gstreamer/plugins/elements/gstdataqueue.h
Tim-Philipp Müller 434e7042d8 base: make GstDataQueue private API for multiqueue
There's no code that uses it other than multiqueue, so make it private
to multiqueue for now. That way we can also do optimisations that
require API/ABI breaks. If anyone ever wants to use it, we can still
make it public again.
2011-10-07 13:54:37 +01:00

180 lines
5.8 KiB
C

/* 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.
*
* Since: 0.10.11
*/
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.
*
* Since: 0.10.11
*/
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.
*
* Since: 0.10.11
*/
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.
*
* Since: 0.10.11
*/
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) */
gboolean waiting_add;
GCond *item_add; /* signals buffers now available for reading */
gboolean waiting_del;
GCond *item_del; /* signals space now available for writing */
gboolean flushing; /* indicates whether conditions where signalled because
* of external flushing */
GstDataQueueFullCallback fullcallback;
GstDataQueueEmptyCallback emptycallback;
gpointer _gst_reserved[GST_PADDING];
};
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,
gpointer checkdata);
GstDataQueue * gst_data_queue_new_full (GstDataQueueCheckFullFunction checkfull,
GstDataQueueFullCallback fullcallback,
GstDataQueueEmptyCallback emptycallback,
gpointer checkdata);
gboolean gst_data_queue_push (GstDataQueue * queue, GstDataQueueItem * item);
gboolean gst_data_queue_pop (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);
G_END_DECLS
#endif /* __GST_DATA_QUEUE_H__ */