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/gstprobe.h>
34 #include <gst/gstquery.h>
39 extern GType _gst_pad_type;
40 extern GType _gst_real_pad_type;
41 extern GType _gst_ghost_pad_type;
46 #define GST_TYPE_PAD (_gst_pad_type)
47 #define GST_IS_PAD(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_PAD))
48 #define GST_IS_PAD_FAST(obj) (G_OBJECT_TYPE(obj) == GST_TYPE_REAL_PAD || \
49 G_OBJECT_TYPE(obj) == GST_TYPE_GHOST_PAD)
50 #define GST_IS_PAD_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_PAD))
51 #define GST_PAD(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_PAD, GstPad))
52 #define GST_PAD_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_PAD, GstPadClass))
57 #define GST_TYPE_REAL_PAD (_gst_real_pad_type)
58 #define GST_IS_REAL_PAD(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_REAL_PAD))
59 #define GST_IS_REAL_PAD_FAST(obj) (G_OBJECT_TYPE(obj) == GST_TYPE_REAL_PAD)
60 #define GST_IS_REAL_PAD_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_REAL_PAD))
61 #define GST_REAL_PAD(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_REAL_PAD, GstRealPad))
62 #define GST_REAL_PAD_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_REAL_PAD, GstRealPadClass))
67 #define GST_TYPE_GHOST_PAD (_gst_ghost_pad_type)
68 #define GST_IS_GHOST_PAD(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_GHOST_PAD))
69 #define GST_IS_GHOST_PAD_FAST(obj) (G_OBJECT_TYPE(obj) == GST_TYPE_GHOST_PAD)
70 #define GST_IS_GHOST_PAD_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_GHOST_PAD))
71 #define GST_GHOST_PAD(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_GHOST_PAD, GstGhostPad))
72 #define GST_GHOST_PAD_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_GHOST_PAD, GstGhostPadClass))
75 /*typedef struct _GstPad GstPad; */
76 /*typedef struct _GstPadClass GstPadClass;*/
77 typedef struct _GstRealPad GstRealPad;
78 typedef struct _GstRealPadClass GstRealPadClass;
79 typedef struct _GstGhostPad GstGhostPad;
80 typedef struct _GstGhostPadClass GstGhostPadClass;
81 /*typedef struct _GstPadTemplate GstPadTemplate;*/
82 /*typedef struct _GstPadTemplateClass GstPadTemplateClass;*/
86 GST_PAD_LINK_REFUSED = -1,
87 GST_PAD_LINK_DELAYED = 0,
92 /* convenience functions */
93 #ifdef G_HAVE_ISO_VARARGS
94 #define GST_PAD_QUERY_TYPE_FUNCTION(functionname, ...) GST_QUERY_TYPE_FUNCTION (GstPad *, functionname, __VA_ARGS__);
95 #define GST_PAD_FORMATS_FUNCTION(functionname, ...) GST_FORMATS_FUNCTION (GstPad *, functionname, __VA_ARGS__);
96 #define GST_PAD_EVENT_MASK_FUNCTION(functionname, ...) GST_EVENT_MASK_FUNCTION (GstPad *, functionname, __VA_ARGS__);
97 #elif defined(G_HAVE_GNUC_VARARGS)
98 #define GST_PAD_QUERY_TYPE_FUNCTION(functionname, a...) GST_QUERY_TYPE_FUNCTION (GstPad *, functionname, a);
99 #define GST_PAD_FORMATS_FUNCTION(functionname, a...) GST_FORMATS_FUNCTION (GstPad *, functionname, a);
100 #define GST_PAD_EVENT_MASK_FUNCTION(functionname, a...) GST_EVENT_MASK_FUNCTION (GstPad *, functionname, a);
104 /* this defines the functions used to chain buffers
105 * pad is the sink pad (so the same chain function can be used for N pads)
106 * buf is the buffer being passed */
107 typedef void (*GstPadChainFunction) (GstPad *pad,GstData *data);
108 typedef GstData* (*GstPadGetFunction) (GstPad *pad);
109 typedef gboolean (*GstPadEventFunction) (GstPad *pad, GstEvent *event);
110 typedef gboolean (*GstPadConvertFunction) (GstPad *pad,
111 GstFormat src_format, gint64 src_value,
112 GstFormat *dest_format, gint64 *dest_value);
113 typedef gboolean (*GstPadQueryFunction) (GstPad *pad, GstQueryType type,
114 GstFormat *format, gint64 *value);
115 typedef GList* (*GstPadIntLinkFunction) (GstPad *pad);
116 typedef const GstFormat* (*GstPadFormatsFunction) (GstPad *pad);
117 typedef const GstEventMask* (*GstPadEventMaskFunction) (GstPad *pad);
118 typedef const GstQueryType* (*GstPadQueryTypeFunction) (GstPad *pad);
120 typedef GstPadLinkReturn (*GstPadLinkFunction) (GstPad *pad, GstCaps *caps);
121 typedef void (*GstPadUnlinkFunction) (GstPad *pad);
122 typedef GstCaps* (*GstPadGetCapsFunction) (GstPad *pad, GstCaps *caps);
123 typedef GstBufferPool* (*GstPadBufferPoolFunction) (GstPad *pad);
125 typedef gboolean (*GstPadDispatcherFunction) (GstPad *pad, gpointer data);
134 GST_PAD_DISABLED = GST_OBJECT_FLAG_LAST,
137 GST_PAD_FLAG_LAST = GST_OBJECT_FLAG_LAST + 4
143 gpointer element_private;
145 GstPadTemplate *padtemplate; /* the template for this pad */
147 gpointer _gst_reserved[GST_PADDING];
150 struct _GstPadClass {
151 GstObjectClass parent_class;
153 gpointer _gst_reserved[GST_PADDING];
159 /* the pad capabilities */
163 GstPadGetCapsFunction getcapsfunc;
165 GstPadDirection direction;
167 GstPadLinkFunction linkfunc;
168 GstPadUnlinkFunction unlinkfunc;
171 gpointer sched_private;
173 /* data transport functions */
174 GstPadChainFunction chainfunc;
175 GstPadChainFunction chainhandler;
176 GstPadGetFunction getfunc;
177 GstPadGetFunction gethandler;
178 GstPadEventFunction eventfunc;
179 GstPadEventFunction eventhandler;
180 GstPadEventMaskFunction eventmaskfunc;
184 /* query/convert/formats functions */
185 GstPadConvertFunction convertfunc;
186 GstPadQueryFunction queryfunc;
187 GstPadFormatsFunction formatsfunc;
188 GstPadQueryTypeFunction querytypefunc;
189 GstPadIntLinkFunction intlinkfunc;
191 GstPadBufferPoolFunction bufferpoolfunc;
193 GstProbeDispatcher probedisp;
195 gpointer _gst_reserved[GST_PADDING];
198 struct _GstRealPadClass {
199 GstPadClass parent_class;
201 /* signal callbacks */
202 void (*caps_nego_failed) (GstPad *pad, GstCaps *caps);
204 void (*linked) (GstPad *pad, GstPad *peer);
205 void (*unlinked) (GstPad *pad, GstPad *peer);
207 gpointer _gst_reserved[GST_PADDING];
210 struct _GstGhostPad {
215 gpointer _gst_reserved[GST_PADDING];
218 struct _GstGhostPadClass {
219 GstPadClass parent_class;
221 gpointer _gst_reserved[GST_PADDING];
225 /***** helper macros *****/
227 #define GST_PAD_NAME(pad) (GST_OBJECT_NAME(pad))
228 #define GST_PAD_PARENT(pad) ((GstElement *)(GST_OBJECT_PARENT(pad)))
229 #define GST_PAD_ELEMENT_PRIVATE(pad) (((GstPad *)(pad))->element_private)
230 #define GST_PAD_PAD_TEMPLATE(pad) (((GstPad *)(pad))->padtemplate)
233 #define GST_RPAD_DIRECTION(pad) (((GstRealPad *)(pad))->direction)
234 #define GST_RPAD_CAPS(pad) (((GstRealPad *)(pad))->caps)
235 #define GST_RPAD_FILTER(pad) (((GstRealPad *)(pad))->filter)
236 #define GST_RPAD_APPFILTER(pad) (((GstRealPad *)(pad))->appfilter)
237 #define GST_RPAD_PEER(pad) (((GstRealPad *)(pad))->peer)
238 #define GST_RPAD_CHAINFUNC(pad) (((GstRealPad *)(pad))->chainfunc)
239 #define GST_RPAD_CHAINHANDLER(pad) (((GstRealPad *)(pad))->chainhandler)
240 #define GST_RPAD_GETFUNC(pad) (((GstRealPad *)(pad))->getfunc)
241 #define GST_RPAD_GETHANDLER(pad) (((GstRealPad *)(pad))->gethandler)
242 #define GST_RPAD_EVENTFUNC(pad) (((GstRealPad *)(pad))->eventfunc)
243 #define GST_RPAD_EVENTHANDLER(pad) (((GstRealPad *)(pad))->eventhandler)
244 #define GST_RPAD_CONVERTFUNC(pad) (((GstRealPad *)(pad))->convertfunc)
245 #define GST_RPAD_QUERYFUNC(pad) (((GstRealPad *)(pad))->queryfunc)
246 #define GST_RPAD_INTLINKFUNC(pad) (((GstRealPad *)(pad))->intlinkfunc)
247 #define GST_RPAD_FORMATSFUNC(pad) (((GstRealPad *)(pad))->formatsfunc)
248 #define GST_RPAD_QUERYTYPEFUNC(pad) (((GstRealPad *)(pad))->querytypefunc)
249 #define GST_RPAD_EVENTMASKFUNC(pad) (((GstRealPad *)(pad))->eventmaskfunc)
251 #define GST_RPAD_LINKFUNC(pad) (((GstRealPad *)(pad))->linkfunc)
252 #define GST_RPAD_UNLINKFUNC(pad) (((GstRealPad *)(pad))->unlinkfunc)
253 #define GST_RPAD_GETCAPSFUNC(pad) (((GstRealPad *)(pad))->getcapsfunc)
254 #define GST_RPAD_BUFFERPOOLFUNC(pad) (((GstRealPad *)(pad))->bufferpoolfunc)
257 #define GST_GPAD_REALPAD(pad) (((GstGhostPad *)(pad))->realpad)
260 #define GST_PAD_REALIZE(pad) (GST_IS_REAL_PAD(pad) ? ((GstRealPad *)(pad)) : GST_GPAD_REALPAD(pad))
261 #define GST_PAD_DIRECTION(pad) GST_RPAD_DIRECTION(GST_PAD_REALIZE(pad))
262 #define GST_PAD_CAPS(pad) GST_RPAD_CAPS(GST_PAD_REALIZE(pad))
263 #define GST_PAD_PEER(pad) GST_PAD(GST_RPAD_PEER(GST_PAD_REALIZE(pad)))
265 /* Some check functions (unused?) */
266 #define GST_PAD_IS_LINKED(pad) (GST_PAD_PEER(pad) != NULL)
267 #define GST_PAD_IS_ACTIVE(pad) (!GST_FLAG_IS_SET(GST_PAD_REALIZE(pad), GST_PAD_DISABLED))
268 #define GST_PAD_IS_USABLE(pad) (GST_PAD_IS_LINKED (pad) && \
269 GST_PAD_IS_ACTIVE(pad) && GST_PAD_IS_ACTIVE(GST_PAD_PEER (pad)))
270 #define GST_PAD_CAN_PULL(pad) (GST_IS_REAL_PAD(pad) && GST_REAL_PAD(pad)->gethandler != NULL)
271 #define GST_PAD_IS_SRC(pad) (GST_PAD_DIRECTION(pad) == GST_PAD_SRC)
272 #define GST_PAD_IS_SINK(pad) (GST_PAD_DIRECTION(pad) == GST_PAD_SINK)
274 /***** PadTemplate *****/
275 #define GST_TYPE_PAD_TEMPLATE (gst_pad_template_get_type ())
276 #define GST_PAD_TEMPLATE(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_PAD_TEMPLATE,GstPadTemplate))
277 #define GST_PAD_TEMPLATE_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_PAD_TEMPLATE,GstPadTemplateClass))
278 #define GST_IS_PAD_TEMPLATE(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_PAD_TEMPLATE))
279 #define GST_IS_PAD_TEMPLATE_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_PAD_TEMPLATE))
287 #define GST_PAD_TEMPLATE_NAME_TEMPLATE(templ) (((GstPadTemplate *)(templ))->name_template)
288 #define GST_PAD_TEMPLATE_DIRECTION(templ) (((GstPadTemplate *)(templ))->direction)
289 #define GST_PAD_TEMPLATE_PRESENCE(templ) (((GstPadTemplate *)(templ))->presence)
290 #define GST_PAD_TEMPLATE_CAPS(templ) (((GstPadTemplate *)(templ))->caps)
293 GST_PAD_TEMPLATE_FIXED = GST_OBJECT_FLAG_LAST,
295 GST_PAD_TEMPLATE_FLAG_LAST = GST_OBJECT_FLAG_LAST + 4
296 } GstPadTemplateFlags;
298 #define GST_PAD_TEMPLATE_IS_FIXED(templ) (GST_FLAG_IS_SET(templ, GST_PAD_TEMPLATE_FIXED))
300 struct _GstPadTemplate {
303 gchar *name_template;
304 GstPadDirection direction;
305 GstPadPresence presence;
308 gpointer _gst_reserved[GST_PADDING];
311 struct _GstPadTemplateClass {
312 GstObjectClass parent_class;
314 /* signal callbacks */
315 void (*pad_created) (GstPadTemplate *templ, GstPad *pad);
317 gpointer _gst_reserved[GST_PADDING];
320 #ifdef G_HAVE_ISO_VARARGS
321 #define GST_PAD_TEMPLATE_NEW(padname, dir, pres, ...) \
322 gst_pad_template_new ( \
329 #define GST_PAD_TEMPLATE_FACTORY(name, padname, dir, pres, ...) \
330 static GstPadTemplate* \
333 static GstPadTemplate *templ = NULL; \
335 templ = GST_PAD_TEMPLATE_NEW ( \
341 return (GstPadTemplate *)g_object_ref((GObject *)templ); \
343 #elif defined(G_HAVE_GNUC_VARARGS)
344 /* CR1: the space after 'a' is necessary because of preprocessing in gcc */
345 #define GST_PAD_TEMPLATE_NEW(padname, dir, pres, a...) \
346 gst_pad_template_new ( \
353 #define GST_PAD_TEMPLATE_FACTORY(name, padname, dir, pres, a...) \
354 static GstPadTemplate* \
357 static GstPadTemplate *templ = NULL; \
359 templ = GST_PAD_TEMPLATE_NEW ( \
365 return (GstPadTemplate *)g_object_ref((GObject *)templ); \
369 #define GST_PAD_TEMPLATE_GET(fact) (fact)()
371 GType gst_pad_get_type (void);
372 GType gst_real_pad_get_type (void);
373 GType gst_ghost_pad_get_type (void);
376 GstPad* gst_pad_new (const gchar *name, GstPadDirection direction);
377 GstPad* gst_pad_new_from_template (GstPadTemplate *templ, const gchar *name);
378 GstPad* gst_pad_custom_new (GType type, const gchar *name, GstPadDirection direction);
379 GstPad* gst_pad_custom_new_from_template (GType type, GstPadTemplate *templ, const gchar *name);
381 void gst_pad_set_name (GstPad *pad, const gchar *name);
382 G_CONST_RETURN gchar* gst_pad_get_name (GstPad *pad);
384 GstPadDirection gst_pad_get_direction (GstPad *pad);
386 void gst_pad_set_active (GstPad *pad, gboolean active);
387 gboolean gst_pad_is_active (GstPad *pad);
389 void gst_pad_set_element_private (GstPad *pad, gpointer priv);
390 gpointer gst_pad_get_element_private (GstPad *pad);
392 void gst_pad_set_parent (GstPad *pad, GstElement *parent);
393 GstElement* gst_pad_get_parent (GstPad *pad);
394 GstElement* gst_pad_get_real_parent (GstPad *pad);
396 GstScheduler* gst_pad_get_scheduler (GstPad *pad);
398 void gst_pad_add_ghost_pad (GstPad *pad, GstPad *ghostpad);
399 void gst_pad_remove_ghost_pad (GstPad *pad, GstPad *ghostpad);
400 GList* gst_pad_get_ghost_pad_list (GstPad *pad);
402 GstPadTemplate* gst_pad_get_pad_template (GstPad *pad);
404 void gst_pad_set_bufferpool_function (GstPad *pad, GstPadBufferPoolFunction bufpool);
405 GstBufferPool* gst_pad_get_bufferpool (GstPad *pad);
407 /* data passing setup functions */
408 void gst_pad_set_chain_function (GstPad *pad, GstPadChainFunction chain);
409 void gst_pad_set_get_function (GstPad *pad, GstPadGetFunction get);
410 void gst_pad_set_event_function (GstPad *pad, GstPadEventFunction event);
411 void gst_pad_set_event_mask_function (GstPad *pad, GstPadEventMaskFunction mask_func);
412 G_CONST_RETURN GstEventMask*
413 gst_pad_get_event_masks (GstPad *pad);
414 G_CONST_RETURN GstEventMask*
415 gst_pad_get_event_masks_default (GstPad *pad);
418 void gst_pad_set_link_function (GstPad *pad, GstPadLinkFunction link);
419 gboolean gst_pad_can_link (GstPad *srcpad, GstPad *sinkpad);
420 gboolean gst_pad_can_link_filtered (GstPad *srcpad, GstPad *sinkpad, GstCaps *filtercaps);
421 void gst_pad_set_unlink_function (GstPad *pad, GstPadUnlinkFunction unlink);
423 gboolean gst_pad_link (GstPad *srcpad, GstPad *sinkpad);
424 gboolean gst_pad_link_filtered (GstPad *srcpad, GstPad *sinkpad, GstCaps *filtercaps);
425 void gst_pad_unlink (GstPad *srcpad, GstPad *sinkpad);
427 GstPad* gst_pad_get_peer (GstPad *pad);
429 /* capsnego functions */
430 GstCaps* gst_pad_get_caps (GstPad *pad);
431 GstCaps* gst_pad_get_pad_template_caps (GstPad *pad);
432 GstPadLinkReturn gst_pad_try_set_caps (GstPad *pad, GstCaps *caps);
433 gboolean gst_pad_check_compatibility (GstPad *srcpad, GstPad *sinkpad);
435 void gst_pad_set_getcaps_function (GstPad *pad, GstPadGetCapsFunction getcaps);
436 GstPadLinkReturn gst_pad_proxy_link (GstPad *pad, GstCaps *caps);
437 gboolean gst_pad_relink_filtered (GstPad *srcpad, GstPad *sinkpad, GstCaps *filtercaps);
438 gboolean gst_pad_perform_negotiate (GstPad *srcpad, GstPad *sinkpad);
439 gboolean gst_pad_try_relink_filtered (GstPad *srcpad, GstPad *sinkpad, GstCaps *filtercaps);
440 GstCaps* gst_pad_get_allowed_caps (GstPad *pad);
441 gboolean gst_pad_recalc_allowed_caps (GstPad *pad);
443 gboolean gst_pad_recover_caps_error (GstPad *pad, GstCaps *allowed);
445 /* data passing functions */
446 void gst_pad_push (GstPad *pad, GstData *data);
447 GstData* gst_pad_pull (GstPad *pad);
448 gboolean gst_pad_send_event (GstPad *pad, GstEvent *event);
449 gboolean gst_pad_event_default (GstPad *pad, GstEvent *event);
450 GstPad* gst_pad_selectv (GList *padlist);
451 GstPad* gst_pad_select (GstPad *pad, ...);
452 GstPad* gst_pad_select_valist (GstPad *pad, va_list varargs);
455 /* convert/query/format functions */
456 void gst_pad_set_formats_function (GstPad *pad,
457 GstPadFormatsFunction formats);
458 G_CONST_RETURN GstFormat*
459 gst_pad_get_formats (GstPad *pad);
460 G_CONST_RETURN GstFormat*
461 gst_pad_get_formats_default (GstPad *pad);
463 void gst_pad_set_convert_function (GstPad *pad, GstPadConvertFunction convert);
464 gboolean gst_pad_convert (GstPad *pad,
465 GstFormat src_format, gint64 src_value,
466 GstFormat *dest_format, gint64 *dest_value);
467 gboolean gst_pad_convert_default (GstPad *pad,
468 GstFormat src_format, gint64 src_value,
469 GstFormat *dest_format, gint64 *dest_value);
471 void gst_pad_set_query_function (GstPad *pad, GstPadQueryFunction query);
472 void gst_pad_set_query_type_function (GstPad *pad, GstPadQueryTypeFunction type_func);
473 G_CONST_RETURN GstQueryType*
474 gst_pad_get_query_types (GstPad *pad);
475 G_CONST_RETURN GstQueryType*
476 gst_pad_get_query_types_default (GstPad *pad);
477 gboolean gst_pad_query (GstPad *pad, GstQueryType type,
478 GstFormat *format, gint64 *value);
479 gboolean gst_pad_query_default (GstPad *pad, GstQueryType type,
480 GstFormat *format, gint64 *value);
482 void gst_pad_set_internal_link_function (GstPad *pad, GstPadIntLinkFunction intlink);
483 GList* gst_pad_get_internal_links (GstPad *pad);
484 GList* gst_pad_get_internal_links_default (GstPad *pad);
486 /* misc helper functions */
487 gboolean gst_pad_dispatcher (GstPad *pad, GstPadDispatcherFunction dispatch,
490 #define gst_pad_add_probe(pad, probe) \
491 (gst_probe_dispatcher_add_probe (&(GST_REAL_PAD (pad)->probedisp), probe))
492 #define gst_pad_remove_probe(pad, probe) \
493 (gst_probe_dispatcher_remove_probe (&(GST_REAL_PAD (pad)->probedisp), probe))
495 #ifndef GST_DISABLE_LOADSAVE
496 void gst_pad_load_and_link (xmlNodePtr self, GstObject *parent);
501 GstPad* gst_ghost_pad_new (const gchar *name, GstPad *pad);
504 /* templates and factories */
505 GType gst_pad_template_get_type (void);
507 GstPadTemplate* gst_pad_template_new (const gchar *name_template,
508 GstPadDirection direction, GstPadPresence presence,
511 GstPadTemplate* gst_pad_template_newv (const gchar *name_template,
512 GstPadDirection direction, GstPadPresence presence,
513 GstCaps *caps, va_list var_args);
515 GstCaps* gst_pad_template_get_caps (GstPadTemplate *templ);
516 GstCaps* gst_pad_template_get_caps_by_name (GstPadTemplate *templ, const gchar *name);
518 #ifndef GST_DISABLE_LOADSAVE
519 xmlNodePtr gst_ghost_pad_save_thyself (GstPad *pad,
526 #endif /* __GST_PAD_H__ */