3 * Copyright (C) 2001-2002 Ronald Bultje <rbultje@ronald.bitfreak.net>
4 * 2006 Edgard Lima <edgard.lima@gmail.com>
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"
35 #include "gstv4l2allocator.h"
39 #define GST_TYPE_V4L2_BUFFER_POOL (gst_v4l2_buffer_pool_get_type())
40 #define GST_IS_V4L2_BUFFER_POOL(obj) (G_TYPE_CHECK_INSTANCE_TYPE ((obj), GST_TYPE_V4L2_BUFFER_POOL))
41 #define GST_V4L2_BUFFER_POOL(obj) (G_TYPE_CHECK_INSTANCE_CAST ((obj), GST_TYPE_V4L2_BUFFER_POOL, GstV4l2BufferPool))
42 #define GST_V4L2_BUFFER_POOL_CAST(obj) ((GstV4l2BufferPool*)(obj))
44 /* This flow return is used to indicated that the last buffer of a
45 * drain or a resoltuion change has been found. This should normally
46 * only occure for mem-2-mem devices. */
47 #define GST_V4L2_FLOW_LAST_BUFFER GST_FLOW_CUSTOM_SUCCESS
49 /* This flow return is used to indicated that the returned buffer was marked
50 * with the error flag and had no payload. This error should be recovered by
51 * simply waiting for next buffer. */
52 #define GST_V4L2_FLOW_CORRUPTED_BUFFER GST_FLOW_CUSTOM_SUCCESS_1
54 struct _GstV4l2BufferPool
58 GstV4l2Object *obj; /* the v4l2 object */
59 gint video_fd; /* a dup(2) of the v4l2object's video_fd */
60 GstPoll *poll; /* a poll for video_fd */
62 gboolean can_poll_device;
67 GstV4l2Allocator *vallocator;
68 GstAllocator *allocator;
69 GstAllocationParams params;
70 GstBufferPool *other_pool;
72 GstVideoInfo caps_info; /* Default video information */
74 gboolean add_videometa; /* set if video meta should be added */
75 gboolean enable_copy_threshold; /* If copy_threshold should be set */
77 guint min_latency; /* number of buffers we will hold */
78 guint max_latency; /* number of buffers we can hold */
79 guint num_queued; /* number of buffers queued in the driver */
80 guint copy_threshold; /* when our pool runs lower, start handing out copies */
85 GstBuffer *buffers[VIDEO_MAX_FRAME];
88 gulong group_released_handler;
90 /* Control to warn only once on buggy feild driver bug */
91 gboolean has_warned_on_buggy_field;
94 struct _GstV4l2BufferPoolClass
96 GstBufferPoolClass parent_class;
99 GType gst_v4l2_buffer_pool_get_type (void);
101 GstBufferPool * gst_v4l2_buffer_pool_new (GstV4l2Object *obj, GstCaps *caps);
103 GstFlowReturn gst_v4l2_buffer_pool_process (GstV4l2BufferPool * bpool, GstBuffer ** buf);
105 void gst_v4l2_buffer_pool_set_other_pool (GstV4l2BufferPool * pool,
106 GstBufferPool * other_pool);
107 void gst_v4l2_buffer_pool_copy_at_threshold (GstV4l2BufferPool * pool,
110 gboolean gst_v4l2_buffer_pool_flush (GstBufferPool *pool);
114 #endif /*__GST_V4L2_BUFFER_POOL_H__ */