1 files changed, 152 insertions, 0 deletions
diff --git a/ext/resindvd/rsnwrappedbuffer.c b/ext/resindvd/rsnwrappedbuffer.c
new file mode 100644
index 00000000..e394e429
--- /dev/null
+++ b/ext/resindvd/rsnwrappedbuffer.c
@@ -0,0 +1,152 @@
+/* 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"
+
+GST_BOILERPLATE (RsnWrappedBuffer, rsn_wrappedbuffer,
+    GstBuffer, 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_base_init (gpointer gclass)
+{
+}
+
+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 * buf, RsnWrappedBufferClass * gclass)
+{
+  buf->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 (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;
+}