mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-12-16 21:36:35 +00:00
128 lines
3.8 KiB
C
128 lines
3.8 KiB
C
/* GStreamer
|
|
* Copyright (C) <2014> William Manley <will@williammanley.net>
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
/**
|
|
* SECTION:gstnetcontrolmessagemeta
|
|
* @short_description: Network Control Message Meta
|
|
*
|
|
* #GstNetControlMessageMeta can be used to store control messages (ancillary
|
|
* data) which was received with or is to be sent alongside the buffer data.
|
|
* When used with socket sinks and sources which understand this meta it allows
|
|
* sending and receiving ancillary data such as unix credentials (See
|
|
* #GUnixCredentialsMessage) and Unix file descriptions (See #GUnixFDMessage).
|
|
*/
|
|
|
|
#include <string.h>
|
|
|
|
#include "gstnetcontrolmessagemeta.h"
|
|
|
|
static gboolean
|
|
net_control_message_meta_init (GstMeta * meta, gpointer params,
|
|
GstBuffer * buffer)
|
|
{
|
|
GstNetControlMessageMeta *nmeta = (GstNetControlMessageMeta *) meta;
|
|
|
|
nmeta->message = NULL;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static gboolean
|
|
net_control_message_meta_transform (GstBuffer * transbuf, GstMeta * meta,
|
|
GstBuffer * buffer, GQuark type, gpointer data)
|
|
{
|
|
GstNetControlMessageMeta *smeta, *dmeta;
|
|
smeta = (GstNetControlMessageMeta *) meta;
|
|
|
|
/* we always copy no matter what transform */
|
|
dmeta = gst_buffer_add_net_control_message_meta (transbuf, smeta->message);
|
|
if (!dmeta)
|
|
return FALSE;
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
static void
|
|
net_control_message_meta_free (GstMeta * meta, GstBuffer * buffer)
|
|
{
|
|
GstNetControlMessageMeta *nmeta = (GstNetControlMessageMeta *) meta;
|
|
|
|
if (nmeta->message)
|
|
g_object_unref (nmeta->message);
|
|
nmeta->message = NULL;
|
|
}
|
|
|
|
GType
|
|
gst_net_control_message_meta_api_get_type (void)
|
|
{
|
|
static volatile GType type;
|
|
static const gchar *tags[] = { "origin", NULL };
|
|
|
|
if (g_once_init_enter (&type)) {
|
|
GType _type =
|
|
gst_meta_api_type_register ("GstNetControlMessageMetaAPI", tags);
|
|
g_once_init_leave (&type, _type);
|
|
}
|
|
return type;
|
|
}
|
|
|
|
const GstMetaInfo *
|
|
gst_net_control_message_meta_get_info (void)
|
|
{
|
|
static const GstMetaInfo *meta_info = NULL;
|
|
|
|
if (g_once_init_enter (&meta_info)) {
|
|
const GstMetaInfo *mi =
|
|
gst_meta_register (GST_NET_CONTROL_MESSAGE_META_API_TYPE,
|
|
"GstNetControlMessageMeta",
|
|
sizeof (GstNetControlMessageMeta),
|
|
net_control_message_meta_init,
|
|
net_control_message_meta_free,
|
|
net_control_message_meta_transform);
|
|
g_once_init_leave (&meta_info, mi);
|
|
}
|
|
return meta_info;
|
|
}
|
|
|
|
/**
|
|
* gst_buffer_add_net_control_message_meta:
|
|
* @buffer: a #GstBuffer
|
|
* @message: a @GSocketControlMessage to attach to @buffer
|
|
*
|
|
* Attaches @message as metadata in a #GstNetControlMessageMeta to @buffer.
|
|
*
|
|
* Returns: (transfer none): a #GstNetControlMessageMeta connected to @buffer
|
|
*/
|
|
GstNetControlMessageMeta *
|
|
gst_buffer_add_net_control_message_meta (GstBuffer * buffer,
|
|
GSocketControlMessage * message)
|
|
{
|
|
GstNetControlMessageMeta *meta;
|
|
|
|
g_return_val_if_fail (GST_IS_BUFFER (buffer), NULL);
|
|
g_return_val_if_fail (G_IS_SOCKET_CONTROL_MESSAGE (message), NULL);
|
|
|
|
meta =
|
|
(GstNetControlMessageMeta *) gst_buffer_add_meta (buffer,
|
|
GST_NET_CONTROL_MESSAGE_META_INFO, NULL);
|
|
|
|
meta->message = g_object_ref (message);
|
|
|
|
return meta;
|
|
}
|