--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/gstreamer_core/libs/gst/base/gstdataqueue.h	Thu Dec 17 08:53:32 2009 +0200
@@ -0,0 +1,203 @@
+/* GStreamer
+ * Copyright (C) 2006 Edward Hervey <edward@fluendo.com>
+ *
+ * gstdataqueue.h:
+ *
+ * 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.
+ */
+
+
+#ifndef __GST_DATA_QUEUE_H__
+#define __GST_DATA_QUEUE_H__
+
+#include <gst/gst.h>
+
+G_BEGIN_DECLS
+#define GST_TYPE_DATA_QUEUE \
+  (gst_data_queue_get_type())
+#define GST_DATA_QUEUE(obj) \
+  (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_DATA_QUEUE,GstDataQueue))
+#define GST_DATA_QUEUE_CLASS(klass) \
+  (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_DATA_QUEUE,GstDataQueueClass))
+#define GST_IS_DATA_QUEUE(obj) \
+  (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_DATA_QUEUE))
+#define GST_IS_DATA_QUEUE_CLASS(klass) \
+  (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_DATA_QUEUE))
+typedef struct _GstDataQueue GstDataQueue;
+typedef struct _GstDataQueueClass GstDataQueueClass;
+typedef struct _GstDataQueueSize GstDataQueueSize;
+typedef struct _GstDataQueueItem GstDataQueueItem;
+
+/**
+ * GstDataQueueItem:
+ * @object: the #GstMiniObject to queue.
+ * @size: the size in bytes of the miniobject.
+ * @duration: the duration in #GstClockTime of the miniobject. Can not be
+ * #GST_CLOCK_TIME_NONE.
+ * @visible: #TRUE if @object should be considered as a visible object.
+ * @destroy: The #GDestroyNotify function to use to free the #GstDataQueueItem.
+ * This function should also drop the reference to @object the owner of the
+ * #GstDataQueueItem is assumed to hold.
+ *
+ * Structure used by #GstDataQueue. You can supply a different structure, as
+ * long as the top of the structure is identical to this structure.
+ */
+
+struct _GstDataQueueItem
+{
+  GstMiniObject *object;
+  guint size;
+  guint64 duration;
+  gboolean visible;
+
+  /* user supplied destroy function */
+  GDestroyNotify destroy;
+};
+
+/**
+ * GstDataQueueSize:
+ * @visible: number of buffers
+ * @bytes: number of bytes
+ * @time: amount of time
+ *
+ * Structure describing the size of a queue.
+ */
+struct _GstDataQueueSize
+{
+  guint visible;
+  guint bytes;
+  guint64 time;
+};
+
+/**
+ * GstDataQueueCheckFullFunction:
+ * @queue: a #GstDataQueue.
+ * @visible: The number of visible items currently in the queue.
+ * @bytes: The amount of bytes currently in the queue.
+ * @time: The accumulated duration of the items currently in the queue.
+ * @checkdata: The #gpointer registered when the #GstDataQueue was created.
+ * 
+ * The prototype of the function used to inform the queue that it should be
+ * considered as full.
+ *
+ * Returns: #TRUE if the queue should be considered full.
+ */
+typedef gboolean (*GstDataQueueCheckFullFunction) (GstDataQueue * queue,
+    guint visible, guint bytes, guint64 time, gpointer checkdata);
+
+/**
+ * GstDataQueue:
+ *
+ * Opaque #GstDataQueue structure.
+ */
+struct _GstDataQueue
+{
+  GObject object;
+
+  /*< private > */
+  /* the queue of data we're keeping our grubby hands on */
+  GQueue *queue;
+
+  GstDataQueueSize cur_level;   /* size of the queue */
+  GstDataQueueCheckFullFunction checkfull;      /* Callback to check if the queue is full */
+  gpointer *checkdata;
+
+  GMutex *qlock;                /* lock for queue (vs object lock) */
+  GCond *item_add;              /* signals buffers now available for reading */
+  GCond *item_del;              /* signals space now available for writing */
+  gboolean flushing;            /* indicates whether conditions where signalled because
+                                 * of external flushing */
+
+  gpointer _gst_reserved[GST_PADDING];
+};
+
+struct _GstDataQueueClass
+{
+  GObjectClass parent_class;
+
+  /* signals */
+  void (*empty) (GstDataQueue * queue);
+  void (*full) (GstDataQueue * queue);
+
+  gpointer _gst_reserved[GST_PADDING];
+};
+#ifdef __SYMBIAN32__
+IMPORT_C
+#endif
+
+
+GType gst_data_queue_get_type (void);
+#ifdef __SYMBIAN32__
+IMPORT_C
+#endif
+
+
+GstDataQueue * gst_data_queue_new            (GstDataQueueCheckFullFunction checkfull,
+                                              gpointer checkdata);
+#ifdef __SYMBIAN32__
+IMPORT_C
+#endif
+
+
+gboolean       gst_data_queue_push           (GstDataQueue * queue, GstDataQueueItem * item);
+#ifdef __SYMBIAN32__
+IMPORT_C
+#endif
+
+gboolean       gst_data_queue_pop            (GstDataQueue * queue, GstDataQueueItem ** item);
+#ifdef __SYMBIAN32__
+IMPORT_C
+#endif
+
+
+void           gst_data_queue_flush          (GstDataQueue * queue);
+#ifdef __SYMBIAN32__
+IMPORT_C
+#endif
+
+void           gst_data_queue_set_flushing   (GstDataQueue * queue, gboolean flushing);
+#ifdef __SYMBIAN32__
+IMPORT_C
+#endif
+
+
+gboolean       gst_data_queue_drop_head      (GstDataQueue * queue, GType type);
+#ifdef __SYMBIAN32__
+IMPORT_C
+#endif
+
+
+gboolean       gst_data_queue_is_full        (GstDataQueue * queue);
+#ifdef __SYMBIAN32__
+IMPORT_C
+#endif
+
+gboolean       gst_data_queue_is_empty       (GstDataQueue * queue);
+#ifdef __SYMBIAN32__
+IMPORT_C
+#endif
+
+
+void           gst_data_queue_get_level      (GstDataQueue * queue, GstDataQueueSize *level);
+#ifdef __SYMBIAN32__
+IMPORT_C
+#endif
+
+void           gst_data_queue_limits_changed (GstDataQueue * queue);
+
+G_END_DECLS
+
+#endif /* __GST_DATA_QUEUE_H__ */