mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-12-15 04:46:32 +00:00
53b193414d
element-added-deep -> deep-element-added in the GstBin doc header Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/547>
261 lines
8 KiB
C
261 lines
8 KiB
C
/* GStreamer
|
|
* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
|
|
* 2000 Wim Taymans <wtay@chello.be>
|
|
*
|
|
* gstbin.h: Header for GstBin container object
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Library General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2 of the License, or (at your option) any later version.
|
|
*
|
|
* This library is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Library General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Library General Public
|
|
* License along with this library; if not, write to the
|
|
* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
|
|
* Boston, MA 02110-1301, USA.
|
|
*/
|
|
|
|
|
|
#ifndef __GST_BIN_H__
|
|
#define __GST_BIN_H__
|
|
|
|
#include <gst/gstelement.h>
|
|
#include <gst/gstiterator.h>
|
|
#include <gst/gstbus.h>
|
|
|
|
G_BEGIN_DECLS
|
|
|
|
#define GST_TYPE_BIN (gst_bin_get_type ())
|
|
#define GST_IS_BIN(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_BIN))
|
|
#define GST_IS_BIN_CLASS(klass) (G_TYPE_CHECK_CLASS_TYPE ((klass), GST_TYPE_BIN))
|
|
#define GST_BIN_GET_CLASS(obj) (G_TYPE_INSTANCE_GET_CLASS ((obj), GST_TYPE_BIN, GstBinClass))
|
|
#define GST_BIN(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_BIN, GstBin))
|
|
#define GST_BIN_CLASS(klass) (G_TYPE_CHECK_CLASS_CAST ((klass), GST_TYPE_BIN, GstBinClass))
|
|
#define GST_BIN_CAST(obj) ((GstBin*)(obj))
|
|
|
|
/**
|
|
* GstBinFlags:
|
|
* @GST_BIN_FLAG_NO_RESYNC: don't resync a state change when elements are
|
|
* added or linked in the bin (Since: 1.0.5)
|
|
* @GST_BIN_FLAG_STREAMS_AWARE: Indicates whether the bin can handle elements
|
|
* that add/remove source pads at any point in time without
|
|
* first posting a no-more-pads signal (Since: 1.10)
|
|
* @GST_BIN_FLAG_LAST: the last enum in the series of flags for bins.
|
|
* Derived classes can use this as first value in a list of flags.
|
|
*
|
|
* GstBinFlags are a set of flags specific to bins. Most are set/used
|
|
* internally. They can be checked using the GST_OBJECT_FLAG_IS_SET () macro,
|
|
* and (un)set using GST_OBJECT_FLAG_SET () and GST_OBJECT_FLAG_UNSET ().
|
|
*/
|
|
typedef enum {
|
|
GST_BIN_FLAG_NO_RESYNC = (GST_ELEMENT_FLAG_LAST << 0),
|
|
GST_BIN_FLAG_STREAMS_AWARE = (GST_ELEMENT_FLAG_LAST << 1),
|
|
/* padding */
|
|
GST_BIN_FLAG_LAST = (GST_ELEMENT_FLAG_LAST << 5)
|
|
} GstBinFlags;
|
|
|
|
/**
|
|
* GST_BIN_IS_NO_RESYNC:
|
|
* @bin: A #GstBin
|
|
*
|
|
* Check if @bin will resync its state change when elements are added and
|
|
* removed.
|
|
*
|
|
* Since: 1.0.5
|
|
*/
|
|
#define GST_BIN_IS_NO_RESYNC(bin) (GST_OBJECT_FLAG_IS_SET(bin,GST_BIN_FLAG_NO_RESYNC))
|
|
|
|
typedef struct _GstBin GstBin;
|
|
typedef struct _GstBinClass GstBinClass;
|
|
typedef struct _GstBinPrivate GstBinPrivate;
|
|
|
|
/**
|
|
* GST_BIN_NUMCHILDREN:
|
|
* @bin: a #GstBin
|
|
*
|
|
* Gets the number of children in a bin.
|
|
*/
|
|
#define GST_BIN_NUMCHILDREN(bin) (GST_BIN_CAST(bin)->numchildren)
|
|
/**
|
|
* GST_BIN_CHILDREN:
|
|
* @bin: a #GstBin
|
|
*
|
|
* Gets the list with children in a bin.
|
|
*/
|
|
#define GST_BIN_CHILDREN(bin) (GST_BIN_CAST(bin)->children)
|
|
/**
|
|
* GST_BIN_CHILDREN_COOKIE:
|
|
* @bin: a #GstBin
|
|
*
|
|
* Gets the children cookie that watches the children list.
|
|
*/
|
|
#define GST_BIN_CHILDREN_COOKIE(bin) (GST_BIN_CAST(bin)->children_cookie)
|
|
|
|
/**
|
|
* GstBin:
|
|
* @numchildren: the number of children in this bin
|
|
* @children: (element-type Gst.Element): the list of children in this bin
|
|
* @children_cookie: updated whenever @children changes
|
|
* @child_bus: internal bus for handling child messages
|
|
* @messages: (element-type Gst.Message): queued and cached messages
|
|
* @polling: the bin is currently calculating its state
|
|
* @state_dirty: the bin needs to recalculate its state (deprecated)
|
|
* @clock_dirty: the bin needs to select a new clock
|
|
* @provided_clock: the last clock selected
|
|
* @clock_provider: the element that provided @provided_clock
|
|
*
|
|
* The GstBin base class. Subclasses can access these fields provided
|
|
* the LOCK is taken.
|
|
*/
|
|
struct _GstBin {
|
|
GstElement element;
|
|
|
|
/*< public >*/ /* with LOCK */
|
|
/* our children, subclass are supposed to update these
|
|
* fields to reflect their state with _iterate_*() */
|
|
gint numchildren;
|
|
GList *children;
|
|
guint32 children_cookie;
|
|
|
|
GstBus *child_bus;
|
|
GList *messages;
|
|
|
|
gboolean polling;
|
|
gboolean state_dirty;
|
|
|
|
gboolean clock_dirty;
|
|
GstClock *provided_clock;
|
|
GstElement *clock_provider;
|
|
|
|
/*< private >*/
|
|
GstBinPrivate *priv;
|
|
|
|
gpointer _gst_reserved[GST_PADDING];
|
|
};
|
|
|
|
/**
|
|
* GstBinClass:
|
|
* @parent_class: bin parent class
|
|
* @add_element: method to add an element to a bin
|
|
* @remove_element: method to remove an element from a bin
|
|
* @handle_message: method to handle a message from the children
|
|
* @deep_element_added: method called when an element was added somewhere
|
|
* in the bin hierarchy
|
|
* @deep_element_removed: method called when an element was removed somewhere
|
|
* in the bin hierarchy
|
|
*
|
|
* Subclasses can override the @add_element and @remove_element to
|
|
* update the list of children in the bin.
|
|
*
|
|
* The @handle_message method can be overridden to implement custom
|
|
* message handling. @handle_message takes ownership of the message, just like
|
|
* #gst_element_post_message.
|
|
*
|
|
* The @deep_element_added vfunc will be called when a new element has been
|
|
* added to any bin inside this bin, so it will also be called if a new child
|
|
* was added to a sub-bin of this bin. #GstBin implementations that override
|
|
* this message should chain up to the parent class implementation so the
|
|
* #GstBin::deep-element-added signal is emitted on all parents.
|
|
*/
|
|
struct _GstBinClass {
|
|
GstElementClass parent_class;
|
|
|
|
/*< private >*/
|
|
GThreadPool *pool; /* deprecated */
|
|
|
|
/* signals */
|
|
void (*element_added) (GstBin *bin, GstElement *child);
|
|
void (*element_removed) (GstBin *bin, GstElement *child);
|
|
|
|
/*< public >*/
|
|
/* virtual methods for subclasses */
|
|
gboolean (*add_element) (GstBin *bin, GstElement *element);
|
|
gboolean (*remove_element) (GstBin *bin, GstElement *element);
|
|
|
|
void (*handle_message) (GstBin *bin, GstMessage *message);
|
|
|
|
/*< private >*/
|
|
/* signal */
|
|
gboolean (*do_latency) (GstBin *bin);
|
|
|
|
/*< public >*/
|
|
/* signal */
|
|
void (*deep_element_added) (GstBin *bin, GstBin *sub_bin, GstElement *child);
|
|
void (*deep_element_removed) (GstBin *bin, GstBin *sub_bin, GstElement *child);
|
|
|
|
/*< private >*/
|
|
gpointer _gst_reserved[GST_PADDING-2];
|
|
};
|
|
|
|
GST_API
|
|
GType gst_bin_get_type (void);
|
|
|
|
GST_API
|
|
GstElement* gst_bin_new (const gchar *name);
|
|
|
|
/* add and remove elements from the bin */
|
|
|
|
GST_API
|
|
gboolean gst_bin_add (GstBin *bin, GstElement *element);
|
|
|
|
GST_API
|
|
gboolean gst_bin_remove (GstBin *bin, GstElement *element);
|
|
|
|
/* retrieve a single child */
|
|
|
|
GST_API
|
|
GstElement* gst_bin_get_by_name (GstBin *bin, const gchar *name);
|
|
|
|
GST_API
|
|
GstElement* gst_bin_get_by_name_recurse_up (GstBin *bin, const gchar *name);
|
|
|
|
GST_API
|
|
GstElement* gst_bin_get_by_interface (GstBin *bin, GType iface);
|
|
|
|
/* retrieve multiple children */
|
|
|
|
GST_API
|
|
GstIterator* gst_bin_iterate_elements (GstBin *bin);
|
|
|
|
GST_API
|
|
GstIterator* gst_bin_iterate_sorted (GstBin *bin);
|
|
|
|
GST_API
|
|
GstIterator* gst_bin_iterate_recurse (GstBin *bin);
|
|
|
|
GST_API
|
|
GstIterator* gst_bin_iterate_sinks (GstBin *bin);
|
|
|
|
GST_API
|
|
GstIterator* gst_bin_iterate_sources (GstBin *bin);
|
|
|
|
GST_API
|
|
GstIterator* gst_bin_iterate_all_by_interface (GstBin *bin, GType iface);
|
|
|
|
GST_API
|
|
GstIterator* gst_bin_iterate_all_by_element_factory_name (GstBin * bin, const gchar * factory_name);
|
|
|
|
/* latency */
|
|
|
|
GST_API
|
|
gboolean gst_bin_recalculate_latency (GstBin * bin);
|
|
|
|
/* set and get suppressed flags */
|
|
|
|
GST_API
|
|
void gst_bin_set_suppressed_flags (GstBin * bin, GstElementFlags flags);
|
|
|
|
GST_API
|
|
GstElementFlags gst_bin_get_suppressed_flags (GstBin * bin);
|
|
|
|
G_DEFINE_AUTOPTR_CLEANUP_FUNC(GstBin, gst_object_unref)
|
|
|
|
G_END_DECLS
|
|
|
|
|
|
#endif /* __GST_BIN_H__ */
|