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Original commit message from CVS: * gst/gstghostpad.c: (gst_ghost_pad_get_internal), (gst_ghost_pad_do_activate_push): Activating a ghostpad with no internal pad in push mode is ok.
856 lines
20 KiB
C
856 lines
20 KiB
C
/* GStreamer
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* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
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* 2000 Wim Taymans <wtay@chello.be>
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* 2005 Andy Wingo <wingo@pobox.com>
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*
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* gstghostpad.c: Proxy pads
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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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/**
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* SECTION:gstghostpad
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* @short_description: Pseudo link pads
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* @see_also: #GstPad
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*
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*/
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#include "gst_private.h"
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#include "gstghostpad.h"
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#define GST_TYPE_PROXY_PAD (gst_proxy_pad_get_type ())
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#define GST_IS_PROXY_PAD(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_PROXY_PAD))
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#define GST_IS_PROXY_PAD_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_PROXY_PAD))
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#define GST_PROXY_PAD(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_PROXY_PAD, GstProxyPad))
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#define GST_PROXY_PAD_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_PROXY_PAD, GstProxyPadClass))
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#define GST_PROXY_PAD_TARGET(pad) (GST_PROXY_PAD (pad)->target)
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typedef struct _GstProxyPad GstProxyPad;
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typedef struct _GstProxyPadClass GstProxyPadClass;
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#define GST_PROXY_GET_LOCK(pad) (GST_PROXY_PAD (pad)->proxy_lock)
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#define GST_PROXY_LOCK(pad) (g_mutex_lock (GST_PROXY_GET_LOCK (pad)))
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#define GST_PROXY_UNLOCK(pad) (g_mutex_unlock (GST_PROXY_GET_LOCK (pad)))
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struct _GstProxyPad
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{
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GstPad pad;
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/* with PROXY_LOCK */
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GMutex *proxy_lock;
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GstPad *target;
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/*< private > */
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gpointer _gst_reserved[1];
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};
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struct _GstProxyPadClass
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{
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GstPadClass parent_class;
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/*< private > */
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gpointer _gst_reserved[1];
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};
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G_DEFINE_TYPE (GstProxyPad, gst_proxy_pad, GST_TYPE_PAD);
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static GstPad *gst_proxy_pad_get_target (GstPad * pad);
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static void gst_proxy_pad_dispose (GObject * object);
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static void gst_proxy_pad_finalize (GObject * object);
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#ifndef GST_DISABLE_LOADSAVE
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static xmlNodePtr gst_proxy_pad_save_thyself (GstObject * object,
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xmlNodePtr parent);
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#endif
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static void
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gst_proxy_pad_class_init (GstProxyPadClass * klass)
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{
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GObjectClass *gobject_class = (GObjectClass *) klass;
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gobject_class->dispose = GST_DEBUG_FUNCPTR (gst_proxy_pad_dispose);
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gobject_class->finalize = GST_DEBUG_FUNCPTR (gst_proxy_pad_finalize);
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#ifndef GST_DISABLE_LOADSAVE
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{
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GstObjectClass *gstobject_class = (GstObjectClass *) klass;
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gstobject_class->save_thyself =
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GST_DEBUG_FUNCPTR (gst_proxy_pad_save_thyself);
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}
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#endif
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}
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const GstQueryType *
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gst_proxy_pad_do_query_type (GstPad * pad)
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{
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GstPad *target = gst_proxy_pad_get_target (pad);
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const GstQueryType *res;
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g_return_val_if_fail (target != NULL, NULL);
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res = gst_pad_get_query_types (target);
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gst_object_unref (target);
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return res;
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}
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static gboolean
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gst_proxy_pad_do_event (GstPad * pad, GstEvent * event)
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{
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gboolean res;
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GstPad *target = gst_proxy_pad_get_target (pad);
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g_return_val_if_fail (target != NULL, FALSE);
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res = gst_pad_send_event (target, event);
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gst_object_unref (target);
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return res;
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}
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static gboolean
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gst_proxy_pad_do_query (GstPad * pad, GstQuery * query)
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{
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gboolean res;
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GstPad *target = gst_proxy_pad_get_target (pad);
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g_return_val_if_fail (target != NULL, FALSE);
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res = gst_pad_query (target, query);
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gst_object_unref (target);
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return res;
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}
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static GList *
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gst_proxy_pad_do_internal_link (GstPad * pad)
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{
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GstPad *target = gst_proxy_pad_get_target (pad);
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GList *res;
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g_return_val_if_fail (target != NULL, NULL);
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res = gst_pad_get_internal_links (target);
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gst_object_unref (target);
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return res;
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}
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static GstFlowReturn
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gst_proxy_pad_do_bufferalloc (GstPad * pad, guint64 offset, guint size,
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GstCaps * caps, GstBuffer ** buf)
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{
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GstFlowReturn result;
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GstPad *target = gst_proxy_pad_get_target (pad);
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GstPad *peer;
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g_return_val_if_fail (target != NULL, GST_FLOW_NOT_LINKED);
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peer = gst_pad_get_peer (target);
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if (peer) {
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GST_DEBUG ("buffer alloc on %s:%s", GST_DEBUG_PAD_NAME (target));
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result = gst_pad_alloc_buffer (peer, offset, size, caps, buf);
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gst_object_unref (peer);
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} else {
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result = GST_FLOW_NOT_LINKED;
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}
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gst_object_unref (target);
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return result;
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}
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static GstFlowReturn
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gst_proxy_pad_do_chain (GstPad * pad, GstBuffer * buffer)
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{
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GstPad *target = gst_proxy_pad_get_target (pad);
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GstFlowReturn res;
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g_return_val_if_fail (target != NULL, GST_FLOW_NOT_LINKED);
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res = gst_pad_chain (target, buffer);
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gst_object_unref (target);
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return res;
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}
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static GstFlowReturn
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gst_proxy_pad_do_getrange (GstPad * pad, guint64 offset, guint size,
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GstBuffer ** buffer)
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{
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GstPad *target = gst_proxy_pad_get_target (pad);
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GstFlowReturn res;
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g_return_val_if_fail (target != NULL, GST_FLOW_NOT_LINKED);
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res = gst_pad_get_range (target, offset, size, buffer);
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gst_object_unref (target);
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return res;
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}
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static gboolean
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gst_proxy_pad_do_checkgetrange (GstPad * pad)
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{
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gboolean result;
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GstPad *target = gst_proxy_pad_get_target (pad);
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GstPad *peer;
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g_return_val_if_fail (target != NULL, FALSE);
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peer = gst_pad_get_peer (target);
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if (peer) {
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result = gst_pad_check_pull_range (peer);
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gst_object_unref (peer);
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} else {
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result = FALSE;
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}
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gst_object_unref (target);
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return result;
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}
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static GstCaps *
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gst_proxy_pad_do_getcaps (GstPad * pad)
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{
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GstPad *target = gst_proxy_pad_get_target (pad);
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GstCaps *res;
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g_return_val_if_fail (target != NULL, NULL);
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res = gst_pad_get_caps (target);
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gst_object_unref (target);
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return res;
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}
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static gboolean
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gst_proxy_pad_do_acceptcaps (GstPad * pad, GstCaps * caps)
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{
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GstPad *target = gst_proxy_pad_get_target (pad);
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gboolean res;
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g_return_val_if_fail (target != NULL, FALSE);
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res = gst_pad_accept_caps (target, caps);
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gst_object_unref (target);
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return res;
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}
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static void
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gst_proxy_pad_do_fixatecaps (GstPad * pad, GstCaps * caps)
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{
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GstPad *target = gst_proxy_pad_get_target (pad);
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g_return_if_fail (target != NULL);
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gst_pad_fixate_caps (target, caps);
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gst_object_unref (target);
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}
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static gboolean
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gst_proxy_pad_do_setcaps (GstPad * pad, GstCaps * caps)
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{
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GstPad *target = gst_proxy_pad_get_target (pad);
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gboolean res;
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g_return_val_if_fail (target != NULL, FALSE);
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res = gst_pad_set_caps (target, caps);
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gst_object_unref (target);
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return res;
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}
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#define SETFUNC(member, kind) \
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if (target->member) \
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gst_pad_set_##kind##_function (pad, gst_proxy_pad_do_##kind)
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static gboolean
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gst_proxy_pad_set_target_unlocked (GstPad * pad, GstPad * target)
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{
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GstPad *oldtarget;
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GST_DEBUG ("set target %s:%s on %s:%s",
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GST_DEBUG_PAD_NAME (target), GST_DEBUG_PAD_NAME (pad));
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/* clear old target */
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if ((oldtarget = GST_PROXY_PAD_TARGET (pad))) {
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gst_object_unref (oldtarget);
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GST_PROXY_PAD_TARGET (pad) = NULL;
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}
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if (target) {
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/* set and ref new target if any */
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GST_PROXY_PAD_TARGET (pad) = gst_object_ref (target);
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/* really, all these should have default implementations so I can set them
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* in the _init() instead of here */
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SETFUNC (querytypefunc, query_type);
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SETFUNC (eventfunc, event);
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SETFUNC (queryfunc, query);
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SETFUNC (intlinkfunc, internal_link);
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SETFUNC (getcapsfunc, getcaps);
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SETFUNC (acceptcapsfunc, acceptcaps);
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SETFUNC (fixatecapsfunc, fixatecaps);
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SETFUNC (setcapsfunc, setcaps);
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if (GST_PAD_DIRECTION (pad) == GST_PAD_SINK) {
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SETFUNC (bufferallocfunc, bufferalloc);
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SETFUNC (chainfunc, chain);
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} else {
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SETFUNC (getrangefunc, getrange);
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SETFUNC (checkgetrangefunc, checkgetrange);
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}
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}
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return TRUE;
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}
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static gboolean
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gst_proxy_pad_set_target (GstPad * pad, GstPad * target)
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{
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gboolean result;
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GST_PROXY_LOCK (pad);
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result = gst_proxy_pad_set_target_unlocked (pad, target);
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GST_PROXY_UNLOCK (pad);
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return result;
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}
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static GstPad *
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gst_proxy_pad_get_target (GstPad * pad)
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{
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GstPad *target;
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GST_PROXY_LOCK (pad);
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target = GST_PROXY_PAD_TARGET (pad);
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gst_object_ref (target);
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GST_PROXY_UNLOCK (pad);
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return target;
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}
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static void
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gst_proxy_pad_init (GstProxyPad * pad)
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{
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pad->proxy_lock = g_mutex_new ();
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}
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static void
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gst_proxy_pad_dispose (GObject * object)
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{
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GstPad *pad = GST_PAD (object);
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GST_PROXY_LOCK (pad);
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gst_object_replace ((GstObject **) & GST_PROXY_PAD_TARGET (pad), NULL);
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GST_PROXY_UNLOCK (pad);
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G_OBJECT_CLASS (gst_proxy_pad_parent_class)->dispose (object);
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}
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static void
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gst_proxy_pad_finalize (GObject * object)
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{
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GstProxyPad *pad = GST_PROXY_PAD (object);
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g_mutex_free (pad->proxy_lock);
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pad->proxy_lock = NULL;
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G_OBJECT_CLASS (gst_proxy_pad_parent_class)->finalize (object);
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}
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#ifndef GST_DISABLE_LOADSAVE
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/**
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* gst_proxy_pad_save_thyself:
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* @pad: a ghost #GstPad to save.
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* @parent: the parent #xmlNodePtr to save the description in.
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*
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* Saves the ghost pad into an xml representation.
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*
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* Returns: the #xmlNodePtr representation of the pad.
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*/
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static xmlNodePtr
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gst_proxy_pad_save_thyself (GstObject * object, xmlNodePtr parent)
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{
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xmlNodePtr self;
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g_return_val_if_fail (GST_IS_PROXY_PAD (object), NULL);
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self = xmlNewChild (parent, NULL, (xmlChar *) "ghostpad", NULL);
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xmlNewChild (self, NULL, (xmlChar *) "name",
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(xmlChar *) GST_OBJECT_NAME (object));
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xmlNewChild (self, NULL, (xmlChar *) "parent",
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(xmlChar *) GST_OBJECT_NAME (GST_OBJECT_PARENT (object)));
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/* FIXME FIXME FIXME! */
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return self;
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}
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#endif /* GST_DISABLE_LOADSAVE */
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/***********************************************************************
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* Ghost pads, implemented as a pair of proxy pads (sort of)
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*/
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struct _GstGhostPad
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{
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GstProxyPad pad;
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/* with PROXY_LOCK */
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GstPad *internal;
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gulong notify_id;
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/*< private > */
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gpointer _gst_reserved[GST_PADDING];
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};
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struct _GstGhostPadClass
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{
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GstProxyPadClass parent_class;
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/*< private > */
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gpointer _gst_reserved[GST_PADDING];
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};
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G_DEFINE_TYPE (GstGhostPad, gst_ghost_pad, GST_TYPE_PROXY_PAD);
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static gboolean gst_ghost_pad_set_internal (GstGhostPad * pad,
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GstPad * internal);
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static void gst_ghost_pad_dispose (GObject * object);
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/* Work around g_logv's use of G_GNUC_PRINTF because gcc chokes on %P, which we
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* use for GST_PTR_FORMAT. */
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static void
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gst_critical (const gchar * format, ...)
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{
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va_list args;
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va_start (args, format);
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g_logv (G_LOG_DOMAIN, G_LOG_LEVEL_CRITICAL, format, args);
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va_end (args);
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}
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static GstPad *
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gst_ghost_pad_get_internal (GstPad * pad)
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{
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GstPad *internal;
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GST_PROXY_LOCK (pad);
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internal = GST_GHOST_PAD (pad)->internal;
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if (internal)
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gst_object_ref (internal);
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GST_PROXY_UNLOCK (pad);
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return internal;
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}
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static void
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gst_ghost_pad_class_init (GstGhostPadClass * klass)
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{
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GObjectClass *gobject_class = (GObjectClass *) klass;
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gobject_class->dispose = GST_DEBUG_FUNCPTR (gst_ghost_pad_dispose);
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}
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/* see gstghostpad design docs */
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static gboolean
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gst_ghost_pad_internal_do_activate_push (GstPad * pad, gboolean active)
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{
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gboolean ret;
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if (GST_PAD_DIRECTION (pad) == GST_PAD_SINK) {
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GstPad *parent = GST_PAD (gst_object_get_parent (GST_OBJECT (pad)));
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if (parent) {
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g_return_val_if_fail (GST_IS_GHOST_PAD (parent), FALSE);
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ret = gst_pad_activate_push (parent, active);
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gst_object_unref (parent);
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} else {
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ret = FALSE;
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}
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} else {
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GstPad *peer = gst_pad_get_peer (pad);
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if (peer) {
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ret = gst_pad_activate_push (peer, active);
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gst_object_unref (peer);
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} else {
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ret = FALSE;
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}
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}
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return ret;
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}
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static gboolean
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gst_ghost_pad_internal_do_activate_pull (GstPad * pad, gboolean active)
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{
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gboolean ret;
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if (GST_PAD_DIRECTION (pad) == GST_PAD_SINK) {
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GstPad *peer = gst_pad_get_peer (pad);
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if (peer) {
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ret = gst_pad_activate_pull (peer, active);
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gst_object_unref (peer);
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} else {
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ret = FALSE;
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}
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} else {
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GstPad *parent = GST_PAD (gst_object_get_parent (GST_OBJECT (pad)));
|
|
|
|
if (parent) {
|
|
g_return_val_if_fail (GST_IS_GHOST_PAD (parent), FALSE);
|
|
|
|
ret = gst_pad_activate_pull (parent, active);
|
|
|
|
gst_object_unref (parent);
|
|
} else {
|
|
ret = FALSE;
|
|
}
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static gboolean
|
|
gst_ghost_pad_do_activate_push (GstPad * pad, gboolean active)
|
|
{
|
|
gboolean ret;
|
|
|
|
if (GST_PAD_DIRECTION (pad) == GST_PAD_SINK) {
|
|
GstPad *internal = gst_ghost_pad_get_internal (pad);
|
|
|
|
if (internal) {
|
|
ret = gst_pad_activate_push (internal, active);
|
|
gst_object_unref (internal);
|
|
} else {
|
|
ret = TRUE;
|
|
}
|
|
} else {
|
|
ret = TRUE;
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static gboolean
|
|
gst_ghost_pad_do_activate_pull (GstPad * pad, gboolean active)
|
|
{
|
|
gboolean ret;
|
|
|
|
if (GST_PAD_DIRECTION (pad) == GST_PAD_SINK) {
|
|
GstPad *peer = gst_pad_get_peer (pad);
|
|
|
|
if (peer) {
|
|
ret = gst_pad_activate_pull (peer, active);
|
|
gst_object_unref (peer);
|
|
} else {
|
|
ret = FALSE;
|
|
}
|
|
} else {
|
|
GstPad *internal = gst_ghost_pad_get_internal (pad);
|
|
|
|
if (internal) {
|
|
ret = gst_pad_activate_pull (internal, active);
|
|
gst_object_unref (internal);
|
|
} else {
|
|
ret = FALSE;
|
|
}
|
|
}
|
|
|
|
return ret;
|
|
}
|
|
|
|
static GstPadLinkReturn
|
|
gst_ghost_pad_do_link (GstPad * pad, GstPad * peer)
|
|
{
|
|
GstPad *internal, *target;
|
|
GstPadLinkReturn ret;
|
|
|
|
target = gst_proxy_pad_get_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), NULL);
|
|
|
|
gst_proxy_pad_set_target (internal, peer);
|
|
gst_ghost_pad_set_internal (GST_GHOST_PAD (pad), internal);
|
|
|
|
if (GST_PAD_IS_SRC (internal))
|
|
ret = gst_pad_link (internal, target);
|
|
else
|
|
ret = gst_pad_link (target, internal);
|
|
|
|
gst_object_unref (target);
|
|
|
|
if (ret == GST_PAD_LINK_OK)
|
|
gst_pad_set_active (internal, GST_PAD_ACTIVATE_MODE (pad));
|
|
else
|
|
gst_ghost_pad_set_internal (GST_GHOST_PAD (pad), NULL);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void
|
|
gst_ghost_pad_do_unlink (GstPad * pad)
|
|
{
|
|
GstPad *target = gst_proxy_pad_get_target (pad);
|
|
|
|
g_return_if_fail (target != NULL);
|
|
|
|
GST_DEBUG_OBJECT (pad, "unlinking ghostpad");
|
|
|
|
if (target->unlinkfunc)
|
|
target->unlinkfunc (target);
|
|
|
|
gst_ghost_pad_set_internal (GST_GHOST_PAD (pad), NULL);
|
|
|
|
gst_object_unref (target);
|
|
}
|
|
|
|
static void
|
|
on_int_notify (GstPad * internal, GParamSpec * unused, GstGhostPad * pad)
|
|
{
|
|
GstCaps *caps;
|
|
|
|
g_object_get (internal, "caps", &caps, NULL);
|
|
|
|
GST_LOCK (pad);
|
|
gst_caps_replace (&(GST_PAD_CAPS (pad)), caps);
|
|
GST_UNLOCK (pad);
|
|
|
|
g_object_notify (G_OBJECT (pad), "caps");
|
|
if (caps)
|
|
gst_caps_unref (caps);
|
|
}
|
|
|
|
static gboolean
|
|
gst_ghost_pad_set_internal (GstGhostPad * pad, GstPad * internal)
|
|
{
|
|
GST_PROXY_LOCK (pad);
|
|
/* first remove old internal pad */
|
|
if (pad->internal) {
|
|
GstPad *intpeer;
|
|
|
|
gst_pad_set_activatepull_function (pad->internal, NULL);
|
|
gst_pad_set_activatepush_function (pad->internal, NULL);
|
|
|
|
g_signal_handler_disconnect (pad->internal, pad->notify_id);
|
|
|
|
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 (intpeer);
|
|
}
|
|
/* should dispose it */
|
|
gst_object_unparent (GST_OBJECT_CAST (pad->internal));
|
|
}
|
|
|
|
/* then set new internal pad */
|
|
if (internal) {
|
|
if (!gst_object_set_parent (GST_OBJECT_CAST (internal),
|
|
GST_OBJECT_CAST (pad)))
|
|
goto could_not_set;
|
|
|
|
/* could be more general here, iterating over all writable properties...
|
|
* taking the short road for now tho */
|
|
pad->notify_id = g_signal_connect (internal, "notify::caps",
|
|
G_CALLBACK (on_int_notify), pad);
|
|
on_int_notify (internal, NULL, pad);
|
|
gst_pad_set_activatepull_function (GST_PAD (internal),
|
|
gst_ghost_pad_internal_do_activate_pull);
|
|
gst_pad_set_activatepush_function (GST_PAD (internal),
|
|
gst_ghost_pad_internal_do_activate_push);
|
|
/* a ref was taken by set_parent */
|
|
}
|
|
pad->internal = internal;
|
|
|
|
GST_PROXY_UNLOCK (pad);
|
|
|
|
return TRUE;
|
|
|
|
/* ERRORS */
|
|
could_not_set:
|
|
{
|
|
gst_critical ("Could not set internal pad %" GST_PTR_FORMAT, internal);
|
|
GST_PROXY_UNLOCK (pad);
|
|
return FALSE;
|
|
}
|
|
}
|
|
|
|
static void
|
|
gst_ghost_pad_init (GstGhostPad * pad)
|
|
{
|
|
gst_pad_set_activatepull_function (GST_PAD (pad),
|
|
gst_ghost_pad_do_activate_pull);
|
|
gst_pad_set_activatepush_function (GST_PAD (pad),
|
|
gst_ghost_pad_do_activate_push);
|
|
}
|
|
|
|
static void
|
|
gst_ghost_pad_dispose (GObject * object)
|
|
{
|
|
gst_ghost_pad_set_internal (GST_GHOST_PAD (object), NULL);
|
|
|
|
G_OBJECT_CLASS (gst_ghost_pad_parent_class)->dispose (object);
|
|
}
|
|
|
|
/**
|
|
* gst_ghost_pad_new_notarget:
|
|
* @name: the name of the new pad, or NULL to assign a default name.
|
|
* @dir: the direction of the ghostpad
|
|
*
|
|
* Create a new ghostpad without a target with the given direction.
|
|
* A target can be set on the ghostpad later with the
|
|
* #gst_ghost_pad_set_target() function.
|
|
*
|
|
* The created ghostpad will not have a padtemplate.
|
|
*
|
|
* Returns: a new #GstPad, or NULL in case of an error.
|
|
*/
|
|
GstPad *
|
|
gst_ghost_pad_new_notarget (const gchar * name, GstPadDirection dir)
|
|
{
|
|
GstPad *ret;
|
|
|
|
ret = g_object_new (GST_TYPE_GHOST_PAD, "name", name, "direction", dir, NULL);
|
|
|
|
gst_pad_set_activatepush_function (ret, gst_ghost_pad_do_activate_push);
|
|
gst_pad_set_link_function (ret, gst_ghost_pad_do_link);
|
|
gst_pad_set_unlink_function (ret, gst_ghost_pad_do_unlink);
|
|
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* gst_ghost_pad_new:
|
|
* @name: the name of the new pad, or NULL to assign a default name.
|
|
* @target: the pad to ghost.
|
|
*
|
|
* Create a new ghostpad with @target as the target. The direction and
|
|
* padtemplate will be taken from the target pad.
|
|
*
|
|
* 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);
|
|
|
|
if ((ret = gst_ghost_pad_new_notarget (name, GST_PAD_DIRECTION (target)))) {
|
|
g_object_set (G_OBJECT (ret),
|
|
"template", GST_PAD_PAD_TEMPLATE (target), NULL);
|
|
gst_ghost_pad_set_target (GST_GHOST_PAD (ret), target);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* gst_ghost_pad_get_target:
|
|
* @gpad: the #GstGhostpad
|
|
*
|
|
* Get the target pad of #gpad. Unref after usage.
|
|
*
|
|
* Returns: the target #GstPad, can be NULL if the ghostpad
|
|
* has no target set. Unref after usage.
|
|
*/
|
|
GstPad *
|
|
gst_ghost_pad_get_target (GstGhostPad * gpad)
|
|
{
|
|
g_return_val_if_fail (GST_IS_GHOST_PAD (gpad), NULL);
|
|
|
|
return gst_proxy_pad_get_target (GST_PAD_CAST (gpad));
|
|
}
|
|
|
|
/**
|
|
* gst_ghost_pad_set_target:
|
|
* @gpad: the #GstGhostpad
|
|
* @newtarget: the new pad target
|
|
*
|
|
* Set the new target of the ghostpad @gpad. Any existing target
|
|
* is unlinked.
|
|
*
|
|
* Returns: TRUE if the new target could be set, FALSE otherwise.
|
|
*/
|
|
gboolean
|
|
gst_ghost_pad_set_target (GstGhostPad * gpad, GstPad * newtarget)
|
|
{
|
|
GstPad *internal;
|
|
GstPad *oldtarget;
|
|
gboolean result;
|
|
|
|
g_return_val_if_fail (GST_IS_GHOST_PAD (gpad), FALSE);
|
|
|
|
GST_PROXY_LOCK (gpad);
|
|
internal = gpad->internal;
|
|
|
|
GST_DEBUG ("set target %s:%s on %s:%s",
|
|
GST_DEBUG_PAD_NAME (newtarget), GST_DEBUG_PAD_NAME (gpad));
|
|
|
|
/* clear old target */
|
|
if ((oldtarget = GST_PROXY_PAD_TARGET (gpad))) {
|
|
/* if we have an internal pad, unlink */
|
|
if (internal) {
|
|
if (GST_PAD_IS_SRC (internal))
|
|
gst_pad_unlink (internal, oldtarget);
|
|
else
|
|
gst_pad_unlink (oldtarget, internal);
|
|
}
|
|
}
|
|
|
|
result = gst_proxy_pad_set_target_unlocked (GST_PAD_CAST (gpad), newtarget);
|
|
|
|
if (result && newtarget) {
|
|
/* and link to internal pad if we have one */
|
|
if (internal) {
|
|
if (GST_PAD_IS_SRC (internal))
|
|
result = gst_pad_link (internal, newtarget);
|
|
else
|
|
result = gst_pad_link (newtarget, internal);
|
|
}
|
|
}
|
|
GST_PROXY_UNLOCK (gpad);
|
|
|
|
return result;
|
|
}
|