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51cbf22624
Original commit message from CVS: This is a megapatch with the following changes: - moved the gchar *name to GstObject, removed the ones in GstElement and GstPad. - moved the parent handling completely into GstObject. This cause *all* of the plugins to fail (except those that used gst_pad_get_parent) - rearanged the XML save handling. - GstObject now has a class function save/restore_thyself. - GstObject has a generic method gst_object_save_thyself, this makes it possible to fire a signal wehever a new object is loaded. This is needed so we can add XML save hooks. - GstXML API has changed slightly. You now have to create a GstXML object first before you can actually load something. This makes it possible to attach a signal to GstXML whenever an object is loaded. I'm not sure we will keep this interface. - GstObject can now print the path_string without knowing about the GstPad and GstElement types. - Added gst_bin_get_by_name_recurse_up to lookup an element in the current element hierarchy. - added XML namespaces to the saved pipelines the namespace is: http://gstreamer.net/gst-core/1.0/ namespaces are needed to distinguish user generated XML from the core XML. Note that the plugins still contain a macro GST_OBJECT_PARENT that will be replaced with gst_pad_get_parent shortly.
151 lines
3.9 KiB
C
151 lines
3.9 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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* gstbin.h: Header for GstBin container object
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifndef __GST_BIN_H__
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#define __GST_BIN_H__
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#include <gst/gstelement.h>
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#include <gst/cothreads.h>
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#ifdef __cplusplus
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extern "C" {
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#endif /* __cplusplus */
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extern GstElementDetails gst_bin_details;
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#define GST_TYPE_BIN \
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(gst_bin_get_type())
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#define GST_BIN(obj) \
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(GTK_CHECK_CAST((obj),GST_TYPE_BIN,GstBin))
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#define GST_BIN_CLASS(klass) \
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(GTK_CHECK_CLASS_CAST((klass),GST_TYPE_BIN,GstBinClass))
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#define GST_IS_BIN(obj) \
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(GTK_CHECK_TYPE((obj),GST_TYPE_BIN))
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#define GST_IS_BIN_CLASS(obj) \
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(GTK_CHECK_CLASS_TYPE((klass),GST_TYPE_BIN))
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typedef enum {
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/* this bin is a manager of child elements, i.e. a pipeline or thread */
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GST_BIN_FLAG_MANAGER = GST_ELEMENT_FLAG_LAST,
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/* we prefer to have cothreads when its an option, over chain-based */
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GST_BIN_FLAG_PREFER_COTHREADS,
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/* padding */
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GST_BIN_FLAG_LAST = GST_ELEMENT_FLAG_LAST + 4,
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} GstBinFlags;
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typedef struct _GstBin GstBin;
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typedef struct _GstBinClass GstBinClass;
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typedef struct __GstBinChain _GstBinChain;
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struct _GstBin {
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GstElement element;
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/* our children */
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gint numchildren;
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GList *children;
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gint num_eos_providers;
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GList *eos_providers;
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GCond *eoscond;
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/* iteration state */
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gboolean need_cothreads;
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GList *managed_elements;
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gint num_managed_elements;
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GList *chains;
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gint num_chains;
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GList *entries;
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gint num_entries;
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cothread_context *threadcontext;
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gboolean use_cothreads;
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};
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struct _GstBinClass {
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GstElementClass parent_class;
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/* signals */
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void (*object_added) (GstObject *object, GstObject *child);
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void (*object_removed) (GstObject *object, GstObject *child);
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/* change the state of elements of the given type */
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gboolean (*change_state_type) (GstBin *bin,
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GstElementState state,
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GtkType type);
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/* create a plan for the execution of the bin */
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void (*create_plan) (GstBin *bin);
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void (*schedule) (GstBin *bin);
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/* run a full iteration of operation */
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gboolean (*iterate) (GstBin *bin);
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};
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struct __GstBinChain {
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GList *elements;
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gint num_elements;
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GList *entries;
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gboolean need_cothreads;
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gboolean need_scheduling;
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};
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GtkType gst_bin_get_type (void);
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GstElement* gst_bin_new (const gchar *name);
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#define gst_bin_destroy(bin) gst_object_destroy(GST_OBJECT(bin))
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/* add and remove elements from the bin */
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void gst_bin_add (GstBin *bin,
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GstElement *element);
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void gst_bin_remove (GstBin *bin,
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GstElement *element);
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/* retrieve a single element or the list of children */
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GstElement* gst_bin_get_by_name (GstBin *bin,
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const gchar *name);
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GstElement* gst_bin_get_by_name_recurse_up (GstBin *bin,
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const gchar *name);
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GList* gst_bin_get_list (GstBin *bin);
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void gst_bin_create_plan (GstBin *bin);
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void gst_bin_schedule (GstBin *bin);
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gboolean gst_bin_set_state_type (GstBin *bin,
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GstElementState state,
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GtkType type);
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gboolean gst_bin_iterate (GstBin *bin);
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/* hack FIXME */
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void gst_bin_use_cothreads (GstBin *bin,
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gboolean enabled);
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#ifdef __cplusplus
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}
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#endif /* __cplusplus */
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#endif /* __GST_BIN_H__ */
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