1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
|
/* GStreamer
*
* Copyright (C) 2001-2002 Ronald Bultje <rbultje@ronald.bitfreak.net>
* 2006 Edgard Lima <edgard.lima@indt.org.br>
*
* gstv4l2src.h: BT8x8/V4L2 source element
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Library General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Library General Public License for more details.
*
* You should have received a copy of the GNU Library General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#ifndef __GST_V4L2SRC_H__
#define __GST_V4L2SRC_H__
#include <gstv4l2object.h>
GST_DEBUG_CATEGORY_EXTERN (v4l2src_debug);
#define GST_V4L2_MAX_BUFFERS 16
#define GST_V4L2_MIN_BUFFERS 2
#define GST_V4L2_MAX_SIZE (1<<15) /* 2^15 == 32768 */
G_BEGIN_DECLS
#define GST_TYPE_V4L2SRC \
(gst_v4l2src_get_type())
#define GST_V4L2SRC(obj) \
(G_TYPE_CHECK_INSTANCE_CAST((obj),GST_TYPE_V4L2SRC,GstV4l2Src))
#define GST_V4L2SRC_CLASS(klass) \
(G_TYPE_CHECK_CLASS_CAST((klass),GST_TYPE_V4L2SRC,GstV4l2SrcClass))
#define GST_IS_V4L2SRC(obj) \
(G_TYPE_CHECK_INSTANCE_TYPE((obj),GST_TYPE_V4L2SRC))
#define GST_IS_V4L2SRC_CLASS(klass) \
(G_TYPE_CHECK_CLASS_TYPE((klass),GST_TYPE_V4L2SRC))
typedef struct _GstV4l2BufferPool GstV4l2BufferPool;
typedef struct _GstV4l2Buffer GstV4l2Buffer;
typedef struct _GstV4l2Src GstV4l2Src;
typedef struct _GstV4l2SrcClass GstV4l2SrcClass;
/* global info */
struct _GstV4l2BufferPool
{
GstMiniObject parent;
GMutex *lock;
gboolean running; /* with lock */
gint num_live_buffers; /* with lock */
gint video_fd; /* a dup(2) of the v4l2object's video_fd */
guint buffer_count;
GstV4l2Buffer **buffers; /* with lock; buffers[n] is NULL that buffer has been
* dequeued and pushed out */
};
struct _GstV4l2Buffer {
GstBuffer buffer;
struct v4l2_buffer vbuffer;
/* FIXME: have GstV4l2Src* instead, as this has GstV4l2BufferPool* */
GstV4l2BufferPool *pool;
};
/**
* GstV4l2Src:
* @pushsrc: parent #GstPushSrc.
*
* Opaque object.
*/
struct _GstV4l2Src
{
GstPushSrc pushsrc;
/*< private >*/
GstV4l2Object * v4l2object;
/* pads */
GstPad *srcpad;
GstCaps *probed_caps;
/* internal lists */
GSList *formats; /* list of available capture formats */
/* buffers */
GstV4l2BufferPool *pool;
guint32 num_buffers;
gboolean use_mmap;
guint32 frame_byte_size;
/* if the buffer will be or not used from directly mmap */
gboolean always_copy;
/* True if we want to stop */
gboolean quit;
gboolean is_capturing;
guint64 offset;
gint fps_d, fps_n; /* framerate if device is open */
};
struct _GstV4l2SrcClass
{
GstPushSrcClass parent_class;
GList *v4l2_class_devices;
};
GType gst_v4l2src_get_type (void);
G_END_DECLS
#endif /* __GST_V4L2SRC_H__ */
|