2 * Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
3 * 2000 Wim Taymans <wim.taymans@chello.be>
5 * gstpad.h: Header for GstPad object
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Library General Public
9 * License as published by the Free Software Foundation; either
10 * version 2 of the License, or (at your option) any later version.
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Library General Public License for more details.
17 * You should have received a copy of the GNU Library General Public
18 * License along with this library; if not, write to the
19 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20 * Boston, MA 02111-1307, USA.
27 #include <gst/gstconfig.h>
29 #include <gst/gstobject.h>
30 #include <gst/gstbuffer.h>
31 #include <gst/gstcaps.h>
32 #include <gst/gstevent.h>
33 #include <gst/gstquery.h>
34 #include <gst/gsttask.h>
38 GST_EXPORT GType _gst_pad_type;
43 #define GST_TYPE_PAD (_gst_pad_type)
44 #define GST_IS_PAD(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_PAD))
45 #define GST_IS_PAD_FAST(obj) (G_OBJECT_TYPE(obj) == GST_TYPE_PAD) /* necessary? */
46 #define GST_IS_PAD_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_PAD))
47 #define GST_PAD(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_PAD, GstPad))
48 #define GST_PAD_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_PAD, GstPadClass))
49 #define GST_PAD_CAST(obj) ((GstPad*)(obj))
51 typedef struct _GstPad GstPad;
52 typedef struct _GstPadClass GstPadClass;
56 * @GST_PAD_LINK_OK : link succeeded
57 * @GST_PAD_LINK_WRONG_HIERARCHY: pads have no common grandparent
58 * @GST_PAD_LINK_WAS_LINKED : pad was already linked
59 * @GST_PAD_LINK_WRONG_DIRECTION: pads have wrong direction
60 * @GST_PAD_LINK_NOFORMAT : pads do not have common format
61 * @GST_PAD_LINK_NOSCHED : pads cannot cooperate in scheduling
62 * @GST_PAD_LINK_REFUSED : refused for some reason
66 GST_PAD_LINK_WRONG_HIERARCHY = -1,
67 GST_PAD_LINK_WAS_LINKED = -2,
68 GST_PAD_LINK_WRONG_DIRECTION = -3,
69 GST_PAD_LINK_NOFORMAT = -4,
70 GST_PAD_LINK_NOSCHED = -5,
71 GST_PAD_LINK_REFUSED = -6,
75 * GST_PAD_LINK_FAILED:
76 * @ret: the #GstPadLinkReturn value
78 * Macro to test if the given #GstPadLinkReturn value indicates a failed
81 #define GST_PAD_LINK_FAILED(ret) ((ret) < GST_PAD_LINK_OK)
84 * GST_PAD_LINK_SUCCESSFUL:
85 * @ret: the #GstPadLinkReturn value
87 * Macro to test if the given #GstPadLinkReturn value indicates a successfull
90 #define GST_PAD_LINK_SUCCESSFUL(ret) ((ret) >= GST_PAD_LINK_OK)
94 * GST_FLOW_RESEND: Resend buffer, possibly with new caps.
95 * GST_FLOW_OK: Data passing was ok.
96 * GST_FLOW_NOT_LINKED: Pad is not linked.
97 * GST_FLOW_WRONG_STATE: Pad is in wrong state.
98 * GST_FLOW_UNEXPECTED: Did not expect anything, like after EOS.
99 * GST_FLOW_NOT_NEGOTIATED: Pad is not negotiated.
100 * GST_FLOW_ERROR: Some (fatal) error occured.
102 * The result of passing data to a linked pad.
107 /* expected failures */
108 GST_FLOW_NOT_LINKED = -1,
109 GST_FLOW_WRONG_STATE = -2,
111 GST_FLOW_UNEXPECTED = -3,
112 GST_FLOW_NOT_NEGOTIATED = -4,
114 GST_FLOW_NOT_SUPPORTED = -6
119 * @ret: a #GstFlowReturn value
121 * Macro to test if the given #GstFlowReturn value indicates a fatal
124 #define GST_FLOW_IS_FATAL(ret) ((ret) <= GST_FLOW_UNEXPECTED)
126 G_CONST_RETURN gchar* gst_flow_get_name (GstFlowReturn ret);
127 GQuark gst_flow_to_quark (GstFlowReturn ret);
135 #define GST_PAD_MODE_ACTIVATE(mode) ((mode) != GST_ACTIVATE_NONE)
138 typedef gboolean (*GstPadActivateFunction) (GstPad *pad);
139 typedef gboolean (*GstPadActivateModeFunction) (GstPad *pad, gboolean active);
144 * GstPadChainFunction:
145 * @pad: the #GstPad that performed the chain.
146 * @buffer: the #GstBuffer that is chained.
148 * A function that will be called when chaining buffers.
150 * Returns: GST_FLOW_OK for success
152 typedef GstFlowReturn (*GstPadChainFunction) (GstPad *pad, GstBuffer *buffer);
153 typedef GstFlowReturn (*GstPadGetRangeFunction) (GstPad *pad, guint64 offset,
154 guint length, GstBuffer **buffer);
157 * GstPadEventFunction:
158 * @pad: the #GstPad to handle the event.
159 * @event: the #GstEvent to handle.
161 * Function signature to handle an event for the pad.
163 * Returns: TRUE if the pad could handle the event.
165 typedef gboolean (*GstPadEventFunction) (GstPad *pad, GstEvent *event);
168 /* deprecate me, check range should use seeking query */
169 typedef gboolean (*GstPadCheckGetRangeFunction) (GstPad *pad);
174 * GstPadIntLinkFunction:
175 * @pad: The #GstPad to query.
177 * The signature of the internal pad link function.
179 * Returns: a newly allocated #GList of pads that are linked to the given pad on
180 * the inside of the parent element.
181 * The caller must call g_list_free() on it after use.
184 typedef GList* (*GstPadIntLinkFunction) (GstPad *pad);
187 /* generic query function */
189 * GstPadQueryTypeFunction:
190 * @pad: a #GstPad to query
192 * The signature of the query types function.
194 * Returns: an array of query types
196 typedef const GstQueryType* (*GstPadQueryTypeFunction) (GstPad *pad);
199 * GstPadQueryFunction:
200 * @pad: the #GstPad to query.
201 * @query: the #GstQuery object to execute
203 * The signature of the query function.
205 * Returns: TRUE if the query could be performed.
207 typedef gboolean (*GstPadQueryFunction) (GstPad *pad, GstQuery *query);
213 * @pad: the #GstPad that is linked.
214 * @peer: the peer #GstPad of the link
216 * Function signature to handle a new link on the pad.
218 * Returns: the result of the link with the specified peer.
220 typedef GstPadLinkReturn (*GstPadLinkFunction) (GstPad *pad, GstPad *peer);
222 * GstPadUnlinkFunction
223 * @pad: the #GstPad that is linked.
225 * Function signature to handle a unlinking the pad prom its peer.
227 typedef void (*GstPadUnlinkFunction) (GstPad *pad);
232 * GstPadGetCapsFunction:
233 * @pad: the #GstPad to get the capabilities of.
235 * Returns a copy of the capabilities of the specified pad. By default this
236 * function will return the pad template capabilities, but can optionally
239 * Returns: a newly allocated copy #GstCaps of the pad.
241 typedef GstCaps* (*GstPadGetCapsFunction) (GstPad *pad);
242 typedef gboolean (*GstPadSetCapsFunction) (GstPad *pad, GstCaps *caps);
243 typedef gboolean (*GstPadAcceptCapsFunction) (GstPad *pad, GstCaps *caps);
244 typedef void (*GstPadFixateCapsFunction) (GstPad *pad, GstCaps *caps);
245 typedef GstFlowReturn (*GstPadBufferAllocFunction) (GstPad *pad, guint64 offset, guint size,
246 GstCaps *caps, GstBuffer **buf);
250 * GstPadDispatcherFunction:
251 * @pad: the #GstPad that is dispatched.
252 * @data: the gpointer to optional user data.
254 * A dispatcher function is called for all internally linked pads, see
255 * gst_pad_dispatcher().
257 * Returns: TRUE if the dispatching procedure has to be stopped.
259 typedef gboolean (*GstPadDispatcherFunction) (GstPad *pad, gpointer data);
262 * GstPadBlockCallback:
263 * @pad: the #GstPad that is blockend or unblocked.
264 * @blocked: blocking state for the pad
265 * @user_data: the gpointer to optional user data.
267 * Callback used by gst_pad_set_blocked_async(). Gets called when the blocking
268 * operation succeeds.
271 typedef void (*GstPadBlockCallback) (GstPad *pad, gboolean blocked, gpointer user_data);
275 * @GST_PAD_UNKNOWN: direction is unknown.
276 * @GST_PAD_SRC: the pad is a source pad.
277 * @GST_PAD_SINK: the pad is a sink pad.
279 * The direction of a pad.
289 * @GST_PAD_BLOCKED: is dataflow on a pad blocked
290 * @GST_PAD_FLUSHING: is pad empying buffers
291 * @GST_PAD_IN_GETCAPS: GstPadGetCapsFunction() is running now
292 * @GST_PAD_IN_SETCAPS: GstPadSetCapsFunction() is running now
293 * @GST_PAD_FLAG_LAST: offset to define more flags
298 GST_PAD_BLOCKED = GST_OBJECT_FLAG_LAST,
304 GST_PAD_FLAG_LAST = GST_OBJECT_FLAG_LAST + 8
307 /* FIXME: this awful circular dependency need to be resolved properly (see padtemplate.h) */
308 typedef struct _GstPadTemplate GstPadTemplate;
313 gpointer element_private;
315 GstPadTemplate *padtemplate;
317 /* direction cannot change after creating the pad */
318 GstPadDirection direction;
320 /*< public >*/ /* with STREAM_LOCK */
321 /* streaming rec_lock */
322 GStaticRecMutex *stream_rec_lock;
324 /*< public >*/ /* with PREROLL_LOCK */
325 GMutex *preroll_lock;
328 /*< public >*/ /* with LOCK */
329 /* block cond, mutex is from the object */
331 GstPadBlockCallback block_callback;
334 /* the pad capabilities */
336 GstPadGetCapsFunction getcapsfunc;
337 GstPadSetCapsFunction setcapsfunc;
338 GstPadAcceptCapsFunction acceptcapsfunc;
339 GstPadFixateCapsFunction fixatecapsfunc;
341 GstPadActivateFunction activatefunc;
342 GstPadActivateModeFunction activatepushfunc;
343 GstPadActivateModeFunction activatepullfunc;
346 GstPadLinkFunction linkfunc;
347 GstPadUnlinkFunction unlinkfunc;
350 gpointer sched_private;
352 /* data transport functions */
353 GstPadChainFunction chainfunc;
354 GstPadCheckGetRangeFunction checkgetrangefunc;
355 GstPadGetRangeFunction getrangefunc;
356 GstPadEventFunction eventfunc;
358 GstActivateMode mode;
360 /* generic query method */
361 GstPadQueryTypeFunction querytypefunc;
362 GstPadQueryFunction queryfunc;
365 GstPadIntLinkFunction intlinkfunc;
367 GstPadBufferAllocFunction bufferallocfunc;
369 /* whether to emit signals for have-data. counts number
370 * of handlers attached. */
371 gint do_buffer_signals;
372 gint do_event_signals;
375 gpointer _gst_reserved[GST_PADDING];
378 struct _GstPadClass {
379 GstObjectClass parent_class;
381 /* signal callbacks */
382 void (*linked) (GstPad *pad, GstPad *peer);
383 void (*unlinked) (GstPad *pad, GstPad *peer);
384 void (*request_link) (GstPad *pad);
385 gboolean (*have_data) (GstPad *pad, GstMiniObject *data);
388 gpointer _gst_reserved[GST_PADDING];
392 /***** helper macros *****/
394 #define GST_PAD_NAME(pad) (GST_OBJECT_NAME(pad))
395 #define GST_PAD_PARENT(pad) (GST_ELEMENT_CAST(GST_OBJECT_PARENT(pad)))
396 #define GST_PAD_ELEMENT_PRIVATE(pad) (GST_PAD_CAST(pad)->element_private)
397 #define GST_PAD_PAD_TEMPLATE(pad) (GST_PAD_CAST(pad)->padtemplate)
398 #define GST_PAD_DIRECTION(pad) (GST_PAD_CAST(pad)->direction)
399 #define GST_PAD_TASK(pad) (GST_PAD_CAST(pad)->task)
400 #define GST_PAD_ACTIVATE_MODE(pad) (GST_PAD_CAST(pad)->mode)
402 #define GST_PAD_ACTIVATEFUNC(pad) (GST_PAD_CAST(pad)->activatefunc)
403 #define GST_PAD_ACTIVATEPUSHFUNC(pad) (GST_PAD_CAST(pad)->activatepushfunc)
404 #define GST_PAD_ACTIVATEPULLFUNC(pad) (GST_PAD_CAST(pad)->activatepullfunc)
405 #define GST_PAD_CHAINFUNC(pad) (GST_PAD_CAST(pad)->chainfunc)
406 #define GST_PAD_CHECKGETRANGEFUNC(pad) (GST_PAD_CAST(pad)->checkgetrangefunc)
407 #define GST_PAD_GETRANGEFUNC(pad) (GST_PAD_CAST(pad)->getrangefunc)
408 #define GST_PAD_EVENTFUNC(pad) (GST_PAD_CAST(pad)->eventfunc)
409 #define GST_PAD_QUERYTYPEFUNC(pad) (GST_PAD_CAST(pad)->querytypefunc)
410 #define GST_PAD_QUERYFUNC(pad) (GST_PAD_CAST(pad)->queryfunc)
411 #define GST_PAD_INTLINKFUNC(pad) (GST_PAD_CAST(pad)->intlinkfunc)
413 #define GST_PAD_PEER(pad) (GST_PAD_CAST(pad)->peer)
414 #define GST_PAD_LINKFUNC(pad) (GST_PAD_CAST(pad)->linkfunc)
415 #define GST_PAD_UNLINKFUNC(pad) (GST_PAD_CAST(pad)->unlinkfunc)
417 #define GST_PAD_CAPS(pad) (GST_PAD_CAST(pad)->caps)
418 #define GST_PAD_GETCAPSFUNC(pad) (GST_PAD_CAST(pad)->getcapsfunc)
419 #define GST_PAD_SETCAPSFUNC(pad) (GST_PAD_CAST(pad)->setcapsfunc)
420 #define GST_PAD_ACCEPTCAPSFUNC(pad) (GST_PAD_CAST(pad)->acceptcapsfunc)
421 #define GST_PAD_FIXATECAPSFUNC(pad) (GST_PAD_CAST(pad)->fixatecapsfunc)
423 #define GST_PAD_BUFFERALLOCFUNC(pad) (GST_PAD_CAST(pad)->bufferallocfunc)
425 #define GST_PAD_DO_BUFFER_SIGNALS(pad) (GST_PAD_CAST(pad)->do_buffer_signals)
426 #define GST_PAD_DO_EVENT_SIGNALS(pad) (GST_PAD_CAST(pad)->do_event_signals)
428 #define GST_PAD_IS_LINKED(pad) (GST_PAD_PEER(pad) != NULL)
429 #define GST_PAD_IS_BLOCKED(pad) (GST_FLAG_IS_SET (pad, GST_PAD_BLOCKED))
430 #define GST_PAD_IS_FLUSHING(pad) (GST_FLAG_IS_SET (pad, GST_PAD_FLUSHING))
431 #define GST_PAD_IS_IN_GETCAPS(pad) (GST_FLAG_IS_SET (pad, GST_PAD_IN_GETCAPS))
432 #define GST_PAD_IS_IN_SETCAPS(pad) (GST_FLAG_IS_SET (pad, GST_PAD_IN_SETCAPS))
433 #define GST_PAD_IS_USABLE(pad) (GST_PAD_IS_LINKED (pad) && \
434 !GST_PAD_IS_FLUSHING(pad) && !GST_PAD_IS_FLUSHING(GST_PAD_PEER (pad)))
435 #define GST_PAD_IS_SRC(pad) (GST_PAD_DIRECTION(pad) == GST_PAD_SRC)
436 #define GST_PAD_IS_SINK(pad) (GST_PAD_DIRECTION(pad) == GST_PAD_SINK)
438 #define GST_PAD_SET_FLUSHING(pad) (GST_FLAG_SET (pad, GST_PAD_FLUSHING))
439 #define GST_PAD_UNSET_FLUSHING(pad) (GST_FLAG_UNSET (pad, GST_PAD_FLUSHING))
441 #define GST_STREAM_GET_LOCK(pad) (GST_PAD_CAST(pad)->stream_rec_lock)
442 #define GST_STREAM_LOCK(pad) (g_static_rec_mutex_lock(GST_STREAM_GET_LOCK(pad)))
443 #define GST_STREAM_TRYLOCK(pad) (g_static_rec_mutex_trylock(GST_STREAM_GET_LOCK(pad)))
444 #define GST_STREAM_UNLOCK(pad) (g_static_rec_mutex_unlock(GST_STREAM_GET_LOCK(pad)))
445 #define GST_STREAM_UNLOCK_FULL(pad) (g_static_rec_mutex_unlock_full(GST_STREAM_GET_LOCK(pad)))
446 #define GST_STREAM_LOCK_FULL(pad,t) (g_static_rec_mutex_lock_full(GST_STREAM_GET_LOCK(pad), t))
448 #define GST_PREROLL_GET_LOCK(pad) (GST_PAD_CAST(pad)->preroll_lock)
449 #define GST_PREROLL_LOCK(pad) (g_mutex_lock(GST_PREROLL_GET_LOCK(pad)))
450 #define GST_PREROLL_TRYLOCK(pad) (g_mutex_trylock(GST_PREROLL_GET_LOCK(pad)))
451 #define GST_PREROLL_UNLOCK(pad) (g_mutex_unlock(GST_PREROLL_GET_LOCK(pad)))
452 #define GST_PREROLL_GET_COND(pad) (GST_PAD_CAST(pad)->preroll_cond)
453 #define GST_PREROLL_WAIT(pad) g_cond_wait (GST_PREROLL_GET_COND (pad), GST_PREROLL_GET_LOCK (pad))
454 #define GST_PREROLL_TIMED_WAIT(pad, timeval) g_cond_timed_wait (GST_PREROLL_GET_COND (pad), GST_PREROLL_GET_LOCK (pad),\
456 #define GST_PREROLL_SIGNAL(pad) g_cond_signal (GST_PREROLL_GET_COND (pad));
457 #define GST_PREROLL_BROADCAST(pad) g_cond_broadcast (GST_PREROLL_GET_COND (pad));
459 #define GST_PAD_BLOCK_GET_COND(pad) (GST_PAD_CAST(pad)->block_cond)
460 #define GST_PAD_BLOCK_WAIT(pad) (g_cond_wait(GST_PAD_BLOCK_GET_COND (pad), GST_GET_LOCK (pad)))
461 #define GST_PAD_BLOCK_SIGNAL(pad) (g_cond_signal(GST_PAD_BLOCK_GET_COND (pad)))
463 /* FIXME: this awful circular dependency need to be resolved properly (see padtemplate.h) */
464 #include <gst/gstpadtemplate.h>
466 GType gst_pad_get_type (void);
469 GstPad* gst_pad_new (const gchar *name, GstPadDirection direction);
470 GstPad* gst_pad_new_from_template (GstPadTemplate *templ, const gchar *name);
474 * @pad: the pad to get the name from
476 * Returns a copy of the name of the pad.
478 * Returns: the name of the pad. g_free() after usage.
482 #define gst_pad_get_name(pad) gst_object_get_name (GST_OBJECT_CAST (pad))
484 * gst_pad_get_parent:
485 * @pad: the pad to get the parent of
487 * Returns the parent of @pad. This function increases the refcount
488 * of the parent object so you should gst_object_unref() it after usage.
490 * Returns: parent of the object, this can be NULL if the pad has no
491 * parent. unref after usage.
495 #define gst_pad_get_parent(pad) gst_object_get_parent (GST_OBJECT_CAST (pad))
497 GstPadDirection gst_pad_get_direction (GstPad *pad);
499 gboolean gst_pad_set_active (GstPad *pad, gboolean active);
500 gboolean gst_pad_is_active (GstPad *pad);
501 gboolean gst_pad_activate_pull (GstPad *pad, gboolean active);
502 gboolean gst_pad_activate_push (GstPad *pad, gboolean active);
504 gboolean gst_pad_set_blocked (GstPad *pad, gboolean blocked);
505 gboolean gst_pad_set_blocked_async (GstPad *pad, gboolean blocked,
506 GstPadBlockCallback callback, gpointer user_data);
507 gboolean gst_pad_is_blocked (GstPad *pad);
509 void gst_pad_set_element_private (GstPad *pad, gpointer priv);
510 gpointer gst_pad_get_element_private (GstPad *pad);
512 GstPadTemplate* gst_pad_get_pad_template (GstPad *pad);
514 void gst_pad_set_bufferalloc_function (GstPad *pad, GstPadBufferAllocFunction bufalloc);
515 GstFlowReturn gst_pad_alloc_buffer (GstPad *pad, guint64 offset, gint size,
516 GstCaps *caps, GstBuffer **buf);
518 /* data passing setup functions */
519 void gst_pad_set_activate_function (GstPad *pad, GstPadActivateFunction activate);
520 void gst_pad_set_activatepull_function (GstPad *pad, GstPadActivateModeFunction activatepull);
521 void gst_pad_set_activatepush_function (GstPad *pad, GstPadActivateModeFunction activatepush);
522 void gst_pad_set_chain_function (GstPad *pad, GstPadChainFunction chain);
523 void gst_pad_set_getrange_function (GstPad *pad, GstPadGetRangeFunction get);
524 void gst_pad_set_checkgetrange_function (GstPad *pad, GstPadCheckGetRangeFunction check);
525 void gst_pad_set_event_function (GstPad *pad, GstPadEventFunction event);
528 void gst_pad_set_link_function (GstPad *pad, GstPadLinkFunction link);
529 void gst_pad_set_unlink_function (GstPad *pad, GstPadUnlinkFunction unlink);
531 GstPadLinkReturn gst_pad_link (GstPad *srcpad, GstPad *sinkpad);
532 gboolean gst_pad_unlink (GstPad *srcpad, GstPad *sinkpad);
533 gboolean gst_pad_is_linked (GstPad *pad);
535 GstPad* gst_pad_get_peer (GstPad *pad);
537 /* capsnego functions */
538 void gst_pad_set_getcaps_function (GstPad *pad, GstPadGetCapsFunction getcaps);
539 void gst_pad_set_acceptcaps_function (GstPad *pad, GstPadAcceptCapsFunction acceptcaps);
540 void gst_pad_set_fixatecaps_function (GstPad *pad, GstPadFixateCapsFunction fixatecaps);
541 void gst_pad_set_setcaps_function (GstPad *pad, GstPadSetCapsFunction setcaps);
543 G_CONST_RETURN GstCaps* gst_pad_get_pad_template_caps (GstPad *pad);
545 /* capsnego function for connected/unconnected pads */
546 GstCaps * gst_pad_get_caps (GstPad * pad);
547 void gst_pad_fixate_caps (GstPad * pad, GstCaps *caps);
548 gboolean gst_pad_accept_caps (GstPad * pad, GstCaps *caps);
549 gboolean gst_pad_set_caps (GstPad * pad, GstCaps *caps);
551 GstCaps * gst_pad_peer_get_caps (GstPad * pad);
552 gboolean gst_pad_peer_accept_caps (GstPad * pad, GstCaps *caps);
554 /* capsnego for connected pads */
555 GstCaps * gst_pad_get_allowed_caps (GstPad * srcpad);
556 GstCaps * gst_pad_get_negotiated_caps (GstPad * pad);
558 /* data passing functions to peer */
559 GstFlowReturn gst_pad_push (GstPad *pad, GstBuffer *buffer);
560 gboolean gst_pad_check_pull_range (GstPad *pad);
561 GstFlowReturn gst_pad_pull_range (GstPad *pad, guint64 offset, guint size,
563 gboolean gst_pad_push_event (GstPad *pad, GstEvent *event);
564 gboolean gst_pad_event_default (GstPad *pad, GstEvent *event);
566 /* data passing functions on pad */
567 GstFlowReturn gst_pad_chain (GstPad *pad, GstBuffer *buffer);
568 GstFlowReturn gst_pad_get_range (GstPad *pad, guint64 offset, guint size,
570 gboolean gst_pad_send_event (GstPad *pad, GstEvent *event);
573 gboolean gst_pad_start_task (GstPad *pad, GstTaskFunction func,
575 gboolean gst_pad_pause_task (GstPad *pad);
576 gboolean gst_pad_stop_task (GstPad *pad);
579 void gst_pad_set_internal_link_function (GstPad *pad, GstPadIntLinkFunction intlink);
580 GList* gst_pad_get_internal_links (GstPad *pad);
581 GList* gst_pad_get_internal_links_default (GstPad *pad);
583 /* generic query function */
584 void gst_pad_set_query_type_function (GstPad *pad, GstPadQueryTypeFunction type_func);
585 G_CONST_RETURN GstQueryType*
586 gst_pad_get_query_types (GstPad *pad);
587 G_CONST_RETURN GstQueryType*
588 gst_pad_get_query_types_default (GstPad *pad);
590 gboolean gst_pad_query (GstPad *pad, GstQuery *query);
591 void gst_pad_set_query_function (GstPad *pad, GstPadQueryFunction query);
592 gboolean gst_pad_query_default (GstPad *pad, GstQuery *query);
594 /* misc helper functions */
595 gboolean gst_pad_dispatcher (GstPad *pad, GstPadDispatcherFunction dispatch,
598 #ifndef GST_DISABLE_LOADSAVE
599 void gst_pad_load_and_link (xmlNodePtr self, GstObject *parent);
604 #endif /* __GST_PAD_H__ */