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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>
132 lines
3.9 KiB
C
132 lines
3.9 KiB
C
/* GStreamer
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* Copyright (C) <2014> William Manley <will@williammanley.net>
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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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* SECTION:gstnetcontrolmessagemeta
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* @title: GstNetControlMessageMeta
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* @short_description: Network Control Message Meta
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*
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* #GstNetControlMessageMeta can be used to store control messages (ancillary
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* data) which was received with or is to be sent alongside the buffer data.
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* When used with socket sinks and sources which understand this meta it allows
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* sending and receiving ancillary data such as unix credentials (See
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* #GUnixCredentialsMessage) and Unix file descriptions (See #GUnixFDMessage).
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include <string.h>
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#include "gstnetcontrolmessagemeta.h"
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static gboolean
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net_control_message_meta_init (GstMeta * meta, gpointer params,
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GstBuffer * buffer)
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{
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GstNetControlMessageMeta *nmeta = (GstNetControlMessageMeta *) meta;
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nmeta->message = NULL;
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return TRUE;
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}
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static gboolean
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net_control_message_meta_transform (GstBuffer * transbuf, GstMeta * meta,
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GstBuffer * buffer, GQuark type, gpointer data)
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{
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GstNetControlMessageMeta *smeta, *dmeta;
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smeta = (GstNetControlMessageMeta *) meta;
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/* we always copy no matter what transform */
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dmeta = gst_buffer_add_net_control_message_meta (transbuf, smeta->message);
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if (!dmeta)
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return FALSE;
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return TRUE;
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}
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static void
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net_control_message_meta_free (GstMeta * meta, GstBuffer * buffer)
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{
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GstNetControlMessageMeta *nmeta = (GstNetControlMessageMeta *) meta;
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if (nmeta->message)
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g_object_unref (nmeta->message);
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nmeta->message = NULL;
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}
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GType
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gst_net_control_message_meta_api_get_type (void)
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{
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static GType type;
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static const gchar *tags[] = { "origin", NULL };
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if (g_once_init_enter (&type)) {
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GType _type =
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gst_meta_api_type_register ("GstNetControlMessageMetaAPI", tags);
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g_once_init_leave (&type, _type);
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}
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return type;
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}
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const GstMetaInfo *
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gst_net_control_message_meta_get_info (void)
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{
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static const GstMetaInfo *meta_info = NULL;
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if (g_once_init_enter ((GstMetaInfo **) & meta_info)) {
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const GstMetaInfo *mi =
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gst_meta_register (GST_NET_CONTROL_MESSAGE_META_API_TYPE,
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"GstNetControlMessageMeta",
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sizeof (GstNetControlMessageMeta),
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net_control_message_meta_init,
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net_control_message_meta_free,
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net_control_message_meta_transform);
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g_once_init_leave ((GstMetaInfo **) & meta_info, (GstMetaInfo *) mi);
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}
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return meta_info;
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}
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/**
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* gst_buffer_add_net_control_message_meta:
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* @buffer: a #GstBuffer
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* @message: a @GSocketControlMessage to attach to @buffer
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*
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* Attaches @message as metadata in a #GstNetControlMessageMeta to @buffer.
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*
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* Returns: (transfer none): a #GstNetControlMessageMeta connected to @buffer
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*/
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GstNetControlMessageMeta *
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gst_buffer_add_net_control_message_meta (GstBuffer * buffer,
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GSocketControlMessage * message)
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{
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GstNetControlMessageMeta *meta;
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g_return_val_if_fail (GST_IS_BUFFER (buffer), NULL);
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g_return_val_if_fail (G_IS_SOCKET_CONTROL_MESSAGE (message), NULL);
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meta =
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(GstNetControlMessageMeta *) gst_buffer_add_meta (buffer,
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GST_NET_CONTROL_MESSAGE_META_INFO, NULL);
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meta->message = g_object_ref (message);
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return meta;
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}
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