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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
23extern "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 */
39LIBV4L_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
62LIBV4L_PUBLIC int v4l1_open(const char *file, int oflag, ...);
63LIBV4L_PUBLIC int v4l1_close(int fd);
64LIBV4L_PUBLIC int v4l1_dup(int fd);
65LIBV4L_PUBLIC int v4l1_ioctl(int fd, unsigned long int request, ...);
66LIBV4L_PUBLIC ssize_t v4l1_read(int fd, void *buffer, size_t n);
67LIBV4L_PUBLIC void *v4l1_mmap(void *start, size_t length, int prot, int flags,
68 int fd, int64_t offset);
69LIBV4L_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.