2 * Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
3 * 2000 Wim Taymans <wtay@chello.be>
7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Library General Public
9 * License as published by the Free Software Foundation; either
10 * version 2 of the License, or (at your option) any later version.
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Library General Public License for more details.
17 * You should have received a copy of the GNU Library General Public
18 * License along with this library; if not, write to the
19 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
20 * Boston, MA 02111-1307, USA.
24 #ifndef __GST_QUEUE_H__
25 #define __GST_QUEUE_H__
28 #include <gst/gstelement.h>
33 #define GST_TYPE_QUEUE \
34 (gst_queue_get_type())
35 #define GST_QUEUE(obj) \
36 (G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_QUEUE,GstQueue))
37 #define GST_QUEUE_CLASS(klass) \
38 (G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_QUEUE,GstQueueClass))
39 #define GST_IS_QUEUE(obj) \
40 (G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_QUEUE))
41 #define GST_IS_QUEUE_CLASS(obj) \
42 (G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_QUEUE))
45 GST_QUEUE_NO_LEAK = 0,
46 GST_QUEUE_LEAK_UPSTREAM = 1,
47 GST_QUEUE_LEAK_DOWNSTREAM = 2
50 typedef struct _GstQueue GstQueue;
51 typedef struct _GstQueueClass GstQueueClass;
59 /* the queue of buffers we're keeping our grubby hands on */
62 guint level_buffers; /* number of buffers queued here */
63 guint level_bytes; /* number of bytes queued here */
64 guint64 level_time; /* amount of time queued here */
66 guint size_buffers; /* size of queue in buffers */
67 guint size_bytes; /* size of queue in bytes */
68 guint64 size_time; /* size of queue in time */
70 gint leaky; /* whether the queue is leaky, and if so at which end */
71 gint block_timeout; /* microseconds until a blocked queue times out and returns GST_EVENT_FILLER.
72 * A value of -1 will block forever. */
73 guint min_threshold_bytes; /* the minimum number of bytes required before
74 * waking up the reader thread */
75 gboolean may_deadlock; /* it the queue should fail on possible deadlocks */
79 GMutex *qlock; /* lock for queue (vs object lock) */
80 GCond *not_empty; /* signals buffers now available for reading */
81 GCond *not_full; /* signals space now available for writing */
83 GTimeVal *timeval; /* the timeout for the queue locking */
84 GAsyncQueue *events; /* upstream events get decoupled here */
86 gpointer _gst_reserved[GST_PADDING];
89 struct _GstQueueClass {
90 GstElementClass parent_class;
92 /* signal callbacks */
93 void (*full) (GstQueue *queue);
95 gpointer _gst_reserved[GST_PADDING];
98 GType gst_queue_get_type (void);
103 #endif /* __GST_QUEUE_H__ */