstEvent *event, GList **streams);
/* stream-group-done event */
GST_API
GstEvent * gst_event_new_stream_group_done (guint group_id) G_GNUC_MALLOC;
GST_API
void gst_event_parse_stream_group_done (GstEvent *event, guint *group_id);
/* EOS event */
GST_API
GstEvent * gst_event_new_eos (void) G_GNUC_MALLOC;
/* GAP event */
GST_API
GstEvent * gst_event_new_gap (GstClockTime timestamp,
GstClockTime duration) G_GNUC_MALLOC;
GST_API
void gst_event_parse_gap (GstEvent * event,
GstClockTime * timestamp,
GstClockTime * duration);
/* Caps events */
GST_API
GstEvent * gst_event_new_caps (GstCaps *caps) G_GNUC_MALLOC;
GST_API
void gst_event_parse_caps (GstEvent *event, GstCaps **caps);
/* segment event */
GST_API
GstEvent* gst_event_new_segment (const GstSegment *segment) G_GNUC_MALLOC;
GST_API
void gst_event_parse_segment (GstEvent *event, const GstSegment **segment);
GST_API
void gst_event_copy_segment (GstEvent *event, GstSegment *segment);
/* tag event */
GST_API
GstEvent* gst_event_new_tag (GstTagList *taglist) G_GNUC_MALLOC;
GST_API
void gst_event_parse_tag (GstEvent *event, GstTagList **taglist);
/* TOC event */
GST_API
GstEvent* gst_event_new_toc (GstToc *toc, gboolean updated);
GST_API
void gst_event_parse_toc (GstEvent *event, GstToc **toc, gboolean *updated);
/* Protection event */
GST_API
GstEvent * gst_event_new_protection (const gchar * system_id, GstBuffer * data, const gchar * origin);
GST_API
void gst_event_parse_protection (GstEvent * event, const gchar ** system_id,
GstBuffer ** data, const gchar ** origin);
/* buffer */
GST_API
GstEvent * gst_event_new_buffer_size (GstFormat format, gint64 minsize, gint64 maxsize,
gboolean async) G_GNUC_MALLOC;
GST_API
void gst_event_parse_buffer_size (GstEvent *event, GstFormat *format, gint64 *minsize,
gint64 *maxsize, gboolean *async);
/* sink message */
GST_API
GstEvent* gst_event_new_sink_message (const gchar *name, GstMessage *msg) G_GNUC_MALLOC;
GST_API
void gst_event_parse_sink_message (GstEvent *event, GstMessage **msg);
/* QOS events */
GST_API
GstEvent* gst_event_new_qos (GstQOSType type, gdouble proportion,
GstClockTimeDiff diff, GstClockTime timestamp) G_GNUC_MALLOC;
GST_API
void gst_event_parse_qos (GstEvent *event, GstQOSType *type,
gdouble *proportion, GstClockTimeDiff *diff,
GstClockTime *timestamp);
/* seek event */
GST_API
GstEvent* gst_event_new_seek (gdouble rate, GstFormat format, GstSeekFlags flags,
GstSeekType start_type, gint64 start,
GstSeekType stop_type, gint64 stop) G_GNUC_MALLOC;
GST_API
void gst_event_parse_seek (GstEvent *event, gdouble *rate, GstFormat *format,
GstSeekFlags *flags,
GstSeekType *start_type, gint64 *start,
GstSeekType *stop_type, gint64 *stop);
GST_API
void gst_event_set_seek_trickmode_interval (GstEvent *event, GstClockTime interval);
GST_API
void gst_event_parse_seek_trickmode_interval (GstEvent *event, GstClockTime *interval);
/* navigation event */
GST_API
GstEvent* gst_event_new_navigation (GstStructure *structure) G_GNUC_MALLOC;
/* latency event */
GST_API
GstEvent* gst_event_new_latency (GstClockTime latency) G_GNUC_MALLOC;
GST_API
void gst_event_parse_latency (GstEvent *event, GstClockTime *latency);
/* step event */
GST_API
GstEvent* gst_event_new_step (GstFormat format, guint64 amount, gdouble rate,
gboolean flush, gboolean intermediate) G_GNUC_MALLOC;
GST_API
void gst_event_parse_step (GstEvent *event, GstFormat *format, guint64 *amount,
gdouble *rate, gboolean *flush, gboolean *intermediate);
/* renegotiate event */
GST_API
GstEvent* gst_event_new_reconfigure (void) G_GNUC_MALLOC;
/* TOC select event */
GST_API
GstEvent* gst_event_new_toc_select (const gchar *uid) G_GNUC_MALLOC;
GST_API
void gst_event_parse_toc_select (GstEvent *event, gchar **uid);
/* segment-done event */
GST_API
GstEvent* gst_event_new_segment_done (GstFormat format, gint64 position) G_GNUC_MALLOC;
GST_API
void gst_event_parse_segment_done (GstEvent *event, GstFormat *format, gint64 *position);
G_DEFINE_AUTOPTR_CLEANUP_FUNC(GstEvent, gst_event_unref)
G_END_DECLS
#endif /* __GST_EVENT_H__ */