gstreamer/gst/gstevent.h
Wim Taymans 66d7070ef1 Some docs updates
Original commit message from CVS:
* CHANGES-0.9:
* docs/design/part-TODO.txt:
* docs/design/part-events.txt:
Some docs updates

* gst/base/gstbasesink.c: (gst_base_sink_handle_object),
(gst_base_sink_event), (gst_base_sink_do_sync),
(gst_base_sink_activate_push), (gst_base_sink_activate_pull):
* gst/base/gstbasesrc.c: (gst_base_src_send_discont),
(gst_base_src_do_seek), (gst_base_src_event_handler),
(gst_base_src_loop):
* gst/base/gstbasetransform.c: (gst_base_transform_transform_caps),
(gst_base_transform_configure_caps), (gst_base_transform_setcaps),
(gst_base_transform_get_size), (gst_base_transform_buffer_alloc),
(gst_base_transform_event), (gst_base_transform_handle_buffer),
(gst_base_transform_set_passthrough),
(gst_base_transform_is_passthrough):
* gst/elements/gstfakesink.c: (gst_fake_sink_event):
* gst/elements/gstfilesink.c: (gst_file_sink_event):
Event updates.

* gst/gstbuffer.h:
Use faster casts.

* gst/gstelement.c: (gst_element_seek):
* gst/gstelement.h:
Update gst_element_seek.

* gst/gstevent.c: (gst_event_finalize), (_gst_event_copy),
(gst_event_new), (gst_event_new_custom), (gst_event_get_structure),
(gst_event_new_flush_start), (gst_event_new_flush_stop),
(gst_event_new_eos), (gst_event_new_newsegment),
(gst_event_parse_newsegment), (gst_event_new_tag),
(gst_event_parse_tag), (gst_event_new_filler), (gst_event_new_qos),
(gst_event_parse_qos), (gst_event_new_seek),
(gst_event_parse_seek), (gst_event_new_navigation):
* gst/gstevent.h:
Make GstEvent use GstStructure. Add parsing code, make sure the
API is sufficiently generic.
Mark possible directions of events and serialization.

* gst/gstmessage.c: (gst_message_init), (gst_message_finalize),
(_gst_message_copy), (gst_message_new_segment_start),
(gst_message_new_segment_done), (gst_message_new_custom),
(gst_message_parse_segment_start),
(gst_message_parse_segment_done):
Small cleanups.

* gst/gstpad.c: (gst_pad_get_caps_unlocked), (gst_pad_accept_caps),
(gst_pad_set_caps), (gst_pad_send_event):
Update for new events.
Catch events sent in wrong directions.

* gst/gstqueue.c: (gst_queue_link_src),
(gst_queue_handle_sink_event), (gst_queue_chain), (gst_queue_loop),
(gst_queue_handle_src_query):
Event updates.

* gst/gsttag.c:
* gst/gsttag.h:
Remove event code from this file.

* libs/gst/dataprotocol/dataprotocol.c: (gst_dp_packet_from_event),
(gst_dp_event_from_packet):
Event updates.
2005-07-27 18:33:03 +00:00

211 lines
7.4 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/gsttag.h>
G_BEGIN_DECLS
/* bitmaks defining the direction */
#define GST_EVDIR_US (1 << 0)
#define GST_EVDIR_DS (1 << 1)
#define GST_EVDIR_BOTH GST_EVDIR_US | GST_EVDIR_DS
/* mask defining event is serialized with data */
#define GST_EVSER (1 << 2)
#define GST_EVSHIFT 4
/* when making custom event types, use this macro with the num and
* the given flags */
#define GST_EVENT_MAKE_TYPE(num,flags) (((num) << GST_EVSHIFT) | (flags))
/**
* 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: no more data is to be expected.
* @GST_EVENT_NEWSEGMENT: a new segment started
* @GST_EVENT_TAG: a new tag
* @GST_EVENT_FILLER: filler for sparse data streams.
* @GST_EVENT_QOS: a quality message
* @GST_EVENT_SEEK: a request for a new playback position and rate.
* @GST_EVENT_NAVIGATION: a navigation event
*/
typedef enum {
GST_EVENT_UNKNOWN = GST_EVENT_MAKE_TYPE (0, 0),
/* bidirectional events */
GST_EVENT_FLUSH_START = GST_EVENT_MAKE_TYPE (1, GST_EVDIR_BOTH),
GST_EVENT_FLUSH_STOP = GST_EVENT_MAKE_TYPE (2, GST_EVDIR_BOTH),
/* downstream serialized events */
GST_EVENT_EOS = GST_EVENT_MAKE_TYPE (3, GST_EVDIR_DS | GST_EVSER),
GST_EVENT_NEWSEGMENT = GST_EVENT_MAKE_TYPE (4, GST_EVDIR_DS | GST_EVSER),
GST_EVENT_TAG = GST_EVENT_MAKE_TYPE (5, GST_EVDIR_DS | GST_EVSER),
GST_EVENT_FILLER = GST_EVENT_MAKE_TYPE (6, GST_EVDIR_DS | GST_EVSER),
/* upstream events */
GST_EVENT_QOS = GST_EVENT_MAKE_TYPE (7, GST_EVDIR_US),
GST_EVENT_SEEK = GST_EVENT_MAKE_TYPE (8, GST_EVDIR_US),
GST_EVENT_NAVIGATION = GST_EVENT_MAKE_TYPE (9, GST_EVDIR_US),
/* custom events start here */
GST_EVENT_CUSTOM_START = 32
} GstEventType;
#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_TYPE(event) (GST_EVENT(event)->type)
#define GST_EVENT_TIMESTAMP(event) (GST_EVENT(event)->timestamp)
#define GST_EVENT_SRC(event) (GST_EVENT(event)->src)
#define GST_EVENT_IS_UPSTREAM(ev) !!(GST_EVENT_TYPE (ev) & GST_EVDIR_US)
#define GST_EVENT_IS_DOWNSTREAM(ev) !!(GST_EVENT_TYPE (ev) & GST_EVDIR_DS)
#define GST_EVENT_IS_SERIALIZED(ev) !!(GST_EVENT_TYPE (ev) & GST_EVSER)
/**
* 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
*/
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 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. After the playback
* of the segment completes, no EOS will be emmited but a
* SEGMENT_DONE message will be posted on the bus.
*/
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;
struct _GstEvent {
GstMiniObject mini_object;
/*< public >*/ /* with COW */
GstEventType type;
guint64 timestamp;
GstObject *src;
GstStructure *structure;
/*< private >*/
gpointer _gst_reserved[GST_PADDING];
};
struct _GstEventClass {
GstMiniObjectClass mini_object_class;
/*< private >*/
gpointer _gst_reserved[GST_PADDING];
};
void _gst_event_initialize (void);
GType gst_event_get_type (void);
/* refcounting */
#define gst_event_ref(ev) GST_EVENT (gst_mini_object_ref (GST_MINI_OBJECT (ev)))
#define gst_event_unref(ev) gst_mini_object_unref (GST_MINI_OBJECT (ev))
/* copy event */
#define gst_event_copy(ev) GST_EVENT (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_newsegment (gdouble rate,
GstFormat format, gint64 start_value, gint64 stop_value,
gint64 base);
void gst_event_parse_newsegment (GstEvent *event, gdouble *rate, GstFormat *format,
gint64 *start_value, gint64 *end_value, gint64 *base);
/* tag event */
GstEvent* gst_event_new_tag (GstTagList *taglist);
void gst_event_parse_tag (GstEvent *event, GstTagList **taglist);
/* filler event */
GstEvent * gst_event_new_filler (void);
/* 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 cur_type, gint64 cur,
GstSeekType stop_type, gint64 stop);
void gst_event_parse_seek (GstEvent *event, gdouble *rate, GstFormat *format,
GstSeekFlags *flags,
GstSeekType *cur_type, gint64 *cur,
GstSeekType *stop_type, gint64 *stop);
/* navigation event */
GstEvent* gst_event_new_navigation (GstStructure *structure);
G_END_DECLS
#endif /* __GST_EVENT_H__ */