gstreamer/plugins/elements/gstvalve.h
Matthew Waters 3d887c7f07 gst: don't use volatile to mean atomic
volatile is not sufficient to provide atomic guarantees and real atomics
should be used instead.  GCC 11 has started warning about using volatile
with atomic operations.

https://gitlab.gnome.org/GNOME/glib/-/merge_requests/1719

Discovered in https://gitlab.freedesktop.org/gstreamer/gst-plugins-good/-/issues/868

Part-of: <https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/775>
2021-03-19 04:15:19 +00:00

96 lines
2.5 KiB
C

/* GStreamer valve element
*
* Copyright 2007 Collabora Ltd,
* Copyright 2007 Nokia Corporation
* @author: Olivier Crete <olivier.crete@collabora.co.uk>
*
* 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_VALVE_H__
#define __GST_VALVE_H__
#include <gst/gst.h>
G_BEGIN_DECLS
/* #define's don't like whitespacey bits */
#define GST_TYPE_VALVE \
(gst_valve_get_type())
#define GST_VALVE(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj), \
GST_TYPE_VALVE,GstValve))
#define GST_VALVE_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass), \
GST_TYPE_VALVE,GstValveClass))
#define GST_IS_VALVE(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_VALVE))
#define GST_IS_VALVE_CLASS(obj) \
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_VALVE))
typedef struct _GstValve GstValve;
typedef struct _GstValveClass GstValveClass;
/**
* GstValveDropMode:
* @GST_VALVE_DROP_MODE_DROP_ALL: Drop all buffers, buffer lists and events.
* @GST_VALVE_DROP_MODE_FORWARD_STICKY_EVENTS: Drop all buffers, buffer lists
* and non-sticky events but forward sticky events.
* @GST_VALVE_DROP_MODE_TRANSFORM_TO_GAP: Drop all buffers, buffer lists and
* non-sticky events but forward sticky events and forward GAP events for each
* dropped buffer.
*
* Since: 1.20
*/
typedef enum {
GST_VALVE_DROP_MODE_DROP_ALL,
GST_VALVE_DROP_MODE_FORWARD_STICKY_EVENTS,
GST_VALVE_DROP_MODE_TRANSFORM_TO_GAP,
} GstValveDropMode;
/**
* GstValve:
*
* The private valve structure
*/
struct _GstValve
{
/*< private >*/
GstElement parent;
/* atomic boolean */
gint drop;
GstValveDropMode drop_mode;
/* Protected by the stream lock */
gboolean discont;
gboolean need_repush_sticky;
GstPad *srcpad;
GstPad *sinkpad;
};
struct _GstValveClass
{
GstElementClass parent_class;
};
G_GNUC_INTERNAL GType gst_valve_get_type (void);
G_END_DECLS
#endif /* __GST_VALVE_H__ */