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
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
|
/* GStreamer
*
* Copyright (C) 2002 Ronald Bultje <rbultje@ronald.bitfreak.net>
* 2006 Edgard Lima <edgard.lima@indt.org.br>
*
* v4l2_calls.h - generic V4L2 calls handling
*
* 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 __V4L2_CALLS_H__
#define __V4L2_CALLS_H__
#include "gstv4l2object.h"
#ifdef HAVE_LIBV4L2
# include <libv4l2.h>
#else
# include <sys/ioctl.h>
# include <linux/videodev.h>
# include <linux/videodev2.h>
# define v4l2_fd_open(fd, flags) (fd)
# define v4l2_close close
# define v4l2_dup dup
# define v4l2_ioctl ioctl
# define v4l2_read read
# define v4l2_mmap mmap
# define v4l2_munmap munmap
#endif
/* simple check whether the device is open */
#define GST_V4L2_IS_OPEN(v4l2object) \
(v4l2object->video_fd > 0)
/* check whether the device is 'active' */
#define GST_V4L2_IS_ACTIVE(v4l2object) \
(v4l2object->buffer != NULL)
#define GST_V4L2_IS_OVERLAY(v4l2object) \
(v4l2object->vcap.capabilities & V4L2_CAP_VIDEO_OVERLAY)
/* checks whether the current v4lv4l2object has already been open()'ed or not */
#define GST_V4L2_CHECK_OPEN(v4l2object) \
if (!GST_V4L2_IS_OPEN(v4l2object)) \
{ \
GST_ELEMENT_ERROR (v4l2object->element, RESOURCE, SETTINGS, \
(_("Device is not open.")), (NULL)); \
return FALSE; \
}
/* checks whether the current v4lv4l2object is close()'ed or whether it is still open */
#define GST_V4L2_CHECK_NOT_OPEN(v4l2object) \
if (GST_V4L2_IS_OPEN(v4l2object)) \
{ \
GST_ELEMENT_ERROR (v4l2object->element, RESOURCE, SETTINGS, \
(_("Device is open.")), (NULL)); \
return FALSE; \
}
/* checks whether the current v4lv4l2object does video overlay */
#define GST_V4L2_CHECK_OVERLAY(v4l2object) \
if (!GST_V4L2_IS_OVERLAY(v4l2object)) \
{ \
GST_ELEMENT_ERROR (v4l2object->element, RESOURCE, SETTINGS, \
(NULL), ("Device cannot handle overlay")); \
return FALSE; \
}
/* checks whether we're in capture mode or not */
#define GST_V4L2_CHECK_ACTIVE(v4l2object) \
if (!GST_V4L2_IS_ACTIVE(v4l2object)) \
{ \
GST_ELEMENT_ERROR (v4l2object->element, RESOURCE, SETTINGS, \
(NULL), ("Device is not in streaming mode")); \
return FALSE; \
}
/* checks whether we're out of capture mode or not */
#define GST_V4L2_CHECK_NOT_ACTIVE(v4l2object) \
if (GST_V4L2_IS_ACTIVE(v4l2object)) \
{ \
GST_ELEMENT_ERROR (v4l2object->element, RESOURCE, SETTINGS, \
(NULL), ("Device is in streaming mode")); \
return FALSE; \
}
/* open/close the device */
gboolean gst_v4l2_open (GstV4l2Object *v4l2object);
gboolean gst_v4l2_close (GstV4l2Object *v4l2object);
/* norm/input/output */
gboolean gst_v4l2_get_norm (GstV4l2Object *v4l2object,
v4l2_std_id *norm);
gboolean gst_v4l2_set_norm (GstV4l2Object *v4l2object,
v4l2_std_id norm);
gboolean gst_v4l2_get_input (GstV4l2Object * v4l2object,
gint * input);
gboolean gst_v4l2_set_input (GstV4l2Object * v4l2object,
gint input);
#if 0 /* output not handled by now */
gboolean gst_v4l2_get_output (GstV4l2Object *v4l2object,
gint *output);
gboolean gst_v4l2_set_output (GstV4l2Object *v4l2object,
gint output);
#endif /* #if 0 - output not handled by now */
/* frequency control */
gboolean gst_v4l2_get_frequency (GstV4l2Object *v4l2object,
gint tunernum,
gulong *frequency);
gboolean gst_v4l2_set_frequency (GstV4l2Object *v4l2object,
gint tunernum,
gulong frequency);
gboolean gst_v4l2_signal_strength (GstV4l2Object *v4l2object,
gint tunernum,
gulong *signal);
/* attribute control */
gboolean gst_v4l2_get_attribute (GstV4l2Object *v4l2object,
int attribute,
int *value);
gboolean gst_v4l2_set_attribute (GstV4l2Object *v4l2object,
int attribute,
const int value);
gboolean gst_v4l2_get_capabilities (GstV4l2Object * v4l2object);
#define LOG_CAPS(obj, caps) GST_DEBUG_OBJECT (obj, "%s: %" GST_PTR_FORMAT, #caps, caps)
#endif /* __V4L2_CALLS_H__ */
|
