gstreamer/gst/gstghostpad.c
Andy Wingo ee38ed3c9d gst/gstghostpad.c (gst_proxy_pad_do_setcaps): Call the full gst_pad_set_caps on the target, not just its setcaps() fu...
Original commit message from CVS:
2005-06-23  Andy Wingo  <wingo@pobox.com>

* gst/gstghostpad.c (gst_proxy_pad_do_setcaps): Call the full
gst_pad_set_caps on the target, not just its setcaps() function.
2005-06-23 09:28:27 +00:00

593 lines
15 KiB
C

/* GStreamer
* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
* 2000 Wim Taymans <wtay@chello.be>
* 2005 Andy Wingo <wingo@pobox.com>
*
* gstghostpad.c: Proxy pads
*
* 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.
*/
#include "gst_private.h"
#include "gstghostpad.h"
#include "gstelement.h"
#include "gstbin.h"
#define GST_TYPE_PROXY_PAD (gst_proxy_pad_get_type ())
#define GST_IS_PROXY_PAD(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_PROXY_PAD))
#define GST_IS_PROXY_PAD_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_PROXY_PAD))
#define GST_PROXY_PAD(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_PROXY_PAD, GstProxyPad))
#define GST_PROXY_PAD_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_PROXY_PAD, GstProxyPadClass))
#define GST_PROXY_PAD_TARGET(pad) (GST_PROXY_PAD (pad)->target)
typedef struct _GstProxyPad GstProxyPad;
typedef struct _GstProxyPadClass GstProxyPadClass;
enum
{
PROXY_PROP_0,
PROXY_PROP_TARGET
};
struct _GstProxyPad
{
GstPad pad;
GstPad *target;
GMutex *property_lock;
/*< private > */
gpointer _gst_reserved[1];
};
struct _GstProxyPadClass
{
GstPadClass parent_class;
/*< private > */
gpointer _gst_reserved[1];
};
G_DEFINE_TYPE (GstProxyPad, gst_proxy_pad, GST_TYPE_PAD);
static void gst_proxy_pad_dispose (GObject * object);
static void gst_proxy_pad_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_proxy_pad_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
static void gst_proxy_pad_finalize (GObject * object);
#ifndef GST_DISABLE_LOADSAVE
static xmlNodePtr gst_proxy_pad_save_thyself (GstObject * object,
xmlNodePtr parent);
#endif
static void
gst_proxy_pad_class_init (GstProxyPadClass * klass)
{
GObjectClass *gobject_class = (GObjectClass *) klass;
gobject_class->dispose = GST_DEBUG_FUNCPTR (gst_proxy_pad_dispose);
gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_proxy_pad_finalize);
gobject_class->set_property = GST_DEBUG_FUNCPTR (gst_proxy_pad_set_property);
gobject_class->get_property = GST_DEBUG_FUNCPTR (gst_proxy_pad_get_property);
g_object_class_install_property (G_OBJECT_CLASS (klass), PROXY_PROP_TARGET,
g_param_spec_object ("target", "Target", "The proxy pad's target",
GST_TYPE_PAD, G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY));
#ifndef GST_DISABLE_LOADSAVE
{
GstObjectClass *gstobject_class = (GstObjectClass *) klass;
gstobject_class->save_thyself =
GST_DEBUG_FUNCPTR (gst_proxy_pad_save_thyself);
}
#endif
}
const GstQueryType *
gst_proxy_pad_do_query_type (GstPad * pad)
{
GstPad *target = GST_PROXY_PAD_TARGET (pad);
g_return_val_if_fail (target != NULL, NULL);
return gst_pad_get_query_types (target);
}
static gboolean
gst_proxy_pad_do_event (GstPad * pad, GstEvent * event)
{
GstPad *target = GST_PROXY_PAD_TARGET (pad);
g_return_val_if_fail (target != NULL, FALSE);
return gst_pad_send_event (target, event);
}
static gboolean
gst_proxy_pad_do_query (GstPad * pad, GstQuery * query)
{
GstPad *target = GST_PROXY_PAD_TARGET (pad);
g_return_val_if_fail (target != NULL, FALSE);
return gst_pad_query (target, query);
}
static GList *
gst_proxy_pad_do_internal_link (GstPad * pad)
{
GstPad *target = GST_PROXY_PAD_TARGET (pad);
g_return_val_if_fail (target != NULL, NULL);
return gst_pad_get_internal_links (target);
}
static GstFlowReturn
gst_proxy_pad_do_bufferalloc (GstPad * pad, guint64 offset, guint size,
GstCaps * caps, GstBuffer ** buf)
{
GstPad *target = GST_PROXY_PAD_TARGET (pad);
g_return_val_if_fail (target != NULL, GST_FLOW_UNEXPECTED);
return target->bufferallocfunc (target, offset, size, caps, buf);
}
static gboolean
gst_proxy_pad_do_activate (GstPad * pad, GstActivateMode mode)
{
GstPad *target = GST_PROXY_PAD_TARGET (pad);
g_return_val_if_fail (target != NULL, FALSE);
return gst_pad_set_active (target, mode);
}
static void
gst_proxy_pad_do_loop (GstPad * pad)
{
GstPad *target = GST_PROXY_PAD_TARGET (pad);
g_return_if_fail (target != NULL);
target->loopfunc (target);
}
static GstFlowReturn
gst_proxy_pad_do_chain (GstPad * pad, GstBuffer * buffer)
{
GstPad *target = GST_PROXY_PAD_TARGET (pad);
g_return_val_if_fail (target != NULL, GST_FLOW_UNEXPECTED);
return target->chainfunc (target, buffer);
}
static GstFlowReturn
gst_proxy_pad_do_getrange (GstPad * pad, guint64 offset, guint size,
GstBuffer ** buffer)
{
GstPad *target = GST_PROXY_PAD_TARGET (pad);
g_return_val_if_fail (target != NULL, GST_FLOW_UNEXPECTED);
return target->getrangefunc (target, offset, size, buffer);
}
static gboolean
gst_proxy_pad_do_checkgetrange (GstPad * pad)
{
GstPad *target = GST_PROXY_PAD_TARGET (pad);
g_return_val_if_fail (target != NULL, FALSE);
return target->checkgetrangefunc (target);
}
static GstCaps *
gst_proxy_pad_do_getcaps (GstPad * pad)
{
GstPad *target = GST_PROXY_PAD_TARGET (pad);
g_return_val_if_fail (target != NULL, NULL);
return target->getcapsfunc (target);
}
static gboolean
gst_proxy_pad_do_acceptcaps (GstPad * pad, GstCaps * caps)
{
GstPad *target = GST_PROXY_PAD_TARGET (pad);
g_return_val_if_fail (target != NULL, FALSE);
return target->acceptcapsfunc (target, caps);
}
static GstCaps *
gst_proxy_pad_do_fixatecaps (GstPad * pad, GstCaps * caps)
{
GstPad *target = GST_PROXY_PAD_TARGET (pad);
g_return_val_if_fail (target != NULL, NULL);
return target->fixatecapsfunc (target, caps);
}
static gboolean
gst_proxy_pad_do_setcaps (GstPad * pad, GstCaps * caps)
{
GstPad *target = GST_PROXY_PAD_TARGET (pad);
g_return_val_if_fail (target != NULL, FALSE);
return gst_pad_set_caps (target, caps);
}
#define SETFUNC(member, kind) \
if (target->member) \
gst_pad_set_##kind##_function (pad, gst_proxy_pad_do_##kind)
static void
gst_proxy_pad_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstPad *pad = GST_PAD (object);
switch (prop_id) {
case PROXY_PROP_TARGET:{
GstPad *target;
target = GST_PAD_CAST (gst_object_ref
(GST_OBJECT_CAST (g_value_get_object (value))));
GST_PROXY_PAD_TARGET (object) = target;
/* really, all these should have default implementations so I can set them
* in the _init() instead of here */
SETFUNC (querytypefunc, query_type);
SETFUNC (eventfunc, event);
SETFUNC (queryfunc, query);
SETFUNC (intlinkfunc, internal_link);
SETFUNC (activatefunc, activate);
SETFUNC (loopfunc, loop);
SETFUNC (getcapsfunc, getcaps);
SETFUNC (acceptcapsfunc, acceptcaps);
SETFUNC (fixatecapsfunc, fixatecaps);
SETFUNC (setcapsfunc, setcaps);
if (GST_PAD_DIRECTION (pad) == GST_PAD_SINK) {
SETFUNC (bufferallocfunc, bufferalloc);
SETFUNC (chainfunc, chain);
} else {
SETFUNC (getrangefunc, getrange);
SETFUNC (checkgetrangefunc, checkgetrange);
}
break;
}
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_proxy_pad_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
switch (prop_id) {
case PROXY_PROP_TARGET:
g_value_set_object (value, GST_PROXY_PAD_TARGET (object));
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_proxy_pad_init (GstProxyPad * pad)
{
pad->property_lock = g_mutex_new ();
}
static void
gst_proxy_pad_dispose (GObject * object)
{
GstPad *pad = GST_PAD (object);
if (GST_PROXY_PAD_TARGET (pad)) {
gst_object_replace ((GstObject **) & GST_PROXY_PAD_TARGET (pad), NULL);
}
G_OBJECT_CLASS (gst_proxy_pad_parent_class)->dispose (object);
}
static void
gst_proxy_pad_finalize (GObject * object)
{
GstProxyPad *pad = GST_PROXY_PAD (object);
g_mutex_free (pad->property_lock);
pad->property_lock = NULL;
G_OBJECT_CLASS (gst_proxy_pad_parent_class)->finalize (object);
}
#ifndef GST_DISABLE_LOADSAVE
/**
* gst_proxy_pad_save_thyself:
* @pad: a ghost #GstPad to save.
* @parent: the parent #xmlNodePtr to save the description in.
*
* Saves the ghost pad into an xml representation.
*
* Returns: the #xmlNodePtr representation of the pad.
*/
static xmlNodePtr
gst_proxy_pad_save_thyself (GstObject * object, xmlNodePtr parent)
{
xmlNodePtr self;
g_return_val_if_fail (GST_IS_PROXY_PAD (object), NULL);
self = xmlNewChild (parent, NULL, (xmlChar *) "ghostpad", NULL);
xmlNewChild (self, NULL, (xmlChar *) "name",
(xmlChar *) GST_OBJECT_NAME (object));
xmlNewChild (self, NULL, (xmlChar *) "parent",
(xmlChar *) GST_OBJECT_NAME (GST_OBJECT_PARENT (object)));
/* FIXME FIXME FIXME! */
return self;
}
#endif /* GST_DISABLE_LOADSAVE */
/***********************************************************************
* Ghost pads, implemented as a pair of proxy pads (sort of)
*/
enum
{
GHOST_PROP_0,
GHOST_PROP_INTERNAL
};
struct _GstGhostPad
{
GstProxyPad pad;
GstPad *internal;
/*< private > */
gpointer _gst_reserved[1];
};
struct _GstGhostPadClass
{
GstProxyPadClass parent_class;
/*< private > */
gpointer _gst_reserved[1];
};
G_DEFINE_TYPE (GstGhostPad, gst_ghost_pad, GST_TYPE_PROXY_PAD);
static void gst_ghost_pad_dispose (GObject * object);
static void gst_ghost_pad_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec);
static void gst_ghost_pad_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec);
/* Work around g_logv's use of G_GNUC_PRINTF because gcc chokes on %P, which we
* use for GST_PTR_FORMAT. */
static void
gst_critical (const gchar * format, ...)
{
va_list args;
va_start (args, format);
g_logv (G_LOG_DOMAIN, G_LOG_LEVEL_CRITICAL, format, args);
va_end (args);
}
static void
gst_ghost_pad_class_init (GstGhostPadClass * klass)
{
GObjectClass *gobject_class = (GObjectClass *) klass;
gobject_class->dispose = GST_DEBUG_FUNCPTR (gst_ghost_pad_dispose);
gobject_class->set_property = GST_DEBUG_FUNCPTR (gst_ghost_pad_set_property);
gobject_class->get_property = GST_DEBUG_FUNCPTR (gst_ghost_pad_get_property);
g_object_class_install_property (G_OBJECT_CLASS (klass), GHOST_PROP_INTERNAL,
g_param_spec_object ("internal", "Internal",
"The ghost pad's internal pad", GST_TYPE_PAD, G_PARAM_READWRITE));
}
static GstPadLinkReturn
gst_ghost_pad_do_link (GstPad * pad, GstPad * peer)
{
GstPad *internal, *target;
target = GST_PROXY_PAD_TARGET (pad);
g_return_val_if_fail (target != NULL, GST_PAD_LINK_NOSCHED);
/* proxy the peer into the bin */
internal = g_object_new (GST_TYPE_PROXY_PAD,
"name", NULL,
"direction", GST_PAD_DIRECTION (peer),
"template", GST_PAD_PAD_TEMPLATE (peer), "target", peer, NULL);
g_object_set (pad, "internal", internal, NULL);
if ((GST_PAD_IS_SRC (internal) &&
gst_pad_link (internal, target) == GST_PAD_LINK_OK) ||
(GST_PAD_IS_SINK (internal) &&
(gst_pad_link (target, internal) == GST_PAD_LINK_OK))) {
gst_pad_set_active (internal, GST_PAD_ACTIVATE_MODE (pad));
return GST_PAD_LINK_OK;
} else {
g_object_set (pad, "internal", NULL, NULL);
return GST_PAD_LINK_REFUSED;
}
}
static void
gst_ghost_pad_do_unlink (GstPad * pad)
{
GstPad *target = GST_PROXY_PAD_TARGET (pad);
g_return_if_fail (target != NULL);
if (target->unlinkfunc)
target->unlinkfunc (target);
/* doesn't work with the object locks in the properties dispatcher... */
/* g_object_set (pad, "internal", NULL, NULL); */
}
static void
gst_ghost_pad_set_property (GObject * object, guint prop_id,
const GValue * value, GParamSpec * pspec)
{
GstGhostPad *pad = GST_GHOST_PAD (object);
switch (prop_id) {
case GHOST_PROP_INTERNAL:{
GstPad *internal;
g_mutex_lock (GST_PROXY_PAD (pad)->property_lock);
if (pad->internal) {
GstPad *intpeer;
intpeer = gst_pad_get_peer (pad->internal);
if (intpeer) {
if (GST_PAD_IS_SRC (pad->internal)) {
gst_pad_unlink (pad->internal, intpeer);
} else {
gst_pad_unlink (intpeer, pad->internal);
}
gst_object_unref (GST_OBJECT (intpeer));
}
/* delete me, only here for testing... */
if (GST_OBJECT_REFCOUNT_VALUE (pad->internal) != 1) {
gst_critical ("Refcounting problem: %" GST_PTR_FORMAT, pad->internal);
}
/* should dispose it */
gst_object_unparent (GST_OBJECT_CAST (pad->internal));
}
internal = g_value_get_object (value); /* no extra refcount... */
if (internal) {
if (!gst_object_set_parent (GST_OBJECT_CAST (internal),
GST_OBJECT_CAST (pad))) {
gst_critical ("Could not set internal pad %" GST_PTR_FORMAT,
internal);
g_mutex_unlock (GST_PROXY_PAD (pad)->property_lock);
return;
}
/* a ref was taken by set_parent */
}
pad->internal = internal;
g_mutex_unlock (GST_PROXY_PAD (pad)->property_lock);
break;
}
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_ghost_pad_get_property (GObject * object, guint prop_id,
GValue * value, GParamSpec * pspec)
{
switch (prop_id) {
case GHOST_PROP_INTERNAL:
g_value_set_object (value, GST_GHOST_PAD (object)->internal);
break;
default:
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
break;
}
}
static void
gst_ghost_pad_init (GstGhostPad * pad)
{
/* noop */
}
static void
gst_ghost_pad_dispose (GObject * object)
{
g_object_set (object, "internal", NULL, NULL);
G_OBJECT_CLASS (gst_ghost_pad_parent_class)->dispose (object);
}
/**
* gst_ghost_pad_new:
* @name: the name of the new pad, or NULL to assign a default name.
* @target: the pad to ghost.
*
* Will ref the target.
*
* Returns: a new #GstPad, or NULL in case of an error.
*/
GstPad *
gst_ghost_pad_new (const gchar * name, GstPad * target)
{
GstPad *ret;
g_return_val_if_fail (GST_IS_PAD (target), NULL);
g_return_val_if_fail (!GST_PAD_IS_LINKED (target), NULL);
ret = g_object_new (GST_TYPE_GHOST_PAD,
"name", name,
"direction", GST_PAD_DIRECTION (target),
"template", GST_PAD_PAD_TEMPLATE (target), "target", target, NULL);
gst_pad_set_link_function (ret, gst_ghost_pad_do_link);
gst_pad_set_unlink_function (ret, gst_ghost_pad_do_unlink);
return ret;
}