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/* GStreamer
* Copyright (C) 2006 Edward Hervey <>
* 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
* 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., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
#ifndef __GST_DATA_QUEUE_H__
#define __GST_DATA_QUEUE_H__
#include <gst/gst.h>
#define GST_DATA_QUEUE(obj) \
#define GST_DATA_QUEUE_CLASS(klass) \
#define GST_IS_DATA_QUEUE(obj) \
#define GST_IS_DATA_QUEUE_CLASS(klass) \
typedef struct _GstDataQueue GstDataQueue;
typedef struct _GstDataQueueClass GstDataQueueClass;
typedef struct _GstDataQueueSize GstDataQueueSize;
typedef struct _GstDataQueueItem GstDataQueueItem;
typedef struct _GstDataQueuePrivate GstDataQueuePrivate;
* GstDataQueueItem: (skip)
* @object: the #GstMiniObject to queue.
* @size: the size in bytes of the miniobject.
* @duration: the duration in #GstClockTime of the miniobject. Can not be
* @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;
/* < private > */
gpointer _gst_reserved[GST_PADDING];
* GstDataQueueSize: (skip)
* @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: (skip)
* @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);
typedef void (*GstDataQueueFullCallback) (GstDataQueue * queue, gpointer checkdata);
typedef void (*GstDataQueueEmptyCallback) (GstDataQueue * queue, gpointer checkdata);
* GstDataQueue:
* @object: the parent structure
* Opaque #GstDataQueue structure.
struct _GstDataQueue
GObject object;
/*< private >*/
GstDataQueuePrivate *priv;
gpointer _gst_reserved[GST_PADDING];
* GstDataQueueClass:
struct _GstDataQueueClass
GObjectClass parent_class;
/* signals */
void (*empty) (GstDataQueue * queue);
void (*full) (GstDataQueue * queue);
gpointer _gst_reserved[GST_PADDING];
GType gst_data_queue_get_type (void);
GstDataQueue * gst_data_queue_new (GstDataQueueCheckFullFunction checkfull,
GstDataQueueFullCallback fullcallback,
GstDataQueueEmptyCallback emptycallback,
gpointer checkdata) G_GNUC_MALLOC;
gboolean gst_data_queue_push (GstDataQueue * queue, GstDataQueueItem * item);
gboolean gst_data_queue_push_force (GstDataQueue * queue, GstDataQueueItem * item);
gboolean gst_data_queue_pop (GstDataQueue * queue, GstDataQueueItem ** item);
gboolean gst_data_queue_peek (GstDataQueue * queue, GstDataQueueItem ** item);
void gst_data_queue_flush (GstDataQueue * queue);
void gst_data_queue_set_flushing (GstDataQueue * queue, gboolean flushing);
gboolean gst_data_queue_drop_head (GstDataQueue * queue, GType type);
gboolean gst_data_queue_is_full (GstDataQueue * queue);
gboolean gst_data_queue_is_empty (GstDataQueue * queue);
void gst_data_queue_get_level (GstDataQueue * queue, GstDataQueueSize *level);
void gst_data_queue_limits_changed (GstDataQueue * queue);
#endif /* __GST_DATA_QUEUE_H__ */