mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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09141c6e1f
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).
738 lines
27 KiB
C
738 lines
27 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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* 2005 Wim Taymans <wim@fluendo.com>
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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., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, 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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typedef struct _GstEvent GstEvent;
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/**
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* GstEventTypeFlags:
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* @GST_EVENT_TYPE_UPSTREAM: Set if the event can travel upstream.
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* @GST_EVENT_TYPE_DOWNSTREAM: Set if the event can travel downstream.
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* @GST_EVENT_TYPE_SERIALIZED: Set if the event should be serialized with data
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* flow.
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* @GST_EVENT_TYPE_STICKY: Set if the event is sticky on the pads.
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* @GST_EVENT_TYPE_STICKY_MULTI: Multiple sticky events can be on a pad, each
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* identified by the event name.
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*
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* #GstEventTypeFlags indicate the aspects of the different #GstEventType
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* values. You can get the type flags of a #GstEventType with the
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* gst_event_type_get_flags() function.
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*/
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typedef enum {
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GST_EVENT_TYPE_UPSTREAM = 1 << 0,
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GST_EVENT_TYPE_DOWNSTREAM = 1 << 1,
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GST_EVENT_TYPE_SERIALIZED = 1 << 2,
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GST_EVENT_TYPE_STICKY = 1 << 3,
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GST_EVENT_TYPE_STICKY_MULTI = 1 << 4
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} GstEventTypeFlags;
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/**
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* GST_EVENT_TYPE_BOTH: (value 3) (type GstEventTypeFlags)
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*
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* The same thing as #GST_EVENT_TYPE_UPSTREAM | #GST_EVENT_TYPE_DOWNSTREAM.
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*/
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#define GST_EVENT_TYPE_BOTH \
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((GstEventTypeFlags)(GST_EVENT_TYPE_UPSTREAM | GST_EVENT_TYPE_DOWNSTREAM))
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#define GST_EVENT_NUM_SHIFT (8)
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/**
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* GST_EVENT_MAKE_TYPE:
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* @num: the event number to create
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* @flags: the event flags
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*
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* when making custom event types, use this macro with the num and
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* the given flags
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*/
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#define GST_EVENT_MAKE_TYPE(num,flags) \
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(((num) << GST_EVENT_NUM_SHIFT) | (flags))
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#define FLAG(name) GST_EVENT_TYPE_##name
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/**
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* GstEventType:
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* @GST_EVENT_UNKNOWN: unknown event.
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* @GST_EVENT_FLUSH_START: Start a flush operation. This event clears all data
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* from the pipeline and unblock all streaming threads.
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* @GST_EVENT_FLUSH_STOP: Stop a flush operation. This event resets the
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* running-time of the pipeline.
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* @GST_EVENT_SELECT_STREAMS: A request to select one or more streams (Since: 1.10)
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* @GST_EVENT_STREAM_START: Event to mark the start of a new stream. Sent before any
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* other serialized event and only sent at the start of a new stream,
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* not after flushing seeks.
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* @GST_EVENT_CAPS: #GstCaps event. Notify the pad of a new media type.
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* @GST_EVENT_SEGMENT: A new media segment follows in the dataflow. The
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* segment events contains information for clipping buffers and
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* converting buffer timestamps to running-time and
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* stream-time.
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* @GST_EVENT_STREAM_COLLECTION: A new #GstStreamCollection is available (Since: 1.10)
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* @GST_EVENT_TAG: A new set of metadata tags has been found in the stream.
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* @GST_EVENT_BUFFERSIZE: Notification of buffering requirements. Currently not
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* used yet.
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* @GST_EVENT_SINK_MESSAGE: An event that sinks turn into a message. Used to
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* send messages that should be emitted in sync with
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* rendering.
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* @GST_EVENT_STREAM_GROUP_DONE: Indicates that there is no more data for
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* the stream group ID in the message. Sent before EOS
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* in some instances and should be handled mostly the same. (Since: 1.10)
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* @GST_EVENT_EOS: End-Of-Stream. No more data is to be expected to follow
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* without either a STREAM_START event, or a FLUSH_STOP and a SEGMENT
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* event.
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* @GST_EVENT_SEGMENT_DONE: Marks the end of a segment playback.
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* @GST_EVENT_GAP: Marks a gap in the datastream.
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* @GST_EVENT_TOC: An event which indicates that a new table of contents (TOC)
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* was found or updated.
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* @GST_EVENT_PROTECTION: An event which indicates that new or updated
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* encryption information has been found in the stream.
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* @GST_EVENT_QOS: A quality message. Used to indicate to upstream elements
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* that the downstream elements should adjust their processing
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* rate.
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* @GST_EVENT_SEEK: A request for a new playback position and rate.
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* @GST_EVENT_NAVIGATION: Navigation events are usually used for communicating
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* user requests, such as mouse or keyboard movements,
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* to upstream elements.
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* @GST_EVENT_LATENCY: Notification of new latency adjustment. Sinks will use
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* the latency information to adjust their synchronisation.
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* @GST_EVENT_STEP: A request for stepping through the media. Sinks will usually
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* execute the step operation.
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* @GST_EVENT_RECONFIGURE: A request for upstream renegotiating caps and reconfiguring.
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* @GST_EVENT_TOC_SELECT: A request for a new playback position based on TOC
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* entry's UID.
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* @GST_EVENT_CUSTOM_UPSTREAM: Upstream custom event
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* @GST_EVENT_CUSTOM_DOWNSTREAM: Downstream custom event that travels in the
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* data flow.
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* @GST_EVENT_CUSTOM_DOWNSTREAM_OOB: Custom out-of-band downstream event.
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* @GST_EVENT_CUSTOM_DOWNSTREAM_STICKY: Custom sticky downstream event.
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* @GST_EVENT_CUSTOM_BOTH: Custom upstream or downstream event.
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* In-band when travelling downstream.
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* @GST_EVENT_CUSTOM_BOTH_OOB: Custom upstream or downstream out-of-band event.
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*
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* #GstEventType lists the standard event types that can be sent in a pipeline.
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*
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* The custom event types can be used for private messages between elements
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* that can't be expressed using normal
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* GStreamer buffer passing semantics. Custom events carry an arbitrary
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* #GstStructure.
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* Specific custom events are distinguished by the name of the structure.
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*/
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/* NOTE: keep in sync with quark registration in gstevent.c */
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typedef enum {
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GST_EVENT_UNKNOWN = GST_EVENT_MAKE_TYPE (0, 0),
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/* bidirectional events */
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GST_EVENT_FLUSH_START = GST_EVENT_MAKE_TYPE (10, FLAG(BOTH)),
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GST_EVENT_FLUSH_STOP = GST_EVENT_MAKE_TYPE (20, FLAG(BOTH) | FLAG(SERIALIZED)),
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/* downstream serialized events */
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GST_EVENT_STREAM_START = GST_EVENT_MAKE_TYPE (40, FLAG(DOWNSTREAM) | FLAG(SERIALIZED) | FLAG(STICKY)),
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GST_EVENT_CAPS = GST_EVENT_MAKE_TYPE (50, FLAG(DOWNSTREAM) | FLAG(SERIALIZED) | FLAG(STICKY)),
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GST_EVENT_SEGMENT = GST_EVENT_MAKE_TYPE (70, FLAG(DOWNSTREAM) | FLAG(SERIALIZED) | FLAG(STICKY)),
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GST_EVENT_STREAM_COLLECTION = GST_EVENT_MAKE_TYPE (75, FLAG(DOWNSTREAM) | FLAG(SERIALIZED) | FLAG(STICKY) | FLAG(STICKY_MULTI)),
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GST_EVENT_TAG = GST_EVENT_MAKE_TYPE (80, FLAG(DOWNSTREAM) | FLAG(SERIALIZED) | FLAG(STICKY) | FLAG(STICKY_MULTI)),
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GST_EVENT_BUFFERSIZE = GST_EVENT_MAKE_TYPE (90, FLAG(DOWNSTREAM) | FLAG(SERIALIZED) | FLAG(STICKY)),
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GST_EVENT_SINK_MESSAGE = GST_EVENT_MAKE_TYPE (100, FLAG(DOWNSTREAM) | FLAG(SERIALIZED) | FLAG(STICKY) | FLAG(STICKY_MULTI)),
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GST_EVENT_STREAM_GROUP_DONE = GST_EVENT_MAKE_TYPE (105, FLAG(DOWNSTREAM) | FLAG(SERIALIZED) | FLAG(STICKY)),
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GST_EVENT_EOS = GST_EVENT_MAKE_TYPE (110, FLAG(DOWNSTREAM) | FLAG(SERIALIZED) | FLAG(STICKY)),
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GST_EVENT_TOC = GST_EVENT_MAKE_TYPE (120, FLAG(DOWNSTREAM) | FLAG(SERIALIZED) | FLAG(STICKY) | FLAG(STICKY_MULTI)),
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GST_EVENT_PROTECTION = GST_EVENT_MAKE_TYPE (130, FLAG (DOWNSTREAM) | FLAG (SERIALIZED) | FLAG (STICKY) | FLAG (STICKY_MULTI)),
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/* non-sticky downstream serialized */
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GST_EVENT_SEGMENT_DONE = GST_EVENT_MAKE_TYPE (150, FLAG(DOWNSTREAM) | FLAG(SERIALIZED)),
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GST_EVENT_GAP = GST_EVENT_MAKE_TYPE (160, FLAG(DOWNSTREAM) | FLAG(SERIALIZED)),
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/* upstream events */
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GST_EVENT_QOS = GST_EVENT_MAKE_TYPE (190, FLAG(UPSTREAM)),
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GST_EVENT_SEEK = GST_EVENT_MAKE_TYPE (200, FLAG(UPSTREAM)),
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GST_EVENT_NAVIGATION = GST_EVENT_MAKE_TYPE (210, FLAG(UPSTREAM)),
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GST_EVENT_LATENCY = GST_EVENT_MAKE_TYPE (220, FLAG(UPSTREAM)),
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GST_EVENT_STEP = GST_EVENT_MAKE_TYPE (230, FLAG(UPSTREAM)),
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GST_EVENT_RECONFIGURE = GST_EVENT_MAKE_TYPE (240, FLAG(UPSTREAM)),
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GST_EVENT_TOC_SELECT = GST_EVENT_MAKE_TYPE (250, FLAG(UPSTREAM)),
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GST_EVENT_SELECT_STREAMS = GST_EVENT_MAKE_TYPE (260, FLAG(UPSTREAM)),
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/* custom events start here */
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GST_EVENT_CUSTOM_UPSTREAM = GST_EVENT_MAKE_TYPE (270, FLAG(UPSTREAM)),
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GST_EVENT_CUSTOM_DOWNSTREAM = GST_EVENT_MAKE_TYPE (280, FLAG(DOWNSTREAM) | FLAG(SERIALIZED)),
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GST_EVENT_CUSTOM_DOWNSTREAM_OOB = GST_EVENT_MAKE_TYPE (290, FLAG(DOWNSTREAM)),
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GST_EVENT_CUSTOM_DOWNSTREAM_STICKY = GST_EVENT_MAKE_TYPE (300, FLAG(DOWNSTREAM) | FLAG(SERIALIZED) | FLAG(STICKY) | FLAG(STICKY_MULTI)),
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GST_EVENT_CUSTOM_BOTH = GST_EVENT_MAKE_TYPE (310, FLAG(BOTH) | FLAG(SERIALIZED)),
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GST_EVENT_CUSTOM_BOTH_OOB = GST_EVENT_MAKE_TYPE (320, FLAG(BOTH))
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} GstEventType;
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#undef FLAG
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/**
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* GstStreamFlags:
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* @GST_STREAM_FLAG_NONE: This stream has no special attributes
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* @GST_STREAM_FLAG_SPARSE: This stream is a sparse stream (e.g. a subtitle
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* stream), data may flow only in irregular intervals with large gaps in
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* between.
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* @GST_STREAM_FLAG_SELECT: This stream should be selected by default. This
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* flag may be used by demuxers to signal that a stream should be selected
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* by default in a playback scenario.
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* @GST_STREAM_FLAG_UNSELECT: This stream should not be selected by default.
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* This flag may be used by demuxers to signal that a stream should not
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* be selected by default in a playback scenario, but only if explicitly
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* selected by the user (e.g. an audio track for the hard of hearing or
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* a director's commentary track).
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*
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* Since: 1.2
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*/
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typedef enum {
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GST_STREAM_FLAG_NONE,
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GST_STREAM_FLAG_SPARSE = (1 << 0),
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GST_STREAM_FLAG_SELECT = (1 << 1),
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GST_STREAM_FLAG_UNSELECT = (1 << 2)
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} GstStreamFlags;
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#include <gst/gstminiobject.h>
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#include <gst/gstformat.h>
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#include <gst/gstobject.h>
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#include <gst/gstclock.h>
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#include <gst/gststructure.h>
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#include <gst/gsttaglist.h>
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#include <gst/gstsegment.h>
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#include <gst/gstmessage.h>
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#include <gst/gstcontext.h>
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#include <gst/gststreams.h>
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#include <gst/gsttoc.h>
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#include <gst/gststreamcollection.h>
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G_BEGIN_DECLS
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GST_API GType _gst_event_type;
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#define GST_TYPE_EVENT (_gst_event_type)
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#define GST_IS_EVENT(obj) (GST_IS_MINI_OBJECT_TYPE (obj, GST_TYPE_EVENT))
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#define GST_EVENT_CAST(obj) ((GstEvent *)(obj))
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#define GST_EVENT(obj) (GST_EVENT_CAST(obj))
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/**
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* GST_EVENT_TYPE:
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* @event: the event to query
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*
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* Get the #GstEventType of the event.
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*/
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#define GST_EVENT_TYPE(event) (GST_EVENT_CAST(event)->type)
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/**
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* GST_EVENT_TYPE_NAME:
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* @event: the event to query
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*
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* Get a constant string representation of the #GstEventType of the event.
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*/
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#define GST_EVENT_TYPE_NAME(event) (gst_event_type_get_name(GST_EVENT_TYPE(event)))
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/**
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* GST_EVENT_TIMESTAMP:
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* @event: the event to query
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*
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* Get the #GstClockTime timestamp of the event. This is the time when the event
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* was created.
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*/
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/* FIXME 2.0: Remove the GstEvent::timestamp field */
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#define GST_EVENT_TIMESTAMP(event) (GST_EVENT_CAST(event)->timestamp)
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/**
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* GST_EVENT_SEQNUM:
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* @event: the event to query
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*
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* The sequence number of @event.
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*/
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#define GST_EVENT_SEQNUM(event) (GST_EVENT_CAST(event)->seqnum)
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/**
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* GST_EVENT_IS_UPSTREAM:
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* @ev: the event to query
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*
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* Check if an event can travel upstream.
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*/
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#define GST_EVENT_IS_UPSTREAM(ev) !!(GST_EVENT_TYPE (ev) & GST_EVENT_TYPE_UPSTREAM)
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/**
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* GST_EVENT_IS_DOWNSTREAM:
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* @ev: the event to query
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*
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* Check if an event can travel downstream.
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*/
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#define GST_EVENT_IS_DOWNSTREAM(ev) !!(GST_EVENT_TYPE (ev) & GST_EVENT_TYPE_DOWNSTREAM)
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/**
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* GST_EVENT_IS_SERIALIZED:
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* @ev: the event to query
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*
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* Check if an event is serialized with the data stream.
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*/
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#define GST_EVENT_IS_SERIALIZED(ev) !!(GST_EVENT_TYPE (ev) & GST_EVENT_TYPE_SERIALIZED)
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/**
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* GST_EVENT_IS_STICKY:
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* @ev: the event to query
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*
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* Check if an event is sticky on the pads.
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*/
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#define GST_EVENT_IS_STICKY(ev) !!(GST_EVENT_TYPE (ev) & GST_EVENT_TYPE_STICKY)
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/**
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* gst_event_is_writable:
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* @ev: a #GstEvent
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*
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* Tests if you can safely write data into a event's structure or validly
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* modify the seqnum and timestamp field.
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*/
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#define gst_event_is_writable(ev) gst_mini_object_is_writable (GST_MINI_OBJECT_CAST (ev))
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/**
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* gst_event_make_writable:
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* @ev: (transfer full): a #GstEvent
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*
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* Makes a writable event from the given event. If the source event is
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* already writable, this will simply return the same event. A copy will
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* otherwise be made using gst_event_copy().
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*
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* Returns: (transfer full): a writable event which may or may not be the
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* same as @ev
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*/
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#define gst_event_make_writable(ev) GST_EVENT_CAST (gst_mini_object_make_writable (GST_MINI_OBJECT_CAST (ev)))
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/**
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* gst_event_replace: (skip)
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* @old_event: (inout) (transfer full) (nullable): pointer to a
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* pointer to a #GstEvent to be replaced.
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* @new_event: (allow-none) (transfer none): pointer to a #GstEvent that will
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* replace the event pointed to by @old_event.
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*
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* Modifies a pointer to a #GstEvent to point to a different #GstEvent. The
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* modification is done atomically (so this is useful for ensuring thread safety
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* in some cases), and the reference counts are updated appropriately (the old
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* event is unreffed, the new one is reffed).
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*
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* Either @new_event or the #GstEvent pointed to by @old_event may be %NULL.
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*
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* Returns: %TRUE if @new_event was different from @old_event
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*/
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static inline gboolean gst_event_replace(GstEvent** old_event, GstEvent* new_event);
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static inline gboolean
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gst_event_replace(GstEvent** old_event, GstEvent* new_event)
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{
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return gst_mini_object_replace ((GstMiniObject **) old_event, (GstMiniObject *) new_event);
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}
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/**
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* gst_event_steal: (skip)
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* @old_event: (inout) (transfer full) (nullable): pointer to a
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* pointer to a #GstEvent to be stolen.
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*
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* Atomically replace the #GstEvent pointed to by @old_event with %NULL and
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* return the original event.
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*
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* Returns: the #GstEvent that was in @old_event
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*/
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static inline GstEvent* gst_event_steal(GstEvent** old_event);
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static inline GstEvent *
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gst_event_steal (GstEvent **old_event)
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{
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return GST_EVENT_CAST (gst_mini_object_steal ((GstMiniObject **) old_event));
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}
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/**
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* gst_event_take: (skip)
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* @old_event: (inout) (transfer full) (nullable): pointer to a
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* pointer to a #GstEvent to be stolen.
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* @new_event: (allow-none) (transfer full): pointer to a #GstEvent that will
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* replace the event pointed to by @old_event.
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*
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* Modifies a pointer to a #GstEvent to point to a different #GstEvent. This
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* function is similar to gst_event_replace() except that it takes ownership of
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* @new_event.
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*
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* Either @new_event or the #GstEvent pointed to by @old_event may be %NULL.
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*
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* Returns: %TRUE if @new_event was different from @old_event
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*/
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static inline gboolean gst_event_take(GstEvent** old_event, GstEvent* new_event);
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static inline gboolean
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gst_event_take (GstEvent **old_event, GstEvent *new_event)
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{
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return gst_mini_object_take ((GstMiniObject **) old_event, (GstMiniObject *) new_event);
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}
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/**
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* GstQOSType:
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* @GST_QOS_TYPE_OVERFLOW: The QoS event type that is produced when upstream
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* elements are producing data too quickly and the element can't keep up
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* processing the data. Upstream should reduce their production rate. This
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* type is also used when buffers arrive early or in time.
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* @GST_QOS_TYPE_UNDERFLOW: The QoS event type that is produced when upstream
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* elements are producing data too slowly and need to speed up their
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* production rate.
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* @GST_QOS_TYPE_THROTTLE: The QoS event type that is produced when the
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* application enabled throttling to limit the data rate.
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*
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* The different types of QoS events that can be given to the
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* gst_event_new_qos() method.
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*/
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typedef enum {
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GST_QOS_TYPE_OVERFLOW = 0,
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GST_QOS_TYPE_UNDERFLOW = 1,
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GST_QOS_TYPE_THROTTLE = 2
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} GstQOSType;
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/**
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* GstEvent:
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* @mini_object: the parent structure
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* @type: the #GstEventType of the event
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* @timestamp: the timestamp of the event
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* @seqnum: the sequence number of the event
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*
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* A #GstEvent.
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*/
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struct _GstEvent {
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GstMiniObject mini_object;
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/*< public >*/ /* with COW */
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GstEventType type;
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/* FIXME 2.0: Remove the GstEvent::timestamp field */
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guint64 timestamp;
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guint32 seqnum;
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};
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GST_API
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const gchar* gst_event_type_get_name (GstEventType type);
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GST_API
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GQuark gst_event_type_to_quark (GstEventType type);
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GST_API
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GstEventTypeFlags
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gst_event_type_get_flags (GstEventType type);
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/* refcounting */
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/**
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* gst_event_ref: (skip)
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* @event: The event to refcount
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*
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* Increase the refcount of this event.
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*
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* Returns: (transfer full): @event (for convenience when doing assignments)
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*/
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static inline GstEvent* gst_event_ref(GstEvent* event);
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static inline GstEvent *
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gst_event_ref (GstEvent * event)
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{
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return (GstEvent *) gst_mini_object_ref (GST_MINI_OBJECT_CAST (event));
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}
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/**
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* gst_event_unref: (skip)
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* @event: (transfer full): the event to refcount
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*
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* Decrease the refcount of an event, freeing it if the refcount reaches 0.
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*/
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static inline void gst_event_unref(GstEvent* event);
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static inline void
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gst_event_unref (GstEvent * event)
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{
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gst_mini_object_unref (GST_MINI_OBJECT_CAST (event));
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}
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/**
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* gst_clear_event: (skip)
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* @event_ptr: a pointer to a #GstEvent reference
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*
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* Clears a reference to a #GstEvent.
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*
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* @event_ptr must not be %NULL.
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*
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* If the reference is %NULL then this function does nothing. Otherwise, the
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* reference count of the event is decreased and the pointer is set to %NULL.
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*
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* Since: 1.16
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*/
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static inline void
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gst_clear_event (GstEvent ** event_ptr)
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{
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gst_clear_mini_object ((GstMiniObject **) event_ptr);
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}
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/* copy event */
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/**
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* gst_event_copy: (skip)
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* @event: The event to copy
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*
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* Copy the event using the event specific copy function.
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*
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* Returns: (transfer full): the new event
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*/
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static inline GstEvent* gst_event_copy(const GstEvent* event);
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static inline GstEvent *
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gst_event_copy (const GstEvent * event)
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{
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return GST_EVENT_CAST (gst_mini_object_copy (GST_MINI_OBJECT_CONST_CAST (event)));
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}
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GST_API
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GType gst_event_get_type (void);
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/* custom event */
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GST_API
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GstEvent* gst_event_new_custom (GstEventType type, GstStructure *structure) G_GNUC_MALLOC;
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GST_API
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const GstStructure *
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gst_event_get_structure (GstEvent *event);
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GST_API
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GstStructure * gst_event_writable_structure (GstEvent *event);
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GST_API
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gboolean gst_event_has_name (GstEvent *event, const gchar *name);
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/* identifiers for events and messages */
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GST_API
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guint32 gst_event_get_seqnum (GstEvent *event);
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GST_API
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void gst_event_set_seqnum (GstEvent *event, guint32 seqnum);
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/* accumulated pad offsets for the event */
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GST_API
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gint64 gst_event_get_running_time_offset (GstEvent *event);
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GST_API
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void gst_event_set_running_time_offset (GstEvent *event, gint64 offset);
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/* Stream start event */
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GST_API
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GstEvent * gst_event_new_stream_start (const gchar *stream_id) G_GNUC_MALLOC;
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GST_API
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void gst_event_parse_stream_start (GstEvent *event, const gchar **stream_id);
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GST_API
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void gst_event_set_stream (GstEvent *event, GstStream *stream);
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GST_API
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void gst_event_parse_stream (GstEvent *event, GstStream **stream);
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GST_API
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void gst_event_set_stream_flags (GstEvent *event, GstStreamFlags flags);
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GST_API
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void gst_event_parse_stream_flags (GstEvent *event, GstStreamFlags *flags);
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GST_API
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void gst_event_set_group_id (GstEvent *event, guint group_id);
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GST_API
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gboolean gst_event_parse_group_id (GstEvent *event, guint *group_id);
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/* flush events */
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GST_API
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GstEvent * gst_event_new_flush_start (void) G_GNUC_MALLOC;
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GST_API
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GstEvent * gst_event_new_flush_stop (gboolean reset_time) G_GNUC_MALLOC;
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GST_API
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void gst_event_parse_flush_stop (GstEvent *event, gboolean *reset_time);
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/* Stream collection event */
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GST_API
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GstEvent * gst_event_new_stream_collection (GstStreamCollection *collection) G_GNUC_MALLOC;
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GST_API
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void gst_event_parse_stream_collection (GstEvent *event, GstStreamCollection **collection);
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/* select streams event */
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GST_API
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GstEvent * gst_event_new_select_streams (GList *streams);
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GST_API
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void gst_event_parse_select_streams (GstEvent *event, GList **streams);
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/* stream-group-done event */
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GST_API
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GstEvent * gst_event_new_stream_group_done (guint group_id) G_GNUC_MALLOC;
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GST_API
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void gst_event_parse_stream_group_done (GstEvent *event, guint *group_id);
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/* EOS event */
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GST_API
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GstEvent * gst_event_new_eos (void) G_GNUC_MALLOC;
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/* GAP event */
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GST_API
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GstEvent * gst_event_new_gap (GstClockTime timestamp,
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GstClockTime duration) G_GNUC_MALLOC;
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GST_API
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void gst_event_parse_gap (GstEvent * event,
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GstClockTime * timestamp,
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GstClockTime * duration);
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/* Caps events */
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GST_API
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GstEvent * gst_event_new_caps (GstCaps *caps) G_GNUC_MALLOC;
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GST_API
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void gst_event_parse_caps (GstEvent *event, GstCaps **caps);
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/* segment event */
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GST_API
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GstEvent* gst_event_new_segment (const GstSegment *segment) G_GNUC_MALLOC;
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GST_API
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void gst_event_parse_segment (GstEvent *event, const GstSegment **segment);
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GST_API
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void gst_event_copy_segment (GstEvent *event, GstSegment *segment);
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/* tag event */
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GST_API
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GstEvent* gst_event_new_tag (GstTagList *taglist) G_GNUC_MALLOC;
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GST_API
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void gst_event_parse_tag (GstEvent *event, GstTagList **taglist);
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/* TOC event */
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GST_API
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GstEvent* gst_event_new_toc (GstToc *toc, gboolean updated);
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GST_API
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void gst_event_parse_toc (GstEvent *event, GstToc **toc, gboolean *updated);
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/* Protection event */
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GST_API
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GstEvent * gst_event_new_protection (const gchar * system_id, GstBuffer * data, const gchar * origin);
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GST_API
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void gst_event_parse_protection (GstEvent * event, const gchar ** system_id,
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GstBuffer ** data, const gchar ** origin);
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/* buffer */
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GST_API
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GstEvent * gst_event_new_buffer_size (GstFormat format, gint64 minsize, gint64 maxsize,
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gboolean async) G_GNUC_MALLOC;
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GST_API
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void gst_event_parse_buffer_size (GstEvent *event, GstFormat *format, gint64 *minsize,
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gint64 *maxsize, gboolean *async);
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/* sink message */
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GST_API
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GstEvent* gst_event_new_sink_message (const gchar *name, GstMessage *msg) G_GNUC_MALLOC;
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GST_API
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void gst_event_parse_sink_message (GstEvent *event, GstMessage **msg);
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/* QOS events */
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GST_API
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GstEvent* gst_event_new_qos (GstQOSType type, gdouble proportion,
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GstClockTimeDiff diff, GstClockTime timestamp) G_GNUC_MALLOC;
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GST_API
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void gst_event_parse_qos (GstEvent *event, GstQOSType *type,
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gdouble *proportion, GstClockTimeDiff *diff,
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GstClockTime *timestamp);
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/* seek event */
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GST_API
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GstEvent* gst_event_new_seek (gdouble rate, GstFormat format, GstSeekFlags flags,
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GstSeekType start_type, gint64 start,
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GstSeekType stop_type, gint64 stop) G_GNUC_MALLOC;
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GST_API
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void gst_event_parse_seek (GstEvent *event, gdouble *rate, GstFormat *format,
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GstSeekFlags *flags,
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GstSeekType *start_type, gint64 *start,
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GstSeekType *stop_type, gint64 *stop);
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GST_API
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void gst_event_set_seek_trickmode_interval (GstEvent *event, GstClockTime interval);
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GST_API
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void gst_event_parse_seek_trickmode_interval (GstEvent *event, GstClockTime *interval);
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/* navigation event */
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GST_API
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GstEvent* gst_event_new_navigation (GstStructure *structure) G_GNUC_MALLOC;
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/* latency event */
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GST_API
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GstEvent* gst_event_new_latency (GstClockTime latency) G_GNUC_MALLOC;
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GST_API
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void gst_event_parse_latency (GstEvent *event, GstClockTime *latency);
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/* step event */
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GST_API
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GstEvent* gst_event_new_step (GstFormat format, guint64 amount, gdouble rate,
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gboolean flush, gboolean intermediate) G_GNUC_MALLOC;
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GST_API
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void gst_event_parse_step (GstEvent *event, GstFormat *format, guint64 *amount,
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gdouble *rate, gboolean *flush, gboolean *intermediate);
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/* renegotiate event */
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GST_API
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GstEvent* gst_event_new_reconfigure (void) G_GNUC_MALLOC;
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/* TOC select event */
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GST_API
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GstEvent* gst_event_new_toc_select (const gchar *uid) G_GNUC_MALLOC;
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GST_API
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void gst_event_parse_toc_select (GstEvent *event, gchar **uid);
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/* segment-done event */
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GST_API
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GstEvent* gst_event_new_segment_done (GstFormat format, gint64 position) G_GNUC_MALLOC;
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GST_API
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void gst_event_parse_segment_done (GstEvent *event, GstFormat *format, gint64 *position);
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G_DEFINE_AUTOPTR_CLEANUP_FUNC(GstEvent, gst_event_unref)
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G_END_DECLS
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#endif /* __GST_EVENT_H__ */
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