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/* GStreamer
* Copyright (C) 2008 Jan Schmidt <thaytan@noraisin.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., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <string.h>
#include <gst/gst.h>
#include "rsnwrappedbuffer.h"
GstBuffer *
rsn_wrapped_buffer_new (GstBuffer * buf_to_wrap, GstElement * owner)
{
GstBuffer *buf;
RsnMetaWrapped *meta;
g_return_val_if_fail (buf_to_wrap, NULL);
buf = gst_buffer_new ();
meta = RSN_META_WRAPPED_ADD (buf);
meta->wrapped_buffer = buf_to_wrap;
meta->owner = gst_object_ref (owner);
GST_BUFFER_DATA (buf) = GST_BUFFER_DATA (buf_to_wrap);
GST_BUFFER_SIZE (buf) = GST_BUFFER_SIZE (buf_to_wrap);
gst_buffer_copy_metadata (GST_BUFFER (buf), buf_to_wrap, GST_BUFFER_COPY_ALL);
/* If the wrapped buffer isn't writable, make sure this one isn't either */
if (!gst_buffer_is_writable (buf_to_wrap))
GST_BUFFER_FLAG_SET (buf, GST_BUFFER_FLAG_READONLY);
return buf;
}
void
rsn_meta_wrapped_set_owner (RsnMetaWrapped * meta, GstElement * owner)
{
g_return_if_fail (meta != NULL);
if (meta->owner)
gst_object_unref (meta->owner);
if (owner)
gst_object_ref (owner);
meta->owner = owner;
}
GstBuffer *
rsn_meta_wrapped_unwrap_and_unref (GstBuffer * wrap_buf, RsnMetaWrapped * meta)
{
GstBuffer *buf;
gboolean is_readonly;
g_return_val_if_fail (wrap_buf != NULL, NULL);
g_return_val_if_fail (meta->wrapped_buffer != NULL, NULL);
buf = gst_buffer_ref (meta->wrapped_buffer);
buf = gst_buffer_make_metadata_writable (buf);
/* Copy changed metadata back to the wrapped buffer from the wrapper,
* except the the read-only flag and the caps. */
is_readonly = GST_BUFFER_FLAG_IS_SET (wrap_buf, GST_BUFFER_FLAG_READONLY);
gst_buffer_copy_metadata (buf, GST_BUFFER (wrap_buf),
GST_BUFFER_COPY_FLAGS | GST_BUFFER_COPY_TIMESTAMPS);
if (!is_readonly)
GST_BUFFER_FLAG_UNSET (buf, GST_BUFFER_FLAG_READONLY);
gst_buffer_unref (wrap_buf);
return buf;
}
static void
rsn_meta_wrapped_init (RsnMetaWrapped * meta, GstBuffer * buffer)
{
meta->owner = NULL;
}
static void
rsn_meta_wrapped_free (RsnMetaWrapped * meta, GstBuffer * buffer)
{
gst_buffer_unref (meta->wrapped_buffer);
if (meta->owner)
gst_object_unref (meta->owner);
}
const GstMetaInfo *
rsn_meta_wrapped_get_info (void)
{
static const GstMetaInfo *meta_info = NULL;
if (meta_info == NULL) {
meta_info = gst_meta_register ("RsnMetaWrapped", "RsnMetaWrapped",
sizeof (RsnMetaWrapped),
(GstMetaInitFunction) rsn_meta_wrapped_init,
(GstMetaFreeFunction) rsn_meta_wrapped_free,
(GstMetaTransformFunction) NULL,
(GstMetaSerializeFunction) NULL, (GstMetaDeserializeFunction) NULL);
}
return meta_info;
}
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