mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
synced 2024-12-25 09:40:37 +00:00
6f042f13ae
During FLUSH_START the query needs to be unblocked already, otherwise it can lead to deadlocks if the FLUSH_START is the result of something done from the streaming thread of the srcpad (the queue will never be emptied!).
159 lines
4.4 KiB
C
159 lines
4.4 KiB
C
/* GStreamer
|
|
* Copyright (C) 1999,2000 Erik Walthinsen <omega@cse.ogi.edu>
|
|
* 2000 Wim Taymans <wtay@chello.be>
|
|
*
|
|
* gstqueue.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_QUEUE_H__
|
|
#define __GST_QUEUE_H__
|
|
|
|
#include <gst/gst.h>
|
|
#include <gst/base/gstqueuearray.h>
|
|
|
|
G_BEGIN_DECLS
|
|
|
|
#define GST_TYPE_QUEUE \
|
|
(gst_queue_get_type())
|
|
#define GST_QUEUE(obj) \
|
|
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_QUEUE,GstQueue))
|
|
#define GST_QUEUE_CLASS(klass) \
|
|
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_QUEUE,GstQueueClass))
|
|
#define GST_IS_QUEUE(obj) \
|
|
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_QUEUE))
|
|
#define GST_IS_QUEUE_CLASS(klass) \
|
|
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_QUEUE))
|
|
#define GST_QUEUE_CAST(obj) \
|
|
((GstQueue *)(obj))
|
|
|
|
typedef struct _GstQueue GstQueue;
|
|
typedef struct _GstQueueSize GstQueueSize;
|
|
typedef enum _GstQueueLeaky GstQueueLeaky;
|
|
typedef struct _GstQueueClass GstQueueClass;
|
|
|
|
/**
|
|
* GstQueueLeaky:
|
|
* @GST_QUEUE_NO_LEAK: Not Leaky
|
|
* @GST_QUEUE_LEAK_UPSTREAM: Leaky on upstream (new buffers)
|
|
* @GST_QUEUE_LEAK_DOWNSTREAM: Leaky on downstream (old buffers)
|
|
*
|
|
* Buffer dropping scheme to avoid the queue to block when full.
|
|
*/
|
|
enum _GstQueueLeaky {
|
|
GST_QUEUE_NO_LEAK = 0,
|
|
GST_QUEUE_LEAK_UPSTREAM = 1,
|
|
GST_QUEUE_LEAK_DOWNSTREAM = 2
|
|
};
|
|
|
|
/*
|
|
* GstQueueSize:
|
|
* @buffers: number of buffers
|
|
* @bytes: number of bytes
|
|
* @time: amount of time
|
|
*
|
|
* Structure describing the size of a queue.
|
|
*/
|
|
struct _GstQueueSize {
|
|
guint buffers;
|
|
guint bytes;
|
|
guint64 time;
|
|
};
|
|
|
|
#define GST_QUEUE_CLEAR_LEVEL(l) G_STMT_START { \
|
|
l.buffers = 0; \
|
|
l.bytes = 0; \
|
|
l.time = 0; \
|
|
} G_STMT_END
|
|
|
|
/**
|
|
* GstQueue:
|
|
*
|
|
* Opaque #GstQueue structure.
|
|
*/
|
|
struct _GstQueue {
|
|
GstElement element;
|
|
|
|
/*< private >*/
|
|
GstPad *sinkpad;
|
|
GstPad *srcpad;
|
|
|
|
/* segments to keep track of timestamps */
|
|
GstSegment sink_segment;
|
|
GstSegment src_segment;
|
|
|
|
/* position of src/sink */
|
|
GstClockTime sinktime, srctime;
|
|
/* TRUE if either position needs to be recalculated */
|
|
gboolean sink_tainted, src_tainted;
|
|
|
|
/* flowreturn when srcpad is paused */
|
|
GstFlowReturn srcresult;
|
|
gboolean unexpected;
|
|
gboolean eos;
|
|
|
|
/* the queue of data we're keeping our grubby hands on */
|
|
GstQueueArray *queue;
|
|
|
|
GstQueueSize
|
|
cur_level, /* currently in the queue */
|
|
max_size, /* max. amount of data allowed in the queue */
|
|
min_threshold, /* min. amount of data required to wake reader */
|
|
orig_min_threshold; /* Original min.threshold, for reset in EOS */
|
|
|
|
/* whether we leak data, and at which end */
|
|
gint leaky;
|
|
|
|
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 head_needs_discont, tail_needs_discont;
|
|
gboolean push_newsegment;
|
|
|
|
gboolean silent; /* don't emit signals */
|
|
|
|
/* whether the first new segment has been applied to src */
|
|
gboolean newseg_applied_to_src;
|
|
|
|
GCond query_handled;
|
|
gboolean last_query;
|
|
|
|
gboolean flush_on_eos; /* flush on EOS */
|
|
};
|
|
|
|
struct _GstQueueClass {
|
|
GstElementClass parent_class;
|
|
|
|
/* signals - 'running' is called from both sides
|
|
* which might make it sort of non-useful... */
|
|
void (*underrun) (GstQueue *queue);
|
|
void (*running) (GstQueue *queue);
|
|
void (*overrun) (GstQueue *queue);
|
|
|
|
void (*pushing) (GstQueue *queue);
|
|
};
|
|
|
|
G_GNUC_INTERNAL GType gst_queue_get_type (void);
|
|
|
|
G_END_DECLS
|
|
|
|
|
|
#endif /* __GST_QUEUE_H__ */
|