3 * Copyright (C) 2001-2002 Ronald Bultje <rbultje@ronald.bitfreak.net>
4 * 2006 Edgard Lima <edgard.lima@indt.org.br>
5 * 2009 Texas Instruments, Inc - http://www.ti.com/
7 * gstv4l2bufferpool.h V4L2 buffer pool class
9 * This library is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU Library General Public
11 * License as published by the Free Software Foundation; either
12 * version 2 of the License, or (at your option) any later version.
14 * This library is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17 * Library General Public License for more details.
19 * You should have received a copy of the GNU Library General Public
20 * License along with this library; if not, write to the
21 * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
22 * Boston, MA 02111-1307, USA.
25 #ifndef __GSTV4L2BUFFER_H__
26 #define __GSTV4L2BUFFER_H__
29 #include "v4l2_calls.h"
31 GST_DEBUG_CATEGORY_EXTERN (v4l2buffer_debug);
36 GType gst_v4l2_buffer_get_type (void);
37 #define GST_TYPE_V4L2_BUFFER (gst_v4l2_buffer_get_type())
38 #define GST_IS_V4L2_BUFFER(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_V4L2_BUFFER))
39 #define GST_V4L2_BUFFER(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_V4L2_BUFFER, GstV4l2Buffer))
41 GType gst_v4l2_buffer_pool_get_type (void);
42 #define GST_TYPE_V4L2_BUFFER_POOL (gst_v4l2_buffer_pool_get_type())
43 #define GST_IS_V4L2_BUFFER_POOL(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_V4L2_BUFFER_POOL))
44 #define GST_V4L2_BUFFER_POOL(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_V4L2_BUFFER_POOL, GstV4l2BufferPool))
48 typedef struct _GstV4l2BufferPool GstV4l2BufferPool;
49 typedef struct _GstV4l2Buffer GstV4l2Buffer;
52 struct _GstV4l2BufferPool
56 GstElement *v4l2elem; /* the v4l2 src/sink that owns us.. maybe we should be owned by v4l2object? */
57 gboolean requeuebuf; /* if true, unusued buffers are automatically re-QBUF'd */
58 enum v4l2_buf_type type; /* V4L2_BUF_TYPE_VIDEO_CAPTURE, V4L2_BUF_TYPE_VIDEO_OUTPUT */
61 gboolean running; /* with lock */
62 gint num_live_buffers; /* number of buffers not with driver */
63 GAsyncQueue* avail_buffers;/* pool of available buffers, not with the driver and which aren't held outside the bufferpool */
64 gint video_fd; /* a dup(2) of the v4l2object's video_fd */
66 GstV4l2Buffer **buffers;
69 struct _GstV4l2Buffer {
72 struct v4l2_buffer vbuffer;
74 /* FIXME: have GstV4l2Src* instead, as this has GstV4l2BufferPool* */
75 /* FIXME: do we really want to fix this if GstV4l2Buffer/Pool is shared
76 * between v4l2src and v4l2sink??
78 GstV4l2BufferPool *pool;
83 void gst_v4l2_buffer_pool_destroy (GstV4l2BufferPool * pool);
84 GstV4l2BufferPool *gst_v4l2_buffer_pool_new (GstElement *v4l2elem, gint fd, gint num_buffers, GstCaps * caps, gboolean requeuebuf, enum v4l2_buf_type type);
87 GstV4l2Buffer *gst_v4l2_buffer_pool_get (GstV4l2BufferPool *pool);
88 gboolean gst_v4l2_buffer_pool_qbuf (GstV4l2BufferPool *pool, GstV4l2Buffer *buf);
89 GstV4l2Buffer *gst_v4l2_buffer_pool_dqbuf (GstV4l2BufferPool *pool);
91 gint gst_v4l2_buffer_pool_available_buffers (GstV4l2BufferPool *pool);
94 #define GST_V4L2_BUFFER_POOL_LOCK(pool) g_mutex_lock ((pool)->lock)
95 #define GST_V4L2_BUFFER_POOL_UNLOCK(pool) g_mutex_unlock ((pool)->lock)
97 #endif /* __GSTV4L2BUFFER_H__ */