mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-11-14 13:21:28 +00:00
111 lines
2.5 KiB
C
111 lines
2.5 KiB
C
/* GStreamer
|
|
* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
|
|
* 2000 Wim Taymans <wtay@chello.be>
|
|
*
|
|
* gstmeta.c: Metadata subsystem for describing buffer properties
|
|
*
|
|
* 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., 59 Temple Place - Suite 330,
|
|
* Boston, MA 02111-1307, USA.
|
|
*/
|
|
|
|
#include "gst_private.h"
|
|
|
|
#include "gstmeta.h"
|
|
#include "gsttrace.h"
|
|
|
|
|
|
/**
|
|
* gst_meta_new_size:
|
|
* @size: the size of the new meta data
|
|
*
|
|
* Create a new metadata object with a given size.
|
|
*
|
|
* Returns: new meta object
|
|
*/
|
|
GstMeta*
|
|
gst_meta_new_size (gint size)
|
|
{
|
|
GstMeta *meta;
|
|
|
|
meta = g_malloc0 (size);
|
|
gst_meta_ref (meta);
|
|
|
|
return meta;
|
|
}
|
|
|
|
/**
|
|
* gst_meta_ref:
|
|
* @meta: the meta object to ref
|
|
*
|
|
* Increases the refcount of a meta object.
|
|
*/
|
|
void
|
|
gst_meta_ref (GstMeta *meta)
|
|
{
|
|
g_return_if_fail (meta != NULL);
|
|
|
|
gst_trace_add_entry (NULL, 0, meta, "ref meta");
|
|
|
|
#ifdef HAVE_ATOMIC_H
|
|
atomic_inc (&(meta->refcount));
|
|
#else
|
|
meta->refcount++;
|
|
#endif
|
|
}
|
|
|
|
/**
|
|
* gst_meta_unref:
|
|
* @meta: the meta object to unref
|
|
*
|
|
* Decreases the refcount of a meta object. If the refcount is zero, the
|
|
* meta object is freed.
|
|
*/
|
|
void
|
|
gst_meta_unref (GstMeta *meta)
|
|
{
|
|
gint zero;
|
|
g_return_if_fail (meta != NULL);
|
|
|
|
gst_trace_add_entry (NULL, 0, meta, "unref meta");
|
|
#ifdef HAVE_ATOMIC_H
|
|
zero = atomic_dec_and_test (&(meta->refcount));
|
|
#else
|
|
meta->refcount--;
|
|
zero = (meta->refcount == 0);
|
|
#endif
|
|
if (zero) {
|
|
// gst_trace_add_entry(NULL,0,meta,"destroy meta");
|
|
g_free (meta);
|
|
// g_print("freeing metadata\n");
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* gst_meta_cow:
|
|
* @meta: the meta object prepare for write
|
|
*
|
|
* Prepares a meta object for writing. A copy of the meta
|
|
* object is returned if needed.
|
|
*
|
|
* Returns: the meta object or a copy.
|
|
*/
|
|
GstMeta*
|
|
gst_meta_cow (GstMeta *meta)
|
|
{
|
|
g_return_val_if_fail (meta != NULL, NULL);
|
|
|
|
return NULL;
|
|
}
|