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15b0278251
Original commit message from CVS: * gst/gst_private.h: * gst/gstbin.c: (gst_bin_class_init), (gst_bin_set_index), (gst_bin_set_clock), (gst_bin_get_clock), (gst_bin_iterate_elements), (gst_bin_get_by_name), (gst_bin_get_by_name_recurse_up), (gst_bin_get_by_interface), (gst_bin_get_all_by_interface): * gst/gstbin.h: * gst/gstelement.c: (gst_element_add_pad), (gst_element_remove_pad), (gst_element_request_pad), (gst_element_post_message), (gst_element_error_full), (gst_element_is_locked_state), (gst_element_set_locked_state), (gst_element_create_task): * gst/gstelement.h: * gst/gstinfo.h: * gst/gstiterator.h: * gst/gstobject.c: (gst_object_init), (gst_object_ref), (gst_object_unref), (gst_object_sink), (gst_object_dispose), (gst_object_finalize), (gst_object_dispatch_properties_changed), (gst_object_set_name), (gst_object_get_name), (gst_object_set_parent), (gst_object_get_parent), (gst_object_unparent), (gst_object_check_uniqueness), (gst_object_save_thyself), (gst_object_restore_thyself), (gst_object_real_restore_thyself), (gst_object_set_property), (gst_object_get_property), (gst_object_get_path_string): * gst/gstobject.h: * gst/gstpad.c: (gst_pad_get_direction), (gst_pad_unlink), (gst_pad_is_linked), (gst_pad_link_filtered), (gst_pad_relink_filtered), (gst_pad_get_peer), (gst_pad_push), (gst_pad_pull), (gst_pad_pull_range): * gst/gstpad.h: More MT safety fixes following the desing doc.
976 lines
26 KiB
C
976 lines
26 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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*
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* gstobject.c: Fundamental class used for all of GStreamer
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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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#include "gst_private.h"
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#include "gstobject.h"
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#include "gstmarshal.h"
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#include "gstinfo.h"
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#ifndef GST_DISABLE_TRACE
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#include "gsttrace.h"
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#endif
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/* Object signals and args */
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enum
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{
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PARENT_SET,
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PARENT_UNSET,
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#ifndef GST_DISABLE_LOADSAVE_REGISTRY
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OBJECT_SAVED,
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#endif
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DEEP_NOTIFY,
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LAST_SIGNAL
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};
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enum
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{
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ARG_0,
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ARG_NAME
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/* FILL ME */
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};
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enum
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{
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SO_OBJECT_LOADED,
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SO_LAST_SIGNAL
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};
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GType _gst_object_type = 0;
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static GHashTable *object_name_counts = NULL;
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G_LOCK_DEFINE_STATIC (object_name_mutex);
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typedef struct _GstSignalObject GstSignalObject;
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typedef struct _GstSignalObjectClass GstSignalObjectClass;
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static GType gst_signal_object_get_type (void);
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static void gst_signal_object_class_init (GstSignalObjectClass * klass);
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static void gst_signal_object_init (GstSignalObject * object);
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#ifndef GST_DISABLE_LOADSAVE_REGISTRY
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static guint gst_signal_object_signals[SO_LAST_SIGNAL] = { 0 };
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#endif
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static void gst_object_class_init (GstObjectClass * klass);
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static void gst_object_init (GstObject * object);
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#ifndef GST_DISABLE_TRACE
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static GObject *gst_object_constructor (GType type,
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guint n_construct_properties, GObjectConstructParam * construct_params);
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#endif
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static void gst_object_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * pspec);
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static void gst_object_get_property (GObject * object, guint prop_id,
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GValue * value, GParamSpec * pspec);
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static void gst_object_dispatch_properties_changed (GObject * object,
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guint n_pspecs, GParamSpec ** pspecs);
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static void gst_object_dispose (GObject * object);
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static void gst_object_finalize (GObject * object);
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#ifndef GST_DISABLE_LOADSAVE_REGISTRY
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static void gst_object_real_restore_thyself (GstObject * object,
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xmlNodePtr self);
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#endif
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static GObjectClass *parent_class = NULL;
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static guint gst_object_signals[LAST_SIGNAL] = { 0 };
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GType
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gst_object_get_type (void)
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{
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if (!_gst_object_type) {
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static const GTypeInfo object_info = {
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sizeof (GstObjectClass),
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NULL,
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NULL,
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(GClassInitFunc) gst_object_class_init,
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NULL,
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NULL,
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sizeof (GstObject),
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0,
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(GInstanceInitFunc) gst_object_init,
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NULL
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};
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_gst_object_type =
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g_type_register_static (G_TYPE_OBJECT, "GstObject", &object_info,
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G_TYPE_FLAG_ABSTRACT);
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}
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return _gst_object_type;
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}
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static void
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gst_object_class_init (GstObjectClass * klass)
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{
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GObjectClass *gobject_class;
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gobject_class = (GObjectClass *) klass;
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parent_class = g_type_class_ref (G_TYPE_OBJECT);
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gobject_class->set_property = GST_DEBUG_FUNCPTR (gst_object_set_property);
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gobject_class->get_property = GST_DEBUG_FUNCPTR (gst_object_get_property);
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g_object_class_install_property (G_OBJECT_CLASS (klass), ARG_NAME,
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g_param_spec_string ("name", "Name", "The name of the object",
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NULL, G_PARAM_READWRITE));
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gst_object_signals[PARENT_SET] =
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g_signal_new ("parent-set", G_TYPE_FROM_CLASS (klass), G_SIGNAL_RUN_LAST,
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G_STRUCT_OFFSET (GstObjectClass, parent_set), NULL, NULL,
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g_cclosure_marshal_VOID__OBJECT, G_TYPE_NONE, 1, G_TYPE_OBJECT);
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gst_object_signals[PARENT_UNSET] =
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g_signal_new ("parent-unset", G_TYPE_FROM_CLASS (klass),
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G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstObjectClass, parent_unset), NULL,
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NULL, g_cclosure_marshal_VOID__OBJECT, G_TYPE_NONE, 1, G_TYPE_OBJECT);
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#ifndef GST_DISABLE_LOADSAVE_REGISTRY
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/* FIXME This should be the GType of xmlNodePtr instead of G_TYPE_POINTER */
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gst_object_signals[OBJECT_SAVED] =
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g_signal_new ("object-saved", G_TYPE_FROM_CLASS (klass),
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G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstObjectClass, object_saved), NULL,
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NULL, g_cclosure_marshal_VOID__POINTER, G_TYPE_NONE, 1, G_TYPE_POINTER);
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klass->restore_thyself = gst_object_real_restore_thyself;
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#endif
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gst_object_signals[DEEP_NOTIFY] =
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g_signal_new ("deep-notify", G_TYPE_FROM_CLASS (klass),
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G_SIGNAL_RUN_FIRST | G_SIGNAL_NO_RECURSE | G_SIGNAL_DETAILED |
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G_SIGNAL_NO_HOOKS, G_STRUCT_OFFSET (GstObjectClass, deep_notify), NULL,
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NULL, gst_marshal_VOID__OBJECT_PARAM, G_TYPE_NONE, 2, G_TYPE_OBJECT,
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G_TYPE_PARAM);
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klass->path_string_separator = "/";
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klass->signal_object = g_object_new (gst_signal_object_get_type (), NULL);
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/* see the comments at gst_object_dispatch_properties_changed */
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gobject_class->dispatch_properties_changed
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= GST_DEBUG_FUNCPTR (gst_object_dispatch_properties_changed);
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gobject_class->dispose = gst_object_dispose;
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gobject_class->finalize = gst_object_finalize;
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#ifndef GST_DISABLE_TRACE
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gobject_class->constructor = gst_object_constructor;
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#endif
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}
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static void
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gst_object_init (GstObject * object)
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{
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object->lock = g_mutex_new ();
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object->parent = NULL;
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object->name = NULL;
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object->flags = 0;
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GST_FLAG_SET (object, GST_OBJECT_FLOATING);
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}
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#ifndef GST_DISABLE_TRACE
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static GObject *
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gst_object_constructor (GType type, guint n_construct_properties,
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GObjectConstructParam * construct_params)
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{
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const gchar *name;
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GstAllocTrace *trace;
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GObject *obj =
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G_OBJECT_CLASS (parent_class)->constructor (type, n_construct_properties,
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construct_params);
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name = g_type_name (type);
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trace = gst_alloc_trace_get (name);
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if (!trace) {
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trace = gst_alloc_trace_register (name);
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}
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gst_alloc_trace_new (trace, obj);
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return obj;
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}
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#endif
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/**
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* gst_object_ref:
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* @object: GstObject to reference
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*
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* Increments the refence count on the object. This function
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* does not take the lock on the object because it relies on
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* atomic refcounting.
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*
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* This object returns the input parameter to ease writing
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* constructs like :
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* result = gst_object_ref (object->parent);
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*
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* Returns: A pointer to the object
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*/
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GstObject *
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gst_object_ref (GstObject * object)
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{
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g_return_val_if_fail (GST_IS_OBJECT (object), NULL);
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GST_CAT_LOG_OBJECT (GST_CAT_REFCOUNTING, object, "ref %d->%d",
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G_OBJECT (object)->ref_count, G_OBJECT (object)->ref_count + 1);
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/* FIXME, not MT safe because glib is not MT safe */
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g_object_ref (G_OBJECT (object));
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return object;
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}
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/**
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* gst_object_unref:
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* @object: GstObject to unreference
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*
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* Decrements the refence count on the object. If reference count hits
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* zero, destroy the object. This function does not take the lock
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* on the object as it relies on atomic refcounting.
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*/
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void
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gst_object_unref (GstObject * object)
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{
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g_return_if_fail (GST_IS_OBJECT (object));
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g_return_if_fail (G_OBJECT (object)->ref_count > 0);
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GST_CAT_LOG_OBJECT (GST_CAT_REFCOUNTING, object, "unref %d->%d",
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G_OBJECT (object)->ref_count, G_OBJECT (object)->ref_count - 1);
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/* FIXME, not MT safe because glib is not MT safe */
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g_object_unref (G_OBJECT (object));
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}
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/**
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* gst_object_sink:
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* @object: GstObject to sink
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*
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* Removes floating reference on an object. Any newly created object has
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* a refcount of 1 and is FLOATING. This function should be used when
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* creating a new object to symbolically 'take ownership' of the object.
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* Use #gst_object_set_parent to have this done for you.
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*
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* This function takes the object lock.
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*
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* MT safe.
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*/
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void
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gst_object_sink (GstObject * object)
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{
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g_return_if_fail (GST_IS_OBJECT (object));
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GST_CAT_LOG_OBJECT (GST_CAT_REFCOUNTING, object, "sink");
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GST_LOCK (object);
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if (GST_OBJECT_IS_FLOATING (object)) {
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GST_FLAG_UNSET (object, GST_OBJECT_FLOATING);
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gst_object_unref (object);
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}
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GST_UNLOCK (object);
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}
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/**
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* gst_object_replace:
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* @oldobj: pointer to place of old GstObject
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* @newobj: new GstObject
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*
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* Unrefs the object pointer to by oldobj, refs the newobj and
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* puts the newobj in *oldobj. Be carefull when calling this
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* function, it does not take any locks. You might want to lock
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* the object owning the oldobj pointer before calling this
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* function.
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*/
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void
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gst_object_replace (GstObject ** oldobj, GstObject * newobj)
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{
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g_return_if_fail (oldobj != NULL);
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g_return_if_fail (*oldobj == NULL || GST_IS_OBJECT (*oldobj));
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g_return_if_fail (newobj == NULL || GST_IS_OBJECT (newobj));
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GST_CAT_LOG (GST_CAT_REFCOUNTING, "replace %s (%d) with %s (%d)",
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*oldobj ? GST_STR_NULL (GST_OBJECT_NAME (*oldobj)) : "(NONE)",
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*oldobj ? G_OBJECT (*oldobj)->ref_count : 0,
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newobj ? GST_STR_NULL (GST_OBJECT_NAME (newobj)) : "(NONE)",
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newobj ? G_OBJECT (newobj)->ref_count : 0);
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if (*oldobj != newobj) {
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if (newobj)
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gst_object_ref (newobj);
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if (*oldobj)
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gst_object_unref (*oldobj);
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*oldobj = newobj;
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}
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}
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static void
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gst_object_dispose (GObject * object)
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{
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GST_CAT_LOG_OBJECT (GST_CAT_REFCOUNTING, object, "dispose");
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GST_FLAG_SET (GST_OBJECT (object), GST_OBJECT_DESTROYED);
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GST_OBJECT_PARENT (object) = NULL;
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parent_class->dispose (object);
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}
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/* finalize is called when the object has to free its resources */
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static void
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gst_object_finalize (GObject * object)
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{
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GstObject *gstobject = GST_OBJECT (object);
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GST_CAT_LOG_OBJECT (GST_CAT_REFCOUNTING, object, "finalize");
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g_signal_handlers_destroy (object);
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g_free (gstobject->name);
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g_mutex_free (gstobject->lock);
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#ifndef GST_DISABLE_TRACE
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{
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const gchar *name;
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GstAllocTrace *trace;
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name = g_type_name (G_OBJECT_TYPE (object));
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trace = gst_alloc_trace_get (name);
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g_assert (trace);
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gst_alloc_trace_free (trace, object);
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}
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#endif
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parent_class->finalize (object);
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}
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/* FIXME a class wide mutex is enough */
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static GStaticRecMutex dispatch_mutex = G_STATIC_REC_MUTEX_INIT;
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/* Changing a GObject property of a GstObject will result in "deep_notify"
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* signals being emitted by the object itself, as well as in each parent
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* object. This is so that an application can connect a listener to the
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* top-level bin to catch property-change notifications for all contained
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* elements. */
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static void
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gst_object_dispatch_properties_changed (GObject * object,
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guint n_pspecs, GParamSpec ** pspecs)
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{
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GstObject *gst_object, *parent, *old_parent;
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guint i;
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const gchar *name;
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g_static_rec_mutex_lock (&dispatch_mutex);
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/* do the standard dispatching */
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G_OBJECT_CLASS (parent_class)->dispatch_properties_changed (object, n_pspecs,
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pspecs);
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/* we fail when this is not a GstObject */
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g_return_if_fail (GST_IS_OBJECT (object));
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gst_object = GST_OBJECT_CAST (object);
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name = gst_object_get_name (gst_object);
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/* now let the parent dispatch those, too */
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parent = gst_object_get_parent (gst_object);
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while (parent) {
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/* for debugging ... */
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gchar *parent_name = gst_object_get_name (parent);
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/* need own category? */
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for (i = 0; i < n_pspecs; i++) {
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GST_CAT_LOG (GST_CAT_EVENT, "deep notification from %s to %s (%s)",
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name ? name : "(null)",
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parent_name ? parent_name : "(null)", pspecs[i]->name);
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/* FIXME, not MT safe because of glib */
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g_signal_emit (parent, gst_object_signals[DEEP_NOTIFY],
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g_quark_from_string (pspecs[i]->name), GST_OBJECT_CAST (object),
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pspecs[i]);
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}
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g_free (parent_name);
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old_parent = parent;
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parent = gst_object_get_parent (old_parent);
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gst_object_unref (old_parent);
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}
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g_static_rec_mutex_unlock (&dispatch_mutex);
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}
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/**
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* gst_object_default_deep_notify:
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* @object: the #GObject that signalled the notify.
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* @orig: a #GstObject that initiated the notify.
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* @pspec: a #GParamSpec of the property.
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* @excluded_props: a set of user-specified properties to exclude or
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* NULL to show all changes.
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*
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* Adds a default deep_notify signal callback to an
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* element. The user data should contain a pointer to an array of
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* strings that should be excluded from the notify.
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* The default handler will print the new value of the property
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* using g_print.
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*/
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void
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gst_object_default_deep_notify (GObject * object, GstObject * orig,
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GParamSpec * pspec, gchar ** excluded_props)
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{
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GValue value = { 0, }; /* the important thing is that value.type = 0 */
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gchar *str = NULL;
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gchar *name = NULL;
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if (pspec->flags & G_PARAM_READABLE) {
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/* let's not print these out for excluded properties... */
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while (excluded_props != NULL && *excluded_props != NULL) {
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if (strcmp (pspec->name, *excluded_props) == 0)
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return;
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excluded_props++;
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}
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g_value_init (&value, G_PARAM_SPEC_VALUE_TYPE (pspec));
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g_object_get_property (G_OBJECT (orig), pspec->name, &value);
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|
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if (G_IS_PARAM_SPEC_ENUM (pspec)) {
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GEnumValue *enum_value;
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enum_value =
|
|
g_enum_get_value (G_ENUM_CLASS (g_type_class_ref (pspec->value_type)),
|
|
g_value_get_enum (&value));
|
|
|
|
str = g_strdup_printf ("%s (%d)", enum_value->value_nick,
|
|
enum_value->value);
|
|
} else {
|
|
str = g_strdup_value_contents (&value);
|
|
}
|
|
name = gst_object_get_path_string (orig);
|
|
g_print ("%s: %s = %s\n", name, pspec->name, str);
|
|
g_free (name);
|
|
g_free (str);
|
|
g_value_unset (&value);
|
|
} else {
|
|
name = gst_object_get_path_string (orig);
|
|
g_warning ("Parameter %s not readable in %s.", pspec->name, name);
|
|
g_free (name);
|
|
}
|
|
}
|
|
|
|
static void
|
|
gst_object_set_name_default (GstObject * object)
|
|
{
|
|
gint count;
|
|
gchar *name, *tmp;
|
|
const gchar *type_name;
|
|
|
|
type_name = G_OBJECT_TYPE_NAME (object);
|
|
|
|
/* to ensure guaranteed uniqueness across threads, only one thread
|
|
* may ever assign a name */
|
|
G_LOCK (object_name_mutex);
|
|
|
|
if (!object_name_counts) {
|
|
object_name_counts = g_hash_table_new_full (g_str_hash, g_str_equal,
|
|
g_free, NULL);
|
|
}
|
|
|
|
count = GPOINTER_TO_INT (g_hash_table_lookup (object_name_counts, type_name));
|
|
g_hash_table_insert (object_name_counts, g_strdup (type_name),
|
|
GINT_TO_POINTER (count + 1));
|
|
|
|
G_UNLOCK (object_name_mutex);
|
|
|
|
/* GstFooSink -> foosinkN */
|
|
if (strncmp (type_name, "Gst", 3) == 0)
|
|
type_name += 3;
|
|
tmp = g_strdup_printf ("%s%d", type_name, count);
|
|
name = g_ascii_strdown (tmp, strlen (tmp));
|
|
g_free (tmp);
|
|
|
|
gst_object_set_name (object, name);
|
|
g_free (name);
|
|
}
|
|
|
|
/**
|
|
* gst_object_set_name:
|
|
* @object: GstObject to set the name of
|
|
* @name: new name of object
|
|
*
|
|
* Sets the name of the object, or gives the element a guaranteed unique
|
|
* name (if @name is NULL). This function makes a copy of the provided
|
|
* name so the called must g_free() the name it sent as a parameter.
|
|
*
|
|
* MT safe.
|
|
*/
|
|
void
|
|
gst_object_set_name (GstObject * object, const gchar * name)
|
|
{
|
|
g_return_if_fail (GST_IS_OBJECT (object));
|
|
|
|
GST_LOCK (object);
|
|
g_free (object->name);
|
|
|
|
if (name != NULL) {
|
|
object->name = g_strdup (name);
|
|
GST_UNLOCK (object);
|
|
} else {
|
|
GST_UNLOCK (object);
|
|
gst_object_set_name_default (object);
|
|
}
|
|
}
|
|
|
|
/**
|
|
* gst_object_get_name:
|
|
* @object: GstObject to get the name of
|
|
*
|
|
* Get the name of the object. This function returns a copy
|
|
* of the name, you should call g_free() on it after usage.
|
|
*
|
|
* Returns: name of the object. g_free() after usage.
|
|
*
|
|
* MT safe.
|
|
*/
|
|
gchar *
|
|
gst_object_get_name (GstObject * object)
|
|
{
|
|
gchar *result = NULL;
|
|
|
|
g_return_val_if_fail (GST_IS_OBJECT (object), NULL);
|
|
|
|
GST_LOCK (object);
|
|
result = g_strdup (object->name);
|
|
GST_UNLOCK (object);
|
|
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* gst_object_set_parent:
|
|
* @object: GstObject to set parent of
|
|
* @parent: new parent of object
|
|
*
|
|
* Sets the parent of @object. The object's reference count will be incremented,
|
|
* and any floating reference will be removed (see gst_object_sink()).
|
|
*
|
|
* Causes the parent-set signal to be emitted.
|
|
*
|
|
* MT safe.
|
|
*/
|
|
void
|
|
gst_object_set_parent (GstObject * object, GstObject * parent)
|
|
{
|
|
g_return_if_fail (GST_IS_OBJECT (object));
|
|
g_return_if_fail (GST_IS_OBJECT (parent));
|
|
g_return_if_fail (object != parent);
|
|
|
|
GST_CAT_LOG_OBJECT (GST_CAT_REFCOUNTING, object, "set parent (ref and sink)");
|
|
|
|
/* no need to hold locks here as object is either floating and
|
|
* owned by this thread only or has a refcount bigger than 1 when
|
|
* concurrent access is performed */
|
|
gst_object_ref (object);
|
|
GST_LOCK (object);
|
|
if G_UNLIKELY
|
|
(object->parent != NULL)
|
|
goto had_parent;
|
|
|
|
/* sink object, we don't call our own function because we don't
|
|
* need to release/acquire the lock needlessly */
|
|
if (GST_OBJECT_IS_FLOATING (object)) {
|
|
GST_FLAG_UNSET (object, GST_OBJECT_FLOATING);
|
|
gst_object_unref (object);
|
|
}
|
|
object->parent = parent;
|
|
GST_UNLOCK (object);
|
|
|
|
g_signal_emit (G_OBJECT (object), gst_object_signals[PARENT_SET], 0, parent);
|
|
return;
|
|
|
|
had_parent:
|
|
GST_UNLOCK (object);
|
|
g_critical ("object already had a parent");
|
|
|
|
return;
|
|
}
|
|
|
|
/**
|
|
* gst_object_get_parent:
|
|
* @object: GstObject to get parent of
|
|
*
|
|
* Returns the parent of @object. This function increases the refcount
|
|
* of the parent object so you should gst_object_unref() it after usage.
|
|
*
|
|
* Returns: parent of the object, this can be NULL if the object has no
|
|
* parent. unref after usage.
|
|
*
|
|
* MT safe.
|
|
*/
|
|
GstObject *
|
|
gst_object_get_parent (GstObject * object)
|
|
{
|
|
GstObject *result = NULL;
|
|
|
|
g_return_val_if_fail (GST_IS_OBJECT (object), NULL);
|
|
|
|
GST_LOCK (object);
|
|
result = object->parent;
|
|
if (result)
|
|
gst_object_ref (result);
|
|
GST_UNLOCK (object);
|
|
|
|
return result;
|
|
}
|
|
|
|
/**
|
|
* gst_object_unparent:
|
|
* @object: GstObject to unparent
|
|
*
|
|
* Clear the parent of @object, removing the associated reference.
|
|
* This function decreases the refcount of the object so the object
|
|
* might not point to valid memory anymore after calling this function.
|
|
*
|
|
* MT safe.
|
|
*/
|
|
void
|
|
gst_object_unparent (GstObject * object)
|
|
{
|
|
GstObject *parent;
|
|
|
|
g_return_if_fail (GST_IS_OBJECT (object));
|
|
|
|
GST_LOCK (object);
|
|
parent = object->parent;
|
|
|
|
if G_LIKELY
|
|
(parent != NULL) {
|
|
GST_CAT_LOG_OBJECT (GST_CAT_REFCOUNTING, object, "unparent");
|
|
object->parent = NULL;
|
|
}
|
|
GST_UNLOCK (object);
|
|
|
|
g_signal_emit (G_OBJECT (object), gst_object_signals[PARENT_UNSET], 0,
|
|
parent);
|
|
|
|
gst_object_unref (object);
|
|
}
|
|
|
|
/**
|
|
* gst_object_check_uniqueness:
|
|
* @list: a list of #GstObject to check through
|
|
* @name: the name to search for
|
|
*
|
|
* Checks to see if there is any object named @name in @list. This function
|
|
* does not do any locking of any kind. You might want to protect the
|
|
* provided list with the lock of the owner of the list. This function
|
|
* will lock each GstObject in the list to compare the name, so be
|
|
* carefull when passing a list with a locked object.
|
|
*
|
|
* Returns: TRUE if the name does not appear in the list, FALSE if it does.
|
|
*
|
|
* MT safe.
|
|
*/
|
|
gboolean
|
|
gst_object_check_uniqueness (GList * list, const gchar * name)
|
|
{
|
|
gboolean result = TRUE;
|
|
|
|
g_return_val_if_fail (name != NULL, FALSE);
|
|
|
|
for (; list; list = g_list_next (list)) {
|
|
GstObject *child;
|
|
|
|
child = GST_OBJECT (list->data);
|
|
GST_LOCK (child);
|
|
if (strcmp (GST_OBJECT_NAME (child), name) == 0) {
|
|
GST_UNLOCK (child);
|
|
result = FALSE;
|
|
break;
|
|
}
|
|
GST_UNLOCK (child);
|
|
}
|
|
return result;
|
|
}
|
|
|
|
|
|
#ifndef GST_DISABLE_LOADSAVE_REGISTRY
|
|
/**
|
|
* gst_object_save_thyself:
|
|
* @object: GstObject to save
|
|
* @parent: The parent XML node to save the object into
|
|
*
|
|
* Saves the given object into the parent XML node.
|
|
*
|
|
* Returns: the new xmlNodePtr with the saved object
|
|
*/
|
|
xmlNodePtr
|
|
gst_object_save_thyself (GstObject * object, xmlNodePtr parent)
|
|
{
|
|
GstObjectClass *oclass;
|
|
|
|
g_return_val_if_fail (GST_IS_OBJECT (object), parent);
|
|
g_return_val_if_fail (parent != NULL, parent);
|
|
|
|
oclass = GST_OBJECT_GET_CLASS (object);
|
|
|
|
if (oclass->save_thyself)
|
|
oclass->save_thyself (object, parent);
|
|
|
|
g_signal_emit (G_OBJECT (object), gst_object_signals[OBJECT_SAVED], 0,
|
|
parent);
|
|
|
|
return parent;
|
|
}
|
|
|
|
/**
|
|
* gst_object_restore_thyself:
|
|
* @object: GstObject to load into
|
|
* @self: The XML node to load the object from
|
|
*
|
|
* Restores the given object with the data from the parent XML node.
|
|
*/
|
|
void
|
|
gst_object_restore_thyself (GstObject * object, xmlNodePtr self)
|
|
{
|
|
GstObjectClass *oclass;
|
|
|
|
g_return_if_fail (GST_IS_OBJECT (object));
|
|
g_return_if_fail (self != NULL);
|
|
|
|
oclass = GST_OBJECT_GET_CLASS (object);
|
|
|
|
if (oclass->restore_thyself)
|
|
oclass->restore_thyself (object, self);
|
|
}
|
|
|
|
static void
|
|
gst_object_real_restore_thyself (GstObject * object, xmlNodePtr self)
|
|
{
|
|
g_return_if_fail (GST_IS_OBJECT (object));
|
|
g_return_if_fail (self != NULL);
|
|
|
|
gst_class_signal_emit_by_name (object, "object_loaded", self);
|
|
}
|
|
#endif /* GST_DISABLE_LOADSAVE_REGISTRY */
|
|
|
|
static void
|
|
gst_object_set_property (GObject * object, guint prop_id,
|
|
const GValue * value, GParamSpec * pspec)
|
|
{
|
|
GstObject *gstobject;
|
|
|
|
gstobject = GST_OBJECT (object);
|
|
|
|
switch (prop_id) {
|
|
case ARG_NAME:
|
|
gst_object_set_name (gstobject, g_value_get_string (value));
|
|
break;
|
|
default:
|
|
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
|
|
break;
|
|
}
|
|
}
|
|
|
|
static void
|
|
gst_object_get_property (GObject * object, guint prop_id,
|
|
GValue * value, GParamSpec * pspec)
|
|
{
|
|
GstObject *gstobject;
|
|
|
|
gstobject = GST_OBJECT (object);
|
|
|
|
switch (prop_id) {
|
|
case ARG_NAME:
|
|
g_value_take_string (value, gst_object_get_name (gstobject));
|
|
break;
|
|
default:
|
|
G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
|
|
break;
|
|
}
|
|
}
|
|
|
|
/**
|
|
* gst_object_get_path_string:
|
|
* @object: GstObject to get the path from
|
|
*
|
|
* Generates a string describing the path of the object in
|
|
* the object hierarchy. Only useful (or used) for debugging.
|
|
*
|
|
* Returns: a string describing the path of the object. You must
|
|
* g_free() the string after usage.
|
|
*
|
|
* MT safe.
|
|
*/
|
|
gchar *
|
|
gst_object_get_path_string (GstObject * object)
|
|
{
|
|
GSList *parentage;
|
|
GSList *parents;
|
|
void *parent;
|
|
gchar *prevpath, *path;
|
|
gchar *component;
|
|
gchar *separator;
|
|
|
|
/* ref object before adding to list */
|
|
gst_object_ref (object);
|
|
parentage = g_slist_prepend (NULL, object);
|
|
|
|
path = g_strdup ("");
|
|
|
|
/* first walk the object hierarchy to build a list of the parents,
|
|
* be carefull here with refcounting. */
|
|
do {
|
|
if (GST_IS_OBJECT (object)) {
|
|
parent = gst_object_get_parent (object);
|
|
/* add parents to list, refcount remains increased while
|
|
* we handle the object */
|
|
parentage = g_slist_prepend (parentage, parent);
|
|
} else {
|
|
break;
|
|
}
|
|
object = parent;
|
|
} while (object != NULL);
|
|
|
|
/* then walk the parent list and print them out. we need to
|
|
* decrease the refcounting on each element after we handled
|
|
* it. */
|
|
for (parents = parentage; parents; parents = g_slist_next (parents)) {
|
|
if (GST_IS_OBJECT (parents->data)) {
|
|
GstObject *item = GST_OBJECT_CAST (parents->data);
|
|
GstObjectClass *oclass = GST_OBJECT_GET_CLASS (item);
|
|
|
|
component = gst_object_get_name (item);
|
|
separator = oclass->path_string_separator;
|
|
/* and unref now */
|
|
gst_object_unref (item);
|
|
} else {
|
|
component = g_strdup_printf ("%p", parents->data);
|
|
separator = "/";
|
|
}
|
|
|
|
prevpath = path;
|
|
path = g_strjoin (separator, prevpath, component, NULL);
|
|
g_free (prevpath);
|
|
g_free (component);
|
|
}
|
|
|
|
g_slist_free (parentage);
|
|
|
|
return path;
|
|
}
|
|
|
|
struct _GstSignalObject
|
|
{
|
|
GObject object;
|
|
};
|
|
|
|
struct _GstSignalObjectClass
|
|
{
|
|
GObjectClass parent_class;
|
|
|
|
/* signals */
|
|
#ifndef GST_DISABLE_LOADSAVE_REGISTRY
|
|
void (*object_loaded) (GstSignalObject * object, GstObject * new,
|
|
xmlNodePtr self);
|
|
#endif /* GST_DISABLE_LOADSAVE_REGISTRY */
|
|
};
|
|
|
|
static GType
|
|
gst_signal_object_get_type (void)
|
|
{
|
|
static GType signal_object_type = 0;
|
|
|
|
if (!signal_object_type) {
|
|
static const GTypeInfo signal_object_info = {
|
|
sizeof (GstSignalObjectClass),
|
|
NULL,
|
|
NULL,
|
|
(GClassInitFunc) gst_signal_object_class_init,
|
|
NULL,
|
|
NULL,
|
|
sizeof (GstSignalObject),
|
|
0,
|
|
(GInstanceInitFunc) gst_signal_object_init,
|
|
NULL
|
|
};
|
|
|
|
signal_object_type =
|
|
g_type_register_static (G_TYPE_OBJECT, "GstSignalObject",
|
|
&signal_object_info, 0);
|
|
}
|
|
return signal_object_type;
|
|
}
|
|
|
|
static void
|
|
gst_signal_object_class_init (GstSignalObjectClass * klass)
|
|
{
|
|
GObjectClass *gobject_class;
|
|
|
|
gobject_class = (GObjectClass *) klass;
|
|
|
|
parent_class = g_type_class_ref (G_TYPE_OBJECT);
|
|
|
|
#ifndef GST_DISABLE_LOADSAVE_REGISTRY
|
|
gst_signal_object_signals[SO_OBJECT_LOADED] =
|
|
g_signal_new ("object-loaded", G_TYPE_FROM_CLASS (klass),
|
|
G_SIGNAL_RUN_LAST, G_STRUCT_OFFSET (GstSignalObjectClass, object_loaded),
|
|
NULL, NULL, gst_marshal_VOID__OBJECT_POINTER, G_TYPE_NONE, 2,
|
|
G_TYPE_OBJECT, G_TYPE_POINTER);
|
|
#endif
|
|
}
|
|
|
|
static void
|
|
gst_signal_object_init (GstSignalObject * object)
|
|
{
|
|
}
|
|
|
|
/**
|
|
* gst_class_signal_connect
|
|
* @klass: the GstObjectClass to attach the signal to
|
|
* @name: the name of the signal to attach to
|
|
* @func: the signal function
|
|
* @func_data: a pointer to user data
|
|
*
|
|
* Connect to a class signal.
|
|
*
|
|
* Returns: the signal id.
|
|
*/
|
|
guint
|
|
gst_class_signal_connect (GstObjectClass * klass,
|
|
const gchar * name, gpointer func, gpointer func_data)
|
|
{
|
|
return g_signal_connect (klass->signal_object, name, func, func_data);
|
|
}
|
|
|
|
#ifndef GST_DISABLE_LOADSAVE_REGISTRY
|
|
/**
|
|
* gst_class_signal_emit_by_name:
|
|
* @object: the object that sends the signal
|
|
* @name: the name of the signal to emit
|
|
* @self: data for the signal
|
|
*
|
|
* emits the named class signal.
|
|
*/
|
|
void
|
|
gst_class_signal_emit_by_name (GstObject * object,
|
|
const gchar * name, xmlNodePtr self)
|
|
{
|
|
GstObjectClass *oclass;
|
|
|
|
oclass = GST_OBJECT_GET_CLASS (object);
|
|
|
|
g_signal_emit_by_name (oclass->signal_object, name, object, self);
|
|
}
|
|
|
|
#endif /* GST_DISABLE_LOADSAVE_REGISTRY */
|