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gstreamer/gst/gstpad.h
Erik Walthinsen c7f0713077 First round of changes to port to GObject. libgst.la compiles, though there are a few things commented out. Specifi... 
Original commit message from CVS:
First round of changes to port to GObject.  libgst.la compiles, though
there are a few things commented out.  Specifically object destruction
is probably broken, but wtay gets to fix that because he researched the
problem of glib 2.0 object destruction while doing the first round.
Some of the XML stuff is commented out, but that's an easy fix.

Next is the rest of the gst/ directory, then on to the plugins.
2001-06-13 21:52:36 +00:00

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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 <parser.h> // NOTE: This is xml-config's fault
// Include compatability defines: if libxml hasn't already defined these,
// we have an old version 1.x
#ifndef xmlChildrenNode
#define xmlChildrenNode childs
#define xmlRootNode root
#endif
#include <gst/gstobject.h>
#include <gst/gstbuffer.h>
#include <gst/cothreads.h>
#include <gst/gstcaps.h>
#ifdef __cplusplus
extern "C" {
#endif /* __cplusplus */
#define GST_TYPE_PAD (gst_pad_get_type ())
#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))
#define GST_IS_PAD(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_PAD))
#define GST_IS_PAD_CLASS(obj) (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_PAD))
#define GST_TYPE_REAL_PAD (gst_real_pad_get_type ())
#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))
#define GST_IS_REAL_PAD(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_REAL_PAD))
#define GST_IS_REAL_PAD_CLASS(obj) (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_REAL_PAD))
#define GST_TYPE_GHOST_PAD (gst_ghost_pad_get_type ())
#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))
#define GST_IS_GHOST_PAD(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_GHOST_PAD))
#define GST_IS_GHOST_PAD_CLASS(obj) (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_GHOST_PAD))
//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 enum {
GST_REGION_VOID,
GST_REGION_OFFSET_LEN,
GST_REGION_TIME_LEN,
} GstRegionType;
typedef enum {
GST_PAD_NEGOTIATE_FAIL,
GST_PAD_NEGOTIATE_AGREE,
GST_PAD_NEGOTIATE_TRY,
} GstPadNegotiateReturn;
/* 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,GstBuffer *buf);
typedef GstBuffer* (*GstPadGetFunction) (GstPad *pad);
typedef GstBuffer* (*GstPadGetRegionFunction) (GstPad *pad, GstRegionType type, guint64 offset, guint64 len);
typedef void (*GstPadQoSFunction) (GstPad *pad, glong qos_message);
typedef void (*GstPadPushFunction) (GstPad *pad, GstBuffer *buf);
typedef GstBuffer* (*GstPadPullFunction) (GstPad *pad);
typedef GstBuffer* (*GstPadPullRegionFunction) (GstPad *pad, GstRegionType type, guint64 offset, guint64 len);
typedef gboolean (*GstPadEOSFunction) (GstPad *pad);
typedef GstPadNegotiateReturn (*GstPadNegotiateFunction) (GstPad *pad, GstCaps **caps, gpointer *data);
typedef void (*GstPadNewCapsFunction) (GstPad *pad, GstCaps *caps);
typedef GstBufferPool* (*GstPadBufferPoolFunction) (GstPad *pad);
typedef enum {
GST_PAD_UNKNOWN,
GST_PAD_SRC,
GST_PAD_SINK,
} GstPadDirection;
typedef enum {
GST_PAD_DISABLED = GST_OBJECT_FLAG_LAST,
GST_PAD_EOS,
GST_PAD_FLAG_LAST = GST_OBJECT_FLAG_LAST + 4,
} GstPadFlags;
struct _GstPad {
GstObject object;
gpointer element_private;
GstPadTemplate *padtemplate; /* the template for this pad */
};
struct _GstPadClass {
GstObjectClass parent_class;
};
struct _GstRealPad {
GstPad pad;
GstCaps *caps;
GstPadDirection direction;
cothread_state *threadstate;
GstRealPad *peer;
GstBuffer *bufpen;
GstRegionType regiontype;
guint64 offset;
guint64 len;
GstSchedule *sched;
GstPadChainFunction chainfunc;
GstPadGetFunction getfunc;
GstPadGetRegionFunction getregionfunc;
GstPadQoSFunction qosfunc;
GstPadEOSFunction eosfunc;
GstPadPushFunction pushfunc;
GstPadPullFunction pullfunc;
GstPadPullRegionFunction pullregionfunc;
GstPadNegotiateFunction negotiatefunc;
GstPadNewCapsFunction newcapsfunc;
GstPadBufferPoolFunction bufferpoolfunc;
GList *ghostpads;
};
struct _GstRealPadClass {
GstPadClass parent_class;
/* signal callbacks */
void (*set_active) (GstPad *pad, gboolean active);
void (*caps_changed) (GstPad *pad, GstCaps *newcaps);
void (*caps_nego_failed) (GstPad *pad);
void (*connected) (GstPad *pad, GstPad *peer);
void (*disconnected) (GstPad *pad, GstPad *peer);
void (*eos) (GstPad *pad);
};
struct _GstGhostPad {
GstPad pad;
GstRealPad *realpad;
};
struct _GstGhostPadClass {
GstPadClass parent_class;
};
/***** 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_PADTEMPLATE(pad) (((GstPad *)(pad))->padtemplate)
/* GstRealPad */
#define GST_RPAD_DIRECTION(pad) (((GstRealPad *)(pad))->direction)
#define GST_RPAD_CAPS(pad) (((GstRealPad *)(pad))->caps)
#define GST_RPAD_PEER(pad) (((GstRealPad *)(pad))->peer)
#define GST_RPAD_BUFPEN(pad) (((GstRealPad *)(pad))->bufpen)
#define GST_RPAD_SCHED(pad) (((GstRealPad *)(pad))->sched)
#define GST_RPAD_CHAINFUNC(pad) (((GstRealPad *)(pad))->chainfunc)
#define GST_RPAD_GETFUNC(pad) (((GstRealPad *)(pad))->getfunc)
#define GST_RPAD_GETREGIONFUNC(pad) (((GstRealPad *)(pad))->getregionfunc)
#define GST_RPAD_PUSHFUNC(pad) (((GstRealPad *)(pad))->pushfunc)
#define GST_RPAD_PULLFUNC(pad) (((GstRealPad *)(pad))->pullfunc)
#define GST_RPAD_PULLREGIONFUNC(pad) (((GstRealPad *)(pad))->pullregionfunc)
#define GST_RPAD_QOSFUNC(pad) (((GstRealPad *)(pad))->qosfunc)
#define GST_RPAD_EOSFUNC(pad) (((GstRealPad *)(pad))->eosfunc)
#define GST_RPAD_NEGOTIATEFUNC(pad) (((GstRealPad *)(pad))->negotiatefunc)
#define GST_RPAD_NEWCAPSFUNC(pad) (((GstRealPad *)(pad))->newcapsfunc)
#define GST_RPAD_BUFFERPOOLFUNC(pad) (((GstRealPad *)(pad))->bufferpoolfunc)
#define GST_RPAD_REGIONTYPE(pad) (((GstRealPad *)(pad))->regiontype)
#define GST_RPAD_OFFSET(pad) (((GstRealPad *)(pad))->offset)
#define GST_RPAD_LEN(pad) (((GstRealPad *)(pad))->len)
/* 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_RPAD_CAPS(GST_PAD_REALIZE(pad))
#define GST_PAD_PEER(pad) GST_RPAD_PEER(GST_PAD_REALIZE(pad))
/* Some check functions (unused?) */
#define GST_PAD_CONNECTED(pad) (GST_PAD_PEER(pad) != NULL)
#define GST_PAD_CAN_PULL(pad) (GST_IS_REAL_PAD(pad) && GST_REAL_PAD(pad)->pullfunc != NULL)
/***** PadTemplate *****/
#define GST_TYPE_PADTEMPLATE (gst_padtemplate_get_type ())
#define GST_PADTEMPLATE(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_PADTEMPLATE,GstPadTemplate))
#define GST_PADTEMPLATE_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_PADTEMPLATE,GstPadTemplateClass))
#define GST_IS_PADTEMPLATE(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_PADTEMPLATE))
#define GST_IS_PADTEMPLATE_CLASS(obj) (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_PADTEMPLATE))
typedef enum {
GST_PAD_ALWAYS,
GST_PAD_SOMETIMES,
GST_PAD_REQUEST,
} GstPadPresence;
#define GST_PADTEMPLATE_NAME_TEMPLATE(templ) (((GstPadTemplate *)(templ))->name_template)
#define GST_PADTEMPLATE_DIRECTION(templ) (((GstPadTemplate *)(templ))->direction)
#define GST_PADTEMPLATE_PRESENCE(templ) (((GstPadTemplate *)(templ))->presence)
#define GST_PADTEMPLATE_CAPS(templ) (((GstPadTemplate *)(templ))->caps)
struct _GstPadTemplate {
GstObject object;
gchar *name_template;
GstPadDirection direction;
GstPadPresence presence;
GstCaps *caps;
};
struct _GstPadTemplateClass {
GstObjectClass parent_class;
/* signal callbacks */
void (*pad_created) (GstPadTemplate *templ, GstPad *pad);
};
#define GST_PADTEMPLATE_NEW(padname, dir, pres, a...) \
gst_padtemplate_new ( \
padname, \
dir, \
pres, \
a , \
NULL)
#define GST_PADTEMPLATE_FACTORY(name, padname, dir, pres, a...) \
static GstPadTemplate* \
name (void) \
{ \
static GstPadTemplate *templ = NULL; \
if (!templ) { \
templ = GST_PADTEMPLATE_NEW ( \
padname, \
dir, \
pres, \
a ); \
} \
return templ; \
}
#define GST_PADTEMPLATE_GET(fact) (fact)()
GType gst_pad_get_type (void);
GType gst_real_pad_get_type (void);
GType gst_ghost_pad_get_type (void);
GstPad* gst_pad_new (gchar *name, GstPadDirection direction);
#define gst_pad_destroy(pad) gst_object_destroy (GST_OBJECT (pad))
GstPad* gst_pad_new_from_template (GstPadTemplate *templ, gchar *name);
GstPadDirection gst_pad_get_direction (GstPad *pad);
void gst_pad_set_chain_function (GstPad *pad, GstPadChainFunction chain);
void gst_pad_set_get_function (GstPad *pad, GstPadGetFunction get);
void gst_pad_set_getregion_function (GstPad *pad, GstPadGetRegionFunction getregion);
void gst_pad_set_qos_function (GstPad *pad, GstPadQoSFunction qos);
void gst_pad_set_eos_function (GstPad *pad, GstPadEOSFunction eos);
void gst_pad_set_negotiate_function (GstPad *pad, GstPadNegotiateFunction nego);
void gst_pad_set_newcaps_function (GstPad *pad, GstPadNewCapsFunction newcaps);
void gst_pad_set_bufferpool_function (GstPad *pad, GstPadBufferPoolFunction bufpool);
gboolean gst_pad_set_caps (GstPad *pad, GstCaps *caps);
GstCaps* gst_pad_get_caps (GstPad *pad);
GstCaps* gst_pad_get_padtemplate_caps (GstPad *pad);
gboolean gst_pad_check_compatibility (GstPad *srcpad, GstPad *sinkpad);
void gst_pad_set_element_private (GstPad *pad, gpointer priv);
gpointer gst_pad_get_element_private (GstPad *pad);
void gst_pad_set_name (GstPad *pad, const gchar *name);
const gchar* gst_pad_get_name (GstPad *pad);
void gst_pad_set_parent (GstPad *pad, GstObject *parent);
GstElement* gst_pad_get_parent (GstPad *pad);
GstElement* gst_pad_get_real_parent (GstPad *pad);
void gst_pad_set_sched (GstPad *pad, GstSchedule *sched);
GstSchedule* gst_pad_get_sched (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_padtemplate (GstPad *pad);
GstPad* gst_pad_get_peer (GstPad *pad);
GstBufferPool* gst_pad_get_bufferpool (GstPad *pad);
gboolean gst_pad_connect (GstPad *srcpad, GstPad *sinkpad);
void gst_pad_disconnect (GstPad *srcpad, GstPad *sinkpad);
gboolean gst_pad_renegotiate (GstPad *pad);
GstPadNegotiateReturn gst_pad_negotiate_proxy (GstPad *srcpad, GstPad *destpad, GstCaps **caps);
#if 1
void gst_pad_push (GstPad *pad, GstBuffer *buf);
#else
#define gst_pad_push(pad,buf) G_STMT_START{ \
if (((GstRealPad *)(pad))->peer->pushfunc) \
(((GstRealPad *)(pad))->peer->pushfunc)((GstPad *)(((GstRealPad *)(pad))->peer),(buf)); \
}G_STMT_END
#endif
#if 1
GstBuffer* gst_pad_pull (GstPad *pad);
GstBuffer* gst_pad_pullregion (GstPad *pad, GstRegionType type, guint64 offset, guint64 len);
#else
#define gst_pad_pull(pad) \
( (((GstRealPad *)(pad))->peer->pullfunc) ? \
(((GstRealPad *)(pad))->peer->pullfunc)((GstPad *)(((GstRealPad *)(pad))->peer)) : \
NULL )
#define gst_pad_pullregion(pad,type,offset,len) \
( (((GstRealPad *)(pad))->peer->pullregionfunc) ? \
(((GstRealPad *)(pad))->peer->pullregionfunc)((GstPad *)(((GstRealPad *)(pad))->peer),(type),(offset),(len)) : \
NULL )
#endif
#define gst_pad_eos(pad) (GST_RPAD_EOSFUNC(GST_RPAD_PEER(pad))(GST_PAD(GST_RPAD_PEER(pad))))
gboolean gst_pad_set_eos (GstPad *pad);
gboolean gst_pad_eos_func (GstPad *pad);
void gst_pad_handle_qos (GstPad *pad, glong qos_message);
void gst_pad_load_and_connect (xmlNodePtr self, GstObject *parent);
/* ghostpads */
GstPad * gst_ghost_pad_new (gchar *name,GstPad *pad);
/* templates and factories */
GType gst_padtemplate_get_type (void);
GstPadTemplate* gst_padtemplate_new (gchar *name_template,
GstPadDirection direction, GstPadPresence presence,
GstCaps *caps, ...);
GstCaps* gst_padtemplate_get_caps (GstPadTemplate *templ);
GstCaps* gst_padtemplate_get_caps_by_name (GstPadTemplate *templ, const gchar *name);
xmlNodePtr gst_padtemplate_save_thyself (GstPadTemplate *templ, xmlNodePtr parent);
GstPadTemplate* gst_padtemplate_load_thyself (xmlNodePtr parent);
#ifdef __cplusplus
}
#endif /* __cplusplus */
#endif /* __GST_PAD_H__ */
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