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., 51 Franklin St, Fifth Floor,
22 * Boston, MA 02110-1301, USA.
25 #ifndef __GST_V4L2_BUFFER_POOL_H__
26 #define __GST_V4L2_BUFFER_POOL_H__
30 typedef struct _GstV4l2BufferPool GstV4l2BufferPool;
31 typedef struct _GstV4l2BufferPoolClass GstV4l2BufferPoolClass;
32 typedef struct _GstV4l2Meta GstV4l2Meta;
34 #include "gstv4l2object.h"
36 GST_DEBUG_CATEGORY_EXTERN (v4l2buffer_debug);
41 #define GST_TYPE_V4L2_BUFFER_POOL (gst_v4l2_buffer_pool_get_type())
42 #define GST_IS_V4L2_BUFFER_POOL(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_V4L2_BUFFER_POOL))
43 #define GST_V4L2_BUFFER_POOL(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_V4L2_BUFFER_POOL, GstV4l2BufferPool))
44 #define GST_V4L2_BUFFER_POOL_CAST(obj) ((GstV4l2BufferPool*)(obj))
46 struct _GstV4l2BufferPool
50 GstV4l2Object *obj; /* the v4l2 object */
51 gint video_fd; /* a dup(2) of the v4l2object's video_fd */
53 GstAllocator *allocator;
54 GstAllocationParams params;
56 gboolean add_videometa;
57 gboolean can_alloc; /* if extra buffers can be allocated */
59 guint num_buffers; /* number of buffers we use */
60 guint num_allocated; /* number of buffers allocated by the driver */
61 guint num_queued; /* number of buffers queued in the driver */
62 guint copy_threshold; /* when our pool runs lower, start handing out copies */
69 struct _GstV4l2BufferPoolClass
71 GstBufferPoolClass parent_class;
77 /* VIDEO_MAX_PLANES is defined to 8 in videodev2.h
78 * whereas GST_VIDEO_MAX_PLANES is defined to 4 in
79 * video-format.h so lets use the minimum */
81 /* only useful in GST_V4L2_IO_MMAP case.
82 * it contains address at which the mapping
83 * was placed for each v4l2 plane */
84 gpointer mem[GST_VIDEO_MAX_PLANES];
85 /* plane info for multi-planar buffers */
86 struct v4l2_plane vplanes[GST_VIDEO_MAX_PLANES];
87 /* video buffer info */
88 struct v4l2_buffer vbuffer;
91 GType gst_v4l2_meta_api_get_type (void);
92 const GstMetaInfo * gst_v4l2_meta_get_info (void);
93 #define GST_V4L2_META_GET(buf) ((GstV4l2Meta *)gst_buffer_get_meta(buf,gst_v4l2_meta_api_get_type()))
94 #define GST_V4L2_META_ADD(buf) ((GstV4l2Meta *)gst_buffer_add_meta(buf,gst_v4l2_meta_get_info(),NULL))
96 GType gst_v4l2_buffer_pool_get_type (void);
98 GstBufferPool * gst_v4l2_buffer_pool_new (GstV4l2Object *obj, GstCaps *caps);
100 GstFlowReturn gst_v4l2_buffer_pool_process (GstV4l2BufferPool * bpool, GstBuffer * buf);
104 #endif /*__GST_V4L2_BUFFER_POOL_H__ */