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3f83ca9c43
It might cause deadlocks to post messages while holding the multiqueue lock. To avoid this a new boolean flag is set whenever a new buffering percent is found. The message is posted after the lock can be released. To make sure the buffering messages are posted in the right order, messages are posted holding another lock. This prevents 2 threads trying to post messages at the same time. https://bugzilla.gnome.org/show_bug.cgi?id=736295
96 lines
2.8 KiB
C
96 lines
2.8 KiB
C
/* GStreamer
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* Copyright (C) 2006 Edward Hervey <edward@fluendo.com>
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*
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* gstmultiqueue.h:
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*/
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#ifndef __GST_MULTI_QUEUE_H__
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#define __GST_MULTI_QUEUE_H__
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#include <gst/gst.h>
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#include <gst/base/gstdataqueue.h>
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G_BEGIN_DECLS
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#define GST_TYPE_MULTI_QUEUE \
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(gst_multi_queue_get_type())
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#define GST_MULTI_QUEUE(obj) \
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(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_MULTI_QUEUE,GstMultiQueue))
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#define GST_MULTI_QUEUE_CLASS(klass) \
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(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_MULTI_QUEUE,GstMultiQueueClass))
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#define GST_IS_MULTI_QUEUE(obj) \
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(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_MULTI_QUEUE))
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#define GST_IS_MULTI_QUEUE_CLASS(obj) \
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(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_MULTI_QUEUE))
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typedef struct _GstMultiQueue GstMultiQueue;
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typedef struct _GstMultiQueueClass GstMultiQueueClass;
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/**
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* GstMultiQueue:
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*
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* Opaque #GstMultiQueue structure.
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*/
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struct _GstMultiQueue {
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GstElement element;
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gboolean sync_by_running_time;
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/* number of queues */
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guint nbqueues;
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/* The list of individual queues */
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GList *queues;
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guint32 queues_cookie;
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GstDataQueueSize max_size, extra_size;
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gboolean use_buffering;
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gint low_percent, high_percent;
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gboolean buffering;
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gint percent;
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guint counter; /* incoming object counter, use atomic accesses */
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guint32 highid; /* contains highest id of last outputted object */
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GstClockTime high_time; /* highest start running time */
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GMutex qlock; /* Global queue lock (vs object lock or individual */
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/* queues lock). Protects nbqueues, queues, global */
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/* GstMultiQueueSize, counter and highid */
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gint numwaiting; /* number of not-linked pads waiting */
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gboolean percent_changed;
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GMutex buffering_post_lock; /* assures only one posted at a time */
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};
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struct _GstMultiQueueClass {
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GstElementClass parent_class;
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/* signals emitted when ALL queues are either full or empty */
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void (*underrun) (GstMultiQueue *queue);
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void (*overrun) (GstMultiQueue *queue);
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};
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G_GNUC_INTERNAL GType gst_multi_queue_get_type (void);
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G_END_DECLS
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#endif /* __GST_MULTI_QUEUE_H__ */
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