mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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607 lines
24 KiB
C
607 lines
24 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/gstprobe.h>
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#include <gst/gstquery.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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GST_EXPORT GType _gst_real_pad_type;
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GST_EXPORT GType _gst_ghost_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_REAL_PAD || \
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G_OBJECT_TYPE(obj) == GST_TYPE_GHOST_PAD)
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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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/*
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* Real Pads
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*/
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#define GST_TYPE_REAL_PAD (_gst_real_pad_type)
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#define GST_IS_REAL_PAD(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_REAL_PAD))
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#define GST_IS_REAL_PAD_FAST(obj) (G_OBJECT_TYPE(obj) == GST_TYPE_REAL_PAD)
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#define GST_IS_REAL_PAD_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_REAL_PAD))
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#define GST_REAL_PAD(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_REAL_PAD, GstRealPad))
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#define GST_REAL_PAD_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_REAL_PAD, GstRealPadClass))
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#define GST_REAL_PAD_CAST(obj) ((GstRealPad*)(obj))
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/*
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* Ghost Pads
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*/
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#define GST_TYPE_GHOST_PAD (_gst_ghost_pad_type)
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#define GST_IS_GHOST_PAD(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_GHOST_PAD))
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#define GST_IS_GHOST_PAD_FAST(obj) (G_OBJECT_TYPE(obj) == GST_TYPE_GHOST_PAD)
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#define GST_IS_GHOST_PAD_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_GHOST_PAD))
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#define GST_GHOST_PAD(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_GHOST_PAD, GstGhostPad))
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#define GST_GHOST_PAD_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_GHOST_PAD, GstGhostPadClass))
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#define GST_GHOST_PAD_CAST(obj) ((GstGhostPad*)(obj))
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/*typedef struct _GstPad GstPad; */
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/*typedef struct _GstPadClass GstPadClass;*/
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typedef struct _GstRealPad GstRealPad;
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typedef struct _GstRealPadClass GstRealPadClass;
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typedef struct _GstGhostPad GstGhostPad;
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typedef struct _GstGhostPadClass GstGhostPadClass;
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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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typedef struct _GstPadLink GstPadLink;
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typedef enum {
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GST_PAD_LINK_NOSCHED = -5, /* pads cannot cooperate in scheduling */
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GST_PAD_LINK_NOFORMAT = -4, /* pads do not have common format */
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GST_PAD_LINK_REFUSED = -3, /* refused for some reason */
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GST_PAD_LINK_WRONG_DIRECTION = -2, /* pads have wrong direction */
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GST_PAD_LINK_WAS_LINKED = -1, /* pad was already linked */
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GST_PAD_LINK_OK = 0, /* link ok */
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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_OK = 0, /* data passing was ok */
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GST_FLOW_RESEND = 1, /* resend buffer, possibly with new caps */
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GST_FLOW_ERROR = -1, /* some (fatal) error occured */
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GST_FLOW_NOT_CONNECTED = -2, /* pad is not connected */
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GST_FLOW_NOT_NEGOTIATED = -3, /* pad is not negotiated */
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GST_FLOW_WRONG_STATE = -4, /* pad is in wrong state */
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GST_FLOW_UNEXPECTED = -5, /* did not expect anything, this is not fatal */
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GST_FLOW_NOT_SUPPORTED = -6 /* function not supported */
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} GstFlowReturn;
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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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/* convenience functions */
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#ifdef G_HAVE_ISO_VARARGS
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#define GST_PAD_QUERY_TYPE_FUNCTION(functionname, ...) GST_QUERY_TYPE_FUNCTION (GstPad *, functionname, __VA_ARGS__);
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#define GST_PAD_FORMATS_FUNCTION(functionname, ...) GST_FORMATS_FUNCTION (GstPad *, functionname, __VA_ARGS__);
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#define GST_PAD_EVENT_MASK_FUNCTION(functionname, ...) GST_EVENT_MASK_FUNCTION (GstPad *, functionname, __VA_ARGS__);
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#elif defined(G_HAVE_GNUC_VARARGS)
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#define GST_PAD_QUERY_TYPE_FUNCTION(functionname, a...) GST_QUERY_TYPE_FUNCTION (GstPad *, functionname, a);
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#define GST_PAD_FORMATS_FUNCTION(functionname, a...) GST_FORMATS_FUNCTION (GstPad *, functionname, a);
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#define GST_PAD_EVENT_MASK_FUNCTION(functionname, a...) GST_EVENT_MASK_FUNCTION (GstPad *, functionname, a);
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#endif
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/* pad states */
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typedef gboolean (*GstPadActivateFunction) (GstPad *pad, GstActivateMode mode);
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/* data passing */
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typedef void (*GstPadLoopFunction) (GstPad *pad);
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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 (*GstPadCheckGetRangeFunction) (GstPad *pad);
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typedef gboolean (*GstPadEventFunction) (GstPad *pad, GstEvent *event);
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/* convert/query/format functions */
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typedef gboolean (*GstPadConvertFunction) (GstPad *pad,
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GstFormat src_format, gint64 src_value,
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GstFormat *dest_format, gint64 *dest_value);
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typedef gboolean (*GstPadQueryFunction) (GstPad *pad, GstQueryType type,
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GstFormat *format, gint64 *value);
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typedef GList* (*GstPadIntLinkFunction) (GstPad *pad);
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typedef const GstFormat* (*GstPadFormatsFunction) (GstPad *pad);
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typedef const GstEventMask* (*GstPadEventMaskFunction) (GstPad *pad);
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typedef const GstQueryType* (*GstPadQueryTypeFunction) (GstPad *pad);
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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 GstCaps* (*GstPadFixateCapsFunction) (GstPad *pad, GstCaps *caps);
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typedef GstBuffer* (*GstPadBufferAllocFunction) (GstPad *pad, guint64 offset, guint size,
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GstCaps *caps);
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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_ACTIVE = GST_OBJECT_FLAG_LAST,
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GST_PAD_BLOCKED,
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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; /* the template for this pad */
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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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gpointer _gst_reserved[GST_PADDING];
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};
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struct _GstRealPad {
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GstPad pad;
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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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/* pad link */
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GstPadLinkFunction linkfunc;
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GstPadUnlinkFunction unlinkfunc;
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GstRealPad *peer;
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gpointer sched_private;
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/* data transport functions */
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GstPadLoopFunction loopfunc;
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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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GstPadEventMaskFunction eventmaskfunc;
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/* ghostpads */
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GList *ghostpads;
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guint32 ghostpads_cookie;
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/* query/convert/formats functions */
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GstPadConvertFunction convertfunc;
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GstPadQueryFunction queryfunc;
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GstPadFormatsFunction formatsfunc;
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GstPadQueryTypeFunction querytypefunc;
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GstPadIntLinkFunction intlinkfunc;
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GstPadBufferAllocFunction bufferallocfunc;
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GstProbeDispatcher probedisp;
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/*< private >*/
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gpointer _gst_reserved[GST_PADDING];
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};
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struct _GstRealPadClass {
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GstPadClass 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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/*< private >*/
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gpointer _gst_reserved[GST_PADDING];
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};
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struct _GstGhostPad {
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GstPad pad;
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GstRealPad *realpad;
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gpointer _gst_reserved[GST_PADDING];
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};
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struct _GstGhostPadClass {
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GstPadClass parent_class;
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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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/* GstRealPad */
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#define GST_RPAD_DIRECTION(pad) (GST_REAL_PAD_CAST(pad)->direction)
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#define GST_RPAD_TASK(pad) (GST_REAL_PAD_CAST(pad)->task)
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#define GST_RPAD_ACTIVATEFUNC(pad) (GST_REAL_PAD_CAST(pad)->activatefunc)
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#define GST_RPAD_LOOPFUNC(pad) (GST_REAL_PAD_CAST(pad)->loopfunc)
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#define GST_RPAD_CHAINFUNC(pad) (GST_REAL_PAD_CAST(pad)->chainfunc)
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#define GST_RPAD_CHECKGETRANGEFUNC(pad) (GST_REAL_PAD_CAST(pad)->checkgetrangefunc)
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#define GST_RPAD_GETRANGEFUNC(pad) (GST_REAL_PAD_CAST(pad)->getrangefunc)
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#define GST_RPAD_EVENTFUNC(pad) (GST_REAL_PAD_CAST(pad)->eventfunc)
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#define GST_RPAD_CONVERTFUNC(pad) (GST_REAL_PAD_CAST(pad)->convertfunc)
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#define GST_RPAD_QUERYFUNC(pad) (GST_REAL_PAD_CAST(pad)->queryfunc)
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#define GST_RPAD_INTLINKFUNC(pad) (GST_REAL_PAD_CAST(pad)->intlinkfunc)
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#define GST_RPAD_FORMATSFUNC(pad) (GST_REAL_PAD_CAST(pad)->formatsfunc)
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#define GST_RPAD_QUERYTYPEFUNC(pad) (GST_REAL_PAD_CAST(pad)->querytypefunc)
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#define GST_RPAD_EVENTMASKFUNC(pad) (GST_REAL_PAD_CAST(pad)->eventmaskfunc)
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#define GST_RPAD_PEER(pad) (GST_REAL_PAD_CAST(pad)->peer)
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#define GST_RPAD_LINKFUNC(pad) (GST_REAL_PAD_CAST(pad)->linkfunc)
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#define GST_RPAD_UNLINKFUNC(pad) (GST_REAL_PAD_CAST(pad)->unlinkfunc)
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#define GST_RPAD_CAPS(pad) (GST_REAL_PAD_CAST(pad)->caps)
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#define GST_RPAD_GETCAPSFUNC(pad) (GST_REAL_PAD_CAST(pad)->getcapsfunc)
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#define GST_RPAD_SETCAPSFUNC(pad) (GST_REAL_PAD_CAST(pad)->setcapsfunc)
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#define GST_RPAD_ACCEPTCAPSFUNC(pad) (GST_REAL_PAD_CAST(pad)->acceptcapsfunc)
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#define GST_RPAD_FIXATECAPSFUNC(pad) (GST_REAL_PAD_CAST(pad)->fixatecapsfunc)
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#define GST_RPAD_BUFFERALLOCFUNC(pad) (GST_REAL_PAD_CAST(pad)->bufferallocfunc)
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#define GST_RPAD_IS_LINKED(pad) (GST_RPAD_PEER(pad) != NULL)
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#define GST_RPAD_IS_ACTIVE(pad) (GST_FLAG_IS_SET (pad, GST_PAD_ACTIVE))
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#define GST_RPAD_IS_BLOCKED(pad) (GST_FLAG_IS_SET (pad, GST_PAD_BLOCKED))
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#define GST_RPAD_IS_FLUSHING(pad) (GST_FLAG_IS_SET (pad, GST_PAD_FLUSHING))
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#define GST_RPAD_IS_IN_GETCAPS(pad) (GST_FLAG_IS_SET (pad, GST_PAD_IN_GETCAPS))
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#define GST_RPAD_IS_IN_SETCAPS(pad) (GST_FLAG_IS_SET (pad, GST_PAD_IN_SETCAPS))
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#define GST_RPAD_IS_USABLE(pad) (GST_RPAD_IS_LINKED (pad) && \
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GST_RPAD_IS_ACTIVE(pad) && GST_RPAD_IS_ACTIVE(GST_RPAD_PEER (pad)))
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#define GST_RPAD_IS_SRC(pad) (GST_RPAD_DIRECTION(pad) == GST_PAD_SRC)
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#define GST_RPAD_IS_SINK(pad) (GST_RPAD_DIRECTION(pad) == GST_PAD_SINK)
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#define GST_STREAM_GET_LOCK(pad) (GST_PAD_REALIZE(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_PREROLL_GET_LOCK(pad) (GST_PAD_REALIZE(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_REALIZE(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_REALIZE(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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/* GstGhostPad */
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#define GST_GPAD_REALPAD(pad) (((GstGhostPad *)(pad))->realpad)
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/* Generic, be VERY carefull with these macros as the ghostpad could be lost */
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#define GST_PAD_REALIZE(pad) (GST_IS_REAL_PAD(pad) ? ((GstRealPad *)(pad)) : GST_GPAD_REALPAD(pad))
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#define GST_PAD_DIRECTION(pad) GST_RPAD_DIRECTION(GST_PAD_REALIZE(pad))
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#define GST_PAD_CAPS(pad) GST_RPAD_CAPS(GST_PAD_REALIZE (pad))
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#define GST_PAD_PEER(pad) GST_PAD_CAST(GST_RPAD_PEER(GST_PAD_REALIZE(pad)))
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/* Some check functions (unused?) */
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#define GST_PAD_IS_LINKED(pad) (GST_RPAD_IS_LINKED(GST_PAD_REALIZE(pad)))
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#define GST_PAD_IS_ACTIVE(pad) (GST_RPAD_IS_ACTIVE(GST_PAD_REALIZE(pad)))
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#define GST_PAD_IS_BLOCKED(pad) (GST_RPAD_IS_BLOCKED(GST_PAD_REALIZE(pad)))
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#define GST_PAD_IS_NEGOTIATING(pad) (GST_RPAD_IS_NEGOTIATING(GST_PAD_REALIZE(pad)))
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#define GST_PAD_IS_IN_GETCAPS(pad) (GST_RPAD_IS_IN_GETCAPS(GST_PAD_REALIZE(pad)))
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#define GST_PAD_IS_IN_SETCAPS(pad) (GST_RPAD_IS_IN_SETCAPS(GST_PAD_REALIZE(pad)))
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#define GST_PAD_IS_USABLE(pad) (GST_RPAD_IS_USABLE(GST_PAD_REALIZE(pad)))
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#define GST_PAD_CAN_PULL(pad) (GST_RPAD_CAN_PULL(GST_PAD_REALIZE(pad)))
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#define GST_PAD_IS_SRC(pad) (GST_RPAD_IS_SRC(GST_PAD_REALIZE(pad)))
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#define GST_PAD_IS_SINK(pad) (GST_RPAD_IS_SINK(GST_PAD_REALIZE(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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GType gst_real_pad_get_type (void);
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GType gst_ghost_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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GstPad* gst_pad_custom_new (GType type, const gchar *name, GstPadDirection direction);
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GstPad* gst_pad_custom_new_from_template (GType type, GstPadTemplate *templ, const gchar *name);
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#define gst_pad_get_name(pad) gst_object_get_name(GST_OBJECT(pad))
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#define gst_pad_set_name(pad,name) gst_object_set_name(GST_OBJECT(pad),name)
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#define gst_pad_get_parent(pad) GST_ELEMENT(gst_object_get_parent(GST_OBJECT(pad)))
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#define gst_pad_set_parent(pad,parent) gst_object_set_parent(GST_OBJECT(pad),parent)
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GstElement* gst_pad_get_real_parent (GstPad *pad);
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GstPadDirection gst_pad_get_direction (GstPad *pad);
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gboolean gst_pad_set_active (GstPad *pad, GstActivateMode mode);
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gboolean gst_pad_peer_set_active (GstPad *pad, GstActivateMode mode);
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gboolean gst_pad_is_active (GstPad *pad);
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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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GstBuffer* gst_pad_alloc_buffer (GstPad *pad, guint64 offset, gint size,
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GstCaps *caps);
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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_loop_function (GstPad *pad, GstPadLoopFunction loop);
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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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void gst_pad_set_event_mask_function (GstPad *pad, GstPadEventMaskFunction mask_func);
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G_CONST_RETURN GstEventMask*
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gst_pad_get_event_masks (GstPad *pad);
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G_CONST_RETURN GstEventMask*
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gst_pad_get_event_masks_default (GstPad *pad);
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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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GstPad* gst_pad_realize (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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GstCaps* 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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|
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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 */
|
|
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 */
|
|
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,
|
|
GstBuffer **buffer);
|
|
gboolean gst_pad_push_event (GstPad *pad, GstEvent *event);
|
|
gboolean gst_pad_send_event (GstPad *pad, GstEvent *event);
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|
gboolean gst_pad_event_default (GstPad *pad, GstEvent *event);
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|
|
|
/* pad tasks */
|
|
gboolean gst_pad_start_task (GstPad *pad);
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|
gboolean gst_pad_pause_task (GstPad *pad);
|
|
gboolean gst_pad_stop_task (GstPad *pad);
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|
|
|
/* 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);
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|
|
|
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);
|
|
|
|
/* probes */
|
|
#define gst_pad_add_probe(pad, probe) \
|
|
(gst_probe_dispatcher_add_probe (&(GST_PAD_REALIZE (pad)->probedisp), probe))
|
|
#define gst_pad_remove_probe(pad, probe) \
|
|
(gst_probe_dispatcher_remove_probe (&(GST_PAD_REALIZE (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);
|
|
GstCaps* gst_static_pad_template_get_caps (GstStaticPadTemplate *templ);
|
|
GstCaps* gst_pad_template_get_caps (GstPadTemplate *templ);
|
|
|
|
#ifndef GST_DISABLE_LOADSAVE
|
|
xmlNodePtr gst_ghost_pad_save_thyself (GstPad *pad,
|
|
xmlNodePtr parent);
|
|
#endif
|
|
|
|
|
|
G_END_DECLS
|
|
|
|
#endif /* __GST_PAD_H__ */
|