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 GST_EXPORT GType _gst_pad_type;
40 GST_EXPORT GType _gst_real_pad_type;
41 GST_EXPORT 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))
53 #define GST_PAD_CAST(obj) ((GstPad*)(obj))
58 #define GST_TYPE_REAL_PAD (_gst_real_pad_type)
59 #define GST_IS_REAL_PAD(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_REAL_PAD))
60 #define GST_IS_REAL_PAD_FAST(obj) (G_OBJECT_TYPE(obj) == GST_TYPE_REAL_PAD)
61 #define GST_IS_REAL_PAD_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_REAL_PAD))
62 #define GST_REAL_PAD(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_REAL_PAD, GstRealPad))
63 #define GST_REAL_PAD_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_REAL_PAD, GstRealPadClass))
64 #define GST_REAL_PAD_CAST(obj) ((GstRealPad*)(obj))
69 #define GST_TYPE_GHOST_PAD (_gst_ghost_pad_type)
70 #define GST_IS_GHOST_PAD(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_GHOST_PAD))
71 #define GST_IS_GHOST_PAD_FAST(obj) (G_OBJECT_TYPE(obj) == GST_TYPE_GHOST_PAD)
72 #define GST_IS_GHOST_PAD_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_GHOST_PAD))
73 #define GST_GHOST_PAD(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_GHOST_PAD, GstGhostPad))
74 #define GST_GHOST_PAD_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_GHOST_PAD, GstGhostPadClass))
75 #define GST_GHOST_PAD_CAST(obj) ((GstGhostPad*)(obj))
78 /*typedef struct _GstPad GstPad; */
79 /*typedef struct _GstPadClass GstPadClass;*/
80 typedef struct _GstRealPad GstRealPad;
81 typedef struct _GstRealPadClass GstRealPadClass;
82 typedef struct _GstGhostPad GstGhostPad;
83 typedef struct _GstGhostPadClass GstGhostPadClass;
84 /*typedef struct _GstPadTemplate GstPadTemplate;*/
85 /*typedef struct _GstPadTemplateClass GstPadTemplateClass;*/
86 typedef struct _GstStaticPadTemplate GstStaticPadTemplate;
87 typedef struct _GstPadLink GstPadLink;
90 GST_PAD_LINK_REFUSED = -1,
91 GST_PAD_LINK_DELAYED = 0,
96 #define GST_PAD_LINK_FAILED(ret) (ret < GST_PAD_LINK_OK)
97 #define GST_PAD_LINK_SUCCESSFUL(ret) (ret >= GST_PAD_LINK_OK)
100 GST_FLOW_OK = 0, /* data passing was ok */
101 GST_FLOW_RESEND = 1, /* resend buffer, possibly with new caps */
102 GST_FLOW_ERROR = -1, /* some (fatal) error occured */
103 GST_FLOW_NOT_CONNECTED = -2, /* pad is not connected */
104 GST_FLOW_NOT_NEGOTIATED = -3, /* pad is not negotiated */
105 GST_FLOW_WRONG_STATE = -4, /* pad is in wrong state */
106 GST_FLOW_UNEXPECTED = -5, /* did not expect anything, this is not fatal */
107 GST_FLOW_NOT_SUPPORTED = -6 /* function not supported */
116 /* convenience functions */
117 #ifdef G_HAVE_ISO_VARARGS
118 #define GST_PAD_QUERY_TYPE_FUNCTION(functionname, ...) GST_QUERY_TYPE_FUNCTION (GstPad *, functionname, __VA_ARGS__);
119 #define GST_PAD_FORMATS_FUNCTION(functionname, ...) GST_FORMATS_FUNCTION (GstPad *, functionname, __VA_ARGS__);
120 #define GST_PAD_EVENT_MASK_FUNCTION(functionname, ...) GST_EVENT_MASK_FUNCTION (GstPad *, functionname, __VA_ARGS__);
121 #elif defined(G_HAVE_GNUC_VARARGS)
122 #define GST_PAD_QUERY_TYPE_FUNCTION(functionname, a...) GST_QUERY_TYPE_FUNCTION (GstPad *, functionname, a);
123 #define GST_PAD_FORMATS_FUNCTION(functionname, a...) GST_FORMATS_FUNCTION (GstPad *, functionname, a);
124 #define GST_PAD_EVENT_MASK_FUNCTION(functionname, a...) GST_EVENT_MASK_FUNCTION (GstPad *, functionname, a);
129 typedef gboolean (*GstPadActivateFunction) (GstPad *pad, GstActivateMode mode);
131 /* this defines the functions used to chain buffers
132 * pad is the sink pad (so the same chain function can be used for N pads)
133 * buf is the buffer being passed */
134 typedef void (*GstPadChainFunction) (GstPad *pad,GstData *data);
135 typedef GstData* (*GstPadGetFunction) (GstPad *pad);
136 typedef gboolean (*GstPadEventFunction) (GstPad *pad, GstEvent *event);
138 /* convert/query/format functions */
139 typedef gboolean (*GstPadConvertFunction) (GstPad *pad,
140 GstFormat src_format, gint64 src_value,
141 GstFormat *dest_format, gint64 *dest_value);
142 typedef gboolean (*GstPadQueryFunction) (GstPad *pad, GstQueryType type,
143 GstFormat *format, gint64 *value);
144 typedef GList* (*GstPadIntLinkFunction) (GstPad *pad);
145 typedef const GstFormat* (*GstPadFormatsFunction) (GstPad *pad);
146 typedef const GstEventMask* (*GstPadEventMaskFunction) (GstPad *pad);
147 typedef const GstQueryType* (*GstPadQueryTypeFunction) (GstPad *pad);
150 typedef GstPadLinkReturn (*GstPadLinkFunction) (GstPad *pad, const GstCaps *caps);
151 typedef void (*GstPadUnlinkFunction) (GstPad *pad);
154 typedef GstCaps* (*GstPadGetCapsFunction) (GstPad *pad);
155 typedef GstCaps* (*GstPadFixateFunction) (GstPad *pad, const GstCaps *caps);
156 typedef GstBuffer* (*GstPadBufferAllocFunction) (GstPad *pad, guint64 offset, guint size);
159 typedef gboolean (*GstPadDispatcherFunction) (GstPad *pad, gpointer data);
168 GST_PAD_ACTIVE = GST_OBJECT_FLAG_LAST,
172 GST_PAD_FLAG_LAST = GST_OBJECT_FLAG_LAST + 8
178 gpointer element_private;
180 GstPadTemplate *padtemplate; /* the template for this pad */
182 gpointer _gst_reserved[GST_PADDING];
185 struct _GstPadClass {
186 GstObjectClass parent_class;
188 gpointer _gst_reserved[GST_PADDING];
192 GST_RPAD_IN_GETFUNC = GST_PAD_FLAG_LAST,
193 GST_RPAD_IN_CHAINFUNC,
194 GST_RPAD_FLAG_LAST = GST_PAD_FLAG_LAST + 4
200 /* direction cannot change after creating the pad */
201 GstPadDirection direction;
203 /* the pad capabilities */
206 GstPadGetCapsFunction getcapsfunc;
207 GstPadFixateFunction appfixatefunc;
208 GstPadFixateFunction fixatefunc;
211 GstPadLinkFunction linkfunc;
212 GstPadUnlinkFunction unlinkfunc;
215 gpointer sched_private;
217 /* data transport functions */
218 GstPadChainFunction chainfunc;
219 GstPadChainFunction chainhandler;
220 GstPadGetFunction getfunc;
221 GstPadGetFunction gethandler;
222 GstPadEventFunction eventfunc;
223 GstPadEventFunction eventhandler;
225 GstPadEventMaskFunction eventmaskfunc;
229 guint32 ghostpads_cookie;
231 /* query/convert/formats functions */
232 GstPadConvertFunction convertfunc;
233 GstPadQueryFunction queryfunc;
234 GstPadFormatsFunction formatsfunc;
235 GstPadQueryTypeFunction querytypefunc;
236 GstPadIntLinkFunction intlinkfunc;
238 GstPadBufferAllocFunction bufferallocfunc;
240 GstProbeDispatcher probedisp;
243 GstCaps *explicit_caps;
246 gpointer _gst_reserved[GST_PADDING];
249 struct _GstRealPadClass {
250 GstPadClass parent_class;
252 /* signal callbacks */
253 void (*linked) (GstPad *pad, GstPad *peer);
254 void (*unlinked) (GstPad *pad, GstPad *peer);
255 GstPadFixateFunction appfixatefunc;
257 void (*caps_nego_failed) (GstPad *pad, GstCaps *caps);
260 gpointer _gst_reserved[GST_PADDING];
263 struct _GstGhostPad {
268 gpointer _gst_reserved[GST_PADDING];
271 struct _GstGhostPadClass {
272 GstPadClass parent_class;
274 gpointer _gst_reserved[GST_PADDING];
278 /***** helper macros *****/
280 #define GST_PAD_NAME(pad) (GST_OBJECT_NAME(pad))
281 #define GST_PAD_PARENT(pad) (GST_ELEMENT_CAST(GST_OBJECT_PARENT(pad)))
282 #define GST_PAD_ELEMENT_PRIVATE(pad) (GST_PAD_CAST(pad)->element_private)
283 #define GST_PAD_PAD_TEMPLATE(pad) (GST_PAD_CAST(pad)->padtemplate)
286 #define GST_RPAD_DIRECTION(pad) (GST_REAL_PAD_CAST(pad)->direction)
287 #define GST_RPAD_CHAINFUNC(pad) (GST_REAL_PAD_CAST(pad)->chainfunc)
288 #define GST_RPAD_CHAINHANDLER(pad) (GST_REAL_PAD_CAST(pad)->chainhandler)
289 #define GST_RPAD_GETFUNC(pad) (GST_REAL_PAD_CAST(pad)->getfunc)
290 #define GST_RPAD_GETHANDLER(pad) (GST_REAL_PAD_CAST(pad)->gethandler)
291 #define GST_RPAD_EVENTFUNC(pad) (GST_REAL_PAD_CAST(pad)->eventfunc)
292 #define GST_RPAD_EVENTHANDLER(pad) (GST_REAL_PAD_CAST(pad)->eventhandler)
293 #define GST_RPAD_CONVERTFUNC(pad) (GST_REAL_PAD_CAST(pad)->convertfunc)
294 #define GST_RPAD_QUERYFUNC(pad) (GST_REAL_PAD_CAST(pad)->queryfunc)
295 #define GST_RPAD_INTLINKFUNC(pad) (GST_REAL_PAD_CAST(pad)->intlinkfunc)
296 #define GST_RPAD_FORMATSFUNC(pad) (GST_REAL_PAD_CAST(pad)->formatsfunc)
297 #define GST_RPAD_QUERYTYPEFUNC(pad) (GST_REAL_PAD_CAST(pad)->querytypefunc)
298 #define GST_RPAD_EVENTMASKFUNC(pad) (GST_REAL_PAD_CAST(pad)->eventmaskfunc)
300 #define GST_RPAD_PEER(pad) (GST_REAL_PAD_CAST(pad)->peer)
301 #define GST_RPAD_LINKFUNC(pad) (GST_REAL_PAD_CAST(pad)->linkfunc)
302 #define GST_RPAD_UNLINKFUNC(pad) (GST_REAL_PAD_CAST(pad)->unlinkfunc)
304 #define GST_RPAD_CAPS(pad) (GST_REAL_PAD_CAST(pad)->caps)
305 #define GST_RPAD_APPFILTER(pad) (GST_REAL_PAD_CAST(pad)->appfilter)
306 #define GST_RPAD_GETCAPSFUNC(pad) (GST_REAL_PAD_CAST(pad)->getcapsfunc)
307 #define GST_RPAD_FIXATEFUNC(pad) (GST_REAL_PAD_CAST(pad)->fixatefunc)
308 #define GST_RPAD_LINK(pad) (GST_REAL_PAD_CAST(pad)->link)
309 #define GST_RPAD_EXPLICIT_CAPS(pad) (GST_REAL_PAD_CAST(pad)->explicit_caps)
311 #define GST_RPAD_BUFFERALLOCFUNC(pad) (GST_REAL_PAD_CAST(pad)->bufferallocfunc)
313 #define GST_RPAD_IS_LINKED(pad) (GST_RPAD_PEER(pad) != NULL)
314 #define GST_RPAD_IS_ACTIVE(pad) (GST_FLAG_IS_SET (pad, GST_PAD_ACTIVE))
315 #define GST_RPAD_IS_USABLE(pad) (GST_RPAD_IS_LINKED (pad) && \
316 GST_RPAD_IS_ACTIVE(pad) && GST_RPAD_IS_ACTIVE(GST_RPAD_PEER (pad)))
317 #define GST_RPAD_IS_SRC(pad) (GST_RPAD_DIRECTION(pad) == GST_PAD_SRC)
318 #define GST_RPAD_IS_SINK(pad) (GST_RPAD_DIRECTION(pad) == GST_PAD_SINK)
321 #define GST_GPAD_REALPAD(pad) (((GstGhostPad *)(pad))->realpad)
324 #define GST_PAD_REALIZE(pad) (GST_IS_REAL_PAD(pad) ? ((GstRealPad *)(pad)) : GST_GPAD_REALPAD(pad))
325 #define GST_PAD_DIRECTION(pad) GST_RPAD_DIRECTION(GST_PAD_REALIZE(pad))
326 #define GST_PAD_CAPS(pad) (gst_pad_get_negotiated_caps(GST_PAD (pad)))
327 #define GST_PAD_PEER(pad) GST_PAD_CAST(GST_RPAD_PEER(GST_PAD_REALIZE(pad)))
329 /* Some check functions (unused?) */
330 #define GST_PAD_IS_LINKED(pad) (GST_RPAD_IS_LINKED(GST_PAD_REALIZE(pad)))
331 #define GST_PAD_IS_ACTIVE(pad) (GST_RPAD_IS_ACTIVE(GST_PAD_REALIZE(pad)))
332 #define GST_PAD_IS_NEGOTIATING(pad) (GST_FLAG_IS_SET (pad, GST_PAD_NEGOTIATING))
333 #define GST_PAD_IS_DISPATCHING(pad) (GST_FLAG_IS_SET (pad, GST_PAD_DISPATCHING))
334 #define GST_PAD_IS_USABLE(pad) (GST_RPAD_IS_USABLE(GST_PAD_REALIZE(pad)))
335 #define GST_PAD_CAN_PULL(pad) (GST_IS_REAL_PAD(pad) && GST_REAL_PAD(pad)->gethandler != NULL)
336 #define GST_PAD_IS_SRC(pad) (GST_RPAD_IS_SRC(GST_PAD_REALIZE(pad)))
337 #define GST_PAD_IS_SINK(pad) (GST_RPAD_IS_SINK(GST_PAD_REALIZE(pad)))
339 /***** PadTemplate *****/
340 #define GST_TYPE_PAD_TEMPLATE (gst_pad_template_get_type ())
341 #define GST_PAD_TEMPLATE(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_PAD_TEMPLATE,GstPadTemplate))
342 #define GST_PAD_TEMPLATE_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_PAD_TEMPLATE,GstPadTemplateClass))
343 #define GST_IS_PAD_TEMPLATE(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_PAD_TEMPLATE))
344 #define GST_IS_PAD_TEMPLATE_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_PAD_TEMPLATE))
352 #define GST_PAD_TEMPLATE_NAME_TEMPLATE(templ) (((GstPadTemplate *)(templ))->name_template)
353 #define GST_PAD_TEMPLATE_DIRECTION(templ) (((GstPadTemplate *)(templ))->direction)
354 #define GST_PAD_TEMPLATE_PRESENCE(templ) (((GstPadTemplate *)(templ))->presence)
355 #define GST_PAD_TEMPLATE_CAPS(templ) (((GstPadTemplate *)(templ))->caps)
358 GST_PAD_TEMPLATE_FIXED = GST_OBJECT_FLAG_LAST,
360 GST_PAD_TEMPLATE_FLAG_LAST = GST_OBJECT_FLAG_LAST + 4
361 } GstPadTemplateFlags;
363 #define GST_PAD_TEMPLATE_IS_FIXED(templ) (GST_FLAG_IS_SET(templ, GST_PAD_TEMPLATE_FIXED))
365 struct _GstPadTemplate {
368 gchar *name_template;
369 GstPadDirection direction;
370 GstPadPresence presence;
373 gpointer _gst_reserved[GST_PADDING];
376 struct _GstPadTemplateClass {
377 GstObjectClass parent_class;
379 /* signal callbacks */
380 void (*pad_created) (GstPadTemplate *templ, GstPad *pad);
382 gpointer _gst_reserved[GST_PADDING];
385 struct _GstStaticPadTemplate {
386 gchar *name_template;
387 GstPadDirection direction;
388 GstPadPresence presence;
389 GstStaticCaps static_caps;
392 #define GST_STATIC_PAD_TEMPLATE(padname, dir, pres, caps) \
394 /* name_template */ padname, \
395 /* direction */ dir, \
396 /* presence */ pres, \
401 GType gst_pad_get_type (void);
402 GType gst_real_pad_get_type (void);
403 GType gst_ghost_pad_get_type (void);
406 GstPad* gst_pad_new (const gchar *name, GstPadDirection direction);
407 GstPad* gst_pad_new_from_template (GstPadTemplate *templ, const gchar *name);
408 GstPad* gst_pad_custom_new (GType type, const gchar *name, GstPadDirection direction);
409 GstPad* gst_pad_custom_new_from_template (GType type, GstPadTemplate *templ, const gchar *name);
411 #define gst_pad_get_name(pad) gst_object_get_name(GST_OBJECT(pad))
412 #define gst_pad_set_name(pad,name) gst_object_set_name(GST_OBJECT(pad),name)
413 #define gst_pad_get_parent(pad) GST_ELEMENT(gst_object_get_parent(GST_OBJECT(pad)))
414 #define gst_pad_set_parent(pad,parent) gst_object_set_parent(GST_OBJECT(pad),parent)
415 GstElement* gst_pad_get_real_parent (GstPad *pad);
418 GstPadDirection gst_pad_get_direction (GstPad *pad);
420 gboolean gst_pad_set_active (GstPad *pad, gboolean active);
421 gboolean gst_pad_is_active (GstPad *pad);
423 void gst_pad_set_element_private (GstPad *pad, gpointer priv);
424 gpointer gst_pad_get_element_private (GstPad *pad);
426 GstScheduler* gst_pad_get_scheduler (GstPad *pad);
428 GstPadTemplate* gst_pad_get_pad_template (GstPad *pad);
430 void gst_pad_set_bufferalloc_function (GstPad *pad, GstPadBufferAllocFunction bufalloc);
431 GstBuffer* gst_pad_alloc_buffer (GstPad *pad, guint64 offset, gint size);
433 /* data passing setup functions */
434 void gst_pad_set_chain_function (GstPad *pad, GstPadChainFunction chain);
435 void gst_pad_set_get_function (GstPad *pad, GstPadGetFunction get);
436 void gst_pad_set_event_function (GstPad *pad, GstPadEventFunction event);
437 void gst_pad_set_event_mask_function (GstPad *pad, GstPadEventMaskFunction mask_func);
438 G_CONST_RETURN GstEventMask*
439 gst_pad_get_event_masks (GstPad *pad);
440 G_CONST_RETURN GstEventMask*
441 gst_pad_get_event_masks_default (GstPad *pad);
444 void gst_pad_set_link_function (GstPad *pad, GstPadLinkFunction link);
445 gboolean gst_pad_can_link (GstPad *srcpad, GstPad *sinkpad);
446 gboolean gst_pad_can_link_filtered (GstPad *srcpad, GstPad *sinkpad, const GstCaps *filtercaps);
447 void gst_pad_set_unlink_function (GstPad *pad, GstPadUnlinkFunction unlink);
449 gboolean gst_pad_link (GstPad *srcpad, GstPad *sinkpad);
450 gboolean gst_pad_link_filtered (GstPad *srcpad, GstPad *sinkpad, const GstCaps *filtercaps);
451 void gst_pad_unlink (GstPad *srcpad, GstPad *sinkpad);
452 gboolean gst_pad_is_linked (GstPad *pad);
454 GstPad* gst_pad_get_peer (GstPad *pad);
455 GstPad* gst_pad_realize (GstPad *pad);
457 /* capsnego functions */
458 void gst_pad_set_getcaps_function (GstPad *pad, GstPadGetCapsFunction getcaps);
459 void gst_pad_set_fixate_function (GstPad *pad, GstPadFixateFunction fixate);
460 GstCaps * gst_pad_proxy_getcaps (GstPad *pad);
461 GstCaps * gst_pad_proxy_fixate (GstPad *pad, const GstCaps *caps);
462 gboolean gst_pad_set_explicit_caps (GstPad *pad, const GstCaps *caps);
463 void gst_pad_use_explicit_caps (GstPad *pad);
464 gboolean gst_pad_relink_filtered (GstPad *srcpad, GstPad *sinkpad, const GstCaps *filtercaps);
465 GstPadLinkReturn gst_pad_renegotiate (GstPad *pad);
466 void gst_pad_unnegotiate (GstPad *pad);
467 gboolean gst_pad_try_relink_filtered (GstPad *srcpad, GstPad *sinkpad, const GstCaps *filtercaps);
468 void gst_pad_caps_change_notify (GstPad *pad);
470 gboolean gst_pad_recover_caps_error (GstPad *pad, const GstCaps *allowed);
472 G_CONST_RETURN GstCaps* gst_pad_get_pad_template_caps (GstPad *pad);
474 /* capsnego function for connected/unconnected pads */
475 GstCaps* gst_pad_get_caps (GstPad *pad);
476 gboolean gst_pad_set_caps (GstPad *pad, GstCaps *caps);
477 GstPadLinkReturn gst_pad_try_set_caps (GstPad *pad, const GstCaps *caps);
478 GstPadLinkReturn gst_pad_try_set_caps_nonfixed (GstPad *pad, const GstCaps *caps);
479 gboolean gst_pad_check_compatibility (GstPad *srcpad, GstPad *sinkpad);
481 GstCaps * gst_pad_peer_get_caps (GstPad * pad);
483 /* capsnego for connected pads */
484 GstCaps* gst_pad_get_allowed_caps (GstPad *pad);
485 G_CONST_RETURN GstCaps* gst_pad_get_negotiated_caps (GstPad *pad);
486 gboolean gst_pad_is_negotiated (GstPad *pad);
489 /* data passing functions */
490 void gst_pad_push (GstPad *pad, GstData *data);
491 GstData* gst_pad_pull (GstPad *pad);
492 gboolean gst_pad_send_event (GstPad *pad, GstEvent *event);
493 gboolean gst_pad_event_default (GstPad *pad, GstEvent *event);
494 /* FIXME 0.9: rename to _select? Otherwise rename SchedulerClass pointer */
495 GstData * gst_pad_collectv (GstPad **selected, const GList *padlist);
496 GstData * gst_pad_collect (GstPad **selected, GstPad *pad, ...);
497 GstData * gst_pad_collect_valist (GstPad **selected, GstPad *pad, va_list varargs);
499 /* convert/query/format functions */
500 void gst_pad_set_formats_function (GstPad *pad,
501 GstPadFormatsFunction formats);
502 G_CONST_RETURN GstFormat*
503 gst_pad_get_formats (GstPad *pad);
504 G_CONST_RETURN GstFormat*
505 gst_pad_get_formats_default (GstPad *pad);
507 void gst_pad_set_convert_function (GstPad *pad, GstPadConvertFunction convert);
508 gboolean gst_pad_convert (GstPad *pad,
509 GstFormat src_format, gint64 src_value,
510 GstFormat *dest_format, gint64 *dest_value);
511 gboolean gst_pad_convert_default (GstPad *pad,
512 GstFormat src_format, gint64 src_value,
513 GstFormat *dest_format, gint64 *dest_value);
515 void gst_pad_set_query_function (GstPad *pad, GstPadQueryFunction query);
516 void gst_pad_set_query_type_function (GstPad *pad, GstPadQueryTypeFunction type_func);
517 G_CONST_RETURN GstQueryType*
518 gst_pad_get_query_types (GstPad *pad);
519 G_CONST_RETURN GstQueryType*
520 gst_pad_get_query_types_default (GstPad *pad);
521 gboolean gst_pad_query (GstPad *pad, GstQueryType type,
522 GstFormat *format, gint64 *value);
523 gboolean gst_pad_query_default (GstPad *pad, GstQueryType type,
524 GstFormat *format, gint64 *value);
526 void gst_pad_set_internal_link_function (GstPad *pad, GstPadIntLinkFunction intlink);
527 GList* gst_pad_get_internal_links (GstPad *pad);
528 GList* gst_pad_get_internal_links_default (GstPad *pad);
530 /* misc helper functions */
531 gboolean gst_pad_dispatcher (GstPad *pad, GstPadDispatcherFunction dispatch,
535 #define gst_pad_add_probe(pad, probe) \
536 (gst_probe_dispatcher_add_probe (&(GST_PAD_REALIZE (pad)->probedisp), probe))
537 #define gst_pad_remove_probe(pad, probe) \
538 (gst_probe_dispatcher_remove_probe (&(GST_PAD_REALIZE (pad)->probedisp), probe))
540 #ifndef GST_DISABLE_LOADSAVE
541 void gst_pad_load_and_link (xmlNodePtr self, GstObject *parent);
546 GstPad* gst_ghost_pad_new (const gchar *name, GstPad *pad);
549 /* templates and factories */
550 GType gst_pad_template_get_type (void);
552 GstPadTemplate* gst_pad_template_new (const gchar *name_template,
553 GstPadDirection direction, GstPadPresence presence,
556 GstPadTemplate * gst_static_pad_template_get (GstStaticPadTemplate *pad_template);
557 const GstCaps* gst_pad_template_get_caps (GstPadTemplate *templ);
559 #ifndef GST_DISABLE_LOADSAVE
560 xmlNodePtr gst_ghost_pad_save_thyself (GstPad *pad,
564 /* for schedulers only */
565 void gst_pad_call_chain_function (GstPad *pad, GstData *data);
566 GstData * gst_pad_call_get_function (GstPad *pad);
570 #endif /* __GST_PAD_H__ */