mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-06-15 20:40:39 +00:00
4e121ae147
Original commit message from CVS: * gst/gst_private.h: * gst/gstbuffer.h: * gst/gstevent.h: * gst/gstformat.h: * gst/gstmessage.h: * gst/gstplugin.h: * gst/gstquery.h: * gst/gsttaglist.h: * gst/gstvalue.h: Move declaration of private _gst_foo_initialize() functions into our private header file where they should have been all along.
431 lines
15 KiB
C
431 lines
15 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., 59 Temple Place - Suite 330,
|
|
* Boston, MA 02111-1307, USA.
|
|
*/
|
|
|
|
|
|
#ifndef __GST_EVENT_H__
|
|
#define __GST_EVENT_H__
|
|
|
|
#include <gst/gstminiobject.h>
|
|
#include <gst/gstformat.h>
|
|
#include <gst/gstobject.h>
|
|
#include <gst/gstclock.h>
|
|
#include <gst/gststructure.h>
|
|
#include <gst/gsttaglist.h>
|
|
|
|
G_BEGIN_DECLS
|
|
|
|
/**
|
|
* 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.
|
|
*
|
|
* #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
|
|
} GstEventTypeFlags;
|
|
|
|
/**
|
|
* GST_EVENT_TYPE_BOTH:
|
|
*
|
|
* The same thing as #GST_EVENT_TYPE_UPSTREAM | #GST_EVENT_TYPE_DOWNSTREAM.
|
|
*/
|
|
#define GST_EVENT_TYPE_BOTH \
|
|
(GST_EVENT_TYPE_UPSTREAM | GST_EVENT_TYPE_DOWNSTREAM)
|
|
|
|
#define GST_EVENT_TYPE_SHIFT 4
|
|
|
|
/**
|
|
* 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_TYPE_SHIFT) | (flags))
|
|
|
|
#define FLAG(name) GST_EVENT_TYPE_##name
|
|
|
|
/**
|
|
* GstEventType:
|
|
* @GST_EVENT_UNKNOWN: unknown event.
|
|
* @GST_EVENT_FLUSH_START: Start a flush operation
|
|
* @GST_EVENT_FLUSH_STOP: Stop a flush operation
|
|
* @GST_EVENT_EOS: End-Of-Stream. No more data is to be expected to follow
|
|
* without a NEWSEGMENT event.
|
|
* @GST_EVENT_NEWSEGMENT: A new media segment follows in the dataflow.
|
|
* @GST_EVENT_TAG: A new set of metadata tags has been found in the stream.
|
|
* @GST_EVENT_BUFFERSIZE: Notification of buffering requirements
|
|
* @GST_EVENT_QOS: A quality message. Used to indicate to upstream elements
|
|
* that the downstream elements are being starved of or
|
|
* flooded with data.
|
|
* @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. Since: 0.10.12
|
|
* @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_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 (1, FLAG(BOTH)),
|
|
GST_EVENT_FLUSH_STOP = GST_EVENT_MAKE_TYPE (2, FLAG(BOTH) | FLAG(SERIALIZED)),
|
|
/* downstream serialized events */
|
|
GST_EVENT_EOS = GST_EVENT_MAKE_TYPE (5, FLAG(DOWNSTREAM) | FLAG(SERIALIZED)),
|
|
GST_EVENT_NEWSEGMENT = GST_EVENT_MAKE_TYPE (6, FLAG(DOWNSTREAM) | FLAG(SERIALIZED)),
|
|
GST_EVENT_TAG = GST_EVENT_MAKE_TYPE (7, FLAG(DOWNSTREAM) | FLAG(SERIALIZED)),
|
|
GST_EVENT_BUFFERSIZE = GST_EVENT_MAKE_TYPE (8, FLAG(DOWNSTREAM) | FLAG(SERIALIZED)),
|
|
/* upstream events */
|
|
GST_EVENT_QOS = GST_EVENT_MAKE_TYPE (15, FLAG(UPSTREAM)),
|
|
GST_EVENT_SEEK = GST_EVENT_MAKE_TYPE (16, FLAG(UPSTREAM)),
|
|
GST_EVENT_NAVIGATION = GST_EVENT_MAKE_TYPE (17, FLAG(UPSTREAM)),
|
|
GST_EVENT_LATENCY = GST_EVENT_MAKE_TYPE (18, FLAG(UPSTREAM)),
|
|
|
|
/* custom events start here */
|
|
GST_EVENT_CUSTOM_UPSTREAM = GST_EVENT_MAKE_TYPE (32, FLAG(UPSTREAM)),
|
|
GST_EVENT_CUSTOM_DOWNSTREAM = GST_EVENT_MAKE_TYPE (32, FLAG(DOWNSTREAM) | FLAG(SERIALIZED)),
|
|
GST_EVENT_CUSTOM_DOWNSTREAM_OOB = GST_EVENT_MAKE_TYPE (32, FLAG(DOWNSTREAM)),
|
|
GST_EVENT_CUSTOM_BOTH = GST_EVENT_MAKE_TYPE (32, FLAG(BOTH) | FLAG(SERIALIZED)),
|
|
GST_EVENT_CUSTOM_BOTH_OOB = GST_EVENT_MAKE_TYPE (32, FLAG(BOTH))
|
|
} GstEventType;
|
|
#undef FLAG
|
|
|
|
/**
|
|
* GST_EVENT_TRACE_NAME:
|
|
*
|
|
* The name used for memory allocation tracing
|
|
*/
|
|
#define GST_EVENT_TRACE_NAME "GstEvent"
|
|
|
|
typedef struct _GstEvent GstEvent;
|
|
typedef struct _GstEventClass GstEventClass;
|
|
|
|
#define GST_TYPE_EVENT (gst_event_get_type())
|
|
#define GST_IS_EVENT(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_EVENT))
|
|
#define GST_IS_EVENT_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_EVENT))
|
|
#define GST_EVENT_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GST_TYPE_EVENT, GstEventClass))
|
|
#define GST_EVENT(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_EVENT, GstEvent))
|
|
#define GST_EVENT_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_EVENT, GstEventClass))
|
|
#define GST_EVENT_CAST(obj) ((GstEvent *)(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.
|
|
*/
|
|
#define GST_EVENT_TIMESTAMP(event) (GST_EVENT_CAST(event)->timestamp)
|
|
|
|
/**
|
|
* GST_EVENT_SRC:
|
|
* @event: the event to query
|
|
*
|
|
* The source #GstObject that generated this event.
|
|
*/
|
|
#define GST_EVENT_SRC(event) (GST_EVENT_CAST(event)->src)
|
|
|
|
/**
|
|
* 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_replace:
|
|
* @old_event: pointer to a pointer to a #GstEvent to be replaced.
|
|
* @new_event: 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.
|
|
*
|
|
* Since: 0.10.3
|
|
*/
|
|
#define gst_event_replace(old_event,new_event) \
|
|
gst_mini_object_replace ((GstMiniObject **)(old_event), GST_MINI_OBJECT (new_event))
|
|
|
|
/**
|
|
* GstSeekType:
|
|
* @GST_SEEK_TYPE_NONE: no change in position is required
|
|
* @GST_SEEK_TYPE_CUR: change relative to current position
|
|
* @GST_SEEK_TYPE_SET: absolute position is requested
|
|
* @GST_SEEK_TYPE_END: relative position to duration is requested
|
|
*
|
|
* The different types of seek events. When constructing a seek event with
|
|
* gst_event_new_seek(), a format, a seek method and optional flags are to
|
|
* be provided. The seek event is then inserted into the graph with
|
|
* gst_pad_send_event() or gst_element_send_event().
|
|
*/
|
|
typedef enum {
|
|
/* one of these */
|
|
GST_SEEK_TYPE_NONE = 0,
|
|
GST_SEEK_TYPE_CUR = 1,
|
|
GST_SEEK_TYPE_SET = 2,
|
|
GST_SEEK_TYPE_END = 3
|
|
} GstSeekType;
|
|
|
|
/**
|
|
* GstSeekFlags:
|
|
* @GST_SEEK_FLAG_NONE: no flag
|
|
* @GST_SEEK_FLAG_FLUSH: flush pipeline
|
|
* @GST_SEEK_FLAG_ACCURATE: accurate position is requested, this might
|
|
* be considerably slower for some formats.
|
|
* @GST_SEEK_FLAG_KEY_UNIT: seek to the nearest keyframe. This might be
|
|
* faster but less accurate.
|
|
* @GST_SEEK_FLAG_SEGMENT: perform a segment seek.
|
|
*
|
|
* Flags to be used with gst_element_seek() or gst_event_new_seek(). All flags
|
|
* can be used together.
|
|
*
|
|
* A non flushing seek might take some time to perform as the currently
|
|
* playing data in the pipeline will not be cleared.
|
|
*
|
|
* An accurate seek might be slower for formats that don't have any indexes
|
|
* or timestamp markers in the stream. Specifying this flag might require a
|
|
* complete scan of the file in those cases.
|
|
*
|
|
* When performing a segment seek: after the playback of the segment completes,
|
|
* no EOS will be emmited by the element that performed the seek, but a
|
|
* #GST_MESSAGE_SEGMENT_DONE message will be posted on the bus by the element.
|
|
* When this message is posted, it is possible to send a new seek event to
|
|
* continue playback. With this seek method it is possible to perform seemless
|
|
* looping or simple linear editing.
|
|
*/
|
|
typedef enum {
|
|
GST_SEEK_FLAG_NONE = 0,
|
|
GST_SEEK_FLAG_FLUSH = (1 << 0),
|
|
GST_SEEK_FLAG_ACCURATE = (1 << 1),
|
|
GST_SEEK_FLAG_KEY_UNIT = (1 << 2),
|
|
GST_SEEK_FLAG_SEGMENT = (1 << 3)
|
|
} GstSeekFlags;
|
|
|
|
|
|
/**
|
|
* GstEvent:
|
|
* @mini_object: the parent structure
|
|
* @type: the #GstEventType of the event
|
|
* @timestamp: the timestamp of the event
|
|
* @src: the src of the event
|
|
* @structure: the #GstStructure containing the event info.
|
|
*
|
|
* A #GstEvent.
|
|
*/
|
|
struct _GstEvent {
|
|
GstMiniObject mini_object;
|
|
|
|
/*< public >*/ /* with COW */
|
|
GstEventType type;
|
|
guint64 timestamp;
|
|
GstObject *src;
|
|
|
|
GstStructure *structure;
|
|
|
|
/*< private >*/
|
|
gpointer _gst_reserved;
|
|
};
|
|
|
|
struct _GstEventClass {
|
|
GstMiniObjectClass mini_object_class;
|
|
|
|
/*< private >*/
|
|
gpointer _gst_reserved[GST_PADDING];
|
|
};
|
|
|
|
const gchar* gst_event_type_get_name (GstEventType type);
|
|
GQuark gst_event_type_to_quark (GstEventType type);
|
|
GstEventTypeFlags
|
|
gst_event_type_get_flags (GstEventType type);
|
|
|
|
|
|
GType gst_event_get_type (void);
|
|
|
|
/* refcounting */
|
|
/**
|
|
* gst_event_ref:
|
|
* @event: The event to refcount
|
|
*
|
|
* Increase the refcount of this event.
|
|
*
|
|
* Returns: @event (for convenience when doing assignments)
|
|
*/
|
|
#ifdef _FOOL_GTK_DOC_
|
|
G_INLINE_FUNC GstEvent * gst_event_ref (GstEvent * event);
|
|
#endif
|
|
|
|
static inline GstEvent *
|
|
gst_event_ref (GstEvent * ev)
|
|
{
|
|
/* not using a macro here because gcc-4.1 will complain
|
|
* if the return value isn't used (because of the cast) */
|
|
return (GstEvent *) gst_mini_object_ref (GST_MINI_OBJECT (ev));
|
|
}
|
|
|
|
/**
|
|
* gst_event_unref:
|
|
* @ev: The event to refcount
|
|
*
|
|
* Decrease the refcount of an event, freeing it if the refcount reaches 0.
|
|
*/
|
|
#define gst_event_unref(ev) gst_mini_object_unref (GST_MINI_OBJECT (ev))
|
|
|
|
/* copy event */
|
|
/**
|
|
* gst_event_copy:
|
|
* @ev: The event to copy
|
|
*
|
|
* Copy the event using the event specific copy function.
|
|
*/
|
|
#define gst_event_copy(ev) GST_EVENT_CAST (gst_mini_object_copy (GST_MINI_OBJECT (ev)))
|
|
|
|
/* custom event */
|
|
GstEvent* gst_event_new_custom (GstEventType type, GstStructure *structure);
|
|
|
|
const GstStructure *
|
|
gst_event_get_structure (GstEvent *event);
|
|
|
|
/* flush events */
|
|
GstEvent * gst_event_new_flush_start (void);
|
|
GstEvent * gst_event_new_flush_stop (void);
|
|
|
|
/* EOS event */
|
|
GstEvent * gst_event_new_eos (void);
|
|
|
|
/* newsegment events */
|
|
GstEvent* gst_event_new_new_segment (gboolean update, gdouble rate,
|
|
GstFormat format,
|
|
gint64 start, gint64 stop,
|
|
gint64 position);
|
|
GstEvent* gst_event_new_new_segment_full (gboolean update, gdouble rate,
|
|
gdouble applied_rate,
|
|
GstFormat format,
|
|
gint64 start, gint64 stop,
|
|
gint64 position);
|
|
void gst_event_parse_new_segment (GstEvent *event,
|
|
gboolean *update,
|
|
gdouble *rate,
|
|
GstFormat *format,
|
|
gint64 *start, gint64 *stop,
|
|
gint64 *position);
|
|
void gst_event_parse_new_segment_full (GstEvent *event,
|
|
gboolean *update,
|
|
gdouble *rate,
|
|
gdouble *applied_rate,
|
|
GstFormat *format,
|
|
gint64 *start, gint64 *stop,
|
|
gint64 *position);
|
|
|
|
/* tag event */
|
|
GstEvent* gst_event_new_tag (GstTagList *taglist);
|
|
void gst_event_parse_tag (GstEvent *event, GstTagList **taglist);
|
|
|
|
/* buffer */
|
|
GstEvent * gst_event_new_buffer_size (GstFormat format, gint64 minsize, gint64 maxsize,
|
|
gboolean async);
|
|
void gst_event_parse_buffer_size (GstEvent *event, GstFormat *format, gint64 *minsize,
|
|
gint64 *maxsize, gboolean *async);
|
|
|
|
/* QOS events */
|
|
GstEvent* gst_event_new_qos (gdouble proportion, GstClockTimeDiff diff,
|
|
GstClockTime timestamp);
|
|
void gst_event_parse_qos (GstEvent *event, gdouble *proportion, GstClockTimeDiff *diff,
|
|
GstClockTime *timestamp);
|
|
/* seek event */
|
|
GstEvent* gst_event_new_seek (gdouble rate, GstFormat format, GstSeekFlags flags,
|
|
GstSeekType start_type, gint64 start,
|
|
GstSeekType stop_type, gint64 stop);
|
|
void gst_event_parse_seek (GstEvent *event, gdouble *rate, GstFormat *format,
|
|
GstSeekFlags *flags,
|
|
GstSeekType *start_type, gint64 *start,
|
|
GstSeekType *stop_type, gint64 *stop);
|
|
/* navigation event */
|
|
GstEvent* gst_event_new_navigation (GstStructure *structure);
|
|
|
|
/* latency event */
|
|
GstEvent* gst_event_new_latency (GstClockTime latency);
|
|
void gst_event_parse_latency (GstEvent *event, GstClockTime *latency);
|
|
|
|
G_END_DECLS
|
|
|
|
#endif /* __GST_EVENT_H__ */
|