gstreamer/plugins/elements/gstmultiqueue.h
Carlos Rafael Giani 67874ea86d multiqueue: Distinguish between buffering percentage and buffering level
To make the code clearer, and to facilitate future improvements, introduce
a distinction between the buffering level and the buffering percentage.

Buffering level: the queue's current fill level. The low/high watermarks
are in this range.

Buffering percentage: percentage relative to the low/high watermarks
(0% = low watermark, 100% = high watermark).

To that end, get_percentage() is renamed to get_buffering_level(). Also,
low/high_percent are renamed to low/high_watermark to avoid confusion.
mq->buffering_percent values are now normalized in the 0..100 range for
buffering messages inside update_buffering(), and not just before sending
the buffering message. Finally the buffering level range is parameterized
by adding a new constant called MAX_BUFFERING_LEVEL.

https://bugzilla.gnome.org/show_bug.cgi?id=770628
2016-08-31 12:56:19 +03:00

104 lines
3 KiB
C

/* GStreamer
* Copyright (C) 2006 Edward Hervey <edward@fluendo.com>
*
* gstmultiqueue.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., 51 Franklin St, Fifth Floor,
* Boston, MA 02110-1301, USA.
*/
#ifndef __GST_MULTI_QUEUE_H__
#define __GST_MULTI_QUEUE_H__
#include <gst/gst.h>
#include <gst/base/gstdataqueue.h>
G_BEGIN_DECLS
#define GST_TYPE_MULTI_QUEUE \
(gst_multi_queue_get_type())
#define GST_MULTI_QUEUE(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_MULTI_QUEUE,GstMultiQueue))
#define GST_MULTI_QUEUE_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_MULTI_QUEUE,GstMultiQueueClass))
#define GST_IS_MULTI_QUEUE(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_MULTI_QUEUE))
#define GST_IS_MULTI_QUEUE_CLASS(obj) \
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_MULTI_QUEUE))
typedef struct _GstMultiQueue GstMultiQueue;
typedef struct _GstMultiQueueClass GstMultiQueueClass;
typedef struct _GstMultiQueuePad GstMultiQueuePad;
typedef struct _GstMultiQueuePadClass GstMultiQueuePadClass;
/**
* GstMultiQueue:
*
* Opaque #GstMultiQueue structure.
*/
struct _GstMultiQueue {
GstElement element;
gboolean sync_by_running_time;
gboolean use_interleave;
/* number of queues */
guint nbqueues;
/* The list of individual queues */
GList *queues;
guint32 queues_cookie;
GstDataQueueSize max_size, extra_size;
gboolean use_buffering;
gint low_watermark, high_watermark;
gboolean buffering;
gint buffering_percent;
guint counter; /* incoming object counter, use atomic accesses */
guint32 highid; /* contains highest id of last outputted object */
GstClockTimeDiff high_time; /* highest start running time */
GMutex qlock; /* Global queue lock (vs object lock or individual */
/* queues lock). Protects nbqueues, queues, global */
/* GstMultiQueueSize, counter and highid */
gint numwaiting; /* number of not-linked pads waiting */
gboolean buffering_percent_changed;
GMutex buffering_post_lock; /* assures only one posted at a time */
GstClockTime interleave; /* Input interleave */
GstClockTimeDiff last_interleave_update;
GstClockTime unlinked_cache_time;
};
struct _GstMultiQueueClass {
GstElementClass parent_class;
/* signals emitted when ALL queues are either full or empty */
void (*underrun) (GstMultiQueue *queue);
void (*overrun) (GstMultiQueue *queue);
};
G_GNUC_INTERNAL GType gst_multi_queue_get_type (void);
G_END_DECLS
#endif /* __GST_MULTI_QUEUE_H__ */