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3d887c7f07
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>
97 lines
2.5 KiB
C
97 lines
2.5 KiB
C
/* GStreamer valve element
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*
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* Copyright 2007 Collabora Ltd,
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* Copyright 2007 Nokia Corporation
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* @author: Olivier Crete <olivier.crete@collabora.co.uk>
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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., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*
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*/
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#ifndef __GST_VALVE_H__
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#define __GST_VALVE_H__
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#include <gst/gst.h>
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G_BEGIN_DECLS
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/* #define's don't like whitespacey bits */
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#define GST_TYPE_VALVE \
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(gst_valve_get_type())
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#define GST_VALVE(obj) \
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(G_TYPE_CHECK_INSTANCE_CAST((obj), \
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GST_TYPE_VALVE,GstValve))
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#define GST_VALVE_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_CAST((klass), \
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GST_TYPE_VALVE,GstValveClass))
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#define GST_IS_VALVE(obj) \
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(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_VALVE))
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#define GST_IS_VALVE_CLASS(obj) \
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(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_VALVE))
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typedef struct _GstValve GstValve;
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typedef struct _GstValveClass GstValveClass;
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/**
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* GstValveDropMode:
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* @GST_VALVE_DROP_MODE_DROP_ALL: Drop all buffers, buffer lists and events.
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* @GST_VALVE_DROP_MODE_FORWARD_STICKY_EVENTS: Drop all buffers, buffer lists
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* and non-sticky events but forward sticky events.
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* @GST_VALVE_DROP_MODE_TRANSFORM_TO_GAP: Drop all buffers, buffer lists and
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* non-sticky events but forward sticky events and forward GAP events for each
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* dropped buffer.
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*
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* Since: 1.20
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*/
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typedef enum {
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GST_VALVE_DROP_MODE_DROP_ALL,
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GST_VALVE_DROP_MODE_FORWARD_STICKY_EVENTS,
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GST_VALVE_DROP_MODE_TRANSFORM_TO_GAP,
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} GstValveDropMode;
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/**
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* GstValve:
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*
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* The private valve structure
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*/
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struct _GstValve
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{
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/*< private >*/
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GstElement parent;
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/* atomic boolean */
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gint drop;
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GstValveDropMode drop_mode;
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/* Protected by the stream lock */
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gboolean discont;
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gboolean need_repush_sticky;
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GstPad *srcpad;
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GstPad *sinkpad;
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};
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struct _GstValveClass
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{
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GstElementClass parent_class;
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};
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G_GNUC_INTERNAL GType gst_valve_get_type (void);
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G_END_DECLS
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#endif /* __GST_VALVE_H__ */
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