diff options
Diffstat (limited to 'v4l2-apps/lib/libv4l/include/libv4l2.h')
| -rw-r--r-- | v4l2-apps/lib/libv4l/include/libv4l2.h | 110 |
1 files changed, 0 insertions, 110 deletions
diff --git a/v4l2-apps/lib/libv4l/include/libv4l2.h b/v4l2-apps/lib/libv4l/include/libv4l2.h deleted file mode 100644 index b05b57cb6..000000000 --- a/v4l2-apps/lib/libv4l/include/libv4l2.h +++ /dev/null @@ -1,110 +0,0 @@ -/* -# (C) 2008 Hans de Goede <j.w.r.degoede@hhs.nl> - -# This program is free software; you can redistribute it and/or modify -# it under the terms of the GNU Lesser General Public License as published by -# the Free Software Foundation; either version 2.1 of the License, or -# (at your option) any later version. -# -# This program 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 General Public License for more details. -# -# You should have received a copy of the GNU Lesser General Public License -# along with this program; if not, write to the Free Software -# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA -*/ - -#ifndef __LIBV4L2_H -#define __LIBV4L2_H - -#include <stdio.h> -#include <unistd.h> - -#ifdef __cplusplus -extern "C" { -#endif /* __cplusplus */ - -#if __GNUC__ >= 4 -#define LIBV4L_PUBLIC __attribute__ ((visibility("default"))) -#else -#define LIBV4L_PUBLIC -#endif - -/* Point this to a FILE opened for writing when you want to log error and - status messages to a file, when NULL errors will get send to stderr */ -LIBV4L_PUBLIC extern FILE *v4l2_log_file; - -/* Just like your regular open/close/etc, except that format conversion is - done if necessary when capturing. That is if you (try to) set a capture - format which is not supported by the cam, but is supported by libv4lconvert, - then the try_fmt / set_fmt will succeed as if the cam supports the format - and on dqbuf / read the data will be converted for you and returned in - the request format. - - Another difference is that you can make v4l2_read() calls even on devices - which do not support the regular read() method. - - Note that libv4l2 normally does not interfere with enum_fmt, so enum_fmt - will still return the actual formats the hardware supports, and not any - formats which may be emulated on top of that. If you pass the - V4L2_ENABLE_ENUM_FMT_EMULATION flag to v4l2_fd_open (as the v4l2convert.so - wrapper does) then enum_fmt will also report support for the formats to - which conversion is possible. - - Note the device name passed to v4l2_open must be of a video4linux2 device, - if it is anything else (including a video4linux1 device), v4l2_open will - fail. -*/ - -LIBV4L_PUBLIC int v4l2_open (const char *file, int oflag, ...); -LIBV4L_PUBLIC int v4l2_close(int fd); -LIBV4L_PUBLIC int v4l2_dup(int fd); -LIBV4L_PUBLIC int v4l2_ioctl (int fd, unsigned long int request, ...); -LIBV4L_PUBLIC ssize_t v4l2_read (int fd, void* buffer, size_t n); -LIBV4L_PUBLIC void *v4l2_mmap(void *start, size_t length, int prot, int flags, int fd, - __off64_t offset); -LIBV4L_PUBLIC int v4l2_munmap(void *_start, size_t length); - - -/* Misc utility functions */ - -/* This function takes a value of 0 - 65535, and then scales that range to - the actual range of the given v4l control id, and then if the cid exists - and is not locked sets the cid to the scaled value. - - Normally returns 0, even if the cid did not exist or was locked, returns - non 0 when an other error occured. */ -LIBV4L_PUBLIC int v4l2_set_control(int fd, int cid, int value); - -/* This function returns a value of 0 - 65535, scaled to from the actual range - of the given v4l control id. when the cid does not exist, could not be - accessed for some reason, or some error occured 0 is returned. */ -LIBV4L_PUBLIC int v4l2_get_control(int fd, int cid); - - -/* "low level" access functions, these functions allow somewhat lower level - access to libv4l2 (currently there only is v4l2_fd_open here) */ - -/* Flags for v4l2_fd_open's v4l2_flags argument */ - -/* Disable all format conversion done by libv4l2 (reduces libv4l2 functionality - to offering v4l2_read() even on devices which don't implement read()) */ -#define V4L2_DISABLE_CONVERSION 0x01 -/* Report not only real but also emulated formats with the ENUM_FMT ioctl */ -#define V4L2_ENABLE_ENUM_FMT_EMULATION 02 - -/* v4l2_fd_open: open an already opened fd for further use through - v4l2lib and possibly modify libv4l2's default behavior through the - v4l2_flags argument. - - Returns fd on success, -1 if the fd is not suitable for use through libv4l2 - (note the fd is left open in this case). */ -LIBV4L_PUBLIC int v4l2_fd_open(int fd, int v4l2_flags); - -#ifdef __cplusplus -} -#endif /* __cplusplus */ - -#endif |