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gstreamer/gst/gstpad.h
Andy Wingo d6443170cf gst/gsttag.c: Add a tag merge func for pointers. The header was there all along, but the function wasn't. (guile-gstr... 
Original commit message from CVS:
2004-07-14  Andy Wingo  <wingo@pobox.com>

* gst/gsttag.c: Add a tag merge func for pointers. The header was
there all along, but the function wasn't. (guile-gstreamer's build
system uses the address of the function -- I wasn't actually
trying to use this.)

2004-07-13  Andy Wingo  <wingo@pobox.com>

* gst/gstpad.c (gst_pad_try_set_caps): Naive link functions (such
as gst_pad_proxy_pad_link) just link to every other pad when they
are called. In the case where the graph has cycles, this will mean
that a call to try_set_caps will recurse. Allow this recursion
and return OK, while we wait for the first try_set_caps to give a
proper return value.
(gst_pad_link_call_link_functions): Since this function is the
only one to set the NEGOTIATING flag on a pad, if the flag is set
it means that the link functions have indirectly recursed. If this
happens, error out to avoid infinite recursion and an eventual
SEGV.
(gst_real_pad_class_init): Remove a crufty GtkObject comment.
(gst_pad_proxy_getcaps): Intersect the result with the template
caps to ensure that the return value is valid.

2004-07-11  Andy Wingo  <wingo@pobox.com>

* gst/gstdata.c (gst_data_is_writable): s/>=/>/. If there is only
one refcount, the calling function is the owner of the buffer.
2004-07-14 15:28:51 +00:00

533 lines
21 KiB
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/* GStreamer
* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
* 2000 Wim Taymans <wim.taymans@chello.be>
*
* gstpad.h: Header for GstPad object
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef __GST_PAD_H__
#define __GST_PAD_H__
#include <gst/gstconfig.h>
#include <gst/gstobject.h>
#include <gst/gstbuffer.h>
#include <gst/gstcaps.h>
#include <gst/gstevent.h>
#include <gst/gstprobe.h>
#include <gst/gstquery.h>
G_BEGIN_DECLS
GST_EXPORT GType _gst_pad_type;
GST_EXPORT GType _gst_real_pad_type;
GST_EXPORT GType _gst_ghost_pad_type;
/*
* Pad base class
*/
#define GST_TYPE_PAD (_gst_pad_type)
#define GST_IS_PAD(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_PAD))
#define GST_IS_PAD_FAST(obj) (G_OBJECT_TYPE(obj) == GST_TYPE_REAL_PAD || \
G_OBJECT_TYPE(obj) == GST_TYPE_GHOST_PAD)
#define GST_IS_PAD_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_PAD))
#define GST_PAD(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_PAD, GstPad))
#define GST_PAD_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_PAD, GstPadClass))
/*
* Real Pads
*/
#define GST_TYPE_REAL_PAD (_gst_real_pad_type)
#define GST_IS_REAL_PAD(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_REAL_PAD))
#define GST_IS_REAL_PAD_FAST(obj) (G_OBJECT_TYPE(obj) == GST_TYPE_REAL_PAD)
#define GST_IS_REAL_PAD_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_REAL_PAD))
#define GST_REAL_PAD(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_REAL_PAD, GstRealPad))
#define GST_REAL_PAD_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_REAL_PAD, GstRealPadClass))
/*
* Ghost Pads
*/
#define GST_TYPE_GHOST_PAD (_gst_ghost_pad_type)
#define GST_IS_GHOST_PAD(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_GHOST_PAD))
#define GST_IS_GHOST_PAD_FAST(obj) (G_OBJECT_TYPE(obj) == GST_TYPE_GHOST_PAD)
#define GST_IS_GHOST_PAD_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_GHOST_PAD))
#define GST_GHOST_PAD(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_GHOST_PAD, GstGhostPad))
#define GST_GHOST_PAD_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_GHOST_PAD, GstGhostPadClass))
/*typedef struct _GstPad GstPad; */
/*typedef struct _GstPadClass GstPadClass;*/
typedef struct _GstRealPad GstRealPad;
typedef struct _GstRealPadClass GstRealPadClass;
typedef struct _GstGhostPad GstGhostPad;
typedef struct _GstGhostPadClass GstGhostPadClass;
/*typedef struct _GstPadTemplate GstPadTemplate;*/
/*typedef struct _GstPadTemplateClass GstPadTemplateClass;*/
typedef struct _GstStaticPadTemplate GstStaticPadTemplate;
typedef struct _GstPadLink GstPadLink;
typedef enum {
GST_PAD_LINK_REFUSED = -1,
GST_PAD_LINK_DELAYED = 0,
GST_PAD_LINK_OK = 1,
GST_PAD_LINK_DONE = 2
} GstPadLinkReturn;
#define GST_PAD_LINK_FAILED(ret) (ret < GST_PAD_LINK_OK)
#define GST_PAD_LINK_SUCCESSFUL(ret) (ret >= GST_PAD_LINK_OK)
/* convenience functions */
#ifndef GST_DISABLE_DEPRECATED
#ifdef G_HAVE_ISO_VARARGS
#define GST_PAD_QUERY_TYPE_FUNCTION(functionname, ...) GST_QUERY_TYPE_FUNCTION (GstPad *, functionname, __VA_ARGS__);
#define GST_PAD_FORMATS_FUNCTION(functionname, ...) GST_FORMATS_FUNCTION (GstPad *, functionname, __VA_ARGS__);
#define GST_PAD_EVENT_MASK_FUNCTION(functionname, ...) GST_EVENT_MASK_FUNCTION (GstPad *, functionname, __VA_ARGS__);
#elif defined(G_HAVE_GNUC_VARARGS)
#define GST_PAD_QUERY_TYPE_FUNCTION(functionname, a...) GST_QUERY_TYPE_FUNCTION (GstPad *, functionname, a);
#define GST_PAD_FORMATS_FUNCTION(functionname, a...) GST_FORMATS_FUNCTION (GstPad *, functionname, a);
#define GST_PAD_EVENT_MASK_FUNCTION(functionname, a...) GST_EVENT_MASK_FUNCTION (GstPad *, functionname, a);
#endif
#endif
/* this defines the functions used to chain buffers
* pad is the sink pad (so the same chain function can be used for N pads)
* buf is the buffer being passed */
typedef void (*GstPadChainFunction) (GstPad *pad,GstData *data);
typedef GstData* (*GstPadGetFunction) (GstPad *pad);
typedef gboolean (*GstPadEventFunction) (GstPad *pad, GstEvent *event);
typedef gboolean (*GstPadConvertFunction) (GstPad *pad,
GstFormat src_format, gint64 src_value,
GstFormat *dest_format, gint64 *dest_value);
typedef gboolean (*GstPadQueryFunction) (GstPad *pad, GstQueryType type,
GstFormat *format, gint64 *value);
typedef GList* (*GstPadIntLinkFunction) (GstPad *pad);
typedef const GstFormat* (*GstPadFormatsFunction) (GstPad *pad);
typedef const GstEventMask* (*GstPadEventMaskFunction) (GstPad *pad);
typedef const GstQueryType* (*GstPadQueryTypeFunction) (GstPad *pad);
typedef GstPadLinkReturn (*GstPadLinkFunction) (GstPad *pad, const GstCaps *caps);
typedef void (*GstPadUnlinkFunction) (GstPad *pad);
typedef GstCaps* (*GstPadGetCapsFunction) (GstPad *pad);
typedef GstCaps* (*GstPadFixateFunction) (GstPad *pad, const GstCaps *caps);
typedef GstBuffer* (*GstPadBufferAllocFunction) (GstPad *pad, guint64 offset, guint size);
typedef gboolean (*GstPadDispatcherFunction) (GstPad *pad, gpointer data);
typedef enum {
GST_PAD_UNKNOWN,
GST_PAD_SRC,
GST_PAD_SINK
} GstPadDirection;
typedef enum {
GST_PAD_DISABLED = GST_OBJECT_FLAG_LAST,
GST_PAD_NEGOTIATING,
GST_PAD_DISPATCHING,
GST_PAD_FLAG_LAST = GST_OBJECT_FLAG_LAST + 4
} GstPadFlags;
struct _GstPad {
GstObject object;
gpointer element_private;
GstPadTemplate *padtemplate; /* the template for this pad */
gpointer _gst_reserved[GST_PADDING];
};
struct _GstPadClass {
GstObjectClass parent_class;
gpointer _gst_reserved[GST_PADDING];
};
struct _GstRealPad {
GstPad pad;
/* the pad capabilities */
GstCaps *caps;
GstPadFixateFunction appfixatefunc;
GstCaps *appfilter;
GstPadGetCapsFunction getcapsfunc;
GstPadFixateFunction fixatefunc;
GstPadDirection direction;
GstPadLinkFunction linkfunc;
GstPadUnlinkFunction unlinkfunc;
GstRealPad *peer;
gpointer sched_private;
/* data transport functions */
GstPadChainFunction chainfunc;
GstPadChainFunction chainhandler;
GstPadGetFunction getfunc;
GstPadGetFunction gethandler;
GstPadEventFunction eventfunc;
GstPadEventFunction eventhandler;
GstPadEventMaskFunction eventmaskfunc;
GList *ghostpads;
/* query/convert/formats functions */
GstPadConvertFunction convertfunc;
GstPadQueryFunction queryfunc;
GstPadFormatsFunction formatsfunc;
GstPadQueryTypeFunction querytypefunc;
GstPadIntLinkFunction intlinkfunc;
GstPadBufferAllocFunction bufferallocfunc;
GstProbeDispatcher probedisp;
GstPadLink *link;
GstCaps *explicit_caps;
gpointer _gst_reserved[GST_PADDING];
};
struct _GstRealPadClass {
GstPadClass parent_class;
/* signal callbacks */
void (*caps_nego_failed) (GstPad *pad, GstCaps *caps);
void (*linked) (GstPad *pad, GstPad *peer);
void (*unlinked) (GstPad *pad, GstPad *peer);
GstPadFixateFunction appfixatefunc;
gpointer _gst_reserved[GST_PADDING];
};
struct _GstGhostPad {
GstPad pad;
GstRealPad *realpad;
gpointer _gst_reserved[GST_PADDING];
};
struct _GstGhostPadClass {
GstPadClass parent_class;
gpointer _gst_reserved[GST_PADDING];
};
/***** helper macros *****/
/* GstPad */
#define GST_PAD_NAME(pad) (GST_OBJECT_NAME(pad))
#define GST_PAD_PARENT(pad) ((GstElement *)(GST_OBJECT_PARENT(pad)))
#define GST_PAD_ELEMENT_PRIVATE(pad) (((GstPad *)(pad))->element_private)
#define GST_PAD_PAD_TEMPLATE(pad) (((GstPad *)(pad))->padtemplate)
/* GstRealPad */
#define GST_RPAD_DIRECTION(pad) (((GstRealPad *)(pad))->direction)
#define GST_RPAD_CAPS(pad) (((GstRealPad *)(pad))->caps)
#define GST_RPAD_APPFILTER(pad) (((GstRealPad *)(pad))->appfilter)
#define GST_RPAD_PEER(pad) (((GstRealPad *)(pad))->peer)
#define GST_RPAD_CHAINFUNC(pad) (((GstRealPad *)(pad))->chainfunc)
#define GST_RPAD_CHAINHANDLER(pad) (((GstRealPad *)(pad))->chainhandler)
#define GST_RPAD_GETFUNC(pad) (((GstRealPad *)(pad))->getfunc)
#define GST_RPAD_GETHANDLER(pad) (((GstRealPad *)(pad))->gethandler)
#define GST_RPAD_EVENTFUNC(pad) (((GstRealPad *)(pad))->eventfunc)
#define GST_RPAD_EVENTHANDLER(pad) (((GstRealPad *)(pad))->eventhandler)
#define GST_RPAD_CONVERTFUNC(pad) (((GstRealPad *)(pad))->convertfunc)
#define GST_RPAD_QUERYFUNC(pad) (((GstRealPad *)(pad))->queryfunc)
#define GST_RPAD_INTLINKFUNC(pad) (((GstRealPad *)(pad))->intlinkfunc)
#define GST_RPAD_FORMATSFUNC(pad) (((GstRealPad *)(pad))->formatsfunc)
#define GST_RPAD_QUERYTYPEFUNC(pad) (((GstRealPad *)(pad))->querytypefunc)
#define GST_RPAD_EVENTMASKFUNC(pad) (((GstRealPad *)(pad))->eventmaskfunc)
#define GST_RPAD_LINKFUNC(pad) (((GstRealPad *)(pad))->linkfunc)
#define GST_RPAD_UNLINKFUNC(pad) (((GstRealPad *)(pad))->unlinkfunc)
#define GST_RPAD_GETCAPSFUNC(pad) (((GstRealPad *)(pad))->getcapsfunc)
#define GST_RPAD_FIXATEFUNC(pad) (((GstRealPad *)(pad))->fixatefunc)
#define GST_RPAD_BUFFERALLOCFUNC(pad) (((GstRealPad *)(pad))->bufferallocfunc)
#define GST_RPAD_LINK(pad) (((GstRealPad *)(pad))->link)
#define GST_RPAD_EXPLICIT_CAPS(pad) (((GstRealPad *)(pad))->explicit_caps)
/* GstGhostPad */
#define GST_GPAD_REALPAD(pad) (((GstGhostPad *)(pad))->realpad)
/* Generic */
#define GST_PAD_REALIZE(pad) (GST_IS_REAL_PAD(pad) ? ((GstRealPad *)(pad)) : GST_GPAD_REALPAD(pad))
#define GST_PAD_DIRECTION(pad) GST_RPAD_DIRECTION(GST_PAD_REALIZE(pad))
#define GST_PAD_CAPS(pad) (gst_pad_get_negotiated_caps(GST_PAD (pad)))
#define GST_PAD_PEER(pad) GST_PAD(GST_RPAD_PEER(GST_PAD_REALIZE(pad)))
/* Some check functions (unused?) */
#define GST_PAD_IS_LINKED(pad) (GST_PAD_PEER(pad) != NULL)
#define GST_PAD_IS_ACTIVE(pad) (!GST_FLAG_IS_SET(GST_PAD_REALIZE(pad), GST_PAD_DISABLED))
#define GST_PAD_IS_NEGOTIATING(pad) (GST_FLAG_IS_SET (pad, GST_PAD_NEGOTIATING))
#define GST_PAD_IS_DISPATCHING(pad) (GST_FLAG_IS_SET (pad, GST_PAD_DISPATCHING))
#define GST_PAD_IS_USABLE(pad) (GST_PAD_IS_LINKED (pad) && \
GST_PAD_IS_ACTIVE(pad) && GST_PAD_IS_ACTIVE(GST_PAD_PEER (pad)))
#define GST_PAD_CAN_PULL(pad) (GST_IS_REAL_PAD(pad) && GST_REAL_PAD(pad)->gethandler != NULL)
#define GST_PAD_IS_SRC(pad) (GST_PAD_DIRECTION(pad) == GST_PAD_SRC)
#define GST_PAD_IS_SINK(pad) (GST_PAD_DIRECTION(pad) == GST_PAD_SINK)
/***** PadTemplate *****/
#define GST_TYPE_PAD_TEMPLATE (gst_pad_template_get_type ())
#define GST_PAD_TEMPLATE(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_PAD_TEMPLATE,GstPadTemplate))
#define GST_PAD_TEMPLATE_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_PAD_TEMPLATE,GstPadTemplateClass))
#define GST_IS_PAD_TEMPLATE(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_PAD_TEMPLATE))
#define GST_IS_PAD_TEMPLATE_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_PAD_TEMPLATE))
typedef enum {
GST_PAD_ALWAYS,
GST_PAD_SOMETIMES,
GST_PAD_REQUEST
} GstPadPresence;
#define GST_PAD_TEMPLATE_NAME_TEMPLATE(templ) (((GstPadTemplate *)(templ))->name_template)
#define GST_PAD_TEMPLATE_DIRECTION(templ) (((GstPadTemplate *)(templ))->direction)
#define GST_PAD_TEMPLATE_PRESENCE(templ) (((GstPadTemplate *)(templ))->presence)
#define GST_PAD_TEMPLATE_CAPS(templ) (((GstPadTemplate *)(templ))->caps)
typedef enum {
GST_PAD_TEMPLATE_FIXED = GST_OBJECT_FLAG_LAST,
GST_PAD_TEMPLATE_FLAG_LAST = GST_OBJECT_FLAG_LAST + 4
} GstPadTemplateFlags;
#define GST_PAD_TEMPLATE_IS_FIXED(templ) (GST_FLAG_IS_SET(templ, GST_PAD_TEMPLATE_FIXED))
struct _GstPadTemplate {
GstObject object;
gchar *name_template;
GstPadDirection direction;
GstPadPresence presence;
GstCaps *caps;
gpointer _gst_reserved[GST_PADDING];
};
struct _GstPadTemplateClass {
GstObjectClass parent_class;
/* signal callbacks */
void (*pad_created) (GstPadTemplate *templ, GstPad *pad);
gpointer _gst_reserved[GST_PADDING];
};
struct _GstStaticPadTemplate {
gchar *name_template;
GstPadDirection direction;
GstPadPresence presence;
GstStaticCaps static_caps;
};
#define GST_STATIC_PAD_TEMPLATE(padname, dir, pres, caps) \
{ \
/* name_template */ padname, \
/* direction */ dir, \
/* presence */ pres, \
/* caps */ caps \
}
GType gst_pad_get_type (void);
GType gst_real_pad_get_type (void);
GType gst_ghost_pad_get_type (void);
/* creating pads */
GstPad* gst_pad_new (const gchar *name, GstPadDirection direction);
GstPad* gst_pad_new_from_template (GstPadTemplate *templ, const gchar *name);
GstPad* gst_pad_custom_new (GType type, const gchar *name, GstPadDirection direction);
GstPad* gst_pad_custom_new_from_template (GType type, GstPadTemplate *templ, const gchar *name);
void gst_pad_set_name (GstPad *pad, const gchar *name);
G_CONST_RETURN gchar* gst_pad_get_name (GstPad *pad);
GstPadDirection gst_pad_get_direction (GstPad *pad);
void gst_pad_set_active (GstPad *pad, gboolean active);
gboolean gst_pad_is_active (GstPad *pad);
void gst_pad_set_element_private (GstPad *pad, gpointer priv);
gpointer gst_pad_get_element_private (GstPad *pad);
void gst_pad_set_parent (GstPad *pad, GstElement *parent);
GstElement* gst_pad_get_parent (GstPad *pad);
GstElement* gst_pad_get_real_parent (GstPad *pad);
GstScheduler* gst_pad_get_scheduler (GstPad *pad);
void gst_pad_add_ghost_pad (GstPad *pad, GstPad *ghostpad);
void gst_pad_remove_ghost_pad (GstPad *pad, GstPad *ghostpad);
GList* gst_pad_get_ghost_pad_list (GstPad *pad);
GstPadTemplate* gst_pad_get_pad_template (GstPad *pad);
void gst_pad_set_bufferalloc_function (GstPad *pad, GstPadBufferAllocFunction bufalloc);
GstBuffer* gst_pad_alloc_buffer (GstPad *pad, guint64 offset, gint size);
/* data passing setup functions */
void gst_pad_set_chain_function (GstPad *pad, GstPadChainFunction chain);
void gst_pad_set_get_function (GstPad *pad, GstPadGetFunction get);
void gst_pad_set_event_function (GstPad *pad, GstPadEventFunction event);
void gst_pad_set_event_mask_function (GstPad *pad, GstPadEventMaskFunction mask_func);
G_CONST_RETURN GstEventMask*
gst_pad_get_event_masks (GstPad *pad);
G_CONST_RETURN GstEventMask*
gst_pad_get_event_masks_default (GstPad *pad);
/* pad links */
void gst_pad_set_link_function (GstPad *pad, GstPadLinkFunction link);
gboolean gst_pad_can_link (GstPad *srcpad, GstPad *sinkpad);
gboolean gst_pad_can_link_filtered (GstPad *srcpad, GstPad *sinkpad, const GstCaps *filtercaps);
void gst_pad_set_unlink_function (GstPad *pad, GstPadUnlinkFunction unlink);
gboolean gst_pad_link (GstPad *srcpad, GstPad *sinkpad);
gboolean gst_pad_link_filtered (GstPad *srcpad, GstPad *sinkpad, const GstCaps *filtercaps);
void gst_pad_unlink (GstPad *srcpad, GstPad *sinkpad);
gboolean gst_pad_is_linked (GstPad *pad);
GstPad* gst_pad_get_peer (GstPad *pad);
/* capsnego functions */
G_CONST_RETURN GstCaps* gst_pad_get_negotiated_caps (GstPad *pad);
gboolean gst_pad_is_negotiated (GstPad *pad);
GstCaps* gst_pad_get_caps (GstPad *pad);
G_CONST_RETURN GstCaps* gst_pad_get_pad_template_caps (GstPad *pad);
GstPadLinkReturn gst_pad_try_set_caps (GstPad *pad, const GstCaps *caps);
GstPadLinkReturn gst_pad_try_set_caps_nonfixed (GstPad *pad, const GstCaps *caps);
gboolean gst_pad_check_compatibility (GstPad *srcpad, GstPad *sinkpad);
void gst_pad_set_getcaps_function (GstPad *pad, GstPadGetCapsFunction getcaps);
void gst_pad_set_fixate_function (GstPad *pad, GstPadFixateFunction fixate);
GstCaps * gst_pad_proxy_getcaps (GstPad *pad);
GstPadLinkReturn gst_pad_proxy_pad_link (GstPad *pad, const GstCaps *caps);
GstCaps * gst_pad_proxy_fixate (GstPad *pad, const GstCaps *caps);
#ifndef GST_DISABLE_DEPRECATED
GstPadLinkReturn gst_pad_proxy_link (GstPad *pad, const GstCaps *caps);
#endif
gboolean gst_pad_set_explicit_caps (GstPad *pad, const GstCaps *caps);
void gst_pad_use_explicit_caps (GstPad *pad);
gboolean gst_pad_relink_filtered (GstPad *srcpad, GstPad *sinkpad, const GstCaps *filtercaps);
#ifndef GST_DISABLE_DEPRECATED
gboolean gst_pad_perform_negotiate (GstPad *srcpad, GstPad *sinkpad);
#endif
GstPadLinkReturn gst_pad_renegotiate (GstPad *pad);
void gst_pad_unnegotiate (GstPad *pad);
gboolean gst_pad_try_relink_filtered (GstPad *srcpad, GstPad *sinkpad, const GstCaps *filtercaps);
GstCaps* gst_pad_get_allowed_caps (GstPad *pad);
void gst_pad_caps_change_notify (GstPad *pad);
gboolean gst_pad_recover_caps_error (GstPad *pad, const GstCaps *allowed);
/* data passing functions */
void gst_pad_push (GstPad *pad, GstData *data);
GstData* gst_pad_pull (GstPad *pad);
gboolean gst_pad_send_event (GstPad *pad, GstEvent *event);
gboolean gst_pad_event_default (GstPad *pad, GstEvent *event);
#ifndef GST_DISABLE_DEPRECATED
GstPad* gst_pad_selectv (GList *padlist);
GstPad* gst_pad_select (GstPad *pad, ...);
GstPad* gst_pad_select_valist (GstPad *pad, va_list varargs);
#endif
/* FIXME 0.9: rename to _select? Otherwise rename SchedulerClass pointer */
GstData * gst_pad_collectv (GstPad **selected, const GList *padlist);
GstData * gst_pad_collect (GstPad **selected, GstPad *pad, ...);
GstData * gst_pad_collect_valist (GstPad **selected, GstPad *pad, va_list varargs);
/* convert/query/format functions */
void gst_pad_set_formats_function (GstPad *pad,
GstPadFormatsFunction formats);
G_CONST_RETURN GstFormat*
gst_pad_get_formats (GstPad *pad);
G_CONST_RETURN GstFormat*
gst_pad_get_formats_default (GstPad *pad);
void gst_pad_set_convert_function (GstPad *pad, GstPadConvertFunction convert);
gboolean gst_pad_convert (GstPad *pad,
GstFormat src_format, gint64 src_value,
GstFormat *dest_format, gint64 *dest_value);
gboolean gst_pad_convert_default (GstPad *pad,
GstFormat src_format, gint64 src_value,
GstFormat *dest_format, gint64 *dest_value);
void gst_pad_set_query_function (GstPad *pad, GstPadQueryFunction query);
void gst_pad_set_query_type_function (GstPad *pad, GstPadQueryTypeFunction type_func);
G_CONST_RETURN GstQueryType*
gst_pad_get_query_types (GstPad *pad);
G_CONST_RETURN GstQueryType*
gst_pad_get_query_types_default (GstPad *pad);
gboolean gst_pad_query (GstPad *pad, GstQueryType type,
GstFormat *format, gint64 *value);
gboolean gst_pad_query_default (GstPad *pad, GstQueryType type,
GstFormat *format, gint64 *value);
void gst_pad_set_internal_link_function (GstPad *pad, GstPadIntLinkFunction intlink);
GList* gst_pad_get_internal_links (GstPad *pad);
GList* gst_pad_get_internal_links_default (GstPad *pad);
/* misc helper functions */
gboolean gst_pad_dispatcher (GstPad *pad, GstPadDispatcherFunction dispatch,
gpointer data);
#define gst_pad_add_probe(pad, probe) \
(gst_probe_dispatcher_add_probe (&(GST_REAL_PAD (pad)->probedisp), probe))
#define gst_pad_remove_probe(pad, probe) \
(gst_probe_dispatcher_remove_probe (&(GST_REAL_PAD (pad)->probedisp), probe))
#ifndef GST_DISABLE_LOADSAVE
void gst_pad_load_and_link (xmlNodePtr self, GstObject *parent);
#endif
/* ghostpads */
GstPad* gst_ghost_pad_new (const gchar *name, GstPad *pad);
/* templates and factories */
GType gst_pad_template_get_type (void);
GstPadTemplate* gst_pad_template_new (const gchar *name_template,
GstPadDirection direction, GstPadPresence presence,
GstCaps *caps);
GstPadTemplate * gst_static_pad_template_get (GstStaticPadTemplate *pad_template);
const GstCaps* gst_pad_template_get_caps (GstPadTemplate *templ);
#ifndef GST_DISABLE_DEPRECATED
const GstCaps* gst_pad_template_get_caps_by_name (GstPadTemplate *templ, const gchar *name);
#endif
#ifndef GST_DISABLE_LOADSAVE
xmlNodePtr gst_ghost_pad_save_thyself (GstPad *pad,
xmlNodePtr parent);
#endif
/* for schedulers only */
void gst_pad_call_chain_function (GstPad *pad, GstData *data);
GstData * gst_pad_call_get_function (GstPad *pad);
G_END_DECLS
#endif /* __GST_PAD_H__ */
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