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120 lines
3.3 KiB
C
120 lines
3.3 KiB
C
/* GStreamer
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* Copyright (C) 2008 Jan Schmidt <thaytan@noraisin.net>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifdef HAVE_CONFIG_H
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# include <config.h>
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#endif
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#include <string.h>
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#include <gst/gst.h>
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#include "rsnwrappedbuffer.h"
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GstBuffer *
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rsn_wrapped_buffer_new (GstBuffer * buf_to_wrap, GstElement * owner)
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{
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GstBuffer *buf;
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RsnMetaWrapped *meta;
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g_return_val_if_fail (buf_to_wrap, NULL);
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buf = gst_buffer_new ();
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meta = RSN_META_WRAPPED_ADD (buf);
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meta->wrapped_buffer = buf_to_wrap;
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meta->owner = gst_object_ref (owner);
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GST_BUFFER_DATA (buf) = GST_BUFFER_DATA (buf_to_wrap);
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GST_BUFFER_SIZE (buf) = GST_BUFFER_SIZE (buf_to_wrap);
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gst_buffer_copy_metadata (GST_BUFFER (buf), buf_to_wrap, GST_BUFFER_COPY_ALL);
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/* If the wrapped buffer isn't writable, make sure this one isn't either */
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if (!gst_buffer_is_writable (buf_to_wrap))
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GST_BUFFER_FLAG_SET (buf, GST_BUFFER_FLAG_READONLY);
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return buf;
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}
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void
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rsn_meta_wrapped_set_owner (RsnMetaWrapped * meta, GstElement * owner)
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{
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g_return_if_fail (meta != NULL);
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if (meta->owner)
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gst_object_unref (meta->owner);
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if (owner)
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gst_object_ref (owner);
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meta->owner = owner;
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}
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GstBuffer *
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rsn_meta_wrapped_unwrap_and_unref (GstBuffer * wrap_buf, RsnMetaWrapped * meta)
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{
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GstBuffer *buf;
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gboolean is_readonly;
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g_return_val_if_fail (wrap_buf != NULL, NULL);
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g_return_val_if_fail (meta->wrapped_buffer != NULL, NULL);
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buf = gst_buffer_ref (meta->wrapped_buffer);
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/* Copy changed metadata back to the wrapped buffer from the wrapper,
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* except the the read-only flag and the caps. */
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is_readonly = GST_BUFFER_FLAG_IS_SET (wrap_buf, GST_BUFFER_FLAG_READONLY);
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gst_buffer_copy_metadata (buf, GST_BUFFER (wrap_buf),
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GST_BUFFER_COPY_FLAGS | GST_BUFFER_COPY_TIMESTAMPS);
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if (!is_readonly)
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GST_BUFFER_FLAG_UNSET (buf, GST_BUFFER_FLAG_READONLY);
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gst_buffer_unref (wrap_buf);
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return buf;
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}
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static void
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rsn_meta_wrapped_init (RsnMetaWrapped * meta, GstBuffer * buffer)
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{
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meta->owner = NULL;
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}
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static void
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rsn_meta_wrapped_free (RsnMetaWrapped * meta, GstBuffer * buffer)
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{
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gst_buffer_unref (meta->wrapped_buffer);
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if (meta->owner)
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gst_object_unref (meta->owner);
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}
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const GstMetaInfo *
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rsn_meta_wrapped_get_info (void)
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{
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static const GstMetaInfo *meta_info = NULL;
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if (meta_info == NULL) {
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meta_info = gst_meta_register ("RsnMetaWrapped", "RsnMetaWrapped",
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sizeof (RsnMetaWrapped),
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(GstMetaInitFunction) rsn_meta_wrapped_init,
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(GstMetaFreeFunction) rsn_meta_wrapped_free,
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(GstMetaTransformFunction) NULL,
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(GstMetaSerializeFunction) NULL, (GstMetaDeserializeFunction) NULL);
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}
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return meta_info;
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}
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