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1 | /* |
---|---|
2 | # (C) 2008 Hans de Goede <hdegoede@redhat.com> |
3 | |
4 | # This program is free software; you can redistribute it and/or modify |
5 | # it under the terms of the GNU Lesser General Public License as published by |
6 | # the Free Software Foundation; either version 2.1 of the License, or |
7 | # (at your option) any later version. |
8 | # |
9 | # This program is distributed in the hope that it will be useful, |
10 | # but WITHOUT ANY WARRANTY; without even the implied warranty of |
11 | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
12 | # GNU Lesser General Public License for more details. |
13 | # |
14 | # You should have received a copy of the GNU Lesser General Public License |
15 | # along with this program; if not, write to the Free Software |
16 | # Foundation, Inc., 51 Franklin Street, Suite 500, Boston, MA 02110-1335 USA |
17 | */ |
18 | |
19 | #ifndef __LIBV4L1_H |
20 | #define __LIBV4L1_H |
21 | |
22 | #ifdef __cplusplus |
23 | extern "C"{ |
24 | #endif /* __cplusplus */ |
25 | |
26 | #include <stdio.h> |
27 | #include <stdint.h> |
28 | #include <unistd.h> |
29 | #include <libv4l1-videodev.h> |
30 | |
31 | #if HAVE_VISIBILITY |
32 | #define LIBV4L_PUBLIC __attribute__ ((visibility("default"))) |
33 | #else |
34 | #define LIBV4L_PUBLIC |
35 | #endif |
36 | |
37 | /* Point this to a FILE opened for writing when you want to log error and |
38 | status messages to a file, when NULL errors will get send to stderr */ |
39 | LIBV4L_PUBLIC extern FILE *v4l1_log_file; |
40 | |
41 | /* Just like your regular open/close/etc, except that when opening a v4l2 |
42 | capture only device, full v4l1 emulation is done including emulating the |
43 | often not implemented in v4l2 drivers CGMBUF ioctl and v4l1 style mmap call |
44 | in userspace. |
45 | |
46 | Format conversion is done if necessary when capturing. That is if you |
47 | (try to) set a capture format which is not supported by the cam, but is |
48 | supported by libv4lconvert then SPICT will succeed and on SYNC / read the |
49 | data will be converted for you and returned in the request format. |
50 | |
51 | Note that currently libv4l1 depends on the kernel v4l1 compatibility layer |
52 | for: 1) Devices which are not capture only, 2) Emulation of many basic |
53 | v4l1 ioctl's which require no driver specific handling. |
54 | |
55 | Note that no functionality is added to v4l1 devices, so if for example an |
56 | obscure v4l1 device is opened which only supports some weird capture format |
57 | then libv4l1 will not be of any help (in this case it would be best to get |
58 | the driver converted to v4l2, as v4l2 has been designed to include weird |
59 | capture formats, like hw specific bayer compression methods). |
60 | */ |
61 | |
62 | LIBV4L_PUBLIC int v4l1_open(const char *file, int oflag, ...); |
63 | LIBV4L_PUBLIC int v4l1_close(int fd); |
64 | LIBV4L_PUBLIC int v4l1_dup(int fd); |
65 | LIBV4L_PUBLIC int v4l1_ioctl(int fd, unsigned long int request, ...); |
66 | LIBV4L_PUBLIC ssize_t v4l1_read(int fd, void *buffer, size_t n); |
67 | LIBV4L_PUBLIC void *v4l1_mmap(void *start, size_t length, int prot, int flags, |
68 | int fd, int64_t offset); |
69 | LIBV4L_PUBLIC int v4l1_munmap(void *_start, size_t length); |
70 | |
71 | #ifdef __cplusplus |
72 | } |
73 | #endif /* __cplusplus */ |
74 | |
75 | #endif |
76 |
Warning: That file was not part of the compilation database. It may have many parsing errors.