2 * Copyright (C) 2004 Wim Taymans <wim@fluendo.com>
4 * gstmessage.h: Header for GstMessage subsystem
6 * This library is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Library General Public
8 * License as published by the Free Software Foundation; either
9 * version 2 of the License, or (at your option) any later version.
11 * This library is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Library General Public License for more details.
16 * You should have received a copy of the GNU Library General Public
17 * License along with this library; if not, write to the
18 * Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
19 * Boston, MA 02110-1301, USA.
22 #ifndef __GST_MESSAGE_H__
23 #define __GST_MESSAGE_H__
29 typedef struct _GstMessage GstMessage;
33 * @GST_MESSAGE_UNKNOWN: an undefined message
34 * @GST_MESSAGE_EOS: end-of-stream reached in a pipeline. The application will
35 * only receive this message in the PLAYING state and every time it sets a
36 * pipeline to PLAYING that is in the EOS state. The application can perform a
37 * flushing seek in the pipeline, which will undo the EOS state again.
38 * @GST_MESSAGE_ERROR: an error occurred. When the application receives an error
39 * message it should stop playback of the pipeline and not assume that more
40 * data will be played.
41 * @GST_MESSAGE_WARNING: a warning occurred.
42 * @GST_MESSAGE_INFO: an info message occurred
43 * @GST_MESSAGE_TAG: a tag was found.
44 * @GST_MESSAGE_BUFFERING: the pipeline is buffering. When the application
45 * receives a buffering message in the PLAYING state for a non-live pipeline it
46 * must PAUSE the pipeline until the buffering completes, when the percentage
47 * field in the message is 100%. For live pipelines, no action must be
48 * performed and the buffering percentage can be used to inform the user about
50 * @GST_MESSAGE_STATE_CHANGED: a state change happened
51 * @GST_MESSAGE_STATE_DIRTY: an element changed state in a streaming thread.
52 * This message is deprecated.
53 * @GST_MESSAGE_STEP_DONE: a stepping operation finished.
54 * @GST_MESSAGE_CLOCK_PROVIDE: an element notifies its capability of providing
55 * a clock. This message is used internally and
56 * never forwarded to the application.
57 * @GST_MESSAGE_CLOCK_LOST: The current clock as selected by the pipeline became
58 * unusable. The pipeline will select a new clock on
59 * the next PLAYING state change. The application
60 * should set the pipeline to PAUSED and back to
61 * PLAYING when this message is received.
62 * @GST_MESSAGE_NEW_CLOCK: a new clock was selected in the pipeline.
63 * @GST_MESSAGE_STRUCTURE_CHANGE: the structure of the pipeline changed. This
64 * message is used internally and never forwarded to the application.
65 * @GST_MESSAGE_STREAM_STATUS: status about a stream, emitted when it starts,
66 * stops, errors, etc..
67 * @GST_MESSAGE_APPLICATION: message posted by the application, possibly
68 * via an application-specific element.
69 * @GST_MESSAGE_ELEMENT: element-specific message, see the specific element's
71 * @GST_MESSAGE_SEGMENT_START: pipeline started playback of a segment. This
72 * message is used internally and never forwarded to the application.
73 * @GST_MESSAGE_SEGMENT_DONE: pipeline completed playback of a segment. This
74 * message is forwarded to the application after all elements that posted
75 * @GST_MESSAGE_SEGMENT_START posted a GST_MESSAGE_SEGMENT_DONE message.
76 * @GST_MESSAGE_DURATION_CHANGED: The duration of a pipeline changed. The
77 * application can get the new duration with a duration query.
78 * @GST_MESSAGE_ASYNC_START: Posted by elements when they start an ASYNC
79 * #GstStateChange. This message is not forwarded to the application but is used
81 * @GST_MESSAGE_ASYNC_DONE: Posted by elements when they complete an ASYNC
82 * #GstStateChange. The application will only receive this message from the toplevel
84 * @GST_MESSAGE_LATENCY: Posted by elements when their latency changes. The
85 * application should recalculate and distribute a new latency.
86 * @GST_MESSAGE_REQUEST_STATE: Posted by elements when they want the pipeline to
87 * change state. This message is a suggestion to the application which can
88 * decide to perform the state change on (part of) the pipeline.
89 * @GST_MESSAGE_STEP_START: A stepping operation was started.
90 * @GST_MESSAGE_QOS: A buffer was dropped or an element changed its processing
91 * strategy for Quality of Service reasons.
92 * @GST_MESSAGE_PROGRESS: A progress message.
93 * @GST_MESSAGE_TOC: A new table of contents (TOC) was found or previously found TOC
95 * @GST_MESSAGE_RESET_TIME: Message to request resetting the pipeline's
96 * running time from the pipeline. This is an internal message which
97 * applications will likely never receive.
98 * @GST_MESSAGE_STREAM_START: Message indicating start of a new stream. Useful
99 * e.g. when using playbin in gapless playback mode, to get notified when
100 * the next title actually starts playing (which will be some time after
101 * the URI for the next title has been set).
102 * @GST_MESSAGE_NEED_CONTEXT: Message indicating that an element wants a specific context (Since 1.2)
103 * @GST_MESSAGE_HAVE_CONTEXT: Message indicating that an element created a context (Since 1.2)
104 * @GST_MESSAGE_EXTENDED: Message is an extended message type (see below).
105 * These extended message IDs can't be used directly with mask-based API
106 * like gst_bus_poll() or gst_bus_timed_pop_filtered(), but you can still
107 * filter for GST_MESSAGE_EXTENDED and then check the result for the
108 * specific type. (Since 1.4)
109 * @GST_MESSAGE_DEVICE_ADDED: Message indicating a #GstDevice was added to
110 * a #GstDeviceProvider (Since 1.4)
111 * @GST_MESSAGE_DEVICE_REMOVED: Message indicating a #GstDevice was removed
112 * from a #GstDeviceProvider (Since 1.4)
113 * @GST_MESSAGE_PROPERTY_NOTIFY: Message indicating a #GObject property has
114 * changed (Since 1.10)
115 * @GST_MESSAGE_STREAM_COLLECTION: Message indicating a new #GstStreamCollection
116 * is available (Since 1.10)
117 * @GST_MESSAGE_STREAMS_SELECTED: Message indicating the active selection of
118 * #GstStreams has changed (Since 1.10)
119 * @GST_MESSAGE_REDIRECT: Message indicating to request the application to
120 * try to play the given URL(s). Useful if for example a HTTP 302/303
121 * response is received with a non-HTTP URL inside. (Since 1.10)
122 * @GST_MESSAGE_ANY: mask for all of the above messages.
124 * The different message types that are available.
126 /* NOTE: keep in sync with quark registration in gstmessage.c
127 * NOTE: keep GST_MESSAGE_ANY a valid gint to avoid compiler warnings.
129 /* FIXME: 2.0: Make it NOT flags, just a regular 1,2,3,4.. enumeration */
130 /* FIXME: For GST_MESSAGE_ANY ~0 -> 0xffffffff see
131 * https://bugzilla.gnome.org/show_bug.cgi?id=732633
135 GST_MESSAGE_UNKNOWN = 0,
136 GST_MESSAGE_EOS = (1 << 0),
137 GST_MESSAGE_ERROR = (1 << 1),
138 GST_MESSAGE_WARNING = (1 << 2),
139 GST_MESSAGE_INFO = (1 << 3),
140 GST_MESSAGE_TAG = (1 << 4),
141 GST_MESSAGE_BUFFERING = (1 << 5),
142 GST_MESSAGE_STATE_CHANGED = (1 << 6),
143 GST_MESSAGE_STATE_DIRTY = (1 << 7),
144 GST_MESSAGE_STEP_DONE = (1 << 8),
145 GST_MESSAGE_CLOCK_PROVIDE = (1 << 9),
146 GST_MESSAGE_CLOCK_LOST = (1 << 10),
147 GST_MESSAGE_NEW_CLOCK = (1 << 11),
148 GST_MESSAGE_STRUCTURE_CHANGE = (1 << 12),
149 GST_MESSAGE_STREAM_STATUS = (1 << 13),
150 GST_MESSAGE_APPLICATION = (1 << 14),
151 GST_MESSAGE_ELEMENT = (1 << 15),
152 GST_MESSAGE_SEGMENT_START = (1 << 16),
153 GST_MESSAGE_SEGMENT_DONE = (1 << 17),
154 GST_MESSAGE_DURATION_CHANGED = (1 << 18),
155 GST_MESSAGE_LATENCY = (1 << 19),
156 GST_MESSAGE_ASYNC_START = (1 << 20),
157 GST_MESSAGE_ASYNC_DONE = (1 << 21),
158 GST_MESSAGE_REQUEST_STATE = (1 << 22),
159 GST_MESSAGE_STEP_START = (1 << 23),
160 GST_MESSAGE_QOS = (1 << 24),
161 GST_MESSAGE_PROGRESS = (1 << 25),
162 GST_MESSAGE_TOC = (1 << 26),
163 GST_MESSAGE_RESET_TIME = (1 << 27),
164 GST_MESSAGE_STREAM_START = (1 << 28),
165 GST_MESSAGE_NEED_CONTEXT = (1 << 29),
166 GST_MESSAGE_HAVE_CONTEXT = (1 << 30),
167 GST_MESSAGE_EXTENDED = (gint) (1u << 31),
168 GST_MESSAGE_DEVICE_ADDED = GST_MESSAGE_EXTENDED + 1,
169 GST_MESSAGE_DEVICE_REMOVED = GST_MESSAGE_EXTENDED + 2,
170 GST_MESSAGE_PROPERTY_NOTIFY = GST_MESSAGE_EXTENDED + 3,
171 GST_MESSAGE_STREAM_COLLECTION = GST_MESSAGE_EXTENDED + 4,
172 GST_MESSAGE_STREAMS_SELECTED = GST_MESSAGE_EXTENDED + 5,
173 GST_MESSAGE_REDIRECT = GST_MESSAGE_EXTENDED + 6,
174 GST_MESSAGE_ANY = (gint) (0xffffffff)
177 #include <gst/gstminiobject.h>
178 #include <gst/gstobject.h>
179 #include <gst/gstelement.h>
180 #include <gst/gsttaglist.h>
181 #include <gst/gststructure.h>
182 #include <gst/gstquery.h>
183 #include <gst/gsttoc.h>
184 #include <gst/gstdevice.h>
185 #include <gst/gststreams.h>
186 #include <gst/gststreamcollection.h>
188 GST_EXPORT GType _gst_message_type;
190 #define GST_TYPE_MESSAGE (_gst_message_type)
191 #define GST_IS_MESSAGE(obj) (GST_IS_MINI_OBJECT_TYPE (obj, GST_TYPE_MESSAGE))
192 #define GST_MESSAGE_CAST(obj) ((GstMessage*)(obj))
193 #define GST_MESSAGE(obj) (GST_MESSAGE_CAST(obj))
195 /* the lock is used to handle the synchronous handling of messages,
196 * the emiting thread is block until the handling thread processed
197 * the message using this mutex/cond pair */
198 #define GST_MESSAGE_GET_LOCK(message) (&GST_MESSAGE_CAST(message)->lock)
199 #define GST_MESSAGE_LOCK(message) g_mutex_lock(GST_MESSAGE_GET_LOCK(message))
200 #define GST_MESSAGE_UNLOCK(message) g_mutex_unlock(GST_MESSAGE_GET_LOCK(message))
201 #define GST_MESSAGE_GET_COND(message) (&GST_MESSAGE_CAST(message)->cond)
202 #define GST_MESSAGE_WAIT(message) g_cond_wait(GST_MESSAGE_GET_COND(message),GST_MESSAGE_GET_LOCK(message))
203 #define GST_MESSAGE_SIGNAL(message) g_cond_signal(GST_MESSAGE_GET_COND(message))
207 * @message: a #GstMessage
209 * Get the #GstMessageType of @message.
211 #define GST_MESSAGE_TYPE(message) (GST_MESSAGE_CAST(message)->type)
213 * GST_MESSAGE_TYPE_IS_EXTENDED:
214 * @message: a #GstMessage
216 * Check if the message is in the extended message group
219 #define GST_MESSAGE_TYPE_IS_EXTENDED(message) (!!(GST_MESSAGE_CAST(message)->type & GST_MESSAGE_EXTENDED))
222 * GST_MESSAGE_TYPE_NAME:
223 * @message: a #GstMessage
225 * Get a constant string representation of the #GstMessageType of @message.
227 #define GST_MESSAGE_TYPE_NAME(message) gst_message_type_get_name(GST_MESSAGE_TYPE(message))
229 * GST_MESSAGE_TIMESTAMP:
230 * @message: a #GstMessage
232 * Get the timestamp of @message. This is the timestamp when the message
235 #define GST_MESSAGE_TIMESTAMP(message) (GST_MESSAGE_CAST(message)->timestamp)
238 * @message: a #GstMessage
240 * Get the object that posted @message.
242 #define GST_MESSAGE_SRC(message) (GST_MESSAGE_CAST(message)->src)
245 * GST_MESSAGE_SEQNUM:
246 * @message: a #GstMessage
248 * Get the sequence number of @message.
250 #define GST_MESSAGE_SEQNUM(message) (GST_MESSAGE_CAST(message)->seqnum)
253 * GST_MESSAGE_SRC_NAME:
254 * @message: a #GstMessage
256 * Get the name of the object that posted @message. Returns "(NULL)" if
257 * the message has no source object set.
259 #define GST_MESSAGE_SRC_NAME(message) (GST_MESSAGE_SRC(message) ? \
260 GST_OBJECT_NAME (GST_MESSAGE_SRC(message)) : "(NULL)")
263 * GstStructureChangeType:
264 * @GST_STRUCTURE_CHANGE_TYPE_PAD_LINK: Pad linking is starting or done.
265 * @GST_STRUCTURE_CHANGE_TYPE_PAD_UNLINK: Pad unlinking is starting or done.
267 * The type of a %GST_MESSAGE_STRUCTURE_CHANGE.
270 GST_STRUCTURE_CHANGE_TYPE_PAD_LINK = 0,
271 GST_STRUCTURE_CHANGE_TYPE_PAD_UNLINK = 1
272 } GstStructureChangeType;
275 * GstStreamStatusType:
276 * @GST_STREAM_STATUS_TYPE_CREATE: A new thread need to be created.
277 * @GST_STREAM_STATUS_TYPE_ENTER: a thread entered its loop function
278 * @GST_STREAM_STATUS_TYPE_LEAVE: a thread left its loop function
279 * @GST_STREAM_STATUS_TYPE_DESTROY: a thread is destroyed
280 * @GST_STREAM_STATUS_TYPE_START: a thread is started
281 * @GST_STREAM_STATUS_TYPE_PAUSE: a thread is paused
282 * @GST_STREAM_STATUS_TYPE_STOP: a thread is stopped
284 * The type of a %GST_MESSAGE_STREAM_STATUS. The stream status messages inform the
285 * application of new streaming threads and their status.
288 GST_STREAM_STATUS_TYPE_CREATE = 0,
289 GST_STREAM_STATUS_TYPE_ENTER = 1,
290 GST_STREAM_STATUS_TYPE_LEAVE = 2,
291 GST_STREAM_STATUS_TYPE_DESTROY = 3,
293 GST_STREAM_STATUS_TYPE_START = 8,
294 GST_STREAM_STATUS_TYPE_PAUSE = 9,
295 GST_STREAM_STATUS_TYPE_STOP = 10
296 } GstStreamStatusType;
300 * @GST_PROGRESS_TYPE_START: A new task started.
301 * @GST_PROGRESS_TYPE_CONTINUE: A task completed and a new one continues.
302 * @GST_PROGRESS_TYPE_COMPLETE: A task completed.
303 * @GST_PROGRESS_TYPE_CANCELED: A task was canceled.
304 * @GST_PROGRESS_TYPE_ERROR: A task caused an error. An error message is also
307 * The type of a %GST_MESSAGE_PROGRESS. The progress messages inform the
308 * application of the status of asynchronous tasks.
311 GST_PROGRESS_TYPE_START = 0,
312 GST_PROGRESS_TYPE_CONTINUE = 1,
313 GST_PROGRESS_TYPE_COMPLETE = 2,
314 GST_PROGRESS_TYPE_CANCELED = 3,
315 GST_PROGRESS_TYPE_ERROR = 4
320 * @mini_object: the parent structure
321 * @type: the #GstMessageType of the message
322 * @timestamp: the timestamp of the message
323 * @src: the src of the message
324 * @seqnum: the sequence number of the message
330 GstMiniObject mini_object;
332 /*< public > *//* with COW */
338 /*< private >*//* with MESSAGE_LOCK */
339 GMutex lock; /* lock and cond for async delivery */
343 #include <gst/gstquery.h>
346 GType gst_message_get_type (void);
349 const gchar* gst_message_type_get_name (GstMessageType type);
352 GQuark gst_message_type_to_quark (GstMessageType type);
357 * @msg: the message to ref
359 * Convenience macro to increase the reference count of the message.
361 * Returns: @msg (for convenience when doing assignments)
363 static inline GstMessage *
364 gst_message_ref (GstMessage * msg)
366 return (GstMessage *) gst_mini_object_ref (GST_MINI_OBJECT_CAST (msg));
371 * @msg: the message to unref
373 * Convenience macro to decrease the reference count of the message, possibly
377 gst_message_unref (GstMessage * msg)
379 gst_mini_object_unref (GST_MINI_OBJECT_CAST (msg));
385 * @msg: the message to copy
387 * Creates a copy of the message. Returns a copy of the message.
389 * Returns: (transfer full): a new copy of @msg.
393 static inline GstMessage *
394 gst_message_copy (const GstMessage * msg)
396 return GST_MESSAGE_CAST (gst_mini_object_copy (GST_MINI_OBJECT_CONST_CAST (msg)));
400 * gst_message_is_writable:
401 * @msg: a #GstMessage
403 * Tests if you can safely write into a message's structure or validly
404 * modify the seqnum and timestamp fields.
406 #define gst_message_is_writable(msg) gst_mini_object_is_writable (GST_MINI_OBJECT_CAST (msg))
408 * gst_message_make_writable:
409 * @msg: (transfer full): the message to make writable
411 * Checks if a message is writable. If not, a writable copy is made and
414 * Returns: (transfer full): a message (possibly a duplicate) that is writable.
418 #define gst_message_make_writable(msg) GST_MESSAGE_CAST (gst_mini_object_make_writable (GST_MINI_OBJECT_CAST (msg)))
420 * gst_message_replace:
421 * @old_message: (inout) (transfer full) (nullable): pointer to a
422 * pointer to a #GstMessage to be replaced.
423 * @new_message: (allow-none) (transfer none): pointer to a #GstMessage that will
424 * replace the message pointed to by @old_message.
426 * Modifies a pointer to a #GstMessage to point to a different #GstMessage. The
427 * modification is done atomically (so this is useful for ensuring thread safety
428 * in some cases), and the reference counts are updated appropriately (the old
429 * message is unreffed, the new one is reffed).
431 * Either @new_message or the #GstMessage pointed to by @old_message may be %NULL.
433 * Returns: %TRUE if @new_message was different from @old_message
435 static inline gboolean
436 gst_message_replace (GstMessage **old_message, GstMessage *new_message)
438 return gst_mini_object_replace ((GstMiniObject **) old_message, (GstMiniObject *) new_message);
442 /* custom messages */
445 GstMessage * gst_message_new_custom (GstMessageType type,
447 GstStructure * structure) G_GNUC_MALLOC;
450 gst_message_get_structure (GstMessage *message);
453 gboolean gst_message_has_name (GstMessage *message, const gchar *name);
455 /* identifiers for events and messages */
458 guint32 gst_message_get_seqnum (GstMessage *message);
461 void gst_message_set_seqnum (GstMessage *message, guint32 seqnum);
466 GstMessage * gst_message_new_eos (GstObject * src) G_GNUC_MALLOC;
471 GstMessage * gst_message_new_error (GstObject * src, GError * error, const gchar * debug) G_GNUC_MALLOC;
474 GstMessage * gst_message_new_error_with_details (GstObject * src, GError * error, const gchar * debug, GstStructure * details) G_GNUC_MALLOC;
477 void gst_message_parse_error (GstMessage *message, GError **gerror, gchar **debug);
480 void gst_message_parse_error_details (GstMessage *message, const GstStructure **structure);
485 GstMessage * gst_message_new_warning (GstObject * src, GError * error, const gchar * debug) G_GNUC_MALLOC;
488 GstMessage * gst_message_new_warning_with_details (GstObject * src, GError * error, const gchar * debug, GstStructure * details) G_GNUC_MALLOC;
491 void gst_message_parse_warning (GstMessage *message, GError **gerror, gchar **debug);
494 void gst_message_parse_warning_details (GstMessage *message, const GstStructure **structure);
499 GstMessage * gst_message_new_info (GstObject * src, GError * error, const gchar * debug) G_GNUC_MALLOC;
502 GstMessage * gst_message_new_info_with_details (GstObject * src, GError * error, const gchar * debug, GstStructure * details) G_GNUC_MALLOC;
505 void gst_message_parse_info (GstMessage *message, GError **gerror, gchar **debug);
508 void gst_message_parse_info_details (GstMessage *message, const GstStructure **structure);
513 GstMessage * gst_message_new_tag (GstObject * src, GstTagList * tag_list) G_GNUC_MALLOC;
516 void gst_message_parse_tag (GstMessage *message, GstTagList **tag_list);
521 GstMessage * gst_message_new_buffering (GstObject * src, gint percent) G_GNUC_MALLOC;
524 void gst_message_parse_buffering (GstMessage *message, gint *percent);
527 void gst_message_set_buffering_stats (GstMessage *message, GstBufferingMode mode,
528 gint avg_in, gint avg_out,
529 gint64 buffering_left);
531 void gst_message_parse_buffering_stats (GstMessage *message, GstBufferingMode *mode,
532 gint *avg_in, gint *avg_out,
533 gint64 *buffering_left);
538 GstMessage * gst_message_new_state_changed (GstObject * src, GstState oldstate,
539 GstState newstate, GstState pending) G_GNUC_MALLOC;
541 void gst_message_parse_state_changed (GstMessage *message, GstState *oldstate,
542 GstState *newstate, GstState *pending);
547 GstMessage * gst_message_new_state_dirty (GstObject * src) G_GNUC_MALLOC;
552 GstMessage * gst_message_new_step_done (GstObject * src, GstFormat format, guint64 amount,
553 gdouble rate, gboolean flush, gboolean intermediate,
554 guint64 duration, gboolean eos) G_GNUC_MALLOC;
556 void gst_message_parse_step_done (GstMessage * message, GstFormat *format, guint64 *amount,
557 gdouble *rate, gboolean *flush, gboolean *intermediate,
558 guint64 *duration, gboolean *eos);
562 GstMessage * gst_message_new_clock_provide (GstObject * src, GstClock *clock, gboolean ready) G_GNUC_MALLOC;
565 void gst_message_parse_clock_provide (GstMessage *message, GstClock **clock,
571 GstMessage * gst_message_new_clock_lost (GstObject * src, GstClock *clock) G_GNUC_MALLOC;
574 void gst_message_parse_clock_lost (GstMessage *message, GstClock **clock);
579 GstMessage * gst_message_new_new_clock (GstObject * src, GstClock *clock) G_GNUC_MALLOC;
582 void gst_message_parse_new_clock (GstMessage *message, GstClock **clock);
587 GstMessage * gst_message_new_application (GstObject * src, GstStructure * structure) G_GNUC_MALLOC;
592 GstMessage * gst_message_new_element (GstObject * src, GstStructure * structure) G_GNUC_MALLOC;
597 GstMessage * gst_message_new_segment_start (GstObject * src, GstFormat format, gint64 position) G_GNUC_MALLOC;
600 void gst_message_parse_segment_start (GstMessage *message, GstFormat *format,
606 GstMessage * gst_message_new_segment_done (GstObject * src, GstFormat format, gint64 position) G_GNUC_MALLOC;
609 void gst_message_parse_segment_done (GstMessage *message, GstFormat *format,
612 /* DURATION_CHANGED */
615 GstMessage * gst_message_new_duration_changed (GstObject * src) G_GNUC_MALLOC;
620 GstMessage * gst_message_new_latency (GstObject * src) G_GNUC_MALLOC;
625 GstMessage * gst_message_new_async_start (GstObject * src) G_GNUC_MALLOC;
630 GstMessage * gst_message_new_async_done (GstObject * src, GstClockTime running_time) G_GNUC_MALLOC;
633 void gst_message_parse_async_done (GstMessage *message, GstClockTime *running_time);
635 /* STRUCTURE CHANGE */
638 GstMessage * gst_message_new_structure_change (GstObject * src, GstStructureChangeType type,
639 GstElement *owner, gboolean busy) G_GNUC_MALLOC;
641 void gst_message_parse_structure_change (GstMessage *message, GstStructureChangeType *type,
642 GstElement **owner, gboolean *busy);
647 GstMessage * gst_message_new_stream_status (GstObject * src, GstStreamStatusType type,
648 GstElement *owner) G_GNUC_MALLOC;
650 void gst_message_parse_stream_status (GstMessage *message, GstStreamStatusType *type,
653 void gst_message_set_stream_status_object (GstMessage *message, const GValue *object);
656 const GValue * gst_message_get_stream_status_object (GstMessage *message);
661 GstMessage * gst_message_new_request_state (GstObject * src, GstState state) G_GNUC_MALLOC;
664 void gst_message_parse_request_state (GstMessage * message, GstState *state);
669 GstMessage * gst_message_new_step_start (GstObject * src, gboolean active, GstFormat format,
670 guint64 amount, gdouble rate, gboolean flush,
671 gboolean intermediate) G_GNUC_MALLOC;
673 void gst_message_parse_step_start (GstMessage * message, gboolean *active, GstFormat *format,
674 guint64 *amount, gdouble *rate, gboolean *flush,
675 gboolean *intermediate);
680 GstMessage * gst_message_new_qos (GstObject * src, gboolean live, guint64 running_time,
681 guint64 stream_time, guint64 timestamp, guint64 duration) G_GNUC_MALLOC;
683 void gst_message_set_qos_values (GstMessage * message, gint64 jitter, gdouble proportion,
686 void gst_message_set_qos_stats (GstMessage * message, GstFormat format, guint64 processed,
689 void gst_message_parse_qos (GstMessage * message, gboolean * live, guint64 * running_time,
690 guint64 * stream_time, guint64 * timestamp, guint64 * duration);
692 void gst_message_parse_qos_values (GstMessage * message, gint64 * jitter, gdouble * proportion,
695 void gst_message_parse_qos_stats (GstMessage * message, GstFormat * format, guint64 * processed,
700 GstMessage * gst_message_new_progress (GstObject * src, GstProgressType type, const gchar *code,
701 const gchar *text) G_GNUC_MALLOC;
703 void gst_message_parse_progress (GstMessage * message, GstProgressType * type, gchar ** code,
709 GstMessage * gst_message_new_toc (GstObject *src, GstToc *toc, gboolean updated);
712 void gst_message_parse_toc (GstMessage *message, GstToc **toc, gboolean *updated);
717 GstMessage * gst_message_new_reset_time (GstObject * src, GstClockTime running_time) G_GNUC_MALLOC;
720 void gst_message_parse_reset_time (GstMessage *message, GstClockTime *running_time);
725 GstMessage * gst_message_new_stream_start (GstObject * src) G_GNUC_MALLOC;
728 void gst_message_set_group_id (GstMessage *message, guint group_id);
731 gboolean gst_message_parse_group_id (GstMessage *message, guint *group_id);
736 GstMessage * gst_message_new_need_context (GstObject * src, const gchar * context_type) G_GNUC_MALLOC;
739 gboolean gst_message_parse_context_type (GstMessage * message, const gchar ** context_type);
744 GstMessage * gst_message_new_have_context (GstObject * src, GstContext *context) G_GNUC_MALLOC;
747 void gst_message_parse_have_context (GstMessage *message, GstContext **context);
752 GstMessage * gst_message_new_device_added (GstObject * src, GstDevice * device) G_GNUC_MALLOC;
755 void gst_message_parse_device_added (GstMessage * message, GstDevice ** device);
760 GstMessage * gst_message_new_device_removed (GstObject * src, GstDevice * device) G_GNUC_MALLOC;
763 void gst_message_parse_device_removed (GstMessage * message, GstDevice ** device);
765 /* PROPERTY_NOTIFY */
768 GstMessage * gst_message_new_property_notify (GstObject * src, const gchar * property_name, GValue * val) G_GNUC_MALLOC;
771 void gst_message_parse_property_notify (GstMessage * message, GstObject ** object, const gchar ** property_name, const GValue ** property_value);
773 /* STREAM_COLLECTION */
776 GstMessage * gst_message_new_stream_collection (GstObject * src, GstStreamCollection * collection) G_GNUC_MALLOC;
779 void gst_message_parse_stream_collection (GstMessage *message, GstStreamCollection **collection);
781 /* STREAMS_SELECTED */
784 GstMessage * gst_message_new_streams_selected (GstObject *src, GstStreamCollection *collection);
787 void gst_message_streams_selected_add (GstMessage *message, GstStream *stream);
790 void gst_message_parse_streams_selected (GstMessage * message, GstStreamCollection **collection);
793 guint gst_message_streams_selected_get_size (GstMessage * message);
796 GstStream *gst_message_streams_selected_get_stream (GstMessage *message, guint idx);
801 GstMessage * gst_message_new_redirect (GstObject * src, const gchar * location, GstTagList * tag_list, const GstStructure * entry_struct) G_GNUC_MALLOC;
804 void gst_message_add_redirect_entry (GstMessage * message, const gchar * location, GstTagList * tag_list, const GstStructure * entry_struct);
807 void gst_message_parse_redirect_entry (GstMessage * message, gsize entry_index, const gchar ** location, GstTagList ** tag_list, const GstStructure ** entry_struct);
810 gsize gst_message_get_num_redirect_entries (GstMessage * message);
812 #ifdef G_DEFINE_AUTOPTR_CLEANUP_FUNC
813 G_DEFINE_AUTOPTR_CLEANUP_FUNC(GstMessage, gst_message_unref)
818 #endif /* __GST_MESSAGE_H__ */