gstreamer/libs/gst/base/gstdataqueue.h
Edward Hervey fdb51251dd libs/gst/base/: New GstDataQueue object for threadsafe queueing. Most useful for elements that need some queueing fun...
Original commit message from CVS:
* libs/gst/base/Makefile.am:
* libs/gst/base/gstdataqueue.c: (gst_data_queue_get_type),
(gst_data_queue_base_init), (gst_data_queue_class_init),
(gst_data_queue_init), (gst_data_queue_new),
(gst_data_queue_cleanup), (gst_data_queue_finalize),
(gst_data_queue_locked_flush), (gst_data_queue_locked_is_empty),
(gst_data_queue_locked_is_full), (gst_data_queue_flush),
(gst_data_queue_is_empty), (gst_data_queue_is_full),
(gst_data_queue_set_flushing), (gst_data_queue_push),
(gst_data_queue_pop), (gst_data_queue_drop_head),
(gst_data_queue_set_property), (gst_data_queue_get_property):
* libs/gst/base/gstdataqueue.h:
New GstDataQueue object for threadsafe queueing. Most useful for
elements that need some queueing functionnality.
* docs/libs/gstreamer-libs-docs.sgml:
* docs/libs/gstreamer-libs-sections.txt:
Insert documentation for GstDataQueue
* plugins/elements/Makefile.am:
* plugins/elements/gstelements.c:
* plugins/elements/gstmultiqueue.c: (gst_multi_queue_base_init),
(gst_multi_queue_class_init), (gst_multi_queue_init),
(gst_multi_queue_finalize), (gst_multi_queue_set_property),
(gst_multi_queue_get_property), (gst_multi_queue_request_new_pad),
(gst_multi_queue_release_pad), (gst_single_queue_push_one),
(gst_multi_queue_item_destroy), (gst_multi_queue_item_new),
(gst_multi_queue_loop), (gst_multi_queue_chain),
(gst_multi_queue_sink_activate_push), (gst_multi_queue_sink_event),
(gst_multi_queue_getcaps), (gst_multi_queue_bufferalloc),
(gst_multi_queue_src_activate_push), (gst_multi_queue_acceptcaps),
(gst_multi_queue_src_event), (gst_multi_queue_src_query),
(wake_up_next_non_linked), (compute_next_non_linked),
(single_queue_overrun_cb), (single_queue_underrun_cb),
(single_queue_check_full), (gst_single_queue_new):
* plugins/elements/gstmultiqueue.h:
New multiqueue element, using GstDataQueue. Used for queuing multiple
streams.
Closes #344639 and #347785
2006-11-28 12:07:06 +00:00

153 lines
4.7 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 to use to free the #GstDataQueueItem.
*
* 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;
};
/**
* GstDataQueueSize:
* @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:
* @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);
/**
* GstDataQueue:
*
* Opaque #GstDataQueue structure.
*/
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) */
GCond *item_add; /* signals buffers now available for reading */
GCond *item_del; /* signals space now available for writing */
gboolean flushing; /* indicates whether conditions where signalled because
* of external flushing */
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);
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);
G_END_DECLS
#endif /* __GST_DATA_QUEUE_H__ */