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99e2ac121d
It seems to cause strange occasional high latencies (almost 200ms) when dequeuing buffers from _buffer_alloc(). It is simpler and seems to work much better to dqbuf from the same thread that is queuing the next buffer.
97 lines
3.5 KiB
C
97 lines
3.5 KiB
C
/* GStreamer
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*
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* Copyright (C) 2001-2002 Ronald Bultje <rbultje@ronald.bitfreak.net>
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* 2006 Edgard Lima <edgard.lima@indt.org.br>
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* 2009 Texas Instruments, Inc - http://www.ti.com/
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*
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* gstv4l2src.h: BT8x8/V4L2 source element
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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., 59 Temple Place - Suite 330,
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* Boston, MA 02111-1307, USA.
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*/
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#ifndef __GSTV4L2BUFFER_H__
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#define __GSTV4L2BUFFER_H__
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#include <gst/gst.h>
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#include "v4l2_calls.h"
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GST_DEBUG_CATEGORY_EXTERN (v4l2buffer_debug);
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G_BEGIN_DECLS
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GType gst_v4l2_buffer_get_type (void);
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#define GST_TYPE_V4L2_BUFFER (gst_v4l2_buffer_get_type())
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#define GST_IS_V4L2_BUFFER(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_V4L2_BUFFER))
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#define GST_V4L2_BUFFER(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_V4L2_BUFFER, GstV4l2Buffer))
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GType gst_v4l2_buffer_pool_get_type (void);
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#define GST_TYPE_V4L2_BUFFER_POOL (gst_v4l2_buffer_pool_get_type())
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#define GST_IS_V4L2_BUFFER_POOL(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_V4L2_BUFFER_POOL))
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#define GST_V4L2_BUFFER_POOL(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_V4L2_BUFFER_POOL, GstV4l2BufferPool))
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typedef struct _GstV4l2BufferPool GstV4l2BufferPool;
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typedef struct _GstV4l2Buffer GstV4l2Buffer;
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struct _GstV4l2BufferPool
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{
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GstMiniObject parent;
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GstElement *v4l2elem; /* the v4l2 src/sink that owns us.. maybe we should be owned by v4l2object? */
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gboolean requeuebuf; /* if true, unusued buffers are automatically re-QBUF'd */
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enum v4l2_buf_type type; /* V4L2_BUF_TYPE_VIDEO_CAPTURE, V4L2_BUF_TYPE_VIDEO_OUTPUT */
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GMutex *lock;
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gboolean running; /* with lock */
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gint num_live_buffers; /* number of buffers not with driver */
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GAsyncQueue* avail_buffers;/* pool of available buffers, not with the driver and which aren't held outside the bufferpool */
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gint video_fd; /* a dup(2) of the v4l2object's video_fd */
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guint buffer_count;
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GstV4l2Buffer **buffers;
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};
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struct _GstV4l2Buffer {
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GstBuffer buffer;
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struct v4l2_buffer vbuffer;
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/* FIXME: have GstV4l2Src* instead, as this has GstV4l2BufferPool* */
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/* FIXME: do we really want to fix this if GstV4l2Buffer/Pool is shared
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* between v4l2src and v4l2sink??
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*/
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GstV4l2BufferPool *pool;
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};
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G_END_DECLS
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void gst_v4l2_buffer_pool_destroy (GstV4l2BufferPool * pool);
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GstV4l2BufferPool *gst_v4l2_buffer_pool_new (GstElement *v4l2elem, gint fd, gint num_buffers, GstCaps * caps, gboolean requeuebuf, enum v4l2_buf_type type);
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GstV4l2Buffer *gst_v4l2_buffer_pool_get (GstV4l2BufferPool *pool);
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gboolean gst_v4l2_buffer_pool_qbuf (GstV4l2BufferPool *pool, GstV4l2Buffer *buf);
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GstV4l2Buffer *gst_v4l2_buffer_pool_dqbuf (GstV4l2BufferPool *pool);
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gint gst_v4l2_buffer_pool_available_buffers (GstV4l2BufferPool *pool);
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#define GST_V4L2_BUFFER_POOL_LOCK(pool) g_mutex_lock ((pool)->lock)
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#define GST_V4L2_BUFFER_POOL_UNLOCK(pool) g_mutex_unlock ((pool)->lock)
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#endif /* __GSTV4L2BUFFER_H__ */
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