gstreamer/libs/gst/net/gstnetcontrolmessagemeta.c
Tim-Philipp Müller 57c8e0146f libs: figure out right export define in configure
Add new GST_API_EXPORT in config.h and use that for GST_*_API
decorators instead of GST_EXPORT.

The right export define depends on the toolchain and whether
we're using -fvisibility=hidden or not, so it's better to set it
to the right thing directly than hard-coding a compiler whitelist
in the public header.

We put the export define into config.h instead of passing it via the
command line to the compiler because it might contain spaces and brackets
and in the autotools scenario we'd have to pass that through multiple
layers of plumbing and Makefile/shell escaping and we're just not going
to be *that* lucky.

The export define is only used if we're compiling our lib, not by external
users of the lib headers, so it's not a problem to put it into config.h

Also, this means all .c files of libs need to include config.h
to get the export marker defined, so fix up a few that didn't
include config.h.

This commit depends on a common submodule commit that makes gst-glib-gen.mak
add an #include "config.h" to generated enum/marshal .c files for the
autotools build.

https://bugzilla.gnome.org/show_bug.cgi?id=797185
2018-09-24 08:39:37 +01:00

132 lines
3.9 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
* @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 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 ((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;
}