mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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7c7a4b68a1
Original commit message from CVS: * check/gst/gstghostpad.c: (GST_START_TEST), (gst_ghost_pad_suite): Added some more tests for wrong hierarchy * docs/design/part-overview.txt: Some updates. * gst/gstbin.c: (gst_bin_remove_func), (gst_bin_dispose): Cleanups. * gst/gstelement.c: (gst_element_remove_pad), (gst_element_seek), (gst_element_dispose): Some more cleanups. * gst/gstpad.c: (gst_pad_link_check_compatible_unlocked), (gst_pad_link_check_hierarchy), (gst_pad_link_prepare), (gst_pad_get_caps_unlocked), (gst_pad_accept_caps), (gst_pad_set_caps), (gst_pad_send_event): Check for correct hierarchy when linking pads. Moving to strict requirement for ghostpads when linking elements in different bins. * gst/gstpad.h: Clean ups. Added WRONG_HIERARCHY return value.
500 lines
19 KiB
C
500 lines
19 KiB
C
/* GStreamer
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* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
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* 2000 Wim Taymans <wim.taymans@chello.be>
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*
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* gstpad.h: Header for GstPad object
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifndef __GST_PAD_H__
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#define __GST_PAD_H__
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#include <gst/gstconfig.h>
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#include <gst/gstobject.h>
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#include <gst/gstbuffer.h>
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#include <gst/gstcaps.h>
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#include <gst/gstevent.h>
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#include <gst/gstquery.h>
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#include <gst/gstqueryutils.h>
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#include <gst/gsttask.h>
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G_BEGIN_DECLS
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GST_EXPORT GType _gst_pad_type;
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/*
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* Pad base class
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*/
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#define GST_TYPE_PAD (_gst_pad_type)
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#define GST_IS_PAD(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_PAD))
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#define GST_IS_PAD_FAST(obj) (G_OBJECT_TYPE(obj) == GST_TYPE_PAD) /* necessary? */
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#define GST_IS_PAD_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_PAD))
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#define GST_PAD(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_PAD, GstPad))
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#define GST_PAD_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_PAD, GstPadClass))
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#define GST_PAD_CAST(obj) ((GstPad*)(obj))
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typedef struct _GstPad GstPad;
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typedef struct _GstPadClass GstPadClass;
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typedef struct _GstPadTemplate GstPadTemplate;
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typedef struct _GstPadTemplateClass GstPadTemplateClass;
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typedef struct _GstStaticPadTemplate GstStaticPadTemplate;
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/**
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* GstPadLinkReturn:
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* #GST_PAD_LINK_OK : link ok
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* #GST_PAD_LINK_WRONG_HIERARCHY: pads have no common grandparent
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* #GST_PAD_LINK_WAS_LINKED : pad was already linked
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* #GST_PAD_LINK_WRONG_DIRECTION: pads have wrong direction
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* #GST_PAD_LINK_NOFORMAT : pads do not have common format
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* #GST_PAD_LINK_NOSCHED : pads cannot cooperate in scheduling
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* #GST_PAD_LINK_REFUSED : refused for some reason
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*/
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typedef enum {
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GST_PAD_LINK_OK = 0,
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GST_PAD_LINK_WRONG_HIERARCHY = -1,
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GST_PAD_LINK_WAS_LINKED = -2,
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GST_PAD_LINK_WRONG_DIRECTION = -3,
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GST_PAD_LINK_NOFORMAT = -4,
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GST_PAD_LINK_NOSCHED = -5,
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GST_PAD_LINK_REFUSED = -6,
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} GstPadLinkReturn;
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#define GST_PAD_LINK_FAILED(ret) ((ret) < GST_PAD_LINK_OK)
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#define GST_PAD_LINK_SUCCESSFUL(ret) ((ret) >= GST_PAD_LINK_OK)
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typedef enum {
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GST_FLOW_RESEND = 1, /* resend buffer, possibly with new caps */
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GST_FLOW_OK = 0, /* data passing was ok */
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/* expected failures */
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GST_FLOW_NOT_LINKED = -1, /* pad is not linked */
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GST_FLOW_WRONG_STATE = -2, /* pad is in wrong state */
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/* error cases */
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GST_FLOW_UNEXPECTED = -3, /* did not expect anything, like after EOS */
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GST_FLOW_NOT_NEGOTIATED = -4, /* pad is not negotiated */
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GST_FLOW_ERROR = -5, /* some (fatal) error occured */
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GST_FLOW_NOT_SUPPORTED = -6 /* function not supported */
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} GstFlowReturn;
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#define GST_FLOW_IS_FATAL(ret) ((ret) <= GST_FLOW_UNEXPECTED)
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typedef enum {
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GST_ACTIVATE_NONE,
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GST_ACTIVATE_PUSH,
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GST_ACTIVATE_PULL,
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} GstActivateMode;
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#define GST_PAD_MODE_ACTIVATE(mode) ((mode) != GST_ACTIVATE_NONE)
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/* pad states */
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typedef gboolean (*GstPadActivateFunction) (GstPad *pad);
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typedef gboolean (*GstPadActivateModeFunction) (GstPad *pad, gboolean active);
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/* data passing */
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typedef GstFlowReturn (*GstPadChainFunction) (GstPad *pad, GstBuffer *buffer);
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typedef GstFlowReturn (*GstPadGetRangeFunction) (GstPad *pad, guint64 offset,
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guint length, GstBuffer **buffer);
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typedef gboolean (*GstPadEventFunction) (GstPad *pad, GstEvent *event);
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/* deprecate me, check range should use seeking query */
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typedef gboolean (*GstPadCheckGetRangeFunction) (GstPad *pad);
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/* internal links */
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typedef GList* (*GstPadIntLinkFunction) (GstPad *pad);
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/* generic query function */
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typedef const GstQueryType* (*GstPadQueryTypeFunction) (GstPad *pad);
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typedef gboolean (*GstPadQueryFunction) (GstPad *pad, GstQuery *query);
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/* linking */
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typedef GstPadLinkReturn (*GstPadLinkFunction) (GstPad *pad, GstPad *peer);
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typedef void (*GstPadUnlinkFunction) (GstPad *pad);
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/* caps nego */
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typedef GstCaps* (*GstPadGetCapsFunction) (GstPad *pad);
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typedef gboolean (*GstPadSetCapsFunction) (GstPad *pad, GstCaps *caps);
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typedef gboolean (*GstPadAcceptCapsFunction) (GstPad *pad, GstCaps *caps);
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typedef void (*GstPadFixateCapsFunction) (GstPad *pad, GstCaps *caps);
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typedef GstFlowReturn (*GstPadBufferAllocFunction) (GstPad *pad, guint64 offset, guint size,
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GstCaps *caps, GstBuffer **buf);
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/* misc */
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typedef gboolean (*GstPadDispatcherFunction) (GstPad *pad, gpointer data);
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typedef void (*GstPadBlockCallback) (GstPad *pad, gboolean blocked, gpointer user_data);
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typedef enum {
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GST_PAD_UNKNOWN,
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GST_PAD_SRC,
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GST_PAD_SINK
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} GstPadDirection;
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typedef enum {
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GST_PAD_BLOCKED = GST_OBJECT_FLAG_LAST,
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GST_PAD_FLUSHING,
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GST_PAD_IN_GETCAPS,
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GST_PAD_IN_SETCAPS,
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GST_PAD_FLAG_LAST = GST_OBJECT_FLAG_LAST + 8
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} GstPadFlags;
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struct _GstPad {
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GstObject object;
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gpointer element_private;
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GstPadTemplate *padtemplate;
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/* direction cannot change after creating the pad */
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GstPadDirection direction;
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/*< public >*/ /* with STREAM_LOCK */
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/* streaming rec_lock */
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GStaticRecMutex *stream_rec_lock;
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GstTask *task;
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/*< public >*/ /* with PREROLL_LOCK */
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GMutex *preroll_lock;
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GCond *preroll_cond;
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/*< public >*/ /* with LOCK */
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/* block cond, mutex is from the object */
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GCond *block_cond;
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GstPadBlockCallback block_callback;
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gpointer block_data;
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/* the pad capabilities */
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GstCaps *caps;
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GstPadGetCapsFunction getcapsfunc;
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GstPadSetCapsFunction setcapsfunc;
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GstPadAcceptCapsFunction acceptcapsfunc;
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GstPadFixateCapsFunction fixatecapsfunc;
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GstPadActivateFunction activatefunc;
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GstPadActivateModeFunction activatepushfunc;
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GstPadActivateModeFunction activatepullfunc;
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/* pad link */
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GstPadLinkFunction linkfunc;
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GstPadUnlinkFunction unlinkfunc;
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GstPad *peer;
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gpointer sched_private;
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/* data transport functions */
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GstPadChainFunction chainfunc;
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GstPadCheckGetRangeFunction checkgetrangefunc;
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GstPadGetRangeFunction getrangefunc;
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GstPadEventFunction eventfunc;
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GstActivateMode mode;
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/* generic query method */
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GstPadQueryTypeFunction querytypefunc;
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GstPadQueryFunction queryfunc;
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/* internal links */
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GstPadIntLinkFunction intlinkfunc;
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GstPadBufferAllocFunction bufferallocfunc;
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/* whether to emit signals for have-data. counts number
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* of handlers attached. */
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gint do_buffer_signals;
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gint do_event_signals;
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/*< private >*/
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gpointer _gst_reserved[GST_PADDING];
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};
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struct _GstPadClass {
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GstObjectClass parent_class;
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/* signal callbacks */
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void (*linked) (GstPad *pad, GstPad *peer);
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void (*unlinked) (GstPad *pad, GstPad *peer);
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void (*request_link) (GstPad *pad);
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gboolean (*have_data) (GstPad *pad, GstMiniObject *data);
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/*< private >*/
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gpointer _gst_reserved[GST_PADDING];
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};
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/***** helper macros *****/
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/* GstPad */
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#define GST_PAD_NAME(pad) (GST_OBJECT_NAME(pad))
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#define GST_PAD_PARENT(pad) (GST_ELEMENT_CAST(GST_OBJECT_PARENT(pad)))
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#define GST_PAD_ELEMENT_PRIVATE(pad) (GST_PAD_CAST(pad)->element_private)
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#define GST_PAD_PAD_TEMPLATE(pad) (GST_PAD_CAST(pad)->padtemplate)
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#define GST_PAD_DIRECTION(pad) (GST_PAD_CAST(pad)->direction)
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#define GST_PAD_TASK(pad) (GST_PAD_CAST(pad)->task)
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#define GST_PAD_ACTIVATE_MODE(pad) (GST_PAD_CAST(pad)->mode)
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#define GST_PAD_ACTIVATEFUNC(pad) (GST_PAD_CAST(pad)->activatefunc)
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#define GST_PAD_ACTIVATEPUSHFUNC(pad) (GST_PAD_CAST(pad)->activatepushfunc)
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#define GST_PAD_ACTIVATEPULLFUNC(pad) (GST_PAD_CAST(pad)->activatepullfunc)
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#define GST_PAD_CHAINFUNC(pad) (GST_PAD_CAST(pad)->chainfunc)
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#define GST_PAD_CHECKGETRANGEFUNC(pad) (GST_PAD_CAST(pad)->checkgetrangefunc)
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#define GST_PAD_GETRANGEFUNC(pad) (GST_PAD_CAST(pad)->getrangefunc)
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#define GST_PAD_EVENTFUNC(pad) (GST_PAD_CAST(pad)->eventfunc)
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#define GST_PAD_QUERYTYPEFUNC(pad) (GST_PAD_CAST(pad)->querytypefunc)
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#define GST_PAD_QUERYFUNC(pad) (GST_PAD_CAST(pad)->queryfunc)
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#define GST_PAD_INTLINKFUNC(pad) (GST_PAD_CAST(pad)->intlinkfunc)
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#define GST_PAD_PEER(pad) (GST_PAD_CAST(pad)->peer)
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#define GST_PAD_LINKFUNC(pad) (GST_PAD_CAST(pad)->linkfunc)
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#define GST_PAD_UNLINKFUNC(pad) (GST_PAD_CAST(pad)->unlinkfunc)
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#define GST_PAD_CAPS(pad) (GST_PAD_CAST(pad)->caps)
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#define GST_PAD_GETCAPSFUNC(pad) (GST_PAD_CAST(pad)->getcapsfunc)
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#define GST_PAD_SETCAPSFUNC(pad) (GST_PAD_CAST(pad)->setcapsfunc)
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#define GST_PAD_ACCEPTCAPSFUNC(pad) (GST_PAD_CAST(pad)->acceptcapsfunc)
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#define GST_PAD_FIXATECAPSFUNC(pad) (GST_PAD_CAST(pad)->fixatecapsfunc)
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#define GST_PAD_BUFFERALLOCFUNC(pad) (GST_PAD_CAST(pad)->bufferallocfunc)
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#define GST_PAD_DO_BUFFER_SIGNALS(pad) (GST_PAD_CAST(pad)->do_buffer_signals)
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#define GST_PAD_DO_EVENT_SIGNALS(pad) (GST_PAD_CAST(pad)->do_event_signals)
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#define GST_PAD_IS_LINKED(pad) (GST_PAD_PEER(pad) != NULL)
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#define GST_PAD_IS_BLOCKED(pad) (GST_FLAG_IS_SET (pad, GST_PAD_BLOCKED))
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#define GST_PAD_IS_FLUSHING(pad) (GST_FLAG_IS_SET (pad, GST_PAD_FLUSHING))
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#define GST_PAD_IS_IN_GETCAPS(pad) (GST_FLAG_IS_SET (pad, GST_PAD_IN_GETCAPS))
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#define GST_PAD_IS_IN_SETCAPS(pad) (GST_FLAG_IS_SET (pad, GST_PAD_IN_SETCAPS))
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#define GST_PAD_IS_USABLE(pad) (GST_PAD_IS_LINKED (pad) && \
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!GST_PAD_IS_FLUSHING(pad) && !GST_PAD_IS_FLUSHING(GST_PAD_PEER (pad)))
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#define GST_PAD_IS_SRC(pad) (GST_PAD_DIRECTION(pad) == GST_PAD_SRC)
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#define GST_PAD_IS_SINK(pad) (GST_PAD_DIRECTION(pad) == GST_PAD_SINK)
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#define GST_PAD_SET_FLUSHING(pad) (GST_FLAG_SET (pad, GST_PAD_FLUSHING))
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#define GST_PAD_UNSET_FLUSHING(pad) (GST_FLAG_UNSET (pad, GST_PAD_FLUSHING))
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#define GST_STREAM_GET_LOCK(pad) (GST_PAD_CAST(pad)->stream_rec_lock)
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#define GST_STREAM_LOCK(pad) (g_static_rec_mutex_lock(GST_STREAM_GET_LOCK(pad)))
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#define GST_STREAM_TRYLOCK(pad) (g_static_rec_mutex_trylock(GST_STREAM_GET_LOCK(pad)))
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#define GST_STREAM_UNLOCK(pad) (g_static_rec_mutex_unlock(GST_STREAM_GET_LOCK(pad)))
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#define GST_STREAM_UNLOCK_FULL(pad) (g_static_rec_mutex_unlock_full(GST_STREAM_GET_LOCK(pad)))
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#define GST_STREAM_LOCK_FULL(pad,t) (g_static_rec_mutex_lock_full(GST_STREAM_GET_LOCK(pad), t))
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#define GST_PREROLL_GET_LOCK(pad) (GST_PAD_CAST(pad)->preroll_lock)
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#define GST_PREROLL_LOCK(pad) (g_mutex_lock(GST_PREROLL_GET_LOCK(pad)))
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#define GST_PREROLL_TRYLOCK(pad) (g_mutex_trylock(GST_PREROLL_GET_LOCK(pad)))
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#define GST_PREROLL_UNLOCK(pad) (g_mutex_unlock(GST_PREROLL_GET_LOCK(pad)))
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#define GST_PREROLL_GET_COND(pad) (GST_PAD_CAST(pad)->preroll_cond)
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#define GST_PREROLL_WAIT(pad) g_cond_wait (GST_PREROLL_GET_COND (pad), GST_PREROLL_GET_LOCK (pad))
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#define GST_PREROLL_TIMED_WAIT(pad, timeval) g_cond_timed_wait (GST_PREROLL_GET_COND (pad), GST_PREROLL_GET_LOCK (pad),\
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timeval)
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#define GST_PREROLL_SIGNAL(pad) g_cond_signal (GST_PREROLL_GET_COND (pad));
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#define GST_PREROLL_BROADCAST(pad) g_cond_broadcast (GST_PREROLL_GET_COND (pad));
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#define GST_PAD_BLOCK_GET_COND(pad) (GST_PAD_CAST(pad)->block_cond)
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#define GST_PAD_BLOCK_WAIT(pad) (g_cond_wait(GST_PAD_BLOCK_GET_COND (pad), GST_GET_LOCK (pad)))
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#define GST_PAD_BLOCK_SIGNAL(pad) (g_cond_signal(GST_PAD_BLOCK_GET_COND (pad)))
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/***** PadTemplate *****/
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#define GST_TYPE_PAD_TEMPLATE (gst_pad_template_get_type ())
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#define GST_PAD_TEMPLATE(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_PAD_TEMPLATE,GstPadTemplate))
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#define GST_PAD_TEMPLATE_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_PAD_TEMPLATE,GstPadTemplateClass))
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#define GST_IS_PAD_TEMPLATE(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_PAD_TEMPLATE))
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#define GST_IS_PAD_TEMPLATE_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_PAD_TEMPLATE))
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typedef enum {
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GST_PAD_ALWAYS,
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GST_PAD_SOMETIMES,
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GST_PAD_REQUEST
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} GstPadPresence;
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#define GST_PAD_TEMPLATE_NAME_TEMPLATE(templ) (((GstPadTemplate *)(templ))->name_template)
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#define GST_PAD_TEMPLATE_DIRECTION(templ) (((GstPadTemplate *)(templ))->direction)
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#define GST_PAD_TEMPLATE_PRESENCE(templ) (((GstPadTemplate *)(templ))->presence)
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#define GST_PAD_TEMPLATE_CAPS(templ) (((GstPadTemplate *)(templ))->caps)
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typedef enum {
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GST_PAD_TEMPLATE_FIXED = GST_OBJECT_FLAG_LAST,
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GST_PAD_TEMPLATE_FLAG_LAST = GST_OBJECT_FLAG_LAST + 4
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} GstPadTemplateFlags;
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#define GST_PAD_TEMPLATE_IS_FIXED(templ) (GST_FLAG_IS_SET(templ, GST_PAD_TEMPLATE_FIXED))
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struct _GstPadTemplate {
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GstObject object;
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gchar *name_template;
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GstPadDirection direction;
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GstPadPresence presence;
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GstCaps *caps;
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gpointer _gst_reserved[GST_PADDING];
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};
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struct _GstPadTemplateClass {
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GstObjectClass parent_class;
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/* signal callbacks */
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void (*pad_created) (GstPadTemplate *templ, GstPad *pad);
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gpointer _gst_reserved[GST_PADDING];
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};
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struct _GstStaticPadTemplate {
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gchar *name_template;
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GstPadDirection direction;
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GstPadPresence presence;
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GstStaticCaps static_caps;
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};
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#define GST_STATIC_PAD_TEMPLATE(padname, dir, pres, caps) \
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{ \
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/* name_template */ padname, \
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/* direction */ dir, \
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/* presence */ pres, \
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/* caps */ caps \
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}
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GType gst_pad_get_type (void);
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/* creating pads */
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GstPad* gst_pad_new (const gchar *name, GstPadDirection direction);
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GstPad* gst_pad_new_from_template (GstPadTemplate *templ, const gchar *name);
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#define gst_pad_get_name(pad) gst_object_get_name (GST_OBJECT_CAST (pad))
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#define gst_pad_get_parent(pad) gst_object_get_parent (GST_OBJECT_CAST (pad))
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GstPadDirection gst_pad_get_direction (GstPad *pad);
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gboolean gst_pad_set_active (GstPad *pad, gboolean active);
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gboolean gst_pad_is_active (GstPad *pad);
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gboolean gst_pad_activate_pull (GstPad *pad, gboolean active);
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gboolean gst_pad_activate_push (GstPad *pad, gboolean active);
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gboolean gst_pad_set_blocked (GstPad *pad, gboolean blocked);
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gboolean gst_pad_set_blocked_async (GstPad *pad, gboolean blocked,
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GstPadBlockCallback callback, gpointer user_data);
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gboolean gst_pad_is_blocked (GstPad *pad);
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void gst_pad_set_element_private (GstPad *pad, gpointer priv);
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gpointer gst_pad_get_element_private (GstPad *pad);
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GstPadTemplate* gst_pad_get_pad_template (GstPad *pad);
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void gst_pad_set_bufferalloc_function (GstPad *pad, GstPadBufferAllocFunction bufalloc);
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GstFlowReturn gst_pad_alloc_buffer (GstPad *pad, guint64 offset, gint size,
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GstCaps *caps, GstBuffer **buf);
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/* data passing setup functions */
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void gst_pad_set_activate_function (GstPad *pad, GstPadActivateFunction activate);
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void gst_pad_set_activatepull_function (GstPad *pad, GstPadActivateModeFunction activatepull);
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void gst_pad_set_activatepush_function (GstPad *pad, GstPadActivateModeFunction activatepush);
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void gst_pad_set_chain_function (GstPad *pad, GstPadChainFunction chain);
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void gst_pad_set_getrange_function (GstPad *pad, GstPadGetRangeFunction get);
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void gst_pad_set_checkgetrange_function (GstPad *pad, GstPadCheckGetRangeFunction check);
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void gst_pad_set_event_function (GstPad *pad, GstPadEventFunction event);
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/* pad links */
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void gst_pad_set_link_function (GstPad *pad, GstPadLinkFunction link);
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void gst_pad_set_unlink_function (GstPad *pad, GstPadUnlinkFunction unlink);
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GstPadLinkReturn gst_pad_link (GstPad *srcpad, GstPad *sinkpad);
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gboolean gst_pad_unlink (GstPad *srcpad, GstPad *sinkpad);
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gboolean gst_pad_is_linked (GstPad *pad);
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GstPad* gst_pad_get_peer (GstPad *pad);
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/* capsnego functions */
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void gst_pad_set_getcaps_function (GstPad *pad, GstPadGetCapsFunction getcaps);
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void gst_pad_set_acceptcaps_function (GstPad *pad, GstPadAcceptCapsFunction acceptcaps);
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void gst_pad_set_fixatecaps_function (GstPad *pad, GstPadFixateCapsFunction fixatecaps);
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void gst_pad_set_setcaps_function (GstPad *pad, GstPadSetCapsFunction setcaps);
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G_CONST_RETURN GstCaps* gst_pad_get_pad_template_caps (GstPad *pad);
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/* capsnego function for connected/unconnected pads */
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GstCaps * gst_pad_get_caps (GstPad * pad);
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void gst_pad_fixate_caps (GstPad * pad, GstCaps *caps);
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gboolean gst_pad_accept_caps (GstPad * pad, GstCaps *caps);
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gboolean gst_pad_set_caps (GstPad * pad, GstCaps *caps);
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GstCaps * gst_pad_peer_get_caps (GstPad * pad);
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gboolean gst_pad_peer_accept_caps (GstPad * pad, GstCaps *caps);
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/* capsnego for connected pads */
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GstCaps * gst_pad_get_allowed_caps (GstPad * srcpad);
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GstCaps * gst_pad_get_negotiated_caps (GstPad * pad);
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/* data passing functions to peer */
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GstFlowReturn gst_pad_push (GstPad *pad, GstBuffer *buffer);
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gboolean gst_pad_check_pull_range (GstPad *pad);
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GstFlowReturn gst_pad_pull_range (GstPad *pad, guint64 offset, guint size,
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GstBuffer **buffer);
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gboolean gst_pad_push_event (GstPad *pad, GstEvent *event);
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gboolean gst_pad_event_default (GstPad *pad, GstEvent *event);
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/* data passing functions on pad */
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GstFlowReturn gst_pad_chain (GstPad *pad, GstBuffer *buffer);
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GstFlowReturn gst_pad_get_range (GstPad *pad, guint64 offset, guint size,
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GstBuffer **buffer);
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gboolean gst_pad_send_event (GstPad *pad, GstEvent *event);
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/* pad tasks */
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gboolean gst_pad_start_task (GstPad *pad, GstTaskFunction func,
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gpointer data);
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gboolean gst_pad_pause_task (GstPad *pad);
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gboolean gst_pad_stop_task (GstPad *pad);
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/* internal links */
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void gst_pad_set_internal_link_function (GstPad *pad, GstPadIntLinkFunction intlink);
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GList* gst_pad_get_internal_links (GstPad *pad);
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GList* gst_pad_get_internal_links_default (GstPad *pad);
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/* generic query function */
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void gst_pad_set_query_type_function (GstPad *pad, GstPadQueryTypeFunction type_func);
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G_CONST_RETURN GstQueryType*
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gst_pad_get_query_types (GstPad *pad);
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G_CONST_RETURN GstQueryType*
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gst_pad_get_query_types_default (GstPad *pad);
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gboolean gst_pad_query (GstPad *pad, GstQuery *query);
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void gst_pad_set_query_function (GstPad *pad, GstPadQueryFunction query);
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gboolean gst_pad_query_default (GstPad *pad, GstQuery *query);
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/* misc helper functions */
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gboolean gst_pad_dispatcher (GstPad *pad, GstPadDispatcherFunction dispatch,
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gpointer data);
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#ifndef GST_DISABLE_LOADSAVE
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void gst_pad_load_and_link (xmlNodePtr self, GstObject *parent);
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#endif
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/* templates and factories */
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GType gst_pad_template_get_type (void);
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GstPadTemplate* gst_pad_template_new (const gchar *name_template,
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GstPadDirection direction, GstPadPresence presence,
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GstCaps *caps);
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GstPadTemplate * gst_static_pad_template_get (GstStaticPadTemplate *pad_template);
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GstCaps* gst_static_pad_template_get_caps (GstStaticPadTemplate *templ);
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GstCaps* gst_pad_template_get_caps (GstPadTemplate *templ);
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G_END_DECLS
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#endif /* __GST_PAD_H__ */
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