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>
35 #include <gst/gstqueryutils.h>
36 #include <gst/gsttask.h>
41 GST_EXPORT GType _gst_pad_type;
42 GST_EXPORT GType _gst_real_pad_type;
43 GST_EXPORT GType _gst_ghost_pad_type;
48 #define GST_TYPE_PAD (_gst_pad_type)
49 #define GST_IS_PAD(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_PAD))
50 #define GST_IS_PAD_FAST(obj) (G_OBJECT_TYPE(obj) == GST_TYPE_REAL_PAD || \
51 G_OBJECT_TYPE(obj) == GST_TYPE_GHOST_PAD)
52 #define GST_IS_PAD_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_PAD))
53 #define GST_PAD(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_PAD, GstPad))
54 #define GST_PAD_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_PAD, GstPadClass))
55 #define GST_PAD_CAST(obj) ((GstPad*)(obj))
60 #define GST_TYPE_REAL_PAD (_gst_real_pad_type)
61 #define GST_IS_REAL_PAD(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_REAL_PAD))
62 #define GST_IS_REAL_PAD_FAST(obj) (G_OBJECT_TYPE(obj) == GST_TYPE_REAL_PAD)
63 #define GST_IS_REAL_PAD_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_REAL_PAD))
64 #define GST_REAL_PAD(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_REAL_PAD, GstRealPad))
65 #define GST_REAL_PAD_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_REAL_PAD, GstRealPadClass))
66 #define GST_REAL_PAD_CAST(obj) ((GstRealPad*)(obj))
71 #define GST_TYPE_GHOST_PAD (_gst_ghost_pad_type)
72 #define GST_IS_GHOST_PAD(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_GHOST_PAD))
73 #define GST_IS_GHOST_PAD_FAST(obj) (G_OBJECT_TYPE(obj) == GST_TYPE_GHOST_PAD)
74 #define GST_IS_GHOST_PAD_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_GHOST_PAD))
75 #define GST_GHOST_PAD(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_GHOST_PAD, GstGhostPad))
76 #define GST_GHOST_PAD_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_GHOST_PAD, GstGhostPadClass))
77 #define GST_GHOST_PAD_CAST(obj) ((GstGhostPad*)(obj))
80 /*typedef struct _GstPad GstPad; */
81 /*typedef struct _GstPadClass GstPadClass;*/
82 typedef struct _GstRealPad GstRealPad;
83 typedef struct _GstRealPadClass GstRealPadClass;
84 typedef struct _GstGhostPad GstGhostPad;
85 typedef struct _GstGhostPadClass GstGhostPadClass;
86 /*typedef struct _GstPadTemplate GstPadTemplate;*/
87 /*typedef struct _GstPadTemplateClass GstPadTemplateClass;*/
88 typedef struct _GstStaticPadTemplate GstStaticPadTemplate;
89 typedef struct _GstPadLink GstPadLink;
92 GST_PAD_LINK_NOSCHED = -5, /* pads cannot cooperate in scheduling */
93 GST_PAD_LINK_NOFORMAT = -4, /* pads do not have common format */
94 GST_PAD_LINK_REFUSED = -3, /* refused for some reason */
95 GST_PAD_LINK_WRONG_DIRECTION = -2, /* pads have wrong direction */
96 GST_PAD_LINK_WAS_LINKED = -1, /* pad was already linked */
97 GST_PAD_LINK_OK = 0, /* link ok */
100 #define GST_PAD_LINK_FAILED(ret) ((ret) < GST_PAD_LINK_OK)
101 #define GST_PAD_LINK_SUCCESSFUL(ret) ((ret) >= GST_PAD_LINK_OK)
104 GST_FLOW_OK = 0, /* data passing was ok */
105 GST_FLOW_RESEND = 1, /* resend buffer, possibly with new caps */
106 GST_FLOW_ERROR = -1, /* some (fatal) error occured */
107 GST_FLOW_NOT_CONNECTED = -2, /* pad is not connected */
108 GST_FLOW_NOT_NEGOTIATED = -3, /* pad is not negotiated */
109 GST_FLOW_WRONG_STATE = -4, /* pad is in wrong state */
110 GST_FLOW_UNEXPECTED = -5, /* did not expect anything, this is not fatal */
111 GST_FLOW_NOT_SUPPORTED = -6 /* function not supported */
120 #define GST_PAD_MODE_ACTIVATE(mode) ((mode) != GST_ACTIVATE_NONE)
122 /* convenience functions */
123 #ifdef G_HAVE_ISO_VARARGS
124 #define GST_PAD_QUERY_TYPE_FUNCTION(functionname, ...) GST_QUERY_TYPE_FUNCTION (GstPad *, functionname, __VA_ARGS__);
125 #define GST_PAD_FORMATS_FUNCTION(functionname, ...) GST_FORMATS_FUNCTION (GstPad *, functionname, __VA_ARGS__);
126 #define GST_PAD_EVENT_MASK_FUNCTION(functionname, ...) GST_EVENT_MASK_FUNCTION (GstPad *, functionname, __VA_ARGS__);
127 #elif defined(G_HAVE_GNUC_VARARGS)
128 #define GST_PAD_QUERY_TYPE_FUNCTION(functionname, a...) GST_QUERY_TYPE_FUNCTION (GstPad *, functionname, a);
129 #define GST_PAD_FORMATS_FUNCTION(functionname, a...) GST_FORMATS_FUNCTION (GstPad *, functionname, a);
130 #define GST_PAD_EVENT_MASK_FUNCTION(functionname, a...) GST_EVENT_MASK_FUNCTION (GstPad *, functionname, a);
135 typedef gboolean (*GstPadActivateFunction) (GstPad *pad, GstActivateMode mode);
138 typedef GstFlowReturn (*GstPadChainFunction) (GstPad *pad, GstBuffer *buffer);
139 typedef GstFlowReturn (*GstPadGetRangeFunction) (GstPad *pad, guint64 offset,
140 guint length, GstBuffer **buffer);
141 typedef gboolean (*GstPadEventFunction) (GstPad *pad, GstEvent *event);
143 /* deprecate me, check range should use seeking query, loop function is internal */
144 typedef gboolean (*GstPadCheckGetRangeFunction) (GstPad *pad);
145 typedef void (*GstPadLoopFunction) (GstPad *pad);
148 typedef GList* (*GstPadIntLinkFunction) (GstPad *pad);
150 /* generic query function */
151 typedef const GstQueryType* (*GstPadQueryTypeFunction) (GstPad *pad);
152 typedef gboolean (*GstPadQueryFunction) (GstPad *pad, GstQuery *query);
155 typedef GstPadLinkReturn (*GstPadLinkFunction) (GstPad *pad, GstPad *peer);
156 typedef void (*GstPadUnlinkFunction) (GstPad *pad);
159 typedef GstCaps* (*GstPadGetCapsFunction) (GstPad *pad);
160 typedef gboolean (*GstPadSetCapsFunction) (GstPad *pad, GstCaps *caps);
161 typedef gboolean (*GstPadAcceptCapsFunction) (GstPad *pad, GstCaps *caps);
162 typedef GstCaps* (*GstPadFixateCapsFunction) (GstPad *pad, GstCaps *caps);
163 typedef GstBuffer* (*GstPadBufferAllocFunction) (GstPad *pad, guint64 offset, guint size,
166 typedef gboolean (*GstPadDispatcherFunction) (GstPad *pad, gpointer data);
168 typedef void (*GstPadBlockCallback) (GstPad *pad, gboolean blocked, gpointer user_data);
177 GST_PAD_BLOCKED = GST_OBJECT_FLAG_LAST,
182 GST_PAD_FLAG_LAST = GST_OBJECT_FLAG_LAST + 8
188 gpointer element_private;
190 GstPadTemplate *padtemplate; /* the template for this pad */
192 gpointer _gst_reserved[GST_PADDING];
195 struct _GstPadClass {
196 GstObjectClass parent_class;
198 gpointer _gst_reserved[GST_PADDING];
204 /* direction cannot change after creating the pad */
205 GstPadDirection direction;
207 /*< public >*/ /* with STREAM_LOCK */
208 /* streaming rec_lock */
209 GStaticRecMutex *stream_rec_lock;
211 /*< public >*/ /* with PREROLL_LOCK */
212 GMutex *preroll_lock;
215 /*< public >*/ /* with LOCK */
216 /* block cond, mutex is from the object */
218 GstPadBlockCallback block_callback;
221 /* the pad capabilities */
223 GstPadGetCapsFunction getcapsfunc;
224 GstPadSetCapsFunction setcapsfunc;
225 GstPadAcceptCapsFunction acceptcapsfunc;
226 GstPadFixateCapsFunction fixatecapsfunc;
228 GstPadActivateFunction activatefunc;
231 GstPadLinkFunction linkfunc;
232 GstPadUnlinkFunction unlinkfunc;
235 gpointer sched_private;
237 /* data transport functions */
238 GstPadLoopFunction loopfunc;
239 GstPadChainFunction chainfunc;
240 GstPadCheckGetRangeFunction checkgetrangefunc;
241 GstPadGetRangeFunction getrangefunc;
242 GstPadEventFunction eventfunc;
244 GstActivateMode mode;
248 guint32 ghostpads_cookie;
250 /* generic query method */
251 GstPadQueryTypeFunction querytypefunc;
252 GstPadQueryFunction queryfunc;
255 GstPadIntLinkFunction intlinkfunc;
257 GstPadBufferAllocFunction bufferallocfunc;
259 GstProbeDispatcher probedisp;
262 gpointer _gst_reserved[GST_PADDING];
265 struct _GstRealPadClass {
266 GstPadClass parent_class;
268 /* signal callbacks */
269 void (*linked) (GstPad *pad, GstPad *peer);
270 void (*unlinked) (GstPad *pad, GstPad *peer);
271 void (*request_link) (GstPad *pad);
274 gpointer _gst_reserved[GST_PADDING];
277 struct _GstGhostPad {
282 gpointer _gst_reserved[GST_PADDING];
285 struct _GstGhostPadClass {
286 GstPadClass parent_class;
288 gpointer _gst_reserved[GST_PADDING];
292 /***** helper macros *****/
294 #define GST_PAD_NAME(pad) (GST_OBJECT_NAME(pad))
295 #define GST_PAD_PARENT(pad) (GST_ELEMENT_CAST(GST_OBJECT_PARENT(pad)))
296 #define GST_PAD_ELEMENT_PRIVATE(pad) (GST_PAD_CAST(pad)->element_private)
297 #define GST_PAD_PAD_TEMPLATE(pad) (GST_PAD_CAST(pad)->padtemplate)
300 #define GST_RPAD_DIRECTION(pad) (GST_REAL_PAD_CAST(pad)->direction)
301 #define GST_RPAD_TASK(pad) (GST_REAL_PAD_CAST(pad)->task)
302 #define GST_RPAD_ACTIVATEFUNC(pad) (GST_REAL_PAD_CAST(pad)->activatefunc)
303 #define GST_RPAD_LOOPFUNC(pad) (GST_REAL_PAD_CAST(pad)->loopfunc)
304 #define GST_RPAD_CHAINFUNC(pad) (GST_REAL_PAD_CAST(pad)->chainfunc)
305 #define GST_RPAD_CHECKGETRANGEFUNC(pad) (GST_REAL_PAD_CAST(pad)->checkgetrangefunc)
306 #define GST_RPAD_GETRANGEFUNC(pad) (GST_REAL_PAD_CAST(pad)->getrangefunc)
307 #define GST_RPAD_EVENTFUNC(pad) (GST_REAL_PAD_CAST(pad)->eventfunc)
308 #define GST_RPAD_ACTIVATE_MODE(pad) (GST_REAL_PAD_CAST(pad)->mode)
309 #define GST_RPAD_QUERYTYPEFUNC(pad) (GST_REAL_PAD_CAST(pad)->querytypefunc)
310 #define GST_RPAD_QUERYFUNC(pad) (GST_REAL_PAD_CAST(pad)->queryfunc)
311 #define GST_RPAD_INTLINKFUNC(pad) (GST_REAL_PAD_CAST(pad)->intlinkfunc)
313 #define GST_RPAD_PEER(pad) (GST_REAL_PAD_CAST(pad)->peer)
314 #define GST_RPAD_LINKFUNC(pad) (GST_REAL_PAD_CAST(pad)->linkfunc)
315 #define GST_RPAD_UNLINKFUNC(pad) (GST_REAL_PAD_CAST(pad)->unlinkfunc)
317 #define GST_RPAD_CAPS(pad) (GST_REAL_PAD_CAST(pad)->caps)
318 #define GST_RPAD_GETCAPSFUNC(pad) (GST_REAL_PAD_CAST(pad)->getcapsfunc)
319 #define GST_RPAD_SETCAPSFUNC(pad) (GST_REAL_PAD_CAST(pad)->setcapsfunc)
320 #define GST_RPAD_ACCEPTCAPSFUNC(pad) (GST_REAL_PAD_CAST(pad)->acceptcapsfunc)
321 #define GST_RPAD_FIXATECAPSFUNC(pad) (GST_REAL_PAD_CAST(pad)->fixatecapsfunc)
323 #define GST_RPAD_BUFFERALLOCFUNC(pad) (GST_REAL_PAD_CAST(pad)->bufferallocfunc)
325 #define GST_RPAD_IS_LINKED(pad) (GST_RPAD_PEER(pad) != NULL)
326 #define GST_RPAD_IS_BLOCKED(pad) (GST_FLAG_IS_SET (pad, GST_PAD_BLOCKED))
327 #define GST_RPAD_IS_FLUSHING(pad) (GST_FLAG_IS_SET (pad, GST_PAD_FLUSHING))
328 #define GST_RPAD_IS_IN_GETCAPS(pad) (GST_FLAG_IS_SET (pad, GST_PAD_IN_GETCAPS))
329 #define GST_RPAD_IS_IN_SETCAPS(pad) (GST_FLAG_IS_SET (pad, GST_PAD_IN_SETCAPS))
330 #define GST_RPAD_IS_USABLE(pad) (GST_RPAD_IS_LINKED (pad) && \
331 !GST_RPAD_IS_FLUSHING(pad) && !GST_RPAD_IS_FLUSHING(GST_RPAD_PEER (pad)))
332 #define GST_RPAD_IS_SRC(pad) (GST_RPAD_DIRECTION(pad) == GST_PAD_SRC)
333 #define GST_RPAD_IS_SINK(pad) (GST_RPAD_DIRECTION(pad) == GST_PAD_SINK)
335 #define GST_RPAD_SET_FLUSHING(pad) (GST_FLAG_SET (pad, GST_PAD_FLUSHING))
336 #define GST_RPAD_UNSET_FLUSHING(pad) (GST_FLAG_UNSET (pad, GST_PAD_FLUSHING))
338 #define GST_STREAM_GET_LOCK(pad) (GST_PAD_REALIZE(pad)->stream_rec_lock)
339 #define GST_STREAM_LOCK(pad) (g_static_rec_mutex_lock(GST_STREAM_GET_LOCK(pad)))
340 #define GST_STREAM_TRYLOCK(pad) (g_static_rec_mutex_trylock(GST_STREAM_GET_LOCK(pad)))
341 #define GST_STREAM_UNLOCK(pad) (g_static_rec_mutex_unlock(GST_STREAM_GET_LOCK(pad)))
343 #define GST_PREROLL_GET_LOCK(pad) (GST_PAD_REALIZE(pad)->preroll_lock)
344 #define GST_PREROLL_LOCK(pad) (g_mutex_lock(GST_PREROLL_GET_LOCK(pad)))
345 #define GST_PREROLL_TRYLOCK(pad) (g_mutex_trylock(GST_PREROLL_GET_LOCK(pad)))
346 #define GST_PREROLL_UNLOCK(pad) (g_mutex_unlock(GST_PREROLL_GET_LOCK(pad)))
347 #define GST_PREROLL_GET_COND(pad) (GST_PAD_REALIZE(pad)->preroll_cond)
348 #define GST_PREROLL_WAIT(pad) g_cond_wait (GST_PREROLL_GET_COND (pad), GST_PREROLL_GET_LOCK (pad))
349 #define GST_PREROLL_TIMED_WAIT(pad, timeval) g_cond_timed_wait (GST_PREROLL_GET_COND (pad), GST_PREROLL_GET_LOCK (pad),\
351 #define GST_PREROLL_SIGNAL(pad) g_cond_signal (GST_PREROLL_GET_COND (pad));
352 #define GST_PREROLL_BROADCAST(pad) g_cond_broadcast (GST_PREROLL_GET_COND (pad));
354 #define GST_PAD_BLOCK_GET_COND(pad) (GST_PAD_REALIZE(pad)->block_cond)
355 #define GST_PAD_BLOCK_WAIT(pad) (g_cond_wait(GST_PAD_BLOCK_GET_COND (pad), GST_GET_LOCK (pad)))
356 #define GST_PAD_BLOCK_SIGNAL(pad) (g_cond_signal(GST_PAD_BLOCK_GET_COND (pad)))
359 #define GST_GPAD_REALPAD(pad) (((GstGhostPad *)(pad))->realpad)
361 /* Generic, be VERY carefull with these macros as the ghostpad could be lost */
362 #define GST_PAD_REALIZE(pad) (GST_IS_REAL_PAD(pad) ? ((GstRealPad *)(pad)) : GST_GPAD_REALPAD(pad))
363 #define GST_PAD_DIRECTION(pad) GST_RPAD_DIRECTION(GST_PAD_REALIZE(pad))
364 #define GST_PAD_CAPS(pad) GST_RPAD_CAPS(GST_PAD_REALIZE (pad))
365 #define GST_PAD_PEER(pad) GST_PAD_CAST(GST_RPAD_PEER(GST_PAD_REALIZE(pad)))
367 #define GST_PAD_TASK(pad) GST_RPAD_TASK(pad)
369 /* Some check functions (unused?) */
370 #define GST_PAD_IS_LINKED(pad) (GST_RPAD_IS_LINKED(GST_PAD_REALIZE(pad)))
371 #define GST_PAD_IS_BLOCKED(pad) (GST_RPAD_IS_BLOCKED(GST_PAD_REALIZE(pad)))
372 #define GST_PAD_IS_FLUSHING(pad) (GST_RPAD_IS_FLUSHING(GST_PAD_REALIZE(pad)))
373 #define GST_PAD_IS_IN_GETCAPS(pad) (GST_RPAD_IS_IN_GETCAPS(GST_PAD_REALIZE(pad)))
374 #define GST_PAD_IS_IN_SETCAPS(pad) (GST_RPAD_IS_IN_SETCAPS(GST_PAD_REALIZE(pad)))
375 #define GST_PAD_IS_USABLE(pad) (GST_RPAD_IS_USABLE(GST_PAD_REALIZE(pad)))
376 #define GST_PAD_IS_SRC(pad) (GST_RPAD_IS_SRC(GST_PAD_REALIZE(pad)))
377 #define GST_PAD_IS_SINK(pad) (GST_RPAD_IS_SINK(GST_PAD_REALIZE(pad)))
379 /***** PadTemplate *****/
380 #define GST_TYPE_PAD_TEMPLATE (gst_pad_template_get_type ())
381 #define GST_PAD_TEMPLATE(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_PAD_TEMPLATE,GstPadTemplate))
382 #define GST_PAD_TEMPLATE_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_PAD_TEMPLATE,GstPadTemplateClass))
383 #define GST_IS_PAD_TEMPLATE(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_PAD_TEMPLATE))
384 #define GST_IS_PAD_TEMPLATE_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_PAD_TEMPLATE))
392 #define GST_PAD_TEMPLATE_NAME_TEMPLATE(templ) (((GstPadTemplate *)(templ))->name_template)
393 #define GST_PAD_TEMPLATE_DIRECTION(templ) (((GstPadTemplate *)(templ))->direction)
394 #define GST_PAD_TEMPLATE_PRESENCE(templ) (((GstPadTemplate *)(templ))->presence)
395 #define GST_PAD_TEMPLATE_CAPS(templ) (((GstPadTemplate *)(templ))->caps)
398 GST_PAD_TEMPLATE_FIXED = GST_OBJECT_FLAG_LAST,
400 GST_PAD_TEMPLATE_FLAG_LAST = GST_OBJECT_FLAG_LAST + 4
401 } GstPadTemplateFlags;
403 #define GST_PAD_TEMPLATE_IS_FIXED(templ) (GST_FLAG_IS_SET(templ, GST_PAD_TEMPLATE_FIXED))
405 struct _GstPadTemplate {
408 gchar *name_template;
409 GstPadDirection direction;
410 GstPadPresence presence;
413 gpointer _gst_reserved[GST_PADDING];
416 struct _GstPadTemplateClass {
417 GstObjectClass parent_class;
419 /* signal callbacks */
420 void (*pad_created) (GstPadTemplate *templ, GstPad *pad);
422 gpointer _gst_reserved[GST_PADDING];
425 struct _GstStaticPadTemplate {
426 gchar *name_template;
427 GstPadDirection direction;
428 GstPadPresence presence;
429 GstStaticCaps static_caps;
432 #define GST_STATIC_PAD_TEMPLATE(padname, dir, pres, caps) \
434 /* name_template */ padname, \
435 /* direction */ dir, \
436 /* presence */ pres, \
441 GType gst_pad_get_type (void);
442 GType gst_real_pad_get_type (void);
443 GType gst_ghost_pad_get_type (void);
446 GstPad* gst_pad_new (const gchar *name, GstPadDirection direction);
447 GstPad* gst_pad_new_from_template (GstPadTemplate *templ, const gchar *name);
448 GstPad* gst_pad_custom_new (GType type, const gchar *name, GstPadDirection direction);
449 GstPad* gst_pad_custom_new_from_template (GType type, GstPadTemplate *templ, const gchar *name);
451 #define gst_pad_get_name(pad) gst_object_get_name(GST_OBJECT(pad))
452 #define gst_pad_set_name(pad,name) gst_object_set_name(GST_OBJECT(pad),name)
453 #define gst_pad_get_parent(pad) GST_ELEMENT(gst_object_get_parent(GST_OBJECT(pad)))
454 #define gst_pad_set_parent(pad,parent) gst_object_set_parent(GST_OBJECT(pad),parent)
455 GstElement* gst_pad_get_real_parent (GstPad *pad);
458 GstPadDirection gst_pad_get_direction (GstPad *pad);
460 gboolean gst_pad_set_active (GstPad *pad, GstActivateMode mode);
461 gboolean gst_pad_peer_set_active (GstPad *pad, GstActivateMode mode);
462 gboolean gst_pad_is_active (GstPad *pad);
463 gboolean gst_pad_set_blocked (GstPad *pad, gboolean blocked);
464 gboolean gst_pad_set_blocked_async (GstPad *pad, gboolean blocked,
465 GstPadBlockCallback callback, gpointer user_data);
466 gboolean gst_pad_is_blocked (GstPad *pad);
468 void gst_pad_set_element_private (GstPad *pad, gpointer priv);
469 gpointer gst_pad_get_element_private (GstPad *pad);
471 GstPadTemplate* gst_pad_get_pad_template (GstPad *pad);
473 void gst_pad_set_bufferalloc_function (GstPad *pad, GstPadBufferAllocFunction bufalloc);
474 GstBuffer* gst_pad_alloc_buffer (GstPad *pad, guint64 offset, gint size,
477 /* data passing setup functions */
478 void gst_pad_set_activate_function (GstPad *pad, GstPadActivateFunction activate);
479 void gst_pad_set_loop_function (GstPad *pad, GstPadLoopFunction loop);
480 void gst_pad_set_chain_function (GstPad *pad, GstPadChainFunction chain);
481 void gst_pad_set_getrange_function (GstPad *pad, GstPadGetRangeFunction get);
482 void gst_pad_set_checkgetrange_function (GstPad *pad, GstPadCheckGetRangeFunction check);
483 void gst_pad_set_event_function (GstPad *pad, GstPadEventFunction event);
486 void gst_pad_set_link_function (GstPad *pad, GstPadLinkFunction link);
487 void gst_pad_set_unlink_function (GstPad *pad, GstPadUnlinkFunction unlink);
489 GstPadLinkReturn gst_pad_link (GstPad *srcpad, GstPad *sinkpad);
490 gboolean gst_pad_unlink (GstPad *srcpad, GstPad *sinkpad);
491 gboolean gst_pad_is_linked (GstPad *pad);
493 GstPad* gst_pad_get_peer (GstPad *pad);
494 GstPad* gst_pad_realize (GstPad *pad);
496 /* capsnego functions */
497 void gst_pad_set_getcaps_function (GstPad *pad, GstPadGetCapsFunction getcaps);
498 void gst_pad_set_acceptcaps_function (GstPad *pad, GstPadAcceptCapsFunction acceptcaps);
499 void gst_pad_set_fixatecaps_function (GstPad *pad, GstPadFixateCapsFunction fixatecaps);
500 void gst_pad_set_setcaps_function (GstPad *pad, GstPadSetCapsFunction setcaps);
502 G_CONST_RETURN GstCaps* gst_pad_get_pad_template_caps (GstPad *pad);
504 /* capsnego function for connected/unconnected pads */
505 GstCaps * gst_pad_get_caps (GstPad * pad);
506 GstCaps* gst_pad_fixate_caps (GstPad * pad, GstCaps *caps);
507 gboolean gst_pad_accept_caps (GstPad * pad, GstCaps *caps);
508 gboolean gst_pad_set_caps (GstPad * pad, GstCaps *caps);
510 GstCaps * gst_pad_peer_get_caps (GstPad * pad);
511 gboolean gst_pad_peer_accept_caps (GstPad * pad, GstCaps *caps);
513 /* capsnego for connected pads */
514 GstCaps * gst_pad_get_allowed_caps (GstPad * srcpad);
515 GstCaps * gst_pad_get_negotiated_caps (GstPad * pad);
517 /* data passing functions to peer */
518 GstFlowReturn gst_pad_push (GstPad *pad, GstBuffer *buffer);
519 gboolean gst_pad_check_pull_range (GstPad *pad);
520 GstFlowReturn gst_pad_pull_range (GstPad *pad, guint64 offset, guint size,
522 gboolean gst_pad_push_event (GstPad *pad, GstEvent *event);
523 gboolean gst_pad_event_default (GstPad *pad, GstEvent *event);
525 /* data passing functions on pad */
526 GstFlowReturn gst_pad_chain (GstPad *pad, GstBuffer *buffer);
527 GstFlowReturn gst_pad_get_range (GstPad *pad, guint64 offset, guint size,
529 gboolean gst_pad_send_event (GstPad *pad, GstEvent *event);
532 gboolean gst_pad_start_task (GstPad *pad, GstTaskFunction func,
534 gboolean gst_pad_pause_task (GstPad *pad);
535 gboolean gst_pad_stop_task (GstPad *pad);
538 void gst_pad_set_internal_link_function (GstPad *pad, GstPadIntLinkFunction intlink);
539 GList* gst_pad_get_internal_links (GstPad *pad);
540 GList* gst_pad_get_internal_links_default (GstPad *pad);
542 /* generic query function */
543 void gst_pad_set_query_type_function (GstPad *pad, GstPadQueryTypeFunction type_func);
544 G_CONST_RETURN GstQueryType*
545 gst_pad_get_query_types (GstPad *pad);
546 G_CONST_RETURN GstQueryType*
547 gst_pad_get_query_types_default (GstPad *pad);
549 gboolean gst_pad_query (GstPad *pad, GstQuery *query);
550 void gst_pad_set_query_function (GstPad *pad, GstPadQueryFunction query);
551 gboolean gst_pad_query_default (GstPad *pad, GstQuery *query);
553 /* misc helper functions */
554 gboolean gst_pad_dispatcher (GstPad *pad, GstPadDispatcherFunction dispatch,
558 #define gst_pad_add_probe(pad, probe) \
559 (gst_probe_dispatcher_add_probe (&(GST_PAD_REALIZE (pad)->probedisp), probe))
560 #define gst_pad_remove_probe(pad, probe) \
561 (gst_probe_dispatcher_remove_probe (&(GST_PAD_REALIZE (pad)->probedisp), probe))
563 #ifndef GST_DISABLE_LOADSAVE
564 void gst_pad_load_and_link (xmlNodePtr self, GstObject *parent);
569 GstPad* gst_ghost_pad_new (const gchar *name, GstPad *pad);
572 /* templates and factories */
573 GType gst_pad_template_get_type (void);
575 GstPadTemplate* gst_pad_template_new (const gchar *name_template,
576 GstPadDirection direction, GstPadPresence presence,
579 GstPadTemplate * gst_static_pad_template_get (GstStaticPadTemplate *pad_template);
580 GstCaps* gst_static_pad_template_get_caps (GstStaticPadTemplate *templ);
581 GstCaps* gst_pad_template_get_caps (GstPadTemplate *templ);
583 #ifndef GST_DISABLE_LOADSAVE
584 xmlNodePtr gst_ghost_pad_save_thyself (GstPad *pad,
591 #endif /* __GST_PAD_H__ */