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 add_cropmeta;
58 gboolean can_alloc; /* if extra buffers can be allocated */
60 guint num_buffers; /* number of buffers we use */
61 guint num_allocated; /* number of buffers allocated by the driver */
62 guint num_queued; /* number of buffers queued in the driver */
63 guint copy_threshold; /* when our pool runs lower, start handing out copies */
70 struct _GstV4l2BufferPoolClass
72 GstBufferPoolClass parent_class;
78 /* number of v4l2 planes
79 * In MPLANE and non MPLANE case it can be one so
80 * it contains all yuv planes
81 * In MPLANE mode it can be one per yuv plane.
82 * For example, 2 for NV12 and 3 for I420
84 * In non MPLANE mode it's always equal to 1
85 * In MPLANE mode it's equivalent to vbuffer.length
89 /* only useful in GST_V4L2_IO_MMAP case.
90 * it contains address at which the mapping
91 * was placed for each v4l2 plane */
92 gpointer mem[GST_VIDEO_MAX_PLANES];
94 /* plane info for multi-planar buffers */
95 struct v4l2_plane vplanes[GST_VIDEO_MAX_PLANES];
97 /* video buffer info */
98 struct v4l2_buffer vbuffer;
101 GType gst_v4l2_meta_api_get_type (void);
102 const GstMetaInfo * gst_v4l2_meta_get_info (void);
103 #define GST_V4L2_META_GET(buf) ((GstV4l2Meta *)gst_buffer_get_meta(buf,gst_v4l2_meta_api_get_type()))
104 #define GST_V4L2_META_ADD(buf) ((GstV4l2Meta *)gst_buffer_add_meta(buf,gst_v4l2_meta_get_info(),NULL))
106 GType gst_v4l2_buffer_pool_get_type (void);
108 GstBufferPool * gst_v4l2_buffer_pool_new (GstV4l2Object *obj, GstCaps *caps);
110 GstFlowReturn gst_v4l2_buffer_pool_process (GstV4l2BufferPool * bpool, GstBuffer * buf);
112 gboolean gst_v4l2_buffer_pool_flush (GstV4l2BufferPool * pool);
114 void gst_v4l2_buffer_pool_add_crop_meta (GstV4l2BufferPool * bpool, gboolean add);
118 #endif /*__GST_V4L2_BUFFER_POOL_H__ */