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/* 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
* @title: 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).
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#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 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 ((GstMetaInfo **) & 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 ((GstMetaInfo **) & meta_info, (GstMetaInfo *) 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;
}
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