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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"
G_DEFINE_TYPE (RsnWrappedBuffer, rsn_wrappedbuffer, GST_TYPE_BUFFER);
static gboolean
rsn_wrapped_buffer_default_release (GstElement * owner, RsnWrappedBuffer * buf);
static void rsn_wrapped_buffer_finalize (RsnWrappedBuffer * wrap_buf);
static void
rsn_wrappedbuffer_class_init (RsnWrappedBufferClass * klass)
{
GstMiniObjectClass *mini_object_class = GST_MINI_OBJECT_CLASS (klass);
mini_object_class->finalize = (GstMiniObjectFinalizeFunction)
rsn_wrapped_buffer_finalize;
}
static void
rsn_wrappedbuffer_init (RsnWrappedBuffer * self)
{
self->release = rsn_wrapped_buffer_default_release;
}
static void
rsn_wrapped_buffer_finalize (RsnWrappedBuffer * wrap_buf)
{
if (wrap_buf->release) {
/* Release might increment the refcount to recycle and return TRUE,
* in which case, exit without chaining up */
if (wrap_buf->release (wrap_buf->owner, wrap_buf))
return;
}
GST_MINI_OBJECT_CLASS (rsn_wrappedbuffer_parent_class)->finalize
(GST_MINI_OBJECT (wrap_buf));
}
RsnWrappedBuffer *
rsn_wrapped_buffer_new (GstBuffer * buf_to_wrap)
{
RsnWrappedBuffer *buf;
g_return_val_if_fail (buf_to_wrap, NULL);
buf = (RsnWrappedBuffer *) gst_mini_object_new (RSN_TYPE_WRAPPEDBUFFER);
if (buf == NULL)
return NULL;
buf->wrapped_buffer = buf_to_wrap;
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_wrapped_buffer_set_owner (RsnWrappedBuffer * wrapped_buf,
GstElement * owner)
{
g_return_if_fail (wrapped_buf != NULL);
if (wrapped_buf->owner)
gst_object_unref (wrapped_buf->owner);
if (owner)
wrapped_buf->owner = gst_object_ref (owner);
else
wrapped_buf->owner = NULL;
}
void
rsn_wrapped_buffer_set_releasefunc (RsnWrappedBuffer * wrapped_buf,
RsnWrappedBufferReleaseFunc release_func)
{
g_return_if_fail (wrapped_buf != NULL);
wrapped_buf->release = release_func;
}
static gboolean
rsn_wrapped_buffer_default_release (GstElement * owner, RsnWrappedBuffer * buf)
{
g_return_val_if_fail (buf != NULL, FALSE);
g_return_val_if_fail (buf->wrapped_buffer != NULL, FALSE);
gst_buffer_unref (buf->wrapped_buffer);
if (buf->owner)
gst_object_unref (buf->owner);
return FALSE;
}
GstBuffer *
rsn_wrappedbuffer_unwrap_and_unref (RsnWrappedBuffer * wrap_buf)
{
GstBuffer *buf;
gboolean is_readonly;
g_return_val_if_fail (wrap_buf != NULL, NULL);
g_return_val_if_fail (wrap_buf->wrapped_buffer != NULL, NULL);
buf = gst_buffer_ref (wrap_buf->wrapped_buffer);
/* 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 (GST_BUFFER (wrap_buf));
return buf;
}
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